The factors that affect the fatigue strength of the base metal (such as stress concentration, sectional size, surface state, loading condition, medium, etc.) also affect the fatigue strength of the welded structure. In addition, some characteristics of the welded structure itself, such as the change of the joint near the joint area, welding residual stress,…
1) Weld the bottom layer In order to achieve single-sided welding and double-sided forming, breakdown welding method should still be used for the bottom layer. During the breakdown welding of the inclined pipe, the molten pool should always be kept in a horizontal state. The diameter of the electrode is 3.2mm and the welding current…
Submerged arc welding is a welding method to bury the strong welding arc light. Naturally, the arc light can not be seen in the welding process, and most of the welding is automatic, and the working conditions are greatly improved. With the development of industrial production, more and higher requirements are put forward for welding…
Listen to a engaged in welding for more than 10 years of welding veteran master, beginners in welding can correct welding current will be very important for welding quality, because the welding current has a great impact on the weld shape. Welding current is too small, will cause penetration, no fusion and sticky electrode phenomenon;…
1. What is welding power source? A: In the welding machine, the equipment that supplies the electricity needed for welding and has the electrical characteristics suitable for welding is called the welding power source. 2. Why are there special requirements for arc welding power sources? What are the requirements? Answer: In order to ensure the…
Handheld laser welding machine which is a new type of welding method, mainly for thin wall material, precision parts welding, which can realize welding, butt welding, welding stack, seal welding, such as depth ratio is high, the weld width is small, small heat affected zone, small deformation, welding speed, welding seam smooth, beautiful, without treatment…
We are often amazed at the beauty of the weld, but have to accept a reality, such a beautiful weld would appear unqualified detection situation? This is a headache for engineers. Why are there cracks in the welds? How do they come about? How to avoid it? What is welding crack? Welding crack is one…
Aluminum alloy welding process Gas welding of aluminum alloy Oxygen-acetylene welding thermal efficiency is low, the welding heat input is not concentrated, welding aluminum and aluminum alloy need to use flux, after welding and need to remove residue, joint quality and performance is not high. Because the gas welding equipment is simple, does not need…
Spot welding principle It refers to the welding method of forming a solder joint between the contact surfaces of two lap workpieces by using a columnar electrode. Spot welding, the first pressure to make the workpiece close contact, then connect the current, the workpiece contact melting under the action of resistance heat, after cooling the…
Laser welding process Especially in the field of automobile industry has been paid attention to and widely used, in which the automobile cover is one of the five categories of laser welding. It can reduce body weight, improve body assembly precision, increase body stiffness, and reduce stamping and assembly cost in the process of automobile…
