Cross wedge rolling forming method of hollow shaft head of automobile rear bridge

A technology for rear axles and hollow shafts of automobiles, applied in metal rolling and other directions, can solve the problems of easy lateral flow of metal, large equipment and investment, and inability to obtain parts, so as to reduce machining allowance, high material utilization rate, no shock effect

Inactive Publication Date: 2010-03-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the radial compression and axial extension are not well matched, the metal is easy to flow laterally, resulting in a large ellipse, resulting in the interruption of the rolling process or failure to obtain qualified parts
Since the rolling process is particularly prone to problems such as flattening, the parameter

Method used

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  • Cross wedge rolling forming method of hollow shaft head of automobile rear bridge
  • Cross wedge rolling forming method of hollow shaft head of automobile rear bridge
  • Cross wedge rolling forming method of hollow shaft head of automobile rear bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The cross-wedge rolling two-circle rolling forming process is adopted, and two pairs of wedges are processed on a pair of roller molds to complete the rolling of the hollow shaft head. Heat the seamless steel pipe to 950°C, penetrate the mandrel, the difference between the diameter of the mandrel and the inner diameter of the steel pipe is not more than 1mm, and send it into the first pass between the two molds through the axial pushing device. The steel pipe with the mandrel makes a rotary motion under the action of the first pair of wedges, and the middle part of the rolled piece is rolled into shape, such as image 3 shown. Then push the rolled piece into the second pair of holes in the axial direction, and the second pair of wedges will participate in the rolling and forming when the die rotates for the second time, such as Figure 4 shown. The formed hollow shaft head blank is pushed out from between the two molds by the axial pushing device, and the mandrel is e...

Embodiment 2

[0028] The cross-wedge rolling two-circle rolling forming process is adopted, and two pairs of wedges are processed on a pair of roller molds to complete the rolling of the hollow shaft head. Heat the seamless steel pipe to 1100°C, penetrate the mandrel, the difference between the diameter of the mandrel and the inner diameter of the steel pipe is not more than 1mm, and send it into the first pass between the two molds through the axial pushing device. The steel pipe with the mandrel makes a rotary motion under the action of the first pair of wedges, and the middle part of the rolled piece is rolled into shape, such as image 3 shown. Then push the rolled piece into the second pair of holes in the axial direction, and the second pair of wedges will participate in the rolling and forming when the die rotates for the second time, such as Figure 4 shown. The formed hollow shaft head blank is pushed out from between the two molds by the axial pushing device, and the mandrel is ...

Embodiment 3

[0031] The cross-wedge rolling two-circle rolling forming process is adopted, and two pairs of wedges are processed on a pair of roller molds to complete the rolling of the hollow shaft head. Heat the seamless steel pipe to 800°C, penetrate the mandrel, the difference between the diameter of the mandrel and the inner diameter of the steel pipe is not more than 1mm, and send it into the first pass between the two molds through the axial pusher device. The steel pipe with the mandrel makes a rotary motion under the action of the first pair of wedges, and the middle part of the rolled piece is rolled into shape, such as image 3 shown. Then push the rolled piece into the second pair of holes in the axial direction, and the second pair of wedges will participate in the rolling and forming when the die rotates for the second time, such as Figure 4 shown. The formed hollow shaft head blank is pushed out from between the two molds by the axial pushing device, and the mandrel is ej...

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Abstract

The invention provides a cross wedge rolling forming method of a hollow shaft head blank of an automobile rear bridge, belonging to the technical field of metal plastic shaping. The forming method comprises the steps of heating a round seamless pipe to 800-1100 DEG C, penetrating a core rod in the pipe, and sending the pipe with the core rod between two roll type moulds through an axial pushing device. The module has two pairs of wedges, the pipe is rolled firstly under the action of the first pair of wedges and then pushed to the second pair of wedges through the axial pushing device; when the module rotates for the second turn, the axial automatic positioning of a rolled piece is realized by the initial segment of the second pair of wedges, and then the whole rolled piece is formed by rolling; and the production of one hollow shaft head blank of an automobile rear bridge is finished every two turns. The cross wedge rolling forming method has the advantages of high productivity effectand material utilization rate, small machining allowance, low equipment manufacturing cost and good production environment.

Description

technical field [0001] The invention belongs to the technical field of metal plastic forming, and in particular provides a method for forming a hollow shaft head blank of a rear axle of a truck by cross wedge rolling, which is suitable for the production of hollow shaft blanks rolled by cross wedge rolling with a mandrel. technical background [0002] like figure 1 As shown, the hollow axle head of the automobile rear axle is one of the important parts of the automobile. It is both a load-bearing part and a force-transmitting part during the driving process of the vehicle, which directly affects the safety, load-carrying capacity and effective service life of the vehicle. [0003] All the hollow shaft heads for truck axle housings at home and abroad are basically produced by forging process. Cross wedge rolling is an advanced technology for forming shaft parts. At present, it mainly rolls solid shafts, and is rarely used on hollow shafts, and is limited to hollow shafts wit...

Claims

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Application Information

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IPC IPC(8): B21B1/08
Inventor 杨翠苹胡正寰牛庆宝颜世公张康生
Owner UNIV OF SCI & TECH BEIJING
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