US1618942A - Method eor grinding rolls - Google Patents

Description

Feb. 22.1927. 1,618,942 A. D? OB R|EN ET AL METHOD FOR GRINDING ROLLS Filed June 50,. 1926 2. Sheets-Sheet 1 Fen] 22-; 1927. 1,618,942

.A. D. OBREEN ET AL METHOD FOR GRINDING ROLLS Filed June 30, 1926 2 Sheets-Sheet 2 Patented Feb. 22, 1927.

UNITED STATES PATENT OFFICE.

ARTHUR D. OBRIEN AND DELBERT B. GEESEMAN, OF CANNONSBURG, PENNSYLVANIA, ASSIGNORS T CONTINENTAL CAN 00., INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

METHOD FOR GRINDING ROLLS.

Application filed June 30, 1926.

The invent-ion relates to a new and useful method of reducing or removing the bearings from the rolls of a sheet rolling mill.

An object of the invention is to provide a method of reducing or removing the bearings forming on the rolls during the rolling of the sheets whereby the bearings can be ground off by rotating grinding wheels while the rolls are idly turning in the mill and with little interruption to the operation of the mill.

In the drawings which show one form of apparatus for practicing the method Figure 1 is a vertical sectional view through a sheet and tin plate mill, adjacent the left-hand housing of the mill, and showing in side view the grinding wheel and the means for supporting and operating the same, said view showing in dotted lines the grinding wheel shifted foroperation upon the lower roll of the mill;

Fig. 2 is a horizontal sectional view through the mill, and showing in plan view the grinding apparatus used in grinding the bearings at both ends of the rolls, and

Fig. 3 is a detail showing in section the manner of mounting the grinding wheel on its operating shaft.

The invention is directed broadly to a method of reducing or removing the bearings formed on the ends of the rolls of a sheet and tin plate mill. It is well-known that during the rolling of sheets in mills of the above type. that the rolls wear at the region where the rolls make contact with the sheet, and this wearing of the rolls soon brings about a condition wherein the rolls must be removed and redressed. Appli cants invention is directed particularly to a method for removing or reducing these hearings without removing the rolls from the mill. This is accomplished by means of a rotated grinding wheel which is so mounted that "it may be moved freely either against 5 the roll or along the roll, and the bearing ground or reduced at the extreme end of the roll. The ends of the roll are, of course, close up to the housing or end supports for the rolls and the bearings must be ground or reduced to the extreme end of the roll,

as noted, and this necessitates the grinding wheel being arranged and operated so as to abradingly engage said roll immediately adjacent its end support. The grinding wheel Serial No. 119,633.

is manually controlled in all its horizontal movements, and thus it is that the grinding action may be restricted to the area where the roll must be reduced. By this manual control of the grinding wheel, the bearings may be quickly reduced so that the entire reducing of the bearing may be accomplished before the roll has lost its heat, and thus the operation of the roll is not interfered with, and furthermore, the rolls of the mill are retained in proper condition to go on with the work. This is accomplished by providing a support which is preferably supported from a traveling crane, so that the apparatus is portable and readily, taken from one mill to another. The support is also so mounted on the traveling crane that said support may be moved in any horizontal direction, so that the grinding apparatus is under the control of the operator as to the region where the grinding is to take place, and also as to the extent of grinding. The grinding wheel is mounted on the support so that no part of the support extends beyond the side face of the grinding wheel in the region of the grinding wheel, and therefore, the grinding wheel can be moved along the roll of the tin plate mill, and grinding effected to the extreme end of the roll without any interference from the housing of the mill which projects in front of the roll. In view of this arrangement of the grinding wheel, we prefer to use two grinding devices, which are made right and left, that is, the grinding wheel is on the right of one support and on the left of the other support, and by the use of these two devices, the bearings may be ground at both ends of the roll at the same time. This is another way in which the time required for reducing the bearing is reduced to a minimum.

By our improved method, the rolls of the mill may be reduced so efliciently and so quickly that the mill may be used substantially continuously throughout the entire weeks work.

It is well recognized mill practice to change the width of the sheet and roll a narrower sheet after the bearings are formed, or otherwise an imperfect sheet would be rolled. By our improved method after the bearings are reduced or removed, it is possible to continue the rolling of sheets of the is a well-known term in this art.

two cooperating rolls 2 and 8,0ne of which is positively driven and the other of which is driven by frictional contact w th tl e driven roll ofa plate which 18 passing between the rolls. This tin plate mill. and the rolls are of the usual character. When rolling steel plates for reducing the thickness thereof, bearings form on the rolls as indicated at 1 and 5 in the drawings. These bearings are caused by reason ofthe fact that the metal plate'being rolled is of less width than the'length of the roll, and as these plates go through one after another, the rolls Wear in the region where they make contact with the plates. At the ends of the rolls where the plates do not make contact,

the roll is not worn away, and the part which remains is referred to as the bearing. This The apparatus consists of two grinding devices 6 and 7. These grinding devices are similar in construction, except that they are right and left-handed as will be referred to more fully hereinafter. The grinding devices are supported from an overhead crane which is capable of being moved from one part of the 2 mill to another, so that the grinding devices may be thus transferred from one mill to another. Each grinding device is supported by a flexible member "8 preferably in the form of a chain.' Each grinding device consists of a support 9in which is mounted a shaft 10. V A motor 11 mounted on thesupport Sis connected to the shaft and operates "to rotate the shaft. Attached to the-support 9are hand grips 12, 1.2 which enable the ope eratorto swing the support either laterally or endwise, or in any di recti-on'in a horizontal plane. On the end of the support 9 is a supporting bracket 13. The shaft 10 extends through this supporting bracket 13 and is provided with a bevel gear 14. Mounted in suitable bearings in the bracket 13 is a cross shaft 15. On the cross shaft 15 is a bevel gear 16 which meshes withthe bevel gear 14. Thus it is that the shaft 10 imparts rotation to the shaft 1 5. Mounted on the outer end of the shaft 15 is a, grinding wheel 17. Said grinding wheel 17 is provided with a cylindrical grinding surface 18 and is also provided with a recess 19. On the shaft 15 is a washer or supportingplate 20. The shaft 15 extends through the grinding wheel and in therecess 19 is a Washer or plate 21. A nut 22 is threaded on to the end of theshaft 15, and said nut clamps the plate 21 against the outer face of the grinding wheel. and forces the grinding wheel against the plate 20, and thus it is that the grinding wheel is firmly secured to the shaft 15. It will be noted that the nut 22, and in fact, the end of the shaft 15, is inside the outer plane or face of the grinding wheel 17. The only difference between the two devices shown in Fig. 2 is that the grinding wheel 17 is mounted on the right-hand end of the shaft 15 in one apparatus, and is mounted on the left-hand. end of said shaft in the other apparatus, as viewed-by the operator when operating said devices. The hand grips 12 enable the operator to move the grinding wheel at will back and forth lengthwise of the roll, and across the bearing formed thereon at oneend of the roll" The grinding wheelcan be moved back and forth in the region where the bearing is formed without subjecting the remainder of the rollto any grinding action. The grinding wheel can be pressed against the roll as the bearingis groundaway, andthus it is that the hearing at the end of the roll may be quickly ground off. Inasmuch the outer face of the grinding wheel is free from any projections, 'the grinding wheel may be moved along the roll of the tin plate mill to the extreme end thereof with out interference from'the housing 1 in which the rolls are mounted; .7 I

Mounted on the bracket 13 is'a shield23 which is secured thereto by suitable bolts 24:.

This shield is so shaped and positioned that the forward side of the grinding Wheel is exposed, and the grinding wheel is, therefore, a'bradingly engageable' with the bearings on the rolls. V

The method of reducing andremoving the bearings formed on the. rolls of a sheet and tin plate mill immediately adjacent the end supports for the rolls consists insubjecting the hearings on first one'roll'and then'the other, while hot,and while the rolls are rotating idly in the mill, to a rotating grinding wheel having the grinding face thereof exposed so that the grinding wheel 'is abradingly engageable with the rolls immediately adjacent its end'support and freely moving said grinding wheelradial ly 0f the roll into engagement with the bearing and longitudinally of the roll across the bearing until it is removed. In its preferred form, the

method consists in'the use of two rotating grinding wheels, havingtheir grinding facesexposed so as to form rightfand left-hand grinding wheels, and abradingly engaging the bearings on one ofthe rolls simultanes ously, but ind ependentl y, u'ntil'sai d bearings are removed and the roll reducedto normal condition for rolling slieets,;and then subjecting the bearings onthe other roll to the grinding wheels in like manner, until said' bearings are reduced, and said roll restored to normal condition for rolling sheets. This can be accomplished in a very short period of time, owing to the fact that the shifting of the grinding wheel may be done at will, and only that part of the roll which is necessary to be removed is ground. By this method of removing the bearings, the plate rolling mill may be operated on plates of a maximum Width, or of the same width throughout the entire operating period, and furthermore, the bearings may be removed occasionally during the operating period so quickly as to cause very little interference in the continued operation of the rolling mill.

Having thus described the invention, what we claim as new and desire to secure by Letters-Patent, is

1. The method of reducing and removing the bearings formed on the rolls of a sheet and tin plate mill immediately adjacent the end supports for said rolls during the rolling of the sheets, consisting in subjecting said hearings on first one roll and then the other, while hot, and While the rolls are rotating idly in the mill to a rotating grinding wheel mounted for free manual movement radially of the roll and longitudinally of the roll, and abradingly engageable with said roll immediately adjacent its end support, whereby said grinding wheel may be moved back and forth, at will, across a hearing until the bearings are removed and the roll restored to a normal condition for rolling sheets. a

2. The method of reducing and removing the bearings, formed on the rolls of a sheet and tin plate mill immediately adjacent the end supports for said rolls, consisting in supplying two rotated grinding wheels, having the grinding faces thereof exposed so as to form right and left-hand grinding wheels, abradingly engageable with said rolls immediately adjacent its end supports, and mounted adjacent the mill for free inclependent manual movement radially of the roll and longitudinally of the roll, whereby said grinding wheels can be moved back and forth, at will, across the bearings at the ends of the roll until said bearings are removed and the roll restored to normal eondition for rolling sheets.

In testimony whereof, we aflix our signatur-es.

ARTHUR D. OBRIEN. DELBERT B. GEESEMAN.

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