Patent GB-348157-A (GB)
Title: Improved process and apparatus for shaping and cleaning up ingots to facilitate subsequent rolling or forging operations
IPC: B23Q35/10
Filed: 1929-11-05
Abstract: 348,157. Turning ingots. WALDRICH GES., H. A., Siegen, Westphalia, Germany, and EYERMANN, P., 26, Hohlweggasse, Vienna. Nov. 5, 1929, No. 500/31. Divided on 342,376. [Classes 83 (i) and 83 (iii).] Lathes.-In a process and turning apparatus for cleaning up non-circular ingots as a preliminary step in the production of finished or semi-finished rolled or forged articles by means of a former which is shorter than the work and is mounted immovably in the direction of its length, the lathe may carry several cutters for turning the whole length of the work in one traverse along the former or the former may be removably attached to one end of the work for turning the part adjacent thereto, after which this profiled portion of the work is used as the former for completing the turning operation. In the first construction the apparatus consists of a copying lathe comprising a bed 22 having guides for a saddle 20 on which is mounted a transverse slide 25 carrying the tool-support k. Springs on the saddle press a roller 26 on the slide and the turning tools b, b<1> against the former a and the work f respectively. The former is rotated in unison with the work by gearing 2 connected to the headstock spindle 4 and a coupling 45 is provided, having arcuate slots and screws, to allow rotational adjustment of the former in relation to the work. For axial adjustment of the former it is screwed at 41 on its shaft 1 and is provided with lock-nuts 43, 44. When two tools are used the former is half the length of the work and tools may be provided on both sides of the work. In operating on the first non-circular forging &c. f of a batch, the former is adjusted so that the work may be cleaned up with a minimum of material removed, this adjustment then serving for all subsequent forgings of the same batch and the tools being adjusted on their supports only to vary the depth of cut if necessary. The work is driven at c and is supported by a centre d. In the modified construction a short former a<1>, Fig. 4, is rotatably mounted on the lathe centre w and is driven with the work by means of pins 55 or by shafts and gearing from the main drive of the lathe. The roller 26 is pressed by springs 28 against the former and a portion f<1> of the work is turned continuous with the former, this portion serving as the former for the remainder of the work when the roller 26 rides off the former a<1>. The former a<1> may be attached to the other end of the work near the chuck c and more than one tool may be used. In a further modification a short former a<11>, Fig. 5, is mounted on the smaller end of the work f and is used to control the tool b in turning a portion f<11> on the work. The former is then removed, the positions of the roller and tool reversed so that the extreme end of the work may be turned with the portion f<11> as a former, and the roller and tool are again interchanged for finishing the work with the previously turned portions as the former. Milling- cutters may be used in place of the turning tools shown.