US2977927A

US2977927A - Roll cleaning device

Info

Publication number: US2977927A
Application number: US721850A
Authority: US
Inventors: Ralph G Mehler; William D Hendron
Original assignee: Inland Steel Co
Current assignee: Inland Steel Co
Priority date: 1958-03-17
Filing date: 1958-03-17
Publication date: 1961-04-04
Anticipated expiration: 1978-04-04
Also published as: GB916167A

Description

April 1961 R. e MEHLER ET AL 2,977,927

ROLL CLEANING DEVICE Fil ed March 17, 1958 2 Sheets-Sheet 1 INVENTORQ R. G MEHLER ETAL ROLL CLEANING DEVICE April 4, 1961 2,977,927

Filed March 17, 1958 2 SheetsSheet 2 -44 a F ?6 a| 0 /55 All &

INVENTORfi ZaZp/z G We/ZZQI,

United States Patentfn' ROLL CLEANING Filed Mar. 17,.1958,,:S.er..No. 721,850

7 Claims] cl. 113-203) This invention pertains to coating rolls and in particular to an improved apparatus for cleaning and preventing a'build-up of coating material on the rolls.

In a continuous coating process such as galvanizing, the galvanizing metal, namely, zinc, tends to build up on the coating rolls. This build-up, if not removed, will destroy the roll contour by adding to the diameter of the roll up to several thousandths of an inch, since it does not generally'occur uniformly across the roll face. Therefore, the opening along the junction of the rolls varies causing variations in the amount of Zinc applied to the metal being galvanized. -The build-up may also cause distortion of the strip being galvanized due to the variation in the opening along the junction of the rolls. The existing methods of removing this build-up are extremely crude and inadequate. The practice today is forjthe operator to judge from a visual observation of' the coated strip where he thinks the build-up is ex cessive. He then proceeds to cut away the build-up with a long handled hardened metal scraper. This method of removal requires considerable skill, particularly since the operator is trying to remove the zinc coating of only a few thousandths of an inch based on a visual observation. The dilficulty of this method is further magnifled by the fact that the operator must stand'several feet away from the rolls while'he is trying to remove the aforementioned build-up. If the operator should misjudge the amount of the build-up, he is very likely to gouge the surface of the roll which would necessitate the replacement of the roll .at a considerable expense. The present methods are only partially effective andgas a result a need is presented for means that will accurately and dependably control the thickness of the coating material on the roll. Therefore, it isan object of this invention to provide an automatic means for maintaining a thin uniform layer of coating material on coating rolls. A further object of the invention'is to provide an automatic roll dressing means that may be adjusted to accommodate rolls of various diameters.

A still further object of the invention is to provide an automatic roll dressing means for maintaining the concentricity of the rolls during the galvanizing process.

A still further object of the invention is to provide an automatic apparatus, that is especially adapted, for maintaining the proper thickness of the galvanizing material on the rolls during the continuous galvanizing process.

A still further object of the invention is to provide an automatic roll dressing means that may be usedjin conjunction with known machines in the continuous galvanizing process.

These objects and still others will be apparent upon reading of the specification with reference to the following drawings.

I111 the drawings:

Figure 1' is a front elevational view of the roll cleaning device embodying the invention.

Pa-tented Apr. 4,1961

Figure 2 is an end view in elevation taken along the lines 2-2 in Figure l.

Figure 3 is a 'cross sectioned segmental view of th device as shown in Figure 1;

Figure 4 is a cross-sectional view taken along the lines 44inFigure 1.'

Figure 5 is across-sectional view taken along the lines 5-'-5 in Figure '1. g a Figure 6 is a cross-sectional view taken along the lines 6--'6 inFigure '2. V

Although the invention-will be described'as used in conjunction with a galvanizing process, it is to be understood that this is merely an example and that the invention may be used in conjunction with other types of processes. I 6

Referring now to the drawings, there is shown a pair of rolls '10 suitable for continuous galvanizing, either or'botho'f which may apply a galvanizing material to a metal platepas'sed therebetween, in a conventional manner. These rolls are mounted on the stub shafts '12, which are journaled in the vertical support members 14 at the ends of the rolls 10. The support members '14 are joined together at their upper ends by the cross members'16. It is to be understood that the rolls as described herein are merely illustrative of the various galvanizing apparatus, and are in no way to be construed as a limitation to the practice of the invention.

As shown in'the drawings, a roll cleaning device generally denoted by the numeral 17 is used with each of the rolls 10. Since the roll cleaning devices used with each of the rolls are identical, the, description hereinafter will be applicable to both. The roll cleaning device includes a translating screw 18 which extends between the support members 14 with its ends rotatably journaled therein. A second support member 22 is journaled at each end of the roll 10 on the stub shafts 12 and extends upwardly therefrom with the translating screw being journaled therethrough. Each support member 22 is comprised of two parts, 24, 26, which co-operate to form a bifurcated yoke, as best shown in Figure 2. Mounted on the inside of each portion of the yoke are the bearing blocks 28 which ride on the stub shaft 12 of the rolls 10. The two

levers

24 and 26 are pivotally connected by the pivot member 30 so that the yoke can be adjusted to accommodate shafts of various diameters. The lever 24 at its upper'end is provided with a clamp portion 32 which receives the upper end 34 of the lever 26. The end 34 extends through the right hand portion of the end 32 in the manner shown in Figure 2. The end 34 is biased by a spring 36 towards the right so that the shaft engaging portion of the lever 26 is brought into contact with the stub shaft 12. In this manner a yoke is provided which automatically adjusts to different sized stub shafts.

In Figure 3 there is shown a preferred method for mounting the ends of the translating screw 18 in the

support members

14 and 22. The translating screw 18 is provided with a threaded portion 38 and a smooth portion 40, which are separated by a collar 42. The smooth portion 40 extends through the

supports

14 and 22 and is journaled therein by the bearing

members

44, 46, and 48. Each of the bearing

members

44, 46, and 48,, is provided with a collar 50 which aidsin the posi tioning of the bearing with respect to the shaft and related support member. A further section 52 extends from the end of the translating screw 18 for mounting the drive pulleys 54. These drive pulleys are driven by a belt 56'from the motor 58, shown in Figure 1.

In Figure 1 there isshown one view of the carriage assembly, generally denoted by the numeral 60, used in the, construction of theroll cleaning device. The carriage assembly 60 rides on the pair of track members 62, which are laterally spaced from the translating screw 18 and are supported at their ends by the support mem bers 22. The track members 62 have a six-sided crosssection with a pair of the apexes aligned in a substantially vertical position, as best shown in Figure 2. p j

The carriage assembly 60 includesa body 64, in which are mounted eight wheels 66, four on each side, as shown in the drawings. The wheels 66 are adapted to ride on the track members 62, with two of the wheels on the top side of each track member and two of the wheels on the bottom side of each track member. The wheels 66 are provided with a tapered groove 67 which is complementary with the apexes of the track members 62 on which they ride. provide the stability necessary in the operation of the roll cleaning device described herein, although other constructions may be suitable.

The body 64 of the carriage assembly 60 is provided with a bore 68 adapted to receive the threaded portion 38 of the translating screw 18. The bore 68 is internally threaded complementary to the threads of the translating screw 18 so that as the translating screw 18 is rotated, the carriage assembly moves along the track members 62 parallel to the center line of the associated roll 10. Adjacent the ends of the track members, mounted on the support members 22, a limit switch 59 is provided which is electrically connected to the motor 58. The limit switches are adapted, when contacted by the carriage assembly 60, to reverse the direction of rotation of the motor, and consequently reverse the direction of rotation of the translating screw. In this manner it is possible to continuously reciprocate the carriage 60 back and forth along the track members 62. Secured to the lower side of the carriage assembly 60 is a downwardly extending arm having a dog-legged curvature, as best shown in Figures 1 and 2. The arm 69 is adapted to clear the periphery of the roll 10 so that its lower end is spaced therefrom. At the lower end of the arm 69 a cutting implement 70 is mounted which is slightly spaced from the surface of the roll 10 when the cleaning device is in operation as will be seen later on.

The arm 69 is so attached to the carriage assembly 60 that it may be positioned relative to the support 22 so that the cleaning device can accommodate various sized rolls. An example is shown in Figure 2 by the dotted lines in which the arm 69 and the cutting tool 70 have been positioned so that the cleaning device accommodates a smaller roll than is indicated by the solid lines.

The arm 69 is constructed of two

parts

72 and 74 which are locked together by the bolt 76 and the complementary dovetail structure 77 shown in Figure 6. The part 74 of the arm 69 is provided with the shoulders 78 and the ridge 80 which has the threaded bore 81. As shown in the drawings, the part 74 is received in the recess 82 in the carriage body 64.

A plate 84 is secured to the forward face of the body 64 of the carriage assembly 60 by the bolts 86 and extends across one end of the recess 82. The plate 84 is provided with a bore 88 which is aligned with the bore 81 in the member 74. A threaded member 90 extends through the

bores

81 and 88 and is held at its other end by the boss 92 on the carriage body 64 and bolt 94. The member 74 and in turn the arm 69 may be positioned within the carriage body 64 by rotating the threaded member 90 so that the member 74 is moved either to the right or left by means of the co-operating threads on the threaded member 90 and the bore 81. After the member 74 has been adjusted to its desired position, it may then be locked in place by the wedge members 98 which are slidably received between the shoulders 78 and the carriage body 64 as best shown in Figures and 6. The wedge members 98 are jammed into locking position by means of the bolts 100, whichextend through the wedge members and into the carriage body 64.

It can now be seen that the invention as described pro- This arrangement has been found to vides an automatic and accurate means for maintaining the proper thickness of coating on rolls used in a continuous galvanizing process. It is now apparent that the arm 69 may be adjusted with respect to the supports 22 in order to accommodate various sized rolls. The arm 69 and the cutting tool 70 are positioned so that as the cutting tool crosses the face of the roll, it leaves a thin coating of the galvanizing material on the roll. Thus, any excess of material built up on the roll will be removed by the cutting tool 70 so as to provide a thin, even coat along the entire surface of the roll.

Another advantage of the subject invention is the simplicity in construction and adaptability to be used with Zarious size and type commercial galvanizing roll assemlies.

Although a preferred embodiment of the invention has been used in the description of the invention, it is contemplated that this is merely by way of example and is not to be construed in any manner as a limitation. It is apparent that certain modifications may be made within the scope of the claims without departing from the spirit of the invention.

We claim:

1. A coating roll cleaning device in combination with a coating roll mounted on shaft means journaled between two frame members comprising a vertically standing support member journaled at each end of said coating roll on said shaft means, a translating means adapted to be rotatably driven extending between said support members and rotatably journaled therein, track means extending substantially the full length between said support members, a carriage assembly adapted to ride on said track means and operatively associated with said translating means, an arm depending from said carriage in the direction of said roll, and a cutting implement having a width that is a fraction of the length of said roll, mounted on said arm in closely associated relationship with the periphery of said coating roll.

2. A coating roll cleaning device adapted to be used with a coating roll mounted on shaft means journaled between two frame members comprising, a vertically standing support member journaled at each end of said coating roll along said shaft means, a translating member adapted to be rotatably driven extending between said support members and rotatably journaled therein, track members substantially parallel with said translating member extending substantially the full length between said support members, a carriage member riding on said track members and operatively associated with said translating member so as to move in a direction substantially parallel with said translating means, an arm depending downwardly from said carriage, and an inwardly extending cutting implement having a width that is a fraction of the length of said roll, mounted on said arm in closely spaced relationship with the periphery of said coating roll.

3. A coating roll cleaning device adapted to be used with a coating roll mounted on shaft means comprising a vertically standing support member journaled at each end of said coating roll on said shaft means, a translating means adapted to berotatably driven extending between said support members and rotatably journaled therein, track means extending between said support members, a carriage assembly riding on said track means and operatively associated with said translating means so as to move in a direction substantially parallel with said translating means, an arm depending downwardly from said carriage assembly, a cutting implement mounted on said arm in closely spaced relationship with the periphery of said coating roll, and means for rotating said translating means so that said carriage assembly and said arm are reciprocated along substantially the full length of the longitudinal axis of the coating roll.

4. A coating roll cleaning device adapted to be used with a coating roll mounted on shaft means comprising a vertically standing support member journaled at each end of said coating roll on said shaft means, a translating means adapted to be rotatably driven extending between said support members and rotatably journaled therein, track means extending between said support members, a carriage assembly riding on said track means and operatively associated with said translating means so as to move in a direction substantially parallel with said translating means, an arm extending downwardly from said carriage assembly, a cutting implement mounted on said arm in closely spaced relationship with the periphery of the coating roll, means for rotating said translating means so as to reciprocate said carriage assembly and said arm along substantially the full length of'the longitudinal axis of the coating roll, and means for 'adjusting said arm relative to said carriage assembly so as to adapt said roll cleaning device to various size rolls.

5. A roll cleaning device adapted to be used with a coating roll comprising a vertically standing support member journaled at each end of said coating roll on said shaft means, a translating means adapted to be rotatably driven extending between said support members and 'rotatably journaled therein, track means extending between said support members, a carriage assembly riding on said track means and operatively associated with said translating means so as to move in a direction substantially parallel with said translating means, an arm depending downwardly from said carriage assembly, a cutting implement mounted on the lower end of said arm in closely spaced relationship with the periphery of said coating roll, means for rotating said translating means so as to reciprocate said carriage assembly and said arm along substantially the full length of the longitudinal axis of the roll, and means for adjusting the position of said arm relative to said vertically standing support members so as to place said cutting implement in closely spaced relationship with the periphery of the coating roll.

6. A coating roll cleaning device adapted to be used with a coating roll comprising, a support member at each end of the coating roll substantially fixed with respect to the longitudinal axis of the coating roll, a threaded translating means adapted to be rotatably driven extending between said support members and rotatably journaled therein, track means extending substantially the full length between said support members, a carriage assembly adapted to ride on said track means and operatively associated with said threaded translating means so as to move in a direction substantially parallel with said translating means, an arm depending from said carriage assembly in the direction of the roll, and a cutting implement having a width that is a fraction of the length of said roll, mounted on said arm and normal-1y positioned in closely spaced relationship with the periphery of the coating roll. 7. A coating roll cleaning device adapted to be used with a coating roll comprising, a translating means extending along substantially the full length of the longitudinal axis of the coating roll and vertically supported therefrom, a carriage assembly adapted to ride on said translating means in a direction substantially parallel therewith, an arm depending from said carriage assembly in the direction of the roll, and a cutting implement hav ing a width that is a fraction of the length of said roll, mounted on said arm and normally positioned in closely spaced relationship with the periphery of the coating roll.

References Cited in the file of this patent UNITED STATES PATENTS 129,238 Krom July 16, 1872 759,644 Sturtevant May 10, 1904 2,058,369 Taylor Oct. 20, 1936 2,294,520 Staude Sept. 1, 1942 2,318,504 Lodding May 4, 1943 2,357,963 Mclntire Sept. 12, 1944 FOREIGN PATENTS 1,112 Great Britain 1869