US2532563A

US2532563A - Strip guiding apparatus

Info

Publication number: US2532563A
Application number: US631016A
Authority: US
Inventors: Glenn R Markle
Original assignee: Carnegie Illinois Steel Corp
Current assignee: Carnegie Illinois Steel Corp
Priority date: 1945-11-27
Filing date: 1945-11-27
Publication date: 1950-12-05
Anticipated expiration: 1967-12-05

Description

Dec. 5, 1950 G. R. MARKLE 2,532,563

STRIP GUIDING APPARATUS Filed Nov. 27, 1945 4 Sheets-Sheet l FIE -i Dec. 5, 1950 G. R. MARKLE STRIP GUIDING APPARATUS Filed NOV. 27, 1945 4 Sheets-Sheet 2 FIG. 2-

CiZf/Y/V E. M744 Dec. 5, 1950 G. R. MARKLE STRIP cuxnmc. APPARATUS 4 Sheets-Sheet 3 Filed Nov. 27, 1945 which are attached to the brackets 4.

Patented Dec. 5, 1950 STRIP GUIDING APPARATUS Glenn It. Markle, Pittsburgh, Pa., assignor to Carnegie-Illinois Steel Corporation, a corporation 1 of New Jersey Application November 27. 1945, Serial No. 631,016

- 3 Claims. '(01. 271- 21) This invention relates to strip guiding apparatus and more particularly to such apparatus for guiding strip through tensioning devices used with strip processing equipment such as rolling mills. Conventional apparatus for guiding strip material through a two roll tensioning device consists of a framework of flat steel bars formed in a manner to roughly parallel the circumference of the tension rolls. Thesebars are welded at right angles to support angles which are in turn rigidly bolted to the tension roll housings. One set of these guide bars is positioned about the top tension roll and a second set is positioned around the bottom tension roll. Suflicient clearance is provided to permit passage of the strip between the guides and the tension rolls in order to prevent marring the surface of the strip. This type of guide has not proved satisfactory since, when a cobble occurs in the tensioning device as a result of the strip breaking or for any other cause, the strip piles up between the tension roll and the guide mechanism and becomes tightly wedged therebetween. The wedged strip is very difllcult to remove and it is necessary to unbolt the guide mechanism from the housing and remove it before the scrap can be removed. This damages the guide and causes a considerable loss in operating time.

An object of the present invention is to provide a guide which is mounted to facilitate removal of cobbles from a tensioning device.

This and other objects will be more apparent after referring to the following specification and attached drawings, in which:

Figure l is a top plan view of the tension rolls and guide on the entry side of the mill; I

Figure 2 is a sectional view taken on the line 1I--II of Figure 1;

, Figure 3 is a top plan view of the tension rolls and guide on the exit side of the mill;

Figure 4 is a view taken on the line IV--IV of Figure 3; and

Figure 5 is a view taken on the line V-V of Figure 4.

Referring more particularly to the drawings, reference numeral 2 indicates the housing of a rolling mill having brackets 4 attached thereto. Mounted in the brackets 4 are the rolls 8 and 8 or a roll tensioning device. A guide III is pivotally suspended from a pair of opposed bolts l2 The guide l0 consists of a framework of flat steel bars I4 which are bent in a manner to roughly parallel the circumference of tension roll 8 throughout a substantial part of the distance that the strip S is in contact therewith. The bars i4 are welded to angles It. A flat bar I 8, arran ed at right angles to the bars I4, is welded to each end of the angles. The bars it are provided with holes for receiving the bolts 12. A hard fiber striker'bar 20 is bolted to the lower angle I 6. The bolts I! are located so that the guide HI will normally swing into position around the roll 6. The strip 5 passes around the lower roll 8, between the rolls 8 and 8, around approximately half of the upper roll 8 and thence to the mill. In case of a cobble,

- the strip S will raise the guide Ill and when it is desired to .remove the cobble the guide It can be rotated to the dotted line position. A similar guide may be provided for the lower roll 8 and the guides may also be used on the delivery side of the mill. To facilitate guiding the strip around the roll 8, a spring pressed guide roll (not shown) is ordinarily provided to bear against the roll 8 at about the point that the strip first contacts it.

Figures 3, 4 and 5 disclose a second embodiment of my invention in which the guide is shown in conjunction with the tension rolls on the delivery side of the mill. In this embodiment the strip 8 passes from the rolls 22 of the rolling mill around the top tension roll 24, between the top tension roll 24 and the bottom tension roll 26, to the guide plate 28 and thence to a seller (not shown).

A guide 30 which is shown as a plate bent to a radius slightly greater than that of the tension roll 26 is mounted adjacent the bottom roll 26 and is spaced from the roll a suflicient distance to provide clearance for the strip S. A hard fiber striking bar 32, which bears lightly on the top tension roll 24, is bolted to one extremity of the plate 30. The guide 30 is welded or otherwise fastened to an angle iron 34 which has a steel bar 38 welded thereto for slidably supporting a counterweight 38. The counterweight is provided with a tapped hole 40 and is held in adjusted position on the bar 38 by means of a cap screw 42 threaded into the hole 40. In order to strengthen the structure, reinforcing plates 44 are welded between the guide 30 and bar 36. An angle 46 is bolted or otherwise fastened to each end of the supporting angle 34. Welded to the angle 46 is a plate 48 which extends upwardly therefrom to a boss 50 welded to the housing 52. The plate 4| is provided with a hole at its upper end through which passes a bolt 54 threaded into boss 5.. As best shown in Figure 3, a bent bar 56 is welded to the plate 48 adjacent its lower end and a nut Ill is welded to that leg which extends toward the housing 52. A bolt provided with a lock nut 2 is threaded through nut 58 and extends through assases the plate 59 to contact a stop angle 94 which is iastened to the housing 52. The pivot bolts II are so located that the guide 30' will normally swing into position around the roll as shown. By adjusting the position oi bolt 60 the iorward swing of the guide assembly is regulated to provide the,

desired clearance between guide 38 and tension roll 29. The force with which the guide swings inwardly toward the roll 28 may be varied by changing the position or counterweight 38 on the 4 to provide clearance ior the strip, a pivot support ior said guide at each end thereof outside the path oi travel oi said strip, said pivot supports bar 36. This type of guiding device, like that without departing from the scope oi the following claims.

I claim:

1. Apparatus for guiding strip through a two roll tensioning device around each of which rolls the strip is wrapped over a substantial are comprising a bent guide surrounding one of the rolls throughout a substantial part of the distance that the strip is in contact therewith, said guide being spaced from said last named roll a sumcient distance to provide clearance for the strip,

a pivot support for said guide at each end thereof outside the path oi travel of said strip, said pivot supports being above the top of the last named roll, a member attached to said guide for movement therewith about the pivot supports and extending away from said rolls, and a counterweight mounted on said member, said pivot supports being located so that the guide willll normally swing into position around the ro 2. Apparatus for guiding strip through a two roll tensioning device mounted in a housing and around each of which rolls the strip is wrapped over a substantial arc comprising a bent guide surrounding one of the rolls throughout a substantial part of the distance that the strip is in contact therewith, said guide being spaced from said last named roll a sufilcient distance being above the top oi the last named roll, said pivot supports being located so that the guide will normally swing into position around the roll, a stop mounted on said housing outside the path oi travel oi said strip, a bracket attached to and, extending irom said bent guide toward said stop, and a bolt adiustably mounted in said bracket with one end thereof bearing against said stop to limit the inward movement oi said guide.

3. Apparatus ior guiding strip through a two I roll tensioning device around each oi which rolls the strip is wrapped over a substantial are comprising a bent guide surrounding one oi the rolls throughout a substantial part oi the distance that the strip is in contact therewith, said guide be ing spaced from said last named roll a suflicient distance to provide clearance for the strip, a pivot support for said guide at each end thereof outside the path oi travel 01. said strip, said pivot supports being above the top of the last namedroll, a member attached to said guide for movement therewith about the pivot supports and extending away irom said rolls, a counterweight mounted on said member, said pivot supports being located so that the guide will normally swing into position around the roll, and adjustable means for limiting the inward movement of said guide.

GLENN R. MARKLE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Ross Aug. 16, 193B