Tool measuring device, measuring probe, tool measuring instrument and method for measuring threading tools

Abstract

The invention relates to a tactile tool measuring device for an electronic measuring probe (10), which is intended for measuring threading tools (12, 12') designed for producing internal threads (62), such as taps, thread milling cutters, thread whirling cutters and / or thread formers, with a sensing unit (14) for contacting the threading tools (12, 12') to be measured during a tactile measurement and with a transmission unit (16) for transmitting a pressure and / or a deflection of the sensing unit (14) to at least one sensor (18) that detects the pressure and / or the deflection. It is proposed that the probe unit (14) shall have a flank undercut probe (20) which is provided at least for tactile measurement of flank undercuts (22) of cutting edges (24) of the threading tools (12, 12') on a circumference of the threading tools (12, 12').

Description

State of the art

[0001] The invention relates to a tactile tool measuring device according to the preamble of claim 1, an electronic measuring probe according to claim 8, a tool measuring device or tool setting and tool measuring device according to claim 9 and a method according to claim 11.

[0002] Numerous electronic measuring probes for measuring various tools are already known, such as the measuring probe from DE 16 73 849 A. Some of these are capable of measuring partial areas of threading tools designed for producing internal threads. However, the tactile measurement of the flank reliefs of cutting edges on such tools is particularly complex due to the helical rotation of the flank relief around a rotational axis of the threading tool.

[0003] The object of the invention is, in particular, to provide a generic device with advantageous properties for measuring threading tools intended for producing internal threads. This object is achieved according to the invention by the features of the independent claims, while advantageous embodiments and further developments of the invention can be found in the dependent claims. Advantages of the invention

[0004] The invention relates to a tactile tool measuring device for an electronic measuring probe, which is intended for measuring threading tools designed for producing internal threads, such as taps, thread milling cutters, thread whirling cutters and / or thread formers, with a sensing unit for contacting the threading tools to be measured during a tactile measurement and with a transmission unit for transmitting a pressure and / or a deflection of the sensing unit to at least one sensor detecting the pressure and / or the deflection.

[0005] It is proposed that the probe unit include a flank relief probe, which is designed at least for the tactile measurement of flank reliefs of the cutting edges of threading tools on one circumference of the threading tools. This advantageously enables a particularly complete and / or comprehensive measurement of the corresponding threading tools. Furthermore, a new parameter range can be advantageously made tactilely detectable.

[0006] A tactile tool measuring device is, in particular, at least a part of a device or system, preferably an electronic probe, designed to measure and / or inspect tools by having at least a part of the tactile tool measuring device, preferably at least one probe unit of the tactile tool measuring device, physically contact a tool surface of the tool to be measured. The tactile tool measuring device preferably operates tactilely, i.e., in particular by mechanical scanning, to detect dimensions, shapes, angles, etc., of the tool to be measured. The tactile tool measuring device is specifically designed to determine parameters such as diameter, length, angles, and / or contours of the tool to be measured. The electronic probe is specifically designed to detect contacts, deflections, pressures, etc.The tactile tool measuring device, in particular its sensing unit, is designed to convert the pressure and / or deflection experienced by the sensing unit into electronic signals, which can preferably then be evaluated electronically and / or using data processing. "Designed" is understood to mean, in particular, specifically programmed, designed, and / or equipped. The fact that an object is designed for a specific function is understood to mean, in particular, that the object fulfills and / or performs this specific function in at least one application and / or operating state. In particular, the sensing unit is preferably rigidly connected to the transmission unit. The transmission unit is designed, in particular, to receive the pressure and / or deflection experienced by the sensing unit and to transmit it, directly or indirectly, e.g., via further intermediate units / elements, to the sensor.The sensor can be any sensor capable of detecting pressures and / or displacements and converting them into electronic measurement signals. For example, the sensor could be a piezoelectric (force) sensor, a strain gauge, a combined force-torque sensor, an optical force and / or displacement sensor, a capacitive force and / or displacement sensor, and / or a MEMS (Micro-Electro-Mechanical Systems) force and / or displacement sensor. "Displacement" can be understood, in particular, as a tilt relative to a ground / rest state, especially that of the sensing unit.

[0007] The sensing unit can comprise one or preferably several sensing probes. The flank relief of a cutting edge of a threading tool, which can and should be detected by the flank relief probe, is formed by modifying, in particular reducing, the radial distance of the outermost cutting edge back surface, which extends spirally around an axis of rotation of the threading tool, from the axis of rotation of the threading tool (in the direction of rotation of the cutting edge back surface). In particular, the technical term "flank relief" of a cutting edge of a threading tool, familiar to those skilled in the art, refers to a targeted shaping of the cutting edge in which material behind a cutting edge of the cutting edge is chamfered and / or slightly removed. The purpose of the flank relief is, in particular, to reduce friction and / or wear during a thread-cutting process.The flank relief ensures, in particular, that only the cutting edge of the cutting tool is in direct contact with the workpiece into which the internal thread is to be cut, while a portion of the cutting edge flank / back of the cutting tool, located behind it in the intended direction of rotation of the threading tool and spiraling around a radial outer surface / circumference of the threading tool, has minimal contact or preferably no contact with the workpiece. The tactile measurement of the flank relief using the flank relief probe is specifically designed to determine the distance between the outermost cutting edge back surface / an outermost flank surface and the axis of rotation of the threading tool. This is preferably done for all flanks / backs of the threading tool.The flank back-grinding is also specifically called tooth back-grinding, whereby in particular a cutting edge together with its associated cutting edge back forms a tooth of a threading tool.

[0008] According to the invention, the flank relief probe has a sensing line or a flat, strip-shaped sensing surface, wherein the sensing line or the sensing surface is preferably designed to sweep across a cutting edge, particularly a spiral-shaped one, which has the flank relief, at least during a tactile measurement of the flank relief of one of the cutting edges of a threading tool. This advantageously allows the entire course of a flank / cutting edge to be detected without having to precisely follow the spiral pitch / thread pitch of the threading tool. In particular, the flanks / cutting edges of threading tools are generally not flat, but curved. A ball-head probe or a sensing tip would therefore be at risk of deviating from / slipping away from a radially outermost point of the flank / cutting edge and thus delivering erroneous measured values.This problem can be advantageously avoided by using a tactile line or a tactile surface extending in a flat, strip-like shape. The tactile line is preferably alignable parallel to the axis of rotation of the threading tool being measured, and in particular, aligned during the tactile measurement. The tactile surface extending in a flat, strip-like shape, in particular a long side edge of the tactile surface that laterally delimits the tactile surface, is preferably alignable parallel to the axis of rotation of the threading tool being measured, and in particular, aligned during the tactile measurement. The tactile line can have a small, two-dimensional extent. A smooth transition should preferably exist between the definition of the tactile line and the tactile surface. A particularly narrow tactile surface could thus also be referred to as a tactile line, and a somewhat wider tactile line could thus also be referred to as a tactile surface.In particular, the touch surface is rectangular or almost rectangular (e.g. with rounded corners).

[0009] Preferably, the sensing surface has a greater extension in one direction (the direction aligned parallel to the axis of rotation of the threading tool during tactile measurement), preferably at least twice as great, and preferably at least four times as great, as in another perpendicular direction (the direction aligned perpendicular to the axis of rotation of the threading tool during tactile measurement). The sensing line and / or the sensing surface is at least long enough that the helical cutting edge remains in contact with the sensing surface during rotation of the threading tool, in particular by 90°, 120°, 150°, 180°, or 360°. The sensing line and / or the sensing surface is flat in at least one spatial direction. The sensing surface is preferably flat in at least the spatial direction corresponding to one of the sensing surface's longitudinal directions.The stylus line and / or stylus surface is preferably flat, at least in the direction in which the cutting edge moves across the stylus line and / or stylus surface during tactile measurement. In particular, the threading tool is rotated during tactile measurement so that a contact point / surface between the cutting edge and the flank-grinding probe moves in a stylus direction during the tactile measurement, especially in a stylus direction parallel to the axis of rotation of the threading tool. The stylus line or stylus surface is angled, preferably at least substantially perpendicular, to a mounting plane of a probe base of the electronic probe on which the transmission unit is mounted.

[0010] According to the invention, the flank-cut stylus is formed by a plate, in particular a ceramic plate, a sapphire plate, a ruby ​​plate, or a hard metal plate. This advantageously allows for a simple and / or compact design, which preferably permits easy adjustment of the length of the stylus line or the stylus area by selecting a plate thickness. A plate is, in particular, a (double-sided) flat object with a thickness that is significantly less than its (minimum) depth and (minimum) width. In particular, the thickness of the plate is less than one-fifth, preferably one-tenth, of a minimum extent of the plate perpendicular to its thickness. In particular, the largest surfaces of the plate are shaped at least substantially identically to each other, arranged on opposite sides of the plate, and parallel to each other.In particular, the plate is a flat plate. The ceramic plate is preferably made at least predominantly, and preferably entirely, of a ceramic material. Various wear-resistant and / or fracture-resistant ceramic materials are suitable, such as aluminum oxide, silicon carbide, zirconium oxide, silicon nitride, or technical composite ceramics. The stylus line or stylus surface of the flank-cut stylus is preferably formed by a portion of a side surface, in particular a side surface perpendicular to the largest surface of the plate, preferably the end face. Sapphire and / or ruby ​​plates are advantageously particularly stable and wear-resistant. Conversely, hard metal plates are advantageously particularly cost-effective.

[0011] According to the invention, the sensing line or sensing surface of the flank-cut stylus is formed by a lateral extension of the plate, which projects in a direction parallel to a main extension plane of the plate beyond a side edge / end face of the plate. This advantageously allows for a simple, compact, and / or cost-effective design. The extension is preferably arranged in a corner region of the plate, particularly at a corner of the plate. The sensing line and / or sensing surface of the extension preferably extends parallel to at least one of the other end faces of the plate, other than the extension.A “principal extension plane” of a building unit shall in particular be understood to be a plane which is parallel to a largest side face of a smallest imaginary cuboid which just completely encloses the building unit, and in particular passes through the center of the cuboid.

[0012] Furthermore, it is proposed that the flank-grinding probe, in particular the probe plate, be mounted on the transmission unit, especially a probe mounting element of the transmission unit, in a way that allows for non-destructive replacement. This advantageously enables simple maintenance and / or repair. It also advantageously allows for the replacement of flank-grinding probes, especially probe plates. Advantageously, different probe plates with varying thicknesses, sensing lines, sensing surfaces, and / or extensions can be used flexibly for the probe unit. This advantageously allows probe units to be provided for different types and / or sizes of threading tools. For example, probe plates of different thicknesses can be used for different thread pitches of threading tools.The phrase "non-destructively interchangeable" means, in particular, that disassembling the two objects from each other and assembling them together does not result in any damage to either object that could significantly impair its function, and / or that neither object undergoes significant deformation during disassembly and assembly, and / or that no adhesive layers, welds, solder joints, or the like need to be damaged, separated, and / or destroyed during disassembly and assembly.

[0013] The probe unit according to the invention alternatively comprises a further probe, designed separately from the flank-grind probe, which is provided for the tactile measurement of at least one geometry of the threading tools that differs from the flank-grind probe. This advantageously enables a particularly comprehensive tactile measurement of the threading tools. Advantageously, in addition to the flank-grind probe, other geometries of the threading tools, which the flank-grind probe cannot access, can also be measured. In particular, the further probe is designed differently from the flank-grind probe. Specifically, the further probe has a sensing contact surface that differs from that of the flank-grind probe. Specifically, the further probe has a sensing contact surface that differs from a sensing line and from a flat, strip-shaped sensing surface.In particular, the tactile contact surface of the additional button may be curved.

[0014] If the additional probe has at least one sensing point or at least one sensing surface whose sensing direction is at least substantially perpendicular to a sensing direction of the sensing line or the sensing surface of the flank-cut probe, a particularly compact and / or versatile probe unit can advantageously be provided. The term "substantially perpendicular" here is intended to define, in particular, an orientation of a direction relative to a reference direction, wherein the direction and the reference direction, especially when viewed in a projection plane, enclose an angle of 90° and the angle has a maximum deviation of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°. The sensing direction of the sensing surface of the flank-cut probe is preferably perpendicular to its sensing surface.The sensing direction of the sensing surface of the flank-backed probe is preferably perpendicular to its sensing line and at the same time perpendicular to the end face of the plate.

[0015] It is further proposed that the additional probe have a probe head that is at least substantially spherical, which is specifically designed to measure the flutes of the threading tools and / or the spiral grooves between axially adjacent cutting edges of the threading tools. This advantageously allows for a particularly compact and / or versatile probe unit. Advantageously, in addition to the flank relief, other geometries of the threading tools can also be measured, which the flank relief probe cannot access. A substantially spherical probe head is understood to mean spherical probe heads as well as other curved probe heads that resemble a sphere, e.g., ellipsoids or ovoids. The flutes of the threading tools are generally arranged in front of the cutting edges in the direction of rotation of the threading tools.The spiral grooves of threading tools typically separate adjacent cutting edges and adjacent cutting edge backs from each other in the direction of the rotation axes of the threading tools.

[0016] Furthermore, it is proposed that the transmission unit has a common transmission element designed to transmit pressures and / or deflections from the edge-grinding probe and the other probe to the sensor. This advantageously allows for a compact and / or cost-effective design. For example, a common sensor can be advantageously used for both probes of the unit. The edge-grinding probe is connected indirectly, e.g., at least via the probe mounting unit, or directly to the transmission element. The other probe is connected indirectly or directly to the transmission element. The sensor is connected indirectly or directly to the transmission element. In particular, only one of the two probes of the unit is in use at any given time. The other probe remains inactive until then.

[0017] If the additional probe is arranged in an axial extension of the common transmission element, and if the flank-cut probe is arranged laterally to the axial direction of the common transmission element, a high degree of compactness and / or high flexibility can advantageously be achieved. The axial direction of the common transmission element is, in particular, at least substantially parallel to a principal extension direction of the common transmission element. The axial direction of the common transmission element is, in particular, at least substantially parallel to a principal extension direction of the additional probe. The axial direction of the common transmission element is, in particular, at least substantially perpendicular to a principal extension direction of the flank-cut probe, and especially at least to the extension of the flank-cut probe.The term "essentially parallel" here refers in particular to an alignment of a direction relative to a reference direction, especially in a plane, wherein the direction has a deviation from the reference direction of in particular less than 8°, advantageously less than 5° and particularly advantageously less than 2°.

[0018] Additionally, it is proposed that the flank-bevel probe form an auxiliary probe, which can be attached to a main probe formed by the auxiliary probe and / or to a transmission element connected to the auxiliary probe via a non-destructively removable mounting, such as a clamp or positive-lock mounting, or via a non-destructively removable mounting, such as gluing or welding. This advantageously allows for a high degree of flexibility. Furthermore, it allows for the advantageous retrofitting of existing measuring probes and / or tool measuring devices.The phrase "non-destructively detachable" from one object is to be understood in particular as meaning that disassembling the two objects from each other does not lead to any damage to either object that could significantly impair its function, and / or that neither object undergoes any significant deformation during disassembly, and / or that no adhesive layers, welds, solder joints or the like need to be damaged, separated and / or destroyed during disassembly.The fact that an object is "not non-destructively detachable" from another object is to be understood in particular as meaning that disassembling the two objects from each other leads to damage to one of the objects, which can significantly impair a function of the objects and / or that at least one of the objects undergoes significant deformation during disassembly and / or that an adhesive layer, weld, solder joint or the like must be damaged, separated and / or destroyed during disassembly.

[0019] Furthermore, the electronic probe is combined with the tactile tool measuring device, which includes a sensor that detects the pressure and / or deflection of the probe unit, and / or a tool measuring device or a tool presetting and tool measuring device, at least for the measurement of threading tools intended for producing internal threads, such as taps, thread milling cutters, thread whirling tools, and / or thread formers, with at least the electronic probe and with a probe base in which the sensor of the electronic probe, which detects the pressure and / or deflection of the probe unit, is at least partially arranged. This advantageously enables a particularly complete and / or comprehensive measurement of the corresponding threading tools. Advantageously, this allows a new parameter range to be tactilely detectable for tool measuring devices or tool presetting and tool measuring devices with electronic probes.A "tool measuring device" is understood to mean, in particular, a device that is designed to detect at least one length, at least one angle, at least one contour, and / or at least one external shape of a tool, at least partially, preferably completely, by tactile means. The tool measuring device is preferably based on tactile measuring methods for tools. In addition to the electronic measuring probe, the tool measuring device may also include devices for camera-based and / or image analysis-based optical measuring methods for tools.

[0020] If the tool measuring device or tool presetting and measuring device has a holding device for the threading tool, which is designed to rotate the threading tool at least to the point where at least the entire circumference of the cutting edge is swept by the flank-grinding probe of the electronic measuring probe, then advantageous and, in particular, easily automated measurement of threading tools can be achieved. The holding device is specifically designed to hold the threading tool upright. The holding device is specifically designed to allow controlled (precise) rotation of the upright threading tool about its axis of rotation. The tool measuring device or tool presetting and measuring device specifically includes a control and / or regulating unit.The control unit is preferably designed to control at least one movement of the push button and / or the holding device. The control unit is preferably designed to record, evaluate, and / or output the sensor's measurement signals. A "control unit" is understood to be, in particular, a unit with at least one control electronics module. "Control electronics" is understood to be, in particular, a unit with a processor, an electronic data storage device, and an operating program stored in the data storage device.

[0021] Furthermore, a method for measuring threading tools intended for producing internal threads using a tactile tool measuring device is proposed. During the tactile measurement, the threading tool to be measured is contacted by the probe unit, and any resulting pressure and / or deflection of the probe unit is transmitted via the transmission unit to the sensor that detects the pressure and / or deflection. The probe unit includes a flank relief probe, which tactilely measures at least the flank reliefs of the cutting edges of the threading tools on a circumference of the threading tools. This advantageously enables a particularly complete and / or comprehensive measurement of the corresponding threading tools.This makes it advantageous to be able to tactually detect a new parameter range for tool measuring devices or tool presetting and tool measuring devices with electronic measuring probes.

[0022] In this context, it is proposed that at least one additional geometry of the threading tools, different from the flank relief, be measured by a different probe of the tactile tool measuring device, with pressures and / or deflections detected by the additional probe being transmitted to the same sensor. This advantageously allows for high compactness and / or high efficiency, particularly cost efficiency. The tool measuring device or the tool presetting and tool measuring device is specifically designed to manipulate the probe unit accordingly, in particular to move it so that the appropriate probe for each successively measured geometry of the threading tool is brought into contact with that geometry.

[0023] Furthermore, it is proposed that, for the tactile measurement of the threading tool, the flank relief probe is first pressed against a cutting edge of the threading tool. Then, while the flank relief probe is in contact, the threading tool is rotated at least far enough that the probe covers at least the entire circumference of the cutting edge, and the resulting deflection of the probe is detected by the sensor. This advantageously enables a reliable and / or easily automated measurement of the radial relief of the teeth of threading tools.

[0024] If, during the passage of the flank-bevel probe over the cutting edge, the flank-bevel probe remains stationary in the direction of a rotational axis of the threading tool being measured, a particularly simple measurement program sequence can be advantageously achieved.

[0025] Alternatively, if the flank-bevel probe is moved synchronously parallel to a rotational axis of the threading tool to be measured, corresponding to the thread pitch of the threading tool, in particular the cutting edge, while the cutting edge back is being swept by the flank-bevel probe, a particularly precise and / or operationally reliable measurement of the threading tools can be achieved.

[0026] The tool measuring device, the measuring probe, the tool measuring instrument, and the method according to the invention are not limited to the application and embodiment described above. In particular, the tool measuring device, the measuring probe, the tool measuring instrument, and the method according to the invention may, to achieve a functionality described herein, comprise a different number of individual elements, components, process steps, and units than the number specified herein. Drawings

[0027] Further advantages will become apparent from the following description of the drawings. The drawings illustrate an embodiment of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0028] They show: Fig. 1a a schematic side view of a threading tool designed as an example of a tap, Fig. 1b a schematic sectional view through part of a machining area of ​​the threading tool, Fig. 1c a schematic side view of an exemplary threading tool designed as a thread milling cutter during the production of an internal thread in a bore, Fig. 2a a schematic perspective view of part of a tool measuring device with an electronic measuring probe comprising a tactile tool measuring device, Fig. 2b a schematic side view of the part of the tool measuring device and Fig. 3 a schematic flowchart of a procedure for measuring the threading tools using the tool measuring device and the electronic measuring probe. Description of the exemplary embodiment

[0029] The Fig. 1a, Fig. 1b and Fig. Figures 1c show views of threading tools. Fig. Figure 1a shows a side view of a threading tool 12 perpendicular to a rotational axis 70 of the threading tool 12 and the Fig. Figure 1b shows a sectional view of a section through the same threading tool 12 in a Fig. 1a, plane A shown. The threading tool 12 is designed as a tap. Fig. Figure 1c schematically shows another threading tool 12' during the machining of a workpiece 74. The additional threading tool 12' cuts an internal thread 62 into a bore 76 of the workpiece 74. The additional threading tool 12' is designed as a thread milling cutter. Other conceivable threading tools include thread whirlers or thread formers. The threading tools 12, 12' are intended for producing the internal threads 62. To produce the internal threads 62, the threading tools are rotated within a bore 76 in a direction of rotation 78 about its respective axis of rotation 70, thereby machining the inner walls of the bore 76. The threading tools 12, 12' have cutting edges 24 for this purpose. Chip flutes 46 are arranged in front of the cutting edges 24 of the threading tools 12, 12' in the direction of rotation 78. Cutting edges 28 (also called flanks) are arranged behind the cutting edges 24 in the direction of rotation 78.The cutting edges 28 extend spirally around a circumference of the respective threading tool 12, 12' (cf. . Fig. 1a). Each of the cutting edges 28 has a flank undercut 22 (cf. Fig. 1b) In the direction of the axis of rotation 70, spiral grooves 48 are arranged / formed between the cutting edges 24 and / or between the cutting edges 28. The spiral grooves 48 and / or the cutting edges 28 each have a thread pitch 72. The threading tools 12, 12' are generally shank tools with a machining area 80 comprising the cutting edges 24 and with a tool shank 82 without cutting edges 24, which serves to fasten the threading tool 12, 12' in a holder, e.g., of a machine tool.

[0030] The Fig. 2a and Fig. Figure 2b shows various views of a part of a tool measuring device 60 that includes an electronic measuring probe 10. Alternatively, the part shown could also belong to a tool presetting and tool measuring device. The tool measuring device 60 is intended for measuring threading tools 12, 12'. The tool measuring device 60 includes the electronic measuring probe 10. The tool measuring device 60, in particular the electronic measuring probe 10, has a probe base 64. The electronic measuring probe 10 is connected to the rest of the tool measuring device 60 via the probe base 64. The electronic measuring probe 10 has a sensor 18. The sensor 18 is arranged in the probe base 64. Alternatively, the electronic sensor 18 could also be arranged on the probe base 64. The sensor 18 is designed to detect pressure acting on a button unit 14 and / or a deflection of the button unit 14.

[0031] The electronic measuring probe 10 has a tactile tool measuring device 58. The tactile tool measuring device 58 has the probe unit 14. The probe unit 14 is provided for contacting the threading tools 12, 12' to be measured, in particular at least the cutting edges 28 of the threading tools 12, 12' to be measured, during a tactile measurement. The probe unit 14 has a flank relief probe 20. The flank relief probe 20 is provided for tactile measurement of the flank reliefs 22 of the cutting edges 24 of the threading tools 12, 12' on a circumference of the threading tools 12, 12'. The flank relief probe 20 has a sensing line 26. Alternatively, instead of a tactile line 26, a flat, strip-shaped tactile surface 26 could be formed by the flank-beveled tactile probe 20.The probe line 26 is designed to trace the spiral cutting edge 28 of the cutting edge 24 of one of the threading tools 12, 12', which has the slope reduction 22, over the spiral cutting edge 28 of the cutting edge 24, which has the slope reduction 22, during the tactile measurement of the slope reduction 22. The probe line 26 is designed to be pressed against the spiral cutting edge 28 of the cutting edge 24, which has the slope reduction 22, during the tactile measurement of the slope reduction 22, e.g., by moving the probe base 64. The tool measuring device 60 has a holding device 66 for the threading tools 12, 12'. The holding device 66 is designed to rotate the threading tool 12, 12' at least as far as necessary while the flank relief probe 20 of the electronic measuring probe 10 is in contact with a cutting back 28 of the threading tool 12, 12', so that at least one entire circumferential extent 68 (cf. . Fig. 1b) of the cutting back 28 is swept over by the flank undercut probe 20.

[0032] The flank-cut stylus 20 is formed by a plate. The plate is a ceramic plate. The plate has a lateral extension 30. The stylus line 26 of the flank-cut stylus 20 is formed by the lateral extension 30 of the plate. The lateral extension projects in a direction parallel to a principal plane of extension of the plate beyond an end face 32 of the plate. The lateral extension 30 is arranged in a corner region of the plate.

[0033] The tactile tool measuring device 58 has a transmission unit 16. The transmission unit 16 is designed to transmit pressures acting on the probe unit 14 and / or deflections of the probe unit to the sensor 18. The transmission unit 16 establishes a mechanical connection between the probe unit 14 and the sensor 18. The transmission unit 16 includes a probe mounting element 34. The plate is mounted on the probe mounting element 34 of the transmission unit 16 in a non-destructively replaceable manner. The plate is screwed to the probe mounting element 34 by means of a screw.

[0034] The probe unit 14 has a further probe 36. The further probe 36 is configured differently from the flank-grinding probe 20. The further probe 36 is configured separately from the flank-grinding probe 20. The further probe 36 is intended for tactile measurement of one or more geometries of the threading tools 12, 12', each of which is different from the flank-grinding 22. The further probe 36 is intended, among other things, for measurement of the spiral grooves 48 and / or the clamping flutes 46. The further probe 36 has a spherical probe head 44. The spherical probe head 44 is designed to plunge into the flutes 46 of the threading tools 12, 12' and / or into the spiral grooves 48 between axially adjacent cutting backs 28 of the threading tools 12, 12' for the purpose of measuring the threading tools 12, 12'.

[0035] The additional probe 36 forms a sensing point 38, the sensing direction 40 of which is at least substantially perpendicular to a sensing direction 42 of the sensing line 26 of the flank-grinding probe 20. The sensing direction 42 of the flank-grinding probe 20 is perpendicular to a rotation axis 70 of the threading tool 12, 12' to be measured. The sensing direction 42 of the flank-grinding probe 20 is perpendicular to an axial direction / to a principal extension direction of the probe base 64.

[0036] The transmission unit 16 has a transmission element 50. The transmission element 50, in particular an axial direction 52 of the transmission element 50, extends coaxially to an axial direction 84 of the further probe 36 / to the sensing direction 40 of the sensing point 38 of the further probe 36 and / or to an axial direction 86 of the probe base 64. The further probe 36 is arranged in an axial extension of the transmission element 50. The transmission element 50 forms a common transmission element 50 for the flank-bevel probe 20 and for the further probe 36. The common transmission element 50 is designed to transmit pressures and / or deflections exerted on the flank-bevel probe 20 and pressures and / or deflections exerted on the further probe 36 to the sensor 18. The flank-cut probe 20 is arranged laterally to the axial direction 52 of the common transmission element 50.

[0037] The flank-cut push-button 20 forms an additional push-button 88 to the basic push-button 56, which forms the additional push-button 36. The additional push-button 88 is either detachably or permanently connected to the additional push-button 36. The push-button unit 14 has a mounting 54 by which the additional push-button 88 is attached to the additional push-button 36 and / or to the transmission unit 16, in particular to the common transmission element 50. The mounting 54 is a non-destructively detachable mounting. For example, the mounting 54 is a clamp mounting, but other non-destructively detachable mounting methods are also conceivable. Alternatively, the mounting could also be a non-destructively detachable mounting, such as an adhesive bond or a weld.

[0038] The Fig.Figure 3 shows a schematic flowchart of a method for measuring threading tools 12, 12' using the tool measuring device 60, in particular using the electronic measuring probe 10. The method is specifically designed for measuring the flank relief 22 of the threading tools 12, 12' using the probe unit 14, which includes the flank relief probe 20. In at least one process step 100, the threading tool 12, 12' is inserted into the holding device 66 (upright). In at least one further process step 110, the probe line 26 of the flank relief probe 20 is pressed against a cutting edge 28 of the threading tool 12, 12'. The threading tool 12, 12' to be measured is thereby contacted by the probe unit 14.Pressing the flank-cut probe 20 against the cutting edge 28 of the threading tool 12, 12' creates pressure on the probe unit 14 and / or deflects the probe unit, in particular the flank-cut probe 20, relative to the axial direction 86 of the probe base 64. The transmission unit 16, in particular at least the transmission element 50, follows this deflection at least partially. However, the probe base 64 with the sensor 18 remains untilted. In at least one further process step 120, the pressure and / or deflection is transmitted to the sensor 18 via the transmission unit 16. The sensor 18 generates a measurement signal corresponding to a pressure value or a deflection value.In at least one further process step 130, the threading tool 12, 12' is rotated about its axis of rotation 70 by means of the holding device 66 while the flank relief probe 20 rests against the cutting edge 28. During this process, while the flank relief probe 20 rests against the cutting edge 28, the threading tool 12, 12' is rotated at least far enough that the flank relief probe 20 covers at least the entire circumferential extent 68 of the cutting edge 28. During the rotation of the threading tool 12, 12' about its axis of rotation 70, the deflection of the flank relief probe 20 and / or the pressure acting on the flank relief probe 20 changes depending on a radial height of the instantaneous contact point of the probe line 26 on the cutting edge back 28.

[0039] In at least one process step 140, the pressure and / or deflection for each rotational position of the threading tool 12, 12' is detected by the sensor 18. During the rotation of the threading tool 12, 12', as the flank-bevel probe 20 passes over the cutting edge 28, the flank-bevel probe 20 remains stationary in the direction of the rotational axis 70 of the threading tool 12, 12'. In an optional alternative process step 150, the flank-bevel probe 20 can be moved parallel to the rotational axis 70 of the threading tool 12, 12' being measured while the cutting edge 28 is being passed over by the flank-bevel probe 20 during the rotation of the threading tool 12, 12'. The tracking is carried out approximately in accordance with the thread pitch 72 of the threading tool 12, 12'. This makes the tracking synchronous with the thread pitch 72.In at least one further process step 160, a further geometry of the threading tool 12, 12', different from the flank relief 22, is measured by the further probe 36 of the tactile tool measuring device 58, which is different from the flank relief probe 20. The further probe 36 is also designed to receive and transmit pressures and / or deflections to the sensor 18. The pressures and / or deflections detected by the further probe 36 are forwarded to and registered by the same sensor 18 as the pressures and / or deflections detected and transmitted by the flank relief probe 20.In at least one further process step, the measurement signals obtained by means of the flank undercut probe 20 and in particular also the further measurement signals obtained by means of the further probe 36 are converted by the sensor into electronic data and / or output in the form of electronic data, e.g. for evaluation by means of a control and / or regulation unit 90 of the tool measuring device 60.

Claims

[1] Tactile tool measuring device (58) for an electronic measuring probe (10), which is provided for measuring threading tools (12, 12') intended for producing internal threads (62), such as taps, thread milling cutters, thread whirling cutters and / or thread formers, comprising a sensing unit (14) for contacting the threading tools (12, 12') to be measured during a tactile measurement and a transmission unit (16) for transmitting a pressure and / or a deflection of the sensing unit (14) to at least one sensor (18) detecting the pressure and / or the deflection, wherein the sensing unit (14) has a flank undercut probe (20) which is at least for tactile measurement of flank undercuts (22) of cutting edges (24) of the threading tools (12, 12') on a circumference of the threading tools (12, 12') is planned characterized bythat the flank relief probe (20) has a sensing line (26) or a flat, strip-shaped sensing surface, wherein the sensing line (26) or the sensing surface is preferably designed to sweep, at least during the tactile measurement of the flank relief (22) of one of the cutting edges (24) of one of the threading tools (12, 12'), over a cutting edge back (28) of the cutting edge (24) having the flank relief (22), in particular spiral-shaped, wherein the flank relief probe (20) is formed by a plate, and wherein the sensing line (26) or the sensing surface of the flank relief probe (20) is formed by a lateral extension (30) of the plate, which extends in a direction parallel to a principal extension plane of the plate over an end face (32) / side edge of the plate protrudesor that the probe unit (14) has a further probe (36) designed separately from the flank relief probe (20), which is provided for tactile measurement of at least one geometry of the threading tools (12, 12') that differs from the flank relief (22). [2] Tactile tool measuring device (58) according to claim 1, characterized by that the plate is a ceramic plate, a sapphire plate, a ruby ​​plate or a hard metal plate. [3] Tactile tool measuring device (58) according to claim 1 or 2, characterized by , that the flank-cut probe (20), in particular the plate, is mounted on the transmission unit (16), in particular a probe mounting element (34) of the transmission unit (16), in a non-destructively replaceable manner. [4] Tactile tool measuring device (58) according to one of the preceding claims, characterized by, that the further probe (36) has a probe head (44) that is at least substantially spherical, which is in particular intended to measure the flutes (46) of the threading tools (12, 12') and / or spiral grooves (48) between axially adjacent cutting backs (28) of the threading tools (12, 12'). [5] Tactile tool measuring device (58) according to one of the preceding claims, characterized by , that the transmission unit (16) has a common transmission element (50) which is designed to transmit pressures and / or deflections of the flank-bevel probe (20) and the further probe (36) to the sensor (18). [6] Tactile tool measuring device (58) according to claim 5, characterized by, that the further probe (36) is arranged in an axial extension of the common transmission element (50) and that the flank-backed probe (20) is arranged laterally to an axial direction (52) of the common transmission element (50). [7] Tactile tool measuring device (58) according to one of claims 1 to 4, characterized by , that the flank-cut probe (20) forms an additional probe (88) which can be attached to a basic probe (56) formed by the further probe (36) and / or to a transmission element (50) connected with the further probe (36) via a non-destructively removable mounting (54), such as a clamping mounting or a positive locking mounting, or via a non-destructively removable mounting, such as an adhesive bond or a welding bond. [8] Electronic measuring probe (10) with a tactile tool measuring device (58) according to one of the preceding claims with the sensor (18) detecting the pressure and / or the deflection of the probe unit (14). [9] Tool measuring device (60) or tool setting and tool measuring device at least for measuring threading tools (12, 12') intended for producing internal threads (62), such as taps, thread milling cutters, thread whirling cutters and / or thread formers, with at least one electronic measuring probe (10) according to claim 8 and with a measuring probe base (64) in and / or on which the sensor (18) of the electronic measuring probe (10) detecting the pressure and / or the deflection of the probe unit (14) is at least partially arranged. [10] Tool measuring device (60) or tool setting and tool measuring device according to claim 9, characterized bya holding device (66) for the threading tool (12, 12') which is designed to rotate the threading tool (12, 12') at least as far as necessary while the flank relief probe (20) of the electronic measuring probe (10) is in contact with a cutting back (28) of the threading tool (12, 12') so that at least an entire circumferential extent (68) of the cutting back (28) is swept by the flank relief probe (20). [11] Method for measuring threading tools (12, 12') intended for producing internal threads (62), such as taps, thread milling cutters, thread whirling cutters and / or thread formers, using a tactile tool measuring device (58) according to any one of claims 1 to 7, wherein the threading tool (12, 12') to be measured is contacted by a sensing unit (14) during a tactile measurement and wherein any pressure and / or deflection of the sensing unit (14) resulting therefrom is transmitted by means of a transmission unit (16) to a sensor (18) that detects the pressure and / or the deflection, wherein the sensing unit (14) has a flank relief probe (20) by means of which at least flank reliefs (22) of cutting edges (24) of the threading tools (12, 12') on a circumference of the threading tools (12, 12') are detected. 12') can be measured tactilely. [12] Method according to claim 11, characterized by, that at least one further geometry of the threading tools (12, 12') different from the flank relief (22) is measured by a further probe (36) of the tactile tool measuring device (58) different from the flank relief probe (20), wherein pressures and / or deflections detected by the further probe (36) are transmitted to the same sensor (18). [13] Method according to claim 11 or 12, characterized by, that for the tactile measurement of the threading tool (12, 12') the flank undercut probe (20) is first pressed against a cutting back (28) of the threading tool (12, 12'), then, while the flank undercut probe (20) is in contact, the threading tool (12, 12') is rotated at least so far that at least an entire circumferential extent (68) of the cutting back (28) is swept over by the flank undercut probe (20) and a deflection of the flank undercut probe (20) generated in this process is detected by the sensor (18). [14] Method according to claim 13, characterized by , that during the sweeping of the cutting edge (28) by the flank relief probe (20) the flank relief probe (20) remains stationary in the direction of a rotation axis (70) of the threading tool (12, 12') to be measured. [15] Method according to claim 13, characterized by, that during the sweeping of the cutting edge back (28) by the flank relief probe (20) the flank relief probe (20) is synchronously guided parallel to a rotation axis (70) of the threading tool (12, 12') to be measured, in accordance with a thread pitch (72) of the threading tool (12, 12'), in particular of the cutting edge back (28).

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