Entity

Time filter

Source Type


Lou Z.-F.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Wang L.-D.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Wang L.-D.,Key Laboratory for Micro Nano Technology and System of Liaoning Province | Wang X.-D.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Ma Y.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | Year: 2011

The slippage between discs and rail is one of important factors for the measurement accuracy of an involute. However, control of frictions effectively can modify the slippage of discs. In the paper, frictions between discs and rail are analyzed respectively when a cord and a belt are used to drive the discs to roll. According to the analysis and experiment, it shows that if measuring forces are 0.7 N and 0.2 N and the base discs is drived by the cord and belt, frictions are 0.02 N and 0.07 N respectively, for the base disc clockwise rolled; where the effect of the slippages of based discs on the involute measurement can be ignored. Moreover, the slippage can also be reduced by increasing the weight of base disc groups, and measurement difference of involute is 0.06 μm when the rolling directions of the base discs are different. Source


Zhifeng L.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Liding W.,Key Laboratory for Micro Nano Technology and System of Liaoning Province
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

In all accuracy indexes of gears, measurement of involute tooth profile's error is a difficult technical problem. A double-disc instrument for measuring involute is introduced, which can be used to measure reference involute. The main errors sources of the instrument are analyzed, and all measurement errors are simulated by Mont-Carlo method. After analyzing error sequence, the double disc instrument's measurement uncertainty is 0.45μm when measuring gear (m=4 z=30 α=20°), which is less than the value evaluated by GUM method, and more reliable and accurate. © 2010 SPIE. Source


Lou Z.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Wang X.,Key Laboratory for Micro Nano Technology and System of Liaoning Province | You B.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Xu Y.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2015

In the paper, a precision press-fit instrument for assembling small interference fitting parts is introduced, which includes pressing module and parts alignment module. The pressing module was used to clamp and position parts, and parts alignment module was used for the two parts' alignment. Through analyzing press-fit control method, component alignment and adjustment strategy, and machine vision device calibration method, the instrument meets the pressing requirements of precision small components. Finite element method is used to predict the reasonable range of press-fit force, and pressing result of the instrument is tested by experiments. © 2015 SPIE. Source


Chen W.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Ma Y.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Lou Z.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education
Advanced Materials Research | Year: 2011

Material mechanics and dynamic properties affect the service life of parts, and also the normal operation of machines. In order to reduce the processing time and improve the quality of machining, a cylindrical roller was used in the research. Cylindrical ultrasonic rolling machining (CURM) is an efficient way to enhance the service properties and surface characteristics of components. CURM was designed and later tested on the 45# steel surface. The result showed that the plastic deformation of surface layer was symmetrical and the surface grain was reduced in size by approximately 4.2%. The result of the experiment showed that CURM was effective in enhancing the productivity as well as enlarging the yield strength and hardness of components. © (2011) Trans Tech Publications, Switzerland. Source


Huang Q.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Lou Z.-F.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Ma Y.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education | Wang X.-D.,Key Laboratory for Precision and Non Traditional Machining of Ministry of Education
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2012

Teeth dividing table operates its dividing function by meshing between upper and lower tables, which has the highest dividing accuracy in mechanical field. The impact existing inevitably between teeth affects dividing precision when upper and lower tables is meshing. According to the dynamics theory, elastic dynamics model of upper and lower tables were developed by ANSYS/LS-DYNA. Elastic dynamic responses of meshing teeth were analyzed numerically and then verified by experiment. Numerical results show that, with 1mm falling height of upper table, dividing error is 0.08″ when the upper plate falls in the middle position and dividing error is 0.53″ when the upper plate falls from the left side. Experimental results show that the corresponding dividing errors are 0.09″and 0.53″ respectively under the same conditions mentioned above. The results also illustrate that the impact between teeth becomes smaller and the dividing precision gets higher when the upper table falls in the middle position and the falling height is lower. Source

Discover hidden collaborations