Patent GB-756432-A (GB)
Title: Machine for use in profile-cutting of pipes
Inventor: GARDNER JOHN ALFRED
IPC: B23Q27/00
Filed: 1953-01-29
Abstract: 756,432. Dividing by fusion. BRITISH OXYGEN CO., Ltd. Jan. 20, 1954 [Jan. 29, 1953], No. 2605/53. Class 83 (4). A machine for profiling metal pipes by flame cutting has a base 1, a support 3 for the pipe including a turntable 2 rotatable about a vertical axis, a main carriage 6 movable longitudinally of the base, a housing 8 on the carriage in which a member 16 is rotatable about an axis parallel to the base axis, a cross carriage 11 transversely movable on the main carriage, a post 14 on the cross carriage to which a radial arm assembly is coupled and a carrier arm 20 for the nozzle, connected to the assembly by a universal joint and extending from the radial arm and sliding non-rotatively in a bearing 19 radially adjustable in the member 16. The main carriage has wheels 9 running on rails 5 on the base and the cross carriage has wheels 15 running on rails 10 on the main carriage. The member 16 is rotatable by a hand wheel 17 and the arm 20 sliding in the bearing 19 also slides in a bearing 26 slidably mounted in a slot in a vertical post 13 of the cross carriage. The carrier arm is connected to an arm 30 pivoted to the post 14 and the position of the universal joint is adjustable along the arm 30 and the arm 20 is telescopic so that the arm 30 may swing either forwards or rearwards of the post 14. The position of the pivot 31 for the arm 30 is adjustable in a slot in the post 14 and the latter is itself adjustable about a vertical axis. A pin 36 fixed to the cross carriage extends through a slot in the main carriage to engage a slot in a bar 38 adjustable on the base to lie at right angles to the base axis or up to 45 degrees on either side of this position. To profile pipe parts to form a junction as in Fig. 6 the pipe 42 is arranged on the support at right angles to the base axis and with it axis intersecting that of the member 16. The nozzle is set in the longitudinal direction and the arm 30 and carrier are set so that the arm 30 is of length equal the radius of the pipe 42 and swings to the rear. The bearing 19 is adjusted to lie at a radius equal to that of the pipe 43 and the bar 38 is at right angles to the base axis. On turning the handle 17 the member 16 is rotated taking the carrier 20 with it, the cross carriage is reciprocated and the arm 30 rotated in a circular arc. To profile the pipe 43 it is set with its axis along that of the member 16, the nozzle is turned through 90 degrees and the arm 20 is adjusted so that the arm 30 swings forwards. To produce an angled joint in pipes 42, 43 as in Fig. 7 the post 14 is set at an angle to its last position and the bar 38 is angled across the base so that as the cross carriage reciprocates the main carriage is also reciprocated. Off set square and angled joints and mitres may be profiled. In a modification the radial arm 30 is of U-shape, the cross-piece is connected to the carrier 20 and the limbs each carry a roller, one sliding in a vertical slot in a post and the other in a horizontal groove in a post the height of which is adjustable. With the rollers equidistant from the cross-piece the arm rotates in a circular arc for profiling pipes as in Fig. 6 but with the rollers at different distances from the cross-piece the latter moves in an ellipse for profiling pipes as in Fig. 7.