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Three-sharp wood drill

A woodworking drill and drill shank technology, which is applied to wood processing tools, wood drilling tools, wood turning tools, etc. Heart effect, long service life, and the effect of avoiding knife breakage

Inactive Publication Date: 2015-02-18
常州华尔澜工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The three-pointed woodworking drill is a variant of the twist drill. When drilling holes, the drill tip in the middle of the three-pointed woodworking drill is like an awl nailed into the wood to ensure that the drill bit will not slip; however, there are the following problems when processing deep holes: 1) It is easy to produce unstable centering, resulting in low straightness of the machined hole and low surface roughness. 2) The production cost of the tool is high. 3) The overall strength of the three-point woodworking drill is not high, and the tool is easy to break during processing. broken handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] see Figure 1-Figure 3 As shown, the three-pointed woodworking drill includes a drill shank 2, a drill bit 1, and a drill neck 6 connecting the drill shank and the drill bit; the drill neck is tapered, and the drill neck and the drill shank are integrally formed. Shaped, tapered structure can bear the pressure, increase the strength of the joint between the drill shank and the drill bit, can effectively avoid the occurrence of broken tool and broken handle, and make the three-point woodworking drill have a longer service life; the peripheral surface of the drill bit Two helical cutting edges 3 are arranged on the top, and the edge and bottom of the cutting edge are cutting edges. Due to the use of two cutting edges, the cutting strength of the two cutting edges is high, which is convenient for use in high-speed cutting; the two cutting edges The junction of the edge of the cutting edge and the bottom cutting edge is provided with an outwardly protruding knife tip 4, and...

Embodiment 2

[0019] On the basis of the foregoing embodiment 1, the drill neck and the drill bit are welded. By adopting the welding form, different materials can be used for the drill shank and the drill bit, thereby saving manufacturing cost.

Embodiment 3

[0021] On the basis of the foregoing embodiment 2, the drill shank is made of No. 45 steel; the drill bit is made of cemented carbide. Tungsten carbide has high hardness and wear resistance, so that the drill bit can be used for a long time; and because the price of No. 45 steel is low, the manufacturing cost can be effectively reduced.

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Abstract

The invention relates to the technical field of cutting tools, in particular to a three-sharp wood drill. The three-sharp wood drill comprises a drill shank, a drill bit, and a drill neck for connecting the drill shank with the drill bit, wherein the drill neck is cone-shaped, and the drill neck and the drill shank are integrally formed; two spiral cutting edges are arranged on the circumference surface of the drill shank, and edge points are respectively arranged at the edges and the bottoms of the cutting edges; outwards projecting tool noses are respectively arranged at the joints of the edge points at the edges and the bottoms of the cutting edges, and the inner tool faces of the two tool noses respectively extend towards two opposite directions. The three-sharp wood drill is stable in centering, a tool and a handle are hardly broken, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of cutting tools, in particular to a three-point woodworking drill. Background technique [0002] The three-pointed woodworking drill is a variant of the twist drill. When drilling holes, the drill tip in the middle of the three-pointed woodworking drill is like an awl nailed into the wood to ensure that the drill bit will not slip; however, there are the following problems when processing deep holes: 1) It is easy to produce unstable centering, resulting in low straightness of the machined hole and low surface roughness. 2) The production cost of the tool is high. 3) The overall strength of the three-point woodworking drill is not high, and the tool is easy to break during processing. Broken handle. Contents of the invention [0003] The purpose of the present invention is to provide a three-tip woodworking drill with stable centering, not easy to break the knife and handle, and low production cost. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27G15/00
CPCB27G15/00
Inventor 许媛
Owner 常州华尔澜工具有限公司
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