US2184582A - Edge rolling - Google Patents

Description

Dec. 26, 1939. c 2,184,582

EDGE ROLLING Filed April 8, 1937 i 5 4 Q J z 2 i 4 w d flow/4E0 0. (00K,

Patented Dec. 26, 1939 UNITED STATE-S EDGE ROLLING Howard D. Cook, Elyria, Ohio, assignor to National Tube Company, a corporation of New Jersey Application April 8, 1937, Serial No. 135,803

4 Claims.

This invention relates to the rolling of bars, skelp, and fiat shapes in general, and is particularly concerned with the rolling of such products by means of mills embodying horizontal reducing rolls and vertical edging, rolls, one of the objects being to edge the work by means of the vertical rolls so as to produce accurately formed edges without involving rapid roll wear, and so that the same edging pass may be used to ac- 1U commodate work within a considerable range of thickness. Other objects may be inferred from the following disclosure of a specific example of the invention.

Referring to the accompanying drawing:

Figure 1' is a top view of a stand of vertical edging rolls embodying the principles of the invention.

Figure 2 is a view taken from the line 11-11 in Figure 1.

Figure 3 is an enlarged view taken from the line III-III in Figure 1.

It is to be understood that the vertical rolls I shown by the drawing constitute a stand of edging rolls which, in conjunction with tandem stands of horizontal rolls, gradually work hot metal, such as steel, into long fiat lengths. The function of these vertical rolls is to roll properly shaped edges on the work.

The work 2 is guided to and from the stand of vertical rolls I by guide boxes 3. The housings for the rolls I and the mountings for the guide boxes 3 are not shown in the drawing, in the interests of simplifying the disclosure.

The vertical rolls I are grooved to form the edging pass. Ordinarily, these grooves have a thickness very .closely approximating the thickness of the work, and their cylindrical bottoms and side walls provide uninterrupted surfaces. If the work completely fills such grooves rapid roll wear occurs, so the rolling is generally conducted so that the work is somewhat thinner than the groove widths, this resulting in the corners of the grooves being under-filled and causing round-edged work, which is undesirable. Furthermore,-these grooves can accommodate a very limited range of work thickness, whereby it is necessary to augment the roll inventory, which is economically undesirable.

According to the present invention, at least one set of the side walls of the grooves 4 are undercut as at 5, the cylindrical bottoms of the grooves 4 being tapered toward the undercuts so as to cause the work to bear against the undercut side walls. Furthermore, the grooves 4 are made 66 sufficiently wide to accommodate all the work thicknesses that can be rolled onthe mill of which the rolls I form a part. Instead of tapering the bottoms of the grooves 4, these bottoms may be made cylindrical and the guide boxes 3 adjusted to guide the work against the undercut 5 side walls. However, it is considered preferable to taper the bottoms in the'manner illustrated by the drawing and previously mentioned.

The drawing illustrates the rolls I as each providing two grooves. In the case of the bottom set 10 of grooves, it is not necessary to provide bottom side walls. The simplest form of the invention might be said to consist of vertical rolls providing cylindrical surfaces each provided with but one side wall which is undercut adjacent these cylin- 16 drical surfaces, it being remembered that tapered surfaces are considered preferable to cylindrical surfaces since the tapered form would cause the work to bear against the side walls without the aid of guides. 20

When the side walls are undercut at the bottoms of the grooves, or at the rolling surfaces in case the rolls have no other side walls, the work may be completely edged without fear of rapid roll wear because the undercuts can fill as much 25 as is reasonably desirable. In other words, normal edging reductions will never be sufiicient to cause the undercuts to completely fill, these undercuts serving as clearance for the corners of the work. Only the edges of the work are worked, 30 the faces of the work being .untouched adjacent its edges. Due to the great widths of the grooves no trouble is to be expected in forming the corners of the work opposite the undercuts in the grooved side walls. A further advantage in the 35 use of grooves of such widths, or of grooves which are not real grooves but have, in each instance, but one side wall, is the ability to accommodate a very great range of work thickness without the necessity of roll changes. 40

I claim:

1. An edging roll stand for flat work and the like, including rolls providing rolling surfaces for the edges of the work and side walls for engaging one side of the work, said .walls being circumfer- 45 entially undercut at their junctions with said surfaces to provide clearance for the corners of the work and said surfaces having sufficient Widths to permit rolling of work of different thicknesses, adjustable guide means being pro- 50 vided to guide the work against said walls.

2. An edging roll stand for fiat work and the like, including rolls providing rolling surfaces for the edges of the work and side. walls for engaging the sides of the work, said Wall's being circum- 10 for the corners of the work and said surfaces tapering toward said walls to cause the work to bear against the latter.

4. An edging roll stand for flat work and the like, including rolls providing rolling surfaces for the edges of the work and side walls for engaging one side of the work, said walls being circumferentially undercut in angular directions at their junctions with said surfaces to provide clearance for the corners of the work and said surfaces tapering toward said walls to cause the work to bear against the latter, said surfaces having sufficient widths to permit rolling work of different 1 thicknesses.

HOWARD D. COOK.

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