High speed machining technology of automobile mould

At present, the international high-speed machining technology is mainly used in the automotive industry and mold industry, especially in the field of machining complex surfaces, and the machining field with high rigidity requirements for the workpiece itself or tool system, which shows a powerful function. Its efficiency and high quality are highly respected by people. With the vigorous development of China's market economy, the mold industry, as an important foundation of manufacturing, has developed rapidly, which provides a broad space for the application and development of high-speed milling technology. High speed milling technology has the advantages of short processing time, high product accuracy, very smooth processing surface, effective processing of high hardness materials and hardened steel, avoiding electrode manufacturing and time-consuming EDM time, and greatly reducing the amount of grinding and polishing of fitters.

High speed cutting technology is one of the main development directions of cutting technology. It will go to a higher level with the development of basic technologies such as CNC technology, microelectronics technology, new materials and new structures. But we should also be sober to see that high-speed cutting technology itself also has some urgent problems to be solved. At the same time, CNC machine tools, turning, milling, drilling and other tools used in high-speed cutting, cad/cam software and other technologies are high and expensive, which makes high-speed cutting investment, which restricts the promotion and application of high-speed cutting technology to a certain extent.

High speed machining technology has been widely used in the automobile mold manufacturing industry at home and abroad, and has achieved great benefits. However, the mechanism and related theories of high speed machining are still imperfect, and the high speed machining database for automobile molds has not been established. Domestic and foreign enterprises still choose high-speed cutting tool parameters and high-speed cutting processing parameters mainly by the traditional "trial cutting" method and "experience" method. When processing a new type of material, it is often necessary to use a variety of tools to carry out repeated cutting tests, study and analyze the wear, damage methods and causes of tools, and find out a group of the best tool materials and processing parameters. Such repetition for many times is blind, And waste a lot of human, financial and resources. For the high-speed cutting of special materials such as alloy cast iron, high-strength alloy steel, super alloy (such as titanium alloy), how to select the appropriate cutting tools according to the material characteristics and how to design reasonable cutting parameters are still under research and development.

The research on high-speed machining technology of automobile die and mold in China started late. In recent years, many mold enterprises have purchased a large number of high-speed machining equipment and cutting tools from the United States, Germany, France, Japan and other countries, and explored the process technology of high-speed machining of automobile mold in practice, and achieved some successful experience. However, on the one hand, the introduction of equipment is not equal to the introduction of technology. There is no successful experience in high-speed cutting, especially in the high-speed cutting of large automobile panel dies. How to make the imported equipment play its due role as soon as possible is a major topic in front of enterprise managers and engineering technicians; On the other hand, technicians learn and apply while working, and have explored and accumulated certain high-speed machining examples, process parameters and work experience. How to summarize and save these valuable experiences and lessons for other technicians to learn from and avoid detours is also a difficult problem.

The development time of high-speed machining technology in China is short, and there are still many aspects of cutting mechanism that need further research and improvement, mainly manifested in that due to the substantial increase in speed, the cutting force, cutting heat, tool wear and machining surface conditions generated in the machining process will be significantly different from the phenomena and results caused by the corresponding factors of traditional machining. The lack of high-speed cutting mechanism will hinder the in-depth application of high-speed cutting technology. Therefore, it is necessary to study the high-speed cutting mechanism first in order to deepen the understanding of technicians and operators on high-speed cutting technology, and make full use of high-speed cutting technology to process automotive panel dies with high efficiency and high quality.

Practice has proved that using reasonable processing parameters under certain equipment, materials and processing strategies will greatly improve work efficiency and achieve the best combination of processing efficiency, tool wear and processing quality. Therefore, the optimization of machining parameters in the high-speed machining of auto panel dies is an important technical link to improve the work efficiency and the machining quality of auto panel dies.

An important prerequisite for successful high-speed machining is to bear a nearly constant cutting load, under which a good high-speed machining effect can be guaranteed. For complex mold surfaces, it is necessary to study the machining strategy of removing small changes in material volume and constant cutting load in the machining process to avoid rapid tool wear and reduce tool yield error.

High speed machining database stores high-speed cutting parameters and other data for technicians and operators to query and use. It plays an important role in managing process data and assisting technicians in process planning. In order to improve the working efficiency of technicians and operators and promote the stable and sustainable development of enterprises, it is imperative to establish a cutting database for high-speed machining of automotive panel dies.