US2370984A

US2370984A - Rolling mill

Info

Publication number: US2370984A
Application number: US512583A
Authority: US
Inventors: Morgan Myles
Original assignee: Morgan Construction Co
Current assignee: Siemens Industry Inc
Priority date: 1943-12-02
Filing date: 1943-12-02
Publication date: 1945-03-06
Anticipated expiration: 1962-03-06

Description

M. MORGAN ROLLING MILL March 6, 1945.

MLEs MOEGAN Filed Dec. 2, 1945 mm-Sr orrica I.

ROLLING Myles Morgan, Worcester, I Masa, assigncr to Morgan Construction .Company, Worcester,

Mass, a corporation of Massachusetts Application December 2, 1943, Serial No. 512,583

chant bars.

Merchant mills ordinarily include a plurality of roll stands or passes through which the stock travels successively, some of these stands being juxtaposed for continuous operation and others being arranged. to form open passes through which the stock runs freely without tension. Between certain of the roll stands it is a common practice to provide Y-transfer conveying mechanisms of well-known construction, each of these mechanisms serving to receive the stock from.

one roll stand, to reverse the direction of travel of the stock, and to deliver it to a following roll stand. The path along which the stock is dellvered by such a Y-transfer mechanism lies at an acute angle with the path along which the stock is received. Each roll stand is provided with a receiving guide and a delivery guide located close to the rolls and on opposite sides thereof to direct the stock through the rolls in a path at right angles with the roll axes. However, with merchant mills as heretofore constructed, the stock has been compelled to leave the delivery guide and enter the Y-transfer mechanism along a path diverging angularly from its path through the rolls. This has caused a lateral pressure against the guide, resulting in rapid wear of the guide and scratching of the stock. Upon leaving the last roll stand the stock is delivered to a-cooling bed, and with certain prior mill constructions it has been found necessary to extend the Y-transfer mechanism underneath the cooling bed in order to avoid interference therewith. This is undesirable from the viewpoint of accessibility and for various other reasons.

It is accordingly one object of the invention to provide a rolling mill having roll stands connected by a Y-transfer conveying mechanism so constructed and arranged as to avoid lateral pressure against the guides.

It is a further object of the invention to provide a rolling mill having roll stands and associated Y-transfer conveying mechanism so constructed and arranged that in approaching and leaving each roll stand the stock will travel in a straight line at rightangles with the roll axes.

It is a further object. of the invention to provide a rolling mill having roll stands, a Y-transfer conveying mechanism and a cooling bed in a compact and efllclent arrangement such that interference between the cooling "bed and the said Y-transfer conveyingmechanism is avoided. With these and other objects in view, as will be apparent to those skilled in the art, the in vention resides in the combinationoi parts set forth in the specification and covered by the claims appended hereto.

Referring to the drawing illustrating one embodiment of. the invention and in which like refence numerals indicate like parts, the single figure is a somewhat diagrammatic plan view of a rolling mill.

The embodiment illustrated comprises a roughing mill l0 to which heated bars or billets are delivered by a roller-table ll, as indicated by the arrow A. This particular mill has eight stands of horizontal rolls, juxtaposed for continuous operation. The first four or these roll stands are driven in groups of two by two variable speed electric motors l2, while each of the remaining stands is driven by a separate variable speed electric motor 14. Upon leaving the roughing mill II) the stock is received by a Y- transfer conveying mechanism I5 of any suitable and well-known construction, the mechanism illustrated being provided with the usual skewed reversible power-driven rollers It. This Y- transier mechanism is constructed. and arranged to receive the stock. along a line of travel indicated by the arrow- B and to deliver the stock in the reverse direction along a line of travel indicated by the arrow C, these lines being positioned at an acute angle to one another. The Y-transfer l5 serves to deliver the stock directly to a single horizontal roll stand l8 driven by a variable speed electric motor l9 and forming a free or open pass for the stock. Upon leaving the roll stand [8 the stock is received by a second Y-transfer conveying mechanism 20 similar to the mechanism l5 and having the usual skewed reversible power-driven rollers 2|. This Y -transfer mechanism 20 is constructed and arranged to receive the stock along a line of travel indicated by the arrow D and to deliver the stock in the reverse direction along a line of travel indicated by the arrow E, these lines being positioned at an acute angle to one another. The Y-transfer 20 serves to deliver the stock directly to a single horizontal roll stand 23 driven by a variable speed electric motor 24 and forming a second free or open pass for the stock. Upon leaving the roll stand 23 the stock is received by a roller table or run-out 25 which delivers the stock along the line indicated by the arrow F to a suitable cooling bed 2'! located between the cooling bed 21.

table 25 and the Y-transfer E5. The stock travels broadside across the cooling bed 21, as indicated by the arrows G, to a roller table 28 alon which it travels longitudinally, as indicated by the arrow H.

It will now be noted that the arrows A and B are directly aligned with the pass line of the mill l0, and thus define a. single line at right angles with the rolls of the said mill. The arrows C and D are directly aligned with the pass line of the roll stand "3, the roll axes being positioned at right angles with the common line indicated by these arrows. The arrows E and F are directly aligned with the pass line of the roll stand 23, and thus define. a single line at right angles with the rolls of the said stand. Furthermore the line iii-F is parallel with the line AB, the angle between the arrows B and C being equal to the angle between the arrows D and E. V

In the operation of the invention the stock will travel in a direct straight line A-B through the roughing mill l0, then after being reversed by the Y-transfer l5 itwill travel in a direct straight line 0-D through the roll stand l8. The direction of travel will again be reversed by the Y-transfer 20, which will deliver the stock for travel through the roll stand 23 in a direct straight line EF to the roller table 25 and the The stock thus follows a z-shaped path through the mill. There is no lateral bending of the stock at any of the roll stands and hence no. lateral pressure on the guides. Consequently the life of the guides will be prolonged and scratching of the stock will be minimized. By reason of the straight run out of the stock i'r'om the roughing mill Ill,

sufficient space is obtained for the cooling bed 2'! without interference with the Y-transfer l5.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A rolling mill comprising a Y-transf er conveying mechanism arranged to receive bars of stock along one line of travel and to deliver the bars along a line at an acute angle with the receiving line, and a separate stand of horizontal rolls to reduce the bars as they travel along each of said lines, the r0118 being positioned at right angles with the corresponding lines of travel.

2. A rolling mill comprising two Y-transier, conveying mechanisms each arranged to receive bars of stock along one line of travel and to deliver the bars along a line at an acute angle with the said receiving line, the receiving line of the second mechanism being in a common line with the delivery line of the first mechanism, and a stand of horizontal rolls arranged to reduce the bars as they travel from the first mechanism to the second mechanism, the rolls being at right angles with the said common line.

3. A rolling mill comprising conveying mechanism arranged to move bars of stock longitudinally and successively along three straight lines forming a substantially Z-shaped path, and a separate stand-of horizontal rolls to reduce the bars as they travel along each of said lines, the rolls being positioned at right angles with the corresponding lines of travel.

l 4.- A rolling mill comprising conveying mechanism arranged to move bars of stock longitudinally and successively along three straight lines forming a substantially Z-shaped path, the first and third of said lines being parallel, and a separate stand of horizontal rolls to reduce the bars as they travel along each of said lines, the rolls being positioned at right angles with the corresponding lines, of travel.

5. A rolling mill comprising two Y-transter conveying mechanisms each arranged to receive bars of stock along one line of travel and to deliver the bars along a, line at an acute angle with the said receiving line, the receiving line of the second mechanism being in a common line with the delivery line of the first mechanism, a stand of horizontal rolls to reduce the bars as they approach the first mechanism with the rolls at right angles with the receiving line of the first mechanism, a stand of horizontal rolls to reduce the bars as they travel from the first mechanism to the second mechanism with the rolls at right angles with the said common line, and a stand of horizontal rolls to reduce the bars as they leave the second mechanism with the rolls at right angles with the delivery line or the second mechanism.

- 6. A rolling mill comprising two Y-transter conveying mechanisms arranged to move bars of stock longitudinally and successively along three straight lines forming a substantially Z-shaped path, separate stands of horizontal rolls to reduce the bars as they approach the first mechanism, as they travel from the first mechanism to the second mechanism, and as they leave the second mechanism, the rolls of each stand being positioned at right angles with the corresponding line of travel, a run-out to receive the bars as they-leave the last stand of rolls, and a cooling bed to receive the bars broadside from the run-out and located between the run-out and the first mechanism. I

MYLES MORGAN.