EP1259353B1 - Rectifieuse - Google Patents

Rectifieuse Download PDF

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Publication number
EP1259353B1
EP1259353B1 EP01909788A EP01909788A EP1259353B1 EP 1259353 B1 EP1259353 B1 EP 1259353B1 EP 01909788 A EP01909788 A EP 01909788A EP 01909788 A EP01909788 A EP 01909788A EP 1259353 B1 EP1259353 B1 EP 1259353B1
Authority
EP
European Patent Office
Prior art keywords
container
machine according
wall
border
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.)
Expired - Lifetime
Application number
EP01909788A
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German (de)
English (en)
Other versions
EP1259353A1 (fr
Inventor
Helmut Gegenheimer
Helmut Lutz
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.)
Otec Praezisionsfinish GmbH
Original Assignee
Otec Praezisionsfinish 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
Priority claimed from PCT/EP2000/001675 external-priority patent/WO2000056501A1/fr
Priority claimed from DE20005360U external-priority patent/DE20005360U1/de
Priority claimed from DE20009539U external-priority patent/DE20009539U1/de
Application filed by Otec Praezisionsfinish GmbH filed Critical Otec Praezisionsfinish GmbH
Priority to EP01909788A priority Critical patent/EP1259353B1/fr
Publication of EP1259353A1 publication Critical patent/EP1259353A1/fr
Application granted granted Critical
Publication of EP1259353B1 publication Critical patent/EP1259353B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • the invention relates to a device according to the preamble of Claim 1.
  • a device is known from GB 1446414 A known.
  • centrifugal vibratory finishing machines consisting of a two-part Tray with a cup-shaped rotatable, a bottom forming container bottom and a stationary cylindrical Container upper part consist.
  • Such grinding machines are used for surface treatment of grindings, for example smaller ones Parts and workpieces that come together with grinding wheels by doing Container is moved. If the lower part is rotated, so are the workpieces to be treated on the Plates moved outwards until they hit the inner wall of the Container hit, where they are braked.
  • nachströmende workpieces is a circumferential workpiece movement a, which is an intensive grinding or polishing machining causes.
  • centrifugal Gleitschleifmaschinene A disadvantage of such centrifugal Gleitschleifmaschinene is in particular, that the sealing of the annular gap and the Management of these limiting surfaces significant problems caused only with great effort and appropriate Costs can be overcome. There is a danger that upper and lower part, in particular the lower part, itself in consequence of friction very strongly heated, if parts of the Abrasive material and / or additionally added abrasive article during operation in the gap between tank bottom and rotating plate. This results on the one hand a relatively short life of the Grinding machine, on the other hand, this must during processing Of grit often be shut off to a Overheating of both the grinding machine and the To avoid grinding or polishing good.
  • the invention is based on the object, while avoiding the disadvantages mentioned a simply trained and to provide inexpensive device for polishing and grinding the reliable at a low susceptibility to wear works and has a long service life.
  • the finite distance or gap is in contrast to DE 197 28 931 A1 constructive by a radial dimen- sional measure of the turntable relative to the radial inner dimensions of Container determines and is therefore also at rest, in particular without the intervention of any external forces, given, as in the prior art by the between The plate and container wall pressed through liquid act.
  • the yielding, especially flexible, rim therefore does not touch at rest in the device By filled Good loaded Tellerrand the container wall Not.
  • the invention consciously accepts that Abrasive particles between the rim and container wall and also get between the plate bottom and tank bottom can.
  • the rim of the plate tapering to its free peripheral edge tipped to a point.
  • the plate edge in particular in its outer free edge area a high Be given flexibility.
  • Tellerrand is inclined outwards and to the horizontal one Slope of less than 90 °, preferably between 30 and 70 ° has.
  • the (inner) opening angle of the rim to the Horizontal is thus between 150 ° and 110 °.
  • the size of the gap or the finite distance of the plate edge to the container wall is preferably between 2 and 10% of the plate diameter and thus at usual plate diameters from 15 to 40 cm usually between 0.4 and 2 mm, preferably between 0.7 and 1 mm.
  • the thickness of the plate floor between about 2 and 8 ⁇ of its diameter or that the thickness of the turntable is between about 5 and 10 mm.
  • the plate also has a distance from the bottom of the container on.
  • the vertical distance is between 1 and 2 mm.
  • the Slit width may also be variable, in particular adjust the gap to the granules used. It can an adjustability of the gap by means of any known Means, for example through between tank bottom and Plate insertable washer or the like provided be, by means of which a container bottom passing through Shaft for storage of the flexible plate height adjustable and can be fixed at any height.
  • the container with respect to the plate height adjustable and be fixable at a desired height.
  • the Size of the gap between the rim and container wall smaller than the axial distance of the plate from the container bottom. This ensures that among the Turntable can only reach particles that are much smaller are as the distance of the turntable bottom of the tank bottom.
  • the Turntable made of plastic in particular made of polyurethane.
  • a preferred embodiment provides in that at least the inside of the container, preferably the entire container made of plastic, preferably made of Polyamide 6 (PA6) or polyamide 66 exists, with the Shore hardness the materials preferably between 50 and 95 ° should lie.
  • PA6 Polyamide 6
  • PA66 Polyamide 6
  • the invention further relates to a grinding system with a Device according to the invention for polishing and grinding of workpieces according to claim 1 and with an abrasive with organic Grain, in particular, the grain of the abrasive from natural organic material, such as whale or coconut shell, Wood, cherry stone or the like exists or Grain of the abrasive of synthetic-organic material, in particular of plastic.
  • the abrasive is preferably a composite abrasive having a central grain of organic material, containing from a polishing particles Binder layer is surrounded.
  • the polishing grain composite a central walnut grain, which can be replaced by a fat or Wax layer is included in the polishing grains in particular are embedded in aluminum oxide.
  • abrasives has to be used in a grinder with a polyamide 6 housing and in particular with a Polyurethane plate proved to be extremely optimal to on the one hand to achieve good grinding results and on the other both damage to the abrasive (workpiece) as well as from container wall and sanding pad as well as through otherwise occurring jamming and blockages of the Drive exposed.
  • the grain size of the abrasive can be between 50 and 500
  • a further preferred embodiment is characterized that underneath the plate in the bottom of the container a closable outlet is provided.
  • Another highly preferred embodiment provides a drive axle of the sanding pad is liquid-tight is guided through the bottom of the container.
  • the coupling piece and the Output shaft are non-rotatably by a radial clamping screw connected with each other.
  • the turntable and the coupling piece are rotatably connected to each other by means of screws. It is a dust and / or liquid-tight Carrying out the drive of the plate through the bottom of the plate Container provided, wherein the coupling piece in particular axially held firmly in containers by Simmerrings; This causes an optimal seal.
  • the housing is preferably in one piece, in particular the housing and / or the container is made of plastic. This allows the grinding machine according to the invention manufacture economical and thus inexpensive. To Also contributes that the transmission is arranged below the plate is.
  • the drive as a geared motor with Gear is formed, in which case in particular the engine with its axis aligned vertically and a drive shaft emerges at the bottom of the engine.
  • the device according to the invention or grinding unit can be used in a machine with low constructive effort, if necessary, several Be present grinding units, for example, the rational Machining of heavier and / or shock-sensitive To enable workpieces to be machined together several workpieces in a single container do not allow. It can even be very many units be provided, for example, more than 30. In this case the plates of each container either driven separately his or the grinding machine has a common Drive for all units on.
  • An inventive Grinding machine can be used in particular for dry polishing of jewelry, dental parts, etc. are used.
  • Fig. 1 shows a preferred embodiment of an inventive Device that is structurally simple is and therefore manufactured at low cost and can be offered inexpensively, so they are also in the Private area used to polish up private jewelery can be.
  • a centrifugal vibratory finishing machine in the form of a disk centrifugal machine has a container 2 with a rotatable turntable. 3 on.
  • the housing 2' here consists of polycaprolactam - with chains NH ('CH 2 ) 5 CO -, this being Material is usually also referred to as polyamide 6 or PA 6.
  • the container 2 is also formed in this material, and a grinding plate 3 is arranged in the container 2.
  • the turntable 3 is made of flexible material, such as relatively soft plastic or rubber and in particular polyurethane
  • the abrasive material is a polishing grain composite having a central grain of organic material with a wax or fat layer incorporated with polishing grains, and the organic material may be natural organic material such as walnut shell, cherry stone, wood, coconut shell or the like, or synthetic organic material how to be plastic.
  • the turntable 3 has an obliquely outwardly and upwardly drawn Peripheral edge 3a, the outer wall of the contour the container follows in this area, ie parallel to this runs.
  • Such is radially between plate 3 and Container bottom 2a a finite distance 5 of the size b of about 1.5 mm formed over the entire plate surface in the essentially the same size.
  • the plate and / or the container 2 may e.g. with variation of the gap width b be adjustable in height.
  • the pulled up Tellerrand 3a is a plate-shaped receptacle for the Grit created. Between the edge of the plate 3a and the Container wall 2b, a gap 5a is formed, the smaller. as the distance is 5 and has a width of about 0.8 mm.
  • the rotary drive 11 can be a Turntable 3 directly driving motor or a geared motor be with integrated transmission.
  • the rotary drive 11 has a vertically upward output shaft 12 on.
  • the rotary drive 11 is parallel to the shaft by means of 12 directed screw 13 via a mounting plate 14 fixed to the housing 2 '.
  • Coupling piece 15 In a hole of the Housing 2 'between foot 2a and container 2 is found Coupling piece 15, by means of which the turntable 3 with the Output shaft 12 of the drive 11 is rotatably connected.
  • the coupling piece 15 has holes 15a, 15b for this purpose.
  • In the bore 15a projects the output shaft 12 of the drive 11.
  • a radial clamping screw 16 provided for the non-rotatable connection is a radial clamping screw 16 provided.
  • In the hole 15b protrudes a centering pin 17 which is firmly connected to the turntable 3.
  • a non-rotatable Connection between the turntable 3 is parallel for centering pin 17 engaging in the coupling piece 15 Made
  • the axis A of turntable 3 and rotary drive 11 are aligned.
  • the bores 15a, 15b may also have a through bore be.
  • Below the coupling piece 15 is the output shaft 16 of the rotary drive 11 by a centering ring 19 surrounded.
  • In the upper part of the coupling is fixed connected to this a hardened ring 21.
  • coupling 15 is held by Simmerringe 22 axially in the housing 2 '.
  • the turntable 3 is, as I said, under formation of a Gap 5 spaced from the container bottom 2a.
  • FIGS. 2 and 3 show a further embodiment of the Invention in which the grinding machine according to the invention also structurally simple and thus inexpensive can be produced.
  • the housing 2 has a foot 2c on, but not in one piece with the container. 2 is trained.
  • the container 2 is rather still to be explained Way set on the foot 2c.
  • the figure 3 shows a motor 13 laterally of the container 2 and the foot 2c arranged such that the output shaft of the motor 13th (not shown) down to the engine 13th exit.
  • the transmission 12 is also below the engine 13, wherein the drive 11 also as a geared motor 14 may be formed.
  • the top of the engine 13 is essentially at the same height as the Top edge of the container 2.
  • a closable opening 15 is provided, on the optionally reached under the turntable 3 grinding material can be removed.
  • FIG. 4 shows a detailed view of the drawn upwards Peripheral edge 3a of the axis A in the container second rotatable turntable 3.
  • At least the peripheral edge 3a is made in the illustrated embodiment of a flexible Material with a Shore hardness of 50 to 95 °.
  • the Turntable itself or its bottom 3b may be made of the same Material or another material.
  • the container wall 2b in the area the peripheral edge 3a is flexible or elastic be.
  • the peripheral edge 3 a runs from the bottom portion 3 b of the plate 3 tapering to its free edge 3c.
  • the opening angle ⁇ of the peripheral edge 3a to the bottom 3b is shown in the Embodiment about 150 °.
  • the angle ⁇ between 3d bottom of the floor and outside 3e of the peripheral edge 3a is accordingly about 130 °.
  • the value for both angles ⁇ , ⁇ are preferably between 105 ° and 150 °.
  • the slope 8 of the inner wall of the container in the area the turntable and thus the outside of the peripheral edge of the turntable 3 is in each case to the horizontal usually between 30 ° and 70 ° and here 65 °.
  • the inner wall 2b of the container 2 With unloaded turntable 3, i. if this is neither rotates and centrifugal forces are exerted on the peripheral edge 3a nor the peripheral edge 3a in particular in the edge region 3c, the inner wall 2b of the container 2 not, but rather has this to a finite distance or gap 5 in the order of most preferably 0.4 to 2 mm on. Also between the bottom 3d of the turntable 3 and the top 2c of the bottom 2a of the container 2 is one Gap 5a or finite distance.
  • FIG. 5 Another preferred embodiment of the subject invention arises from the figure 5.
  • the angle ⁇ here is 55 ° in deviation from the above embodiments found at the bottom of the sloping Wall 2b of the container 2 a recess 2i, whose Height approximately by the strength of the bottom 3b of the turntable. 3 is determined.
  • the recess 2i is replaced by a horizontal Floor area 2j and a vertical wall area 2k limited.
  • abrasive 20 for grinding the workpieces 21 such as
  • jewelry rings preferably, as in Fig. 4 is indicated (workpieces and abrasives are only exemplified in a few examples; the container of Fig. 1 goes without saying for processing especially with an abrasive to a considerable Part (filled at least one third), a composite abrasive on the basis of walnut granules with a central Walnut grain 22 used that on the outside of a Greasy or waxy layer is surrounded in the abrasive polishing grains 24, in particular of silicate or oxide incorporated are.
  • the disc grinding machine 1 During operation of the disc grinding machine 1 according to the invention becomes the free edge 3c of the peripheral edge 3a of the sanding plate 3 by the centrifugal force and by the in the container filled abrasive material 20 and abrasive material (workpieces) 21 pressed against the wall 2b of the container 2, so that the entry of the walnut abrasive into the gaps 5, 6 is largely prevented.
  • the polishing grains are used on the one hand from. It creates dust and stripping particles, too by resinous wax and fat components, which also Form dust.
  • smaller dust and stripping particles can nevertheless between the plate edge 3a and container wall 2b pass and get under the container, taking part again due to the flexibility of the peripheral edge 3a (and possibly to a lesser extent the wall 3b) the forces acting on them as a result of the movement of the turntable Centrifugal forces again through the edge gap 5a in the processing space can be pressed. Partially they can be discharged through an outlet in the container bottom.

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  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (24)

  1. Dispositif pour meuler ou polir à sec des pièces au moyen d'un produit abrasif comportant un réceptacle (2) et un plateau rotatif (3) tournant par rapport à celui-ci et à son intérieur, disposé à une distance déterminée (5a) du fond (2a) du réceptacle (2) et présentant un rebord de plateau (3a) relevé, ayant par construction une distance déterminée (5) par rapport à la paroi intérieure (2b) adjacente du réceptacle (2), caractérisé en ce que le plateau rotatif (3) est sensiblement plan et disposé parallèle à la face supérieure du fond (2a) du réceptacle (2), en ce que les distances du plateau rotatif (3) par rapport au fond (2a) et à la paroi (2b) du réceptacle (2) sont sensiblement du même ordre de grandeur, en ce que le plateau rotatif (3) est réalisé dans un matériau flexible et en ce que dans la zone de passage entre le fond (2a) du réceptacle (2) et sa paroi (2b) est formé un intervalle grandissant vers le plateau (3).
  2. Dispositif selon la revendication 1, caractérisé en ce que la face extérieure du rebord (3a) du plateau présente une courbure (angle γ) inférieure à 90° par rapport à l'horizontale.
  3. Dispositif selon la revendication 2, caractérisé en ce que la courbure de la face extérieure du rebord (3a) du plateau par rapport à l'horizontale se situe entre 30° et 70°.
  4. Dispositif selon les revendications 1 et 2, caractérisé en ce que la face extérieure du rebord (3a) du plateau et la face interne (2b) du réceptacle (2) sont sensiblement parallèles l'une à l'autre.
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au niveau du bord supérieur extérieur du rebord (3a) du plateau, l'intervalle ou la fente (5) déterminé par rapport à la paroi intérieure (2b) du réceptacle est compris entre 2 et 10 % du diamètre du plateau (3).
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au niveau du bord supérieur extérieur du rebord (3a) du plateau, l'intervalle ou la fente (5) déterminé par rapport à la paroi intérieure (2b) du réceptacle est compris entre 0,4 et 2 mm du diamètre du plateau (3).
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rebord (3a) du plateau va en se rétrécissant vers son bord supérieur libre.
  8. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le fond (3b) du plateau est également réalisé dans un matériau souple.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'intervalle libre entre le bord (3a) du plateau et la paroi intérieure (2b) adjacente du réceptacle (2) est inférieure à une distance verticale entre la sous-face du fond (3b) du plateau et la face supérieure (2c) du fond (2a) du récipient.
  10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le fond (3b) du plateau rotatif (3) présente une épaisseur sensiblement constante.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le rebord (3a) du plateau présente une épaisseur inférieure à celle du fond (3b) du plateau.
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le fond (3b) du plateau est rétréci dans son périmètre extérieur (vers le rebord (3a) relevé du plateau).
  13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur du fond (3b) du plateau correspond à environ 2 à 8 % de son diamètre.
  14. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaisseur du plateau rotatif (3) est d'environ 5 à 10 mm.
  15. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'intervalle grandissant dans la zone de passage du fond (2a) du réceptacle (2) vers sa paroi (2b) est réalisé sous la forme d'une encoche (2i) dans le contour de la paroi (2b) du réceptacle vers le fond (2a) du réceptacle.
  16. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le plateau rotatif (3) est en matière plastique, en particulier en polyuréthane.
  17. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins la face interne du réceptacle, de préférence l'ensemble du réceptacle, est en matière plastique, de préférence en polyamide 6 (PA6) ou en polyamide 66.
  18. Dispositif selon la revendication 16 ou 17, caractérisé en ce que les zones flexibles du plateau (3), en particulier du rebord (3a) du plateau, sont revêtues de ou consistent en un matériau ayant une dureté Shore de 50 à 95°.
  19. Dispositif selon la revendication 17 ou 18, caractérisé en ce qu'au moins la paroi intérieure du réceptacle (2), de préférence l'ensemble du réceptacle, est en polycaprolactame.
  20. Ensemble de meulage comprenant un dispositif pour meuler ou polir à sec des pièces au moyen d'un produit abrasif comportant un réceptacle (2) et un plateau rotatif (3) tournant par rapport à celui-ci et à son intérieur, disposé à une distance déterminée (5a) du fond (2a) du réceptacle (2) et présentant un rebord de plateau (3a) relevé, ayant par construction une distance déterminée (5) par rapport à la paroi intérieure (2b) adjacente du réceptacle (2), selon l'une quelconque des revendications précédentes, caractérisé en ce que les distances du réceptacle (2) au fond (2a) et à la paroi (2b) du réceptacle (2) sont sensiblement du même ordre de grandeur et en ce que l'on utilise un produit abrasif à grain organique.
  21. Ensemble de meulage selon la revendication 20, caractérisé en ce que le grain du produit abrasif consiste en un matériau organique naturel tel que l'écale de noix ou de noix de coco, le bois, le noyau de cerise ou similaire.
  22. Ensemble de meulage selon la revendication 21, caractérisé en ce que le grain du produit abrasif consiste en un matériau organo-synthétique, en particulier en matière plastique.
  23. Ensemble de meulage selon l'une quelconque des revendications 21 à 22, caractérisé en ce que le produit abrasif est un produit abrasif composite présentant un grain central en matériau organique entouré d'une couche de liant comprenant des parties polissantes.
  24. Ensemble de meulage selon l'une quelconque des revendications 21 à 23, caractérisé par une granulométrie du produit abrasif située entre 500 et 50.
EP01909788A 2000-02-29 2001-02-23 Rectifieuse Expired - Lifetime EP1259353B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01909788A EP1259353B1 (fr) 2000-02-29 2001-02-23 Rectifieuse

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
WOPCT/EP00/01675 2000-02-29
PCT/EP2000/001675 WO2000056501A1 (fr) 1999-03-19 2000-02-29 Rectifieuse
DE20005360U 2000-03-23
DE20005360U DE20005360U1 (de) 2000-02-29 2000-03-23 Schleifmaschine
DE20009539U 2000-05-26
DE20009539U DE20009539U1 (de) 2000-05-26 2000-05-26 Vorrichtung zum Schleifen von Schleifgut
PCT/EP2001/002068 WO2001064394A1 (fr) 2000-02-29 2001-02-23 Rectifieuse
EP01909788A EP1259353B1 (fr) 2000-02-29 2001-02-23 Rectifieuse

Publications (2)

Publication Number Publication Date
EP1259353A1 EP1259353A1 (fr) 2002-11-27
EP1259353B1 true EP1259353B1 (fr) 2005-05-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01909788A Expired - Lifetime EP1259353B1 (fr) 2000-02-29 2001-02-23 Rectifieuse

Country Status (1)

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EP (1) EP1259353B1 (fr)

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