US1727505A - Steel-rolling-mill bearing - Google Patents

Description

Patented Sept. 10, 1929.

UNITED ATE "PATENT OFFICE.

JAMES .A. HALLgOF LOS ANGELES, CALIFORNIA ASSIGNOR TO SUPER-IEJFJFI1\'IIE2]) METALS CORPORATION, A CORPORATION OF CALIFORNIA.

STEEL-ROIiIiIIfilG-MILL BEARING.

Application filed April 20, 1925. Serial no. 24,663.

This invention relates to steel rolling mill bearings. The usual rolling mill bearing comprises'upper and lower parts that en gage the roll necks or journals. These parts usually break or crack through the center lengthwise in a jagged line due to the great frictional heat, shocks, loads, and impacts to which they are subjected.

Although bearings thus broken or cracked may still be utilized they materially affect the size of steel coming from the finishing set of rolls and score the roll neck or journal, hence they must be removed as soon as possible and be replaced with new bearings.

The object of this invention is to provide a bearing for steel rolling mills which will not crack or break.

Another object is to provide a bearing which will dissipate the loads, shocks, and impacts transmitted by the roll necks or journals to the bearings.

Another object is to provide a bearing the life of which is not materially affected by expansion and contraction caused by frictional heat.

These objects are accomplished by the in vention herein set forth by the following description of the accompanying drawings illustrating the practical embodiment of the invention, the novel features thereof being pointed out in the appended claims.

Referring to the drawings:

Fig. 1 is a front elevation of a steel rolling mill in which the bearing constituting the invention is herein illustrated.

Fig. 2 is a side elevation.

Fig. 3 is a horizontal section taken on line 3-3 of Fig. 1.

Fig. 4 is a perspective view showing the improved bearing resting in a chuck.

Fig. 5 is a perspective View of one part of the bearing.

Fig. 6 is a perspective view of the complementary part forming the other portion of the bearing.

Fig. 7 is a perspective view of a modified form of the improved bearing.

Fig. 8 is a perspective view of a modified form of the improved bearing.

Referring by numerals to the accompanying drawings 10 generallydesignates a steel rolling mill of standard construction which is mounted on foundation 11. The rolling mill consists of frames or standards 12 secured to thefoundation by anchor bolts 13. The standards 12 have oppositely disposed upright portions 14 upon which are formed ribs for guides 15 which engage channels 16 of chucks 17 The chucks 17 have substantially rectangular shaped recesses .18 which are adapted to receive the bearings for supporting the rolls R. V

The bearing constituting I the invention is generally designated at 19 and consists of two parts 20 and 21. The parts 20 and 165 21 have curved portions 22 which are cast on a radius adapted to fitthe roll neck or journal N of the rolls R. The parts 20 and 21 have flat side faces 24:, flat bottoms 25 and flat end faces 26 and 27 respectively. '70 The flat end faces 27 project outwardly forming flanges 28. The curved portion 22 is chamfered at its termination 29 to interfit the fillets of the roll neck or journal.

In the preferred embodiment of the in- 7 vention the part 20 has a Vshaped tongue '30 which is adapted to interlock in a corresponding shaped channel31 formed in the part 21. As clearly shown in Fig. 4 it will be seen that the parts 30'and 3linter-l0ck and that the flat faces 24, 25 and 26 fit securely within the recess 18 of'the chuck 1T 'thereby'forming a bearing.

Referring to Fig. 7 the bearing is substantially the same as the bearing illustrated in Figures 4 to 6 but is particularlyadapted to steel rolling mills where the diameter of the roll neck or journal is small, itbeing understood all surfaces and faces are cast allowing no finisln hence it'would be difficult to cast the tongue and groove construction as illustrated in Figures l to6 Where the bearings used are very thin. This bearing. comprises portions 32 and 33 which have curved portions 34 adapted to receive the roll neck or journal. In place of the tongue and groove construction illustrated in Figs. 1 to (ifiat diagonal faces 35 are substituted.

The modificationshown in Figure 8 can be furnished at less expense although it is not as desirable as the construction shown in Figures 4 to 6. This bearing comprises portions 36 and 37 which have curved portions 38 adapted receive the roll neck or journal. In place of the tongue and groove fit illustrated in Figures 4; to 6 flat vertical faces 39 are substituted. 7 a

From the construction it will be seen that the improved bearing is formed in two pieces and that it will not break or crack in a jagged or irregular line due to shocks and impacts or heavy loads, as they will be transmitted to, either or both parts of the bearing which will yield sufficiently or permit these forces to be expended without deteriorating the bearing except from usual'frictional wear.

It will also be seen that the yielding action of the improved hearing will materially reduce frictional heating of bearing thereby eliminating to a great extent expansion and contraction of the bearing.

Various changes may be made without departing from the spirit of the invention.

What is claimed is V I 1. In a rolling mill, the combination of: a mill roll havinga journal; a pair of opposed half-bearing blocks adapted to fit opposite portions of the bearing surface of said journal; and a chuck for rigidly positioning said journal by bringing said half-bearing blocks pressurally towards each other against said journal, one of said half-bearing blocks being divided longitudinally into two parts substantially on the axis of said pressure, one

of said parts having a groove and the other of said parts having, a tongue which interengage to form a flexible tongue and groove connection between said parts.

2.-In a rolling mill, the combination of: a mill roll having a ournal; a pair of opposed half-bearing blocks adapted to fit opposite portions of the bearing surface of said jourprovide a relatively flexible joint between said parts.

In testimony whereof I have signed my name to this specification.

JAMES A. HALL.

nal; and a chuck for rigidly positioning said journal by bringing said half-bearing blocks pressurally towards each other against said journal, one of said half-bearing blocks being divided longitudinally into two parts substantially equal in size, said parts being formed to meet flexibly in a tongue and groove connection.

3; In a rolling mill,'the combination of: a mill roll having a journal; a pair of opposed half-bearing blocks adapted to fit opposite portions of the bearing surface of said journal; and a chuck for rigidly positioning said journal by bringing said half-bearing blocks pressurally towards each other against said journal, one of said half-bearing blocks being divided longitudinally into two parts substantially on the axis of said pressure, said parts having complementary formations which meet to forma relatively flexible joint between said parts, said oint preventing dis-

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