TWO STAGE WORKSTOCK LOCATOR FOR PUNCH PRESSES

摘要

Workstock to be operated upon by a punch press is advanced into blocking engagement with a first locating device which is slidably mounted in the die of the punch press and which locates the workstock in a first position. When the punch press is operated a second locating device, positioned in the ram of the punch press, engages the first locating device and forces it beneath the bottom surface of the advancing stock. When the first locating device is depressed beneath the bottom surface of the workstock, the workstock partially advances over the first locating device and into engagement with the second locating device, which accurately locates it in a second and final position to be operated upon by the punch press. The bottom surface of the workstock holds the first locating device out of blocking engagement with the workstock, and after the punching operation the workstock advances over the first locating device until the portion of the workstock which has just been blanked out by the punch is above the first locating device, at which time the first locating device rises to again block the advancing workstock and to initially locate it in the first position for the next punching operation.