GB442124A - Method of and apparatus for producing hollow metal articles - Google Patents

Abstract

442,124. Rolling cupped articles &c. BENEDETTI, F. DE, 6, Via Vanchiglia, Turin, Italy. April 27, 1934, No. 12756. Void [Abridged as open to inspection under Sect. 91 of the Acts, Oct. 29, 1934]. [Classes 83 (ii) and 83 (iv)] A cup blank 6, Fig. 1, is reduced between one or more small rolls 2 and a mandrel 1 having the shape of the desired article, the mandrel being relatively rotatable to the rolls. The cup is held on the mandrel by a cover plate 5 abutting against a centre pin 4. The axis of the small rolls 2 may be inclined to the mandrel and the small roll is traversed down the sides. The tubular blank in Fig. 11 may be reduced as in Fig. 9 by a pair of small rolls acting internally and held separated by a support 10, or it may be reduced by one internal roll only. In Fig. 9 the rolls are radially adjustable for spacing and the mandrel may have grooves 12 into which the metal may be rolled to form a collar on the tube. A tapered cup may be produced as in Fig. 14. In Fig. 15, the plate 5 forms a depression in the cup and the sides are reduced by drawing the roll 2 upwards. Other forms are also shown.