Study and create the post-processor for CAD/CAM software for 5 axes CNC milling

Abstract

This master's thesis aims to the study and creation of a post-processor for 5 axes CNC milling at the Hanoi University of Science and Technology (HUST). The problem with 5 axes milling is the complexity, the ability to use contour milling, compared to 3 axes milling because of the added degrees of freedom. Another problem is that a post processor is unique for every machine. The goal of this thesis is to develop a post processor for a specific 5 axes milling machine, the Mikron UCP 600.

The first part of this thesis consists of research on post-processing in CAD/CAM software Cimatron E11. The processor is written according to the Cimatron E11 standard, General Post Processing (GPP). To simplify the complex 5 axes structure, the Denavit-Hartenberg method is used. This method makes it possible to easily transform coordinates between the axes of the machine.

The post-processor is evaluated only by using software. The software tests show that the GPP uses the kinematic structure of the Mikron UCP 600. The problem of the complexity is not fixed due to fact that GPP can only handle position milling. The machine test was not possible and instead a G-code analysis is made. The possibility to use 5 axes milling is a great opportunity for the HUST. This thesis can be considered as a part of a larger development, meaning that other students can use this thesis in further research.