US2528075A

US2528075A - Bar mill

Info

Publication number: US2528075A
Application number: US610122A
Authority: US
Inventors: Edward T Peterson
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-08-10
Filing date: 1945-08-10
Publication date: 1950-10-31
Anticipated expiration: 1967-10-31

Description

Oct. 31, 1950 E. T. PETERSON BAR MILL 6 Sheets-Sheet 1 Filed Aug. 10, 1945 Oct. 31, 1950 E. T. PETERSON 2,523,075

BAR MILL Filed Aug. 10, 1945 6 Sheets-Sheet 2 Phi-.8

Oct. 31, 1950 E. T. PETERSON BAR MILL e Sheets-Shet 3 Filed Aug. 10, 1945 n WE '& WW

Oct. 31, 1950 E. 'r. PETERSON BAR MILL 6 Sheets-Sheet 4 Filed Aug. 10, 1945 ()ct 31, 1950 E. T. PETERSON BAR MILL Filed Aug. 10, 1945 6 Sheets-Sheet 5 Oct. 3 1, 1950 E. T. PETERSON 2,528,075

BAR MILL Filed Aug. 10, 1945 6 Sheets-Sheet 6 Patented Oct. 31, 1950 UNITED STATES PATEN T OFFICE BAR MILL Edward T. Peterson, Reading, Pa. Application August 10, 1945, Serial No. 510,122

The invention pertainsto a mill for use inithe as to be movable with respect to a set of finish-' ing rolls and the former rolls being so'arranged and constructed that they may be moved in unison longitudinally of the finishing'rolls and may be moved relative to one another horizon-' tally and vertically.

A further object of the invention is the pro- 7 vision, in a bar mill, 'of a plurality of finishing rolls supported by a stand in such a manner that the finishing rolls are removable from the stand in a direction horizontally or longitudinally of said finishing rolls, and a-set of precision rolls mounted in close proximit tothe finishing rolls and arranged adjustably so as toalign the'precision rolls relative to each other as well as' with a particular pass of the finishing rolls.

These and many other objects of the invention will become apparent from the succeeding description considered-together with the accom panying drawings, the latter of which disclose a form'of the invention, and wherein:

Figure -l is a front elevational view of a portion of a bar mill embodying the present invention.

Figure 2 is a sideelevational View of the structure disclosed in Figure '1. 1

2 Claims. (01. sly- 311) Figure 3 is a plan viewof the structure shown in Figure l.

Figure 4 is a vertical sectional view taken along the lines l3 of Figure 3, looking in the direction of'the arrows; a I Figure 5 is a vertical sectional view taken along the lines 55 of Figure 3, looking in the direction of the arrows. Y I

Figure 6 is an enlarged-vertical cross'sectional view taken alongthe lines 53-43 of Figure 1, looking in the direction of the arrows.

Figure 7 is an enlarged horizontal sectional viewtaken along the lines "!1'of Figure 5', looking in the direction of the-arrows. Figure 8 is an enlarged horizontal sectional view taken along the lines 88 of-Figur'e 5, looking inthe direction of the-arrows. I

Referring now in detail to thedrawings, wherev 2 imlike reference characters refer to like part the numeral [:is employed to indicate, in a somewhat general manner, anarrangement of;a portion of a .bar' mill employed in the manufacture orfabrication of metallic bars. The mill illustrated comprises a shoe plate2 suitably anchored'itoia'foundations and whichr'has a top portion underlying 'a floor plate '4 forming the floor'line ofthe mill. -Mounted upon the shoe plate is a stand, casting or housing '5 rising above the floor lineland removably secured to the shoe plate "through the bolts l5 conveniently and suitably :spaced about -the base of the stand. Be cause of theparticular-arrangement and association of componentsmakingup the structure of the presenteinvention, a head of the .stand is desirably formed integral with the lower portion thereofand inthisregard'the stand is of a unitarydesign capable of withstanding'the stresses to which :it' will be subjected in service. Associated with the-stand is a pair or set'of finishing I'O1'1S".B havinga-seriesof :matched, peripheral recesses :or grooves '19 formed-therein'and which may .be of-any desired configuration. 'By way of illu'stration,the.groovesshown. in the finishing'n-rolls are substantially semicircular in sectionawhichxwill form abar of substantially circulara-cross section.'-However,tif itis desired to form" bars of any other a cross-sectional configura:

tion,it;will be clearly'understood that the grooves in :the finishing rolls need-be made only to corre- SPOIlCltOCthd9Sl-T6d cross section. Each roll isprovided-with spaced journals [0 which have associated 'there with roller 01 anti-friction bearings'l-I affordingafree.rotativemovement of the rolls and each roller-bearing is encased within a suitable jbearing box or housing 12. Because the movable from-and insertible within the stand as a'unit =andif or when the finishing rolls become worn beyond a permissible degree or it is desired 1 to c'hange' the rolls for any reason, such as for the formation of a bar of another cross section, the rollsassociatedwiththe stand may be withdrawn and another set replaced in lieu thereof secured through the medium of a pinl5'or any such means a roll changing rig I5 having a surface 11 in horizontal'alignment with a surface Y Ha of the stand upon which the stanchion and o facilitate a roll changingoperation the stand is provided with a lug 44 to which is removably finishing roll assemblage bears. The finishing rolls and stanchion assemblage is provided with oppositely or transversely extending draw bars [8 and 18a so that for a removable operation a means (not shown) is associated with the draw bar l8 and the assemblage is withdrawn from the stand on to the roll changing rig and a removal of the pin will permit the roll changing rig and its superimposed assemblage to be carried by any means such as a sling and crane hook is to any desired location. A renovated or new assemblage can then be transported to adacent the stand and by attaching a means to the draw bar [8a the assemblage can be moved horizontally from the roll changing rig to its normal or illustrated position within the stand.

Means has been associated with the stand to retain an assemblage in a predetermined position as well as overcome any lifting or raising action of the top finishing roll during a bar forming operation and as exemplary of such a meansi each stanchion has associated therewith an anvil or bearing block 20 resting upon each uppermost housing and being removable from the stand with the assemblage including the stanchions and associated components. The stand I has, extending vertically therethrough, a set of bores or circular openings 21 disposed transversely of the stand and which lie in a vertically extended plane bisecting the vertically aligned axes of the finishing rolls. The lower extremity of each opening is of stepped arrangement for the accommodation of a bushing 22 removably secured to the stand and being provided with internal threads 23. Extending through each bore is a power means, stem or screw 24 having an intermediate portion exteriorly threaded so as to interlock with the threads of a related bushing and, accordingly, the vertical position or disposition of the power means is controlled by the intermeshing threads. The lower portion of each stem below the threaded intermediate portion presents a shank 25 of reduced cross sectional area and terminating in a circular, force transmittin head 26, the latter of which is rotatably associated and interlocked with a suitable block 2! bearing downwardly against a subjacent anvil. Stem actuating or rotating meansis provided in the stand and while various arrangements may 'be here employed, the preferred means is to arrange splines or longitudinally extending grooves 28 in an upper extremity of each stem or an extremity thereof removed from the head. Disposed with, in a suitable recess in the stand is a collar 29. desirably spaced from but, however, surrounding the upper extremity of each stem. Rotatably associated and in supported relation with the collars are a plurality of

spur gears

30 and 30a which are interiorly configured to interlock with the splines of the respective stems. Accordingly, any rotative motion of the

gears

30 and 30a will impart a like action to the stems to cause the stems to move axially relative to the gears and because of the presence of the threaded relationship between the stems and bushings the blocks 21 will be moved or urged upwardly or downwardly depending, of course, on the direction of rotation of the gears. Extendin transversely of the stand and associated with the head thereof is a plurality of gear actuating means exemplified by telescoping shafts 3| and Ma, the latter of which extends through the former as indicated in Figure 4 particularly because of their relative sizes. Associated with an extremityof each shaft is a worm gear (not shown) which intermeshes with a related spur gear while the opposite ends of the shafts are provided with

ratchet wrenches

32 and 32a. Accordingly, the stems are individually adjustable so that the proper pressure may be applied to each anvil individually and the fun ishing rolls may be adjusted or have force applied thereto so that the rolls will function properly and as intended.

Means has been provided in the structure of the present invention to take up any slack or lost motion in the threads of the stem-bushing relationship and, as exemplary of such a means, the stanchions are provided with reentrant shoulders 33 each having an arcuate downwardly facing surface 34. Extending horizontally or transversely of the head or structure is a beam or bridge 35 having accommodating apertures for the reception of the stem and in bearing relation with the stanchion arcuate surfaces. Each extremity of the bridge is jaw-shaped as at 36 to be pin connected to an eyelet or lower extremity 37 of a hanger means 38, the latter of which extends vertically or upwardly from the bridge ex tremities. Outstanding horizontally from the head adjacent the vertical limits of the bushings is a pair of oppositely directed shelves, ledges or brackets 39 suitably apertured for the extension of the hanger means therethrough. Sleeved over each hanger means and supported by a related shelf is a resilient means, coil or helical spring 40 having mounted thereon a spring plate or cap 4| which is held in a predetermined position by a rotatable element or nut or nuts 42 associated with an extremity of the hanger element removed from the eyelet thereof. By a rotation of the nuts a predetermined compressive value of the springs can be definitely established and these forces transmitted to the stanchions through the hangers and bridge will eliminate any slack between the threads of the stems and bushings. It might be here stated, incidentally, that the bridge is perforated as at 53 and bafile plates M are arranged between the bearing housings and bridge so that a coolant may be directed to the finishing rolls during a bar fabricating operation.

When it is desired to replace an assemblage the nuts 42 are rotated to relieve the springs and the pressure is relieved from the bridgestanchion connections. The ratchet wrenches are rotated to cause the blocks 21 to move upwardly away from the anvils and upon removal ofthe baffle plates the assemblage is in condition to be shifted horizontally out of the stand as hereinbefore described.

It might be well to state at this time that the finishing rolls may be driven by any means but it is preferred to couple adjacent extremities of the finishing rolls to a related three-high mill as indicated diagrammatically by the reference character 45 in Figure 3 only of the drawings.

Because of the possibility of a bar emerging from the finishing rolls not of true cross sectional area, and by that is meant, a bar, preparatory to being subjected to a pass of the finishing rolls, may contain more metal in cross section than required in the finished bar and, accordingly, it may emerge from the rolls with burrs or fins extending longitudinally of the bar and in order to complete afinal operation on the bar to ensure a true predetermined cross sectional configuration, precision rolls i6 and 4611 are disposed adjacent to the finishing rolls. The precision rolls are, as will be hereinafter more clearly pointed out, arranged to intercept the bar as soon as possible after it has left the fin- 5. ishingzrolls so as not to subject :the bar 'tozany abnormal or bendingstresses .and, "for mhis reason, the bridge, gap or space .ibetween the finishing and precision rolls is such :that, considered .by the size of the rolls, is less than the diameter of either of the rolls. .By'spacin'g the rolls thus in close proximity to one another the bar-or. bars are .acted upon .almost immediately :as :they emerge from the finishing rolls.

The precision rolls .are carried 'bya main vertical roll housing 4:1 Which-comprises annpright barrier 48 having a lower extremity or foot .49 thereof extending into .the fhorizontaliliniitsuof the standard andbeing supported by and in sliding engagement with :the .shoe aplate. The vertical roll housing is, therefore, in telescoping relation with the stand and thus, among other reasons hereinafter madeapparendithe precision rolls are capable of being placed in a=close;prox imity to the finishing rolls. :Spaceda predetermined distance away from the stand :and -ex-' tending parallel to th sstand transversely-thereof is 3,-51108 beam 50 suitablyanchored to the foundation and having a topsurfa'ce :Efla :in the proximity of the floor line and substantially in horizontal alignment .with the Ebarrier *foot. The main housing 'has, spaced horizontally :from the foot, away from thestand,a:downwardlyifacing channel-shaped guidewayrfil which :fits neatly over the shoe beam '58 and this :arrangement functions as an outer support for the :main housing. By reason-of the shoe beam fitting into the guideway, a definite interlock is thus'formed to absolutely fix the :position of the mainhousing or prevent it from shifting in a direction directly away from or towardthe stand. Themainwertical roll housing has, in the area abetwe'enithe shoe'beam and stand, a verticallysextending.bore

52 separated into various communicating chambers for the accommodation-of relatedstructure hereinafter described in detail. axially of thebore 52 isa-spindle258 .havingasuitably secured to its upper or :fre'e extremity the precision roll Miawhich is adapted to rotate .in

response to a irotative action "imparted :to the spindle. Disposed within the bore and movable vertically therein relative :to the main housing is a sleeve "54 havingfa lower portion 55 extending about' the intermediatepart 'of "the spindle and 'an upper enlarged portion 56 "encas'ing an anti-friction bearing 51 interposed between the spindle and sleeve toaf ford -a free running movement-of the spindle. cap or-cover 5'8'is interposedbetween the precision ro1l 4'6a and enlarged portion of the '-sleeve and is removably secured to the latter in supporting relation with the -'pre-" cision roll 46a. While the bearing "5| 'forms a suitable guide "for the upper extremity of the spindle the lower extremity is guided' by a roller oranti-friction bearing 58a "having an inner raceway 59 thereof forniing a part of adrive gear 60 which is splined 'to': the spindle so:asto move the latter in a :rotative direction but arranged to-'move relativelyztheretoaxially of the' Forming a 'partof the running gear motion'to the-beveled -gears,;spindle andzprecision ,75

Extending 6 I roll 46a. The driving .gear .is made, .as previously described, so as to remain fixedivertically relativeito the main housing but howeveryhave the spindle moive axially thereof and thereby .provide an :adeqnate'zguide means :for the spindle while permitting :a vertical adjustment .of the precision roll 4.6a to be made hereinafter .apparent. As implied, therefore, means has :been associated'with the main housing'so that a .vertical adjustment of the precision roll 16a maybe effected :andas exemplary of such a means, the lower .portion :of the sleeve :is exteriorly threaded as .at v65. Bearing upon .a suitable shoulderifi 6 within the bore .is a rotatableelement or actuating means orannular gear nut 66a'hav-' ing interior threads intermeshingwith the exterior-threads .of the sleeve. nlretaining ring li l interlocked with the main. housing bears upon the gear nut .soas :to .maintain'it in "bearing relation .with the shoulder and while permitting a rotative action of the gear nut, 'thearet'aihing ring prevents it from moving verticallyrelative to the main housing. The exterio'r of the gear nut is provided with teeth Gil-which m'esh'with correspondingly formed teeth of a ihorizontally disposed worm gear'fill suita'bly j'ournaled in the main housing. An operating bar *1 0 is outstandof the ratchet II will, through the rotative actions ofthe worm andnut gears, cause the sleeve to be moved vertically and alter'the vertical disposition of th precision rolls 46a relative to the main vertical roll housing.

A looking I mechanism 12 has %been associated with the sleeve of the main housing to hold the spindle in -a fixed position after it has' {been set at a required height. The lockingmechanism desirably comprises an annular jamb nut 13 interiorly threaded to be intermesh ed with the threads '01 thesleeve and is normallyin bearing relation with the overlying-shoulder 66 fto thereby prevent .an unwarranted'rotative motion of the sleeve. Exterior teeth are '-formed on the "jamb nut to accommodate -"correspon'ding'ly formed teeth on a worm gear 15 whichhas an axis extending horizontally or perpendicularly I to the axis of the --spin'dle or jamb nut. Theworm gear 15 has a shaft 16 whichextends beyondthe horizontal 'limits of the' main h'ousihgas at 1 6a and is suitably journale d within themain housing. A ratchet wrench oranyp'ower means (not shown) maybe associated with the shaft ex-' tremity to impart a rotativemotion to the related worm gear. A-rotativeactionof the wormgear will movethe jarnb 'nut'away from its related shoulder 'to afford avertical adjustment of. the precision roll 4.6a and after the completion of that operation the jamb nut, is again. moved'into contact .withthe overlying shoulder "to maintain the .thus established .precision'rollheight.

.Associated ,with the .main vertical .roll 1 housing isan auxiliary vertical lrolllhousing 1,1 which .is formed with .a coredoha mber lforming partitions 18 adjacent one side thereof. ...Extending .ver-

tically through the-cored portion.is.:a.s pindle .19

' having, at, its uppenextremity, the precisionroll ing the bearing within the auxiliary housing is a cap 8! removably secured to the auxiliary housing byany desired means. The cap 8| also functions as a support for the precision roll 45 and because of this relationship this particular precision roll is at all times maintained at a constant'predetermined height. For the sake of economy and sound manufacturing practice, the two spindles are made counterparts of one another and, accordingly, the lower extremity of the spindle 19 is also guided by a roller or antifriction bearing 82 having an inner raceway 83 thereof forming a part of a driving gear 84 which is splined to the related spindle so as to move the'latter in a rotative direction. Removed from the inner raceway but forming an integral part thereof is a beveled gear 85 which intermeshes with'a correspondingly formed beveled gear 86, the latter of which is operatively coupled to a train of gears (not shown) housed by a gear box 81. The gear box 8! is removably secured to the auxiliary vertical roll, housing and has associated therewith a suitable motor 88 so that the latter is, through the medium of the train of gears and related beveled gears, capable of imparting a rotativc motion'to the spindle l9 and its associated precision roll.

The vertical or precision rolls are each provided with a peripheral groove or recess 89 of a configuration to correspond identically with a half of the desired or final configuration of the completed bar so that when placed in juxtaposition the grooves will be properly mated to perform the final operation on the bar. As previously described, the precision roll 45a may be adjusted vertically only so as to align vertically the grooves of the precision rolls. However, a horizontal adjustment of the precision rolls is also desired because, among other numerous reasons, the precision rolls after continued usage may be required to be redressed due to wear caused thereto incident to service. As exemplary of various means for moving the precision roll 46 toward or away from the precision roll 48a or, in other words, moving the precision roll 46 perpendicular or normal to the flight of the rod between the precision rolls, the auxiliary housing is provided with an abutment 99 adjacent to the upper limits thereof and desirably adjacent the horizontal plane of the precision rolls. The abutment has an interlocking cage 9| associated therewith and the latter is arranged to movably accommodate or interlock with a head 92 of a horizontally directed ram 93. rier of the main vertical roll housing has a horizontal bore94 in substantial alignment with the cage and has at one end thereof an interiorly threaded bushing Q interlocked with the barrier by any desired means such as the illustrated cap screws 95. Exterior threads 9'? are provided on the ram intermediate its ends to intermesh with the interior threads of the related bushing and a ratchet wrench 93 is associated with the free extremityof the ram to impart a rotative motion to the latter. Any rotative movement of the ram will, therefore, move the auxiliary housing horizontally and the precision roll carried thereby toward or away from the related precision roll. A lock nut 99 is rotatably associated with the exterior threads of the ram so that after a presetting of the precision rolls has been effected the lock nut is turned up against the barrier to prevent an accidental movement of the ram. Also to be noted is that the horizontal axis of the ram is in alignment with the axis of the rod forming grooves in'the The upright bara precision rolls and, by reason of this relationship, any tendency of the precision roll to shift away from the precision roll 46a will be directly transmitted to the ram.

For reasons which will be hereinafter made apparent, the auxiliary vertical roll housing is desirably supported by the main vertical roll housing and because of this preferred relationship, the auxiliary housing is provided with an arm or extension H10 directed horizontally into a suitably formed recess, guideway or pocket llil in the main housing. The arm is of a width less than the length of the pocket so as to afiord an adjustment of the precision roll 46 toward or away from the precision roll 46a. The thickness of the arm is slightly less than the height of the pocket and preferably a sliding fit is provided between upper and lower surfaces of the arm so that a full surface bearing relationship will be presented between the arm surfaces mentioned and contiguous surfaces of the pocket. So as to ensure a.full bearing relation between the arm and main housing the arm of the auxiliary housing is provided with a wedge-shaped groove I02 extending throughout its width and disposed within the groove is a wedge H13 having a threaded shank I04 extending beyond a guide clip I05 where the wedge is provided with a nut or nuts I06. A proper manipulation of the nut or nuts 106 will draw the wedge longitudinally of the groove I02 to positively and efiectively bind the arm within the pocket. It will be .noted that this relationship also assists in looking together the auxiliar and main vertical roll housings to prevent unwarranted shifting horizontally therebetween. The guide clip is disposed within the main housing pocket and has vertically spaced legs l0! thereof abutting suitable shoulders I88. Stud bolts 509 interlock the guide clip with the arm and, accordingly, when upon release of the wedge, the auxiliary housing in being moved for precision roll horizontal adjustment, follows a definite fixed predetermined path.

The arrangement formed by the auxiliary and main vertical roll housings is fixed with respect to a predetermined position by a bolt H0 having a head Hi disposed in a counterbore opening into the main housing pocket and a shank H2 which extends through a suitable accommodating may be employed in the fabrication of bars.

The primary reason for utilizing finishing rolls with a multiplicity of bar-forming grooves is so that as one mating pair or set of grooves wears beyond a permissible degree then the next set may be employed and so on until the last set has become worn. By reason of this common expediency a pair of finishing rolls need not be replaced or reconditioned until after all the bar-forming grooves have become worn and also the arrangement formed by the two housings is made movable in a direction axially of the horizontal or finishing rolls so that the grooves in the precision rolls can be aligned horizontally with the set of finishing roll grooves being employed. The means for imparting a horizontal movement to the arrangement is characterized by a motor H operatively connected to a gear box H6 Containing a train of gears (not shown). Both the motor and gear box just described are suitably anchored to the foundation by any desired means not shown. Associated with the train of gears in the box H6 is a reciprocating plunger ll'l adapted to be moved axially thereof through the action of the motor. One Or a free extremity of the plunger is pin connected to a jaw H8 formed integrally with the main vertical roll housing so that any motion imparted to the plunger will be reflected in the arrangement formed by the two housings and related components.

From the above it will be noted that various changes and alterations may be made to the illustrated and described construction without departing from within the spirit of the invention and scope of the appended claims.

I claim:

1. In a bar mill, the combination of, a main housing having a vertical bore, a sleeve within said bore, a spindle carried by said sleeve and having a precision roll secured to an upper end thereof, a gear nut supported by said main housing and being threadedly associated with said sleeve for moving the latter vertically, a jamb nut carried by said sleeve and reacting against said main housing, an auxiliary housing within and carried by said main housing, a vertical spindle carried by said auxiliary housing and having a precision roll secured to an upper end thereof, a barrier on said main housing, adjusting means carried by said barrier and connected to said auxiliary housing in alignment with said precision rolls for moving one of said precision rolls away or toward the other of said precision rolls, and synchronized motor means carried by each of said housings for driving said spindles independently of one another and at the same peripheral speed.

2. In a bar mill, the combination of, a main housing having a vertical bore, a sleeve within said bore, a spindle carried by said sleeve and having a precision roll secured to an upper end thereof, a gear nut supported by said main housing and being threadedly associated with said sleeve intermediate the ends thereof for moving the latter vertically, means carried by said main housing for rotating said gear nut, a jamb nut carried by said sleeve in spaced relation with said gear nut and reacting against said main housing, means for rotating said jamb nut for allowing vertical adjustment of said sleeve, an auxiliary housing within and carried by said main housing, a vertical spindle carried by said auxiliary housing and having a precision roll secured to an upper end thereof, a barrier on said main housing, adjusting means carried by said barrier and connected to said auxiliary housing in alignment with said precision rolls for moving one of said precision rolls away or toward the other of said precision rolls, and synchronized motor means carried by each of said housings for driving said spindles independently of one another and at the same peripheral speed.

, EDWARD T. PETERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,016,016 Mikaelson et al Oct. 1, 1935 2,063,810 Iverson Dec. 8, 1936 2,105,258 OMalley Jan. 11, 1938 2,357,058 Ramsay Aug. 29, 1944