Precision-forging plastic molding technology of bell shell of ball-cage type universal joint

Abstract

The invention discloses a precision-forging plastic molding technology of a bell shell of a ball-cage type universal joint, comprising steps of warm-forging plastic molding and cold-forging plastic molding. The warm-forging plastic molding technology comprises the following steps: a. blanking; b. manufacturing a blank; c. coating; d. heating; e. directly extruding; f. upsetting; g. extruding reversely; h. normalizing, shaping, sand blasting, parkerising, and treating the surface by a manner of saponification; and adopting the forging plastic molding technology of combining the warm-forging plastic molding technology with the cold-forging plastic molding technology, firstly upsetting to obtain the pre-molding blanking material, secondly, extruding reversely in the chamber of the molding mold to form a ball channel and finally forming the inner spherical surface by using the cold-forging plastic molding technology. The product quality is steady, the production efficiency is improved, the production period is short, the method for adopting the machine tool after the hot-forging is replaced, the workload of the machine tool process is reduced, the precision requirements are met, the manufacturing cost and the period are reduced, and the development trend of the manufacturing field in the world is met.

Description

technical field [0001] The invention relates to a precision forging plastic forming process for a ball-cage universal joint bell-shaped shell, in particular to a plastic forming technology of warm forging and cold forging combined with forging according to the metal flow forming rule, and the preform is made by upsetting first. The billet is then reverse-extruded in the forming die cavity to form the ball lane, and finally cold forged and plastically formed to form the inner spherical spherical cage universal joint bell-shaped shell precision forging process. Background technique [0002] The constant velocity universal joint is a mechanism that can transmit motion and torque when the main and driven shafts have angular displacement. The structure of the ball cage type universal joint in the prior art is that both the bell shell and the star sleeve The centers of curvature of the six channels of the bell-shaped shell and the centers of curvature of the six channels of the st...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a precision forging plastic forming process for a cage-type universal joint bell-shaped shell, which mainly solves the problem of the existing processing technology, which involves a lot of investment in machine tools, waste of metal materials in cutting processing, low labor production efficiency, long production cycle, and difficult processing. The technical problem of high cost; according to the metal flow forming law, the combined forging plastic forming technology of warm forging and cold forging is adopted, and the preformed blank is made by upsetting first, and then back-extruded in the forming die cavity to form a ball path, and finally cold forged and plastically formed Precise Forging Technology of Ball Cage Type Universal Joint Bell Shell Forming Inner Spherical Surface

Images