Welding is defined as the manufacturing process and technology of joining metals or other thermoplastic materials (such as plastics) by heating, high temperature, or high pressure. In fact, in our impression, the object of welding is generally metal. How to weld wood that is afraid of high temperatures?
Today, laser cutting manufacturers will take you to find out.
1. What is friction welding
Friction welding is a method that uses the end faces of the workpiece to move and rub each other to make the end faces reach the thermoplastic state, and then quickly upset to complete the welding. It is a hot spot in welding research in recent years.
Friction welding technology does not require the introduction of external heat sources, which can greatly simplify the process flow, reduce auxiliary processing equipment, and effectively reduce production costs and environmental pollution. At the same time, friction copper machining technology has the advantages of stable welding joint quality, high welding efficiency, easy automation, and low energy consumption.
2. How to carry out friction welding of wood
Friction welding of wood is a kind of linear reciprocating or rotating friction between two wood components. The heat generated by friction can melt the high-molecular polymer in the wood, and the fibers in the wood are entangled with each other during the movement of the parts. When the movement stops, the entangled wood fibers are wrapped by the cooling melt layer to form a welded joint to connect the wood components together.
3. Four sections of wood brass machining
Friction welding of wood can be divided into four stages
①In the initial stage, the two closely contacting wooden components begin to move back and forth, and the surface of the components generates heat through friction;
②Transition stage: As the friction progresses, the temperature of the friction interface increases, and the material in the friction area begins to soften and melt;
③In the stable stage, the frictional heat of the welding interface tends to be stable, and the melt layer begins to flow plastically. Under pressure, the high-temperature plastic-wood polymer at the friction interface is continuously squeezed to form a flash;
④Cooling stage: After the friction stops, the polymer material cools and solidifies and connects into a whole.
4. What are the factors that affect wood welding?
First of all, the properties of wood, such as wood type, moisture content, density, ring width and other factors will have a certain impact on the friction welding of wood. Secondly, different welding methods have different influencing factors due to their respective processing characteristics. Friction cnc turning china can be divided into linear vibration friction welding and high-speed rotary friction welding. Linear vibration friction welding is affected by the welding process parameters (welding pressure frequency, welding time, welding amplitude); high-speed rotary friction welding is affected by the rotation speed, insertion speed and circle of the round bar tenon. The diameter of the round bar tenon and the diameter of the pre-drilled hole The difference affects the welding parameters.