Honing ring for machining a workpiece gear

Abstract

Honing ring (1) for machining, preferably fine machining, a workpiece toothing, comprising: - an inner ring (2), and - an outer ring (3), - wherein the outer ring (3) surrounds the inner ring (2) at least in sections, - wherein the inner ring (2), preferably on an inner surface, has a honing ring toothing (4) for machining a workpiece toothing, - wherein the outer ring (3) is made at least in sections, preferably predominantly, of ceramic, and - wherein the inner ring (2) is made at least in sections, preferably predominantly, of polyurethane and / or epoxy resin.

Description

The present invention relates to a honing ring for machining, preferably fine machining, a workpiece toothing, comprising: an inner ring and an outer ring, wherein the outer ring surrounds the inner ring at least in sections, wherein the inner ring, preferably on an inner lateral surface, has a honing ring toothing for machining a workpiece toothing, wherein the outer ring is produced at least in sections, preferably predominantly, from ceramic and wherein the inner ring is produced at least in sections, preferably predominantly, from polyurethane and / or epoxy resin.Honing rings are predominantly manufactured from ceramic bonds. However, these ceramic bonds are limited in their ability to produce particularly fine surfaces up to polished surfaces. In order to achieve such surfaces, honing rings made of polyurethane and / or epoxy resin bonds are used. Honing rings made of these materials, however, tend to deform during clamping, for example during clamping onto a machine tool, which can impair the machining precision.The object of the present invention is therefore to provide a honing ring which offers improved clamping stability and at the same time enables optimized surface machining.The invention achieves this object by a honing ring according to claim 1.The honing ring for machining, preferably fine machining, a workpiece toothing system comprises an inner ring and an outer ring, wherein the outer ring surrounds the inner ring at least in sections, wherein the inner ring has, preferably on an inner lateral surface, a honing ring toothing system for machining a workpiece toothing system. This provides a honing ring for machining for externally toothed workpieces. The outer ring can preferably have an outer diameter of at least 250 mm, preferably 300 mm, in particular 350 mm. In particular, outer diameters of 269.95 mm and / or 399.95 mm are customary for attachment to machine tools.Furthermore, in the honing ring, it is provided that the outer ring is made at least in sections, preferably predominantly, of ceramic and that the inner ring is made at least in sections, preferably predominantly, of polyurethane and / or epoxy resin. Because the honing ring consists of two different material zones, improved clamping stability and simultaneously optimized surface machining are made possible. The ceramic outer ring ensures high stability, which prevents deformations during the clamping of the honing ring. The inner ring, which is in contact with the workpiece toothing of the workpiece to be machined, is relatively flexible due to the polyurethane and / or epoxy resin, in particular compared to ceramic. This enables a better adaptation of the honing ring, in particular of the honing ring toothing, to the surface of the workpiece, in particular of the workpiece toothing, and thus leads to an improved, preferably polished surface of the workpiece, in particular of the workpiece toothing. In order to reinforce the effects described, it can be provided that the inner ring, preferably in addition to the abrasive (which is explained below), comprises exclusively polyurethane and / or epoxy resin. The inner ring is preferably more elastic than the outer ring.The advantages can thus be summarized in particular as follows:preventing deformations of the honing ring during the clampingincreasing the achievable surface quality on the workpieceoptimized adaptation of the inner ring to the workpiece toothingThe mass proportion of the outer ring, preferably of the ceramic, in the total mass of the horning can be at least 40%, preferably at least 50%, and / or at most 95%, in particular at most 85%. Alternatively or additionally, the mass proportion of the inner ring, preferably of the polyurethane and / or epoxy resin, to the total mass of the horning can be at least 5%, preferably at least 15%, and / or at most 50%, in particular at most 40%. Alternatively or additionally, the proportion by volume of the outer ring, preferably of the ceramic, in the total volume of the horning can be at least 35%, preferably at least 45%, and / or at most 95%, in particular at most 85%. Alternatively or additionally, the proportion by volume of the inner ring, preferably of the polyurethane and / or epoxy resin, to the total volume of the horning can be at least 5%, preferably at least 15%, and / or at most 65%, in particular at most 55%. The effects described above can thereby be achieved particularly well. The exact division of the mass fraction and / or volume fraction depends on the respective application and can in principle be set individually.According to an exemplary embodiment of the honing ring, it is provided that the ceramic of the outer ring comprises an aluminum oxide ceramic, is preferred. Aluminum oxide ceramic has a high compressive strength and is thus particularly suitable for providing sufficient clamping stability.According to an exemplary embodiment of the honing ring, it is provided that the honing ring toothing comprises an internal toothing. As a result, externally toothed workpieces can be machined very easily.According to an exemplary embodiment of the honing ring, it is provided that the inner ring, preferably the honing ring toothing, comprises at least one abrasive and that, preferably, the abrasive comprises one or more abrasive grains, the abrasive, preferably the one or more abrasive grains, is embedded at least in sections in the inner ring, preferably the polyurethane and / or epoxy resin, and / or the abrasive, preferably the one or more abrasive grains, comprises aluminum oxide, silicon carbide, cemented corundum, boron nitride, preferably cubic boron nitride, and / or diamond. By means of appropriate grinding means, good results can be achieved in the surface processing of the workpiece. The embedding in the ceramic improves the bonding of the abrasive to the inner ring. The proportion of the abrasive in the total volume and / or the total mass of the inner ring can be between 0% and 99%. The exact proportion depends on the respective application and can in principle be set individually.According to an exemplary embodiment of the honing ring, it is provided that the inner ring and the outer ring are glued to one another and / or a press connection is present between the inner ring and the outer ring. This allows a stable connection between the outer ring and the inner ring to be achieved, so that the tool holds together even in the case of demanding machining operations. For providing the press connection, the outer ring can be pressed via the inner ring and / or the inner ring can be pressed into the outer ring.The invention is explained in more detail below with reference to a drawing which represents only a preferred exemplary embodiment. The drawing shows FIG. 1 shows a honing ring in a perspective view.The honing ring 1 comprises an inner ring 2 and an outer ring 3. The outer ring 3 surrounds the outer circumferential surface or outer circumferential surface of the inner ring 2 with its inner circumferential surface or inner circumferential surface. The inner ring 2 has a honing ring toothing 4 on its inner circumferential surface or inner circumferential surface for machining a workpiece toothing.The outer ring 3 is made of ceramic, in particular aluminum oxide ceramic, and the inner ring 2 is made of polyurethane and / or epoxy resin, wherein an abrasive in the form of abrasive grains is embedded in the polyurethane and / or epoxy resin, in particular in the region of the honing ring toothing 4.In principle, it is conceivable that the thickness of the inner ring 2, i.e. the distance between the outer diameter and the inner diameter of the inner ring 2, can vary in different embodiments in order to adapt to different workpiece and / or honing ring requirements. Alternatively or additionally, the thickness of the outer ring, i.e. the distance between the outer diameter and the inner diameter of the outer ring 3, can also vary in different embodiments in order to adapt to different workpiece and / or honing ring requirements. Further variations could include a different elasticity of the inner ring 2 or a reinforced connection between the outer ring 3 and the inner ring 1.

Claims

Honing ring (1) for machining, preferably fine machining, a workpiece toothing, comprising: - an inner ring (2), and - an outer ring (3), - wherein the outer ring (3) surrounds the inner ring (2) at least in sections, - wherein the inner ring (2), preferably on an inner lateral surface, has a honing ring toothing (4) for machining a workpiece toothing, - wherein the outer ring (3) is produced at least in sections, preferably predominantly, from ceramic, and - wherein the inner ring (2) is produced at least in sections, preferably predominantly, from polyurethane and / or epoxy resin.Horning (1) according to Claim 1, characterized in that the ceramic of the outer ring (3) comprises an aluminium oxide ceramic.Honing ring (1) according to claim 1 or claim 2, characterized in that the honing ring toothing (4) comprises an internal toothing.Honing ring (1) according to one of claims 1 to 3, characterised in that the inner ring (2), preferably the honing ring toothing (4), comprises at least one abrasive and that, preferably, - the abrasive comprises one or more abrasive grains, - the abrasive is embedded at least in sections in the inner ring (2), preferably the polyurethane and / or epoxy resin, and / or - the abrasive comprises aluminium oxide, silicon carbide, sintered corundum, boron nitride, preferably cubic boron nitride, and / or diamond.Honing ring (1) according to one of Claims 1 to 4, characterized in that the inner ring (2) and the outer ring (3) are bonded to one another and / or a press connection is present between the inner ring (2) and the outer ring (3).

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