A dynamical tool adjustment method for computer numerical control abrasive belt grinding

Mingde Zhang,Fangyan Zheng,Yining Tan,Tianning Chen,Silin Cao

doi:10.1177/1687814019846276

Abstract

Blisk, as the key component in the aero-engine, is hard to be fabricated for the complexity geometry in comparison with separable impeller. In the process, cutter interference is easy to occur beca...

Highlights

IntroductionSince the gap between the blisk blades is narrow, in order to minimize the interference of the polishing tool, a new type of grinding head is designed as shown, and the polish is realized by the outer side of the grinding wheel
Blisk is an important part of the aero-engine, of which the precision plays an important role in the overall performance of the engine and its operation efficiency
Ren et al.[10] proposed a fouraxis vector control method based on the tool axis control line for the interference problem in the grinding process and proposed a five-coordinate branch axis processing method.[11]

Summary

Introduction

Since the gap between the blisk blades is narrow, in order to minimize the interference of the polishing tool, a new type of grinding head is designed as shown, and the polish is realized by the outer side of the grinding wheel With this grinding head, the tool interference can be reduced and the polishing efficiency is relatively improved; the wheel side polish can avoid the surface overcast or ablative defects caused by Figure 3. In order to avoid the cutter interference, a dynamic adjustment of the angle ui following the tangent u vector is used in the paper, in which the polishing tool is made following the angle of ui It means that angle ui must be changed continuously during the processing.

The optimal rotation angle ub is calculated as follows

Conclusion