The Simulation Research and Application of VERICUT in the Numerical Control Manufacturing Process of High-Speed Train Main-Frame

2019 ◽  
Vol 08 (04) ◽  
pp. 137-145
Author(s):  
国艳 吕
Keyword(s):  
Manufacturing Process ◽  
High Speed ◽  
Numerical Control ◽  
High Speed Train ◽  
Simulation Research ◽  
Main Frame

The Research on Generation of Arc Face-Gears

2010 ◽  
Vol 37-38 ◽  
pp. 1553-1557
Author(s):  
Yan Mei Cui ◽  
Zong De Fang ◽  
Jin Zhan Su ◽  
Xiang Wei Cai ◽  
Li Ping Wang
Keyword(s):  
Coordinate Transformation ◽  
Manufacturing Process ◽  
High Speed ◽  
3D Model ◽  
Numerical Control ◽  
Tooth Surface ◽  
Face Gear ◽  
Meshing Equation ◽  
The Common ◽  
Control Machine

By a study on the theory of generation processing arc face-gears, a machining method was designed by generation characteristics on the arc face-gears pairs. Based on coordinate transformation principle and meshing equation, the arc tooth surface equations were derived and corresponding 3D model was build. It verifies the feasibility of generation processing the arc face-gears. Conjugate enveloping guarantees precise action on the arc face-gear pairs. Gear surface generated by machining angle, curvature features are improved which is helpful to obtain top-quality transmission. Independent cutting major movement achieves high-speed and high-precision process. It is convenient to generating arc face-gears by using the general multi-axle numerical control machine with the common Gleason Cutter. The manufacturing process is simple.

Recent Patents on the Angular Contact Ball Bearing of High-Speed Motorized Spindle

2020 ◽  
Vol 13 ◽  
Author(s):  
Yudong Bao ◽  
Linkai Wu ◽  
Yanling Zhao ◽  
Chengyi Pan
Keyword(s):  
High Speed ◽  
Ball Bearing ◽  
Rapid Development ◽  
Ceramic Materials ◽  
Development Trend ◽  
Numerical Control ◽  
Angular Contact Ball Bearing ◽  
Practical Applications ◽  
High Speed Cutting ◽  
Advantages And Disadvantages

Background:: Angular contact ball bearings are the most popular bearing type used in the high speed spindle for machining centers, The performance of the bearing directly affects the machining efficiency of the machine tool, Obtaining a higher value is the direction of its research and development. Objective:: By analyzing the research achievements and patents of electric spindle angular contact bearings, summarizing the development trend provides a reference for the development of electric spindle bearings. Methods:: Through the analysis of the relevant technology of the electric spindle angular contact ball bearing, the advantages and disadvantages of the angular contact ball bearing are introduced, and the research results are combined with the patent analysis. Results:: With the rapid development of high-speed cutting and numerical control technology and the needs of practical applications, the spindle requires higher and higher speeds for bearings. In order to meet the requirements of use, it is necessary to improve the bearing performance by optimizing the structure size and improving the lubrication conditions. Meanwhile, reasonable processing and assembly methods will also have a beneficial effect on bearing performance. Conclusion:: With the continuous deepening of bearing technology research and the use of new structures and ceramic materials has made the bearing's limit speed repeatedly reach new highs. The future development trend of high-speed bearings for electric spindles is environmental protection, intelligence, high speed, high precision and long life.

Tribological and dynamical analysis of a brake pad with multiple blocks for a high-speed train

2019 ◽  
Vol 234 (11) ◽  
pp. 1771-1788
Author(s):  
YK Wu ◽  
JL Mo ◽  
B Tang ◽  
JW Xu ◽  
B Huang ◽  
...  
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Dynamical Analysis ◽  
Brake Disc ◽  
Brake Pad ◽  
High Speed Train ◽  
Brake Squeal ◽  
Element Analysis ◽  
Single Block ◽  
Middle Ring

In this research, the tribological and dynamical characteristics of a brake pad with multiple blocks are investigated using experimental and numerical methods. A dynamometer with a multiblock brake pad configuration on a brake disc is developed and a series of drag-type tests are conducted to study the brake squeal and wear behavior of a high-speed train brake system. Finite element analysis is performed to derive physical explanations for the observed experimental phenomena. The experimental and numerical results show that the rotational speed and braking force have important influences on the brake squeal; the trends of the multiblock and single-block systems are different. In the multiblock brake pad, the different blocks exhibit significantly different magnitudes of contact stresses and vibration accelerations. The blocks located in the inner and outer rings have higher vibration acceleration amplitudes and stronger vibration energies than the blocks located in the middle ring.

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