| 摘要 |
915,469. Tool-holders. SAGINAW MACHINE & TOOL CO. Sept. 13, 1960 [Jan. 11, 1960], No. 31567/60. Class 83 (3). A device for adjustably mounting a lathe or like tool-holder 64 comprises a base 1, an arm 2 pivotable about a spring-loaded pivot 4, a leveroperated screw 22 for swinging arm 2, and a dial gauge 32 for indicating the amount of adjustment. A spring-urged stud 16, having a clearance in a bore 13 in arm 2, to allow swinging of the latter carries a nut 18 for clamping the arm in its adjusted position, and screw 22 axially fixed by columns 29, 30, has a toothed wheel secured thereto which cooperates with a pawl on a lever 26, so that on rotation of the latter, screw 22 produces swing- ing of arm 2. Dial gauge 32 fixed to face 40 of arm 2 engages a projection 55 on a plate 51 Fig. 4, journalled to a pin 52 in arm 2, and a pin 56 in base 1 engages a slot 58 in plate 51. Arm 2 has two passages 44, 45, and the anvil 37a of the dial gauge passes through passage 44 when a left-hand tool is used and through passage 45 when a right-hand tool is used, the plate 51 in this case being reversed. The toolholder 64 slides in a channel 61 on arm 2, is adjusted to maintain a distance " x " by screws 73, and is secured by' screws 68. Distance " x " is maintained at a distance half that of distance " y " between pivot 4 and pin 56, so that the feed applied to the tool 70 will indicate on the dial gauge the amount of material removed when, e.g. boring a hole. In operation with tool 70 set to distance " x " and requiring adjustment, lever 26 is actuated, thus swinging arm 2 about pivot 4. Pin 56 rotates plate 51 and projection 55 on the latter moves anvil 37a of the dial gauge until the required adjustment is obtained, and arm 2 is then secured to base 1 by nut 18. A pin 76, Fig. 7, secured in base 1 and having a clearance in a bore 77 in arm 2, may be fitted to limit the swing of arm 2, so as to prevent pointer 38 moving through more than 180 degrees, which would give an incorrect reading. Scales 82, 80 may be provided on arm 2 so that after setting the tool the position of pointer 38 is read off on scale 80, and scale 82 is set to the same reading on a line 81, and even though the bezel on dial gauge 32, or arm 2 are moved inadvertently, the operator can reset the tool to the correct position. Similar scales 90, 93 may be provided for recording the position " x " of tool 70, along with a dial gauge 85 which engages the end of tool-holder 64. |
