Control system for monitoring and controlling the processing of glass sheets in a glass bending and tempering system

摘要

A microprocessor-based control system for monitoring and controlling the processing of pairs of sheets of glass (6, 6') in a glass bending and tempering system. The glass sheets (6, 6') are conveyed by a horizontal roller conveyor (24) which is driven by a drive motor (36). The roller conveyor (24) conveys pairs of sheets of glass (6, 6') along the longitudinal length of an elongated heating chamber (18) to a bending station (22) where the glass sheets (6, 6') of each pair are simultaneously lifted by a bending apparatus (40). The glass sheets (6, 6') are controllably moved within the heating chamber (18) while on a plurality of rolls (26) adjacent the bending apparatus (40) independent of glass sheet conveyance on the other rolls of the conveyor. The control system (10) includes a photoelectric sensor pair (62) mounted on the conveyor for sensing the glass sheets (6, 6') as the glass sheets (6, 6') are conveyed by the conveyor (24). The photoelectric sensor pair (62) provides a glass sense signal to a control computer (88). An incremental encoder (56) coupled to the output shaft of the drive motor (36) provides a signal representation of the angular displacement of the output shaft to the control computer (88). The control computer (88) is programmed to respond to the glass sense signals and a transport signal of the encoder to provide control signals to coordinate the glass bending and tempering system including the bending apparatus and a roll operator.