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Manufacturing method of intermediate shaft for automobile gearbox

A technology for automobile gearboxes and manufacturing methods, applied in the field of intermediate shaft manufacturing, capable of solving problems such as out-of-tolerance band structure and long manufacturing cycle of intermediate shafts, achieving high-efficiency manufacturing of metallographic structures, improving production efficiency, and omitting the isothermal normalizing process Effect

Inactive Publication Date: 2017-06-13
GUANGDONG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for manufacturing an intermediate shaft for an automobile gearbox, which effectively solves the existing technical problems of long manufacturing period of the intermediate shaft and out-of-tolerance band structure, and further realizes efficient manufacturing of the intermediate shaft and uniform metallographic structure The technical effect, and because the time-consuming and energy-consuming isothermal normalizing process is omitted, the energy-saving and environmentally friendly waste heat normalizing process is adopted, which greatly improves the production efficiency

Method used

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  • Manufacturing method of intermediate shaft for automobile gearbox
  • Manufacturing method of intermediate shaft for automobile gearbox
  • Manufacturing method of intermediate shaft for automobile gearbox

Examples

Experimental program
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Effect test

Embodiment 1

[0062] In Embodiment 1, a method for manufacturing an intermediate shaft for an automobile gearbox is provided, see Figure 6-8 , the raw material of the intermediate shaft adopts the long rod-shaped raw material 00 of low carbon alloy steel, and the manufacturing method includes the following steps:

[0063] a. Blanking, using a shearing machine 1 or a sawing machine to cut or saw the long rod-shaped raw material 00 into a short rod-shaped blanking blank 01 according to certain specifications;

[0064] b. Heating, the unloaded billet 01 is transferred to the heating furnace 2 through the conveying roller table 7 for heating, the heating temperature is controlled at 1180°C-1200°C, and the heating time is determined according to the specification of the rod-shaped billet 01 and the specific type of the heating furnace;

[0065] c, upsetting, the blanking blank 01 after heating is sent to the upset forging machine 3 by the conveying roller table 7 for upsetting, the length of th...

Embodiment 2

[0086] In embodiment two, a kind of manufacturing method of intermediate shaft for automobile gearbox is provided, see Figure 6-8 , the raw material of the intermediate shaft adopts the long rod-shaped raw material 00 of low carbon alloy steel, and the manufacturing method includes the following steps:

[0087] a. Blanking, using a shearing machine 1 or a sawing machine to cut or saw the long rod-shaped raw material 00 into a short rod-shaped blanking blank 01 according to certain specifications;

[0088] b. Heating, the unloaded blank 01 is transferred to the heating furnace 2 through the conveying roller table 7 for heating, the heating temperature is controlled at 1200°C-1230°C, and the heating time is determined according to the specification of the rod-shaped blank 01 and the specific type of the heating furnace;

[0089] c, upsetting, the blanking blank 01 after heating is sent to the upsetting machine 3 through the conveying roller table 7 for upsetting, the length of ...

Embodiment 3

[0110] In embodiment three, a method for manufacturing an intermediate shaft for an automobile gearbox is provided, see Figure 6-8 , the raw material of the intermediate shaft adopts the long rod-shaped raw material 00 of low carbon alloy steel, and the manufacturing method includes the following steps:

[0111] a. Blanking, using a shearing machine 1 or a sawing machine to cut or saw the long rod-shaped raw material 00 into a short rod-shaped blanking blank 01 according to certain specifications;

[0112] b. Heating, the unloaded billet 01 is transferred to the heating furnace 2 through the conveying roller table 7 for heating, the heating temperature is controlled at 1210°C-1240°C, and the heating time is determined according to the specification of the rod-shaped billet 01 and the specific type of the heating furnace;

[0113] c, upsetting, the blanking blank 01 after heating is sent to the upset forging machine 3 by the conveying roller table 7 for upsetting, the length o...

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Abstract

The invention provides a manufacturing method of an intermediate shaft for an automobile gearbox. The manufacturing method is characterized by comprising the following steps: a, blanking, b, heating, c, upsetting, d, three-roller rotary forging, e, cross wedge rolling, f, waste heat normalizing, and shot blasting after the waste heat normalizing to go to a subsequent procedure, wherein the length of an upsetting blank after the upsetting is 0.5-0.6 time that of a blanking blank; the length of a rotary forging blank after the rotary forging is 1.4-1.5 times that of the upsetting blank. The method effectively solves the technical problems that the existing manufacturing cycle of the intermediate shaft is long, and a banded structure is overproof; the method achieves technical effects of efficient manufacturing and uniform metallurgical structure of the intermediate shaft; in addition, since a time-consuming and energy-consuming isothermal normalizing procedure is eliminated, and an energy-saving and environmentally friendly waste heat normalizing procedure is employed, the production efficiency is greatly improved. In additions, since an excellent forging technology is adopted, the technical prejudice that the waste heat normalizing cannot be employed for conditioning heat treatment of the intermediate shaft in the field is broken.

Description

technical field [0001] The invention relates to the technical field of manufacturing intermediate shafts, in particular to a method for manufacturing an intermediate shaft for an automobile gearbox. Background technique [0002] The intermediate shaft is an extremely important part in the modern automobile gearbox, and it is in a complex stress state when it works. The working conditions of the intermediate shaft require that the intermediate shaft has high strength and fatigue resistance, and at the same time requires sufficient rigidity and toughness. In the middle of the 20th century, a new processing technology for shaft parts appeared-the cross-wedge rolling technology, which uses the rolling process to form parts, which belongs to the rotary forming technology, and can process rotary parts and stepped shafts. This technology is applied in the actual production process, and the production efficiency is high; the forming process uses continuous and local forming methods...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 张凤杰詹春毅
Owner GUANGDONG INST OF SCI & TECH