US2155879A

US2155879A - Semiarticulated forming hood for up-type coilers

Info

Publication number: US2155879A
Application number: US160895A
Authority: US
Inventors: Donald H Washburn; Edwin B Hudson
Original assignee: American Rolling Mill Co
Current assignee: American Rolling Mill Co
Priority date: 1937-08-25
Filing date: 1937-08-25
Publication date: 1939-04-25
Anticipated expiration: 1956-04-25

Description

April 1939- D. H. WASHBURN E-i- VAL 2,155,879

SEMIARTICULATED FORMING 'HOOD FOR UP-TYPE COILERS Filed Aug. 25, 1937 INVENTORS.

Domua 1% W A-TTORN EYS.

' 4 Shets-Sheet 1 April 25, 1939.

H. WASHBURN ET AL ,155,879

SEMIARTICULATEDFORMING HOOD FOR UP-TYPE COIIJERS Filed Aug. 25, 1937 4 Sheets-Sheet 2 INVENTORS. ANflO/VALD H MSHBURN, EDW/N B. f/mso/v.

. ATfiO RNEY April 25, 1939. D. H. WASHBURN ET AL v 2,155,379

SEMIARTICULATED FORMING HOOD FOR [JP-TYPE COILERS Filed Aug. 25, 19s 4 Sheets-Sheet s INVENTORS. 501M440 H ASHBURN,

ATTORN EYS.

April 25, 1939. D H. WASHBURN El AL ,1

SEMIARTICULATED' FORMING HOOD FOR UP-TYPE COILERS Filed Aug. 25, 1957 4 Sheets-Sheet 4 R1 3 R1 2 R3 R,

.Fza. 5.

INVENTORS. Don/41.0 1f. MsHaue/v, inn 11v B.f/uaso-.

Patented Apr. 25, 1939 UNITED STATES PATENT. OFFICE SEMIARTICULATED FORMING HOOD FOR UP-TYPE COILERS ration of Ohio Application August 25,1937, Serial No. 160,895

6 Claims. (01. 2424s) This invention relates to hot strip coilers for coiling strip as itcome's from the hot strip rolling mill. More particularly; our invention relates toe coiler having a semi-articulated forming 5 hood for directing and guiding strip into coil form and forret aini'ng the coil as it is formed, and for ejecting the formed coil onto a conveyor.

It is an objectof our invention to provide a coiler of the type above mentioned which will be simple in its structure and inexpensive to build and maintain.

Since hot strip is delivered from the mills-.at high surface speed a coiler for this purpose must be automatic in operation so that the coil forml ing operation will start at theproper time. It is, therefore, a further object of our invention to provide an articulated coil forming device which is automatic in starting when the strip is ,first received into the machine to be coiled. It is a go still further object of our invention to provide a system of counterweights whereby the'coil itself starts the outward movement of the articu lated forming members, whereby all other timing means areeliminated.

These and other-objects of our invention which will be pointed out hereinafter or which will be apparent to one skilled inthe art upon reading these specifications, we accomplish by that certain method and by that construction and arrangement of parts of which we shall now describe an exemplary embodiment. made to the drawings forming a part hereof, and

in which:

Figure 1 is a vertical longitudinal section s through the machine.

Fig. 2 is a partial section similar to Fig. 1 through a part of the machine showing the coil as it is being formed.

Fig. 3 is a view similar to Fig. 2 showing the L0 manner in which the coil is ejected from the machine after it is wound.

Fig. 4 is an elevation of the pinch rolls showing the special formation which gives longitudinal stifl'ness to the strip.

,5 Fig. 5 is a cross sectional view of the apron plate taken on the line 55 of Fig. 1.

Briefly, in the practice of our invention, we provide specially formedpinch rolls which feed the strip over an apron plate into the coil form- 0 ing hood. These pinch rolls are shaped as will be described hereinafter, to impart longitudinal stiffness of the strip to prevent buckling. We

provide a series of coil forming members, certain of which are actuated by the coil as it grows,

6 and which through a linkage mechanism operate Reference is another coil forming member, so that as the coil grows, the coil forming members spread in a circular manner.

Referring to the drawings, the rolls 1 are the last rolls at the hot mill table which-delivers the strip from the hot mill to the coiler'. The strip M is carried upwardly over a plate 2 to

pinch rolls

3 and 4 which propel" the strip into the coil from a region included within the segments l5, l6 and I1, and the carrier rolls l2 and I3, and the apron plate 43. The strip is fed upwardly into this space between the rolls l2 and I3 and the coil as it is being formed rests upon the rolls l2 and I3, as may beseen in Fig. 2. The pinch rolls 8 and 4 are mounted in bearing blocks 5 suitably positioned in the housing window 6' of the side frames of the machine 6. An air cylinder 1 is provided for urging the lower pinch roll 4 against the upper pinch roll 3 through the linkage 8, 9 and I0. Since the lever arms 8 and 9 are both keyed to the shaft H which extends across the machine to the side' frames 6, it will be seen that as pressure is admitted to the upper partaof the cylinder 1, pressure is exerted on the roll 4. The

pinch rolls

3 and 4 are'suitably driven-in any desired manner as are the rolls I 2 and H. The drive for these rolls is conventional and is therefore not illustrated. It may be noted that it is preferable to drive the rolls I 2 and ill at a slightly higher surface speed than the

pinch rolls

3 and 4.

When coiling narrow strip of the thinner gauges there is danger of a cobble between the

pinch rolls

3 and 4 and the back carrier roll H, on account of the fact that the strip M is thrust into the circular path for forming the coil bymeans of ro1ls3 and 4. This danger arises on account of the structural weakness of the strip at coiling temperatures. In order to increase the structural strength to eliminate cobbling, we make the roll 3 convex and the roll 4 concave, as may clearly be seen in Fig, 4, thereby producing a concavo-convex strip in cross section whereby greater strength is imparted to the strip to enable it to resist the propulsion force imparted to it by the

pinch rolls

3 and 4. In order toreduce the possible-damage to the surface of the strip at points along the pinch roll surface. where the surface speeds do not coincide, the clearance between the pinch rolls is increased toward their ends. It is desirable that actual contact between the pinch rolls be made 'within the region of the middle fourth -to the middle third of the roll length. In the drawings, R1 reptact zone.

resents the radius of curvature of the roll 4 throughout its length. R: (less average strip thickness) represents the radius of the roll 3 with in the region of the middle fourth to the middle third of the roll length. R3 represents the radius of the roll 3 beyond the limits of the middle con- The apron plate 43 is also provided with a transverse curvature with a radius equal to R1 as shown in Fig. 5.

The coil forming segments are indicated at I5, I6, and II. The segments I6 and I! are hinged together at 29 and are supported by two arms I8 and 28 while the segment I5 is entirely independent of the segments I6 and I1 and is keyed to the transverse shaft 25. The arm l8 which is one of the arms supporting the articulated segments I5 and I1 is keyed to the transverse shaft 59 and serves to actuate other parts of the mechanism, as will presently be described, while the arm 28 is pivoted about the fixed point 30. It will thus be seen that the arm 28 fixes the movement .of the end of the segment I1 in a circular path about the fixed point 30.

Also keyed to the shaft 58 is a gear segment I3 which is thus actuated by movement of the arm.

I8. This segment meshes with the gears and 2I. The gear 2| is keyed on the shaft which also carries keyed to it the cam 22, which is adapted to actuate the cam follower 36, which is mounted upon the segment I5. The segments I6 and I! are counterweighted by the weight 3| through the linkage 32, 33 and 34, the member 34 being pivoted to the gear segment I9. The segment I5 is connected to an air cylinder 23 by means of a lever 24 keyed on the shaft 25- by the gear 2I and the cam 22 are moved in a.

clockwise direction. As the cam 22 turns in a clockwise direction the follower moves to the left because of the air pressure in the cylinder 23 and thus the segment I5 also moves upwardly.

In order to reduce friction of the coil against the forming devices, we provide a roller 29a at the point where the segments I6 and II are hinged together and also a roller I5a at the end of the segment I5. Furthermore, we provide for high pressure water between the segment I5 and the strip I4 by means of the nozzle 42. In order to eject the coilafter it has been formed, the segments I6 and I! are raised to clear the coil 31 by the admission of high pressure air to the lower end of the cylinder 21. The piston rod of the cylinder 21 carries the rack 26 which meshes with the gear 26, described above. Thus as the rack 26 moves upwardly the gear 20 is rotated in a clockwise direction and the gear segment I9 is rotated in acounterclockwise direction, whereby the segments I6 and II are raised. At this point high pressure air is admitted to the right hand end' of the cylinder 23 which rotates the segment I5 in a clockwise direction causing the roller I5a to eject the coil toward the right. After the coil has been ejected the segments I6 and H are returned to their initial position by admitting air to the upper end of the cylinder 21 which i \lowers the rack 26, and through the above deheld in position against the cam by constant low air pressure on the left hand end of the cylinder 23 and that the ejecting movement of the seg-.

ment I5 is obtained by the admission of high pressure air to the right hand end of the cylinder 23 except during the ejection of the coil when the right hand end of the cylinder 23 is open to the atmosphere. The segments I6 and I I are operated by the growing coil except during ejection when they are operated by the admission of air to the lower end of the cylinder 21, to raise the segments to clear the coil, and by the admission of air to the upper end of the cylinder 21 to lower them to their initial position.

. When the segments I5, I6 and I! are in their initial position both ends of the cylinder 21 and the right hand end of the cylinder 23 are open to the atmosphere. In practice the operations of-these cylinders may be conducted from a control station by means of push buttons operating electric valves in any well known manner, and the cylinder 21, for example, may be operable by means of a limit switch to raise the segments I6 and I! when the coil is completed. It should be noted that during coil growth the coil itself is the sole means for actuating the segments I5. I6 and I1, and the coil is thus fully guided and kept in contact with the carrying rolls at all times, and consequently the finished coil is perfectly round and tightly wound.

It is to be understood that modifications may,

' pivotally mounted in said frame, other guide segments articulated together, a shaft, an arm on said shaft supporting said articulated guide segments, a gear segment mounted on said shaft, a cam positioned to be actuated by said gear segment, and a follower for said cam on said first mentioned segment, whereby as the coil grows and pushes said articulated segments outwardly, said first mentioned segment is also moved outwardly.

2. In a hot ooiler, a frame, a guide segment pivotallymounted in said frame, other guide segments articulated together, a shaft, an arm on said shaft supporting said articulated guide segments, a gear segment mounted on said shaft, a cam positioned to be actuated by said gear segment, a follower for said cam on said first mentioned guidesegment, and means for continuously urging said first mentioned guide segment and'follower against said cam, whereby as the coil grows and pushes said articulated segments outwardly, said first mentioned segment is also moved outwardly.

3. In a hot ooiler, a frame, a guide segment pivotally mounted in said frame, other guide segments articulated together, a shaft, an arm aisaaro on said shaft supporting said articulated guide segments, counterweight means for said articulated segments, a gear segment mounted on said shaft, a cam positioned to be actuated by said gear segment, a follower for .said cam on said first mentioned guide segment, and means for continuously urging said first mentioned guide segment and follower against said cam, whereby as the coil grows and pushes said articulated segments outwardly, said first mentioned segment is also moved outwardly.

4. In a hot coiler, a,frame, a guide segmentpivotally mounted in said frame, other guide segments articulated together, a shaft, an arm on said shaft supporting said articulated guide segments, counterweight means for said articulated segments, a gear segment mounted on said shaft, 9. cam'positioned to be actuated by said gear segment, a follower,' for said cam. on said first mentioned guide segment, means'to confine the.

free end of said articulated segments to a circular path, and means for continuously urging said first mentioned guide segment and follower against said cam, whereby as the coil grows and pushes said articulated segments outwardly, said first mentioned segment is also moved outwardly, and whereby said segments retain substantially their true circular relationship during coil r wth. I

5. In a hot coiler according to claim 1, separate means for. rotating said gear segment in either direction. to raise said articulated segments clear of the coil for ejection thereof, and to lower said articulated segments to their initial position for a successive coiling'operation.

6. A hot coiler according to claim 2, in which the means for urging said first mentioned guide segment against said cam comprises a, double acting. pressure cylinder, one side thereof being under low pressure during the coiling operation, and means for applying high pressure to the other side thereof. to rock said first mentioned segment in a reverse direction for ejecting the formed coil.

DONALD E. WASHBURN. EDWIN B. HUDSON.