GB572217A - Improvements in or relating to pipe- and other profiled- bar cutting apparatus - Google Patents

Abstract

572,217. Cutting pipes and bars. AKT. - GES. DER EISEN - UND STAHLWERKE VORM. G. FISCHER. Jan. 8, 1944, No. 392. Convention date, Jan. 9, 1943. [Classes 83 (iii) and 83 (iv)] In pipe and bar cutting apparatus of the kind comprising a rotatably driven casing surrounding the work and carrying a cutter and one or more work supports or steadies adapted to be fed radially towards the work by means of a cam disc, the coupling between the cam and the casing or between the cam and the tool and steadies is such that when the supports or steadies reach the work, they are stopped and the infeed of the tool continues alone. In the form shown in Fig. 1, a casing 1 carries slides 2 and 3 which support steady rollers 4 and a cutting disc 6, the slides being coupled by levers 12, 13 to a roller 11 projecting into a slot 10 in a cam disc 7 mounted on the casing 1. If, while the casing is being rotated, a brake band 9 is applied to the cam disc by a hand lever 8, the disc is rotated relatively to the casing 1 against the action of a spring 18 to feed the slides towards the pipe 5. On contacting the pipe, the feed of the rollers 4 ceases, while that of the cutter continues, the lever 12 swinging about the point 14. The cutting disc 21 has an eccentric bore by which it is mounted on an axle 22 so that it may yield laterally in one direction against the action of a spring 25, Fig. 12. In a modification, the cam disc has two slots on opposite sides, each connected to the slides by levers. The cam disc may be driven and the brake applied to the casing. In another form, Figs. 4 and 5, the levers 12, 13 are dispensed with. The driven member 61 carrying the slides 62, 63 supporting the steadies and a parting tool 68 respectively is journalled in a bearing 69. Pins 64 extend from the slides into curved slots 54, 55 in a cam disc 53. The disc 53, a disc 57 and a disc 56 journalled in a bearing 60 form a cross-guide coupling so that on a braking force being applied to the disc 56 the cam disc may move eccentrically to allow a continued in-feed of the tool 68 after the steadies have engaged the work 67. In a modified form of cross-guide coupling shown in Fig. 7, the cam disc 72 and the disc 71 are carried by guide pins extending radially inwards from a rim 74 formed on the intermediate disc 73. In a further modification, Fig. 9, the slides are replaced by links 91, 92 pivotally mounted on the casing at 89, 90 and operated through guide pins 93, 94 projecting into guide grooves in the cam disc. References 95 and 96 represent a steady and a tool, respectively. Three slides or three links arranged at angles of 120 degrees and carrying a tool and two work supports may be provided.