Involute Template Measuring Device and Measuring Method with Special-shaped Repairable Probe

Abstract

The present invention belongs to the field of precision measurement technology, and particularly relates to an involute master measurement device with a special-shaped repairable probe and a measurement method. There are 2 symmetric wedge surfaces provided on the special-shaped repairable probe; a repairable cylindrical blade is provided at the intersection of the 2 wedge surfaces, and there is a chamfer above the cylindrical blade. The involute master measurement device with a special-shaped repairable probe adjusts the perpendicularity of the measurement bus formed by the contact between the cylindrical blade and the calibration plane of the perpendicularity calibration block and the working surface of the generating guide rail, and adjusts the accurate measurement position of the special-shaped repairable probe, so as to measure the involute master. The probe of the measurement device of the present invention is simply installed, without the need to precisely adjust the height of the probe, is not sensitive to the installation position of the probe, the probe is repairable, and the measurement accuracy of the involute master tooth profile deviation is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of precision measurement, and relates to an involute template measuring device for a special-shaped repairable probe and its application in the pure-rolling generation measurement of an involute template, which is used for the pure-rolling generation measurement of a high-precision gear involute template. Background Technique

[0002] As a standard instrument for calibrating involute measuring instruments, the gear involute template has very strict requirements for the precision of both the gear template and the measuring instrument. The national standard for gear involute templates, GB / T 6467-2010, divides gear involute templates into two grades: Grade 1 and Grade 2. Among them, Grade 1 is the highest precision grade, and Grade 1 templates must be symmetrical left and right or mass-balanced. Foreign countries can provide medium and small-sized gear involute templates with a tooth profile shape deviation of Grade 1 precision (i.e., 1 μm), but their developed lengths do not meet the requirements of Grade 1 gear involute templates in China.

[0003] At present, the most commonly used and authoritative gear measuring instruments on the market are mainly coordinate measuring machines and gear measuring centers. The working principles of coordinate measuring machines and gear measuring centers are based on the coordinate method or the electronic generation method, with high measurement precision, fast speed, and powerful functions, but they have a long dimensional chain, complex structure, high manufacturing cost, and it is difficult to improve the precision. The team of Academician Wang Liding of Dalian University of Technology developed a double-roller - guide rail type gear involute template measuring and grinding device, which is designed based on the mechanical generation method, strictly follows the involute generation principle, and has no principle error. Germany and Japan have also used this generation mechanism to achieve high-precision measurement of involutes, and it is generally considered the mechanism with the highest generation precision at home and abroad, but there is a problem of difficult precise adjustment of the measuring point position.

[0004] For double-roller - guide rail type involute measuring instruments, the probe should be located within the guide rail plane, but in the actual operation process, it is very difficult to adjust the probe to the theoretical position, and this factor must be considered in the instrument structure design. The invention patent [CN200910303302.5] discloses a precise positioning method for the measuring point of an involute tooth profile measuring instrument by the generation method, which uses the tooth profile angle comparison method and the measuring point deviation trial value compensation method for the precise adjustment of the measuring point position in the generation method measuring instrument. The adjustment precision of the measuring point position is ±10 μm, and there is still a large room for improvement in the adjustment precision.

[0005] Considering that the laser measurement method is not applicable to the measurement of non-reflective surfaces and curved surfaces, it is necessary to design an involute measurement device that uses a probe and combines the laser measurement method. This device requires a micro-displacement transfer device to transfer the micro-displacement of the probe to the laser interferometer in equal proportion. The authorized invention patent [ZL201711398299.0] discloses a laser measurement device and method for measuring the normal error of any surface, which converts the micro-displacement in the normal direction at the measurement point into the micro-displacement of the mirror spot in equal proportion, and characterizes the change in the measurement point position on the part surface through the change in the spot position. However, there is still an Abbe error in the use of this device. The authorized invention patent [ZL201910749549.3] discloses a laser measurement probe device for measuring the geometric error of any surface, which transfers the micro-displacement of the probe to the measurement target mirror at the tail of the device in equal proportion, and the laser interferometer collects the micro-displacement of the target mirror in real time. This device can be used for measuring the tooth profile deviation of a high-precision gear involute master, but it does not provide solutions to problems such as the installation and positioning of the device, the precise adjustment of the measurement point position, and the reasonable arrangement of the mirror group.

[0006] Laser measurement technology has been widely used in the field of gear measurement in recent years due to its advantages such as non-contact, rapidity, automation, and high measurement accuracy. The invention patent [ZL201810704461.5] discloses a double-base disk type gear involute master measurement system based on laser heterodyne interference, which applies the laser heterodyne interference technology to the measurement of the double-base disk type gear involute master. The laser is directly irradiated onto two base disks and the gear involute master in three beams, thus realizing high-resolution and dynamic real-time measurement. This patent provides a high-precision non-contact measurement method, but it has strict requirements for the accuracy of the base disk and the measured surface of the master, does not involve the problem of adjusting the measurement point position, and does not mention the device. The authorized invention patent [ZL202110734307.4] discloses a laser measurement device for the tooth profile deviation of a gear involute master, which integrates a double-roller - guide rail type generating mechanism and a laser measurement probe device for the geometric error of any surface, provides an installation and positioning device for the probe and the mirror group and a precise adjustment method for the measurement point position, and realizes the high-precision measurement of the tooth profile deviation of the gear involute master using the laser interference principle. This device can be used for measuring the tooth profile deviation of a high-precision gear involute master, but it is difficult to adjust the measurement point position to an accurate position, and there is a possibility of interference between the base disk and the measurement support. In addition, the contact point will wear and cannot be repaired after the ball probe is used, which may affect the measurement accuracy in subsequent use. Therefore, there is still room for improvement in this measurement device. Summary of the Invention

[0007] To solve the above problems, the present invention provides a cylindrical edge measurement device that is directly connected to the side of the generating guide rail; it will not interfere with the base disk during the measurement process, does not require precise adjustment of the probe height, is not sensitive to the installation position of the probe, and is easy to repair after the probe is worn. Among them, a cylindrical grinding tooling can be used to perform high-precision grinding on the measurement generatrix of the cylindrical edge probe. This device can be used to measure the profile deviation of the involute master gear of high-precision gears. A special-shaped repairable probe, including a cylindrical body, is characterized in that: a cylindrical edge probe is provided at one end of the cylindrical body; a connecting part is provided at the other end of the cylindrical body, and 2 symmetrical wedge-shaped surfaces are provided on the cylindrical edge probe; a repairable cylindrical edge is provided at the intersection of the 2 wedge-shaped surfaces, and there is a chamfer above the cylindrical edge.

[0008] According to the above-mentioned special-shaped repairable probe, it is characterized in that: the included angle between the 2 symmetrical wedge-shaped surfaces is 20°-150°; the chord length of the cross-section of the cylindrical edge is 0.3-1.0 mm; the straightness of the generatrix of the cylindrical edge ≤ 0.1 μm; the roughness of the cylindrical edge ≤ 100 nanometers; the connecting part provided at the other end of the cylindrical body is a screw.

[0009] An involute master gear measurement device with a special-shaped repairable probe, characterized in that it includes the above-mentioned special-shaped repairable probe, a marble platform, and 2 generating guide rails provided on the marble platform; a probe fixture adjustment block is fixedly provided on one of the generating guide rails; a probe fixture is adjustably provided on the probe fixture adjustment block, and an inductive probe rod is provided on the probe fixture; one end of the inductive probe rod is screwed to the above-mentioned special-shaped repairable probe; a master gear measurement bracket is provided between the tops of the 2 generating guide rails; a perpendicularity calibration block for adjusting the measurement position of the special-shaped repairable probe is provided on the master gear measurement bracket; the special-shaped repairable probe can be repaired using a grinding tooling.

[0010] An involute master gear measurement device with the above-mentioned special-shaped repairable probe, characterized in that: the probe fixture adjustment block is rectangular, and counterbored holes for connecting to the inner side of one of the generating guide rails are provided at both ends of the probe fixture adjustment block; a rectangular hole is provided in the center of the fixture adjustment block; a plurality of fine-tuning threaded holes passing through the upper and lower side walls of the rectangular hole are respectively provided on the upper and lower side walls of the fixture adjustment block.

[0011] According to the involute template measuring device with a special-shaped repairable probe described above, it is characterized in that: the cross-section of the probe fixture is T-shaped, and one end of the probe fixture is a rectangular block that can be set in the rectangular hole of the probe fixture adjustment block; counterbored holes are symmetrically arranged at both ends of the rectangular block; the other end of the probe fixture is provided with a probe holder with a zigzag cross-section; a clamping groove for installing an inductive probe rod is arranged on the probe holder; one end of the clamping groove is open and provided with a circular through hole for clamping a cylindrical inductive probe rod, and the other end of the clamping groove is provided with an elliptical through hole; locking threaded holes and locking through holes for adjusting and fixing the cylindrical surface knife-edge probe with the same central axis are respectively arranged on the upper and lower surfaces of the probe holder parallel to the axis of the circular through hole; the diameter of the circular through hole is larger than the outer diameter of the inductive probe rod.

[0012] According to the involute template measuring device with a special-shaped repairable probe described above, it is characterized in that: the template measuring bracket is long and strip-shaped, and two convex mounting platforms are symmetrically arranged on the upper surface of the template measuring bracket. Threaded holes are arranged on the mounting surface E of the mounting platform for screwing the perpendicularity calibration block; two mounting seats with the same width as the width of the generating guide rail are arranged on the lower surface of the template measuring bracket; the mounting surfaces F on the two mounting seats are coplanar.

[0013] According to the involute template measuring device with a special-shaped repairable probe described above, it is characterized in that: the cross-section of the perpendicularity calibration block is L-shaped, and a counterbored hole for connecting the template measuring bracket is arranged on one surface of the perpendicularity calibration block; three calibration bosses with equal spacing perpendicular to the perpendicularity calibration block are arranged on the other surface of the perpendicularity calibration block; the upper surfaces of the three calibration bosses are coplanar, and the upper surface of the calibration boss in the middle of the three calibration bosses is the calibration surface, and the calibration surface is perpendicular to the mounting surface G of the perpendicularity calibration block, and is used as the adjustment reference for adjusting the perpendicularity between the cylindrical busbar of the cylindrical surface knife-edge probe and the upper surface of the generating guide rail.

[0014] According to the involute template measuring device with a special-shaped repairable probe described above, it is characterized in that: the grinding tooling includes: a probe grinding positioning shaft for installing the special-shaped repairable probe, a probe grinding pressing plate for fixing the special-shaped repairable probe connected to the probe grinding positioning shaft, and a grinding bushing for grinding the special-shaped repairable probe.

[0015] The probe grinding positioning shaft is a stepped shaft-shaped part, with a large-diameter shaft at one end and a small-diameter shaft at the other end; on the mounting surface A on the end face of the large-diameter shaft, there are a plurality of V-shaped through grooves evenly distributed in the radial direction for positioning the special-shaped repairable probe; on the mounting surface A, there is also a grinding positioning shaft groove coaxial with the large-diameter shaft; the axis of the cylindrical body of the special-shaped repairable probe arranged in the V-shaped through groove is perpendicular to the cylindrical surface of the large-diameter shaft, and the side wall of the cylindrical surface cutting-edge probe fits with the groove surface of the V-shaped through groove; after the cylindrical surface cutting-edge probe is positioned, it does not protrude above the mounting surface A of the probe grinding positioning shaft; the small-diameter shaft is a clamping end for clamping and fixing by the three-jaw chuck of the lathe; between the V-shaped through grooves on the mounting surface A, V-shaped through groove connecting threaded holes are evenly arranged; at one end of the large-diameter shaft, there is a guide groove and a guide ring to facilitate the grinding bushing to be sleeved on the large-diameter shaft of the probe grinding positioning shaft; the cylindrical surface diameter of the cylindrical surface cutting edge of the cylindrical surface cutting-edge probe is the same as and coaxial with the large end diameter of the probe grinding positioning shaft, that is, they share the same cylindrical surface;

[0016] The probe grinding pressure plate is a ring structure. The mounting surface B of the grinding pressure plate is provided with through holes for connecting with the connecting threaded holes to connect the probe grinding positioning shaft; at the corresponding positions of the V-shaped through grooves of the probe grinding positioning shaft, there are set screw threaded holes for connecting set screws to fasten the cylindrical body of the special-shaped repairable probe; there is a probe grinding pressure plate inner hole in the middle to adjust the position of the cylindrical surface cutting edge of the cylindrical surface cutting-edge probe; the inner sleeve of the grinding bushing is sleeved on the outer diameter of the large-diameter shaft of the probe grinding positioning shaft, and through reciprocating motion, the cylindrical surface cutting edge of the cylindrical surface cutting-edge probe is ground to restore the accuracy.

[0017] A method for measuring an involute master using the involute master measuring device with a special-shaped repairable probe as described above is characterized in that it includes the following steps:

[0018] S1: Install the marble platform and the generating guide rail;

[0019] First, set the marble platform on the test bench, then make the threaded hole sides of the two generating guide rails face each other, fix the two generating guide rails on the marble platform with screws, and the two generating guide rails are parallel;

[0020] S2: Connect the probe fixture adjustment block screw to the inner side of one generating guide rail;

[0021] S3: Inside the square hole of the probe fixture adjustment block, connect the probe fixture screw to the inner side of the generating guide rail, and the end of the zigzag probe holder with the inner hole of the probe fixture faces upward.

[0022] S4: Install the special-shaped repairable probe; the special-shaped repairable probe is threadedly connected to the inductive probe rod, and the inductive probe rod is installed into the inner hole of the probe fixture; in order to accurately measure the tooth profile deviation of the involute master, the chamfered part of the cylindrical surface cutting-edge probe faces upward, and the inductive probe rod is clamped on the probe fixture by screws;

[0023] S5: Install the template measuring bracket onto the upper surfaces of the two generating guides;

[0024] Place the mounting surface F of the template measuring bracket on the working surface of the generating guide, and align the two side surfaces of the template measuring bracket with the outer side surfaces of the two generating guides 2 respectively;

[0025] S6: Install the perpendicularity calibration block onto the template measuring bracket;

[0026] The perpendicularity calibration block is installed onto the template measuring bracket by screw connection, and the calibration surface is installed on one side of the cylindrical edge probe;

[0027] S7: Adjust the perpendicularity of the measuring generatrix to the working surface of the generating guide;

[0028] Adjustment of the perpendicularity of the measuring generatrix to the working surface of the generating guide: Translate the combination of the template measuring bracket and the perpendicularity calibration block along the direction of the generating guide to make the calibration surface contact the measuring generatrix, and observe the light gap between the measuring generatrix and the calibration surface by the light gap method; Adjust the tightness of the screw in the threaded hole of the fine adjustment fixture adjustment block to adjust until there is no light gap between the calibration surface and the measuring generatrix;

[0029] S8: Remove the template measuring bracket and the perpendicularity calibration block, place the rolling assembly of the involute template so that the cylindrical edge probe contacts the template tooth profile of the rolling assembly of the involute template and is located within the measuring range. The base circle of the rolling assembly of the involute template rolls along the generating guide, generating a generating motion. Measure the tooth profile deviation of the involute template through the displacement generated after the cylindrical generatrix on the special-shaped repairable probe contacts the tooth profile of the involute template.

[0030] According to the method for measuring an involute template by the involute template measuring device with a special-shaped repairable probe, it is characterized in that: in step S1, the distance between the outermost sides of the two generating guides is 200 mm; in step S7, the perpendicularity of the measuring generatrix to the working surface of the generating guide is adjusted to be ≤ 0.5 μm.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. The special-shaped repairable probe of the present invention is arranged inside the generating guide through the probe fixture and the probe fixture adjustment block. A chamfer is provided above the edge cylindrical surface of the special-shaped repairable probe, preventing the special-shaped repairable probe from interfering with the tooth root of the template when measuring the involute template.

[0033] 2. When the present invention measures an involute template, the cylindrical generatrix of the knife-edge cylindrical surface of the special-shaped repairable probe forms a point contact with the tooth profile of the measured involute template. The cylindrical generatrix passing through this contact point is the measuring generatrix. Any point on the measuring generatrix coming into contact with the tooth profile of the involute template can achieve accurate measurement, without the need for precise adjustment of the probe height and being insensitive to the installation position of the probe, improving the measurement accuracy, greatly shortening the time for adjusting the probe position before measurement, and improving the measurement efficiency.

[0034] 3. After the special-shaped repairable probe of the present invention is worn, it can be repaired through a cylindrical surface grinding tooling. A number of V-shaped through grooves are evenly distributed along the radial direction on the cylindrical surface grinding tooling. Multiple special-shaped repairable probes can be placed on it at one time, and at the same time, a probe grinding pressure plate is used for clamping and fixing, without the need for multiple adjustments of the clamping position of the special-shaped repairable probe, improving the repair efficiency of the special-shaped repairable probe.

[0035] 4. The present invention uses the method of observing the light gap between the measuring generatrix and the calibration surface through the light gap method, and finely adjusts the tightness of the screw in the threaded hole of the fixture adjustment block to adjust so that there is no light gap between the calibration surface and the measuring generatrix to adjust the perpendicularity between the measuring generatrix and the working surface of the generating guide rail. The adjustment method of the measuring device is simple and efficient, and ensures the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The involute template measuring device with a special-shaped repairable probe and the measured template rolling assembly of the present invention;

[0037] Figure 2 The clamping schematic diagram of the special-shaped repairable probe of the present invention;

[0038] Figure 3 The structural schematic diagram of the special-shaped repairable probe of the present invention;

[0039] Figure 4 The structural schematic diagram of the probe grinding positioning shaft of the present invention;

[0040] Figure 5 The structural schematic diagram of the probe grinding pressure plate of the present invention;

[0041] Figure 6 The assembly schematic diagram of the probe grinding positioning shaft and the probe grinding pressure plate of the present invention;

[0042] Figure 7 The schematic diagram of the grinding tooling of the present invention;

[0043] Figure 8 The structural schematic diagram of the probe fixture of the present invention;

[0044] Figure 9 The structural schematic diagram of the probe fixture adjustment block of the present invention;

[0045] Figure 10 Schematic structural diagram of the template measuring bracket of the present invention;

[0046] Figure 11 Schematic structural diagram of the perpendicularity calibration block of the present invention;

[0047] Figure 12 Schematic diagram of the position adjustment of the special-shaped repairable probe of the present invention.

[0048] In the figure: 1: Marble platform; 2: Generating guide rail; 3: Rolling assembly; 4: Cylindrical edge probe; 4-1: Wedge surface; 4-2: Cylindrical generatrix; 4-3: Chamfer; 5: Probe grinding positioning shaft; 5-1: Clamping end; 5-2: V-shaped through groove; 5-3: Guide ring; 5-4: Mounting surface A; 5-5: Connecting threaded hole; 5-6: Groove; 6: Probe grinding pressure plate; 6-1: Mounting surface B; 6-2: Set screw threaded hole; 6-3: Through hole; 6-4: Pressure plate inner hole; 7: Grinding bushing; 8: Probe fixture; 8-1: Mounting surface C; 8-2: Locking threaded hole; 8-3: Probe fixture inner hole; 9: Probe fixture adjustment block; 9-1: Mounting surface D; 9-2: Fine adjustment threaded hole; 9-3: Square hole; 10: Template measuring bracket; 10-1: Mounting surface E; 10-2: Mounting surface F; 11: Perpendicularity calibration block; 11-1: Calibration surface; 11-2: Mounting surface G; 12: Inductive probe rod. Detailed implementation manners

[0049] Preferred implementation manners

[0050] Next, in combination with the drawings of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0051] As Figure 3 shown: The special-shaped repairable probe includes a cylindrical body, and a cylindrical edge probe 4 is provided at one end of the cylindrical body; a connecting portion is provided at the other end of the cylindrical body, and 2 symmetric wedge surfaces 4-1 are provided on the cylindrical edge probe 4; a repairable cylindrical edge is provided at the intersection of the 2 wedge surfaces 4-1, and there is a chamfer above the cylindrical edge.

[0052] The included angle between the 2 symmetric wedge surfaces 4-1 is 20° - 150°; the chord length of the cross-section of the cylindrical edge is 0.3 - 1.0 mm; the straightness of the generatrix of the cylindrical edge ≤ 0.1 μm; the roughness of the cylindrical edge ≤ 100 nanometers; the connecting portion provided at the other end of the cylindrical body is a screw.

[0053] As Figure 1As shown in the figure: An involute master measurement device with a special-shaped repairable probe, including a special-shaped repairable probe, a marble platform 1, and two generating guides 2 arranged on the marble platform 1; a probe fixture adjustment block 9 is fixedly arranged on one of the generating guides 2; a probe fixture 8 is adjustably arranged on the probe fixture adjustment block 9, and an inductive probe rod 12 is arranged on the probe fixture 8; one end of the inductive probe rod 12 is screwed to the special-shaped repairable probe; a master measurement bracket 10 is arranged between the tops of the two generating guides 2; a perpendicularity calibration block 11 for adjusting the measurement position of the special-shaped repairable probe is arranged on the master measurement bracket 10; the special-shaped repairable probe can be repaired using a grinding tooling.

[0054] As Figure 9 As shown in the figure: The probe fixture adjustment block 9 is rectangular, and counterbored holes for connecting to the inner side of one of the generating guides 2 are arranged at both ends of the probe fixture adjustment block 9; a rectangular hole is arranged in the center of the fixture adjustment block 9; two fine adjustment threaded holes 9-2 passing through the upper and lower side walls of the rectangular hole are respectively arranged on the upper and lower side walls of the fixture adjustment block 9.

[0055] As Figure 8 As shown in the figure: The cross-section of the probe fixture 8 is T-shaped, and one end of the probe fixture 8 is a rectangular block that can be arranged in the rectangular hole of the probe fixture adjustment block 9; a counterbored hole is symmetrically arranged at both ends of the rectangular block; the other end of the probe fixture 8 is provided with a probe holder with a zigzag cross-section; a clamping groove for installing the inductive probe rod 12 is arranged on the probe holder; one end of the clamping groove is open and provided with a circular through hole 8-3 for clamping the columnar inductive probe rod 12, and the other end of the clamping groove is provided with an elliptical through hole; locking threaded holes and locking through holes for adjusting and fixing the cylindrical edge probe 4 with the same central axis are respectively arranged on the upper and lower surfaces of the probe holder parallel to the axis of the circular through hole 8-3; the diameter of the circular through hole 8-3 is larger than the outer diameter of the inductive probe rod 12.

[0056] As Figure 10 As shown in the figure: The master measurement bracket 10 is long and strip-shaped, two raised mounting platforms are symmetrically arranged on the upper surface of the master measurement bracket 10, and threaded holes are arranged on the mounting surface E10-1 of the mounting platform for screwing the perpendicularity calibration block 11; two mounting seats with the same width as the generating guide are arranged on the lower surface of the master measurement bracket 10; the mounting surfaces F10-2 on the two mounting seats are coplanar.

[0057] As Figure 11As shown in the figure: The cross-section of the perpendicularity calibration block 11 is L-shaped. One side of the perpendicularity calibration block 11 is provided with a countersunk hole for connecting the template measuring bracket 10. The other side of the perpendicularity calibration block 11 is provided with 3 calibration bosses at equal intervals perpendicular to the perpendicularity calibration block 11. The upper surfaces of the 3 calibration bosses are coplanar. The upper surface of the calibration boss in the middle of the 3 calibration bosses is the calibration surface 11-1. The calibration surface 11-1 is perpendicular to the installation surface G11-2 of the perpendicularity calibration block 11 and is used as the adjustment reference for adjusting the perpendicularity between the cylindrical bus 4-2 of the cylindrical surface edge head 4 and the upper surface of the development guide rail 1.

[0058] As Figure 6 shown in the figure: The grinding tooling includes: a probe grinding positioning shaft 5 for installing a special-shaped repairable probe, a probe grinding pressure plate 6 connected to the probe grinding positioning shaft 5 for fixing the special-shaped repairable probe, and a grinding bushing 7 for grinding the special-shaped repairable probe.

[0059] As Figure 4 shown in the figure: The probe grinding positioning shaft 5 is a stepped shaft-shaped part. One end is a large-diameter shaft, and the other end is a small-diameter shaft. On the installation surface A5-4 on the end face of the large-diameter shaft, 6 V-shaped through grooves 5-2 for radially uniformly positioning the special-shaped repairable probe are provided. A grinding positioning shaft groove 5-6 coaxial with the large-diameter shaft is also provided on the installation surface A5-4. The axis of the cylindrical body of the special-shaped repairable probe arranged in the V-shaped through groove 5-2 is perpendicular to the cylindrical surface of the large-diameter shaft. The side wall of the cylindrical surface edge head 4 is attached to the groove surface of the V-shaped through groove 5-2. After the cylindrical surface edge head 4 is positioned, it does not protrude above the installation surface A5-4 of the probe grinding positioning shaft 5. The small-diameter shaft is the clamping end 5-1 for clamping and fixing by the lathe three-jaw chuck. V-shaped through groove connecting threaded holes 5-5 are uniformly arranged between the V-shaped through grooves 5-2 on the installation surface A5-4. A guide groove and a guide ring 5-3 are provided at one end of the large-diameter shaft to facilitate the grinding bushing 7 to be sleeved on the large-diameter shaft of the probe grinding positioning shaft 5. The cylindrical surface diameter of the cylindrical surface edge of the cylindrical surface edge head 4 is the same as and coaxial with the large end diameter of the probe grinding positioning shaft 5, that is, they share the same cylindrical surface.

[0060] As Figure 5 shown in the figure: The probe grinding pressure plate 6 is a ring structure. The installation surface B6-1 of the grinding pressure plate 6 is provided with through holes 6-3 for cooperating with the connecting threaded holes 5-5 to connect the probe grinding positioning shaft 5. At the corresponding positions of the V-shaped through grooves 5-2 of the probe grinding positioning shaft 5, set screw threaded holes 6-2 are provided to connect set screws for fastening the cylindrical body of the special-shaped repairable probe. A probe grinding pressure plate inner hole 6-4 is provided in the middle to adjust the position of the cylindrical surface edge of the cylindrical surface edge head 4. The inner ring of the grinding bushing 7 is sleeved on the outer diameter of the large-diameter shaft of the probe grinding positioning shaft 5. Through reciprocating motion, the cylindrical surface edge of the cylindrical surface edge head 4 is ground to restore the accuracy.

[0061] Method for measuring an involute template by an involute template measuring device with a special-shaped repairable probe head, comprising the following steps:

[0062] S1: Install the marble platform 1 and the generating guide rail 2;

[0063] First, set the marble platform 1 on the test bench, then place the sides with threaded holes of the two generating guide rails 2 facing each other, and screw-fix the two generating guide rails 2 on the marble platform 1. The two generating guide rails 2 are parallel;

[0064] S2: Screw-connect the probe head fixture adjusting block 9 to the inner side surface of one generating guide rail 2;

[0065] S3: Inside the square hole of the probe head fixture adjusting block 9, screw-connect the probe head fixture 8 to the inner side surface of the generating guide rail 2, and the end of the zigzag probe head holder with the inner hole 8-3 of the probe head fixture faces upward;

[0066] S4: Install the special-shaped repairable probe head; the special-shaped repairable probe head is threadedly connected to the inductive probe rod 12, and the inductive probe rod 12 is installed into the inner hole 8-3 of the probe head fixture; in order to accurately measure the tooth profile deviation of the involute template, the chamfered part of the cylindrical edge probe head 4 faces upward, and the inductive probe rod 12 is clamped on the probe head fixture 8 by screws;

[0067] S5: Install the template measuring bracket 10 on the upper surfaces of the two generating guide rails 2;

[0068] Place the installation surface F10-2 of the template measuring bracket 10 on the working surface of the generating guide rail 2, and align the two side surfaces of the template measuring bracket 10 with the outer side surfaces of the two generating guide rails 2 respectively;

[0069] S6: Install the perpendicularity calibration block 11 on the template measuring bracket 10;

[0070] The perpendicularity calibration block 11 is screw-connected and installed on the template measuring bracket 10, and the calibration surface 11-1 is installed on one side of the cylindrical edge probe head 4;

[0071] S7: Adjust the perpendicularity of the measuring generatrix 4-2 to the working surface of the generating guide rail 2;

[0072] As Figure 12 shown: Adjustment of the perpendicularity of the measuring generatrix 4-2 to the working surface of the generating guide rail 2: Translate the combination of the template measuring bracket 10 and the perpendicularity calibration block 11 along the direction of the generating guide rail 2 to make the calibration surface 11-1 contact the measuring generatrix 4-2, and observe the light gap between the measuring generatrix 4-2 and the calibration surface 11-1 through the light gap method; adjust the screws in the four threaded holes 9-2 of the fine-tuning fixture adjusting block 9 to make there be no light gap between the calibration surface 11-1 and the measuring generatrix 4-2;

[0073] In order to Figure 9Taking the perspective as an example, the positions of the four threaded holes 9-2 of the fixture adjustment block 9 can be regarded as being located in the four quadrants of the coordinate system with the center of the square hole of the probe fixture adjustment block 9 as the origin. The attitude of the probe fixture 8 is finely adjusted by the set screws to indirectly adjust the perpendicularity between the measuring bus 4-2 of the cylindrical edge probe 4 and the generating guide 2. If the light gap is in the upper half, tighten the set screws in the first or third quadrant until there is no light gap. If the light gap is in the lower half, tighten the set screws in the second or fourth quadrant until there is no light gap.

[0074] S8: Remove the template measuring bracket 10 and the perpendicularity calibration block 11, place the rolling component 3 of the involute template so that the cylindrical edge probe 4 contacts the tooth profile of the rolling component 3 of the involute template and is located within the measuring range. The base circle of the rolling component 3 of the involute template rolls along the generating guide 2, generating a generating motion. The tooth profile deviation of the involute template is measured by the displacement generated after the cylindrical bus 4-2 on the special-shaped repairable probe contacts the tooth profile of the involute template.

[0075] In the step S1, the distance between the outermost sides of the two generating guides 2 is 200 mm; in the step S7, the perpendicularity between the measuring bus 4-2 and the working surface of the generating guide 2 is adjusted to be ≤ 0.5 μm.

[0076] The marble platform 1 of the present invention serves as the installation reference for the entire measuring device. A marble platform 1 with a 00-level precision is selected. Reasonable holes are drilled on the marble platform 1 for installing 2 generating guides 2. The material of the generating guide 2 is bearing steel, and the precision of its upper and lower surfaces is obtained by lapping three generating guides 2 with alumina lapping compound with a particle size not greater than W1. The flatness of its upper and lower surfaces does not exceed 0.5 μm. One end of the cylindrical edge probe 4 is processed by wire cutting to form two symmetric wedge surfaces 4-1 with an included angle of 20° - 150°. There is a large-diameter edge cylindrical surface at the intersection of the two wedge surfaces 4-1, with a width of 0.3 - 1.0 mm. The diameter of the edge cylindrical surface is the same as and coaxial with the large end diameter of the probe grinding positioning shaft 5, and they are of the same cylindrical surface. The outer diameter of the inductive probe rod 12 is 8 mm. The inner diameter 8-3 of the designed probe fixture is slightly larger than 8 mm. Using a high-precision lapping bar of a similar specification to lap the inner hole 8-3 of the probe fixture can improve the positioning accuracy of the inductive probe rod 12 and make the clamping more stable. On the mounting surface A5-4 at the large-diameter shaft end of the probe grinding positioning shaft 5, 6 V-shaped through grooves 5-2 are arranged radially. The width of the V-shaped through grooves 5-2 is the same as the outer diameter of the cylindrical edge probe 4, which is 5 mm. A guiding ring 5-3 with a width of 0.03 mm is provided at the large-diameter shaft end to facilitate the entry of the grinding bushing 7. According to the size of the mounting surface C8-1, a square hole 9-3 is opened in the middle part of the probe fixture adjustment block 9 for the installation and adjustment of the probe fixture 8. Four fine-tuning threaded holes 9-2 are provided at the upper and lower corresponding positions of the counterbore of the probe fixture 8 to facilitate fine-tuning the attitude of the probe fixture 8 to adjust the perpendicularity between the measuring bus 4-2 of the cylindrical edge probe 4 and the working surface of the generating guide 2. The width of the generating guide 2 is 30 mm, and the distance between the outermost sides of the 2 generating guides 2 is 200 mm. According to these parameters, the length of the template measuring bracket 10 is designed to be 200 mm. The width of the two mounting surfaces F10-2 is the same as the width of the generating guide 2. The template measuring bracket 10 is made of 42CrMo material by wire cutting. After quenching, its HRC is not less than 54, and it has sufficient strength and hardness to ensure that it does not deform after bearing the perpendicularity calibration block 11. The perpendicularity calibration block 11 is the adjustment reference for adjusting the perpendicularity between the measuring bus 4-2 of the cylindrical edge probe 4 and the working surface of the generating guide 2. The perpendicularity between the calibration surface 11-1 and the working surface of the generating guide 2 is strictly controlled to be ≤0.5 μm.

[0077] Before assembling the involute template measuring device of the present invention, the working surface of the generating guide rail 2, mounting surface A5-4, mounting surface B6-1, mounting surface C8-1, the inner hole 8-3 of the probe fixture, mounting surface D9-1, mounting surface E10-1, mounting surface F10-2, calibration surface 11-1, and mounting surface G11-2 are refined. The inner hole 8-3 of the probe fixture is ground using a high-precision grinding bar to improve the positioning accuracy of the inductive probe rod 12. After grinding, the perpendicularity between the inner hole 8-3 of the probe fixture and the mounting surface C8-1 is ≤1μm; after refinement, the flatness of the upper and lower working surfaces of the generating guide rail 2 is ≤0.5μm; the flatness errors of the mounting surfaces A5-4, B6-1, C8-1, D9-1, E10-1, F10-2, and G11-2 are all ≤1μm, and the perpendicularity error between the calibration surface 11-1 and the mounting surface G11-2 is ≤0.5μm.

[0078] Refinement of the knife-edge cylindrical surface of the cylindrical knife-edge probe 4:

[0079] The cylindrical grinding tooling assembles the probe grinding positioning shaft 5, the cylindrical knife-edge probe 4, and the probe grinding pressure plate 6. The outer surface uses the grinding bushing 7 to grind the knife-edge cylindrical surface to grind out a high-precision measuring generatrix 4-2. The grinding steps are as follows:

[0080] S1: The probe grinding positioning shaft 5 is placed vertically. The grinding bushing 7 is sleeved onto the probe grinding positioning shaft 5, the cylindrical knife-edge probe 4 is installed, and the probe grinding pressure plate 6 is fixedly connected to the probe grinding positioning shaft 5 by screws; the diameter of the knife-edge cylindrical surface of the cylindrical knife-edge probe 4 is the same as and coaxial with the large end diameter of the probe grinding positioning shaft 5, and they are co-cylindrical surfaces.

[0081] S2: Adjust the position of the cylindrical knife-edge probe 4 so that its knife-edge cylindrical surface contacts the inner wall of the grinding bushing 7 and the knife-edge cylindrical surface is perpendicular to the mounting surface A5-4, and tighten the set screw to fix the cylindrical knife-edge probe 4.

[0082] S3: The three-jaw chuck of the lathe clamps the clamping end 5-1 of the cylindrical grinding tooling. Start the lathe, and synchronously grind the knife-edge cylindrical surfaces of several cylindrical knife-edge probes 4 through the grinding bushing 7 to obtain a high-precision measuring generatrix 4-2.

[0083] The above are only the preferred embodiments of the present invention and are not intended to limit the patent of the present invention. Any modifications, equivalent replacements, and improvements made within the scope of the patent of the present invention shall be included within the protection scope of the patent of the present invention.

Claims

1. An involute template measuring device with a special-shaped repairable probe, characterized in that, It includes a special-shaped repairable probe. The special-shaped repairable probe includes a cylindrical body. At one end of the cylindrical body, a cylindrical surface cutting-edge probe (4) is provided; at the other end of the cylindrical body, a connecting part is provided. On the cylindrical surface cutting-edge probe (4), two symmetric wedge-shaped surfaces (4-1) are provided; at the intersection of the two wedge-shaped surfaces (4-1), a repairable cylindrical surface cutting edge is provided, and there is a chamfer above the cylindrical surface cutting edge; the included angle between the two symmetric wedge-shaped surfaces (4-1) is 20°-150°; the chord length of the cross-section of the cylindrical surface cutting edge is 0.3-1.0 mm; the straightness of the generatrix of the cylindrical surface cutting edge ≤0.1 μm; the roughness of the cylindrical surface cutting edge ≤100 nm; the connecting part provided at the other end of the cylindrical body is a screw; a marble platform (1), two generating guides (2) provided on the marble platform (1); on one of the generating guides (2), a probe fixture adjusting block (9) is fixedly provided; on the probe fixture adjusting block (9), a probe fixture (8) is adjustably provided in position. On the probe fixture (8), an inductive probe rod (12) is provided; one end of the inductive probe rod (12) is screwed to the special-shaped repairable probe; between the tops of the two generating guides (2), a template measuring bracket (10) is provided; on the template measuring bracket (10), a perpendicularity calibration block (11) for adjusting the measuring position of the special-shaped repairable probe is provided; the special-shaped repairable probe can be repaired using a grinding tooling.

2. The involute template measuring device with a special-shaped repairable probe according to claim 1, characterized in that: The probe fixture adjusting block (9) is rectangular. At both ends of the probe fixture adjusting block (9), counterbored holes for connecting to the inner side of one generating guide (2) are provided; a rectangular hole is provided at the center of the fixture adjusting block (9); on the upper and lower side walls of the fixture adjusting block (9), a plurality of fine-adjustment threaded holes (9-2) passing through the upper and lower side walls of the rectangular hole are respectively provided.

3. The involute template measuring device with a special-shaped repairable probe according to claim 2, characterized in that: The probe fixture (8) has a T-shaped cross-section. One end of the probe fixture (8) is a rectangular block that can be arranged in the rectangular hole of the probe fixture adjusting block (9); counterbored holes are symmetrically provided at both ends of the rectangular block; at the other end of the probe fixture (8), a probe holder with a zigzag cross-section is provided; on the probe holder, a clamping groove for installing the inductive probe rod (12) is provided; one end of the clamping groove is open and provided with a circular through-hole (8-3) for clamping the columnar inductive probe rod (12), and the other end of the clamping groove is provided with an elliptical through-hole; on the upper and lower surfaces of the probe holder parallel to the axis of the circular through-hole (8-3), a locking threaded hole and a locking through-hole for adjusting and fixing the cylindrical surface cutting-edge probe (4) with the same central axis are respectively provided; the diameter of the circular through-hole (8-3) is larger than the outer diameter of the inductive probe rod (12).

4. The involute template measuring device with a special-shaped repairable probe according to claim 3, characterized in that: The template measuring bracket (10) is long strip-shaped. On the upper surface of the template measuring bracket (10), two convex mounting platforms are symmetrically provided. On the mounting surface E (10-1) of the mounting platform, threaded holes are provided for screwing the perpendicularity calibration block (11); on the lower surface of the template measuring bracket (10), two mounting seats with the same width as the generating guide are provided; the mounting surfaces F (10-2) on the two mounting seats are coplanar.

5. The involute template measuring device with a special-shaped repairable probe according to claim 4, characterized in that: The cross-section of the perpendicularity calibration block (11) is L-shaped. A countersunk hole for connecting the template measuring bracket (10) is provided on one side of the perpendicularity calibration block (11); on the other side of the perpendicularity calibration block (11), there are 3 calibration bosses with equal spacing perpendicular to the perpendicularity calibration block (11); the upper surfaces of the 3 calibration bosses are coplanar, and the upper surface of the calibration boss in the middle of the 3 calibration bosses is the calibration surface (11-1), and the calibration surface (11-1) is perpendicular to the installation surface G (11-2) of the perpendicularity calibration block (11), which is used as the adjustment reference for adjusting the perpendicularity between the cylindrical generatrix (4-2) of the cylindrical surface edge probe (4) and the upper surface of the generating guide rail (1).

6. The involute template measuring device with a special-shaped repairable probe according to claim 5, characterized in that: The grinding tooling includes: a probe grinding positioning shaft (5) for installing a special-shaped repairable probe, a probe grinding pressing plate (6) connected to the probe grinding positioning shaft (5) for fixing the special-shaped repairable probe, and a grinding bushing (7) for grinding the special-shaped repairable probe; The probe grinding positioning shaft (5) is a stepped shaft-shaped part, with a large-diameter shaft at one end and a small-diameter shaft at the other end; on the installation surface A (5-4) on the end face of the large-diameter shaft, there are multiple V-shaped through grooves (5-2) evenly distributed in the radial direction for positioning the special-shaped repairable probe; on the installation surface A (5-4), there is also a grinding positioning shaft groove (5-6) coaxial with the large-diameter shaft; the axis of the cylindrical body of the special-shaped repairable probe arranged in the V-shaped through groove (5-2) is perpendicular to the cylindrical surface of the large-diameter shaft, and the side wall of the cylindrical surface edge probe (4) fits with the groove surface of the V-shaped through groove (5-2); after the cylindrical surface edge probe (4) is positioned, it does not protrude above the installation surface A (5-4) of the probe grinding positioning shaft (5); the small-diameter shaft is the clamping end (5-1) for clamping and fixing by the lathe three-jaw chuck; V-shaped through groove connecting threaded holes (5-5) are evenly arranged between the V-shaped through grooves (5-2) on the installation surface A (5-4); at one end of the large-diameter shaft, there are a guide groove and a guide ring (5-3) to facilitate the grinding bushing (7) to be sleeved on the large-diameter shaft of the probe grinding positioning shaft (5); the cylindrical surface diameter of the cylindrical surface edge of the cylindrical surface edge probe (4) is the same as and coaxial with the large-end diameter of the probe grinding positioning shaft (5), that is, they share the same cylindrical surface; The probe grinding pressing plate (6) is a ring structure. The installation surface B (6-1) of the grinding pressing plate (6) is provided with through holes (6-3) for cooperating with the connecting threaded holes (5-5) to connect the probe grinding positioning shaft (5); at the corresponding positions of the V-shaped through grooves (5-2) of the probe grinding positioning shaft (5), there are set screw threaded holes (6-2) for connecting set screws to fasten the cylindrical body of the special-shaped repairable probe; in the middle, there is a probe grinding pressing plate inner hole (6-4) to adjust the position of the cylindrical surface edge of the cylindrical surface edge probe (4); the inner ring of the grinding bushing (7) is sleeved on the outer diameter of the large-diameter shaft of the probe grinding positioning shaft (5), and through reciprocating motion, the cylindrical surface edge of the cylindrical surface edge probe (4) is ground to restore the accuracy.

7. The method for measuring an involute template using the involute template measuring device with a special-shaped repairable probe according to claim 6, characterized in that: It includes the following steps: S1: Install the marble platform (1) and the generating guide rail (2); First, place the marble platform (1) on the test bench. Then, place the threaded hole sides of the two involute forming guides (2) facing each other, and fix the two involute forming guides (2) to the marble platform (1) with screws. The two involute forming guides 2 are parallel. S2: Connect the probe fixture adjustment block (9) to the inner side of one involute forming guide (2) with screws. S3: Inside the square hole of the probe fixture adjustment block (9), connect the probe fixture (8) to the inner side of the involute forming guide (2) with screws. The end of the zigzag probe holder with the inner hole (8 - 3) of the probe fixture faces upward. S4: Install the special-shaped repairable probe; the special-shaped repairable probe is threadedly connected to the inductive probe rod (12), and the inductive probe rod (12) is installed into the inner hole (8 - 3) of the probe fixture; in order to accurately measure the tooth profile deviation of the involute master, the chamfered part of the cylindrical edge probe (4) faces upward, and the inductive probe rod (12) is clamped on the probe fixture (8) with screws. S5: Install the master measurement bracket (10) on the upper surfaces of the two involute forming guides (2). Place the installation surface F (10 - 2) of the master measurement bracket (10) on the working surface of the involute forming guide (2), and align the two side surfaces of the master measurement bracket (10) with the outer side surfaces of the two involute forming guides 2 respectively. S6: Install the perpendicularity calibration block (11) on the master measurement bracket (10). The perpendicularity calibration block (11) is connected and installed to the master measurement bracket (10) with screws, and the calibration surface (11 - 1) is installed on one side of the cylindrical edge probe (4). S7: Adjust the perpendicularity of the cylindrical generatrix (4 - 2) to the working surface of the involute forming guide (2). Adjustment of the perpendicularity of the cylindrical generatrix (4 - 2) to the working surface of the involute forming guide (2): Translate the combination of the master measurement bracket (10) and the perpendicularity calibration block (11) along the direction of the involute forming guide (2) so that the calibration surface (11 - 1) contacts the cylindrical generatrix (4 - 2), and observe the light gap between the cylindrical generatrix (4 - 2) and the calibration surface (11 - 1) by the light gap method; adjust the tightness of the screws in the multiple threaded holes (9 - 2) of the fine adjustment fixture adjustment block (9) to make there be no light gap between the calibration surface (11 - 1) and the cylindrical generatrix (4 - 2). S8: Remove the master measurement bracket (10) and the perpendicularity calibration block (11), place the rolling assembly (3) of the involute master so that the cylindrical edge probe (4) contacts the tooth profile of the rolling assembly (3) of the involute master and is within the measurement range. The base circle of the rolling assembly (3) of the involute master rolls along the involute forming guide (2), generating an involute movement. Measure the tooth profile deviation of the involute master through the displacement generated after the cylindrical generatrix (4 - 2) on the special-shaped repairable probe contacts the tooth profile of the involute master.

8. The method for measuring an involute template using the involute template measuring device with a special-shaped repairable probe according to claim 7, characterized in that: In step S1, the distance between the outermost sides of the two involute forming guides (2) is 200 mm; in step S7, the perpendicularity of the cylindrical generatrix (4 - 2) to the working surface of the involute forming guide (2) ≤ 0.5 μm.

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