US762124A

US762124A - Draw-bench with tongs-returning device.

Info

Publication number: US762124A
Application number: US10219202A
Authority: US
Inventors: John J Boax
Original assignee: National Tube Co
Current assignee: National Tube Co; Zoetis Services LLC
Priority date: 1902-04-10
Filing date: 1902-04-10
Publication date: 1904-06-07
Anticipated expiration: 1921-06-07

Description

No 762,124. PATBNTBD JUNE 7, 1904.

J. J. BOAX- DEA W BENCH WITH TONGS RETURNING DEVICE.

APPLIUATION FILED APR. 10, 1902.

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PATENTED JUNE 7, 1904.

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DRAW BENCH WITH TONGS RETURNING DEVICE.

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APPLICATION FILED APR. 10. 1902.

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No. 762,124. PATENTED JUNE 7, 1904.

J. J. BOAX. DRAW BENCH WITH TONGS RETURNING DEVIGE.

APPLICATION FILED APR.10. 1902.,

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UNITED STATES Patented June '7, 1904.

PATENT OEEIcE.

JOHN J. BOAX, OF' MOKEESPORT, PENNSYLVANIA, ASSIGNOR TO NATIONAL TUBE COMPANY.

DRAW-BENCH WITH TONGS-RETURNING DEVICE.

SPECIFICATION forming part of Letters Patent No. 762,124, dated June 7, 1904,

Application filed April 10, 1902,

To all whom it may concern:

Be it known that I, JOHN J. BOAX, a resident of McKeesport, in the county of Allegheny and State of Pennsylvania; have invented a new and useful Improvement in Draw-Benches with Tongs-Returning Devices; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to metal-drawing apparatus, and more especially to apparatus for drawing tube-blanks out of a welding-furnace through bells or the like to form butt-weld tubing.

The object of my invention is to improve apparatus of this character by providing mechanism whereby the tongs, gripper, hook, or other means used for attaching the tube or other blank to the drawing mechanism is returned to the front end of the drawing apparatus.

According to the most approved present practice of making butt-weld tubing the blanks are charged into a furnace and after having been raised to a welding heat are seized by means of tongs or like pipe-drawing tool, which is inserted through an opening in the front end of the furnace. A welding-bell is slipped over the reins of the tongs, and the latter is then connected, by means of a hook, buggy, or the like, to suitable drawing mechanism, preferably to a continuously-traveling I draw-chain, by means of which the plate is drawn out of the furnace and through the key, as it is called, which takes into the links ofthe chain, and when the tube has been drawn succeeding plates.

overheating the plates.

. make butt-weld tubing in double-standard Serial No. 102,192. (No model.)

lengths, in which case the difficulties would be increased by reason of the greater distance through which and greater speed at which the buggy-boy must travel, and it may be found necessary with the old mechanism to employ two buggy-boys for a single double-length draw-bench.

The object of my invention is to improve apparatus for drawing metal articles in general, and more especially for drawing blanks out of a welding-furnace through a bell to form butt-weld tubing by providing mechanism whereby the tongs, grippers, hooks, and

other means for attaching the blank to the drawing mechanism are returned to the front of the furnace, so as to be at hand when needed by the welder, thus preventing delay in grasping the plate and pulling it out of the furnace, increasing the output and preventing the overheating of the blanks, relieving the buggyboy of a part of the work, and necessitating the employment of a less number of boys.

To this end my invention consists in providing, in connection with the usual or any ap proved drawing mechanism, a conveyer for returning the tongs, hooks, and other connecting means to the front end of the drawing mechanism, which conveyer preferably will be located on the draw-bench at the side of the usual draw-chain and driven from the latter.

In the accompanying drawings, Figures 1 and 1 are a plan View of one form of my apparatus. Figs. 2 and 2 are side views thereof. Fig. 3 is a vertical longitudinal section through the forward end of the same. Figs. 4, 5, and 6 are transverse sections on the lines 4 i, 5 5, and 6 6, respectively, Fig. 3; and Fig. 7 illustrates the usual tongs and hooks employed.

My invention, as heretofore stated, applies to metal-drawing apparatus in general, but more especially to apparatus for manufacturing butt-weld tubing, and as it can be as well illustrated in connection with the latter I will so describe it. Any suitable welding-furnace in which the plates or blanks are raised to suitable welding heat may be employed, the furnace preferably being heated by gas and of the regenerative type. This furnace is shown at 1., having the hearth 2 and the usual regenerator-ports at the sides thereof. The hearth will be of suflicient width to contain the necessary number of blanks 3 to keep the drawing apparatus in practically continuous operation. In the front end of the furnace is a suitable opening or openings 4, through which the blanks are drawn out of the furnace.

The drawing mechanism may be of any de sired type and may be either stationary or movable laterally in front of the furnace, so as to be brought into line with any one of the blanks in the furnace. I have illustrated as suitable for my purpose a swinging drawbench 6, pivoted at 7 and provided with the usual draw chain 8, running over an idle sprocket-wheel 9 at the front end of the bench and a driven sprocket-wheel 10 at the rear end of the bench, the latter being driven by any suitable or convenient mechanism as, for instance, from the electric motor 12. The front end of the bench will be provided with suitable holders 13 for the .usual bell 14. As a convenient means for attaching the tubeblanks to the d raw-chain, I may employ tongs 15 of any approved type and the hook or monkey 16. The parts so far described are or may be of v'vell-known construction, and the specific forms illustrated and described have been selected because they are the ones most commonly used for this purpose and serve equally as well as any other for illustrating my invention.

In the use of the apparatus so far described the plates or other blanks 3 when raised to a welding heat will be seized by the tongs, a bell slipped over the reins of the latter, and said reins connected, by means of the hook 16, to the draw-chain 8, by means of which the plate will be drawn out of the furnace through the bell, and thereby bent into tubular form, with its edges butt-welded together. As soon as the tube has been drawn through the bell the tongs are disengaged therefrom, and both the tongs and hook must be returned to the front end of the bench, the tongs being placed in a water tank or bosh to cool and the hook being used for drawing the next succeeding blank. l-Ieretofore the hook has been returned by the buggy-boy and the tongs by another boy. I provide mechanism for doing this work. This mechanism may be of various forms, but with the particular bench illustrated it can conveniently be applied by providing on the side of the bench a conveyer which will carry the tongs and hooks back to the forward end of the bench. This conveyer consists, preferably, of atrough 18, formed on the side of the bench and in which runs an endless conveyer chain or belt 19, which passes over suitable sprocket-wheels or the like and 21 at the front and rear ends of the conveyer, and one of which, preferably the forward one 20, is positively driven as, for instance, by

having its shaft connected by the spur-

gears

22 and 23 to the shaft of the sprocket-wheel 9. As the latter is constantly driven by means of the draw-chain, the conveyer chain or belt 19 will be positively driven, but in a direction opposite to that of the draw-chain. The upper reach of the conveyer-ehain 19 will be supported by the bottom of the trough 18, while the lower reach thereof will be supported at intervals by idle rollers or wheels 24, secured to the bench. The tongs, hooks, and like connecting means after being disengaged from a drawn tube will be placed on the conveyer chain or belt and will be carried thereby back to the forward end of the bench. The floor of the trough near its forward end rises or slopes upwardly, so that the tongs or hook will be carried up the same and deposited in the widened and elevated portion 26 of the trough. If desired, a ledge or guide 27, having an oblique edge, may be placed just over the conveyer-chain near its forward end and will push the tongs or hooks off the chain onto the widened floor of the trough. The tank or bosh for cooling the tongs preferably will be placed at the rear end of the bench, as at 28, and as soon as the tongs and hook are disengaged from the tube the former will be placed in the bosh to cool, while the hook will be placed at once upon the conveyerchain and returned to the front of the furnace and the tongues will be returned as soon as they are cooled. It is understood, of course, that a suflicient number of tongs will be provided to insure a cool pair of tongs being at the front end of the bench whenever needed by the welder, and also that a sufficient number of hooks will be provided, so that one will always be at the front end of the bench when req ui red.

The operation of my mechanism will be understood from the foregoing description. It is very simple, does not get out of repair easily, and does not materially add to the complication or size of the bench. By means of it the buggy-boy is relieved of a good deal of work and a less number of boys will be required; but what is more essential the welder will not have to walk from two to ten feet for the tongs, as at present, and will not have to wait for the return of the hook or other connecting means to the front end of-the bench, so that the output of the furnace will be considerably increased and overheating of the plates avoided. My invention, as before stated, also has advantages, although in a lesser degree, for drawing long metal articles of any kind or description, whether cold or hot.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In metal-drawing apparatus, the combi nation with a die or hell, of drawing mechanism in line therewith, a tongs anda hook separate therefrom for attaching the blank to the drawing mechanism, and mechanism disconnected from the tongs and hook for returning the same to the front end of the drawing mech anism.

2. In metal-drawing apparatus, the combination with a die or bell, of a continuously-running draw-chain in line therewith, means for attaching the blank to the chain, and continuously-running mechanism actuated from the chain for returning the attaching means to the front endof the drawing apparatus.

3. In metal-drawing apparatus, the combination with a die or hell, of drawing mechanism in line therewith, means for attaching the blank to the drawing mechanism, a conveyer disconnected from the attaching means for returning the same to the front end of the drawing mechanism, and means for driving said conveyer always in one direction.

4:. In metal-drawing apparatus, the combination with a die or bell, of a draw-chain in line therewith, means for attaching the blank to the draw-chain, and a conveyer actuated from the draw-chain for returning the attaching means to the front end of the drawing mechanism.

5. In metal-drawing apparatus, the combination with a die or bell, of drawing mechanism in line therewith, means for attaching the blank to the drawing mechanism, a trough at the side of said drawing mechanism, and a positively-driven conveyer chain in said trough for returning the attaching means to the front end of the drawing mechanism.

6. In metal-drawing apparatus, the combination with a die or bell, of drawing mechanism in line therewith, means for attaching the blank to the drawing mechanism, a trough at the side of said drawing mechanism, said trough having an inclined front end, and a conveyer-chain running in said trough for returning the attaching means to the front end of the drawing mechanism.

7. In tube-making apparatus, the combination with a furnace, of a draw-bench in front of the same, its draw-chain, means for attaching the tube-blank to the draw-chain, aconveyer on said bench for returning the attaching means to the front end of said bench, and means for driving said conveyer always in one direction.

8. In tube-making apparatus, the combination with a furnace, of drawing mechanism in front of the same, means for attaching the tube-blank to the drawing mechanism, a conveyer on said drawing mechanism and actuated therefrom for returning the attaching means to the front end of the drawing mechanism.

9. In tube-making apparatus, the combination with a furnace, of a draw-bench in front of the same, a draw-chain therefor, sprocketwheels at the ends of the bench over which said draw-chain passes, a conveyer-chain on said bench, sprocket-wheels around which the same passes, and connections between one of the sprocket-wheels of the draw-chain and one of the sprocket-wheels of the conveyerchain.

10. In tube-making apparatus, the combination with a furnace, of a draw-bench in front of the same, drawing mechanism on said drawbench, means for attaching the tube-blank to the drawing mechanism, a conveyer-chain on said draw-bench, and a trough in which said conveyer-chain runs, said trough having an upwardly-inclined forward end to deliver the attaching means from the conveyer-chain.

11. In tube-making apparatus, the combination with a furnace, of a draw-bench in front of the same, its draw-chain, a conveyer-chain on said bench at the side of the draw-chain, a trough in which said conveyer-chain runs, said trough having a widened forward end, and an oblique guide projecting over the conveyer-chain at the forward end thereof to deliver the tongs or hook from said chain.

In testimony whereof I, the said JOHN J. BOAX, have hereunto set my hand.

JOHN J. BOAX.

Witnesses:

ROBERT C. ToT'rEN, RoBT. D. TOTTEN.