Ultra-precision Single-point Grinding Technique and Profile Error Compensation Method for Machining Aspheric Mould

2010 ◽  
Vol 46 (23) ◽  
pp. 186 ◽  
Author(s):  
Fengjun CHEN
Keyword(s):  
Error Compensation ◽  
Single Point ◽  
Compensation Method ◽  
Profile Error ◽  
Ultra Precision ◽  
Grinding Technique

Error Compensation in One-Point Inclined-Axis Nanogrinding Mode for Small Aspheric Mould

2010 ◽  
Vol 97-101 ◽  
pp. 4206-4212 ◽  
Author(s):  
Shao Hui Yin ◽  
Feng Jun Chen ◽  
Yu Wang ◽  
Yu Feng Fan ◽  
Yong Jian Zhu ◽  
...  
Keyword(s):  
Error Compensation ◽  
Single Point ◽  
Ground Surface ◽  
Compensation Method ◽  
Grinding Wheel ◽  
Form Error ◽  
Profile Data ◽  
Profile Error ◽  
Form Accuracy ◽  
Setting Error

A compensation method was proposed for correcting wheel setting error and residual form error in nanogrinding of axisymmetric surfaces. In this method, profile data from on-machine measurement were used to obtain the setting error of grinding wheel, as well as the normal residual form error. Compensation model of single-point inclined-axis grinding was built up for generating new compensation path. Grinding test of aspheric tungsten carbide mould was conducted to evaluate performances of the compensation method. A profile error of 182 nm (peak to valley) and average surface roughness of 1.71 nm were achieved. These results indicated that the form error compensation method may significantly improve form accuracy of ground surface.

An on-machine error compensation method for an ultra-precision turning machine

2017 ◽  
Vol 233 (5) ◽  
pp. 1608-1613
Author(s):  
Xicong Zou ◽  
Xuesen Zhao ◽  
Guo Li ◽  
Zengqiang Li ◽  
Zhenjiang Hu ◽  
...  
Keyword(s):  
Error Compensation ◽  
Rapid Development ◽  
Compensation Method ◽  
Machining Accuracy ◽  
Manufacturing Cost ◽  
Program Code ◽  
Machine Error ◽  
Measurement Results ◽  
Ultra Precision ◽  
Compensation Technique

On-machine error compensation (OMEC) is efficient at improving machining accuracy without increasing extra manufacturing cost, and involves the on-machine measurement (OMM) of machining accuracy and modification of program code based on the measurement results. As an excellent OMM technique, chromatic confocal sensing allows for the rapid development of accurate and reliable error compensation technique. The present study integrated a non-contact chromatic confocal probe into an ultra-precision machine for OMM and OMEC of machined components. First, the configuration and effectiveness of the OMM system were briefly described, and the relevant OMEC method was presented. With the OMM result, error compensation software was then developed to automatically generate a modified program code for error compensation. Finally, a series of cutting experiments were performed to verify the validity of the proposed OMEC method. The experimental results demonstrate that the proposed error compensation method is reliable and considerably improves the form error of machined components.

The Multi-Joint Measuring Arm’s Error Compensation Method Based on the Pose Configurations

2011 ◽  
Vol 117-119 ◽  
pp. 751-755
Author(s):  
Hui Yuan Xiong ◽  
You Xu ◽  
Zhi Jian Zong ◽  
Qun Gao
Keyword(s):  
Error Compensation ◽  
Measurement Accuracy ◽  
Orthogonal Design ◽  
Single Point ◽  
Compensation Method ◽  
Polynomial Model ◽  
Point Measurement ◽  
Calibration Algorithm

The multi-joint measuring arm’s measurement accuracy is associated with the measuring pose configuration. As the feature of the multi-joints arm with the adjacent joint orthogonal design, the triangle-based representation of measuring arm configuration was derived. Then measuring arm pose configuration simplified representation was presented. Based on the simplified representation, a polynomial model of comprehensive error compensation was proposed, and the calibration algorithm was derived.Tests confirmed the effectiveness of the method, which can effectively improve the single-point measurement accuracy.

Tool Errors Compensation in Precision and Ultra-Precision Milling Based on the Least-Square Method

2011 ◽  
Vol 291-294 ◽  
pp. 428-431
Author(s):  
Kai Guo Fan ◽  
Jian Guo Yang ◽  
Li Yan Yang
Keyword(s):  
Error Compensation ◽  
Least Square Method ◽  
Compensation Method ◽  
Least Square ◽  
Weighting Coefficient ◽  
Machining Accuracy ◽  
Cnc Milling ◽  
Cnc Milling Machine ◽  
Machined Parts ◽  
Ultra Precision

The CNC milling machine is extensively used in manufacturing of the die and the box-type parts. However, the tool errors, which caused by the cutting heat and the cutting force, seriously affect the machining accuracy of the machined parts. Furthermore, the tool errors are too complex to be calculated by the empirical formula. To solve this problem, a tool error compensation method is proposed in this paper. The least-square method is employed to structure the error model. A weighting coefficient is proposed to adapt the various working conditions. The macro program is used to realize the real-time error compensation. Using the tool error compensation method, the maximum tool error is reduced from 0.053 mm to 0.005 mm. The error is compensated by 90.5% compared with no compensation.

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