초록 ▼

A point of operation safety device for hydraulic or pneumatic presses. The safety device is computer controlled and limits the movement of the punch by employing two sensing devices. These sensing devices include both position and contact sensors which are used as dual input variables to satisfy com

A point of operation safety device for hydraulic or pneumatic presses. The safety device is computer controlled and limits the movement of the punch by employing two sensing devices. These sensing devices include both position and contact sensors which are used as dual input variables to satisfy computer monitored operational condition limits which, if not met, shut down the operation of the machine to prevent accident or injury to the operator. Both sensing devices are located within the housing of the press and the ram assembly so that no additional structures are required which might obstruct the working area and thereby hinder the efficient use of the press. Because the components of this safety device are located within the body of the machinery and include complicated electronic control circuitry, it is impossible to defeat the safety mechanism by disconnecting any of the components.

대표청구항 ▼

A press for assembling fasteners into a workpiece having a frame with a base, comprising: (a) an anvil secured to said base, (b) a ram assembly including a punch attached to the frame above the anvil, (c) a main actuating cylinder connected to said ram assembly and punch for moving said punch along

A press for assembling fasteners into a workpiece having a frame with a base, comprising: (a) an anvil secured to said base, (b) a ram assembly including a punch attached to the frame above the anvil, (c) a main actuating cylinder connected to said ram assembly and punch for moving said punch along a path between a retracted position and a position of contact with said fastener or said workpiece located on said anvil, (d) sensing means for sensing when said punch contacts the workpiece, said contact sensing means connected to said ram assembly, (e) sensing means for continuously sensing the position of said punch relative to said anvil, said position sensing means connected to said ram assembly, and (f) a controller for limiting the operation of said press, said controller connected to and continuously signalled by both the contact sensing means and said punch position sensing means whereby the operation of the press may be halted.