US2102809A - Rolling mill housing - Google Patents

Description

ROLLING MILL-HOUSING Filed March 8, 1955 5 Sheets-Sheet l llll lllllllllll ll llll FIG.

FIG-

INVENTOR Dec 21, 1937. REMMEN 2,102,809

ROLLING MILL HOUSING Filed March 8, 1935 3 Sheets-Sheet 2 FIG- 6 FIG- 5 INVENTOR f mmflsy mz Dec. 21, 1937.

J. REMMEN ROLLING MILL HOUSING Filed March 8, 1935 3 Sheets-Sheet 5 m UN.

m UNBN INVENTO'R r M ATTORNEY Patented Dec. 21, 1937 PATENT OFFICE ROLLING MILL HOUSING Jorgen Remmen, Pittsburgh, Pa.

Application March 8,

4 Claims.

This invention relates to improvements in rolling mills and it is among the objects thereof to providea shear frame type of housing to permit removal of the rolls from the frame without necessitating their withdrawal through the housing windows.

The invention further contemplates different designs of shear frame type housings adapted to the removal of the rolls from the front of the mill including the employment of removable tension members to reduce the elongation of the housing or frame when excessive rolling pressures are applied.

, It is customary when changing rolls to withdraw the rolls through the housing window. This, however, requires rather large windows to permit the body of the rolls to be removed this way. Especially large windows are required in the ordinary four-high mills with the roller bearings on the necks because of the large roller bearing chucks. The sleeve type mill does not require such large windows as, it has the roller bearings mounted in the sleeve of the back-up rolls, but the housing windows of the sleeve type mill are likewise excessively large to provide for the removal of the back-up rolls.

The use of expensive auxiliary equipment and labor operations is incident to the removal of the rolls through the housing windows.

By means of the present invention, the rolls can be lifted out through the front of the shear type frame by an ordinary crane and chain slings, thus not only eliminating the complicated and expensive roll changing machinery and opera tions, but also facilitating quick and easy roll changing. Various forms of shear frame type housings for two and four-high rolling mills embodying the principles of this invention are shown in the accompanying drawings constituting a part hereof in which like reference characters designate like parts and in which:

Fig. 1 is a front elevational view partially in section of a rolling mill, the housing of which is of the shear frame type;

'Fig. 2 a side elevational view thereof;

Fig. 3 a cross section taken along the horizontal center line of the bottom roll of Fig. 2;

Fig. 4 a side elevational view of a two-high rolling mill of the shear frame type employing an a removable member on the front of the hous- Figs. 5 and 6 front and side elevational views respectively of a four-high mill embodying the shear frame type housing with an open gap for 5 removal of the rolls;

1935, Serial No. 9,965

Figs. 7 and 8 side elevational views of a modifled form of four-high mill, shear frame type, with removable members spanning the gap of the housing; and if Fig. 9 a front elevation of a fragmentary portion of a tension member of the structure shown in Fig. 8.

With reference to Figs. 1 and 2 of the drawings, the numeral I designates the mill frame consisting of the housings 2, joined by yokes 3 and 4, the housings resting on a base. 5. Windows 6 are provided in the housings 2 foitreceiving journal blocks 1 that support the necks 8 of the rolls 8a, the rolls being relatively adjustable by the usual screw mechanism generally designated by the numeral 9 which raises or lowers the upper journal blocks I. The windows for the journal blocks are off-set with respect to the vertical center line of the frame so that the strain imposed by the working rolls is distributed entirely on the frame side of the vertical center line of the roll axes. The screwmechanisms are actuated by a worm drive I0 and a motor driven transmission unit designated by the numeral ll mounted at the top of the shear frame housing. A gap I2 is provided at thefront of the housings 2 to permit the removal of the rolls 8a.

To remove the rolls, the upper journal block I is raised to position above the gap l2 and locked in position; the upper roll may then be lifted out of its bearing by a chain sling and crane and withdrawn through the gap in the front of the housing. The top roll carrier can be similarly removed to render the bottom roll accessible which is raised and withdrawn through gap l2 in the same manner.

Fig. 3 shows a bearing block construction la which takes up the side thrust of the roll bearing, this construction being feasible by use of the open front frame that permits removal of the rolls by lifting instead of by axial movement through the windows of the housings as heretofore practiced.

In Fig. 4 of the drawings, the two-high roll shear frame structure is generally the same as shown in Figs. 1 and 2 and is provided with a hinged member l3 at the front thereof that is pivoted at M and adapted to slide over a stud l5, this being slotted to receive a wedge IS. The hinged member closes the gap in the front of the housing frames 2.

In Figs. 5 and 6 of the drawings, a shear frame type roll housing with an open front gap for four-high mill is shown. The numeral l8 designates the base, I!) the side housings and 20 the gap for removal of the rolls in the front end of the housing frames. The numeral 2| designates the work rolls, and 22 the back-up rolls which are supported in suitable bearing blocks 23.

In this form of construction, the rolls are removed by raising the top roll a suflicient amount to clear the work rolls which are lifted and removed through .the gap 20. After looking the top roll chuck in raised position, the upper backup roll may then be lowered and removed through gap and the lower back-up roll raised for removal through the gap", all by means of ordinary hoisting and-suspension equipment.

It is to be noted that because oftherelatively small housing windows, the frame need not be as massive to resist the rolling strains and elongation as where larger windows to accommodate the removal of the large back-up rolls are used.

In the modifications shown in Figs. 7 and 8, gap closing and tension members 24 and 25 are applied by pivoting them to the lower front of the frame at 26 and 21, respectively, the closing member 24 being-held by studs 28 as in the structure of Fig. 4. The tension members 25 of Fig. 8 are hinged at 21 and their free ends 29 are T-shape to engage each a plurality of lugs 30. The tension members 25 are each provided with straps 3| for engaging pins 32 on lugs to prevent displacement of the tension members by possible vibration when the mill is in operation.

It is obvious from the foregoing description of the invention that the shear type roll gap frame facilitates easy roll changing without necessitating the employment of special equipment and that such frames are of rugged construction to resist the rolling strains.

Although several embodiments of the invention have been herein illustrated and described, it will be obvious to those skilled in the art that various modifications may be made in the details of construction without departing from the principles herein set forth.

I claim:

1. In a rolling mill, a shear type frame having windows in the sides for receiving the journal blocks of the roll necks, said windows being smaller than the diameter of the rolls and said frame having relatively small gaps in the front for the removal of the roll necks therethrough, the windows extending downwardly a sumcient distance from the bottom of the gap to receive the lower and upper journal blocks of the lower roll and the lower journal blocks of the upper roll, and said mension of said gap a suflicient distance to permit raising the upper journal block of the upper roll a sumcient amount to clear said gap, whereby the upper and lower rolls may be successively lifted out of their bearings and withdrawn through the gap.

2. In a rolling mill, a shear type frame having windows in the sides for receiving the journal blocks of the roll necks, said windows being smaller than the diameter of some of the rolls and said frame having relatively small gaps in the front for the removal of the roll necks therethrough, the windows extending downwardly a suflicient distance from the bottom of the gap to receive the journal blocks 'of a lower back-up roll and a pair of working rolls, and said windows extending upwardly from the upper dimension of said gap 8. sufllcient distance to permit the raising of the upper back-up roll a sumcient amount to clear said gap whereby the upper and lower working rolls may be successively lifted out of their bearings and withdrawn through the gap andthe upper and lower back-up rolls successively removed through said gap in the order named.

3. In a rolling mill, a shear type frame having windows in the sides for receiving the journal blocks of the roll necks, said windows being smaller than the diameter of some of the rolls and said frame having gaps in the front for the removal of the roll necks therethrough, said gaps also being smaller than the diameter of some of the rolls, the windows extending downwardly a sufficient distance from the bottom of the gap to receive the journal blocks of a plurality of rolls, and said windows extending upwardly from the upper dimension of said gap a distance permitting raising of the upper roll a suflicient amount to clear said gap whereby the upper and lower rolls may be lifted out of their bearings and withdrawn through the gap.

4. A rolling mill structure as set forth in claim 3 characterized by gap closing members hinged to the frame below the gap and removably attached to the frame above the gap, said closing members extending into and filling the gap.

JORGEN REmlIEN.

. windows extending upwardly from the upper di-

Images