Gradient induction heating based thermal deformation workpiece blank heating method and machining method

Abstract

The invention discloses a gradient induction heating based thermal deformation workpiece blank heating method and a processing method and belongs to the field of meal thermoplastic forming. Accordingto the gradient induction heating based thermal deformation workpiece blank heating method and the processing method, a blank is designed according to the shape of a workpiece; parts, with different deformations, of the blank are subjected to rapid induction heating to different temperatures through a gradient induction heating coil, the temperature difference of different deformation parts of theblank is realized, and the continuity of the temperature of the surface of the blank is ensured. The plastic deformation resistance of areas hard to deformable is effectively reduced. The equipment tonnage can also be effectively reduced. Meanwhile, under the coupling effect of the temperature and deformation of the parts with the different deformations, the uniformity of the microstructure of awhole forged piece can be ensured, and the mechanical performance of a material is remarkably improved. Besides, the labor environment can be remarkably improved, the forged piece with the high dimensional precision, the uniform microstructure and excellent comprehensive performance is integrally formed, and automated and standardized production is achieved.

Description

technical field [0001] The invention belongs to the field of metal thermoplastic forming, and more specifically relates to a forging forming method based on gradient induction heating. Background technique [0002] As a key component of manufacturing equipment in aerospace, shipbuilding, mining, machinery and other fields, large components have a direct relationship to the technical level, working performance and operational reliability of the complete set of equipment. Therefore, the development of large-scale components is highly valued by various countries. Since integral forging can effectively guarantee the grain size requirements of forgings and the integrity of streamlines, it can significantly improve the service performance of components and reduce production costs. It has become the development trend of large-scale component forming and manufacturing. [0003] At present, in the overall forging process of large components, isothermal forging or hot forging is ofte...

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Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a heating method and processing method for a thermally deformed workpiece blank based on gradient induction heating. The purpose is to determine the shape of the blank according to the shape of the target workpiece, and heat Based on the deformation characteristics, the heating temperature is calculated according to different deformation areas, and the induction coil is designed according to the calculation results, so as to perform gradient induction heating for different temperatures and deformation areas, thereby solving the problem that the existing technology cannot differentiate the temperature of different parts of the billet The problem of precise control is especially suitable for solving the problem of cumbersome process during hot forging of large components, short die life, strict requirements on the performance of die materials, high requirements on equipment tonnage, high comprehensive production costs, harsh working environment, difficult to quantify process parameters, Problems such as poor material filling and uneven microstructure

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