| 摘要 |
486,409. Locating work-tables in drilling-machines. LINDNER, H. (trading as LINDNER, H., [Firm of]). Dec. 20, 1937, No. 35264. Convention date, March 20. [Class 83 (iii)] The tiltable dividing table 1 of a drilling- machine is adjusted by the aid of a microscope 20 which observes a reference point on the drill spindle axis, such reference point being located on a pendulum 12 whose axis of oscillation intersects the axis A of the table at a predetermined distance from the table surface. A bracket 4 on the main table 6 carries a member 3 which is adjustable from a hand wheel 7 round an axis B, the setting being indicated by a scale 8. The table 1 is carried by the member 3 and is adjusted about its axis A, which is perpendicular to axis B, by means of worm gearing. A member 10c, secured coaxially with the table, is forked at its end 10a and fitted with centring pins 18, 19 for the pendulum 12 whose axis C intersects the axis A. The member 10c is set by means of reference marks 13, so that with the table 1 in a predetermined position, the axis C of the pendulum is parallel to the tilting axis B. The pendulum is fitted with a block 16 having cross-lines 17 which serve as an aiming mark. The axis C lies at a distance x from the table surface and the horizontal distance y from the aiming mark to the table centre for an inclination a of the table is given by y = x cos alpha. In a modification, Fig. 5, the aiming mark may lie in the axis C of the pendulum. The pendulum may be locked when not in use by a pin passing through holes 22, 12b, 23. |
