Dynamic Accuracy Design Method of Ultra-precision Machine Tool

Guo-Da Chen,Ya-Zhou Sun,Li-Hua Lu,Nan Yu,Fei-Hu Zhang,Wan-Qun Chen

doi:10.1186/s10033-018-0208-7

Abstract

Ultra-precision machine tool is the most important physical tool to machining the workpiece with the frequency domain error requirement, in the design process of which the dynamic accuracy design (DAD) is indispensable and the related research is rarely available. In light of above reasons, a DAD method of ultra-precision machine tool is proposed in this paper, which is based on the frequency domain error allocation. The basic procedure and enabling knowledge of the DAD method is introduced. The application case of DAD method in the ultra-precision flycutting machine tool for KDP crystal machining is described to show the procedure detailedly. In this case, the KDP workpiece surface has the requirements in four different spatial frequency bands, and the emphasis for this study is put on the middle-frequency band with the PSD specifications. The results of the application case basically show the feasibility of the proposed DAD method. The DAD method of ultra-precision machine tool can effectively minimize the technical risk and improve the machining reliability of the designed machine tool. This paper will play an important role in the design and manufacture of new ultra-precision machine tool.

Highlights

Ultra-precision machining technology plays an increasingly important role in the future manufacturing field
In the traditional design of the Ultraprecision Machine Tool (UMT), one can basically meet the design requirements only by the Static Accuracy Design (SAD), in which the machine component errors are considered as static errors or quasi-static errors and the values used in the design model and its optimization model focuses on the amplitude characteristics of the errors
For satisfying the workpiece machining with the requirement of frequency domain errors, in this paper, we propose a Dynamic Accuracy Design (DAD) method of UPM

Summary

Introduction

Ultra-precision machining technology plays an increasingly important role in the future manufacturing field. The time period of OPFIE is about 10‒30 s, so the corresponding time domain frequencies are 0.033‒0.1 Hz. They are low frequency errors, and the corresponding spatial frequencies in the feed direction are 0.55‒1.67 mm−1, which belong to the evaluation range of Band 3 and need satisfy the PSD requirement.

Objectives

Results

Conclusion