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Dry gear cutting technology of helical bevel gear

A spiral bevel gear and process technology, applied in the direction of belt/chain/gear, gear teeth, manufacturing tools, etc., can solve the problems of low processing efficiency, environmental pollution and high cost, and achieve high processing efficiency, reduce industrial pollution and manufacturing costs. low effect

Active Publication Date: 2010-05-12
ZHUZHOU GEAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of low processing efficiency, poor precision, high cost and environmental pollution in the traditional "wet cutting" processing technology of the spiral bevel gear cutting of the above-mentioned automobile final drive, and to provide a high processing precision, high efficiency and low cost Low-pollution dry-cutting process for spiral bevel gears

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Workpiece material selection

[0030] The material of the workpiece (tooth blank) is 22CrMoH low-carbon alloy steel, and it is formed by forging a round steel with an outer diameter of φ120mm;

[0031] 2. Tool selection

[0032] The first step: the knife blade is made of K-type ultra-fine cemented carbide, and the hardness is required to be ≥80HRC.

[0033] Step 2: Install the knife strip on the cutter head. After the knife strip is installed, the radial runout ≤ 0.0025 and the axial runout ≤ 0.025.

[0034] 3. Workpiece normalizing treatment

[0035] The first step: heating, heating the workpiece to 950°C, holding time for 120 minutes;

[0036] The second step: heat preservation, the above workpiece will be cooled to 600-630 ℃ by air cooling, and the heat preservation time is 150 minutes;

[0037] The third step: air cooling, the workpiece is naturally cooled to room temperature in the air;

[0038] After the workpiece is normalized, the hardness is: 170±10HB, ...

Embodiment 2

[0048] 1. Workpiece material selection

[0049] The material of the workpiece (tooth blank) is 20CrMnTiH low-carbon alloy steel, which is formed by die forging of round steel with an outer diameter of φ180mm;

[0050] 2. Tool selection

[0051] The first step: the knife blade is made of K-type ultra-fine cemented carbide, and the hardness is required to be ≥80HRC.

[0052] Step 2: Install the knife strip on the cutter head. After the knife strip is installed, the radial runout ≤ 0.0025 and the axial runout ≤ 0.025.

[0053] 3. Workpiece normalizing treatment

[0054] The first step: heating, heating the workpiece to 930 ℃, holding time 180 minutes;

[0055] The second step: heat preservation, the above workpiece will be cooled to 600-630 ℃ by air cooling, and the heat preservation time is 240 minutes;

[0056] The third step: air cooling, the workpiece is naturally cooled to room temperature in the air;

[0057] After the workpiece is normalized, the hardness is: 170±10HB...

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PUM

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Abstract

The invention relates to a dry gear cutting technology of a helical bevel gear, comprising the following steps: adopting round bar steel stamping with the outer diameter of 60-180mm for shaping, selecting a K-class superfine hard alloy cutter, heating a workpiece to 920-950 DEG C, preserving the temperature for 2-4h, cooling the temperature to 540-680 DEG C by air, preserving the temperature for 2-4h, cooling naturally to room temperature, lathing the workpiece after normalizing treatment to the required dimension of the gear, performing gear cutting, lathing, detecting and warehousing. The invention completely adopts dry gear cutting without the need of cutting oil and surface cleaning before heat treatment, thus reducing industrial pollution, improving processing efficiency, lowering production cost, having high precision of product gear cutting processing and short technology flow.

Description

technical field [0001] The invention relates to a gear processing technology, in particular to a gear tooth cutting processing technology of a spiral bevel gear in an automobile final reducer. Background technique [0002] The traditional processing technology of the spiral bevel gear of the main reducer of the automobile uses high-speed steel tools in the cutting process, and cools it through cooling oil during the cutting process. With the traditional cutting method, cutting oil must be added during cutting, so that the waste oil will pollute the environment. ; Due to the cooling oil attached to the surface of the product after cutting, it is necessary to increase the cleaning process for surface cleaning before heat treatment, which increases the processing process and manufacturing cost; due to the low cutting speed of the tool, the tooth surface roughness is high. This processing method has long processing time, low product precision, low production efficiency, high cos...

Claims

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Application Information

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IPC IPC(8): B23F9/00C21D1/28C21D11/00
Inventor 谢跃东雷克干张俊杰周友良宋曾凡李静镜孙月亮黄敏刘灿武包瑛刘国显
Owner ZHUZHOU GEAR CO LTD
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