Pdf Laser Beam Welding

The laser beams have enough energy and when it strikes the metal pieces produce heat that melts the material from the two metal pieces and fills the cavity.

Pdf laser beam welding.

Figure 2 is a simplified schematic representation of the three stages to laser generation. Laser beam welding is a fusion welding process in which two metal pieces are joined together by the use of laser. Continuous wave gas lasers using carbon dioxide gas with power up to 20 kw are used for laser beam welding. The laser beams are focused to the cavity between the two metal pieces to be joined.

C7 2m 2010 recommended practices for laser beam welding cutting and allied processes formats. Laser may be recirculated in some cases to reduce cost. 116 00 this document presents recommended practices for laser beam welding cutting and allied processes. Humans can only see visible or the white light wavelengths.

Laser is an acronym for light amplification by stimulated emission of radiation. The energy of a narrow laser beam is highly concentrated at 10 8 10 10 w cm 2 so a weak weld pool is formed very rapidly for about 10 6 sec. Laser beam welding lbw is a welding technique used to join pieces of metal or thermoplastics through the use of a laser the beam provides a concentrated heat source allowing for narrow deep welds and high welding rates. Laser welding a laser is a beam of concentrated light energy generated at a specific wavelength.

Printed hard copy download pdf. It is intended to cover common applications of the process. Laser beam welding lbw is a fusion joining process that produces coalescence of materials with the heat obtained from a concentrated beam of coherent monochromatic light impinging on the joint to be welded. The process is frequently used in high volume applications using automation as in the automotive industry it is based on keyhole or penetration mode welding.

It may be done by conduction or by penetration. In nature light exists across a spectrum of wavelengths ranging from very short x rays and gamma rays to very long radio waves. Welding is done with high power lasers with longer pulses so that metal can be heated to its melting point without vaporization. Laser welding is a process used to join together metals or thermoplastics using a laser beam to form a weld.

Download laser beam welding seminar reports ppt pdf laser beam welding seminar topics abstracts full documentation source code. The laser beam heats and melts the edges of the workpiece forming a joint.