EP0774306B1 - Verfahren und Vorrichtung zum Geradeausziehen langen Ziehgutes in mehreren Schritten - Google Patents
Verfahren und Vorrichtung zum Geradeausziehen langen Ziehgutes in mehreren Schritten Download PDFInfo
- Publication number
- EP0774306B1 EP0774306B1 EP96250248A EP96250248A EP0774306B1 EP 0774306 B1 EP0774306 B1 EP 0774306B1 EP 96250248 A EP96250248 A EP 96250248A EP 96250248 A EP96250248 A EP 96250248A EP 0774306 B1 EP0774306 B1 EP 0774306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- force
- units
- drawing die
- unit
- 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
- B21C1/27—Carriages; Drives
- B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
- B21C1/20—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes from stock of essentially unlimited length
Definitions
- the invention relates to a method and a device for pulling elongated metallic workpieces, especially pipes, according to the preamble of Claims 1, 4 and 7.
- a wire drawing system is known from US Pat. No. 4,662,203, in which several drawing units are used are arranged one behind the other. The tension in the wire is measured between them and a comparison is made with predetermined values. In the event of deviations, the The speed of the slide is changed.
- EP 0182922 describes a generic method and known a devices for performing this method, in which between two drawing stages, the drawing material is at least temporarily wanted out of its axis is deflected so that a buffer can form, by which the drawing material is torn is prevented.
- the disadvantage of this method is the high level of mechanical engineering Effort and the space required for the device to deflect the drawing material.
- a method is proposed that is characterized in that at least one of the drawing ring holders can be moved so that the drawing units are so independently and / or are torque controlled, that during the drawing process in the a defined workpiece section between the drawing units always a deflection of the workpiece from the straight line prevents pre-tensioning force is maintained.
- the disadvantages of State of the art proposed to dispense with loop formation, so to obtain a compact, clear and inexpensive pulling device.
- the actual value of the pulling force permanently measured and with a default value stored in a computer is compared and that a signal when the specified value is exceeded or undershot is given to the drive or drives of one or more drawing units to the Adjust the pulling force to the default value.
- a limit torque curve is formed, which is used to control the Drive of the respective drawing unit is used.
- the limit torque curve is intended to ensure that the tension between two neighboring drawing units is kept as low as possible, so that the ductility of the Draw material can be used optimally.
- the respective drawing speed results from the pulling speed of the preceding unit and the stretching of the Drawings in the current drawing unit. Because this stretch has certain tolerances subject, it must be ensured that there is neither an oversupply Drawn goods still at an impermissibly high pulling force between two neighboring ones Drawing units is coming.
- the present description of the force effect refers to neighboring ones Drawing machines, the drawing ring holder of which is rigid with the machine in a known manner are connected. Conversely, if one of the drawing ring holders, preferably the holder of the second machine following a first machine depending on the Total force is controlled so that the directions of force also change.
- An apparatus for performing the method according to the invention is therefore characterized in that at least one drawing ring holder is movable, that at least one drawing ring holder of a drawing unit with a measuring device for permanent detection of the pulling force is provided and or the drawing ring holder depending on the measured value force and / or Torque-controlled can be moved or clamped in the longitudinal direction of the workpiece is.
- the drawing force is measured and specified as the specification of the holding and moving device for the respective drawing ring holder. If the device for holding and moving the drawing ring holder is regulated in a force-dependent manner so that it remains in position, any excess supply of drawn material will lead to a tendency of the drawing ring holder to move in the drawing direction. If the measured total force decreases due to the movement of the drawing ring holder, the speed of the drive motor of the following machine must be increased accordingly. If the measured total force does not change due to such a method of the drawing ring holder, other reasons such as drawn material tolerances or lubrication influences are the cause for the increase in the total force and can be countered by increasing the holding force for the drawing ring holder. Since it is inevitable in practice that tears occasionally occur during pulling, these can be registered directly by the permanent pulling force measuring devices and cause all pulling devices to open.
- the measuring device consists of a between the drawing ring holder and Pull ring arranged load cell.
- optical sensors between the drawing units provide for regulating and / or switching off the drives with the computer are linked.
- Such light curtains between two pulling units for monitoring the position of the drawn material can be used for additional monitoring of Pipe rippers are used as well as for additional control of a Excess material between two drawing units.
- the pull-in process is therefore started when the pull ring holder and the front one Pull sledges have their shortest possible distance from each other. Now simultaneously with the pulling in of the pipes by the auxiliary device of the drawing ring holder retracted against pulling direction under pulling force, so the length of the retracted pipe accordingly. This allows the Pull-in operation completed and thus significantly shortened.
- the two drawing carriages of the drawing unit preferably transport the detected one Workpiece alternating with the drawing ring following in the drawing direction, where the Repeat pulling in steps a through d.
- the idea of the invention is illustrated by an exemplary embodiment explained.
- the only drawing figure shows the arrangement of two drawing units.
- the Drawing rings (1, 2) are against the drawing ring holder (3, 4) by means of load cells (5, 6) supported.
- the drawing ring holders (3, 4) are mounted in a moving device (7, 8), which is supported against a hydraulic cylinder (9, 10).
- the drawn material is drawn by two alternating pulling slides (11, 12) and (13, 14), the Clamping jaws (15, 16) are then closed when they move in the pulling direction and open when they go back against the direction of pull. Pulling force and alternating carriage movements are generated by the drive motors (17, 18).
- the pulling slides (11, 13) are in their front Dead center.
- the drawing ring holder (3, 4) in turn are in their rear dead centers, d. H. just in front of the slide, (11, 13). A beginning of a drawing with a rod is pushed through the pull ring (1) so far that one is in the plane of the pull slide located auxiliary pulling device can span the fishing rod.
- the drawing ring holder (3) and drawing slide (11) preferably move in opposite direction from their dead center position and thus create a drawn Pipe rod according to the sum of both travel paths.
- the auxiliary puller will opened and the pull ring holder moves in the pulling direction up to Starting dead center and transports the drawing material so far forward that it is from the jaws (15) of the drawing carriage (11) can be gripped. Alternating now pull the slide (11, 13) the material to be drawn up to the drawing ring (2).
- the pulling-in process will now be described as for pulling unit (1) repeated.
- the jaws (15, 16) in the Pull slide (11, 12) opened and the cylinder (9) released from pressure.
- the measured Pulling force serves as a control variable for the torque of the second drawing unit.
- the Load cell (6) determine the pulling force and share this with the control mechanism of the Hydraulic cylinder (10) with a corresponding holding force on the Draw ring holder (4) exercises.
- a computer program takes into account the dynamics and kinematics of the Carriage drive, the mechanical losses and the measured pulling force thereof Torque so that the ductility limit of the drawn goods by one certain amount is undershot and that the drawn material between the two Drawing units is exposed to a low defined tension. Increases the required pulling force during pulling, the pull ring holder (3) is countered pushed the cylinder (10) back. This reduces the total force on the Die again to the size registered when pulling it in, that's enough Pulling speed in the second unit does not extend and the speed of the motor (18) must be increased.
- a scanning roller (19) on the drawing material permanently measures that current drawing speed. If the pulling speed measured in this way is lower than that determined from the pulling sled, the jaws slip. For the The values of the scanning roller are then decisive for speed control.
- the Speed difference may be used to cancel the pulling process
- Checking the clamping conditions can be used.
- a light curtain (20) controls the axial position of the drawn material. If the regulation no longer occurs controllable oversupply of drawn goods, tries to avoid them or even to buckle. This is registered and used to influence the regulation or Stopping the units used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Wire Processing (AREA)
Description
Ändert sich die gemessene Summenkraft durch ein solches Verfahren des Ziehringhalters nicht, so sind andere Gründe wie Ziehguttoleranzen oder Schmiereinflüsse die Ursache für die Erhöhung der Summenkraft und ihr kann durch Erhöhen der Haltekraft für den Ziehringhalter begegnet werden.
Da es beim Ziehen in der Praxis unvermeidlich ist, daß gelegentlich Reißer auftreten, können diese durch die permanenten Ziehkraftmeßeinrichtungen unmittelbar registriert werden und ein Öffnen aller Zieheinrichtungen bewirken.
Claims (8)
- Verfahren zum Ziehen von langgestreckten metallischen Werkstücken, insbesondere Rohren zur Querschnittsverminderung in mehr als einer Ziehstufe mittels mindestens zweier aufeinanderfolgender, das Werkstück am äußeren Umfang greifender Ziehaggregate mit je zwei alternierend bewegten Spannschlitten, die das Werkstück kontinuierlich durch je einen jedem Ziehaggregat zugeordneten, in einem Ziehringhalter angeordneten Ziehring ziehen,
dadurch gekennzeichnet,dass mindestens einer der Ziehringhalter verfahrbar ist,dass die Ziehaggregate unabhängig voneinander derartig kraft- und/oder momentengeregelt antreibbar sind, dass während des Ziehvorganges in dem zwischen den Ziehaggregaten befindlichen Werkstückabschnitt stets eine definierte, ein Auslenken des Werkstückes aus der Geraden verhindernde Vorspannkraft aufrechterhalten wird. - Verfahren zum Ziehen von langgestreckten metallischen Werkstücken, nach Anspruch 1,
dadurch gekennzeichnet,
dass der Istwert der Ziehkraft permanent gemessen und mit einem in einem Rechner abgelegeten Vorgabewert verglichen wird, dass beim Über- oder Unterschreiten des Vorgabewertes ein Signal an den oder die Antriebe eines oder mehrerer Ziehaggregate gegeben wird, um die Ziehkraft an den Vorgabewert anzupassen - Verfahren zum Ziehen von langgestreckten metallischen Werkstücken, nach Anspruch 2,
dadurch gekennzeichnet,
dass beim Einziehen des Rohres in das jeweilige Ziehaggregeat die Ziehkraft gemessen und als Vorgabe einer Rückhalte und/oder Zugkraft dem Rechner zugeführt wird, in dem in Überlagerung mit Beschleunigungsmomenten und Verlustmomenten der Ziehaggregate in Abhängigkeit von der momentanen Ziehgeschwindigkeit eine Grenzmomentenverlauf gebildet wird, der zur Regelung des Antriebes des oder der jeweiligen Ziehaggregate verwertet wird. - Vorrichtung zum Ziehen von langgestreckten metallischen Werkstücken, insbesondere Rohren zur Querschnittsverminderung in mehr als einer Ziehstufe mittels mindestens zweier aufeinanderfolgender, das Werkstück am äußeren Umfang greifender Ziehaggregate mit zwei alternierend bewegten Spannschlitten, die das Werkstück kontinuierlich durch je einen jedem Ziehaggregat zugeordneten, in einem Ziehringhalter angeordneten Ziehring ziehen,
dadurch gekennzeichnet,dass mindestens ein Ziehringhalter (3,4) verfahrbar ausgebildet ist,dass mindestens ein Ziehringhalter (3,4) eines Ziehaggregates (A,B) mit einer Meßvorrichtung (5,6) zur permanenten Erfassung der Ziehkraft versehen ist und der oder die Ziehringhalter (3,4) in Abhängigkeit von dem Meßwert kraft- und/oder momentengeregelt in Längsrichtung (7,8) des Werkstückes verfahrbar oder festklemmbar ist(sind). - Vorrichtung zum Ziehen von langgestreckten metallischen Werkstücken nach Anspruch 4,
dadurch gekennzeichnet,
dass die Meßvorrichtung (5,6) aus einer zwischen Ziehringhalter (3,4) und Ziehring (1,2) angeordneten Kraftmeßdose besteht. - Vorrichtung zum Ziehen von langgestreckten metallischen Werkstücken nach Anspruch 5,
dadurch gekennzeichnet,
dass zur Erfassung eines ungewollten Ausweichens des Werkstückes aus der Ziehachse optische Sensoren (20) zwischen den Ziehaggregaten (A,B) vorgesehen sind, die zum Regeln und/oder Abschalten der Antriebe (17,18) mit dem Rechner verknüpft sind. - Verfahren zum Einfädeln eines langgestreckten Werkstückes mittels einer Hilfsvorrichtung in eine Vorrichtung zum Ziehen von langgestreckten metallischen Werkstücken, insbesondere Rohren, zur Querschnittsverminderung in mehr als einer Ziehstufe mittels mindestens zweier aufeinanderfolgender, das Werkstück am äußeren Umfang greifender Ziehaggregate mit je zwei alternierend bewegten Spannschlitten, die das Werkstück kontinuierlich durch je einen jedem Ziehaggregat zugeordneten, in einem in Längsrichtung des Werkstückes verfahrbaren oder festklemmbaren Ziehringhalter angeordneten Ziehring ziehen gekennzeichnet durch die Abfolge folgender Arbeitsschritte:a. der verfahrbare Ziehringhalter und der dem Ziehring zugewandte Spannschlitten des Ziehaggregeates werden in die Stellung verschoben, in der sie den geringsten Abstand zueinander aufweisen,b. der Werkstückanfang wird in den Ziehring eingeführt und mit einer vor dem Ziehaggregat angeordneten Hilfseinrichtung festgehalten,c. der Ziehringhalter wird mit dem Ziehring entgegen der Ziehrichtung zurückgefahren, wodurch die Länge des eingezogenen Werkstückes verlängert wird,d. nach Öffnen der Hilfseinrichtung werden der Ziehringhalter und der Ziehring mit dem eingezogenen Werkstück in Ziehrichtung zurückbewegt und in die Spannbacken des Ziehschlittens des Ziehaggregates eingeführt und dort geklemmt.
- Verfahren zum Einfädeln eines langgestreckten Werkstückes in eine Vorrichtung zum Ziehen von langgestreckten metallischen Werkstücken nach Anspruch 7
dadurch gekennzeichnet,
dass die beiden Ziehschlitten des Ziehaggregates das erfaßte Werkstück alternierend zu dem in Ziehrichtung folgenden Ziehring transportieren, wo sich der Einziehvorgang mit den Schritten a bis d wiederholt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19544383 | 1995-11-15 | ||
| DE19544383A DE19544383C1 (de) | 1995-11-15 | 1995-11-15 | Verfahren und Vorrichtung zum Geradeausziehen und Einfädeln langen Ziehgutes in mehreren Schritten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0774306A1 EP0774306A1 (de) | 1997-05-21 |
| EP0774306B1 true EP0774306B1 (de) | 2001-07-25 |
Family
ID=7778633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96250248A Expired - Lifetime EP0774306B1 (de) | 1995-11-15 | 1996-10-31 | Verfahren und Vorrichtung zum Geradeausziehen langen Ziehgutes in mehreren Schritten |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5771727A (de) |
| EP (1) | EP0774306B1 (de) |
| AT (1) | ATE203434T1 (de) |
| DE (2) | DE19544383C1 (de) |
| ES (1) | ES2158237T3 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2800652A1 (fr) * | 1999-11-04 | 2001-05-11 | Financ Robolix | Procede et dispositif de controle de la qualite des formages realises par une machine a former des extremites de tubes |
| CN1099331C (zh) * | 2000-05-26 | 2003-01-22 | 清华大学 | 弹性合金的电子拔丝方法与装置 |
| JP4267221B2 (ja) | 2001-01-18 | 2009-05-27 | 日本伸管株式会社 | 長尺物の連続引抜き方法及びその装置 |
| DE10122658C2 (de) * | 2001-05-10 | 2003-05-28 | Sms Meer Gmbh | Zugeinheit zum Ziehen von langgestrecktem Material sowie Ziehstraße |
| DE10122657B4 (de) * | 2001-05-10 | 2006-07-13 | Sms Meer Gmbh | Zugeinheit für eine Ziehmaschine sowie Verfahren zum Ziehen eines Ziehgutes mit dieser Zugeinheit und diskontinuierlich arbeitende Ziehmaschine |
| KR100903956B1 (ko) | 2007-12-21 | 2009-06-25 | (주)대신제일 | 복합 인발장치 |
| AT507273B1 (de) * | 2008-09-14 | 2014-03-15 | Sms Meer Gmbh | Gradausziehmaschine und verfahren zum gradausziehen eines werkstückes |
| DE102013021675A1 (de) | 2013-12-18 | 2015-07-02 | Joachim Graefe | Profile und Rohre kontinuierlich-integriert formen |
| DE102016106026B3 (de) * | 2016-04-01 | 2017-10-05 | Sms Group Gmbh | Ziehanlagen und Ziehverfahren |
| CN110153207B (zh) * | 2018-12-04 | 2021-04-23 | 上海北特科技股份有限公司 | 棒材直条连续拉拔装置及利用其实现的棒材拉拔方法 |
| CN111515319A (zh) * | 2020-04-19 | 2020-08-11 | 金成高 | 一种用于建筑施工的预应力钢筋拉伸装置 |
| CN117399449B (zh) * | 2023-11-27 | 2026-01-06 | 江西广信新材料股份有限公司 | 一种高纯无氧铜棒的拉拔设备 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3138243A (en) * | 1962-04-02 | 1964-06-23 | Oakley Ind Inc | Drawing apparatus |
| DE1930700B2 (de) * | 1969-06-18 | 1971-01-28 | ||
| DE2132408C3 (de) * | 1971-06-30 | 1982-03-11 | Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn | Anordnung zur Beeinflussung der Drehzahl der Elektromotoren der Einzelantriebe einer Mehrfachziehanlage |
| US4127999A (en) * | 1974-12-19 | 1978-12-05 | Th. Kieserling & Albrecht | Gripping arrangement |
| DE2600898C3 (de) * | 1976-01-12 | 1980-08-28 | Th. Kieserling & Albrecht, 5650 Solingen | Spann- und Auszugseinrichtung für Schälmaschinen und Ziehbänke |
| DE2806380C3 (de) * | 1978-02-13 | 1980-11-06 | Mannesmann Ag, 4000 Duesseldorf | Schlittenziehmaschine |
| JPS6174724A (ja) * | 1984-09-20 | 1986-04-17 | Toshiba Corp | 直列配置多段式伸線装置 |
| EP0182922B1 (de) * | 1984-10-19 | 1990-01-03 | Schumag Aktiengesellschaft | Verfahren zum Geradeausziehen von Rundmaterial und Rohren sowie Voll- und Hohlprofil und Anlage hierzu |
| DE3729892A1 (de) * | 1987-09-07 | 1989-03-23 | Kieserling Ziehmaschinen | Ziehmaschine |
-
1995
- 1995-11-15 DE DE19544383A patent/DE19544383C1/de not_active Expired - Fee Related
-
1996
- 1996-10-31 DE DE59607353T patent/DE59607353D1/de not_active Expired - Fee Related
- 1996-10-31 EP EP96250248A patent/EP0774306B1/de not_active Expired - Lifetime
- 1996-10-31 ES ES96250248T patent/ES2158237T3/es not_active Expired - Lifetime
- 1996-10-31 AT AT96250248T patent/ATE203434T1/de not_active IP Right Cessation
- 1996-11-15 US US08/749,819 patent/US5771727A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59607353D1 (de) | 2001-08-30 |
| US5771727A (en) | 1998-06-30 |
| ATE203434T1 (de) | 2001-08-15 |
| EP0774306A1 (de) | 1997-05-21 |
| ES2158237T3 (es) | 2001-09-01 |
| DE19544383C1 (de) | 1997-04-10 |
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