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Tools for the Workshop

Tools for the Workshop A Selection of Equipment of Use in the Production and Maintenance of Aircraft and Components lock against the parent metal and adjacent keys. The equipment needed is not elaborate and the work can be done on the site. Pneumatic tools only arc used, which permits the execution of work where there is risk of fire. The method provides a repair which is as strong as the original metal, and may also be an im­ provement in that residual stresses may have been re­ lieved, since the pieces arc not drawn together at the fracture, but the crack filled with new metal. Variants of the process known as Mctalacc and Masterlock provide for cases where the crack has to be scaled against pressure, or carry high concentra­ tions of stress. In all cases the keying pieces arc ground oft" flush with the old metal, as can be seen in FIG. 3. This process provides a means of performing fairly rapid repairs to plant where new or spare castings may be difficult to obtain. A Safety Device A device has been developed to help increase the safety of operation of machine tools and presses. The principle is that in order to start the machine the operator has to press two buttons simultaneously, or within a brief interval of time. It is difficult to cheat A New 5½ in. Lathe this device. If cither button is pressed separately or FIG. 1 shows the Kerry G.C. lathe manufactured jammed or intentionally blocked, the circuit becomes inoperative. Further attempts to start the machine by Kerry's (Engineering) Co. Ltd., Grange Road, will have no effect, and the device will have to be reset Leyton, London, E.10. The headstock is all-geared or the machine switched off completely. FIG. 4 shows with rapid speed selection from two external dials. the device fitted to a Herbcrt-Rccd-Prcnticc die- The feedbox, of the 'Tumbler' type, provides 62 Eng­ casting machine. Further details maybe obtained from lish screw pitches; for metric pitches three change Messrs Alfred Herbert Ltd., Factored Division, Red wheels arc used. The bed is a one-piece casting, and is Lane, Coventry. available as standard, gap or long beds. The com­ pound slide rest is graduated to 180 dcg. and can be Tube-end Fittings swung to any angle on cither side of the central posi­ tion. The feedshaft is separate from the lead screw and A method for the attachment of end fittings to gives seven different feeds when the inch gears arc in tubes by cold rolling has been developed by Messrs use, or 28 when the metric change wheels arc used. The Avica Equipment Ltd., 1 Adams Place, Georges Road, lathe admits 23 in. or 40 in. between centres, according Holloway, London, N.7. The tube is held in holding to which bed is supplied, and the gap bed provides a blocks of the appropriate size and cut square and finished smooth externally and internally. The end swing of 17 in. fitting is then put on so that the end of the tube abuts on the stop flange inside the fitting. A special tool with Repairs to Castings tapered rollers of the correct size is then inserted and A method has been developed for carrying out cold turned with a tap wrench (PIG. 5) and expands the repairs to castings and other cracked parts. Known tube into the fitting. The joint can then be pressure as Metalock, it is executed by Metalock (Britain) Ltd., tested. The method is suitable for use with non- Grand Buildings, Trafalgar Square, London. The stabilized stainless steel, cadmium plated mild steel, principle is illustrated in PIG. 2. Serrated slots arc cut anodized aluminium, or titanium. The use of like across the fracture to accommodate keys of high- materials for the coupling parts eliminates corrosion strength alloy; the spacing and depths arc calculated difficulties, and materials do not have to be chosen for to reproduce the strength of the part before fracture. their ability to be welded or brazed. The keys arc driven home with pneumatic tools and 2$$ Aircraft Engincci. > http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Tools for the Workshop

Aircraft Engineering and Aerospace Technology , Volume 25 (9): 1 – Sep 1, 1953

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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb032336
Publisher site
See Article on Publisher Site

Abstract

A Selection of Equipment of Use in the Production and Maintenance of Aircraft and Components lock against the parent metal and adjacent keys. The equipment needed is not elaborate and the work can be done on the site. Pneumatic tools only arc used, which permits the execution of work where there is risk of fire. The method provides a repair which is as strong as the original metal, and may also be an im­ provement in that residual stresses may have been re­ lieved, since the pieces arc not drawn together at the fracture, but the crack filled with new metal. Variants of the process known as Mctalacc and Masterlock provide for cases where the crack has to be scaled against pressure, or carry high concentra­ tions of stress. In all cases the keying pieces arc ground oft" flush with the old metal, as can be seen in FIG. 3. This process provides a means of performing fairly rapid repairs to plant where new or spare castings may be difficult to obtain. A Safety Device A device has been developed to help increase the safety of operation of machine tools and presses. The principle is that in order to start the machine the operator has to press two buttons simultaneously, or within a brief interval of time. It is difficult to cheat A New 5½ in. Lathe this device. If cither button is pressed separately or FIG. 1 shows the Kerry G.C. lathe manufactured jammed or intentionally blocked, the circuit becomes inoperative. Further attempts to start the machine by Kerry's (Engineering) Co. Ltd., Grange Road, will have no effect, and the device will have to be reset Leyton, London, E.10. The headstock is all-geared or the machine switched off completely. FIG. 4 shows with rapid speed selection from two external dials. the device fitted to a Herbcrt-Rccd-Prcnticc die- The feedbox, of the 'Tumbler' type, provides 62 Eng­ casting machine. Further details maybe obtained from lish screw pitches; for metric pitches three change Messrs Alfred Herbert Ltd., Factored Division, Red wheels arc used. The bed is a one-piece casting, and is Lane, Coventry. available as standard, gap or long beds. The com­ pound slide rest is graduated to 180 dcg. and can be Tube-end Fittings swung to any angle on cither side of the central posi­ tion. The feedshaft is separate from the lead screw and A method for the attachment of end fittings to gives seven different feeds when the inch gears arc in tubes by cold rolling has been developed by Messrs use, or 28 when the metric change wheels arc used. The Avica Equipment Ltd., 1 Adams Place, Georges Road, lathe admits 23 in. or 40 in. between centres, according Holloway, London, N.7. The tube is held in holding to which bed is supplied, and the gap bed provides a blocks of the appropriate size and cut square and finished smooth externally and internally. The end swing of 17 in. fitting is then put on so that the end of the tube abuts on the stop flange inside the fitting. A special tool with Repairs to Castings tapered rollers of the correct size is then inserted and A method has been developed for carrying out cold turned with a tap wrench (PIG. 5) and expands the repairs to castings and other cracked parts. Known tube into the fitting. The joint can then be pressure as Metalock, it is executed by Metalock (Britain) Ltd., tested. The method is suitable for use with non- Grand Buildings, Trafalgar Square, London. The stabilized stainless steel, cadmium plated mild steel, principle is illustrated in PIG. 2. Serrated slots arc cut anodized aluminium, or titanium. The use of like across the fracture to accommodate keys of high- materials for the coupling parts eliminates corrosion strength alloy; the spacing and depths arc calculated difficulties, and materials do not have to be chosen for to reproduce the strength of the part before fracture. their ability to be welded or brazed. The keys arc driven home with pneumatic tools and 2$$ Aircraft Engincci. >

Journal

Aircraft Engineering and Aerospace TechnologyEmerald Publishing

Published: Sep 1, 1953

There are no references for this article.