VMC1370 Machining Center CNC Machining Center
The base parts are made of high-strength cast iron and aged to ensure the stability of accuracy; X, Y, Z three direction feed using large pitch, high precision and high strength ball screw, feed speed is high; The servo motor is directly connected with the lead screw using the elastic coupling to ensure the positioning accuracy of the machine. The lead screw is pre-drawn structure, which greatly reduces the influence of thermal deformation on the positioning accuracy;
(2) Choose cutting tool materials with good performance
In high-speed machine cutting, the role of metal cutting tools is no less than that of the steam engine invented by Watt. The materials used to manufacture cutting tools must have high high-temperature hardness and wear resistance, necessary bending strength, impact toughness, and chemical inertness, good processability (such as cutting, forging, and heat treatment), and are not easily deformed. At present, the main high-performance tool materials at home and abroad include metal ceramics, hard alloy coated tools, ceramic tools, polycrystalline diamond (PCD) and cubic boron nitride (CBN) tools, etc. They each have their own characteristics, adapting to different workpiece materials and cutting speed ranges. CBN is suitable for cutting high hardness quenched steel and hard cast iron, etc. When processing high hardness steel parts (50-67HRC) and cold hard cast iron, ceramic tools and CBN tools are mainly used. Ceramic tools can be used for machining workpieces with hardness below 60-65HRC, while CBN tools can be used for cutting workpieces with hardness above 65HRC; PCD is suitable for cutting metals without iron, as well as alloys, plastics, and fiberglass. When processing aluminum alloy parts, PCD and diamond film coated cutting tools are mainly used; Carbon tool steel and alloy tool steel are now only used as tools such as files, dies, and taps; Hard alloy coated cutting tools (such as TiN, TiC, TiCN, TiAIN, etc.) have high hardness and are suitable for processing a wide range of workpieces. However, their oxidation resistance temperature is generally not high, so the improvement of cutting speed is also limited. Generally, they can process steel parts within the range of 400-5000m/min. Al2O3 coating has high high-temperature hardness, and its wear resistance is better than TiC and TiN coatings when processing in the high-speed range.
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