Fast precise semi-axle casing extruding formation process

Abstract

The technological process of fast forming precise semi-axle casing with circular rod material heated to forging temperature includes four steps of upsetting, punching hole, perforating and positive extruding. The present invention realizes the fast formation of precise semi-axle casing in only four steps. Combined male die structure is adopted to simplify the technological process of extruding hollow rod, and the present invention has high production efficiency and raised material utilization.

Description

technical field [0001] The invention belongs to the field of metal plastic forming in material processing engineering. It is used to form the half-shaft sleeve (shaft head) and its similar hollow shaft forgings. Background technique [0002] Half shaft bushings are important parts that bear heavy loads on the rear axle of trucks. In order to save fuel consumption, the car is required to increase the load-to-weight ratio, so the lighter weight stamped and welded axle housing is gradually replacing the cast axle housing, and the forged axle sleeve is gradually replacing the cast axle sleeve, so that the axle sleeve and The axle housings are firmly welded together. This is why the demand for forged half-shaft casings has increased significantly year by year in recent years. It is difficult to form and improve the precision of such a slender relatively large hollow transparent forging. At present, there are two main forging processes: one is to use seamless steel pipes for u...

AI Technical Summary

Problems solved by technology

The upsetting and extrusion method of seamless steel pipes cannot form forgings with larger flanges at the end. In addition, the material price is high, the production cost is high, and the application range is shrinking

There are two main problems in the other process: one is that the forming inner hole adopts the reverse extrusion method, the extrusion punch is longer (not less than the height of the forging), the length is relatively large, it is easy to deform during work, and the service life is low. The punches need to be replaced frequently in production, which has become the main factor restricting the increase of productivity; secondly, after the extrusion process, the business needs to set up a separate process to remove the continuous skin left by the reverse extrusion, and sometimes it needs to set up the end cutting process, not only The process is long and the material utilization rate is low

Images