H - Electricity – 01 – H
Patent
H - Electricity
01
H
340/136, 341/64
H01H 35/00 (2006.01) B24B 49/00 (2006.01) B24B 51/00 (2006.01)
Patent
CA 1105111
A B S T R A C T Mounted adjacent and in alignment with workpiece sup- porting portion of a workpiece-shape-altering machine, such as the lower die of a stamping press, is a laser beam source, the outgoing beam from which passes through a beam splitter which divides the entering beam. One of the two emergent beams from the beam-splitter is a workpiece position-inspecting beam which passes in a grazing direction across one portion of the top of a workpiece resting upon the lower die for subsequent stamping by the upper die of the press. This beam continues onward to a mirror which reflects it in a grazing direction back across another portion of the top of the workpiece to a workpiece po- sition detector. Theeother emergent beam from the beam split- ter is a workpiece presence-inspecting beam which is obstruct- ed by the workpiece, if present on the lower die, so that it does not reach the workpiece presence detector therebeyond. If, however, the workpiece has not been delivered to the lower die, or if delivered and worked upon, has adhered to and has been carried upward with the upper die, the workpiece presence detector immediately transmits the absence of the workpiece from the lower die to the electric control system of the press, which prevents the operation of the press until a workpiece, is properly supplied to and positioned upon the lower die. On the other hand, even if the workpiece is in position on the lower die but is improperly positioned, such as being tilted, so that it obstructs the workpiece position-inspecting beam with the result that the beam does not reach the workpiece detector, the improper position of the workpiece is transmit- ted to the electric press control system, which thereupon prevents actuation of the press until the workpiece has been properly positioned upon the lower die by the operator.
307166
Auto-Place Inc.
Borden Ladner Gervais Llp
LandOfFree
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