Pdf Laser Beam Welding

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.

Pdf laser beam welding.

In nature light exists across a spectrum of wavelengths ranging from very short x rays and gamma rays to very long radio waves. It may be done by conduction or by penetration. Figure 2 is a simplified schematic representation of the three stages to laser generation.

The laser beams are focused to the cavity between the two metal pieces to be joined. Laser beam welding lbw is a welding process in which heat is generated by a high energy laser beam targeted on the workpiece. 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. 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. It is intended to cover common applications of the process. 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. Laser welding is a process used to join together metals or thermoplastics using a laser beam to form a weld.

C7 2m 2010 recommended practices for laser beam welding cutting and allied processes formats. Printed hard copy download pdf. 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. Continuous wave gas lasers using carbon dioxide gas with power up to 20 kw are used for laser beam welding.

The laser beam heats and melts the edges of the workpiece forming a joint. 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. Download laser beam welding seminar reports ppt pdf laser beam welding seminar topics abstracts full documentation source code. Laser is an acronym for light amplification by stimulated emission of radiation.

Humans can only see visible or the white light wavelengths. Being such a concentrated heat source in thin materials laser welding can be carried out at high welding speeds of metres per minute and in thicker materials can produce narrow deep welds between square edged parts.