GB837850A - Machine-tool head - Google Patents

Abstract

837,850. Boring and facing-machines. INNOCENTI, SOC. GENERALE PER L'INDUSTRIA METALLURGICA E MECCANICA. July 8, 1957 [July 7, 1956], No. 21531/57. Class 83 (3). In a tool-head for attachment to milling and boring-machines to facilitate the internalmachining of split hollow-workpieces, a body 1, connectable to the machine face at 4, Fig. 2, carries a tool-spindle 3 and spindle-mounting means which form a semi-cylindrical projection. Tools or tool-holders 7 are mountable at each end of the spindle 3. The spindle 3 and the holder are driven from the machine by a shaft 25, Fig. 7, clutch 24, shaft 18, and worm- and-wheel 28, 29. The spindle, consisting of two sections 3, 31, connected by splined coupling 46, has an integral gear 45 driven by an idler 43 driven by the worm-wheel 29. The holder is driven independently of the spindle 3 by the wheel 29, which has an extension 31, Fig. 8, journalled at 32, 33, in a sleeve 34 held in a bore 35 of the body 1. The extension 31 engages shafts 37, 38, by splines, to enable disconnection of shaft 38. The spindle 3 is disengaged by actuation of one of two levers 51, Fig. 2, mounted at each side of the head and pivoted at 52, and a gear 53, Fig. 9, on pin 52, meshing with gear 54 on a shaft 55 carrying a fork 56 engaging an annular groove in a gear 42 to move it axially from idler 43. A gear 8, on shafts 37 or 38, Fig. 8, drives the holder, meshing with internal teeth 11 of a small holder 6 or external teeth 12 of a large holder 7. Feed of slides.-A slide 14, Fig. 14, on the holder 6, is adjusted by a lead-screw 62, driven by bevel-gears 65, 66, and shaft 67. The shaft 67 is coupled at 69 to a shaft 71 connected at 73 to a shaft 74 carrying gears 76, 77, meshing with gears 78, 79, Fig. 11, on a shaft 81 connected through coupling 92 to a shaft 93. A worm-wheel 95, on the shaft 93, meshes with a worm 96 on a splined shaft 97, Fig. 10, connected by a slidable clutch 98 to a feed-shaft 99 of the machine. Alternatively, the shaft 97 is driven through a sleeve 101 integral with a worm-wheel 102, which meshes with a worm 103, Fig. 12, driven by a coaxial gear 104, gear 105 and motor 106. The spindle-carriers 2 are interchangeable to accommodate spindles of different diameters, and may be positioned below the head. The machine-spindle passes through the tool-head, Fig. 2, and is supported by bearings 125, Fig. 7, to allow milling- operations without re-setting of the work or removal of the attachment. The head may be adjusted angularly about an axis 18 when the spindle 17 has been removed. Additional holes may be provided in the head to accommodate the spindle 17 in different positions of the head.