EP1393827A2 - Verfahren zum Kaltziehen von Rohren - Google Patents
Verfahren zum Kaltziehen von Rohren Download PDFInfo
- Publication number
- EP1393827A2 EP1393827A2 EP03090273A EP03090273A EP1393827A2 EP 1393827 A2 EP1393827 A2 EP 1393827A2 EP 03090273 A EP03090273 A EP 03090273A EP 03090273 A EP03090273 A EP 03090273A EP 1393827 A2 EP1393827 A2 EP 1393827A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- amplitude
- actual
- crosshead
- ultrasound
- frequency
- 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
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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 OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/006—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing using vibratory energy
Definitions
- the invention relates to a method for cold drawing pipes with ultrasonically excited external and / or internal tool according to the preamble of patent claim 1.
- the object of the invention is to improve a method of the generic type in that the ultrasonic excitation of the outer and / or inner tool for a reliable production Process.
- the predetermined amplitude is during the drawing process kept constant in a narrow-band range, the minimum value of the amplitude Is 10 ⁇ m.
- the amplitude is preferably> 15 ⁇ m.
- the fluctuation range the amplitude is max. ⁇ 1% of the set value. The same can be done for the Frequency occur, whereby the process influence is much less.
- the frequency is preferably in a range around 20 kHz with a maximum fluctuation range of ⁇ 300 Hz. Lowering to below 15 kHz is not recommended because of the danger there is ultrasonic excitation in the audible range. Higher frequencies d. H. over 30 kHz are cheaper for higher pulling speeds, but because the The individual parts of the ultrasound transmitter are becoming shorter and shorter in the same range increasingly filigree and mechanical engineering increasingly difficult to implement.
- At least the ACTUAL diameter preferably the ACTUAL diameter and the ACTUAL wall thickness, and compared with a TARGET value. If the deviation is inadmissible, the amplitude and / or the frequency changes.
- the actual diameter and the actual wall thickness are also preferably on the inlet side recorded and set in relation to the TARGET-ACTUAL comparison on the outlet side and changes at least one reference variable of ultrasound generation depending on the tendency.
- This proposed procedure has the advantage that the known effect the friction reduction by ultrasonic excitation is used quantitatively for the product becomes. Inadmissible deviations from the TARGET value are linked back to the command variables the ultrasound excitation, which is primarily the amplitude and frequency are.
- the actual diameter is preferably detected by a laser measurement and the detection of the actual wall thickness by ultrasound.
- the latter measurement method is preferred carried out without coupling agents.
- the detection of the roughness of the external and / or the inner surface of the tube are included. This too, the quality Characteristic of the product is characterized by ultrasonically excited interior and / or Outside tools influenced in terms of smoothing.
- Another characteristic is the change in the texture of the pipe after drawing.
- the characteristic of the main crystal direction in the longitudinal and transverse directions is from Interest.
- the texture can be recorded using a linear polarized transit time measurement Sound waves once in the longitudinal and once in the transverse direction. As a result of the reduction in friction due to the ultrasound excitation of the drawing tools, the texture effect is reduced to count.
- FIG. 1 shows a longitudinal section of a schematically illustrated cold drawing process
- FIG. 2 shows a plan view of the US system arranged in the tool area.
- FIG. 1 shows a longitudinal drawing of a cold drawing process with an ultrasonically excited drawing ring 1.
- the ultrasound excitation is indicated here by two vibrations acting on the drawing ring 1.
- the pipe 3 to be cold-formed can be a hot-made or an already cold-drawn one Tube. It is characterized by the outer diameter 4 on the inlet side and the wall thickness 5. The roughness of the outer 6 and inner surface 7 can also be significant Feature.
- the contour of the central opening of the drawing ring 1 essentially determines the degree of desired forming.
- the direction of pull is marked with an arrow 8.
- the drawn Tube 9 is on the outlet side due to the outer diameter 10 and the wall thickness 11 characterized.
- the actual value of the outer is on the outlet side Diameter 10 and the actual value of the wall thickness 11 detected and with a predetermined TARGET value compared. If this comparison results in an impermissible deviation, then at least one reference variable of the ultrasound excitation for the drawing ring 1 is influenced taken.
- the amplitude of the ultrasound excitation is primarily changed. But it can do it alone or the frequency can be changed in combination.
- Another control option results from changing the pulling speed as a reference variable for the Kattzieh compiler.
- the proposed method can be refined by looking at the actual values for Diameter 4 and wall thickness 5 on the inlet side are also recorded and related sets to the target-actual comparison on the outlet side. Depending on the requirements of the product the evaluation of the surface roughness can also be important.
- the capture of the Diameter is preferably done by laser and the wall thickness by a coupling agent-free Ultrasonic methods.
- Figure 2 shows a top view of the details of the device according to the invention.
- she consists of an ultrasound transmitter 14, 14 'arranged on the right and left, which is connected via a mechanical transmission means 15, 15 'to one attached to a drawing plate 17 Act cross head 16.
- the transmission means 15, 15 ' is also referred to as a booster.
- the cross head 16 is designed in its dimension and contour so that the in the ultrasonic transmitter 14, 14 'generated ultrasonic waves are deflected in the direction of drawing.
- the Vibration directions are each identified by a double arrow 18, 18 '19.
- the outer tool 20 here in the form of a drawing ring, is in a rod-shaped holding element 21 arranged. So that the antinode of the generated ultrasonic waves in Area of the outer tool 20, the distance between the outer tool 20 and crosshead 16 ideally exactly ⁇ / 2.
- the drawing plate 17, the crosshead 16 and the holding element 21 have a continuous channel 20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Forging (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
Description
Bezugszeichenliste | |
Nr. | Bezeichnung |
1 | Ziehring |
2 | Schwingung |
3 | Rohr (Einlaufseite) |
4 | äußerer Durchmesser (Einlaufseite) |
5 | Wanddicke (Einlaufseite) |
6 | Außenoberfläche (Einlaufseite) |
7 | Innenoberfläche (Einlaufseite) |
8 | Ziehrichtung |
9 | Rohr (Auslaufseite) |
10 | äußerer Durchmesser (Auslaufseite) |
11 | Wanddicke (Auslaufseite) |
12 | Außenoberfläche (Auslaufseite) |
13 | Innenoberfläche (Auslaufseite) |
14, 14' | Ultraschallgeber |
15, 15' | Übertragungsmittel (booster) |
16 | Kreuzkopf |
17 | Ziehschild |
18, 18', 19 | Schwingungsrichtung |
20 | Außenwerkzeug |
21 | Halteelement |
22 | Kanal |
Claims (15)
- Verfahren zum Kaltziehen von Rohren mit ultraschallenregtem Außen- und/oder Innenwerkzeug wobei die Erregung unter Vorgabe einer bestimmten Frequenz und Amplitude erfolgt
dadurch gekennzeichnet, dass während des Ziehvorganges mindestens die vorgegebene Amplitude in einem schmalbandigen Bereich konstant gehalten wird und der Mindestwert der Amplitude 10 µm beträgt. - Verfahren nach Anspruch 1
dadurch gekennzeichnet, dass der Schwankungsbereich für die Amplitude max. ± 1 % des Einstellwertes beträgt. - Verfahren nach Anspruch 1
dadurch gekennzeichnet, dass zusätzlich die Frequenz in einem schmalbandigen Bereich konstant gehalten wird und 20 kHz beträgt. - Verfahren nach Anspruch 3
dadurch gekennzeichnet, dass die Schwankungsbreite höchstens ± 300 Hz beträgt. - Verfahren nach den Ansprüchen 1 - 4
dadurch gekennzeichnet, dass das Außenwerkzeug mit Ultraschall beaufschlagt wird. - Verfahren nach den Ansprüchen 1 - 5
dadurch gekennzeichnet, dass auf der Auslaufseite mindestens der IST-Durchmesser des gezogenen Rohres erfasst und mit einem SOLL-Wert verglichen wird und bei unzulässiger Abweichung die Amplitude und/oder die Frequenz der Ultraschallerregung verändert wird. - Verfahren nach Anspruch 6
dadurch gekennzeichnet, dass auf der Auslaufseite auch die IST-Wanddicke erfasst wird. - Verfahren nach Anspruch 6 und 7
dadurch gekennzeichnet, dass auf der Einlaufseite der IST-Durchmesser und die IST-Wanddicke erfasst und in Beziehung gesetzt werden zum SOLL-IST-Abgleich auf der Auslaufseite und je nach Tendenz die Amplitude und/oder die Frequenz der Ultraschallerregung verändert werden. - Verfahren nach den Ansprüchen 6 - 8
dadurch gekennzeichnet, dass die Erfassung der Rauheit der Außen- und/oder Innenoberfläche des Rohres in den SOLL-IST-Abgleich mit einbezogen wird. - Verfahren nach einem der Ansprüche 6 - 9
dadurch gekennzeichnet, dass die Erfassung der Textur des Rohres auf der Ein- und Auslaufseite in den SOLL-IST-Abgleich mit einbezogen wird. - Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 mit einer Ziehbank und mindestens einem Außenwerkzeug, das in Kontakt ist mit einem mit einem Steuergerät verbundenen Ultraschallgeber
dadurch gekennzeichnet, dass quer zur Ziehrichtung rechts und links vom Außenwerkzeug (20) je ein Ultraschallgeber (14, 14') angeordnet ist, die auf einen in Ziehrichtung liegenden mit dem Außenwerkzeug verbundenen Kreuzkopf (16) einwirken. - Vorrichtung nach Anspruch 11
dadurch gekennzeichnet, dass der Kreuzkopf (16) in Abmessung und Form so gestaltet ist, dass die ursprünglich quer zur Ziehrichtung erzeugten Ultraschallwellen in Ziehrichtung umlenkbar sind. - Vorrichtung nach Anspruch 11 und 12
dadurch gekennzeichnet, dass das Außenwerkzeug (20) in einem Abstand von ca. λ/2 vom Kreuzkopf (16) entfernt in einem Halteelement (21) angeordnet ist. - Vorrichtung nach einem der Ansprüche 11 - 13
dadurch gekennzeichnet, dass der Kreuzkopf (16) und das Halteelement (21) einen Kanal (22) zum Durchführen des zu ziehenden Rohres aufweisen. - Vorrichtung nach einem der Ansprüche 11 - 14
dadurch gekennzeichnet, dass zwischen Ultraschallgeber (14, 14') und Kreuzkopf (16) je ein Übertragungselement (15, 15) angeordnet ist.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10240749 | 2002-08-29 | ||
DE10240749 | 2002-08-29 | ||
DE10340204 | 2003-08-28 | ||
DE10340204A DE10340204A1 (de) | 2002-08-29 | 2003-08-28 | Verfahren zum Kaltziehen von Rohren |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1393827A2 true EP1393827A2 (de) | 2004-03-03 |
EP1393827A3 EP1393827A3 (de) | 2004-03-31 |
EP1393827B1 EP1393827B1 (de) | 2005-10-26 |
Family
ID=31496756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03090273A Expired - Lifetime EP1393827B1 (de) | 2002-08-29 | 2003-08-28 | Verfahren zum Kaltziehen von Rohren und Vorrichtung zur Durchführung des Verfahrens |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1393827B1 (de) |
AT (1) | ATE307690T1 (de) |
DE (1) | DE50301468D1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006007853A1 (de) * | 2006-02-17 | 2007-08-30 | Bl Chemie Gmbh & Co. Kg | Ziehverfahren zum Umformen von Werkstücken aus metallischen Werkstoffen sowie Vorrichtung zur Durchführung des Verfahrens |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2638207A (en) * | 1947-11-17 | 1953-05-12 | Engineering Res Associates Inc | Method and apparatus for forming wire and the like |
GB1072726A (en) * | 1964-09-08 | 1967-06-21 | Erich Schmid | Improvements in or relating to draw-shaping operations |
US3657910A (en) * | 1969-09-16 | 1972-04-25 | Nippon Kokan Kk | Method and apparatus for cold drawing metal tubes |
GB2251570A (en) * | 1990-11-09 | 1992-07-15 | Technoform Sonics Limited | Improvements in or relating to vibratable ring-like structures |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU984547A2 (ru) * | 1981-07-31 | 1982-12-30 | Витебское отделение Института физики твердого тела и полупроводников АН БССР | Устройство дл волочени металла с наложением ультразвуковых колебаний на инструмент |
SU1299633A1 (ru) * | 1985-11-06 | 1987-03-30 | Донецкий политехнический институт | Ультразвуковой волновод-матрица |
-
2003
- 2003-08-28 EP EP03090273A patent/EP1393827B1/de not_active Expired - Lifetime
- 2003-08-28 AT AT03090273T patent/ATE307690T1/de active
- 2003-08-28 DE DE50301468T patent/DE50301468D1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2638207A (en) * | 1947-11-17 | 1953-05-12 | Engineering Res Associates Inc | Method and apparatus for forming wire and the like |
GB1072726A (en) * | 1964-09-08 | 1967-06-21 | Erich Schmid | Improvements in or relating to draw-shaping operations |
US3657910A (en) * | 1969-09-16 | 1972-04-25 | Nippon Kokan Kk | Method and apparatus for cold drawing metal tubes |
GB2251570A (en) * | 1990-11-09 | 1992-07-15 | Technoform Sonics Limited | Improvements in or relating to vibratable ring-like structures |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Derwent Publications Ltd., London, GB; AN 1983-800008 XP002269047 -& SU 984 547 A (VITEBSKIJ OTDEL I FIZ TVERDOG (SU)) 30. Dezember 1982 (1982-12-30) * |
DATABASE WPI Derwent Publications Ltd., London, GB; AN 1987-305096 XP002269046 -& SU 1 299 633 A (DO POLITEKH INST (SU)) 30. März 1987 (1987-03-30) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006007853A1 (de) * | 2006-02-17 | 2007-08-30 | Bl Chemie Gmbh & Co. Kg | Ziehverfahren zum Umformen von Werkstücken aus metallischen Werkstoffen sowie Vorrichtung zur Durchführung des Verfahrens |
Also Published As
Publication number | Publication date |
---|---|
EP1393827B1 (de) | 2005-10-26 |
EP1393827A3 (de) | 2004-03-31 |
ATE307690T1 (de) | 2005-11-15 |
DE50301468D1 (de) | 2005-12-01 |
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