laser welding have developed a ocean in it that contains number of methods/ ways to join he part together few of them are discussed in this document

1. Techniques used for Laser Welding
1- Contour Welding
In contour welding, a laser is guided along a predetermined
welding pattern. The material only melts on the path that the laser is
directed. Relative motion is achieved by moving the laser source, the
part or a combination of both.
2-Simultaneous Welding
In this technique, a laser will heat the entire weld area
simultaneously. Almost any beam geometry can be generated by
means of a special, state-of-the-art beam shaping elements. Parts,
up to an area that equals 2.000" diameter, can be welded using
this method.
3-Radial Welding
A unique welding method for bonding cylindrical components
where by a mirror deflects the laser beam such that it impinges radially
on the outside symmetrical surface of the component. The designed tight
fit between the parts that are to be joined ensures the clamping pressure
required fo r laser welding to be successful is incorporated.
3-Patented Hybrid Welding
Hybrid welding combines laser energy with infrared thermal radiation from conventional halogen
lamps. This increases the welding speed weather the weld path is in two or three - dimensions. The main
application for this technology is structural components in the automotive sector, such as: automotive
lighting and motor assemblies.
4-Patented Laser Hot Riveting
Laser hot riveting combines riveting technology with laser plastic welding. A positively locked
joint between two components is created using this method. The riveting tool does not come into contact
with the plasticized material. This provides a clean process. Laser hot riveting can be used to join
components which cannot be welded directly – for instance, fixing PCBs to plastic housings.
5-Mask Welding
With this patented technique, a mask is inserted between the
laser source and parts to be welded. A curtain laser beam is moved
across the entire joining area of the parts. The laser beam welds only
where the components are not covered by the mask. The mask
welding method makes it possible to weld extremely delicate weld
areas.
Typical Applications: medical micro-fluidic devices and electronic
components.

2. 6-Globe Welding
Globe welding works along the lines of Contour welding. A
laser beam is focused at a point on the joining plane via an air bearing,
frictionless, free rotating glass sphere. The glass sphere not only
focuses the laser beam; it also serves as the mechanical clamping tool.
While the sphere rolls on the components, it applies continuous
pressure at a point on the joining plane. The glass sphere replaces the
mechanical clamping device and expands the scope of laser welding
for both continuous and three-dimensional applications.
Typical Applications: automotive taillights, apparel