• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a grinding wheel (1), in particular a polishing wheel, for grinding and / or polishing machining of surfaces, wherein the grinding wheel (1) has a working side (7) for machining workpieces and a fastening side (9) opposite the working side (7) Attachment of the grinding wheel (1), wherein the working side (7) comprises a first abrasive (3) and at least a second abrasive (5). It is proposed to return the at least one second abrasive (5) relative to the first abrasive (3) to the attachment side (9).
    公开号:CH709496B1
    申请号:CH00360/15
    申请日:2015-03-16
    公开日:2018-12-28
    发明作者:Zaech Roman
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    Description: The invention relates to a grinding wheel, in particular a polishing wheel, for grinding and / or polishing machining of surfaces, the grinding wheel having a working side for machining workpieces and a fastening side opposite the working side for fastening the grinding wheel.
    PRIOR ART EP 1 338 385 A1 discloses a polishing pad having a working surface, at least one abrasive and a filler. The abrasive and the filler are formed in the working surface of the polishing pad. Both the abrasive and the filler have abrasive bodies which are provided for machining a workpiece and can be brought into contact with a surface of the workpiece. Furthermore, the abrasive is surrounded by the filler.
    DISCLOSURE OF THE INVENTION The object of the invention is to design a grinding wheel for a machine tool with simple constructional measures in such a way that the changing effort of the grinding wheels is minimized for different demands on the grinding wheel and thus the set-up time for converting the grinding wheel.
    The object is achieved with a grinding wheel, in particular polishing pad, for grinding and / or polishing machining of surfaces, wherein the grinding wheel has a working side for machining workpieces and a working side opposite mounting side for attachment of the grinding wheel, wherein the working side a first Having abrasive and at least a second abrasive. According to the invention, the second abrasive is set back relative to the first abrasive towards the attachment side.
    The invention makes it possible to perform several steps with a grinding wheel and in particular with a polish, preferably in liquid or pasty form such as polishing cake, polishing slate, whiting, tin ash or cerium oxide, without having to change the grinding wheel or the polish. This is achieved by realizing two different grinding effects in one grinding wheel. This allows the grinding wheel to perform two modes. A first mode of grinding or polishing is achieved by contacting the first abrasive with a first contact force with the workpiece to be machined and machining a workpiece surface. The workpiece can be ground or polished. A second mode of operation of the grinding wheel according to the invention is made possible by pressing the grinding wheel onto the workpiece with a second pressing force, so that the second grinding means comes into contact with the workpiece to be machined and processes a workpiece surface. In this case, the second contact force is increased compared to the first. Due to the increased contact pressure, it is achieved that the first abrasive medium compresses by at least a distance by which the at least one second abrasive is set back relative to the first abrasive. Thus, at least partially, the second abrasive, in particular together with the first abrasive, be brought into contact with the surface of the workpiece in order to remove, for example, scratches from the surface of the workpiece can. The machining of the workpiece with the first abrasive can be designed in particular for a final grinding or polishing process. By grinding wheel according to the invention a considerable saving in time is achieved by eliminating the need to retool the grinding wheel or the polishing pad for changing requirements. Furthermore, time is saved, which would be incurred in an intermediate cleaning when converting the grinding wheels. This gives the user of the grinding wheel according to the invention a clear added value, since he can machine the workpiece to be machined in one go without having to change the grinding wheel.
    The inventive grinding wheel, in particular polishing pad is at least in two parts and comprises a first abrasive and a second abrasive, wherein the two abrasive disposed on the working side of the grinding wheel and are designed for grinding or polishing machining of workpieces. The second abrasive may be at least partially surrounded by the first abrasive. At a mounting side opposite the working side, the grinding wheel can be designed for attachment to a sanding pad. The attachment side of the grinding wheel may further comprise a fastening element which is designed for fastening, in particular for detachable fastening, of the grinding wheel on a sanding plate of a machine tool. The fastener may be directly or indirectly connected to the first abrasive and the second abrasive at a first side facing the working side. The fastening element, in particular a fastening surface of the fastening side of the fastening element, can be designed as a hook-and-loop fastener element that can be connected to the sanding pad. In particular, a connection may be formed, such as a connection for a grinding wheel from the description of US 4,609,581, US 5,505,747 and US 5,254,194. The connection, which is formed in particular on the attachment side of the grinding wheel, will therefore not be discussed further.
    An "abrasive" is to be understood in this context means that is designed for grinding and / or polishing machining of workpieces. The abrasive may be formed of a foam. In particular, the foam may be porous and / or permeable to air. Preferably, the foam may be formed as a closed-cell, an open-cell or a mixed cellular foam. Especially preferred, the foam can be flexible and in particular elastically deformable. The abrasive may consist of a lambskin, a cotton skin or a synthetic fur such as microfibers. Preferably, the abrasive may comprise at least one abrasive element, which is designed for grinding or polishing machining of the workpiece. In particular, it is also possible that the grinding elements are formed as abrasive grains, which are introduced into the abrasive.
    A "grinding element" is to be understood in this context, an element that has a deforming and / or erosive effect on the workpiece to be machined. An abrasive element may be formed by an abrasive grain, in particular from a mineral and / or a ceramic material, such as diamond, corundum, silicon carbide, boron nitride, etc. Here, the abrasive grain may have any geometric design appearing appropriate to one skilled in the art , Likewise, a grinding element may be at least partially formed as an edge, a corner or a taper of a surface structure, in particular a cellular surface structure of the abrasive, which causes the workpiece to be machined increased friction and temperature development, which has a deforming and / or erosive effect or in the workpiece to be machined. The surface structure may be formed as a microstructure and / or as a macrostructure. The microstructure may have a structure which is characterized by microscopically small unevenness of the surface height, for example by a roughness or by a porosity of the surface. The macrostructure may have a structure that is incorporated in the surface of the abrasive and may result in particularly advantageous grinding results. The macrostructure may be formed by slots, by elevations or by bulges, such as a dimpled, a slotted and / or a waffled surface.
    The dependent claims indicate expedient developments.
    It may be appropriate that the first abrasive and the second abrasive have a different hardness. In particular, the second abrasive may have a hardness which is higher than a hardness of the first abrasive. The hardness can be understood as a mechanical resistance of a body against penetration of a harder body. Furthermore, the first abrasive and the second abrasive may have a different flexibility or deformability, in particular elastic deformability. In particular, at least the first abrasive should have a deformability that is higher than a deformability of the second abrasive. "Deformability" in this context is to be understood as a property of a body that deforms due to the action of an external force, in particular at least substantially orthogonally to the longitudinal axis of the grinding wheel. Thereby, the first abrasive may be more compressed than the second abrasive, whereby the second abrasive added back to the attachment side may be brought into contact with the surface of the workpiece to be machined to machine the surface of the workpiece. Furthermore, the second abrasive may be formed more abrasive than the first abrasive.
    Preferably, the at least one second abrasive is transversely, in particular at least substantially orthogonal, to the longitudinal axis of the grinding wheel at least substantially surrounded by the first abrasive. This allows advantageous support of the second abrasive transversely, in particular orthogonally, to the longitudinal axis of the first abrasive, whereby the second abrasive is easily or not too distorted.
    By "substantially orthogonal" is to be understood in particular an orientation of a direction relative to a reference direction, in particular in a plane, wherein the direction relative to the reference direction a deviation, in particular less than 8 °, advantageously less than 5 ° and especially advantageously less than 2 °.
    Preferably, a ratio between the longitudinal extent, in particular along the longitudinal axis of the grinding wheel, the second abrasive and the longitudinal extent, in particular along the longitudinal axis of the grinding wheel, the first abrasive, in the range of a minimum of 10% to a maximum of 90%, preferably in the range from a minimum of 20% to a maximum of 80% and more preferably in the range of at least 30% to a maximum of 70%. Likewise, a ratio of at least 40% to a maximum of 60% or from a minimum of 45% to a maximum of 55% is possible. As a result, a compact design of the grinding wheel is achieved in the longitudinal direction, which ensures both modes of the grinding wheel. Furthermore, the contact pressure of the grinding wheel, which must be applied in particular for upsetting the first abrasive to be able to produce a contact of the second abrasive with the workpiece, can be optimally adapted to be applied to a pressing force of an operator.
    It is also proposed that the second abrasive is formed like a cylinder or truncated cone. As an alternative, any further geometrical, in particular three-dimensional, body of the second abrasive material that appears sensible to a person skilled in the art is also conceivable. As a result, forces that arise during a grinding or polishing process can be optimally absorbed. Furthermore, the cylindrical or frusto-conical second abrasive may be supported on the first abrasive.
    Furthermore, it is proposed that the first abrasive forms a first effective area and the second abrasive forms a second effective area. Preferably, these active surfaces are provided substantially on the working side of the grinding wheel and extend transversely, in particular at least substantially orthogonally, to the longitudinal axis of the grinding wheel to the working side. The first active surface and the second active surface are designed such that in the first operating mode of the grinding wheel, the first active surface with the first contact force is brought into contact with the workpiece to be machined and in the second mode of the grinding wheel at least partially the first
    Working surface and the second effective surface are brought with the second contact force in contact with the workpiece to be machined. For this purpose, the at least two contact forces acting on the grinding wheel at least substantially orthogonally to the longitudinal axis may be required. The first pressing force can bring the first active surface into contact with the workpiece to be machined, and the second pressing force can bring at least the at least one second active surface into contact with the workpiece. The second contact force is greater than the first contact force.
    In this context, an "effective surface" is to be understood as meaning a surface, in particular a surface lying in an imaginary plane and intersecting the grinding element arranged in and / or on the at least one abrasive, which during a grinding or polishing operation Touched workpiece surface of a workpiece to be machined.
    Preferably, the second active surface of the at least one second abrasive to the first active surface of the first abrasive to the mounting side by up to 10 mm, preferably set back by up to 6 mm, more preferably by up to 3 mm. Preferably, the second active surface of the at least one second abrasive means can be set back by up to 2 mm, preferably by up to 1 mm, toward the first active surface of the first abrasive material towards the fastening side. Preferably, a ratio of a recessed distance, in particular the second active surface of the at least one second abrasive to the first active surface of the first abrasive, in the longitudinal direction to the longitudinal extent of the grinding wheel or at least the first abrasive in the range of a minimum of 15% to a maximum of 20%, preferably in the range from a minimum of 10% to a maximum of 25%, particularly preferably in the range of a minimum of 5% to a maximum of 30%, possible. However, a ratio in the range of a minimum of 5% to a maximum of 40% or in the range of a minimum of 2% to a maximum of 50% is conceivable. The distance of the first abrasive medium to be bridged to the second abrasive material can be achieved by adapting the flexibility or the elastic deformability of the first abrasive medium or by increasing the contact pressure of the grinding wheel on the workpiece. Too much flexibility of the first abrasive does not cause the optimum use of the first mode of the grinding wheel, since the first abrasive yields too fast and too strong and thus the second mode is reached too quickly without taking advantage of the first mode optimally. Too small flexibility of the first abrasive, however, requires too much force of the operator on the grinding wheel to allow contact of the second abrasive with the workpiece. An advantageous contact pressure of the grinding wheel on the workpiece to be machined can be optimally adjusted by varying the flexibility and / or the distance of the set-back second effective surface of the second abrasive to the first active surface of the first abrasive.
    Further, it would be conceivable that the at least one second effective area for the first active area in a range of at least 25% to a maximum of 65%, preferably in the range of 35% to a maximum of 60% and more preferably in the range of a minimum of 45% to maximum 55% lies. This allows a machining of the workpiece in an optimal ratio of the first effective area and the second effective area. As a result, an advantageous grinding or polishing performance can be achieved. Preferably, the grinding wheel on at least one support element which is designed to support the second abrasive. In particular, the support element can be arranged from the working side in the direction of the fastening side behind the second abrasive. This allows supporting the second abrasive and thus increasing the stability of the second abrasive. The support member may be detachably connectable at least with the second abrasive. In this connection can be considered, which are provided for example on the mounting side of the grinding wheel with the sanding pad. In particular, the support member may be provided to limit the longitudinal extent to the longitudinal axis of the second abrasive means by the support element bridges the essential longitudinal extent of the first abrasive from the mounting side to the working side and connects to the second abrasive. As a result, the deformability or the flexibility of the second abrasive can be optimally adjusted. Thus, an excessive compression of the second abrasive in the longitudinal direction of the grinding wheel and a concomitant bulge transverse to the longitudinal direction can be avoided. In particular, the bulge transverse to the longitudinal direction could affect the second mode of operation of the grinding wheel in that increased friction between the first abrasive and the second abrasive may occur. Alternatively, can be dispensed with the support member, whereby the second abrasive extends from a mounting side to the working side.
    Preferably, the at least one support element is harder than the first abrasive and / or as the second abrasive. In particular, the at least one support element may have a flexibility or a deformability that is less than the flexibility or deformability of the first abrasive and / or the second abrasive. This significantly increases the stability of the support element again and ensures a contact of the second abrasive material to the workpiece or the second operating mode of the grinding wheel. The support member can thus absorb greater forces without deforming too strong elastic. In particular, the at least one support element may be surrounded transversely, in particular at least substantially orthogonally, to the longitudinal axis of the grinding wheel at least substantially by the first abrasive. Thereby, the support member may be supported transversely to the longitudinal axis of the grinding wheel on the first abrasive, whereby a contact region of the support member to the first abrasive is formed which generates frictional forces and thus minimizes excessive distortion of both the support member and the abrasive.
    Furthermore, it is proposed that the first abrasive is at least partially made of foam, in particular an open-cell foam. Alternatively or additionally, the second abrasive may also be formed at least partially from foam, in particular an open-cell foam. Alternatively or additionally, the support element may be at least partially made of foam, in particular an open-cell foam. Here, a polyurethane foam (PUR) or ethylene vinyl acetate foam (EVA) can be used. Preferably, the formed of foam first abrasive and / or second abrasive is flexible or slightly elastically deformable. It can thereby advantageously be made possible a particularly comfortable processing in hard to reach partial areas to be machined workpieces. In addition, an adaptation of a shape of the abrasive to a contour of a workpiece to be machined can advantageously be achieved. Thus, a precise machining of a workpiece to be machined can advantageously be made possible.
    It may be expedient that the grinding wheel has a fastening element. Furthermore, the fastening element may be formed with a first side and with a second side opposite the first side. In this case, advantageously, the fastening element, in particular the first side of the fastening element, with the at least one first abrasive and / or the at least one support element connectable. As a result, the abrasives and / or the at least one support element can be brought into a predetermined position and firmly connected to the fastening element. Preferably, the second side of the fastener may be the attachment side of the grinding wheel and be designed in particular for fastening the grinding wheel. This is advantageous because the fastener allows attachment to the machine-side sanding pad.
    Advantageously, the second side, in particular the fastening side, of the fastening element may be at least partially designed as a hook-loop fastening element, in particular as a hook-and-loop fastener element. As a result, the fastening element, in particular the grinding wheel, can advantageously be detachably connected to the machine-side sanding pad. Alternatively or additionally, the second side, in particular the fastening side, of the fastening element may be at least partially designed as an adhesion fastening element. In this case, the fastening element can be at least partially designed as a pressure-sensitive adhesive fastening element or another fastening element known to a person skilled in the art for detachable or non-detachable connection.
    BRIEF DESCRIPTION OF THE DRAWINGS Further advantages will become apparent from the following description of the drawings. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The skilled person will conveniently consider the features individually and summarize meaningful further combinations. This shows
    1 is a plan view of an embodiment of the inventive grinding wheel,
    2 shows a sectional view of the grinding wheel from FIG. 1 along the section A-A, FIG.
    Fig. 3 is a cross-sectional view of a grinding wheel with a sanding pad.
    In the figures, the same components are provided with the same reference numerals.
    The following figures each relate to a grinding wheel 1, in particular for attachment to a sanding pad of a machine tool, preferably a hand tool, with a rotary or translational, in particular an oscillating, working movement and an at least partially translational feed on a workpiece to be machined. The grinding wheel 1 is suitable for processing, in particular for grinding or polishing, surfaces such as a body in the automotive industry. The machine tool is preferably a hand tool, in particular an orbital sander, a disc sander or an angle grinder, or a numerically controlled machine tool, in particular a single-disc grinding machine, for machining surfaces of solid materials.
    1 shows a working side 7 of the grinding wheel 1 with a first abrasive 3 and at least one second abrasive 5. The grinding wheel 1 extends radially from a center 61 of the grinding wheel 1 to a peripheral side 21, in particular a peripheral surface, the circular grinding wheel 1. The center 61 of the grinding wheel 1 also forms the piercing point of a longitudinal axis 19 of the grinding wheel 1, so that the working side 7 of the grinding wheel 1 is formed transversely, in particular at least substantially orthogonal, to the longitudinal axis 19 , Accordingly, first active surfaces 11 of the at least first abrasive means 3 and second active surfaces 13 of the at least second abrasive means 5 of the working side 7 are formed transversely, in particular at least substantially orthogonally, to the longitudinal axis 19. The respective at least one second abrasive means 5 may have a longitudinal axis 19 'which extends at least substantially parallel to the longitudinal axis 19 of the grinding wheel 1 (see FIG. 2).
    The working side 7 of the grinding wheel 1 according to FIG. 1 has a first abrasive 3 with at least one first active surface 11, which is designed for grinding or polishing of a workpiece to be machined. The working side 7 also has at least one second abrasive 5 with at least one second effective surface 13, which is also designed for grinding or polishing of a workpiece to be machined. In a further, not shown embodiment, the working side of the grinding wheel may also have a third abrasive with at least a third active surface, which is also designed for grinding or polishing a workpiece to be machined.
    In the embodiment of Fig. 1, the first abrasive 3 is provided with a first active surface 11, wherein the first active surface 11 forms a coherent active surface. The second abrasive 5 forms in the embodiment of FIG. 1 a plurality of second active surfaces 13. The second abrasive 5 is embedded in the first abrasive 3 such that the first abrasive 3 substantially completely surrounds the second abrasive 5. The second active surfaces 13 are each substantially completely surrounded by the first active surface 11. The second active surfaces 13 are formed in the form of circular disks around the respective longitudinal axis 19 'of an effective surface 13. As an alternative to the circular disk shape of the second active surfaces 13 according to FIG. 1, other geometric shapes may also be provided for the second active surfaces, such as square, rectangular or other polygonal shapes (not shown).
    The first active surface 11 extends radially to the longitudinal axis 19 up to the peripheral side 21 of the grinding wheel 1. The first active surface 11 is, in particular contiguous, formed as a single active surface 11. Alternatively to a single first active surface 11, the first abrasive 3 may also be divided into sections such that the first abrasive 3 forms a plurality of first active surfaces 11. Thus, for example, two, three, four or more first active surfaces 11 may be provided. If there are a plurality of first active surfaces, these may for example have the shape of circular segments or circular sectors or form concentric rings around a center of the grinding wheel (not shown). The sections may be introduced by slots on the working side of the first abrasive or by, in particular radially, spaced apart first abrasive itself. It would be conceivable that the sections of the first abrasive are introduced in a circle-shaped or bent in the working side. If a first abrasive having a plurality of first active surfaces is provided and these first active surfaces are arranged at a distance from each other, the second abrasive is introduced in the spaces between adjacent first active surfaces, which also has a plurality of second active surfaces. Thus, for example, the first active surfaces and the second active surfaces alternately arranged to form concentric rings around a center of a grinding wheel or alternately arranged side by side circular sectors.
    In a particular embodiment of the abrasive 3, 5, the active surfaces 11, 13 of the abrasive 3, 5 may have abrasive elements 23 which may be incorporated in the abrasives 3, 5. The active surfaces 11, 13 may also have a surface structure 25, in particular a microstructure and / or macrostructure, preferably an edge, a ridge or an end. The surface structure may be, for example, a waffle structure. The grinding elements 23 and / or the surface structure 25 themselves contribute to a grinding or polishing effect of the abrasives 3, 5 on the workpiece to be machined.
    In a simple embodiment according to a second embodiment of FIG. 3, a first abrasive 3 with only a first active surface 11 and a second abrasive 5 with only a second effective area 13 is provided. In this case, a first active surface 11 and a second active surface 13 are arranged concentrically around the center 61 and the longitudinal axis 19, wherein the first active surface 11 completely surrounds the second active surface 13. A more detailed description of the second embodiment will be given below in connection with FIG. 3.
    In this case, the at least one second abrasive 5 or the at least one second active surface 13 in the first abrasive 3 or in the first active surface 11 of the working side 7 of the grinding wheel 1 may be arranged such that there is a regular or irregular pattern. In one embodiment, in which a plurality of second abrasive means 5 or a plurality of second active faces 13 are provided within the first abrasive means 3 and the first effective face 11, the plurality of second abrasive means 5 can form a regular or irregular pattern. The at least one pattern of the second abrasive means 5 may be formed as a straight line, curved or in a combination of both in the first abrasive 3. Likewise, at least one steady or discrete pattern may be possible. The at least one pattern may extend from a center, in particular a center 61, of the grinding wheel 1 to the peripheral side 21. The pattern 27 may be formed by a mathematical equation of a curvature, in particular with or without a variable curvature radius, for example the equation of a circle, a spiral or a special shape of a spiral such as a Fermat or a fibonacci-like spiral. Likewise, the pattern 27 may be formed as a single second abrasive 5, which is introduced, for example, as a circular concentric to the longitudinal axis 19 in the center, in particular to the center 61 of the grinding wheel 1 and extending radially. The pattern 27 may further comprise a modified form of a spiral or be characterized by at least two spirals. In particular, the spirals may be formed opposite each other.
    In particular, the pattern 27 results from an arrangement of the at least one second active surface 13 to the at least one first active surface 11. Preferably, the second active surfaces 13, in particular of the pattern 27, in particular to the first active surfaces 11, in the working side 7 such arranged that the second active surfaces 13 along a spiral, in particular a spiral line run. The second active surfaces 13, in particular of the pattern 27, may extend in a spiral manner, in particular in the form of a Fibonacci spiral, in particular from the center 61 of the grinding wheel 1, to the peripheral side 21. As a result, it can be advantageously achieved that the second active surfaces 13 are uniformly distributed on the working side 7, and it can be prevented that the second active surfaces 13 lie directly behind one another in the radial and / or circumferential direction.
    1 shows the working side 7 of the grinding wheel 1, the first abrasive 3 and the second abrasive 5. In addition to the illustration of FIG. 1, the support member 15 and the fastener 17 shown. It can be seen that the grinding wheel 1 extends axially to the longitudinal axis 19. In this case, the working side 7 of the grinding wheel 1 on one of the working side 7 opposite mounting side 9, which is provided in particular for attachment of the grinding wheel 1, in particular a sanding pad 2, a machine tool.
    The first abrasive 3 may be considered, in particular with reference to FIG. 1, as a cylindrical or a prism-shaped body. However, the first abrasive 3 does not rely on a cylindrical or a prism-shaped body, but may have any other geometrical body that appears expedient to a person skilled in the art. The first abrasive 3 is bounded axially to the longitudinal axis 19 by the working side 7 and one of the working side 7 opposite first side 47 of the fastener 17. The first abrasive 3 has at least one recess 31, 33, which is designed to introduce the second abrasive 5.
    In this embodiment, two recesses 31, 33 are shown. The first recess 31 may extend at least substantially along the longitudinal axis 19 and extending transversely thereto through the entire longitudinal extent to the longitudinal axis 19 of the first abrasive means 3. A second recess 33 may also extend along the longitudinal axis 19 and transversely to the longitudinal axis 19, but not over the entire longitudinal extent of the first abrasive 3, in a manner analogous, in particular concentric, to the first recess 31. Preferably, the longitudinal extent of the first recess 31 is transversely, in particular at least substantially orthogonal, to the longitudinal axis 19 smaller than the longitudinal extent of the second recess 33. The first recess 31 may thus have, for example, a through hole having a first diameter 55 and the second recess 33 a the first recess 31 concentric bore with a second diameter 57, wherein the second bore is only partially introduced in the longitudinal extent of the first abrasive 3. In this case, the second diameter 57 may be formed larger than the first diameter 55. Between an outer surface 39 of the second abrasive 5 and an inner surface 41 of the second recess 33, in particular of the first abrasive 3, a gap 35 may arise. This gap 35 can be provided to permit a bulge or thickening of the inner surface 41 of the second recess 33 transversely to the longitudinal axis 19 occurring during a compression of the first abrasive 3 along the longitudinal axis 19, without touching the second abrasive. It can thereby be achieved that the outer surface 39 of the second abrasive 5 and the inner surface 41 of the second recess 33, in particular of the first abrasive 3, generate no or only slight friction losses. Thus, a low-friction movement between the first abrasive 3 and the second abrasive 5 can be made possible, in particular to allow reliable contact of the second abrasive 5 with a workpiece to be machined. The first and / or the second recess 31, 33 may be cylindrical, but are not limited to a cylindrical shape, but may have any one skilled in the appear appropriate form. In the recesses 31,33, the second abrasive 5 and / or a support member 15 may be introduced.
    The second abrasive 5 is connectable to a first side 45 of the support element 15 on a second side 43 opposite the first active surface 11, 13, as already described in FIG. In this case, the second side 43 of the second abrasive means 5 and the first side 45 of the support member 15 with a hook and loop fastener, in particular a hook-loop connection, or other one skilled in the appear appropriate sense detachable connection can be connected. It would also be conceivable to form a permanent connection between the second abrasive 5 and the support element 15. Alternatively or additionally, it is possible to dispense with the support element 15, as a result of which the second abrasive means 5 can be connected to the first side 47 of the fastening element 17. The second abrasive 5 may be frusto-conical or cylindrical, in particular tablet-shaped, formed, but is not limited to a geometric shape, but may have any other one of a person skilled in appearing appropriate geometric body. Alternatively, the second abrasive 5, in particular the second side 39 of the second abrasive 5, could be directly connectable to the first side 47 of the fastener 17. As a result, an intermediate element in the form of the support element 15 could be saved.
    The support member 15 is adapted to fix the second abrasive 5 and to keep it in a stable position. The support member 15 has a first side 45 opposite the second side 49, which is connectable to the first side 47 of the fastener 17.
    Fig. 3 shows the grinding wheel 1 almost analogous to Fig. 2 and a sanding pad 2 to which the grinding wheel 1 with the mounting side 9 can be fastened to the machine tool. With regard to the distribution of the first abrasive 3 and second abrasive 5 on the working side 7 of the grinding wheel 1, the embodiment of Fig. 3 is an alternative embodiment to the embodiment of Fig. 1. In this embodiment, the first abrasive 3 is a single second abrasive 5, wherein the second abrasive 5 is disposed to the first abrasive 3 concentrically in a central region 65. The first abrasive 3 surrounds the second abrasive 5 transverse to the longitudinal axis 19 and is disposed in an outer region 66 of the grinding wheel. In this embodiment, a machining of the workpiece is at least substantially represented by the second abrasive 5. This is achieved by the first flexible abrasive 3, in particular by a pressing force acting on the sanding pad 2 and a demensprechenden reaction force of the workpiece to be machined, substantially at least axially compressed and the first active surface 11 thus axially displaced towards the mounting side 9. It can thereby be achieved that the second abrasive 5, in particular the second effective surface 13 of the second abrasive 5, is brought into contact with the surface of the workpiece to be machined and can produce a grinding or polishing effect on the workpiece.
    权利要求:
    Claims (12)
    [1]
    1. grinding wheel, in particular polishing wheel, for grinding and / or polishing machining of surfaces, wherein the grinding wheel (1) has a working side (7) for machining workpieces and a working side (7) opposite mounting side (9) for fixing the grinding wheel (1 ), wherein the working side (7) comprises a first abrasive (3) and at least one second abrasive (5), characterized in that the at least one second abrasive (5) relative to the first abrasive (3) to the attachment side (9) out wherein the first abrasive (3) forms a first active surface (11) and the at least one second abrasive (5) forms a second active surface (13) and the first abrasive is brought into contact with the workpiece to be processed with a first contact force can and the second abrasive with a second contact force can be brought into contact with the workpiece to be machined kan n, wherein the second contact force is increased compared to the first contact force.
    [2]
    2. Grinding wheel according to claim 1, characterized in that the first abrasive (3) and the at least one second abrasive (5) have a different deformability.
    [3]
    3. Grinding wheel according to one of the preceding claims, characterized in that the first abrasive means (3) has a deformability which is higher than a deformability of the at least one second abrasive means (5).
    [4]
    4. Grinding wheel according to one of the preceding claims, characterized in that the at least one second abrasive (5) transversely, in particular orthogonally, to the longitudinal axis (19) of the grinding wheel (1) at least substantially surrounded by the first abrasive (3).
    [5]
    5. Grinding wheel according to one of the preceding claims, characterized in that the ratio between the longitudinal extension of the at least one second abrasive (5) and the longitudinal extent of the first abrasive (3) in the range of a minimum of 10% to a maximum of 90%, preferably in the range of 20% to 80% and more preferably in the range of 30% to 70%.
    [6]
    6. Grinding wheel according to one of the preceding claims, characterized in that the second active surface (13) of the at least one second abrasive means (5) to the first active surface (11) of the first abrasive means (3) to the attachment side (9) out by up to 10 mm , is preferably set back by up to 6 mm, more preferably by up to 3 mm.
    [7]
    7. Grinding wheel according to one of the preceding claims, characterized in that the ratio of the at least one second active surface (13) to the first active surface (11) in a range of at least 25% to a maximum of 65%, preferably in the range of at least 35% to maximum 60% and more preferably in the range of a minimum of 45% to a maximum of 55%.
    [8]
    8. Grinding wheel according to one of the preceding claims, characterized in that the grinding wheel (1) has at least one support element (15) which is designed to support the at least one second abrasive means (5).
    [9]
    9. Grinding wheel according to claim 8, characterized in that the at least one support element (15) has a deformability which is less than the deformability of the first abrasive means (3) and / or the at least one second abrasive means (5).
    [10]
    10. Grinding wheel according to one of claims 1 to 7, characterized in that the first abrasive (3) and / or the at least one second abrasive (5) made of foam, in particular an open-cell foam, is formed.
    [11]
    11. Grinding wheel according to one of claims 8 and 9, characterized in that the first abrasive (3) and / or the at least one second abrasive (5) and / or the support element (15) made of foam, in particular an open-cell foam, is formed ,
    [12]
    12. Grinding wheel according to one of the preceding claims, characterized in that the grinding wheel (1) has a fastening element (17).
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    同族专利:
    公开号 | 公开日
    CN104972410A|2015-10-14|
    DE102014207047A1|2015-10-15|
    CH709496A2|2015-10-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3882646A|1974-03-06|1975-05-13|Gleason Works|Grinding wheel assembly having multiple grinding surfaces for selective engagement with a workpiece|
    SE8004172L|1979-06-26|1980-12-27|Lippert H Gmbh|GRINDING ORGANIZATION FOR METAL WORKING|
    JPS58149176A|1982-03-01|1983-09-05|Toshiba Corp|Abrasive grain finishing tool|
    US4609581A|1985-04-15|1986-09-02|Minnesota Mining And Manufacturing Company|Coated abrasive sheet material with loop attachment means|
    US5254194A|1988-05-13|1993-10-19|Minnesota Mining And Manufacturing Company|Coated abrasive sheet material with loop material for attachment incorporated therein|
    EP0619165A1|1993-04-07|1994-10-12|Minnesota Mining And Manufacturing Company|Abrasive article|
    US5505747A|1994-01-13|1996-04-09|Minnesota Mining And Manufacturing Company|Method of making an abrasive article|
    CN2267123Y|1995-10-12|1997-11-12|潘祖涛|Double pieces adjustable type diamond grainding wheel|
    AT402787T|2000-10-24|2008-08-15|Vladimir Stepanovi Kondratenko|POLISHING TOOL AND A COMPOSITION FOR MANUFACTURING THE TOOL|
    CN100519082C|2006-06-13|2009-07-29|广东奔朗超硬材料制品有限公司|Edging wheel manufacturing method|
    EP1961519A1|2007-02-22|2008-08-27|sia Abrasives Industries AG|Grinding tools|
    CN102672629A|2012-05-23|2012-09-19|桂林创源金刚石有限公司|Double-ring composite type diamond cup-shaped grinding wheel|JP6859035B2|2016-07-08|2021-04-14|スピードファム株式会社|Abrasive|
    DE102019127341A1|2019-10-10|2021-04-15|Schmitz-Metallographie GmbH|Method of manufacturing an abrasive unit|
    DE102019218562A1|2019-11-29|2021-06-02|Robert Bosch Gmbh|Foam abrasives and methods of making|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014207047.3A|DE102014207047A1|2014-04-11|2014-04-11|grinding wheel|
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