Forming equipment and forming method for rear axle case and pipe fitting

Abstract

The invention discloses forming equipment and a forming method for a rear axle case and a pipe fitting. The equipment comprises a die, an axial feeding mechanism, a pressure cylinder and a gas source,wherein the die is divided into an upper die body and a lower die body, and corresponding working profiles are arranged on the upper die body and the lower die body respectively; the axial feeding mechanism is located between the working profiles and provided with a through cavity in the axial direction; the pressure cylinder is connected with the axial feeding mechanism and drives the axial feeding mechanism to move along the working profiles; the gas source is communicated with the through cavity to blow air into the working profiles. A hot gas expansion technology is adopted so that all the defects of a stamping and welding technology can be overcome, particularly, the problem of long production takt can be solved, all the defects of a casting technology can be overcome, and particularly the problem of loosening of a casting structure can be solved. In the hot gas expansion, thickness-variable plate reel pipes are adopted as raw materials, local heating is adopted for improving forming performance, high-pressure gas expands in the die, and finally the integral structure is formed through cutting and polishing.

Description

technical field [0001] The invention relates to rear axle housing forming equipment, method and pipe fittings. Background technique [0002] At present, there are mainly two forming methods for the rear axle of the chassis of medium and heavy commercial vehicles, namely stamping welding process and casting process. [0003] For the rear axle housing 1' (such as figure 1 Shown), the detailed processes of the two processes currently used are as follows: [0004] 1. Stamping welding process: [0005] Step 1: Cut the required rear axle housing digital model into two symmetrical halves, and unfold it into the required blank line, and carry out layout according to the maximum material utilization rate, and know the material utilization rate control point according to the layout result. Therefore, the piece is further divided into 3 areas with a total of 6 parts, of which the parts in area I are exactly the same as in area II, and the 4 parts in area III are exactly the same, su...

AI Technical Summary

Problems solved by technology

[0028] There are many casting defects, and the casting axle housing is prone to defects such as sand inclusions, pores, burrs, etc., the scrap rate is high, and the repair process is long;

Images