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Main functions of vertical machining center

 We know that the main function of a vertical machining center is to perform metal cutting. In the process of metal cutting, the cutting tool and the material of the processed part are contradictory and constantly evolving. 

New materials require updated tools and new methods to achieve efficient processing. In order to cope with and adapt to the increasing number of difficult-to-process materials in the mechanical field and its processing performance, reasonable tool selection and optimized processing methods are particularly important for improving processing efficiency and extending tool life.

Tool chipping is undoubtedly one of the main reasons that affect the life of the tool. It minimizes the temperature of the tool tip of the cutting part and the processed area of ​​the part, prevents surface hardening of the processed part and excessive temperature of the tool tip, increases the heat dissipation area, and controls the cutting Force, can effectively avoid the phenomenon of edge chipping, thereby extending the life of the tool, the following five points can be specifically adopted.

  • First, sufficient cooling, appropriate processing line speed, effective chip breaking, and reasonable tool wrap angle are very effective for controlling the tool tip temperature. The current machining center has an internal cooling function, which should be fully utilized during machining to make the powerful high-pressure water flow away a large amount of cutting heat and ensure that the machining area is kept within a certain temperature range. At the same time, it is recommended to use the external transmission and internal cooling of the tool holder, while enhancing the cooling pressure and improving the cooling effect.
  • Second, proper control of the cutting force and cutting speed of the tool is also an effective way to reduce the temperature of the processing area and extend the life of the tool. Generally, the hard-to-machine materials are usually processed with finely ground cutting edges, smaller cutting depths and cutting widths. According to different difficult-to-machine materials, parts structure and processing equipment and other factors, it is very important to select a reasonable cutting linear speed.
  • Third, the method of processing difficult-to-machine materials will greatly affect the processing efficiency and tool life of the tool. Whether it is cycloid machining, helical interpolation or high-feed milling, the purpose is to reduce the cutting force and reduce the temperature of the cutting zone. Using the cycloidal cutting method can minimize the cutting area, minimize the actual cutting wrap angle of the tool, and extend the heat dissipation time of each tooth of the tool;
  • Fourth, to ensure the interruption of chips during processing is also an effective way to control temperature rise. Generally, a large amount of cutting heat is generated on the chips in metal processing, and effective chip breaking will cause the large amount of cutting heat generated in processing to be taken away by the chips. Normally, we don't want long chips to be generated during processing. More attention should be paid to the processing of difficult-to-machine materials, especially for roughing processes. When the rigidity of the entire processing system allows, chip breakage should be generated during the entire processing process, and the up-milling method should be used as much as possible to make the formed iron The scraps become thinner from thickness, and the iron scraps are shaped like "9", "6" or "C".
  • Fifth, maintain a proper effective tool wrap angle during machining, so that each effective machining tooth of the tool can guarantee the longest cooling time to the maximum.

Through the above five methods, it is possible to effectively process difficult-to-machine materials with high hardness, high strength, high toughness and high wear resistance, and to prevent tool chipping to the greatest extent.

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