A method for segmental heating and spinning of sheet metal

Abstract

The invention relates to a plate segmented heating and spinning forming method. In the spinning process, according to change of shape of a spinning blank, the angle and position of an induction heateron each segment are adjusted in real time, and it is achieved that the blank is always in the heated state in the spinning process; the segmented induction heaters can also adjust the output power according to temperature feedback of different positions of the blank, the larger the diameter of the position of the blank is, the higher the needed heating power is; by inducing adjustment of the heating output power, uniform heating of the blank can be achieved, the material deformation uniformity is improved, and accordingly, the material wall thickness and diameter precision are improved; due to the fact that change of the shape of the blank is decided by the spinning roller track, the moving distance and rotation angle of the induction heaters are determined according to the spinning roller track; and the segmented induction heaters are driven by a mechanical arm, position moving and angle rotating can be completed, and continuous following heating is achieved.

Description

technical field [0001] The invention belongs to the technical field of heating spinning forming, and in particular relates to a segmented heating spinning forming method for plates. Background technique [0002] Thin-walled rotary parts are important load-bearing parts of aero-engines. As the operating temperature of parts continues to increase, the high-temperature resistance of parts materials is required to be higher and higher. Usually, high-temperature alloys and lighter intermetallic compounds are used. and other materials. Flame heating and electromagnetic induction heating are common methods of thermal spinning. Electromagnetic induction heating spinning forming method is simple and easy, energy collection is convenient, there is no environmental pollution problem, and equipment operation and maintenance are convenient, but the heating device is expensive and only suitable for pipe fittings and Hot spinning of cylindrical parts is not suitable for special-shaped par...

AI Technical Summary

Problems solved by technology

[0011] (1) The flame heating is manually operated, and the temperature uniformity is difficult to guarantee;

[0012] (2) The flame heating radiation is large, and the labor intensity is high;

[0013] (3) The flame heating efficiency is low, it takes ten minutes to heat up to 900°C, and it takes longer to heat up to 1000°C

[0014] (4) The heat radiation to the spindle box and rotary wheel of the spinning equipment is large, heating for a long time will reduce the service life of the equipment

During the sheet metal spinning forming process, the shape of the blank changes under the action of the wheel, and the blank usually has a shape such as a bell mouth during the spinning process (such as attached Figure 5 ), at this time, the distance between the inductor and the blank cannot be kept constant, and the parts far away cannot be induction heated, and the temperature of the blank is uneven, causing problems such as cracking during the forming process, resulting in product scrapping

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