| 摘要 |
1,112,867. Making welding studs; forging; welding by pressure. CROMPTON PARKINSON Ltd. 14 Sept., 1965 [17 Sept., 1964], No. 39206/65. Headings B3A, B3H and B3R. In a method of producing a stud for use in electric arc stud welding a recess is formed in the end of the stud by cold forming, the wall of the recess is deformed to form projections and a slug of flux is forced into the recess and caused to flow around the projections which then hold it in place. In a five station machine a piece of stock 18 is cut from a bar 10 by a cutter 20 at the first station and transferred to a holder 22 of the second station. At this station a head 48 is partly formed by a heading recess 40 in a heading die 38 whilst at the other end a pin 52, Fig. 3, on the end of an ejector 28 forms a recess 54. The head 78 is completed and the recess is enlarged at the third station. At the fourth station the stud is held against movement by an insert 100 whilst a chisel-like peening blade 104, Fig. 5, forms projections 108 at the end of the enlarged recess 106 in the end of the stud. At the fifth station, flux slugs 134 from a hopper or supply line 138 are forced into the recess 106 by a driving member 130. The stud is moved to the right by a ram assembly 148 into a small recess 114 in a die member 112. Further movement of the ram carries the die member against a spring 128 so that the fixed drive member 130 projects past a slug feed passage 132 to allow a slug into the recess 106 where it is deformed to flow around the projections 108. |
