Abstract

With the continuous popularization of automation in the manufacturing industry and continuous improvement of production efficiency, new requirements have been put forward for the error detection of machine tool. As a new automated detection tool, R-test has been widely studied by scholars. This paper proposes a dynamic test method for R-test, and analyses the influence of three main error sources of servo error, pitch error and reading error. The corresponding elimination methods are also introduced. An experiment on a double turntable machine tool was conducted to verify the analysis. In addition, the selection of feed rate and initial position in circle test is also studied.

Highlights

  • The precision inspection technology is used to guarantee the stable and high-precision operation of CNC machine tools

  • In the face of applying dynamic test methods, we need to compare the impact on measurement results after applying dynamic measurements, and it is beast to establish a model to obtain the deviation between the dynamic test and static test in geometric errors detection

  • Because in addition to the geometric errors which we usually identified, some other error source, such as thermal error[9], servo error[10] and the mechanical pitch error[11], will have impacts on the result of the dynamic error detection

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Summary

Introduction

The precision inspection technology is used to guarantee the stable and high-precision operation of CNC machine tools. For detecting the added two rotating shaft of the fiveaxis machine tool, the researchers have proposed many special measuring devices as well as corresponding theoretical models. Compare with static test methods, dynamic test methods can obtain a large amount of data efficiently, avoiding the cumbersome operation. In the face of applying dynamic test methods, we need to compare the impact on measurement results after applying dynamic measurements, and it is beast to establish a model to obtain the deviation between the dynamic test and static test in geometric errors detection. Introduced the data processing methods to eliminate the impact of new error source due to dynamic test.

Dynamic test error analysis
Servo error
Pitch error
EXPERIMENT
CONCLUSION
Full Text
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