US2632346A - Bar turning device - Google Patents

Description

Z 6 1 w w u 0 .r I m] n 2 m d A .m 6 W; WY 4 J B mm W -Ili March 24, 1953 Filed July 15 1949 I I I March 24, 1953 E. T. PETERSON 2,632,346

BAR TURNING DEVICE Filed July 13, 1949 4 Sheets-Sheet 2 47 I "5/ I IV/Z6 INVENTOR March 24, 1953 E. 1-. PETERSON BAR TURNING DEVICE Filed July 15, 1949 Y 4 Sheets-Sheet 5 INVENTOR rd y zvvorq ATTORNEB E. T. PETERSON BAR TURNING DEVICE March 24, 1953 4 Sheets-Sheet 4 Filed July 15, 1949 Egg ATTORNEYS Patented Mar. 24, 1953 BAR TURNING DEVICE Edward '1. Peterson, Reading, '-Pa., assignor "to.

Birdsboro Steel Foundry and. Machine Com.- pany, ;Birdsboro,gPa., a corporation ofPennsyb vania Application July-13', 1949,]Serial1No. 104,425

" (o1. so .53)

4 Claims. 1

The present invention relates to turning do vices for rolling mill use, especially'to roller do vices capable of operating on moving bars.

A purpose-f the invention is turn a bar trav elling along a mill-table through a suitable angle on an axis within the stock for-the purpose-oi correctly entering the bar into a, wire guide or into a grooved roll.

A further purpose is to turn a bar as it-travels continuously through the rollers of a turning device.

A further purpose is to mount gripping rollers on a hollow trunnion, to support the trunnion on a trunnion hearing or bearings and to rotate the gripping rollers "and the trunnion by a thrustor desirably set in operation at the exact time of the entry of the stock into the grip- Ding rollers.

"Further purposes appearin the specifications and. in the claims.

' The drawings illustrate one only of the .numerous embodiments in which the invention may appear, the form shown being selected from the standpoints of convenience in illustration, satisfactory operation and clear demonstration of the principles involved.

Figure .1 is a side elevationof the turning device of the presentinvention.

Figure 2 is .a rear end elevation .oiFigure -.1.

Figure. 3 is a top plan-view of, Figure. .1.

Figure 4 is a section through the trunnion .on the line 4-4 of Figure 3.

Figure 5 is a circuit diagram and hydraulic diagramillustrating the. operation.

In .the drawings like. numbers. refer to like being rolled has in many cases been eccomplished by hand. In other instances a movin side guard and fingerlift has bee-n employed to accomplish the turning movement. Various other manipulators have been devised, which require gripping of the -material being rolled while it is substantially stationary and turnin the material being rolled.

"The various prior art turning procedures are generally subject to the disadvantage thatit is necessary to operate on the material being rolled whenit is stationary or moving very slowly, and thus ingeneral it is usually not possible'to turn the material being rolled reliably and effectivelybetween passes on high speed continuous mills. An effort to overcome this diiiiculty has been made by passing the billet through a passage having stationary channels which impart a twist. with limited success, due to great loss of speed, and "with considerable danger of abrading and tearing the outer surfaces as the material beingrolled encounters the screw channels.

In accordance with the present invention a turning device has been developed which is caliable. of operating on moving stock between passes on a. continuous rolling mill .or under other conditions .in which a high speed ,ofjforward progression .is being maintained. ,By proper adjustment the turning can be accomplished even where the bar is of comparatively short, length moving athigh speed, and therefore remains in therollers only fora very short time. No appreciable marringof the outersun face of the bar occurs, and the device is not limited by the speed of forward progression.

The bar passes longitudinally through a space 2.0 between .aplu-rality,preferably a pair if-grippingrollersZ i and; 2,2. Therollers are desirably grooved at 23 and. the grooving may have any suitable contour. The rollers are mounted on shafts 2.4 which are-pivoted to; idle freely on antifriction bearings25 supported in a trunnion 26.. The bearings :are held by caps 21 ,heldin laccby screws 28 and theends .of the-anti-irictionbear ingsareenclosed by covers 30.

The trunnion has a passage 3 extending lonitudinallyfrom end to end andhas a centerrecess 32 in which the rollers operate. Forwardly and rearwardly of the rollers on the trunnion are trunnion bearing surfaces 33 suitably on the same axis as the longitudinal axis of the bar going through between the rollers andrrockably supported in trunnion bearings 34 on aframe .35. The trunnion bearingshave caps 36 held in lace by studs 37. Y

The passage 3! through'the trunnion is ap proaohedat-the forward end by a belled" inlet portion 38,genera1ly conical inform, and, at the rearward end has a further belled outlet portion Mt and a straight portion M- at-the extremerear.

A collar 42 forms the forward portion of the trunnion and a collar 42' forms the extreme rearward portion. A funnel shaped guide 43 is stationarily mounted on the frame behind the trunnion.

Secured desirably integrally to the trunnion at its rear end is a crank 44 extending radially outwardly and pivotally connecting at 45 at its outer end with links 46. The opposite ends of the links 46 pivotally connect at 41 with a crank 48 fixed on a crank shaft 50 having bearing support at in the frame. The crank shaft 50 carries secured thereto spaced cranks 52 which pivotally connect at 53 to pull rods 54. The shaft is counterweighted at 50'. The pull rods pivotally connect at their upper ends with a cross brace 55 which is mounted on dual piston rods 56 of a thrustor 51. The thrustor 51 may be of any of the well known types, conveniently consisting of a cylinder 58 (Figure 5) having a piston 66 which is I urged bya spring 6! toward its downward position and raised by hydraulic fluid, suitably oil, passing through a ipe 62 from a reservoir 63 under the action of a pump 6%. The pump may desirably be a centrifugal pump, in which case the return of the hydraulic fluid when the pump ceases to operate can occur through the pipe 62, going back to the reservoir. The reservoir is desirably connected to atmosphere through a check valve 65.

' The pump is suitably driven by an electric motor 66 connected to a source of electric current 61 by a switch 68. The switch is of the well known flag switch type having an operating flag which is positioned in the path of the bar a short distance, suitably a few feet,.ahead of the turning device, so that the thrustor will begin to operate to overcome the inertia of the moving parts before the bar actually reaches the gripping rollers, and thus it will be possible to turn the gripping rollers through approximately 90 during the short time that the bar is moving through them. In this way the device is able to operate as a moving turning device or manipulator. The usual position for the mechanism will be on the center line of the enterin roll pass and a certain distance ahead of the roll stand to give the turning device time to complete its turning motion before the moving bar enters the wire guide of the roll stand.

In operation, as the bar approaches from the previous pass it encounters the flag 16 and closes the switch 68, starting the motor 66 which operates the pump 64 and begins to introduce hydraulic fluid into the cylinder 58 to raise the piston 66 and to force the dual piston rods 56 upward. This raises the pull rods 54, turning the cranks 52 and turning the shaft 50. The shaft swings the crank 56 and through it the links 46 to swing the trunnion in the trunnion bearings through an angle suitably 90. The turning of the trunnion turns the rollers mounted thereon, and since the rollers grip the bar as soon as it reaches them, the billet is likewise turned.

The timing is adjusted so that the operation of the thrustor prior to the time that the billet reaches the rollers is sufficient merely to overcome inertia without extensive angular motion of the trunnion, so that substantially all of the angle motion occurs while the billet is travelling through the rollers, and is therefore converted into turning movement by the rollers. As soon as the billet leaves the flag the switch 68 opens, but the bar will leave the rollers before there 4 has been time for the thrustor to return to starting position.

It will be evident that the device can also be employed on stationary or slowly moving bars by hand closing of the switch 68, in which case it will not be necessary to start the operation of the thrustor in advance of the entry ofthe billet into the rollers. Likewise when the sectional reduction of the stock has extended far enough so that the stock is of great length, even though it may be moving at high speed, it may not in all cases be necessary to start the operation of the thrustor in advance of the entry of the bar into the rollers.

It will be evident that the thrustor has the advantage over other driving devices that it gives very rapid operation, since a considerable amount of energy is available to turn the trunnion.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need will doubtless become evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the process and apparatus shown, and I, therefore, claim all such insofar as they fall within the reasonable spirit and scope of my claims.

Having thus described my invention What I claim as new and desire to secure by Letters Patent is:

1. In a bar turning device, a pair of cooperating turner rollers adapted to engage a bar moving forward, a trunnion rotatably supporting the rollers and rockable about an axis longitudinal of a bar passing through the rollers, a trunnion bearing rockably supporting the trunnion, a thrustor, an electric drive for the thrustor, a switch contacted by the bar in advance of the rollers, an electric circuit including the switch and the drive, and levers for connecting the thrustor and trunnion.

2. In a bar turning device, a set of rollers rotatable on axes transverse to the motion of a bar and positioned on opposite sides of the path of the bar in position to grip the bar, a hollow trunnion having two bearings for each roller and having two trunnion surfaces, one forward and one rearward of the rollers, trunnion bearings for each trunnion surface, a thrustor, an electric drive for the thrustor, a switch contacted by the bar in advance of the rollers, an electric circuit including the switch and the drive, and levers for connecting the thrustor and the trunnion.

3. In a bar turning device, a pair of cooperating turner rollers adapted to engage a bar moving forward, a trunnion rotatably supporting the rollers and rockable about an axis longitudinal of a bar passing through the rollers, a trunnion bearing rockably supporting the trunnion, stroke mechanism operatively connected to the trunnion and having an angular throw of approximately on the trunnion within a time less than the time of travel of the bar through the turner rollers, and a tripping device actuated by the bar as it travels toward the turner rollers and operativly connected to the stroke mechanism for energizing the stroke mechanism.

4. In a bar turning device, a set of turner rollers rotatable on axes transverse to the motion of a bar and positioned on opposite sides of the path of the bar in position to grip the bar, a hollow trunnion having two bearings for each roller and having two trunnion surfaces, one forward and one rearward of the rollers, trunnion bearings supporting the trunnion surfaces, a

thrustor reciprocable over a stroke, levers con- 5 meeting the thrustor and the trunnion and angu- UNITED STATES PATENTS larly throwing the trunnion through a stroke of Number Name Date 90 as the thrustor moves through its stroke, and 1,157,378 Geer 19, 1915 a tripping device placed in the path of the bar 1,423,856 Jupp et a1 Julyzs, 1922 before it reaches the turner rollers and oper- 5 1,567,375 Mccaslin 29, 1925 atively connected to the thrustor to actuate the 2,023,913 Carroll 10, 1935 thruster.

EDWARD T. PETERSON.

REFERENCES CITED 10 The following references are of record in the file of this patent:

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