US3662579A - Method and apparatus for roll forming ends of helically corrugated pipe - Google Patents
Method and apparatus for roll forming ends of helically corrugated pipe Download PDFInfo
- Publication number
- US3662579A US3662579A US78892A US3662579DA US3662579A US 3662579 A US3662579 A US 3662579A US 78892 A US78892 A US 78892A US 3662579D A US3662579D A US 3662579DA US 3662579 A US3662579 A US 3662579A
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- US
- United States
- Prior art keywords
- pipe
- roll
- length
- unit
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/06—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers working inwardly
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
Definitions
- the trailing end of the pipe as it comes from a pipe forming machine or the like, is located axially in a predetermined relation to a forming apparatus, and the trailing end is formed while the length of pipe is backed up under pressure on the leading end and is supported intermediate its ends. Rotational force is applied to both ends of the pipe to avoid distortion. Thereafter, the leading end is formed while the length of pipe is backed up under pressure on the trailing end and is supported intermediate its ends; and again rotational force is applied to both ends of the pipe.
- the apparatus comprises two units in tandem, disposed parallel to the pipe axis, and the pipe is moved, transversely of its axis, successively to the two units.
- a forming section in a fixed position, and a back-up and thrust section and an intermediate pipe supporting section are movable in a 2:1 ratio to take care of difierent pipe lengths.
- a back-upand thrust section is in a fixed position, and a forming section and an intermediate pipe supporting section are arranged as above described, to take care of different lengths of pipe.
- each end of the pipe is formed separately.
- Two forming units are disposed in tandem parallel to the pipe axis and the pipe is moved transversely of its axis, first into one unit where one end of the pipe is roll formed and then into the second unit (which is in efi'ect reversed end for end from the first unit) and the other end of the pipe is roll formed in the second unit.
- means are provided to support the pipe being formed intermediate its ends and preferably centrally thereof and means are provided to drive the end of the pipe which is not being formed in the particular unit at the same speed as the other end of the pipe is being driven by the forming rolls to avoid twisting of the pipe.
- the end of the pipe not being formed in the particular unit is backed up under pressure axially of the pipe to prevent the axial shifting of the pipe during roll forming.
- the apparatus of the present invention may be set up adjacent the end of the pipe forming machine and as the pipe issues from the pipe forming machine and is cut to length in one of a number of ways, means are provided to stop the axial movement of the pipe with its trailing end short of a predetermined transverse line.
- the pipe is kicked off transversely of its axis in well known manner into a positioning unit where the trailing end of the pipe is brought accurately to said predetermined line. From the positioning unit, the pipe is again kicked off transversely of its length into the first unit in which the roll forming section is fixed in position with respect to the said predetermined line.
- an intermediate pipe supporting section and a back-up and thrust section are adjustably mounted to take care of different lengths of pipe; and the adjustment of these two sections is arranged such that the back-up and thrust section moves twice as far as the intermediate pipe supporting section, whereby the latter is always disposed centrally of the length of pipe regardless of its length.
- Means are provided at the back-up and thrust section to push the length of pipe axially into the forming rolls of the forming section and to apply a thrust axially of the pipe.
- the forming section has a pair of forming rolls which are power driven and means are provided to force one of said rolls into an engagement with the pipe against the other fonning roll. The initial deformation is made without rotating the pipe.
- Means are provided to eject the pipe from the roll forming section and to kick it over into the second unit in which the roll forming section (now movable) and the back-up and thrust section (now fixed) are reversed end for end; and in the second unit, the leading end of the length of pipe is roll found as described above.
- FIG. 1 is a fragmentary cross sectional view of the abutting ends of two pieces of helically corrugated pipe showing the configuration produced by the present invention.
- FIG. 2 is a diagrammatic phantom view of one of the units of the apparatus.
- FIG. 3 is a diagrammatic plan view of the arrangement of the apparatus.
- FIG. 4 is a diagrammatic sectional view taken on the line 44 of FIG. 3 on an enlarged scale.
- FIG. 5 is a fragmentary perspective view of the drive and locking means for the movable sections of the machine.
- FIG. 6 is a longitudinal cross sectional view through the roll forming section of one of the units.
- FIG. 7 is a longitudinal cross sectional view through the back-up and thrust section of one of the units.
- FIG. 8 is an elevational view of a central supporting section.
- FIG. 9 is a fragmentary cross sectional view taken on the line 9 -9 of FIG. 8.
- FIG. 10 is a fragmentary cross sectional view taken on the line l0-l0 of FIG. 8.
- FIG. 11 is a cross sectional view taken on the line I1--ll of FIG. 6.
- FIG. 12 is a elevational view as seen from the left of FIG. 6.
- FIG. 13 is a hydraulic diagram
- FIGS. 14A and 14B, taken together, are an electrical diagram.
- the general arrangement of the apparatus is best seen in FIG. 3.
- the line 10 in FIG. 3 indicates the path of travel of the axis of a piece of pipe coming off a pipe forming machine or other pretreatment apparatus assumed to be off the drawing to the right.
- the pipe comes of? such previous apparatus in the direction of the arrow on the line 10.
- the line 11 indicates a position line for the trailing end of the length of pipe.
- a positioning apparatus is generally indicated at 12 and a first unit of the machine is shown at 13 and a second unit at 14.
- the unit 13 comprises a roll forming section 15, a back-up and thrust section 16, and a central supporting section 17.
- the unit 14 includes the same sections but reversely positioned. Thus, in the unit 14 the roll forming section is at the other end of the unit and the back-up and thrust section 16a is at the end corresponding to the unit 15.
- the central supporting section is again at the center.
- the positioning unit comprises a number of V-shaped anns l8 pivoted at 19 and provided with means (not shown) for rotating the arms 18 counterclockwise as seen in FIG. 4 to roll the pipe from the positioning unit to the first forming unit.
- the pipe is indicated in broken lines at 20.
- a positioning cylinder is provided at 21 having a fixed stroke such that it pushes the length of pipe axially to a position where its trailing end is on the line 11.
- the arms 18 are actuated to roll the pipe transversely of its length into the first roll forming unit 13.
- the pipe is roll formed at its trailing end in the section 15 of the unit 13 and is then kicked over, as will also be described, into the unit 14.
- the leading end of the pipe is roll formed in the section 15a. The pipe is then kicked off transversely of its length for any further processing which may be required.
- the Roll Forming Section Reference will now be made to FIGS. 6, 11 and 12. From these Figures it will be seen that the upper forming roll 30 is mounted on a shaft 31 which is driven through gearing 32 by an electric motor or the like 33.
- the lower forming roll 34 is mounted between bearings 35 and 36 on a frame 37 which may be raised and lowered by hydraulic pressure applied to the cylinder 6.
- the drive for the lower roll 34 is obtained through gearing 39 from the upper forming roll shaft 31 to the shaft 40.
- the shaft 40 drives the lower forming roll 34 through a Schmidt coupling 44.
- the Schmidt coupling is a well known mechanism for transmitting rotational drive from a fixed shaft to a non-coaxial parallel shaft which must be subjected to movement transversely of its axis.
- the unit 16 comprises a lower roll 54 which is driven by means of an electric motor 55 on a fixed axis.
- the roll 54 is preferably covered with neoprene or rubber or rubber-like material for the purpose of enhancing friction.
- a cooperating upper roller 56 is an idler and it is advanced and retracted on its axis by the action of the cylinder 3 and its piston rod 3a. It should be noted that the roll 54 is driven at the same speed as the lower forming roll 34 so that the same torque is applied at both ends of the pipe to avoid twisting.
- the upper roll 56 does not in any sense deform the leading end of the pipe but simply serves to hold the pipe against the roll 54 so as to be driven thereby frictionally.
- the Central Supporting Section 17 comprises two pairs of arms in V configuration as indicated at 60 in the several Figures.
- the two sets of arms 60 are rigidly secured together by means of a connector member 61 which may be a piece of welded steel pipe to which the arms 60 are welded.
- the arms 60 are provided with rollers 62a to support smaller diameter pipe such as indicated in phantom lines at 42a and rollers 62 to support large diameter pipe such as indicated in phantom lines 42.
- the section 17 is also mounted on wheels 63 riding on rails 64 which may of course be the same rails or a continuation of the rails 51 previously described.
- a rack 65 is provided which again may be a continuation of the rack 52 heretofore described, and as seen in FIG. 10 a pinion 66 driven through gearing 67 by a motor 68 is provided.
- each of the sections 16 and 17 may be adjusted axially of the pipe to take care of different lengths of pipe.
- Each of the sections 16 and 17 has its own motor to drive a pinion in engagement with a rack which may of course be a continuous rack.
- the drives are so arranged that the section 17 moves half the distance movedby the section 16 for each revolution of the respective pinions, whereby the section 17 will always be centrally disposed between the sections and 16. This may be accomplished by a 2:1 ratio in the respective gear drives, or by having one motor designed to run twice as fast as the other.
- the same situation prevails in the unit 14 except in the unit 14 it is the roll forming section 15a which is movable rather than the back-up and thrust section 16a.
- the sections are locked in position, as seen in FIG. 5, by means of a locking element 69 which is simply a mating piece of rack which is actuated by a piston of cylinder 70 to lock the adjustable sections of the unit in adjusted position.
- a locking element 69 which is simply a mating piece of rack which is actuated by a piston of cylinder 70 to lock the adjustable sections of the unit in adjusted position.
- Means are provided to rock the arms 60 and these comprise an arm welded or otherwise, rigidly secured to the member 61 and acted upon by the pistons of the two cylinders l and 2.
- These cylinders are shown in more detail in FIG. 9. It will be seen that the pistons of both cylinders are connected to the lower end of the member 80 so that it may be moved either to the right or to the left of FIG. 9.
- the piston rod la of the cylinder 1 is moved when pressure is supplied to the cylinder 1 against a stop 81.
- the piston rod 2a of the cylinder 2 is not limited in its stroke. As will be described in more detail hereinafter, fluid at higher pressure is applied to the cylinder 1 than to the cylinder 2. Operation of a Unit Reference is now made to FIG.
- FIG. 2 which, as indicated, is a phantom view of the unit 13 and which shows a number of hydraulic cylinders and a number of limit switches in various positions.
- the interrelationship of the various cylinders in the hydraulic circuit will be understood with reference to FIG. 13 and the interaction of the limit switches by reference to FIG. 14.
- the general sequence of operations will be best understood by reference to FIG. 2. Let it be assumed that the piston of cylinder 1 is extended against its stop and the piston rod of cylinder 2 is retracted whereby the arms 60 are tilted toward the viewer as seen in FIG. 2. The piston rod of cylinder 3 is retracted, moving the upper roll 56 back out of the way to permit entry of a piece of pipe. The piston rod of cylinder 4 is also retracted thus raising the roll 56.
- the piston rods of the cylinders 5 are retracted, the piston rod of cylinder 6 is retracted, and the piston rods of cylinders 7 are retracted.
- the unit is now in a position to receive a length of pipe to be operated upon. As a piece of pipe rolls from the positioning unit 12 into the unit 13, it contacts the limit switch A. This causes hydraulic fluid to be applied to the cylinder 2 to extend its piston rod and, through the lever 80, to rotate the arms 60 to their erect position shown in FIG, 2. Since the piston of cylinder 1, which is the higher pressure cylinder, is extended against the stop 81, the piston rod of cylinder 2 moves until it abuts or is stopped by the rod of piston 1.
- the limit switch B (or if desired, a time delay in association with limit switch A) actuates the cylinder 3 to push the roll 56 and its associated parts to the right.
- the roll 56 has a flange 56a which bears against the leading end of the length of pipe and thus the cylinder 3 serves to push the length of pipe axially toward the right, as seen in FIG. 2, into the bite of the forming rolls 30 and 34.
- the cylinder 3 is arranged to provide a rapid advance at approximately 1,500 psi for about 10 inches and thereafter a slow advance for approximately 3 inches. Cylinder 4 is then actuated by the limit switch C and its piston rod extends and causes the upper roll 56 to move downward to contact the inside of the pipe.
- the piston of the cylinder 4 is retracted to open or raise the upper back-up roll 56.
- the cylinders 5 retract their pistons to retract the wedges 5a.
- the cylinder 6 retracts the lower forming roll 34 and the cylinder 3 retracts the back-up roll 56 at rapid traverse.
- the lower forming roll contacts limit switch F which causes the cylinders 7 to be actuated to push the pipe to the left out of the section and these cylinders then retract upon contacting the limit switch G.
- the limit switch F on the back-up unit is in series with the limit switch F to assure that the rolls are clear of the pipe.
- Limit switch F also causes actuation of the cylinder 1 to retract its piston and permit cylinder 2 to cause its piston to complete its stroke which rocks the assembly of the arm 60 away from the viewer as seen in FIG. 2 to roll the pipe out of the unit. As the pipe rolls clear of the arms 60, it contacts the limit switch H and cylinder 2 then retracts, and cylinder 1 extends to the position originally described and the cycle is complete.
- unit 13 The description of the operation of unit 13 is the same as with unit 14 except that the position of the forming section (now movable) and the back-up section (not fixed) are reversed.
- the operation of the unit 14 need therefore not be described in detail except to say that the unit 14 forms the desired corrugations on the leading end of the length of pipe.
- FIG. 1 shows in enlarged cross section the abutting ends of two pieces of helically corrugated pipe 90 and 91.
- the helical corrugations of the length 90 are shown at 92 and typically there may be formed two annular corrugations 93 and an annular inwardly directed flange 94.
- Two adjacent ends of pipe formed as above described may be connected together by hugger band 95 with gaskets 96 as taught in the above mentioned Boynton patent.
- FIG. 13 shows the several cylinders which have been described, numbered with the same reference numerals used in FIG. 2.
- the hydraulic system employs an electric motor 100 to drive two pumps 101 and 102.
- FIG. 3 conventional hydraulic symbols have been used and it is believed that the operation of the hydraulic circuit need not be described in detail but will be clear to one skilled in the art.
- FIG. 14 the several limit switches are shown and are designated with the same numerals as those used in FIG. 2 and again it is believed that the electrical system does not require detailed explanation.
- Apparatus for annularly roll forming the ends of a length of helically corrugated pipe comprising a. two units disposed in tandem, each unit comprising a roll forming section, a back-up and thrust section, and an intermediate pipe supporting section,
- b. means to position a length of pipe to be formed with one of its ends on a predetermined line transversely of the pipe axis
- Apparatus according to claim 1 wherein said means to position one end of said length of pipe on a predetermined line is arranged to so position the trailing end of said length, in terms of its axial movement from another processing apparatus.
- Apparatus according to claim 1 wherein the back-up and thrust section of said first unit and the roll forming section of said second unit are adjustable parallel to the pipe axis, to take care of different lengths of pipe to be formed.
- each of said units is provided with an axially oriented rack
- each of said pipe supporting sections and the back-up and thrust section of the first unit and the roll forming section of the second unit are provided with a pinion engaging the respective rack, and a power means to rotate said pinion, the power means for said pipe supporting section being arranged to operate at half the rotational speed of the other sections, to drive said pipe supporting sections half the distance, per unit of time, of the other sections.
- each of said units is provided with an axially oriented rack
- each of said pipe supporting sections and the back-up and thrust section of the first unit and the roll forming section of the second unit are provided with a pinion engaging the respective rack, and a power means to rotate said pinion, the pinions for said pipe supporting sections having half the circumference of the others, to drive said pipe supporting sections half the distance of the other sections per revolution of the respective pinions.
- each of said roll forming sections comprises upper and lower cooperating forming rolls, means for driving the upper roll on a fixed axis, and means for driving the lower roll and means for moving said lower roll toward and away from said upper roll, means initially to press said lower roll against the pipe and the upper roll without rotation, and means operative upon completion of the initial local deformation, to cause said cooperationg rolls to rotate, to perform said annular roll forming operation.
- Apparatus according to claim 8 wherein the said roll forming sections are provided with an end thrust bearing for the end of the pipe being formed, and means are provided to move said end thrust bearing axially of the pipe to compensate for the reduction in length resulting from the roll forming operation, and, upon completion of the forming operation, to push the pipe axially clear of the forming rolls.
- the back-up and thrust sections comprise a lower roll driven at the same speed as the lower forming roll of the respective unit, and an upper roll to hold the pipe against said lower driven roll, said upper roll having a flange to bear against the pipe end and having means to exert thrust against said pipe end.
- intermediate pipe supporting sections each comprise at least one pair of arms rigidly connected together in V" relation, means to tilt said arms in one direction to permit entry of a length of pipe, means to fix said arms rigidly in upright position to support said pipe, and means to tilt said arms in the other direction to permit said length of pipe to issue from said intermediate pipe supporting section.
- Apparatus according to claim 14 wherein there are two pairs of said arms, said pairs being rigidly connected together and spaced apart axially of the pipe.
Abstract
Description
Claims (16)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7889270A | 1970-10-07 | 1970-10-07 |
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US3662579A true US3662579A (en) | 1972-05-16 |
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US78892A Expired - Lifetime US3662579A (en) | 1970-10-07 | 1970-10-07 | Method and apparatus for roll forming ends of helically corrugated pipe |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4008592A (en) * | 1975-07-23 | 1977-02-22 | W. E. Hall Company | Method and apparatus for flanging a length of spirally wound corrugated pipe |
US4018072A (en) * | 1975-10-22 | 1977-04-19 | Pacific Roller Die Co., Inc. | End recorrugator |
US4711110A (en) * | 1986-10-24 | 1987-12-08 | Spiro America Inc. | Apparatus for crimping pipe |
US5020351A (en) * | 1990-05-24 | 1991-06-04 | Spiro America Inc. | Apparatus for flattening irregular circumferential surfaces in spirally formed pipe |
US6209893B1 (en) * | 1999-06-28 | 2001-04-03 | Wakyn Steven Ferris | Mobile support device for concrete spreading hoses |
US6405919B2 (en) * | 2000-01-28 | 2002-06-18 | Nexans | Process for the continuous production of longitudinally seam-welded and corrugated metal tubes |
US6994381B1 (en) | 2000-07-20 | 2006-02-07 | Contech Construction Products Inc. | Stab joint coupling |
US20090012138A1 (en) * | 2007-07-03 | 2009-01-08 | Guido Galley | 4-imidazolines |
CN106001223A (en) * | 2016-07-18 | 2016-10-12 | 江西通达实业有限公司 | Pipe flange edge rolling device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US74572A (en) * | 1868-02-18 | Improvement in machine foe corrugating sheet metal | ||
US2312225A (en) * | 1940-05-20 | 1943-02-23 | Fram Corp | Machine for treating the edges of casings |
US3548623A (en) * | 1968-07-26 | 1970-12-22 | Grotnes Machine Works Inc | Method and apparatus for forming circumferential grooves and radial flange in metal pipe ends |
-
1970
- 1970-10-07 US US78892A patent/US3662579A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US74572A (en) * | 1868-02-18 | Improvement in machine foe corrugating sheet metal | ||
US2312225A (en) * | 1940-05-20 | 1943-02-23 | Fram Corp | Machine for treating the edges of casings |
US3548623A (en) * | 1968-07-26 | 1970-12-22 | Grotnes Machine Works Inc | Method and apparatus for forming circumferential grooves and radial flange in metal pipe ends |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4008592A (en) * | 1975-07-23 | 1977-02-22 | W. E. Hall Company | Method and apparatus for flanging a length of spirally wound corrugated pipe |
US4018072A (en) * | 1975-10-22 | 1977-04-19 | Pacific Roller Die Co., Inc. | End recorrugator |
US4711110A (en) * | 1986-10-24 | 1987-12-08 | Spiro America Inc. | Apparatus for crimping pipe |
US5020351A (en) * | 1990-05-24 | 1991-06-04 | Spiro America Inc. | Apparatus for flattening irregular circumferential surfaces in spirally formed pipe |
US6209893B1 (en) * | 1999-06-28 | 2001-04-03 | Wakyn Steven Ferris | Mobile support device for concrete spreading hoses |
US6405919B2 (en) * | 2000-01-28 | 2002-06-18 | Nexans | Process for the continuous production of longitudinally seam-welded and corrugated metal tubes |
US6994381B1 (en) | 2000-07-20 | 2006-02-07 | Contech Construction Products Inc. | Stab joint coupling |
US20090012138A1 (en) * | 2007-07-03 | 2009-01-08 | Guido Galley | 4-imidazolines |
CN106001223A (en) * | 2016-07-18 | 2016-10-12 | 江西通达实业有限公司 | Pipe flange edge rolling device |
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Legal Events
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---|---|---|---|
AS | Assignment |
Owner name: MELLON BANK (EAST), NATIONAL ASSOCIATION,STATELESS Free format text: SECURITY INTEREST;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH. CORP.;REEL/FRAME:004600/0031 Effective date: 19860721 Owner name: CONTECH CONSTRUCTION PRODUCTS INC., A OHIO CORP.,O Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ARMCO INC.;REEL/FRAME:004599/0955 Effective date: 19860722 Owner name: MELLON BANK (EAST), NATIONAL ASSOCIATION Free format text: SECURITY INTEREST;ASSIGNOR:CONTECH CONSTRUCTION PRODUCTS INC., AN OH. CORP.;REEL/FRAME:004600/0031 Effective date: 19860721 Owner name: CONTECH CONSTRUCTION PRODUCTS INC., 1001 GROVE STR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ARMCO INC.;REEL/FRAME:004599/0955 Effective date: 19860722 |