Quick extruding and rolling reduction forming device and method for titanium alloy tube blank

Abstract

The invention provides a quick extruding and rolling reduction forming device and method for a titanium alloy tube blank. The device comprises a hydraulic cylinder, a sleeve assembly, a fixed rack, arotary turnplate and a mandrel which are successively arranged in a horizontal direction. By means of reasonable design and arrangement of a roll profile curve of a roller and a mandrel structure, thecross diameter of an oblique roller is decreased from middle to two sides, so that the roller has a certain feeding angle, a relatively large inlet taper angle and a relatively small outlet taper angle. Three oblique rollers fixed to the rotary turnplate are matched with the mandrel, so that an extruding and rolling reduction process of the tube blank is achieved. The device integrates the structural and movable characteristics of oblique rolling perforation, planetary rolling and extrusion, so that the preparation period can be shortened greatly, large plastic deformation of the metal tube blank is achieved, and a complex stress state needed by grain crushing and dynamic recrystallized grain refining is established, and therefore, the comprehensive performance of the tubular product is further improved.

Description

technical field [0001] The invention relates to the technical field of titanium alloy high-efficiency short-flow forming technology, in particular to a device and method for rapid extrusion and reduction of titanium alloy tube blanks. Background technique [0002] Titanium alloys are replacing traditional steel materials due to their high specific strength, corrosion resistance, high temperature resistance, creep resistance, and machinability. The ratio is an important basis for measuring the level of aircraft production in a country. [0003] For the preparation process of titanium alloy seamless pipe, there are mainly two traditional manufacturing processes, which are divided into drilling extrusion and cross rolling perforation. The drilling extrusion process requires drilling the forged titanium alloy billet and extruding it on a larger-tonnage extrusion machine, connecting the pipes and rolling them to prepare pipes of different specifications. The cross-rolling pierc...

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Problems solved by technology

[0004] Although the preparation process of titanium alloy pipes is basically mature, the production of titanium alloy pipes is difficult, the equipment is complex, the process is cumbersome and lengthy, the yield is low, and each stage has relatively large material loss and invisible loss. The low utilization rate of time and economic cost in the pipe production and manufacturing process severely limits the application of titanium alloy pipes in the fields of national defense, marine, and aviation

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