Technics Research On Extrusion And Precision Forging For JX1030 Back-bridge Axle Shaft Sleeve

Metal plastic working is developing towards advanced manufacturing technology. "Precise Forming" "Near Net Shape Forming" has became the trend of manufacturing. Extrusion fit working axis symmetrical parts specially; it has a little metal waste, compact interior tissue, steady dimension precision which has been the direction of plastics working. Though hot extrusion technology has a certain application history, it hasn't applied widely. This research is a kind of promotion toward the development trend.Axle shaft sleeve is a very important part of auto back bridge, when the auto working, it support many kinds of complicated variation stress. Whether the quality of the axle shaft sleeve or not is very important meaning to ensure auto's safety and improve economy benefit.The formerly technology of JX1030 axle shaft sleeve is loose tooling forging which is very obsolete. Interior hole depend on cutting working which waste time and power and the ratio of the material is low. It can't sufficient use the advantage of hot forging precision forming.This paper excogitate extrusion and precision forging technology for JX1030 axle shaft sleeve on the basis of analyzing on various forming technologies applied in domestic and overseas in recent years. The followings are the summary of main research works:1. Aiming at the structural characteristic of JX1030 axle shaft sleeve, a new hot extrusion forming technology is excogitated which applies general equipment and rod material, it applies 2 steps composite technology of upsetting-backward extrusion and expanding-forward extrusion. Compare with the loose tooling forging, new technology has obvious technique and economy benefits.2. Developing 3-D geometric modeling by CAD/CAE system called Pro/E. This parametric design will make modifying conveniently, and enhance the efficiency of creating the analytic model of die's geometry. Furthermore, it is the base of the following computer simulation.3. Applying software DEFORM, the process of extrusion has been analyzed for JX1030 axle shaft sleeve. The phenomenon of "expanding" and "necking" have been observed...