Hole piercing apparatus

Abstract

Abstract A PUNCHING APPARATUS IS SET FORTH HEREIN FOR THE SIMULTANEOUS PIERCING OF HOLES THROUGH THE WEBS OF STRUCTURAL BEAM SHAPES NEAR EACH END COMPRISING A FIXED AND A MOBILE END LOCATED DUAL PUNCHING UNIT. THE MOBILE UNIT IS WHEEL MOUNTED ON A TRACK ON A COMMON LONGITUDINAL FABRICATING LINE FOR VARIABLE CENTRE TO CENTRE SPACING OF THE OPERATING CENTRES OF THE PUNCHING UNITS FOR THE PUNCHING-FABRICATION OF BEAM MEMBERS OF VARIABLE EFFECTIVE LENGTHS. THE SAID MOBILE UNIT IS PRE-LOCATED BY A POWERED THREADED RELOCATING SHAFT TO PRODUCE IN CO-OPERATION WITH THE FIXED UNIT GROUPS OF HOLES AS REQUIRED AND INDICATED BY LENGTH MEASURING DIALS AT EACH END OF THE BEAM MEMBER. DUAL TRANSVERSE CONVEYOR BELTS MOVE THE SHAPE TRANSVERSELY UNDER THE OPERATING HEADS OF THE PUNCHES, DUAL LENGTH-CENTERING RAMS LONGITUDINALLY LOCATE THE SHAPE UNDER THE PUNCHING HEADS, DIES ON AN ELEVATING ANVIL RAISE THE SHAPE OFF THE CONVEYORS AND SELECTED UPPER LOCATED PUNCHES PIERCE THE REQUIRED HOLES. ON RETRACTION OF THE PUNCHES AND DIES THE MEMBER IS RETURNED TO THE CONVEYORS FOR FORWARD PROGRESSION TO DISCHARGE AS A COMPLETED MEMBER.

Inventors

• 👤 John R Mcconnell

Bibliographic Details