US2710778A - Bearing chocks for rolling mills - Google Patents

Description

June 14, 1955 MILLER BEARING CHOCKS FOR ROLLING MILLS 5 SheetsSheet 1 Filed June 13, 1952 MN- NM. x i Q U. Q

||||||| lril Q Ill? N w\\ 1 m w. fli Q 1 IT! E 1, I m Q mm Mm fi m 1 N\ Q \M Q %N\\|\1 m Q Q N m=h 1720676607! Lou/5 A. M/LLEE, ymmdmy 42% L- L. MILLER June 14, 1955 Filed June 13, 1952 7 llllllllllll 17 mm 2 7 I w Q I e M 1 M r L l I 3g a Ew United States Patct BEARING CHGCKS FUR ROLLING MHJLS Louis L. Miller, Cleveland, Ohio, assignor to United States Steel Corporation, a corporation of New .Ferscy Application June 13, 1952-, Serial No. 293,280

2 Claims. ((Ii. 393-4 6) This invention relates to rolling mill bearing chocks, and particularly to improved means for mounting nonmetallic bearing shoes therein and circulating cooling liquid.

An object of the invention is to provide improved mounting means which eliminate the need for clips or other special fasteners.

A further object is to provide improved mounting and liquid circulating means which allows easy entry of the liquid on either side of the bearing shoe through relatively large passages that do not clog.

A more specific object is to provide a mounting means in which slots in the chock carry the nonmetallic bearing shoe and the chock contains open chambers exposed directly to the back and side faces of this shoe and adapted to supply liquid for cooling and lubricating the parts.

In accomplishing these and other objects of the invention, I have provided improved details of structure, a preferred form of which is shown in the accompanying drawings, in which:

Figure l is a side elevational view of a portion of a roll stand in which the bearing chocks are constructed in accordance with the present invention;

Figure 2 is an end elevational view of a portion of the roll stand with the housing broken away;

Figure 3 is a top plan view on a larger scale of the upper bearing chock;

Figure 4 is a vertical section on line lV-lV of Figure 3;

Figure 5 is a vertical section on line V--V of Figure 4;

Figure 6 is a vertical longitudinal section on a still larger scale of the lower bearing chock; and

Figure 7 is a vertical section on line VlL-Vll of Figure 6.

Figures 1 and 2 show somewhat diagrammatically one side of a hot strip mill roll stand which includes a housing it) and upper and lower work rolls 12 and 13. These rolls have the usual necks 12a and 13a and wobblers 12b and 13b. The housing has the usual window 14 within which are carried upper and lower chocks 15 and 16. The chocks contain bearings, hereinafter described in detail, which rotatably receive the roll necks. The housing, the means fixing the chocks in the Window, and the rolls are not described in detail since they can be of any standard or desired construction.

Figures 3, 4 and 5 show details of the upper chock 15. This chock is formed of two vertically telescoping sections 15a and 15b which are held together by bolts 17. On its pressure side (i. e. the upper part) the chock contains a nonmetallic bearing shoe 18 fitted into a slot or cutout 19. This bearing shoe can be of a fabric composition or plastic, such as a phenolic resin, as known in the art. One surface 18a of the shoe is arcuate and contacts the roll neck. The other surface 18b, which faces the cutout in the chock, preferably is flat. Behind the face 18b of the bearing shoe the chock contains a liquid chamber 20, which extends horizontally across the full width of the shoe and vertically along both sides thereof. This chamber is situated intermediate the length of the shoe, and portions of the back face 18b and the side faces of the shoe are exposed directly thereto. The roll neck 12a is exposed to the ends of the chamber beyond the side faces of the shoe. The chock also contains an inlet 21 to this chamber.

The outside face of the chock carries an end plate 22 fastened thereto by cap screws 23, one set of con nections being slotted as indicated at 24 (Figure l) to permit telescoping adjustment of the sections 15a and iii). The inside face of the chock carries a semicircular nonmetallic thrust bearing 25 of similar material to the bearing shoe. Said thrust bearing surrounds the pres sure side only of the roll neck and is affixed to the chock by retainer bars 26 welded to the upper telescoping section 15a. The bearing shoe is retained in place in the slot 1? by the thrust bearing 25 and the end plate 22 without the need for additional clips or fasteners.

The lower side of the upper chock carries another bearing shoe 2'7 fitted into a slot 28. Preferably the shoe 27 is of the same construction as the shoe 18 and is adapted to carry the Weight of the roll 12 when there is no workpiece between the rolls. However it is not ordinarily necessary to supply cooling and lubricating liquid behind the shoe 27 and no passages are shown for this purpose. The inner face of the lower telescoping section 15b carries a retainer bar 29 for the shoe 21, the bar preferably being welded to the chock section.

Figures 6 and 7 show details of the lower chock 16. in construction the lower chock is similar to the upper chock, except that it is somewhat simplified. Preferably it is formed of a single integral section. On its pressure side (i. e. the lower part) the chock carries a bearing shoe 3i) fitted into a slot or cutout 31. Behind the shoe the chock contains a chamber 32 which has an inlet 33. The shoe and chamber are the same as in the upper chock so that the description need not be repeated. The outside face of the chock carries an end plate 34 which is similar to that on the upper chock except that the slotted connection is omitted. The pressure side only of the lower chock carries a semicircular thrust bearing 35 aflixed oy retainer bars 36, the same as the corresponding parts 111 the upper chock. The upper side of the lower chock preferably carries a smail nonmetallic bearing insert 37 which is not required to sustain any great force, but merely guides the lower roll as it rotates.

in operation, cooiing and lubricating liquid, commonly water, is introduced to the inlets 21 and 33 of the upper and lower chocks and 16 and flows into the chambers 3 thereof. Such liquid comes directly into contact with the back and side faces of the bearing shoes 18 and for cooiing the adjacent portions thereof. The liquid emerging from the ends of the chambers cools the roll necks 12a and 13a and works its way between the necks and the arcuate faces of the bearing shoes and thus lubricates these parts. The liquid discharges from both the inside and outside of the chocks. The thrust bearings and act as baffles for deflecting liquid that discharges on the inside of the chocks against the end faces of the bodies of rolls 12 and 13. The sides opposite the pressure sides are open so as not to interfere with such discharge.

From the foregoing description it is seen that the chocks of the present invention are of simple construction and yet afford ready access for cooling and lubricating liquid to act on the bearings. There are no restricted passages where clogging can occur, and the bearing shoes are exposed directly to the liquid chambers in the chocks.

While I have shown and described only a Single embodiment of the invention, it is apparent that modifications may arise. Therefore I do not Wish to be limited to the disclosure set forth but only by the scope of the appended claims.

I claim:

1. A roll bearing comprising a chock containing a bore adapted to receive a roll neck and an internal slot extending from said bore at the pressure side thereof, a bearing shoe fitted into said slot and having a concave arcuate face adapted to contact the roll neck, said chock having a water inlet passage spaced from the back of said shoe and a chamber which communicates with said passage, extends across the back of said shoe and opens directly into said bore at both sides of said shoe, the back and side faces of said shoe being exposed directly to said chamber throughout the entire cross-section of the shoe, means on the inner and outer faces of said chock retaining said shoe in said slot and allowing water to discharge from said bore through at least one end face of said chock in an open circuit, and means in said chock adjacent said bore on the side opposite said shoe for engaging and guiding the other side of the roll neck.

2. A hearing as defined in claim 1 in which said rctaining means includes a semicircular thrust bearing mounted on the inside face of said chock over the pressure side of said bore, the other side of the bore at the inside face being open, and an end plate mounted on the outside face of said chock, said thrust bearing acting as a bafile to direct water from said bore through the open side thereof over a roll body.

References Cited in the file of this patent UNITED STATES PATENTS 408,663 Kleman Aug. 6, 1889 1,421,805 Melown July 4, 1922 2,488,514 OMalley Nov. 15, 1949 FOREIGN PATENTS 560,273 Great Britain Mar. 28, 1944

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