All-solid-state variable-frequency induction heating device for isothermal forging upper and lower molds and heating method

Abstract

The invention provides an all-solid-state variable-frequency induction heating device for isothermal forging upper and lower molds (of which the diameters Phi are 900-2,000 mm) and a heating method. The all-solid-state variable-frequency induction heating device comprises an oil press upper die head, an oil press upright column, an isothermal forging upper mold, an upper mold induction heating furnace, an isothermal forging lower mold, a lower mold induction heating furnace, an oil press lower carriage, a 1# all-solid-state variable-frequency induction power supply and a 2# all-solid-state variable-frequency induction power supply. The all-solid-state variable-frequency induction heating device has the advantage that the heating time of the isothermal forging molds (of which the diameters Phi are 900-2,000 mm) is shortened to 4 to 8 hours, the heating efficiency is improved, the potential energy-saving effect is great, the production efficiency is improved, the molds are heated uniformly and long in service life, the quality of product is improved, the maintenance cost is reduced, and the all-solid-state variable-frequency induction heating device has an obvious technical and economic benefit.

Description

technical field [0001] The invention relates to a φ900mm-φ2000mm isothermal forging upper and lower die all-solid frequency conversion induction heating device and heating method, belonging to the technical field of isothermal forging equipment. Background technique [0002] Isothermal forging (Isothermal-forging), as a branch of superplastic forming, is an emerging forging technology. It is widely used in the manufacture of structural parts such as spacecraft and aircraft turbine engines in the aerospace industry and key parts in the national defense industry. It can make the forgings meet the shape requirements close to the parts, reduce material consumption, and reduce processing cycle and cost. This process combines heat treatment Isothermal forgings with optimized comprehensive mechanical properties can be obtained. [0003] When the parts are heated, they are kept at the same temperature as the mold until the end of forging. This feature completely eliminates the infl...

AI Technical Summary

Problems solved by technology

[0006] 1) The temperature and power of the upper and lower molds are adjusted separately, but there will be magnetic field interference between the upper and lower induction furnaces, which makes the power control of the two independent induction heating power supplies seriously oscillating and cannot work normally;

[0007] 2) The skin effect of induction heating causes the tip of the isothermal forging die to overmelt and damage the die;

[0008] 3) The leakage magnetic field of the induction heater produces eddy currents on the column of the hydraulic press to prevent magnetic leakage

It is difficult to solve this problem by using the traditional AC-DC-AC KK thyristor parallel inverter circuit

Images