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Classification of turning tools

Apr 25, 2019

1. Cut-Off turning tool

The cutting tool cuts the narrow and deep groove, the chip evacuation space is small, and the chip is very easy to block. In order to reduce the friction with the machined surface, both sides of the cutting part must be ground with a declination, so the strength of the root is greatly weakened. . In addition, when the cutting tool is cut closer to the center of the workpiece, the cutting speed approaches zero, which is not conducive to cutting. Therefore, cutting the turning tool is extremely easy to "knife" (cracking) during work. The advanced cutting tool generally makes the main cutting edge into a herringbone shape, and the front surface is ground into a ridge shape, so that the chips are laterally contracted and discharged stably in one direction, so as not to be blocked in the groove, and at the same time, the bottom of the cutting head is formed into a convex shape. To increase strength and stiffness

2. Forming turning tool

The forming turning tool is a special tool for processing the forming surface of the rotating body, and the blade shape is designed according to the shape of the workpiece, and can be used for processing the forming surface of the inner and outer rotating body on various lathes. When the parts are machined with a forming turning tool, the surface of the part can be formed at one time, which is easy to operate and has high productivity. After processing, it can reach the tolerance level IT8~IT10, the roughness is 10~5μm, and the high interchangeability can be guaranteed. However, the forming tool is more complicated to manufacture, the cost is higher, and the working length of the blade is wider, so it is easy to cause vibration. Forming turning tools are mainly used for processing large and medium-sized parts with medium-sized and small-sized forming surfaces.