Torsional vibration combined cold extrusion die

Abstract

The invention discloses a torsional vibration combined cold extrusion die which comprises a forming mechanism, an axial vibration generation mechanism and a torsional vibration generation mechanism. The axial vibration generation mechanism comprises an axial vibration generator, a connection plate and a supporting plate. The axial vibration generator is composed of a piston, a piston rod welding element, a cylinder barrel, an upper flange and a lower flange and is fixed between the connection plate and the supporting plate through bolts. The torsional vibration generation mechanism comprises two vibration cylinders identical in structure, and the two vibration cylinders and the axial vibration generator are identical in structure, located on the same side of the same plane and are symmetrically distributed about the symmetry axis. The axial vibration generator and the two vibration cylinders of a torsional vibration generator are controlled through independent high-frequency valves. The extrusion die can provide two vibration extrusion modes including axial vibration and torsional vibration, and the frequencies and the magnitudes of the vibration extrusion modes are controllable. Metal flow is promoted while cold extrusion parts are formed, the defect that the die can not be filled with metal is avoided, the quality of finished products is remarkably improved, and forming extrusion force is reduced.

Description

technical field [0001] The invention relates to a cold extrusion die, in particular to a torsional vibration composite cold extrusion die. Background technique [0002] As a precision plastic forming technology, cold extrusion technology has the advantages of "high quality, high output, low consumption, and low cost". It is an important symbol and reflection of a country's automobile industry level, industrialization level and even modernization level. However, when the product is produced by cold extrusion, the deformation force of the blank is significantly increased by the action of three-dimensional compressive stress. At the same time, due to the requirements for forming accuracy, the material has a large flow stress at room temperature, and its shape is relatively complicated. Die and blank The friction force between them also hinders the flow of the metal blank. The greater the friction force is in the final stage of forming, the more difficult it is for the metal to ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of the existing vibration extrusion die based on hydraulic drive, the amplitude and frequency cannot be accurately controlled, and the chatter form is single, the present invention provides a composite high-frequency chatter that can provide torsional chatter and axial chatter The vibrating cold extrusion die can promote the metal flow while ensuring the precision of the formed parts, and reduce the forming extrusion force

Images