Microprocessor controlled contravariant multifunctional argon arc welding machine

Abstract

The invention relates to a microprocessor controlled contravariant multifunctional argon arc welding machine which comprises a shell part, a front panel part, a rear panel part and an internal control part; the internal control part comprises a contravariant main circuit, a monotube IGBT control circuit, a driving circuit, a rectification output circuit, a tapping loop circuit, a high-frequency circuit and a panel control circuit; the monotube IGBT control circuit and the rectification output circuit are connected in series onto the contravariant main circuit; the driving circuit is connected with the monotube IGBT control circuit and the panel control circuit; the driving circuit controls on-off of the monotube IGBT control circuit under the control of the panel control circuit; the high-frequency circuit is connected with the panel control circuit and the contravariant main circuit and realizes high-frequency or non-contact arc strike during argon arc welding under the control of the panel control circuit; and the tapping loop circuit is connected with the high-frequency circuit and the contravariant main circuit. The microprocessor controlled contravariant multifunctional argon arc welding machine has three functions of pulse argon arc welding, DC argon arc welding and manual arc welding and the characteristic of multiple purposes.

Description

technical field [0001] The invention relates to a microprocessor-controlled inverter multifunctional argon arc welding machine. The welding machine has three functions of pulse argon arc welding, direct current argon arc welding and manual arc welding. One machine has multiple functions and belongs to the technical field of inverter welding machines. technical background [0002] Argon arc welding machines have a large sales volume and a wide range of applications. However, for this type of welding machine, different circuits, circuit boards and complete machine structure designs, different control principles and methods, layout and connection methods of circuit boards and complete machines, or different degrees of complexity of connection, the production process and production The process, etc. will be completely different. These will affect the performance, reliability, production efficiency and transportation costs of the product, and ultimately affect the market competi...

AI Technical Summary

Problems solved by technology

For this kind of welding machine products, if the design is not good, there will be some problems as follows: 1) The output current does not meet the requirements of the rated current on the nameplate; 2) The load continuity rate is low, and some welding machines can only reach 15-35%

Reason: The configuration of the cooling fan of the welding machine and the design of the cooling air passage of key components (such as IGBT and its radiator, fast recovery diode and its radiator, main transformer, etc.) are unreasonable

This results in a lower duty cycle for the welder to work, i.e. a shorter welding time

If the problem is serious, it will also cause the IGBT or fast recovery diode to explode or be damaged, and the inverter transformer will burn out; 3) The circuit is unstable and prone to failure; 4) The production process is complicated and the production cost is high

Images