Automatic aluminum alloy plate welding equipment with acetone cleaning device

Abstract

The invention relates to mechanical washing and welding devices, in particular to an automated aluminum alloy plate welding device with an acetone washing unit. The device consists of a welding piece, an electric arc, a spraying gun, an electric hot air blower, an inert gas pipeline, a CCD camera and the like. The negative pole of a power supply cabinet and control system is connected with the welding piece through welding electric wires, and the power supply cabinet and control system has two superposed pulses; and the CCD camera is a color CCD camera, the pixel is 250 thousand-280 thousand, and the color resolution is 420 lpi. According to the automated aluminum alloy plate welding device, the CCD camera is used for monitoring the conditions of molten pools, welding wires and weld joints when aluminum alloy thick plates are welded, so that the parameters such as pulse current and the forward speed of a welding gun are adjusted in time, and the weld joint quality of an aluminum alloy is greatly improved. Before welding is conducted, acetone is sprayed for washing, mechanical strength of the weld joints is high, and the automated aluminum alloy plate welding device is suitable for the fine machinery manufacturing industry and an aluminum alloy welding occasion with very high welding requirements.

Description

technical field [0001] The invention relates to mechanical cleaning and welding equipment, in particular to automatic aluminum alloy plate welding equipment carrying an acetone cleaning device. Background technique [0002] As we all know, the welding of aluminum alloy is different from the welding of general carbon steel, stainless steel, etc., and there are many problems to be solved. The invention solves the welding strength problem of the aluminum alloy based on the characteristics of the aluminum alloy material in welding and welding difficulties. The thermal conductivity of aluminum alloy is very large, about 2 to 4 times that of steel, and the heat resistance is very poor. Generally, aluminum alloys are not resistant to high temperature, have a large expansion coefficient, are prone to welding deformation, and the tendency of welding cracks is also obvious. The thinner aluminum alloy sheet is more difficult to weld and easier to weld through. Pores are easily produc...

AI Technical Summary

Problems solved by technology

As we all know, aluminum alloys mainly have the following problems during welding: 1. Strong oxidation ability

At the same time, the work function of the oxide film is low, and it is easy to emit electrons, resulting in unstable welding arc. Therefore, the oxide film in the welding area must be cleaned before welding.

2. Easy to produce pores

The solubility of hydrogen in aluminum increases with temperature, but compared with the freezing point, the solubility of hydrogen decreases by 20 times, so when the aluminum alloy is cooled and solidified, a large amount of hydrogen will be precipitated, so when there are inappropriate parameters or Pores are easily formed in the weld when there are problems such as improper operation

3. The expansion coefficient is large, and the tendency of thermal cracking is high

4. Alloying elements are burned and the performance of the joint is reduced

And if a hard grinding wheel is used, impurities in it will enter the weld and cause hot cracks

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