US1406084A - Bar reverser - Google Patents

Description

BAR REVERSER. APPLICATION mio 1m28. 1920.

1,406,084', Patented Feb. 7, 1922.

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Idar/ley H. B. ROSE.

BAR REVERSER.

APPLxcATloN mio 1AN.28.1920.

H. B. ROSE'.

I BAR REVERSER.- "PPLlcATloN man 1mm. |920.

1,406,084, Patented Feb. 7, 1922.

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Voperations have'to be f lnu'rizn sTAT Es PATENT OFFICE.

HARRY B.' ROSE, oF BUFFALO, NEW YORK.

VBAR REVERSER.

Specification of Letters Patent.

Patented Feb. 7, 1922.

I Application filed January 2S, 1920. c Serial o. 354,705.

To all @atom t may concern:

Be it known that I, HARRY B. Rosn, a c1t1- zen of the United States of America, and a' resident of the city of Buifalo, county of Erie and State of New York, have invented certainnew and useful Improvements invBar l-eversers, of which the following is a full,

clear, and exact description.- .Y

' l/Iy inventionfrelates generallyto' barrevversers and more particularly -to devices for p grasping the end of a bar coming fromthe pass rolls of a rolling mill and to'turn the end around and direct it into another setof pass rolls.L Y v lt is well known that in the form of rolling mills whe-re the rolls for successive passes .are arranged with their axes ina substantially straight line, it ifs necessary that the end of the bar be reversed in its direction of travel in ,order that it may be successively passed through the various passes of the rolling mill. lt is the present practice l to have an operator stand between the pairs of rollsfor each two successive passes, whose duty it is to grab the end ofthe bar as it is coming from the iirst setfof pass rolls and by turninghisfbody, to turn l the -end ofthe Vliar and direct it into the next successive pair ofrolls. This operationis 'not only diiicult, requiring'considerable skill, but is fraught with a A good deal of danger. Itgis also necessary during this turning or revers-l ing motion to give the bar ,a turn Aaxially through substantially 900.` before :it isspassed into the second set of pass rolls. These two performed', between each set of passes. f The principal vobject of Vbeen to provide a device which shall perform these twov operations mechanically, and one whichshall he automatic `in its operation.

Another object has been to provide a device of this nature which shall be comparativelysimple in its construction and operation, andciie, therefore, which sha-ll be" durableand eflicient. n

The above objects and advantages Vhave been accomplished by the device shown in the accompanying drawings, `of which:

le' l is a plan view of my complete defvi ce, ishowing fragmentary portions of two successive passes of a rolling mill.

Fic'. 2 is a front elevation of in device my invention, has

Fig. y3 is an enlarged, longitudinal,

tional view of the rippin means and is taken on .line 3,-3 ofgFig. v2. Y

Fig. 4 is an enlarged view ofthe gripping means vshowing the position i-t occupies when the reverse arm 17 is in its reverse position.'V

Fig. 5 is a diagramma-tical view showing the electric wiring and connections between 'the several parts ofthe device.

Figs 6 and 7 show two modifications of the grippingmeans. Y

`Referring now to thedrawings and more particularly to Figs. 1 to 4 inclusive, 10 represents the rolling mill bed, kllfthe mill housing, and 12 and 13 two success-vive pairs Vof pass rolls. 14 is a rolled bar, coming from the lirstset of pass rolls 12. My devicey is arranged alongside of the rolling mill and pass rolls.

.Myidevice comprises afbase 1.5 `havinga i standard 16 which carries a reverse arm 17.

The reversev armis rigidly mounted upon a kshaft 18,V which is rotatably ,carried by the vin registering position with the passes of the standard 1G and is preferably provided withY` roller bearings 19..v and `a step bearing 20. A

gear housing 21 is formed at the base of the standard'lG and within itis mounted va ,worin gear 22 andt an engaging worin 23.. 1 The worin gear. 22is rigidly attachedto the shaftf p AV18, whereby the reverse -arm v17 -is actuated.

a Suitabie durch 27. A Clutch-yoke 2s is i gageable with the movable member frthe clutch for throwing it 'into and out of .en-

gageinent. :This clutch yoke 28 is pivotally mounted upon an arm 29 carried by the gear wardly extending armV 30.

. 35 'is a solenoid'which isprovidedwith--a core 361 The core 36 is connected ,with the outer end of the clutch-yoke arm 30, preferhousing21` and is provided with .an out-' ably, by means -of. a link 37, so that when the solenoid is energized, the clutch members Y will be brought into engagement. A spring 38, having oneend attached to the outer end of the arm 30 and .its opposite fend to". the

is being rotated to move the arm from the 30 :,-i :45l by means of'sprmgs 48. The roll 45 is provided preferably with a `bevel gear 49 at -the lower end of its shaftl and `this gear 5 Vmeshes witha similar bevel gear 50 mounted 3 base 15, is provided for retracting the arm positionfshown in Fig. 1 to its reverse position, this spring willvbe woundV about the shaft 24 so that, when the clutch 27 discon- `nectsthe motor from the shaft 24, this spring Awill: unwind and rotate the worm shaft 24 in the reverse direction, thereby moving I the reverse arm 17 back to the position shown in Fig. 1.

Insome cases, owing to the size of the rolling mill housing, it is impractical to l:set 'my device' vclose Venough to the pass rollstofproperly'guide the advance end of the bar` being rolled into the pass rolls. In such cases, in order to properly guide the advance end of the bar intothe next successive fpair' ofpass rolls, Ilprovide pinch rolls 45 Y and v46. These rolls are mounted upon a suitable' standard 47, and the roll 46 is mounted so as-to be pressed toward the'roll ilu "on one end of ythe motor shaft 26. Y The` pln'ch roll 45 is kepty continuously rotating by the motor 25, and the reverse arm 17 is :operated when the worm shaftv 24Yis .conn nected with the motor shaft 26. e

The reverse arm 17 -is providedat its outer ,'endwith' gripping means 51. These gripping ymeansjcomprise' a' gripping head 52,

' '.,haying a central, spherical 'bearingvportion 53. The bearing portion V53 Yis rotatably mounted within a housing 54, formed at the outerI end of the arm 17 Inthe upper i face of'this housing 54^is provided'a longitudinal slot 55 (see Fig. 1),'and a turning `5v0"pin 56, rigidly attached to thebearing portion 23 of the head 52,- is slidably disposed withinthe slot 55. By means 'of the pin 56, the4 gripping head 52 may be turned through an yangle of substantially 90, so

i z; that if the bar comes from the first pair of pass rolls with its longest side lin a horizontal position, it will be presented to the second .set of pass rolls wlth the same side in a vertical position. A'turning arm 57 is arranged above the reverse arm 17 and has its outer end pivotally connected with the pin 56. This end ofthe arm is curved slightly so as tol conform with the circular' shape of the housing 54 when the pin 56 has Abeen moved to the position shown in Fig. 4.

The inner end ofthe turning arm is pivotally 'pine connected by means of a universal connector 58 to a turning standard 59 carried by the standard 16. This turning standard is arranged so as to have its pivot pin 60 arranged in a plane which is co-incident with the vertical planeA passing centrally through the reverse arm 17 when it occupies the position shown in Fig. 1. The pin 60 is so positioned that it leson the side'of the shaft 18 which is opposite the gripping means 51, when it occupies the position shown in Figs. 1 and 2. It will beseen that as the reverse `arm 17 is'moved through substantially 180,

the distance between the pivot pin 60 of the turning arm 59 and the gripping means 51 Vwill be decreased, thereby causing the turning arm 57 to move the pin 56 to turn the gripping head 52 within the housing 5,4. The distance between the pivot pin 60 and the axis of the shaft 18 is such that the gripping head 52V will be preferably rotated through substantially 90. The gripping head 52 is providedwith an opening 61 and the bearing 54 with an opening 62 through which the bar may be discharged from the gripping means.

65 and 66 are grippingjaws for .the gripmeans 51. The jaw66 is rigidly attached within the head 52 byV any suitable means; and the jaw 65is provided with an outwardly projecting arm 67, whichl ispivotally attached to lugs 64 formed on the grip-V ping head 52. These gripping jaws are spaced apart a distance-equal to, preferably,y Vthe narrower side of the bar being rolled,

and their outer ends are dared as shown in Fig. 3, so as to provide a suitable ,c {uidefor 'the entrance of the advance end of the bar.

An electric circuit closing means 68 is carried by the gripping head 52 and is actuated b y the movement of the movable g`rip-` ping jaw 65,V These means comprise an *arm 69, carriedby the grippinghead 52 and provided with an' outwardlyV extending bent Vportion 70. An adjusting screw 71 iscarlried by this bent portion 7 0 and has a washerV `7 2 secured at its lower end. yArranged in line with the adjusting screw. 1:is a rod 73 which has its lower end passingv through a suitable bearing aperture in the gripping head 52 and isattaehed to the free end ofthe movable gripping jaw 65. The lower end of the rod 73 vis preferably providedv with a slot 74, as shown inv Fig. 3, and 'it is connected to the movable jaw 65 bymeansVK of a pin 75. Thek slot 74 is provided for ac-` commodating the longitudinal movement of the'movable jaw 65 as it is oscillated on its pivot. The rod73-is provided at its upper end with a washer 7 6and a switch arm 77 of insulating material. A spring 78 is ar-` ranged between the vwasher 72 andthe armA 77, whereby the rod 73 will be normallypressed away from the washer 72 and keep the movable jaw 65 in the dotted line position shown in Fig. 3 when there is no bar within the gripping means. A switch base 7 9, of insulating material is carried by the portion 70 of the arm 69 and supports .two switch Contact members 80 and 81. The switch arm 77 carries a switch blade82 which has its upper end vdisposed within a slot 83 formed in the base 79. The upper end of the blade 82 lis engageable with the switch contact members 80 and 81 when the movable gripping jaw 65 is in the position shown in Fig. 3. v

The adjusting screw 71 provides for altering the tension placed upon the spring 78 and the movable gripping jaw 65.. The dis? tance that the advance endot' the bar will project beyond the farther end of the gripping head .before contact is madebetween the switch members 80 and 81 may befgoverned 'by this means.A The lighter the pressure ot' lthe spring 78, the less will be the frictional engagement between the gripping jaws 65 and 66 and the passing bar and, therefore7 the projecting end of the bar will be greaterthan when the tension of the spring 78 isadjustedfto increase the friction between the bar andthe gripping jaws.

The switch for closing the electric circuit kof the device is provided so that the solenoid may be energized, but it is necessary to provide some means for de-energizing the same when thereverse arm 17 has moved through its predeterminedtravel. A de-energizing switch 85 is, therefore, provided for this purpose. Thisswitch comprises aswitch bar 86, slidably carried vbya base 87 of insulating material. The base 87 is supported preferably by the motor 25 andin the path ot travel ot Vthe reverse arm 17. The switch bar186 is provided with an upwardly proj ecting arm 88 which is engageable with the reverse arm 17. 89 and 90 are the contact members of the cle-energizingswitch.which are engaged by the bar 86. A helical spring 91 is provided on the bar 86 for keeping it normally in engagement with the contact .members 89 and 90, as shownin Fig.1.v

In Fig. 5, where I show a diagram `of the electricconnections of my device, 95 represents any suitable source otelectric energy which has one of its. terminals connected with the electric circuit closing means 68 by means of a lead 96. The means 68 is also jaw ci: the gripping means and this comL pletes Vthe circuit just above described,

A lead 99 connects the other side of Y limit ot its travel it will strike the de-energizing switch and open this circuit, thus deenergizing the solenoid and allowing the parts to return to the positions shown in Figs. 1 and 2.

When the advance endet the bar being -rolled has been turned around and directed toward the pinch rolls, it is, of course, necessary that the end be nearly in line with the opening between the pinch rolls. This, of course, will depend not only upon the relative position of the pinchrolls with respect to thegripping head 5 2, but also upon the distance that the end of the bar projects beyond the end of the gripping'jaws 65 and 66. If the bar passes through the jaws beyond a distance at which the end thereof will register with the Vpinch rolls, it is desirable to move theend of the bar inwardly, in this case, so as to properly meet the pinch rolls. In the modified form shown in Fig. 6, this is vaccomplished by providing a cam-shaped or angularly-arranged slot 100 inA the `housing 63a instead 'of the slot 55 shown in theother 'figures vof the drawing. As hereinbefore described, the bearing for the gripping head is spherical so that theaXis of the gripping head may be conveniently altered during the rotation of the reverse arm 17. It will be seen that as the pin 56 of the gripping head 52 is moved along the rslot 100, the axis of the gripping head 52 will be moved `to the dotted line position in a counter-clockwise direction as viewed in Fig. 6, thus moving the forward end of the bar inwardly so that it will be properly directed betweenjthe pinch rolls. The amount oit motion of the gripping head will, of course,i be governedj` by the shape and angular disposition of the slot 100. The more acute this angle is with the side face of the reverse arm 17, theless will be the amount of motion of the gripping head 52.

In some instances, it may not be necessary to rotate the baron its axis during theV reversal of. ,its direction of travel, and in such cases the reverse arm 17 will be provided4 with a gripping head like that shown in Fig. 7. In this ligure the gripping head 101 is rigidly secured within the bearing 102, and the bearing is provided through its horizonvtal axis with a slot 103 for the discharge of the bar. y Y

From the foregoing', it will lie-clear that when the bar comes 'from the first pair oi rolls12 of the mill andis projectedinto Athe gripping means and between the jaws 65` and 66 thereof, it. will cause the movable jaw y65 to move from the dotted liuc position shown in Fig. 3 to the full line position ot +1 C XV! 'A +1 1 n' j tus ligure. Mien mdie .ast mentioner. position, the switch of the electric-circuit and 2).

closing means 68 will be closed by the upward movement of the switch blade 82 which is controlled by the movement of the rod 7 3. The electrical circuit will then be completed through the leads and apparatus, shown in Fig. 5, and the'solenoid 35 will be energized. 'Ihis will operate the arm 3() of the clutch-yoke 28 and force the clutch 27 into engagement, thereby connecting the worm shaft 24l with the constantly rotating motor shaft 26. When the parts are so -connected, the reverse arm 17 will be moved in a counter-clockwise direction, as viewed in Fig. 1, carrying with it the advance end of the rolled bar. When the reverse arm 17 has reached -its predetermined limit off travel, and theforward end oi the bar has been grasped by the pinch rolls and 46, or the next set of pass rolls, the de-energizing switch'r85 will be opened by the engagement of the reverse arm 17 with the projecting arm 88 ofthis switch, and the circuit shown in Fig. 5 will thus be broken and the solenoid 35 thereby cle-energized. This will allow the spring V38v to retract the arm 30 of the clutch-yoke, which will disengage the clutch 27. yAs previously described, the spring 39V will be wound up when the worm shaft 24 has been operated; and when the clutch 27 is disengaged, this spring 39 will unwind itself, and, as it does so, it will rotate the worm'shaft 24 in a reverse direction and clause thereverse arm 17 to be moved back toits initial position (shown in Figs. 1

As hereinbe'lore stated, the 4pinoli roll 45 is being constantly rotated by the motor 25, and as soon as the end of the Vbar 'engages with these rolls, it is immediately drawn in Vbetween them and directed 'towardthe next successive set oi` pass rolls 13 ot the mill.

VAs the reverse arm 17 is being moved y-through its predetermined travel, it will be vclear that the turning arm 57 will move the pin 56 through the slot 55 of the gripping head bearing 54, Vand thus rotate the gripping head 52, whereby the bar will be axially rotated through an angle of substantially 90 (see Fig.4), before it is presented to the pinch rolls and the next-successive set of pass rolls.

" It will `be clear that when the gripping head 52 has been rotated to the position shown in Fig. 4, the narrower side of the -bar 14 will be in line with the opening 61 of the gripping head 52 and the opening 62 of the bearing 54, in which position it will be free to drop out from between the gripping jaws and 66. As the forward end of the bar is being carried around by the reverse arm 17 itwill be clear that the portion of the bar between the gripping means and the set of rolls from which the bar is coming will sag considerably, so` that when the reverse arm has reached the limit of its of the sagging portion of the bar Vwill tend to draw the bar out from between the jaws and thereby Vrelease thev reverse arm 17. When the bar is thus released, the clutch 27 has already been disengaged-and the arm is being urged to its initial position by the 'spring 39, which moves itto its initial positravel andthe grippingjaws 65 and 6G are I Vin the position shown in Fig. 4, the weight trical means for controlling the starting and stopping of the reverse arm 1 7, it is obvious that any suitable and mechanical equivalent of these means may be employed with equalefficiency. Furthermore, the gripping head 52 may be rotated through an angle greater or less than if so desired. These and other modifications of the. details herein Y shown and described may be made without departing from the-spirit of my `invention or the scope of the appended claims, and I vdo not, therefore, wish to be limited to the exact embodiment herein shown and described, the form described being merely a preferredY embodiment thereof.

" Having thus described my invention what Ilclaimisf Y 1y f f 1.The combination with a pair ot pass rolls,'of a bar vreverser comprising a pivo-V tally mounted reverse arm, and means carried by the arm forV gripping, and moving with, a bar as it is coming from the pass rolls whereby the arm Vwill be moved and the original entering end of theb'ar will always` be the advance end.

2. Thecombination with a pair of pass end engageable andV movable `with the advance end of a baras it is coming from the rolls, oiV a bar reverser comprising a pivlotally mounted reverse arm having its outer passrolls, and means for operating the reverse arm, whereby the original entering end Y of the bar willalways be the advance end.

"3; The combination with arpair of pass rolls, of a bar reverser comprising a pivotally mounted reverse arm` having its outer end engageable and movable with the advance end of a bar asit is coming from the pass rolls, gripping means carried at the outer end of the arm, and means for operating the Areverse arm, whereby the path of travel of the bar willbe changed.

4. The combination with a pair of passk rolls, of a 'bar reverser comprising a pivotally mounted reversev arm having its outer end eagageable and movable with the .advance end of a bar as it is comingfrom V.the

pass rolls, means for rotatingthe arm soV that the original entering end of the bar will always be the advance end, and means for stopping' the'movement of the arm.

5. The combination with a pair of pass rolls, of a bar reverser comprising a pivota'lly mountedreverse ar1'nm'eans carried by the armv for gripping', and moving with, a bar as it is coming from the pass rolls, and means for rotating the bar axially.

6. The combination with a' pair of pass rolls, of a bar reverser comprising a pivotally mounted reverse arm having its outer end engageable and movable with the ad- Vance end of a bar as it is coming from the pass rolls, means for rotating the bar axially, and means for operating the reverse arm.

7. The combination with a pair of pass rolls, of a bar reverser comprising a pivotally mounted reverse arm, rotatably mounted means carried at the outer end of the arm for gripping and moving with a bar as it is coming from the pass rolls, a pivotally mounted turning arm arranged adjacent the reverse arm, and a connection between theturning arm and thev gripping means whereby the bar will be rotated axially as its path of travel is being changed.

8. The combination with a pair of pass rolls, of a bar reverser comprising a pivotally mounted reverse arm, rotatably mounted gripping means carried at the outer end of the arm and movable with a bar as it is coming from the pass rolls, a pivotally mounted turning arm arranged adjacent the reverse arm, a connection between the turning arm and the gripping means, the pivot of the turning arm being eccentrically arranged with respect to the pivot of the-reverse arm, whereby, when the reverse arm is rotated, the turning arm will move relatively therewith and rotate the gripping means.

9. The combination with a pair of pass rolls, of a bar reverser comprising a reverse arm having its outer end engageable with the advance end of a bar as it comes from the pass rolls, means for pivotally mounting the reverse arm', motive power means for operating the arm, and means, controlled by the moving bar, for connecting the motive power means with the arm, whereby the arm is rotated and the path of travel of the bar is changed.

10. The combination with a pair of pass rolls, of a bar reverser comprising a reverse arm having its outer end engagea-ble with the advance end of a bar as it comes from the pass rolls, means for pivotally mounting the reverse arm, gear means connected with the arm, a motor, a clutch connecting the motor and the gear means, and means, controlled by the moving bar, for engaging the clutch.

11. The combination with a pair of pass rolls, of a bar reverser comprising a reverse arm having its outer end engageable with the advance end of a bar as it comes from the arm' may be returned to its initial position.

12. The combination with a pair of pam rolls of a bar reverser comprising a reverse arm having its outer end engageable with the advance end of a bar asV it comes from the pass rolls, means for pivotally mounting the reverse arm, gear means connected with the arm, al motor, a clutch connecting the motor and the gear means, means, controlled by the moving bar, for engaging the clutch, means, controlled by the movement of the arm, for disengaging the clutch, and means for returning the arm to its initial position.

13. The combination with a pair of pass rolls, of a bar reverser comprising a pivotally moimted reverse arm having its outer end engageable with the advance end of a bar as it comes from the pass rolls, means for rotating the arm to change the path of travel of the bar, and gripping means at the outer end of the arm, comprising a gripping head and gripping jaws carried by the head, and means governed by the jaws for causing the arm to be operated.'

14. The combination with a pair of pass rolls, of a bar reverser comprising a pivotally mounted reverse arm having its outer end engageable with theadvance end of a bar as it comes from the pass rolls, means for rotating the arm to change the path of travel of the bar, and gripping means at Vthe outer end of the arm, comprising a gripping head rotatably mounted in the outer end of the arm and gripping jaws carried f by the head, means governed by the jaws for causing the arm to be rotated, and turning means adjacent the arm and connected with the gripping head, whereby the gr1pping head will be rotated axially. L

15. The combination with a pair of pass rolls, of a bar reverser comprising a pivotally mountedv reverse arm having its outer end engageable with the advance end of a .moving bar as it comes from the pass rolls, gripping means at the outer end of the arm, motive power means for the arm, and electric means actuated by the advance end of the bar for causing the power means to be connected to the arm.

16. The combination with a pair of pass rolls, of a bar reverser comprising a pivv otally mounted reverse arm, a constantly rotating sourceof power, a clutch for connecting the source of power to the arm, means for engaging the clutch to operate the arm, means tor returning the arm to its initial position, said means being made acneeting the source of power to the arm,

means for engaging the clutch to operate the arm, a spring for returning the arm to its initial position, said spring being wound up as the arm is moved through its predetermined travel, and meansfor disengaging the clutch.

18. The combination with a pair of pass rolls, of a bal' reverser comprising a pivotally mounted reverse arm having its outer end engageable withv theadvanee end .of a har as it comes from the pass rollsfa constantly rotating source of power, a clutch for connecting the source of power to the arm, a solenoid for controlling the operation of the clutch, a soulee of eleetrie energy,

.a switch, eontrolledoby the advance end Vof `the bar, for causing the solenoid to be energized, and a de-energizing switch for openlng the circuit through the solenoid, and means for disengaging the clutch. v i

In testimony whereof, I have. hereunto signed my name.

HARRY B. ROSE;

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