US1474124A - Rolling mill - Google Patents

Description

Phased Nov. 13, 1923.

' takes lace as smoothly as possib 1n the is tirely or only UNITED STATES.

PATENT. OFFICE.

rnrrz srsmncxn, or .nnmscnnm, GERMANY, ASSIGNOR ro 'rrm rmm: mimemnnonnnn-wnaxn, or ,nussnmaonr, Gasman.

ROLLING MILL. I

'10 following is a full, clear, and exact description.

In such rolling mills the object to be rolled is placed upon a work carrier or mandrel and the latter is so operated upon between rolls-that at each rolling operationonly a short length of the tube is worked,

.whereupon the tube and the mandrel receive' a movement in the contrary direction in order then to be again moved forward -in the original direction, sothat the tube and, if necessary, alsothe mandrel are made to erform a step by step forward motion wit intermediate retrogression, and the tube is made to pass by degrees either enartiall through the rolls. In rolling i s of t e rllilgering type it is necessary- "at the wor .which is discharge by the rolls after each revolution be ain returned to the rolls. Thus it' is essential that the movementof the work is in order to avoid shocks.

.;Previously, the work has been brought back between the rolls, after having been pushed out b means of springs or compressed 'air, t e springs being compressed or the compressed air produced owing to said operation for the return of the work.

Such devices are complicated and frequently a breaking of the springs occurs on account of the extremely high stresses, whilst compressed air devices are subjected to frequent eakages at the packings and pistons and the like, so that all these devices are subjected to great wear, resulting in variations e ing of the work and many irregularities in working.

The invention resides in efi'octing and controlling the feed movements of the work or work carrier above referred. to and in holding the'same in position at a desired point by electromagnetic forces and to this and consists in the provisionof an electromagnetic device preferabl 'comprisin an ironplunge'r, actuated an controlled y a roller solenoid and connected to the work carrier as will hereinafter be more fully-ex lained.

The invention consists of novel and parts and combinations-of the same as will be more fully described hereinafter and then pointed out in the claims.

A particular embodiment ofthe invention s regresented in the accompanying in" orming a part'of' this specification.

Figure 1 is a longitudinal section of the feeding device ofa rolling .mill' of the pilgering type.

Fig. 2 is a modification of a part of the same. I

The carrier for the'work or mandrel a carrying the work glides freely uponthe uides b and is provided with the usual evices, not shown, for its rotation after every stroke. a

The parts 0 of the work-carrier are of bronze or another non-magnetic ,material mandrel rod a together wit the work Z is pushed from the rolls in the direction of the arrow m to the right, the part (1 thus bein pushed out of the solenoid 6, one in er rotation of the rolls the work Z being again freed, the mandrel a will again be pulled by electromagnetic force into the solenoid e, thus the mandrel rod and the work being againreturned. This operation is repeated on each revolution of the rolls. a

The velocit and force of themo'vement is thus depen out on the 'size of the solenoid c and the strength of the current passing through it. The movement accordance withlocal conditions, for in} stance, the conditions 'of the work to be rolled. For this end either, the number of effective solenoid-turns, or the strength of the current maiygrnbealt'ered, or both by means which are own per se.

The movement of the'mandr'el: rod may be influen z-d to a certain degree by means of suitable connections if necessary also by using several coils and-iron parts,'for instance stopping the forward movement at eatures drawoperation the can thus be adjusted in -15 the-same in position and,

e-dcteimined thereturnmovement, so that a brake-andbuffer efiect may be obtained.

Fig.2 shows. a modification '8 several coils 0 with a different "turns.

- Ast'he mandrel rod a moves with very little friction; the movement is very easy and Wear is avoided as Welles all irregularicomprising number of l0 tiesiof workingf resulting therefrom,

' I claim; A l

1. A feeding 'devicefofrollin niills of gth'e 'pilgering type consisting 0 a worklca'rri er and means for moving and holding prising an iron part on the work-carrier and electrical coils working on the iron part and means for feeding the electrical-turns with electrical current' for magnetichlly II energizing- 1M coils. J

-;pqint, and also controlling at 'a. desired point com-- 2 A feeding device for rolling mills o the pil ering type oons'istingof a work carrier an mg en'irqn part on, the W0rk-carr1er and a means for moving and holding thesame in pos t on at a desired point compristrolling means forreguliiting the current in the solenold turns.

3. A feeding device for rolling mills of the I pilgering type consisting of a. work carrier and means for moving and holding the same I rising on iron part on the work-carrier and a in position at a desired point com solenoid containing everal coils and means for controlling the electrical :current in the severalcolls.

y In testimony whereof I have signed my I name to this specification; I

FRITZ STEINECKE.

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