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Journal articles on the topic 'Geometry of the angle of inclination of the pressing (cutting) surface of the tool'
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1
V.I., Chernyshev, and Chigirinsky V.V. "OPTIMUM SHARPENING ANGLE FOR DRILLING TOOLS." ИННОВАЦИОННЫЕ НАУЧНЫЕ ИССЛЕДОВАНИЯ 2023. 2-1(26) (February 19, 2023): 36–49. https://doi.org/10.5281/zenodo.7654918.
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The article discusses a method for increasing the efficiency of rock cutting processes by mechanical means by optimizing the angles of inclination, sharpening of the drilling tool. Drilling tool fixtures and mechanisms used for drilling holes and wells. Drilling machines is a complex of drilling equipment or structures, units and devices intended for drilling holes and wells. The article investigates the influence of the geometry of the angle of inclination of the pressing (cutting) surface of the tool on penetration into the rock. Efficiency is determined by a decrease in the resistance to the penetration of tool blades into the rock. At present, the efficiency of penetration of the drilling tool is ensured by the rotational and shock-rotational forces of the drilling mechanism acting on the drilling tool.
2
Duc, Pham Minh, Le Hieu Giang, Mai Duc Dai, and Do Tien Sy. "An experimental study on the effect of tool geometry on tool wear and surface roughness in hard turning." Advances in Mechanical Engineering 12, no. 9 (2020): 168781402095988. http://dx.doi.org/10.1177/1687814020959885.
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The main purpose of this study is to investigate the influence of tool geometry (cutting edge angle, rake angle, and inclination angle) and to optimize tool wear and surface roughness in hard turning of AISI 1055 (52HRC) hardened steel by using TiN coated mixed ceramic inserts. The results show that the inclination angle is the major factor affecting the tool wear and the surface roughness in hard turning. With the increase in negative rake and inclination angles, the tool wear decreases, and the surface roughness increases. However, the surface roughness will decrease when the inclination angle increases to overpass a certain limit. This is a new and significant point in the research of the hard turning process. From this result, the large negative inclination angle (λ = −10°) should be applied to reduce the surface roughness and the tool wear simultaneously. With the optimal cutting tool angles in the research, the hard machining process is improved remarkably with decreases of surface roughness and tool wear 8.3% and 41.3%, respectively in comparison with the standard tool angles. And the proposed tool-post design approach brings an effective method to change the tool insert angles using standard tool-holders to improve hard or other difficult-to-cut materials turning quality.
3
Minh Duc, Pham, Le Hieu Giang, and Van Thuc Nguyen. "Analyzing Cutting Temperature in Hard-Turning Technique with Standard Inserts Through Both Simulation and Experimental Investigations." Applied Sciences 15, no. 2 (2025): 983. https://doi.org/10.3390/app15020983.
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The cutting temperature in hard turning is extremely high, which reduces tool life, lowers machined-surface quality, and affects dimensional control. However, hard turning differs greatly from conventional turning in that the cutting process mainly happens at the tool-nose radius due to the extremely shallow depth of the cut. This paper provides a comprehensive and systematic analysis of this issue based on an evaluation of tool geometry in hard turning via finite element analysis (FEA) simulations and experiments. The effect of tool angles on cutting temperature in hard turning is analyzed. The impacts of cutting-edge angle, rake angle, inclination angle, and average local rake angle on the cutting temperature are investigated via central composite design (CCD). The simulated results and the empirically measured cutting temperature exhibit comparable patterns, with a minor 2% difference. Increasing the cutting-edge angle, negative rake angle and negative inclination angle enhances the local negative rake angles of the cutting-edge elements at the tool-nose radius involved in the cutting process. Notably, the most important component influencing cutting temperature in hard turning is the inclination angle, as opposed to normal turning, where the rake angle dominates the heat generation. Following this is the cutting-edge angle and the rake angle, which each contribute 40.75%, 32.39%, and 7.03%. These findings could enhance the application of the hard-turning technique by improving tool life and surface quality by focusing on optimizing the inclination angle.
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Erzin, O. A., S. A. Vasin, and A. S. Klentak. "Analysis of changes in angular coordinates of cutting tools when conducting technological operations under different cutting conditions." iPolytech Journal 29, no. 1 (2025): 22–32. https://doi.org/10.21285/1814-3520-2025-1-22-32.
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This study aims to optimize cutting conditions by controlling the working angles of cutting tools when machining shaped surfaces and changing operating parameters of the cutting process for technological reasons. The study object includes cutting conditions for machining shaped surfaces, their influence on the operating parameters of the cutting process, the working angles of cutting tools (rake angle and lead angle), and cutting edge inclination. When developing mathematical models, we used methods of the theory of cutting, analytical mechanics, and thermodynamics. Static and kinematic geometry analysis of a blade in a cutting tool showed that changes in the angular coordinates of the front surface of a blade require the introduction of controlled rotation axes when conducting technological operations under different cutting conditions. These axes should control the main blade angles, i.e., lead angle, rake angle, and cutting edge inclination. With more than 85% of the tool penetration, the working angles considerably change even when its installation errors are relatively small. It is proposed to introduce controlled rotation axes of the front surface of a blade in a cutting tool by its main angles, i.e., lead angle, rake angle, and cutting edge inclination. It is shown that working angles considerably change even when its installation errors are relatively small. The study revealed that these angles constructively limit the regulation range of the rake angle of a cutting tool due to the impermissible reduction of the back relief angle; these angles should be taken into account when calculating the power characteristics of the cutting process. Thus, in order to solve the problem of stabilizing the working angles of cutting tools, new methods and technologies should be developed, which would make it possible to control kinematic parameters in the cutting process more accurately. It is important to take into account the influence of various factors such as workpiece material, cutting tool type, and cutting conditions.
5
Vyhovskyi, Heorhii, Nataliia Balytska, Mykola Plysak, and Valentyn Otamanskyi. "Influence of oblique geometry of cutting inserts of finishing face mills on cutting forces." Scientific journal of the Ternopil national technical university 108, no. 4 (2022): 54–63. http://dx.doi.org/10.33108/visnyk_tntu2022.04.054.
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The feasibility of using face milling for the final formation of the parts surface layer is confirmed by a large number of scientific works. At the same time, there are significant advantages of technological processes using face mills for oblique cutting, equipped with superhard materials, with a spiral-stepped arrangement of cutting inserts. This work is devoted to the study of the influence of the inclination angle of the oblique face mill cutting edge on the cutting forces when processing the workpiece flat surface made of gray cast iron and carbon tool steel using the Deform-3D program. The influence of the cutting edge inclination in the range from 0 to -45º on the smoothness of penetration of the face mill inserts into the workpiece is discussed.
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Qin, Yu Xia, Ji Hong Jia, Zhi Wei, Mei Lin Gu, Tong Hui Li, and Yu Tao Wang. "Ball End Milling of Glass with Inclined Cutter." Applied Mechanics and Materials 33 (October 2010): 195–99. http://dx.doi.org/10.4028/www.scientific.net/amm.33.195.
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This study deals with the effect of tool–surface inclination on cutting forces in ball end milling .Since glass undergoes almost no elastic deformation, the shape of the cutter in glass machining has a larger influence on surface finish than that of metal machining. Model of geometry and tilt tool milling process is established. A double helix micro-flute ball end mill made of cemented carbide is used in the groove milling tests with radius 0.5mm at a helix angle of 30°. The rotational axis of the tool is inclined to improve the surface finish. The cutting processes are modeled, and 3-direction cutting forces are measured via three groups of experiments to show the effect of the tool inclination on the machined surface. Several micro grooves, then, are machined with the crack-free surfaces to prove efficiency and surface quality in the milling process.
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Matras, Andrzej, and Wojciech Zębala. "Optimization of Cutting Data and Tool Inclination Angles During Hard Milling with CBN Tools, Based on Force Predictions and Surface Roughness Measurements." Materials 13, no. 5 (2020): 1109. http://dx.doi.org/10.3390/ma13051109.
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This work deals with technological considerations required to optimize the cutting data and tool path pattern for finishing the milling of free-form surfaces made of steel in a hardened state. In terms of technological considerations, factors such as feed rate, workpiece geometry, tool inclination angles (lead and tilt angles) and surface roughness are taken into account. The proposed method is based on calculations of the cutting force components and surface roughness measurements. A case study presented in the paper is based on the AISI H13 steel, with hardness 50 HRC and milling with a cubic boron nitride (CBN) tool. The results of the research showed that by modifications of the feed value based on the currently machined cross-sectional area, it is possible to control the cutting force components and surface roughness. During the process optimization, the 9% and 15% increase in the machining process efficiency and the required surface roughness were obtained according to the tool inclination angle and feed rate optimization procedure, respectively.
8
Abbasi, Sarwar Ali, Ping Fa Feng, Yuan Ma, X. C. Cai, Ding Wen Yu, and Zhi Jun Wu. "Finite Element Deformation Analysis of Long Thin Cantilever Shape Parts in High Speed Ball End Milling of Titanium Alloy Ti-6Al-4V with PCD Tools at Various Tool Inclination Angles." Key Engineering Materials 693 (May 2016): 1038–45. http://dx.doi.org/10.4028/www.scientific.net/kem.693.1038.
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In this study the influence of tool inclination angle on deformation of thin wall cantilever shape part has been analyzed using finite element numerical simulations. Polycrystalline diamond, PCD tool has been chosen as a tool material in this study because PCD tool has given better results in terms of surface roughness, tool life and productivity in end milling of titanium alloy Ti-6Al-4V. Firstly, in this study, the effect of tool inclination angle on tool contact geometry, cutting speed and cutting forces has been discussed. Then, finite element numerical simulations (FEM) have been carried out in AdvantEdge® for the prediction of cutting forces with PCD tool at four different tilt angles viz. 70°, 75°, 80° and 85° and the results have been compared to the coated carbide tool. Then the maximum magnitude of the forces which occurred in tangential direction (FY) were input in the Abaqus® software as a load acting on the thin long cantilever part and deformation results were analyzed. Results show that PCD tool due to its high hardness, strength and better wear resistance produce lower cutting forces at all angles studied and at an angle near the perpendicular to the surface being machined both tools have lower values of the deformation. The FEM simulation results match well with the theoretical study as theoretical analysis also shows that at angles nearer to perpendicular to the surface being machined, the tool will have lower effective cutting speed & forces and hence proved as the key to achieving better accuracies for long thin wall parts.
9
Vukelic, D., K. Simunovic, Z. Kanovic, et al. "Modelling surface roughness in finish turning as a function of cutting tool geometry using the response surface method, Gaussian process regression and decision tree regression." Advances in Production Engineering & Management 17, no. 3 (2022): 367–80. http://dx.doi.org/10.14743/apem2022.3.442.
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In this study, the modelling of arithmetical mean roughness after turning of C45 steel was performed. Four parameters of cutting tool geometry were varied, i.e.: corner radius r, approach angle κ, rake angle γ and inclination angle λ. After turning, the arithmetical mean roughness Ra was measured. The obtained values of Ra ranged from 0.13 μm to 4.39 μm. The results of the experiments showed that surface roughness improves with increasing corner radius, increasing approach angle, increasing rake angle, and decreasing inclination angle. Based on the experimental results, models were developed to predict the distribution of the arithmetical mean roughness using the response surface method (RSM), Gaussian process regression with two kernel functions, the sequential exponential function (GPR-SE) and Mattern (GPR-Mat), and decision tree regression (DTR). The maximum percentage errors of the developed models were 3.898 %, 1.192 %, 1.364 %, and 0.960 % for DTR, GPR-SE, GPR-Mat, and RSM, respectively. In the worst case, the maximum absolute errors were 0.106 μm, 0.017 μm, 0.019 μm, and 0.011 μm for DTR, GPR-SE, GPR-Mat, and RSM, respectively. The results and the obtained errors show that the developed models can be successfully used for surface roughness prediction.
10
Pervaiz, Salman, Sathish Kannan, Dehong Huo, and Ramulu Mamidala. "Ecofriendly inclined drilling of carbon fiber-reinforced polymers (CFRP)." International Journal of Advanced Manufacturing Technology 111, no. 7-8 (2020): 2127–53. http://dx.doi.org/10.1007/s00170-020-06203-y.
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Abstract Key composite made aerostructures such as fuselage inner walls, flap support fairings, empennage ribs, and the vertical fin ribs are comprised of non-vertical inclined and radial holes that join with other key metallic and non-metallic structures. Carbon fiber reinforced plastics (CFRP) are also used in the aerospace, automotive, marine, and sports-related applications due to their superior properties such as high strength to weight ratio, better fatigue, and high stiffness. CFRP drilling operation is different than the homogenous materials as the cutting-edge interacts with fiber and matrix simultaneously. Flank face of the tool rubs on the workpiece material and develops high frictional contact due to the elastic recovery of broken fibers. Lubrication during CFRP cutting can reduce the friction involved at tool-workpiece interface to enhance cutting performance. Dry cutting, cryogenic machining, and minimum quantity lubrication (MQL)-based strategies are termed as ecofriendly cooling/lubrication methods when machining high performance materials. The abrasive nature of carbon fiber is responsible of producing cutting forces which leads to different types of imperfections such as delamination, uncut fiber, fiber breakout, and fiber pullout. The integrity of CFRP drilled hole especially at the entry and exit of the hole plays a significant role towards the overall service life. The presented paper aims to characterize the interrelationships between hole inclination, lubrication/cooling methods, tool coating, and drill geometry with inclined hole bore surface quality and integrity during drilling of CFRP laminates. In dry cutting, thrust forces were found 2.38 times higher in the 30° inclination when compared with the reference 90° conventional inclination angle. Compressed air provided lowest increase (1.46 times) in the thrust forces for 30° inclination.
11
Weixler, Jodok, Marc Zweifel, Timo Schudeleit, Markus Bambach, and Konrad Wegener. "Laser Ablation Study of Cutting Ceramics with Consideration of the Beam Inclination Angle." Materials 16, no. 6 (2023): 2509. http://dx.doi.org/10.3390/ma16062509.
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Silicon alumina nitride (SiAlON) and alumina toughened zirconia (ATZ) ceramics are applied for ceramic cutting tools to machine, e.g., cast iron, nickel base alloys and other difficult-to-machine materials. The state of the art technology for manufacturing of the cutting tool geometry is grinding. Laser processing of ceramics is already studied in terms of ablation rate and roughness evaluation with the application of dental implant manufacturing. In the present study, laser machining of the mentioned ceramics is explored with a laser beam source of 1064 nm wavelength and 10 ps pulse duration (FWHM). The angle dependent energy specific removal rate is described in a model and the optimal pulse fluence for the different materials and the irradiation angles can be derived. For processing at irradiation angle of up to 75° no decrease of the relative absorption could be observed. For ATZ, lowest surface roughness is determined for both, orthogonal and quasi-tangential processing angle. For SiAlON, the roughness decreases constantly for higher tilt angles. A significant difference in the material answer with change of the sample composition can be detected and the results show the potential of further developing SiAlON ceramics towards machineability for laser ablation.
12
Bejjani, Roland, Charlie Salame, and Mikael Olsson. "An Experimental and Finite Element Approach for a Better Understanding of Ti-6Al-4V Behavior When Machining under Cryogenic Environment." Materials 14, no. 11 (2021): 2796. http://dx.doi.org/10.3390/ma14112796.
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Due to increasing demand in manufacturing industries, process optimization has become a major area of focus for researchers. This research optimizes the cryogenic machining of aerospace titanium alloy Ti-6Al-4V for industrial applications by studying the effect of varying the nozzle position using two parameters: the nozzle’s separation distance from the tool–chip interface and its inclination angle with respect to the tool rake face. A finite element model (FEM) and computational fluid dynamics (CFD) model are used to simulate the cryogenic impingement of cryogenic carbon dioxide on the tool–workpiece geometry. Experiments are conducted to evaluate cutting forces, tool wear, and surface roughness of the workpiece, and the results are related to the CFD and FEM analyses. The nozzle location is shown to have a significant impact on the cutting temperatures and forces, reducing them by up to 45% and 46%, respectively, while the dominant parameter affecting the results is shown to be the separation distance. Cryogenic machining is shown to decrease adhesion-diffusion wear as well as macroscopic brittle chipping of the cutting insert compared to dry turning, while the workpiece surface roughness is found to decrease by 44% in the case of cryogenic machining.
13
Lin, Z.-C., and Y.-Y. Lin. "Elastic-plastic finite element analysis for oblique cutting with a discontinuous chip of 6-4 brass." Journal of Strain Analysis for Engineering Design 36, no. 6 (2001): 579–94. http://dx.doi.org/10.1243/0309324011514728.
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If the workpiece material experiences tremendous strain during the chip formation process or brittle material undergoes fracture in the primary deformation zone when the chip is only partly formed, the segmented chip formed under the above conditions is called a discontinuous chip. With the introduction of the tool inclination angle geometry, an elastic-plastic finite element model is developed for oblique cutting of discontinuous chip. The tool is P20 while the workpiece is made of 6-4 brass. The initial crack location, the direction of crack growth and variations of discrete chips are examined under the condition of a low cutting speed. These predictions are made possible by application of the strain energy density theory. The initial crack was formed in the (d W/d V)maxmin region (i.e. the maximum region among many of the strain energy density minima) of the chip surface and grew progressively along the stationary values of the strain energy density function. The direction of crack growth was based on the maximum strain energy density curve along the surface. The fracture process on the other chip layers was identical with that on the chip surface and occurred in sequence until it reached the chip free surface. The plastic deformation and friction result in a high equivalent stress on the chip surface above the tool tip, especially at the place of crack formation. As more residual stress is present after cutting, degradation of the workpiece prevails and should be accounted for.
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Tanaka, Hidetake, and Toma Yoshita. "Machinability Evaluation of Inclined Planetary Motion Milling System for Difficult-to-Cut Materials." Key Engineering Materials 656-657 (July 2015): 320–27. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.320.
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CFRP and Titanium alloy, which are known as difficult-to-cut materials have been widely used as structural material in aviation industries. The orbital drilling is one of an effective drilling technique for the industries. However this technique has some disadvantages such as increase of cutting force due to cutting with tool center point, inertial vibration generated by revolution and high installation cost. In order to improve the disadvantages, we have invented a new drilling technique which is called inclined planetary motion milling. The inclined planetary motion milling and the planetary mechanism drilling has two axes of cutting tool rotation axis and revolution axis. Cutting tool rotation axis of the orbital drilling is moved parallel to the revolution axis in eccentric. On the other hand, in the case of the inclined planetary motion milling, eccentric of the cutting tool rotation axis is realized by inclination of a few degrees from the revolution axis. Therefore, the movement of eccentric mechanism can be reduced by comparison with the orbital drilling because inclined angle is smaller than eccentricity of the cutting tool tip. As a result, eccentric mechanism can be downsized and inertial vibration is reduced. In the study, a geometrical cutting model of inclined planetary motion milling was set up. The theoretical surface roughness of the inside of drilled holes by use of two types cutting tool geometry were calculated based on the model. And cutting experiments using the new prototype for CFRP were carried out in order to evaluate the effect on machinability with change of cutting point atmosphere. In addition, optimal cutting condition was derived according to cutting experiments for titanium alloys utilizing the orthogonal array.
15
Maiboroda, Viktor Stanislavovych, Ivanna Valentynivna Slobodianiuk, Dmytro Yuriyovych Dzhulii, and Yuriy Josipovych Besarabets. "SPECIFIC FEATURES OF MAGNETO-ABRASIVE MACHINING OF CARBIDE TOOLS WITH PROTECTIVE CHAMFERS ON THE CUTTING EDGES." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 1 (July 28, 2022): 66–73. http://dx.doi.org/10.20998/2079-004x.2022.1(5).09.
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To ensure the durability and working ability of cutting tools, especially carbide, it is promising to form a rational microgeometry of working surfaces, in particular, the shape and geometry of cutting edges, as well as their hardening. For this, it is necessary to carry out additional machining of the tool after its sharpening operation. The magneto-abrasive machining method in conditions of large working gaps with a rational ratio of the impact and frictional interaction of the magneto-abrasive tool with the machined elements makes it possible to form microgeometry and strengthen both the cutting edges and the working surfaces. To ensure effective machining, it is necessary to determine the regularities of forming the microgeometry of the cutting edges with pre-made protective chamfers. The paper presents the results of a complex study of the magneto-abrasive machining process of carbide not sharpened inserts with protective chamfers on the cutting edges made at different angles. It was shown that the process of edge rounding is linearly related to the duration of magneto-abrasive machining. Moreover, the rate of increase in the size of the radius of cutting edges rounding with protective chamfers increases linearly with an increase in the angle of inclination of the chamfers, all other process conditions being equal. The physical description of the hardening mechanism of the surface layer of the working elements of the carbide cutting tool was proposed. It was shown that the hardening process is associated with the rational imposition of forces arising as a result of the frictional and impact interaction of the particles and the formations of the magneto-abrasive tool with the machined surfaces. It was found that the nature of the change in surface hardness obtained after magneto-abrasive machining on the protective chamfers has the wavy shape depending on the time of the process. The greatest increase in surface hardness takes place on chamfers made at angles of 10 ° and 20 ° and is explained by the value of the ratio between the forces of normal and tangential origin arising from the contact of the magneto-abrasive tool with the machined surfaces.
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Pivkin, Petr, Vladimir Grechishnikov, Artem Ershov, Vladimir Kuptsov, and Xiaohui Jiang. "Determination of Rational Design and Geometric Parameters of a High-Performance Drill Based on a Mathematical Model of the Cutting Part." EPJ Web of Conferences 248 (2021): 04011. http://dx.doi.org/10.1051/epjconf/202124804011.
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Processing of high-precision holes in one technological operation is an urgent problem of advanced manufacturing. Processing of precise holes in parts for aerospace and machine-building industries with a diameter of up to 30 mm is performed during countersinking, deployment or grinding operations. These operations are applied only if there already exists a pre-treated hole. Monolithic three-fluted drills have been becoming common for processing high-precision holes of 7-8 quality over the last few years. The processing of various types of materials such as stainless steels, cast iron and heat-resistant steels requires rational geometric and structural parameters of the cutting tool. The nature of the load distribution between all the teeth during drilling plays a huge role in the processing efficiency. Even load distribution between the three teeth and a positive geometry improves self-centering and reduces the deviation from the specified axis of the hole. The drill sharpening provides positive geometry along the entire main cutting edge. The influence of the geometric parameters of the cutting edge of the screw groove on the shape of the drill bit is equally important. Existing approaches to the design of the thinning do not account for the influence of the geometric parameters of the cutting edge on the section of the screw groove. Analytical approaches to modelling of the main cutting edges are typically married with difficulties associated with achieving a smooth change in the angle of inclination to the tangent of the cutting edge. The complexity of the aforementioned task is largely due to the presence of critical points at the interface of the spiral groove and thinning. Determining the rational shape of two sections of the main cutting edge performed in this study is a complicated task that includes several steps needed to find the number of nodal points. Achieving a positive rake angle in the normal section to the cutting edge at the gash area that was formed via a special sharpening is one of the most important results of this paper. The rational shape of the cutting edge and the front surface provides an increase in the strength of the cutting part by 1.3 times.
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Pavlenko, Ivan, Maksym Hodunko, and Oleg Kyslun. "Research Motor Capabilities of the Executive Authority (MP) PKM When Making Cross Motion Angle." Central Ukrainian Scientific Bulletin. Technical Sciences, no. 3(34) (October 2020): 117–29. http://dx.doi.org/10.32515/2664-262x.2020.3(34).117-129.
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For the manufacture of parts of complex shapes, it becomes necessary to move the cutting tool along the line at a certain angle. For this, machines equipped with mechanisms of parallel structure are used. Only a study of the movable capabilities of these mechanisms makes it possible to introduce them into production. The studies focus on the transverse movement of the center of the moving platform of the parallel structure mechanism for a hexapod machine, as a material point moving along a line depending on the angle of contact of the tool and the perpendicular to the plane of the work surface (axis of symmetry of the mechanism). To determine the possible positions of the center of the moving platform, we consider a generalized scheme of the parallel structure mechanism. Given the restrictions on movement, the area of possible positions is divided into zones: Zrp - without a cutting tool; Zri - the zone of positions of the top of the instrument. The part that is being processed is installed on the technological device, which is placed on the basis of a parallel structure mechanism. Parameters of a machine with a parallel structure mechanism: a, b - distance between the supports of the stationary carrier system and the executive body, respectively; Lmax is the maximum length of the kinematic links; lmin is the minimum length of the kinematic links; li is the current length of the kinematic links; l is the magnitude of the transverse movement; φ is the angle of inclination of the executive body; hi is the current position of the executive body of the mechanism of the parallel structure in height. The assessment of motor capabilities is determined by the displacement index, which is the ratio of the actual displacement value l to the theoretically possible one (taken equal to the maximum rod length Lmax). From the above dependencies it is seen that the influence of the motor capabilities of the rods on the relative displacement provides an increase in the displacement index in the indicator section from 0.45 to 0.65, then the section that is affected by the slope of the displacement line, with a decrease in which the displacement in the area of0.8 up to 1 movement decreases again, this is due to the complex geometry of the service area ofthe working space of the machine with a parallel structure mechanism. On the effect of the ratio of the sizes of the movable to the fixed platform on the relative displacement, we have that with an increase in the indicator, the initial indicator of the relative displacement also increases, with a value of the exponent n starting from 0.6 its value decreases in all cases. The influence of the ratio of the maximum displacement of the rods to the size of the fixed platform, on the relative displacement has the opposite of the previous character. With an increase in the indicator m, the relative displacement indicator increases, with a further increase in the indicator m, it can be seen that significantly decreases the displacement indicator and with a value less than 0.6.
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Sonawane, Harshad A., and Suhas S. Joshi. "Analytical Modeling of Chip Geometry in High-Speed Ball-End Milling on Inclined Inconel-718 Workpieces." Journal of Manufacturing Science and Engineering 137, no. 1 (2015). http://dx.doi.org/10.1115/1.4028635.
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Most often contoured surfaces inclined at several inclinations are generated using ball-end milling of aerospace and automobile components. It is understood that the chip morphology and the corresponding cutting mechanisms change with a change in the tool-workpiece interactions on inclined surfaces. Analytical predictive models to accurately evaluate the undeformed and deformed geometries of chip in ball-end milling are not available. Therefore, this work presents development of analytical models to predict the cutting tool-workpiece interaction as the workpiece inclination changes, in terms of undeformed and deformed chip cross sections. The models further evaluate instantaneous shear angle along any cross section of the tool-work interaction on a ball-end cutter in a milling operation. The models illustrate evaluation of a chip segment and mechanism of its formation in ball-end milling on an inclined work surface. It is observed that the chip dimensions, except deformed chip thickness, increase with an increase in the workpiece inclination angle. Also, a higher workpiece inclination results into an easy flow of the deformed chip over the cutting tool flank, which leads to a higher shear angle during the cut. The predictive chip geometry models corroborate 90% to the experimental results obtained at various workpiece inclinations.
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Vu, Thi-Nhai, Van-Trung Pham, and Te-Hua Fang. "Material deformation mechanism of lamellar twined high–entropy alloys during machining." Modelling and Simulation in Materials Science and Engineering, February 2, 2024. http://dx.doi.org/10.1088/1361-651x/ad2541.
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Abstract The effects of sample structure and tool geometry are studied under cutting simulation to verify the deformation, removal mechanisms, and subsurface defection of lamellar twined CoCuFeNiPd alloys. These findings suggest that the twin boundary spacing and twin inclination angle (β) are the main determinants of surface wear characteristics and cutting-induced surface harm. The maximum cutting force achieved with TBS = 8a and β =900. The high friction coefficient with the sample has TBS = 8a and β = 900, showing that the tool's moving in the substrate is strongly restricted. Furthermore, the surface topography is not sensitive to the TBS and β. The best-machined surface is achieved with TBS = 3a and 4a under twin inclinations of 0 and 300. The effect of edge radius (R), rake angle (γ), and clearance angle (α) on the deformation behavior is examined. The negative of γ, small α, or larger R results in a higher cutting force, a worse subsurface, and a lower cutting pile-up height. With a positive γ, a large α or small R has a larger average friction coefficient, which implies a higher resistance rate. The tool with a smaller R or positive γ can improve the machined surface's smoothness.
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JURGA, TIBOR, IVAN MRKVICA, and ANETA SLANINKOVA. "COMPUTER SUPPORT FOR THE DESIGN OF THE HOB CUTTER." MM Science Journal 2024, no. 2 (2024). http://dx.doi.org/10.17973/mmsj.2024_03_2023139.
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The aim of the work is to create a computer program in the 3D CAD system T Flex CAD allowing the creation of parametric models for the design and construction of a modular hob cutter for the selected gearing. The thesis includes the analysis of the problem of hob cutters for the production of spur gearing with an involute profile, the analysis of the initial surface and the shape of the tool cutting edge for the involute surface, the determination of the basic profile of the cutting edge of the hob cutter (geometry of the basic worm, geometry of the cutting edge) and the calculation of the design parameters of the tool. The individual calculations will be programmed in the 3D CAD system T Flex CAD, which will allow to generate a specific 3D model of the hob cutter based on the change of input requirements for the production of a given spur gear (module, engagement angle, tooth inclination angle), with the possibility of displaying the required tool in a 2D view in its base, normal and side planes, which will be in the form of a standard technical drawing. This paper presents the preparation (unification calculations, introduction) before the final version of the computer program for the creation of the parametric tool models.