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How To Solve The Problem Of Spot Welder Running Under Foot Welding Machine
Nov 16, 2018

Spot welder pedal welder does not work, power indicator does not turn on: a. Check whether the power supply voltage is normal; Check whether the control system is normal. B. Check whether the pedal switch contacts, AC contacts and split shift switches are in good contact or burnt out. 2. The power indicator is on and the workpiece is not welded. a. Check whether the pedal stroke is in place and whether the pedal switch is in good contact. B. check whether the spring screw of the pressure bar is adjusted properly. 3. There should be no splash during welding: check whether the electrode head is oxidized seriously by a.. (B.) check whether the welding workpiece is seriously corroded and poor contact. C. check whether the switch is too high. (D.) check whether the electrode pressure is too small and whether the welding procedure is correct. 4, solder joints indentation serious and extrusion: check whether A. current is too large. (B.) check whether the welding workpiece is uneven or not. (C.) check whether the electrode pressure is too large, the shape of the electrode head and the cross section are suitable. 5. Insufficient strength of welded workpiece: a. Check whether the electrode pressure is too small and whether the electrode rod is tightened. (B.) check whether the welding energy is too small, and whether the welding workpiece is seriously corroded, so that the contact point of the solder joint is not good. (C.) check whether there is too much oxide between the electrode head and the electrode rod, between the electrode rod and the electrode arm. (D.) check whether the section of the electrode head is increased due to wear, resulting in reduced welding energy. E. spot welding machine checks whether the electrode and copper soft joint and joint surface are seriously oxidized. 6. Abnormal sound of AC contactor during welding: a. Check whether the voltage of AC contactor's input line is lower than 300 volts of self-released voltage during welding. B. check whether the power lead is too long or too long, resulting in too much voltage drop. C. check if the network voltage is too low to work properly. D. check whether there is a short circuit in the main transformer, resulting in too much current. 7. Overheating of welding machine: a. Spot welding machine checks whether the insulation resistance between the electrode base and the body is bad, resulting in local short circuit. B. Check whether the inlet pressure, water flow rate and water supply temperature are appropriate, and check whether the water system is blocked by dirt, resulting in overheating of the electrode arm, rod and head due to poor cooling. C. Check whether the contact surface of copper flexible coupler and electrode arm is oxidized seriously, resulting in the increase of contact resistance and serious fever. (D.) spot welder checks whether the cross section of the electrode head is too much due to wear, which makes the welder overload and heat. _e. Check whether the welding thickness and load sustainability exceed the standard, so that the influence of electrode pressure caused by overload of welding machine_electrode pressure has a significant influence on the total resistance R between the two electrodes. With the increase of electrode pressure, R decreases significantly, but the increase of welding current is not large, so it can not affect the heat production caused by the decrease of R. Reduce. Therefore, the strength of solder joints decreases with the increase of welding pressure. The solution is to increase the welding pressure while increasing the welding current.  _Because the contact area of the electrode determines the current density, the resistivity and thermal conductivity of the electrode material are related to the generation and loss of heat, therefore, the shape and material of the electrode have a significant impact on the formation of the nugget. With the deformation and wear of electrode ends and the increase of contact area, the strength of solder joints will be reduced. The influence of workpiece surface condition The oxide, dirt, oil and other impurities on workpiece surface increase the contact resistance. Too thick oxide layers will even make the current impossible. Local conduction leads to splashing and surface burning due to excessive current density. The existence of oxide layer will also affect the uneven heating of each solder joint and cause the fluctuation of welding quality. Therefore, thoroughly cleaning the surface of the workpiece is a necessary condition to ensure high-quality joints.