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Shunt blocking forming method for star-shaped sleeve

A technology of occlusion forming and star-shaped sleeves, which is applied in the field of star-shaped sleeve shunting and occlusion forming, can solve the problems of large grinding and machining allowances, poor dimensional accuracy, and unstable dimensions, so as to achieve small machining allowances and improve mold quality. The effects of lifespan and internal tissue density

Active Publication Date: 2012-02-15
JIANGSU SUNWAY PRECISION FORGING
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: poor dimensional accuracy, unstable size, poor surface quality, poor internal structure, large subsequent grinding and machining allowances, large tool loss, and long process. Obviously, the disadvantages outweigh the advantages.

Method used

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  • Shunt blocking forming method for star-shaped sleeve
  • Shunt blocking forming method for star-shaped sleeve
  • Shunt blocking forming method for star-shaped sleeve

Examples

Experimental program
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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings. In the figure: 1. Upper punch; 2. Upper die; 3. Workpiece; 4. Lower die; 5. Lower punch; 6. High pressure nitrogen cylinder; 7. Slider; 8. Ejector.

[0029] Take the star sleeve in a car transmission system as an example, press figure 1 said process, wherein:

[0030] 1. For sawing, choose a hot-rolled round bar with a diameter of φ38 mm, the material grade is 16MnCr5H, and adjust the cutting length to 218-219 mm;

[0031] 2. The spheroidizing annealing refers to the ordinary spheroidizing treatment that softens the steel according to the material properties and the deformation amount of the next process to meet the cold extrusion characteristics. The spheroidizing annealing process includes:

[0032] (1) Heating: The workpiece is heated to 750°C ± 10°C at a heating rate of 50°C to 100°C / hour;

[0033] (2) Heat preservation: heat preservation for four hours after reac...

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Abstract

The invention provides a shunt blocking forming method for a star-shaped sleeve. The method provided by the invention successively comprises the following process procedures: material sawing, spheroidizing annealing, shot blasting, phosphorus saponification processing, cold upsetting extruding, spheroidizing annealing, shot blasting, phosphorus saponification processing, reverse extruding, punching, incomplete annealing, shot blasting, phosphorus saponification processing and shunt blocking formation, thereby finally obtaining a product meeting the structure property and dimensional accuracy requirements. The shunt blocking forming method provided by the invention is adopted to obtain the complicated external surface of the star-shaped sleeve, thus solving the problems of large machining allowance, poor dimensional accuracy, unsatisfactory internal structure of blanks and the like. The method has the advantages of reduction in blank weight in comparison with warm forging and hot forging blank weight, small subsequent machining allowance, conservation in subsequent machining time, high dimensional accuracy, stable quality, excellent internal structure property, long service life ofa die, and high surface finish of forge pieces.

Description

technical field [0001] The invention relates to a method for forming double-spherical parts by diversion and occlusion, in particular to a method for forming star-shaped sleeves by diversion and occlusion. Background technique [0002] The star sleeve is composed of two arcs that are not at the same center of the sphere. Due to the particularity of its shape, the complexity of its process is determined. The current method of producing this type of product is: using warm forging or hot forging. The advantage is that the process flow is shorter. The disadvantages are: poor dimensional accuracy, dimensional instability, poor surface quality, poor internal structure, large subsequent grinding and machining allowances, large tool loss, and long process. Obviously, the disadvantages outweigh the advantages. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned defects, and provide a double-spherical part (star) which requires...

Claims

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Application Information

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IPC IPC(8): B23P15/00C21D1/32
Inventor 徐祥前任蓓蓓施卫兵陈爱芬
Owner JIANGSU SUNWAY PRECISION FORGING
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