US1469085A - Turntable - Google Patents

Description

sept.- z5,` 1923. f lssgoss c. w. HAWTHORNE ET AL TRNTABLE -md March 12. 1920 2 sheets-sheet 1 Sept. 25, 1923..

1,469;ofs5 C. W. HAWTHORNE ET AL l TURNTABLE Filed March 12 1920 2 'Shalom-Shoot 2 .tatented Sept. 25, i923.

CHARLES W. HAWTHORNE AND GEORGE J. RENQI'IE, OF fll'J'FFliIiO, NEW YORK.

TURNTABLE. y

iippiieaiiori ined` Marcil i2, i920. seriai No. eeai'zo.

.To @ZZ iii/tom t may concern.'

Be it known that we, CHARLES Vf. Haw- THoRNn and-GEORGE J. RENNIE, citizens of the United States of America, and residents of the city of Buffalo, county of Erie, and

State of New yYork,`have invented certain new and useful Improvements in Turntables, of which the following is a full, clear, and exact description. A Uur invention relates generally to turn tables and more particularly to that type of turn table used in rolling mill practice.

It is well known that steel ingots are larger at one end than at the other, due to the draft in the mold. These ingots, as

lthey come'froin the reheating furnace, are

alternately arranged with respect to their larger ends. If the larger end is fed to the rolling mill, serious damage to the rolling mill is very apt to result.

The principal object .of this invention has been to provide means, which may be located in the furnace run table and by which 'the ingots, as they come from the furnace, may be turnedend for end, so that each ingot may be fed to the rolling mill with its smaller end toward the mill.

Another object has been to provide a device of this character which shall be very compact in its design; one which shall not Avrequire an abnormal elevation ofthe ingot in turning, thereby greatlyeconomizing in time; and one which is eflicient in operation and easily controlled.

The above objectsand advantages have been accomplished by the device shown in the accompanying drawings, of which:

Fig. 1 is a vertical, sectional elevation of our device, showing it installed in a furnace run table.

F ig. 2 'is a sectional elevation of the same taken on line 2-2 of Fig. 1.

Fig. 8 shows-a diagrammatical development of the cylinder, of our device with its cam surfaces.

In the drawings 5 represents the I-beam and 6 the rollers of'a furnace run table. These rollers are, ofcourse, provided with the usual bearings and means for driving them, but these bearings and driving means, for clearness, have been omitted from the this annular groove. inder will not be sealed against the admisdrawings. 7 are the guides of the runtable.

Secured to the .li-beams 5 of the run .table is a supporting yokeV 8. 9 is the plunger of our device wliichhas the lower fend `'of its stem-10 disposed in and supported by the supporting yoke 8. A11 is the cylinder of our devicew'hichis rotatably and slidabl'ydisposed about the plunger 9. The-portion 12 of the cylinder is boredVV to fit the stem 10 of the plunger and the lower end ofthe cylinder is provided witlija packing gland 4, whereby the joint between the plunger stem and the cylinder is properly sealed. The upperv portion ofthe cylinder 10 is counterbored at 34.1 and the plunger headV 13 is disposed in this counterbore. rlhe upper end of the plunger head 13 is provided with suit-' V able packing washers 14 and 15, held in place by a nut 16, screw threaded to-theupi-oerl chamber 21 having considerably less crossprovided above the plunger head13 and a sectional area is provided below the plunger.

head 13. Arranged centrally through the plungerstem 10 is av recess 22 which extends from the bottom ofthe plunger tov a point near.; its upper end. A port 23 extends from this recess 22 to the outside of the plunger stein 10 whereby `the recessis in communication with the chamber 21. An annular groove 24F is preferably `provided at the point of union of the head 13 with the stein 10 of the plunger, and the port23 preferably opens into By this means the cylsionof fluid when it is in its: uppermost position. A' screw threaded aperture 25 eX- tends from the upper end of the recess -22 to the. upper-end .of thevplunger head 13V and opens into the chamber 20. A pipe 26, having its upper end screw threaded,` i's passed up through the recess 22 and Vis' screw threaded into the aperture 25. A'T-iitting 27 .isM passed through the bottom ofthe supporting yoke 8 Aand is screw threaded Yintothe lower end of the plunger stem 10, thus lplacing the T-ltting and its branch 23 in communication with the lower end of the-recess 22 and the plunger stem. The pipe 26 is passed through the T-ttingl and is suitably packed at the` lower end of the fitting by means ofV a stuffing-box having a packing gland 29.Y At the lower end of the pipe 26 is disposed preferably a three-way valve 30. A pper3l for conducting. fluid under pressure anda pipe 32 for carrying away thepdischarge fluid are connected to the valve 30. By means of the handle 33 ot the valve, iluid under pressure may be lconducted to the chamber 2O or may be discharged therefrom, depending upon the Vposition o'l the handle v33. Suitable .piping is connected to the branch 273 ofV the T-fittingV 27 whereby fluid yis conducted to the chamber 2l. VFor reasons7 to be hereinafter stated, the pressure Within the chamber 21 mayy be constantly' Vmainl tained.

Arranged about the outer circumference of the cylinder 11 is a plurality otcams by which the cylinder is rotated as it is raised and lowered. So asto reduce the necessary amount of travel,`we have arranged the cam so that the cylinder is rotated. through substantially one-halt' of its predetermined travel during its upward movement and the other half of its predetermined travel dun ing its downward movement. in Fig. 3

Y where we show a development of the cylinder cams, 35, 36, 37 and33 are the cams, 35 and 37 being alike and arranged diametrically opposite each other and 36 and 33 being alike and also arranged diametrically opposite eachother. The upper end ofthe cylin#v der is supported `by a stationary bearing yoke 39, carried by the -beains 5 of the furnace run table. The outer surfaces oi the earns 35, 36, 37 and 38. are finished so as to bear against the central bore 40 of the bean ing yoke 39, thus providing lbearings for the cylinder. Additional bearings for the cylinder are provided by the ribs 41, 42, 43 and 44.

'Rigidly carried by the bearing yoke 39 are two oppositely arranged and radially disposed shafts 45, each secured in position preferablyV by means of a bolt 46. 0n the inner peripherally reduced end 47 oi2 each of these shafts is rotatably mounted a roller 48. rl`he outer periphery ot the roller is preferably beveled to such a degree that its sides in a horizontal plane are substantially radial. These rollers are arrangedV to engage Vwith the cams 35, 36, 37 and' 38 and to piroduce the rotary motion of the cylinder as it is being raised and lowered. f

The top of the turn table bed 19 is, of course, arranged slightly below the upper edges of the rollers 6 of therun table. Furthermore, it isV necessary that the billets be moved verticallylin order to clear they 7 of the run table-betere it is turned. For

convenience, -we will describe thev action oV the cams 35 and 36 in connection with one of the rollers 48 only,it Vbeing obvious that the saine action is produced by the cams 37 and A V33 in connection with the other roller; y

In Fig. 3, the broken circular' lines repre- 'Y sent the' positions of the rollers relative to theY cani surfaces; and, by reference to the representation ofthe roller atA the YeXtreme left of Fig. 3, it will be seen thatithe cam 35 tance from the upper end oit the cylinder, whereby, when the cylinder is moved up# wardly, it will travel a considerable ydistance without rotating, whereby the billet carried by the table will clearithe guides7betore it vis turned. J ust as soon as the roller Vis in the relative positionk represented( by the circle 48a, it will strikeA the upper surfaces' or" thev cam 35 and the cylinder willjbefrotated through substantially one-.haltet` its prede termined travel or to a point where the'roller has reached the position-shown by theycir'cle 43h. The cam 36 is arranged so that its lower end slightly overlaps the lower end oit' thecami 35 and is arranged arenoug'h aboverthev cam 35 to allow the roller, x'vhen'traveling over th-e last mentioned cam, to lpass freely beneath the lower end of the cam 36.` The.

lower end of the cam 36, however, extends over` far enough so as toeng'age with the roller when it occupies the relative position I shown by vcircle 48'. As the' cylinder moves downwardly the distance representedfby the relative positions of circles 48b andf43c, it will move in a straightl line. When, however, the roller is in theI relative -position shown by the circle 443C, it willV engage with the lower lsurface of thecani 36 and cause the cylinder to rotate through substantially the other halt of its predetermined travel or to aposition'where Vthe lowerl end: occupies the Vrelative Vposition shown' by 'the broken circle 48d. The angularly arranged y'tace oi the cam 36 stops at some distance Vfrom'the'A Y end of travel of the cylinder, so that the ro'-VV tation of the cylinder will have been coin- Vpleted before the billet reaches'the point where it must be lowered without being r'otated. After' the'r'oller has reached the end" of this angularlyarranged *surfacev of the cani 36 (the relative position shown by thev broken circle 48d), the cylinder will be vis arranged with its upper end at some dis? of .the Vcam; 3.5, and is located tlier'efroina sufficient distance'to permit the freepassage of. the rollers eSThe' cam 3 5 is, ot course, ar-, rangedin a similar mannerwithrespect to the cani 38. i

As herei-nbefcre statedpthe brafnohQS of he l -r'ltting 27 is connected with iuid under pressure, and Vthepipe'hpconnected with with fluidV under' pressure.

the chainber-Ql-inay be maintained ',con-

stantly under hydraulic pressure, so that when the pressure in chamber 20 is released,

the cylinder will be automaticallyreturned to its lowermost position lby the pressure. within thev chamber 2l combined with the weight 'of theV cylinder and the billet which it supports. Vif hen the cylinder is in, the position shown in the drawings, 4it will be maintained in its lowermost position by its Vweight and also by the pressure which is exerted within the chamber 21. When the handle 33 of the three-way valve -SO'is now operated to allow the luid under pressure coming from the pipe 3l to enter the pipe 26 and chaniberQO, the pressure within the chamber 2l will lbe overcome and the cylinde'r will be elevated until the Vlower edge ol the plunger head 13 comes in Contact the handle 33 is nowoper-ated so as to connectthe pipe 26 withfthe discharge pipe' S2, the constant pressure withiny the recess 22 in the plunger stem?k 10, together with the weight of the cylinder and supported billet, will cause the cylinderto be moved downwardly to its lowermost position. During the upward and downward movements of the cylinder.,` as hereinbetore de-l scribed, the cylinder with its billet Vwill have been rotated through its entire predetermined travel.

lVhilc we have shown the use of hydraulic pressure for operating the cylinder and have described the chamber 2l as'being maintained under constant hydraulic pressure, it is obvious that the pressure may be controlled by a suitable valve' inbOth of the chambers or the cylinder may be raised and lowered by any other v suitable means. rlhese and other modifications el the details herein shown and describedV may be made without departing from the spirit of our invention or the scope of the apk ended l claims, andvwe do not, therefore, wish to l. A turn table comprising a. vertically its upward and downwardtravel.

supportedv plunger, a;cylinderfslidably sup-'f ported by; the' plunger, a bed Vcarried] by :the cylinder, hydraulicjmeans fory raising and lowering the cylinder, 'and cam meanscan.y Y liedbythe cylinderV andfarranged: nii-lits exterior-surface torrturning'the cylinder.v`

A :tur-n table.V comprising '-avertically 1- l s iippcrted plunger, Vajeylinder slidably'isupported bytheY plunger, abed carried the; fi

cylinder,'me ans for raising and lowering the cylinder, a plurality of disconnected cams and means co-acting witlithecains, where``v by the lgcylinder'` is vrotated raised vand lowered. Y, l

. A. Vturn table comprising Vaf vertically ffm arranged on .the exteriorjof the cylinder,

as itisy being L.

supported plunger, a lcylinder slida-bly'supf cylinder, means for raising andlowering the cylinder, cams formed on the exterior oi'f the cylinder, andstationarily arranged rollers engageable with the cams, 'whereby` rotated as itifis .beingV raised the cylinder is and lowered.

4. A.. turn table comprising avertically supported plunger Ahaving a central'open ing restricted at its upper end and a re-V duced lower portion, a cylinder slidably supported by the plunger, a bed carried Y,by the cylinder, av pipe extending through Vthe y Y ,opening and secured'in the restrictede-nd with the portion 12 ofthe cylinder. Vhen thereof, .whereby the cylinder may befraised the plunger, Ameans connected vto the lower "ported by the plunger, abed carried by the Y I eef end oi" the opening, whereby the 'cylinder may be positively lowered by hydraulic;

pressure, and means controlled by the axial movement of the cylinderV for rotating the cylinder.V l

5. A'turn table comprising a vertically supported plunger, a cylinder slidably supn ported by the plunger, a bed carried by the cylinder, means for raising and lowering the cylinder, ka bearing yoke for the cylin- Y der, rollers carried by the yoke, .cams formed en the cylinder and engageable with the rollers, whereby thecylinder isrotated as it is being raised' and lowered.

6. Aturn table lcomprising a vertically supported plunger, a head lfor the plunger,

acylinder supported by the'plungena bed carried by the cylinder, thus forming ,a

chamber aboveV the plunger head and also a chamber below the plunger head ot less,v

cross-sectional area than the upper chainber, means for conducting fluid under pressure to the chambers, and means carried by the cylinder for turning the saine during 7. A turn table comprising a vertically supported plunger,y a head for the plunger, cylindersupported bynthe plunger,V a bed i I f 1,46

carled bj; 'the cylinder, thus forming a chamber abovefthe plunger head and also 'aV chambe'below' the plunger head 0f less` ci0s-setoual-arerwthan thei upper chiun-V beffmeans for Conductl'ng uld under pres Vformed on the cylinder andengageabl,e'Wilth'` Vthe iollers, whereby'fthe Cylinder sfrotated as 'it is being raised' andlowered. s 1,10 Intestmony whereof, rWhavehereuntoV Y signed our'V names. y V V GEORGE R-ENNIEQL V- CHARLES QW.' )HAWTHORNE "fi

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