US2034284A - Water-cooled guide disk - Google Patents

Description

March 17, 1936. s, EfmEscHR 2,034,284

WATER COOLED' GUIDE DISK Filed Oct. 19, 1955 2 Sheets-$he 1 H II I I II II INVEN1 '0R. &maa/Z BY W/T/YESS M, mw w ,5 ATTORNEYS.

k 1936- s. E. DIESCHER 2,034,284

' WATER CQOLED GUIDE DISK.

v Filed 001;. 19, .1953 2 Sheets-Sheet 2 A HORNE Y5.

Paton ted Mar. 17, me I 2,034,284

(UNITED STATES PATENT OFFICE WATER-COOLED GUIDE DISK Samuel E. Diesclier, Pittsburgh, Pa., assignor to Dleschei- Tube Mills, Inc., Pittsburgh, Pa., a corporation of Delaware Application October 19, 1933, Serial No. 694,255

My invention relates to water-cooled guide water-cooled systems whereby thetemperature disks, and particularly to such guide disks as are variation and the corresponding expansion and employed in connection with cross-roll mills. o ac ion of the guide d sks may be limited In the construction and operation of cross-roll within such ranges as not to detrimentally aflect mills, such for example as those shown and dethe sizes of the tubes that are rolled thereby. 5 scribed in my Patent No. 1,870,209, granted Au- I provide an emcient arrangement for 8111 gust 2, 1932, tubular blanks on mandrels are plying cooling water to the interiors of the rapidly passed between two cross rolls the axes of which rotating guide disks while in operation, and also are inclined to each other and to the pass line of for the escape either of steam or of highly heated the tubular blanks. The tubular blanks are water in order to dis of such heat as may be 10 caused to move through a helical path by the necessary to retain the guide disks within a preaction of the cross rolls. determined maximum temperature.

Guide disks that are mounted on axes at right The details of my invention will be described angles to the pass line between the cross rolls in connection with the accompanying drawings,

limit the outward bulging of the metal caused by in which Fig. 1 is a face view of a cross-roll mill 15 the action of the cross rolls and thereby control embodying guide disks constructed in accordthe outer diameter of the resulting tube. The once with my invention and looking in the direcguide disks are preferably driven at a higher tion of feed of a blank through it, a mandrel and peripheral speed than the longitudinal travel of a blank being shown in transverse section at the the tubular blanks, whereby the transverse fricthroat of the pass; Fig. 2 is an enlarged trans- 20 tion between the tubular blanks and the guide verse cross-sectional view of one of the guide disks is materially reduced and the flow of the disks taken on line H-II of Figand 3 is metal due to compression between the cross rolls a face viewsof the guide disk of Fig. 2.

p and the mandrel is directed longitudinally and Them l illustrated in s- 1 comprises a pa the blank is pulled forward in the pass. of oppositely disposed cross rolls l and 2 having 25 The almost continuous operation of the guide their axes inclined to each other and to the line disks in contact with highly heated metal when of feed of a blank between them. Disposed bethe mill is operating at a high rate of production tween the cross rolls and on opposite sides of the and particularly at peripheral speeds much pass between them is a pair of adjustably mounthigher than the longitudinal travel of the metal ed grooved guid r 11 disks 3 and a r n 30 causes the guide disks t become highly h ated, on horizontal axes and adapted to be driven in with the result that the diameters of the disks any suitable or usual manner, as by wobblers, not may vary somewhat in accordance with the varishown. In the pass formed between these two ations in their temperature and the diameters of pairs of rolls is shown a cylindrical mandrel 5 the tubes may have corresponding variations in within a tubular blank 6 undergoing reduction in 35 the opposite direction. wall thickness and elongation by the combined It will be appreciated that, as the temperatures actions of the rolls. of the guide disks increase, their diameters may While the structure of the disks 3 and 4 and also increase with the result that the space hethe manner of mounting and the details of asso- 40 tween the disks is shortened and the diameter of ciated parts are substantially identical, the de- 40 the resultant tubes, which is controlled by the tails of the lower guide disk 4 only are shown by spacing of the guide disks, may be diminished. way of example. The disk 4 is provided with a Similarly, if the guide disks have been adjusted shaft i that is suitablysplined as at 8 for attachat their higher temperatures for producing tubes ing driving connections thereto. At the opposite of the proper diameter and the disks are cooled, end of the shaft 1 is a thrust bearing 9 at the 45 as might occur during a breakdown or stop for outer end of which is a hood l0 engaged by a repairs or for other reasons, the shrinkage of the bar ii. The lower portion of the hood is provided guide disks by cooling will cause the tubes subsewith an opening or slot I2 through which extends quently produced to be larger in diameter than a feed pipe 3 for supplying cooling water to the those rolled by the guide disks while the latter are guide disk 4 in a manner to be presently described. 50

' at their higher temperatures. This condition Reference may now be had to Figs. 2 and 3 will obtain until the disks are again at their which illustrate in enlarged detail the construchigher temperatures. tion of the guide disk 4. The shaft 1, only a In accordance with the present invention I portion of which is shown, is provided with an P v de guide disks for cross-roll m ls that have enlarged cylindrical portion iii to constitute a s5 is a feed pipe l3 preferably of steel for supplying water to the interior of the disk. The feed pipe I3 is connected to the outer end of the pipe i3. The pipe [3 is closed at its inner end. The'pipes i1 and I8 which rotate relatively to each other -may have a relatively close flt in order to minimize seepage in case no stufling box is provided at the outer end of the shaft 1. Such seepage will be substantially eliminated if a stuffing box i3 illustrated in Fig. 2 is employed.

The pipe I! preferably does got extend to the inner end of the bore l6-and thereby provides an annular space 2| surrounding the end of the pipe l8 and which extends to the inner end of the bore l6. The 'pipe I3 is provided adjacent its inner end with a plurality of radial openings or discharge ports 22 that communicate with the annular space 2|.

The shaft 1 is provided with eight radial holes or passages 23 that are in substantially the same plane as the openings 22 and communicate with the annular space 2|. Surrounding the enlarged portion, or seat, i5 is the hub portion 24 of the guide disk and which has extending radially therethrdugh passages 25 that are in alignment with the passages 23 in the shaft 1.

Extending around the outer periphery of the hub 24 is an annular member the inner part of which is a ring 26 having an inwardly extending flange 21 that is bolted to the hub 24 by means of a series of bolts 23 that'are eight in number although any suitable number may be employed. The ring 26 is. similarly provided with eight radially extending passages 23 that register with the passages 25 of the hub.

Surrounding the ring 26 are two annular wall members 3| and 32 that are inclined toward each other in the direction toward their outer edges upon which they support a relatively narrow and radially thin rim 33. Preferably the annular members 3| and 32 are welded to the ring 26 and to the rim 33. The latter is most desirably of forged steel of the lowest possible coeiflcient of expansion that can be welded in order to minimize changes in dimension with variations in temperature. The rim 33 is most desirably provided with an outer coating.34 of an alloy that is highly resistant to abrasion and wear.

The aligned passages 23, 25, and 29 constitute inlet passages for cooling water into the annular chamber 35 formed by the members 3| and 32 and the ring 26 and the rim 33. Outlets from the chamber 35 are provided as shown in the lower portion of Fig. 2 and indicated in dotted lines in Fig. 3. Each outlet comprises a short radial hole 36 extending from the chamber 35 radially inward to connect with a transverse passage 31 through the ring 26 the ends of which passage are open to the atmosphere.

Asbest shown in Fig. 2 each outlet opening 36 is partially covered by a baflle 38 of substantially v-shape the outer portions of which are slightly spaced from the inner surfaces-of the wall members 3| and 32. The baflles 38 serve the purpose of preventing water from flowing directly from the chamber 35 into the openings 36 when the guide disk is in motion, and they also serve to reduce the amount of entrained water that such steam as may escape from the outlet port can carry entrained into the openings 36.

It may be assumed that the cross-roll mill of Fig. 1 is being driven at its normal operating speed and rolling tubular blanks on mandrels to reduce the wall thickness of the blanks and elongate them, by passing them between the cross rolls and 2 and the guide disk 3 and 4. The

guide disk 3 and 4 will be supplied withcooling water through feed pipes such as pipe l3 of Fig. 1 into the interior of their supporting shaft for distribution into the annular chamber 2| of each guide disk.

Water flows substantially equally in all directions through the aligned inlet passages 23, 25,

and 29 into the chamber 35 and is'thrown outwardly against the rim 33 by the centrifugal force of the rapidly rotating disk and by the inclined sides of the members 33 which deflect the water to the outer portion of the chamber .35 and against the rim 33. Water entering the chamber 35 is thus prevented from flowing along the inner wall of the chamber and-out through the outlet openings 36 unless the chamber is filled with water.

When the rim 33 is in contact heated tubular blanks during the rolling operation, heat is conducted to the rims from the tubular blanks and to some extent from the rim to the wall members 3| and 32, and heat is also generated in the rims by reason of the frictional engagement of the blanks and the rapidly rotating guide disks. Heat from the rim and wall members passes to the water, in thechamber. In case steam is generated it will collect on the inner surface of the chamber 35 becausethe water is thrown outwardly by centrifugal force. The steam will flow outwardly through the outlets 36 and 31 and escape into the atmosphere to carry away the excess heat that has been imparted to the rim 33. If the supply of water through the feed pipe l3 has been sufliciently rapid, hot water may escape through the outlet ports before steam is formed.

The flow of cooling water may be regulated as desired in order to insure that the temperature with the highlyof the guide disk and especially of the rim does When the mill is brought to rest and the sup-- ply of cooling water for the guide disks is cut off, the major portion of the cooling water in the chamber 35 will escape through the outlet openings in the lower portions of the guide disks in their stationary position. It is advisable therefore to rotate the guide disks and to supply them with cooling water prior to the rolling of tubular blanks thereby.

The advantage of water-cooled guide disks for cross-roll mills in accordance with my invention is that the temperature of the guide disks may be suitably controlled within such limits as to prevent undue variations in the diameter of the guide disks. Uniformity in the diameter of the guide disks permits a corresponding uniformity in the diameter of the tubes produced by the osages cross-roll mill of which the guide disks are an important part.

The reduction in temperature of the disk surfaces in contact with the tubes eliminates the rapid wear of the grooves that would occur at the higher temperatures.

The foregoing and other advantages will be apparent to those skilled in the art of constructing and operating apparatus of the same general character as the-guide disks of my invention.

I claim:

- l. A guide disk for cross-roll mills, comprising a hub portion; and a circumferential rim portion adapted to be heated by frictional engagement with hot surfaces, and having a continuous annular chamber of uniform cross-section extending around said disk adjacent said rim portion, passages for supplying cooling fluid through said hub portion to said chamber, and outlets for the cooling fluid opening from inner portions of said chamber. a

2. A guide disk for cross-roll mills, comprising a hub portion, a circumferential rim portion, a liner formed of a different metal than the rim portion secured to the periphery of the latter and adapted to be heatedbyfrictional engagementwlth hot surfaces, an annular chamber the outer wall of which is constituted by said rim portion and which is so shaped as to take advantage of the forces developed by rotation of said disk to concentratedly apply a cooling fluid to the periphcry of said iim portion, inlet passages for cooling fluid extending through said hub portion and communicating with said chamber, and outlet passages from said chamber.

3. A guide disk for cross-roll mills, comprising a shaft, a hub on said shaft, an annular member surrounding said hub and supported thereby, said annular member having two laterally spaced wall portions and a rim supported on the outer peripheries of said spaced wall portions to constitute an outer wall' for a chamber between said spaced portions, a passage extending axially of said shaft, passages extending radially between the axial conduit and said chamber, and outlet passages from said chamber.

4. A guide disk for cross-roll mills, comprising a shaft, a hub on said shaft, an annular member surrounding said hub and supported thereby, said annular member having two laterally spaced wall portions and a rim supported on the outer peripheries of said spaced wall portions to constitute an outer wall for a chamber between said spaced portions, a passage extending axially of said shaft, passages extending radially through said hub and said member to connect the l conduit to said chamber, and outlet passages extending inwardly from said chamber.

5. A guide disk for cross-roll mills, comprising a shaft, a hub on said shaft, an annular member surrounding said hub and supported thereby, said annular member having two laterally spaced wall portions and a rim supported on the outer peripheries of said spaced wall portions to constitute an outer wall for a chamber between said spaced portions, a passage extending axially of said shaft, passages extending radially through said hub and said member to connect the axial conduit to said chamber, and outlet passages each comprising a portion extending inwardly from said chamber and a portion extending laterally of said annular member and opening to the atmosphere.

6. A guide disk for cross-roll mills, comprising a rim portion adapted to be heated, an annular cooling chamber of uniform cross-section adjacent thereto, inlet passages adapted to supply cooling fluid to the periphery of said chamber while the disk is rotating, outlet passages from said chamber, and means for causing cooling fluid to travel a tortuous path in said chamber to enter said outlet passages.

'l. A guide disk for cross-roll mills, comprising a peripheral portion adapted to be heated, an annular cooling chamber of uniform cross-section formed in the disk proper adjacent said peripheral portion, inlet passages adapted to supply cooling fluid to said chamber while the disk is rotating, outlet passages from said chamber, and means for causing cooling fluid to travel a tortuous path in said chamber to enter said outlet passages, said means comprising a shield ad- Jacent-the openings of said outlet passages for deflecting liquid therefrom.

8. A guide disk for cross-roll mills, comprising a portion adapted to be heated, a cooling chamber adjacent thereto, inlet passages adapted to supply cooling fluid to said chamber while the disk is rotating, outlet passages from said chamher, and means for causing cooling fluid to travel a tortuous path in said chamber to enter said outlet passages, said means comprising a member having -a non-radial surface for deflectin liquid toward said portion of the disk adapted to be heated;

9. A guide disk for cross-roll mills, comprising a portion adapted to be heated, a cooling chamber adjacent thereto, inlet passages adapted to supply cooling fluid to said chamber while the disk is rotating, outlet passages from said chamber, and means for causing cooling fluid to travel a tortuous path in said chamber to enter said outlet passages, said means comprising a member of approximately v-shape spanning each opening into said outlet passages.

10. A guide disk for cross-roll mills, comprising an annular rim formed of a different metal than the rest of the disk and adapted to be heated by contact with hot surfaces, two spaced annular wall members connected to said rim and extending inwardly therefrom, a ring connecting the inner edges of said spaced annular members to form a chamber for cooling fluid adjacent said rim, a hub for supporting said ring, inlet passages extending through said hub and said ring for.

supplying cooling fluid to said chamber, and outlet passages from inner portions of said chamber.

11. A guide disk for cross-roll mills, comprising an inner portion and an outer peripheral portion adapted to be heated by frictional engagement .with hot surfaces, and having a continuous annular chamber of uniform cross-section extending around said disk adjacent said outer periph- 'eral portion, a passage for supplying cooling fluid through the inner portion to said chamber, and an outlet for the cooling fluid opening from an inner portion of said chamber.

12. A guide disk for cross-roll mills, comprising a disk shaped roll mounted for rotation on an axially disposed supporting shaft, 9. wearing surface formed of an alloy highly resistive to abrasion secured to the periphery of said disk, an annular cooling chamber of uniform cross-section provided-in said roll adjacent its periphery, means for supplying a cooling fluid to said cool-. ing chamber to minimize the distortion strains due to temperature changes between said wear surface and the rolls, and means for discharging said cooling fluid from the cooling chamber.

13. A guide disk for cross-roll mills, comprising a hub, the sides of which are-extended beyond the body proper thereof in spaced relation with each other to provide at its periphery a rim-cooling chamber, a work-engaging rim made of a different material than the hub secured to the peripheries of said spaced side walls and forming therewith an annular cooling chamber of uniform cross section, and means for supplying a cooling medium to and exhausting it from said cooling chamber.

14. A guide disk for cross-roll mills, comprising a hub, the sides of which are extended beyond the body proper thereof in spaced relation with each other to provide at itsperiphery a rim-cooling chamber, a work-engaging rim having a different coeflicient of expansion than the hub secured to the periphery of said extended side walls and forming therewith an annular cooling chamber of uniform cross section, and means for supplying a cooling medium to and exhausting it form cross section, means for supplying a cooling medium to and exhausting it from said cool'- ing chamber, and means for directing the flow oi the cooling medium through said chamber in such a way as to provide substantially uniform transfer of heat from said rim.

SAMUEL E. DIESCHER-.

Images