| 摘要 |
<p>Collet (15) for the chucks on automatic lathes with a collet carrier (40) comprising three rectangular longitudinal clefts open at the front into each of which a jaw (21-23) becomes fitted, bounded by common geometric surfaces, an internal cylindrical surface (24) corresponding to that of the bar (14) to be processed and an external truncated cone-shaped surface (32) corresponding to the internal surface (13) of the mouth of the chuck, so that on applying an axial force to said collet directed towards the inside of the chuck, matching of the truncated cone-shaped surfaces produces transversal and radial components with translation of the jaws and movement of the arms of the collet carrier towards the bar so clamping said bar obtaining maximum adherence and maximum axial precision. <IMAGE></p> |
