Flash welding shaping method for Beta-phase titanium alloy thin-walled ring

Abstract

The invention discloses a flash welding shaping method for a Beta-phase titanium alloy thin-walled ring. The flash welding shaping method includes the following steps: a D-shaped ring blank is loaded into a welding machine, the opening of the ring blank is closed, and a voltage of 7V to 18V is applied between both electrodes of the welding machine, so that a left end surface and a right end surface of the opening of the ring blank are heated to be melted by flash current with the current density of 20A / mm<2> to 180A / mm<2> to form lintels which explode to generate flashes; the flash burning speed of the ring blank is 2.8mm / s to 5.6mm / s, and the right end surface of the ring blank is driven to be fed toward the left end surface at the initial speed of 1.8mm / s to 2.6mm / s and the acceleration of 0.5mm / s<2> to 1.0mm / s<2> until the distance between the left end surface and the right end surface is less than or equal to 10mm; after flashing is finished, a right straight side of the ring blank is driven to move toward a left straight side of the ring blank at high speed, the left end surface and the right end surface collide with each other under the action of the upsetting force of 11KN to 17KN, so that the flash-welded thin-walled ring is formed, and moreover, under the action of the upsetting force, the pressure is kept for 20s to 30s. The method can ensure that the flashing process can continuously and stably go on, thus increasing the welding quality.

Description

technical field [0001] The invention relates to a welding method, in particular to a flash welding forming method of a β-phase titanium alloy thin-walled ring. Background technique [0002] With the increasing demand for rings in industries such as aviation, aerospace, ships, gas turbines, wind energy, nuclear energy, and bearings, rings formed by traditional rolling methods not only waste a lot of materials due to large machining allowances and low material utilization , but also keeps the cost of ring parts high. The ring parts produced by the flash welding process have less machining allowance, high material utilization rate, and greatly reduce the cost, which is conducive to the development of ring forming technology in the direction of precision forming technology. [0003] The Chinese invention patent specification CN 1233548A published on November 3, 1999 discloses a flash welding process for aluminum alloy wheels of automobiles and motorcycles. The technological pro...

AI Technical Summary

Problems solved by technology

However, in the process of welding thin-walled rings such as β-phase titanium alloy thin-walled rings by flash welding, if the distance between the two ends of the ring blank weld is not well controlled, the flash will stop, which will affect the continuous welding and welding. seam quality, in serious cases, the weldment will be scrapped

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