DYNALAS
Quasi-synchronous welding
Quasi-synchronous welding is a widely used technique in the field of laser plastic welding. Also known as high-speed laser welding, it is a technique that utilizes a short-pulse laser or a high-speed scanning laser beam to weld a workpiece. During the welding process, the laser beam is scanned at high speed along the contour of the area to be welded, causing the material on the surface of the workpiece to rapidly melt and form a weld seam. During the appeal process, all areas of the weld are heated and melted almost simultaneously (i.e. quasi-simultaneously).
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Quasi-synchronous welding has the following characteristics:
- Fast welding speed: quasi-synchronous welding adopts high-speed scanning laser beam, which can greatly improve the welding speed and thus increase the productivity.
- High welding precision: due to the focusing characteristics of the laser beam, quasi-synchronous welding can achieve high-precision welding to ensure the quality and strength of the weld.
- Small heat-affected zone: during the quasi-synchronous welding process, the energy of the laser beam is mainly concentrated in the weld area, with less thermal influence on the surrounding materials, which is conducive to maintaining the overall performance and dimensional stability of the workpiece.
- Good flexibility: quasi-synchronous welding is suitable for various shapes and sizes of workpieces, especially in the field of plastic welding has a wide range of application prospects.
In laser plastic welding, quasi-synchronous welding technology can be widely used in many fields. For example, in the automotive industry, quasi-synchronous welding is widely used to weld plastic parts such as bumpers, instrument panels, and door interior panels. In addition, quasi-synchronous welding is also suitable for precision welding needs in electronics, medical, aerospace and other fields.
Simultaneous welding
Simultaneous welding technology is a highly efficient laser welding process for plastics that utilizes one or more diode laser beams, which are shaped by optics and guided to contour lines along the weld layer. These laser beams generate heat at the weld seam, which causes the entire contour line to melt and bond together simultaneously (i.e. synchronously).
Simultaneous welding offers significant advantages where the aesthetics of the component are of paramount importance:
- High efficiency: The simultaneous welding technique melts the entire contour line at the same time, thus significantly increasing the welding efficiency.
- High precision: Due to the precise guidance and shaping of the laser beam, the simultaneous welding technology is able to achieve high precision welding.
- Low internal stress: Synchronous welding technology reduces the internal stress generated during the welding process through simultaneous welding of multiple beams, which is conducive to maintaining the stability and sealing of the welded parts.
Synchronous welding technology is mainly used in automotive lamps, medical industry and other fields, which have high requirements for welding efficiency and precision.
Contour welding
Contour welding means that the laser light source is moved and scanned along the welding contour, and welding along a single continuous laser beam is achieved by moving the table or laser head. This type of welding offers a high degree of flexibility in the welding of complex shaped structural components.
During contour welding, the focused laser beam scans the weld seam sequentially and melts locally. The relative motion is realized by means of a moving component (e.g. a table) or a laser, or a combination of both. Suspended from a moving platform or robot, the laser head focuses the spot and moves along the weld seam to complete the weld. Weld seam width limitations vary from a fraction of a millimeter to several millimeters, depending on the laser form and the agglomeration system.
Advantages of contour welding:
- High flexibility: Contour welding can be adapted to any two-dimensional ironing line and is ideal for frequent part changes.
- Complex shapes: The ability to weld thermoplastic structural parts with complex shapes.
- Controllable depth of fusion: Although contour welding can achieve a certain depth of fusion of the weld, but the depth of fusion is very small and relatively controllable, which requires that the deformation of the injection molded parts should not be too large.
- No overflow: the laser welding process will not be like vibration friction welding as a result of the welding tendons of a large number of collapsed resulting in welding area overflow is very much more, the weld line is more beautiful.
Contour welding is widely used in the automobile manufacturing industry, especially in the welding of automobile parts. For example, automotive taillights, instrument panels, fuel system plastic parts, EPB electronic parking system plastic parts, PMS tire pressure monitoring system, reversing radar, panoramic image, ECU electronic control and so on can be applied to contour welding technology. In addition, contour welding is used in other applications (medical technology, pharmaceuticals, etc.) where high precision and flexibility are required.
Radial welding
Laser radial welding is a process for welding radially symmetrical workpieces using a laser beam as a heat source. During the welding process, the laser beam is scanned along the radial direction of the workpiece, and the thermal effect of the laser causes the workpiece material to melt and form a connection. The working principle is based on the thermal effect of the laser and the radial symmetry of the workpiece. During the welding process, the laser beam is projected onto the surface of the workpiece through a focusing lens, creating a high-temperature hot spot. As the laser beam moves, the hot spot scans along the radial trajectory of the workpiece, causing the workpiece material to gradually melt and form a connection. At the same time, due to the radial symmetry of the workpiece, the laser beam acts uniformly over the entire weld area, resulting in a high quality weld.
Radial welding has a number of advantageous features:
- High precision: Laser radial welding has very high precision and repeatability, which ensures the quality and consistency of the welded joint.
- High efficiency: the heating speed of laser welding is fast, which can complete the welding process in a short period of time and improve the production efficiency.
- No pollution: laser welding process does not need to add any welding materials or auxiliary gases, so there is no pollution.
- Strong applicability: laser radial welding is suitable for welding of various materials, including metals, plastics and so on.
Laser radial welding has a wide range of applications in many fields, such as:
- Automotive electronics: used for welding of automotive parts, such as sensors, actuators, etc.
- Medical technology: for welding of medical devices, such as surgical instruments, implantable medical devices, etc.
- Household appliances: for the manufacture and assembly of household appliances, such as washing machines, refrigerators, etc.
- Aerospace: for the manufacture and maintenance of aerospace equipment, such as airplane parts, satellites, etc.