US499545A

US499545A - Hezekiah hewitt

Info

Publication number: US499545A
Authority: US
Publication date: 1893-06-13
Anticipated expiration: 1910-06-13

Description

H. HEWITT. MACHINERY FOR ROLLING METALS.

No. 499,545. Patented June 13, 1893.

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jnwnlor I UNITED STATES PATENT OFFICE.

HEZEKIAH HEWITT, OF BIRMINGHAM, ENGLAND.

MACHINERY FOR ROLLING METALS.

SPECIFICATION forming part of Letters Patent No. 499,545, dated June 13, 1893. Application filed October 13, 1892. Serial No. 448,728. (No model.)

To all whom it may concern.-

Be it known that I, HEZEKIAH HEWITT, a subject of the Queen of Great Britain, residing at Birmingham, England, have invented certain new and useful Improvements in Machinery for Rolling Metals and Metallic Alloys; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention consists of the arrangements or combinations of the parts of rolling machin ery hereinafter described for finishing sheets or strips roughly reduced in the break down rolls or otherwise, to the required thickness.

The object of my invention is to facilitate the rolling of the sheet or strip so that the attendant at the front of the rolls can feed the sheet into the rolls and receive the rolled or finished or partly finished sheet at the said front of the rolls. I arrange in the same frame, preferably, three pairs of parallel cylindrical rolls of the same diameter but at different levels. The first and second pairs of rolls are on the same or nearly the same level and the third pair of rolls situated between the first and second pairs is at a higher level than the other pairs, the top roll of the third or middle pair being situated at about the same level as the bottom rolls of the first and second pairs. Between the first and second pairs of rolls is a platform for guiding the sheet as it emerges from the first pair of rolls into the second pair of rolls; and at the back of the second pair of rolls is a curved guide for guiding the sheet around the top roll of the second pair to the third pair of rolls, a guide or platform being also situated between the second and third pairs of rolls to guide the sheet to the said third pair of rolls. The first and second pairs of rolls rotate in the same direction for'carrying forward the sheet, while the third pair of rolls rotates in the opposite direction for giving the back or return motion to the sheet under operation. The sheet may be first passed through the front end pair of rolls at the lower level or first through the middle pair of rolls at the higher level but I prefer to first pass the sheet through the front pair at the lower level. The workman standing in front of the first pair of rolls passes the sheet between them. The reduced sheet emerging from the first pair of rolls travels along a platform and passes between the second pairof rolls by which it is further reduced in thickness. On emerging from the second pair of rolls it is guided by the guides described to the third pair of rolls by which it is further reduced in thickness and a back or return motion given to it to convey it to the workman at the front of the rolls.

Instead of using the three pairs of rolls described, the first and second pairs only may be employed. In this case the sheet after it leaves the second pair of rolls is delivered to the workman at the front of the rolls, the second pair of rolls having a motion the reverse of that of the first pair of rolls.

I will now proceed to describe with reference to the accompanying drawings the manner in which my invention is to be performed.

Figure 1 represents in end elevation,partly in vertical section; rolling machinery constructed according to my invention in which three pairs of rolls are employed and Figs. 2 and 3 represent elevations of rolling machinery in which two pairs of rolls are employed.

I will first describe the arrangement Fig. 1. a, a; b, b and c, c are the three pairs of cylindrical parallel rolls between which the sheet or strip to be reduced in thickness is passed in succession and fed automatically from one pair of rolls to the next pair and through the series. The said three pairs of'rolls are supported in the same pair of housings d, d. The first pair of rolls is marked a, a; the second pair, on the same or nearly the same level, is marked 12, b, and the third and higher pair of rolls is marked 0, c. The first andsec- 0nd pairs of rolls a a and b b on the same level rotate in the direction proper to carry forward the sheet or strip to be rolled through the said first and second pairs, and the third and middle pair of rolls 0, c rotates in the reverse direction or in the direction proper to return the partially rolled sheet or strip to the workman at the front of the rolls. The

directions in which the three pairs of rolls rotate are indicated by the arrows near the said rolls and the direction in which it is preferred to pass the sheet or strip marked 6 through the three pairs of rolls is indicated by arrows. In front of the first pair of rolls a, a is a guide f for guiding the sheet or strip to the said first pair of rolls; and between the first and second pairs of rolls a, a and b, b is a platform 9 and guides h, h for receiving and guiding the sheet or strip from the first pair of rolls a, a to the second pair of rolls 6, b. At the back of the higher roll of the second pair 6, b and between that pair and the middle pair of rolls 0, c is a curved guide t for guiding the sheet or strip in a return or reverse direction to the said third pair of rolls by which third pair of rolls the strip or sheet is operated upon and traveling on the platform It at the front of the said pair of rolls 0, c is delivered to the workman at the front of the rolls. The several pairs of rolls are capable of independent adjustment by the adjusting screws 1, Z and their sliding blocks or bearings as usual and the two pairs of rolls a a and b, b are rotated in the direction to give the advance motion to the sheet or strip and the pair of rolls 0 c rotated in thereverse direction for returning the sheet or strip to the workman by gearing of the ordinary kind.

The action of the rolling machinery is as followsz-The workman standing at the front of the rolls marked P passes the sheet or strip to be reduced through the guide f and be tween the first pair of rolls a, a. The reduced sheet or strip emerging from the said first pair of rolls is by their action made to travel on the platform g and between the guides h, h and is delivered between the second pair of rolls 1), b by which it is further reduced in thickness. On emerging from the second pair of rolls 1), b the sheet or strip is guided by the curved guide 1l,t't0 the third pair of rolls 0, c'by which it is further reduced and a back or return motion given to it to return it to the workman at the front P of the rolls as indicated by the arrows. The sheet or strip is passed as many times as is required through the sets of rolls described and represented to reduce the sheet or strip to the required thickness. During the rolling operation the rolls are adjusted from time to time by the adjusting screws Z, Z as is well understood; and the sheet or strip is annealed as often as the metal or alloy being operated upon requires. Although I prefer to pass the sheet or strip first through the lower pairs of rolls a, a and b b and return it through the higher pair of

rolls

0, 0 yet the direction of the sheet or strip through the rolls may be reversed by modifying the gearing and guides; that is to say, the sheet or strip may be first passed through the upper or middle pair of rollsc, c and returned through the lower pairs of rolls b b and a a, to the workman in front of the rolls.

Fig. 2 represents in end elevation, partly in vertical section and Fig. 3 in front elevation rolling machinery constructed according to my invention in which two pairs of rolls at different levels are employed. In this arrangement the first or lower pair of rolls is marked m, m and the higher pair of rolls is marked n, n the two pairs of rolls rotating in opposite directions; that is, the rolls of the first pair m, m rotate in the direction proper to give the advance motion to the sheet or strip and the rolls of the second pair n, n rotate in the direction proper to give the return motion to the sheet or strip as indicated by the arrows. The sheet or strip being rolled is marked q; the front guide is marked f, and the curved end guide, between the two pairs of rolls is marked t'. The return platform in front of the second or return pair of rolls is marked 76, Z Z are the adjusting screws and d d are the housings carrying the rolls. The workman stands at the front P of the rolls to feed the strip or sheet to and receive the rolled strip or sheet from the rolls. The action of this arrangement is the same as that first described, the sheet or strip being passed through two pairs of rolls instead of through three pairs of rolls. Three or more pairs of rolls at the level ofthe pair of rolls m, m Figs. 2 and 3 and the pairs of rolls a,a and b, b Fig. 1 maybe employed; andinstead Of a single pair of rolls at the higher level, two or more pairs at the level of the said single pair may be employed.

The. several pairs of rolls may be of varying diameters or made to rotate at diiferent speeds in order to compensate for the increasing length of the sheets or strips as they pass through the several pairs of rolls.

Having now particularly described and ascertained the nature of my invention and the manner in which the same is to be performed, I declare that I claim 1. In a machine for reducing the thickness of flattened metal sheets or strips, the combination of pairs of rollers, one of which pairs is arranged at a higher level than another pair, adjusting devices for adjusting the upper roll of each pair of rolls, driving mechanism for rotating the rolls, the curved end guide 2', the front guide f, and the return platform It, substantially as described.

2. In a machine for reducing the thickness of flattened metal sheets or strips, the combination of the two pairs of rolls a and 1) arranged on the same level and rotating in the same direction, the pair of rolls 0 arranged at a higher level at a point centrally between said two pairs of rolls and rotating in a direction opposite the same, the curved end guide 1', the front guide f, the guides g, h located between the pairs of rolls a b, and the return platform extending from the roll I) to the roll 0, substantially as described.

l-TEZEKIAH HEWITT. LL. S.]

Witnesses:

RICHARD SKERRETT, ARTHUR JOHN POWELL.