| 摘要 |
1,163,776. Milling machines; gauging. HAYES ENGS. (LEEDS) Ltd. 17 Oct., 1967 [23 Nov., 1966], No. 52448/66. Headings B3B and B3K. [Also in Division G3] The setting of a datum between a tool and a workpiece holder of a machine tool is effected by incorporating the tool or workpiece holder and a height gauge element as engageable contacts in a sensing circuit of an electrical control system for axial relative movement between tool and work-holder. As shown, a milling cutter 1 is mounted in a quill of a machine head 3 and is manually adjusted to protrude by an amount sufficient to ensure the required cutting length. The quill is operated by a rack and pinion 4, 5 driven through a worm and wheel 6, 7 from an hydraulic motor 8 controlled by a changeover valve 9. The valve is actuated by solenoids 11, 12 connected to a control box 14. The movement of the tool is initiated by a push 16 and terminated when the tool makes an electrical contact with a height gauging element 17 mounted on a worktable T. A plurality of elements can be employed which are arranged to swing over the work-table. It is stated that the work-table may be movable instead of the tool. |
