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Forming method of banjo axle housing for vehicle

A molding method and integrated technology, applied in the field of vehicles, can solve the problems of large processing volume, insufficient elongation, complex processing procedures, etc., and achieve the effects of good overall rigidity and strength, enhanced fatigue resistance, and reduced welding workload.

Inactive Publication Date: 2017-12-05
WUXI CO POWER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the segmented axle housing has several disadvantages: ①The entire axle housing is composed of two castings and seamless steel pipes, the processing procedure is complicated, requires a lot of equipment, the processing volume is large, and the productivity is low
②Axle housing, bridge cover, and half-shaft bushings are processed separately, and then assembled with equipment, which is easy to cause cumulative errors
The overall accuracy is not easy to guarantee
③The weight of the whole axle housing is relatively large
However, due to the insufficient elongation of the middle section of the above-mentioned integral axle housing, triangular reinforcing welding is required during butt welding. Not easy to guarantee

Method used

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  • Forming method of banjo axle housing for vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1, blanking: select seamless steel pipes of a certain size, and cut 1000mm of them. Among them, the cross section of the seamless steel pipe is square.

[0055] Step 2, initial bulging: place the seamless steel pipe in the lower mold of the semi-finished product mold, the upper mold moves downward, and after the mold is closed, use an ultra-high pressure system to inject an ultra-high pressure liquid medium into the seamless steel pipe to make it High pressure is generated, and axial thrust is applied to both ends of the tube billet for feeding. Under the action of ultra-high pressure liquid medium and axial thrust, the seamless steel pipe material undergoes plastic deformation, and finally adheres to the inner wall of the semi-finished mold .

[0056] Step 3. Drilling: Drill a pair of symmetrical holes at a certain distance in the middle of the expanded seamless steel pipe.

[0057] Step 4. Cutting: cutting between the pair of symmetrical holes along the axial d...

Embodiment 2

[0063] Step 1, blanking: select seamless steel pipes of a certain size, and cut 1500mm of them. Among them, the cross section of the seamless steel pipe is circular.

[0064] Step 2, initial bulging: place the seamless steel pipe in the lower mold of the semi-finished product mold, the upper mold moves downward, and after the mold is closed, use an ultra-high pressure system to inject an ultra-high pressure liquid medium into the seamless steel pipe to make it High pressure is generated, and axial thrust is applied to both ends of the tube billet for feeding. Under the action of ultra-high pressure liquid medium and axial thrust, the seamless steel pipe material undergoes plastic deformation, and finally adheres to the inner wall of the semi-finished mold .

[0065] Step 3. Drilling: Drill a pair of symmetrical holes at a certain distance in the middle of the expanded seamless steel pipe.

[0066] Step 4. Cutting: cutting between the pair of symmetrical holes along the axial...

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Abstract

The invention provides a forming method of a banjo axle housing for a vehicle. The forming method comprises the steps that blanking is carried out, and a seamless steel pipe is cut off; primary expansion is carried out, the seamless steel pipe is placed into a semi-finished product mold, an ultrahigh-pressure liquid medium is injected into the seamless steel pipe, the seamless steel pipe is expanded outwards till the outer wall of the seamless steel pipe is in fit with the inner wall of the semi-finished product mold, and annealing treatment is carried out; punching is carried out, and a pair of symmetrical holes are punched in the middle of the seamless steel pipe at intervals; cutting is carried out, and particularly cutting is carried out between the pair of symmetrical holes in the axial direction of the seamless steel pipe; and final expansion is carried out, the seamless steel pipe is placed into a finished product mold, a support is inserted into a cavity of the seamless steel pipe to enable the cutting position of the seamless steel pipe is expanded and deformed till the outer wall of the seamless steel pipe is in fit with the inner wall of the finished product mold, and therefore the banjo axle housing is obtained. The banjo axle housing is better in overall rigidity and strength, the welding workload is greatly reduced, internal stress is small, and fatigue resistance strength of a workpiece is greatly improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a forming method for an integral axle housing of a vehicle. Background technique [0002] With the rapid development of my country's automobile manufacturing industry, automobiles will gradually adopt axle housings with high strength, light weight and convenient manufacture. [0003] At present, there are basically two types of structures for automobile axle housings at home and abroad, one is segmented and the other is integral. The structural characteristics of the segmented axle housing are: the middle part is composed of the axle housing and the bridge cover, and the two castings are connected by bolts. However, the segmented axle housing has several disadvantages: ① The entire axle housing is composed of two castings and seamless steel pipes, the processing procedure is complicated, it requires a lot of equipment, the processing volume is large, and the productivity is low...

Claims

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Application Information

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IPC IPC(8): B21D53/88B21D26/033
CPCB21D53/88B21D26/033
Inventor 郑再象刘军张振越王凯强陆秋懿
Owner WUXI CO POWER SCI & TECH
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