• 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 an electrode assembly for the electrochemical machining of a metallic workpiece, having a circular electrode surface, the electrically conductive portions (1 03) and electrically insulating portions (200, 300), wherein the electrically insulating portions (200, 300) are shaped similarly the electrically conductive regions (103) and parts of the electrically insulating regions (200) protrude in the axial direction over the plane (402) of the electrically conductive regions (1 03) and are formed as bearing surfaces (206) for supporting the electrode arrangement on the workpiece. The invention is characterized in that the radially outer edge of the bearing surfaces (206) is arranged on a larger diameter than the radially outer edge of the electrically conductive regions (1 03) and the radially inner edge of the bearing surfaces (206) on the same or a larger diameter is arranged as the radially inner edge of the electrically conductive regions (1 03).
    公开号:AT517541A1
    申请号:T470/2015
    申请日:2015-07-15
    公开日:2017-02-15
    发明作者:Fleig Jürgen
    申请人:Minebea Co Ltd；
    IPC主号:
    专利说明:

    Electrode for the electrochemical machining of a metallic component and a method for the production thereof
    Field of the invention
    The invention relates to an electrode for the electrochemical machining of a metallic component and to a method for the production thereof.
    State of the art
    Electrodes for electrochemical machining of metallic components (ECM electrodes) are known in various forms from the prior art. In particular, such electrodes are also used in the production of fluid dynamic bearing systems, as used for the rotary mounting of miniature spindle motors. By means of the electrodes, the bearing groove structures of the fluid dynamic bearings are introduced into the bearing surfaces.
    For example, DE 10 2007 023 494 A1 discloses the structure of a cylindrical electrode for producing radial bearing groove structures. Accordingly, this electrode is preferably suitable for the production or processing of cylindrical bearing surfaces. For introducing axial bearing structures for fluid-dynamic thrust bearings, electrodes having circular or annular electrode surfaces are preferably required. Such an electrode is disclosed in DE 10 2007 008 860 B4. In this case, the electrode needs contact points or bearing surfaces which rest on the workpiece in order to ensure a constant distance of the electrode surface from the workpiece, so that an accurate machining of the workpiece is possible. As a rule, at least three support points or bearing surfaces are used in the case of annular electrodes or circular electrodes distributed over the circumference. The disadvantage of these bearing surfaces is that no electrochemical machining of the workpiece can take place in the region of these surfaces, since the workpiece surface is covered in the area of the bearing surfaces. In axial bearing structure, this means that in the region of the bearing surfaces, the axial bearing structures must be interrupted and are therefore deformed, so that the mode of action of these axial bearing structures in the axial bearing itself is impaired by these deformations.
    The bearing surfaces thus form open spaces on the workpiece, which are not to be processed. In the area of these open spaces there is no pumping action in the bearing grooves and thus a reduction of the fluid dynamic effect.
    JP 2004-58179A discloses an electrode for electrochemically machining bearing surfaces of thrust bearings having an electrode surface with groove structures having recessed and raised portions. For electrical insulation of the spaces between the raised areas of the bearing groove structures, an insulation disc is provided, which has electrically insulating structures which engage in and protrude into the spaces between the raised electrically conductive structures, so that they serve as support surfaces for resting on the workpiece. These support structures extend over and beyond the entire length of the structures of the electrode to allow any circulation of the electrolyte between the electrode and the workpiece. The dimensions of the insulating cover disc are therefore both radially inward lying as lying radially outside larger than the dimensions of the annular electrode surface.
    Disclosure of the invention
    It is the object of the invention to provide an electrode for the electrochemical machining of a metallic workpiece and a method for producing this electrode, which electrode is simple and above all to produce with repeatable accuracy and ensures optimum circulation of the electrolyte between the electrode and the workpiece.
    This object is achieved by an electrode having the features of the independent claims and a method for producing this electrode having the features of claim 10.
    The electrode comprises a circular electrode surface which has electrically conductive and electrically insulating regions, wherein the electrically insulating regions are similarly shaped as the electrically conductive regions and parts of the electrically insulating regions protrude in the axial direction beyond the surface of the electrically conductive regions and serve as bearing surfaces Pad are formed on the workpiece.
    According to the invention, the radially outer edge of the bearing surfaces is arranged on a larger diameter than the radially outer edge of the electrically conductive regions, while the radially inner edge of the bearing surfaces is arranged on the same or a larger diameter than the radially inner edge of the electrically conductive regions.
    In another embodiment of the invention, the radially outer edge of the bearing surfaces is arranged on the same diameter as the radially outer edge of the electrically conductive regions, while the radially inner edge of the bearing surfaces is arranged on a larger, the same or a smaller diameter than the radial inner edge of the electrically conductive areas.
    In a further embodiment of the invention, the radially outer edge of the bearing surfaces is arranged on a smaller diameter than the radially outer edge of the electrically conductive regions, while the radially inner edge of the bearing surfaces is arranged on a larger, the same or a smaller diameter than the radially inner edge of the electrically conductive regions.
    In all embodiments, the electrode is designed such that the bearing surfaces are not connected radially outside the circular electrode surface, so that during machining of the workpiece, electrolyte can freely circulate and flow between the surface of the workpiece and the surface of the electrically conductive regions of the electrode.
    Such an electrode can be used in particular for processing bearing surfaces of a fluid dynamic bearing, wherein the electrically conductive regions are an image of bearing structures of the fluid dynamic bearing, preferably a fluid dynamic thrust bearing.
    In another embodiment of the invention it is provided that the electrically insulating bearing surfaces in the region of the radially inner edge of the electrode surface taper and have wedge-shaped ends, d. H. tapering at this end. This embodiment has the particular advantage that these tapered structures are arranged in the direction of flow, d. H. The electrolyte flows in the direction of the taper of the bearing surfaces and can flow through the wedge-shaped shaping unhindered and without turbulence. This promotes a uniform and repeatable electrochemical removal process.
    Advantageously, the wedge-shaped ends of the support surfaces are not formed symmetrically, but have on one side a larger slope than on the other side. As a result, the electrolyte can flow away unhindered in the direction of the center of the electrode, and there is no turbulence at the edges of the electrode surface.
    In a preferred embodiment of the invention, the electrically insulating regions are completely made of a plastic throughout.
    In another preferred embodiment of the invention, the electrically insulating regions are partly made of plastic and partly of an electrically insulating potting compound. In this case, preferably the surface of the part of the insulating regions, which is made of potting compound, is located in the same axial plane in which the surface of the electrically conductive regions lies.
    Preferably, the ratio of the surface of the electrically conductive regions to the surface of the bearing surfaces is between 1 and 12.
    In an advantageous manner, the electrically insulating regions provided as bearing surfaces are part of the electrode and materially connected to the metallic electrode body. This makes it possible that the bearing surfaces can extend directly to the edges of the electrode surface, without these must protrude beyond the edges, as is the case for example in the prior art.
    In the prior art, there is also the disadvantage that the bearing surfaces had to be worked out of an annular insulation plate, and very fine structures had to be processed especially at small radii of the electrode, which require a repeatable high accuracy and a complex machining process.
    In the present invention, the bearing surfaces are defined primarily in the area of the outer radius of the electrode surface, the structures required are much larger and therefore easier to manufacture, resulting in a cheaper production of the electrode and a better repeatability of the accuracy.
    The invention also relates to a method for producing an electrode for the electrochemical machining of a metallic workpiece, the method comprising the following steps:
    Providing an electrically conductive electrode body having at least one circular electrode surface, introducing groove-like structures into the electrode surface so that recessed areas and raised areas on the electrode surface result, providing an electrically insulating cup-shaped cap having a central bore and an annular surface, introducing groove-like structures in the annular surface of the cap, which are complementary to the projections and recesses of the electrode surface, placing and sticking the cap on the electrode body such that the annular surface of the cap lies on the circular electrode surface, wherein the complementary electrically insulating structures of the Cap come to lie in the spaces between the groove-like structures of the electrode body, filling a space formed by the cap and the electrode surface clearance s with an electrically insulating potting compound, removing the material of the cap and the electrically insulating potting compound to a first level, in which the surface of the raised portions of the electrode surface is located and removing the raised portions of the groove-like structures of the electrode body, the electrically insulating potting compound and Dividing the electrically insulating structures of the cap to a second level, which is an amount s below the first level.
    With this manufacturing method results in a relatively easy to manufacture and especially with a high repeatability produced electrode, which has corresponding bearing surfaces which are formed by electrically insulating structures of the sleeve, wherein the electrically conductive structures of the electrode surface at a defined depth s below the surface of the Support surfaces are arranged.
    The electrolyte can flow freely in the radial direction on the electrode mounted on the workpiece through the recessed channels between the surfaces of the electrically conductive structures and the workpiece, so it can for example be supplied radially from the outside or inside and radially inwardly or outwardly through the structured Drain channels of the electrode. For the insulating cap, a plastic sleeve is preferably used, which consists for example of a polyetherimide.
    The groove-like structures of the electrode surface and the complementary electrically insulating structures consist of a plurality of elongated, straight or curved grooves.
    The complementary structures may taper in a wedge shape at one end, i. the width of the structures decreases at this end.
    The invention will be described in more detail with reference to drawings. This results in further features and advantages of the invention.
    Brief description of the drawings:
    FIG. 1 shows a section through an electrode body for the electrochemical machining of a workpiece. FIG. 1 a shows a plan view of the electrode body of FIG. 1
    Figure 2 shows a section of the electrode body with attached cap
    Figure 2a shows a plan view of the electrode body with attached cap
    FIG. 3 shows a section through the electrode body with cap and
    insulating compound
    FIG. 3 a shows a plan view of the arrangement of FIG. 3
    FIG. 4 shows a section through the electrode body, cap and insulating compound after machining
    FIG. 4 a shows a plan view of the arrangement of FIG. 4
    FIG. 5 shows a section according to FIG. 4 after another
    processing step
    FIG. 5 a shows a plan view of the arrangement of FIG. 5
    FIG. 6 shows a plan view of the cap from FIG. 5
    FIG. 6a shows a plan view of a cap in an alternative embodiment
    FIG. 6b shows a detail from FIG. 6a
    1 shows a section through a cylindrical electrode body 100 for an electrode for electrochemical machining of a workpiece, which consists of a wear-resistant and highly electrically conductive material, such as brass. The actual electrode surface that is used for machining the workpiece comprises structures 102, which have corresponding elevations 103 and depressions 104. In the present example, the electrode body 100 has a recess 101 concentric with the longitudinal axis 105, so that the electrochemically active electrode surface is annular. This is shown for example in FIG. 1a. It can be seen that the structures 102 are formed in a spiral groove shape on the annular electrode surface and have corresponding elevations 103 and depressions 104.
    The electrode body 100 shown is preferably used for machining bearing surfaces of a fluid-dynamic thrust bearing, in whose bearing surface spiral groove-shaped structures are to be introduced. The structures 102 on the electrode body 100 have a typical texture depth of, for example, 200 to 500 micrometers. As a structure depth, the distance of the levels formed by the elevations 103 and depressions 104 is defined.
    Figures 1 and 1a show the electrode in the raw state, d. H. the insulating regions which separate the electrochemically active regions of the electrode surface from the electrochemically inactive regions of the electrode surface are also missing.
    In Figures 2 and 2a, the next step for the preparation of the electrode is shown, wherein the cylindrical electrode body 100 in the
    Substantially hollow cylindrical cap 200 is placed. The cap 200 is made of an electrically insulating material, for example plastic and preferably made of a mechanically very stable plastic, such as polyetherimide. Polyetherimide is a stable, pressure-resistant plastic that is very durable.
    The hollow cylindrical cap 200 has a bore 201. A step 202 divides the bore 201 into a larger inner diameter section which is placed on the outer circumference of the electrode 100 and a smaller diameter section which projects beyond the electrode surface. In the area of the step 202, the cap 200 also has structures 203 which form elevations 204 and depressions 205. The protrusions 204 and depressions 205 are formed complementary to the protrusions 103 and depressions 104 of the electrode body 100, in the regions in which the step 202 of the cap 200 rests on the electrode surface. The protrusions 204 of the cap 200 therefore engage in the recesses 104 of the electrode, while the protrusions 103 of the electrode body 100 engage in the recesses 205 of the cap 200, so that the cap 200 in the region of its step 202 fixed and immovable on the electrode surface of the electrode body 100 rests and the recesses 104 of the electrode body 100 are filled by the projections 204 of the cap 200 and vice versa. The depth of the structures of the cap 200 corresponds to the depth of the structures of the electrode body 100, and is, for example, 200 to 500 micrometers.
    FIG. 2 a shows the plan view of the electrode body 100 with the cap 200 placed on it, it being possible to see through the bore 201 of the cap, the underlying structures 102 of the electrode body 100.
    In FIGS. 3 and 3a, a next step of the production of the electrode is shown. Starting from the arrangement of FIG. 2, a potting aid in the form of a sleeve 207 is now placed on the cap 200. The sleeve 207 rests with its inner diameter on the outer diameter of the cap 200 and projects beyond the
    Cap 200 in the axial direction. The cavity formed by the sleeve 207 and the structured electrode body 100 is filled with a potting compound 300. The potting compound 300 is an electrically insulating plastic which penetrates into the recess 101 and the remaining depressions 104 of the electrode body 100 and fills them together with the inner wall of the sleeve 207.
    FIG. 3 a shows a plan view of the arrangement according to FIG. 3, wherein the sleeve 207 is recognized as well as the electrically insulating potting compound 300, which has filled up the free spaces between the sleeve 207 and the electrode body 100.
    FIG. 4 shows the arrangement after a next processing step. In this processing step, the sleeve 207 is removed again, for example by milling, and the material of the cap 200 and the insulating compound 300 is removed again, for example milled, except for a first plane 400, which is formed by the surface of the elevations 103 of the electrode 100 , That is, all three materials, on the one hand the metal of the elevations 103 of the electrode body 100, the remaining insulating compound 300 and the plastic of the cap 200 are visible in this plane 400. The recesses 104 of the electrode body 100 are filled radially inward by the potting compound 300 and filled in the region of the outer radius of the electrode surface by the material of the cap 200. The recess 101 of the electrode body 100 is completely filled with potting compound 300.
    FIG. 4a shows a plan view of this arrangement, wherein the elevations 103 of the electrode body 100 and the non-hatched material of the cap 200 disposed therebetween and externally, as well as the cross-hatched material of the insulating potting compound 300 are discerned. It can be seen that all spaces between the elevations 103 of the electrode body 100 are filled either by the material of the cap 200 or the material of the insulating material 300.
    FIGS. 5 and 5a now show the last processing step for producing the electrode arrangement. Here, the elevations 103 of the electrode body 100, the potting compound 300 and parts of the cap 200 are removed by an amount s up to a second level 402. This second plane 402 is therefore below the first plane 400 by the amount s. The surfaces of the non-abraded parts of the cap 200 thus still lie in the first plane 400 and thus serve as bearing surfaces 206. Radially outside the electrode surface, ie. H. radially outside the metal material of the electrode, the material of the cap 200 is also removed to the lower level 402.
    A plan view in FIG. 5 is shown in FIG. 5a. On display are the spiral-shaped, electrically conductive elevations 103 of the electrode body 100, the surface of which lies in the lower, second plane 402. Radially out of the region in which the electrically insulating potting compound 300 is located, the likewise slightly helical bearing surfaces 206 of the cap 200 arranged between the elevations 103 can be seen. The bearing surfaces 206 terminate with their radially outer side on the same diameter on which the electrically conductive projections 103 of the electrode body 100 end with its radially outer side and extend radially inward to the region of the potting compound 300. Radially outside the bearing surfaces 206 and of the electrically conductive structures 103, the outer edge of the cap 200 can be seen, the surface of which lies in the second, lower plane 402.
    For machining a workpiece, the electrode assembly is placed directly with its first plane 400 on the surface of the workpiece. An electrolyte is then passed between the second, lower level 402 of the conductive protrusions 103 and the workpiece either from radially outside to inside or from radially inside to outside and an electric current is applied between the electrode and the workpiece, whereby an electrochemical removal of the workpiece surface in the Bumps 103 takes place, while in the isolated areas, which are formed by the insulating cap 200 and the insulating material 300, no electrochemical removal takes place.
    In the workpiece, therefore, a structure is introduced, which consists of depressions, which are an image of the electrically conductive elevations 103 of the electrode 100.
    FIG. 6 shows a plan view of the cap 200 after the last processing step. The bottom of the recesses 205 of the cap 200, in which engage the protrusions 103 of the electrode body has now been removed, so that the wells have become free space and the surface of the elevations 103 is exposed. Between the free spaces 205, the support surfaces 206 can be seen, which are just like the free spaces 205, formed spirally. The width of the free spaces 205 and the bearing surfaces 206 increases from the radially inner end toward the radially outer end.
    Figure 6A shows a plan view of a modified embodiment of the cap 200 of Figure 6, in which the bearing surfaces 206 are configured differently. The radially inner end of the bearing surfaces 206 runs to a point and ends on a larger diameter than the diameter of the central bore 201. The pointed ends are not symmetrical. Although the tips of the tips lie on the centerline of the bearing surfaces 206, each side is at a different angle. Alternatively, the ends may also be formed symmetrically (not shown in the drawing). By this form of the bearing surfaces 206, the electrolyte, which is preferably supplied from the radially outside and flows radially inward, flow in the radially inner region without turbulence, so that a very good result of the electrochemical machining can be achieved because there is no jam or a Swirling of the electrolyte takes place. In the embodiment of the cap 200 shown here, the bearing surfaces 206 do not completely fill the gap between free spaces 205 for the electrically conductive structures 103. Outside the support surfaces 206, the spaces between the free spaces 205 are filled by parts of the cap 200 whose surfaces are in the same plane as the
    Surfaces of the parts of the cap 200, which are arranged radially outside the bearing surfaces.
    FIG. 6B shows the detail X of FIG. 6A in the region of the pointed end of the bearing surfaces 206. Here, the pointed, non-symmetrically formed, radially inward end of the bearing surfaces 206 can clearly be seen.
    The bearing surfaces shown here do not necessarily have to end with their radially outer end on the same diameter as the electrically conductive structures, but can also end up on a smaller or larger diameter (not shown in the drawing). Also, the bearing surfaces can end with their radially inner end on a smaller or the same diameter, as the electrically conductive structures (also not shown in the drawing).
    The advantages of the illustrated electrode assembly are a significantly increased life due to the stable material of the cap 200 and better stability of the bearing surfaces and a more accurate support.
    The bearing structures produced by means of this electrode arrangement can be produced without defects or interruptions and can extend from the inner circumference to the outer circumference of the bearing surface, without interruptions.
    It also results in a very good parallelism of the support of the electrode on the workpiece.
    List of reference numerals 100 electrode body 101 recess 102 structures 103 elevations 104 depressions 105 longitudinal axis 200 cap 201 bore 202 step 203 structures 204 elevations 205 depressions 206 support surface 207 sleeve 300 potting compound 400 plane (the elevations of the structures of the electrode before machining) 402 plane (of the elevations the structures after processing)
    claims:
    权利要求:
    Claims (16)
    [1]
    claims
    An electrode assembly for electrochemically machining a metallic workpiece, comprising a circular electrode surface having electrically conductive regions (103) and electrically insulating regions (200, 300), the electrically insulating regions (200, 300) being shaped similar to the electrically conductive regions Areas (103) and parts of the electrically insulating portions (200) in the axial direction over a plane (402) in which the surface of the electrically conductive regions (103) lie, and as bearing surfaces (206) for supporting the electrode assembly on the workpiece are formed, characterized in that the radially outer edge of the bearing surfaces (206) is arranged on a larger diameter than the radially outer edge of the electrically conductive regions (103) and the radially inner edge of the bearing surfaces (206) on the same or a larger diameter is arranged than the radially inner Edge of the electrically conductive regions (103).
    [2]
    2. An electrode assembly for electrochemically machining a metallic workpiece, having a circular electrode surface, the electrically conductive portions (103) and electrically insulating portions (200, 300), wherein the electrically insulating portions (200, 300) are shaped similar to the electrically conductive Areas (103) and parts of the electrically insulating portions (200) in the axial direction over a plane (402) in which the surface of the electrically conductive regions (103) lie, and as bearing surfaces (206) for supporting the electrode assembly on the workpiece are formed, characterized in that the radially outer edge of the bearing surfaces (206) is arranged on the same diameter, as the radially outer edge of the electrically conductive regions (103) and the radially inner edge of the bearing surfaces (206) on a larger, the the same or a smaller diameter is arranged, as the radially inner nliegende edge of the electrically conductive regions (103).
    [3]
    An electrode assembly for electrochemically machining a metallic workpiece, comprising a circular electrode surface having electrically conductive regions (103) and electrically insulating regions (200, 300), wherein the electrically insulating regions (200, 300) are shaped similar to the electrically conductive regions Areas (103) and parts of the electrically insulating portions (200) in the axial direction over a plane (402) in which the surface of the electrically conductive regions (103) lie, and as bearing surfaces (206) for supporting the electrode assembly on the workpiece are formed, characterized in that the radially outer edge of the bearing surfaces (206) is arranged on a smaller diameter than the radially outer edge of the electrically conductive regions (103) and the radially inner edge of the bearing surfaces (206) on a larger, the same or smaller diameter than the radia l inner edge of the electrically conductive regions (103).
    [4]
    4. Electrode arrangement according to one of claims 1 to 3, characterized in that the bearing surfaces (206) taper in the region of the radially inner edge and have wedge-shaped ends.
    [5]
    5. electrode assembly according to claim 4, characterized in that the wedge-shaped ends of the bearing surfaces (206) are not formed symmetrically.
    [6]
    6. Electrode arrangement according to one of claims 1 to 5, characterized in that the electrically conductive regions (103) of the electrode assembly are an image of bearing structures of a fluid dynamic thrust bearing.
    [7]
    7. Electrode arrangement according to one of claims 1 to 6, characterized in that the ratio of the surface of the electrically conductive regions (103) to the surface of the bearing surfaces (206) is between 1 and 12.
    [8]
    8. Electrode arrangement according to one of claims 1 to 7, characterized in that the electrically insulating portions (200, 300) are either completely made of a plastic or partially made of plastic and partially made of an electrically insulating potting compound.
    [9]
    9. An electrode assembly according to claim 8, characterized in that the surface of the part of the insulating regions (300), which is made of potting compound, in the same axial plane as the surface of the electrically conductive regions (103).
    [10]
    10. A method for producing an electrode assembly for the electrochemical machining of a metallic workpiece, comprising the steps of: providing an electrically conductive electrode body (100) with at least one circular electrode surface; Introducing structures (102) into the electrode surface such that bumps (103) and depressions (104) on the electrode surface result; Providing an electrically insulating cup-shaped cap (200) having a central bore (201) and an annular surface; Introducing structures (203) into the annular surface of the cap (200) with protrusions (204) and depressions (205) which are formed complementary to the elevations (103) and depressions (104) of the electrode surface, fitting and gluing the cap ( 200) on the electrode body (100) such that the annular surface of the cap (200) lies on the circular electrode surface, the complementary electrically insulating structures (203) of the cap (200) being in the spaces between the electrically conductive structures (102). the electrode body (100) come to rest, filling a free space formed by the cap (200) and the electrode surface with an electrically insulating potting compound (300), removing the material of the cap (200) and the electrically insulating potting compound (300) up to at least a first plane (400) in which the surface of the electrically conductive structures (102) of the electrode surface lies, ablating the e electrically conductive structures (102), the electrically insulating potting compound (300) and parts of the electrically insulating structures (203) of the cap (200) except for a second plane (402) which is smaller than the first plane (400) by the amount s. is such that the surface of parts of the electrically insulating structures (203) of the cap (200) by the amount s axially above the surface of the electrically conductive structures (103).
    [11]
    11. The method according to claim 10, characterized in that after the application of the cap (200) a casting aid in the form of a sleeve (207) on the cap (200) is applied, which projects beyond it in the axial direction, and wherein the through the sleeve (207) and the structured electrode body (100) formed free space with an electrically insulating potting compound (300) is filled.
    [12]
    12. The method according to claim 11, characterized in that the sleeve (207) after curing of the electrically insulating potting compound (300) is removed again before the material of the cap (200) and the electrically insulating potting compound (300) except at least the first Plane (400), in which the surface of the electrically conductive structures (102) of the electrode surface is removed, is removed.
    [13]
    13. The method according to any one of claims 10 to 12, characterized in that a cap (200) is used made of plastic,
    [14]
    14. The method according to any one of claims 10 to 13, characterized in that a cap (200) made of polyetherimide is used.
    [15]
    15. The method of claim 10, wherein the electrically conductive structures of the electrode surface and the complementary electrically insulating structures of the cap are made of a plurality of elongate straight or curved grooves.
    [16]
    16. The method according to any one of claims 10 to 15, characterized in that the elevations (204) of the electrically insulating structures (203) of the cap 200) taper at one end and have a wedge-shaped end.
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    引用文献:
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    DE102016117984A1|2016-09-23|2018-03-29|Kuntze Instruments Gmbh|Method for attaching at least two electrodes to an electrochemical measuring cell for determining the concentration of an oxidizing or reducing agent or the conductivity and other measurands in a liquid or on the surface of substances e.g. Paper, fleece, food or skin and mucous membrane|JP3339792B2|1997-02-04|2002-10-28|株式会社三協精機製作所|Electrolytic machining method and apparatus for dynamic pressure groove in dynamic pressure bearing|
    JP2005516787A|2002-02-15|2005-06-09|ミネベア株式会社|Processed electrode manufacturing method for electrolytic processing of workpiece and processed electrode manufactured by this method|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA470/2015A|AT517541B1|2015-07-15|2015-07-15|Electrode for the electrochemical processing of a metallic component and a method for its production|ATA470/2015A| AT517541B1|2015-07-15|2015-07-15|Electrode for the electrochemical processing of a metallic component and a method for its production|
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