Solid carbide self-centering inner-cooling deep-hole twist drill for ABS valve body

Abstract

The invention relates to a solid carbide self-centering inner-cooling deep-hole twist drill for an ABS valve body. A cutter body and a handle part are coaxial cylinders of which the same central axis serves as the center; a spiral chip groove is formed in the cutter body; a solid part except the chip groove is a cutter back; two spiral edge strips are arranged on the cutter back; an inner-cooling hole which spirally penetrates through the cutter body is formed in the front end surface at the head of the cutter body; the intersection line of the chip groove and the cutter back in the radial direction forms an end edge; the end edge is in a double-vertex-angle double-flank-face form; the center position at the 1 / 4-1 / 3 effective edge diameter of the cutter body is a central vertex angle, and the rest are cutting vertex angles; a spiral face of the chip groove, formed by using a cutting edge as a generatrix, is a rake face; the ratio of the axial groove length of the chip groove to the radial effective edge diameter of the cutter body is 10-20; a circular arc of the chip groove is formed by smoothly connecting two circular arcs with different curvature radiuses. The efficient machining and the once feed competition are achieved, and peck drilling is eliminated; the solid carbide self-centering inner-cooling deep-hole twist drill has self-centering capacity, and the requirement on the roughness of an oil way hole of the ABS valve body is met.

Description

technical field [0001] The invention relates to an integral hard alloy self-centering internal cooling deep hole twist drill for an automobile anti-lock braking system (abbreviated as ABS) valve body, which can be used for processing oil passage holes of an ABS valve body and belongs to the technical field of high-speed and high-efficiency cutting tools. Background technique [0002] Deep hole processing generally refers to hole processing in which the aspect ratio of the hole is greater than 10 times. Deep hole processing occupies a very important position in mechanical processing, but due to existing problems, it often becomes the "bottleneck" process in metal processing. Traditional deep hole processing is mainly realized by gun drilling, and its efficiency is very low. Solid carbide deep hole drilling efficiency can be 10 times or even more than that of gun drilling. However, since the deep hole cutting process is in a semi-closed state, it is prone to various problems...

AI Technical Summary

Problems solved by technology

However, due to the semi-closed state of the deep hole cutting process, various problems such as difficulty in chip removal, poor heat dissipation, poor tool rigidity, heavy load, and easy tool breakage are prone to occur.

[0003] At the same time, in order to prevent the deviation of the hole in the machining process, the current cemented carbide deep hole drilling process needs to be pre-processed with a guide drill before the deep hole drilling, and the diameter of the guide drill must be larger than the diameter of the deep hole drill, which is easy to cause holes Inscribed marks

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