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A kind of forging process of left axle shaft of automobile differential gear

An automotive differential and process technology, applied in the field of forging, can solve the problems affecting customer satisfaction, low product accuracy, long production cycle, etc., and achieve the effect of shortening production cycle, solving forging defects, and reducing blanking weight

Active Publication Date: 2020-08-25
安徽众鑫科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The left and right half shafts are a group of important shaft parts in the automobile differential. The diameter of the forging blank of this product is small. The existing forging scheme is to use the turning process to make the billet, and the bar stock φ35 is turned into φ32. The blank is then forged with a friction press. This method is costly, and the shipment per shift is low, the production cycle is long, and the product accuracy is not high, which affects customer satisfaction.

Method used

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  • A kind of forging process of left axle shaft of automobile differential gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A forging process for the left axle shaft of an automobile differential, comprising the following steps:

[0026] (1) Blanking: Use a circular saw to cut the material, and the weight error of the material is controlled within ± 3g;

[0027] (2) Heating: heat the blank to 1100°C and keep it warm for 3 hours;

[0028] (3) Forming: Design the cavity of the free forging and elongating die to ensure that the cavity of the elongating die coincides with the cavity of the final forging die, and design a positioning device to be installed on the elongating die;

[0029] (4) trimming: use a press to remove excess flash;

[0030] (5) Quenching and tempering: heat the formed part to 1100°C, keep it warm for 4 hours, quickly put it in cold water to cool to 220°C, then raise it to 720°C, keep it warm for 6 hours, cool it to room temperature in the furnace, place it for 2 days, and then heat up again Heat at 750°C for 12 hours, then cool to room temperature in air;

[0031] (6) Sho...

Embodiment 2

[0036] A forging process for the left axle shaft of an automobile differential, comprising the following steps:

[0037] (1) Blanking: Use a circular saw to cut the material, and the weight error of the material is controlled within ± 3g;

[0038] (2) Heating: heat the blank to 1120°C and keep it warm for 4 hours;

[0039] (3) Forming: Design the cavity of the free forging and elongating die to ensure that the cavity of the elongating die coincides with the cavity of the final forging die, and design a positioning device to be installed on the elongating die;

[0040] (4) trimming: use a press to remove excess flash;

[0041] (5) Quenching and tempering: heat the formed part to 1050°C, keep it warm for 3 hours, quickly put it in cold water to cool to 200°C, then raise it to 750°C, keep it warm for 7 hours, cool it in the furnace to room temperature, place it for 1 day, and heat up again To 800°C, keep warm for 9h, and cool to room temperature in air;

[0042] (6) Shot blast...

Embodiment 3

[0047] A forging process for the left axle shaft of an automobile differential, comprising the following steps:

[0048] (1) Blanking: Use a circular saw to cut the material, and the weight error of the material is controlled within ± 3g;

[0049] (2) Heating: heat the blank to 1130°C and keep it warm for 3 hours;

[0050] (3) Forming: Design the cavity of the free forging and elongating die to ensure that the cavity of the elongating die coincides with the cavity of the final forging die, and design a positioning device to be installed on the elongating die;

[0051] (4) trimming: use a press to remove excess flash;

[0052] (5) Quenching and tempering: heat the formed part to 1150°C, keep it warm for 4 hours, quickly put it in cold water to cool to 300°C, then raise it to 600°C, keep it warm for 8 hours, cool it to room temperature in the furnace, place it for 2 days, and heat up again Heat at 760°C for 10 hours, then cool to room temperature in air;

[0053] (6) Shot bla...

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Abstract

The invention provides a forging process of a left half shaft of an automobile differential mechanism and relates to the technical field of forging. The forging process includes the procedures of feeding, heating, forming, edge cutting, hardening and tempering and shot blasting. A free forging drawing-out mold cavity is designed, it is guaranteed that the drawing-out mold cavity is matched with a finish forging mold cavity, a positioning device is designed and arranged on a drawing-out mold, it is guaranteed that the drawing-out mold cavity is matched with the finish forging mold cavity, and the situation that the size of a forging stock obtained after finish forging does not meet drawing requirements due to the fact that the blank making diameter is large or small is avoided. The positioning device is designed on the drawing-out mold, the axial and radial sizes of the forging stock are controlled, the product accuracy is greatly improved, multiple forging defects caused by the fact that the blank making length is large or small are overcome, effective controllability is brought to the production process, and the output per shift is increased.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging process for the left half shaft of an automobile differential. Background technique [0002] The left and right half shafts are a group of important shaft parts in the automobile differential. The diameter of the forging blank of this product is small. The existing forging scheme is to use the turning process to make the billet, and the bar stock φ35 is turned into φ32. The blank is then forged with a friction press. This method is costly, and the shipment per shift is low, the production cycle is long, and the product accuracy is not high, which affects customer satisfaction. Contents of the invention [0003] (1) Solved technical problems [0004] Aiming at the deficiencies of the prior art, the invention provides a forging process for the left half shaft of an automobile differential, which is simple, cost-saving and can improve production efficiency. [0005] (2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/06
CPCB21K1/06
Inventor 张锦荣徐乐高黎成玉汤志清
Owner 安徽众鑫科技股份有限公司
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