US1519657A

US1519657A - Mill

Info

Publication number: US1519657A
Application number: US567281A
Authority: US
Inventors: Jr Florence C Biggert
Original assignee: United Engineering and Foundry Co
Current assignee: United Engineering and Foundry Co
Priority date: 1922-06-10
Filing date: 1922-06-10
Publication date: 1924-12-16
Anticipated expiration: 1941-12-16

Description

F. C. BIGGERT. JR

MILL

Filed June 10, 1922 5 Sheets-Sheet l I in' m??? @M M mm, M, 1924. 1,519,657 F. c. BIGGERT, JR

MILL

Filed June 10,1922 I 5 Sheets-Sheet 2' I CJ-IINYENTOIZZ 1/ "7 F. Q'BIGGERT. JR

MILL

Filed June 10 1922 3 Sheets-Sheet 5 INVENTOR Patented Dec. 16, 1924.

UNITED .s'rss AENT FFlCE.

FLORENCE C. BIGGERT, JR., 0F GRAFTON, PENNSYLVANIA, ASSIGNOR .TO UNITED ENGINEERING AND FOUNDRY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A

C'OBPOBATION OF PENNSYLVANIA.

MILL.

Application filed June 10, 1922. Serial No. 567,281.

To all whom it may concern:

Be it known that I, FLORENCE C. BIGGERT, Jr., a citizen of the United States, residing at Grafton, in the county of Allegheny and State of Pennsylvan a, have invented a new and useful Improvement in Mills, of which the following is a full, clear, and exact description.

My invention relates to mills and is applicable to any kind of mill having smooth rolls and to mills having certain forms of shaping rolls.

' My invention relates particularly to a method of and means for hydraulically supporting, cooling, lubricating and reinforcing the rolls of mills, and will be better understood by reading the following description taken in connection with the accompanying drawings illustrating one embodiment of my invention, and in which:

Figure 1 is a front elevation of a part of a mill embodying my invention;

Figure 2 is a section on line 11-11 of Figure 1;

Figure 3 is a top plan view of the cylinder and piston;

' Figure 4 is a bottom plan view of the piston, and

Figure 5 is a partial side elevation of the mill shownin Figures 1 and 2.

Referring to the drawings, the mill comprises the

usual housings

1 and 2 for the rolls and carries the

bearings

3, 4, 5 and 6 in which the rolls are mounted. The bearings 4 and 5 are held in place by the

screws

7 and 8, respectively. The parts so far described may be of any well known or desired construction. Mounted between and carried by the

housings

1 and 2 are two cylinders 9 and 10. These cylinders are provided with

pistons

11 and 12, respectively. The piston 11 engages the roll 13 and the piston 12 engages the roll 14. The

istons

11 and 12 are rovided with cham-

Eers

15 and 16, respectlvely, which communicate through the

passages

17 and 18 with the

interior portions

19 and 20 of the cylinders 9 and 10. Any suitable packing material 21 may be placed around the

pistons

11 and 12. The lower portions of the pistons are shaped to closely fit the surface of the rolls as shown in Figure 2 so that each of the

chambers

15 and 16 has one side constituted by the

rolls

13 and 14, respectively. The

pipes

22 and 23 communicate with fluid under pressure and conduct the same into the

chambers

19 and 20 and from these chambers into the

chambers

15 and 16 through the

passages

17 and 18. The areas of the

pistons

11 and 12 which are subjected to the pressures in the

chambers

19 and 20 are larger than the areas of the

chambers

15 and 16. These areas are so designed relative to each other that sufficient pressure will be created between the

edges

24 and 25 of the piston 11 and the

edges

26 and 27 of the piston 12 and the

rolls

13 and 14, respectively, to form a fairly tght joint so that suflicient pressure may be produced upon the fluid in the

chambers

15 and 16 to reinforce the rolls substantially throughout their length. The pressure created in the

chambers

15 and 16 directly upon the rolls 13 and 14: also act to relieve the necks of the rolls of considerable pressure. The contact of the fluid in these chambers with the rolls and the escape of a' relatively small amount of fluid between the rolls and the edges of the chambers act to effectively cool the rolls and to reduce the metallic friction between the rolls and the edges of the chambers or pistons by creating a sheet of fluid between the rolls and the edges of the pistons.

In mills of this character the lower rolls are usually fixed and springs or similar means are used to maintain the rolls separated when no work is in the mill.- In my mill the lower roll is fixed and supported by its bearings. Means are provided for adjusting the upper roll to accommodate materials of different thicknesses. These means comprise

screws

7 and 8 and

wedges

28 and 29 which wedges may be moved in either direction by

bolts

30 and 31. The wedges act to raise the upper roll against the points of the

screws

7 and 8 when said screws have been adjusted to accommodate the thickness of the material being rolled Two wedges are provided for each end of the rolls.

The wedges act to hold the upper roll substantially against the points of the

screws

7 and 8 when no work is in the mill. This or similar means is particularly efficacious in my device wherein the u per roll is reinforced and supported by t e means heretofore described.

By reason of the floating nature of the

pistons

11 and 12 the adjustment of the upper roll does not in any way adversely affeet the fluid action on the rolls.

When there is no work in the mill the pressure may be .cut ofl from the cylinders 9 and 10. If it is not cut off the wedges Y28 and 29 will act to maintain the rolls in from cylinder 9 the positions of the rolls relative to each other would not be changed. From the foregoing it will be seen that means are provided for positively holding the rolls fixed relative to each other.

My invention has many advantages,

among which may be mentioned that rollsof l and the rolls; by properly proportioning the relation of the areas of the pistons the required amount of pressure may be created between the edges of the pistons and the rolls to effectively seal the chambers in which the reinforcing and cooling fluid is confined.

Many other advantages will be apparent to those skilled in the art and need not be recited .here.

While I have shown and described one embodiment of my invention, I desire it to be understood that I am not limited to the exact-arrangement shown and described, as many changes may be made in the details thereof without departing from the spirit of my invention.

I claim:

1. In a mill, the combination of a pair of coacting rolls, and a differential area piston having a common pressure supply for both ends of the, piston for maintaining fluid pressure on one side of one of said rolls.

2. In a mill, the combination of a pair of coacting rolls, and a diflerential area-piston having a common pressure supply for both ends. of the piston for maintainin fluid pressure alon one side of one of said rolls and substantially throughout the length thereof.

3. In a mill, the combination of a pair of coacting rolls, means for positively spacin said rolls, means for reinforcing one of sai rolls comprising a member engaging the roll and having a fluid chamber adjacent the roll, and means for supplying fluid under pressure to said chamber.

4. In a mill, the combination of a pair of coacting rolls, means for positively spacin said rolls, a piston engaging one of rolls and a fluid chamber in said piston, one

side of said chamber being constituted by one of said rolls.

5. In a mill, the combination of a pair of coacting rolls, a piston engaging one of said rolls and a fluid chamber in said piston there being a communicating passage from end to end of said piston, one side of said chamber being constituted by one of said rolls and means for holding the piston against the roll and supplying fluid to said chamber through said passage.

6. In a mill, the combination of a pair of coacting rolls, journals for said rolls, fluid means for reinforcing said rolls intermediate the journals, and means for holding said rolls positively spaced.

7. In a mill, the combination of a air of coacting rolls, journals for said rol and floating means above and below the roll pass for creating a'fluid pressure directly on both of said rolls intermediate the journals.

8. In a mill, the combination of a pair of coacting rolls, journals for said rolls, a cylinder, a diflerential area fluid piston in said cylinder for reinforcing one of said rolls, said piston having a chamber adjacent the roll connected to the interior of said cylin-' der, and means for creating a fluid pressure directly on said roll.

9. In a mill, the combination of a roll, a ylinder, a piston in said cylinder engaging said roll and having a chamber therein adjacent the roll, said cylinder and said chamber being interconnected, and means for supplying fluid under pressure for holdin the piston against the roll and creating flui pressure directly upon the roll to reinforce and cool the roll.

10. In a mill, the combination with one of the rolls of the mill, of a cylinder, a pisto-n therein having a chamber, one side of which is constituted by the roll, means connecting said chamber to the interior of said cylinder, the areas of said piston and chamber being such that the resultant hydraulic pressure acts to operatively seal the chamber against the roll whereby the liquid in thiel chamber supports and. reinforces the r0 11. In a mill, the combination with one portioned that the liquid in the cylinder acts of the rolls of the mill, of a cylinder, a pisto operatively seal the chamber against'the ton therein having a chamber, one side of roll and the liquid in the chamber acts to which is constituted by the roll, means for cool, support and reinforce the roll.

5 supplying liquid under pressure to the cylin- In testlmony whereof I have hereunto set der and the chamber in the-piston, the areas my hand. of the piston and the chamber being so pro- FLORENCE C. BIGGERT, JR.