US1670256A - Work-piece-shifting device for use in connection with reciprocating or oscillating rolling mills - Google Patents

Description

May 15, 1928. 1,670,256

K. GRUBER ET AL WORK PIECE SHIETING DEVICE FOR UsE 1N CONNECTION WITH RECIPROO'ATING OR OSCILLATING ROLLING MILLS Filed Dec. 9. 1925 2 Sheets-Sheet l1 E Q f m MM s u May E5, 1928. 1,670,256

K. GRUEEZER "ET AL. WORK PIECE SHIFTING DEVICE FOR USE IN CONNECTION WITH RECIPROCATING OH OSCILLATING ROLLING MILLS Filed Dec. 9 1925 2 Sheets-Sheet 2 Patented May 15, 1928.

lUNITED STATES PATENT oFFlcE.

yKARLGENERE, F BHEYDT, AND ALBERT STAPPEN, OF MUNICH-GLADIBACH,

GERMANY.

WOBK-PIECE-SHIFTING DEVICE FOB USE `IN CONNECTION WITH REGIPIROCATINGlL 0R OSCILLATING ROLLING MILLS.

Application tiled December 9, 1925, Serial No. 74,342, and in Germany September 15, 1925.

Our invention relates to a shifting device for the work-pieces to be rolled in a reciproeating or oscillating rolling mill of the type in which the work-piece is moved I rearwardly by the rollers of the mill, i. e. while the rolling proceeds, and is then moved forwardly by means separately provided for this purpose so as to assume its former position in which it is ready for the next rolling phase, the rolling being, thus, ef-

ected alternately, as is known with rolling vmills of the typein question. Our inven. tion does not relate to these mills, but to the work-piece shiftin device that shoves the work-piece`back ater the rolling or, more precisely, forwardly into that position from which it is being moved rearwardly during every rolling phase.

The shifting device'may be of various description. It may be constituted by a. suitable arrangement and combination of mechanical parts, and the driving power may be a spring or springs, compressed air, steam, a liquid under pressure, .and the like.

25 The means employed for shifting the workiece back after every rolling phase must e active, however, also while a rolling phase is going on, viz. to brake the moving masses in order to have brought them to standstill when the. respective rollin phase has reached its end. On the ot er hand the Workiece must be driven forward as speedi y as possible, but near the end of this stroke also this movement must be damped by a buffer, for instance by air compressed by a pistonconnected with the work-piece.

It is obvious that the braking action mentioned in the preceding paragraph, as Well as the action of the buffer, constitute important features as regards the speed of the rolling mill, its efficiency, the security of service, and other' essential points, still, the existing rolling mills of the type in question .are deficient in those respects, and it is the object ofour invention to do away with this deficiency.

A particularly important feature connected with the means we have designed for the purpose in view consists in the provision of a finely adjustable control for the work piece shifting device whereby it is rendered possible to accommodate the device to all, re quirements of the service so that the .rolling procedure can becarried through wlth the smallest expenditure of power, aswell as remarkably quick and reliably.

In order to make our invention more clear, we refer to the accompanying drawing in which Figure l is a diagrammatic view showing by Way of example an embodiment of our invention, this' constructional form consisting of a cylinder and piston and additional members shown in axial section, the rolling mill being merely indicated b a pair of rollers on the lefthand side of Fligure 1, and Figure 2 is a similar view of a slightly modified form of our invention.

There are on the lefthand side of Figure l two arrows l and II. The arrow I indi- Cates that direction of motion in which the Work-piece t is being moved rearwardly simultaneously with the rolling procedure, this movement being effected by the rollers lc of the rolling mill, whereas the arrow II indicates that direction of motion in which the work-piece t'is being shoved forward by the motion-reversing means provided forx this purpose and being illustrated in the righthand half of lFigure 1, it being understood that there islshown merely one constructional form by way of example.

a denotes a cylinder in which a piston d can reciprocate. The Huid under pressure,

say steam or compressed air or water,.enters` through the branch b and is controlled by the valve c which is controlled itself by means of a rod f having a reduced end f1. The other end of the rod f is carried in a sleeve Z coupled with a connecting rod m, as well as with a hand-wheel k, the connection of these members beingsuch that the total length of the members f m may be varied .by turning the wheel la, in one or the other direction whereby the position of the reduced end f1 relatively to the valve c may be varied. This reduced end co-operates with a roll fn connected with the valve c by a rod 0. The valve is closed when the roll n bears upon the reduced end f1 of the rod f, and is open when the roll bears upon the non-reduced portion of said rod, and the points of time of opening and closing the valve may be determined by adjustin the total length of the coupled members Z m according to the requirements. The rod m is connected with a lever p connected at its upper end with a od g hinged to a standard r supporting. the sleeve l, and at its of its pat operation of the pressure o lower end with `a member e connecting the piston rod d1 with the mandrel s carrying the work piece t.

If steam or compressed air is used as driving fluid for the piston d it is possible to work with expansion, as well as without expansion, as the length of the admission period may be adjusted by means of the hand-wheel h quite4 as' desired or necessar Il, has already been mentioned that the movement of the piston in the direction of the arrow II is to be damped and finally broken by a buffer. In the constructional form shown air is employed for this urpose. The cylinder space lefthand rom the piston d is illed with air, that space communicating with 'the atmosphere through the apertures z' of the cylinder a. These apertures are located about midway of the stroke of the piston d which latter covers said apertures about at vthe commencement of the second half of its stroke, when the air enclosed in the leithand cylinder chamber will he compressed more and more and act as a buffer which nally stops the piston. It will be remembered that the piston, the piston rod, the mandrel, and the workpiece, travel in this direction when the rollers of the rolling mill are not in active engagement with the work-piece owing to their known sectional shape, but as soon as the work iece has reached the lefthand end it is engaged by the rollers and worked b them and driven back in the direction o the arrow I..

In the arrangement shown' in Figure 2, there is illustrated means for regulating or varying the buier forming means and the pressure operable driving means. Instead of providing the openings z' in the cylinder a', valve means c similar in construction and operation to the valve means a in the rst form is provided for formin the buffer, the adjustable operating rod eing duplicated as shown at F and F, the said rods F", F being connected to a cross head slide 1" for operating respectively the valve means c for the buifer and the valve means c equivalent to c in the other Jrorm, for the admission of the pressure operating medium for driving the piston. The operating means for the slide is substantially similar to that shown in the lirst form, the lever p being connected to the member e and also connected by the lever g to a stationary part of the casing of the valve means c and by connecting rod m to the cross head vslide r. By this arrangement which operates substantially the same as the preferred form it is apparent that the resistive force of the buffer forming means is re lated or varied simultaneously and proportionately with the erab e driving means. The parts not speci cally mentioned are constructed and voperate the same as the corresponding arts in the first form and bear correspon ing but primed reference numerals.

We claim:

' 1. A work-piece shifting device for use in connection with reciprocating or oscillating rolling mills, comprising, in combination, means adapted to drive the work-piece through between the rollers of the mill while they areout of active engagement therewith, means adapted to serve as a buffer near the end of this stroke, and means for varying the eiect of the latter two means.

2. A work-piece shifting device for use in connection with reciprocating or oscillating 'rolling mills, comprising, in combination, means adapted to drive the work-piece through between the rollers of the mill while they are out of active engagement therewith, means adapted to serve as a buffer near the end of this stroke, and means for varying the eiect of the latter two means while the device is in operation.

3. A work-p'ece shifting device for use in connection with reciprocating or oscillating rolling mills, comprising in combination, a work piece carrying member, means adapted to drive the work-piece carryin member with work-piece thereon throu and between the rollers of the mill while they are out of active engagement therewith, means adapted to serve as a buffer near the end of this stroke, means for regulating the latter two means, and means for operating the regulating means positively from the workpiece carrying member.

4. A work iece shifting device for use in connection with reciprocating or oscillating rolling mills, comprising in combination a work piece carrying member, pressure operable driving means for driving the carrier with the work iece thereon through and between the rol ers of the mill while they are out of active engagement therewith, means adapted to serve as a buffer near the end of this stroke, and means for varying the action of the pressure operable driving means.

5. A work piece shifting device as claimed in claim 4 wherein the means for varying the action of the pressure operable driving means is operably connected with the work piece carrying member.

6. A work piece shitting device as claimed in claim 4 wherein the means for varying ,the action of the pressure operable driving means is manually adjustable during operation of the device.

7. A work iece shifting device for use in connection with reciprocating or oscillating rollin mills, comprising in combination with t e mill rollers, a work iece carrying member, pressure operable riving means for advancing the carrying member with the Work piece thereon through and between the rollers while they areY out of active engagement therewith, the work piece carrying member being returned by the rollers, means adapted to serve as a buffer near the end of the advancing stroke of the pressure operable driving means, means for regulating the action of the pressure operable driving means, and manually-adjustable means for operating the regulating means positively 10 from the work plece carrying member durin the return stroke of the latter.

n testimony whereof, We have signed our names lto this specification.

" KARL GRUBER.

ALBERT STAPPEN.

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