GB496766A - Improvements in apparatus for removing metal from the surface of a metal body by means of an oxidising gas stream - Google Patents

Abstract

496,766. Removing metal by oxidizing gas streams. LINDE AIR PRODUCTS CO. July 16, 1937, No. 19690. Convention date, July 16, 1936. [Class 83 (iv)] In apparatus for removing metal from the ' surface of a metal body such as a steel billet, one, or a number, of blowpipes for applying an oxidizing gas stream obliquely against said surface, are movable into or out of operative position relatively to a carrier which movement simultaneously controls in each blowpipe the gas supply thereto. The billet P, Fig. 1, is mounted on a table T which is moved along under the blowpipes N or the latter are moved over the surface of the work. A support K is arranged for vertical and lateral adjustment and carries, pivoted to it at 14, a clapper 15 the lower end of which abuts an adjustable stop 49. Pivoted to one of the vertical edges of the clapper is a U-shaped carrier 22, Fig. 2, which may be adjusted to set the blowpipes at an angle to the work-axis by a nut 46. Upper and lower parallel links 35, 36 respectively, Fig. 1, are pivoted within the carrier and support uprights 38 to which the blowpipe units 40 are fastened for a limited amount of horizontal rotation. Stops 86 on the upper links limit the downward movement of the blowpipes and compression springs 91 bearing against extensions of the upper links tend to maintain the blowpipes in their lowermost operative positions. Handles 51, 52, 53, Fig. 2, operating through wires, enable the blowpipe units to be raised out of their operative positions and held in a raised inoperative position. Three blowpipe units may be connected by a bar 64, Fig. 5, to be raised simultaneously by one handle while two further units 38 are individually operable by the other two handles. Links 84, Fig. 1, are connected to the uprights supporting the individual blowpipe units and when the latter are moved upwardly, either by striking an obstruction or by the handles, a cam-piece 83 fastened to the link 84 slides within a valve chest V supported by the carrier 22 and shuts off the supplies of desurfacing oxygen, acetylene, and combustion supporting oxygen to the raised blowpipe unit. The latter may be separately water-cooled by hose connections 75, 76.