EP1075897B1 - Lapping machine with two plates - Google Patents

Lapping machine with two plates Download PDF

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Publication number
EP1075897B1
EP1075897B1 EP20000113746 EP00113746A EP1075897B1 EP 1075897 B1 EP1075897 B1 EP 1075897B1 EP 20000113746 EP20000113746 EP 20000113746 EP 00113746 A EP00113746 A EP 00113746A EP 1075897 B1 EP1075897 B1 EP 1075897B1
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EP
European Patent Office
Prior art keywords
working
plate
axially parallel
shaft
grinding machine
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
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EP20000113746
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German (de)
French (fr)
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EP1075897A1 (en
Inventor
Volker Von Mackensen
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Peter Wolters Werkzeugmaschinen GmbH
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Peter Wolters Werkzeugmaschinen GmbH
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    • 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
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
    • B24B37/07—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool
    • B24B37/08—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for double side lapping
    • 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
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/11—Lapping tools
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
    • 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
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents

Definitions

  • the invention relates to a two-disc fine grinding machine according to the preamble of claim 1.
  • a machine is known from US 4 007 560 A.
  • a lapping or polishing machine with an upper and a lower working disk has become known, of which at least one of a drive is driven to rotate.
  • a plurality of carriers are arranged having openings for receiving workpieces and a toothing on the circumference, wherein the toothing with an inner and an outer pin ring is engaged for rotation and propulsion of the carriers, if at least one pin collar is set in rotation.
  • a source for the supply of flowable working fluid or lubricant is provided, which is registered between the work surfaces.
  • Outer and internal scavenging agents catch the agent exiting from the working gap on the inside and outside and lead it to a filtration system.
  • a switch may optionally connect the channels to a recycling tank or otherwise.
  • the invention has for its object to provide a two-disc grinding machine, in which the cost of the supply of the working fluid and the coolant is reduced and a simple recycling of the coolant is possible.
  • At least one radially sealed chamber is formed in the surface of the carrier disks facing the respective working disk, which chamber is connected to its working surfaces via axially parallel bores of the carrier disk.
  • at least one paraxial channel is provided which is connected to a source of cooling lubricant via a stationary supply device.
  • An open cooling circuit is provided, and the coolant is at the same time lubricant or working fluid. It is understood that provided a suitable cooling unit is to bring the coolant to a low temperature before it is fed to the work surfaces. The interception of the radially emerging from the gap between the working surfaces of cooling lubricant takes place in a trough below the lower working disk. The upper working disk is surrounded by a height-adjustable hood, which deflects the fluid emerging from the gap between the working disks to the collecting trough. The collected coolant fluid can be recycled or filtered before it is fed through the cooling unit again the work discs.
  • the active grinding zones are optimally cooled simultaneously at the top and bottom and thus also below the workpieces. Furthermore, the chips are optimally dissipated.
  • the measure according to the invention significantly increases the cutting performance and the service life of the grinding wheels.
  • the drive shafts have two or more axially parallel channels, which are connected to the feed device and offset in the circumferential direction of the chambers.
  • the axially parallel channels can be formed by means of a sleeve which is non-rotatably seated in the hollow drive shaft and has on the outside one or more axially parallel grooves which form the cooling channels.
  • the chambers in the carrier discs can via at least one connecting channel in the carrier disc via a radial bore in the drive shaft with the be connected axially parallel channels in the drive shaft.
  • the lower carrier disc has spokes which connect a hub with a support portion. The connecting channel may then be formed in one or more spokes.
  • the feed device to the drive shafts is provided according to a further embodiment of the invention with a surrounding the drive shaft stationary distributor ring on which at least one supply line is mounted. This is connected via a radial bore in the distributor ring with an axially parallel annular chamber which is formed between distributor ring and drive shaft. Via a radial bore in the drive shaft, the annular chamber is then connected to at least one axis-parallel channel in the drive shaft.
  • Fig. 1 is described in detail, but omitting the explanation of such parts in detail, which usually constitute components of grinding, lapping, polishing or other double-disc machines.
  • a machine housing 10 of the lapping kinematics fine grinding machine according to FIG. 1 has a lower part 12 and an upper part 14.
  • the upper part 14 is pivotable relative to the lower part 12 about a vertical axis.
  • the upper part has an upper grinding wheel 16 which is composed of a carrier disk 18 and a working disk 20 fixed thereto by screwing.
  • the grinding wheel 16 is oscillating, but non-rotatably suspended from an upper vertical drive shaft 22, on which a gear 24 is seated, which is driven in a manner not shown by a suitable drive for rotation of the grinding wheel 16.
  • the drive shaft 22nd surrounded by a stationary feeder 26, which will be discussed in more detail below.
  • the feed device 26 is connected to two lines 28, 30, via which a cooling lubricant liquid is supplied.
  • the source of cooling lubricant is not shown. It has a filter and cooling unit for cooling the liquid and a pump for generating a sufficient pressure.
  • the guidance of the cooling liquid to the grinding wheel 16 is effected by the hollow drive shaft 22 in a manner to be described below.
  • the carrier disc 18 has an oblique channel 32, which is in communication with a labyrinth 34 which contains a plurality of chambers for receiving the supplied cooling lubricant liquid.
  • the working disk 20 is provided with a pattern of axially parallel holes 36 through which liquid can escape to the work surface.
  • the grinding wheel 16 can be moved vertically by means not shown and described in the direction of a lower grinding wheel 40, which consists of a lower support plate 42 and a lower working disk 44.
  • the lower grinding wheel 40 is fixed in height but is rotated by a vertical drive shaft 46.
  • On the drive shaft 46 in turn sits a gear 48 which is driven by a drive motor, not shown.
  • a further supply device 50 is provided for cooling lubricant, which is in communication with two lines 52, 54. Lines 52, 54, like lines 28, 30, are connected to a source of cooled and filtered coolant. This may be identical to that for the lines 28, 30.
  • the supply of the cooling lubricant to the lower grinding wheel 40 via the hollow drive shaft 46 in a manner to be described.
  • the lower support plate 42 has a support portion 56 which is connected via a screw with the working disk 44, a hub 58 and spokes 60 between the hub 58 and support portion 56.
  • the support portion 56 in turn has a cooling labyrinth 62, similar to the cooling labyrinth 34th is formed and that is about a pattern of axially parallel through holes 64 in the working disk 44 with the facing work surface in combination.
  • the cold labyrinth 42 is connected via channels 66 in the spokes 60 to the supply in the drive shaft 46 in a manner which will be described below.
  • a ring 70 which is stationarily arranged and surrounds the drive shaft 22 and with a drive shaft surrounding and co-rotating with this sleeve 72 an annular chamber 74 which is connected via a radial bore 76 and 78 with the line 28 and 30 respectively ,
  • radial bores 80 and 82 are provided in the sleeve 72 and aligned in the shaft 22 .
  • the radial bores are connected to axially parallel channels 84 and 86, which are formed by a sleeve 88 which is non-rotatably seated within the hollow shaft 22.
  • annular body 90 is non-rotatably mounted on the shaft, which in turn is bolted to the support plate 18.
  • the ring body 90 has a first channel arrangement 92 and a second channel arrangement 94, which connect an axially parallel channel 84 and 86 with a channel 32 in the support plate 18 to initiate cooling lubricant into the labyrinth 34 at a plurality of circumferentially spaced locations.
  • the grinding wheel 16 is surrounded by a hood 96 which is mounted adjustable in height on the housing part 14. For adjustment, an adjusting cylinder 98 is used. As shown in FIG. 1, when the grinding wheel 16 is lowered toward the lower grinding wheel 40, the sidewall of the hood 96 extends downward beyond the working surface of the grinding wheel 16. This is indicated on the left in FIG. 1 by the dashed double line.
  • a designated 100 arrangement is used for measuring purposes during grinding, which will not be discussed further. It has a guided by the hollow shaft 22 rod which is led out of the shaft 22 at the upper end.
  • the feeder 50 has a feed ring 110 which stationary surrounds the lower end of the drive shaft 46 and with the two Lines 52, 54 is connected.
  • Radial bores 112, 114 communicate with an annular chamber 116 formed between the ring 50 and a bushing 118 seated on the shaft 46.
  • the sleeve 118 and the shaft 46 have aligned radial bores, which are in communication with axially parallel channels 120, 122 in the shaft 46. These are formed by axially parallel grooves of a sleeve 124 which is non-rotatably arranged in the hollow shaft 46.
  • annular chamber 116 is sealed by an upper and a lower lip seal, as well as the chamber 74 of the distributor 26 on the upper shaft 22.
  • a pressure respectively built up on the other side of the seals by air or a liquid under pressure maintains an improved seal and prevents the pressurized coolant from escaping.
  • the axially parallel channels 120, 122 are connected via upper radial bores in the shaft 46 with the channels 66 in the spokes 60 in connection, wherein the hub assembly 58 has connecting channels, which are not provided with reference numerals.
  • the cooling lubricant can therefore be fed into the cooling labyrinths 62 even when the grinding wheel 40 is rotating and exit from there via the bores 64 towards the working surface.
  • An inner pin collar 126 is driven via an inner shaft 128 within the shaft 46 via a toothed belt drive 130 driven by a motor 132.
  • an outer pin collar 134 is shown, which surrounds the grinding wheel 40 and may also be driven in rotation, which is not shown here. It is merely shown a lifting device 136, which, however, will not be described in detail and with the pin ring 134 is adjustable in height. This is especially true for lowering the pin collar 134 during loading and unloading of the workpieces.
  • the pin rings serve to drive the not shown, circumferentially toothed carriers.
  • a rod 138 in the inner shaft 128 with an upper plate 140 is another part of the measuring device shown in Fig. 2. This will not be discussed in detail.
  • the radially outwardly exiting coolant is collected by a sidewall 142, which surrounds the lower grinding wheel 40 like a trough.
  • the cooling lubricant is collected in a pan, then filtered, cooled and returned. Accordingly, the coolant lubricant exiting between the inner pin ring 126 and the inner edge of the grinding wheel 40 is also directed downwards and collected in a manner not shown so that it can be returned to the circuit.

Description

Die Erfindung bezieht sich auf eine Zweischeiben-Feinschleifmaschine nach dem Oberbegriff des Patentanspruchs 1. Eine solche Maschine ist aus US 4 007 560 A bekannt.The invention relates to a two-disc fine grinding machine according to the preamble of claim 1. Such a machine is known from US 4 007 560 A.

Aus DE 195 47 085 ist eine Läpp- oder Poliermaschine mit einer oberen und einer unteren Arbeitsscheibe bekannt geworden, von denen mindestens eine von einem Antrieb drehend angetrieben ist. Zwischen den Arbeitsflächen der unteren und oberen Arbeitsscheibe sind mehrere Läuferscheiben angeordnet, die Öffnungen zur Aufnahme von Werkstücken aufweisen sowie eine Zahnung am Umfang, wobei die Zahnung mit einem inneren und einem äußeren Stiftkranz in Eingriff ist zwecks Verdrehung und Vortrieb der Läuferscheiben, wenn mindestens ein Stiftkranz in Drehung versetzt wird. Ferner ist eine Quelle für die Zufuhr von fließfähigem Arbeitsmittel oder Schmiermittel vorgesehen, das zwischen die Arbeitsflächen eingetragen wird. Äußere und innere Abfangmittel fangen das innen und außen aus dem Arbeitsspalt austretende Mittel ab und führen es einer Filtrieranlage zu. Eine Weiche kann die Kanäle wahlweise mit einem Recyclingtank oder einem anderweitigen Ablauf verbinden.From DE 195 47 085 a lapping or polishing machine with an upper and a lower working disk has become known, of which at least one of a drive is driven to rotate. Between the working surfaces of the lower and upper working disk a plurality of carriers are arranged having openings for receiving workpieces and a toothing on the circumference, wherein the toothing with an inner and an outer pin ring is engaged for rotation and propulsion of the carriers, if at least one pin collar is set in rotation. Furthermore, a source for the supply of flowable working fluid or lubricant is provided, which is registered between the work surfaces. Outer and internal scavenging agents catch the agent exiting from the working gap on the inside and outside and lead it to a filtration system. A switch may optionally connect the channels to a recycling tank or otherwise.

Aus US 4,007,560A ist eine Zweischeiben-Schleifmaschine bekannt geworden mit oberer und unterer Arbeitsscheibe, die jeweils an einer Trägerscheibe befestigt sind. In der jeweiligen der Arbeitsscheibe zugekehrten Fläche der Trägerscheibe sind abgedichtet Kammern geformt, die mit Kühlmittel versorgt werden, und zwar über Zuführmittel in den die Arbeitsscheiben antreibenden Wellen. Die Kühlflüssigkeit wird mittels einer Pumpe den abgedichteten Kammern zugeführt bzw. von diesen abgezogen.From US 4,007,560A a two-disc grinding machine has become known with upper and lower working disk, which are each secured to a carrier disk. In each of the working disk facing surface of the support disk chambers are formed sealed, which are supplied with coolant, via supply means in the working disks driving shafts. The cooling liquid is supplied to the sealed chambers by means of a pump or withdrawn from these.

Aus DE 3 411 120A ist bekannt geworden, Kühlschmiermittel sowohl zu kühlen als auch als Arbeitsmittel für eine Läppvorrichtung einzusetzen. Das Fluid durchströmt Hohlräume der Läppscheibe und kann über Bohrungen in der Läppscheibe zur Arbeitsfläche fließen. Unterhalb der Läppscheibe ist ein Ringkanal angeordnet, in den das Kühlschmiermittel nach dem Verlassen der Kanäle in der Läppscheibe und der oberen Arbeitsfläche fließt. Es ist aus dieser Druckschrift ferner bekannt, das Kühlschmiermittel über eine Zuleitung in der Welle für die Läppscheibe zuzuführen.It has become known from DE 3 411 120A to cool cooling lubricants as well as to use them as working means for a lapping device. The fluid flows through cavities of the lapping disc and can flow through holes in the lapping disc to the work surface. Below the lapping disk, an annular channel is arranged, into which the cooling lubricant flows after leaving the channels in the lapping disk and the upper working surface. It is also known from this document to supply the cooling lubricant via a feed line in the shaft for the lapping disk.

Der Erfindung liegt die Aufgabe zugrunde, eine Zweischeiben-Schleifmaschine zu schaffen, bei der der Aufwand für die Zufuhr des Arbeitsmittels und des Kühlmittels verringert wird und ein einfaches Recycling des Kühlmittels ermöglicht ist.The invention has for its object to provide a two-disc grinding machine, in which the cost of the supply of the working fluid and the coolant is reduced and a simple recycling of the coolant is possible.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst.This object is solved by the features of patent claim 1.

Bei der erfindungsgemäßen Zweischeiben-Feinschleifmaschine, die normalerweise eine Läppkinematik hat, ist in der der jeweiligen Arbeitsscheibe zugekehrten Fläche der Trägerscheiben mindestens eine radial abgedichtete Kammer geformt, die über achsparallele Bohrungen der Trägerscheibe mit deren Arbeitsflächen verbunden ist. In jeder Welle ist mindestens ein achsparalleler Kanal vorgesehen, der mit einer Quelle für Kühlschmierflüssigkeit über eine stationäre Zuführvorrichtung verbunden ist.In the two-disc fine grinding machine according to the invention, which normally has a lapping kinematics, at least one radially sealed chamber is formed in the surface of the carrier disks facing the respective working disk, which chamber is connected to its working surfaces via axially parallel bores of the carrier disk. In each shaft, at least one paraxial channel is provided which is connected to a source of cooling lubricant via a stationary supply device.

Es wird ein offener Kühlkreislauf vorgesehen, und das Kühlmittel ist gleichzeitig Schmier- bzw. Arbeitsmittel. Es versteht sich, dass ein geeignetes Kühlaggregat vorgesehen ist, um das Kühlschmiermittel auf eine niedrige Temperatur zu bringen, bevor es den Arbeitsflächen zugeführt wird. Das Auffangen des radial aus dem Spalt zwischen den Arbeitsflächen austretenden Kühlschmiermittels erfolgt in einer Wanne unterhalb der unteren Arbeitsscheibe. Die obere Arbeitsscheibe ist von einer höhenverstellbaren Haube umgeben, welche das aus dem Spalt zwischen den Arbeitsscheiben austretende Fluid zur Auffangwanne hin ablenkt. Die aufgefangene Kühlschmierflüssigkeit kann recycelt bzw. gefiltert werden, bevor sie über das Kühlaggregat erneut den Arbeitsscheiben zugeführt wird. Mit Hilfe der erfindungsgemäßen Konstruktion ist sichergestellt, dass die aktiven Schleifzonen gleichzeitig oben und unten und somit auch unterhalb der Werkstücke optimal gekühlt werden. Ferner werden die Späne optimal abgeführt. Durch die erfindungsgemäße Maßnahme erhöhen sich die Zerspanleistung und die Standzeit der Schleifscheiben erheblich.An open cooling circuit is provided, and the coolant is at the same time lubricant or working fluid. It is understood that provided a suitable cooling unit is to bring the coolant to a low temperature before it is fed to the work surfaces. The interception of the radially emerging from the gap between the working surfaces of cooling lubricant takes place in a trough below the lower working disk. The upper working disk is surrounded by a height-adjustable hood, which deflects the fluid emerging from the gap between the working disks to the collecting trough. The collected coolant fluid can be recycled or filtered before it is fed through the cooling unit again the work discs. With the help of the construction according to the invention it is ensured that the active grinding zones are optimally cooled simultaneously at the top and bottom and thus also below the workpieces. Furthermore, the chips are optimally dissipated. The measure according to the invention significantly increases the cutting performance and the service life of the grinding wheels.

In einer Ausgestaltung der Erfindung ist vorgesehen, dass die Antriebswellen zwei oder mehr achsparallele Kanäle aufweisen, die mit der Zuführvorrichtung und mit in Umlaufrichtung versetzt angeordneten Stellen der Kammern verbunden sind. Die achsparallelen Kanäle können mit Hilfe einer Hülse gebildet werden, die drehfest in der hohlen Antriebswelle sitzt und an der Außenseite einen oder mehrere achsparallele Nuten aufweist, welche die Kühlkanäle bilden.In one embodiment of the invention, it is provided that the drive shafts have two or more axially parallel channels, which are connected to the feed device and offset in the circumferential direction of the chambers. The axially parallel channels can be formed by means of a sleeve which is non-rotatably seated in the hollow drive shaft and has on the outside one or more axially parallel grooves which form the cooling channels.

Die Kammern in den Trägerscheiben können über mindestens einen Verbindungskanal in der Trägerscheibe über eine radiale Bohrung in der Antriebswelle mit den achsparallelen Kanälen in der Antriebswelle verbunden sein. Nach einer anderen Ausgestaltung der Erfindung hat die untere Trägerscheibe Speichen, welche eine Nabe mit einem Tragabschnitt verbinden. Der Verbindungskanal kann dann in einer oder mehreren Speichen geformt sein.The chambers in the carrier discs can via at least one connecting channel in the carrier disc via a radial bore in the drive shaft with the be connected axially parallel channels in the drive shaft. According to another embodiment of the invention, the lower carrier disc has spokes which connect a hub with a support portion. The connecting channel may then be formed in one or more spokes.

Die Zuführvorrichtung an den Antriebswellen wird nach einer weiteren Ausgestaltung der Erfindung mit einem die Antriebswelle umgebenden stationären Verteilerring versehen, an dem mindestens eine Zuführleitung angebracht ist. Diese ist über eine radiale Bohrung im Verteilerring mit einer achsparallelen Ringkammer verbunden, die zwischen Verteilerring und Antriebswelle ausgebildet ist. Über eine radiale Bohrung in der Antriebswelle ist dann die Ringkammer mit mindestens einem achsparallelen Kanal in der Antriebswelle verbunden.The feed device to the drive shafts is provided according to a further embodiment of the invention with a surrounding the drive shaft stationary distributor ring on which at least one supply line is mounted. This is connected via a radial bore in the distributor ring with an axially parallel annular chamber which is formed between distributor ring and drive shaft. Via a radial bore in the drive shaft, the annular chamber is then connected to at least one axis-parallel channel in the drive shaft.

Die Erfindung wird nachfolgend anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.

Fig. 1
zeigt im Schnitt eine Feinschleifmaschine nach der Erfindung.
Fig. 2
zeigt vergrößert den oberen Teil der Maschine nach Fig. 1.
Fig. 3
zeigt vergrößert den unteren Teil der Maschine nach Fig. 1.
The invention will be explained in more detail with reference to an embodiment shown in the drawings.
Fig. 1
shows in section a fine grinding machine according to the invention.
Fig. 2
shows enlarged the upper part of the machine of FIG. 1st
Fig. 3
shows enlarged the lower part of the machine of FIG. 1st

Zunächst wird Fig. 1 näher beschrieben, wobei jedoch auf die Erläuterung solcher Teile im Detail verzichtet wird, die üblicherweise Bestandteile von Schleif-, Läpp-, Polier- oder sonstigen Zweischeibenmaschinen darstellen.First, Fig. 1 is described in detail, but omitting the explanation of such parts in detail, which usually constitute components of grinding, lapping, polishing or other double-disc machines.

Ein Maschinengehäuse 10 der Feinschleifmaschine mit Läppkinematik nach Fig. 1 weist einen unteren Teil 12 und einen oberen Teil 14 auf. Der obere Teil 14 ist gegenüber dem unteren Teil 12 um eine vertikale Achse verschwenkbar. Der obere Teil weist eine obere Schleifscheibe 16 auf, die sich aus einer Trägerscheibe 18 und einer daran durch Verschraubung befestigten Arbeitsscheibe 20 zusammensetzt. Die Schleifscheibe 16 ist pendelnd, jedoch drehfest an einer oberen vertikalen Antriebswelle 22 aufgehängt, auf der ein Zahnrad 24 sitzt, das auf nicht näher dargestellte Art und Weise von einem geeigneten Antrieb angetrieben ist zwecks Rotation der Schleifscheibe 16. Am oberen Ende ist die Antriebswelle 22 von einer stationären Zuführvorrichtung 26 umgeben, auf die weiter unten noch näher eingegangen wird. Die Zuführvorrichtung 26 ist mit zwei Leitungen 28, 30 verbunden, über die eine Kühlschmierflüssigkeit zugeführt wird. Die Quelle für Kühlschmierflüssigkeit ist nicht dargestellt. Sie weist ein Filter- und Kühlaggregat zur Kühlung der Flüssigkeit auf sowie eine Pumpe zur Erzeugung eines ausreichenden Druckes. Die Leitung der Kühlflüssigkeit zur Schleifscheibe 16 erfolgt durch die hohle Antriebswelle 22 auf weiter unten noch zu beschreibende Art und Weise. In Fig. 1 ist zu erkennen, daß die Trägerscheibe 18 einen schrägen Kanal 32 aufweist, der in Verbindung ist mit einem Labyrinth 34, das mehrere Kammern enthält zur Aufnahme der zugeführten Kühlschmierflüssigkeit. Die Arbeitsscheibe 20 ist mit einem Muster von achsparallelen Durchbohrungen 36 versehen, über die Flüssigkeit zur Arbeitsfläche austreten kann.A machine housing 10 of the lapping kinematics fine grinding machine according to FIG. 1 has a lower part 12 and an upper part 14. The upper part 14 is pivotable relative to the lower part 12 about a vertical axis. The upper part has an upper grinding wheel 16 which is composed of a carrier disk 18 and a working disk 20 fixed thereto by screwing. The grinding wheel 16 is oscillating, but non-rotatably suspended from an upper vertical drive shaft 22, on which a gear 24 is seated, which is driven in a manner not shown by a suitable drive for rotation of the grinding wheel 16. At the upper end, the drive shaft 22nd surrounded by a stationary feeder 26, which will be discussed in more detail below. The feed device 26 is connected to two lines 28, 30, via which a cooling lubricant liquid is supplied. The source of cooling lubricant is not shown. It has a filter and cooling unit for cooling the liquid and a pump for generating a sufficient pressure. The guidance of the cooling liquid to the grinding wheel 16 is effected by the hollow drive shaft 22 in a manner to be described below. In Fig. 1 it can be seen that the carrier disc 18 has an oblique channel 32, which is in communication with a labyrinth 34 which contains a plurality of chambers for receiving the supplied cooling lubricant liquid. The working disk 20 is provided with a pattern of axially parallel holes 36 through which liquid can escape to the work surface.

Die Schleifscheibe 16 kann mit Hilfe nicht näher dargestellter und beschriebener Mittel vertikal bewegt werden in Richtung einer unteren Schleifscheibe 40, die aus einer unteren Trägerscheibe 42 und einer unteren Arbeitsscheibe 44 besteht. Die untere Schleifscheibe 40 ist in der Höhe fest, wird jedoch über eine vertikale Antriebswelle 46 in Drehung versetzt. Auf der Antriebswelle 46 sitzt wiederum ein Zahnrad 48, das von einem nicht gezeigten Antriebsmotor antreibbar ist. Am unteren Ende der Antriebswelle 46 ist eine weitere Zuführvorrichtung 50 für Kühlschmiermittel vorgesehen, die mit zwei Leitungen 52, 54 in Verbindung steht. Die Leitungen 52, 54 sind wie die Leitungen 28, 30 mit einer Quelle für gekühltes und gefiltertes Kühlschmiermittel verbunden. Diese kann identisch mit der für die Leitungen 28, 30 sein. Die Zufuhr des Kühlschmiermittels zur unteren Schleifscheibe 40 erfolgt über die hohle Antriebswelle 46 auf eine noch zu beschreibende Art und Weise.The grinding wheel 16 can be moved vertically by means not shown and described in the direction of a lower grinding wheel 40, which consists of a lower support plate 42 and a lower working disk 44. The lower grinding wheel 40 is fixed in height but is rotated by a vertical drive shaft 46. On the drive shaft 46 in turn sits a gear 48 which is driven by a drive motor, not shown. At the lower end of the drive shaft 46, a further supply device 50 is provided for cooling lubricant, which is in communication with two lines 52, 54. Lines 52, 54, like lines 28, 30, are connected to a source of cooled and filtered coolant. This may be identical to that for the lines 28, 30. The supply of the cooling lubricant to the lower grinding wheel 40 via the hollow drive shaft 46 in a manner to be described.

Die untere Trägerscheibe 42 weist einen Tragabschnitt 56 auf, der über eine Verschraubung mit der Arbeitsscheibe 44 verbunden ist, eine Nabe 58 sowie Speichen 60 zwischen Nabe 58 und Tragabschnitt 56. Der Tragabschnitt 56 weist wiederum ein Kühllabyrinth 62 auf, das ähnliche wie das Kühllabyrinth 34 ausgebildet ist und das über ein Muster achsparalleler Durchbohrungen 64 in der Arbeitsscheibe 44 mit der zugekehrten Arbeitsfläche in Verbindung steht. Das Kühllabyrinth 42 ist über Kanäle 66 in den Speichen 60 mit der Zuführung in der Antriebswelle 46 verbunden auf eine Art und Weise, die weiter unten noch beschrieben wird.The lower support plate 42 has a support portion 56 which is connected via a screw with the working disk 44, a hub 58 and spokes 60 between the hub 58 and support portion 56. The support portion 56 in turn has a cooling labyrinth 62, similar to the cooling labyrinth 34th is formed and that is about a pattern of axially parallel through holes 64 in the working disk 44 with the facing work surface in combination. The cold labyrinth 42 is connected via channels 66 in the spokes 60 to the supply in the drive shaft 46 in a manner which will be described below.

Aus Fig. 2 geht die Zuführvorrichtung 26 für die Kühlschmierflüssigkeit zur oberen Schleifscheibe 16 deutlicher hervor. Man erkennt einen Ring 70, der stationär angeordnet ist und die Antriebswelle 22 umgibt und mit einer die Antriebswelle umgebenden und mit dieser mitdrehenden Buchse 72 eine Ringkammer 74 bildet, die über eine radiale Bohrung 76 bzw. 78 mit der Leitung 28 bzw. 30 verbunden ist. In der Buchse 72 und dazu ausgerichtet in der Welle 22 sind radiale Bohrungen 80 bzw. 82 vorgesehen. Die radialen Bohrungen sind verbunden mit achsparallelen Kanälen 84 bzw. 86, welche von einer Hülse 88 gebildet sind, die drehfest innerhalb der hohlen Welle 22 sitzt. Auf die Anbringung der Buchse 88 wird im einzelnen nicht eingegangen. Wie erkennbar, ist mithin jeweils ein achsparalleler Kanal in der Welle 22 mit einer Leitung 28 bzw. 30 verbunden. Es ist jedoch auch denkbar, mehr als zwei achsparallele Kanäle vorzusehen und mit der Ringkammer 74 zu verbinden.From Fig. 2, the feeding device 26 for the cooling lubricant liquid to the upper grinding wheel 16 is more apparent. It can be seen a ring 70 which is stationarily arranged and surrounds the drive shaft 22 and with a drive shaft surrounding and co-rotating with this sleeve 72 an annular chamber 74 which is connected via a radial bore 76 and 78 with the line 28 and 30 respectively , In the sleeve 72 and aligned in the shaft 22 radial bores 80 and 82 are provided. The radial bores are connected to axially parallel channels 84 and 86, which are formed by a sleeve 88 which is non-rotatably seated within the hollow shaft 22. On the attachment of the sleeve 88 is not discussed in detail. As can be seen, therefore, in each case an axis-parallel channel in the shaft 22 is connected to a line 28 and 30, respectively. However, it is also conceivable to provide more than two axially parallel channels and to connect with the annular chamber 74.

Am unteren Ende der Welle 22 sitzt ein Ringkörper drehfest auf der Welle, der seinerseits mit der Trägerscheibe 18 verschraubt ist. Der Ringkörper 90 weist eine erste Kanalanordnung 92 und eine zweite Kanalanordnung 94 auf, welche einen achsparallelen Kanal 84 bzw. 86 mit einem Kanal 32 in der Trägerscheibe 18 verbinden, um an mehreren in Umfangsrichtung beabstandeten Stellen Kühlschmiermittel in das Labyrinth 34 einzuleiten.At the lower end of the shaft 22, an annular body is non-rotatably mounted on the shaft, which in turn is bolted to the support plate 18. The ring body 90 has a first channel arrangement 92 and a second channel arrangement 94, which connect an axially parallel channel 84 and 86 with a channel 32 in the support plate 18 to initiate cooling lubricant into the labyrinth 34 at a plurality of circumferentially spaced locations.

Die Schleifscheibe 16 ist von einer Haube 96 umgeben, die höhenverstellbar am Gehäuseteil 14 angebracht ist. Zur Verstellung dient ein Verstellzylinder 98. Wie aus Fig. 1 hervorgeht, erstreckt sich die Seitenwand der Haube 96 über die Arbeitsfläche der Schleifscheibe 16 nach unten hinaus, wenn die Schleifscheibe 16 in Richtung unterer Schleifscheibe 40 abgesenkt wird. Dies ist in Fig. 1 links durch die gestrichelte Doppellinie angedeutet.The grinding wheel 16 is surrounded by a hood 96 which is mounted adjustable in height on the housing part 14. For adjustment, an adjusting cylinder 98 is used. As shown in FIG. 1, when the grinding wheel 16 is lowered toward the lower grinding wheel 40, the sidewall of the hood 96 extends downward beyond the working surface of the grinding wheel 16. This is indicated on the left in FIG. 1 by the dashed double line.

Eine mit 100 bezeichnete Anordnung dient Meßzwecken beim Schleifen, worauf nicht weiter eingegangen wird. Sie weist eine durch die hohle Welle 22 geführte Stange auf, die am oberen Ende aus der Welle 22 herausgeführt ist.A designated 100 arrangement is used for measuring purposes during grinding, which will not be discussed further. It has a guided by the hollow shaft 22 rod which is led out of the shaft 22 at the upper end.

Wie aus Fig. 3 zu erkennen, weist die Zuführvorrichtung 50 einen Zuführring 110 auf, der stationär das untere Ende der Antriebswelle 46 umgibt und der mit den beiden Leitungen 52, 54 verbunden ist. Radiale Bohrungen 112, 114 sind mit einer Ringkammer 116 in Verbindung, die zwischen dem Ring 50 und einer auf der Welle 46 sitzenden Buchse 118 gebildet ist. Die Buchse 118 und die Welle 46 weisen ausgerichtete radiale Bohrungen auf, die in Verbindung stehen mit achsparallelen Kanälen 120, 122 in der Welle 46. Diese werden gebildet durch achsparallele Nuten einer Hülse 124, die drehfest in der hohlen Welle 46 angeordnet ist. Wie erkennbar, ist die Ringkammer 116 durch eine obere und eine untere Lippendichtung abgedichtet, ebenso wie die Kammer 74 der Verteilvorrichtung 26 an der oberen Welle 22. Mit Hilfe eines jeweils auf der anderen Seite der Dichtungen aufgebauten Drucks durch Luft oder eine Flüssigkeit unter Druck wird eine verbesserte Abdichtung erhalten und verhindert, daß das unter Druck eingeleitete Kühlschmiermittel entweicht.As can be seen from Fig. 3, the feeder 50 has a feed ring 110 which stationary surrounds the lower end of the drive shaft 46 and with the two Lines 52, 54 is connected. Radial bores 112, 114 communicate with an annular chamber 116 formed between the ring 50 and a bushing 118 seated on the shaft 46. The sleeve 118 and the shaft 46 have aligned radial bores, which are in communication with axially parallel channels 120, 122 in the shaft 46. These are formed by axially parallel grooves of a sleeve 124 which is non-rotatably arranged in the hollow shaft 46. As can be seen, the annular chamber 116 is sealed by an upper and a lower lip seal, as well as the chamber 74 of the distributor 26 on the upper shaft 22. By means of a pressure respectively built up on the other side of the seals by air or a liquid under pressure maintains an improved seal and prevents the pressurized coolant from escaping.

Die achsparallelen Kanäle 120, 122 sind über obere radiale Bohrungen in der Welle 46 mit den Kanälen 66 in den Speichen 60 in Verbindung, wobei die Nabenanordnung 58 Verbindungskanäle aufweist, die jedoch nicht mit Bezugszeichen versehen sind. Das Kühlschmiermittel kann daher auch bei Drehung der Schleifscheibe 40 in die Kühllabyrinthe 62 eingespeist werden und von dort über die Bohrungen 64 zur Arbeitsfläche hin austreten.The axially parallel channels 120, 122 are connected via upper radial bores in the shaft 46 with the channels 66 in the spokes 60 in connection, wherein the hub assembly 58 has connecting channels, which are not provided with reference numerals. The cooling lubricant can therefore be fed into the cooling labyrinths 62 even when the grinding wheel 40 is rotating and exit from there via the bores 64 towards the working surface.

Ein innerer Stiftkranz 126 wird über eine Innenwelle 128 innerhalb der Welle 46 angetrieben, und zwar über einen Zahnriemenantrieb 130, der von einem Motor 132 angetrieben ist. Ferner ist ein äußerer Stiftkranz 134 gezeigt, der die Schleifscheibe 40 umgibt und ebenfalls drehend angetrieben sein kann, was hier jedoch nicht dargestellt ist. Es ist lediglich eine Hubvorrichtung 136 gezeigt, die jedoch im einzelnen nicht beschrieben werden soll und mit der der Stiftkranz 134 in der Höhe verstellbar ist. Dies gilt insbesondere zum Absenken des Stiftkranzes 134 beim Be- und Entladen der Werkstücke. Wie bekannt, dienen die Stiftkränze zum Antrieb der nicht gezeigten, am Umfang gezahnten Läuferscheiben.An inner pin collar 126 is driven via an inner shaft 128 within the shaft 46 via a toothed belt drive 130 driven by a motor 132. Further, an outer pin collar 134 is shown, which surrounds the grinding wheel 40 and may also be driven in rotation, which is not shown here. It is merely shown a lifting device 136, which, however, will not be described in detail and with the pin ring 134 is adjustable in height. This is especially true for lowering the pin collar 134 during loading and unloading of the workpieces. As is known, the pin rings serve to drive the not shown, circumferentially toothed carriers.

Eine Stange 138 in der inneren Welle 128 mit einem oberen Teller 140 ist ein weiteres Teil der in Fig. 2 dargestellten Meßvorrichtung. Auf diese wird im einzelnen nicht eingegangen.A rod 138 in the inner shaft 128 with an upper plate 140 is another part of the measuring device shown in Fig. 2. This will not be discussed in detail.

Das radial nach außen austretende Kühlschmiermittel wird durch eine Seitenwand 142, welche die untere Schleifscheibe 40 wannenartig umgibt, aufgefangen. Das Kühlschmiermittel wird in einer Wanne gesammelt, dann gefiltert sowie gekühlt und erneut zugeführt. Entsprechend wird auch das zwischen innerem Stiftkranz 126 und dem Innenrand der Schleifscheibe 40 austretende Kühlschmiermittel nach unten geleitet und auf nicht gezeigte Art und Weise aufgefangen, damit es dem Kreislauf wieder zugeführt werden kann.The radially outwardly exiting coolant is collected by a sidewall 142, which surrounds the lower grinding wheel 40 like a trough. The cooling lubricant is collected in a pan, then filtered, cooled and returned. Accordingly, the coolant lubricant exiting between the inner pin ring 126 and the inner edge of the grinding wheel 40 is also directed downwards and collected in a manner not shown so that it can be returned to the circuit.

Claims (6)

  1. A two-plate precision grinding machine, comprising:
    - a machine housing
    - an upper and a lower working plate (20, 44) which are mounted each on a carrier disk (18, 42), wherein at least one radially sealed chamber (34, 62) is formed in the surface of the carrier disk (18, 42) that faces the working plate (20,44),
    - an upper and a lower vertical working shaft (22, 46) for driving the working plates (20, 44) that are rotatably supported by means of roller bearings in the machine housing and are designed to be driven by a motor via gearing means, wherein each shaft (22, 46) has at least one channel (86, 88) parallel to the axis thereof,
    - each on the stationary supply device (26, 50) for a liquid cooling for each shaft (22, 46), and
    - a cooling device for the liquid coolant which feeds the supply devices with the liquid coolant by means of a pump,
    characterized in that the liquid coolant is a liquid cooling lubricant, the sealed chambers (34, 62) are connected to the working surfaces of the two working plates (20, 44) via bores (36, 84) which are axially parallel thereto, the lower working plate (44) is surrounded by a collection tray (142) and the upper working plate (20) is surrounded by a hood (996) which is adjustable in height, wherein a lateral wall of the hood (96), when in its lower position, projects downwardly beyond the working surface of the upper working plate (20).
  2. The two-plate precision grinding machine according to claim 1, characterized in that at least one of the working shafts (22, 46) has two or more channels (86, 88, 120. 122) which are axially parallel thereto and are connected to the supply device (26, 50) and circumferentially offset points of the chambers (34, 62).
  3. The two-plate precision grinding machine according to claim 1 or 2, characterized in that the chambers (34, 62), via at least one joining channel (32, 66) in the carrier disk (18, 42) and through a radial bore in the driving shaft (22, 46), are connected to the channel (86, 88, 120, 122) which is axially parallel thereto, in the driving shaft (22, 46).
  4. The two-plate precision grinding machine according to claim 3, characterized in that the lower carrier disk (42) has a carrying portion (52) connected to the working plate (44), a boss (58) seated on the driving shaft (46), and spokes (60) between the boss and carrying portion, and the joining channel (66) is passed through a spoke (60).
  5. The two-plate precision grinding machine according to any one of claim 1 to 4, characterized in that the supply device (26, 50) has a stationary distributor ring (70, 110) surrounding the driving shaft (22, 46) at a distance from the carrier disk, on which at least one supply line (28, 30, 52, 54) is mounted which, via a radial bore (76, 78, 112, 114) in the distributor ring, is connected to an annular chamber (74, 116) which is axially parallel thereto, between the distributor ring and driving shaft.
  6. The two-plate precision grinding machine according to any one of claim 1 to 5, characterized in that the hollow driving shaft (22, 46) has disposed therein a sleeve (88, 124) which has at least one groove which is axially parallel thereto, for forming the channel (86, 88, 120, 122) groove which is axially parallel thereto.
EP20000113746 1999-08-10 2000-06-29 Lapping machine with two plates Expired - Lifetime EP1075897B1 (en)

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DE1999137784 DE19937784B4 (en) 1999-08-10 1999-08-10 Two slices of fine grinding machine
DE19937784 1999-08-10

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DE50013453D1 (en) 2006-10-26
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EP1075897A1 (en) 2001-02-14

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