Automobile hub bearings limit ring manufacturing technique and production die thereof

Abstract

The invention relates to a manufacturing technique for a snap ring of a vehicle hub bearing which includes the steps of baiting, punching technical holes, shaping, dressing, pressing an end surface, cutting a bottom, quenching and annealing; between the techniques of dressing, pressing the end surface and cutting the bottom, a set of gear-shaped upper molds with conicity above a die body are adopted for directly carrying out an gear-expansion treatment; 65Mn is adopted as the material for baiting; a workpiece is punched by a spring steel plate of 1mm; thermal treatment quenching is carried out after the workpiece is punched; the matching size Phi 85<-0.2><-0.1> of an inner diameter is the precision of IT9 grade; the largest location of Phi 92<0><+0.15> of an outer diameter is the precision of IT10 grade; besides, in the height aspect, 7.5<0><+0.3> and 3<0><+0.2> exceed the limited height warp of a deepening piece and the form of pressing the end surface is needed to be adopted for controlling the height thereof; the production die of the snap ring of the vehicle hub bearing is provided with a set of gear-shaped upper molds with conicity above the die body which can directly carry out gear-expansion treatment. The investment cost of the die is saved; the size stability of a product is improved; the combination of the working procedures and the structure of the die are optimized.

Description

【Technical field】 [0001] The invention belongs to the technical field of automobile parts production, and relates to a manufacturing process of a stop ring of an automobile hub bearing and a production mold thereof. 【Background technique】 [0002] The inner diameter of the stop ring used in the automobile hub bearing is radially matched with the outer diameter of the first-generation hub bearing with a certain amount of interference, and is positioned on the end face of the outer ring of the bearing. figure 1 It shows the working principle of the stop ring. During assembly, when the stop ring 1 and the hub bearing 2 are pressed into the steering knuckle flange, the teeth of the stop ring 1 are compressed and radially deformed. When the stop ring 1 enters the stop After moving the groove, the tooth part of the stop ring 1 will gradually rebound. When the tooth part completely enters the stop groove, the left end surface of the stop groove of the steering knuckle flange contac...

AI Technical Summary

Problems solved by technology

Due to blanking, process hole punching, and window hole punching compound mold in the existing stop ring production, the distance between the window hole and the surrounding area is relatively thin, and the convex and concave molds become vulnerable parts; in addition, after the bottom cutting, heat treatment quenching and tempering, the workpiece is easily twisted Deformation, and special multi-station presses and automatic feeding devices are required, the mold structure is complex, the production cycle is long, and the cost is high

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