Production method for transmission shaft

A production method and transmission shaft technology, applied in the field of vehicle accessories, can solve problems affecting product quality, low yield, loose material structure and crystal density, etc.

Inactive Publication Date: 2016-05-04
张理够
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the blank is an ordinary casting, the material structure and crystal density are loose, which easily affects the quality of the product, so the yield is low and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A production method of transmission parts, it comprises the following steps:

[0022] 1) Using high-pressure nitrogen atomization to obtain stainless steel powder for molding, cold isostatic pressing under a pressure of 7.5kPa for 1h;

[0023] 2) The cold isostatic compact is hot-extruded at a temperature of 1220°C;

[0024] 3) The blank formed in step 2) is flattened on the instrument lathe and the outer circle of the car is made into a blank that meets the step 5) press mold;

[0025] 4) Heat the billet in step 3) to 860°C in an intermediate frequency induction furnace for 8 hours, then cool it to 820°C, keep it for 8 hours, and then cool it to below 200°C, then take it out of the furnace and air cool;

[0026] 5) cold-extruding the large-diameter end of the billet after step 4) on a press;

[0027] 6) Drill the center hole of the roughened billet on the instrument lathe, and after the center hole is expanded, chamfer the center hole and end face angle of the large ...

Embodiment 2

[0034] A production method of transmission parts, it comprises the following steps:

[0035] 1) The stainless steel powder obtained by high-pressure nitrogen atomization method is molded, and isostatically pressed under a pressure of 5.3kPa for 3 hours;

[0036] 2) The cold isostatic compact is hot-extruded at a temperature of 1315°C;

[0037] 3) The blank formed in step 2) is flattened on the instrument lathe and the outer circle of the car is made into a blank that meets the step 5) press mold;

[0038] 4) Heat the billet in step 3) to 840°C in an intermediate frequency induction furnace for 8 hours, then cool the furnace to 800°C, keep it for 8 hours, and then cool it to below 200°C, then take it out of the furnace and cool it in air;

[0039] 5) cold-extruding the large-diameter end of the billet after step 4) on a press;

[0040] 6) Drill the center hole of the roughened billet on the instrument lathe, and after the center hole is expanded, chamfer the center hole and e...

Embodiment 3

[0047] A production method of transmission parts, it comprises the following steps:

[0048] 1) The stainless steel powder obtained by high-pressure nitrogen atomization method is molded, and isostatically pressed under a pressure of 6.4kPa for 2 hours;

[0049] 2) The cold isostatic compact is hot-extruded at a temperature of 1257°C;

[0050] 3) The blank formed in step 2) is flattened on the instrument lathe and the outer circle of the car is made into a blank that meets the step 5) press mold;

[0051] 4) Heat the billet in step 3) to 860°C in an intermediate frequency induction furnace for 8 hours, then cool the furnace to 800°C, keep it for 8 hours, and then cool it to below 200°C, then take it out of the furnace and air cool;

[0052] 5) cold-extruding the large-diameter end of the billet after step 4) on a press;

[0053] 6) Drill the center hole of the roughened billet on the instrument lathe, and after the center hole is expanded, chamfer the center hole and end fac...

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PUM

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Abstract

Disclosed is a production method for a transmission shaft. The production method comprises the following steps that (1) powder metallurgy is conducted; (2) hot extrusion is conducted; (3) a blank according with a press machine die in the step (5) is made; (4) the blank is subjected to annealing treatment; (5) the blank is subjected to cold extrusion to be thickened; (6) a center hole is drilled in the thickened blank, chamfering is conducted after counterboring, and then outer circle turning is conducted; (7) the workpiece is subjected to spline cold extrusion; (8) then the workpiece is subjected to surface turning and chamfering; (9) then the overlong part of a small-diameter end of the workpiece is turned to be removed, and chamfering is conducted after rough surface turning; (10) the outer circle of a big-diameter end of the workpiece is subjected to outer circle turning to form the needed shape, groove cutting is conducted in the position, close to the end face, of the outer circle face of the small-diameter end, and meanwhile, the part, at the small-diameter end, of the center hole is subjected to chamfering; and (11) a finished product is obtained after the treated workpiece is subjected to flat-head chamfering and inner counterboring. Compared with the prior art, the production method has the advantages that working procedure time and raw materials are saved, the finished product rate is high, and the cost is low.

Description

[0001] Method field: [0002] The invention belongs to the field of vehicle accessories, in particular to a production method of a transmission shaft. Background technique: [0003] The steps of the production method of the transmission shaft in the prior art are generally as follows: firstly, the blank is formed by a common casting process; finally, the casting is turned into shape. However, since the blank is an ordinary casting, the material structure and crystal density are loose, which easily affects the quality of the product, so the yield is low and the cost is high. Invention content: [0004] Aiming at the above problems, the present invention provides a production method of a transmission shaft with higher yield and lower cost. [0005] The technical solution used by the present invention to solve the above problems is: a production method of a transmission part is provided, which comprises the following steps: [0006] 1) Using high-pressure nitrogen atomization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14B22F3/02
CPCB23P15/14B22F3/02
Inventor 张理够
Owner 张理够
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