Automobile out star wheel isothermal extrusion preliminary shaping device

A technology of isothermal extrusion and extraterrestrial wheel, which is applied in the direction of metal extrusion molds, etc., can solve the problems of rapid temperature drop of the workpiece, increase of hardness, and plastic deformation that cannot fill the cavity, so as to achieve uniform heating temperature, reasonable temperature, and eliminate artificial The effect of subjective influence

Inactive Publication Date: 2008-09-17
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the mold receives the heat, part of it is lost into the air, and part of it is heated by itself, so that the temperature of the workpiece drops rapidly, the hardness increases, and it is difficult to produce plastic deformation so that the cavity cannot be filled.

Method used

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  • Automobile out star wheel isothermal extrusion preliminary shaping device
  • Automobile out star wheel isothermal extrusion preliminary shaping device
  • Automobile out star wheel isothermal extrusion preliminary shaping device

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Embodiment Construction

[0021] figure 1 It is a schematic diagram of the structure of the present invention, figure 2 for figure 1 A sectional view along A-A, as shown in the figure: the isothermal extrusion preforming device for the automotive outer planetary wheel of the present embodiment includes a punch 4 and a die 5, and a positioning groove 41 is set at the contact position between the punch 4 and the workpiece 12; 4 and the die 5 are horizontally fixed and vertically movable through the guide post 6, and the die 5 is fixed on the die base 7; the punch 4 is fixed on the punch base 1 through the positioning block 3 and the base 2; the die 5 Set the cavity 51, and process the annular heating cavity 13 around the cavity 51 corresponding to the rod of the workpiece 12. The distance between the inner ring surface of the annular heating cavity 13 and the outer wall of the cavity 51 is 0.8 times the diameter of the cavity cross section. A heating device 11 is arranged in the chamber 13; the heatin...

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PUM

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Abstract

The invention discloses a pre-forming device of automobile external star wheel by isothermal extrusion, which comprises a punch and a female die, the punch and the female die are laterally fixed and vertically movably matched by means of a guide pillar. The female die is provided with a die cavity, and a heating device is arranged at the periphery of the die cavity. The heating unit is arranged at the die cavity of the invention to maintain the outer layer temperature of the mold. The pre-forming device has the advantages of greatly reducing the geothermal gradient of blank and mold, effectively lessening the thermal dispersion of blank in the forming process, achieving the extrusion pre-forming under the isothermal condition, avoiding the situation that the die cavity can not be filled due to excessively fast temperature drop, material deformation and resistance increase, thus improving the pass rate of finished products, and reducing waste.

Description

technical field [0001] The invention belongs to a forming device for an outer planetary wheel of an automobile, in particular to an isothermal extrusion preforming device for an outer planetary wheel of an automobile. Background technique [0002] The outer star wheel is one of the main parts of the automobile transmission shaft assembly. Its working conditions are extremely complicated, and it bears the complex stress of torsion and bending, as well as the additional stress and serious stress concentration. The shape and structure of the outer star wheel are relatively simple, but the stem is too slender, and the section difference between the head and the stem is relatively large, with a maximum ratio of 9, which makes forming more difficult. In addition, the metal fiber streamline requirements of the head and rod of the forging must be obvious, continuous and orderly. Therefore, the development of reasonable forging methods for this type of forgings has attracted much at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C29/04B21C25/02
Inventor 权国政周杰王梦寒朱若岭李路门正兴孟毅武川胡振志
Owner CHONGQING UNIV
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