US1712575A - Apparatus for changing rolls - Google Patents

Description

May 14, 1929. MCARTHUR 1,712,575

APPARATUS FOR CHANGING ROLLS Filed May 3, 1927 3 Sheets-Sheet l H1 IIIIIIIIIII #677702 E. Mkerwue, M

- A's rib/neg May 14, 19 9- A. R. M ARTHUR APPARATUS FOR CHANGING ROLLS Filed May 3, 1927 5 Sheets-Sheet QM NM Patented May 14, 1929.

UNITED STATES PATENT OFFICE.

ARTHUR R. MCARTHUR, OF GARY, INDIANA, ASSIGNOB TO AMERICAN SHEET AND TIN PLATE OOMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

APPARATUS FOR CHANGING ROLLS.

Application filed May 3, 1927. Serial No. 188,602.

This invention relates to an improved apparatus for changing the rolls of a rolling mill, and has for its object the provision of an apparatus which will facilitate the changing of the rolls and require less labor than the apparatus now generally in use.

By using the apparatus of this invention, the time necessary to change a pair of rolls is materially reduced and, therefore, the tonnage output of the mill is increased accordingly.

In the drawings- Figure 1 is a side elevation showing a set of rolls being changed.

Figure 2 is a plan view of the rolls changing housing.

Figure 3 is a side elevation of the housing.

Figure 4 is an end view of the housing.

Figure 5 is a sectional elevation on line V-V of Figure 3.

Referring more particularly to the drawings, the numeral 2 designates a roll stand or housing from which the rolls 3 and 4 are being removed. The roll stand 2 is of standard design in which the rolls 3 and 4, which are comparatively light weight, are the working rolls and are backed up by heavier backing rolls 3 and 4*. The lower backing-up roll 3 is journaled in fixed bearings, while the upper backing-up roll 4* is mounted in the usual counterbalanced bearings, (not shown,) which normally hold it in its upper position against suitable roll adjusting screws, (not shown,) so that when the adjusting screws are loosened this upper backingup roll will move upwardly away from the working roll 4 and permit the working rolls 3 and 4 to be withdrawn from the housing. The rolls 3 and 4 are shown partly withdrawn from the housing 2 and carried by the suspended roll changing housing A, which housing also carries a new set of rolls 5 and 6 to be mounted in the roll housing 2. The roll changing housing A is suspended by a doubleloop sling composed of loops 7 and 8, which sling is suspended from an overhead carrier such as the hook 9 of a traveling crane, (not shown).

The roll changing housing A comprises a lower coupling member 10 having a coupling socket 12 formed on each end thereof adapted to receive the wabblers or pods of the rolls to be changed. A pair of side plates 13 and 14 are bolted to the opposite sides of the coupling member 10 and extend above said coupling to form guides for a pair of upper coupling members 15 and 16.

The coupling member 15 and 16 are mounted, end to end, in the space between the side plates 13 and 14 above the coupling member 10 and have coupling sockets 17 and 18, respectively, on their outer ends which sockets are in vertical alinement with the coupling sockets 12 on the member 10.

The coupling members 15 and 16 are provided with a pair of dovetailed guides 19 on each side face, which guides are fitted into undercut guideways 20 in the side plates 13 and 14 and are adapted to maintain the coupling members 15 and 16 in parallel alinement with the coupling member 10.

The coupling members 15 and 16 are adapted to be adjusted vertically relative to the coupling member 10 by pairs of left and righthand threaded screws 22-23 and 24-25.

The screws 22-23 and 24-25 are journaled between ball-thrust bearings 26 in counterbored portions 27 of apertures 28 in the coupling members 15 and 16, and have their lower ends threaded into nuts 29 keyed in counterbored portions 30 of the apertures 28.

' The bearings 26 are secured in the counterbored portions 27 of the apertures 28 by threaded bushings 31, while the nuts 29 are secured in the counterhored portions 30 by threaded plugs 32.

The upper ends of the screws 22-23 and 24-25 are provided with bevel gears 34, and the gears 34 on the respective pairs of screws 22-23 and 24-25 are in mesh with bevel gears 35-36 and 37-38 on shafts 39 and 40, respectively' The shafts 39 and 40 are journaled in bearings 41 and 42, respectively, on the couplings 15 and 16 and are provided with squared ends 43 to receive a crank or other suitable tool for turning said shafts. By turning the shafts 39 and 40 the operator may readily adjust the coupling members 15 and 16 vertically so that they are correctly spaced to receive the wabblers or pods of the rolls to be changed.

The bottom of the coupling member 10 and the side plates 13 and 14 are provided with grooves 45 and 46 which are spaced, respectively, an equal distance from the opposite ends of the device so that when the loops 7 and 8 of the sling are mounted in said grooves and the housing is elevated, said housing will be balanced in the sling.

In changing rolls in accordance with the method of this application, the new rolls 5 and 6 are first mounted, one above the other, in a suitable rack Y, as shown in Figure 1. The housing A is then lifted by the crane or other lifting element, with the loops 7 and 8 of the sling in the grooves and 46, and the housing is moved endwise so that the sockets 12 and 17 on the one end of the device are moved into position to receive the wabblers or pods on the one end of the new rolls 5 and 6.

he one loop 7 of the sling is then removed from the groove 45 and mounted around the free neck portions of the rolls 5 and 6, and the housing and rolls are moved into a position opposite the end of the mill roll housing from which the rolls are to be removed. When the roll changing housing is positioned opposite the rolls to be changed it is then moved endwise so as to enter the wabblers or pods of the rolls to be chan ed into the coupling sockets 12 and 18. ter the both sets of rolls are thus engaged in' the roll changing housing, the loop 7 of the sling is again moved into the groove 45 and the crane is then operated to move the housing A and both sets of rolls endwise so as to remove the old rolls endwise through the window of the roll housing and free of the mill. After the old rolls have been removed from the roll housing, the roll changing housin A, which is now supporting both the old an new rolls, is turned 180 degrees so as to reverse the position of the old and new rolls relative to the roll housing, and the crane is then operated so as to move the new rolls endwise into the roll housing through the window in the side thereof. After the new rolls are thus mounted the sling loop 7 is removed from the groove 45 and mounted over the necks of the old rolls, and the roll changing housing A and old rolls are then moved away from the mill.

When removing the old or worn rolls 3 and 4 through the window of the roll housing 2, the bearing boxes and 51 are necessarily removed with the rolls. Therefore, it is necessary to provide new bearing boxes 50 and 51 on the necks of the new rolls which will be mounted in the side of the roll housing from which the bearing boxes are removed.

The above method provides for quick changingof the rolls and eliminates much of the manual labor now necessary, and, therefore, is superior to any of the methods of changing rolls now generally used.

I claim 1. A roll changing housing, comprisin a coupling member having a coupling socket at each end thereof, a pair of other couplin members arranged end for end and mounte above said first named coupling member, said last named coupling members being provided with coupling sockets on their outer ends, and means for adjusting said last named coupling members vertically relative to said first named coupling member.

2. A roll changing housing, comprisin a coupling member having a coupling socket at each end thereof, a pair of side plates secured to said first named coupling member and extending materially above the top face thereof, a pair of other coupling members arranged end for end and mounted above said first named coupling and within said side plates, said last named coupling members being provided with coupling sockets on their outer ends, and means for adjusting said last named coupling members vertically relative to said first named coupling members.

3. A roll changing housing, comprisin a coupling member having a coupling soc 'et at each end thereof, a pair of side plates secured to said first named coupling member and extending materially above the top face thereof, a pair of other coupling members arranged em for end and mounted above said first namedcoupling and within said side plates, said last named coupling members being provided with coupling sockets on their outer ends, and screw means for adjusting said last named coupling members vertically relative to said first named coupling members.

4. A roll changing housing, comprisin a coupling member having a coupling socket at each end thereof, a pair of side plates secured to said first named coupling member and extending materially above the top face thereof, a pair of other coupling members arranged end for end and mounted above said first named coupling and within said side plates, said last named coupling members being provided with coupling sockets on their outer ends, means for adjusting said last named coupling members vertically relative to said first named coupling members, and means for guiding said last named couplings during their vertical movement.

In testimony whereof, I have hereunto signed my name.

ARTHUR R. MoARTHUR.

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