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High-speed cutting machine for machining molds
Pay attention to the following issues when selecting a high-speed machine for high-speed cutting dies:
(1) The machine tool spindle is required to have high power and high speed to meet rough and fine machining. The precision machining tool requires a small-diameter tool with a spindle speed of 15,000 to 20,000 rpm. Machines with spindle speeds below 10,000 rpm can be roughed and semi-finished. If it is necessary to satisfy both roughing and finishing in the production of large molds, the selected machine tool preferably has two spindles of two speeds or two types of electric spindles.
(2) The fast feed of the machine tool is not too fast for fast air travel. However, it has a relatively high processing feed rate (30 to 60 m/min) and high acceleration and deceleration.
(3) It has a good high-speed, high-precision control system, and has functions such as high-precision interpolation, contour look-ahead control, high acceleration, and high-precision position control.
(4) Select CAD/CAM software for high-speed machine tools, especially for high-speed cutting molds.
In the production of molds, the application of five-axis machine tools is gradually increasing. The high-speed cutting molds have the following advantages: 1 can change the cutting angle of the tool, good cutting conditions, reduce tool wear, help protect the tool and extend the life of the tool; 2 flexible processing route Reduce tool interference, can process molds with complex surface shapes and deep cavity molds; 3 large processing range, suitable for many types of mold processing.
Five-axis machines are usually available in both work bench and mill head five-axis machines and can be selected for mold types. In the milling head type five-axis machine tool, the five-axis machine tool that can replace the milling head and replace the electric spindle head can be used for roughing and finishing of the mold respectively.
Tool technology for high speed cutting dies
High-speed machining requires a suitable tool. The application of cemented carbide coated tools and polycrystalline reinforced ceramic tools makes it possible to combine high-hardness blades and high-toughness substrates, which promotes the development of high-speed machining. The hardness of polycrystalline cubic boron nitride (PCBN) inserts can reach 3500~4500HV, and the hardness of polycrystalline diamond (PCD) can reach 6000~10000HV. In recent years, Germany's SCS, Japan's Mitsubishi (Kobelco) and Sumitomo, Switzerland's Sandvik, the United States Kenner Feishuo and other famous foreign tool companies have launched their own high-speed cutting tools, not only high-speed cutting of ordinary structural steel tools, but also Superhard tools such as ceramic tools for direct high-speed cutting of hardened steel, especially coated tools, play a huge role in the semi-finishing and finishing of hardened steel.
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