EP0919334B1 - Method for adjusting the blasting image and impeller wheel suitable for carrying out the method - Google Patents
Method for adjusting the blasting image and impeller wheel suitable for carrying out the method Download PDFInfo
- Publication number
- EP0919334B1 EP0919334B1 EP98122333A EP98122333A EP0919334B1 EP 0919334 B1 EP0919334 B1 EP 0919334B1 EP 98122333 A EP98122333 A EP 98122333A EP 98122333 A EP98122333 A EP 98122333A EP 0919334 B1 EP0919334 B1 EP 0919334B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide sleeve
- wear
- centrifugal wheel
- jet
- sensor
- 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
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/06—Impeller wheels; Rotor blades therefor
- B24C5/068—Transferring the abrasive particles from the feeding means onto the propeller blades, e.g. using central impellers
Definitions
- the invention relates to a method for beam image adjustment in centrifugal blasting systems, each with a centrifugal wheel with throwing blades arranged radially thereon Distributor wheel arranged coaxially to the centrifugal wheel and an equally coaxial to this beam guide sleeve have, in which the direction of the processing beam controlled by adjusting a window of the beam guide sleeve is, this in the area of a control edge of the Window, especially due to contact with blasting media, worn and to adjust according to the wear is.
- the invention further relates to an implementation suitable centrifugal wheel arrangement.
- a centrifugal blasting system is known from DE 44 10 628, where a window or slot-like guide sleeve opening rubbed off by the flowing and flying abrasive and is worn out. This wear will appear in the first Line observed in the direction of rotation. Position and size of the Guide sleeve openings determine the beam angle of the blasting medium, so that the wear, which leads to a removal of the Edge material leads, the control edge also shifts. The Cleaning performance deteriorates and the guide sleeve must be replaced. In addition, the spray pattern shifts in undesirable, which forces work to be interrupted.
- shot peening devices can thus be continuously adjusted.
- An adjustment of the Beam guide is relatively easy because the part does not rotate with the centrifugal wheel itself.
- Beam guide sleeve can be adjusted so that the removal the control edge is compensated.
- the signals can be transmitted through an external or internal sensor be delivered.
- An external sensor can, for example a directed towards the control edge area, if necessary scanning laser beam. When the beam is removed the edge is not thrown back, there is a corresponding Signal.
- the signals are preferred by means of a directly connected to the beam guide sleeve Sensor generated.
- a centrifugal wheel arrangement suitable for carrying out the method, where the centrifugal wheel in the area of Window due to a certain abrasive content a control edge wears, is designed so that the Beam guide sleeve in the area of the control edge at least one Contains sensor, especially contact wire, built-in is connected to a signal converter.
- sensor especially contact wire, built-in is connected to a signal converter.
- Disconnecting a contact wire is one of adjusting the angle the beam guide sleeve can be triggered.
- the beam guide sleeve is preferably designed such that several contact wires are inserted in the finest holes.
- One containing this contact wire or the like End piece can preferably be interchangeable with the rest Guide sleeve to be connected.
- centrifugal blasting system emerge, each with a centrifugal wheel with this radially arranged throwing blades 11.1, ... 1.n, a coaxial to this spinner arranged distribution wheel and one as well Has beam guide sleeve 1 arranged coaxially to this.
- the centrifugal jet 15 passes along a control edge 5 the beam guide sleeve 1 on the front of the throwing blade 11 and is considerably accelerated by centrifugal force, so that subsequently the single particle of the abrasive strikes a surface 16 with high energy.
- the control edge 5 of the beam guide sleeve 1 comes important role because of the position and size of the guide sleeve opening exactly determines the beam angle of the blasting medium. It is observed that the control edge is worn 5 is removed and finally another position, designated 5 'in Fig. 5, gets. The cleaning performance and the accuracy of the beam pattern deteriorate essential.
- a signaling sensor 3 installed, here in Form of thin contact wires 8.1, ..., 8.n, in fine holes 7.1, ..., 7.n are inserted.
- the contact wires are energized and each in a scanning circuit, for example Bridge circuit, installed. If the wear limit the control edge 5 to 5 ', the Fine holes of the first front reached and the contact wires exposed and severed after a short time.
- the electronic control circuit transforms 20, which receives the signal, this into a step signal, which acts on a stepper motor 18 and the Beam guide sleeve for turning against the respective wear direction brings, so that finally the control edge 5 'comes to lie in the amount of the original control edge 5. This will make the progressive wear, at least to a certain extent, compensated without the beam guide sleeve 1 must be replaced prematurely.
- the material of the beam guide sleeve is, for example, high-strength Sintered metal or a high strength alloy, if necessary also ceramic material. It is also possible the area of the edge designed with wire holes as Interchangeable part 25 to design, so that when worn material-saving replacement is possible here.
- An alternative to those connected to the beam guide sleeve Sensors consists of a scanning laser beam from one on a fixed part of the centrifugal wheel system fixed laser source on the control edge and their progressive removal via optical converters watch (not shown).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Laser Beam Processing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Strahlbildnachstellung bei Schleuderstrahlanlagen, die jeweils ein Schleuderrad mit radial an diesem angeordneten Wurfschaufeln, ein koaxial zu dem Schleuderrad angeordnetes Verteilerrad und eine ebenso koaxial zu diesem angeordnete Strahlleithülse aufweisen, bei dem die Richtung des bearbeitenden Strahles durch Verstellung eines Fensters der Strahlleithülse gesteuert wird, wobei diese im Bereich einer Steuerkante des Fensters, insbesondere aufgrund eines Strahlmittelkontaktes, verschleißt und entsprechend dem Verschleiß nachzustellen ist. Die Erfindung betrifft weiterhin eine zur Durchführung des Verfahrens geeignete Schleuderradanordnung.The invention relates to a method for beam image adjustment in centrifugal blasting systems, each with a centrifugal wheel with throwing blades arranged radially thereon Distributor wheel arranged coaxially to the centrifugal wheel and an equally coaxial to this beam guide sleeve have, in which the direction of the processing beam controlled by adjusting a window of the beam guide sleeve is, this in the area of a control edge of the Window, especially due to contact with blasting media, worn and to adjust according to the wear is. The invention further relates to an implementation suitable centrifugal wheel arrangement.
Aus der DE 44 10 628 ist eine Schleuderstrahlanlage bekannt, bei der eine fenster- oder schlitzartige Leithülsenöffnung durch das fließende und fliegende Strahlmittel abgerieben und verschlissen wird. Dieser Verschleiß wird in erster Linie in Drehrichtung beobachtet. Stellung und Größe der Leithülsenöffnung bestimmen den Abstrahlwinkel des Strahlmittels, so daß der Verschleiß, der zu einem Abtragen des Kantenmaterials führt, auch die Steuerkante verschiebt. Die Putzleistung verschlechtert sich und die Leithülse muß ersetzt werden. Außerdem verschiebt sich das Strahlbild in unerwünschter Weise, was zur Arbeitsunterbrechung zwingt. A centrifugal blasting system is known from DE 44 10 628, where a window or slot-like guide sleeve opening rubbed off by the flowing and flying abrasive and is worn out. This wear will appear in the first Line observed in the direction of rotation. Position and size of the Guide sleeve openings determine the beam angle of the blasting medium, so that the wear, which leads to a removal of the Edge material leads, the control edge also shifts. The Cleaning performance deteriorates and the guide sleeve must be replaced. In addition, the spray pattern shifts in undesirable, which forces work to be interrupted.
Zwar kann durch manuelles Zurückstellen der Strahlleithülse eine Verbesserung des Strahlbildes eingeleitet werden. Jedoch erfordert dies jeweils eine genaue Zentrierung und Neu-Justierung der Strahlleithülse sowie eine Arbeitsunterbrechung.You can do this by manually resetting the beam guide sleeve an improvement of the spray pattern can be initiated. However, this requires precise centering and Readjustment of the beam guide sleeve and an interruption in work.
Aus dem Dokument JP 09 001459 A ist eine Schleuderstrahlanlage mit einer Strahlbildnachstellvorrichtung bekannt, bei welcher das Strahlbild entsprechend der Breite der zu polierenden Fläche nachgestellt wird.From document JP 09 001459 A is a centrifugal blasting system with a Beam image adjustment device known, in which the beam image according to the width the surface to be polished is adjusted.
Es stellt sich damit die Aufgabe, ein Verfahren und eine Schleuderradanordnung anzugeben, bei der kontinuierlich die Genauigkeit der Stellung der Steuerkante auch unter Verschleißbedingungen nach- und einstellbar ist, so daß insbesondere die Standzeit und die Intervalle zwischen den Auswechselungen der Leithülse vergrößert werden können.So there is the task of a procedure and a Specify centrifugal wheel arrangement in which the Accuracy of the control edge position even under wear conditions is adjustable and adjustable, so that in particular the service life and the intervals between the replacements the guide sleeve can be enlarged.
Diese Aufgabe wird gelöst durch ein Verfahren der eingangs genannten Art, das dadurch gekennzeichnet ist, daß der Verschleiß und die Verschleißrichtung der Strahlleithülse mittels eines signalgebenden Fühlers abgefühlt und ermittelt werden, entsprechende Signale einem elektronischen Steuerkreis zugeführt werden und die Strahlleithülse während des Betriebs der Schleuderstrahlanlage in Gegenrichtung zur jeweiligen Verschlußrichtung ihres Fensters verdreht wird, wobei der fortschreitende Verschleiß kompensiert wird.This problem is solved by a method of the beginning mentioned type, which is characterized in that the wear and the direction of wear of the beam guide sleeve of a signaling sensor is sensed and determined corresponding signals to an electronic control circuit are supplied and the beam guide sleeve during the Operation of the centrifugal jet system in the opposite direction the respective closing direction of your window is rotated, the progressive wear is compensated.
Hierbei ergibt sich insbesondere der Vorteil, daß eine kontinuierliche Justierung des Strahls und damit des Strahlbildes möglich ist. Insbesondere Kugelstrahl-Vorrichtungen können somit kontinuierlich justiert werden. Eine Verstellung der Strahlleithülse ist relativ einfach möglich, da das Teil nicht mit dem Schleuderrad selbst rotiert. Beispielsweise mit Hilfe eines Servomotors oder eines Schrittschaltgetriebes kann entsprechend einer vorgegebenen Signalfolge die Strahlleithülse soweit verstellt werden, daß die Abtragung der Steuerkante kompensiert ist.This has the particular advantage that a continuous Adjustment of the beam and thus the beam pattern is possible. In particular, shot peening devices can thus be continuously adjusted. An adjustment of the Beam guide is relatively easy because the part does not rotate with the centrifugal wheel itself. For example with the help of a servo motor or a stepping gear can the according to a predetermined signal sequence Beam guide sleeve can be adjusted so that the removal the control edge is compensated.
Die Signale können durch einen externen oder internen Fühler abgegeben werden. Ein externer Fühler kann beispielsweise ein auf den Steuerkantenbereich gerichteter, gegebenenfalls scannender Laserstrahl sein. Wenn der Strahl bei Abtragung der Kante nicht zurückgeworfen wird, kommt es zu einem entsprechenden Signal. Vorzugsweise werden jedoch die Signale mittels eines mit der Strahlleithülse direkt verbundenen Fühlers erzeugt.The signals can be transmitted through an external or internal sensor be delivered. An external sensor can, for example a directed towards the control edge area, if necessary scanning laser beam. When the beam is removed the edge is not thrown back, there is a corresponding Signal. However, the signals are preferred by means of a directly connected to the beam guide sleeve Sensor generated.
Eine zur Durchführung des Verfahrens geeignete Schleuderradanordnung, bei der das Schleuderrad im Bereich des Fensters aufgrund eines gewissen Strahlmittelanteils an einer Steuerkante verschleißt, ist so gestaltet, daß die Strahlleithülse im Bereich der Steuerkante wenigstens einen Sensor, insbesondere Kontaktdraht, eingebaut enthält, der mit einem Signalwandler verbunden ist. Bei durch Verschleiß verursachten Ansprechen des Sensors, beispielsweise durch Trennen eines Kontaktdrahtes, ist eines Winkelverstellung der Strahlleithülse auslösbar.A centrifugal wheel arrangement suitable for carrying out the method, where the centrifugal wheel in the area of Window due to a certain abrasive content a control edge wears, is designed so that the Beam guide sleeve in the area of the control edge at least one Contains sensor, especially contact wire, built-in is connected to a signal converter. In case of wear response caused by the sensor, for example by Disconnecting a contact wire is one of adjusting the angle the beam guide sleeve can be triggered.
Vorzugsweise wird die Strahlleithülse so ausgestaltet, daß mehrere Kontaktdrähte in feinste Bohrungen eingelegt sind. Ein dieses Kontaktdrähte oder dergleichen enthaltendes Endstück kann vorzugsweise auswechselbar mit der übrigen Leithülse verbunden sein.The beam guide sleeve is preferably designed such that several contact wires are inserted in the finest holes. One containing this contact wire or the like End piece can preferably be interchangeable with the rest Guide sleeve to be connected.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt. Die Figuren der Zeichnung zeigen im einzelnen:
- Fig. 1
- in schematisierter, perspektivischer Ansicht ein Schleuderrad mit einer zu bestrahlenden Werkstückoberfläche;
- Figuren und 2b
- in Seitenansicht und im Querschnitt eine 2a Strahlleithülse;
- Fig. 3
- im Detail eine Sensoranordnung im Bereich der Steuerkante;
- Figuren
- in schematischer Darstellung einen
- 4 und 5
- Verteiler einer Strahlleithülse und eine Wurfschaufel bei richtiger und falscher Stellung der Steuerkante der Strahlleithülse.
- Fig. 1
- in a schematic, perspective view, a centrifugal wheel with a workpiece surface to be irradiated;
- Figures and 2b
- in side view and in cross section a 2a beam guide sleeve;
- Fig. 3
- in detail a sensor arrangement in the area of the control edge;
- characters
- in a schematic representation
- 4 and 5
- Distributor of a beam guide sleeve and a throwing shovel when the control edge of the beam guide sleeve is positioned correctly and incorrectly.
Aus den Fig. 1 sowie 4 und 5 geht eine Schleuderstrahlanlage
hervor, die jeweils ein Schleuderrad mit radial an diesem
angeordneten Wurfschaufeln 11.1,... 1.n, ein koaxial zu
diesem Schleuderrad angeordnetes Verteilerrad und eine ebenso
koaxial zu diesem angeordnete Strahlleithülse 1 aufweist.
Der Schleuderstrahl 15 gelangt entlang einer Steuerkante 5
der Strahlleithülse 1 auf die Vorderseite der Wurfschaufel
11 und wird durch Zentrifugalkraft erheblich beschleunigt,
so daß anschließend das einzelne Partikel des Strahlmittels
mit hoher Energie auf eine Oberfläche 16 auftrifft.1 and 4 and 5 is a centrifugal blasting system
emerge, each with a centrifugal wheel with this radially
arranged throwing blades 11.1, ... 1.n, a coaxial to
this spinner arranged distribution wheel and one as well
Has
Dabei kommt der Steuerkante 5 der Strahlleithülse 1 eine
wichtige Rolle zu, da die Stellung und Größe der Leithülsenöffnung
den Abstrahlwinkel des Strahlmittels exakt bestimmt.
Es wird beobachtet, daß durch Verschleiß die Steuerkante
5 abgetragen wird und schließlich eine andere Stellung,
bezeichnet mit 5' in Fig. 5, bekommt. Die Putzleistung
und die Exaktheit des Strahlbildes verschlechtern sich
wesentlich.The
Um festzustellen, in welchem Grad der Verschleiß und die
Verschleißrichtung der Strahlleithülse sich fortgesetzt
haben, wird gemäß Fig. 2a, 2b und 3 in den Bereich der Steuerkante
5 ein signalgebender Sensor 3 eingebaut, hier in
Form von dünnen Kontaktdrähten 8.1,...,8.n, die in Feinstbohrungen
7.1,...,7.n eingelegt sind. Die Kontaktdrähte sind
unter Strom gesetzt und jeweils in einen Abtastkreis, beispielsweise
Brückenkreis, eingebaut. Wenn die Verschleißgrenze
der Steuerkante 5 bis 5' vorwandert, werden die
Feinstbohrungen der ersten Front erreicht und die Kontaktdrähte
freigelegt und nach kurzer Zeit durchtrennt. To determine the degree of wear and the
Direction of wear of the beam guide sleeve continued
2a, 2b and 3 in the area of the control edge
5 a
Nach dem Durchtrennen verwandelt der elektronische Steuerkreis
20, der das Signal aufnimmt, dieses in ein Schrittsignal,
das einen Schrittschaltmotor 18 beaufschlagt und die
Strahlleithülse zum Drehen entgegen der jeweiligen Verschleißrichtung
bringt, so daß schließlich die Steuerkante
5' in Höhe der ursprünglichen Steuerkante 5 zu liegen kommt.
Hierdurch wird der fortschreitende Verschleiß, jedenfalls
bis zu einem gewissen Grad, kompensiert, ohne daß die Strahlleithülse
1 vorzeitig ausgewechselt werden muß.After cutting, the electronic control circuit transforms
20, which receives the signal, this into a step signal,
which acts on a
Anstelle der feinen Drähte 8 können auch andere Sensoren, beispielsweise Lichtleitfasern oder dergleichen, eingesetzt werden, die eine entsprechende Abfühlung des Erreichens der verschleißenden Steuerkante 5' anzeigen. Erst wenn die letzte Front der Sensoren 8 erreicht ist, ist eine Verschleißgrenze soweit fortgeschritten, daß eine neue Leithülse eingebaut werden muß.Instead of the fine wires 8, other sensors, for example optical fibers or the like be a corresponding sensation of reaching the display wearing control edge 5 '. Only when that last front of the sensors 8 is reached, is a wear limit so far advanced that a new guide sleeve must be installed.
Das Material der Strahlleithülse ist beispielsweise hochfestes
Sintermetall oder eine hochfeste Legierung, gegebenenfalls
auch Keramik-Material. Darüberhinaus ist möglich,
den Bereich der mit Drahtbohrungen ausgestalteten Kante als
auswechselbares Teil 25 zu gestalten, so daß beim Verschleiß
hier ein materialsparendes Auswechseln möglich ist.The material of the beam guide sleeve is, for example, high-strength
Sintered metal or a high strength alloy, if necessary
also ceramic material. It is also possible
the area of the edge designed with wire holes as
Eine Alternative zu den mit der Strahlleithülse verbundenen Sensoren besteht darin, einen scannenden Laserstrahl von einer an einem feststehenden Teil der Schleuderradanlage festigten Laserquelle auf die Steuerkante zu richten und deren fortschreitendes Abtragen über optische Wandler zu beobachten (nicht dargestellt).An alternative to those connected to the beam guide sleeve Sensors consists of a scanning laser beam from one on a fixed part of the centrifugal wheel system fixed laser source on the control edge and their progressive removal via optical converters watch (not shown).
Insgesamt ergeben sich damit Möglichkeiten, Standzeiten und Intervallzeiten für Verschleißreparaturen wesentlich zu vergrößern. Ein weiterer Vorteil ist, daß der Zeitpunkt zum Auswechseln der Strahlleithülse anzeigbar ist und eine exakte Ausrichtung des Strahlbildes gewährleistet ist.Overall, there are possibilities, downtimes and Interval times for wear repairs increase significantly enlarge. Another advantage is that the time at Replacing the beam guide sleeve is indicated and a exact alignment of the spray pattern is guaranteed.
Claims (10)
- A method of adjusting the jet configuration in centrifugal blast cleaners comprising a centrifugal wheel (10) with radially mounted impeller blades (11.1, ..., 11.n), a distributor wheel (12) disposed coaxially with the centrifugal wheel (10), and a jet guide sleeve (1) likewise coaxial therewith, wherein the direction of the operating jet (15) is controlled by adjusting a window (2) in the jet guide sleeve (1), wherein the sleeve becomes worn at a control edge (5, 5') of the window and has to be readjusted in accordance with the wear,
characterised in thatthe wear and the direction of the wear on the jet guide sleeve (1) is sensed and determined by a signal-transmitting sensor (3),corresponding signals are delivered to an electronic control circuit (20), andduring operation of the centrifugal blast cleaner the jet guide sleeve (1) is continuously rotated in the opposite direction to the wear on the window (2), thus compensating the progressive wear. - A method according to claim 1, characterised in that the signals are generated electrically, electromagnetically or optically, preferably by a sensor (8) connected to the jet guide sleeve (1).
- A centrifugal wheel arrangement for surface treatment of objects, comprising a centrifugal wheel (10) comprising a number of impeller blades (11.1, ..., 11.n) radially mounted on it, a distributor wheel (12) disposed coaxially with the centrifugal wheel, and an adjustable jet guide sleeve (1) likewise coaxial therewith, by means of which the direction of the operating beam (15) is controlled by adjusting a window (2) in the jet guide sleeve (1), characterised in thatthe arrangement is connected to an external or internal sensor (3) for detecting the wear and the direction of wear on the window (2) of the beam jet sleeve (1), and the sensor (3) is connected to an electronic control device (20) andwhen the sensor (3) responds as a result of wear, an angular adjustment of the jet guide sleeve (1) can be triggered by an actuator.
- A centrifugal wheel arrangement according to claim 3, characterised in that the jet guide sleeve (1) contains at least one sensor element installed at a control edge (5, 5') thereof.
- A centrifugal wheel arrangement according to claim 4, characterised in that at least one sensor element is a contact wire (8.1, ..., 8.n).
- A centrifugal wheel arrangement according to claim 4, characterised in that at least one sensor element is an optical fibre.
- A centrifugal wheel arrangement according to any of claims 3 to 6, characterised in that a number of contact wires (8.1, ..., 8.n) or optical fibres are inserted in very fine bores (7.1, ..., 7.n).
- A centrifugal wheel arrangement according to any of the preceding claims, characterised in that the jet guide sleeve (1) is rotatable by an adjusting servomotor (18) or adjusting drive.
- A centrifugal wheel arrangement according to any of the preceding claims, characterised in that the part (25) of the jet guide sleeve (1) containing the sensor elements is separately interchangeable.
- A centrifugal wheel arrangement according to any of the preceding claims, characterised in that the sensor (3) is a laser jet scanning unit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19752549A DE19752549C1 (en) | 1997-11-27 | 1997-11-27 | Centrifugal particle blast wheel for surface treatment |
| DE19752549 | 1997-11-27 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0919334A2 EP0919334A2 (en) | 1999-06-02 |
| EP0919334A3 EP0919334A3 (en) | 2000-10-25 |
| EP0919334B1 true EP0919334B1 (en) | 2003-02-26 |
Family
ID=7849967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98122333A Expired - Lifetime EP0919334B1 (en) | 1997-11-27 | 1998-11-25 | Method for adjusting the blasting image and impeller wheel suitable for carrying out the method |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0919334B1 (en) |
| DE (2) | DE19752549C1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10104703C1 (en) * | 2001-02-02 | 2001-12-06 | Schlick Jennifer | Material acceleration device for workpiece surface treatment has material jet sleeve and concentric jet limitation sleeve rotated for aligning respective openings and defining treatment jet angle |
| DE10216819A1 (en) * | 2002-04-16 | 2003-11-06 | Roesler Oberflaechentechnik Gm | adjusting |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3368308A (en) * | 1964-11-03 | 1968-02-13 | Pangborn Corp | Centrifugal blasting apparatus |
| DE4410628C2 (en) * | 1994-03-26 | 1996-09-19 | Schlick Roto Jet Masch | Centrifugal wheel with fixed centrifugal wheel blades |
| JP3322378B2 (en) * | 1995-02-03 | 2002-09-09 | 新東工業株式会社 | Abrasive centrifugal projector |
| JPH091459A (en) * | 1995-06-16 | 1997-01-07 | Sintokogio Ltd | Descaling method for steel plate and device therefor |
-
1997
- 1997-11-27 DE DE19752549A patent/DE19752549C1/en not_active Expired - Lifetime
-
1998
- 1998-11-25 EP EP98122333A patent/EP0919334B1/en not_active Expired - Lifetime
- 1998-11-25 DE DE59807299T patent/DE59807299D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59807299D1 (en) | 2003-04-03 |
| EP0919334A2 (en) | 1999-06-02 |
| EP0919334A3 (en) | 2000-10-25 |
| DE19752549C1 (en) | 1999-04-08 |
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