US1753268A - Rolling mill - Google Patents

Description

April 8, 1930. L. JOHNSON ROLLING MILL Filed July 21, 1928 INVENTOR Patented Apr. 8, 1930 UNITED STATES PATENT oFF- ca F LANE'JOHNSON, OF INGRAM, PENNSYLVANIA, ASSIGNOR TO UNITED ENGINEERINGEE FOUNDRY COMPANY, OF PITTSBURGH, PENNSYLVANIA,- A CGRIPOIRA'l'IO-N OF'PENN SYLVANIA.

ROLLING MILL This invention relates to rolling mills, and is particularly useful in the rolling of material which it is desired to finish at a low rolling temperature. Certain strip product, such as that used for tight cooperage, must have a relatively high elastic limit and this is obtained by finishing at a low rolling tempera ture. The lengths of material handled are so great that it is impracticable to roll the same with a continuous mill because there is not sufficient room to set the material aside to cool before passing through the finishing stand. Various schemes, such as placing different mills out of alignment with one another, have been proposed, but these are not ordinarily satisfactory because the flexibility of the unit is reduced. At times it is desired to use the same equipment for rolling without any time lapse between stands and in such case it is desirable to have all the mills in line with one another so that they may be used as a continuous mill installation.

I provide a travelling receiving support arranged to receive the material as it issues from one millstand and carry it to the next millstand. A vibrator is preferably employed so that the material is looped on the support. It is important that the several loops be kept out of engagement with one another as they have an eflect upon the cooling if they are in contact, and'anon-uniform product results. Another disadvantage of the oldarrangements is that the successive pieces of material are likely to adversely affect one another during cooling.

The looped material is carried by the travelling support toward the finishing millstands and the time of travel is made adj ustable so that the desired temperature reduction may be had before the final rolling.

The support is preferably in the form of a table conveyor and provision is made for moving this conveyor out of alignment with the mills so that a run-way trough may be placed between the stands, thus making it possible to use the millstands as a continuous mill.

The accompanying figure of drawing illustrates more or less diagrammatically the present preferred.embodiment of my invention.

In the drawing there is shown a series of millstandsQ and edgers 3 for the hot rolling of a'strip. The direction of rolling isindicated by an arrow A. I Asthe material issues from thelast stand of-rolls it passes through a vibrator 4 which alternately directs. it to one side or the other of a travelling chain table conveyor 5. Such vibrators-aremwell known and need not be specifically described. The material is caused to lie in loops L on the chain table 5, these loops being out of contact with one another so that the desired cooling effect is obtained. The top surface of the table support 5 moves in the direction of the arrow B so that the looped material is carried toward the first stand of a series of finishing rolls 6. The speed at which the support 5 moves is determined'by a rheostat 7 controlling the motor 8 which drives the table through gearing 9. By changing the speed of the motor the length of time which the looped material lies on the support 5 may be varied. When it reaches the finishing mill 6 it is entered and is rolled thereby The temperature may be adjusted to a nicety by at the desired reduced temperature.

varying the length of time spent in travelling over the conveyor.

The material, after rolling in the finishing mill 6, is delivered to a run-out trough 10 from which it passes to a cooling bed 11.

The conveyor table is mounted on track wheels 12 running on tracks 13 so that the entire table may be moved to the right or to the left as viewed in the drawing. A runout trough 14 is carried by the table and may be placed between the mills 2 and 6. It will be noted that the mills 2 and 6 are in alignment so when the run-out trough 14: is in position the unit may be operated as a continuous mill.

I have illustrated and described the present preferred embodiment of my invention, but it will be understood that the invention is not limited to this form alone, as it may be otherwise embodied withinv the scope of the following claims.

I claim? 1. In combination with spaced-apart mill stands arranged in alinement, a traveling support between the mill stands, the support being movable out of the path of the material issuing for one of the mill stands, and a run-out trough adapted to lie between said mill stands and extend from one to the other thereof, the run-out trough being movable into alinement with the mill stands substantially simultaneously with the movement of the traveling support out of alinement therewith.

2. In combination with spaced apart millstands arranged in alignment, a travelling support between the millstands, means whereby the support may be moved out of the path of material issuing from one of the millstands, and a run-out trough movable into alignment with the millstands, the run-out trough being carried by the support and movable into alignment with the millstands when the support is moved from its position therebetween.

In testimony whereof I have hereunto set my hand.

LANE JOHNSON.

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