Stepped cutter and inner cooling hole position design method thereof

Abstract

The invention discloses a stepped cutter and an inner cooling hole position design method thereof. The stepped cutter comprises a small-diameter cutting part, a stepped cutting part and a handle part which are sequentially arranged, the stepped cutting part is provided with a stepped cutting edge, at least one set of spiral grooves and spiral inner cooling holes corresponding to the spiral grooves, the stepped cutting edge is arranged at the transition position of the small-diameter cutting part and the stepped cutting part, the spiral groove extends to the rear cutter surface of the small-diameter cutting part from the connection position of the stepped cutting part and the handle part, the spiral inner cooling hole extends to the stepped cutting part from the handle part, and a water outlet is located in the spiral groove and is adjacent to the stepped cutting edge, cooling is sufficient, chip removal is smooth, and the quality of the machined surface is good; and the step cutter inner cooling hole position design method comprises the steps that the reasonable angle range of an auxiliary cutting edge spiral angle beta 2 meeting the design requirement is calculated, the auxiliary cutting edge spiral angle beta 2 is designated, and the method is accurate, efficient, stable and reliable.

Description

Technical field[0001]The present invention mainly relates to the field of metal cutting processing, and more particularly to a stepwise cutter and an inner cold hole position design method thereof.Background technique[0002]In the field of metal cutting processing, the stepper tool is a class of applications that have a wide range of tools, and common stepped tools include ladder drills, ladder hinges, composite step tools, and the like, and the stepwise tool can greatly improve processing efficiency.[0003]In the stepwise process, when the step cutting edge cuts into the workpiece, the cut force will suddenly occur. If the chips cannot be discharged smoothly, it is easy to make a broken blade, and therefore, in theoretical, the inner cold hole outlet is closer. The step cutting edge is conducive to the discharge of the chip, so that the cutting process can be carried out smoothly. However, ladder tools are difficult to accurately control in actual production and processing, and it is...

AI Technical Summary

Problems solved by technology

However, in the actual production and processing of stepped tools, it is difficult to accurately control the water outlet position of the internal cooling hole in the large-diameter spiral groove. Usually, only the "trial and error" method can be used for trial production, which not only reduces the processing efficiency, but also easily occurs. The internal cooling hole is "worn through" to produce waste products and increase production costs, especially for stepped tools with a blade diameter of the stepped cutting part that is twice as large as the small diameter cutting part, how to design the water outlet of the internal cooling hole in the spiral groove of the cutting part position within, there is little related research in the prior art

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