scholarly journals Coupling and Decoupling Measurement Method of Complete Geometric Errors for Multi-Axis Machine Tools

2020 ◽  
Vol 10 (6) ◽  
pp. 2164
Author(s):  
Hongwei Wang ◽  
Yan Ran ◽  
Shengyong Zhang ◽  
Yulong Li
Keyword(s):  
Machine Tools ◽  
Measurement Method ◽  
Machining Accuracy ◽  
Geometric Errors ◽  
Homogeneous Transformation Matrix ◽  
Ultra Precision ◽  
Prediction And Control ◽  
Bar Test ◽  
And Control ◽  
Error Transfer

Precision and ultra-precision machining technology rely mainly on the machine tools’ accuracy. To improve it, the measurement, calculation, prediction and control of geometric errors are critical. The traditional measurement methods have lower precision because of ignoring small angle errors. To obtain complete geometric errors of multi-axis machine tools, this paper proposes a new method of coupling and decoupling measurement. Specifically, we used a laser interferometer and dial indicators to measure 36 items of complete geometric errors of multi-axis machine tools. A homogeneous transformation matrix (HTM) was applied to model the error transfer route. The transfer law of complete errors for each machining point was explored and derived. Furthermore, we selected and calculated integrated errors of 36 machining points. Finally, we proved the correctness of the method by comparing the measurement result of a ball bar test and coupling and decoupling measurement of geometric errors. We found that items of small geometric angle errors have a greater impact on machining accuracy than those of geometric displacement errors. Complete geometric errors measured via the coupling and decoupling measurement method can evaluate integrated errors more precisely and comprehensively.

scholarly journals Research on Deterministic Figuring of Ultra-Precision Shaft Parts Based on Analysis and Control of Figuring Ability

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2458
Author(s):  
Zizhou Sun ◽  
Yifan Dai ◽  
Hao Hu ◽  
Guipeng Tie ◽  
Chaoliang Guan ◽  
...  
Keyword(s):  
Machine Tools ◽  
Measured Data ◽  
Numerical Control ◽  
Cnc Machine Tools ◽  
Machining Efficiency ◽  
Air Bearing ◽  
Cnc Machine ◽  
Ultra Precision ◽  
Precision Machine Tools ◽  
And Control

The application of ultra-precision shaft parts is widely used, such as the spindle core of the air bearing spindle in ultra-precision machine tools. The precision of the spindle core is extremely high, and it is very difficult to obtain directly by traditional Computer Numerical Control (CNC) machine tools but is mostly obtained by manual grinding, whose machining efficiency is greatly limited. Based on the deterministic figuring theory, this paper focuses on the ultra-precision roundness, optimizing the filtering parameters of the measurement error data and studying the generation mechanism of the removal function morphology; the shape of the removal function is adjusted by combining the analysis of the figuring ability and positioning error. Finally, the optimized removal function is used on an experimental steel shaft, the average roundness convergence ratio is 72% higher than that of the original removal function, and the roundness reaches a 0.1 μm level. The result shows that a reasonable filtering of measured data and the removal function adjusted for the surface feature can improve the efficiency and precision of deterministic figuring on shaft parts.

Current Development and Countermeasure of Ultra-Precision Machine Tools

2010 ◽  
Vol 455 ◽  
pp. 632-636
Author(s):  
R.J. Song ◽  
J.L. Niu ◽  
Dong Hai Chen
Keyword(s):  
Machine Tools ◽  
Precision Machining ◽  
Machining Accuracy ◽  
Current Development ◽  
Factors Influencing ◽  
Precision Machine ◽  
Ultra Precision ◽  
Precision Machine Tools

Ultra-precision machine tools is an important machinery equipment to implement ultra-precision machining. Current development and the trend of the ultra-precision machine tools was analyzed. The factors influencing machining accuracy were pointed out from the viewpoint of system. Some suggestions were put forward on the domestic development and research of the ultra-precision machine tools.

Effektive Analyse von Werkzeugmaschinenkalibrierdaten*/Effective analysis of machine tool calibration data. VoluSoft as a showcase for user-friendly visualization and processing of machine tool calibration data

2018 ◽  
Vol 108 (11-12) ◽  
pp. 755-759
Author(s):  
B. Montavon ◽  
P. Dahlem ◽  
R. Schmitt
Keyword(s):  
Machine Tool ◽  
Machine Tools ◽  
Industrie 4.0 ◽  
Calibration Data ◽  
Geometric Errors ◽  
Compensation Process ◽  
Trained Personnel ◽  
User Friendly ◽  
And Control ◽  
Effective Analysis

Kalibrierung und steuerungsbasierte Kompensation geometrischer Fehler von Werkzeugmaschinen sind industriell verfügbare Technologien, ihre Anwendung ist jedoch wenig verbreitet. Die Ursachen hierfür sind häufig der hohe Zeitaufwand, das Defizit an geschultem Personal oder unklare Formulierung des wirtschaftlichen Mehrwertes. Die entwickelte Software „VoluSoft“ zeigt einen Ansatz zur anwenderfreundlichen und flexiblen Verarbeitung von Kalibrierdaten, mit dem Ziel, den Prozess zu vereinfachen und die Wertschöpfung aus den gewonnen Kalibrierdaten im Sinne von Industrie 4.0 zu steigern.   Calibration and control-based compensation of geometric errors of machine tools are methods available at industrial scale, although their application is not very common. Some of the reasons are the high amount of time needed, the lack of trained personnel or the vagueness of their economic benefit. The developed Software “VoluSoft” showcases user-friendly analysis and processing of machine tool calibration data with the objective of simplifying the compensation process. Moreover, the creation of value from calibration data in the context of Industrie 4.0 is increased.

Special Issue on Process Machine Interactions

2013 ◽  
Vol 7 (4) ◽  
pp. 377-377
Author(s):  
Eiji Shamoto
Keyword(s):  
Machine Tools ◽  
Machining Process ◽  
Machining Accuracy ◽  
Special Issue ◽  
Large Force ◽  
The Future ◽  
And Control ◽  
Measurement And Control ◽  
Grinding And Polishing

Machining, such as cutting, grinding and polishing, is involved in the production of many industrial parts as one of manufacturing’s most important processes. Some of the parts are made directly by machining, and many other parts are mass-produced indirectly by machining through dies and molds. The accuracy of these components thus depends strongly on the machining process. Machining is not an easy process, of course, since it generates large force and heat. Although machine tools are controlled to move precisely, the force and heat cause practical problems such as vibration, the displacement and deformation to mechanical structures, failure and wear in tools, errors of machining, measurement and control, etc. In many cases, these problems adversely affect or even change the process, which may cause further problems. It is difficult but necessary to understand these mutual interactions to solve the problems and improve the machining process itself. This special issue contains interesting papers that help answer important questions in machining, including the control, monitoring, simulation, and development of new fabrication processes. These papers promise to help improve machining accuracy and efficiency and to realize fully automated machining in the future. We thank the authors for their insightful contributions and the reviewers for their invaluable advice that have made this special issue both fascinating and worthwhile.

Sign in / Sign up

Export Citation Format

Share Document