Patent GB-1071492-A (GB)
Title: Improvements relating to the cutting of bar and like material into portions
Inventor: PROTTEY STANLEY RAYMOND
IPC: B23D45/18
Filed: 1963-03-16
Abstract: 1,071,492. Sawing. MIDLAND INDUSTRIES Ltd. June 15, 1964 [March 16, 1963], No. 10509/63. Heading B5L. A flying-saw machine comprises an ejector means for ejecting cut-off portions of advancing bar material 14 having gripping means 54 adapted to bear against the side of the advancing material and being rotatable about an axis disposed transverse to the line of advance of the material, and driving means 62 for rotating the gripping means to accelerate the advance of and thus eject the cut-off portion from the remainder of the bar material. The machine has a pair of jaws 12 which are movable towards and away from each other to grip the bar material 14 and are mounted on a carriage 16 movable along bars 18 by a piston- and-cylinder device and the material which may be discharging from an extrusion machine. The carriage 16 has a pivot 22 for an arm 20 which, at one end, supports a circular saw 24, and at the other end is connected to a piston- and-cylinder device 26 for engaging the saw with the material. The ejector means is disposed at the discharge end of the saw machine and consists of a table 38 having horizontal and vertical flanges 40, 42. One end of the table is mounted on a pair of legs 46, and the other end of the table is carried by a plate 50 mounted on the upper end of the driving means 62 which is in the form of an air or electric motor, the body 64 of which is adjustably held by a clamp 72 on an arm 74 carried by a screw 86 vertically adjustable in a rocker member 78 carried by a member 90 upstanding from the bed 84 of the machine; adjustment of the body in the clamp 72 and of the screw 86 in the rocker member provides coarse and fine vertical adjustment for the table, while swinging of the arm provides lateral adjustment for the table and the gripping means 54 which consists of a roller mounted on the shaft of the motor 62. The roller has a resilient surface to provide a frictional grip on the bar material and is opposed by a second roller 56 which is freely rotatable in a bracket 58 adjustably secured to the plate 50. Each roller is associated with wings 20 for guiding the bar material laterally between the rollers. A length control means 94 is adjustably mounted on the table 38 and has a trip arm 96 for actuating a switch 94 controlling a motor operating the jaws 12, the device for moving the carriage, and the device 26 for raising and lowering the saw. A deflector comprising an inclined plate 107 is also adjustably mounted on the table for deflecting the cut-off portions out of the way of the leading end of the remainder of the bar material. Alternatively, the horizontal flange of the table may be hinged to swing downwardly for discharging the cutoff portion. During the initial advance of the bar material, both rollers 54, 56 idle until the leading end of the bar engages the trip arm to actuate the switch so that the devices for moving the carriage, closing the jaws and moving the saw downwardly are operated. The saw is lowered until a lower control 32 is operated to actuate the motor 62 and rotate the roller 54 and to cause the device 26 to raise the saw. The roller accelerates the cut-off portion away from the saw so that its trailing edge is not damaged, the leading edge eventually engaging the plate 107 to deflect the portion sideways. The trip arms drop in front of the advancing bar material and the upward movement of the saw is stopped by an upper control 34 which causes the jaws 12 to open and the carriage 16 to be returned to its initial position. In an alternative embodiment, the gripping means are in the form of endless bands.