Mold processing is a large area where high-speed cutting technology is used, and plastic molds are an important part of the mold.
The concept of high-speed cutting
As early as the 1930s, Salomon found through metal cutting experiments: in the metal cutting process, as the cutting speed increases, the cutting force and cutting temperature also increase, but when the cutting speed reaches a certain critical value, the cutting On the contrary, the force and cutting temperature decrease sharply with the increase of cutting speed. According to this, Salomon proposed the concept of high-speed machining. The real realization of high-speed machining has been rapidly developed in the past ten or twenty years. This technology is a high-tech that has developed rapidly with the development of modern manufacturing technology. The so-called high-speed cutting means that compared with traditional cutting, it is 5-10 times higher than the conventional cutting speed, or even higher speed, higher feed rate, and the worktable has a greater rapid movement speed, greater acceleration and Requirements such as fast tool change make the cutting process have the characteristics of high efficiency, high quality, high precision, and low energy consumption. Specifically, high-speed cutting has the following characteristics:
It has high cutting speed and high spindle speed. At present, the spindle speed of foreign high-speed milling machine is 10000～40,000r/min, and the spindle speed of domestic high-speed milling machine is usually about 10000r/min;
With high fast moving speed, the fast moving speed of the high-speed milling machine reaches 30m/min～90m/min;
The metal removal rate is high, and the cutting efficiency is high. The metal removal rate when cutting 45# steel is usually 300～600cm3/min;
High positioning accuracy throughout the entire process and high repeat positioning accuracy.
With the continuous development of the market economy, the development cycle of automobiles and home appliances has been greatly shortened, and the shapes of parts have become more and more complex. Based on traditional CNC machining methods, it is difficult to meet the machining requirements, and high-speed machining technology (High Speed Machining) came into being. This technology belongs to a cutting-edge technology of current mold processing.
The key technology of high-speed cutting of mold
Due to the many characteristics of high-speed machining technology and the complex profile of mold parts, high-speed mold machining technology puts forward higher requirements on machine tools, cutting tools, and numerical control systems in the machining system.
Post time: Oct-12-2021