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Toothed drill

A drilling and drill bit technology, applied in the direction of twist drills, etc., can solve the problems of high drilling resistance, poor toughness, and many twist drill breaks, etc., and achieve the effect of reducing drilling resistance

Inactive Publication Date: 2016-07-27
汪风珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the drilling holes are twist drills. Whether it is a straight shank twist drill or a tapered shank twist drill, the front end of the drill bit is made into a certain taper, and a spiral groove is milled in the working section. Some information about this spiral groove is called Chip flute, the main cutting edge and the secondary cutting edge are respectively formed on the front end of the spiral groove and the side of the spiral groove. Generally, in order to facilitate the grinding of drill bits by ordinary grinders, most people use twist drills with two spiral grooves. In the current In the twist drill, the edges of the main cutting edge and the auxiliary cutting edge are smooth curves, which leads to a wider cutting surface of the twist drill, and the wider chisel edge at the front end of the twist drill, so the drilling resistance is relatively large. The drill is made of HSS or cemented carbide, and HSS or cemented carbide is relatively rigid, but its toughness is not very good. In addition, the spiral grooves milled out are relatively deep, so twist drills often break

Method used

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Effect test

specific Embodiment approach

[0005] Specific implementation: Tooth drills are suitable for through holes or non-through holes that do not have much requirement for the smoothness of the drilling surface. From the strength of the product, the strength of the spiral rib is better than that of the spiral groove, but the chip removal ability is affected to a certain extent. The balance between the two , It is recommended to use the spiral rib technology first. When several main cutting edges adopt tooth drill technology, the tooth shape is best staggered from each other to ensure that the cutting amount of each main cutting edge is roughly the same.

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PUM

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Abstract

A toothed drill is a drilling cutting tool. The toothed drill is characterized in that a plurality of small spiral grooves or spiral ribs are added on the basis of a spiral groove of the conventional drill, so that the smooth curve of the cutting edge of the conventional drill is changed to be toothed. The drill can reduce drilling resistance and achieve a certain location effect.

Description

technical field [0001] The invention belongs to drilling cutting tools. Background technique [0002] At present, most of the drilling holes are twist drills. Whether it is a straight shank twist drill or a tapered shank twist drill, the front end of the drill bit is made into a certain taper, and a spiral groove is milled in the working section. Some information about this spiral groove is called Chip flute, the main cutting edge and the secondary cutting edge are respectively formed on the front end of the spiral groove and the side of the spiral groove. Generally, in order to facilitate the grinding of drill bits by ordinary grinders, most people use twist drills with two spiral grooves. In the current In the twist drill, the edges of the main cutting edge and the auxiliary cutting edge are smooth curves, which leads to a wider cutting surface of the twist drill, and the wider chisel edge at the front end of the twist drill, so the drilling resistance is relatively large....

Claims

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Application Information

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IPC IPC(8): B23B51/02
Inventor 汪风珍
Owner 汪风珍