Special blade for laying drilling of four fist-shaped edges

Abstract

The invention discloses a special blade for laying drilling of four fist-shaped edges. The special blade for laying drilling of the four fist-shaped edges comprises a blade body, wherein the blade body is roughly square, and is provided with an upper surface, a lower surface and side surfaces; a fastening hole which penetrates through the upper surface and the lower surface is formed in the blade body, and an obverse side boss is arranged on the periphery of the fastening hole; the four main cutting edges are formed by ridge lines of intersection between the upper surface and the side surfaces of the blade body, and correspond to the four edges of a square; the shadow of projection of the main cutting edges on the plane is in a fist shape, and every two adjacent main cutting edges are in 90-degree rotation symmetry around the central axis of the fastening hole. The special blade for laying drilling of the four fist-shaped edges has the eccentricity preventing function and the laying drilling function, can generate thin, narrow and broken drilling cuttings, has combination properties such as the hole wall smoothing property, and can effectively solve the technical problems which seriously restrict production efficiency, for example, hole accuracy cannot be easily guaranteed, blades can be easily worn, and removal of cuttings is not smooth in a major diameter / medium-length hole efficient drilling process at present; the special blade for laying drilling of the four fist-shaped edges has the advantages of being long in service life, high in machining efficiency and good in machining accuracy.

Description

technical field [0001] The invention relates to the field of metal cutting tools, in particular to a special blade for layered drilling with four fist-shaped blades. Background technique [0002] With the development of machinery manufacturing towards high-speed, high-efficiency, high-precision, and automation, and the successive emergence and wide application of various difficult-to-machine materials, drilling efficiency, drilling quality, drill life and chip breaking performance, etc., have become the evaluation tools of drills. The main index of cutting performance. The emergence of new drilling tools has made real efficient hole processing possible. [0003] At present, research on indexable drills in advanced countries such as the United States, Sweden, Germany, Japan, and South Korea has been very mature. Their products account for about 65% of the drilling tool market, and their profits are as high as 30-45%. The technology is blocked from the outside world, and the...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a special insert for layered drilling with four fist-shaped blades, which has the functions of preventing eccentricity and layered drilling, can produce thin, narrow and broken drill chips and has smoothing The comprehensive performance of the hole wall can effectively solve the technical problems that seriously restrict the production efficiency, such as difficult to guarantee the hole accuracy, easy wear of the blade, and poor chip removal during the high-efficiency drilling process of large-diameter shallow / medium-deep holes; special blades for drilling It has the characteristics of long service life, high processing efficiency and good processing accuracy.

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