GB930165A - - Google Patents

Abstract

930,165. Riveting. BAXTERS (BOLTS, SCREWS & RIVETS) Ltd. April 26, 1962 [June 17, 1961], No. 21956/61. Class 83 (4). A riveting machine for setting clinch nuts or bushes and the like includes a combined workholder and punch tool arranged to be reciprocated so as to co-operate with a stationary anvil, said combined work-holder and punch tool comprising a shank part having an end face constituting a punch surface, and a resilient sleeve fitted to said shank and projecting beyond said end face so as to form a cup adapted to receive the body portion of a clinch nut or bush with the spigot part projecting. A longitudinally-split spring steel sleeve 4 is fitted to the circular shank 3 of a punch tool which has a flat lower end face. The sleeve grips the shank and may be additionally secured by a pin 6. The internal diameter of the sleeve is slightly less than the diameter of the part 1 to be gripped, and the projection key and the lower end of the punch is less than the length of the cylindrical body of the part to be set. For automatic operation the machine is equipped with feed means including a shoot 8 and a supporting device comprising a pair of arms 10, 10 attached to a block 11 fixed on one end of a spindle 12 mounted in a plate 13 fixed to the frame of the machine. The other end of the spindle 12 is attached to the centre of a clock spring 14, which is anchored at 15. Fixed to an enlarged part 3<SP>1</SP> of the shank 3 is a member 16 which co-operates with a cam plate 17 fixed to the member 11. A part 1 is fed from the shoot 8 on to the arms 10 beneath the sleeve 4. As the ram descends the cup 7 grips the part and the member 16 engages the camplate 17 and moves the arms 10 aside. The spigot part of the nut or bush is inserted into an aperture in the material 9 and it is clinched by an anvil 2.