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Broach with bionic structure

A bionics and knife-tooth technology, applied in broaches, broaching machines, manufacturing tools, etc., can solve the problems of rapid tool failure, reduce the contact area of ​​broach chips, etc., achieve reliable performance, high cost performance, and avoid the reduction of lubrication performance Effect

Inactive Publication Date: 2017-11-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the tool is prone to rapid failure due to mechanical and thermal wear in the high-speed cutting process, and propose a broach with a bionic structure. The surface of the knife is textured to store lubricant and reduce the contact area of ​​the broach chip to improve the cutting performance of the broach

Method used

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  • Broach with bionic structure
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  • Broach with bionic structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like image 3As shown, the pits are arranged equidistantly along the longitudinal direction of the broach teeth, and are regular hexagons on the plane parallel to the top surface of the broach teeth; The included angle k is 0~5°, when k ≠ 0, the minimum depth of the intersecting surface between the bottom of the pit and the cutter tooth is 0 (that is, the intersecting surface intersects with the top surface of the cutter tooth); in this embodiment, k= 0 (that is, the bottom of the pit is parallel to the top surface of the tooth, and the depth of the bottom of the pit is equal everywhere). The area of ​​the pit on the top surface of the tooth is 3mm 2 .

Embodiment 2

[0039] like Figure 4 As shown, the pits are arranged equidistantly along the longitudinal direction of the broach teeth, and are circular on the plane parallel to the top surface of the broach teeth; The included angle k is 0~5°, when k≠0, the minimum depth of the intersection surface between the bottom of the pit and the cutter tooth is 0 (that is, the intersection surface and the top surface of the cutter tooth are intersected); in this embodiment, k=0 (That is, the bottom of the pit is parallel to the top surface of the knife tooth, and the depth of the bottom of the pit is equal everywhere). The area of ​​the pit on the top surface of the tooth is 3mm 2 .

Embodiment 3

[0041] like Figure 5 As shown, the pits are arranged equidistantly along the longitudinal direction of the broach teeth, and are rhombus-shaped on the plane parallel to the top surface of the broach teeth; the bottom of the pits is a straight line along the longitudinal direction of the broach teeth, and the two sides and The included angles of the top surfaces of the teeth of the broach are equal and all take values ​​within the range of 1° to 5°, and the value is 3° in this embodiment. The area of ​​the pit on the top surface of the tooth is 3mm 2 . The lubricating fluid enters the pit to form a lubricating film between the broach teeth and the workpiece; the inclined side of the pit makes the lubricating fluid tend to be thrown out during high-speed broaching of the broach teeth, thereby providing support for the broach; After the broaching is completed, the lubricating fluid is thrown out so that new lubricating fluid can be injected later to avoid the reduction of lubr...

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Abstract

The invention discloses a broach with a bionics structure. The surface with a non-smooth morphology has better wear resistance, but when the surface is positioned under severe working conditions or works for a long time, lubricating fluid with impurities in concave pits cannot be effectively drained, so that the lubricating and bearing capabilities after accumulation are greatly weakened; and so far, reports for relevant research and application of a surface texture in the aspect of the broach of a broaching machine tool have been found. A plurality of concave pits are formed in the surface of broach teeth, and the maximum depths of the concave pits are valued between 0.01mm and 1mm; and the concave pits adopt bionics groove-shaped structures. According to the broach disclosed by the invention, texture treating is performed on the surface of the broach, a lubricating agent is stored, and the contact area of band saw cutting is reduced, so that the cutting property of a band saw is improved; the concave pits are obliquely arranged, so that the lubricating fluid has a trend of being thrown out when the broach teeth broach at high speed, and further a bearing force is provided for the broach; meanwhile, by using the slopes of the concave pits, the lubricating fluid in the concave pits can be timely changed and replenished, the lubricating effect of the broach is improved, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of broaching machine tools, and relates to a broaching broach, in particular to a novel broaching broach based on bionics and having a special groove structure. Background technique [0002] With the development of modern manufacturing industry, broaching machine tools, as the basic equipment required for mechanical processing and manufacturing, have become an important part of the part processing process. Widely used, but there are various problems in many domestic broaching machines at present, such as serious heating of the broach, low strength of the blade teeth, and fast wear of the blade body, which have always been important factors affecting its high-end. [0003] At the same time, tribology has been developed by leaps and bounds. Many experts and scholars have found that the two surfaces in contact with each other are not smoother and more wear-resistant, but surfaces with a certain non-smooth shape...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23D43/00
CPCB23D43/00
Inventor 王志强倪敬孙雨晴
Owner HANGZHOU DIANZI UNIV