GB561667A - Method of and means for cutting lengths of metal tubing or the like to produce shaped ends thereto and at a desired angle - Google Patents

Abstract

561,667. Drilling. HANCOCK, G., and BLINKHORN, F. B. Jan. 30, 1943, No. 1618. [Classes 83 (ii) and 83 (iii)] A jig, for use in cutting tubes by an annular cutter of.the required shape to abut other tubes for welding into a frame, has adjustable means for guiding the drill at the required angle of the tube which is clamped against a locating stop. In making struts 42, Fig. 7, to be welded between tubes 43, 44, lengths of tube each sufficient to form the struts are cut from tubing, both ends being shaped to fit the tube 43 ; a single cut then suffices to divide each length forming simultaneously the ends as required at 44. In forming the first end, the short piece cut off may serve as an end stop 39, Fig. 4, to which is welded a piece of tube 41 to engage and locate the cut end of the work 24. The stop 39 is bolted at 40 to one flange of an angle bar 33 that is bolted to the upper member 13 'of the jig provided with seating surfaces 25, Fig. 3; coacting, to clamp the work, with corresponding surfaces 26 on exchangeable blocks 27 dowelled to the lower member 14 of the jig for clamping by screws 29. The jig parts are pivoted at 15 and the part 14 has a handle 20 and pin 19 for engaging a pivoted latch 16 spring controlled at 18. A bracket 11 pivoted at 12 to the jig part 13 has an arcuate slot 23 to pass a stud 22 fitted with a handled clamping nut. An index mark and graduation may be provided. The bracket carries a guide bush 9 for the tubular cutter which is preferably in the form of a crown saw. If the tubes 43, 44 are in mutually perpendicular planes, the stop 39 is turned through 90 degrees and is secured through the holes 49.