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Capacitance energy storage type inversion spot welding method

A capacitive energy storage and inverter technology, applied in energy storage discharge welding, resistance welding equipment, welding power supply, etc., can solve problems such as ignition, excessive contact resistance, and scrapped weldments

Inactive Publication Date: 2009-07-15
SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

If the conventional energy storage spot welding power source is used for welding, sometimes the contact resistance is too large, which will cause serious "fire" phenomenon due to excessive energy concentration, resulting in the scrapping of the weldment
Even if the solder joints are positioned correctly, the resulting weld spatter cannot be avoided

Method used

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  • Capacitance energy storage type inversion spot welding method

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Embodiment Construction

[0014] The capacitive energy storage type inverter spot welding method of the present invention will be further described in detail below.

[0015] see figure 1 As shown, the capacitive energy storage type inverter spot welding machine used in the present invention includes an energy storage capacitor, an inverter, a pulse width modulation controller and an industrial computer, and the energy storage capacitor is electrically connected respectively through the inverter The pulse width modulation controller and the industrial computer, the pulse width modulation controller is also electrically connected to the inverter through a driver, and the industrial computer is also directly electrically connected to the energy storage capacitor for controlling the Capacitor working state.

[0016] Preferably, a current adopting element is also included, and the current sampling element is electrically connected to the industrial computer.

[0017] More preferably, the current adopting ...

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Abstract

The invention relates to a capacitor energy-storage inverter spot welding method comprising the following steps: (1) rectifying alternating current to charge an energy storage capacitor; (2) sending a command from an industrial control computer to switch a switch to the discharge position for the welding when a welding is started; (3) receiving the starting command by a data acquisition card to output a preset current setting signal to a setting signal input terminal of a PWM controller to start welding; (4) after amplifying a PWM signal from the PWM controller in a driving circuit, triggering a main switching tube in an inverter to control the normal working thereof, and rectifying and outputting high-frequency pulse square wave voltage from a main transformer for achieving the welding of work pieces, and meanwhile, feeding back and adjusting welding current and acquiring waveform thereof to display and print. The invention adopts the combination of capacitor energy-storage welding and inverter techniques to fully meet the welding process requirement of bridge strip and eliminate the splatter and the spark of the welding.

Description

technical field [0001] The present invention relates to the technical field of welding methods, in particular to the technical field of inverter spot welding methods, and specifically refers to a capacitor energy storage type inverter spot welding method. Background technique [0002] For dissimilar metal spot welding connections where the welding performance of the two materials is very different, and the structural shape is also very different (a thin and wide - surface piece; a thin and long - wire piece), to obtain good welding joints while controlling weld spatter is more difficult. Because the welding of surface parts and wire parts belongs to the situation of extremely asymmetrical geometric structure, and the wire parts are slender structures, the heat dissipation intensity near the bonding surface of the wire parts and surface parts through the wire part chuck is much lower than that of the upper electrode opposite part For heat dissipation, when using steady curre...

Claims

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Application Information

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IPC IPC(8): B23K11/26B23K11/11
Inventor 潘岳棠
Owner SHANGHAI HUGONG ELECTRIC WELDING MACHINE MFG
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