EP3254806A1 - Method for producing a dressing tool for a grinding tool - Google Patents

Method for producing a dressing tool for a grinding tool Download PDF

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Publication number
EP3254806A1
EP3254806A1 EP17000868.4A EP17000868A EP3254806A1 EP 3254806 A1 EP3254806 A1 EP 3254806A1 EP 17000868 A EP17000868 A EP 17000868A EP 3254806 A1 EP3254806 A1 EP 3254806A1
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EP
European Patent Office
Prior art keywords
dressing tool
recesses
rings
support element
tool
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
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EP17000868.4A
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German (de)
French (fr)
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EP3254806B1 (en
Inventor
Friedrich Schmück
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Niles Werkzeugmaschinen GmbH
Kapp Werkzeugmaschinen GmbH
Original Assignee
Niles Werkzeugmaschinen GmbH
Kapp Werkzeugmaschinen GmbH
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Publication of EP3254806A1 publication Critical patent/EP3254806A1/en
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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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/075—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/08—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like
    • B24B53/085—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels controlled by information means, e.g. patterns, templets, punched tapes or the like for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/12—Dressing tools; Holders therefor
    • B24B53/14—Dressing tools equipped with rotary rollers or cutters; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B24D18/0018—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by electrolytic deposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for

Definitions

  • the invention relates to a method for producing a dressing tool for a grinding tool, preferably for a grinding worm, wherein the dressing tool has at least one, preferably annular, radially extending projection.
  • a dressable multi-start grinding worm is generally used.
  • the dressing of the grinding worm is again done with a single or multi-grooved dressing roller.
  • the present invention relates to a method for producing such a dressing tool. Preference is given to multi-section solid profile rollers, which can be used for the efficient dressing of grinding worms.
  • a mold ring is produced by another method, with the workpiece-specific Profile is provided.
  • a diamond or nickel layer is deposited on this profile in a galvanic process, which - after being glued to a core - ultimately results in the abovementioned dressing tool after various further process steps.
  • the manufacturing process is very complex. Often, for the production of the diamond or nickel layer of the mold ring is up to three weeks in a galvanic bath.
  • the profile of the dressing tool thus produced sometimes has errors that can be attributed to various causes.
  • the outer flanks of the profile "fold" outward, which is attributed to stresses in the structure.
  • thermal stresses are noticeable, which lead to errors in the profile.
  • the invention is therefore the object of a generic method in such a way that the profile of the dressing tool produced as well as the ideal contour corresponds; thus profile defects are to be eliminated on the dressing tool.
  • it should be ensured that the deformation of the nickel layer remains as low as possible. Accordingly, the dressing tool should have a precise geometry.
  • an open grid structure with openings is preferably used as the support element, so that the radially inner surface is not radially closed by the support element. Rather, therefore, the replacement of the electrolyte required for the production of the coating by the support element is not or hardly hindered.
  • the support element preferably extends over a width which corresponds to between 90% and 100% of the width of the dressing tool.
  • a structure which has a number of rings which extend in the circumferential direction of the radially inner surface, wherein the rings are interconnected by means of transverse struts, wherein the transverse struts extend in the axial direction of the dressing tool.
  • the rings and / or the transverse struts are preferably made of metal.
  • the rings and / or the transverse struts preferably have a circular cross-section. In this respect, a wire with a circular cross-section can be used as a base material for the production of the support element.
  • the number of rings preferably results from the number of projections plus one. In this case, therefore, there is a ring on both sides of each recess of the mold ring.
  • the rings and the cross struts can be materially connected to each other before their use or prior to introduction into the mold ring; this is in particular intended for welding or soldering.
  • the mold ring can at least temporarily rotate about its axis during the implementation of the above step c). It can thereby be ensured that the abrasive material (in particular the diamond powder) is retained by the centrifugal force in the recesses of the molding ring until it is fixed to the surface of the recess by the (in particular galvanic) coating process.
  • the abrasive material in particular the diamond powder
  • the removal of the molding ring according to the above step d) is preferably carried out by machining, in particular by twisting, the molding ring.
  • one aspect of the present invention is to incorporate a brace (i.e., the support member) into the forming nickel layer during the preferably electroplated coating process.
  • This brace counteracts possible deformation and prevents it.
  • a galvanic coating electrochemical deposition, "galvanic nickel”
  • a chemical coating can also be provided (“chemically nickel”).
  • various coating materials are possible, with nickel being preferred.
  • the material of the support element is chosen so that it can be easily introduced into the nickel layer and thereby deformed as little as possible. It is ensured that the deposited galvanic layer can not deform.
  • the support element is galvanically connected to the previously already applied (as part of a first fixation of the abrasive material in the mold ring) galvanic layer already containing the abrasive body.
  • the configuration of the support element is chosen so that it counteracts an optionally acting deformation stress.
  • the support element is designed or designed so that a uniform deposition of the galvanic layer can be achieved even after the introduction of the support element.
  • the support element may not form a shield by name; the replacement of the electrolyte must be ensured.
  • the support element may be introduced before or after the diamondizing (that is, before or after the introduction of the abrasive material on the surface of the above-mentioned recesses).
  • the support member In the proposed embodiment of the support member is ensured that the support element during galvanizing causes no change in the grain density (number of grains on the surface) and no grain imperfections.
  • the proposed invention is used in particular in solid profile rollers or in the galvanic negative coating.
  • a dressing tool 1 is shown in the form of a dressing roller.
  • the dressing tool 1 consists of a rotationally symmetrical component which has an axial direction a and a radial direction r. In the axial direction, the dressing tool 1 has a width B.
  • the dressing tool 1 has three ring-shaped, circumferentially extending projections 2, which extend in the radial direction r. These projections 2 are provided with abrasive material 6 in the form of diamond powder (corresponding grain size, depending on the grinding tool to be dressed), so that a grinding worm can be dressed with the dressing tool 1. This method is known as such and need not be explained here.
  • FIG. 2 The production of such a dressing tool 1 is in FIG. 2 illustrated.
  • Central element for the production is a mold ring 3, which has a substantially hollow cylindrical shape.
  • recesses 5 are incorporated (ie ground in with high accuracy), which are congruent (congruent) formed with the projections 2 (negative method).
  • the abrasive material 6 (diamond powder) is initially placed in the production of the dressing tool 1, so that the surface 8 of the recesses 5 is at least partially covered or occupied by this abrasive material 6.
  • FIG. 2 is a state to see, in which the galvanic coating process is already largely completed, ie the area of the recesses 5 has already filled with the material of the coating and beyond detected a radially inward reaching area.
  • a support element 9 was introduced into the mold ring 3, which was at least partially integrated by the galvanic coating process in the forming dressing tool 1.
  • FIG. 2 It can be seen that the support element 9 has been completely integrated into the coating material, ie surrounded by it. Thus, therefore, the support member is materially connected to the resulting dressing tool 1. However, it is also possible that after completion of the coating process, the support element 9 is not completely surrounded by the coating material.
  • the mold ring 3 is removed, which can be done by a machining operation.
  • the dressing tool 1 is available for its intended use.
  • the coming to use support elements 9 can be seen again in a perspective view.
  • the support element 9 has a width b which corresponds substantially to the width of the dressing tool 1 or is slightly smaller than said width B.
  • the support element 9 consists of several (in the embodiment: four) rings 11, which are connected by equidistantly distributed over the circumference arranged transverse struts 12 (in particular: soldered). Preferably, 20 to 80 transverse struts 12 are circumferentially.
  • openings 10 that allow it during the coating process electrolyte can pass through the support member 9 and thus is not or hardly hindered by the support member 9 of the electroplating process.
  • the support element 9 (or support grid) designed as a lattice-shaped structure of longitudinal and transverse struts, which is stretched in the mold ring.
  • the dimensions of the grid structure are adapted to the contour to be supported.
  • the support element is thereby positioned in the mold ring, that the total width of the grooves (recesses) is covered and the support element is completely embedded in the nickel layer.
  • the coating 7 can be carried out in a finally desired extent in a second workstation. Before this occurs, however, the support element 9 is introduced into the mold ring 3 and integrally bonded by the coating process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zum Herstellen eines Abrichtwerkzeugs (1) für ein Schleifwerkzeug, vorzugsweise für eine Schleifschnecke, wobei das Abrichtwerkzeug (1) mindestens einen, vorzugsweise ringförmig ausgebildeten, sich radial (r) erstreckenden Vorsprung (2) aufweist. Um eine präzise Geometrie des Abrichtwerkzeugs zu erhalten, sieht die Erfindung vor, dass das Verfahren die Schritte aufweist: a) Herstellung eines Formrings (3), der an einer radial innenliegenden Fläche (4) eine der Anzahl der Vorsprünge (2) entsprechende Anzahl Ausnehmungen (5) aufweist, die kongruent zu den Vorsprüngen (2) ausgebildet sind; b) Platzieren eines Abrasivmaterials (6), insbesondere von Diamantpulver, in den Ausnehmungen (5); c) Erzeugung einer chemischen oder elektro-chemischen Beschichtung (7) in den Ausnehmungen (5), so dass das Abrasivmaterial (6) im Bereich der Oberfläche (8) der Ausnehmungen (5) fixiert wird; d) Entfernung des Formrings (3), um das so entstandene Abrichtwerkzeug (1) zu erhalten; wobei vor oder während Schritt b) oder vor oder während Schritt c) im Bereich der radial innenliegenden Fläche (4) ein Stützelement (9) platziert wird, das während Schritt c) zumindest teilweise durch die Beschichtung (7) stoffschlüssig mit dem entstehenden Abrichtwerkzeug (1) verbunden wird.The invention relates to a method for producing a dressing tool (1) for a grinding tool, preferably for a grinding worm, wherein the dressing tool (1) has at least one, preferably annular, radially extending projection (2). In order to obtain a precise geometry of the dressing tool, the invention provides that the method comprises the steps of: a) producing a molding ring (3) having on a radially inner surface (4) a number of recesses corresponding to the number of projections (2) (5) formed congruent with the projections (2); b) placing an abrasive material (6), in particular diamond powder, in the recesses (5); c) generating a chemical or electrochemical coating (7) in the recesses (5), so that the abrasive material (6) is fixed in the region of the surface (8) of the recesses (5); d) removal of the mold ring (3) to obtain the resulting dressing tool (1); wherein before or during step b) or before or during step c) in the region of the radially inner surface (4) a support element (9) is placed, which during step c) at least partially by the coating (7) cohesively with the resulting dressing tool ( 1) is connected.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Abrichtwerkzeugs für ein Schleifwerkzeug, vorzugsweise für eine Schleifschnecke, wobei das Abrichtwerkzeug mindestens einen, vorzugsweise ringförmig ausgebildeten, sich radial erstreckenden Vorsprung aufweist.The invention relates to a method for producing a dressing tool for a grinding tool, preferably for a grinding worm, wherein the dressing tool has at least one, preferably annular, radially extending projection.

Bei der Bearbeitung insbesondere von Verzahnungen mit wälzenden Werkzeugen wird in der Regel eine abrichtbare mehrgängige Schleifschnecke eingesetzt. Das Abrichten der Schleifschnecke geschieht wiederum mit einer ein- oder mehrrilligen Abrichtrolle. Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines solchen Abrichtwerkzeugs. Bevorzugt sind hierbei mehrrillige Vollprofilrollen vorgesehen, die zum effizienten Abrichten von Schleifschnecken eingesetzt werden können.When machining gear teeth with rolling tools in particular, a dressable multi-start grinding worm is generally used. The dressing of the grinding worm is again done with a single or multi-grooved dressing roller. The present invention relates to a method for producing such a dressing tool. Preference is given to multi-section solid profile rollers, which can be used for the efficient dressing of grinding worms.

Ein gattungsgemäßes Verfahren ist in der DE 101 56 661 A1 beschrieben. Ein ähnliches Verfahren offenbart die JP H04 244 377 A . Andere Lösungen zeigen die US 2002/0182401 A1 und die US 2014/0273773 A1 . A generic method is in the DE 101 56 661 A1 described. A similar method discloses the JP H04 244 377 A , Other solutions show that US 2002/0182401 A1 and the US 2014/0273773 A1 ,

Um eine solche gattungsgemäße Vollprofilrolle herzustellen, wird nach einem anderen Verfahren ein Formring hergestellt, der mit dem werkstückspezifischen Profil versehen ist. Auf diesem Profil scheidet sich zumeist in einem galvanischen Prozess eine Diamant- bzw. Nickelschicht ab, die - auf einen Kern geklebt - nach diversen weiteren Prozessschritten letztlich das eingangs genannte Abrichtwerkzeug ergibt.To produce such a generic solid profile roll, a mold ring is produced by another method, with the workpiece-specific Profile is provided. In most cases, a diamond or nickel layer is deposited on this profile in a galvanic process, which - after being glued to a core - ultimately results in the abovementioned dressing tool after various further process steps.

Der Herstellungsprozess ist dabei sehr aufwändig. Häufig befindet sich bereits für die Erzeugung der Diamant- bzw. Nickelschicht der Formring bis zu drei Wochen in einem galvanischen Bad.The manufacturing process is very complex. Often, for the production of the diamond or nickel layer of the mold ring is up to three weeks in a galvanic bath.

Dabei hat sich ergeben, dass das so erzeugte Profil des Abrichtwerkzeugs mitunter Fehler aufweist, die auf diverse Ursachen zurückgeführt werden können. Namentlich "klappen" die äußeren Flanken des Profils nach außen weg, was auf Spannungen im Gefüge zurückgeführt wird. Weiterhin machen sich auch thermische Spannungen bemerkbar, die zu Fehlern im Profil führen.It has been found that the profile of the dressing tool thus produced sometimes has errors that can be attributed to various causes. In particular, the outer flanks of the profile "fold" outward, which is attributed to stresses in the structure. Furthermore, also thermal stresses are noticeable, which lead to errors in the profile.

Somit ergibt sich, dass durch Verformungen der Nickelschicht, insbesondere hervorgerufen durch innere Spannungen und mechanische Belastung, die Genauigkeit des Profils beeinträchtigt wird. In nachteilhafter Weise ist somit vor der Verwendung des Abrichtwerkzeugs eine entsprechende Nacharbeit notwendig, um die Fehler zu eliminieren.Thus, it results that deformations of the nickel layer, in particular caused by internal stresses and mechanical stress, the accuracy of the profile is impaired. Disadvantageously, a corresponding rework is thus necessary before the use of the dressing tool in order to eliminate the errors.

Der Erfindung liegt daher die Aufgabe zugrunde, ein gattungsgemäßes Verfahren so auszubilden, dass das Profil des hergestellten Abrichtwerkzeugs möglichst gut der idealen Kontur entspricht; somit sollen Profilfehler am Abrichtwerkzeug eliminiert werden. Insbesondere soll sichergestellt werden, dass die Verformung der Nickelschicht möglichst gering bleibt. Demgemäß soll das Abrichtwerkzeug eine möglichst präzise Geometrie haben.The invention is therefore the object of a generic method in such a way that the profile of the dressing tool produced as well as the ideal contour corresponds; thus profile defects are to be eliminated on the dressing tool. In particular, it should be ensured that the deformation of the nickel layer remains as low as possible. Accordingly, the dressing tool should have a precise geometry.

Die Lösung dieser Aufgabe durch die Erfindung sieht ein Verfahren vor, das die Schritte aufweist:

  1. a) Herstellung eines Formrings, der an einer radial innenliegenden Fläche eine der Anzahl der Vorsprünge entsprechende Anzahl Ausnehmungen aufweist, die kongruent zu den Vorsprüngen ausgebildet sind;
  2. b) Platzieren eines Abrasivmaterials, insbesondere von Diamantpulver, in den Ausnehmungen;
  3. c) Erzeugung einer chemischen oder elektro-chemischen Beschichtung in den Ausnehmungen, so dass das Abrasivmaterial im Bereich der Oberfläche der Ausnehmungen fixiert wird;
  4. d) Entfernung des Formrings, um das so entstandene Abrichtwerkzeug zu erhalten;
wobei vor oder während Schritt b) oder vor oder während Schritt c) im Bereich der radial innenliegenden Fläche ein Stützelement platziert wird, das während Schritt c) zumindest teilweise durch die Beschichtung stoffschlüssig mit dem entstehenden Abrichtwerkzeug verbunden wird.The solution of this object by the invention provides a method comprising the steps:
  1. a) production of a mold ring having on a radially inner surface of a number of projections corresponding number of recesses, which are formed congruent to the projections;
  2. b) placing an abrasive material, in particular diamond powder, in the recesses;
  3. c) generating a chemical or electro-chemical coating in the recesses, so that the abrasive material is fixed in the region of the surface of the recesses;
  4. d) removal of the mold ring to obtain the resulting dressing tool;
wherein before or during step b) or before or during step c) in the region of the radially inner surface, a support element is placed, which is connected during step c) at least partially by the coating cohesively with the resulting dressing tool.

Als Stützelement wird dabei bevorzugt eine offene Gitterstruktur mit Öffnungen verwendet, so dass die radial innenliegende Fläche nicht durch das Stützelement radial verschlossen wird. Vielmehr wird somit der Austausch des für die Herstellung der Beschichtung benötigten Elektrolyts durch das Stützelement nicht bzw. kaum behindert.In this case, an open grid structure with openings is preferably used as the support element, so that the radially inner surface is not radially closed by the support element. Rather, therefore, the replacement of the electrolyte required for the production of the coating by the support element is not or hardly hindered.

Das Stützelement erstreckt sich dabei bevorzugt über eine Breite, die zwischen 90 % und 100 % der Breite des Abrichtwerkzeugs entspricht.The support element preferably extends over a width which corresponds to between 90% and 100% of the width of the dressing tool.

Als Stützelement wird vorzugsweise eine Struktur verwendet, die eine Anzahl Ringe aufweist, die in Umfangsrichtung der radial innenliegenden Fläche verlaufen, wobei die Ringe mittels Querstreben miteinander verbunden sind, wobei die Querstreben in Achsrichtung des Abrichtwerkzeugs verlaufen. Die Ringe und/oder die Querstreben bestehen dabei bevorzugt aus Metall. Die Ringe und/oder die Querstreben weisen bevorzugt einen kreisförmigen Querschnitt auf. Insofern kann ein Draht mit kreisförmigem Querschnitt als Basismaterial für die Herstellung des Stützelements verwendet werden.As a support member preferably a structure is used which has a number of rings which extend in the circumferential direction of the radially inner surface, wherein the rings are interconnected by means of transverse struts, wherein the transverse struts extend in the axial direction of the dressing tool. The rings and / or the transverse struts are preferably made of metal. The rings and / or the transverse struts preferably have a circular cross-section. In this respect, a wire with a circular cross-section can be used as a base material for the production of the support element.

Die Anzahl der Ringe ergibt sich bevorzugt aus der Anzahl der Vorsprünge plus Eins. In diesem Falle befindet sich also ein Ring jeweils an beiden Seiten jeder Ausnehmung des Formrings.The number of rings preferably results from the number of projections plus one. In this case, therefore, there is a ring on both sides of each recess of the mold ring.

Die Ringe und die Querstreben können vor ihrer Verwendung bzw. vor dem Einbringen in den Formring miteinander stoffschlüssig verbunden werden; hierbei ist insbesondere an eine Verschweißung oder Verlötung gedacht.The rings and the cross struts can be materially connected to each other before their use or prior to introduction into the mold ring; this is in particular intended for welding or soldering.

Der Formring kann während der Durchführung des obigen Schritts c) zumindest zeitweise um seine Achse rotieren. Damit kann bewirkt werden, dass das Abrasivmaterial (insbesondere das Diamantpulver) durch die Zentrifugalkraft so lange in den Ausnehmungen des Formrings gehalten wird, bis es durch den (insbesondere galvanischen) Beschichtungsvorgang an der Oberfläche der Ausnehmung fixiert ist.The mold ring can at least temporarily rotate about its axis during the implementation of the above step c). It can thereby be ensured that the abrasive material (in particular the diamond powder) is retained by the centrifugal force in the recesses of the molding ring until it is fixed to the surface of the recess by the (in particular galvanic) coating process.

Die Entfernung des Formrings gemäß obigem Schritt d) erfolgt bevorzugt durch Zerspanen, insbesondere durch Abdrehen, des Formrings.The removal of the molding ring according to the above step d) is preferably carried out by machining, in particular by twisting, the molding ring.

Ein Aspekt der vorliegenden Erfindung besteht also darin, während des vorzugsweise galvanisch durchgeführten Beschichtungsprozesses eine Verstrebung (d. h. das Stützelement) in die sich bildende Nickelschicht einzubringen. Diese Verstrebung wirkt einer möglichen Verformung entgegen und verhindert diese. Wie erwähnt, ist eine galvanische Beschichtung (elektrochemische Abscheidung; "galvanisch Nickel") bevorzugt. Generell kann allerdings auch eine chemische Beschichtung vorgesehen werden ("chemisch Nickel"). Auch sind natürlich verschiedene Beschichtungsmaterialien möglich, wobei Nickel bevorzugt ist.Thus, one aspect of the present invention is to incorporate a brace (i.e., the support member) into the forming nickel layer during the preferably electroplated coating process. This brace counteracts possible deformation and prevents it. As mentioned, a galvanic coating (electrochemical deposition, "galvanic nickel") is preferred. In general, however, a chemical coating can also be provided ("chemically nickel"). Of course, various coating materials are possible, with nickel being preferred.

Das Material des Stützelements wird dabei so gewählt, dass es problemlos in die Nickelschicht eingebracht werden kann und sich dabei möglichst wenig verformt. Dabei wird darauf geachtet, dass sich die abgeschiedene galvanische Schicht nicht verformen kann. Das Stützelement wird mit der bereits gegebenenfalls zuvor (im Rahmen einer ersten Fixierung des Abrasivmaterials im Formring) aufgebrachten galvanischen Schicht, die die Abrasivkörper bereits enthält, galvanisch verbunden.The material of the support element is chosen so that it can be easily introduced into the nickel layer and thereby deformed as little as possible. It is ensured that the deposited galvanic layer can not deform. The support element is galvanically connected to the previously already applied (as part of a first fixation of the abrasive material in the mold ring) galvanic layer already containing the abrasive body.

Demgemäß wird also die Ausgestaltung der Stützelements so gewählt, dass es einer gegebenenfalls wirkenden Verformungsspannung entgegenwirkt.Accordingly, therefore, the configuration of the support element is chosen so that it counteracts an optionally acting deformation stress.

Dabei ist darauf zu achten, dass das Stützelement so ausgestaltet bzw. so ausgelegt ist, dass eine gleichmäßige Abscheidung der galvanischen Schicht auch nach dem Einbringen des Stützelements erreicht werden kann. Das Stützelement darf namentlich keine Abschirmung bilden; der Austausch des Elektrolyts muss gewährleistet bleiben.It is important to ensure that the support element is designed or designed so that a uniform deposition of the galvanic layer can be achieved even after the introduction of the support element. The support element may not form a shield by name; the replacement of the electrolyte must be ensured.

Das Stützelement kann dabei vor oder nach dem Diamantieren eingebracht werden (d. h. vor oder nach der Einbringung des Abrasivmaterials auf die Oberfläche der oben genannten Ausnehmungen).The support element may be introduced before or after the diamondizing (that is, before or after the introduction of the abrasive material on the surface of the above-mentioned recesses).

Bei der vorgeschlagenen Ausgestaltung des Stützelements ist sichergestellt, dass das Stützelement beim Galvanisieren keine Veränderung der Korndichte (Anzahl der Körner auf der Fläche) und keine Kornfehlstellen bewirkt.In the proposed embodiment of the support member is ensured that the support element during galvanizing causes no change in the grain density (number of grains on the surface) and no grain imperfections.

Die vorgeschlagene Erfindung wird insbesondere bei Vollprofilrollen eingesetzt bzw. bei der galvanischen Negativbeschichtung.The proposed invention is used in particular in solid profile rollers or in the galvanic negative coating.

In den Zeichnungen ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:

Fig. 1
im teilweisen Radialschnitt die Seitenansicht eines Abrichtwerkzeugs in Form einer dreirilligen Vollprofilrolle,
Fig. 2
im Radialschnitt einen Formring mit dem mittels diesem hergestellten Abrichtwerkzeug und
Fig. 3
in perspektivischer Darstellung einen Teil eines Stützelements, das in das Abrichtwerkzeug eingebettet ist.
In the drawings, an embodiment of the invention is shown. Show it:
Fig. 1
in partial radial section, the side view of a dressing tool in the form of a tri-part solid profile roller,
Fig. 2
in radial section a molding ring with the dressing tool produced by this and
Fig. 3
in perspective a part of a support element which is embedded in the dressing tool.

In Figur 1 ist ein Abrichtwerkzeug 1 in Form einer Abrichtrolle dargestellt. Das Abrichtwerkzeug 1 besteht aus einem rotationssymmetrischen Bauteil, das eine Achsrichtung a aufweist sowie eine radiale Richtung r. In axialer Richtung weist das Abrichtwerkzeug 1 eine Breite B auf.In FIG. 1 a dressing tool 1 is shown in the form of a dressing roller. The dressing tool 1 consists of a rotationally symmetrical component which has an axial direction a and a radial direction r. In the axial direction, the dressing tool 1 has a width B.

Im Ausführungsbeispiel hat das Abrichtwerkzeug 1 drei ringförmig ausgebildete, in Umfangsrichtung umlaufende Vorsprünge 2, die sich in radiale Richtung r erstrecken. Diese Vorsprünge 2 sind mit Abrasivmaterial 6 in Form von Diamantpulver (entsprechender Körnung; abhängig vom abzurichtenden Schleifwerkzeug) versehen, so dass mit dem Abrichtwerkzeug 1 eine Schleifschnecke abgerichtet werden kann. Dieses Verfahren ist als solches bekannt und muss hier nicht näher erläutert werden.In the exemplary embodiment, the dressing tool 1 has three ring-shaped, circumferentially extending projections 2, which extend in the radial direction r. These projections 2 are provided with abrasive material 6 in the form of diamond powder (corresponding grain size, depending on the grinding tool to be dressed), so that a grinding worm can be dressed with the dressing tool 1. This method is known as such and need not be explained here.

Die Herstellung eines solchen Abrichtwerkzeugs 1 ist in Figur 2 illustriert. Zentrales Element für die Herstellung ist ein Formring 3, der eine im wesentlichen hohlzylindrische Gestalt aufweist. An einer radial innen liegenden Fläche 4 des Formrings 3 sind Ausnehmungen 5 eingearbeitet (d. h. mit hoher Genauigkeit eingeschliffen), die deckungsgleich (kongruent) mit den Vorsprüngen 2 ausgebildet sind (Negativverfahren).The production of such a dressing tool 1 is in FIG. 2 illustrated. Central element for the production is a mold ring 3, which has a substantially hollow cylindrical shape. On a radially inner surface 4 of the mold ring 3 recesses 5 are incorporated (ie ground in with high accuracy), which are congruent (congruent) formed with the projections 2 (negative method).

In den Ausnehmungen 5 wird bei der Herstellung des Abrichtwerkzeugs 1 zunächst das Abrasivmaterial 6 (Diamantpulver) platziert, so dass die Oberfläche 8 der Ausnehmungen 5 mit diesem Abrasivmaterial 6 zumindest teilweise bedeckt bzw. besetzt ist.In the recesses 5, the abrasive material 6 (diamond powder) is initially placed in the production of the dressing tool 1, so that the surface 8 of the recesses 5 is at least partially covered or occupied by this abrasive material 6.

Anschließend erfolgt die Erzeugung einer galvanischen Beschichtung 7, so dass das Abrasivmaterial 6 an der Oberfläche 8 der Ausnehmung 5 fixiert wird und für den späteren Abrichtvorgang zur Verfügung steht. In Figur 2 ist ein Zustand zu sehen, bei dem der galvanische Beschichtungsvorgang bereits weitgehend abgeschlossen ist, d. h. der Bereich der Ausnehmungen 5 hat sich bereits mit dem Material der Beschichtung gefüllt und darüber hinaus einen radial nach innen reichenden Bereich erfasst.Subsequently, the production of a galvanic coating 7, so that the abrasive material 6 is fixed to the surface 8 of the recess 5 and is available for the subsequent dressing process. In FIG. 2 is a state to see, in which the galvanic coating process is already largely completed, ie the area of the recesses 5 has already filled with the material of the coating and beyond detected a radially inward reaching area.

Wesentlich ist, dass vor der Ausbildung der kompletten Beschichtung 7 ein Stützelement 9 in den Formring 3 eingebracht wurde, der durch den galvanischen Beschichtungsvorgang in das sich bildende Abrichtwerkzeug 1 zumindest teilweise integriert wurde. In Figur 2 ist zu erkennen, dass das Stützelement 9 komplett in das Beschichtungsmaterial integriert wurde, d.h. von diesem umgeben ist. Somit ist also das Stützelement stoffschlüssig mit dem entstehenden Abrichtwerkzeug 1 verbunden. Möglich ist es allerdings auch, dass nach Abschluss des Beschichtungsprozesses das Stützelement 9 nicht vollständig vom Beschichtungsmaterial umgeben ist.It is essential that prior to the formation of the complete coating 7, a support element 9 was introduced into the mold ring 3, which was at least partially integrated by the galvanic coating process in the forming dressing tool 1. In FIG. 2 It can be seen that the support element 9 has been completely integrated into the coating material, ie surrounded by it. Thus, therefore, the support member is materially connected to the resulting dressing tool 1. However, it is also possible that after completion of the coating process, the support element 9 is not completely surrounded by the coating material.

Nachdem der in Figur 2 dargestellte Status erreicht ist, wird der Formring 3 entfernt, was durch einen spanenden Bearbeitungsvorgang erfolgen kann. Somit steht das Abrichtwerkzeug 1 zu seiner bestimmungsgemäßen Verwendung zur Verfügung.After the in FIG. 2 shown status is reached, the mold ring 3 is removed, which can be done by a machining operation. Thus, the dressing tool 1 is available for its intended use.

In Figur 3 ist das zum Einsatz kommende Stützelemente 9 noch einmal in perspektivischer Darstellung zu erkennen. Hier ist zu sehen, dass das Stützelement 9 eine Breite b aufweist, die im wesentlichen der Breite des Abrichtwerkzeugs 1 entspricht bzw. geringfügig kleiner als besagte Breite B ist.In FIG. 3 the coming to use support elements 9 can be seen again in a perspective view. Here it can be seen that the support element 9 has a width b which corresponds substantially to the width of the dressing tool 1 or is slightly smaller than said width B.

Das Stützelement 9 besteht aus mehreren (im Ausführungsbeispiel: aus vier) Ringen 11, die durch äquidistant über den Umfang verteilt angeordnete Querstreben 12 miteinander verbunden sind (insbesondere: verlötet). Bevorzugt sind 20 bis 80 Querstreben 12 über den Umfang. Somit ergeben sich, was in Figur 3 gesehen werden kann, Öffnungen 10, die es ermöglichen, dass während des Beschichtungsvorgangs Elektrolyt durch das Stützelement 9 hindurch treten kann und somit durch das Stützelement 9 der Galvanisierungsvorgang nicht bzw. kaum behindert wird.The support element 9 consists of several (in the embodiment: four) rings 11, which are connected by equidistantly distributed over the circumference arranged transverse struts 12 (in particular: soldered). Preferably, 20 to 80 transverse struts 12 are circumferentially. Thus arise what is in FIG. 3 can be seen, openings 10 that allow it during the coating process electrolyte can pass through the support member 9 and thus is not or hardly hindered by the support member 9 of the electroplating process.

Im vorliegenden Ausführungsbeispiel ist also das Stützelement 9 (bzw. Stützgitter) als gitterförmige Struktur aus Längs- und Querstreben gestaltet, die in den Formring gespannt wird. Die Maße der Gitterstruktur sind der zu unterstützenden Kontur angepasst. Das Stützelement wird dabei so im Formring positioniert, dass die Gesamtbreite der Rillen (Ausnehmungen) abgedeckt wird und das Stützelement komplett in die Nickelschicht eingebettet wird.In the present embodiment, therefore, the support element 9 (or support grid) designed as a lattice-shaped structure of longitudinal and transverse struts, which is stretched in the mold ring. The dimensions of the grid structure are adapted to the contour to be supported. The support element is thereby positioned in the mold ring, that the total width of the grooves (recesses) is covered and the support element is completely embedded in the nickel layer.

Es sei bemerkt, dass der Beschichtungsprozess, der in der Regel als galvanischer Prozess durchgeführt wird, vorteilhaft in zwei Stufen erfolgt:

  • In einer ersten Stufe wird in einer ersten Arbeitsstation durch ein erstes Beschichten mit Nickel das sich in den Ausnehmungen 5 befindliche Abrasivmaterial 6 fixiert, wobei der Formring 3 rotiert, so dass das Abrasivmaterial 6 durch die Zentrifugalkraft im Bereich der Oberfläche 8 der Ausnehmung 5 gehalten wird.
It should be noted that the coating process, which is usually carried out as a galvanic process, advantageously takes place in two stages:
  • In a first stage, in a first workstation, the abrasive material 6 located in the recesses 5 is fixed by a first coating of nickel, the molding ring 3 rotating, so that the abrasive material 6 is held in the area of the surface 8 of the recess 5 by the centrifugal force ,

Ist das Abrasivmaterial 6 dann insoweit fixiert, kann in einer zweiten Arbeitsstation die Beschichtung 7 im schlussendlich gewünschten Umfang durchgeführt werden. Bevor dies erfolgt, wird allerdings das Stützelement 9 in den Formring 3 eingebracht und durch den Beschichtungsprozess stoffschlüssig eingebunden.If the abrasive material 6 is then fixed in this respect, the coating 7 can be carried out in a finally desired extent in a second workstation. Before this occurs, however, the support element 9 is introduced into the mold ring 3 and integrally bonded by the coating process.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
Abrichtwerkzeugdressing tool
22
Vorsprunghead Start
33
Formringmold ring
44
radial innenliegende Flächeradially inner surface
55
Ausnehmungrecess
66
Abrasivmaterial (Diamantpulver)Abrasive material (diamond powder)
77
Beschichtungcoating
88th
Oberfläche der AusnehmungSurface of the recess
99
Stützelementsupport element
1010
Öffnung im StützelementOpening in the support element
1111
Ringring
1212
Querstrebecrossmember
rr
radiale Richtungradial direction
aa
Achsrichtung des AbrichtwerkzeugsAxial direction of the dressing tool
bb
Breite des StützelementsWidth of the support element
BB
Breite des AbrichtwerkzeugsWidth of the dressing tool

Claims (10)

Verfahren zum Herstellen eines Abrichtwerkzeugs (1) für ein Schleifwerkzeug, vorzugsweise für eine Schleifschnecke, wobei das Abrichtwerkzeug (1) mindestens einen, vorzugsweise ringförmig ausgebildeten, sich radial (r) erstreckenden Vorsprung (2) aufweist,
dadurch gekennzeichnet, dass
das Verfahren die Schritte aufweist: a) Herstellung eines Formrings (3), der an einer radial innenliegenden Fläche (4) eine der Anzahl der Vorsprünge (2) entsprechende Anzahl Ausnehmungen (5) aufweist, die kongruent zu den Vorsprüngen (2) ausgebildet sind; b) Platzieren eines Abrasivmaterials (6), insbesondere von Diamantpulver, in den Ausnehmungen (5); c) Erzeugung einer chemischen oder elektro-chemischen Beschichtung (7) in den Ausnehmungen (5), so dass das Abrasivmaterial (6) im Bereich der Oberfläche (8) der Ausnehmungen (5) fixiert wird; d) Entfernung des Formrings (3), um das so entstandene Abrichtwerkzeug (1) zu erhalten; wobei vor oder während Schritt b) oder vor oder während Schritt c) im Bereich der radial innenliegenden Fläche (4) ein Stützelement (9) platziert wird, das während Schritt c) zumindest teilweise durch die Beschichtung (7) stoffschlüssig mit dem entstehenden Abrichtwerkzeug (1) verbunden wird.Method for producing a dressing tool (1) for a grinding tool, preferably for a grinding worm, wherein the dressing tool (1) has at least one, preferably annular, radially extending projection (2),
characterized in that
the method comprises the steps of: a) production of a mold ring (3) having on a radially inner surface (4) one of the number of projections (2) corresponding number of recesses (5) which are formed congruent to the projections (2); b) placing an abrasive material (6), in particular diamond powder, in the recesses (5); c) generating a chemical or electrochemical coating (7) in the recesses (5), so that the abrasive material (6) is fixed in the region of the surface (8) of the recesses (5); d) removal of the mold ring (3) to obtain the resulting dressing tool (1); wherein before or during step b) or before or during step c) in the region of the radially inner surface (4) a support element (9) is placed, which during step c) at least partially by the coating (7) cohesively with the resulting dressing tool ( 1) is connected. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Stützelement (9) eine offene Gitterstruktur mit Öffnungen (10) verwendet wird, so dass insbesondere die radial innenliegenden Fläche (4) nicht durch das Stützelement (9) radial verschlossen wird.A method according to claim 1, characterized in that as an supporting element (9) an open grid structure with openings (10) is used, so that in particular the radially inner surface (4) is not radially closed by the support member (9). Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich das Stützelement (9) über eine Breite (b) erstreckt, die zwischen 90 % und 100 % der Breite (B) des Abrichtwerkzeugs (1) entspricht.A method according to claim 1 or 2, characterized in that the support element (9) extends over a width (b) which corresponds to between 90% and 100% of the width (B) of the dressing tool (1). Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass als Stützelement (9) eine Struktur verwendet wird, die eine Anzahl Ringe (11) aufweist, die in Umfangsrichtung der radial innenliegenden Fläche (4) verlaufen, wobei die Ringe (11) mittels Querstreben (12) miteinander verbunden sind, wobei die Querstreben (12) in Achsrichtung (a) des Abrichtwerkzeugs (1) verlaufen.Method according to one of claims 1 to 3, characterized in that as support element (9) a structure is used, which has a number of rings (11) extending in the circumferential direction of the radially inner surface (4), wherein the rings (11) by means of cross struts (12) connected to each other, wherein the transverse struts (12) in the axial direction (a) of the dressing tool (1) extend. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Ringe (11) und/oder die Querstreben (12) aus Metall bestehen.A method according to claim 4, characterized in that the rings (11) and / or the transverse struts (12) consist of metal. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Ringe (11) und/oder die Querstreben (12) einen kreisförmigen Querschnitt aufweisen.A method according to claim 4 or 5, characterized in that the rings (11) and / or the transverse struts (12) have a circular cross-section. Verfahren nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Anzahl der Ringe (11) sich aus der Anzahl der Vorsprünge (2) plus Eins ergibt.Method according to one of claims 4 to 6, characterized in that the number of rings (11) results from the number of projections (2) plus one. Verfahren nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Ringe (11) und die Querstreben (12) miteinander stoffschlüssig verbunden, insbesondere verschweißt oder verlötet, sind.Method according to one of claims 4 to 7, characterized in that the rings (11) and the transverse struts (12) connected to one another cohesively, in particular welded or soldered, are. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Formring (3) während der Durchführung des Schritts c) von Anspruch 1 zumindest zeitweise um seine Achse (a) rotiert.Method according to one of claims 1 to 8, characterized in that the mold ring (3) during the implementation of step c) of claim 1, at least temporarily rotated about its axis (a). Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Entfernung des Formrings (3) gemäß Schritt d) von Anspruch 1 durch Zerspanen, insbesondere durch Abdrehen, des Formrings (3) erfolgt.Method according to one of claims 1 to 9, characterized in that the removal of the mold ring (3) according to step d) of claim 1 by machining, in particular by twisting, the mold ring (3).
EP17000868.4A 2016-06-08 2017-05-22 Method for producing a dressing tool for a grinding tool Active EP3254806B1 (en)

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DE102016006951A1 (en) 2017-12-14
US10507564B2 (en) 2019-12-17
CN107471126A (en) 2017-12-15
EP3254806B1 (en) 2020-04-01
CN107471126B (en) 2020-09-22
US20170355063A1 (en) 2017-12-14

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