CALIBRATION TOOL AND METHOD FOR ITS PRODUCTION
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- REISHAUER AG
- Filing Date
- 2022-01-28
- Publication Date
- 2026-05-19
Smart Images
Figure MX434235B0
Abstract
Description
CALIBRATION TOOL AND METHOD FOR THE PRODUCTION OF THE SAME Field of Invention The invention relates to a calibration tool and a method for its production according to the preamble of claim 1 and claim 10, respectively. Background of the Invention The calibration of grinding worm gears is itself a very demanding machining process in the field of generating grinding. It relies on a large number of synchronized and highly precise individual movements and is carried out using special calibration tools. For high productivity rates, full-profile rollers are used as typical rotary calibration tools for the lower module region. These rollers are characterized by combining all the profiling tasks for the flanks, heads, and feet of worm gears into a single tool. In this situation, correct adaptation to the flank geometry of the working gear is essential and leads to very limited flexibility of use. Consequently, a drawback is the lack of the possibility of correction, for example, in case of profile angle deviations. Ref. 331065 These tools, however, can achieve comparatively short calibration times. Brief Description of the Invention Printed publication DE-A-10 2009 059 201 describes a full-profile calibration roller for calibrating or profiling multi-thread grinding worms for generating grinding of small-module gears. This roller features an axially cut, groove-shaped profile with an outer coating surface covered with hard material grains and embedded profile-cut hard material segments. The calibration roller, along with the profile comb elements, is produced by metal deposition in a negative mold using a known negative machining technique. The inner surface of the mold is formed in a manner complementary to the outer coating surface of the calibration roller. With a calibration tool according to printed publication DE-A-43 39 041 for profiling two-thread cylindrical worm gears for straight gear grinding, a first calibration roller is provided, with two opposing first and second tapered flanks covered with hard material particles, and coaxial second and third calibration rollers. These three calibration rollers are subject to L7 Lnn / Zznz / E / YIAI share a common shaft or sleeve and are separated from each other by two spacer discs. With such a calibration tool, the three calibration rollers mesh with three adjacent worm gear threads, resulting in a slight increase in the calibration stroke but also a substantial reduction in stroke length. This calibration tool is relatively elaborate and expensive to produce, yet it remains unsuitable for high-precision profiling. This also means that producing high-precision flank profiles on the worm gear is not possible, which directly impacts the accuracy of the gears to be produced. The main problem with many of these different calibration techniques is that, spatially, there are always two working surfaces moving on the flank of the worm gear and the calibration tool, and in this context, these surfaces are often also composed of partial surfaces. Under these conditions of spatial movement, contact points, determined by the geometry, often occur that are not located in the axial section plane of the calibration tool. When this happens, even with the most careful arrangement of the calibration profile, it is very common for the resulting calibration and grinding quality to be inadequate. With generation grinding, it has been demonstrated that, for calibrating grinding worm gears, the well-known full-profile roller, in particular, can be used with versatile effect, as can fixed-profile rollers. In this situation, these calibration tools are used separately for different functional areas, with the diamond coating of the full-profile roller being applied in the negative electroplating process, or the corresponding diamond coating of the fixed-profile roller being applied in the positive electroplating process. The precision required for the fixed-profile roller has thus far necessitated the use of the positive electroplating process, with the possibility of subsequent reworking. In practice, in the mass production of gears, the full-profile roller has so far proven to be very suitable for profiling grinding worms. However, due to the contact of a full-profile roller with multiple threads of the grinding worm, it is not possible to correct a deviation in the profile angle. For other tooth forming tasks, which require corrections of the profile angle deviation, calibration is also very often done using what are known as fixed profile rollers. Both calibration tools only require a rotating calibration spindle and, with the use of fixed profile rollers, an additional NC shaft to pivot this calibration spindle. Although this fixed profile roller does not achieve the productivity of the full profile roller, and is also only suitable for profiling a worm thread, it is practical to achieve with this calibration tool a sufficiently large degree of pivot to symmetrically transform profile angle deviations, as well as changes in inclination, to symmetrically influence these profile angle deviations.Consequently, with this calibration tool it is possible to reliably correct a profile angle deviation incurred in the process of approximately one angular minute, which then comes into full effect if, during the profiling of a worm gear grinder with an initial diameter of, for example, approximately 300 mm, this is reduced to approximately 100 mm due to a large number of calibration movements during batch grinding. The invention is based on the objective of providing a calibration tool, based on these well-known full-profile and fixed-profile rollers, by which it is possible to profile grinding worms in an extremely productive and precise manner, and also with the possibility of correction. It is also intended that these rollers can be produced efficiently and result in a substantial increase in the service life of the calibration tool. This object is resolved in accordance with the invention by means of the features of claim 1 and claim 10, respectively. According to the invention, the calibration tool comprises two and preferably up to six profiles arranged coaxially relative to each other, and a metallic main body, in which all profile shapes are produced with the hard material particles of the profiles by a negative process with a casting compound applied to the main body. The calibration tool is produced using the known negative casting process. The high-precision nickel-diamond matrix produced in this way is then connected to the main body by means of a casting compound, or alternatively in the form of adhesives and / or other fusible materials, thus producing the calibration tool according to the invention as a single unit. The main body with the casting compounds and the nickel-diamond matrix can be configured to consist of one or two parts. With this main body, and a lightweight cast composite that inhibits vibration and therefore has a damping effect, it is possible that when in operation, interfering oscillations in the rotating spindle that receives the calibration tool are substantially reduced or even eliminated. Highly advantageous, the calibration tool profiles, arranged coaxially with each other, form at least two differently shaped coating surfaces, secured coaxially to each other, each of which is assigned a one-piece metallic main body. Therefore, this calibration tool consists of the main body, the galvanically produced nickel-diamond matrix, and the casting compound that bonds the nickel-diamond matrix to the main body. With this compact structure of the calibration tool, with the different coating surfaces formed on the outside by the profiles, the advantages of both calibration tools are achieved in different aspects, and this calibration tool can even be produced with lower manufacturing costs. These lining surfaces of the ίηη / 77Π7 / E / YΙΛΙ profiles are conical, cylindrical, and / or other shapes, and the profiles of a respective lining surface are advantageously configured as what are known as fixed-profile rollers and full-profile rollers. Consequently, with this calibration tool, highly productive and extremely precise profiling of grinding worms is possible. According to the method of the invention, the negative process involves at least one negative mold and complementary profile shapes. By galvanically applying particles of hard material using centrifugal force, it is possible to fix special particles of hard material within the base of the profile shape complementary to the negative mold. After removal of the negative mold, these particles remain predominantly on the outer radii of the corresponding profile shapes, protecting the area of the calibration tool that is particularly subject to wear during the profiling of the grinding worms, thereby increasing the overall service life of the calibration tool. The invention and its additional advantages are explained in greater detail below on the basis of illustrative embodiments and with reference to the figures. The figures show: ίηη / 77Π7 / E / YΙΛΙ Brief Description of the Figures Figure 1 A partial longitudinal section view of a calibration tool as of the prior art; Figure 2 A partial longitudinal section view of an additional calibration tool as of the prior art Figure 3 a longitudinal section with a partial view of a calibration tool according to the invention; Figure 3a a detail Al in accordance with Figure 3 as a sectional view of profiles Figure 3b a detail A2 in accordance with Figure 3 as a sectional view of profiles Figure 4 a longitudinal section with a partial view of an additional calibration tool or a rectifying worm screw respectively, in coupling during profiling; Figure 4a shows a detail A3 as a cross-sectional view of the calibration tool profile coupling on the rectifying worm gear in accordance with Figure 4; Figure 4b shows a detail, such as a cross-sectional view, of the coupling of the other calibration tool profile to the rectifying worm gear in accordance with Figure 4; and Figure 5 A longitudinal section with a partial view of the calibration tool in accordance with Figure 4. Detailed Description of the Invention Figure 1 and Figure 2 individually show a known calibration tool 6, 7, used for profiling the flanks of calibratable worm gears 1, which are in turn used to grind correspondingly configured gears. Advantageously, such calibration tools 6, 7 are suitable for gears with module ranges from 0.15 to 5 mm. The rotation axes B2, the holes 8, and the test collars 9 arranged on both sides in the shape of a cube are shown in each case. With calibration tools 6 and 7, which are configured as what are known as fixed profile rollers and full profile rollers, profiles 11.1, 11.2 and respectively 12.1, 12.2, 12.3, 12.4, are formed by profile grooves, of which the working surfaces 13 and 14 respectively are formed by opposing flanks with head regions and foot regions, and which are provided with the corresponding hard material particles 21, 22. ίηη / 77Π7 / E / YΙΛΙ Figure 3 shows a calibration tool 10, which is provided with profiles 11.1, 11.2, 12.1, 12.2, 12.3, 12.4, arranged in a coaxial orientation along axis B2. In this situation, these profiles are delimited on their outer circumference by two cladding surfaces 23, 24, one of which is approximately cylindrical and the other conical. In this situation, this conical cladding surface 24, seen in the axial cross-section view, extends at an angle δ with respect to the cylindrical surface 23. Arranged in a row on the conical surface 24 are up to four profiles 12.1, 12.2, 12.3, 12.4, each with a working surface 14 as a complete profile, and two profiles 11.1, 11.2 are arranged on the cylindrical surface 23, each with a working surface 13, as a fixed profile. Of course, it is possible for the number of profiles to be configured differently as required, and therefore also the working surfaces 13 and 14 and / or the shape of surfaces 23, 24, of this calibration tool 10. Consequently, within the aspect of the invention, the calibration tool 10 may also have only three profiles 11.1, 11.2, 12.1, arranged coaxially relative to each other, wherein these three profiles are carried on the main body 19 by means of a cast compound 15. In accordance with the invention, this tool Lnn / zznz / E / YiAi calibration 10, with the multiple profiles 11.1, 11.2, 12.1, 12.2, 12.3, 12.4, comprises a metallic main body 19 with the respective surfaces 23, 24, wherein the profile shapes of these profiles 11.1, 11.2, 12.1, 12.2, 12.3, 12.4 consist of a diamond-impregnated nickel matrix, produced by a negative process, which is connected to the main body 19 by means of the casting compound 15. In this situation, after the diamond-impregnated nickel matrix has been applied to the negative mold by means of centrifugal force, and after the precise placement of the main body 19, the filling or casting of the casting compound 15 takes place in the cavity. The casting compound 15 is applied over the respective main body 19. In this situation, the casting compound 15 forms ring-shaped shoulders 18 on both sides of the profiles, so that, with the negative process, the casting compound essentially fills between the negative, unrepresented mold and the main body 19. The main body 19 is ring-shaped and comprises an outer material enclosed by the casting compound 15. Advantageously, the outer lining 20 of this main body 19 is cylindrical and therefore easily produced. However, it could also be partially conical, for example, parallel to surface 24, and contain one or more ring-shaped cutouts into which the casting compound would penetrate, thus achieving better adhesion. In this situation, the casting compound 15 consists of a mixture of synthetic resin with several suitable components, based, for example, on epoxy or polyurethane resin. Suitable adhesives can also be used. These materials generally exhibit a significantly lower density and better damping properties than metal. Therefore, compared to the known positive casting process and a metal configuration of the different profiles, it is possible to achieve a weight saving of more than 20% in the calibration tool 10. Furthermore, it is produced in such a way that it does not melt during the calibration process, and remains tough even if high temperatures occur due to grinding friction between the diamond-containing nickel outer layer 22 and the grinding worm screw 1. With respect to the part of the tool with the conical surface 24, the inclination angle δ of the working surface 14 towards the profiles 12.1, 12.2, 12.3, 12.4, formed in each case in cross section, is selected in such a way that the respective flank of each L7 Lnn / Zznz / E / YIAI of these profile teeth, as can be seen in Figure 3a, and with a predetermined engagement angle α, always forms a positive free angle φ with an imaginary line 25 perpendicular to the rotation axis B2 of the calibration tool 10. With a negative free angle φ, this flank of profile 12.3, in accordance with Detail A1, would essentially cast a shadow on the negative mold and, therefore, with the negative process, this profile could not be produced. Therefore, this free angle φ should be 2° to 5°. Because such a calibration tool 10 is also used as a high-precision tool for fine profiling, a cube-shaped test collar 16 is assigned to both sides of the main body 19, to check the roundness of the tool 10 when it is clamped to a calibration spindle of a grinding machine. Figure 3b shows detail A2 in accordance with Figure 3, in which this hard material coating is schematically shown on the working surface 13, which is provided with hard material particles 22 stochastically distributed in the nickel-diamond matrix. Furthermore, the hard material particles 21 are predominantly affixed to the head region of profiles 11.1 and 11.2 along their circumference. This arrangement can also be used with the working surfaces 14 of profiles 12.1, 12.2, 12.3, and 12.4 with the complete profile. According to the invention, special particles of hard material 21 are fixed to the base of the complementary profile shape of the negative mold (see Figure 3b) using the negative process. These special particles of hard material are gas-phase synthetic diamonds. As a result, the region of the calibration tool head 10, which is particularly subject to wear, is protected during the profiling of the worm screw 1. The hard material particles 21 applied using the negative process are preferably sized with a grain diameter in the range of 90 to 600 µm and an external shape preferably such as a tetragon, hexagon, octahedron, or dodecahedron. Consequently, the service life of the calibration tool 10 can be appreciably increased overall, because these grain diameters are larger compared to known particles. With the previous production of fixed-profile rollers 6 using the positive process, hard material particles with grain diameters of this size could only be produced with very high manufacturing effort and expense due to geometric constraints. Very advantageously, instead of conventional particles of hard material, a special type of Lnn / zznz / E / YiAi diamond, which, due to its morphology and formation, imparts a different surface pattern to the ceramic grinding worm gear being profiled and, consequently, imparts different properties to the surface of the grinding wheel workpiece. Unlike conventional diamond grains, this special type of diamond provides the flank surfaces of the grinding worm with defined grinding patterns. A material of special synthesis type IIA is used for this special type of diamond. Using the known negative casting process, by galvanic application via centrifugal force, the hard material particles 21, 22 and an additional nickel layer are transferred to the complementary profile molds of the negative mold. The main body 19 is then placed centrally and in a precise axial position within the negative mold, and the viscous casting compound 15 between them is poured in, so that the complementary profile mold is filled with the casting compound 15. As soon as this has hardened and bonded to the main body 19, the negative mold is removed, along with the metal, leaving only the main body 19 and the hardened casting compound 15, with the adhering hard material particles 21, 22 in the diamond-permeated nickel matrix, thus producing the calibration tool 10. Due to the production of the calibration tool 10 using this negative process, oscillations during the calibration procedure can be significantly reduced or even minimized, making subsequent generation rectification largely possible while avoiding so-called ghost frequencies. This is achieved primarily through the combination of the main body 19 and the lightweight cast composite 15 made of a synthetic resin mixture that dampens oscillation. Figure 4 shows a calibration tool 10, which is configured essentially the same as that shown in Figure 3, and therefore the differences are explained below. The same part numbers are used for the same components as with calibration tool 10 shown in Figure 3. This calibration tool 10' is coupled with a rectifying worm screw 1, in which the working surfaces 14 of the profiles 12.1, 12.2, 12.3, 12.4 are coupled with the complete profile, i.e., these profiles in each case perform profiling with both flanks simultaneously. According to the invention, in this situation, ίηη / 77P7 / E / YILI in Figure 4, the second embodiment is represented as a two-part calibration tool 10', as distinct from that in accordance with Figure 3. Both embodiments 10, 10' of this calibration tool, each of which is novel, can be used without distinction between processes for the same profiling of rectifying worm screws 1. In Figure 4a, in accordance with Detail 3A, the gaps between teeth 2, 3, 4, 5 of the grinding worm 1 are shown in cross section, in which profile 12.1 (and therefore the entire working surface 14) is engaged with the grinding worm in the interdental gap 2. Profiles 11.1, 11.2, of the working surface 13, pivoted outwards, are decoupled from the interdental gaps 4 and 5. Conversely, the interdental space 3 is free of profiles. With the arrangement of this calibration tool 10,10' represented in a visualization graphic, it can be seen that if the profile tooth of profile 11.1 that is not engaged collides with the profile tooth of the rectifying worm that is present in interdental space 4, then this profile tooth of profile 11.1 must be lowered, as far as possible, with adequate spacing and the same distance on both sides to the flanks of the next interdental space 5 of the rectifying worm 1. With very small module sizes, the distance between the two profiles 11.1 and 12.1 can be more than two interdental spaces. In this situation, the only limiting factor is the length of this calibration tool 10,10', which determines the travel distance required for a calibration stroke. If, on the other hand, the display image is in order, then profile 11.1 is located as far as possible at the same spacing distance to the flanks of the respective interdental space. The fixed profile and the full profile can be designed mathematically and / or graphically in accordance with known rules of tooth technology. Consequently, for the inclination angle δ of the conical veneering surface to the cylindrical surface 23, 24, it is approximately the case that the angle δ is equal to the engagement angle or minus the free angle φ. Represented in Figure 4b, as an analogous detail, is the situation when the profiles 11.1, 11.2 of the working surface 13 of the fixed profile are in coupling with the grinding worm 1. With this profiling calibration tool 10', the profiles 11.1, 11.2 are in coupling with the flanks facing each other, and profile the grinding worm 1 between the interdental spaces 4 and 5. If, in a visualization image, a collision occurs between the profile 12.1 and the flanks of the interdental space 2, then the previously determined approximate inclination angle δ must be changed in the order of + / - 1o, or the distance interval between the profiles 11.1 and 12.1 is increased in accordance with the above description. During the profiling of the grinding worm 1 with the calibration tool 10', first the part of the tool, which rotates at the calibration speed, is run with profiles 12.1, 12.2, 12.3, 12.4, configured as complete profiles, in which the coating line present in the axial section view pivots inwards with its conical virtual coating surface 24 parallel to the cylindrical grinding worm 1. When the preliminary profiling of the grinding worm 1 is finished after several calibration runs, the fine thread-by-thread profiling of the grinding worm 1 then follows with the part of the tool configured as a fixed profile. For this purpose, the cylindrical surface 23 with the two profiles 11.1 and 11.2 must also be pivoted inwards parallel to the cylindrical grinding worm 1 by means of an NC shaft. Particularly advantageous in this situation is the fact that the angles iηη / 77P7 / E / YILI of the profile, which change constantly due to profiling, can be corrected as needed relative to the grinding worm, whose diameter decreases with each calibration procedure, by means of a pivoting movement easily performed by the calibration tool 10. With the use of this novel calibration tool 10, 10', it is therefore relatively easy to carry out highly productive and also high-precision profiling during generating grinding, as well as with the possibility of correction. While the coupling of profiles 12.1, 12.2, 12.3, 12.4 as a roughing tool serves for a rapid profiling of the grinding worm gear to be ground, it is also possible, with profiles 11.1, 11.2, to produce the required intended profile of the individual threads of the worm gear very precisely and in a correctable manner. Figure 5 shows the calibration tool 10' from Figure 4, which, as mentioned, is configured to consist of two parts, and in which the profile molds of profiles 11.1, 11.2, 12.1, 12.2, 12.3, and 12.4 are produced in an analogous manner using negative processes. The subsequent introduction of a casting compound also takes place in an analogous manner. Within the scope of the invention, with this two-part calibration tool 10', it is advantageously possible not only for the main body 19, 19' to be configured in general as consisting of two parts, but also for the casting composites 15, 15' and the hard material particles 21, 22 to be made of diamond-impregnated nickel matrices. In this situation, the negative mold can be made of either one or two parts. In this situation, the main bodies 19', 19 are secured coaxially to one another and advantageously formed in each case on the outer cladding 20 parallel to the cladding surfaces 23, 24 formed by the profiles. Preferably, the main bodies 19, 19' are centered with a high degree of precision by means of a centering hole with a relief 17, and a centering collar 16, which in each case is ring-shaped, is fitted thereto with a tight fit for coaxial alignment with one another. As a result, these main bodies 19, 19' can be fitted to one another with a defined distance spacing and, for example, can be bolted in place. The rotational base surface 27 is, for this modality, the base surface for the geometric structure of all profiles 11.1, 11.2, 12.1, 12.2, 12.3, 12.4, in which the intersection point 26 between the two cladding surfaces 23, 24 must be in the Lnn / zznz / E / YiAi immediate proximity of this base surface 27. A particularly advantageous embodiment of this calibration tool 10' may consist of configuring the two-piece casting compounds 15, 15' and the hard material particles 21, 22, with the diamond-permeated nickel matrices, using different casting compounds and different hard material particles. For this purpose, the first and second parts of the calibration tool 10' can be produced separately as individual components and then screwed together. This increases the effort and cost of production, but optimized hard material particles 21, 22 and optimized casting compounds 15, 15' can be used for both working surfaces 13, 14, preferably. Consequently, within the scope of the invention, they can be used either as an optimized combined tool or separately as individual tools. Depending on the service life of the profiles in a main body 19, 19', it is possible to replace or interchange one or the other part. The invention has been adequately represented by the illustrative forms and examples described above. Of course, it can also be explained by other variations. ίηη / ζζηζ / Β / γίΛΐ The cladding surfaces of the profiles can be configured as conical, cylindrical, and / or other shapes, and the profiles of a respective cladding surface can be configured as fixed-profile rollers or full-profile rollers. Consequently, profiles arranged coaxially relative to each other can form more than two differently shaped cladding surfaces on the outside, for example, one cylindrical surface and two conical surfaces, each with a different inclination angle δ, of which the profiles of the cylindrical cladding surface can be configured as fixed-profile rollers, and the others as full-profile rollers. List of reference symbols 1 Rectifying worm gear 2 First interdental space (according to detail 3A) 3 Second interdental space (= free space) 4 Third interdental space Fourth interdental space Fixed profile roller Full profile roller Drilling Trial collar Calibration tool with main body of a Lnn / zznz / E / YiAi part 'Calibration tool with two-part main body .1 First profile of a fixed profile .2 Second profile of a fixed profile 12.1 First profile of a complete profile 12.2 Second profile of a complete profile 12.3 Third profile of a complete profile 12.4 Fourth profile of a complete profile Fixed profile work surfaces Full-profile work surfaces Casting compound ' Casting compound Centering collar Centering hole with a beadlock Ring-shaped shoulder Main body ίηη / 77Π7 / Ε / ΥΙΛΙ 19' Main Body 19'' Main Body 20 Coating surface, cylindrical 20' Coating surface, conical 21 Hard material particles 22 Hard material particles in nickel-diamond matrix 23 Coating surface, cylindrical 24 Coating surface, conical Perpendicular line towards B2 Point of intersection between surfaces 23 and 24 Base surface for the geometric structure of both working surfaces B1 Screw rotation axis without rectifier B2 Calibration tool rotation axis m Module a Coupling angle δ Tilt angle φ Free angle It is hereby stated that, as of this date, the best method known to the applicant for putting the aforementioned invention into practice is the one that is clear from the present description of the invention.
Claims
1. A calibration tool, with profiles arranged coaxially relative to each other, each having a conical or similar profile shape in axial cross-section, and with working surfaces provided with particles of hard material, wherein the profiles are delimited on the outer circumference by at least one surface, characterized in that the calibration tool comprises between two and preferably six profiles arranged coaxially relative to each other, and a one- or two-part metallic main body for the entire calibration tool or for a respective coating surface, wherein the profile shapes with the particles of hard material of the profiles are produced by a negative process with a casting compound applied on the respective main body.
2. Calibration tool according to claim 1, characterized in that these profiles are configured as fixed profile rollers or full profile rollers, and their coating surface is configured in each case as conical, cylindrical and / or otherwise.
3. Calibration tool according to any of claims 1 or 2, characterized in that the profiles arranged coaxially relative to each other form on the outside two differently formed coating surfaces, wherein the profiles of one surface are configured as fixed profile rollers and those of the other as full profile rollers, wherein the profiles are provided with the corresponding working surfaces.
4. Calibration tool according to claim 3, characterized in that one coating surface is configured as cylindrical with two profiles, and as a fixed profile roller, and the other surface is configured as conical, with two or preferably four profiles, and as a full profile roller.
5. A calibration tool according to any of the preceding claims 1 to 4, characterized in that the profiles, which are arranged coaxially relative to each other, form on the exterior at least two differently shaped coating surfaces, each of which is assigned a one-part main body, which are secured coaxially to each other, or to which a one-piece main body is assigned for the entire calibration tool. 17 ίηη / ζζηζ / Β / γίΛΐ 6. Calibration tool in accordance with any of the preceding claims 1 to 5, characterized in that the outer coverings of the main body extend parallel to the respective covering surfaces formed by the profiles.
7. Calibration tool according to any of the preceding claims 1 to 5, characterized in that the outer coverings of the main body are formed as cylindrical, and the profile molds of the profiles are produced on this by means of the negative mold and the casting compound introduced into it.
8. Calibration tool according to any of the preceding claims 1 to 7, characterized in that between the two differently formed surfaces of the lining there is an angle of inclination which is selected so that the profiles, formed in cross section as profile teeth with a predetermined coupling, which form the conical lining surface, with an imaginary perpendicular line to the axis of rotation, always exhibit a positive free angle with respect to the next located flank of a respective profile tooth.
9. Calibration tool according to any of the preceding claims 1 to 8, characterized in that the adjacent working surfaces of the profiles are spaced at a distance interval with L7 Lnn / Zznz / E / YIAI 30 with respect to the base surface in such a way that, in the rectifying worm gear to be profiled, with four defined interdental spaces, the singular interdental space between the working surfaces is always free, and in this situation it is possible to pivot either the two fixed profiles or the complete profiles into the residual interdental spaces without any collision.
10. Method for producing a calibration tool according to any of claims 1 to 9, characterized in that with the negative process, with at least one negative mold and with complementary profile molds, by galvanic application of hard material particles by centrifugal force, the special hard material particles are fixed on the base of the positive mold complementary to the negative mold, and, after removal of the negative mold, remain on the outer radii of the profile molds of the profiles, and protect the region of the calibration tool particularly subject to wear during the profiling of the grinding worm.
11. Method according to claim 10, characterized in that the hard material particles applied by the negative process have conventional grain diameter dimensions and are configured with an external shape preferably as a tetragon, hexagon, octahedron or dodecahedron.
12. A method according to any of claims 10 or 11, characterized in that instead of 5 conventional particles of hard material, a type of diamond is used which, due to its morphology and formation, imprints a different surface image on the ceramic grinding screw to be profiled and, consequently, imparts different properties to the surface of the workpiece.