How to choose welding process parameters
27 Sep 2020
Spot welding machine e-book welding process parameters mainly include electron beam current, accelerating voltage, welding speed, focusing current and working distance. Generally speaking, penetration is directly proportional to acceleration voltage and beam current, and inversely proportional to beam spot diameter, working distance, and welding speed. The increase in acceleration voltage can increase the penetration depth. Under the condition of keeping other parameters unchanged, the cross-sectional aspect ratio of the weld is proportional to the acceleration voltage. Increasing the electron beam current will increase the penetration depth and penetration width. Increasing the welding speed will narrow the weld and reduce the penetration depth. The focus state of the electron beam has a great influence on the penetration depth and weld formation. A smaller focus can narrow the weld and increase the penetration depth. For different equipment, welding the same part, due to the differen...
What is the scope of application of cold welding repair machine for butt welding machine
21 Sep 2020
Scope of cold welding repair machine for butt welding machine: Cold welding repair machine is a professional precision repair welding equipment for casting pinholes, sand holes, pores, cracks, bumps, scratches, pits, surface wear of mechanical parts, mold wear and other small defects . It is widely used in mold industry, foundry industry, electrical appliance manufacturing industry, medical equipment, automobile, shipbuilding, boiler, construction, bridge construction and other industries. 2. Applicable materials for cold welding repair machine: The cold welding repair machine uses ordinary welding wire as the repair material. The materials are: gray iron, ductile iron, stainless steel, carbon steel, die steel, aluminum, aluminum alloy, copper, etc., as long as it is conductive metal Can be patched. Spot welding machine welding is flexible, simple, convenient, firm and reliable. Automatic welding machine welding is an electrical appliance that supplies power with certain characteristic...
The principle, characteristics and application scope of common welding methods
15 Sep 2020
Gas welding principle of spot welding machine Use the flame heat of combustible gas and oxygen to melt the weldment and welding wire for welding. Features: Flame temperature and nature can be adjusted, heat is not concentrated enough, heat affected zone is wider, and productivity is low. Scope of application: Used for welding thin plate structures or small parts. Weldable steel, cast iron, aluminum, copper and its alloys, cemented carbide, etc. Principle of electrode arc welding Use the arc heat between the electrode and the weldment to melt the electrode and the weldment for welding. Features: Exciting, flexible, adaptable, and can be welded in all positions. The beam spot is simple and durable, and the maintenance cost is low. The labor intensity is high, and the welding quality is affected by the skill level of the workers and is unstable. Scope of application: It is the most practical in single-piece, small batch production and maintenance. It can weld carbon steel, low-alloy steel...
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...