US928073A - Method of coiling pipe. - Google Patents

Description

L. G. SCHNEIDER.

METHOD OF COILING PIPE.

1 APPLICATION FILED AUG. 21, 1908.

Patented July 13, 1909.

2 SHEETS-SHBET 1.,

Svwentoz EEEEEE 12E Q) in eooao L. G. SCHNEIDER.

METHOD OF GOILING PIPE.

APPLICATION FILED AUG, 21, 1908.

Patented July 13, 1909.

2 SHEETS-SHEET 2 UNITED STATES PATENT ounce. LEOPOLD C. SCHNEIDER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PHILADELPHIA PIPE BENDING COMPANY, A CORPORATION OF NEW JERSEY.

METHOD OF COILING PIPE.

Specification of Letters Patent.-

Patented July 13, 1909.

Application filed August 21, 1908. Serial No. 449,626.

To all whom it may concern:

Be it known that I, LEOPOLD C. SCHNEIDER, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented new and useful Im rovements in Methods of Coiling Pipe, 0 which the following is a specificatlon.

My invention relates to improvements in a method for coiling or bending pipes or rods, composed of metal such as wrought iron or ot er materials, and particularly to cold bending or coiling.

Pipes, rods or other articles of wrought iron or other material are ununiform, as bou ht in the open market, in hardness,

, thic ness, or in other regards, and in coiling them in the old wayand by the old appa ratus, uniformity of bending, coiling, etc. is not attained because of this lack of uniformity in the stock material.

It is the object of my invention to produce bends or coils uniform in curvature or shape e irrespective of this lack of uniformity in t material to be bent or coiled.

I have found that by operating upon the pipes or rods in such manner as to cause them to tend to forma coil of a diameter less than the desired finlshed diameter, and then in the same operation continuously operating upon them in opposite direction to causethem to form a coil of desired diameter, the coil of desired diameter when so formed is perfectly. uniform irrespective of the lack of uniformity in the stock material.

My invention resides, therefore, in the method which consists in overbending the rods or pipes and then bending them back to the desired shape or curvature.

My invention resides also in other features heremafter described and claimed. For an explanation of my method and for an illustration of one of the forms my apparatus may take for carrying out my method,

reference is to be had to the accompanying drawings in which:

\ Fi re 1. is a fragmentaryplan view of a bendlng or coiling machine. Fig. 2 is a lan view of my improved coihng or ben ing machine showin irther attachments. Fig. 3 is a view part yin elevation, partly'in section, showing the means for adjusting and holding the auxiliary back bending means. tion, partly in section, of the back bending means.

Referring to the drawings: A base plate 1, of iron or other suitable material, has mountcd thereona vertical spindle 2 driven by an electric motor, belt or other suitable source of power. gear 3 which meshes with and drives the gear 4 mounted upon the spindle 5. Carried by the spindles 2 and '5 respectively are the rollers 6' and 7 having concave rims to receivethe pipe, rod, or other stock, as well understood in the art. The gear 4 and roller 7, mounted upon the spindle 5, are adjustable toward and away from the gear 3 and roller 6 by the screw 8 operating in the bracket 9, and square-headed at 10 to receive a wrench or the like. Upon the spindle 11 1s mounted Flg. 4 is a vertical eleva- Secured to this spindle 2 is the a roller 12, also of concave rim and slidable mounted upon the spindle 17 and adjustable and outwardly by the screw 18 inwardly bracket 19 and square-headed operating in at 20.

The brackets 21 and 22, bolted to the base plate 1, are alined with each other and support" and secure the bar 23 whichmay be of square or other suitablecross section. Movable along the bar 23 is the clamp 24 which may be clamped securely to the bar 23 at any desirableposition. Asseen in F1 g. 3, the cl amp 24 embraces the bar 23 and may be clamped snugly thereto by tightening the bolt 25 The top of the clamp 24 is recessed to-recelve the cylindrical pin or pivot 26 secured to or mtegral with the clamp 27 whlch embraces the bar 28 which may be snugly clamped thereto by the bolts .29. The pivot 26 has an annular groove 30 in which may engage the end of the screw 31 threaded in the bracket 24;, thus reventing the clam 27 from lifting out 0 or away from the 0 amp 24. By tms pivotal. connection between the clamps they may each be adjusted to different positlons with respect to their respgctlve bars 23 and 28 and the bar 28 may ad usted to d1fformity ferent angular positions with respect to the bar 23.

Upon the bar 28 is mounted the roller 32, having a concave rim, and mounted upon the spindle 33 carried by the rod 28. Beyond the roller 32 is a similar roller34, mounted upon a spindle or pin 35 carried by the block 36 which is slidable inwardly and outwardly on the bar 28 by means of the screw 39 provided with the hand crank 38, as seen in detail in Fig. 4.

In the base late 1 are provided a plurality of holes as 39, in which may be placed a pin or pins to prevent the rod 28 from rotating about the pivot 26 during operation.

The operation is as follows: The pipe, rod or other stock 40 is fed in from the left,as viewed in Fig. 1, between the rollers 6 and 7, and lies against the roller 12. Due to friction and the power delivered through the spindle 2, the stock 40 is drawn toward the right and engages in the concave periphery of the roller 16. This roller is set in, by screw 18, a sufiicient distance to cause the pipe to coil or bend, as well understood in the art. This preliminary coiling or bending is, in effect, local overbending or coiling, as indicated at L. Assuming that it is desired to produce a bend or coil'of a diameter of say three feet, the roller 16 is set in far enough to overbend or overcoil the stock so as to tend to form a bend or coil of a diameter of less than three feet. The pipe or stock 40 is, however, guided between the rollers 32 and 34 which are set out far enough to determine a coil or bend of three feet diameter, the operation being a local bending back again after leaving roller 16 from the lesser diameter to the greater or finish diameter of three feet. This back bending or back coiling is accomplished locally in the region indicated by L By this overbending and bending back again, the bend or coil will take the desired finishdiameter and the diameter will be uniform, whereas, by merely setting the roller 16 in to a point to produce a three foot bend or coil, the finished bend or coil will not be uniformly of three feet diameter but will vary considerably due to the lack of uniin the properties and qualities of the stock.

It will be noted that by my method or process the overbending or overcoiling and the bending back or coiling back is accomplished within less than a complete turn or coil and,

' indeed, within a small fraction of a complete bend or coil, as the preferred method. Thus, the overbending or overcoiling is accomplished at roller 16 and immediately thereafter, within a fraction of a complete turn of the coil, at rollers 32 and 34, the

bending back or coiling back is accomplished.

The bars 23 and 28 may have suitable g'raduations, such as 41 and 42, by which the position of the rolls 32 and 34 with respect to the other rolls may be accurately de-' termined. Thus the distance of the center of the pin 26 from the axis of the stock 40 as it passes between the rolls 6 and 7 may be made the same or different from the distance between the center of the pin 26 and'the axis of the stock 40 as it passes between the rolls 32 and From the foregoing description of the operation o my apparatus, my process is also understood. My in'iprovenient resides in overbending or overcoiling the stock and then bending it out again to the desired finish diameter, and as explained by this process a practically uniform bend or coil can be produced notwithstanding the lack of uniformity in the properties or qualities ot the stock at various points throughout its length. I have found that by this method and apparatus, the capacity of the machine is .very greatly increased, so that while a uniform bend or coil is produced it is made at far less cost-than heretofore.

Vhile I have shown two rollers 32 and 34 for the bending back operation, it is to be understood that the roller 34 may be omitted, though the presence of the second roller 34 is preferable.

In Fig. 2 the parts illustrated are the same as in Fig. 1 except.- that upon the base plate 1 there may be provided a single roll idler 43 or the double roll idler 44 having the two rolls 45 and 46, the latter adjustable by a screw 37 and hand crank 38. It is to be understood also that the idlers, Whether single or double roll, may be multiplied in number.

While the advantages of my process and apparatus 'are available to the bending of stock in heated condition, it is particularly adaptable to the cold bending or coiling of pipes, rods and other stock.

What I claim is:

1. As an improvement in the art of coiling pipe while cold, the method which consists iii-continuously locally operating upon the pipe to cause the same to tend to take a diameter less than the desired finish diameter, and then continuously locally operating diameter other than finish diameter, and T then, before a complete coil convolution or turn is formed, continuously bending the pipe or rod to a different curvature to form a coil of desired diameter.

3. As an improvement in the art of cold coil of uniform curvature.

coiling pipe, the method which consistsin 4. Asan improvement in the art of coiling pipe while cold, the method which consists in continuously coiling the pipe to acurvature sharper than the finish. curvature, andthen, before the completion-of a convolution "or turn of the coil, continuously bending the pipe in opposite direction to cause the same to take desired'uniform curvature.

5. As an improvement in the art of coiling rod or pipe While cold, the method which consists in continuously overbending the pipe or rod tocause the same to tend to form a coil, and then, before the completion of a convolution or turn of the coil, continuously bendin the pipe or rod back again to form an uniform coil of desired curvature.

6. As an improvement in the art of coiling pipe or rod while cold, the method which consists in continuously feeding the pipe or rod and continuously overbending thesame, tending to form a'coil of less diameter than the desired finish diameter, and then, before the completion of a convolution or turn'of the coil, continuously bending the pipe or rod in opposite direction to desired finish diameter while continuously fed to .form an uniform coil.

7. As an improvement in the art of coiling pipe or rod While cold, the method which consists in continuously feeding the pipe or rod and continuously overbending the same tending to form a coil of a diameter less than the desired finish diameter, and then, .during said continuous feeding and before a convolution isformed, continuously bending said pipe or rod in opposite direction to form an uniform coil.

8. As an improvement in the-art of coiling pipe or rod While cold,the method which consists in continuously feeding the rod or pipe and continuously roller bending the same to a curvature sharper than the desired finish curvature, and then, while continuously fed, roller bending said pipe or rod back in opposite direction to form an uniform coil.

9. As an improvement in the art of coiling pipe or rod while cold, the method which consists in continuously feeding the pipe or rod and continuously roller bending the same tending to form a coil of a diameter less than the desired finish diameter, and then, before the completion of a convolution or turn of the coil roller bending the pipe or rod in opposite'direction to desired finish curvature to form an uniform coil.

10. As an improvement in the art of coiling pipe, the method which consists in continuously locally bending the pipe so that it tends to take a curvature sharper than the desired finish curvature, and then, before the completion of a convolution or turn. of the coil, continuously locally bending the pipe in opposite direction to form an uniform coil of or turn of the coil, continuously locally bending the pipe or rod in opposite direction to form a coil of desired curvature.

12. As an improvement in the art of coiling pipe While cold, the method which consists in continuously feeding the pipe, continuously operating locally upon said pipe while continuously fed to cause the same to tend to take a curvature other than desired curvaturefand then, While simultaneously continuously fed, continuously operating 10- cally upon the pipe to-cause the same to take another curvature to form an uniform coil.

13. As an improvement in the art-of coiling pipe while cold, the method which consists in continuously feeding the pipe con-'- tinuously operating upon the pipe by roller bending actionto cause the/pipe to tend to form a coil of other than desired diameter,

and then, while simultaneously continuously fed, continuously operating upon the pipe by roller bending action to cause the pipe to form a coil of desired and uniform diameter.

14. As an improvement inthe art of coiling pipe While cold, the method which consists in continuously feeding the pipe,.continuously operating upon thepipe to cause the same to tend to form a coil of less than desired diameter, and then, while continuously fed, operating upon the pipe in opposite direction to cause the same to form a coil of desired and uniform diameter, both said operations upon the pipe occurring within a relatively short length thereof.

In testimony whereof I have hereunto afiixed my signature in the presence of the two subscribing witnesses.

LEOPOLD C. SCHNEIDER.

In the presence of I T. G, PHINNY, G. M. HARDEN.

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