By launching the manufacture of a fiber laser machine, BOSCHERT GmbH & Co. KG is setting a further milestone in the expansion of its delivery program. With experience gathered from more than 4,000 punch, punch-plasma and punch-laser-machines installed worldwide, the sheet-metal processing specialist has developed a solution in compact design which is distinguished by a whole range of practical advantages. The blank sheet is moved in the X-direction with travelling clamping jaws on the roller table, while the “flying” laser head travels in the Y-axis.
FiberLaser in compact design with many practical advantages
BOSCHERT currently supplies the new FiberLaser in two sizes: 3015 with a working range of 1,500 x 3,000 millimeters and 4020 with a working range of 2,000 x 4,000 millimeters. The machines can be optionally fitted with a one, two or four kilowatt fiber laser from the company‘s long-term plasma and laser technology partner Kjellberg. This high flexibility enables users to machine sheets made from structural steel (up to six, ten and fifteen millimeters), from stainless steel (up to four, six or eight millimeters) and from aluminum in various thicknesses (up to three, four or six millimeters) – reproducibly, precisely and to the exact shape required. In addition to this high application flexibility, the machine table is easily accessible for loading and unloading. It also has a flap for the immediate removal of small cut parts. These workpieces can be up to 350 millimeters wide and 1,500 millimeters long and are reliably discharged over the whole width of the table. For this purpose, the small parts flap lowers by 20 millimeters followed by a tilting movement through 40 degrees to transfer the parts to a conveyor located underneath. This eliminates the problematic “uprighting” of small, cut workpieces, increases process reliability, and enables these workpieces to be accessed quickly. In addition, slag and residual waste are transported via a second conveyor belt to a waste container located on the operator side.
Operational convenience for increased productivity and efficiency
Clamping of the blank and leftover metal sheets is solved equally cleverly. The sheet metal is fixed and clamped by up to four clamping jaws guided on recirculating roller bearings. The whole unit travels and positions via a rack-and-pinion drive in the X-axis. Any number of clamping jaws can be used depending on the nature of the blank and leftover metal sheets. The jaws are automatically positioned on the blank by an appropriate entry on the controller. The laser head is moved and positioned quickly and precisely in the Y-axis by means of a drive combination of ball screw spindle and linear guides. The height is also controlled by a capacitive distance regulator to ensure that the fiber laser head is at the optimum height and is correctly focused on the particular material to be processed. This produces outstanding cutting results with cut surfaces that usually do not need any further processing. The precise cutting system and the practical clamping concept also enable leftover metal sheets as small as 500 x 50 millimeters to be processed, thus resulting in a very high degree of material utilization. Under the machine hood is a special, three-stage safety system. This allows laser processing to be carried out on the materials and thicknesses mentioned without setting up special safety areas. The maintenance opening for the laser head is at the front of the machine, thus reducing downtime when changing the nozzle and increasing productive runtime.
Photo 1 shows the overall view of the new BOSCHERT FiberLaser machine in compact design with fixed table, sheet transport in the X-direction, and “flying” laser head in the Y-direction.
Photo 2 shows the extremely good accessibility for loading the machine table, even with leftover metal sheets; two (of a maximum of four) automatically adjustable clamping jaws, which travel with the clamped sheet in the X-direction, can be seen at the top left.
Photo 3 shows the small-parts chute; after lowering and tilting the clamp, the workpieces slide onto a conveyor belt and can be comfortably removed from the front.
Photo 4 shows the parts sorter; a parts sorting device with several containers can be installed below the discharge conveyor belt if required.