| 摘要 |
1,014,129. Copy-milling. CINCINNATI MILLING MACHINE CO. Nov. 13, 1964 [April 10, 1964], No. 46392/64. Heading B3K. [Also in Division F2] A milling machine comprises a spindle carrier 10 having a rotary spindle 11 eccentrically supported in a quill 13 for movement in an arcuate path about the axis of the quill, and means for simultaneously reciprocating the quill axially and swing- ing the spindle back-and-forth, the means comprising a pair of cams 59, 99, rotatably supported in the carrier, a pair of driven members 27, 31, supported in the carrier for axial movement, means for reciprocating each drive member in response to rotation of its respective cam and including an adjustable linkage for varying the length of stroke of the drive members, and means for rotating the cams at a reduced rate from the rotation of the spindle. The machine is designed to enable a cam-relieved form-milling-cutter 140, Fig. 7, which is under-size due to sharpening, to be moved axially and radially to produce a full-size slot. The quill 13 can be adjusted axially and reciprocated by rotation of a nut 24 either by rotating or axially moving the worm 27 which engages external teeth on the nut. The spindle 11 rotates in a sleeve 12 carrying a gear sector 29 engaged by the rack 31. The rack 31, Fig. 4, is reciprocated to swing the sleeve by the cam 59 engaging a follower 57 attached to a boll-crank 53 swinging on a fixed pivot 54 and connected to the rack by a block 38 sliding in a grooved block 35. The block 38 is carried by a vertically-adjustable, sliding bar 40. The worm 27 is reciprocated by similar means, the movement of a scale on the quill being observable through an optical viewing device. The cam 99, Fig. 8, for actuating the latter means is mounted coaxially with the cam 59. The cams are rotated by a motor 109 which also rotates the spindle 11 through gearing 120, 121, the latter two gears oscillating relatively to each other as the sleeve 12 is oscillated. The spindle 11 makes at least two revolutions for each revolution of the cams. A cam surface is provided on the periphery of the cam 99 which can co-operate with a plunger during setting-up to indicate the axial position of the quill. |
