Steel-top aluminium-skirt piston ring groove induction strengthened self-tempering preventor

Abstract

The invention relates to a steel-top aluminium-skirt piston ring groove induction strengthened self-tempering preventor which comprises a chuck fixed on a quenching water tank, wherein the wall plate of the quenching water tank, which is parallel to the axial line of the chuck, is provided with a connecting box in a sliding mode; the connecting box is fixedly provided with an inductor, an isolation board and a spray head; the inductor and the spray head are isolated by the isolation board; the connecting box is provided with a flowmeter; and the flowmeter is matched with the spray head. The preventor lowers the temperature of the ring groove by carrying out synchronous scanning and spraying on the first ring groove, thereby preventing the self-tempering phenomenon. The invention basically does not lower the hardness of the ring groove, raises the qualification rate of the product, prevents the hardness degradation caused by self-tempering from influencing the service life of the piston, and meets the requirement of enhancing the abradability of the steel-top aluminium-skirt piston ring groove.

Description

technical field [0001] The invention relates to an induction heat treatment device, in particular to a steel top aluminum skirt piston ring groove induction strengthening device, which belongs to the field of vehicle engine piston heat treatment. Background technique [0002] At present, induction strengthening, laser strengthening and chemical heat treatment strengthening are mainly used to strengthen the surface of steel top aluminum skirt piston ring groove. High-frequency induction heat treatment is mostly used to strengthen the steel top aluminum skirt piston ring groove of domestic railway internal combustion engine. In the process of induction strengthening, first use the clamping steel top to rotate, and fix the sensor to scan the first ring groove for induction hardening to improve the surface strength and hardness, then move the steel top in translation, and do the same for the second ring groove operation. Due to the small distance between the two ring grooves,...

AI Technical Summary

Problems solved by technology

Due to the small distance between the two ring grooves, when the second ring groove is scanned for induction strengthening, the heat conduction to the first ring groove will cause temperature rise, resulting in self-tempering, which will cause the surface hardness of the first ring groove to decrease and weaken the effect of induction strengthening occurrence of phenomenon

Process control is often used to prevent self-tempering, but the quality stability is poor

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