Патент USA US3043007код для вставки
July 10, 1962 B. e. BIRKIN 3,642,995 ROLLERS FOR PICKLING BATHS Filed Jan. 13, 1960 3 Sheets-Sheet 1 MN July 10, 1962 B. e. BIRKIN 3,042,995 ROLLERS FOR PICKLING BATHS Filed Jan. 13, 1960 3 Sheets-Sheet 2 -_ r. July 10, 1962 B. e. BIRKIN 3,042,995 ROLLERS FOR PICKLING BATHS Filed Jan. 13, 1960 5 Sheets-Sheet 3 3,942,995 Patented July 1%, 1962 2 FIGURE 3 is a view, similar to FIGURE 2, of a duck 3,942,995 Bernard George Birkin, Oldham, England, assignor to ing roller, RGLLERS FOR FICKLHQG BATES FIGURE 4 is a view, also similar to FIGURE 2, of a support roller, BTR Industries Limited, London, England, a company of Great Britain - FIGURE 5 is a section through a modi?ed form of Filed Jan. 13, 195i}, Ser. No. 2,220 Claims priority, application Great Britain Jan. 16, 1959 6 Claims. (Ci. 29—116) sleeve or roll which may be used in the ducking roller of FIGURE 3, and FIGURE 6 is. an elevation, partly broken away and in section, of an alternative form of support roller. The invention relates to rollers (herein called pickling 10 partly In the pickling plant illustrated in FIGURE 1 a steel rollers) for use in pickling baths to carry strip steel or strip 10 to be pickled is passed through a succession of other metal through a pickling acid or other corrosive pickling baths 11 containing hot sulphuric acid. The liquid. Such pickling rollers are commonly submerged, strip is taken over support rollers 12 and carry-over or partly submerged, in the liquid and the metal strip rollers passes downwardly from the top of the bath around the 15 the acid.13 and under ducking rollers 14 submerged in underside of the rollers and then upwardly to the top of The. construction of a carry-over roller is shown in the bath. When used in this way the rollers are some times called ducking rollers. Pickling rollers are some times also provided at the top of the bath for example, between successive baths, and the strip may pass over 20 these rollers on its way to and from the bath or baths or between successive baths. When used in this way the rollers are sometimes known as carry-over rollers. Pick ling rollers are also used to support the Wet strip at other positions. As such pickling rollers necessarily come into contact with the corrosive liquid it is important that they are constructed of, or coated with, a corrosion resistant ma FIGURE 2. The roller has a ?xed shaft 16 of steel with an adherent sheath 17 of ebonite over the whole of its surface except for the end spigots 16a which are heldin clamps outside the baths. Fitted over the centre portion of sheath 17 there is a renewable sheath, also of ebonite, formed of sections 18, each of L-section, The sections 18 are secured by nuts 19 acting through ebonite tubes 26 and rings 21. Around each sheath section 18, there is a sleeve or roll 23 also of ebonite, the outer periphery of these rolls con stituting the roller surface engaging the strip 10. The rolls 23 have internal grooves 25 in which run bearing terial. A material which is commonly preferred for this rollers 26 of ebonite. These rollers run on the sheath purpose is hard rubber (ebonite) ‘although other resistant 30 sections 18 in the grooves formed between the ?anges 28 materials such as some plastics or stainless steel, may be of adjacent sections. used. Furthermore the shaft or other supporting means for the rollers must also be resistant to corrosion. A common construction is to-have a ?xed shaft extending across the bath and to have a sleeve or roll, or several If after a period of service the rolls 23 or sections 18 become worn, they can be replaced without replacement of the shaft '16. The ducking roller shown in FIGURE 3 is of a con struction which is in general like that of the carry-over roller described above except that the rolls 23a are con structed of hollow annular mild steel cores 30 covered short sleeves or rolls ?tted over the shaft and rotatable thereon. The roll or rolls constitute the rotatable sup port for the strip. The shaft may be of steel with an ebonite covering and the sleeve or sleeves of ebonite. with ebonite. With such a construction, however, substantial local wear 40 The support roller shown in FIGURE 4 is also similar of the covering of the shaft occurs and in time the shaft in construction to the carry-over roller described above may be exposed to the acid and failure of the shaft occur. except that in this case sheath sections are held by split t is an object of this invention to provide an improved ebonite bushes 32 held in grooves 33 in the shaft. construction of pickling roller in which the rate of Wear in order to reduce wear on the periphery of the rolls is reduced. , 23, 23a, they may be provided with tyres 36 of softer, . According to the invention a pickling roller comprises wear and shock resistant rubber, as shown in FIGURE a shaft of, or coated with, a corrosion resistant material, 5. These tyres may be renewable. a roll or rolls also of, or coated with, corrosion resistant in cases Where the extra cost of renewable sheath sec material ?tted over the shaft, and rotatable thereon, and tions 18 is not justified, these may be omitted, as shown bearing rollers or balls of, or coated with, corrosion re in FIGURE 6, the bearing rollers 26 then running on sistant material between the roll or rolls and the shaft. the ?xed sheath 17. In the construction shown in In one form of the invention the shaft is of steel coated FIGURE 6 the rolls 23b are located in the axial direc with hard rubber, or plastic, and the roll or rolls and the tion by a step 37 on the sheath and ‘a ring 38 held to the bearing rollers may also be of hard rubber or plastic. sheath by ebonite set-screws 39. The bearing rollers may be retained in place within 55 the roll or rolls by end plates of ebonite or other hard rubber or plastic material and of annular form secured to the roll or rolls. These plates may also act as spacers The invention is not restricted to the details of the above examples but may be practiced within the scope of the claims. For instance, the bearing rollers may be replaced by hearing balls and either the rollers or the for the bearing rollers and in that case they may have, balls may be of steel covered with ebonite. Corrosion at intervals around the annuli, holes or sockets for ends resistant materials other than ebonite may be used. For on the bearing rollers of reduced diameter. Alternatively instance an equivalent hard plastic such as polytetra?uor the bearing rollers may be held in internal grooves with ethylene may be used or the shaft may be of stainless in the roll or rolls. steel. The bearing rollers or balls may be held in cages, Some speci?c examples of pickling rollers according to egg. of ebonite. The individual rolls employed in any of the invention, and their manner of use, will now be de 65 the above examples may be replaced by a single sleeve or roll. scribed with reference to the accompanying drawings, in I claim: which: 1. A pickling roller assembly for guiding traveling sheet FIGURE 1 is a diagrammatic illustration of a strip material Wetted with corrosive liquid, said pickling roller pickling plant, FIGURE 2 is a view partly in elevation and partly in 7 O assembly comprising a shafthaving an outer bearing surface of hard corrosion resistant material, roll means section of a carry-over roller, including hard corrosion resistant material disposed ' 1i ' 3,042,995 4; 3 around said shaft and freely rotatable thereabout, said able means on said shaft securing said removable second sheath thereto. roll means having a radially outer sheet-supporting sur face and having a radially inner bearing surface of hard 4. A pickling roller assembly as de?ned in claim 2 in which said sheath means comprises a removable sheath of hard rubber having a plurality of individual sections of L-shape in cross-section corresponding in number to the number of said rolls with each section disposed at a roll and having a hard rubber outer bearing surface con plastic corrosion resistant material, annular groove means in'one of said bearing surfaces, and bearing means in cluding rotatable bearing elements with outer surfaces of hard plastic corrosion-resistant material between said shaft and said roll means with said bearing elements dis posed in said annular groove means inrolling contact With said radially inner bearing surface of the roll means and with said ,outer bearing surface of the shaft to. permit full circle rotation of the roll means about said shaft under the turning forces exerted on the roll means by the traveling sheet material. tacting the said bearing elements disposed in said groove means of the roll, and detachable means on said shaft securing thereto said L-shaped sections arranged in end to-end abutting relation. < V , 5. A pickling roller assembly as 'de?ned'in claim 2 in a 2., A pickling roller assembly for guiding traveling ‘sheet material Wetted with corrosive liquid, said pickling . hard rubber contacting said bearing elements, and detach 15 roller assembly comprising a shaft‘having. sheath means of hard rubber providing an outer bearing surface, a plurality‘ of adjacent side-by-side rolls including hard which each of'said rolls consists of hard rubber through out the radial thickness of the roll wall and in which said groove means of each roll consists of a pair of axially spaced~apart annular grooves in said hard rubber radially inner bearing surface of the roll, and said bearing ele ments are roller bearing elements in said annular grooves. rubber disposed around said shaft and sheath means with 6. A pickling roller assembly as de?ned in claim 2 in each roll freely rotatable thereabout, each of said rolls which each of said rolls comprises a rigid hollow annulus having a radially outer sheet-supporting surface and hav of steel entirely enclosed within a shell of hard rubber ing a radially inner bearing surface ‘of said hard rubber and a tire of resilient wear-resistant rubber about the with annular groove means therein, and rotatable bear radially outer periphery of'said hard rubber shell pro— ing elements with outer surfaces ofhard rubber between 25 viding said sheet-supporting surface of‘ the roll, said shell said sheath means and each of said rolls and disposed providing said hard rubber radially inner bearing sur-' in said annular groove means of each roll in rolling con tact with said hard rubber bearing surface thereof and with said hard rubber bearing surface of the sheath means to permit full circle rotation of the rolls about 30 said shaft under the turning forces exerted on the rolls by thertraveling sheet material. 3. A pickling roller assembly as de?ned in claim 2 in which said sheath means comprises a ?rst sheath of hard rubber vadhesively united with the material of said shaft and having a substantially smooth cylindrical outer sur face, and a removable second sheath of hard rubber mounted telescopically upon said ?rst sheath in sliding ?t relation thereto with an outer bearing surface of said face of the roll with said annular groove means therein. References (lited in the ?le of this patent / UNITED STATES PATENTS 207,313 322,570 1,232,053 Smith _______________ __ Aug. 20; 1878 Wagner ______________ __ July 21, 1885 Lawrence _____________ __ July 3, 1917 2,650,603 ' Howes _______________ __ Sept. 1, 1953 OTHER REFERENCES ,“Nylon Parts for Ball Bearings,” Product Engineering. pp. 119-123. Div. 45 Feb. 1952.