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Shen Y.,Hunan Automotive Engineering Vocational College
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2013

According to the characteristics of AZ60 magnesium alloy materials, the multi-position progressive die for automobile gasket was designed. Through the relevant analysis and comparison, the design was designed to improve the design efficiency and decrease manufacturing cost.

Liu H.-Y.,Hunan Automotive Engineering Vocational College
Applied Mechanics and Materials | Year: 2014

Design for disassembly in in the whole life cycle of products focused on product disassembly and as the goal; modular design has to face the module and function analysis for main feature, can pass through the module selection and combination of rapid formation of product series. The detachable design and modular design methods combined, AHP is introduced, put forward to face the removable modular design method and analyzes its design flow. Finally, to large lorry bottom side door of stamping die for example and analysis. © (2014) Trans Tech Publications, Switzerland.

Shu W.,Hunan Automotive Engineering Vocational College
Guti Dianzixue Yanjiu Yu Jinzhan/Research and Progress of Solid State Electronics | Year: 2014

A high precision power-on-reset and power supervision circuit is proposed. The accurate threshold voltage is achieved by a bandgap reference based on subthreshold MOS amplifier and hysteresis comparator. The current controlled ring oscillator and digital counter could reduce the static power consumption and provide programmable reset time. The circuit is simulated and validated by SMIC 0.18 μm CMOS process. The circuit draws 10 μA current from a 3.3 V supply, power on reset delay time is ranged from 200 to 400 millisecond, and the measured threshold voltage is 3 V±2%. ©, 2014, NUAA Printing House. All right reserved.

Liu H.,Hunan Automotive Engineering Vocational College
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

Effects of W on microstructure and properties of wear-resistant coatings with W content from 0 to 7.5% prepared by argon arc cladding were analyzed by optical microscopy, hardness tester and wet sand rubber wheel tester. The results indicate that W has a obvious effect on microstructure and proper-ties of coatings. With the increase of W content, the austenite gradually disappears while the content of primary carbide M23C6 is gradually increased. With increasing in W content, the macro-hardness is increased from 52HRC to 62HRC while the wear resistance is increased firstly and then decreased. When W content is 5%, wear resistance of the coating is 22.5 times higher than that of substrate, which is attributed to M23C6 distributing uniformly in the coatings. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.

Yin S.-X.,Zhuzhou Lince Group Co. | Hong M.-Q.,Hunan Automotive Engineering Vocational College
Zhuzao/Foundry | Year: 2014

Reasonable planning in-gating system, and setting up heat insulating feeder over the top of the hot spot of the bearing room to exhaust and feed during the casting design of the axle box. Except this, using chill to adjust hot spot at the bearing room and the bolt hole which connecting the traction motor, then to reduce the solidification time of these molten iron, avoiding the graphite to grow into the coarse graphite or degradated spheroidization, so to ensure that the spheroidization and graphite grade of the axle box casting to reach the requirements of the design standard.

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