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Synchronous adjusting device for cathode heating square wave generator of electron beam welding machine

A technology of square wave generator and electron beam welding, applied in electric pulse generator circuit, non-linear magnetic device/non-linear dielectric device to generate pulse, pulse generation, etc., can solve problems such as inflexibility

Pending Publication Date: 2020-04-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The energy of the electron beam can be controlled by current and voltage. For transformers with fixed coils, there are some methods to change the voltage, but they are not flexible enough.

Method used

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  • Synchronous adjusting device for cathode heating square wave generator of electron beam welding machine

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Embodiment Construction

[0018] Accompanying drawing is a kind of structure schematic diagram of the present invention, and after 89C51 single-chip microcomputer 1 is powered on, the display number in the display circuit 5 is 50, and the representation initial state PWM duty cycle is 50%, presses the button circuit 7 to increase the duty cycle button, the number on the display will increase, and the duty cycle will increase by 5 every time you press it. After the square wave is filtered by the filter circuit 3, only a square wave with a positive amplitude is left, and then it is inverted by the inverter 4, and the amplitude of the PWM wave is all Negative; 89C51 single-chip microcomputer 2 can obtain PWM waves with all positive amplitudes in the same way. The above two waves are superimposed by the addition circuit 8 to generate a new waveform. The adding circuit 8 weakens the amplitude of the alternating current, thereby changing the voltage of the circuit. The larger the duty cycle, the greater the ...

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PUM

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Abstract

The invention discloses a synchronous adjusting device for a cathode heating square wave generator of an electron beam welding machine. The device comprises an 89C51 single-chip microcomputer 1, an 89C51 single-chip microcomputer 2, a filter circuit, a phase inverter, a display circuit, a reset circuit, a key circuit and an addition circuit. The adjusting device can carry out same-frequency magnetic flux adjustment on alternating current sine waves according to the requirement of an electron beam welding machine for voltage, and finally the voltage input into an electron beam cathode is adjusted.

Description

technical field [0001] The invention relates to the technical field of electron beam welding, in particular to a synchronous adjustment device for a cathode heating square wave generator of an electron beam welding machine. Background technique [0002] Electron beam welding generates discrete electrons by heating the cathode in the electron gun, and the electrons can form an electron beam with extremely high energy density under the acceleration of a high-voltage electrostatic field and then through the focus of an electromagnetic field. Use this electron beam to bombard the workpiece, a huge Kinetic energy is converted into heat energy, which melts the workpiece at the weld. [0003] The energy of the electron beam can be controlled by current and voltage. For transformers with fixed coils, there are some methods to change the voltage, but they are not flexible enough. Contents of the invention [0004] The invention provides an adjusting device, in particular a synchro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/45H03K3/017H03K3/015
CPCH03K3/45H03K3/017H03K3/015
Inventor 叶汉民钟姿伊
Owner GUILIN UNIVERSITY OF TECHNOLOGY