Cross wedge rolling precision forming method of axle shaft sleeve

A technology of precision forming and cross wedge rolling, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of axial movement, difficulty of economical rolling of half shaft casing in cross wedge rolling, end flattening, etc. , to achieve the effect of small machining allowance, meeting performance requirements and small wall thickness deviation

Inactive Publication Date: 2015-06-10
北京科大机翔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when asymmetrically rolling a hollow part with a unidirectional reduction in diameter, the rolled piece is prone to serious end flattening and axial movement, so it is very important to realize the economical rolling of the cross-wedge rolling half-axis casing. difficulty

Method used

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  • Cross wedge rolling precision forming method of axle shaft sleeve
  • Cross wedge rolling precision forming method of axle shaft sleeve
  • Cross wedge rolling precision forming method of axle shaft sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The rolling of the hollow casing of the automobile half shaft is completed by the cross wedge rolling forming process. Take a blank with a 30° cone angle at one end (such as figure 2 ) to 1000°C, penetrate the mandrel, the difference between the diameter of the mandrel 4 and the inner diameter of the billet is about 1mm, and send it into the two molds——between the upper roller and the lower roller through the axial pusher device. The billet with the mandrel makes a rotary motion under the action of the mold, and the rolled piece 3 is rolled into shape, such as image 3 shown. After forming, the rolled piece 3 is pushed out from between the two dies by the axial pusher device, and the mandrel 4 is pushed out to obtain Figure 6 The whole process of the shown hollow semi-shaft casing blank is completed on a cross wedge rolling mill and a pair of molds.

[0029] Figure 4 , Figure 5 It is the die expansion diagram and the groove diagram of the implementation example...

Embodiment 2

[0031] Using the cross wedge rolling forming process to complete the hollow casing of the automobile half shaft (such as figure 1 ) for rolling. Take a blank with a 25° cone angle at one end (such as figure 2 ) to 900°C, penetrate the mandrel, the difference between the diameter of the mandrel and the inner diameter of the billet is about 1 mm, and send it between the two molds through the axial pushing device. The billet with the mandrel makes a rotary motion under the action of the die, and the rolled piece is rolled into shape, such as image 3 shown. After the forming is completed, the rolled piece is pushed out from between the two dies by the axial pusher device, and the mandrel is ejected to obtain Figure 6 Hollow half shaft bushing blanks shown.

[0032] Figure 4 , Figure 5 It is the die expansion diagram and the groove diagram of the implementation example of the automobile semi-axle casing blank formed by cross wedge rolling. The diameter of the top circle...

Embodiment 3

[0034] Using the cross wedge rolling forming process to complete the hollow casing of the automobile half shaft (such as figure 1 ) for rolling. Take a blank with a 35° cone angle at one end (such as figure 2 ) to 1150°C, penetrate the mandrel, the difference between the diameter of the mandrel and the inner diameter of the billet is about 1 mm, and send it between the two molds through the axial pushing device. The billet with the mandrel makes a rotary motion under the action of the die, and the rolled piece is rolled into shape, such as image 3 shown. After the forming is completed, the rolled piece is pushed out from between the two dies by the axial pusher device, and the mandrel is ejected to obtain Figure 6 Hollow half shaft bushing blanks shown.

[0035] Figure 4 , Figure 5 It is the die expansion diagram and the groove diagram of the implementation example of the automobile semi-axle casing blank formed by cross wedge rolling. The diameter of the top circle ...

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Abstract

The invention provides a cross wedge rolling precision forming method of an axle shaft sleeve. According to the technical scheme, circular hollow blank with a circular truncated cone at one end is heated to a rolling temperature, a core rod penetrates into the circular hollow blank, and the circular hollow blank is conveyed between two molds through an axial material pushing device. The design of asymmetry wedges and broadening angle and forming angle changing is used on the molds according to the principle of rolling close to a non-material end, and a reverse step is designed at the position of a close end for controlling axial movement of a rolling piece. The rolling piece is rolled to be formed under the effect of the molds, and a piece of automobile hollow axle sleeve blank is produced in each circle. According to the cross wedge rolling precision forming method of the axle shaft sleeve, the production efficiency and the material utilization rate are high, machining allowance is small, wall thickness deviation is small, waste product rate is low, and the production environment is good.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming, and in particular provides a method for precisely forming a hollow semi-shaft casing blank with a unidirectionally reduced diameter by cross-wedge rolling with a mandrel rod, which is suitable for the cross-wedge rolling half-shaft casing blank or strip method Production of prefabricated semi-shaft casings for flanges and flanges. technical background [0002] The half-axle bushing is one of the important parts on the rear axle of the car. When the car is running, it has to bear the weight of the entire body and cargo and complex alternating stress. The quality of the half-axle bushing directly affects the driving safety of the vehicle. . Therefore, its production process is required to ensure that the streamline distribution of parts is reasonable, the internal structure is dense, and it has high fatigue strength. [0003] The axle shaft casings of trucks at home and abroad are b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B19/12B21B27/02
Inventor 杨翠苹胡正寰郑振华张康生刘晋平孙星
Owner 北京科大机翔科技有限公司
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