Electrode materials commonly used in spot welders
07 Sep 2020
Chromium Zirconium Copper (CuCrZr) Chromium Zirconium Copper (CuCrZr) is the most commonly used resistance welding electrode material, which is determined by its own excellent chemical and physical properties and good cost performance. The chromium-zirconium-copper electrode achieves a good balance of the four performance indicators of the welding electrode: Excellent conductivity----------guarantee the minimum impedance of the welding circuit and obtain excellent welding quality High temperature mechanical properties----------Higher softening temperature ensures the performance and life of electrode materials in high temperature welding environment Abrasion resistance----------Electrode is not easy to wear, prolong life and reduce cost Higher hardness and strength----ensure that the electrode tip is not easily deformed and crushed under certain pressure, and the welding quality is guaranteed. Description: 1) The chemical composition analysis of the alloy is in accordance with the prov...
What is the welding principle of resistance spot welding machine
31 Aug 2020
What is the welding principle of resistance spot welding machine Spot welding is to melt metal through resistance heat under the action of electrode pressure, and crystallize under the action of electrode pressure to form a joint after the power is cut off. At the same time, a plastic ring is formed around the joint The spot welding cycle includes four phases that are pre-compressed, energized heating, forging and rest. 1. In the pre-compression stage, the weldment is in close contact to obtain stable contact resistance 2. During the electrification and heating stage, ensure that the contact surface of the two weldments begins to melt at the electrode holder to form a nugget 3. Forging stage When the nugget reaches the appropriate shape and size, the welding current is cut off, and the nugget is cooled and crystallized under the action of the electrode pressure Spot welding joint form: overlapping, folding Composed of two or more weldments of equal or unequal thickness Design principle...
What are the common electrode materials for spot welders
25 Aug 2020
What are the common electrode materials for spot welders? Class 1 copper and copper alloys with high conductivity and medium hardness. This type of material mainly achieves its hardness requirements through cold work deformation methods. It is suitable for making electrodes for welding aluminum and aluminum alloys, and also for spot welding of coated steel plates, but its performance is not as good as that of Type 2 alloys. Type 1 alloys are also commonly used to make non-stressed or low-stress conductive parts. Type 2 has higher conductivity and higher hardness than Type 1 alloys. This type of alloy can achieve its performance requirements through the combination of 236 cold work deformation and heat treatment. Compared with Class 1 alloys, it has higher mechanical properties, moderate electrical conductivity, and strong resistance to deformation under moderate pressure. Therefore, it is the most versatile electrode material and is widely used for spot welding. Carbon steel, low-alloy...
What is the difference between spot welding projection welding and T welding
17 Aug 2020
During spot welding, the welded parts are connected at individual points on the contact surface. When welding, lap the welded sheets and assemble them and press them between the two cylindrical copper electrodes. When a considerable current is passed, a large amount of heat is generated at the contact of the plates, which quickly reduces the metal in the hottest area in the center. Heat to a molten state, forming a lens-shaped liquid molten pool. After the current is disconnected and the metal cools, a welded joint is formed. According to the number of solder joints welded at the same time, it can be divided into single-point, double-point and multi-point spot welding. When the current is applied from both sides of the weldment, it is called double-side spot welding, and when the current is applied from one side of the weldment, it is called single-side spot welding. The diameter of the solder joint is generally close to the diameter of the electrode contact surface, which is approxima...
What are the types of spot welding electrodes
10 Aug 2020
Spot welding electrode determines welding quality The material used to make the electrode has sufficient electrical conductivity, thermal conductivity and high-temperature hardness, and the structure of the electrode must have sufficient strength and rigidity, as well as sufficient cooling conditions. In addition, the contact resistance between the electrode and the workpiece should be low enough to prevent the surface of the workpiece from melting or alloying between the electrode and the workpiece surface. Spot welding electrode is an important part to ensure the quality of spot welding. Its main functions: 1. Conduct current to the workpiece; 2. Transfer pressure to the workpiece; 3. Quickly dissipate the heat in the welding zone. Based on the above-mentioned functions of the electrode material used by the spot welder, it is required that the electrode material has sufficient electrical conductivity, thermal conductivity and high-temperature hardness, and the electrode structure mus...
What are the basic operating steps of the spot welding machine?
03 Aug 2020
Basic operation steps of spot welding machine The spot welding machine adopts the principle of double-sided double-point overcurrent welding. When working, the two electrodes press the workpiece to make the two layers of metal form a certain contact resistance under the pressure of the two electrodes, and the welding current flows from one electrode to the other electrode When the two contact resistance points form an instantaneous thermal fusion, and the welding current flows from the other electrode along the two workpieces to this electrode to form a loop without damaging the internal structure of the welded workpiece. [caption id="attachment_3259" align="alignnone" width="366"] hdpe welding machine[/caption] 1. Prepare the materials. 2. Open the gas valve and turn on the power of the precision spot welder (A opens the gas valve to confirm that the air pressure is between 0.2-0.3, and B turns on the power to check that the parameter settings are correct). 3. According to different w...