From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Report from H.A. Royce in Cleveland, Ohio, concerning foundry visits, materials, and processes.
| Identifier | ExFiles\Box 174\2\ img105 | |
| Date | 11th April 1937 | |
| COPY OF REPORT RECEIVED FROM H.R. ROYCE, DATED 11.4.37, FROM CLEVELAND, OHIO. To Me. I am still reserving judgement on the merits of punched cards. The National Cash Register Organisation curiously enough has a control problem very similar to our own with a few differences. For their organisation they showed a set-up which did not use punched cards, and appeared considerably cheaper. Organisation problems I feel I shall not be able to talk about until I have had some time to sit and think about what I have seen. I have visited several Foundries here, and also several Foundry suppliers, as one of the important things in getting good castings over here is sand control. Ferro Foundries produce Graham cylinders, and avoid porosity between the bores due to loose graphite by the following mix :- 30% old steel rails or other bulky scrap. 40/45% scrap iron. 25/30 pig iron. Si. 2.0, C. 3.25/3.30, Mn. .775, S. .12/.13, P. .14 - if you can afford it Ni. 1.0, Cr.{Mr Cra???ster / Mr Chichester} 0.40. Use a fast melting cupola and do not use the first metal tapped for cylinders as it has too high a carbon and will tend to give porosity. Of the suppliers - Federal Foundry supplies are mailing descriptive data and samples of their speciality. Buchage products have given me samples of their pasting sand and core binder. This latter they claim permits cores in aluminium castings to give a little at the moment of solidification. H.{Arthur M. Hanbury - Head Complaints} Dietert has given me a catalogue of all the Dietert sand testing equipment. Dietert is the expert over here, and supplies the whole trade. I expect there are similar machines over in England. Linton Engines are making largish C.I. engines (for boats, out of welded steel crankcases. They say that to prevent cracks you should use the following steel :- C. .12 to .16. Mo. .4 to .6. S .04 max. Mn. .9 max. Si. .15 to .3. P .04 max. Stress relieve after welding for 3 hours at 1100 - 1200°F.{Mr Friese} and furnace cool to 250°F.{Mr Friese} | ||