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What factors affect the processing efficiency of tungsten steel milling cutters?

Source : Suzhou Sonite Trading Co.,Ltd.    Date : 2019-02-20    Page views : Loading...

  First, the role and impact of the coating

  In the cutting process, the contact between the blade and the workpiece is easy to generate a high temperature of 800-1200 degrees. The cutting heat generated by the high temperature is transmitted to the blade, and the tool wear is transmitted to the workpiece, and the workpiece deformation chip removes the cutting heat. At the same time as the chips are discharged, the friction between the chips and the rake face of the tool causes the temperature to rise, causing crater wear on the rake face (expressed in depth), and on the other hand, the frictional heat of the flank face and the workpiece sharply rises. Causes flank wear. The coating not only maintains the strength and toughness of the tool body, but also maintains a higher hardness and wear resistance on the surface while maintaining high red hardness.

  Second, the coolant is added to the workpiece

  In high-speed milling, a vacuum is often formed around the tip end of the tool, so if the coolant is applied to the tool and it has not been flushed, it will be thrown out, and the cooling effect will not be achieved. The coolant rushes to the front and rear sides of the tool for better cooling.

  Third, MQL (micro cooling lubrication)

  A small amount of coolant is applied to the tool under high pressure gas to cool it. The degree of pollution to the environment is also reduced

  Fourth, high-speed machining contour cutting In order to obtain long tool life, it is necessary to keep the cutting edge continuous cutting for as long as possible during the milling process. In this respect, the use of contour milling is a good method, which allows The tool is always cut in one direction and the force change is small. The profiling milling path is often a mixture of up-cutting and down-cutting (zigzag), which means frequent cutting and retracting during cutting. The cutting edge and cutting process are more susceptible to the adverse effects of work load and direction changes. Changes in load and direction can cause changes in cutting forces and tool bending, causing chipping or abnormal wear.

  Fifth, in order to improve and efficiency, reciprocating cutters can be used.

  Especially in the roughing program, reciprocating milling can increase the machining time by about 1 time compared to the circumferential milling.

  Sixth, the processing effect is not good, you can try to change the knife path

  In some cases, high-speed milling is not effective, and the tool tip is easy to collapse (the cutting depth is small) and the tool generates vibration. At this time, try the side progressive method, increase the cutting depth, use the side edge milling of the tool, and choose the multi-edge type to increase the rigidity of the tool.

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