Friction welding is a forging welding process. Under the action of pressure, the friction between the surfaces of two workpieces generates heat, the temperature of the material section rises, and the thermoplastic state is reached. With the plastic flow of the material, the solid welding method is realized through the molecular diffusion and recrystallization of the interface. The friction welding process is stable, the welding quality is good, and often only takes a few seconds, the speed is very fast, the process does not need flux, protective gas, does not produce welding smoke, manganese, nickel and other harmful occupational disease hazard factors, both environmental protection and does not damage human health, friction welding with its high quality, high efficiency, energy saving, pollution-free technical characteristics, In aviation, aerospace, nuclear energy, weapons, automobiles, electric power, Marine development, machinery manufacturing and other new technologies and traditional industrial sectors have been more and more widely used.

Friction welding process requirements In the welding process, in order to ensure the quality of welding, welding material temperature needs to be kept within the range of plastic rheology, can not be too high. In the previous friction welding work, the temperature control of the thermoplastic rheological state is controlled by the experience of technical workers, but the control of manual experience requires long-term work accumulation of workers, even so, it is prone to large temperature errors, in order to ensure the strength of the workpiece, the workpiece before entering the next process, It is necessary to carry out a long time annealing treatment in the annealing furnace (some enterprises require the quality of the process, requiring more than 20 hours of annealing of the workpiece), which not only delays the production schedule, reduces the production efficiency, but also increases the production cost.

At present, the more scientific way is to use infrared thermal camera to monitor the temperature of the welding point, infrared thermal camera can achieve non-contact temperature measurement, without contact with the welding parts, to avoid the risk of pollution or damage to the product that may be caused by traditional temperature measurement methods. The infrared thermal imager has high accuracy and can monitor the temperature too high or too low in real time and give early warning.

The use of infrared thermal imager temperature monitoring can help accurately control the welding temperature, so that the welding quality of the workpiece to achieve a better state, control the welding temperature can be completed after the welding, do not need to annealing process, directly carry out the next process. It not only improves the production efficiency, but also greatly reduces the production cost.