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A Long Back Shank Large Diameter Internal Gear Broach

A technology of internal gear and large diameter, which is applied in gear tooth manufacturing tools, gear tooth manufacturing devices, belts/chains/gears, etc. It can solve problems such as safety production accidents, broach breakage, and broach scrapping to achieve safety Guarantee, reduce the use of materials, and reduce the effect of tool manufacturing costs

Active Publication Date: 2017-06-23
EST TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the fine-drawing and expanding gear sleeve 3 is arranged on the outer wall of the rear end of the rough broach body 2, there is a large diameter drop in the front and rear sections of the rough broach body 2 regardless of the outer circle or the inner hole. During the heat treatment and quenching process due to temperature changes The stress concentration at the step caused by asynchrony is prone to quenching cracks or potential hidden dangers of broach breakage caused by stress release during application, which will inevitably cause losses such as scrapping of the broach and damage to the machine tool. What is more serious may be caused by this Causing production safety accidents

Method used

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  • A Long Back Shank Large Diameter Internal Gear Broach
  • A Long Back Shank Large Diameter Internal Gear Broach

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] Such as figure 2 As shown, the large-diameter internal gear broach with long back handle of the present invention is an assembled structure, consisting of a front handle 1, a rough broach body 9 (hollow type), an extended back handle 10, a fine-drawing and expanding gear sleeve 11, and a cylindrical pin 12. Flat key 6, spacer 7, compression nut 13, set screw 8, etc. are assembled through precision machining. The rough broach body 9 is in the form of a single-diameter through hole and a straight cylinder with uniform wall thickness and an outer circle with equal tooth rise changes, which improves the heat treatment process performance. The front handle 1 and the extended rear handle 10 are bolted to the two ends of the rough broaching tool body 9 respectively, wherein the extended rear handle 10 and the rough broaching tool body 9 are limited in the circumferential direction by cylindrical pins 12, so that the extended rear handle 10 The guide tooth 101 of the belt is ...

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PUM

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Abstract

The invention discloses a large-diameter internal gear broach with a long back shank, which comprises a front shank, a rough broach body, a fine-drawing tooth expansion tool sleeve and a back handle, the back handle is an elongated back handle, and the rough broach body is straight cylindrical , the front handle and the rear handle are respectively fixedly connected to the two ends of the rough broaching tool body, and the fine drawing and expanding gear cutter is sleeved on the outer wall of the rear handle. The tool holder and the rear handle are limited in the circumferential direction by a flat key. The invention can fully avoid the potential hidden danger of tool breakage during the application process of tool heat treatment, quenching and broaching, can ensure process safety, and ensure the existing precision and performance of the tool.

Description

technical field [0001] The invention relates to a large-diameter internal gear broach with a long back shank structure, in particular to a large-diameter internal gear broach in the form of a structure in which a fine-drawing and expanding gear sleeve is directly installed on the outer wall of the broach back shank. Background technique [0002] Compared with traditional processing techniques such as gear shaping, large-diameter internal gear broaching has become the mainstream manufacturing process choice in mass production due to its extremely high production efficiency. Large-diameter internal gear broaches generally have an outer circle of more than 200mm. In order to improve the heat treatment hardenability of the broach and reduce the self-weight of the broach, the broach body is usually hollow, and the broach generally adopts an assembled structure, such as figure 1 As shown, it is assembled from a front handle 1, a progressive rough broaching tool body 2, a same-pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23F21/26
Inventor 何勤松陈子彦杨益波孙洪卫顾拥民
Owner EST TOOLS
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