EP0397656A1 - Process and device for manufacturing tubes with helically arranged seams. - Google Patents
Process and device for manufacturing tubes with helically arranged seams.Info
- Publication number
- EP0397656A1 EP0397656A1 EP88909735A EP88909735A EP0397656A1 EP 0397656 A1 EP0397656 A1 EP 0397656A1 EP 88909735 A EP88909735 A EP 88909735A EP 88909735 A EP88909735 A EP 88909735A EP 0397656 A1 EP0397656 A1 EP 0397656A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- marking
- markings
- pipe
- test
- tube
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/126—Supply, or operations combined with supply, of strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/12—Making tubes or metal hoses with helically arranged seams
- B21C37/128—Control or regulating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
- B21C51/005—Marking devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49764—Method of mechanical manufacture with testing or indicating
- Y10T29/49769—Using optical instrument [excludes mere human eyeballing]
Definitions
- the invention relates to a method for producing a screw seam tube from a material strip, which is fed and wound at an angle to the tube, wherein a deviation from the setpoint value of the circumferential length of the winding in each case occurring within a material and machine-related tolerance range is a correction measure ⁇ initiation.
- one longitudinal edge can be provided with a folded web and the other with a U-shaped fold, which are guided into one another, with the connecting rollers folding and pressing the fold.
- supporting rollers are provided in the interior of the resulting winding, which contain pressure load cells.
- a reduction in the circumference increases the pressure acting on the rollers and an increase in the circumference reduces the pressure.
- the measured pressure values are compared with a desired value corresponding to the desired circumferential length and the pressure of the bending rollers is changed.
- the object of the invention is now to create a method of the type mentioned at the outset which enables the production of screw seam tubes with any cross-sectional shape.
- the flat strip of material is derived from depending on enlarged distances, it is provided with markings that indicate circumferential lengths corresponding to the circumferential setpoint in at least one axially parallel alignment line of the markings on the pipe being formed, each deviation of a marking from the alignment line being used for the initiation of a corrective measure.
- the circumferential constancy of the desired cross-sectional shape is ensured by checking the circumferential length of the winding that is being created or parts thereof, the sum of which results in a circumferential length.
- the markings applied to the flat strip lie on the coiled tube in an axially parallel track. If shorter distances are selected, there are 5 axially parallel tracks, so that the alignment line can be checked several times within a circumferential length.
- the repeated checking of the escape within a circumferential length has the advantage that deviations are recognized more quickly and corrective measures will have a more immediate effect.
- the method according to the invention is suitable both for cylindrical tubes and for square tubes.
- the distances between the markings 5 can also be adapted to the side lengths by dividing the circumferential length into the corresponding side length, so that their constancy can also be monitored individually.
- the corrective measures can be of any type, for example to change the bending roll pressure, to change the angle between the strip inlet plane and the tube axis, or to pivot the strip inlet in the
- Each corrective measure can start from a zero or middle position corresponding to the setpoint value, so that one Changing the circumferential length must result in either a positive or a negative corrective measure. This can complicate or complicate the constructive design and / or the control of the correction means. For example, a rotation of actuators would require their right and left drive.
- a preferred embodiment of the method therefore provides that the tube is wound with a circumferential length that differs from the target value by the tolerance amount, so that markings only deviate from the escape line on one side, the deviations exclusively introducing corrective measures which act in the same direction.
- the tube is wound either too large or too small, which depends primarily on the type of screw seam. Welded screw seams will tend to enlarge their circumference due to the heating, and in the case of folded screw seams, the change in circumference depends on the formation of the fold; Both reductions and enlargements are known here.
- the set o setpoint of the circumferential length corresponds to one of the two limit values of the tolerance range, a tube with constant circumference is created with the maximum deviation that does not require any correction.
- the correction means can therefore be arranged in a basic position for the case of the maximum deviation, since a negative adjustment does not occur. If there is no deviation, corrective measures are carried out, and if there is a deviation in the direction of the other limit value, the corrective measures are carried out more intensely. For the above-mentioned rotation of an actuator is therefore only a simple one
- At least two test points can be provided along an axis-parallel line, which emit marking detection signals. If the circumference is constant, the signals occur simultaneously on. However, if there is a time difference between the signals, there is a change in scope. A check of the alignment of the markings carried out in this way is independent of the length of the circumference, but requires sensitive test instruments in order to detect the very small time differences.
- the corrective measures can only be carried out in the interval between the marking signals, so that their duration corresponds to the time difference and thus directly to the change in scope. In the case of corrective measures that change the contact pressure of bending or fold forming rolls or their position, a correction period that is only in the interval is not sufficient to achieve the desired success. If only one of the two marking detection signals is present, the corrective action is therefore initiated and preferably retained until the next marking detection signals are emitted. If these are then submitted at the same time, the corrective action is canceled. If, on the other hand, there is still an interval, the corrective measure is maintained or reinforced.
- Another possibility for executing the method consists in correcting a deviation from a predefined target value of the time difference between two marking detection signals from a single test center. 5
- Marking detection signals can be generated, for example, by changes in the reflection of light waves hitting the marking.
- each mark detection signal is generated by scanning a changed surface condition. The latter can be applied in particular to embossed markings.
- a device which has a guide table for the incoming material strip with a winding device comprising a pipe guide and, in particular, bending rollers, a testing device for detecting changes in the circumferential length and means associated with the testing device to initiate corrective measures.
- the method according to the invention can be carried out with such a device if the guide table has a marking device and a device for variably adjusting the distance between the markings, and at least one test device is provided in the area of the pipe guide of the winding device for emitting marking detection signals.
- a sensor which is adjustable along the material strip is preferably provided and, when a marking is recognized, causes the next marking to be formed by the marking device.
- the test device comprises at least two test points arranged in the region of the pipe guide in an axially parallel alignment line for emitting marking detection signals. Their arrangement depends on the available space, it is possible 5 inside or outside the pipe at any circumferential position.
- 1 to 3 show three angular processes in the manufacture of pipes with a round cross-sectional area
- 4 shows a schematic oblique view of a winding device for the production of tubes with an essentially rectangular cross-sectional area
- FIG. 6 is a plan view of the device of FIG. 5,
- Fig.lo in section along the line X-X of Fig. 5 or 6, the basic position of two roles for implementing corrective measures, 5 Fig.11 and 12 representations according to Fig.lo in changed positions of the two roles, and
- FIGS. 10 to 12 shows a basic circuit diagram of the control of the servomotor shown in FIGS. 10 to 12.
- the markings 4 are therefore according to FIG. 2 lying along an alignment line 6 which runs parallel to the tube axis 5. If the circumference of the tube 1 is constantly larger or smaller, the alignment line 6 'no longer runs parallel (FIGS. 1 and 3); If the change in circumference changes, there is no alignment line 6 r 6 '.
- FIG. 4 For the production of a tube 1 with an essentially rectangular cross section.
- a material band 3 advanced with the aid of the feed and, if appropriate, fold forming device 19 shown in FIGS. 5 and 6 is fed to a winding device 10, of which only an inner bending core is shown.
- a test device 8 is arranged below the material strip 3 or the pipe 1, the two test points 9, 9 'in a parallel 5 to the axis 5 of the Pipe extending escape line 6. If a test device 8 cannot be provided at this point for structural reasons, then, as shown in FIG.
- the test device 8 can also be provided laterally outside of the pipe 1 at any other point.
- a marking device 7, which generates markings 4 from the underside of the material strip 3, is provided at a distance in front of the first test point 9 that at least corresponds to the circumference.
- the marking device 7 can, for example, contain a punch or embossing stamp, an ink jet nozzle or the like 5, and is used in each case when a marking 4 already produced passes a sensor of a distance setting device 11 adjustable along the material strip 3 or the first test point 9, so that the distance a between the markings 4 corresponds to a circumferential length or a part of the circumferential length according to the above formula.
- Each marking 4 passing the first test point 9 travels around the circumference during the winding of the tube 1 and finally passes a second test point 9 'of the same test device 8.
- the marking signals of both test points 9, 9' then occur simultaneously. if the circumferential length of the last winding 2 corresponds to the circumference of the pipe. If, on the other hand, the pipe 1 becomes larger, the first test point 9 recognizes the signal earlier than the second test point 9 ', while the pipe 1 becomes smaller, 5 the first test point 9 detects a signal later than the second.
- the test device 8 can, for example, emit a light beam at each test point 9, 9 ', which, if the marking 4 is formed by a hole, is not reflected when passing through the hole, or, if the marking 4 forms a color spot, weaker reflections is tiert. If the marking 4 is embossed, a change in reflection can also be recognized here, but there is also the possibility here of scanning the surface of the material strip 3 and feeling the embossing.
- the material strip 3 drawn off a reel passes through a feed and fold-forming device 19, in which the metal strip 3 receives the edge formation shown in FIGS. 7 and 8.
- the material strip 3 runs between guide plates 15 of a guide piece 18.
- a guide track 12 extends parallel to the guide plates 15 and the marking device 7 is provided thereon. According to FIG. 7, this has an embossing stamp 16 which engages on the underside of the material strip 3 and is actuated by an electromagnet 17 via a lever transmission.
- the distance adjusting device 11 is arranged, which has a sensor for detecting the markings 4 (FIG. 8).
- the distance a between the marking device 7 and the distance setting direction 11 can be changed and is calculated from the circumferential length u in accordance with the formula given above.
- a pair of rollers 2o is arranged between the distance adjusting device 11 and the winding device 10 as a means 13 for correcting deviations of the calculated circumferential length u.
- the two rollers 2o are rotatably mounted on a holder and cover the longitudinal edge region bent in the fold forming device 19, next to which the markings 4 are embossed, and the one in the closed position Fold according to Figure 9 inner fold strips 26 comprises.
- the longitudinal edge area is therefore first offset by dimension B and the subsequent fold strip is folded down.
- the upper roller 2o is mounted in a carrier 21 which is arranged on a threaded spindle driven by a servomotor 22 mounted on the holder, so that the dimension B between the rollers 2o can be changed via the servomotor 22.
- the material strip entering the winding device 10 is formed there by the bending and folding closing rollers 14, and is folded, as can be seen from FIG. 9.
- electronics 25 provided with a freely programmable control 5 24 processes the signals emitted by the test stations 9, 9 ′ and controls the servomotor 22, which changes the distance B between the rollers 2o according to FIGS. 1o to 12, 10 a tube with the smallest diameter and in the position according to FIG. 12 a tube with the largest diameter is formed, since the distance of the edge area carrying the folded strip 26 to the axis 5 of the non-centrally guided tube is changed.
- a pipe 1 folded according to FIG. 9 tends to enlarge its diameter, so that a shape exaggerated in FIG. 1 would result.
- the tube 1 is now wound with a circumferential length reduced by the desired value by the tolerance amount, the markings 4 deviate only on one side from an axially parallel alignment line, in which they lie only with maximum automatic enlargement.
- dimension B is set to a maximum (Fig. 1o). If the test station 9, 9 'detects that the magnification is too small due to a deviation, the control motor 22 and the electronics 25 5 set the servomotor 22 in motion, which reduces the dimension B, the reduction corresponding to the time ⁇ difference between the mark detection signals increases.
- a slight time difference will, for example, bring about a slight reduction in dimension B, as shown in FIG. 11, while a maximum time difference will result in the edge strip according to FIG. 12 being completely pushed through.
- the attempt to enlarge the tube 1, which is set too small is always supported to the extent that leads to the desired extent due to time differences in the marking detection signals.
- test center 9 which then carries out a comparison between a predefined setpoint value of the time difference between two marking detection signals and their actual value, which is dependent on the circumferential length and the feed speed.
- This method can also be used at several test points 9, 9 ', or can also be superimposed on the method described above.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Formation And Processing Of Food Products (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT324587 | 1987-12-10 | ||
AT3245/87 | 1987-12-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0397656A1 true EP0397656A1 (en) | 1990-11-22 |
EP0397656B1 EP0397656B1 (en) | 1992-02-12 |
Family
ID=3547603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88909735A Expired - Lifetime EP0397656B1 (en) | 1987-12-10 | 1988-11-23 | Process and device for manufacturing tubes with helically arranged seams |
Country Status (6)
Country | Link |
---|---|
US (1) | US5079938A (en) |
EP (1) | EP0397656B1 (en) |
JP (1) | JPH03501582A (en) |
AT (1) | ATE72525T1 (en) |
DE (1) | DE3868415D1 (en) |
WO (1) | WO1989005201A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6339945B2 (en) * | 1998-01-27 | 2002-01-22 | Pacific Roller Die Co., Inc. | Apparatus for forming tapered spiral tubes |
WO2002058861A1 (en) * | 2001-01-26 | 2002-08-01 | Ovalformer Llc | Machine for producing spiral seamed pipe |
WO2002081111A1 (en) * | 2001-04-06 | 2002-10-17 | Nkt Flexibles I/S | A method for the manufacture of helically wound pipes |
IN2014MN01878A (en) * | 2013-02-28 | 2015-07-03 | Showa Rasenkan Seisakusho Co Ltd | |
US10814372B2 (en) * | 2017-06-07 | 2020-10-27 | Kwm Gutterman Inc. | Method for strategically marking a gutter |
IT201700086880A1 (en) * | 2017-07-31 | 2019-01-31 | Zeffiro | Continuous forming apparatus in seamed spiral ducts, forming and spiraling process |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH620607A5 (en) * | 1977-07-26 | 1980-12-15 | Schmidlin Ag | Device for the production of helically seamed and perforated tubes |
US4287739A (en) * | 1979-03-26 | 1981-09-08 | Syracuse Tank & Manufacturing | Method for producing a helically wound pipe having a predetermined diameter |
DE3137858C1 (en) * | 1981-09-18 | 1983-07-07 | Mannesmann AG, 4000 Düsseldorf | Method and apparatus for regulating the bending of the strip edge in the production of helical-seam tubes |
JPS58192617A (en) * | 1982-05-07 | 1983-11-10 | Kubota Ltd | Method for detecting error of outside diameter of spiral steel pipe |
DE3324463A1 (en) * | 1983-07-07 | 1985-01-17 | Blohm + Voss Ag, 2000 Hamburg | Process for the production of helical seam tubes |
JPS60232835A (en) * | 1984-04-30 | 1985-11-19 | Toyoda Gosei Co Ltd | Automatically installing method and device of clip for weather strip |
DE3500615A1 (en) * | 1985-01-10 | 1986-07-10 | Heinz Dipl.-Ing. 2000 Hamburg Krakow | Method for overcoming the problems of a strip sabre in the production of helical-seam tubes |
-
1988
- 1988-11-23 EP EP88909735A patent/EP0397656B1/en not_active Expired - Lifetime
- 1988-11-23 AT AT88909735T patent/ATE72525T1/en not_active IP Right Cessation
- 1988-11-23 US US07/474,799 patent/US5079938A/en not_active Expired - Fee Related
- 1988-11-23 WO PCT/AT1988/000100 patent/WO1989005201A1/en active IP Right Grant
- 1988-11-23 DE DE8888909735T patent/DE3868415D1/en not_active Expired - Lifetime
- 1988-11-23 JP JP63509186A patent/JPH03501582A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8905201A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0397656B1 (en) | 1992-02-12 |
ATE72525T1 (en) | 1992-02-15 |
JPH03501582A (en) | 1991-04-11 |
DE3868415D1 (en) | 1992-03-26 |
WO1989005201A1 (en) | 1989-06-15 |
US5079938A (en) | 1992-01-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE60131788T2 (en) | Profile rolling machine | |
EP0913352B1 (en) | Buckling folder and method for registration control of a buckling folder | |
DE69014934T2 (en) | Device for forming screw seam tubes. | |
DE2253025C3 (en) | Device for the production of screw sutures | |
DE2939014C2 (en) | Device for applying a metallic conductor to a non-conductive tape having openings | |
EP0656310B1 (en) | Method and apparatus for producing a laminate | |
DE2724899B2 (en) | Device on a film tube winding machine for controlling a cutting element | |
DE2212382C3 (en) | Process for the manufacture and / or testing of welded screw seam pipe made of sheet steel | |
EP0944444B1 (en) | Arrangement for shaping a helical pipe | |
DE2735402C2 (en) | Method and device for tracing the path on the basis of marking points | |
EP3965973A1 (en) | Forming machine and method for producing bent parts from an insulated elongate material having stripped ends | |
EP2148751B1 (en) | Method and device for bending sheet metal sections | |
EP0397656A1 (en) | Process and device for manufacturing tubes with helically arranged seams. | |
EP1867593A1 (en) | Method and device for treating a running web | |
DE1615066C3 (en) | Apparatus for producing a high-frequency coaxial cable | |
DE2549546C2 (en) | Device for the electrical control of a gripper for blanks cut to length from bar material | |
EP2428599B1 (en) | Cone warping machine and method for operating a cone warping machine | |
EP2110197B1 (en) | Method and welding device for determining the welding electric current to be applied during welding of can bodies | |
DE4340996C1 (en) | Method and device for producing a film laminate | |
EP0162371B1 (en) | Foil feeder for a tube production machine | |
WO2007144185A1 (en) | Method of, and apparatus for, processing a moving material web | |
EP2651621B1 (en) | Device and method for manufacturing tubular bodies | |
EP1069963B1 (en) | Method and device for producing cambered sections of spring band | |
EP4175773A1 (en) | Straightening machine and method for straightening a metal strip or a flat metal part | |
EP0162139A2 (en) | Device for seizing or/and controlling the edge position of paper webs in machines for making corrugated board, or a similar machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19900606 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE FR GB LI SE |
|
17Q | First examination report despatched |
Effective date: 19910610 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT CH DE FR GB LI SE |
|
REF | Corresponds to: |
Ref document number: 72525 Country of ref document: AT Date of ref document: 19920215 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3868415 Country of ref document: DE Date of ref document: 19920326 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
ET | Fr: translation filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19921123 Ref country code: AT Effective date: 19921123 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19921124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19921130 Ref country code: CH Effective date: 19921130 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19921123 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19930730 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19930803 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 88909735.8 Effective date: 19930610 |