US715853A - Draw-bench and sizing-rolls. - Google Patents

Description

` Patented Dec. I6, |902. P. C. PATTERSUN &. J. VJ. BAX.

DRAW BENCH AND SIZING ROLLS.

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No. 75,853. I Patented Dec. I6, |902.

P. C. PATTERSON &.VJ. J. BOAX. DRAW BENCH AND SIZING ROLLS.

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UNITED STATES 'n PATENT OFFICE',y

PETER O. PATTERSON AND JOHN J. BOAX, OF MCKEESPORT, PENNSYLVANIA, ASSIGNORS TO NATIONAL TUBE COMPANY, OF PITTSBURG, PENN SYLVA- NIA, A CORPORATION OF NEW JERSEY.

DRAW-BENCH AND SIZING-ROLLS.

SPECIFICATION formingpart of Letters Patent No. 715,853, dated December 16, 1902. Application llled February 25,1902. Serial N- 95,532. KNO model.)

To @ZZ whom, t may concern,.-

Be it known that we, PETER C. PATTERSON and JOHN J. BOAX, residents of McKeesport, in the county of Allegheny and State of Penn- Sylvania, have invented a new and useful Improvement in Draw-Benches and Sizing-Rolls; and we do hereby declare the following to be a full, clear, and exact description thereof.

Our invention relates to apparatus for form- Io ing butt-weld tubing, and more especially for forming such tubing of more than single standard length, although it is equally applicable for forming either butt or lap Weld tubing of any length. The object of our invention is to provide apparatus for this purpose whereby the tube after being welded is transferred to the sizing-trough and thence to the sizing-rolls entirely by mechanical means, thereby dispensing with the hand labor usuzo ally employed.

In the formation of butt-weld tubing the most approved practice is to charge flat plates into the furnace through the rear end thereof and after they have been raised to a welding heat to seize the front end of said plates with tongs or othersuitable pipe-drawing tool, slip a bell over said tongs, and then connect the latter to a suitable drawing apparatus, preferably a continuously running draw- 3o chain, whereby the plate is pulled out of the furnace and through the welding-bell, being thereby bent up into tubular form and having its edges butt-welded together. To insure a practically continuous operation of the welding apparatus, it is the practice to have a number of plates heating simultaneously in the furnace, said plates lying side by side upon the furnace-hearth. It is necessary to bring the plates in line with the drawing mech- 4o anism or the drawing mechanism in line with the plates in order to properly draw the latter out of the furnace. The latter construction is usually followed, and the draw-bench is either pivoted so thatits forward end can swing in front of the furnace or else the entire bench is made laterally movable in front of the furnace. From the draw-bench the tube passes to the sizing-trough,which is stationary and generally provided with power-driven 5o rollers which feed the tube to the sizing-rolls.

Aseries of telescoping rods or skids connects the stationary sizingtrough and movable draw-bench, and the practice is for a workman to seize one end of the tube and throw it from the bench onto the skids, on which it rolls to the sizing-trough. This results in somewhat bending the tube and always necessitates an additional workman. Furthermore, it has recently been proposed to form tubes of double standard lengths, thus mak- 6o ing tubes from thirty-eight to forty feet long. It is impossible to transfer such long tubes from the draw-bench to the skids by seizing the tube at one end, so that two workmen vwill be necessary to do the work. Furthermore, with such long tubes there is liability of bending or marring the same to such an extent as to form defective tubing.

The object of our invention is to overcome the foregoing difficulties and objections, and 7o to this endv we provide apparatus whereby the tube is 'transferred from the movable drawbench `to the stationary sizing-rolls by mechanical means entirely, thereby doing away with the hand labor now employed and making it possible to transfer tubes of any length without danger of injuring the same.

In carrying out our invention we connect the sizing-trough to the draw-bench, so as to be movable therewith, and provide suitable 8o mechanism, preferably chains, for transferring the pipe from the bench to the sizingtrough. From the sizing-trough the tube is guided by suitable means into the sizingrolls and goes thence to the straighteningrolls.

In the accompanying drawings, Figure l is a diagrammatic plan view of our invention. Fig. 2 is a cross-section of the apparatus, taken near the actuating-cylinders. Figs. 3, 9o 3a, and 3b show a plan of the apparatus on an enlarged scale. Figs. 4, 4a, and 4b show a side elevation on an enlarged scale, and Fig. 5 is a detailed sectional view of one of the cylinders. y The welding-furnace is shown at 1, and this may be of any preferred type, preferably being heated by gas and of the regenerative type, having the air and gas ports 2 at the sides of the hearth 3. This hearth is of suroo cient width to receive a series of plates 4 side by side, seven such plates being shown in the drawings; but the number may be either more or less, depending upon the size and thickness of the plates and the rapidity of the Welder. The front wall of the furnace is provided with the usual opening 5, through which the plates are withdrawn.

The drawing apparatus may be of any preferred type, that shown in the drawings comprising a bench 6, having a continuouslyrunning draw-chain 7, connected in the usual way to sprocket-wheels 8 at the ends of the bench. The rear sprocket-wheel S will be power-driven from any suitable source, such as the electric motor 9, which is connected to said sprocket-wheel by any suitable intermediate gearing. The usual monkey or hook will be used for connecting the tongs to the chain. The forward end of the bench will be provided with a suitable holder 10 for the welding-bell. This bench will preferably be movable in front of the furnace, so as to be brought into line with any of the plates in the furnace, and for this purpose the entire bench may be movable transversely; but preferably the bench will be of the pivoted type, as shown, being pivoted at its rear end at 11 and being mounted upon suitable rollers or supports 12, so that the forward end can swing in front of the furnace. The construction thus far described is old and well known and a further description thereof is not necessary.

The sizing-trough is shown at 13, and this may be of the usual construction and provided at intervals with the power-driven rollers 14 foi` feeding the tube forward. The sizing-rolls are shown at 15, substantially in line with the sizing-trough, and to the rear of these is another trough 16, leading to the straightening-rolls. All of t-hese parts may be of the usual const-ruction and need not be further described. Instead of making this sizing-trough stationary, as is now the practice, we connect the same to the bench 6, so as to be movable therewith. Any suitable connection that will secure this object may be used; but preferably the bench and sizingtrough are mounted on a single carriage. We have therefore provided a series of frames or housings 17, six being shown, whichconuect the draw-bench and sizing-trough and which are provided with the wheels 12, running upon the mill-door. These wheels are set at angles which vary in extent with the axle of each wheel pointing toward the pivotal point 11 of the bench and trough, so that the utmost freedom of movement is secured. The sizingtrough and draw-bench are also connected by a series of bars 20, sloping from the drawbench toward the sizing-trough. For transferring the tubes from the draw-bench to the sizing-trough we provide a series of chains 22, having fingers or projections 23 for engaging the tubes and passingatone end oversprocketwheels 24, journaled below the draw-bench,

and at their opposite ends over sprocket- Wheels 25, secured to a positively-driven shaft 26, mounted at the side of the sizing-trough and extending the entire length of the apparatus. These chains are guided by transverse bars 27, supported upon the longitudinal beams 28. The ends of the chains nearest the draw-bench are considerably below the top of said bench, as shown in Fig. 2, and the tubes will easily roll off the bench and down upon the inner ends of the transverse bars 20, whence they will roll onto the chains and be carried thereby and deposited in the sizing-trough 13.

The two central frames or housings 17 are extended beyond the sizing-trough and support a platform 30, upon which is mounted the motor or motors for driving the various mechanisms. We have shown for this purpose a single electric motor 3l, the armatureshaft of which is connected by suitable intermediate gearing with both the transferchains 22 and the rollers 14 in the sizingtrough. This intermediate gearing may be of various kinds and, as shown, comprises a pair of spur- gears 32 and 33, loosely mounted on the motor-shaft, one of which, as the gear 33, meshes with a gear 34 on a longitudinal shaft 35, provided with a series of beveled pinions 36, meshing with similar pinions secured to the shaft of the rollers 14. The gear 32 meshes with a gear 37, loosely mounted on the shaft 35 and connected by intermediate gears 3S and 39 with a gear 40, fast on the shaft 26, from which the transfer-chains are positively driven. The gears 32 and 33 are loosely mounted on the armature-shaft of the motor, but are adapted to be connected thereto by the clutches 43 and 44, so that the transfer-chains and the rollers 14 are at all times under the control of the operator. This is necessary from the fact that the tubes may have to be held in the sizing-trough waiting for the sizing or straightening-rollers to become vacant, and this may necessitate a holding of other tubes on the transfer-chains. The clutches will preferably be of the friction type, so that these mechanisms may be driven at slow speed, if desired. This is especially important with the transfer-chains, as said chains can by this means be driven very slowly or in an intermittent manner, so as to practically store up a number of tubes thereon.

As the sizing-trough swings with the bench, it will not always be directly in line with the sizing-rolls, but will be at various angles thereto. Consequently some means must be employed for guiding the tubes from the trough to the rolls. To this end the rear end of the trough is widened slightly, as shown at 46, and between the same and the sizingrolls is a funnel-shaped guide-spout 47, having its larger end directed toward the sizingtrough and of such a size as to receive the p ipe from the same, no matter at what angle the trough may be. The smaller end of the IOO IIO

guide is in proximity to the sizing-rolls and the aXis of said guide is directly in line with the pass of said rolls. This funnel 47 is preferably made in two sections united by the lugs and pins 49, and it is both vertically and laterally adjustable, the vertical adjustment being secured by mounting the same on the y upper ends of the screws 50, which project down through threaded collars 5l on the standards 52. The lateral adjustment is attained by securing the standards 52 to abaseplate 53 by means of T- headed bolts, the heads of which lie in undercut grooves 54 in said base-plate. To the rear of the sizingrolls is a straightening-nozzle 55, which is also vertically and laterally adjustable by the same means as described in connection with the guide-spout. This nozzle will receive the pipe from the sizing-rolls and straighten it sufficiently so that it will run easily in the straightening-trough 16.

The draw-bench and sizing-trough' may be swung about the pivot ll by any suitable power mechanism, and for this purpose we use hydraulic cylinders, two such rcylinders being shown at 56 and 57. These cylinders are of the usual single-acting type and are set in pits below the floor of the mill and have their piston-rods connected to suitable hangers on the draw-bench. Wehave shown the same connected to a hanging frame 58, secured to the lower side of the platform 30, the piston-rods of the two cylinders being connected to opposite sides of said hanger by universal joints 59. The inner ends of these piston-rods are connected to the pistons 60 by similar universal joints 6l, and to permit the swinging of the piston-rods without leakage a tube 62 is connected to the piston and projects through the stufng-box 63 in the head of the cylinder, said tube being of such length and diameter as to permit the full swing of the draw-bench. The cylinders 56 and 57 are not at right angles to the axis of the draw-bench; but each of said cylinders has its axis at right angles to a line drawn from the pivot 1l through the point at which the piston-rod of the corresponding cylinder is connected to the hanger 58. By this arrangement the cylinders` will always act in a direction to utilize their greatest efficiency,

and danger of bending the piston-rods is avoided.

The operation of the mechanism will be gathered from the foregoing description and need not be repeated here. Suffice it to say that the tube will be drawn in the ordinary way andthen rolled oif the bench onto the skids or supports 20, from which they will pass to the chains 22, and these chains will carry the tubes at any desired speed, either continuously or intermittently, dependingv upon the operation of the clutch 43, and deposit the same in the sizing-trough. From this trough the tubes will be conveyed by the power-driven rollers 14 to the sizing-rolls, being directed by the spout 47 into the pass of said rolls,I passing through and beingstraightened by the nozzle 54 at the rear thereof. Whenever the draw-bench is moved laterally, the sizing-trough is moved therewith, and the transfer mechanism operates the same in all positions of the bench. The operation of this mechanism is under the control of a single person stationed on the platform 30, and the usual hand labor in transferring the pipe is dispensed with. The telescoping skids now used, and which easily get out of repair, are also dispensed with, and liability of injuring the tubes by bending or otherwise is avoided.

What we claim is- 1. In apparatus for making butt-weld tubing, the combination with a furnace, of a draw-bench in front of the same, a sizingtrough and sizing-rolls, and power-operated transfer mechanism between the draw-bench and the trough for engaging the tubes and carrying them to and depositing them in the trough.

2. In apparatus for making butt-weld tubing, the combination with a furnace, of a draw-bench movable laterally in front of the same, a sizing-trough and sizing-rolls, and power-operated transfer mechanism between the draw-bench and trough for engaging the tubes and carrying them to and depositing them in the trough.

3. In apparatus for making butt-weld tubing, the combination with a furnace, of welding mechanism movable laterally in front of the same, a sizing-trough and sizing-rolls, and power-operated transfer mechanism carried by the laterally-movable welding mechanism for engaging the tubes and carrying them to and depositing them in the trough.

4. In apparatus for making butt-weld tubing, the combination with a furnace, of welding mechanism movable laterally in front of the same, a sizing-trough connected to and movable with the welding mechanism, and sizing-rolls mounted in stationary bearings.

5. In apparatus for making tubing,the combination with the furnace, of welding mechanism movable laterally in front of the same, and asizing-trough connected to and movable with said welding mechanism.

6. In apparatus for makingtubing, the coinbination with the furnace, of welding mechanism movable laterally in front of the same, a sizing-trough connected to and movable with said welding mechanism, and mechanism for transferring the tube from the welding mechanism to the sizing-trough.

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7. Inapparatus for making tubing, the combination with the furnace, of welding mechanism movable laterally in front of the same, a sizing-trough connected to and movable with said welding mechanism, and sizingrolls.

8. In apparatus for making tubing, thecombination with the furnace, of welding mechanism movable laterally in front of the same, a sizing-trough connected to and movable ,with said welding mechanism, mechanism for transferring the tube from the welding mechanism to the sizing-trough, and sizing-rolls.

9. In apparat-us for making tubing, the combination with the furnace, ofa welding-bench movable laterally in front of the same, a sizing-trough connected to and movable with said bench, sizing-rolls, and aguide between said trough and sizing-rolls.

10. In apparatus for making tubing, the combination with the furnace, of a weldingbench movable laterally in frontof the same, a sizing-trough connected to and movable with said bench, sizing-rolls, a guide-spout between said trough and rolls, and means for adjusting said spout vertically and laterally.

11. In apparatus for making tubing, the combination with the furnace, of a weldingbench movable laterally in front of the same, a sizing-trough connected to and movable with said bench, sizing-rolls, a guide-spout between the trough and rolls, and a straightening-nozzle to the rear of said rolls.

12. In apparatus for making tubing, the combination with the furnace, of a pivoted Welding-bench in front of the same, asizingtrough connected to and movable with said bench, and mechanism for transferring the tube from said bench to said trough.

13. In apparatus for making tubing, the combination with the furnace, of a pivoted welding-bench in front of the same, a sizingtrough connected to and movable with said bench, stationary sizing-rolls, and means for guiding the tube from said trough to said rolls.

14. In apparatus for forming tubing, the combination with the furnace, of a weldingbench movable laterally in front of the same, a sizing-trough connected to and movable with said bench, and power-driven chains for transferring the tube from the bench to the trough.

15. In apparatus for making tubing, the combination with the furnace, of a Weldingbench movable laterally in front of the same, a sizing-trough connected to and movable with said bench, power-driven feeding-rollers in said trough, and power-driven chains for transferring the tube from the bench to the trough.

16. In apparatus for making tubing, the combination with the furnace, of a weldingbench movable laterallyin front of the same, a sizing-trough connected to and movable with said bench, power -driven chains for transferring the pipe from the bench to the trough, a motor mounted on said bench, and suitable gearing between said motor and said chains.

17. In apparatus for making tubing, the combination with the furnace, of a Weldingbench movable laterally in front of the same, l

a sizing-trough connected to and movable with said bench,feedingrollers in said trough, a motor mounted on the bench, and gearing between said motor and said rollers.

1S. In apparatus for making tubing, the combination with the furnace, of a weldingbench movable laterally in front of the same, a sizing-trough connected to and movable with said bench,feedingrollers in said sizingtrough, chains or the like for transferring the tube from the bench to the trough, a motor mounted on said bench, gearing between said motor and said chains and between said motor and the rollers in said trough, and clutches in each of said trains of gearing.

19. In apparatus for forming tubing, the combination with the furnace, of a Weldingbench movable laterally in front of the same, a sizing-trough connected to and movable with said bench, and hydraulic cylinders for swinging said draw-bench, said cylinders being connected to the bench and trough near their middle.

20. In apparatus for forming tubing, the combination with the furnace, of a weldingbench in front of the same and pivoted at the center line of said bench, a sizing-trough secured to one side of said bench and moving therewith, and hydraulic cylinders having their piston-rods connected to the bench and trough at one side of the axis of the bench, the axis of each of said cylinders being at right angles to a line drawn from the pivotal point of the bench to the points of attachment of the piston-rods of the respective cylinders to said bench.

2l. In apparatus for forming tubing, the combination with the furnace, of a combined draw-bench, sizing-trough and transferring mechanism, and wheels upon which the same are mounted,said combined bench and trough being pivoted at the center line of the bench and said wheels having their axles pointing toward said pivot.

22. In apparatus for forming tubing, the combination with the furnace, of a pivotal welding-bench in front of the same, a hydraulic cylinder having its piston-rod connected to said bench, universal connections between said piston-rod and the bench and the piston-rod and the piston, and a tube connected to the piston to surround the pistonrod and projecting through the head of the cylinder.

In testimony whereof we, the said PETER C. PATTERSON and JOHN J. BOAX,have hereunto set our hands.

PETER C. PATTERSON. JOHN J. BOAX. Vitnesses:

ROBERT C. TOTTEN, F. W. WINTER.

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