Journal articles: 'Cutler, Amy'

1

Dening, Tom. "Alzheimer's Disease: Optimizing Drug Development Strategies. By Neal R. Cutler, John J. Sramek and Amy E. Veroff. Chichester: John Wiley. 1994. 168 pp. £35.00 (hb)." British Journal of Psychiatry 167, no. 2 (August 1995): 280–81. http://dx.doi.org/10.1192/s000712500006476x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Williams, Michael. "Alzheimer's disease, optimizing drug development strategies. Neal R. Cutler, John J. Sramek and Amy E. Veroff, John Wiley, Chichester, UK, 1994, viii+ 168 pages, $65.95." Drug Development Research 34, no. 4 (April 1995): 381–82. http://dx.doi.org/10.1002/ddr.430340411.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Zhang, An Ning, Zhao Feng Zhu, and Feng Zhu. "The Finite Element Simulation of Disc Cutter of Different Diameter Breaking Rock." Advanced Materials Research 791-793 (September 2013): 742–45. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.742.

Full text

Abstract:

In this paper, finite element software ANSYS is used to simulate a process of disc cutters of different diameter breaking rock, get the curves of the load of disc cutter of different diameter breaking rock and the curves of the stress exerting on the cutters when the disc cutters cutting different depth. According to the rock breaking mechanism of disc cutter, and established five kinds of disc cutter of different diameter broken rock finite element model, and the numerical simulation was carried out. The loads of disc cutters of different diameter breaking rock and the stress exerting on the cutters are different when the disc cutters cutting different depths. According to the result of the analysis, draw the curve graph of the load of disc cutter breaking rock and the stress exerting on the cutters when the disc cutters of different diameter cutting different depth. According to the curve diagram, the load of disc cutter of different diameter cutting a certain depth and the stress of exerting on the disc cutters can be gotten. The simulative result is instructive for improving the design of disc cutter parameters and improving the development efficiency.

APA, Harvard, Vancouver, ISO, and other styles

4

Cheng, Jun, Ya Dong Gong, Hai Feng Zhao, Yue Ming Liu, and Jian Yu Yang. "A Nonlinear Multi-Objective Optimal Design for Cutter Head of TBM." Applied Mechanics and Materials 80-81 (July 2011): 1046–50. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.1046.

Full text

Abstract:

This paper presents a novel model of lay out of cutter head of TBM(tunnel boring machine). Rock-broken mechanism during the operation of the cutter head is analyzed to study the layout of cutters. A model of the cutters under the action of forces during TBM’s working has therefore been developed, thus proposing a scheme to improve the rock breakability of TBM’s cutter head on which the cutters are lay out. Then, a nonlinear multi-objective mathematical model with complex constraints is developed, with an optimization program provided via an intelligent algorithm for the layout design of cutters on the cutter head of a TBM. The cutter head of an EPB6.28 TBM, an optimized design is given to set up a prototype with digitized cutter head, to which a simulation is done for the verification of equilibrium of forces. Comparing analytically the cutter wear and equilibrium of forces between a previous and a newly designed cutter heads, the results shows digitally that the new one is more practicable than the previous one.

APA, Harvard, Vancouver, ISO, and other styles

5

Zhao, Xiao Xu, and Ya Dong Gong. "Research on the Load on Cutter Head of Hard Rock Tunnel Boring Machine." Applied Mechanics and Materials 684 (October 2014): 303–7. http://dx.doi.org/10.4028/www.scientific.net/amm.684.303.

Full text

Abstract:

Study on the load exerted on cutter head is very useful for the design and performance prediction of hard rock tunnel boring machines. A composite model based on smoothed particle hydrodynamics and finite element method was carried out using AUTODYN software to study the rock fragmentation mechanism of constant cross-section disk cutters in cutter head. The normal force, rolling force and side force on the disk cutters with different cutter radius were researched in the numerical simulation study. The results were verified by historical literature data. To obtain the distribution of the forces with different cutter radius, the loading of cutter head of a Ф5.75 hard rock tunnel boring machine were analyzed. The result shows that it is useful for cutter head’s design and its layout optimization.

APA, Harvard, Vancouver, ISO, and other styles

6

Man, Lin Tao, and Shou Ju Li. "Numerical Simulation of Rock Fragmentation Process Induced by Two Disc Cutters." Advanced Materials Research 366 (October 2011): 224–28. http://dx.doi.org/10.4028/www.scientific.net/amr.366.224.

Full text

Abstract:

Rock fragmentation processes induced by two cutters were simulated by ABAQUS software with different cutter spacing. A series of numerical experiments reproduce the progressive process of rock fragmentation in indentation. The influence of different cutter spacing on the penetration process can also be clearly researched. Rock fragmentation process induced by two TBM disc cutters was performed using the finite element method. The simulation not only provided a realistic description of the rock fragmentation mechanism, but also supported the sufficient proof for the cutter spacing optimization between adjacent disc cutters for a given penetration depth. When the penetration is 6 mm, the cutter spacing optimization is 48 mm. The result shows that the numerical simulations will contribute to an improved knowledge of rock fragmentation in indentation and will be useful for performance assessment of TBM, which will enhance the efficiency of rock breaking.

APA, Harvard, Vancouver, ISO, and other styles

7

Zhang, Yu, Xing Wen Wang, and Hui Fang Liu. "Numerical Simulation of Rock-Breaking Process by Disc Cutter in Tunnel Boring Machine." Applied Mechanics and Materials 487 (January 2014): 513–16. http://dx.doi.org/10.4028/www.scientific.net/amm.487.513.

Full text

Abstract:

The force load research of disc cutter can be used in the design of disc cutter, in order to improve the working life, determine when to change another cutter. Based on the working platform of ABAQUS finite element analysis module, single disc cutter rock-breaking of the simulation model is established, and according to the theory of rocks plastic rule, dynamics analysis and dynamic simulation are done when the cutter is in rock-breaking process by which, the added force can be got when the disc cutter and rocks contact each other in different wear conditions of contact force in the process of the dynamic contact each other. The results show that with the cutter damage increasing, the added force is increased and cutters maximum instantaneous stress load is 1.5 ~ 2.5 times than the average stress load, which has a negative influence on working efficiency. To have a clear understand of cutters design and working life and when to change another cutter in working time, the results also offer an engineering parameters for researching the load state of TBM tunneling.

APA, Harvard, Vancouver, ISO, and other styles

8

Deng, Ke, and Ning Hui Huang. "Design of New Fixture for Standardized Cutter." Applied Mechanics and Materials 201-202 (October 2012): 737–40. http://dx.doi.org/10.4028/www.scientific.net/amm.201-202.737.

Full text

Abstract:

In view of present situation that fixture for standardized cutter can install only one specification of standardized cutter and center height of cutter blade must be calibrated by gaskets, a new-style multi-functional fixture was designed which can clamp various specifications of standardized cutters and be adjusted more precisely and easily by screws. The main design contents include general structure of fixture, installation space of cutter, harford vertical adjusting mechanism, cutter lateral fastening and screwdown column; lateral fastening force, screwdown clamping force and tighten torque of different specifications of cutters are calculated afterwards. It has been proven by practices that the new fixture has good effects and meets demand of production well.

APA, Harvard, Vancouver, ISO, and other styles

9

Wang, Yong Ding, and Wen Lei Shen. "Fluid-Solid Coupling Analysis on Aquatics Hub Cutter." Advanced Materials Research 610-613 (December 2012): 880–83. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.880.

Full text

Abstract:

Hub cutter is a new kind of plant cutters with a good capability of anti-blocking and stability of operating performance. Hub cutter was simulated by using Coupled FEA/CFD analysis in order to get the hydrodynamic pressure value , static pressure and natural frequency. The results show that the change of hydrodynamic pressure on the hub cutter is large. Furthermore, the static pressure was measured focusing on both ends of the aquatics hub cutter. It provides a theoretical basis for designing hub cutters. The study shows that it is feasible to use Coupled FEA/CFD analysis results to predict the performance of hub cutter. This method can be applied in engineering practice and is an innovative design with coupled FEA/CFD analysis.

APA, Harvard, Vancouver, ISO, and other styles

10

Sun, Yuan Xiu, and De Yong Zou. "Experimental Study on Force of Stinger Cutter Breaking Rock." Applied Mechanics and Materials 727-728 (January 2015): 406–10. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.406.

Full text

Abstract:

Singer PDC cutters of five different cone top diameters are designed and manufactured.On the basis of rock-breaking test with stinger PDC cutters, effects of significant factors on cutting forces are discussed, including cutting angle, cutter shape and rock hardness. The test results show that the stinger PDC cutters have the ability of drilling hard rock.The sharper the stinger PDC cutter is, the stronger the ability of drilling the formation will become.15°is an optimal front rake angle.

APA, Harvard, Vancouver, ISO, and other styles

11

Tao, Fu Chun, Guang Chao Chen, Bin Jiang, Bo Chen, and Yan Ding. "High Speed Face Milling Cutters Dynamic Response with Deformation." Advanced Materials Research 500 (April 2012): 186–91. http://dx.doi.org/10.4028/www.scientific.net/amr.500.186.

Full text

Abstract:

Based on the field research, we found that in the course of high-speed face milling aluminum, Cutters components prone to deformation as the role of load such as Centrifugal force, Cutting force and Preload. The deformation will directly affect the the dynamic performance of the cutter. So its necessary to reveal the dynamic response of the deformation cutter. We base on the Dynamic model and the modal analysis model, Obtained the deformation cutters dynamic simulation which the cutters deformation is come from the ANSYS. At last we got the method of identifying cutters deflection deformation by vibration signal. With the method we can effectively identifying milling distortion In the cutting process.

APA, Harvard, Vancouver, ISO, and other styles

12

Li, Gang, Li Da Zhu, Jian Yu Yang, and Wan Shan Wang. "A Method to Predict Disc Cutter Specific Energy for TBM Based on CSM Model." Applied Mechanics and Materials 236-237 (November 2012): 414–17. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.414.

Full text

Abstract:

By using fracture mechanics theory of rock, the rock fragmentation mechanism of tunnel boring machine (TBM) cutters is analyzed and the analysis of forces of cutter is carried out. A new method to predict disc cutter specific energy for TBM is developed in this study. By using the dynamic models of TBM cutters interaction with the rock, specific energy prediction model for TBM cutter head is developed. The data from the actual tunnel construction is analyzed by using an example of Qinling tunnel and the comparison is made with the field data. The results indicate that the model developed in this study could not only replace the experiment to disc cutter specific energy for TBM, but also provide a theoretical basis for the performance prediction and optimal design of cutter head for TBM.

APA, Harvard, Vancouver, ISO, and other styles

13

Jia, Zhen Yuan, Jun Zou, Xiao Hong Lu, and Zong Jin Ren. "Design and Dynamic Deformation Analysis for Elastic Cutter Fixture of Tool Grasper Mechanism on Disc Type Tool Magazine with Double Loop Cutters." Applied Mechanics and Materials 494-495 (February 2014): 341–44. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.341.

Full text

Abstract:

Double loop cutters arrangement can settle the contradiction between rotational inertia of the tool magazine and the dimension limitation of the cutter head effectively, and increase the store of tools. Disc type tool magazine with double loop cutters arrangement is designed and researched. The spring steel 65Mn is used to manufacture elastic cutter fixture as the holding device for its inner and outer loop tools. The dynamic deformation of elastic cutter fixture is discussed. The entire geometric movement process of elastic cutter fixture from being opened by the tool holder to accomplishing the whole action is analyzed. The effect and trend of inner stress caused by geometric deformation are studied. Furthermore, the force condition in each part of tool fixture can be calculated, thus predicting the motion stability and reliability of the elastic cutter fixture, and providing theory references for the design of elastic cutter fixture.

APA, Harvard, Vancouver, ISO, and other styles

14

Prokopenko, Sergey A. "Multiple Service Life Extension of Mining and Road Machines’ Cutters." Applied Mechanics and Materials 682 (October 2014): 319–23. http://dx.doi.org/10.4028/www.scientific.net/amm.682.319.

Full text

Abstract:

Summary: Modern mining and road machines in all countries of the world are equipped mostly with expendable tangential rotary cutters which results in high consumption of metal and high costs of rock breaking. A reusable cutter for mining and road machines was designed and tested. The article describes the procedure and results of the cutter tests in the Kuzbass mines. The tests showed high technical and economic efficiency of the innovative cutters.

APA, Harvard, Vancouver, ISO, and other styles

15

Ruan, Xiao Guang, Yin Chen Wang, Dang Fei Zhang, Han Xin Cao, Min Sun, and Fu Yang Li. "Introduction of Characteristics and Choice of CNC Machining Cutter." Advanced Materials Research 421 (December 2011): 329–33. http://dx.doi.org/10.4028/www.scientific.net/amr.421.329.

Full text

Abstract:

The article introduces the unique characteristics of CNC machining center cutter compared to traditional cutters, analyzes the choice of CNC machining cutter and factors of choice. Meanwhile, proved by the examples with manufacture software CAXA2004, the correct choice of CNC machining center cutter can give full play to the advantages of CNC machining and improve the economic efficiency and production levels of enterprises.

APA, Harvard, Vancouver, ISO, and other styles

16

Zhao, Duo, Jian Qin Liu, and Wei Guo. "The Simulation of Cutter-Rock Interaction in PFC." Applied Mechanics and Materials 170-173 (May 2012): 3385–89. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3385.

Full text

Abstract:

TBM is a modern machine used in the underground engineering. This machine excavates tunnel with the cutters arranged on its cutter head. The research of the cutter-rock interaction is an important work in improving the machine's behaviour. A simulation of the interaction is presented in this paper. The effects of the rake angle, blade angle and cutting depth on cutter force and crack number in rock are discussed, which provide a complement to the cutter-rock interaction research.

APA, Harvard, Vancouver, ISO, and other styles

17

Zhu, Li Da, Peng Cheng Su, Gang Li, and Wan Shan Wang. "Dynamic Analysis of Cutter Head System in Tunnel Boring Machine." Advanced Materials Research 186 (January 2011): 51–55. http://dx.doi.org/10.4028/www.scientific.net/amr.186.51.

Full text

Abstract:

To obtain the reasonable layout and structure shapes of the various kinds of cutters in tunnel boring machine (TBM), the kinematic/dynamic of cutter head system was analyzed by using virtual prototype and finite element method (FEM). The velocity and force curves were got from different positions of cutters and the mode vibration of scrapers and cutter hobs were obtained to analyze their structural performances next stage. It is shown that these results can provide references for dynamic optimization design of tunnel boring machine. Therefore, it is necessary to implement kinematic/dynamic analysis and mode analysis before manufacture of production.

APA, Harvard, Vancouver, ISO, and other styles

18

Zhou, Peng, Chao Wang, Wei Xian Gao, and Yu Hou Wu. "Research on the Rock Breaking by Double Disc Cutter Test-Bed." Advanced Materials Research 690-693 (May 2013): 2484–89. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2484.

Full text

Abstract:

Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of tool systems is its main failure form. Rock hob test-bed is the only testing equipment for tool failure and wear. In this paper, the breaking rock by the double disc cutter is simulated and four kinds of rocks are selected to test the influece of rock characteristics and spacing between two disc cutters on the rock breaking by the double disc cutter test-bed. The results show that there is different optimal spacing between two disc cutters for different rock; the optimal spacing is inversely proportional to the hardness of the rocks; the maximum stress appears the boundary between the disc cutter and rock.

APA, Harvard, Vancouver, ISO, and other styles

19

Wang, Teng Yue, Ke Zhang, Hong Sun, Yu Hou Wu, and Kai Jun Zhao. "Analysis on the Stress and Failures of Disc Cutter of Full Face Rock Tunnel Boring Machine." Advanced Materials Research 102-104 (March 2010): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.223.

Full text

Abstract:

Full face rock tunnel boring machine (TBM) plays an important role in boring rock of tunnel. The failure of disc cutter is the main reason leading to low efficiency of TBM. In this paper, analysis of force and motion for disc cutter are carried by using ABAQUS to study stress distribution and concentration in disc cutter and rocks. Influence of different rocks on stress in disc cutter is analyzed. By combination the failure modes of disc cutter and its stress distribution, methods of decreasing failures of disc cutter are presented. Wear resistance and service life of disc cutter are improved by matching the materials of disc cutters with rocks. The results are useful for structural optimization and strengthening treatment of material of disc cutter.

APA, Harvard, Vancouver, ISO, and other styles

20

Yang, Kai, Yi Min Xia, and Yuan Wu. "Studies on Rock-Breaking of Positive Disc Cutter and Edge Disc Cutter." Applied Mechanics and Materials 508 (January 2014): 159–64. http://dx.doi.org/10.4028/www.scientific.net/amm.508.159.

Full text

Abstract:

Based on TBM disc cutter layout, a rock-breaking model of positive disc cutter and edge disc cutter is built. Sequential rock-breaking of the two cutters under different parameters is simulated; rock fragmentation, three-axis force and energy consumption are studied; optimal rock-breaking condition with different parameters is determined; feasibility of the simulation model is finally verified by experiment. The results show that three-axis force of positive disc cutter and edge disc cutter both increase with the increase of rock strength. Also, the increase of installation angle leads to larger three-axis force of edge disc cutter. Compared with positive disc cutter, edge disc cutter suffers larger squeezing strength from rocks, which results in larger three-axis force in edge disc cutter. Specific energy consumption variation has an inflection point. To meet optimal rock-breaking condition, the optimal values of installation angle in breaking siltstone, granite and marble are respectively 6°, 7° and 7°.

APA, Harvard, Vancouver, ISO, and other styles

21

Li, Yan, Ke Zhang, Jian Sun, Hong Sun, and Zi Nan Wang. "Research on the Optimal Disc Cutter Spacing for Rock-Breaking Based on ANSYS." Applied Mechanics and Materials 664 (October 2014): 143–47. http://dx.doi.org/10.4028/www.scientific.net/amm.664.143.

Full text

Abstract:

Objective: To study the influence of disc cutter spacing on rock fragmentation efficiency and optimize cutter layout and improve the efficiency of disc cutter. Method: ANSYS, a finite element software was used to simulate double disc cutter cutting process. Result: Find a good corresponding relationship between penetration and cutter spacing. At the process of sandstone, if disc cutter spacing as 54 ~ 55 mm, rock crushing as the largest and rock fragmentation efficiency is the highest; with the penetration of 10 mm. If disc cutter spacing as 66~68.5mm, rock crushing as the largest and rock fragmentation efficiency is the highest with the penetration of 15 mm. Changing the cutter spacing and penetration, rock stress and broken degree will also change. Conclusion: Double disc cutters change within the range of best cutter spacing, cutter spacing is proportional to the rock crushing. If the cutter distance is greater than the best cutter spacing, the ledge will be appeared. For one type of rocks, the penetration would have some effects on the optimal cutter spacing. If the penetration increases, the optimal cutter spacing increases gradually, at the time of other construction parameters unchanged.

APA, Harvard, Vancouver, ISO, and other styles

22

Zhang, Guang Guo, Wei Jiang, Hong Hua Zhang, and Huan Wang. "The Finite-Element Analysis of Cylindrical Helical Tooth Milling Cutter Based on Marc." Applied Mechanics and Materials 52-54 (March 2011): 1147–52. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1147.

Full text

Abstract:

In the traditional designs of milling cutter, we cannot get the required accuracy of machining as there may be local deformation on the edges, even more the cutter can break down. Aiming at this situation, a finite-element model of straight pin milling cutter with helical tooth are built using Marc, a nonlinear finite-element analysis software, the different cutting forces of the milling cutter during the cutting process are analyzed and the cutting forces of the milling cutter at different parameters are studied. We get the stress, the strain and the temperature distribution of the milling cutter in different situation. Our work offer a theoretical basis of improving stress of the cutter, designing the structure of cutters reasonably and analyzing the cutter failure as well as a new method of analysis and calculation of the cutter life and strength.

APA, Harvard, Vancouver, ISO, and other styles

23

Wang, Yong Ding, and Wen Lei Shen. "Numerical Research on Performance Prediction for Aquatics Hub Cutter." Advanced Materials Research 479-481 (February 2012): 1618–21. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1618.

Full text

Abstract:

Hub cutter is a new kind of plant cutters, with a good capability of anti-blocking and a good stability of operating performance. Hub cutter was simulated by using commercial code FLUENT in order to get the dynamic pressure and integrative data about the field of dynamic pressure. The results showed that the change of surface pressure on the hub cutter is large. And the pressure side received large impact force. It provides a theoretical basis for the design of pressure side and suction side of hub cutter. The study shows that using FLUENT simulation results to predict performance of hub cutter is feasible. The method can be applied in engineering practice and is an innovative design with FLUENT.

APA, Harvard, Vancouver, ISO, and other styles

24

Jiang, Bin, S. C. Yang, Yin Jin Yang, Min Li Zheng, and P. Sun. "Cluster Analysis on Vibration Characteristic in High Speed Ball-End Milling Hardened Steel." Advanced Materials Research 188 (March 2011): 145–49. http://dx.doi.org/10.4028/www.scientific.net/amr.188.145.

Full text

Abstract:

Aim at the uncertainty of vibration behavior in high speed ball-end milling hardened steel, carried out the experiment of high speed milling hardened steel and modal analysis of cutter, studied vibration behavior of cutter and workpiece, and established vibration behavior sequence of high speed milling hardened steel. Using gray system theory, did gray cluster analysis of vibration characteristics, explored the correlation among cutter vibration, workpiece vibration and surface roughness characteristics, put forward the method of characterizing vibration characteristics in high speed ball-end milling hardened steel. The results show that high frequency vibrations of cutter and workpiece are caused by the interaction of centrifugal and dynamic cutting force, the increase of cutter overhang enhances high frequency vibration of cutter, the characteristic of cutter vibration changes from low frequency vibration to interaction of low frequency vibration and high frequency vibration. Using cutters with different overhang, surface roughness of high speed milling hardened steel has similar characteristics, surface roughness in row spacing direction can characterize low frequency vibration of cutter, and surface roughness in feed can characterize resonance characteristic of cutter caused by high frequency vibrations of cutter and workpiece.

APA, Harvard, Vancouver, ISO, and other styles

25

Ma, Zhi Hong, Yan Jie Wang, Shan Le Cai, and Zhong Zheng Zhang. "Worm Shaving Cutter Tooth Stress and Deformation Analysis." Advanced Materials Research 889-890 (February 2014): 288–91. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.288.

Full text

Abstract:

This paper discusses a new type of worm gear shaver shaving cutter tooth contact point during deformation force, and the establishment of the shaving force model, through the instantaneous cutting force to analyze the force deformation cutter shaving cutter tooth and precision of impact. And making use of a simplified model for variable cross-section cantilever, analyzing of tooth stiffness at any cross section, find the maximum amount of deformation of worm gear shaving cutters do theoretical foundation structure optimization.

APA, Harvard, Vancouver, ISO, and other styles

26

Xavier, Jonathan da Silva, Emiliano Ricardo Vasconcelos Rios, Leonardo Freire Vasconcelos, Joyce Fonteles Ribeiro, and Alyne Mara Rodrigues Carvalho. "ANÁLISE DA PARTIÇÃO DE COMPRIMIDOS DE CARBAMAZEPINA." Revista Expressão Católica Saúde 4, no. 1 (May 28, 2019): 26. http://dx.doi.org/10.25191/recs.v4i1.2371.

Full text

Abstract:

A partição de comprimidos frequentemente afeta a posologia, principalmente quando se trata de comprimidos de liberação sustentada. O presente estudo objetivou analisar e discutir a partição de comprimidos de carbamazepina realizada com faca de cozinha e com cortador de comprimidos. Foram utilizados para análise, comprimidos de carbamazepina (medicamento genérico) e Tegretol® (medicamento referência) classificados respectivamente com Amostra 1 (Am1) e Amostra 2 (Am2), ambos na concentração de 200 mg. Foram realizados os testes de peso médio, dureza, friabilidade e desintegração nos comprimidos íntegros e provenientes de partição em ambas amostras. A partição foi realizada por um cortador de comprimidos e por uma faca de cozinha e os resultados obtidos comparados. No teste de peso médio os comprimidos íntegros da Am1 e Am2 apresentaram resultados satisfatórios, já os partidos de ambas as amostras apresentaram resultados insatisfatórios. Para dureza a Am1 estava dentro dos limites, já algumas partes da Am2 seccionados com faca e cortador estão fora do limite. Quando testado a friabilidade na Am1 foram observados resultados satisfatórios, porém a Am2 integra e algumas partes foram reprovadas. A desintegração da Am1 integra foi acima do tempo estimado, já a Am2 integra desintegrou-se em um tempo satisfatório, em ambas amostras os comprimidos partidos se desintegraram em aproximadamente metade do tempo dos comprimidos íntegros. Diante do exposto observamos que a partição é desaconselhável, sendo a massa alterada, a capacidade de resistência a situações adversas comprometida e a uniformidade do conteúdo modificada, colocando a terapia medicamentosa em falha. ANALYSIS OF TABLET SPLITTING OF CARBAMAZEPINE ABSTRACT Splitting tablets often affects the dosage, especially when it refers to sustained-release tablets. The present study aims at analyzing and discussing the splitting of carbamazepine tablets with knifes or pill cutter. Carbamazepine (generic drug) and Tegretol® (reference medicine) tablets, classified respectively with Sample 1 (SPL1) and Sample 2 (SPL2), both at the concentration of 200 mg, were used for analysis. The tests of average weight, hardness, friability and disintegration were performed in both the intact tablets and in the split samples. The splitting was done with a pill cutter and with a kitchen knife and the results obtained were compared. In the test of average weight, the intact tablets of SPL1 and SPL2 presented satisfactory results; however, the split pills of both samples presented unsatisfactory results. For hardness, SPL1 was within the limits; on the other hand, some parts of SPL2 divided with knife and pill cutter were out of the limit. Satisfactory results were observed concerning the friability test in SPL1, but SPL2 with intact pills and some pieces were disapproved. The disintegration of the integral SPL1 was over the estimated time; the integral SPL2, however, disintegrated in a satisfactory time, and in both samples the split tablets disintegrated in approximately half the time of the intact tablets. Therefore, we observed that splitting pills is inadvisable, as the mass is altered, the resistance to adverse situations is compromised as well as the uniformity of the content is modified, placing the drug therapy in risk.

APA, Harvard, Vancouver, ISO, and other styles

27

Jiang, Bin, Min Li Zheng, Wen Chao Xu, and L. Jiang. "Structural Design Method of High Speed Face Milling Cutter Based on Theory of Axiomatic Design." Advanced Materials Research 69-70 (May 2009): 456–60. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.456.

Full text

Abstract:

Using grey system theory in axiomatic design of high speed face milling cutter, the structural design method of cutter was investigated. The problem of parameter interaction and function coupling in axiomatic design of cutter was solved using the analysis method of grey cluster, and realized the reconstruction of design matrix and collaborative design planning. Results show that there is not design loop which exists in the development of high speed milling cutter, the effects of simplifying design process, shortening design cycle and improving collaborative design are validated in development of high speed face milling cutter. Results of experiments indicate that cutting vibration of high speed face milling cutter using structural design method is depressed, the cutters with higher safety and cutting stability, and their cutting performance have met the requirement of high speed milling.

APA, Harvard, Vancouver, ISO, and other styles

28

Guo, Yi, Zhi Qiang Li, and Su Bo Tian. "Kinematic Analysis and Virtual Design of the Cutter of Seedling Vegetable Harvester." Applied Mechanics and Materials 380-384 (August 2013): 152–55. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.152.

Full text

Abstract:

[Purpose] To solve problems in design of the cutter for seedling vegetable harvesters, a cutter with a double-eccentric circle cam mechanism has been built. [Method] A mathematical model for kinematic analysis of cutters driven by a double-eccentric circle cam mechanism has been established. Under the model, Matlab has been employed to make kinematic analysis on displacement, speed and acceleration. Also, SolidWorks software has been adopted for virtual design of parts and assemblies of the cutter. [Results] The cutter has been applied to the seedling vegetable harvester for the experimental purpose and turned out to operate reliably and produce uniform height and leveling shearing fracture. [Results] This design will provide theoretical basis and practical reference for relevant researches.

APA, Harvard, Vancouver, ISO, and other styles

29

Ji, Sheng Yuan, Xian Li Liu, Dian Lin Ma, Yun Peng Ding, and J. Wu. "Parametric Design of Face Milling Cutter Based on UG Template Model." Advanced Materials Research 188 (March 2011): 336–39. http://dx.doi.org/10.4028/www.scientific.net/amr.188.336.

Full text

Abstract:

UG template model-based parametric design method plays an important role in improving face milling cutter design efficiency and ensuring design accuracy. Three kinds of parameter design method are described in this paper. Parametric design of series for face milling cutters is completed with UG software and UG template model, moreover, user menu and an interactive window are customized, which improves design efficiency and accuracy of face milling cutter. Meanwhile, this study can provide reference for more model design and functional development.

APA, Harvard, Vancouver, ISO, and other styles

30

Xia, Yi Min, Xi Wen Zhou, Jing Xue, and De Zhi Luo. "Structural Analysis of Composite Shield Cutter-Head and Cutters Arrangement Optimization Based on Finite Element." Advanced Materials Research 97-101 (March 2010): 3741–44. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3741.

Full text

Abstract:

With the comprehensive use of finite element and computer simulation, the cutter-head was analyzed and optimized. Based on the full analysis of structural features of the cutter-head, the finite element analysis model of the cutter-head was set up by using Solidworks and ANSYS. The analyses of the cutter-head under two kinds of limit load conditions were carried out and the stress distribution of the cutter-head was obtained. According to the tunneling characteristics, the cutters were re-arranged. The analysis showed that under the same conditions, the stress distribution of the improved structure was more symmetrical and the maximum stress and maximum deformation also had a remarkable reduction. Also there was a greater stress between the corbel and the flange; it would be of vital significance to increase the welding strength of these parts. And the results could provide basic data for the structure design of cutter-head.

APA, Harvard, Vancouver, ISO, and other styles

31

Fu, Y. F., J. Gong, D. M. Zhu, Y. J. Liu, Hui Huang, and Mao Fang Huang. "Fatigue Damage of a Cutter Used for Cutting Cashew Nut under Random Load." Applied Mechanics and Materials 743 (March 2015): 49–54. http://dx.doi.org/10.4028/www.scientific.net/amm.743.49.

Full text

Abstract:

To study the fatigue damage of a cutter used for cutting cashew nut, the integrated simulation platform is established with Hypermesh, LS-Dyna, LS-PrePost, and nCode GlyphWorks. The simulation model is established by Hypermesh. LS-Dyna is used to calculate the k file. LS-PrePost is used as the post-processing software. The rain-flow counting, load superposition and extrapolation are executed using Rainflow module in nCode GlyphWorks. The analysis of the fatigue damage of the cutter is executed using Stress Life module in nCode GlyphWorks. The equivalent stress time history of different elements in the upper and lower cutters, rain-flow counting histogram after load spectrum superposition, rain-flow counting histograms after load spectrum extrapolation, and damage histogram of the cutter are obtained. The results show that the cutter has excellent mechanical properties, and the minimum fatigue life of the cutter is about 495 days, which is a conservative solution.

APA, Harvard, Vancouver, ISO, and other styles

32

Fan, Li Cheng, L. N. Sun, and Zhi Jiang Du. "A New Tool-Path Generation Algorithm for Sculptured Surface Using Taper-Cutter." Applied Mechanics and Materials 10-12 (December 2007): 308–11. http://dx.doi.org/10.4028/www.scientific.net/amm.10-12.308.

Full text

Abstract:

In 3-axis NC machining, most algorithms of the sculptured surface tool-path generation are valid for ball-cutter, and the axes are designed to realize pure translation. A tool-path generation algorithm using taper-cuter is proposed in this article. And one axis of the 3-axis NC tool machine is designed to realize swing motion. The Stereo Lithography (STL) model is the most popular triangular mesh approximation of the 3D surface model. Considering the special swing mechanical and taper-cutter, arc-zigzag tool-path planning and deform Z-map grid methods are proposed, which incorporate triangular vertexes method and the Z-map method. Finally, some simulation and experiment results are provided.

APA, Harvard, Vancouver, ISO, and other styles

33

Feng, Huan Huan, Kui Chen, Jian Jun Zhou, Feng Yuan Li, and Zhu Feng Wang. "Design and Study on a Vertical Comprehensive Experimental Platform for Function between Disc Cutter and Rock." Advanced Materials Research 798-799 (September 2013): 361–64. http://dx.doi.org/10.4028/www.scientific.net/amr.798-799.361.

Full text

Abstract:

For better research on rock breaking mechanism of shield disc cutter, a kind of vertical experimental platform was designed after the characteristic analysis of existing linear cutting rig, using rock box turning to realize the rotary simulated motion of shield disc cutter. Compared with the linear device, this experiment platform overcomes the lack of real simulation of shield disc cutter movement condition. The design of comprehensive experimental platform was described particularly from the three aspects of electronic control system, hydraulic system and an adjusting device for cutter space. On the produced platform, which is the first one in China, the experiments of rolling experiment under three cutters sequential indentation were performed. The experimental data and analysis result were basically consistent with engineering data and simulation result based on RFPA. The correctness of design scheme, advancement and scientificalness of experiment platform were confirmed, with the hoping of providing dependable platform for the research on rock breaking mechanism of shield disc cutter.

APA, Harvard, Vancouver, ISO, and other styles

34

Xia, Yi Min, Tao Ouyang, Lv Jian Xie, Qing Tan, Chun Lei Luo, Hai Ming Zhao, and Zhuo Chen. "The Development of the TBM Disc Cutter Test Device for Cutting Rock." Advanced Materials Research 889-890 (February 2014): 292–96. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.292.

Full text

Abstract:

In order to study the disc cutter cutting performance and the cutters combination feature and to explore a new high-efficiency breaking method in hard rock environment, a new multifunction disc cutter test device plan is established and carried out based on the analysis of relevant research and test equipment at home and abroad. The test device consists of a vertical loading mechanism, a longitudinal cutting mechanism, a shock loading mechanism and a control system, etc. It can be used to conduct not only single test such as cutting under static load, fragmentation under impact load, indentation test under static load and wear test of the disc cutter, but also combined cutting test under impact and static load. At last, granite was cut on this test device by the TBM disc cutter under different loads, the results are desirable and show that the test machine can provide the relevant test conditions and the basic data for the design of the TBM disc cutter.

APA, Harvard, Vancouver, ISO, and other styles

35

Wang, Zhi Qiang, Gui Ying Zhang, and Bin Liu. "Detection of Wear Condition of Micro Milling Cutters Based on Length Fractal Dimension." Applied Mechanics and Materials 577 (July 2014): 697–700. http://dx.doi.org/10.4028/www.scientific.net/amm.577.697.

Full text

Abstract:

In this paper, a new method to realize online wear detection of micro-milling cutters based on length fractal dimension is proposed. On the basis of expression derivation of length fractal dimension, experiments are conducted. First, several cutters with different wear condition are chosen as reference samples. Their multi-section vibration signals in time-domain are collected and the clustering domain δ of each sample are obtained based on length fractal dimensions. Then, the vibration signals of tested cutters are monitored and analysed in time domain, thus their length fractal dimension are abstracted. Comparing the length fractal dimension of tested cutters with the clustering domain δ of reference samples, the wear condition of tested cutters are detected. The experimental results show that the length fractal dimension of each tested cutter falls in the clustering domain corresponding to the actual wear condition.

APA, Harvard, Vancouver, ISO, and other styles

36

Kuzin, Valery V., Sergey N. Grigoriev, and Mike Fedorov. "Applications of Multi-Level Method of Stress-Strain State Analysis in Ceramic Tools Design." Applied Mechanics and Materials 827 (February 2016): 173–76. http://dx.doi.org/10.4028/www.scientific.net/amm.827.173.

Full text

Abstract:

The multi-level method of stress-strain state analysis of ceramic parts is created. The algorithm for the designing of cutters with ceramic inserts is developed with the application of this method and it is successfully implemented in the manufacturing of cutter for groove cutting in tempered workpieces.

APA, Harvard, Vancouver, ISO, and other styles

37

Wang, Peng Lei, Yi Min Xia, Tao Ouyang, Lu Tang, and Ben Guo. "Development and Application of Test Apparatus for Cutting Performance of Cutters of Large Excavation Equipment." Applied Mechanics and Materials 670-671 (October 2014): 497–501. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.497.

Full text

Abstract:

In order to study the physical phenomena and mechanical properties of cutters when cutting rock, a test apparatus for cutting performance of cutters of large excavation equipment is established. The test apparatus is composed of a vertical loading system, a rotary loading system, a control system and a test system. Tests of different cut penetrations and spacings were carried out using the test apparatus. Meanwhile, the real-time images of the cutting process and forces acting on the cutters were obtained. The result shows that the test apparatus has good practicality and reliability, and it provides a laboratory test method to study the cutter-rock coupling mechanism and cutting performance of cutters.

APA, Harvard, Vancouver, ISO, and other styles

38

Liu, Wan Zhu, Qiang Liu, Ge Gao, and Xue Yan. "The Effects of Curvature Radius on Cutting Force and Stability during End Milling." Advanced Materials Research 314-316 (August 2011): 1721–26. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1721.

Full text

Abstract:

The influence of radius ratio of cutting point and cutter on cutting force and stability during end milling process is presented in this paper. To derive motion equations, a 2 DOF mechanical model of end milling considering both regenerative and self-excited effects was established. Different ratio values during three milling conditions were analyzed. Cutting forces as well as stability under different radius ratios by changing curvature radius and cutter radius were elaborated respectively. The results show that when other parameters are set fixed, cutter with relative large radius has smaller cutting force and larger stable range. Cutters with same radius will overlap on cutting force when radius ratio is large enough even under different milling conditions. The proposed analysis on cutting force and stability can be used to determine the optimal parameters, such as cutter radius and spindle speed etc. to improve the accuracy and productivity.

APA, Harvard, Vancouver, ISO, and other styles

39

Wang, Fei, Da Jun Yuan, Rong Cai, Yong Jiang Mu, and Meng Shu Wang. "Field Test Study on Cutting Obstacle Piles Directly by Shield Cutters." Applied Mechanics and Materials 353-356 (August 2013): 1433–39. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.1433.

Full text

Abstract:

Shield cutting obstacle pile directly has significant economic and social benefits compared to traditional methods, however, the corresponding cutting technology is far from mature currently in the international. Based on the construction need of cutting 14 bridge piles with the diameter of 1.0~1.2 meters by Suzhou subway shield, the preliminary scheme of cutter configuration was studied and proposed first, and then the worlds first field test of shield cutting reinforced concrete piles was carried out, the effect and rule of shield cutters cutting piles were analyzed, and the cutter configuration scheme was verified and optimized. The test results indicate that the shell cutter is fit for cutting reinforced concrete pile, its cutting effect on rebar and concrete is shear cutting; In order to make rebar shorter, we should make the rebar be cut off instead of pulled off as possible as we can. The main damage form of shell cutter is alloy cracked. Cutting side pile produces more damage on shell cutter than cutting central pile. The shell cutter configuration scheme should not only satisfy the whole cutting ability and covering the entire cutting plane, but also to be favorable to fix rebar by surrounding concrete.

APA, Harvard, Vancouver, ISO, and other styles

40

Gao, Ming Zhong, Chao Li, and Xiang Chao Shi. "The Mechanism of TBM Cutter Wear in Mixed Ground." Advanced Materials Research 446-449 (January 2012): 3341–45. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.3341.

Full text

Abstract:

The TBM cutter wear causes not only low performance of tunneling but also the additional cost of cutter discs and potential safety hazard in construction. Excessive cutter wear and replacement were observed in tunneling with a TBM through sandy cobble stratum in Chengdu metro Line 1. Comparison with other geological layer, the ground has leaded to more cutter wear. Moreover, the form of wear is great varieties which include flat wear, multi-flat wear, eccentric wear and cutter bearing breakage etc. Based on the statistical analysis, general rule can be found that the number of cutter wear or replacement increases along the outer radial direction of the cutterhead. This paper has adopted the engineering analog method and theoretical research to study the mechanism of cutter wear. There are three forces acting on the cutter, namely the normal force, the rolling force and the side force. Thereinto, the high shock the normal force and random side force are primary causes of cutter wear. Putting the engineering geology and field survey into consideration, the immediate causes could be as follows: ①There are more hard cobble stone with high quartz contents in the layer; ②When the cutter traversed from soft soil to hard rock, very high shock loads can be imposed on the cutter assembly; ③The roller cutters sometimes were blocked and resulted in flat wear because of muck cake in the centre part of the chamber. In a word, the main causes of cutter wear are geological condition. By analyzing the TBM performance, the soil conditioning should be highlighted for the pebbles with sand matrix layers. Soil conditioning not only improves the flow of muck, control of earth pressure, face stability, but also reduces cutter, cutterhead and screw conveyor wear. The results are to be applied to a tunneling project where such ground condition was encountered

APA, Harvard, Vancouver, ISO, and other styles

41

Huo, Jun Zhou, Hai Feng Zhao, Xu Zhang, Wei Sun, and Yu Zhao. "Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-Spiral Layout Pattern." Advanced Materials Research 308-310 (August 2011): 1288–91. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1288.

Full text

Abstract:

The multi-spiral layout pattern has been widely adopted in practice during the layout design of the cutters. Considering the engineering technical requirements and the corresponding structure design requirements of the cutter head, this study formulates a nonlinear multi-objective mathematical model with multiple constraints for the cutters plane layout design based on a multi-spiral layout pattern. And then a genetic algorithm is employed to solve a cutters’ multi-spiral layout problem. An instance of the cutters’ plane layout design was solved by the proposed methods using a multi-spiral layout pattern. Experimental results showed the effectiveness of the method of combining the mathematical model with the algorithms, and the pros and cons of the multi-spiral layout pattern.

APA, Harvard, Vancouver, ISO, and other styles

42

Lin, Ai Qin, Min Li Zheng, Chun Guang Fan, and Lin Yang. "Surface Morphology Simulation of High Speed Milled of Face Milling Cutters." Advanced Materials Research 305 (July 2011): 225–29. http://dx.doi.org/10.4028/www.scientific.net/amr.305.225.

Full text

Abstract:

To surface milling cutters for research object, established considering the single spindle partial pendulum milling cutter tooth surfaces of high speed cutting 3d surface morphology simulation model by using graphic matrix transformation principle and vector algorithms. Comparing the simulation and forecast of surface morphology and surface roughness with the actual machining surface morphology and surface roughness by using the workpiece simulation algorithm meshing, we verify the correctness of the simulation model. The simulation analyses the influence regularity of surface morphology and surface roughness by changing cutting parameters and geometrical parameters. This can help us choosing the reasonable cutting parameters and geometrical parameters and have significance on the actual machining. The surface milling cutters are high efficiency and good quality of cutting big plane or curved surface. With the development of high speed cutting technology, in high speed milling process, product crumbs tumor and scales thorn hardly exists, so cutter geometrical parameters, cutting data and so on will be the main influence reasons of surface roughness. In order to satisfied the quality requirements, at present, we choice tools and determine the milling parameters depending on experience but it is limited. The surface roughness of the processing components is reflected intuitively by processed surface of microscopic geometric shape. So surface of microscopic geometric shape produced by theory emulation is significant to forecast the surface roughness and selecting reasonable cutting parameters. Currently, there are some simulation method researches about surface of microscopic geometric shape. Zhao Xiao ming et al [1, 2] has researched the simulation modeling of microscopic geometric shape of ball end mills during processing; Xu An ping et al [3, 4] has researched the simulation modeling methods of peripherally milling processing; Zhang Guang Peng et al [5] has researched the inversion multiple tooth surfaces of the milling cutter surface morphology simulation and develop simulation software. But all above researches are ideal simulation of surface shape. There are few researches about simulation of surface shape on condition of spindle partial pendulum. Based on object of surface milling cutters, this article researches simulation modeling methods of surface topography on condition of high speed milling and give an account of the corresponding simulation algorithm. From the article, we also get the influence law of microscopic geometric shape depending on different milling dosage, cutter geometrical parameters and eccentric quantity and get the significance conclusion to actual production.

APA, Harvard, Vancouver, ISO, and other styles

43

Liu, Li Juan, and Wen Ge Wu. "The HSM Cutters Management System Based on B/S." Advanced Materials Research 97-101 (March 2010): 3604–8. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3604.

Full text

Abstract:

As one of the advanced manufacturing technologies, high speed machining (HSM) is expected to be the inevitable trend of manufacturing industries. In our country, the relevant research on HSM starts later, the actual machining and experiment on the machining technology and the machining parameters of HSM are few, the reasonable machining parameters selection scheme and the appropriate cutter choice method are lack. In response, we established the HSM cutters management system based on B/S. The system can facilitate optimized HSM cutters management and improve cutting efficiency by analyzing the processing examples, collecting and analyzing parameters of HSM.

APA, Harvard, Vancouver, ISO, and other styles

44

Lefort-Sorlier, Elodie, Christophe Colin, and Alfazazi Dourfaye. "Gradation Process by Imbibition in WC-Co for Mining Tools Application." Advanced Materials Research 83-86 (December 2009): 810–17. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.810.

Full text

Abstract:

Continuous composition gradients of several millimetres were generated in commercial WC-Co cutters to improve their shock resistance. This important gradation was obtained in one-step by using the imbibition process. The effects of this thermal processing were analysed in terms of microhardness, cobalt concentration and WC grain size. A gradient of a 300 HV amplitude is measured in the 8 mm-height sample treated by the imbibition process in association with a boron-rich coating. This gradient was preserved after the HPHT (high pressure – high temperature) step used for the diamond table deposition on the WC-Co cutter. To our knowledge, such gradients have never before been reported and should certainly increase cutter service life.

APA, Harvard, Vancouver, ISO, and other styles

45

Jiang, Bin, Pei Yi Zhao, Yong Zhong Wang, and Yi Hang Fan. "Influence Characteristics of Cutting-Contact Stress on the Wear of Milling Cutter in High Speed Ball-End Milling Hardened Steel." Advanced Materials Research 500 (April 2012): 192–97. http://dx.doi.org/10.4028/www.scientific.net/amr.500.192.

Full text

Abstract:

Adopted the cutting-contact model of high speed ball-end milling hardened steel surfaces, researched distribution characteristics of cutting-contact stress; by researching the influence of the distribution of this stress on cutter wear, clarified the influence theory of milling pattern and cutting parameters on initial wear of milling cutter. By using the method of climbing, conventional milling alternating and changing cutting parameters, verified the influence of milling pattern and cutting parameters on initial wear pattern. The result showed that, initial wear mechanism of high speed milling hardened steel is an interaction of multiple wear mechanisms under the effect of friction and alternating pressure stress, by using conventional milling can significantly reduce concave curvature radius of hardened steel, the contact stress of blade area and front, rear flank, inhibit crushing and wear rate of the milling cutter surfaces. Under this condition, by increasing rotation speed and reducing the feed per blade, will further increase the strength of this effect, and achieve the purpose of reducing the initial wear, inhibiting the wear rate and extending the cutters life.

APA, Harvard, Vancouver, ISO, and other styles

46

Liao, Yunn Shiuan, and Chun Lin Huang. "An Approach to Improve Machined Surface Finish in Micro Milling." Advanced Materials Research 797 (September 2013): 649–54. http://dx.doi.org/10.4028/www.scientific.net/amr.797.649.

Full text

Abstract:

Micro milling has been known to behave quite differently from conventional macro milling. The effect of cutting speed on the machined surface roughness in micro milling of ductile materials was investigated in this paper. The micro flat end milling cutters of the diameters of 0.5 mm and 0.3 mm were taken to machine 6061 aluminum alloy and S20C low carbon steel. For comparison purpose, the cutter of the diameter of 10 mm was tested as well. It is found that the machined surface finish is closely related to the cutting speed. For a large size cutter, the roughness decreases with the increase of cutting speed as expected. But the decreasing trend is valid only up to a certain speed for the small diameter cutters. It is also noted that beyond this speed limit broken and powder type chips form easily. These chips will adhere to the machined surface and tool face and deteriorate machined surface as a result. Based on this finding, an approach by directing the cutting fluid to the cutting zone via high pressure air assistance is proposed. It is verified that the cutting force and its variation are greatly reduced, tool wear becomes less, and finish of the machined surface is significantly improved.

APA, Harvard, Vancouver, ISO, and other styles

47

Ji, Chun Hui, and Zhan Qiang Liu. "Aeroacoustic Performance Evaluation of Milling Cutters Based on the Flow Field on the Cutter Surface." Advanced Materials Research 188 (March 2011): 398–403. http://dx.doi.org/10.4028/www.scientific.net/amr.188.398.

Full text

Abstract:

Many workers all over the world suffer significant hearing loss as well as psychological and physical stress as a result of exposure to high levels of aeroacoustic noise. Dipole sources are the major noise sources in aeroacoustic noise generation in rotating face milling cutters. A noise model based on the Ffowcs Williams-Hawkings Equation is used to predict aeroacoustic noise; the noise predicted was 2.5dB less than the experimental observations. Flow field of cutter surface was numerically simulated by the resolution of the Navier-Stokes equations (CFD) and five zones on cutter surface were founded to be the important noise source. The broadband noise spreads over a broad range of frequencies and contributes significantly to overall noise, but the discrete noise at the rotational frequency is usually higher and more detrimental to the body.

APA, Harvard, Vancouver, ISO, and other styles

48

Filippov, A. V., and E. O. Filippova. "Parameters of Contact Interaction while Lathing with Straight-Edge and Radius Cutters." Applied Mechanics and Materials 770 (June 2015): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.770.283.

Full text

Abstract:

The article discusses contact interaction of the straight-edge or radius cutter with the workpiece. Parameters under investigation are as follows: geometry in a setting system, the cutting edge length and a cross section of the shear layer. The description of the main features of the straight-edge cutters is given. Characteristic curves of parameters under investigation are presented. Guidelines for choosing of cutting tools are offered on the basis of the data obtained.

APA, Harvard, Vancouver, ISO, and other styles

49

Song, Yan Hong, Zhe Kun Li, Yu Sheng Zou, Yong Kang Xu, and Yong Luo. "Study & Analysis of Cutting Tobacco Quality and the SD5 Working Conditions." Applied Mechanics and Materials 687-691 (November 2014): 472–75. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.472.

Full text

Abstract:

Feeding, moist, loose, remoisten, cutting and bake etc. are important processes and the cutting, which is one of the most important aspects of cigarette production, is one of key processes to determine the quality of cigarettes. In this paper, the principle SD508L Hob Cutter, mechanical motion and control are analyzed, and explained how to improve the quality and other issues in cutters for tobacco productions.

APA, Harvard, Vancouver, ISO, and other styles

50

Zhang, Guo Xing, Zhi Yong Hu, Shao Hua Qian, Zhi De Wang, and Yong Zhi Gong. "Grinding Cutter Design of Involute Straight Bevel Gear Based on Central Projection Method." Advanced Materials Research 271-273 (July 2011): 939–44. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.939.

Full text

Abstract:

In order to establish precise grinding cutter model of straight bevel gear, this study projects the spherical involute that forms tooth profile of bevel gear into the involute of circle approximately, and makes a simulation model database of bevel gear according to the principle of mechanical design on the basis of CAD mapping software. With the central projection method, processing devices and cutters of involute straight bevel gear can also be designed which has no concern with modulus. The results show that the establishment of simulation database and processing cutters can greatly facilitate the design and processing of straight bevel gear, greatly reduce the design and finishing costs, and is also helpful to teaching training of gear.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Cutler, Amy'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles