EP1545834B1 - Appareil et procede de nettoyage, d'ebavurage et de polissage de pieces dans un champ magnetique - Google Patents

Appareil et procede de nettoyage, d'ebavurage et de polissage de pieces dans un champ magnetique Download PDF

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Publication number
EP1545834B1
EP1545834B1 EP03791068A EP03791068A EP1545834B1 EP 1545834 B1 EP1545834 B1 EP 1545834B1 EP 03791068 A EP03791068 A EP 03791068A EP 03791068 A EP03791068 A EP 03791068A EP 1545834 B1 EP1545834 B1 EP 1545834B1
Authority
EP
European Patent Office
Prior art keywords
container
ferromagnetic
parts
rotating disc
deburring
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
Application number
EP03791068A
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German (de)
English (en)
Other versions
EP1545834A1 (fr
Inventor
Janos Kodacsy
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Individual
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Individual
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Publication date
Priority claimed from HU0202913A external-priority patent/HU0202913D0/hu
Priority claimed from HU0302713A external-priority patent/HU223855B1/hu
Application filed by Individual filed Critical Individual
Publication of EP1545834A1 publication Critical patent/EP1545834A1/fr
Application granted granted Critical
Publication of EP1545834B1 publication Critical patent/EP1545834B1/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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • 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
    • B24B31/003—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 whereby the workpieces are mounted on a holder and are immersed in the abrasive material
    • 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
    • B24B31/02—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 involving rotary barrels

Definitions

  • the present invention is an apparatus according to claim 1 as well as a method according to claim 3.
  • Modem manufacturing technology processes have to meet uniform requirements of reliability, accuracy, productivity and cost-effectiveness producing the lowest possible environmental load. Cleaning, deburring and polishing processes are no exception to this rule.
  • the productivity of known methods can be increased by carrying out the machining in magnetic field, which also gives way to handling parts of non-conventional materials or geometry.
  • a number of methods for abrasive grinding in magnetic field one of which being the so called barrel deburring method.
  • the abrasive parts and the workpieces are loaded into a revolving plastic container, with the ferromagnetic part of the barrel's contents being restrained by magnetic shoes enclosing the rotating barrel.
  • the relative velocity of workpieces and abrasive parts can be increased and machining can be made more productive.
  • Such a method is disclosed in the document HU 204,217.
  • a drawback of the method is that the limited diameter of the barrel restricts the size of parts that can be processed, and loading and emptying the barrel may also pose problems.
  • the applicable rotational speed and the relative velocity of workpieces and abrasive parts is heavily affected by the magnetic field strength, which decreases if the barrel diameter is increased.
  • Magnetic deburring and polishing machines are nowadays produced commercially.
  • one type of such a machine utilises plastic containers with a diameter of 160-600 mm and a height of 160-540 mm ( www.earth-chain.com.tw ).
  • Magnets of the machine are located below the open-top container on a rotating table, with the ferromagnetic abrasive parts, disposed inside the stationary container, being rotated by the magnetic force exerted on them by the rotating magnets.
  • the abrasive parts collide with the non-ferromagnetic workpieces loaded into the container, deburring and polishing them.
  • the apparatus is only capable of machining non-ferromagnetic parts, and it can be problematic to sufficiently retain smaller-size parts and to provide for the necessary orientation of larger ones.
  • the apparatus described in document US4730418 is suitable for cleaning, deburring and polishing parts in a magnetic field, and comprises a non-magnetic container implemented as a revolving drum, an electromagnet, an electric motor, a magnetisable rotating disc, further a table supporting the electromagnet and a ferromagnetic ring and ensuring the closing of magnetic lines of force; with the rotating disc being fitted with an upper and a bottom bearing and being driven through a belt drive by means of an electric motor; and further comprising a power supply for adjusting the stationary magnetic field generated by the electromagnet.
  • a non-magnetic container implemented as a revolving drum, an electromagnet, an electric motor, a magnetisable rotating disc, further a table supporting the electromagnet and a ferromagnetic ring and ensuring the closing of magnetic lines of force
  • the rotating disc being fitted with an upper and a bottom bearing and being driven through a belt drive by means of an electric motor
  • a power supply for adjusting the stationary magnetic field generated
  • the aim of the present invention is therefore to provide a cleaning, deburring and polishing apparatus and method that remedies the problems encountered with devices according to the state of the art.
  • the ferromagnetic portion of the contents of the container is rotated by means of a magnetisable disc that is disposed inside the container (which can also be rotated in a controllable way) and is magnetised to the desired extent by means of an electromagnet generating stationary magnetic field.
  • Non-ferromagnetic elements in the container conform to the rotation of the container, which means that in case the container is stopped the non-ferromagnetic elements are also brought to a halt.
  • the apparatus can be used for machining both ferromagnetic and non-ferromagnetic elements, and only environmentally friendly materials can be utilised as additional media.
  • the invention is based on the insight that it is preferable to adjust the relative velocity of the different parts of the contents of the container to meet requirements of changing operating conditions. This can be achieved by ensuring that the rotational speed of the rotating disc and also the magnetisation level thereof can be adjusted continuously, and by providing that the container can be braked and the rotational direction thereof can be reversed. It has also been observed that in a strong magnetic field the conventional deep groove ball bearing can be utilised as a flexible coupling element.
  • the magnetic transmission element (the magnetisable disc) may be disposed in the interior of the container, in the immediate proximity of the parts loaded thereto.
  • the inventive goal is achieved by providing an apparatus according to claim 1 and a method of claim 3.
  • the apparatus shown in Fig. 1 consists essentially of a plastic container 5, a magnetisable rotating disc 3, a braking means 6, a rotating iron core 10, a deep groove ball bearing 4, an electromagnet 7, an electric power supply 16, a ferromagnetic table 9, a ferromagnetic ring 8, an upper bearing 11, a bottom bearing 13, an electric motor 15, a variable frequency drive unit 14, a belt drive 12, ferromagnetic parts 2 and non-ferromagnetic abrasive parts 1, with said ferromagnetic parts 2 and non-ferromagnetic abrasive parts 1 being loaded into said container 5.
  • the container 5 is loaded with ferromagnetic abrasive parts 18, as it is shown in Fig. 2.
  • Figures 1 and 2 show an embodiment of the inventive apparatus that is suitable for cleaning, deburring and polishing ferromagnetic or non-ferromagnetic parts of small or medium size.
  • the plastic container 5 is loaded from above with ferromagnetic parts 2 or non-ferromagnetic parts 17 and, depending on whether ferromagnetic 2 or non-ferromagnetic 17 parts are to be machined, non-ferromagnetic abrasive parts 1 (made of aluminium-oxide) or ferromagnetic abrasive parts 18 (made of corrosion-resistant steel) are also loaded into the container 5.
  • non-ferromagnetic abrasive parts 1 made of aluminium-oxide
  • ferromagnetic abrasive parts 18 made of corrosion-resistant steel
  • Other materials may also be loaded into the container: in case of dry machining preferably wheat or corn flour can be utilised, while in case of wet machining a conventional, preferably environmentally friendly surface-active fluid is desirable as an additive.
  • a stationary magnetic field is generated by the electric power supply 16 and the electromagnet 7 and the intensity of the field is adjusted to the desired level.
  • the path of the magnetic lines of force closes through the rotating iron core 10, the magnetisable rotating disc 3, the ferromagnetic parts 2, the ferromagnetic ring 8 and the ferromagnetic table 9.
  • the container 5 becomes flexibly joined to the rotating iron core 10 by the deep groove ball bearing 4 that consists of magnetisable parts.
  • the container 5 is set into rotary motion by the electric motor 15 via the belt drive 12.
  • the desired rpm n 1 can be adjusted using the variable frequency drive unit 14. Due to the centrifugal force arising because of the rotation of the container 5, the contents thereof will soon be located in the vicinity of the side walls, but no material is severed from the parts at this point.
  • the velocity difference between work-pieces and abrasive parts which is necessary for abrasive action is brought about through the braking means 6 that is used to adjust the rpm n 2 ( ⁇ n 1 ) of the container.
  • the machining process finishes after the parts have become cleaned, deburred, or polished, which can be ascertained either by (ocular) inspection or by measurement. Finished parts are removed from the container 5 in the conventional way by taking them out manually or using a vacuum device, and are separated according to a known art method (e.g. magnetic or centrifugal separation).
  • a known art method e.g. magnetic or centrifugal separation
  • Fig. 2 illustrates how non-ferromagnetic work-pieces are located inside the container 5 during the operation of the inventive apparatus.
  • ferromagnetic abrasive parts 18 are applied, which rotate together with the rotating disc 3 while the rotational speed of the non-ferromagnetic parts 17 is nearly equal to the speed of the container 5.
  • the apparatus speeds up the finishing process, is cost-effective, can be controlled easily, and can be applied for machining both ferromagnetic and non-ferromagnetic parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (5)

  1. Appareil approprié pour nettoyer, ébarber et polir des pièces dans un champ magnétique, comprenant un récipient en plastique (5) implémenté sous forme de tambour rotatif, un électroaimant (7), un moteur électrique (15), un disque rotatif magnétisable (3) fermement joint à un noyau magnétique rotatif (10) qui est disposé à l'intérieur du récipient (5), un moyen de freinage (6) adapté pour limiter la rotation du récipient (5) entraîné par le moteur électrique (15), où le récipient (5) est placé sur un roulement à billes à gorge profonde magnétisable (4), lequel roulement à billes à gorge profonde magnétisable (4) sert aussi d'élément de couplage, de manière à ce que de par le moyen de freinage (6), la vitesse de rotation du récipient (5), égale au départ au tr/min n1 du disque rotatif (3), puisse être réduite à un tr/min n2, ou que le récipient (5) puisse même être arrêté pendant le fonctionnement de l'appareil ; comprenant en outre une table (9) supportant l'électroaimant (7) et une bague ferromagnétique (8) et assurant la fermeture des lignes de force magnétiques ; le disque rotatif (3) étant pourvu d'un palier supérieur (11) et inférieur (13) et étant entraîné à travers un entraînement par courroie (12) au moyen d'un moteur électrique (15) commandé par une unité d'entraînement à fréquence variable (14) ; et comprenant en outre une alimentation en courant continu (16) pour ajuster le champ magnétique constant généré par l'éléctroaimant (7).
  2. Appareil selon la revendication 1, caractérisé en ce que le moyen de freinage (6) de celui-ci est un moyen de freinage actionné par ressort.
  3. Procédé de nettoyage, d'ébarbage et de polissage de pièces avec l'appareil selon la revendication 1 ou 2, caractérisé en ce que des pièces abrasives non ferromagnétiques (1) ou ferromagnétiques (18) sont chargées dans le récipient (5) comme moyens abrasifs, selon que des pièces détachées ferromagnétiques (2) ou non ferromagnétiques (17) doivent être usinées par l'appareil.
  4. Procédé selon la revendication 3, caractérisé en ce que, selon la forme des pièces devant être usinées par l'appareil, le disque rotatif (3) de celui-ci a une configuration périmétrique - lisse ou dentée - différente.
  5. Procédé selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que de la farine de blé ou de l'amidon de maïs est chargé dans le récipient (5) de celui-ci comme moyens supplémentaires.
EP03791068A 2002-08-30 2003-08-27 Appareil et procede de nettoyage, d'ebavurage et de polissage de pieces dans un champ magnetique Expired - Lifetime EP1545834B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
HU0202913 2002-08-30
HU0202913A HU0202913D0 (fr) 2002-08-30 2002-08-30
HU0302713 2003-08-25
HU0302713A HU223855B1 (hu) 2003-08-25 2003-08-25 Berendezés alkatrészek tisztítására, sorjázására és polírozására mágneses térben
PCT/HU2003/000068 WO2004020144A1 (fr) 2002-08-30 2003-08-27 Appareil de nettoyage, d'ebavurage et de polissage de pieces dans un champ magnetique

Publications (2)

Publication Number Publication Date
EP1545834A1 EP1545834A1 (fr) 2005-06-29
EP1545834B1 true EP1545834B1 (fr) 2006-09-20

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Application Number Title Priority Date Filing Date
EP03791068A Expired - Lifetime EP1545834B1 (fr) 2002-08-30 2003-08-27 Appareil et procede de nettoyage, d'ebavurage et de polissage de pieces dans un champ magnetique

Country Status (5)

Country Link
EP (1) EP1545834B1 (fr)
AT (1) ATE340052T1 (fr)
AU (1) AU2003263375A1 (fr)
DE (1) DE60308536T2 (fr)
WO (1) WO2004020144A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013103657A1 (de) * 2013-04-11 2014-11-13 Gottfried Wilhelm Leibniz Universität Hannover Oberflächenbearbeitungsvorrichtung und Verfahren zur Oberflächenbearbeitung
CN109465737B (zh) * 2018-12-21 2023-10-03 湖州学院 一种抛光机
CN110405544A (zh) * 2019-08-29 2019-11-05 长春理工大学 一种基于磁性磨料的磨粒流精密研抛阀套的装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848363A (en) * 1973-02-20 1974-11-19 Minnesota Mining & Mfg Apparatus for treating objects with particles moved by magnetic force
JPS62120970A (ja) * 1985-11-15 1987-06-02 Kureha Chem Ind Co Ltd 磁気研磨装置
HU204217B (en) * 1989-03-16 1991-12-30 Gepipari Es Automatizalasi Mue Apparatus and method for polishing and burring shaft-like and tubular workpieces and/or precision-mechanical details of small size produced on alarge scale
US6231426B1 (en) * 2000-06-16 2001-05-15 Lu-Jung Liao Magnetic polishing machine

Also Published As

Publication number Publication date
ATE340052T1 (de) 2006-10-15
DE60308536T2 (de) 2007-06-06
AU2003263375A1 (en) 2004-03-19
WO2004020144A1 (fr) 2004-03-11
EP1545834A1 (fr) 2005-06-29
DE60308536D1 (de) 2006-11-02

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