Drill bit

A drill bit and flute technology, applied in the direction of twist drills, etc., can solve the problems of high drilling resistance and poor toughness, and achieve the effects of reducing drilling resistance, increasing drill strength, and positioning drill strength

Inactive Publication Date: 2016-10-05
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. This spiral groove is the chip removal groove. , the main cutting edge and the minor cutting edge are respectively formed on the front end of the flute and the side of the flute, see figure 1 , A indicates the main cutting edge, B indicates the auxiliary cutting edge, and some materials refer to the auxiliary cutting edge as the margin, and the margin mainly smooths the drilling surface. Generally, in order to facilitate the grinding of drill bits by ordinary grinders, most people use Twist drill with two flutes, in the current twist drill, the cutting 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 chisel edge at the front end of the twist drill is relatively large. Wide, so the drilling resistance is relatively large. Most twist drills are made of HSS or cemented carbide, while HSS or cemented carbide has relatively strong rigidity, but the toughness is not very good. In addition, the chip grooves produced by milling are relatively deep. Therefore, Twist drills are often broken

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specific Embodiment approach

[0005] Specific implementation method: the tooth drill is suitable for through holes or non-through holes that do not have much requirements 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. Due to the existence of the drill cuttings, the cuttings are divided into several strands, and the spiral rib itself has a certain guiding effect on the cuttings, which is good for chip removal. The balance between the two is recommended to use the spiral rib technology first, and the tooth drill technology is used for several main cutting edges. When the tooth shape is best to stagger each other, to ensure that the cutting amount of each main cutting edge is roughly the same, figure 2 It is a cross-sectional view of the drilling part of the drill bit with 3 spiral ribs distributed, and the part marked with C is the spiral rib. ...

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Abstract

A teeth drill is a drilling cutting tool, wherein several small spiral grooves or spiral ribs are designed on the basis of the chip removal slot of an existing drill bit, a smooth curve of the cutting edge of the existing drill bit is changed to be tooth form, and therefore, the drill bit can reduce drilling resistance and has certain effects of positioning and reinforcing the strength of the drill bit.

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. This spiral groove is the chip removal groove. , the main cutting edge and the minor cutting edge are respectively formed on the front end of the flute and the side of the flute, see figure 1 , A indicates the main cutting edge, B indicates the auxiliary cutting edge, and some materials refer to the auxiliary cutting edge as the margin, and the margin mainly smooths the drilling surface. Generally, in order to facilitate the grinding of drill bits by ordinary grinders, most people use Twist drill with two flutes, in the current twist drill, the cutting edges of the main cutting edge and the auxiliary cutting edge are smooth curves,...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B23B51/02
Inventor汪风珍
Owner汪风珍