New technique for forging bracket of back axle of automobile

A new technology, the rear axle technology, is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., which can solve the problems of poor forging quality, high production cost, and difficulty in one-fire forging, etc. The effect of edge resistance, good forging quality and low production cost

Inactive Publication Date: 2007-12-26
SHANDONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For the forging production of the rear axle bracket, it is difficult to realize one-fire forging in the open forging process (that is, the whole forging process can be completed by heating the blank only once), and the material utilization rate is low, and the quality of the forging is poor; the forging quality of closed forging and High material utilization rate, but high requirements for preform, forging temperature control and preform precision, requiring special forging equipment, high investment, high mold cost, low life, and high overall production cost

Method used

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  • New technique for forging bracket of back axle of automobile

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Embodiment Construction

[0010] Figure 1 shows a cold forging diagram of an automobile rear axle bracket. The forging process is as follows: blanking - billet making (including two steps of gathering material and flattening) - pre-forging (closed flash closed die forging) - final forging (open die forging) - eager edge cutting - shaping. The process of billet making and final forging adopts the same process as that of conventional open forging. The billet making process adopts the commonly used billet making process design, including two steps of gathering and flattening. Material; the flattening step is to rotate the aggregated blank 90° along the axis to flatten both ends to obtain a preform. For the convenience of operation, the aggregate and flattening steps are usually arranged on a set of billet molds. Then pre-forge the pre-formed billet after the blank-making process. Pre-forging is the most critical process of the whole forging process. It adopts the closed-flash closed-type forging process...

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Abstract

The invention supplies a forging technology for vehicle back shaft bracket that includes blank-making process, pre-forging process, finish-forging process, hot-cutting process and shaping process. The pre-forging process adopts sealed fin closed type forging that has the advantages of closed type forging technology as well as open type forging technology that is suitable for normal forging device. The capacity of metal filled type cavity is improved and is in good forging quality.

Description

technical field [0001] The invention relates to a forging production process of an automobile rear axle bracket, belonging to the technical field of forging processing of automobile metal parts. Background technique [0002] The rear axle bracket is an important part of the car, and its structure is complex. It fastens all the parts of the suspension and the rear axle together to form the rear axle assembly and is connected with the body at the same time. The rear axle bracket requires high strength, toughness, mechanical properties and dimensional accuracy. At present, the forging process mainly includes open forging and closed forging. In the open forging process, the forging mold is provided with a flash groove, and the flash groove is open, and the forging produces flash during the forging process, and the flash plays a role in promoting the metal to fill the cavity. In the closed forging process, the forging mold has no flash groove, and the forging is directly formed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J13/02
Inventor 赵国群程联军
Owner SHANDONG UNIV
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