Application of welding head in automobile plastic parts

Application of welding head in automobile plastic parts

Facing the world's largest plastic demand market, the technology of welding plastic materials through laser welding heads has broad market prospects. Plastic laser welding head technology is widely used in medical devices, electronic components, auto parts, textiles and packaging industries. For example; hues of plastic parts can be found everywhere in modern cars, be it exterior (e.g. bumpers, fenders, wheel covers, air deflectors, etc.), interior (e.g. dashboards, door inner panels, accessories), instrumentation panels, glove box covers, seats, rear fenders, etc.), or functional and structural components (such as fuel tanks, radiator boxes, air cleaner covers, fan blades, etc.).

The welding technology of plastic laser welding head belongs to non-contact welding technology. Compared with other welding methods, it has the advantages of non-contact, air tightness, no water leakage, fast welding speed, high precision, high welding strength, no flash, no residue, no vibration, minimal thermal stress, easy control, and good flexibility. The connection of automotive plastics is a key link in its wide application. The welding technology level of plastic welding joints is one of the indicators to measure the technical level of automobile production and the development level of new materials. Today, laser welding head welding is more economical, simple, fast, reliable, suitable for mass production, and is being used more and more widely in the automotive industry.

1. Laser welding head welding of plastic parts in automobile fuel system

The introduction of six national standards in the automotive industry has spawned a large number of fuel system injection molding parts that require laser welding head welding, such as welding of the most typical oil and gas separators, welding of various fuel pipes and plastic joints, welding of mufflers, Welding of combined valve bodies, welding of valve bodies such as check valves, etc. Two main materials are used for plastic laser welding head welded components of various fuel systems: nylon, fiberglass, and POM. These two types of plastic materials have been proven for a long time in various laser plastic welding applications in the automotive industry. As a laser welding material, there is no problem.

2. Laser welding head welding of EPB electronic parking system plastic parts

The laser welding head welding of the plastic parts of the EPB electronic parking system mainly involves the laser welding head welding of the EPB electronic parking controller shell and the plastic shell of the EPB electronic parking MGU component. In the structural design, the EPB controller and the MGU component shell adopt the quasi-synchronous welding design structure. The bottom shell is designed with welded ribs. The laser head is quickly scanned along the welding rib and the welding is completed after melting the entire welding rib. The advantage of the quasi-synchronous laser head plastic welding process is that, on the one hand, the deformation of the plastic part can be compensated by the downward collapse of the welding rib; on the other hand, it can be used as one of the quality monitoring criteria by monitoring the collapse of the welding rib.

3. Automobile dashboard plastic laser welding head welding

The welding method of the traditional instrument panel using the plastic welding head is welding vibration friction. The dashboard surface was scratched by high-frequency vibration during the welding process. Therefore, the jig for vibration friction welding needs to be coated with a soft material to prevent the surface of the dashboard from being scratched during the welding process. Another minor issue with vibration friction welding is the generation of slag and poor cleanliness during the welding process. For dashboard welding, the biggest problem with vibration friction welding is that a lot of glue will spill after welding, and the welding line or welding area is not very beautiful. The traditional method is to hide these weld lines. However, as the interior designs of cars have become more compact, there has been less and less room for plastic welding designs. In many cases, the welds of the dashboard are completely exposed to the visual field. Therefore, finding a new and beautiful plastic laser welding head welding process has become a real need.

Plastic laser welding head welding for car lights

According to aerodynamics, different shapes of car lamps are designed. In the past, traditional plastic welding techniques, including laser head welding, could only weld two-dimensional parts. Today, 3D plastic laser welding head welding technology can break through the 2D barrier. It can seamlessly connect three-dimensional objects, which not only improves product quality, but also greatly reduces production costs.