EP0023999A1 - Machine d'ébarbage - Google Patents

Machine d'ébarbage Download PDF

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Publication number
EP0023999A1
EP0023999A1 EP80104424A EP80104424A EP0023999A1 EP 0023999 A1 EP0023999 A1 EP 0023999A1 EP 80104424 A EP80104424 A EP 80104424A EP 80104424 A EP80104424 A EP 80104424A EP 0023999 A1 EP0023999 A1 EP 0023999A1
Authority
EP
European Patent Office
Prior art keywords
wall
cleaning machine
machine according
drum
parts
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
Application number
EP80104424A
Other languages
German (de)
English (en)
Other versions
EP0023999B1 (fr
Inventor
Martin Weis
Hermann Dumbs
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BMD Badische Maschinenfabrik Durlach GmbH
Original Assignee
Badische Maschinenfabrik GmbH
BMD Badische Maschinenfabrik Durlach GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Badische Maschinenfabrik GmbH, BMD Badische Maschinenfabrik Durlach GmbH filed Critical Badische Maschinenfabrik GmbH
Publication of EP0023999A1 publication Critical patent/EP0023999A1/fr
Application granted granted Critical
Publication of EP0023999B1 publication Critical patent/EP0023999B1/fr
Expired legal-status Critical Current

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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 cleaning machine for castings with a cleaning drum, which is driven with a central angle of about 12 0 o oscillating about its longitudinal axis, is inclined from an end fill opening to an opposite discharge opening and is provided with a jet opening extending in the longitudinal axis, and with one or more centrifugal wheels arranged fixed above the jet opening.
  • cleaning drums of the aforementioned construction have the advantage of Leiner continuous operation, in which the castings are placed on one end face, blasted during the run at an adjustable speed, if necessary, and continuously discharged on the other end face of the drum.
  • the cleaning drum with its peripheral jet opening moves back and forth under the centrifugal wheels.
  • the central angle of the oscillating movement and thus also the width of the jet opening depend essentially on the desired degree of filling of the drum and the shape change that the castings in the drum should be completely circulated if possible.
  • a central angle of approx. 120 ° has proven to be favorable. Nevertheless, the demand for complete circulation of the castings with oscillating cleaning drums is much more difficult to fulfill than with batch-wise, but continuously rotating drums.
  • the cleaning drum has a partially cylindrical cross section.
  • the drum wall is drawn in angled inwards in order to achieve the greatest possible central angle for the oscillating movement without the risk of the castings falling out over the opening edge.
  • satisfactory cleaning results cannot be achieved with such a drum in many casting molds, since the drum filling slips on the smooth cylindrical wall without any circulation.
  • complex internals must be provided in drums of this construction to ensure that the castings are turned and blasted on all sides.
  • the internals must be adapted to the respective casting shapes, on the one hand to meet the requirement for complete circulation, and on the other hand not to damage sensitive castings. This often requires extensive preliminary tests.
  • the invention has for its object to provide a cleaning machine of the construction described above with an oscillating cleaning drum so that - regardless of the workpiece shape and the degree of filling of the cleaning drum - a complete circulation of the castings is always ensured.
  • the wall of the drum has a polygonal cross-section and two at an angle of about 12o o therebetween enclosing floor parts and it subsequent to the beam aperture wall parts.
  • the angle of 120 ° means that with an oscillation angle of approximately 12o in each of the two end positions of the drum, a bottom part is approximately vertical, so that even those castings that are taken to the end position without relative movement with respect to the drum wall, at the latest in overturn this position and fall back. Practical tests have shown that this result occurs regardless of the shape of the castings.
  • the included angle of the bottom parts is slightly less than 120 °, for example between 110 ° and 116 0th This ensures that at an oscillation angle of 120 ° one of the bottom parts in the end positions of the drum is slightly inclined inwards, so that even large and bulky castings tip at the latest in this position.
  • the design of the drum according to the invention not only leads to flawlessly blasted castings, but is, in particular, considerably less expensive than plastering machines with a trough or caterpillar belt.
  • the wall parts adjoining each of the bottom parts can consist of two wall sections, the angular position of which relative to one another and to the bottom part is dimensioned such that the wall of the drum in the region of the edge of the jet opening is slightly drawn inwards. This avoids that a casting that comes into trudein can fall out of the drum.
  • a profile strip covering the inside of the joint is arranged in the region of the joint between the two floor parts.
  • This profile strip ensures that a casting cannot slide unhindered from one base part to the other during the drum movement, but rather finds an obstacle that causes circulation. It should be emphasized, however, that - in contrast to the prior art - one such profile is sufficient.
  • the profile strip is advantageously fastened by means of screws and the two bottom parts of the counter pieces lying on the outside.
  • This version offers particular advantages if the individual wall sections are not connected to form a one-piece drum body, but rather are individually attached to the drum. In this case, the two base parts are clamped together by the profile strip and the counterpart and at the same time the gap between them is sealed.
  • the floor and wall parts are preferably on a false structure of the Removable drum attached.
  • the support structure can consist of at least two support rings and longitudinal beams connecting them, the base and wall parts being releasably attached to the support rings.
  • the floor and wall parts which are generally exposed to different levels of wear, can therefore be replaced individually.
  • the floor and wall parts have sets on their outside and are attached by means of wedges acting on these and the support rings.
  • This wedge connection is particularly suitable for robust operation in the foundry and allows easy assembly and easy replacement of the floor and wall parts.
  • the bottom and wall parts have on their outside a web forming the shoulder and the support rings have a flange parallel to the floor and wall parts, which has laterally arranged slots for receiving the axial ends of the webs, the webs in Area of their ends each have a hole for the wedge engaging behind the flange of the support rings. If necessary. the wedge can be secured by means of a detachably attached stop.
  • the wedge connection not only has the above-mentioned advantages with regard to assembly and replacement, but also the advantage that it is always easy to loosen even after blasting agent access, which leads to welding with other connections.
  • the cleaning machine shown schematically in FIG. 1 consists of a cleaning drum 1 and a cleaning booth 2 surrounding it in a dustproof manner, which is closed at the end by rubber curtains 3, 4 or the like.
  • a cleaning drum 1 On the ceiling of the cleaning booth 2, two or more centrifugal wheels 5 are fixed in place.
  • the castings can be supplied, for example, via a vibrating trough 6, while the discharge through the rubber curtain 4 takes place via a slide (not shown) or the like.
  • the cleaning drum 1 has races 7, by means of which it runs on roller sets 8.
  • the drive can be conventional.
  • the axis of the cleaning drum 1 is inclined to fall from the filling opening 9 to the discharge opening 10. Instead, however, the races 7 can also be arranged perpendicularly and only the drum wall can be inclined.
  • the cleaning drum 1 also has a supporting structure which consists of longitudinal beams 11, e.g. consists of square tube, and consists of several juxtaposed rings 12 which are attached to the side members 11.
  • the longitudinal members themselves connect the races 7 to one another or to an end flange 13 arranged at the discharge opening 10.
  • the filling opening 9 is provided in a disk 14 which is arranged in a stationary manner and leaves only a small gap to the front end 15 of the cleaning drum 1.
  • the wall of the cleaning drum 1 is cut out in the area below the centrifugal wheels 5 (FIG. 1) to form a jet opening (16).
  • the sector is selected so that the drum can sweep a central angle of approximately 120 ° with oscillating rotation about its longitudinal axis, without the blasting agent hitting the edge of the blasting opening 16 or outside it.
  • the drum wall has two large-area bottom parts 17 which - when the cleaning drum 1 is in the rest position - collide in its lower apex.
  • the two base parts 17 enclose an angle ⁇ of slightly less than 120 °, for example of 112 °.
  • the bottom parts 17 and the wall sections 2 0 , 21 are not produced as a one-piece body in the exemplary embodiment shown, but consist of individual strips 25 of the same dimension, the length of which corresponds approximately to the distance between the rings 12 (FIG. 1).
  • Each bar 22 has a web 23 on its outside, so it is designed as a T-profile.
  • the support rings 12 are designed in the manner of a T profile, that is to say they have a flange 24 which is arranged essentially parallel to the strips 22, and an outwardly pointing web 25.
  • the flanges 24 of the support rings 12 are in one of the arrangement of the base parts 17 and wall parts 18 corresponding cross-sectional contour arranged.
  • their web 25 can have an outer contour that varies over the circumference, in order in this way for the Recording the bending moment responsible for adapting the area torque to the distance between the longitudinal beams 11.
  • the strips 22 are partially perforated at least in the area of the loden parts 17 in order to allow the blasting agent and the particles resulting from the cleaning to pass through.
  • the webs 23 attached to the back of the strips 22 are detachably attached to the support rings 12 in the region of their ends by means of a wedge connection 26, which is indicated at the top right in FIG. 2.
  • a wedge connection 26 which is indicated at the top right in FIG. 2.
  • the wedge connection 26 is shown enlarged in FIG. 3.
  • the flanges 24 of the support rings 12 are laterally provided with slots 27 ′ into which the ends of the webs 23 attached to the strips 22 engage.
  • the webs 23 have holes 28 in the area of these ends, which - seen from the inside of the drum - are in the assembly position beyond the flanges 24 of the support rings 12.
  • a hammer wedge 29 is hammered into the holes 28 on the back of the flanges 24, the wedge engagement surface 30 being on the side facing away from the flange 24.
  • a stop plate 31 which has an elongated hole 32 and is fixed by means of a screw 33 which passes through the shaft of the wedge 29 so that it rests with its upper edge 34 on the lower edge of the bar 23.
  • FIG. 4 shows a longitudinal section through the cleaning drum 1 in the blasting zone, ie in the area below the blast wheels 5 (FIG. 1).
  • the blasting agent can pass through the perforation of the strips 22 with a considerable amount of energy.
  • each support ring is assigned a circumferential wear protection 35 on the sides facing the perforation, which is designed and arranged in such a way that it can be easily replaced. In the simplest case, it consists of a sheet metal construction.
  • a sheet metal covering 36 providing wear protection is placed over each longitudinal beam 11 and extends in particular in the area between the wear protection 35 covering the support rings 12.
  • the support rings 12 no longer need to be protected separately, since the blasting agent and cleaning particles are only subjected to gravity fall out down.
  • a sheet metal cladding 36 is therefore only provided for the longitudinal members.
  • a profile strip 38 is indicated in the region of the lower joint 37. As can be seen in more detail from FIG. B, this profile strip 38 covers the joint 37, which gives the tolerances required for the exact mounting of the strip 22.
  • the profile strip 38 is triangular in cross section and lies loosely on the two lower strips 22 with its lower edges. It is clamped against the strips 22 by means of a screw bolt 39, correspondingly shaped counter pieces 41 being inserted between the clamping nuts 4o and the underside of the strips 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Nozzles For Electric Vacuum Cleaners (AREA)
  • Continuous Casting (AREA)
EP80104424A 1979-08-03 1980-07-28 Machine d'ébarbage Expired EP0023999B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2931578 1979-08-03
DE2931578A DE2931578C2 (de) 1979-08-03 1979-08-03 Putzmaschine für Gußstücke

Publications (2)

Publication Number Publication Date
EP0023999A1 true EP0023999A1 (fr) 1981-02-18
EP0023999B1 EP0023999B1 (fr) 1983-03-09

Family

ID=6077583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104424A Expired EP0023999B1 (fr) 1979-08-03 1980-07-28 Machine d'ébarbage

Country Status (3)

Country Link
US (1) US4319624A (fr)
EP (1) EP0023999B1 (fr)
DE (1) DE2931578C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161814A2 (fr) * 1984-04-20 1985-11-21 Kennecott Corporation Méthode et dispositif pour le nettoyage de pièces

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155649B (en) * 1984-02-06 1988-11-09 Konishiroku Photo Ind Camera
US4757648A (en) * 1986-08-04 1988-07-19 Pangborn Corporation Rocker barrel configuration
US5531263A (en) * 1993-10-08 1996-07-02 Sintokogio, Ltd. Oscillating trough for shot blast

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD85288A (fr) *
DD34667A (fr) *
US1692864A (en) * 1924-01-14 1928-11-27 Jr Elmer A Rich Sand-blast machine
US2422786A (en) * 1944-08-31 1947-06-24 Pangborn Corp Tumbling mill and method of tumbling
US2440819A (en) * 1944-03-09 1948-05-04 Pangborn Corp Tumbling mill
GB801683A (en) * 1953-10-12 1958-09-17 H G Sommerfield Ltd Improvements relating to apparatus for continuously re-orientating articles during treatment thereof
US3172644A (en) * 1963-03-12 1965-03-09 Dean F Smith Rotary tumbler and method for making same
US3431684A (en) * 1966-10-27 1969-03-11 Mcdowell Wellman Eng Co Rotary abrading device
DE2424086A1 (de) * 1974-05-17 1975-11-27 Vogel & Schemmann Masch Fliesstrommel zur kontinuierlichen bestrahlung von gusstuecken mit hilfe von schleuderraedern
DE2806238A1 (de) * 1978-02-14 1979-08-16 Arenco Bmd Maschfab Putzmaschine fuer gusstuecke und andere werkstuecke

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US338847A (en) * 1886-03-30 Stephen b
US2519162A (en) * 1948-03-15 1950-08-15 Thomas T Tucker Acoustic testing structure including sound absorbing panels
US3795311A (en) * 1973-03-23 1974-03-05 Universal Oil Prod Co Mounting assembly for vibrating screen deck

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD85288A (fr) *
DD34667A (fr) *
US1692864A (en) * 1924-01-14 1928-11-27 Jr Elmer A Rich Sand-blast machine
US2440819A (en) * 1944-03-09 1948-05-04 Pangborn Corp Tumbling mill
US2422786A (en) * 1944-08-31 1947-06-24 Pangborn Corp Tumbling mill and method of tumbling
GB801683A (en) * 1953-10-12 1958-09-17 H G Sommerfield Ltd Improvements relating to apparatus for continuously re-orientating articles during treatment thereof
US3172644A (en) * 1963-03-12 1965-03-09 Dean F Smith Rotary tumbler and method for making same
US3431684A (en) * 1966-10-27 1969-03-11 Mcdowell Wellman Eng Co Rotary abrading device
DE2424086A1 (de) * 1974-05-17 1975-11-27 Vogel & Schemmann Masch Fliesstrommel zur kontinuierlichen bestrahlung von gusstuecken mit hilfe von schleuderraedern
DE2806238A1 (de) * 1978-02-14 1979-08-16 Arenco Bmd Maschfab Putzmaschine fuer gusstuecke und andere werkstuecke

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0161814A2 (fr) * 1984-04-20 1985-11-21 Kennecott Corporation Méthode et dispositif pour le nettoyage de pièces
EP0161814A3 (fr) * 1984-04-20 1988-09-07 Kennecott Corporation Méthode et dispositif pour le nettoyage de pièces

Also Published As

Publication number Publication date
DE2931578C2 (de) 1983-11-24
DE2931578A1 (de) 1981-02-19
EP0023999B1 (fr) 1983-03-09
US4319624A (en) 1982-03-16

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