Graphite is a typical heterogeneous brittle material, and the graphite chips generated during high-speed milling are usually granular micro
Fine dust, even with a strong dust collection system, is very easy to scatter, accumulate and adhere to the front and rear blade surfaces and the added
On the working surface, together with the processed graphite material, it exerts a strong friction effect on the cutting tool, so the graphite cutting
The cutting tools are worn and damaged seriously. Generally, the tool cost caused by tool wear accounts for the total
It is more than one third of the cost, and it also leads to the difficulty in ensuring the dimensional accuracy and surface quality of the workpiece.
In the process of graphite high-speed milling, cutting impact may be caused to the graphite workpiece due to the following reasons:,
It leads to brittle collapse of graphite electrode corners: (1) change of milling direction of workpiece fillet or corner; (2) Machine tool
Sudden change of acceleration: (3) change of cutting direction and angle; (4) Intermittent milling
Cutting vibration: (5) tool wear and breakage.
At present, in the actual production process of China's graphite electrode high-speed processing enterprises, the selection of process parameters
The choice mainly depends on the on-site practical experience of programmers. Due to lack of systematic graphite high speed milling process
Technical theory is the guide, so it is difficult to choose different machining methods, tool materials, workpiece materials and shapes
Special requirements for timely and reasonable selection of high-speed milling process parameters also restrict the further development of graphite electrode
One of the key factors for promotion and application.
Therefore, how to explore the wear mechanism of graphite machining tools and the process of machining based on basic theoretical research
The crushing mechanism of the workpiece, reasonable selection of high-speed milling process, low-cost, high-precision and high-efficiency graphite addition
It is an important application basic research problem that needs to be solved urgently in graphite processing.
This paper aims at the problems of serious tool wear and graphite electricity in the process of high-speed milling graphite with cemented carbide micro milling cutter
To solve the problems such as the breakup of polar corner and the lack of theoretical guidance for the selection of cutting tools and their geometric parameters, tribology and cutting force were used
Materials science and materials science, as well as online photography technology, material microanalysis technology and test analysis technology,

Through a large number of orthogonal cutting experiments, high-speed milling experiments and friction and wear experiments, the orthogonal cutting of graphite was deeply studied
Chip formation mechanism of cutting and high-speed milling, graphite cutting mechanism model is proposed, and graphite / hard is systematically studied
The sliding friction wear and abrasive wear behavior of the alloy pair reveal that the relationship between the matrix material and coating of cemented carbide tools and
The friction and wear mechanism of graphite, and the influence of tool material, geometric angle and process parameters on surface machining
The process parameters of graphite high-speed milling are optimized according to the influence of quality, cutting force and tool wear,

On this basis, the typical thin-walled graphite electrode can be processed with low cost, high accuracy and high efficiency.

These studies are of great significance to improve the machining technology level of high-speed milling of graphite electrodes, and will also provide new opportunities for China's mold manufacturing industry

The exhibition has brought greater impetus and certain economic benefits.