GSI Group - Laser Division
JK300HP/JK300P/JK125P
Pre-installation and User Manual
Issue 2.0
Page 162 of 172
Part No: 1EA300E01
Variations in focus position are tolerated more efficiently using a Modulated Beam. When the
weld surface varies in distance from the Focus Lens, the use of high Peak Power overcomes
the loss of weld penetration due to the lower intensity in the focus spot.
10.5 Jigs and Fixtures
Control of the material position relative to the Laser beam is achieved using Jigs and
Fixtures. Good position control is essential if good quality, consistent results are to be
achieved.
If flat sheet materials are to be processed, the simplest form of control is by clamping the
material in a fixed plane relative to the Laser beam. Figure 36 shows two simple
arrangements, A - clamping from below and B - clamping from above.
Figure 36 – Position Control Methods
Clamping from above allows high pressures to be exerted on the workpiece and enables
rapid changing of components.
Clamping from below offers the advantage of always presenting the surface of the workpiece
consistently in position with respect to the Laser beam. This method is recommended when
processing sheet materials, which vary in thickness.
Experience has shown that the clamping method used should ensure that the parts to be
welded are held with the joint ±0.2mm relative to the Laser beam focus position.
10.6 Shielding Gas
During welding operations, it is normally necessary to provide an inert gas shield around the
weld to prevent oxidation.
2
1
2
1
3
3
4
4
5
5
A
B
Petitioners Canadian Solar Inc. and Canadian Solar (USA) Inc.
Ex. 1025, p. 162
