| 摘要 |
1,169,358. Machine tool details. W. O. M. JONES. 24 Oct., 1966 [29 Oct., 1965], No. 45958/65. Headings B3B and B3T. A method of pre-setting a cutting tool away from the machine tool in which it is to be used and whereby it occupies a predetermined position in the machine tool when located therein, comprises the steps of mounting the tool and/or tool holder in a jig, adjusting the tool and/or holder in relation to three mutually perpendicular reference plances defined by the jig, and which correspond to predetermined reference planes in the machine tool, removing the pre-set tool from the jig and mounting it on the machine tool where it occupies a known working position. The jig is in the form of a rotatably indexable table 12 mounted on tapered roller bearings and which carries a tool mounting member 56 having a female dovetail portion 60 for engagement with a male dovetail portion on a tool or tool holder. The member has an accurately machined face 62 and stop 64 in the dovetail 60, whereby the tool holder can be accurately positioned on the mounting member 56. The table 12 can be accurately located in a plurality of angular positions by a spring-biased bolt 28 the end of which engages in recesses 24 in the table. At intermediate positions between the recesses the table is locked in position by a band clamp 36 (Fig. 2, not shown). The tool mounting member 56 is adjustably positioned relative to the table acts by an eccentric bush 80 and with reference to the vertical and horizontal planes 50, 52, respectively defined by feet 48 and 51. The dimensions a and b may, therefore, be accurately determined and the adjustment of the tool-holder in relation to the stop 64 permits the tool to be accurately positioned in three mutually perpendicular planes. The pre-set tool is then removed from the jig and located in the machine tool on a mounting simulating that of the jig. |
