US1348230A - Mill-train for the manufacture of small and medium iron bars - Google Patents

Description

R. LINARD.

MILL TRAIN FOR THE MANUFACTURE OF SMALL AND MEDIUM IRON BARS.

APPLICATION FILED MAR. 22, I919.

Patented Aug. 3, 1920.

UNITED STATES PATENT OFFICE.

RAYMOND LINARD, or ouennn, BELGIUM.

MILL-TRAIN FOR THE MANUFACTURE OF SMALL AND MEDIUM IRON BARS.

Specification of Letters Patent.

Application filed March 22, 1919. Serial No. 284,386.

To all whom it may concern:

Be it known that I, RAYMOND LINARD, manufacturer, a subject of the King of Belgium, and resident of Ougre, in the Kingdom of Belgium, have invented certain new and useful Improvements in or Connected with Mill-Trains for the Manufacture of Small and Medium Iron Bars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which .it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked therein, which form a part of this specification.

The present invention relates to a mill train for small and medium bars. It is similar to what is called the continuous system and comprises the main advantages thereof but at the same time avoids the essential disadvantages of this system, which are that of being very expensive to install and that of only giving high efficiency for very large productions. Furthermore in continuous rolling mills the time necessary for changing the rollers for the purpose of rolling a different section is comparatively great, and this operation necessitates the stoppage of the entire plant.

The present invention, which relates to what may be called a semi-continuous train, obviates these various disadvantages.

These results are obtained by only utilizing the principle of absolute continuity for two consecutive rollers and by arranging between each pair of housings of the kind either a mechanical transporter or a man whose duty it is to insert the bar into the following rollers.

In particular the train as a Whole may comprise a pair of roughing rollers working continuously, two pairs of intermediate rollers each working continuously, these rollers being actuated by one and the same motor, and finally a group of finishing rollers working continuously and actuated by a second motor.

The present invention also provides means, in the device specified above, enabling a change to be made from the rolling of one section to that of another, without any interruption of the work,

With this end in view two groups of finishing rollers may be installed instead of one, one of the groups being arranged in such a way as to be actuated at will by one or the other of two motors.

In one particularly advantageous constructional form of the invention, with a view to being able also to change the section of the rollers of the second pair of intermediate rollers without stopping the work, this pair may be duplicated bya new pair of intermediate rollers actuated by the same shafts.

In this way it is possible to change very easily the section of the rollers of the pair of new rollers by unclutching it from the driving shafts, even while the other pair of intermediate rollers is at work.

Other advantages will be seen from the explanation given hereunder, which relates to the accompanying drawing which repre sents diagrammatically a rolling mill according to the invention.

In a rolling mill illustrated the necessary. difference in speed between each of the rollers of the two-high pairs working continuously is brought about in a known manner because the diameters of the rollers of these rollers are different.

The plant comprises two motors 11 and 12. The motor 11 drives the pair of roughing rollers 1 and 2 and the shafts 13 and M which actuate, by means of sets of pinions 19 and 20, the pairs of intermediate rollers 4 and 3, 5 and 6, 5 and 6. The motor 12 drives the shafts 15, 16 and 17, which drives the finishing rollers 7, 8 and 9.

It is to be observed that the shaft 15 which drives the finishing roller 7, is arranged with respect to the shaft 14 which drives the intermediate rollers 3, 6 and 6", in such a way that a finishing roller 7 can be driven at will by either one or the other of these shafts.

Without afiecting the section of any roller, it is possible to obtain by means of the arrangement illustrated, products rolled with two different sections, according to the path-they have been made to traverse; in point of fact they may be made to pass either through the rollers 1, 2, 3, 4;, 5, 6, 7 8 and 9 or else through the rollers 1, 2, 3, 4,5,6and7'.

In all cases the bars are inserted into the two-high roller 1 and pass directly to the two-high roller 2. The bar leaving the roller 2 is engaged by means of a mechanical conveyer 10, in the roller 3, whence it passes Patented Aug. 3, 1920.

threes. Upon leaving the twin roller 6 the bar is received by a mill hand located at 21, who engages it in a continuous rolling unit consisting of three rollers, 7, 8 and 9.

If it is desired to roll the other section, the workman located at 18, after receiving the bar leaving the roller 4, inserts it into the roller 5 instead of inserting it into the roller 5. From there the bar passes directly into the roller 6. Upon leaving the latter it .is inserted by the workman located at 21 in thefinishing rollers 7 driven either by the shaft 14 or by the shaft 15.

It is obvious that if the production of the roller 4 is sufficient, bars may be inserted alternately in the rollers 5 and 5, so that this mill train. can roll two different sections at the same time.

If it is desired to change the section of the rollers of the rollers 7 all that is necessary, in order to stop this pair, while the work of rolling goes on following the course through the rollers 1, 2, 3, 4, 5, 6,7, 8 and 9, is to unclutch the rollers 7 from the shaft 14 or 15.

During. this operation, rolling can still take place through the rollers 1, 2, 3, 4, 5', 6', 7., 8 and 9;

On the other hand, when the course followed is through the rollers 1, 2, 3, 4, 5,6, 7 8 and 9 it will be seen that by unclutching t e rollers 5, 6 and 7 the sections of their rollers can be changed at the same time.

Ifit is desired to change the section of the rollers of the roller 7, and consequently that of the rollers of the rollers 8 and 9, all that is necessary is to stop the motor 12, render the roller 7 independent of the roller 7 unclutch-the said roller 7 from the shaft 14 and make the bar follow the rolling course through the rollers 1, 2, 3,4, 5', 6 and 7 or else through the rollers 1, 2, 3, 4, 5, 6 and 7 It will be seen from the above that since the sections of the rollers of the rollers 5 and 6 cannot be changed except by stopping the work of rolling they should be so chosen as only to necessitate very rare changing.

On the other hand the section of the rollers of the rollers 5' and 6 may be changed frequently without any inconvenience. It willtherefore be these rollers that will be utilized for the rolling of fiats'or angle IIOIIS.

The sections of the rollers of the rollers 7 7, 8 and 9 may be arranged as desired. It is however to be noted that in the majority of plants the course through the rollers 1, 2, 3, 4, 5, 6, 7, 8 and 9 may be arranged in such a way asto correspond with the current section, while the course through the rollers 1, 2, 3, 4, 5, 6 and 7' may correspond with the sections that frequently vary.

It will be seen that this system of mill train only' necessitates two workmen, viz: one located at 18 and another at 21, itbeing understood that the insertion of the bars is eflected mechanically.

What I claim is:

1. A semi-continuous mill train comprising two motors, roughing rollers and intermediate rollers actuated by one of said motors, two groups of finishing rollers actuated by the second motor, one of these groups so arranged as to admit of being actuated also by the first motor.

2. A semi-continuous mill train comprising two motors, two two-high sets of roughing rollers and two pairs of intermediate rollers actuated by one of said motors, said rollers working continuously, a conveyer f for bringing the roughed bar to the first pair of intermediate rollers, and two groups of finishing rollers actuated by the second motor, one of these groups being so arranged as to admit of being also alternately actuated by the first motor.

3. A semi-continuous mill train comprising two motors, two, two-high sets of roughing rollers and a first and second pair of intermediate rollers actuated by one of said motors, all said rollers working continuously, a conveyer for bringing the roughed bar to the first pair of intermediate rollers, another pair of intermediate rollersduplieating the aforesaid second pair of intermediate rollers, two groups of finishing rollers actuated by the second motor, one of these groups being so arranged as to admit of being also alternately actuated by the first motor.

In testimony whereof I aifix my signature in presence of two witnesses.

RAYMOND LINARD. Witnesses:

LEONARD LEVEE, GEORGES VANDER HAEGHEN.

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