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Isothermal Extrusion Preforming Device for Automotive Outer Wheel

A technology of isothermal extrusion and alien wheel, applied in the direction of metal extrusion dies, etc., can solve the problems of rapid temperature drop of workpiece, plastic deformation can not fill the cavity, hardness increase, etc., achieve uniform heating temperature, eliminate human subjective influence, Reasonable temperature effect

Inactive Publication Date: 2012-02-15
CHONGQING UNIV
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  • Summary
  • 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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  • Isothermal Extrusion Preforming Device for Automotive Outer Wheel
  • Isothermal Extrusion Preforming Device for Automotive Outer Wheel
  • Isothermal Extrusion Preforming Device for Automotive Outer Wheel

Examples

Experimental program
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Embodiment Construction

[0021] figure 1 Is a schematic diagram of the structure of the invention, figure 2 for figure 1 A cross-sectional view along the AA direction, as shown in the figure: the isothermal extrusion pre-forming device for the outer planetary wheel of the automobile of this embodiment includes a convex mold 4 and a concave mold 5. The convex mold 4 is provided with a positioning groove 41 at the contact position of the workpiece 12; the convex mold 4 and the female mold 5 are horizontally fixed and longitudinally movable and matched through the guide post 6. The female mold 5 is fixedly arranged on the female mold base 7; the male mold 4 is fixedly arranged on the male mold base 1 through the positioning block 3 and the base 2; 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 dia...

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PUM

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Abstract

The invention discloses an isothermal extrusion preforming device for an automobile outer star wheel. The forming device includes a punch and a die. The punch and the die are horizontally fixed and longitudinally movable through guide posts. There is a heating device on the outer periphery. The heating device is installed at the cavity of the present invention to maintain the temperature of the outer layer of the mold, which greatly reduces the temperature gradient between the blank and the mold, effectively reduces the heat loss of the blank during the forming process, and realizes extrusion preforming at isothermal temperature. To avoid the situation that the cavity cannot be filled due to the rapid temperature drop and the increase of material deformation resistance, improve the qualified rate of finished products and reduce waste.

Description

Technical field [0001] The invention belongs to an automobile outer planet wheel forming device, and particularly relates to an isothermal extrusion pre-forming device of an automobile outer planet wheel. Background technique [0002] The extraterrestrial wheel is one of the main parts of the automobile drive shaft assembly. The working condition is extremely complicated, and it bears the complex stress of torsion and bending, the additional stress and the serious stress concentration. The shape and structure of the outer planetary wheel are relatively simple, but the shaft is too slender, and the cross section of the head and the shaft is quite different. The maximum ratio is 9, which makes the forming more difficult. In addition, the metal fiber streamline requirements of the head and rod of the forging must be obvious, continuous and organized. Therefore, the development of reasonable forging methods for this type of forging has attracted much attention at home and abroad. A...

Claims

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Application Information

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Patent Type & Authority Patents(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