EP0806252B1 - Method for operating an arrangement of roll stands - Google Patents
Method for operating an arrangement of roll stands Download PDFInfo
- Publication number
- EP0806252B1 EP0806252B1 EP97106345A EP97106345A EP0806252B1 EP 0806252 B1 EP0806252 B1 EP 0806252B1 EP 97106345 A EP97106345 A EP 97106345A EP 97106345 A EP97106345 A EP 97106345A EP 0806252 B1 EP0806252 B1 EP 0806252B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- roll
- preliminary
- stands
- stzg
- 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
Links
- 238000000034 method Methods 0.000 title claims description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 48
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 2
- 238000012432 intermediate storage Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 3
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/14—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel in a non-continuous process, i.e. at least one reversing stand
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
Definitions
- the invention relates to a method for operating a roll stand system, which consists of one or more roughing stands, to which over Connecting roller tables and a cross conveyor a cross a compact rolling group offset to the roughing stands, which consist of a first and a second universal scaffold or duo scaffold and an intermediate intermediate scaffold arranged between them consists, the rolling mill system, from a continuous casting incoming pre-profiles are fed directly or after interim storage become.
- these mill stands are operated so that the from the roughing stands the rolled strand in the compact rolling group Roll formed in an odd number of passes becomes.
- An even number has also been suggested Number of passes through the compact rolling group to achieve that with appropriate arrangement of these roughing stands to the continuous casting device, the preliminary profile against the rolling direction introduced into these roughing stands and then the rolled strand was brought into the compact rolling group at its rear end.
- the invention has set itself the task of performance to increase the compact rolling group in that the possibility is created depending on the actually required numbers of Deformation stitches in the compact rolling group the number and order of the passes of the rolling stock strand optimally.
- the roll stand system can be trained that behind the second universal scaffold or Duo scaffolding arranged another second transverse transport device which is an extension of the from the roughing stands to the first cross transport device leading connecting roller table with this is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betreiben einer Walzgerüstanlage, die aus einem oder mehreren Vorgerüsten besteht, denen über Verbindungsrollgänge und eine Quertransporteinrichtung eine quer zu den Vorgerüsten versetzte Kompaktwalzgruppe nachgeordnet ist, die aus einem ersten und einem zweiten Universalgerüst oder Duo-Gerüst und einem zwischen diesen angeordneten Stauchzwischengerüst besteht, wobei der Walzgerüstanlage, aus einer Stranggußeinrichtung kommende Vorprofile direkt oder nach Zwischenlagerung zugeführt werden.The invention relates to a method for operating a roll stand system, which consists of one or more roughing stands, to which over Connecting roller tables and a cross conveyor a cross a compact rolling group offset to the roughing stands, which consist of a first and a second universal scaffold or duo scaffold and an intermediate intermediate scaffold arranged between them consists, the rolling mill system, from a continuous casting incoming pre-profiles are fed directly or after interim storage become.
In der Regel werden diese Walzgerüstanlagen so betrieben, daß der von den Vorgerüsten walzbeaufschlagte Walzgutstrang in der Kompaktwalzgruppe in einer ungeraden Anzahl von Durchläufen walzverformt wird. Es wurde auch schon vorgeschlagen, jeweils eine geradzahlige Anzahl von Durchläufen durch die Kompaktwalzgruppe dadurch zu erreichen, daß bei entsprechender Anordnung dieser Vorgerüste zur Stranggußeinrichtung das Vorprofil entgegen der Walzrichtung in diese Vorgerüste eingebracht und der Walzgutstrang dann mit seinem rückwärtigen Ende in die Kompaktwalzgruppe eingebracht wurde.As a rule, these mill stands are operated so that the from the roughing stands the rolled strand in the compact rolling group Roll formed in an odd number of passes becomes. An even number has also been suggested Number of passes through the compact rolling group to achieve that with appropriate arrangement of these roughing stands to the continuous casting device, the preliminary profile against the rolling direction introduced into these roughing stands and then the rolled strand was brought into the compact rolling group at its rear end.
Bei den Kompaktwalzgruppen in der beschriebenen Anordnung zweier Universalgerüste müssen deshalb z.B. für vier Hauptstiche jeweils zwei Durchläufe mehr gemacht werden. Werden aber nur ein Stich oder deren zwei mehr gebraucht, ist die Kompaktwalzgruppe unnötig lange belegt. Die Abstimmung der Belegung der Kompaktwalzgruppe auf die Leistung der das Vorprofil des Walzgutstranges liefernden Stranggußeinrichtung stellt bei modernen Walzgutanlagen dieser Art einen für die Gesamtleistung der Anlage wesentlichen Faktor dar. Diese Abstimmung muß so erfolgen, daß die Leistung der Walzgerüstanordnung immer um ein geringes Maß größer ist als die der Stranggießeinrichtung. Diese Abstimmung erlaubt es dann, bei der Gesamtanlage ein Kaltzwischenlager zwischen der Stranggußeinrichtung und der Walzgerüstanlage zu vermeiden.In the compact rolling groups in the arrangement described two Universal scaffolds must therefore e.g. for four main stitches each two more runs are made. But will only be a stitch or the compact roller group is unnecessarily long, the two more used busy. The coordination of the allocation of the compact rolling group to the Performance of the continuous casting device supplying the preliminary profile of the rolling stock provides one for modern rolling mill systems of this type the overall performance of the plant is an essential factor. This coordination must be such that the performance of the rolling mill arrangement is always slightly larger than that of the continuous caster. This coordination then allows one in the overall system Cold intermediate storage between the continuous casting device and the roll stand system to avoid.
Ausgehend von der Erkenntnis, daß die der Kompaktwalzgruppe vorgeordneten Vorgerüste, meist ein Vertikal- und/oder ein Horizontalstauchgerüst für die Formung des Walzgutstranges, wesentlich weniger Walzzeit benötigen als die nachfolgende Kompaktwalzgruppe und, daß daher in erster Linie die Leistung der Kompaktwalzgruppe gesteigert werden muß, um den oben erwähnten Leistungserfordernissen zu entsprechen, hat sich die Erfindung die Aufgabe gestellt, die Leistung der Kompaktwalzgruppe dadurch zu erhöhen, daß die Möglichkeit geschaffen wird, je nach den tatsächlich erforderten Zahlen von Verformungsstichen in der Kompaktwalzgruppe die Anzahl und Reihenfolge der Durchläufe des Walzgutstranges optimal festzulegen.Based on the knowledge that the upstream of the compact rolling group Roughing stands, usually a vertical and / or horizontal upsetting stand for the formation of the rolled stock, much less Rolling time required as the subsequent compact rolling group and that therefore primarily the performance of the compact rolling group increased in order to meet the performance requirements mentioned above, the invention has set itself the task of performance to increase the compact rolling group in that the possibility is created depending on the actually required numbers of Deformation stitches in the compact rolling group the number and order of the passes of the rolling stock strand optimally.
Diese Aufgabe wird dadurch gelöst, daß der von den Vorgerüsten walzbeaufschlagte Walzgutstrang in Abhängigkeit von der, von dem jeweiligen Walzprogramm vorgegebenen Stichzahl der Kompaktwalzgruppe wahlweise von der einen oder der anderen Einlaufseite zugeführt wird.This problem is solved in that of the roughing stands Rolled rolling stock depending on the from which given number of passes in the respective rolling program of the compact rolling group optionally fed from one or the other inlet side becomes.
Während bei den bekannten Verfahren mit Anstich von ein und derselben Seite der Kompaktwalzgruppe her die Wahl der Stichzahl festgelegt war und z.B. bei einem Erfordernis, einen weiteren Stich zu machen, vier zusätzliche Stiche in der Form von Walzstichen oder Leerstichen unvermeidlich war, kann beim erfindungsgemäßen Verfahren den tatsächlichen Verformungserfordernissen entsprechend, die Zahlen der Durchläufe optimal ausgewählt und damit erhebliche Leistungssteigerungen der Kompaktwalzgruppe erzielt werden. While in the known methods with tapping of one and the same On the side of the compact roller group, the choice of number of passes is determined was and e.g. if a need to take another stitch make four additional stitches in the form of roller stitches or Empty stitches were unavoidable in the method according to the invention the numbers according to the actual deformation requirements of the runs optimally selected and thus considerable increases in performance the compact rolling group can be achieved.
Wie die Erfindung weiter vorsieht, kann die Walzgerüstanlage so ausgebildet werden, daß hinter dem zweiten Universalgerüst bzw. Duogerüst eine weitere zweite Quertransporteinrichtung angeordnet wird, die über eine Verlängerung des von den Vorgerüsten zu der ersten Quertransporteinrichtung führenden Verbindungsrollgangs mit dieser verbunden ist.As the invention further provides, the roll stand system can be trained that behind the second universal scaffold or Duo scaffolding arranged another second transverse transport device which is an extension of the from the roughing stands to the first cross transport device leading connecting roller table with this is connected.
Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigen
- Fig. 1
- eine Walzwerksanlage in schematischer Darstellung in der Draufsicht und einen Stichablaufplan,
- Fig. 2
- eine andere Anordnung einer Walzwerksanlage und
- Fig. 3
- eine weitere Anordnung einer Walzwerksanlage.
- Fig. 1
- a rolling mill system in a schematic representation in plan view and a pass schedule,
- Fig. 2
- another arrangement of a rolling mill and
- Fig. 3
- another arrangement of a rolling mill.
Wie aus Fig. 1 zu ersehen, wird bei einer bekannten Walzwerksanlage
das nicht dargestellte, aus der ebenfalls nicht dargestellten
Stranggußeinrichtung kommende Vorprofil in Richtung des Pfeils E
mit einem Vorstich V1 in das Vorgerüst SVG, an dessen Stelle auch
mehrere Vorgerüste treten können, eingebracht mit einem folgenden
Reversierstich R1 und einem weiteren Vorwalzstich V2 vorverformt
und dann weiter in Richtung des ursprünglichen Pfeils E auf die
Quertransporteinrichtung QT aufgebracht und von dieser, querverschoben,
weiter in Richtung des Pfeils E in die aus dem Universalgerüst
UG1, dem Stauchzwischengerüst STZG und dem Universalgerüst
UG2 bestehende Kompaktwalzgruppe eingeführt, in der mit einem Stich
1, dem folgenden Reversierstich und dem sich anschließenden Stich
3, also nach insgesamt drei Stichen ein Walzvorgang mit Austritt
in Richtung des, in unterbrochenen Linien angedeuteten Pfeils A3
möglich ist. Soll der Walzgutstrang weiter walzverformt werden, dann
kann dies nach einem weiteren Reversierstich und dem anschließenden
Stich 5 in Richtung des Pfeils A5 erfolgen bzw. nach einem weiteren
Reversierstich und dem Stich 7 in Richtung des Pfeils A7. As can be seen from Fig. 1, in a known rolling mill system
the not shown, from the also not shown
Continuous casting device coming pre-profile in the direction of arrow E
with a preliminary stitch V1 in the roughing stand SVG, in its place also
several roughing stands can be inserted, introduced with a following one
Reversing stitch R1 and another roughing stitch V2 preformed
and then continue in the direction of the original arrow E on the
Transverse transport device QT applied and shifted by this,
continue in the direction of arrow E into the from the universal scaffold
UG1, the upsetting intermediate scaffold STZG and the universal scaffold
UG2 existing compact rolling group introduced in the one pass
1, the following reversing stitch and the subsequent stitch
3, i.e. after a total of three passes a rolling process with an exit
in the direction of the arrow A3 indicated by broken lines
is possible. If the strand of rolled material is to be further rolled, then
can do this after another reverse stitch and the subsequent one
Stitch 5 in the direction of arrow A5 or after another
Reverse stitch and
Bei der ebenfalls bekannten Walzwerksanlage nach Fig. 2 wickelt sich
die Formung des in Richtung des Pfeils E in die Vorgerüstgruppe SVG
eintretenden Walzgutes in der gleichen Weise ab, wie bei der Ausbildung
nach Fig. 1. Der vorgeformte Walzgutstrang wird dann, anders
als bei der Ausbildung nach Fig. 1 auf dem Rollgang R mit Abstand
parallel an der Kompaktwalzgruppe UG1, STZG, UG2 der Quertransporteinrichtung
QT zugeführt und, auf dieser querverschoben, entgegen
der Richtung des Pfeils E in der Richtung RE in die Kompaktwalzgruppe
eingeführt und dann entweder mit einem Stich und einem
folgenden Reversierstich, also insgesamt zwei Stichen, oder einem
weiteren Stich und folgenden Reversierstich, d.h. vier Stichen oder
einem weiteren folgenden Stich und Reversierstich, also insgesamt
sechs Stichen, fertiggewalzt. Bei der Ausbildung nach Fig. 1 waren
also für das Fertigwalzen die ungeradzahligen Stichfolgen 3, 5, 7
möglich und beim Ausführungsbeispiel nach Fig. 2 die geradzahligen
Stichfolgen 2, 4, 6.2 is also wound
the formation of the SVG in the direction of arrow E in the roughing stand group
entering rolling stock in the same way as in training
1. The preformed rolling stock is then different
than in the embodiment according to FIG. 1 on the roller table R at a distance
parallel to the compact roller group UG1, STZG, UG2 of the cross transport device
QT fed and, shifted on this, counter
the direction of arrow E in the direction RE in the compact rolling group
introduced and then either with one stitch and one
following reversing stitch, i.e. a total of two stitches, or one
another stitch and subsequent reversing stitch, i.e. four stitches or
another following stitch and reversing stitch, so total
six stitches, finished rolled. 1 were
So for finish rolling, the odd-numbered
Bei der erfindungsgemäßen Ausbildung der Walzwerksanlage nach Fig. 3 sind bei Anordnung der Vorgerüstgruppe SVG, querversetzt zu der Kompaktwalzgruppe UG1, STZG, UG2 zwischengeschalteter Quertransporteinrichtung QT1 ein an den Eingang dieser Quertransporteinrichtung anschließender, parallel an der Kompaktwalzgruppe UG1 STZG und UG2 parallel vorbeiführender Rollgang und eine an diesen anschließende zweite Quertransporteinrichtung QT2 vorgesehen. Mit dieser Anordnung können jetzt wahlweise die ungeradzahligen Stichfolgen Gemäß Fig. 1 oder die geradzahligen Stichfolgen gemäß Fig. 2 durchgeführt werden. Der vorgewalzte Walzgutstrang in dem einen Fall der Kompaktwalzgruppe UG1, STZG, UG2 über die Quertransporteinrichtung QT1 oder über die Quertransporteinrichtung QT2 zugeführt wird, wie dies aus den beiden diesen Quertransporteinrichtungen QT1 bzw. QT2 zugeordneten Stichfolgeplänen hervorgeht.In the inventive design of the rolling mill system according to Fig. 3 are arranged transversely to the arrangement of the roughing stand group SVG Compact roller group UG1, STZG, UG2 intermediate transverse transport device QT1 on to the entrance of this cross transport device subsequent, parallel to the compact rolling group UG1 STZG and UG2 parallel roller table and a subsequent one second transverse transport device QT2 provided. With this arrangement you can now optionally choose the odd-numbered sequences according to Fig. 1 or the even numbered stitch sequences according to FIG. 2 become. The pre-rolled strand in the one case of the compact rolling group UG1, STZG, UG2 via the cross transport device QT1 or is fed via the transverse transport device QT2, as this from the two these transverse transport devices QT1 and QT2 associated sequencing plans.
Claims (2)
- Method of operating a rolling mill according to claim 2, consisting of one or more preliminary roll stands (SVG), downstream of which is arranged, by way of connecting roller paths and a transverse transport equipment (QT), a compact roll group (UG1, STZG, UG2), which is offset relative to the preliminary roll stands (SVG) and consists of a first and a second universal roll stand (UG1, UG2) or two-high roll stand and an upsetting intermediate roll stand (STZG) arranged between these, wherein preliminary profile sections coming from continuous casting equipment are fed directly or after intervening storage to the rolling mill, characterised in that the roll stock strip rolled by the preliminary roll stands (SVG) is fed to the compact roll group (UG1, STZG, UG2) selectably from the one or the other lead-in side in dependence on the even or odd rolling pass number preset by the rolling schedule.
- Rolling mill for carrying out the method according to claim 1, consisting of one or more preliminary roll stands (SVG), downstream of which is arranged, by way of connecting roller paths and a transverse transport equipment (QT), a compact roll group (UG1, STZG, UG2), which is offset relative to the preliminary roll stands (SVG) and consists of a first and a second universal roll stand (UG1, UG2) or two-high roll stand and an upsetting intermediate roll stand (STZG) arranged between these, characterised by a further, second transverse transport equipment (QT2), which is arranged behind and similarly offset relative to the compact roll group (UG1, STZG, UG2) and which is connected at the entry side by way of an extension of the connecting roller path, which leads from the preliminary roll stands (SVG) to the first transverse transport equipment (QT1), with this transverse transport equipment (QT2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19618437 | 1996-05-08 | ||
| DE19618437A DE19618437A1 (en) | 1996-05-08 | 1996-05-08 | Method for operating a roll stand system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0806252A1 EP0806252A1 (en) | 1997-11-12 |
| EP0806252B1 true EP0806252B1 (en) | 1999-12-22 |
Family
ID=7793670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97106345A Expired - Lifetime EP0806252B1 (en) | 1996-05-08 | 1997-04-17 | Method for operating an arrangement of roll stands |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5901597A (en) |
| EP (1) | EP0806252B1 (en) |
| JP (1) | JP3996233B2 (en) |
| CN (1) | CN1082850C (en) |
| AT (1) | ATE187906T1 (en) |
| DE (2) | DE19618437A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19747656A1 (en) * | 1997-10-29 | 1999-05-12 | Schloemann Siemag Ag | Rolling system for rolling all types of finished profiles |
| ITMI20021594A1 (en) * | 2002-07-19 | 2004-01-19 | Danieli Off Mecc | METHOD AND SYSTEM FOR HOT ROLLING OF RAILS |
| EP3300809A1 (en) * | 2016-09-28 | 2018-04-04 | Primetals Technologies France SAS | Facility and method for levelling a metal product |
| CN112974519B (en) * | 2021-03-31 | 2024-06-14 | 武钢集团昆明钢铁股份有限公司 | Economical welding endless rolled bar production line process arrangement and production method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4337555A1 (en) * | 1993-11-04 | 1995-05-11 | Schloemann Siemag Ag | Method for rolling finished profiles from a preliminary profile by means of a roll stand arrangement working in reversing operation |
| US5664452A (en) * | 1909-11-04 | 1997-09-09 | Sms Schloemann-Siemag Aktiengesellschaft | Method of rolling finished sections from a preliminary section in a reversing rolling stand arrangement |
| JPS56109101A (en) * | 1980-01-31 | 1981-08-29 | Ishikawajima Harima Heavy Ind Co Ltd | Rolling apparatus |
| US4550582A (en) * | 1980-02-04 | 1985-11-05 | Kawasaki Steel Corporation | Method of producing steel H-sheet pile |
| FR2543027B1 (en) * | 1983-03-21 | 1986-05-16 | Sacilor | PROCESS OF INTEGRAL UNIVERSAL LAMINATION OF METAL PROFILES OF THE POUTRELLE H OR I TYPE |
| DE3730471A1 (en) * | 1987-09-11 | 1989-03-23 | Schloemann Siemag Ag | COMPACT ROLLING MILL AND WORKING METHOD FOR ROLLING MOLDED STEEL |
-
1996
- 1996-05-08 DE DE19618437A patent/DE19618437A1/en not_active Withdrawn
-
1997
- 1997-04-17 EP EP97106345A patent/EP0806252B1/en not_active Expired - Lifetime
- 1997-04-17 DE DE59700873T patent/DE59700873D1/en not_active Expired - Lifetime
- 1997-04-17 AT AT97106345T patent/ATE187906T1/en active
- 1997-05-01 JP JP11398197A patent/JP3996233B2/en not_active Expired - Fee Related
- 1997-05-07 US US08/852,216 patent/US5901597A/en not_active Expired - Lifetime
- 1997-05-08 CN CN97110800A patent/CN1082850C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5901597A (en) | 1999-05-11 |
| DE59700873D1 (en) | 2000-01-27 |
| JPH1052702A (en) | 1998-02-24 |
| CN1082850C (en) | 2002-04-17 |
| DE19618437A1 (en) | 1997-11-13 |
| CN1168820A (en) | 1997-12-31 |
| EP0806252A1 (en) | 1997-11-12 |
| JP3996233B2 (en) | 2007-10-24 |
| ATE187906T1 (en) | 2000-01-15 |
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