Patent GB-740741-A (GB)
Title: Rivet inserting machine
IPC: B21J15/46
Filed: 1950-09-13
Abstract: 740,741. Riveting. KELSEY-HAYES WHEEL CO. Sept. 13, 1950 [April 24, 1950,] No. 22536/50. Class 83 (4). In a machine for inserting rivets into an assembled rim and wheel body &c. comprising means for feeding rivets successively to the inserting member and for axially moving the work into and out of position, the axial movement of the work into a predetermined work positon permits the actuation of the controlling means for the rivet-inserting member. A wheel rim and spider assembly are fed to a rivet-inserting machine along rails 2, Fig. 1, by an arm 7 on a reciprocating slide 6 moving on a guide 5 on the bed plate 9 of the machine. A table 13 for lifting the wheel assembly off the rails 2 and lifting it into position for the insertion of rivets is vertically reciprocated by a double-acting air cylinder 11 and piston-rod 12 and angularly located by guide rods 14 sliding in the bed plate 9. A C-shaped ring 15 on the tabel supports and locates the rim and pins 18, 19 engaging the central hole in the wheel spider and one of the bolting-on holes respectively, axially and angularly locate the spider. Blocks 20, Fig. 4, supported by posts 23 locate the assembly in the vertical position and an electric switch 114 also mounted above the assembly and which is normally open is arranged to be closed by engagement of the assembly with a resilient finger 115 as the assembly comes into position. The switch is incorporated in a manual or automatic electrical control circuit as described in Specification 673,179 for the rivet-inserting devices and prevents actuation of these devices unless there is a wheel and spider assembly in position. The rivet-inserting devices are arranged radially in four groups of three on the machine table 24 around an aperture in the table through which the wheel rim assembly is raised into position for the insertion of the rivets. Each device comprises a reciprocating slide 56 for holding individual rivets and a push rod 55 for inserting the rivets moving radially relative to the wheel rim in a guideway 58. The inner end 68 of each slide 56 is forked and carries a rivet holding arm 70, Fig. 2, yieldingly retained in position against a stop 75 by a spring 74 and having a rivet-receiving groove 71 into which the rivets are dropped from shoots 52. A spring 76 on the forked end 68 further serves to guide and hold the rivet when ejected. The push rod 55 moves longitudinally within the slide 56 and is reciprocated by a double-acting compressed air cylinder 57. A nut 107 on the push rod engages a compression spring 67 resting against the outer end of the slide 56 so that when the push rod moves radially inward and engages the rivet head the slide 56 is moved inwards to guide the rivet to one of the holes in the rim of the wheel until the inner end of the arm 70 engages the wheel rim, the push rod 55 then continuing its movement to insert the rivet. On the return stroke of the push rod a collar 64 thereon engages a spring 66 within the slide 56 and returns it to the outer position ready for receiving the next rivet from the shoot 52. The rivets are held in the shoot 52 and released successively by rivet-separating devices comprising a separating rod 83 parallel to the push rod 55 and reciprocated in a housing 84 by an arm 85 projecting from the push rod 55 which engages a compression spring 109 resting against a shoulder on the rod 83 on the inward stroke. On the outward stroke the arm 85 engages a nut 111 on the end of the rod 85 which is thereby positively returned until a projecting leaf spring 112 engages a fixed bracket 82. The housing 84 has top and bottom rivet inlet and outlet openings 92, 93 at its inner end and in continuation with the slots in the shoot 52. The inner end 86, Fig. 12, of the separating rod 83 has a rivet-receiving hollow portion 94 with a wide inlet opening 95 on its upper face for receiving the lowermost rivet from the shoot 52 when the rod is in the retracted position and a shaped outlet opening 96, Fig. 13, on its lower face through which the rivet drops when the rod 83 is in the forward position. Plates 101, 102 mounted on the housing 84 and projecting into the rivet-receiving portion 94 prevent backward and forward movement of the rivet with the reciprocations of the rod and tapering narrow openings 105, 106 joining the opening 95 in the rod 83 serves to raise and retain the column of rivets as the rod 83 moves forward. The rivets are supplied to the shoots 52 from a hopper 31 described in Specification 740,760, [Group XXX].