Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 352
1420. SEAMLESS TUBE MAK-ING. — Rolling a solid bar between apair of angular-axled disc rollers opensa cavity within the bar which is furtherexpanded by a second pair of disc rollers.The rolling of the tube between the discspushes the tubular bar over a revolvingconical mandrill. 142T. WIRE-BENDING… … 342 MILL AND FACTORY APPLIANCES. 1423. SEAMLESS TUBE MAKING.—The Mannesmann process. A, «, conical corrugated rolls: B, guide tube; B, hot bar of iron or steel being pushed throughthe rolls; D, mandrill for wideningthe inside of the tube, the hollow be-ing started by the action of the out-side…
Mechanical movements
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