US1791962A - Apparatus for turning over the work in roll trains - Google Patents

Description

H. HOLTUS Feb. 10, 1931.

APPARATUS FOR TURNING OVER THE WORK N ROLL TRAINS Filed May 26, 1925 2 Sheets-Sheet l W 290 -2 I y:

Feb. 10, 1931. v Hou-us 1,791,962

APPARATUS FOR TURNING OVER THE WORK IN ROLL TRAINS Filed !lay 26, 1925 2 Sheets-Sheet 2 Patented Feb. 10, 1931 UNITED STATES HERMANN' HOLTUS, OF ESSE-N,

GERMANY, ASSIGNOR TO- rnonmx PATENTQOI'FFICE AKTEN- GESELLSCHAFTFR BERGBAU UND HTTENBETRIEB ABTEILUNG RUHRORT, DUIS- BURG-RUHRORT, OF DUISBURG-RUHROBT, GERMANY, A CORPORATION OF GER- MANY APPARATUS FOR TURNIN G OVER THE WORK IN ROLL TRAINS Application filed May 26, 1925, Serial No. 32,930, and in Germany May 28, 1924.

This invention relates to devices for turnprising a plunger with a tapering head which moves lengthwise in the direction of tilting and grips the ingot between itself and an abutment. When the plunger is thrust forward against an ingot lying on the roller track of the rolling-mill, it is intendedto Carry with it theside of the ingot remote from the abutment, a certain grip being exerted owing to the space between the plunger and the abutment diminishing. W

In some devices of this kind, the abutment is a counteracting plunger with a tapering head. 'These devices have the disadvantage that they can .only be used for tilting billets of particular cross-sections, more particularly of elongated cross-section, since both plungers move in guides that cannot Shift laterally, and so the space'between the gripping surfaces must continually decrease as the plungers are thrust forward.. As a consequence of this, for many cross-sections of billet the grippng pressure becomes so great after a small angle of tilt that the billet is jammed between the plunger and abutment. It has, it is true, been proposed to mitigate this defect, for instance for billets of `rectangular cross-section, by allowing a certain amount of play between the plunger and its guide so that when the billet takes a diagonal position the head of the plunger can yield laterally. But this only provides for tilting rectangular. billets of certain dimensions depending on` the play allowed.

The present invention provides for turning ingots, billets or the like of any crosssection through any desired angle; according to it, the abutment' or the plunger is held yieldingly' under load by a gripping force mension of the billet as it tilts. The gripping force is overcome by the jamming pressure and the abutment or the plunger yields laterally. So it is impossible for a billet of any cross-section to become jammed, and any indenting of the billet that may occur where it is gripped is so small that it will be rolled out.

Itthe surface of the abutment hearing on the billet is vertical, the billet may possibly Shift along the abutment when the plunger advances to tilt it. This may be prevented by inclining the working surface of the abutment to the vertical and towards the plunger. The pressure of the abutnent then has always a vertical downwardly directed component. 2

When the rolls have gripped the billet, the parts of the turning device which project above the roller track must be withdrawn below it, so' that they are not exposed to the blows of the tail end of the billet and do not I hinder the supervision nor diminish the accessibility of the rollers. *For this purpose, according to the invention, the plunger and abutment are Inounted on the slide running cross-wise of the billet beneath the roller track, in such a manner that they can be raised and lowered. The' abutment can be readily and quickly presented against the billet to be turned, and the tilting plunger then thrust upward.

To enable one turning device to be used for tilting in either direction, two plungers are employed having tapered heads and eachcapable of being raised and lowered; according'to the direction tilting, the' one of theni is thrust upwardfor tilting while the other yieldingly held plunger serves as the abutment. It is advantageous to pivot one plunger about an aXis parallel with the billet.

To prevent undesired-.shift of the billet along the abutment, it has already been proposed to make the abutment saw-like. In said known tilting devices, tilting is effected by two toothed cheeks approached together,

their teeth being oppositely drected.

- According to the invention, the teeth' of both plunger'heads are directe-d towards the roller track, since each-plunger mayserve as A the -abutment, and either one may be thrust forward in the same direction according to the desired direction of tilt.

It would be more difficult to control the turning device, if turning took place at different speeds for different cross-sections of billet. This may be avoided according t the invention, by giving the tapered head of the plunger a parbolodal or ellipsoidal form&

The stroke of the plunger for a given angle of tilt is then the same for billets of large or small cross-sections, and the plunger traverses the same working path. l

Various forms of Construction of the turning device are illustrated by way of example in the accompanying drawing:

Fig. 1 is a diagramr'natical partial longi- V tudnal section through one preferred form i of onstruction,

Fg. 2 shows a modification of the plunger heads on a larger scale,

'Fig. 3 'shows the same modification used for tlting in the opposite direction, and

Fig. 4 shows another Construction of the adjacent faces of the heads illustrated in u Figs. 2'and 3.

\ The plane of the roller track is indicated in the figures by the line X-X. Beneath the roller track a carriage 2 is mounted on .fixed rollers 1 so as to be movable trans'versely to the billet as indicated by the arrow P. Two plungers 3, 4 are located side by side npon the carriage, longitudinally movable in . guides 5, 6. The' guide 6 of plunger 4 is Secured in vertical position upon the'carriage 2 anda shaft 9bears'a toothed wheel 7 engaging in a rack 8 upon the plunger so that the plunger' is mo'va le vertically 'up and down. The guide 5 of plunger3 is revoluble upon a shaft 23-mounted in a fixed bracket 21 of the cari riage 2 parallel with the billet'to be turned.

Upon the shaft 23 there is also a pinion 24' engaging a rack 25 in the plunger 3 to move it up and down. 'A rod 10 is pivotally connected with the upper part of the guide 5 and at its other end to the short arm 11 of a bellorank lever which rotates upon a pivot 12 on the guide 6 and carries on its longer arm 13 i a weight 14 by which the plunger 3 is pulled I toward the plunger 4. The plungers 3 and 4 are kept a certain minimum distance apart by adjacent stops 15, 16 thereon."

. The heads 17 18 of the plungers 3, 4 are formed as rollers revoluble about axially project'ng pivot bolts 26, 26' of the plungers. The heads of both plungers taper towards the top, the head 18, however, having a curved taper while the head 17 is an ordinary trun-' cated cone` y Prior to the tilting of the billet 19 lying on the roller track, which billet is shown by way of example as having a'rhomboidal cross section, the head 17 of plunger 3 is in the osi-tion shown in dot-and-dash lines in ig, 1 while the head 18 otplunger 4 is in the 'position shown in full lines in said figure; that is to sa roller track. Ti? the billet 19 is to be turned in the direction of the arrow Y, Fig. 2, plunger 3 is raised by nechanism (not illustrated) serving to rotate the pinion 24 until it projects, above' the roller track X-X, and

the carriage 2 is then moved transversely until the head 17 Contacts with the billet. The plunger 4 is now also raised until its head engages the billet 19 as indicated in full lines in Fg. 2. As the plunger 4 is raised further the billet l9 turns into the intermediate position'shown in dotted lines in Fig. 2 in which it is grippedlbetween the heads17 and 18, the

head 17 serving as the abutment. If the billet 19 has to, be turned into the upright position indicated in dot-and-dash linesin `Fig 2, it

both heads are below the i would be indented'on the further raising' of plunger 4 unless plunger 3 were movable transversely to the roller track. Since, however, in accordance with the invention, the head 17 is held against the billet 19 with 'a regulable pressure determined by the weight 14, it can yield, .and does yield, whenthe further raising of the plunger 4 increases the gripping pressure to such an extent that crushing of the billet might occur. It thus comes into the position shown in' dot-anddash lines in Fg. 2, the plunger 3 rotating about its shaft 23.

Thus, the distance between the two heads 17, 18 diminishes .until the gripping pressure has reached a'predetermined' amount, whereupon the distance is 'automatically again increased'so thatindentation of the billet at the point where it is gripped is avoided or at any rate is so small only that it will certainly disappear in further rolli'ng'. 'Billets of any cross-sections whatever may be tilted with the* aid of the improved turning device through any angle without damage to 'the billet.

When thedesired tilting is completed, the grip upen the billet is' so far slackened by slig'ht withdraw'al of the plunger 4 that the billet can be carried forward by the roller track, the heads 17, 18 guidng the billet in its tilted position.

When the rolls have gripped the billet, both plungers 3, 4 are withdrawn by means of thepinions 7, 24 until they lie beneath the plane -X. Their heads'17, 18 are then not expsed to the blows ofthe tail endof the 'billet 1 9 'and also they do jot interiere with the creases until in the position shown in dotted lines the gripping ressur'e is so great that on further advance of the head 17 t overcomes the ressure exerted by the weight 14.` The hea 17 then yields so as to permit tilting of the billet without damage into the sition illustrated in dot-and-dash lines in Fg. 3.

The part of the surface of the truncated conical head 17 which contacts with the billet 19, may be perpendicular to the roller track as shown in Fig. 1,' that is to say, it may be vertical. But if the friction between the head and the billet is too small, the billet may possibly be lifted from the roller track which is not desired. 'Inthe construction shown in Fig. 2, this possibility is obviated by placing the head 17 at such an angle to the vertical that when tilting the part of its surface contacting with the billet' is inclined to the vertical and towards the plunger 4, say for example by an angle a. When the plunger 18 is advanced, the counter-pressure on the billet 19 has then a .downward Component which prevents the billet lifting.

Lifting of the billet may also be prevented as indicated in Fig. 4' by making the surface of the heads 17, 18 toothed, the points ojthe teeth 20 being directed downward and so acting to 'restrain the billet from upward movement.

The heads 17, 18 of the plunger-s 3, 4: may alternatively be fast upon' the plungers.

If the head 18 of plunger 4 is made paraboloidal or ellipsoidal in form, the stroke of the plunger is substantially the same for the same angle of tilt whether the billet be of large or small cross-section, so that the plunger describes the same workin path. This materially simplifies control o the device.'

at I claim, is

1. In a'device for tilting ingots or the like work-pieces, the combinaton with two plungers having tapered heads between which the work-piece is gripped, either of said plungers serving as an abutment, of means consisting of a weightedleveroperatively attachedto one of said plungers for yieldingl holding it up to its work by 'a' gripping orce actng transversely to the work-piece.

2. A Construction as specified in claim 1, in which the surface of the abutment plunger acting upon the work-piece is inclined to the vertical and towards the other lunger.

' 3. In a construction as speci ed in claim 1, a carriage transversely movable to the workpiece and upon which said plungers are mounted in up and downmovable fashion.

4. In a construction as specified in claim 1,

means for advancing one or the other of said plungers for tilting according to the direction of tilt.

5. In a Construction as specified in claim 1, a 'shaft parallel with the' work-piece and about which the yieldingly held plunger is rotatable.

6. Aconstruction as specified in claim 1, in which the tapered plunger heads are toothed, the teeth of both plunger` 'heads being 'directed downwards.

7. A Construction as specified in claim 1, in which the tapere'd head of one plunger has a signature. HERMANN HOLTUS.

curved taper while that of the other plung-

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