| 摘要 |
<p>1329288 Making nuts K SHINJO 17 Dec 1970 [4 June 1970] 60039/70 Headings B3A B3H and B3Q [Also in Division F2] A locking nut is made by deforming the corners of a four-sided nut between a punch and a die to form tabs which are then bent over an insert of resilient material. The tabs 12, Fig. 4, are extruded between frusto-conical surfaces 6, 7 on the die and punch 3, 4. In another die, Fig. 7, having forming surfaces 18, 19, 20, the tabs are bent over a nylon insert 13.</p> |
