EP0099939B1 - Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions - Google Patents
Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions Download PDFInfo
- Publication number
- EP0099939B1 EP0099939B1 EP19820106823 EP82106823A EP0099939B1 EP 0099939 B1 EP0099939 B1 EP 0099939B1 EP 19820106823 EP19820106823 EP 19820106823 EP 82106823 A EP82106823 A EP 82106823A EP 0099939 B1 EP0099939 B1 EP 0099939B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- drum
- slats
- workpieces
- machine according
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
- B24C3/26—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by barrel cages, i.e. tumblers; Gimbal mountings therefor
- B24C3/266—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by barrel cages, i.e. tumblers; Gimbal mountings therefor for continuously travelling workpieces
Definitions
- the invention relates to a drum blasting machine for blasting treatment of workpieces of the same or different sizes, in which the workpieces are introduced into an end opening of a drum comprising a drum casing and support rings and rotatably mounted on support rollers, transported through the drum interior at an adjustable speed, rotated tilting and blasted and then brought out of the other front opening of the drum.
- the blasting devices are arranged on one or both front openings or are designed to be retractable into these openings.
- the transport of the workpieces is effected either by the drum having an axis of rotation which is inclined downwards to the horizontal, or by helical transport strips (EP-A-0 003 225) being arranged inside the drum.
- the throughput of the workpieces is regulated either by metering them before they are introduced into the drum or by changing their speed.
- the main disadvantage of this form of training is that the jet devices (centrifugal wheels) can only be arranged at the two front openings of the drum. This not only limits the number of facilities; Depending on the length of the drum, there are also unfavorable beam areas and difficulties in closing off the openings to the outside. Depending on the type and diameter of the drum, the jet device also hinders the free passage cross-section for the eintial. workpieces to be brought out.
- the invention has for its object to improve the generic form of drum blasting machines so that the workpieces axially conveyed through the drum with the blasting medium from the outside is possible approximately radially to the drum shell; it is based on a known design belonging to another type of drum blasting machine (DE-C-664 971), in which the material to be blasted is viewed from the side, i.e. the circumference is loaded with the material in the radial direction and is also discharged radially laterally downwards, and in the case of which closed side disks delimiting the end face of the drum are articulated louvre slats which form the drum wall.
- DE-C-664 971 another type of drum blasting machine
- the lamellae can be displaceable parallel to the drum axis in and against the transport direction of the workpieces during the rotation of the drum, the size of the displacement path of the lamellae being changeable.
- the link bearings of the lamellar edges in the support rings can, as the invention finally provides, be designed as tilting movements that permit angular movement to the pivot axis, and one of the support rings carrying the support rings has an axially displaceable bearing which is acted upon by a stepless servomotor.
- the lamellae 9 are articulated on the support rings 8 by means of the axle bolts 10 (cf. also FIG. 2) with a longitudinal edge 9a inwardly pivotable. They lie (cf. the lower area of the support rings 8) with the other free longitudinal edge 9b on the articulated one Long edge 9a of the respective adjacent lamella 9.
- adjacent lamellae 9 due to the force of gravity pivoted inward downward, form a gap opening O above which a blast wheel blasting device 1 is arranged on the machine housing 2.
- This centrifugal wheel blasting device can be displaced (see FIG. 3) in a manner not shown in directions indicated by the arrow P above the gap opening ⁇ .
- the drum formed in this way by the slats 9 rests on the lower pairs of support rollers 5, 7 with the axes 27, 21 and is further guided by an upper guide roller 6.
- the drum is driven by means of the lifting pawls 12, which underlie the (axle) bolts 10 of the slats 9 and are moved up and down by means of a swivel arm 13 by means of the crank rod 14, which in turn is connected to the motor 15 designed here as an electric motor.
- the motor 15 is arranged on a swivel bracket 20, which is held in the working position by a load limiting sensor 16 and, if an overload occurs, causes the lifting pawl to disengage.
- a pawl 11 also resting on the (axle) bolt 10 prevents the support rings 8 from rotating back.
- the workpieces W are introduced in the direction indicated by the arrow R (see FIG. 3) by means of a feed channel 3a into the drum formed from the lamellae 9 and conveyed further within the drum in that the lamellae 9 parallel to the drum axis of rotation during the drum revolutions in the transport direction of the workpieces W and against this direction by a preset distance.
- This is, as can be seen from Fig. 2, achieved in that the pair of idlers 7 are moved together with its axis 21 via a slide ring 17 and an adjusting link 18 parallel to the drum axis.
- the displacement causes a change in the angle of inclination of the support rings 8 to the axis of rotation of the drum and thus the displacement of the lamellae 9 in and against the transport direction of the workpieces W during one revolution and thus to a helical transport movement of the workpieces W resting on the lamellae 9 in the lower region of the drum.
- the pivot bearings of the slats 9 on the support rings 8 are designed so that they allow the angular tilting movements of the support rings 8, here in such a way that the bearing surfaces for the (axis) bolts 10 are spherical in the support ring.
- the passage speed can be changed while the drum rotation speed remains the same.
- the free ends 9c of the slats 9 emerge during the circulation in the upper region additionally by a stationary protrusion with the machine housing 2 in the front opening of the drum formed by the slats 9 connected guide curve 19 guided so that the gap opening O forming in the upper region closes as soon as it has left the blasting area of the centrifugal wheel blasting device 1.
- a known collecting channel 23 for the used abrasive and the other impurities (sand) is arranged below the machine housing. After processing, the blasting medium is fed back to the centrifugal wheel blasting device in a known manner through the blasting medium circuit 4.
- the feed can be interrupted in a manner not shown for the period in which a lamella 9 moves through the blasting area of the centrifugal wheel blasting device 1.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Die Erfindung bezieht sich auf eine Trommelstrahlmaschine zur Strahlbehandlung gleich- oder unterschiedlich großer Werkstücke, bei der die Werkstücke in eine stirnseitige Öffnung einer einen Trommelmantel und Tragringe umfassenden, auf Tragrollen drehbar lagernden Trommel eingebracht, mit einstellbarer Geschwindigkeit durch das Trommelinnere transportiert, dabei kippend gedreht und gestrahlt und anschließend aus der anderen stirnseitigen Öffnung der Trommel herausgebracht werden.The invention relates to a drum blasting machine for blasting treatment of workpieces of the same or different sizes, in which the workpieces are introduced into an end opening of a drum comprising a drum casing and support rings and rotatably mounted on support rollers, transported through the drum interior at an adjustable speed, rotated tilting and blasted and then brought out of the other front opening of the drum.
Bei Trommelstrahlmaschinen dieser Art (DE-C-109 648) sind die Strahleinrichtungen (Schleuderräder) an einer oder an beiden stirnseitigen Öffnungen angeordnet bzw. in diese Öffnungen einfahrbar ausgebildet. Der Transport der Werkstücke wird entweder dadurch bewirkt, daß die Trommel eine zur Horizontalen nach unten geneigte Drehachse aufweist oder daß im Trommelinneren schraubenförmig angeordnete Transportleisten (EP-A-0 003 225) angeordnet sind. Die Durchsatzmenge der Werkstücke wird entweder durch deren Dosierung vor dem Einbringen in die Trommel oder durch deren Drehzahländerung geregelt.In drum blasting machines of this type (DE-C-109 648), the blasting devices (centrifugal wheels) are arranged on one or both front openings or are designed to be retractable into these openings. The transport of the workpieces is effected either by the drum having an axis of rotation which is inclined downwards to the horizontal, or by helical transport strips (EP-A-0 003 225) being arranged inside the drum. The throughput of the workpieces is regulated either by metering them before they are introduced into the drum or by changing their speed.
Der wesentliche Nachteil dieser Ausbildungsform besteht darin, daß die Strahleinrichtungen (Schleuderräder) nur an den beiden stirnseitigen Öffnungen der Trommel angeordnet werden können. Dadurch ist nicht nur die Anzahl der Einrichtungen begrenzt; es ergeben sich auch je nach Länge der Trommel ungünstige Strahlbereiche und Schwierigkeiten beim Abschluß der Öffnungen nach außen. Je nach Bauart und Durchmesser der Trommel behindert die Strahleinrichtung auch den freien Durchgangsquerschnitt für die einbzw. auszubringenden Werkstücke.The main disadvantage of this form of training is that the jet devices (centrifugal wheels) can only be arranged at the two front openings of the drum. This not only limits the number of facilities; Depending on the length of the drum, there are also unfavorable beam areas and difficulties in closing off the openings to the outside. Depending on the type and diameter of the drum, the jet device also hinders the free passage cross-section for the einbzw. workpieces to be brought out.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Ausbildungsform von Trommelstrahlmaschinen so zu verbessern, daß eine Beaufschlagung der axial durch die Trommel hindurch beförderten Werkstücke mit dem Strahlmittel von außen her etwa radial zum Trommelmantel möglich ist; sie geht dabei von einer zu einer anderen Gattung von Trommelstrahlmaschinen gehörenden bekannten Ausbildung (DE-C-664 971) aus, bei der das zu strahlende Gut von der Seite, d.h. vom Umfang her in radialer Richtung mit dem Gut beladen und ebenfalls radial seitlich nach unten entladen wird, und bei der an die Trommel stirnseitig begrenzende geschlossene Seitenscheiben Jalousie-Lamellen angelenkt sind, die die Trommelwand bilden. Diese Jalousie-Lamellen können bei der bekannten Ausbildung zur Bildung von Öffnungen für den Strahlmittelstrahl und für das Ein- und Ausbringen des Gutes ausgeschwenkt werden, wobei das Ausschwenken im oberen Umlaufbereich der Trommel durch außerhalb der Trommel angeordnete Führungen bewirkt wird, und die Jalousie-Lamellen im unteren Umlaufbereich der Trommel von, um ortsfeste Achsen schwenkbaren Segmenthebeln unterfaßt und gehalten werden. Die obengenannte Aufgabe wird dabei mit Bezug auf die gattungsgemäße Ausbildungsform von Trommelstrahlmaschinen dadurch gelöst, daß der Trommelmantel aus solchen Jalousie-Lamellen gebildet wird, wobei diese mit einer Längskante an der Innenkante der Tragringe angelenkt sind und mit ihrer anderen freien Längskante auf der angelenkten Längskante der benachbarten Lamelle aufliegen.The invention has for its object to improve the generic form of drum blasting machines so that the workpieces axially conveyed through the drum with the blasting medium from the outside is possible approximately radially to the drum shell; it is based on a known design belonging to another type of drum blasting machine (DE-C-664 971), in which the material to be blasted is viewed from the side, i.e. the circumference is loaded with the material in the radial direction and is also discharged radially laterally downwards, and in the case of which closed side disks delimiting the end face of the drum are articulated louvre slats which form the drum wall. In the known design for the formation of openings for the blasting agent jet and for the introduction and removal of the material, these blind slats can be swung out, the swiveling out in the upper peripheral region of the drum being effected by guides arranged outside the drum, and the blind slats in the lower circumferential area of the drum are gripped and held by segment levers which can be pivoted about fixed axes. The above object is achieved with reference to the generic form of drum blasting machines in that the drum shell is formed from such blind slats, which are articulated with a longitudinal edge on the inner edge of the support rings and with their other free longitudinal edge on the articulated longitudinal edge of the rest adjacent slats.
Durch diese Lösung wird erreicht, daß der für den Axialtransport der Werkstücke notwendige, durchgehende Zylinderinnenraum der Trommel beibehalten wird und weder stirnseitige Tragscheiben noch schwenkbare Segmenthebel zur stützenden Unterfassung der Jalousie-Lamellen benötigt werden.This solution ensures that the continuous cylinder interior of the drum, which is necessary for the axial transport of the workpieces, is maintained and that neither end-side support disks nor pivotable segment levers are required to support the blind slats.
Werden, wie die Erfindung weiter vorsieht, die außerhalb der Trommel ortsfest angeordneten Führungen für die Lamellen während deren Durchlauf durch den oberen Abschnitt der Umlaufbahn des Trommelmantels in den Innenraum der Trommel ragend, in Form von Leitkurvenleisten ausgebildet, die die freien Stirnkanten der Lamellen erfassen und halten, dann befinden sich diese außerhalb des Strahlbereichs der Strahleinrichtungen und behindern den Durchgang der Werkstücke durch die stirnseitigen Öffnungen der Trommel praktisch nicht. Die Lamellen können während des Umlaufs der Trommel parallel zur Trommelachse in und entgegen der Transportrichtung der Werkstücke verschiebbar sein, wobei sich die Größe des Verschiebeweges der Lamellen verändern läßt. Hierdurch wird erreicht, daß die Werkstücke ohne zusätzliche Transporthilfsmittel axial durch die Trommel hindurchgefördert werden können, und daß sich die Transportgeschwindigkeit durch Änderung des Verschiebeweges auf die gewünschte Größe einstellen läßt. Die Anlenklager der Lamellenkanten in den Tragringen können, wie die Erfindung schließlich vorsieht, als Kippbewegungen winklig zur Schwenkachse zulassende Schwenk-Kipp-Lager ausgebildet sein, und eine der die Tragringe tragenden Tragrollen eine axial verschiebliche Lagerung aufweisen, die durch einen stufenlosen Stellmotor beaufschlagt wird.Are, as the invention further provides, the guides arranged outside the drum for the slats during their passage through the upper portion of the orbit of the drum shell protruding into the interior of the drum, in the form of guide rails which capture the free end edges of the slats and hold, then these are outside the blasting area of the blasting devices and practically do not hinder the passage of the workpieces through the front openings of the drum. The lamellae can be displaceable parallel to the drum axis in and against the transport direction of the workpieces during the rotation of the drum, the size of the displacement path of the lamellae being changeable. This ensures that the workpieces can be conveyed axially through the drum without additional transport aids, and that the transport speed can be adjusted to the desired size by changing the displacement path. The link bearings of the lamellar edges in the support rings can, as the invention finally provides, be designed as tilting movements that permit angular movement to the pivot axis, and one of the support rings carrying the support rings has an axially displaceable bearing which is acted upon by a stepless servomotor.
Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. In der Zeichnung zeigen
- Fig. 1 die Maschine trommelstirnseitig gesehen,
- Fig. 2 einen Schnitt nach der Linie A-B durch Fig. 1 und
- Fig. 3 die Maschine im Axialschnitt.
- 1 seen the machine drum end,
- Fig. 2 shows a section along the line AB through Fig. 1 and
- Fig. 3 shows the machine in axial section.
Wie aus Fig. 1 zu ersehen, sind die Lamellen 9 mittels der Achsbolzen 10 (vgl. auch Fig. 2) mit einer Längskante 9a nach innen schwenkbar an den Tragringen 8 angelenkt. Sie liegen (vgl. den unteren Bereich der Tragringe 8) mit der freien anderen Längskante 9b auf der angelenkten Längskante 9a der jeweils benachbarten Lamelle 9 auf. Im oberen Abschnitt des Tragrings 8 bilden benachbarte Lamellen 9, aufgrund der Schwerkraft nach innen unten geschwenkt eine Spaltöffnung Ö, oberhalb derer eine Schleuderrad-Strahlvorrichtung 1 auf dem Maschinengehäuse 2 angeordnet ist. Diese Schleuderrad-Strahlvorrichtung kann (vgl. Fig. 3) auf nicht dargestellte Weise in durch den Pfeil P angedeuteten Richtungen über der Spaltöffnung Ö verschoben werden. Die auf diese Weise von den Lamellen 9 gebildete Trommel liegt auf den unteren Tragrollen-Paare-5, 7 mit den Achsen 27, 21 auf und wird weiter durch eine obere Führungsrolle 6 geführt. Der Antrieb der Trommel erfolgt über die Hubklinken 12, die die (Achs)-Bolzen 10 der Lamellen 9 unterfassen und über einen Schwenklenker 13 mittels der Kurbelstange 14 auf- und abbewegt werden, die ihrerseits mit dem hier als Elektromotor ausgebildeten Motor 15 verbunden ist. Der Motor 15 ist auf einer Schwenkkonsole 20 angeordnet, die von einem Lastbegrenzungsfühler 16 in Arbeitslage gehalten wird und bei Auftreten einer Überlast das Ausklinken der Hubklinke bewirkt. Eine ebenfalls auf den (Achs)-Bolzen 10 aufliegende Sperrklinke 11 verhindert eine Rückdrehbewegung der Tragringe 8.As can be seen from FIG. 1, the
Die Werkstücke W werden in der durch den Pfeil R angedeuteten Richtung (vgl. Fig. 3) mittels einer Zubringerrinne 3a stirnseitig in die aus den Lamellen 9 gebildete Trommel eingebracht und innerhalb der Trommel dadurch weiterbefördert, daß die Lamellen 9 während der Trommelumdrehungen parallel zur Trommeldrehachse in Transportrichtung der Werkstücke W und entgegen dieser Richtung um eine voreinstellbare Strecke verschoben werden. Dies wird, wie aus Fig. 2 zu ersehen, dadurch erreicht, daß das Tragrollenpaar 7 zusammen mit seiner Achse 21 über einen Gleitring 17 und eine Stellkulisse 18 parallel zur Trommelachse verschoben werden. Die Verschiebung bewirkt eine Änderung des Neigungswinkels der Tragringe 8 zur Trommeldrehachse und damit die Verschiebung der Lamellen 9 in und entgegen der Transportrichtung der Werkstücke W während eines Umlaufes und damit zu einer schraubenförmigen Transportbewegung der im unteren Bereich der Trommel auf den Lamellen 9 aufliegenden Werkstücke W. Die Schwenklager der Lamellen 9 an den Tragringen 8 sind dabei so ausgebildet, daß sie die winkligen Kippbewegungen der Tragringe 8 zulassen, hier in der Weise, daß die Lagerflächen für die (Achs)-Bolzen 10 im Tragring ballig ausgebildet sind. Je nach der Größe des gewählten Verschiebeweges der Achse 21 der Tragrollen 7 ist die Durchgangsgeschwindigkeit bei gleichbleibender Trommeldrehgeschwindigkeit veränderbar. Die freien Enden 9c der Lamellen 9 werden (wie aus Fig. 1 in Verbindung mit Fig. 3) hervorgeht, während des Umlaufs im oberen Bereich zusätzlich durch eine in die stirnseitige Öffnung der durch die Lamellen 9 gebildeten Trommel hineinragende, ortsfest mit dem Maschinengehäuse 2 verbundene Leitkurvenleiste 19 so geführt, daß sich die im oberen Bereich bildende Spaltöffnung Ö schließt, sobald sie den Strahlbereich der Schleuderradstrahlvorrichtung 1 verlassen hat.The workpieces W are introduced in the direction indicated by the arrow R (see FIG. 3) by means of a
Unterhalb des Maschinengehäuses ist eine bekannte Sammelrinne 23 für das abzuführende verbrauchte Strahlmittel und die übrigen Verunreinigungen (Sand) angeordnet. Das Strahlmittel wird nach Aufbereitung in bekannter Weise durch den Strahlmittelkreislauf 4 wieder der Schleuderradstrahlvorrichtung zugeführt. Die Zuführung kann auf nicht dargestellte Weise jeweils für den Zeitabschnitt unterbrochen werden, in dem sich eine Lamelle 9 durch den Strahlbereich der Schleuderradstrahlvorrichtung 1 hindurchbewegt.A known collecting
Claims (6)
characterised in that
the drum jacket is constructed in a manner known per si from a plurality of louvre slats (g), wherein these strips are articulated with one longitudinal edge (9a) to the inner edge (8a) of the annular carrier (8) and with their other free longitudinal edge (9b) lie against the articulated longitudinal edge (9a) of the adjacent slat (9).
characterised in that
the guides, projecting into the inner space of the cylinder, in the form of curved guide strips (19) receive and hold the free end edges (9c) of the slats (9).
characterised in that
the slats (9) are movable during the movement of the cylinder, parallel to the cylinder axis both in and opposite to the transport direction of the workpieces (W).
characterised in that
the magnitude of the available movement of the slats (9) is alterable.
characterised in that
the articulation bearings (10) of the slat edges (9a) in the annular carriers (8) are constructed as swing and tip bearings permitting tipping movement at an angle to the swing axis, and one of the support rollers (7) supporting the annular carrier (8) has an axially movable bearing (17).
characterised in that
the axially movable bearing (17) is operated by a stepless servomotor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8282106823T DE3275983D1 (en) | 1982-07-28 | 1982-07-28 | Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions |
| EP19820106823 EP0099939B1 (en) | 1982-07-28 | 1982-07-28 | Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19820106823 EP0099939B1 (en) | 1982-07-28 | 1982-07-28 | Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0099939A1 EP0099939A1 (en) | 1984-02-08 |
| EP0099939B1 true EP0099939B1 (en) | 1987-04-08 |
Family
ID=8189150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19820106823 Expired EP0099939B1 (en) | 1982-07-28 | 1982-07-28 | Barrel abrasive blasting machine for the abrasive-blasting treatment of large workpieces having the same or different dimensions |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0099939B1 (en) |
| DE (1) | DE3275983D1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107263333B (en) * | 2017-08-03 | 2018-11-27 | 大唐山东烟台电力开发有限公司 | A kind of wind power generation stepped drum outer wall clears up shot-blasting machine automatically |
| CN107263330B (en) * | 2017-08-11 | 2023-06-23 | 新乡宏达冶金振动设备有限公司 | Incomplete utmost point shot-blasting machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE109648C (en) * | ||||
| DE351183C (en) * | 1921-04-05 | 1922-04-03 | Badische Maschinenfabrik & Eis | Sandblasting drum with automatic sand backfeed into the sand chamber of the sandblasting fan |
| DE664971C (en) * | 1937-05-20 | 1938-09-08 | Bernhard Berg | Sandblasting drum |
| DE690938C (en) * | 1938-02-15 | 1940-05-11 | Karl Grocholl | Device for cleaning, descaling or the like of workpieces |
-
1982
- 1982-07-28 DE DE8282106823T patent/DE3275983D1/en not_active Expired
- 1982-07-28 EP EP19820106823 patent/EP0099939B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0099939A1 (en) | 1984-02-08 |
| DE3275983D1 (en) | 1987-05-14 |
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