Method for strengthening molded surface of auto-body panel forming die by induction heat quenching

Abstract

The invention provides a method for strengthening a molded surface of an auto-body panel forming die by virtue of induction heat quenching. The method comprises the steps of designing and processing an induction heater and cooling spray heads matched with the induction heater; configuring an induction heating power supply and a cooling liquid feeding device; mounting the induction heater and the cooling spray heads on a driving device; switching on the induction heating power supply so that the induction heater is energized and controlling the induction heater and the cooling spray heads to do space curve movement along the designed moving path so that the molded surface of the die is subjected to induction heating by virtue of the induction heater and the temperature of to-be-treated molded surface of the die is raised to above a phase transition temperature; and after a certain time is delayed, spraying the cooling liquid towards heated molded surface of the auto-body panel forming die by virtue of the cooling spray heads mounted on the driving device. By the method, the selective strengthening of different regions of the molded surface of the die can be achieved according to the conditions that the molded surface of the auto-body panel forming die has uneven distribution of loads and different failure processes.

Description

technical field [0001] The invention belongs to the technical field of heat treatment of metal materials, and in particular relates to a continuous moving induction heating quenching strengthening method for forming mold surfaces of automobile body covering parts. Background technique [0002] The body is one of the three major assemblies of a car, and it is mainly composed of stamped and formed covers. The body panel forming die has large volume, complex profile, high precision requirements, difficult manufacturing technology, high cost and long cycle. With the increasing application of high-strength steel, lightweight construction and its precise forming process, body panel forming dies need to have higher geometric accuracy, mechanical performance and service life. The application of multi-axis linkage high-precision CNC cutting machine tools ensures the geometric accuracy of the complex surface of large molds. However, under the severe working conditions of stamping hig...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a solution to the deficiencies and problems of the existing technology in the surface strengthening of the body panel forming mold, which can be based on the uneven load distribution of the body panel forming mold surface, In the case of different failure processes, the induction heating and quenching strengthening method for the surface of the automobile body panel forming mold can be selectively strengthened in different regions of the mold surface

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