US3318132A - Carrier for auxiliary devices on a cross rolling mill - Google Patents

Description

y 9, 1967 J. HOLUB CARRIER FOR AUXILIARY DEVICES ON A CROSS ROLLING MILL Filed June 30, 1964 INVENTOR United States Patent 3 318 132 CARRIER FOR AUXILIARY DEVICES ON A CROSS ROLLING MILL v Jiii Holub, Prague, Czechoslovakia, assignor to Smeralovy zavody, narodni podnik, Brno, Czechoslovakia Filed June 30, 1964, Ser. No. 379,126 Claims priority, application Czechoslovakia, July 6, 1963, 3,920/63 11 Claims. (Cl. 72-250) This invention relates to cross-rolling mills, and more particularly to a carrier for holding auxiliary devices in proper spatial relationship with the rolls of the mill. In its more specific aspects, the invention is concerned with cross rolling mills in which two rolls rotate about parallel axes and are equipped with wedge-shaped circumferential ridges for shaping stock which passes axially therebetween.

Mills of the afore-described device require auxiliary devices such as feeding devices, abutments, guiding sleeves for the stock being rolled, and the like which have to be positioned in a plane equidistant from the roll faces. It is conventional to support a carrier for such auxiliary devices on the mill stand by means of brackets which permit adjustment of the carrier position. Such adjustment becomes necessary whenever the spacing of the roll faces changes either because of roll adjustment for a different stock size, or because of roll wear.

Adjustment of the carrier position on the supporting brackets, or adjustment of the bracket position on the mill stand is time consuming, and is a source of error. Yet, proper centering of the carrier and the devices sup ported thereon is critical in cross rolling, particularly when using rolls with wedge shaped ridges on the working faces of the rolls. Even a slight inaccuracy in the carrier position causes the production of defective work.

The primary object of the invention is to provide automatic adjustment of the carrier position whenever the spacing of the rolls is being changed.

With this object and others in view, as will hereinafter become apparent, the invention in one of its aspects resides in a rolling mill having two rolls mounted for rotation about spaced axes which extend in a common direction, at least one of the rolls being adjustable transversely of the common direction, and a motion transmitting mechanism which is interposed between the movable roll and a carrier of the type discussed which moves the carrier on fixed guides a first distance in the direction of roll adjustment when the movable roll is moved for adjustment over asecond distance, these distances being related by a fixed numerical ratio.

Other features and many of the attendant advantages of this invention will be readily apparent from the following detailed description of preferred embodiments, when considered in conjunction with the appended drawing in which:

FIG. 1 shows a cross rolling mill of the invention in a fragmentary side-elevational view, portions of the mill stand being broken away to reveal working elements of the motion transmitting train which moves the carrier;

FIG. 2 shows the mill of FIG. 1 in front-elevational fragmentary section; and

FIG. 3 shows a detail of a modified mill in a view corresponding to FIG. 1.

Referring now to the drawing in detail, and initially to FIGS. 1 and 2, there is shown as much of a cross rolling mill as is necessary for an understanding of this invention, the non-illustrated portions of the mill being understood to be conventional.

The mill stand 1 supports an upper roll 2 and a lower roll 6 which are rotated counterclockwise by a non- 3,318,132 Patented. May 9, 1967 illustrated drive mechanism when the mill operates, as is indicated by arrows. Ridges 5 on the two rolls extend over approximately one half of the working face of each roll and are of uniform radial height. They taper circum ferentially' in the direction of roll rotation, and are therefore wedge-shaped. The upper roll 1 is journaled in the mill stand for rotation about a fixed axis, whereas the lower roll 6 is journaled in two bearing blocks 7 which are slidably guided in the mill stand 1 for movement in the plane defined by the parallel axes of the two rolls. The position of the lower roll may be adjusted by threaded spindles 8 which are fastened to the bearing blocks 7 and carry nuts 9 for abutment against a face of the mill stand.

A carrier bar 3 is mounted on the mill stand 1 by means of two guide pins 10 which are fixedly fastened on the stand and engage respective bores in the bar 3. The pins are parallel to the direction of movement of the bearing blocks 7. A longitudinal slot of T-shaped cross section in the carrier bar 3 permits auxiliary devices to be mounted on the carrier, a guide sleeve 4 being shown in the drawing.

A motion transmitting train is interposed between each end of the carrier bar 3 and one of the bearing blocks 7. Each train includes a rod 13 which has eyes at both ends, one of the eyes being hingedly attached. to a fixed lug 12 on the mill stand 1, and the other eye providing a fulcrum for a one-armed lever 14.

The free end of the lever 14 is attached to a bearing block 7 by a pivot pin 15. The center of the lever is connected to the carrier bar 3 by a linkage of adjustable length. The linkage consists of two eye-bolts 11a, 11b having respective right-handed and left-handed threads, and a connecting sleeve 11 whose bore has a right-hand internal thread at one end and a left-hand internal thread at the other end. The eyes of the bolts are hingedly attached to the bar 3 and the lever 14 respectively.

When the mill is assembled, the position of the carrier bar 3 is adjusted by rotation of the sleeves 11 until the auxiliary device mounted on the bar is precisely centered between the faces of the rolls 2, 6. When the roll 6 is subsequently shifted toward or away from the roll 2 on its bearing blocks 7, the carrier bar 3 automatically moves over a distance which is one half of the distance moved by the roll 6. A separate adjustment operation for the auxiliary device mounted on the carrier bar is unnecessary.

The rolling mill partly illustrated in FIG. 3 differs from the apparatus described hereinabove only in details of the motion transmitting train which actuates movement of the carrier bar 3 in response to the movement of the movable roll 6. Two parallel racks 16, 16'

are respectively mounted on the mill stand 1 and on the bearing block 7 at each journal of the roll 6. The racks simultaneously mesh with a pinion 17 rotatably mounted on a threaded pin which engages the connecting sleeve 11. In all other respects, the device illustrated in FIG. 3 is as described hereinabove with reference to FIGS. 1 and 2, and it is operated in the same manner.

It should be understood, of course, that the foregoing disclosure relates only to preferred embodiments of the invention, and that it is intended to cover all changes and modifications of the examples of the invention herein chosen for the purpose of the disclosure which do not constitute departures from the spirit and scope of the invention set forth in the appended claims.

I claim:

1. In a rolling mill, in combination:

(a) a mill stand;

(b) two rolls mounted on said stand for rotation about axes extending in a common direction;

(c) adjusting means for moving one of said rolls relative to the other roll in a direction transverse of said common direction;

(d) a carrier;

(e) guide means on said stand and engaging said carrier for guiding movement of the same in said trans- I verse direction; and

(f) motion transmitting means interposed between said one roll and said carrier for moving said carrier a first distance in said transverse direction when said one roll moves a second distance in said transverse direction, said first distance being smaller than and a predetermined fraction of said second distance.

2. In a rolling mill as set forth in claim 1, said first distance being one half of said second distance.

3. In a rolling mill as set forth in claim 1, a circumferential ridge on each of said rolls, said ridge being wedge shaped and tapering axially in the direction of rotation of said roll.

4. In a rolling mill as set forth in claim 1, bearing lrneans movable on said stand in said transverse direction, said one roll being journaled in said bearing means, and said motion transmitting means engaging said bearing means.

5. In a rolling mill, in combination: a mill stand; two rolls mounted on said stand for rotation about axes extending in a common direction; adjusting means for moving one of said rolls relative to the other roll in a direction transverse of said common direction; a carrier; guide means on said stand and engaging said carrier for guiding movement of the same in said transverse direction; motion transmitting means interposed between said one roll and said car-rier for moving said carrier a first distance in said transverse direction when said one roll moves a second distance in said transverse direction, said first distance being a predetermined fraction of said second distance; and bearing means movable on said stand in said transverse direction, said one roll being journaled in said bearing means, and said motion transmitting means engaging said bearing means, said motion transmitting means including a lever member having three spaced portions, two of said portions being respectively hingedly connected to said stand and to said bearing means, and linking means including two spaced end portions respectively articulated to the third portion of said lever member and to said carrier.

6. In a rolling mill as set forth in claim 5, said linking means further including means for varying the spacing of said end portions thereof.

'7. In a rolling mill as set forth in claim 5, said linking means further including a connecting member formed 4 with a right-handed thread and a left-handed thread, said end portions having respective right-handed and lefthanded threads engaging the corresponding threads of said connecting member.

8. In a rolling mill as set forth in claim 4, said motion transmitting means including two racks respectively mounted on said bearing means and on said stand, a pinion simultaneously meshing with said racks, and linking means including two spaced end portions respectively secured to said pinion and to said carrier.

9. In a rolling mill as set forth in claim 8, said linking means further including means for varying the spacing of said end portions.

10. In a rolling mill, in combination:

(a) a mill stand;

(b) two rolls mounted on said stand for rotation about axes extending in a common direction;

(c) adjusting means for moving one of said rolls relative to the other roll in a direction transverse of said common direction;

((1) carrier means for holding an auxiliary device in a plane intermediate said axes;

(e) guide means on said stand and engaging said carrier means for guiding movement of the same in said transverse direction; and

(f) motion transmitting means interposed between said one roll and said carrier means for moving said carrier means a first distance in said transverse direction when said one roll moves a second distance in said transverse direction, said first distance being smaller than and a predetermined fraction of said second distance.

11. In a rolling mill as set forth in claim 10, said plane being equidistant from said rolls in said transverse direction.

References Cited by the Examiner UNITED STATES PATENTS 1,973,458 9/1934 Yoder 72--428 2,816,467 12/1957 Thoren 72250 2,962,917 12/1960 Drysdale 72-250 3,208,257 9/1965 Holub 72-108 FOREIGN PATENTS 608,410 1/ 1935 Germany.

CHARLES W. LANHAM, Primary Examiner.

H. D. HOINKES, Assistant Examiner.

Claims (1)

1. IN A ROLLING MILL, IN COMBINATION: (A) A MILL STAND; (B) TWO ROLLS MOUNTED ON SAID STAND FOR ROTATION ABOUT AXES EXTENDING IN A COMMON DIRECTION; (C) ADJUSTING MEANS FOR MOVING ONE OF SAID ROLLS RELATIVE TO THE OTHER ROLL IN A DIRECTION TRANSVERSE OF SAID COMMON DIRECTION; (D) A CARRIER: (E) GUIDE MEANS ON SAID STAND AND ENGAGING SAID CARRIER FOR GUIDING MOVEMENT OF THE SAME IN SAID TRANSVERSE DIRECTION; AND (F) MOTION TRANSMITTING MEANS INTERPOSED BETWEEN SAID ONE ROLL AND SAID CARRIER FOR MOVING SAID CARRIER A FIRST DISTANCE IN SAID TRANSVERSE DIRECTION WHEN SAID ONE ROLL MOVES A SECOND DISTANCE IN SAID TRANSVERSE DIRECTION, SAID FIRST DISTANCE BEING SMALLER THAN AND A PREDETERMINED FRACTION OF SAID SECOND DISTANCE.

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