A pulsed magnetic field generator and its working method

Abstract

The invention relates to a pulse magnetic field generator and a working method thereof. According to the pulse magnetic field generator, a single chip microcomputer outputs a direct current voltage through a D / A converter; a single-phase full-isolation rectifying and voltage regulating module is controlled by the direct current voltage to output a pulsating direct current voltage; the pulsating direct current voltage passes through a choking coil and a filtering capacitor and then charges an energy storage capacitor; the single chip microcomputer controls an electric bridge driver I through an optocoupler I and then controls the conduction of an IGBT1 and an IGBT3 to complete a forward pulse discharging process in one time; the single chip microcomputer controls an electric bridge driver II through an optocoupler II and then controls the conduction of an IGBT2 and an IGBT4 to complete a backward pulse discharging process in one time; and parameters are set through operating keys and displayed through a display screen. By virtue of the pulse magnetic field generator, internal residual stress of a metal structural part can be eliminated or relieved, and meanwhile, the service life can be prolonged, the impact resistance and abrasion performance can be improved, and the pulse magnetic field generator also can be used in the fields of workpiece demagnetization and the like.

Description

technical field [0001] The invention relates to a pulse magnetic field generator and a working method thereof, belonging to the field of mechanical electronics. Background technique [0002] At present, with the introduction of the concept of Internet +, the manufacturing industry is playing an increasingly important role, and the manufacturing industry is represented by the machinery manufacturing industry. In the process of machining, many processing procedures may form residual stress inside the material. According to the reasons for the residual stress, they are roughly divided into two categories: the first type is due to design defects or factors such as parameter and size mismatch, and forced assembly Residual stress caused by the second category is due to the self-balanced residual stress between regions within the material. [0003] In the welded structure, the second type of residual stress will be generated due to uneven heating and welding deformation at the wel...

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Problems solved by technology

However, this method will bring some adverse consequences. On the one hand, it may change the structure of the material, deteriorate its performance, and cause new safety hazards, especially for high-strength steel; on the other hand, due to the large welding structure, the overall Heat treatment requires a large heat treatment furnace or a complex heating system, and some can only do local heat treatment. Even so, it is very difficult to implement and consumes a lot of time and energy

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