LaserStar iWeld 900 Series, Руководство по эксплуатации и техническому обслуживанию

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LaserStar
®
Workstation Operation & Maintenance Manual 900 Series Ver. 991.6 November 2019
12
wavelength, the same phase and the same polarization. The mirrors determine
the highly directional propagation characteristics of the laser light.
Part of the laser light passes through the semi-reflecting mirror and is the laser
light that performs the welding function. This process produces a very high
energy density light beam, many times higher than is possible with normal light at
the focal point of a lens. The energy -“
hot light
”- created at the focal point in a
relatively short time (0.5 to 20 ms) heats the work piece beyond its melting point
and thus enables a weld.
The area affected is in a limited range of only approximately 0.20 to 2 mm,
depending on the material. The laser light welds two metals together and thus
permits safe, durable, precise and non-warp joining of parts in the form of a spot
or seam. Because of the very short time of the laser pulse, the zone of heat
influence is limited to the immediate vicinity of the welded spot or seam.
The characteristics of a laser pulse, and thus the effect on the material, can be
influenced by the operating parameters VOLTAGE and PULSE LENGTH (width).
The voltage has influence on the amplitude; the pulse length influences the width
of the laser pulse.
In practice, the effect of both parameters while welding metals is as follows:

The voltage first influences the welding depth.

The pulse length predominantly influences the diameter of the welding point.

The focus influences the welding depth as well as the diameter of the welding
spot. When increasing the diameter, the welding depth is reduced at the
same time.
System Description
The LaserStar
®
Workstation™ and the LaserStar
®
Dual Component Welder are
movable, stand-alone, single-user operated products that can be used to weld
almost all metals and metal alloys quickly, reliably, and precisely.
The parts that are to be joined are manually arranged together under visual
control and welded together by means of one or more laser pulses.
The product is equipped with a Stereo Microscope with a crosshair to facilitate
the exact positioning of the parts. The crosshair marks the exact position on the
work piece where the laser pulse spot will occur.
Good welding results will only be obtained if the work piece is exactly positioned
with regard to the height (i.e. within the focusing area of the laser beam). The