EP0611275A1 - Procédé et dispositif pour la séparation de petites pièces - Google Patents

Procédé et dispositif pour la séparation de petites pièces Download PDF

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Publication number
EP0611275A1
EP0611275A1 EP94890016A EP94890016A EP0611275A1 EP 0611275 A1 EP0611275 A1 EP 0611275A1 EP 94890016 A EP94890016 A EP 94890016A EP 94890016 A EP94890016 A EP 94890016A EP 0611275 A1 EP0611275 A1 EP 0611275A1
Authority
EP
European Patent Office
Prior art keywords
container
workpiece
mixture
workpieces
abrasive
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
EP94890016A
Other languages
German (de)
English (en)
Other versions
EP0611275B1 (fr
Inventor
Wolfram Dipl.-Ing. Schaupp
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.)
Johann Tauss GmbH
Original Assignee
Johann Tauss 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 Johann Tauss GmbH filed Critical Johann Tauss GmbH
Publication of EP0611275A1 publication Critical patent/EP0611275A1/fr
Application granted granted Critical
Publication of EP0611275B1 publication Critical patent/EP0611275B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • B24B31/16—Means for separating the workpiece from the abrasive medium at the end of operation

Definitions

  • the invention relates to a method for separating small workpieces from a workpiece-abrasive mixture, wherein the workpiece-abrasive mixture is introduced into a liquid and the separation is carried out after the body has risen and descended in the liquid.
  • the invention further relates to a device for carrying out such a method.
  • Such devices can e.g. be designed as centrifugal force devices or as vibration devices.
  • the two mixture parts can be separated after machining the workpieces using a vibrating sieve through which the grinding bodies fall and in which the workpieces are retained.
  • this method cannot be used for grinding bodies and workpieces that are not very different in size. It has to be sorted out manually in a very time-consuming manner.
  • EP-A1-301 608 proposes a method of the type mentioned at the outset in which the grinding wheels and workpieces are separated statically, which takes a very long time.
  • the invention has set itself the goal of creating a method by means of which even small workpieces which correspond in size to the grinding wheels can be sorted out quickly and reliably from a grinding wheel / workpiece mixture. This is achieved in that the workpiece-abrasive mixture in a container is exposed to an upward flow of liquid, in particular water, the absolute flow rate of which is between the sinking speed of the workpieces and the sinking speed of the grinding wheels is and the heavier mixture parts, in particular workpieces, are collected at the bottom of the container, the lighter mixture parts, in particular the grinding wheels, are pulled off at the top.
  • liquid in particular water
  • a device which is characterized according to the invention in that a sieve basket having a closed bottom is inserted into a container which is provided in the bottom with a feed line from a pump and into which a nozzle which opens a feed opening for the workpiece-abrasive mixture is provided.
  • a sieve basket having a closed bottom is inserted into a container which is provided in the bottom with a feed line from a pump and into which a nozzle which opens a feed opening for the workpiece-abrasive mixture is provided.
  • the container is surrounded by a collar in the form of a drainage channel which directs the liquid mixed with grinding media to a collecting container.
  • the collecting container is designed as a strainer basket and is arranged in a housing which also accommodates the pump and the container.
  • the pump is expediently designed to be controllable.
  • the controllability can e.g. can be achieved by speed control or volume control via cover slides. This enables a change in the flow rate of the liquid and thus an adaptation to the sinking speeds of the workpieces and the grinding wheels.
  • FIG. 1 schematically shows in section a device according to the invention and FIG. 2 shows the diagram of the different speeds.
  • a container 2, a pump 3 and a collecting container 4 designed as a strainer basket are arranged in a housing 1.
  • the housing 1 is after open at the top and filled with liquid, especially water, up to the indicated height.
  • the container 2 is connected at its bottom to the pressure line 5 of the pump 3, the suction takes place via a suction line 6.
  • a sieve basket 7 is inserted into the container 2, which is expediently provided with a closed bottom 8.
  • a nozzle 9 dips somewhat into the strainer basket 7, an annular space remaining free between the nozzle wall and the strainer basket.
  • the container 2 is closed except for the opening for the nozzle 9.
  • An inclined drainage channel 10 leading to the collecting container 4 surrounds the container 2 in a collar shape.
  • the liquid conveyed by the pump 3 flows upwards essentially to the side of the strainer basket 7 and enters the latter through the annular space between the container 7 and the nozzle 9.
  • the narrowing of the nozzle 9 is flowed through at a speed which is uniformly distributed over the entire cross section.
  • a workpiece and abrasive mixture applied from above has a tendency to sink downwards. Due to the different sinking speed between the workpiece parts on the one hand and the grinding wheel parts on the other hand, however, only the workpieces will sink downwards, whereas the grinding wheel will be carried upwards by the liquid. There they flood the upper end of the nozzle together with the liquid and are passed via the drainage channel 10 into the collecting container 4.
  • the grinding wheels can easily be removed from the collecting container 4 and the workpieces from the sieve basket 7.
  • the screen basket 7 can be pulled out of the container 2 for this purpose.
  • the device according to the invention can be varied in many ways. For example, At the beginning of the nozzle 9 guide vanes 11 are arranged to even out the flow rate of the liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Centrifugal Separators (AREA)
EP19940890016 1993-02-12 1994-01-20 Procédé et dispositif pour la séparation de petites pièces Expired - Lifetime EP0611275B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT26593A AT399105B (de) 1993-02-12 1993-02-12 Verfahren und vorrichtung zum absondern von kleinen werkstücken
AT265/93 1993-02-12

Publications (2)

Publication Number Publication Date
EP0611275A1 true EP0611275A1 (fr) 1994-08-17
EP0611275B1 EP0611275B1 (fr) 1996-12-04

Family

ID=3485943

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940890016 Expired - Lifetime EP0611275B1 (fr) 1993-02-12 1994-01-20 Procédé et dispositif pour la séparation de petites pièces

Country Status (3)

Country Link
EP (1) EP0611275B1 (fr)
AT (1) AT399105B (fr)
DE (1) DE59401174D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2819738A1 (fr) * 2001-01-25 2002-07-26 Creafusion Dispositif de triage d'un melange de pieces metalliques et de particules abrasives

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE431051C (de) * 1924-11-29 1926-06-26 Chauny & Cirey Mechanische Gleicherhaltung der Dichtigkeit von fliessenden Mischungen aus einer Fluessigkeit mit koernigem Material, z. B. Schleiffluessigkeit
FR955610A (fr) * 1950-01-18
GB2073617A (en) * 1980-04-15 1981-10-21 Shaw A Classification method and apparatus
EP0301608A1 (fr) * 1987-07-25 1989-02-01 Metallgesellschaft Ag Procédé pour séparer des pièces et des corps de traitement
GB2258173A (en) * 1991-07-27 1993-02-03 Tsukio Takada Sorting apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210972C2 (de) * 1982-03-25 1986-08-07 Alu Plast Aluminium-Plastik Recycling GmbH, 5440 Mayen Sinkscheider für Kunststoffgemische
DE3339026A1 (de) * 1983-10-27 1985-05-09 Schönert, Klaus, Prof. Dr.-Ing., 3392 Clausthal-Zellerfeld Setzverfahren zum trennen eines feinkorn-gemenges nach der partikeldichte
DE3517931A1 (de) * 1985-05-18 1986-11-20 Schauenburg Maschinen- und Anlagen-Bau GmbH, 4330 Mülheim Verwendung eines wirbelschicht-truebesortierers als sortiervorrichtung bei der aufbereitung von flotationsbergen
DE3615616C2 (de) * 1986-05-09 1995-04-13 Manfred Hefft Verfahren zur Fraktionierung von feinen dispersen Feststoffen und Anordnung zur Durchführung des Verfahrens

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955610A (fr) * 1950-01-18
DE431051C (de) * 1924-11-29 1926-06-26 Chauny & Cirey Mechanische Gleicherhaltung der Dichtigkeit von fliessenden Mischungen aus einer Fluessigkeit mit koernigem Material, z. B. Schleiffluessigkeit
GB2073617A (en) * 1980-04-15 1981-10-21 Shaw A Classification method and apparatus
EP0301608A1 (fr) * 1987-07-25 1989-02-01 Metallgesellschaft Ag Procédé pour séparer des pièces et des corps de traitement
GB2258173A (en) * 1991-07-27 1993-02-03 Tsukio Takada Sorting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2819738A1 (fr) * 2001-01-25 2002-07-26 Creafusion Dispositif de triage d'un melange de pieces metalliques et de particules abrasives
EP1226872A1 (fr) * 2001-01-25 2002-07-31 Sarl Creafusion Dispositif de triage d'un mélange de pièces métalliques et de particles abrasives

Also Published As

Publication number Publication date
ATA26593A (de) 1994-08-15
EP0611275B1 (fr) 1996-12-04
DE59401174D1 (de) 1997-01-16
AT399105B (de) 1995-03-27

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