US2274504A - Strip supporting roll for pickling vats and the like - Google Patents

Description

Feb. 24, 1942. P, J, SHEPHERD 2,274,504

STRIP SUPPORTING ROLL FOR PICKLING VATS AND THE LIKE Filed April 50, 1941- Y 4 PAUL JJSHEPHERD Patented Feb. 24,1942 f OFFICE s'mrr surroa'rme ROLL ron momma I VATS AND THE LIKE v Paul J. Shepherd, Lakewood, Ohio Application April 30, 1941, Serial No. 391,191

7 Claims.

This invention relates to an improved construction for strip supporting rolls for pickling vats and other uses where the rolls may be subjected ple, in galvanizing equipment.

Heretofore it has been common praeticeto construct corrosive resistant rolls for supporting, moving, and guiding metal strip in pickling, galvanizing and other equipment by first providing a roll of steel or iron and thereafter covering all the exposed surfaces of the roll, including portions of the roll necks, with a molded rubber covering or covering or other material immune to reaction with the acid or other reagent utilized in the particular process involved. Suitable provisions, as ballies or flippers, were provided to prevent the reagent from passing along the roll necks and onto the uncovered portions of the supporting shafts or into the bearings and in general, the arrangement was effective to a substantial extent in preventing rapid deterioration of the roll. However, the maintenance of equipment employing this arrangement is very expensive since the rolls must be removed from the equipment from time to time and transported to a rubber factory for the purpose of having a new covering applied thereto. Although the covering itself does not readily wear out during normal operation of theequipment, it does soon become out and broken by the sharp edges of the material passing over it and these cuts and breaks alto reactive or corrosive materials as, for examother corrosive material employed, which' is pro vided with an outer covering to prevent the marring or scratching of the sheets or strip, and in which the outer covering may be readily removed and replaced at lowcost without the necessity of forwarding the roll to otherplants for this purpose.

These and other objects and advantages of the invention will become apparent from a consideration of the following detailed specification and the accompanying drawing wherein there is speciflcall'y disclosed a preferred embodiment of the invention.

In the drawing,

Figure 1 is a side view of a pickling vat illustrating a representative use of the strip supporting and guiding roll of the invention;

Figure 2 is a longitudinal section through a roll constructed in accordance with the principles of the invention;

Figure 3 is a detailed view of the roll supporting shaft or neck and illustrating the preferred method of attaching the shaft or neck to the roll proper; and

Figure 4 is an end view of the roll of Figure 2. The roll construction, in its'preferred embodiment, consists principally of a body member Illlow the acid to seep through the covering and make contact with the metal underneath. When this condition is reached, the roll must be recovered as it is impossible to repair the damage and otherwise the roll would be severely attacked and soon rendered unusable.

It has also been proposed to construct strip supporting and guiding rolls which are subjected to corrosive materials of carbonaceous material having supporting shafts or necks ll attached. thereto in such manner that the body III, which is cylindrical, will rotate about its principal axis. In practice body member l0 may be produced by extruding a mixture of ground calcined coke and pitch after which the stock is cut to length and then baked to the proper hardness desired.

which is\ inert to the corrosive materials but provide an improved construction for ametal strip or sheet supporting and guiding roll subject to normally corrosive conditions of service which is operative to resist the action of the corrosive materials. present over long periods of service and which accomplishes its function without scratching or marring the finished surface of the sheet or strip. a

A more specific object of the invention is the provision of an improved construction for a metal sheet or strip supporting and guiding roll which is chemically inert to the pickling acid or Threaded bores [2 are machined in the ends of the roll to receive the roll supporting shafts or 'necks ll.

Necks II are each provided with an enlarged threaded inner portion I3 to-be screw threadedly received within the bores H of the roll I0 and are further provided with an imbedded steel or iron pin M which extends throughout the major portrons of the enlarged end l3 and the outer end I5. A bearing surface I6 is machined on the outer surface of the latter portion. The material employed for the necks ll may be substantially the same as that employed for the roll body: I0 and thenecks may be conveniently formed by a casting process.

Since there is a carbon to carbon contact between the threads on 13 and the threads in bores l2, there is a tendency of the threaded connection to loosen up in service. This is avoided'by drilling a number of substantially spaced holes I! in the ends of the body l0 and in the portions 13 of the necks 'H in such manner that the centers of the holes coincide with the threads in these members. As the necks H are tightly screwed into the bores l2, dowel pins H! are driven into the holes I! to securely lock the parts in assemblcd position. Pins l8 may likewise be formed of carbonaceous material.

"Covering the outer cylindrical surface of the roll I is a sleeve 20 which is preferably. of rubber or a rubber substitute and in practice the sleeve is made separately and thereafter applied to thelfinished roll it. Because of the uniform diameter of roll it, the sleeve 2|! may be readily slid onto the roll from end thereof and in applying the sleeve, a suitable cement may first be applied to the outer surface of the roll which cement will serve as a lubricant to assist the slippage of the sleeve over the roll and after the sleeve is properly positioned on the roll, will serve as a binder to secure'the sleeve to the roll.

It should now be apparent that.I. have pro-1 vided an improved construction for a strip guideach of said threaded bores, an axially extending reinforcing pin imbedded in each of said shafts,-a plurality of dowel pins received in bores extending along said screw threads to lock said shaftsagainst rotation relative to said body, and a separable rubber sleeve covering the outer cylindrical surface of said body member and cemented thereto.

2. A sheet or strip supporting and guiding roll for a pickling vat and the like comprising in combination a cylindrical body of carbonaceous material having a substantially uniform diameter throughout its length, threaded bores extending inwardly from either end of said body, a shaft formed of carbonaceous material having a cylindrical bearing surface and a spaced screw threaded portion screw threadedly received in each of said threaded bores, an axially extending reinforcing pin imbedded in each of said shafts, and a separable rubber sleeve of substantially uniform diameter covering the outer cylindrical surface of said body.

ing and supporting roll for use in a pickling vat and in other equipment where the roll may be subjected to acids and materials which attack metalswhich satisfactorily accomplishes the objects initially set out. On the roll itself, including supporting shafts or necks, all of the exposed surfaces are of carbon and, therefore, no part of the roll will besubject to attack by the corrosive materials. At the same time the objections to the use of carbon rolls are obviated by the use of the rubber covering 20. This covering pre ventsthe carbon of the roll fromscratching the highly finished surface of the strip or from imparting black streaks thereto, both of which are highly objectionable. By making the roll and sleeve of uniform cross-section, the latter may be economically produced as a separate article and readily applied to the 'roll either by the manufacturer of the roll or by the'user of the same. If in service the sleeve 20 does become cut or broken to a certain extent, no particular damage will be done since the material under the sleeve is chemically inert. Therefore, it is 3. A sheet or strip supporting and guiding roll for a pickling vat and the like comprising in combination a cylindrical'body of carbonaceous material having bores extending inwardly therein from either end thereof, a shaft havinga cylindrical bearing surface and a spaced portion received in each of said bores, means to secure said portions within said bores, and a separable rubber sleeve covering the outer cylindrical surface of said body member and cemented thereto.

4. A sheet or strip supporting and guiding roll for a pickling vat and the like comprising in combination a cylindrical body of carbonaceous material having bores therein extending inwardly from either end thereof, a shaft having a cy1in drical bearing surface and a spaced portion received in each of said bores, means to secure said portions in said bores, and a separable rubber sleeve covering the outer cylindrical surface of said body member.

5. Asheet or strip supporting and guiding roll for a pickling vat and the like comprising in combination a cylindrical body of substantially uniform diameter and a supporting shaft or neck extending outwardly from either end thereof, the

not necessary to replace the sleeve very often but when it does-wear down to such an extent that patches of carbon are exposed whereby, the strip may be damaged, the old sleeve may be readily cut off the roll by the user thereof and a new sleeve applied in the manner outlined above.

The above specifically described embodiment of the invention should be considered as mustrative only as obviously many changes may be made therein without departing from the spirit or scope of the invention. Reference should therefore be had to the appended claims in determining the scope of the invention.

What I claim is: 1. A sheet or strip supporting and guiding roll fora pickling vat and the like comprising in combination a cylindrical body of carbonaceous material having threaded bores extending inwardly from either end thereof, a shaft having a cylindrical bearing surface and a spaced screw threaded portion screw threadedly received in exposed surfaces of said body and said shafts or necks being formed of carbonaceous material, and

a separable rubber sleeve of substantially uniform diameter covering the outer" cylindrical surface of said body member.

6. A sheet or strip supporting and guiding roll 1 for a pickling vat and the like comprising in combination a cylindrical bodyof. substantially uniform diameter and formed of carbonaceous mate- 'rial, and a separable rubber sleeve of substantially uniform diameter covering the outer cylindrical surface of said body member and cemented thereto.

7. A sheet or strip supporting and guiding roll f for a pickling vat and the like comprising in 'combination a cylindrical body member having means to rotatably support the same about its principal axis, the outer surface of said body member being formed of carbonaceous material, and a separable rubber sleeve covering the outer cylindrical surface of said body member and cemented thereto.

PAULJ. SHEPHERD.

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