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Journal articles on the topic 'Spindle head'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Horiuchi, Osamu, Mitsuyoshi Nomura, Bo Xiao Ma, Takayuki Shibata, Yoshihiko Murakami, and Masami Masuda. "Influence of Thermal Behavior of Spindle on Machining Accuracy in Micro-Endmilling." Advanced Materials Research 418-420 (December 2011): 2040–45. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2040.

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This paper describes on the influence of thermal behavior of spindle on machining accuracy in micro-endmilling. In order to make clear the reasons why the depth of slot varies during slotting repeated, temperatures around the spindle head and the thermal expansion of spindle axis were investigated. The machine tool used for experiment was a small type of vertical machining center. The spindle used for experiment was a ball bearing spindle which rotated at 10000-40000 min-1. The spindle head made of aluminum alloy had various cooling systems for spindle motor and ball bearings, and the temperat

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2

Ma, Shi Ming, Li Gang Cai, Yong Sheng Zhao, Zhi Feng Liu, Tie Neng Guo, and Qiang Cheng. "Analytical Modeling of the Spindle Shaft of Heavy Load Deflection Angle Milling Head Dynamics Using Timoshenko Beam Model." Advanced Materials Research 443-444 (January 2012): 823–29. http://dx.doi.org/10.4028/www.scientific.net/amr.443-444.823.

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The spindle shaft of heavy load deflection angle milling head is an important functional component of 5-axis CNC machine tool, which has characteristics of high torque and high power, used for large and complex free-form surface processing. The spindle shaft is modeled as Timoshenko’s beam by including the centrifugal force and gyroscopic effects. The effects on inherent characteristic of the spindle shaft of heavy load deflection angle milling head are analyzed owing to axial force and spindle shaft speed. Simultaneously, numerical solution of spindle shaft is gotten. And, the numerical resul

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3

Guschinskaya, Olga, and Alexandre Dolgui. "A Transfer Line Balancing Problem by Heuristic Methods: Industrial Case Studies." Decision Making in Manufacturing and Services 2, no. 2 (2008): 33–46. http://dx.doi.org/10.7494/dmms.2008.2.2.33.

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The paper deals with the problem of optimal configuration of a type of transfer lines which are equipped with transfer machines. Such machines perform operations with standard modular spindle heads which are activated sequentially. All operations assigned to the same spindle head (block of operations) are executed simultaneously by a set of tools fixed at the spindle head. The quantity of machines and spindle heads used to produce a part with the given productivity rate defines the final cost of the transfer line which must be minimized. To minimize this cost, a combinatorial problem of operat

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4

Wu, Huai Chao, Shi Tao Chen, Yong Yong He, and Hui Juan Zhang. "Design and Finite Element Analysis of Liquid Sliding Bearing and the Matching Spindle of High-Speed Roller Grinding Head." Applied Mechanics and Materials 278-280 (January 2013): 290–94. http://dx.doi.org/10.4028/www.scientific.net/amm.278-280.290.

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Through analyzing the design methods of liquid sliding bearing and the matching spindle of common roller grinding head, the design methods and ideas of liquid sliding bearing and the matching spindle of high-speed roller grinding head are put forward, and on these bases, a kind of liquid sliding bearing and the matching spindle of high-speed roller grinding head are designed. By means of finite element analysis of the bearing and the matching spindle respectively, it can be known that thermal property of the designed liquid sliding bearing can meet the working demands of high-speed roller grin

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5

Chen, Shao Hsien, Chin Mou Hsu, Kuo Lin Chiu, and Chu Peng Chan. "Research on High Performance Direct-Driving Motor Applied to Swivel Spindle Head." Applied Mechanics and Materials 701-702 (December 2014): 874–78. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.874.

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Swivel spindle head is a key component used in five-axis machine tool of high performance and is of great importance in application and design. Nowadays, more and more components are manufactured by high performance multi-axis CNC machine tools, such as components of spaceflight, renewable energy and automobile, etc. Therefore, high performance machine tools of multiple axes are more and more urgently demanded, while Swivel spindle head is one of the most important components for a multi-axis machine tool. Hence, Swivel spindle head is one of the key to developers multi-axis machine tool . The

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6

Cao, Jin Ling, and Ying Luo. "Dynamic Analysis in Grinding Head of Roller Grinding Machine." Advanced Materials Research 694-697 (May 2013): 259–62. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.259.

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In the article, the vibration resistance of spindle system in grinding head of roller grinding machine is studied by means of harmonic response and modal analysis, by using the method of the transfer matrix, obtained the first five orders of the natural frequency of spindle system. By studying the M84100A type spindle system in grinding head of roller grinding machine, obtained the conclusion that the natural frequency was far from the work frequency, so laid a foundation of the spindle system dynamic design.

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7

Chen, Shao Hsien, Chin Mou Hsu, Kuo Lin Chiu, and Chu Peng Chan. "The Impact of Different Direct-Driving Motor Design on Swivel Spindle Head." Applied Mechanics and Materials 789-790 (September 2015): 791–94. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.791.

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Swivel spindle head is a key component used in gantry type five-axis machine tool of high performance and is of great importance in its application and design. Nowadays, more and more components are manufactured by high precision CNC machine tools, such as components of spaceflight, renewable energy and automobile, etc. Therefore, high precision machine tools of multiple axes are more and more urgently demanded, while dual axis rotary head is one of the most important components for a multi-axis machine tool. Hence, it will be a key to develop dual axis spindle head that meets high precision n

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8

Han, Jian, Li Ping Wang, and Lian Qing Yu. "Modeling and Estimating Thermal Error in Precision Machine Spindles." Applied Mechanics and Materials 34-35 (October 2010): 507–11. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.507.

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Thermal induced errors are significant factors that affect machine tool accuracy. The deformation of spindle is the main contributor to thermal error. In this paper, the thermal characteristics of the spindle system are investigated. Taking into account the coupling of elastic deformation and temperature, the heat conduction of the spindle system is modeled. The heat of bearings and heat transfer coefficient, and boundary conditions of the spindle are determined. Based on the numerical results, an iterative model of spindle's temperature and thermal deformation are acquired under the actions o

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9

Sun, Hai Ming, Jing Jin, and Bai Lin Ren. "Precision Lifetime Analysis and Grey Prediction Based on Observation Data for Motorized Spindle." Applied Mechanics and Materials 421 (September 2013): 81–87. http://dx.doi.org/10.4028/www.scientific.net/amm.421.81.

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The stoppage and lifetime of high speed motorized spindle was related to many influence. A total of 31 statistical lifetime data of imported motorized spindles in cylinder head production line were presented, according to these data, and the average cut operation lifetime could reach 8277 hours, and the 8000 hours of average design precision lifetime was validated. It was found that the main influencing factors of motorized spindle lifetime in initial stage were the original manufacturing defects, also in precision lifetime stage and fatigue lifetime stage, the main influencing factors were th

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10

Shen, Yifeng, Tengfei Tang, and Hanliang Fang. "Geometric Modeling and Error Propagation Analysis of an Over-Constrained Spindle Head with Kinematic Interactions." Machines 12, no. 9 (2024): 651. http://dx.doi.org/10.3390/machines12090651.

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This study presents a comprehensive geometric modeling and error propagation analysis for a 3-degrees-of-freedom spindle head, focusing on an over-constrained parallel mechanism. Four geometric error models are established for the over-constrained spindle head, each considering different combinations of constraint wrenches. A set of sensitivity indices is formulated to evaluate the effectiveness of these models. Comparative sensitivity analysis suggests that a model incorporating all constraint wrenches is suitable for error propagation analysis. Two error propagation indices are introduced to

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11

Suryaningrat, Albertus Rianto, Nasril, Marsetiayu Ningsih, and Yanyan Nurhidayat. "Spindle Thermal Evaluation Thermal on Realiability Test of Numerical Controlled Lathe." Majalah Ilmiah Pengkajian Industri 13, no. 2 (2019): 121–28. http://dx.doi.org/10.29122/mipi.v13i2.3150.

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In the process of designing and manufacturing of CNC machine tools, reliability testing is needed to determine the reliability of the main component design and sub assembly. The precision of machine tools is greatly influenced by the temperature generated when the machine tool operates, both which arise from friction and overload.Evaluation of spindle axis errors caused by thermal distortion of the spindle bearing is based on ISO 230-3: 2007, ISO 10791-10: 2001 and ISO 13041-8: 2004. Temperature measurement at several measuring points on the spindle head to determine the increase in temperatur

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12

Shoumarova, M., T. Abdillayev, and Sh A. Yusupov. "Stabilizer for reversing vertical spindles in the drum removal area of cotton-picking apparatus." IOP Conference Series: Earth and Environmental Science 1231, no. 1 (2023): 012006. http://dx.doi.org/10.1088/1755-1315/1231/1/012006.

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Abstract The main indicator of the quality of the cotton harvesting machine is the completeness of collecting the grown crop into the bin, which is usually 3-4% lower than the completeness of collecting spindles. This is because the remover of vertical-spindle machines does not fully remove the cotton bobbins from the spindles. Part of the cotton wound on the spindle is carried away into the working zone without being removed. This phenomenon is called “cotton carry-over”. According to previous authors, “Carry-over” reaches 3-4% of the spindle collection completeness. This happens because the

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13

Balaniuk, A., A. Orgiyan, H. Oborskyi, V. Kolesnik, and R. Matzey. "MEANS OF INCREASING THE DYNAMIC QUALITY OF FINISHING AND BORING MACHINES." Odes’kyi Politechnichnyi Universytet Pratsi 1, no. 69 (2024): 5–15. http://dx.doi.org/10.15276/opu.1.69.2024.01.

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The article presents the design features of a number of spindle heads that ensure high accuracy of precision finishing and boring machines. The article describes the characteristics of the heads, spindle support devices, which increase the overall rigidity and damping of the spindle-bearing system. The basic designs of spindle heads, the relationships between design parameters are presented, and an analysis of their designs is also performed. Based on the processing of oscillograms of damped oscillations, the dependence of the logarithmic decrement of oscillations on their level was studied. B

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14

Sun, Yunfeng, Caterina Fede, Xiaoxiao Zhao, Alessandra Del Felice, Carmelo Pirri, and Carla Stecco. "Quantity and Distribution of Muscle Spindles in Animal and Human Muscles." International Journal of Molecular Sciences 25, no. 13 (2024): 7320. http://dx.doi.org/10.3390/ijms25137320.

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Muscle spindles have unique anatomical characteristics that can be directly affected by the surrounding tissues under physiological and pathological conditions. Understanding their spatial distribution and density in different muscles is imperative to unravel the complexity of motor function. In the present study, the distribution and number/density of muscle spindles in human and animal muscles were reviewed. We identified 56 articles focusing on muscle spindle distribution; 13 articles focused on human muscles and 43 focused on animal muscles. The results demonstrate that spindles are locate

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15

Van Thuy, Tran, and Huu Loc Nguyen. "Investigation on influence of cutting parameters on spindle vibration of CNC wood milling machine." MATEC Web of Conferences 213 (2018): 01007. http://dx.doi.org/10.1051/matecconf/201821301007.

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In machining operation, the cutting parameters greatly influences on the spindle vibration of a CNC wood milling machine. The paper presents the effect of the cutting parameters such as feed rate, cutting speed, and cutting depth on the vibration amplitude of the spindle when machined on CNC milling machine using Box-Hunter method of experimentation. The lowest natural frequency of this machine is 250 Hz. Experimental results have established a second-order regression equation that demonstrates the effect of three parameters such as feed rate, cutting speed, and cutting depth on the vibration

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16

Li, X. M., Y. F. Tong, and An Feng Hui. "Dynamic Simulation of the Assembly Process of Spindle Box of Machine Tool." Key Engineering Materials 455 (December 2010): 503–6. http://dx.doi.org/10.4028/www.scientific.net/kem.455.503.

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Based on the analyzed transmission process of spindle head and combined with the analyzed assembly process of spindle box, it determined the relationships of transmission and assembly between the various components of the spindle head. Firstly, using software of computer-aided design (UG6), it established a 3D parts library of spindle box of machine tool. Secondly, we had been developed dynamic simulation and power transmission simulation software of the assembly process of the spindle box of machine tool. It could realistically reproduce the disassembly process and the power transmission proc

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17

Liu, Qi. "Development and application of power head for CBM vehicle mounted drilling rig." E3S Web of Conferences 573 (2024): 02018. http://dx.doi.org/10.1051/e3sconf/202457302018.

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In order to meet the construction needs of surface coalbed methane extraction holes, cable holes, and mine surface rescue holes, a multifunctional power head suitable for coalbed methane vehicle mounted drilling rigs has been developed. The power head adopts a dual speed hydraulic motor to drive the spindle rotation through a first gear reduction, with a compact structure, high transmission efficiency, large spindle diameter, wide range of speed and torque adjustment, and spindle braking function. It can be applied to various drilling processes such as air down the hole hammer, air lift revers

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18

Ito, Hiroyuki, Shin-ichiro Hiraiwa, Tomoko Sugiyama, et al. "An Autopsy Case of Anaplastic Pancreatic Ductal Carcinoma (Spindle Cell Type) Multiple Onset in the Pancreas." Case Reports in Oncology 12, no. 1 (2019): 332–38. http://dx.doi.org/10.1159/000499969.

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This is a case of a 75-year-old man who was diagnosed with anaplastic pancreatic ductal carcinoma (spindle cell type). His image findings showed pancreatic head cysts and pancreatic head, body, and tail tumors respectively. EUS-FNA was performed to the pancreatic head and pancreatic body tumors, and the same high atypical type cells suspected of cancer were obtained from either specimen, and finally total pancreatectomy was performed. On the specimen, there were 4 lesions in the pancreas; histology showed that the same anaplastic pancreatic ductal carcinoma (spindle cell type) was obtained fro

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19

Cao, Jin Ling, and Ying Luo. "The Analysis of Static and Dynamic Characteristic in Grinding Head of Roller Machine." Advanced Materials Research 690-693 (May 2013): 2509–13. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.2509.

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On the basis of the establishment of the three-dimensional solid model of the roll grinder grinding head spindle system, carry out finite element static analysis, with the spindle structural stress and strain diagram, study its static characteristics, carry out modal analysis in the properly simplified spindle system with the finite element method, analyze the calculated natural frequency value , study dynamic characteristics of the spindle system, realized the dynamic design of the product.

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20

Tran, Van Thuy, Huu Loc Nguyen, and Hoang Hiep Nguyen. "Analysis and Experimental Design of Damper System and Cutting Parameters of CNC Router." Applied Mechanics and Materials 894 (September 2019): 82–89. http://dx.doi.org/10.4028/www.scientific.net/amm.894.82.

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. An understanding of the dynamic characteristics of a CNC machine is a vital element in the control of the machine which has a direct effect on the machining precision. The ways in which energy is dissipated, such as friction and damping, have a significant effect on the dynamic behavior and spindle vibration of a CNC machine. The paper presents kinetic analysis of the CNC machine damper system, effect of the damper and the cutting parameters such as feed rate, cutting speed, and cutting depth on the dynamic behavior and spindle vibration of a CNC machine. Experimental results have establishe

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21

Stepanov, Mykhailo, Petro Litovchenko, Larysa Ivanova, and Maryna Ivanova. "STUDY OF THE INFLUENCE OF THE WORKING LIQUID TEMPERATURE IN THE SPINDLE BEARINGS OF A CYLINDRICAL GRINDING MACHINE ON THE ERRORS OF ITS POSITION RELATIVE TO THE PART BEING MACHINED." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 2 (October 2, 2022): 49–55. http://dx.doi.org/10.20998/2079-004x.2022.2(6).07.

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The article presents the results of measurements of the ambient temperature around the working cylindrical grinding machines during the working day. The analysis of the behavior of the grinding head spindle of different cylindrical grinding machines during the work shift is performed, namely the results of experimental studies of the displacement of the front and rear ends of the grinding head spindle of cylindrical grinding machines are presented. The analysis of influence of temperature of working fluids in spindle bearings on its displacement is carried out. Possible changes in the geometri

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22

Rodionov, V. I., V. I. Gelfand, and G. G. Borisy. "Kinesin-like molecules involved in spindle formation." Journal of Cell Science 106, no. 4 (1993): 1179–88. http://dx.doi.org/10.1242/jcs.106.4.1179.

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To study the possible involvement of kinesin-like molecules in mitosis a polyclonal antibody against the head domain of Drosophila kinesin heavy chain (HD antibody) was microinjected into PtK1 cells at the prophase-prometaphase transition. Progress of the cell through mitosis was recorded for subsequent detailed analysis. Cells injected with pre-immune IgG progressed through mitosis at rates similar to those for noninjected cells. After HD antibody injections, chromosomes failed to congress to an equatorial plane and cells failed to form a bipolar spindle. Rather, the spindle poles came togeth

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Butool, Syeda Asiya, Ankit Natani, Betina Chandolia, and Manas Bajpai. "Oral Spindle Cell Carcinoma –Diagnosis Based on Immunohistochemical Interpretation." National Journal of Health Sciences 5, no. 3 (2021): 133–35. http://dx.doi.org/10.21089/njhs.53.0133.

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Abstract Spindle Cell Carcinoma (SpCC) is a biphasic tumor. They are proven to be monoclonal dedifferentiated forms of conventional squamous carcinomas. It is a rare tumor which is infrequently observed in head, neck and in the aerodigestive tract. The tumor is aggressive and shows high frequency of recurrence and metastasis. It is an aggressive variant of squamous cell carcinoma which resembles a true sarcoma. It is a proliferation of spindle cells and squamous cells. For confirmation of diagnosis, immunohistochemistry is used. A Rare case of spindle cell squamous cell carcinoma in a 61 years

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Lin, Xiaoliang, Yueyang Li, Weihai Song, and Xin Liu. "Application and Key Research Technology of Angle Head." Journal of Physics: Conference Series 2187, no. 1 (2022): 012029. http://dx.doi.org/10.1088/1742-6596/2187/1/012029.

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Abstract Angle head is a kind of machine tool accessory. After the angle head is installed on the machine tool, the rotation center line of the tool can be angled with the spindle rotation center line to process the workpiece. It has been widely used in various fields of machining such as aerospace, automobile, engineering machinery, etc. The use of an angle head can increase the processing range and adaptability of the machine tool, enable some processing that is difficult to complete with traditional methods, and reduce the repeated clamping of the workpiece, and improve the processing accur

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25

Zheng, Jian Xin, Jian Jun Jiang, and Chuan Shao Liu. "Experimental Study on Optimizing Process Parameters in Two-Dimensional Ultrasonic Rolled Extrusion." Applied Mechanics and Materials 37-38 (November 2010): 435–38. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.435.

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Two-dimensional ultrasonic vibration was introduced into common rolled extrusion, effect of the process parameters including tool head radius, feed speed, preload and spindle speed on the 45 steel shaft surface roughness were analyzed through orthogonal experiments. Experimental results show that lower value of surface roughness may be obtained in the process of two-dimensional ultrasonic rolled extrusion than that of common rolled extrusion, and the influence order of process parameters on surface roughness is feed speed, spindle speed, preload and tool head radius; the influence curves of to

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26

Li, De Guang, Shu Qin Liu, and Bin Bian. "Automatic Thermal Expansion Compensation of the Precise Grinding Machine AMB Spindle." Applied Mechanics and Materials 130-134 (October 2011): 3221–24. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.3221.

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Thermal expansion of the magnetic bearings in the process of precise grinding will lead to the posture drift of the grinding head, which can seriously affect the precision of the grinding. In this paper, the module of the relationship between temperature rise and the spindle posture is established, and the relationship between the controller’s five reference inputs and the spindle posture is ascertained. The controller’s five reference inputs are corrected according to the sample value of the temperatures in the system, so the inline adjustment of the grinding head posture and the automatic th

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27

Wang, Liping, Mengyu Li, and Guang Yu. "A Novel Error Sensitivity Analysis Method for a Parallel Spindle Head." Robotics 12, no. 5 (2023): 129. http://dx.doi.org/10.3390/robotics12050129.

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Geometric errors are the main factors affecting the output accuracy of the parallel spindle head, and it is necessary to perform a sensitivity analysis to extract the critical geometric errors. The traditional sensitivity analysis method analyzes the output position and orientation errors independently, defining multiple sensitivity indices and making it difficult to determine critical geometric errors. In this paper, we propose sensitivity indices that can comprehensively consider position and orientation errors. First, the configuration of the hybrid machine tool is introduced, and the TCP p

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28

Dolgui, A., N. Guschinsky, and G. Levin. "A design of DSS for mass production machining systems." Bulletin of the Polish Academy of Sciences: Technical Sciences 57, no. 3 (2009): 265–71. http://dx.doi.org/10.2478/v10175-010-0128-x.

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A design of DSS for mass production machining systemsIn this paper, we present a decision support tool (DSS) for preliminary design of transfer machines with rotary or mobile tables. In these transfer machines, the machining operations are executed on working positions equipped by standard multi-spindle heads. A part is sequentially machined onmworking positions and is moved from one position to the next using a rotary or a mobile table. The operations are grouped into blocks, where the operations of the same block are simultaneously performed by one multi-spindle head. At the preliminary desi

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29

Nomura, Mitsuyoshi, Takahiro Kawashima, Takayuki Shibata, Yoshihiko Murakami, Masami Masuda, and Osamu Horiuchi. "Development of Axial Encoder to Measure Spindle Axial Motion." International Journal of Automation Technology 3, no. 3 (2009): 286–91. http://dx.doi.org/10.20965/ijat.2009.p0286.

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This paper deals with a newly developed axial encoder to measure spindle axial motion. The axial encoder was composed of a cylindrical rod with circular gratings and an optical encoder head. They were respectively mounted on the spindle nose and the worktable of a vertical milling machine. It has been ascertained by experiments that the prototype can digitally measure spindle axial motion with a resolution of 0.1 μm.

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Hao, Chao, and Jun Gui Huang. "Research on Thermal Analysis of Pillow Spindle System with Multi Axes Rotary Spindle Head." Advanced Materials Research 418-420 (December 2011): 1829–33. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1829.

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Based on the theory of finite-element method, a model of pillowed multiple axes rotary spindle head is built. Taking both temperature and structure load into account of the model, a calculation is made on thermal couple deformation under the combined action of the two kinds of load. A prediction on the rationality during system designing is put forward, which has gotten a wider use.

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Zhang, Lei, Qing Jian Liu, Tai Yong Wang, Hong Bin Li, and Wei Tian. "Structural Design and Improvement of Spindle in Five-Axis Wood Engraving Machine." Key Engineering Materials 693 (May 2016): 200–204. http://dx.doi.org/10.4028/www.scientific.net/kem.693.200.

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In the wood engraving industry, the double swing motor spindle or the double rotation motor spindle is often used as the spindle of five-axis wood engraving machine to achieve three-dimensional sculpture. However, the rough and motor spindle may interfere with each other during machining. Hence, many small regions of rough cannot be machined. To solve this problem, an anthropomorphic double-swing-head mechanism is designed. Instead of motor spindle, the designed mechanism is used as spindle of five-axis wood engraving machine. The level of automation and machining scope of the machine are impr

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Kimura, Tokuhiro, Makio Mukai, Akihiro Shiotani, Kazuhisa Moro, Asako Ikeda, and Yasunori Okada. "Basaloid Squamous Carcinoma of the Hypopharynx With an Extensive Spindle Cell Component Exhibiting a Pedunculated Polypoid Mass." Archives of Pathology & Laboratory Medicine 129, no. 4 (2005): e94-e96. http://dx.doi.org/10.5858/2005-129-e94-bscoth.

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Abstract We report a case of basaloid squamous carcinoma of the hypopharynx with an extensive spindle cell component in an 82-year-old man. The tumor (4.0 × 2.5 × 2.2 cm) was a pedunculated polypoid mass that was attached to the left pyriform sinus. Histologically, most (70%) of the tumor was composed of malignant spindle cell proliferation, and the rest (30%) was basaloid squamous carcinoma. Some of the spindle cells were positive for cytokeratins. The preoperative histologic diagnosis was difficult because the endoscopic biopsy specimens showed only spindle cell proliferation. This is an unu

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Hu, Ru Fu, Xiao Ping Chen, and Huan Xin Yao. "Analysis and Optimization of Thermal Characteristics for NC Lathe Spindle System." Advanced Materials Research 341-342 (September 2011): 291–95. http://dx.doi.org/10.4028/www.scientific.net/amr.341-342.291.

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Improving thermal characteristics is a crucial approach for increasing machining accuracy of NC lathe. Modeling and analysis of thermal characteristics to a high speed NC lathe were implemented by using finite element method in this paper. Based on this, temperature rise characteristic of the whole spindle system was obtained. The thermal deformation of spindle system due to thermal-mechanical coupling was calculated. Layout and parameter were optimized for the radiating plate of spindle box. And this leads to a considerable reduction in the run-out error of spindle head. The optimization resu

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Maheshwar, A., M. D. Barnes, A. G. Douglas-Jones, N. R. Nind, and S. H. Burroughs. "Spindle cell angiosarcoma of the oropharynx." Journal of Laryngology & Otology 114, no. 2 (2000): 160–62. http://dx.doi.org/10.1258/0022215001904987.

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Angiosarcomas are uncommon malignant tumours of vascular endothelium. In the head and neck, the scalp is the commonest site of origin. A rare case of spindle-cell angiosarcoma of the oropharynx, treated by surgery and post-operative radiotherapy, is reported. We discuss the clinical presentation and histopathological diagnosis of this lesion.

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Nazir, Samar, Athar Khan, Muhammad Ilyas, Safia ., Muhammad Ali, and Aalishan Ali Memon. "Spindle Cell Carcinoma in Head and Neck Region." Pakistan Journal of Medical and Health Sciences 15, no. 9 (2021): 3028–30. http://dx.doi.org/10.53350/pjmhs211593028.

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Objective: The aim of this study was to evaluate clinicopathological characteristics, treatment and outcomes of spindle cell carcinoma. Study Design: Retrospective study Place and Duration: Multi-centric (MMDC, Multan and Dow university of Health Sciences, Karachi) Nov 2020-July 2021. Methods: There were 40 patients of both genders were presented in this study, patients were aged between 20-70 years. Patients detailed demographics were recorded after taking informed written consent. Patients with primary tongue disease comprised 17 of 40, 13 had primary paranasal sinus disease, 5 had primary h

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Mousavi, S., V. Gagnol, and P. Ray. "Machining prediction of spindle–self-vibratory drilling head." Journal of Materials Processing Technology 213, no. 12 (2013): 2119–25. http://dx.doi.org/10.1016/j.jmatprotec.2013.06.012.

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Krol, O., V. Sokolov, and P. Tsankov. "Modeling of vertical spindle head for machining center." Journal of Physics: Conference Series 1553 (May 2020): 012012. http://dx.doi.org/10.1088/1742-6596/1553/1/012012.

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Stepanov, Mykhailo, Petro Litovchenko, Larysa Ivanova, and Maryna Ivanova. "EXPERIMENTAL STUDIES OF WORKING FLUID TEMPERATURE IN SPINDLE BEARINGS OF CYLINDRICAL GRINDING MACHINES." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 1 (July 28, 2022): 27–32. http://dx.doi.org/10.20998/2079-004x.2022.1(5).04.

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Experimental studies of the temperature of the working fluid in the spindle bearings of the grinding head of circular grinding machines of different models have been performed. The conditions of the performed experimental researches are described. The influence of ambient temperature and design parameters of grinding head parts on the change of working fluid temperature in the front and rear spindle bearings is considered. It is experimentally proven that the difference in fluid temperatures in the front and rear bearings depends on the operating time of the machine. The time interval of machi

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Micun, Krzysztof, and Sławomir Roj-Rojewski. "Morphological characteristics and lithological conditions of the spring-heads in the Knyszyńska Primeval Forest." Journal of Water and Land Development 40, no. 1 (2019): 27–37. http://dx.doi.org/10.2478/jwld-2019-0003.

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Abstract The aim of the study was to determine the morphological characteristics of selected spring-heads in the Knyszyńska Primeval Forest and to identify lithological conditions in areas where groundwater flows to the surface. During the study, detailed bed level measurements of the spring-head areas were conducted. Lidar laser data obtained from the Central Department of Geodetic and Cartographic Documentation in Warsaw were also used for the analysis of morphometry. Based on the data, the detailed contour maps were created in the Surfer 12 programme and the basic parameters of the morphome

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Chan, Y. S., J. Kasper, and V. J. Wilson. "Dynamics and directional sensitivity of neck muscle spindle responses to head rotation." Journal of Neurophysiology 57, no. 6 (1987): 1716–29. http://dx.doi.org/10.1152/jn.1987.57.6.1716.

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With the use of floating electrodes we recorded from the C2 dorsal root ganglion of decerebrate cats during sinusoidal and trapezoidal head rotation. Fifty-one spontaneously firing afferents were identified as muscle spindle endings. Some were identified by their excitatory response to injection of succinylcholine, others by the similarity of their behavior to that of endings excited by the drug. Because afferent input to the ganglion was restricted by sectioning most nerve trunks, most spindle endings were presumably located in ventral and ventrolateral perivertebral muscles. The firing of ea

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Showa, Yuta, and Hayato Yoshioka. "Reduction of the Influence of Non-Repeatable Run-Out in X-Y Plane of Machining Surface." International Journal of Automation Technology 16, no. 2 (2022): 149–56. http://dx.doi.org/10.20965/ijat.2022.p0149.

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In recent years, the quality of the machined surfaces of molds for optical or medical instruments has needed improvement, and the fabrication of mirrored surfaces by means of cutting only has been gaining in importance. In order to obtain smooth surfaces, it is necessary to reduce various vibrations in the machine tool during the machining process. Many factors cause vibration in a machine tool, including feed mechanisms, pumps, and chatter. A high-speed spindle for precision machining is one source of vibration, but it is a challenge to avoid the non-repeatable run-out (NRRO) of a spindle. Th

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Deewani, Muhammad Hammad, Muhammad Hassan Danish, Muhammad Sohail Awan, and Nasir Ud Din. "Low-grade fibromyxoid sarcoma of the parapharyngeal space: an unusual location." BMJ Case Reports 14, no. 5 (2021): e237083. http://dx.doi.org/10.1136/bcr-2020-237083.

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Low-grade fibromyxoid sarcoma (LGFMS) is an uncommon soft-tissue malignancy. LGFMS preferentially affects trunks and extremities of young adults; however, occasional cases have been reported in different sites of head and neck region including oral cavity, larynx and oropharynx. LGFMS usually exhibit areas of collagenised and myxoid stroma with appearance of spindle cells in whorling pattern. It is a challenge to diagnose it accurately as most of the time it is misdiagnosed as benign neoplastic entity of spindle cells. There have been only few isolated cases of LGFMS reported in head and neck

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Busch, Julia M. C., Minos-Timotheos Matsoukas, Maria Musgaard, Georgios A. Spyroulias, Philip C. Biggin, and Ioannis Vakonakis. "Identification of compounds that bind the centriolar protein SAS-6 and inhibit its oligomerization." Journal of Biological Chemistry 295, no. 52 (2020): 17922–34. http://dx.doi.org/10.1074/jbc.ra120.014780.

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Centrioles are key eukaryotic organelles that are responsible for the formation of cilia and flagella, and for organizing the microtubule network and the mitotic spindle in animals. Centriole assembly requires oligomerization of the essential protein spindle assembly abnormal 6 (SAS-6), which forms a structural scaffold templating the organization of further organelle components. A dimerization interaction between SAS-6 N-terminal “head” domains was previously shown to be essential for protein oligomerization in vitro and for function in centriole assembly. Here, we developed a pharmacophore m

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SHIMIZU, Shinji, Yosuke UENO, and Haruhisa SAKAMOTO. "C004 Characteristics of thermal displacement of cylindrical grinding machines with rotation of wheel spindle : Influence of thermal displacement of wheel spindle and wheel spindle head." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2013.7 (2013): 319–22. http://dx.doi.org/10.1299/jsmelem.2013.7.319.

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Sun, Wen Lei, Xiao Li Li, and Chang Bing Fu. "Cotton Picker Picks Roller Motion Simulation and Dynamics Analysis." Applied Mechanics and Materials 34-35 (October 2010): 1765–69. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1765.

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The drum is the process of picking cotton, picking cotton picker cotton picker head of the key device, which controls the seat tube and Abstract Abstract ingot of movement, Abstract spindle picking of cotton is also directly affect the quality and efficiency of key factors. Therefore, by creating a virtual prototype model cotton picker roller, about picking cotton picker principle, and the movement simulation model to arrive at, dynamic model of the external force, the cotton picker spindles moving speed of the Summary Block pipe displacement, velocity and acceleration effects. Then summed up,

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Khadim, MT, A. Asif, Z. Ali, S. Jamal, and R. Ahmad. "Spindle Cell Rhabdomyoscarcoma of the Tongue - A Rare Entity." Nepalese Journal of ENT Head and Neck Surgery 2, no. 1 (2012): 27–28. http://dx.doi.org/10.3126/njenthns.v2i1.6783.

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Carroll, Sarah Jayne, and Laurentia Nodit. "Spindle Cell Rhabdomyosarcoma: A Brief Diagnostic Review and Differential Diagnosis." Archives of Pathology & Laboratory Medicine 137, no. 8 (2013): 1155–58. http://dx.doi.org/10.5858/arpa.2012-0465-rs.

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Spindle cell rhabdomyosarcoma is a rare variant of embryonal rhabdomyosarcoma that has a predilection for young males and most commonly involves the paratesticular region followed by head and neck. Histopathology demonstrates elongated spindle cells with fusiform to cigar-shaped nuclei and indistinct eosinophilic cytoplasm arranged in fascicles or whorls. Although the tumor demonstrates increased cellularity and moderate atypia, the microscopic and architectural patterns can allow this tumor to be confused with multiple entities, such as leiomyosarcoma, spindle cell carcinoma, desmoplastic mel

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Ni, Yanbing, Biao Zhang, Yupeng Sun, and Yuan Zhang. "Accuracy analysis and design of A3 parallel spindle head." Chinese Journal of Mechanical Engineering 29, no. 2 (2016): 239–49. http://dx.doi.org/10.3901/cjme.2015.1210.144.

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González, V., M. Rodriguez, V. Morillo, R. Muelas, A. Conde, and C. Ferrer. "Spindle cell head and neck tumour. A case report." Reports of Practical Oncology & Radiotherapy 18 (June 2013): S255. http://dx.doi.org/10.1016/j.rpor.2013.03.288.

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Jeong, H. S., J. R. Cho, and H. C. Park. "Development of Dissimilar Inertia Welding Process of Large Superalloy Spindle." Key Engineering Materials 345-346 (August 2007): 1429–32. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.1429.

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Considering the exhaust valve spindle consists of a valve head and a stem comprising the body, the use of different materials, that is, Nimonic 80A for the head and SNCrW for the stem, can reduce the manufacturing cost dramatically. The inertia welding was conducted to make the large exhaust valve for low speed marine diesel engines, superalloy Nimonic 80A for valve head of 540mm diameter and high alloy SNCrW for valve stem of 115mm diameter. Due to different properties of material like thermal conductivity and flow stress on the two sides of the weld interface, modeling is crucial in determin

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