Daily maintenance and maintenance of welding machine

17 May 2019

The electric welder uses the high-temperature arc generated by the positive and negative poles in an instant short circuit to melt the solder and the material to be welded on the electrode to achieve the purpose of combining them. The structure is very simple, it is a high-power transformer. The welding machine can be divided into two types according to the type of output power, one is AC power; the other is DC. It is made by the principle of inductance. When the inductance is turned on and off, it will produce a huge voltage change. The high-voltage arc generated by the positive and negative poles in the instant short circuit is used to melt the solder on the electrode to achieve the combination. The purpose of the welding machine can not be ignored during maintenance and maintenance. Electric welding machine routine maintenance 1. Check the welder output wiring specification, firm, and the outlet direction is close to vertical, and the angle with the horizontal must be greater than 7...

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About the value of the welding machine

11 May 2019

1. Reasonable design and free adjustment. The electric welder can select different discharge frequencies according to different metal materials to achieve the best repair effect. 2. The heat affected area is small. There is no heat input during the instant of stacking, so there is no deformation, undercut and residual stress. Local annealing will not occur and no reheating is required after repair. 3. Very small welding repair impact, the electric welder overcomes the phenomenon of ordinary argon arc welding on the periphery of the workpiece during the welding repair process. It is also safe to repair the workpiece surface without any allowance. 4. High precision of repair: the thickness of surfacing is from a few microns to a few millimeters, just grinding and polishing. 5. Welding strength: Strong bonding force due to sufficient penetration into the surface material of the workpiece. 6. Using ring precision control, The electrode is used to melt the electrode and heat the base materi...

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Analysis of the cause of electric shock on the load side of electric welding machine

05 May 2019

Direct cause analysis The kiln system Q235-A is made of steel and has good electrical conductivity. The main responsibility of the accident is that He has no special operation qualification certificate, which is an illegal welding operation. 1. He is ignorant of the most basic skills of electric welding operation. When welding, the left hand holds the hook nail, the right hand holds the welding handle, the welding hook is not in contact with the kiln body, and the load current passes through the lead wire, the welding rod, the welding rod, The hook nail, the human body, the kiln body, and the secondary side ground wire return to the electric welding machine to form a circuit for current circulation, so that the current passes through the human body, causing an electric shock death accident. If the hook of the weld is in direct contact with the kiln body, since the human body resistance is much larger than the resistance of the metal, the current through the human body is small (can be ...

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What to do if the product is distorted after ultrasonic welding

27 Apr 2019

There are three reasons for this deformation: 1). The body and the desired fusion or cover cannot match each other due to angle or curvature. 2). The product wall thickness is thin (within 2m/m) and the length exceeds 60m/m. 3). The product is deformed and distorted due to conditions such as injection molding pressure. Therefore, when our products are deformed by ultrasonic operation, it seems to be the cause of ultrasonic welding from the surface. However, this is only a result. Any factors before the plastic products are not welded, what kind of results are formed after welding. If there is no discussion on the main cause, it will take a lot of time to deal with the problem of the right medicine, and in the ultrasonic indirect conduction welding operation (referred to as remote ultrasound), the ultrasonic pressure below 6kg can not change the flexibility and inertia of the plastic. So don't try to use strong pressure to change the deformation before welding (the maximum pressure of t...

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What are the factors related to gas protection during tungsten argon arc welding?

19 Apr 2019

In the case of tungsten argon arc welding, since the argon protective layer is flexible, it is easily damaged by external factors and its protection effect is mainly related to the following factors: (1) Gas flow rate: For a nozzle with a certain aperture, the greater the gas flow rate, the stronger the ability of the protective layer to resist the influence of flowing air. However, when the flow rate is too large, the protective layer will generate irregular flow, which will easily cause the air to get involved, but the protection effect will be reduced, so the gas flow rate should be properly selected. For example, a nozzle having a pore diameter of 5-14 mm has an argon flow rate of 5-15 L/min. (2) Nozzle diameter: When the nozzle diameter and the gas flow rate increase simultaneously, the protection zone must increase. However, when the nozzle diameter is too large, some weld positions are not easy to weld or obstruct the welder's line of sight, thus affecting the welding quality. T...

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The introduction of welding inspection

13 Apr 2019

Many of the properties of welds can be tested by weld inspection, some of which are related to weld size and others to weld defects. Weld size is often extremely important because it is usually directly related to weld strength, and undersized welds may not be able to withstand the stresses at work. Weld seam defects are equally important. Defects inside or adjacent to the weld may result in the weld not achieving its intended performance, depending on the size and/or location of the underfill. Unacceptable weld defects are often referred to as weld defects, which may result in weld failure due to insufficient weld strength or stress concentration. There are many reasons why you need to perform a weld inspection. Perhaps the most fundamental reason is to determine if the weld meets the quality requirements of its intended application. In order to evaluate the weld quality, we must first prepare some form of gauge block and use it to compare various characteristics. The quality of the w...

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