US2878918A - Rolling mill transfer - Google Patents

Description

March 24, 1959 E. T. PETERsoN ROLLING Mm. TRANSFER Filed Jan. 5, 1955 ve *from i United 2 Claims. (Cl. 1984-20) The present invention relates to transfers for rolling tes PatentX- O 2,878,918 Patented Mar. 24, 1959 mill stand as the bar approaches the succeeding mill stand. One disadvantage of the skew table is that the work must travel a considerable distance in order to excessive wear on the table rollers at the side guard, but

mills and particularly to transfer tables which receive f the work from one rolling mill pass and carry it across the table and return it to the next rolling mill pass.-

A purpose of the invention is to transfer the work from one rolling mill pass to another by a single table, with"y a minimum of required length of travel of the work.

A further purpose is to transfer the bar from one roll stand to .another without causing the work to rotate on the transfer before it enters the bar turner, so that the bar can be returned to the next pass and will enter without difficulty into mill guides or into a bar turner as the case may be.

`A further purpose is to minimize wear on the transfer table rollers at the guards.

A further purpose is to eliminate the need for skew rollers and for chain transfers.

A further purpose is to make the side guard sweep from a diagonal position in which it receives the incoming work from one roll stand to a longitudinal position at which it delivers the work to the next roll stand, de-

sirably accomplishing the sweeping action by pivoting the side guard at the end remote from the active end.

Further purposes appear in the specification and in the claims.

In the drawings I have chosen to illustrate one only of the numerous embodiments in which my invention may appear, selecting the form shown from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

Figure 1 is a fragmentary top plan view showing a transfer in accordance with the invention, and illustrating also cooperating roll stands.

Figure 2 is a fragmentary section of Figure 1 on the line 2 2.

Describing in illustration but not in limitation and referring to the drawings:

In many rolling mill arrangements, the bar or the like which passes through one roll stand, and is referred to generally herein as the work, is received on a transfer and carried laterally to a position in line with the next roll stand, and then carried, usually in the reverse direction, into the next roll stand.

One type of conventional transfer, of the character for example shown in Morgan U.S. Patent 2,392,334, employs a lateral chain transfer to carry the work across from a run-out table of the previous roll stand to a run-in table connecting with the succeeding roll stand. A device of this character is quite expensive because it necessitates two complete mill tables, as well as a complicated chain transfer mechanism.

Eiforts have been made to accomplish the transfer by a single table, and for this purpose a skew table has been developed as illustrated in Morgan U.S. Patent 2,340,984. In this character of table the skewed angle of the rollers causes the work to travel from the line of discharge of the previous mill to the line of entry to the following also makes it diflicult to align the work at a particular angular position on its longitudinal axis so that it can enter the mill guides or the bar turner for the next pass.I

I have discovered that this diiculty can largely be overcome, while still retaining the advantage of using a single table rather than requiring two tables and a chain transfer. In accordance with the invention, the work travels on a straight transfer table, but one end is deected and then the'work is transferred laterally by the sweep or swinging action of .a side guard. First the work running out of the previous roll stand is deected by the sweep side guard to the line of the next succeeding roll stand at the forward moving end of the bar. Then the end of the work which last left the previous roll stand is transferred by the sweeping action to the the center line 24 of the next roll stand 25 as the workA moves forward. i

The transfer desirably includes a set of transfer rollers 26 which are suitably arranged with the axes generally in the same horizontal plane and which individually extend transverse to the mill roll pass center lines.

The respective table rollers 26 are mounted on suitable bearings, not shown, and are driven in reversible direction as by shaft 27 extending longitudinally along one side of the transfer, driven by motor 28, speed reducer 30 and gear box 31. The shaft is made up of several shaft units joumalled on bearings 32 and joined by couplings 33. Any suitable gearing connects the rollers with the shaft, here shown as a bevelled gear 34 on the shaft at each roller position and a cooperating bevel gear 35 on the end of the roller within a gear box 36.

The table rollers are separated by apron horizontal plates 37 which assist in defining the surface of the table.

The table at the active end has in line with the retracted side guard 23 a stationary inlet guiding side guard 38 which like the side guard 23 extends diagonally suitably at an angle of less than 30 to the center line of the mill roll stands. The diagonal position of the side guard 23 makes it unnecessary to have the table rollers of as great length at positions remote from the active end, and the table rollers diminish until at position 40 a uniform narrow table shape is reached which is defined at the inlet side by a fixed longitudinally extending side guard 41.

At the outgoing side the table is provided with a fixed longitudinally extending side guard 42, and at the outlet end has a deector plate 43 pivoted at 44 and adjusted by an adjustable fastening 4S to provide the correct angle for entrance into a bar turner 46 of the character of that shown in Peterson U.S. Patent 2,632,346, granted March 24, 1953, for Bar Turning Device which is positioned in line with the next roll stand 25. It will be evident that the decctor plate and the bar turner will move to approach the mill rolls from the correct position.

The action of the side guard 23 in sweeping across the transfer table may be accomplished by any suitable mechanism. In the form shown, the side guard 23 at the inactive end is pivoted on a vertical pivot 47 and at a position between its ends it pivotally connectsy at 48 with a connecting rod 50 pivotally mounted at 51 on a crank S2 which extends from a turn-table 53 on a vertical axis driven by a gear box 54 which in turn is driven by an electric motor 55.

In operation the work enters the transfer from roll stand at the left in Figure 1 and is deflected diagonally along the sweep side guard 23 until thc forward end reaches a position substantially in line with the next roll pass 2S. When the work is all on the transfer, the operator operates the driving mechanism to cause the sweep side guard 23 to sweep across to the dot-and-dash position shown in Figure 1, thus lining up the work with the roll stand 2S. The transfer table rollers which were previously rotated to Withdraw the work from roll stand 20 are now reversed and the work is carried into'bar turner 46 or directly into the guides of the roll stand 25.

One of the advantages of the invention is that the work rests quietly on the transfer and does not have any substantial tendency to rotate so that the work can easily be brought into proper relation with the bar turner or the mill guides, and if it is not in the proper relation the relation can readily be adjusted by the operator without having the position change due to the effect of skew rollers.

The device is relatively inexpensive to construct as compared with previous equipment, and is reliable and effective in service.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benets of my invention without copying the structure shown, and I, therefore, claim al1 such insofar as they fall within the reasonable spirit and scope of my claims.

vnew and desire to secure by Letters Patent is:

1. In a rolling mill transfer, a transfer table having a set of table rollers arranged in spaced parallel relationship and extending across from one side to the other of the table, reversible means for driving the table rollers, the table at its active end having an inlet area at one side and an outlet area at the other side, a side guard having one position diagonally disposed with respect to the table rollers, at which one position the active end of the side guard is located adjacent the inlet area, the forward end of the work striking the side guard in this position and being delected toward the opposite side of the table, the side guard being movable across the table rollers to a position adjacent the outlet area at the opposite side, and means for swinging the side guard across the table from a position adjoining the inlet area to a position adjoining the outlet area, the active end of the side guard moving farther than the opposite end and the side guard by its motion across the table carrying the work from the inlet area to the outlet area.

2. A transfer of claim 1, in which said means cornprises a vertical pivot for the side guard at the end remote from the active end, and mechanism for swinging the side guard about its pivot.

References Cited in the le of this patent UNITED STATES PATENTS 284,700 Williams Sept. 11, 1883 1,960,307 Fisk May 29, 1934 2,072,121 Montgomery Mar. 2, 1937 2,392,334 Morgan Jan. 8, 1946 2,416,690 Hardy Mar. 4, 1947 2,632,346 Peterson Mar. 24, 1953 2,741,212 Hayes Apr. 10, 1956 2,796,163 Hans-Peter Lemm June 18, 1957 FOREIGN PATENTS 801,505 Germany Jan. 8, 1951

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