Vehicle gear cold extrusion process

An automotive gear and cold extrusion technology, which is applied to wheels, metal material coating technology, manufacturing tools, etc., can solve the problem of low gear precision, achieve high production efficiency, improve material utilization, and reduce the effect of process flow

Inactive Publication Date: 2017-09-29
ANHUI CAREMIC CONSULTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the precision of automobile gears is not high

Method used

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  • Vehicle gear cold extrusion process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of automobile gear cold extrusion process, comprises the following steps:

[0031] (1) detection

[0032] First, carry out chemical analysis, metallographic inspection and mechanical performance inspection on the billet, and save the qualified products for later use;

[0033] (2) Cutting

[0034] Pickling the blank for 8 minutes in a pickling pool, then rinsing once with distilled water, sawing after drying, the accuracy of the blanking size is 0.1mm, and the blanking adopts a high-precision band sawing machine, and the high-precision The thickness of the saw blade of the precision band sawing machine is 0.90mm, and the gap of the saw blade is 1.00mm;

[0035] (3) Cutting process

[0036] Then, the blank surface after blanking is cut, and the surface roughness of the blank after the cutting is 1.2um;

[0037] (4) Spheroidizing annealing

[0038] Put the cut blank into an electric furnace for annealing treatment, heat the temperature in the furnace to 600°C, ...

Embodiment 2

[0048] A kind of automobile gear cold extrusion process, comprises the following steps:

[0049] (1) detection

[0050] First, carry out chemical analysis, metallographic inspection and mechanical performance inspection on the billet, and save the qualified products for later use;

[0051] (2) Cutting

[0052] Pickling the blank for 10min in a pickling tank, then rinsing it twice with distilled water, and sawing after drying. The accuracy of the blanking size is 0.15mm, and the blanking adopts a high-precision band sawing machine. The thickness of the saw blade of the precision band sawing machine is 0.95mm, and the gap of the saw blade is 1.50mm;

[0053] (3) Cutting processing

[0054] Then, the blank surface after blanking is cut, and the surface roughness of the blank after the cutting is 1.4um;

[0055] (4) Spheroidizing annealing

[0056] Put the cut blank into an electric furnace for annealing treatment, heat the temperature in the furnace to 700°C, and then cool i...

Embodiment 3

[0066] A kind of automobile gear cold extrusion process, comprises the following steps:

[0067] (1) detection

[0068] First, carry out chemical analysis, metallographic inspection and mechanical performance inspection on the billet, and save the qualified products for later use;

[0069] (2) Cutting

[0070] Pickling the blank for 12min in a pickling tank, then rinsing it 3 times with distilled water, sawing after drying, the precision of the blanking size is 0.2mm, and the blanking adopts a high-precision band sawing machine, and the high The thickness of the saw blade of the precision band sawing machine is 1.00mm, and the gap of the saw blade is 2.00mm;

[0071] (3) Cutting processing

[0072]Then, the blank surface after blanking is cut, and the surface roughness of the blank after the cutting is 1.6um;

[0073] (4) Spheroidizing annealing

[0074] Put the cut blank into an electric furnace for annealing treatment, heat the temperature in the furnace to 800°C, and t...

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Abstract

The invention discloses a cold extrusion process for automobile gears. The blanking adopts a high-precision band sawing machine and the control of the thickness of the saw blade of the high-precision band sawing machine and the gap between the saw blades can ensure the precision of blanking. The control of the semi-vacuum electric furnace , can prevent oxidation and decarburization of workpieces, and affect the surface quality of cold extrusion processed products. Carburizing treatment after the punching can improve the precision and mechanical properties of automotive gears. The cold extrusion process of automotive gears has high precision and mechanical properties. Advantages, the market prospect is broad.

Description

technical field [0001] The invention relates to the field of automobile parts production, in particular to a cold extrusion process for automobile gears. Background technique [0002] Gear cold extrusion forging is a less cutting process with high material utilization rate, high production efficiency, low cost and suitable for mass production. From the perspective of foreign developed industrial areas, the gear precision forging production process has gone through a development process from hot die forging to cold extrusion. At present, our country is in the stage of development from hot die forging to cold extrusion production technology. [0003] CN200910056786.8 discloses a method for cold extrusion molding of pinions in automobile steering gears, which is realized through the following steps: pickling; cold drawing, straightening; sawing; tempering, shot blasting; phosphorus saponification, which can be Improve material utilization, reduce process flow, logistics turno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/30C21D1/32C23C8/22C21D9/32
CPCB21K1/30C21D1/32C21D9/32C23C8/22
Inventor 洪浩伟徐忠
Owner ANHUI CAREMIC CONSULTING CO LTD
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