Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool.
Laser welding is more commonly used in some CNC milling and CNC turning parts, such as: medical equipment and products or parts in the medical industry, automotive parts or motorcycle parts, and aerospace equipment and parts. Because it can control the beam to weld in a very small area, laser welding is also the first choice for some relatively small precision parts that need to be welded, such as drone spare parts, some very small parts in medical equipment and the medical industry, etc.
The time when laser welding is often used in injection molding is when the mold is repaired. Injection molds are composed of many precision parts and components. Sometimes individual parts are partially damaged during the production process. It is the most affordable and fastest to use laser welding for local repair.
In sheet metal processing, in addition to argon arc welding, laser welding is used when there are requirements for precise welding positions or welding spot sizes. It is also a common welding method for sheet metal parts processing.
It is the main method for welding parts in
CNC Machining because its welding position is accurate, it has little effect on the size of precision parts, and it can also realize CNC automatic welding.
Material copper can also be welded
Argon arc welding, also known as TIG welding, is a high-quality welding method, commonly used for welding materials such as stainless steel and aluminum alloys. Argon arc welding can be carried out in a non-oxidizing environment, thereby reducing oxidation problems during welding, and is suitable for occasions with high welding quality requirements. In sheet metal processing, argon arc welding is used in a large part when two sheet metal parts need to be combined together. It is the main welding method in the sheet metal industry.
Friction welding refers to a method of welding by using the heat generated by the friction between the workpiece contact surfaces as a heat source to cause the workpiece to undergo plastic deformation under pressure.
Under pressure, the relative movement between the welding contact end surfaces generates friction heat and plastic deformation heat on the friction surface and its vicinity under constant or increasing pressure and torque, causing the temperature of the material and its vicinity to rise to a temperature range close to but generally below the melting point, reducing the deformation resistance of the material, increasing plasticity, and breaking the oxide film on the interface. Under the action of the forging pressure, the material undergoes plastic deformation and flow, and the welding is achieved through molecular diffusion and recrystallization at the interface.
Friction welding usually consists of the following four steps: (1) conversion of mechanical energy into thermal energy; (2) plastic deformation of the material; (3) forging pressure under thermoplasticity; and (4) intermolecular diffusion and recrystallization.
In
CNC Machining parts processing, two parts with relatively different shapes are often welded together by friction welding. Direct CNC processing wastes materials and increases processing difficulty and time. If the parts are processed in two parts and then welded together, materials and CNC processing time can be saved.
