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Method for manufacturing drilling bit

A drill and workpiece technology, applied in the field of drill bit manufacturing, can solve the problems that the drill bit cannot be used for finishing, the surface of the rolling drill spiral groove is rough, etc.

Inactive Publication Date: 2010-02-24
常州市万绥工具厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the shortcomings of the surface of the rolling drill helical groove being rough and the drill bit cannot be used for finishing in the above technology, and proposes a method for manufacturing the drill bit. The drill bit manufactured by this method is sharp and can be used for finishing.

Method used

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Embodiment Construction

[0028] The method for manufacturing a drill bit is characterized in that: the method steps are as follows, the outer diameter is

[0029] a. Raw grinding, grinding the rough material steel, grinding off the black skin on the surface, so that the surface of the rough material steel is smooth and has no threads, no burns, and the blank is obtained after grinding, and the water powder and oil stains are removed;

[0030] b. Groove rolling, the blank obtained in step a is rolled on the rolling machine to obtain the workpiece 1 with the edge groove, the difference between the two leaves of the workpiece 1 is less than or equal to 0.10 mm, and the symmetry of the core is δ 3 Less than or equal to 0.25 mm, the point of tangency between the arc of the groove bottom and the projection line of the main cutting edge is lower than the axis of the drill bit, and the radial circle jump of the working part to the axis δ 1 Less than or equal to 0.25mm;

[0031] c, cutting and sharpening, cut...

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Abstract

The invention belongs to the manufacturing field drilling bits, in particular a method for manufacturing a drilling bit. The method for manufacturing the drilling bit comprises the steps of snagging,slot rolling, cutting and sharpening, coarse grinding before heat treatment, heat treatment, coarse grinding of excircle, handle flat head chamfering, opening, fine grinding of excircle, edge finishing and cleaning. The invention has the advantages of low cost, excellent performance and longer service life.

Description

technical field [0001] The invention belongs to the field of drill manufacturing, in particular to a method for manufacturing a drill. Background technique [0002] The current drill bit is composed of a spiral groove part and a shank. The general drill bit is formed by rolling. The rolling drill is to extrude the spiral groove by heating the bar with a roll. The advantage is that the production efficiency is high, and the material fiber after hot rolling The finished product has good physical properties, saves raw materials and eliminates the consumption of grinding wheels. The disadvantage is that the rough surface of the spiral groove affects chip removal, the geometric formation of the spiral groove section is poor, and the precision is low. The symmetry of the two spiral grooves often fails to meet the standard and is scrapped. It can only be used for rough processing. With the improvement of processing requirements, although the rolling drill has the advantages of good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/32B21H3/10C21D1/46C21D1/18C21D9/22C23G1/24C23G1/02C23C8/48C23F17/00
Inventor 朱剑鑫
Owner 常州市万绥工具厂
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