| 摘要 |
1,168,746. Workholders; grinding. CARBORUNDUM CO. 24 June, 1968 [26 June, 1967], No. 29917/68. Headings B3B and B3D. A workholder 50, Figs. 3 and 5 comprises a housing 54, a rotatable shaft 70 projecting from the housing and having a pair of work clamping fingers 74, 76 mounted thereon adjacent one end, the shaft 70 being rotatable by first means, e.g. handle 78 to bring the fingers 74, 76 into engagement with a workpiece and second means being provided to apply clamping pressure. The second means include a drum 80 mounted on the shaft 70, a steel band 104 encircling the drum and secured at one end to a pivotally mounted block 86; an eccentric device 130 . . . 136 is arranged to be operated manually by means of handle 140 to pivot the block 86 thereby tightening the band 104 about the drum and simultaneously turning the drum to apply damping pressure. In a cut-off machine, Fig. 2, having a cut-off wheel 28 mounted at one end of a pivotally arranged arm 22 the wheel being driven from a motor 36 mounted on the arm 22, the workholder 50 is mounted on the underside of the worktable 12 the fingers 74-76 being arranged to project upwardly through slots in the table to clamp a workpiece W against an angle shaped abutment member 150 secured to the table. To cut through the workpiece W the arm 22, with the cut off wheel 28, is pivoted downwardly by means of handle 24, the wheel 28 passing between the clamping fingers 74, 76 and through suitable slots in the table 12 and abutment member 150. |
