GB825202A - Improvements in or relating to milling machines - Google Patents

Abstract

825,202. Milling and boring-machines. VICTORIA MACHINE TOOL CO., FRYE, J., and SEIDEL, A. March 21, 1956 [Dec. 22, 1954], No. 37041/54. Class 83 (3). A milling - machine comprises a vertical column 3, Fig. 1, a knee 4 projecting therefrom and carrying a worktable 5, an arm 7 extending horizontally from the top of the column above the table, and a yoke 8 extending down from the arm and carrying a bearing for the outer end of cutterarbor 1, the inner end of the arbor being connected to a driving spindle in the column. The machine may be set-up with the arbor removed, the arm displaced to the left, and a facecutter connected to the driving spindle. The arm may be turned about axis x-x to position the opposite end over the work-table, which end has an angularly-adjustable body 15 carrying an electric-motor 13 for rotating a spindle 12, Fig. 4, and feeding a quill 14, in which the spindle is mounted, and which may carry a milling or boring-tool. The motor drives, via step-pulley 19 and a belt 20, a steppulley 21 secured to a sleeve 22 which may be coupled to a sleeve 25, directly via dog-teeth 30, 33, or via reduction gear between pinions 29, 31. The quill is fed by a pinion 69 on a shaft 67 engaging rack-teeth 70, the shaft being turned either manually via hand wheel 104, Fig. 10, or by the electric motor, when clutch 75, 76 is closed, via change-speed and reverse gearing (not shown), connecting the clutch to pinion 32. The clutch-actuating rod 79 is urged to the release position by a spring 84, and is retained in the engaged position by a projection 97a on a rod 96 engaging a detent in a disc 95 secured to rod 79. Rod 96 may be moved against a spring 97 to disengage the detent and stop the power-feed, either manually by a lever 105, or automatically by bobbin 94 on a shaft 85 being moved axially by a projection 100 on the quill engaging adjustable abutments 98, 99 on the shaft, which is centred axially by springs 90, 93, the feed in either direction being stopped. To provide a positive-stop to downward movement of the quill, a member 109 on lever 105 is pivoted to the position shown, in which it lies between bobbin 94 and a fixed surface 112. In this condition the power-feed-clutch must be held engaged, since the projection cannot engage disc 95.