Irregular alloy billet heating device and heating method thereof

Abstract

The invention discloses an irregular alloy billet heating device and a heating method thereof. The heating device comprises an induction heating device for heating an irregular alloy billet; an induction heating supply power source connected to the induction heating device to supply power to the induction heating device; an alloy billet rotating device located below the induction heating device. The heating method includes heating the alloy billet by a partition heating mode, and then transferring the alloy billet into a forming molding cavity. The heating device is simple in structure, capable of conducting precise control on the fillet temperature, less in oxidation, and capable of preventing grains from growth and coarseness during heating. The heating method is convenient to apply andfavorable for rapid accurate industrial production.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to an irregular alloy billet heating device and a heating method thereof. Background technique [0002] Blank soaking is one of the important links in the whole thermal deformation process, which has a direct impact on the subsequent forming process, ensuring the quality of the parts, and improving the productivity of the parts. Realizing rapid, uniform and accurate heating can not only meet the requirements of industrialized mass production It can also prevent the grain growth and coarsening during the heating process, which will affect the structure and performance of the final product. According to the different heat sources used, the heating methods mainly include flame heating, resistance heating and induction heating. Flame heating uses the heat generated by the combustion of fuels such as diesel, gas, natural gas, etc. to heat metal blanks. The source of fue...

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Problems solved by technology

According to the different heat sources used, the heating methods mainly include flame heating, resistance heating and induction heating. Flame heating uses the heat generated by the combustion of fuels such as diesel, gas, natural gas, etc. to heat metal blanks. The source of fuel is convenient and the furnace is repaired. Simple, low heating cost, wide application range for metal blanks, but poor working conditions, heavy environmental pollution, slow heating speed, and difficult to accurately control the heating quality are the main problems. Resistance heating and induction heating are based on converting electrical energy into heat energy Among them, although resistance heating has the advantages of good working environment and unlimited size and shape of metal blanks, its disadvantages are slow heating speed, low production efficiency, difficult control of heating quality, and cannot meet the rhythm of large-scale industrial production. In contrast, induction heating is more and more widely used in large-scale industrial production due to its fast heating speed, easy control of billet temperature, less oxidation, and easy realization of mechanization and automation. Due to the skin effect of the electromagnetic field, the current density along the cross-section of the billet during induction heating shows a small central current and a large surface distribution. It is usually suitable for heating round billets with regular shapes. For irregular shaped billets, it is often necessary to design special inductors. Structure, increase the electromagnetic shield, reduce the power frequency and other comprehensive means to achieve uniform heating, so that the size range of the inductor is narrow, the design is difficult, the manufacturing cost is high, and the power consumption is large.

[0003] For example, the Chinese invention patent with the Chinese patent application number 201210534961.1 discloses a uniform heating device and method for large-sized metal blanks. The device mainly includes three parts: an induction heating mechanism, a blank transfer mechanism and an air cooling mechanism. A vertically placed single induction heating coil is used to heat the blank. The heating method of the blank adopts a three-stage heating method of high-power rapid heating, medium-power temperature balance and low-power homogenization, mainly relying on the air-cooled coil to control the temperature field on the surface of the blank. control to achieve the purpose of uniform heating of large-size metal billets. Although this method can reduce the temperature difference between the inside and outside of the large-size billet heating process and achieve a uniform temperature field, it cannot meet the uniform heating of irregular shaped metal billets and the rapid and fast industrialization of large-scale production. Precise, easily automated control of heating demand

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