polishing for free form surfaces

 

 

DING Ye1,2, ZHAN Jian ming3, HAN Qiang1,2, XV Ke pin1,2

 

(1. School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China; 2. Zhejiang 

 

Provincial Key Lab of Part Rolling Technology, Ningbo 315211, China; 3. College of Mechanical and Energy

 

Engineering, Zhejiang University Ningbo Institute of Technology, Ningbo 315100, China)

 

 

Abstract: Aiming at problems such as difficult operation and expensive cost in 5 axis equipment for free form surfaces polishing, a 4 axis complaint polishing tool system featured with excellent curve tracking ability was designed. It was on the basis of 3 axis CNC milling machine to realize the automatic finish machining of the mold curved surfaces. The force space and the position space were decomposed orthogonally in the process of polishing due to the hybrid force/position servo control strategy. Considering the differences between tool system coordinates and 3 axis CNC milling machine coordinates, the forming mechanism and process of 4 axis precision polishing for free form surfaces were studied in detail. A set of auto programming software system, which could form executable NC codes, was developed by applying Visual Basic as an object oriented development tool. The trajectory coincides with the appearance of a complex surface, which is validated by simulation in ADAMS. The results indicate that this technique is competent in the precision polishing for free form surfaces.

 

Key words: free form surfaces; 4 axis numerical control machining; compliant polishing; auto programming