Flash welding forming method of bearing steel thin-wall ring member

Abstract

The invention discloses a flash welding forming method of a bearing steel thin-wall ring member, and the flash welding forming method comprises the following steps of installing a D-shaped ring blank into a welding machine so as to close an opening, applying voltage of 7V to 18V between two electrodes of the welding machine, allowing the left end surface and the right end surface of the opening of the ring blank to be heated and molten through flash current with current density of 15A / mm<2> to 220A / mm<2>, and forming flash after the blasting; ensuring the flash burning speed of the ring blank to be 3.8 to 7.8mm / s, driving the right end surface of the ring blank to make acceleration feeding movement towards the left end surface through an initial speed of 2.8mm / s to 4.5mm / s and an acceleration of 1.0mm / s<2> to 2.0mm / s<2>, and guaranteeing the distance between the left end surface and the right end surface to be less than or equal to 7mm; and driving a right straight edge of the ring blank to move towards a left straight edge at a high speed, allowing the left end surface and the right end surface to be collided together under the effect of an upsetting force of 12KN to 17KN, forming a flash welding thin-wall ring member, and maintaining the pressure for 10s to 30s under the effect of the upsetting force. Due to the adoption of the flash welding forming method, the flash process can be continuously and stably carried out, so that the quality of weld seams can be improved.

Description

technical field [0001] The invention relates to a welding method, in particular to a flash welding forming method of a bearing steel 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 process adop...

AI Technical Summary

Problems solved by technology

However, in the process of welding thin-walled rings such as bearing steel 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 process of welding and the quality of the weld. , in severe cases, it will cause the weldment to be scrapped

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