Method for carrying out progressive precision extrusion forming of thin-shelled parts with internal and external teeth based on generating method

Abstract

The invention discloses a method for carrying out progressive precision extrusion forming of thin-shelled parts with internal and external teeth based on a generating method, which comprises the following steps of: A, manufacturing a main shaft mold and a clamping roller mold; B, arranging a main shaft, a synchronous main shaft, a synchronous clamping roller shaft, a clamping roller radial feed shaft and a clamping roller axial feed shaft, installing the main shaft mold on the main shaft, and installing the clamping roller mold on the synchronous clamping roller; C, installing a preformed thin-shelled blank on the main shaft mold so that the main shaft rotates forwards, jointly enabling the clamping roller radial feed shaft and the clamping roller axial feed shaft to enter an extrusion station so that the clamping roller radial feed shaft stops feeding and the clamping roller axial feed shaft carries out feeding, and through multi-pass extrusion, completing the longitudinal forming of a thin-shelled part with internal and external teeth; and D, enabling the main shaft to rotate reversely, and finely trimming the shape of the external teeth in a rotating way. Parts obtained according to the invention are high in precision and small in rebound deformation; and meanwhile, the processing difficulty of thin-shelled cylindrical parts with internal and external teeth is reduced, and the surface roughness and hardness of teeth are improved, therefore, the method has good practicability.

Description

technical field [0001] The invention relates to an extrusion forming method, in particular to a progressive precision extrusion forming method for a thin shell part with internal and external teeth based on a generating method. Background technique [0002] Extrusion forming is a metal plastic forming processing method. Due to the high utilization rate of the material, the structure and mechanical properties of the extruded material can be improved, the operation is simple, the production efficiency is high, and compared with the metal cutting process, it has the advantages of cost saving, simple equipment and high product quality. Therefore, This process method has been widely used in various fields at home and abroad. [0003] At present, for the processing of internal gears, internal and external gears, circular thin shell parts, extrusion, pier teeth, gear punching, stamping, gear hobbing and other forming processes are usually used. [0004] 1. The traditional extrusi...

AI Technical Summary

Problems solved by technology

[0004] 1. The traditional extrusion forming method puts the metal blank into the mold cavity, and under the action of strong pressure and a certain speed, the metal is forced to extrude from the mold cavity. The process force is heavy and the equipment is heavy, and the parts after extrusion Shaped parts are prone to irregular deformation and other problems

[0005] 2. The common pier tooth process is generally used to process parts with relatively thick walls. This process is commonly used for forming splines and gears. For the pier teeth of thin shell parts, usually only internal or external teeth can be processed, and the internal and external teeth together Forming, due to the thin wall thickness of the part, it is difficult for the part to bear the axial process force of the pier teeth, resulting in instability and deformation

[0006] 3. The tooth punching process has a relatively mature process for thin-shell parts abroad, and the parts are formed better. The imported equipment is expensive, and no domestic manufacturers have been seen yet.

[0007] 4. Stamping forming, through multi-pass, multi-stage drawing die stamping forming, large equipment tonnage, large number of molds, low mold service life, and high overall cost

For thin-shell parts, the tooth profile is easily deformed due to the cutting stress of the part after hobbing, and the processing cost is higher compared with extrusion forming

Images