Electrofusion welding machine for hot melt butt welding
The connection interface of the electric fusion welding […]
The connection interface of the electric fusion welding machine for hot-melt butting is flat. The method is to heat the two identical connection interfaces to the viscous flow state with the hot plate, remove the hot plate, and then apply a certain pressure to the connection interface, and at this pressure The state is cooled and solidified to form a firm connection.
Before heating the pair, the two ports of the pipe to be welded need to be milled, so that the welding surface is more flat, and the plastic oxide layer on the surface of the port is removed to make the same molecule melt more thoroughly. The main processes of the entire welding process are adjustment, heating, switching, joint pressurization and cooling.
The materials in the viscous flow state at the interface during the docking have flow and diffusion, and the flow is too large to be conducive to diffusion and entanglement. Therefore, the flow should be limited to a certain range, and "post-fusion welding" can be realized in a limited flow. Therefore, the key to the docking process is to adjust the temperature, time and pressure parameters in the docking process. The properties, stress conditions, geometry and environmental conditions of the joint interface materials should be considered together to achieve reliable welding.
According to the general rules and the characteristics of the materials used, the welding quality is evaluated. After the system standard is reached, the technical specifications of each type of specification are determined, and the production and on-site installation of the welded pipe fittings are carried out according to the specified process parameters and steps.
In the electric welding machine, whether it is manual or hydraulic, heating plates and milling cutters are necessary. The difference is that the former relies on manual control, while the latter is powered by hydraulic system to achieve semi-automatic control, especially for pipes with large caliber. It takes a lot of pressure to mill, heat and cool, and it is generally difficult to do it.