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Cold-drawing molding process of spline cross shaft

A molding process and cross-axis technology, applied in the field of auto parts manufacturing, to achieve good economic and social benefits, improve productivity and yield, and reduce cutting effects

Inactive Publication Date: 2010-05-12
青岛德林万向轴承厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process has changed and innovated compared with the traditional method, it cannot completely solve many problems in the process of machining the cross shaft

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The concrete steps of this embodiment are as follows:

[0017] 1. Remove the rust and dirt on the surface of the bar for processing the cross shaft;

[0018] 2. Heat the bar to 850°C;

[0019] 3. Send it into four cold drawing machines with two sets of molds in turn, and carry out cold drawing processing through the molds, and perform eight deformations before forming; among them, the first cold drawing temperature is 850 ° C; the second cold drawing The drawing temperature is 450°C; the third cold drawing temperature is 300°C; the fourth cold drawing temperature is 200°C; the fifth cold drawing temperature is 100°C; the sixth cold drawing temperature is 90°C; The drawing temperature is 70°C; the eighth cold drawing temperature is 50°C;

[0020] 4. Heating the formed cross shaft to 180°C, and then cleaning it to get the finished product.

Embodiment 2

[0022] The concrete steps of this embodiment are as follows:

[0023] 1. Remove the rust and dirt on the surface of the bar for processing the cross shaft;

[0024] 2. Heat the bar to 920°C;

[0025] 3. Send it to four cold drawing machines with two sets of moulds, and carry out cold drawing processing through the moulds, and perform eight deformations before forming; among them, the first cold drawing temperature is 920 ° C; the second cold drawing The drawing temperature is 500°C; the third cold drawing temperature is 350°C; the fourth cold drawing temperature is 260°C; the fifth cold drawing temperature is 150°C; the sixth cold drawing temperature is 100°C; The drawing temperature is 80°C; the eighth cold drawing temperature is 60°C;

[0026] 4. Heating the molded cross shaft to 220°C, and then cleaning it to get the finished product.

Embodiment 3

[0028] The concrete steps of this embodiment are as follows:

[0029] 1. Remove the rust and dirt on the surface of the bar for processing the cross shaft;

[0030] 2. Heat the bar to 900°C;

[0031] 3. Send it to four cold drawing machines with two sets of molds in turn, and carry out cold drawing processing through the molds, and perform eight deformations before forming; among them, the first cold drawing temperature is 900 ° C; the second cold drawing The drawing temperature is 480°C; the third cold drawing temperature is 330°C; the fourth cold drawing temperature is 230°C; the fifth cold drawing temperature is 120°C; the sixth cold drawing temperature is 95°C; The drawing temperature is 75°C; the eighth cold drawing temperature is 55°C;

[0032] 4. Heating the formed cross shaft to 200°C, and then cleaning it to get the finished product.

[0033] In the above-mentioned embodiments, the cross shafts are processed by the process of the present invention, which can be pro...

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Abstract

The invention relates to a cold-drawing molding process of a spline cross shaft, which comprises the following steps of: firstly, removing rusts and sewages on the surface of a bar for processing the cross shaft, heating the bar to 850-920 DEG C; secondly, sequentially sending the bar into four cold-drawing machines respectively provided with two sets of moulds, carrying out cold-drawing processing by using the moulds, molding after cold-drawing deformations for the eighth time in the moulds; heating and cleaning after the molding to obtain the finished product. The process of the invention can be used to continuously produce cross shafts; meanwhile, the precisions of the products in the same batch are consistent, the surface roughnesses are basically same, thereby reducing the cutting, improving the productivity and the yield, lowering the production cost, saving manpower and materials and energy resources, and obtaining better social and economic benefits.

Description

technical field [0001] The invention relates to a cold drawing forming process of a splined cross shaft, which belongs to the technical field of auto parts manufacturing. Background technique [0002] Among the traditional methods of processing cross-shaft blanks, tire mold forging and milling machine forming are the most commonly used methods, but there are problems such as low utilization rate of raw materials, large processing volume, etc., and the size of processed cross-axis blanks is unstable, high reject rate, and poor quality. Unreliable. [0003] CN891022279 mentions a cross-axis temperature and hot extrusion molding process, which is firstly heating the bar to a certain temperature, and then putting it into an extrusion die for extrusion molding. Although this process has changes and innovations compared with the traditional method, it cannot completely solve many problems in the process of machining the cross shaft. Contents of the invention [0004] Aiming at...

Claims

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Application Information

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IPC IPC(8): B21C1/22
Inventor 王德林
Owner 青岛德林万向轴承厂
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