Equal channel angular pressing device of ultrasonic vibration male die

Abstract

Provided is an equal channel angular pressing device of an ultrasonic vibration male die. The upper ends of pressure columns of the device are fixed to an upper die plate. A threaded hole in the upper end of the upper die plate is connected with a hydraulic plunger on a hydraulic machine. The upper ends of guide sleeves are fixedly connected with the upper die plate. The lower ends of the guide sleeves are connected with guide columns. The lower ends of the guide columns are fixedly connected with a lower die plate. The side face of a female die is fixed through a stress ring. An ultrasonic vibration device is fixedly connected between the upper end of the male die and the upper die plate. According to the device, high-intensity ultrasonic waves are input into the male die, high-frequency periodic vibration displacement is generated on the surface of the male die, uniformity of extruded elements is improved, crystal particles are refined, and the problems that according to an equal channel angular pressing die, the crystal particles are not uniform in refining and the extruded elements have cracks are solved.

Description

technical field [0001] The invention relates to the technical field of metal large plastic deformation, in particular to an equal-diameter angular extrusion device for an ultrasonic vibrating punch. Background technique [0002] Ultrafine-grained materials refer to submicron or nanoscale materials with a grain size of 100 nm to 1 um. Ultrafine-grained structure materials often exhibit a series of excellent mechanical properties, such as high strength and good toughness, wear resistance, so they are widely used in aerospace, high-rise buildings, long-span heavy-duty bridges, lightweight energy-saving vehicles, large-scale engineering mechanical. [0003] Among many refinement methods, severe plastic deformation, as a unique plastic processing method for the purpose of microstructure control, can directly obtain submicrocrystalline and nanocrystalline structures. Equal angular extrusion is currently the most effective severe plastic deformation method for preparing high-perf...

AI Technical Summary

Problems solved by technology

[0004] The existing ECAP mold has three disadvantages: 1) the surface of the prepared extrusion is prone to cracks or scratches; 2) the uniformity of the prepared sample structure and the distribution of the plastic deformation zone are not good; 3) the existing ECAP mold It is difficult for the prepared ultrafine-grained materials to reach below 200nm in scale

Images