Laser cutting machine cutting quality of the security measures

Laser cutting machine for cutting the thermal deformation, although small, hard to avoid in the process of sheet metal in rolling, cooling uneven residual internal stress. Cutting, the metal is affected by local high temperature heat source along the direction of cutting swelling, and around the motherboard metal limit its expansion, the incision is metal to produce stress, when the stress exceeds the metal yield strength, will produce compression deformation, cooling contraction, then cooled to room temperature, due to the limit of the base metal, around along the direction of cutting will produce certain shortening deformation, within a certain residual tensile stress at the same time, this is why the cutting deformation. Laser cutting machine is the use of high speed, high temperature, high energy of plasma cutting machine and computer control phase combination of cutting sheet metal equipment. Its working process is programmed according to the prior automatic control, the identification process, choosing reasonable cutting process before the add work - The starting point of cutting speed, direction, order, etc, to cut pieces of processing quality plays a decisive role. As far as possible in order to reduce the cutting deformation, cutting before must ensure accuracy of sheet metal positioning, in general, cutting piece of arc starting point should be on the edge of the sheet metal, or in the midst of the slot cut mechanical parts for the ideal. When the distance is too big, can't afford to appear to break the arc arc or, make cutting, processing product waste or scrap. When the distance through the hours, between the nozzle and the work piece is easy to short circuit and burning nozzle, destroy the normal cutting process. The practice proved: the height of the nozzle distance artifacts in 6 - It is advisable to 8 mm, plasma cutting and water and compressed air plasma arc cutting nozzle distance artifacts height is slightly less than 6 - 8 mm。 Conditions permit, under the condition of using multipoint contact electromagnetic platform for proper leveling process, the sheet metal to eliminate uneven residual stress, improve the flatness of plate.