US39960A - Improvement in rolling-mills - Google Patents

Description

l l 2 Sheets-Sheet l.

'T. F. RUMBOLD.

Rolling Nlill.l

Patented sept. 15, 1863.

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l 2 Sheets-Sheet 2.' T. F. RUMBOLD.

n Rolling Mill. i No. 39,960. Patented Sept. 15,1863.

W/TNESSES.'

ATENT OFFICE.

T. F. RUMBOLD, OF ST. LOUIS, MISSOURI.

IMPROVEMENT IN ROLLING-MILLS.

Specification forming part of Letters Patent No. 39,960, dated September 15, 1863; antedated June 2, 1863.

.To all whom t may concern.:

Beit known that I, T. F. RUMBOLD, ofthe city and county of St. Louis, in the State of Missouri, have invented a new and useful Machine for Rolling Metalin a Regular or Irregular Form; and I do hereby declare that the following is aj'ull, clear, and eXact description of the construction and the operation of the same,reference being had to the accompanying drawings, constituting a part of this specication, in which- Figure I, Sheet- I, is a side or front view of the machine, adapted for rolling tapering bars or beams without a curve being imparted to them. Fig. 2 is atop view, and Fig. a transverse section, of the same. Fig. 4 is a modification of Fig. l plan. Fig. 5 is a modification vof the plans Figs. 1 and 4. Figs. 6 and 7 show two of the forms of iron that may be produced by the spiral mold-rollers.

Similar letters of reference in the several gures indicate correspond in gor similar parts.

The invention which I have developed consists in making rollers whose molds, instead of passing around like common rollers in a rin glike form, pass around in a spiral or screwlike form, thereby allowing the opportunity of gradually decreasing' or increasing the depth or width of said groove or mold to a much greater length than on common rollers.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

A B represents two rollers, constructed according to my invention, for rolling and tapering bars or beams, as shown in Fig. 6 (said figure being one of the many shapes that can be formed on this same principle, and will be used throughout this specification merely because it is convenient to illustrate the principle.) The rollers are iitted one above another in a rolling-mill frame or housing, C C, in any of the well-known ways, and are geared together, as atD D, so as to run at equal speeds. The circumference of the rollers have spiral or screw-like molds formed on them by cutting spiral grooves into the metal. On one roller this groove or mold turns from right to left and on the other from left to right. The

flanges of the upper or larger roller, which form a guard or guide as the iron is being rolled, match the grooves that are between the molds or working-surface of the lower or smaller roller, and are so arranged that when the two rollers are geared together they (the ilanges of the larger roller) extend into the grooves of the smaller roller to a greater or less extent, accordingly as the case may require; but in this respect the spiral-moldrollers do not differ from the common rollers that are found in rolling-mills. Itis evident that the mold thus formed is continuous from one end ofthe rollers to the other end, and as the flanges a b are right and left handed and their depth gradually increased on one in one direction and gradually decreased on the other in a reverse direction, the rollers, when in motion, present a continually-changing workingsurface, c d, giving the impress of the mold to the metal as it passes between them, thus imparting the tapered form to the beam or bar of iron.

In Fig. 2 I have illustrated by red lines the gradual changes made in a bar with all its sides parallel during the stage of its progress through the rolls. The bar, after being once introduced between the rolls, does not have to be removed and again inserted through another part of the same rollers, but being l -once introduced it follows laterally the screwl line of the mold, and at the same time feeds l longitudinally through the rollers, as illus- ,l trated in red. Although, as stated, it does l not have to be introduced a second time into the same rollers, yet the iron bar or beam will have to be inserted between different rollers, having different sized molds on them, until it is brought to the proper form 5 but in this re.

spect, also, the number of times the iron has to be passed between the rollers does not differ from the common mode ot' rolling metal.

The great idea of my invention is this: The molds are made to pass around my rollers in this screw-like form, giving a much longer changing workin g-surface than in the common rollers, whose molds only pass around once, allowing alterations only to the extent of the circumference of the same, whereas in the spiral molds modifications as to the depth or width can be made at any point of the whole length of said spiral mold, which pass several times around the rollers. The bars, when they are completed by the plans l, 2, and 3, are

Without a curved bend in them. They, hoW- l butit does produce a very essential effect upon ever, may require to be trued, unless fed through the rollersJ under a tension, as practiced in the rolling of polished shat'tin I have described the mold as being formed by cutting spiral grooves into the metal ot' the rollers; but it is obvious that they might be formed by constructing the spiraliianges sepai rate from the rollers, and afterward applying them tirmly on rollers of proper graduallyrising outline. It also is obvious that the shape or coniiguration ot' the dautres, molds, and rollers maybe altered so as to produce any ofthe known forms ot' beams or bars, as has been previously stated, without departing from the principle involved in the spiral-mold rollers.

ln Fig. 4 the molds are represented as being` much wider than the anges or spaces between them. With this formation broader bars or pieces oi' iron can be rolled than in the increasing' the pitch ot' the same and adding to its depth.

By examining Fig. 4 it will be seen that the Working-faces c d are parallel with the axis of the rollers, notwithstanding the tact that these g faces united form a conie roller, or, in other i end of the rollers to the other end of the same,

words, are formed on a conical foundation. This parallelism is necessary in order to roll the bars without a curve being imparted te them.

the rollers A 13. the result of the rollers, so far as reducing and tapering or otherwise shaping the iron goes,

This change does not aifect the form of the iron. It, by reason of the conical shape of each section of the Working-face ofthe mold, due to the angle given thereto, gradually bends the bar into the form illustrated by Fig. 7. The extent and character ot' the bend imparted to the iron is just in proportion to the degree of angle or inclination that the working-surface of the rollers differ from the een ter line or axis ofthe rollers, which degree of angle may be altered at pleasure and used along only a portion of the length of the rollers, in connection with the workingsurt'ace on the other portions,which are parallel with the axis of the rollers, or it may loe on the whole length ot the rollers, as represented. Now, with my invention, it' it is desired to roll tapered iron, or other metal of any form, whether square, flat, round, T-shaped, swelled, regular, irregular, tvc., either with or without a curved bend in it, it can be done by the employment of the spiral-mold rollers, the mold ot' said rollers being made the shape and size ot' the iron or other metal that is to be-rolled.

that I claim as my invention, and desire to secure by Letters Patent, is-

The forming ot the mold or working-surface around the rollers in spiral or screw-like form, making one continuous track from one so as to be the counterpart ot' the bar or beam that is desired to be rolled, substantially as set Jforth.

T. F. RUMB OLD.

Witnesses XVILLIAM RUMBOLD, C. Tn. UHLMANN.

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