Intermediate double-gear axial correction value measuring device, measuring method and grouping matching method

Abstract

The invention discloses an intermediate double-gear axial correction value measuring device, a measuring method and a grouping matching method, and the measuring device comprises a bottom plate, and a first support device, a second support device, a helical gear positioning tooth, a straight gear positioning tooth, a gauge stand device and a contact indicating device which are disposed on the bottom plate. The first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are respectively provided with a contact indicating device, and the first support device, the second support device, the bevel gear positioning tooth and the straight gear positioning tooth are completely attached to the matching face of the measured middle double gear to form a circuit loop. According to the invention, the measurement efficiency can be ensured, the measurement stability can be enhanced, the measurement difficulty is reduced, the measurement efficiency is improved, the measurement repeatability and consistency are improved, and the condition that the vibration value of the whole machine exceeds the standard or the meshing part is abnormally damaged or even scrapped due to poor meshing of gears caused by inaccurate measurement is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of intermediate double gear detection, and more specifically, to an intermediate double gear axial correction value measuring device, a measuring method and a group matching method. Background Art

[0002] The two-stage star transmission gear system of a gas turbine starter reducer needs to complete the processing, matching, and measurement of the intermediate double gears. The intermediate double gears are composed of helical and spur gears. The processing of helical and spur gears involves the control of symmetry relative to the reference. The combination of the intermediate double gears involves the matching relationship and angular deviation control of the helical and spur gears. The grouping of the intermediate double gears involves group matching measurement, etc. The existing processing and assembly methods and their corresponding measurement methods have poor accuracy and are difficult to correct the measured values. In CN202210620912.3, a detection device and detection method for the angular error consistency of double gears are provided. The detection device includes a base, a gear detection mechanism is provided at one end of the base, and a gear positioning mechanism is provided at the other end of the base; the gear detection mechanism includes an optical axis, a bushing is provided at the lower end of the optical axis, and a bearing is provided at the upper end of the optical axis. The outer ring of the bearing is fixedly connected to a gear sleeve, and the outer circumference of the gear sleeve is provided with a contouring tooth and a measuring rod. A dial indicator is also provided on the side of the base, and the probe of the dial indicator is in contact with the measuring rod. This patent uses the tooth detection mechanism to simulate meshing detection with the duplex gears, and the gear positioning mechanism positions the duplex gears, so that the profiling gears and the duplex gears are at the same meshing height during each detection, controlling the variables and reducing the detection error, which is beneficial to the group matching of the gears. However, no correction measurement of the axial parameters of the gears is performed.

[0003] The assembly process involves the measurement of the axial correction value of the gear system. The gears to be measured (spur gears, helical gears) and the corresponding gears of the measuring device have high requirements for matching (requiring the two faces of the gear to fit at the same time). It is very easy to be unable to accurately judge whether the gears to be measured and the corresponding gears of the measuring device fit at the same time or the center line formed by the axis of the middle double gear journal and the support surface of the bracket device does not coincide (the journal is subjected to radial force and deflection occurs), resulting in inaccurate correction value measurement. After assembly, the gear system meshes poorly, causing abnormal wear of the gears when the starter is working or the vibration value of the whole machine exceeds the standard. In addition, the control of axial movement is generally achieved by grinding the axial size of the parts, which is very easy to cause the parts to be scrapped due to the difficulty in accurately controlling the grinding amount, which poses a great risk. Summary of the invention

[0004] The main technical problem to be solved by the present invention is to provide an intermediate double gear axial correction value measuring device and a measuring method based on the device in view of the shortcomings of the prior art in measuring the axial value of the intermediate double gear and controlling the axial movement amount.

[0005] Another technical problem solved by the present invention is to provide a method for selecting and matching intermediate double gear groups.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A device for measuring the axial correction value of an intermediate double gear comprises a base plate and a bracket device 1, a bracket device 2, a helical gear positioning tooth, a spur gear positioning tooth, a table frame device and a contact indication device installed on the base plate, wherein the bracket device 1 and the bracket device 2 are installed facing each other, and the helical gear positioning tooth and the spur gear positioning tooth are arranged between the bracket device 1 and the bracket device 2, the helical gear positioning tooth is provided with a working surface that fits with the helical teeth of the intermediate double gear, and the spur gear positioning tooth is provided with a working surface that fits with the spur teeth of the intermediate double gear;

[0008] The contact indication device comprises a power supply, an indicator light and a contactor. An indicator light is provided on the connection line between the contactor and the power supply. A left contactor and a right contactor are respectively provided on the working surfaces of the bracket device 1, the bracket device 2, the helical gear positioning teeth and the spur gear positioning teeth. The left contactor 1 on the bracket device 1 is connected to an electrode of the power supply through a line, and the right contactor 1 is connected to another electrode of the power supply through a line, so as to form a first contact indication circuit loop; the left contactor 2 on the helical gear positioning teeth is connected to an electrode of the power supply through a line, and the right contactor 2 is connected to another electrode of the power supply through a line, so as to form a second contact indication circuit loop; the left contactor 3 of the spur gear positioning teeth is connected to an electrode of the power supply through a line, and the right contactor 3 is connected to another electrode of the power supply through a line, so as to form a third contact indication circuit loop; the left contactor 4 of the bracket device 2 is connected to an electrode of the power supply through a line, and the right contactor 4 is connected to another electrode of the power supply through a line, so as to form a fourth contact indication circuit loop;

[0009] The meter frame device comprises a meter frame sleeve and a measuring meter head. The measuring meter head is installed on the bottom plate through the meter frame sleeve, and the measuring meter head can measure the spur tooth surface of the middle double gear.

[0010] Furthermore, the bracket device 1, the bracket device 2, the helical gear positioning teeth, and the spur gear positioning teeth are divided into two completely isolated parts, and the left contactor and the right contactor are respectively located in the two parts.

[0011] Furthermore, the base plate is provided with a guide rail groove, the bracket device 1 and the bracket device 2 are provided with a guide rail block matching with the guide rail groove, and the bracket device 1 and the bracket device 2 are movably connected through the guide rail block and the guide rail groove on the base plate respectively.

[0012] A method for measuring an axial correction value of an intermediate double gear, the steps comprising:

[0013] S1. Fix the shaft journals at both ends of the middle double gear marked with "Ⅰ" on the bracket device 1 and the bracket device 2 by pressing nuts, so that the spur tooth surface and the helical tooth surface of the middle double gear are aligned with the spur gear positioning teeth and the helical gear positioning teeth respectively. The nut pressing position is provided with a spring washer to ensure that the middle double gear can move along the axial direction of the measuring device during the measurement process;

[0014] S2. Use the gear end face gear as the alignment gear, adjust the axial position of the middle double gear, make the working surface of the alignment gear contact with the working surface of the helical gear positioning gear and the spur gear positioning gear at the same time, and the indicator lights on the circuit loop formed by the helical gear positioning gear, the spur gear positioning gear and the measured middle double gear are all lit, record the reading value X1 of the axial displacement of the middle double gear end face indicated by the measuring table, if the indicator light is not on, reassemble;

[0015] S3. Measure the middle double gears marked with "Ⅱ" and "Ⅲ" in turn according to the above steps, and record the readings X2 and X3 of the measuring table respectively. Take the X1' value of the middle double gear "Ⅰ" as the reference value, and the correction values ​​of the three middle double gears are:

[0016] △1=0

[0017] △2=X2-X1

[0018] △3=X3-X1.

[0019] A method for selecting and matching intermediate double gears in groups, comprising the following steps:

[0020] S1. Processing of large teeth of middle double gears;

[0021] Use a gear hobbing machine to complete the rough machining of the large external helical gear, then use external cylindrical grinding to machine the outer diameter of the helical gear, and then use a horizontal broaching machine to complete the large internal spline machining;

[0022] S2. Processing of small teeth of middle double gear;

[0023] Use a gear shaping machine to complete the rough machining of small straight teeth, then use a worm gear grinding machine to complete the straight teeth finishing, and then use a gear shaping machine to complete the large gear external spline machining;

[0024] S3. Intermediate double gear helical and spur combination;

[0025] S31. Match the large teeth of the intermediate double gear and the small teeth of the intermediate double gear according to the bilateral interference, use the intermediate double gear group matching measurement device to measure the relative angular deviation of the spur gear and the helical gear angular positioning teeth, and match the single piece symmetry in the same direction;

[0026] S32. Heat the matched large teeth and cool the small teeth in liquid nitrogen, align the tooth surfaces of the large and small teeth, quickly press fit and assemble, and keep the temperature to room temperature. After the parts are cooled, ensure that the end faces of the two pieces fit together without gaps;

[0027] S33. Use a vertical drilling machine to complete the processing of the inclined hole for the cylindrical pin for limiting the position, and complete the punching and riveting installation of the cylindrical pin according to the interference amount;

[0028] S34. Use a worm gear grinding machine to complete the finishing of large external helical teeth;

[0029] S4. Use the intermediate double gear axial correction value measuring device to measure the axial correction value;

[0030] S5. Control the axial movement of the intermediate double gears.

[0031] Furthermore, the intermediate double gear group matching measuring device comprises a base and a gear positioning device, a spring measuring rod device and a measuring table stand device installed on the base;

[0032] The gear positioning device comprises a bushing whose inner diameter matches the journal of the middle double gear, and a positioning pin one on the bushing is connected to the base;

[0033] The spring measuring rod device comprises a measuring rod mounting frame, a lever measuring tool, a positioning pin and a spring. The measuring rod mounting frame is slotted, one end of the lever measuring tool is mounted in the slot of the measuring rod mounting frame through the positioning pin, and the front end probe of the end of the lever measuring tool contacts the helical tooth surface of the middle double gear placed on the gear positioning device, and the lever measuring tool moves back and forth in the circumferential direction with the center of the positioning pin as the center of the circle, a spring is provided in the middle of the lever measuring tool to connect with the slotted wall, and a measuring table frame device is provided at the other end of the lever measuring tool;

[0034] The measuring meter frame device comprises a meter clamp, an adjustable screw and a meter head. The meter head is installed on the measuring rod mounting frame through the meter clamp and the meter head contacts the lever measuring tool. The adjustable screw passes through the meter clamp and contacts the meter head.

[0035] Furthermore, the locating pin is arranged on the contact surface where the spur teeth of the middle double gear overlap with the bushing, and the locating pin is located within the angle α formed by the intersection lines of the center of the middle double gear and the spur teeth, helical teeth working surfaces and pitch circles.

[0036] Furthermore, the intermediate double gear groupability selection and measurement step includes:

[0037] S311. The measured intermediate double gear is installed on the gear positioning device, the spur gear working surface of the intermediate double gear contacts the positioning pin, and the helical gear working surface of the intermediate double gear contacts the front end probe of the lever measuring tool;

[0038] S312. Rotate the measured middle double gear, read the meter reading at this time, and obtain the relative angular deviation of the spur gear and the helical gear angular positioning gear;

[0039] S313. Measure the relative angular deviation of the spur and helical angular positioning teeth of the other intermediate double gears in the same manner;

[0040] S316. Calculate the mutual difference δ of the angular position between the two working surfaces of the measured intermediate double gear with marked teeth, and quickly group them according to the tolerance range.

[0041] Furthermore, in the double gear group matching, the standard middle double gear is used as standard data to reset the meter measurement to zero.

[0042] Furthermore, the movement control step includes:

[0043] S51. Install the journals at both ends of the middle double gear on the front and rear bearing mounting seats, and use adjusting washers 1 and 2 to adjust the clearance, and then use bearing cover plates to seal the bearing ends;

[0044] S52. The three intermediate double gears are installed as a group, and the actual values ​​of the dimensions Ai of the three bearing mounting seats on the casing assembly and the actual values ​​of the dimensions Ai of the bearing cover plate 3 are respectively;

[0045] S53. Measure and record the three dimensions Bi when the axial clearance of the bearing is eliminated;

[0046] S54. Calculation of adjusting washers:

[0047] S54. Calculation of adjusting washer 2:

[0048] Taking the selection of a set of middle double gear adjusting washers 2 as the reference group, that is, selecting adjusting washers with a thickness of t1 from the full set of adjusting washers 1, the calculated thickness W1 of the adjusting washers 2 of the first group is:

[0049] W1=A1-B1-a1-S1-Z

[0050] Where: S1 is the measured value of t1, Z is the required axial movement control value;

[0051] The second group: W2 = W1 + (a1-a2) + (B1-B2) - △2

[0052] The third group: W3 = W1 + (a1-a3) + (B1-B3) - △3

[0053] Calculation of adjusting washer 1:

[0054] Calculate the thickness of the adjusting washer 1 of the other two gear sets:

[0055] S2=A2-B2-W2-a2-Z

[0056] S3=A3-B3-W3-a3-Z

[0057] S55. The adjusting washers selected from the complete set of adjusting washers one and two, if there is no adjusting washer with the corresponding calculated thickness in the complete set of adjusting washers, shall be ground to the calculated thickness.

[0058] Compared with the prior art, the beneficial effects are:

[0059] The present invention utilizes the bracket device 1, the bracket device 2, the helical gear positioning teeth, and the spur gear positioning teeth of the axial correction value measuring device to completely fit with the mating surface of the measured intermediate double gear, effectively solving the problem that workers can only control the measurement accuracy by experience and feel in production. This can not only ensure the efficiency of the measurement, but also enhance the measurement stability, reduce the measurement difficulty, improve the measurement efficiency, and improve the measurement repeatability and consistency. It effectively avoids the situation where the vibration value of the whole machine exceeds the standard or the meshing part is abnormally damaged or even scrapped due to inaccurate measurement due to poor meshing of the gear. In addition, the present invention effectively avoids the problem of directly matching the axial size of the parts to cause the parts to be scrapped or the movement control accuracy is low. The optional adjustment pad greatly improves the movement control accuracy and reduces the risk of parts being scrapped.

[0060] The invention has a simple manufacturing process, is easy to use, reduces the requirement on operator skills, and is more in line with actual production conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a diagram of the measurement device for the optional grouping of the intermediate double gears;

[0062] Figure 2 It is a diagram of the spring measuring rod device;

[0063] Figure 3 This is a diagram of the intermediate double gear measuring device;

[0064] Figure 4 This is the structural diagram of the helical gear positioning teeth and the spur gear positioning teeth;

[0065] Figure 5 1. It is a structural diagram of a bracket device 1 and a bracket device 2;

[0066] Figure 6 This is a schematic diagram for calculating the size chain of the intermediate double gear adjustment washer.

[0067] Among them, 1 is an intermediate double gear, 2 is a bearing mounting seat, 3 is a bearing cover plate, 4 is an adjusting washer one, 5 is an adjusting washer two, 11 is a base, 12 is a gear positioning device, 13 is a measuring table frame device, 131 is a measuring rod mounting frame, 132 is a lever measuring tool, 133 is a positioning pin two, 134 is a spring, 135 is a table head, 21 is a bottom plate, 22 is a bracket device one, 23 is a bracket device two, 24 is a helical gear positioning tooth, 25 is a spur gear positioning tooth, and 26 is a table frame device. DETAILED DESCRIPTION

[0068] The present invention will be further explained and illustrated below in conjunction with the embodiments, but the specific embodiments do not limit the present invention in any form.

[0069] Example 1

[0070] This embodiment provides a device for measuring the matching of intermediate double gear groups, such as Figure 1 , including a base 11 and a gear positioning device 12, a spring measuring rod device and a measuring table stand device 13 installed on the base 11;

[0071] The gear positioning device 12 is a bushing whose inner diameter matches the outer circle of the pinion journal of the middle double gear 1. The outer circle of the bushing is fixed to the base 11 through a positioning pin 1. The positioning pin 1 is set on the contact surface where the spur teeth of the middle double gear 1 overlap with the bushing, and the positioning pin 1 is located within the angle α formed by the intersection lines of the center of the middle double gear 1 and the spur teeth, helical teeth working surfaces and the pitch circle. By adjusting the height dimensions of the bushing of the gear positioning device 12 and the measuring rod mounting frame 131, it is ensured that the front end probe of the measuring lever measuring tool 132 and the specified axial section of the helical teeth of the middle double gear 1 are in the same plane.

[0072] like Figure 2The spring measuring rod device includes a measuring rod mounting frame 131, a measuring lever measuring tool 132, a second positioning pin 133, and a spring 134. The measuring rod mounting frame 131 is slotted, and one end of the measuring lever measuring tool 132 is mounted in the slot of the measuring rod mounting frame 131 through the second positioning pin 133. The measuring lever measuring tool 132 moves back and forth in the circumferential direction with the center of the second positioning pin 133 as the center of the circle, and the front end probe of the end of the measuring lever measuring tool 132 contacts the helical tooth surface of the middle double gear 1 placed on the gear positioning device 12, and the contact point coincides with the intersection of the ray drawn from the gear center on the axial section of the helical tooth of the middle double gear 1 and its working surface and the pitch circle. A spring 134 is provided in the middle of the measuring lever gauge 132 and is connected to the slotted wall surface. The spring force is applied to the rear end of the measuring lever gauge 132 in a direction parallel to the plane of the base 11. When no measurement is performed, the spring 134 should be in a slightly compressed state, and the rear end of the measuring lever gauge 132 moves clockwise along the circumferential direction. When measuring, a force is first applied to make the rear end of the measuring lever gauge 132 move counterclockwise along the circumferential direction, and the front end probe of the measuring lever gauge 132 moves away from the gear surface to be measured. The force is released to make the rear end of the measuring lever gauge 132 move clockwise along the circumferential direction, and the front end probe of the measuring lever gauge 132 moves close to the gear surface to be measured, and measurement can be achieved.

[0073] The other end of the measuring lever gauge 132 is provided with a measuring meter stand device 13, which includes a meter clamp, an adjustable screw, and a meter head 135. The meter head 135 is installed on the measuring rod mounting frame 131 through the meter clamp, and the meter head 135 passes through the hole of the meter clamp to contact the measuring lever gauge 132. The adjustable screw passes through the meter clamp to contact the meter head 135, and the position of the meter head 135 is adjusted as needed by tightening or loosening. The distance from the point where the meter head 135 acts on the measuring lever gauge 132 to the second positioning pin 133 is in a fixed proportion to the distance from the front end measuring point of the measuring lever gauge 132 to the second positioning pin 133.

[0074] Due to the dispersion of parts processing, a better solution is to manufacture a set of standard intermediate double gears 1 as standard parts, and ensure that the angular difference between the two working surfaces of the standard intermediate double gears 1 is an ideal value through more precise means such as three-coordinate measurement. Before measuring the subsequent intermediate double gears 1 to be measured, the standard intermediate double gears 1 are first placed on the group optional measuring device, and after obtaining the actual measured data, the table header 135 is reset to zero, and then the subsequent measurement of the parts to be measured is carried out based on the standard data.

[0075] Example 2

[0076] This embodiment provides an operation method based on the intermediate double gear grouping matching measurement device in Embodiment 1, and the steps include:

[0077] S1. Use a standard intermediate double gear 1 to install on the gear positioning device 12, the intermediate double gear 1 straight tooth working surface contacts the positioning pin, the intermediate double gear 1 helical tooth working surface contacts the front end probe of the measuring lever gauge 132, and the data measured by the header 135 is reset to zero;

[0078] S2. Then the measured intermediate double gear 1 is installed on the gear positioning device 12, the spur gear working surface of the intermediate double gear 1 contacts the positioning pin 1, and the helical gear working surface of the intermediate double gear 1 contacts the front end probe of the measuring lever measuring tool 132,

[0079] S3. Rotate the measured middle double gear 1, read the meter reading 135 at this time, and obtain the relative angular deviation of the spur and helical angular positioning teeth; measure the relative angular deviation of the spur and helical angular positioning teeth of the other middle double gear 1 in the same way;

[0080] S4. Calculate the mutual difference δ of the angular position between the two working surfaces with marked teeth of the measured intermediate double gear 1. If δ≤0.03mm, record the actual measured value of δ on the certificate of each intermediate double gear 1, compare them according to the tolerance range of the angular position difference, and quickly complete the grouping.

[0081] Example 3

[0082] This embodiment provides a device for measuring the axial correction value of an intermediate double gear. Figure 3 , including a base plate 21 and a bracket device 1 22, a bracket device 23, a helical gear positioning tooth 24, a spur gear positioning tooth 25, a table frame device 26 and a contact indication device installed on the base plate 21, wherein the bracket device 1 22 and the bracket device 2 23 are installed facing each other, and the helical gear positioning tooth 24 and the spur gear positioning tooth 25 are arranged between the bracket device 1 22 and the bracket device 2 23.

[0083] The base plate 21 is made of insulating material and is provided with a plurality of mounting holes, on which a guide rail groove is provided. The bracket device 1 22 and the bracket device 2 23 are provided with guide rail blocks that cooperate with the guide rail groove. The bracket device 1 22 and the bracket device 2 23 are movably connected through the guide rail blocks and the guide rail groove on the base plate 21, respectively, to achieve relative position adjustment of the bracket device 1 22 and the bracket device 2 23 to meet the measurement requirements of the intermediate double gears 1 with different axial sizes.

[0084] ,The support device 1 22 and the support device 2 23 are used to support the journals at both ends of the middle double gear 1. The inscribed circle diameter d1 formed by the V-shaped structure on the support device 1 22 is consistent with the journal size of the large tooth side of the middle double gear 1. The difference between the height of the inscribed circle diameter d1 center to the base 11 and the pitch circle radius of the helical gear positioning tooth 24 should be equal to the large tooth radius of the middle double gear 1; similarly, the inscribed circle diameter d2 formed by the V-shaped structure on the support device 2 23 is consistent with the journal gear on the small tooth side of the middle double gear 1. The difference between the height of the inscribed circle diameter d2 center to the base 11 and the pitch circle radius of the spur gear positioning tooth 25 should be equal to the small tooth radius of the middle double gear 1. The journals at both ends of the middle double gear 1 can be fixed by pressing with butterfly nuts, but the pressing force should not be too large. It is necessary to ensure that the middle double gear 1 can have a certain amount of movement along the axial direction of the measuring device during the measurement process. The spring 134 washer can be used at this nut pressing position to achieve this.

[0085] The contact indication device includes a power supply, an indicator light and a contactor, and an indicator light is provided on the connection line between the contactor and the power supply. Figure 4-5 The bracket device 1 22, the bracket device 23, the helical gear positioning tooth 24, and the spur gear positioning tooth 25 are divided into two completely isolated left and right parts, and the working surfaces of the bracket device 1 22, the bracket device 23, the helical gear positioning tooth 24, and the spur gear positioning tooth 25 of the left and right parts are respectively provided with a left contactor and a right contactor. The left contactor 1 on the bracket device 1 22 is connected to an electrode of the power supply through a line, and the right contactor 1 is connected to another electrode of the power supply through a line to form a first contact indication circuit loop; the left contactor 2 on the helical gear positioning tooth 24 is connected to an electrode of the power supply through a line, and the right contactor 2 is connected to another electrode of the power supply through a line to form a second contact indication circuit loop; the left contactor 3 of the spur gear positioning tooth 25 is connected to an electrode of the power supply through a line, and the right contactor 3 is connected to another electrode of the power supply through a line to form a third contact indication circuit loop; the left contactor 4 of the bracket device 23 is connected to an electrode of the power supply through a line, and the right contactor 4 is connected to another electrode of the power supply through a line to form a fourth contact indication circuit loop.

[0086] In actual operation, power is supplied to both ends of the contact indication circuit loop of bracket device 1 22, bracket device 2 23, helical gear positioning tooth 24, and spur gear positioning tooth 25, and the journals at both ends of the middle double gear 1 fit with the working surfaces of bracket device 1 22 and bracket device 2 23 respectively, the large teeth (helical teeth) of the middle double gear 1 fit with the working surfaces of the helical gear positioning tooth 24, and the small teeth (spur teeth) of the middle double gear 1 fit with the working surfaces of the spur gear positioning tooth 25. When the working surfaces fit together to form a passage, the indicator light will be on. If the large teeth (helical teeth) or small teeth (spur teeth) of the middle double gear 1 only fit with one working surface, the indicator light will not be on, and the middle double gear 1 needs to be reinstalled and the axial position readjusted. It is necessary to ensure that the indicator lights on the four-way contact indication device are all lit, otherwise the position of the middle double gear 1 needs to be readjusted.

[0087] The meter stand device 26 includes a meter stand sleeve and a measuring meter head 135 . The measuring meter head 135 is installed on the bottom plate 21 through the meter stand sleeve, and the measuring meter head 135 can measure the spur tooth surface of the middle double gear 1 .

[0088] Example 4

[0089] This embodiment provides a method for measuring the axial correction value of an intermediate double gear based on Embodiment 3, and the steps include:

[0090] S1. The journals at both ends of the intermediate double gear 1 are fixed to the bracket device 1 22 and the bracket device 2 23 by nuts, so that the spur gear surface and the helical gear surface of the intermediate double gear 1 are aligned with the spur gear positioning teeth 25 and the helical gear positioning teeth 24, respectively. The spring 134 washer is provided at the nut pressing position to ensure that the intermediate double gear 1 can have a certain amount of movement along the axial direction of the measuring device during the measurement process;

[0091] S2. Use the gear end face gear marked with number “Ⅰ” as the alignment tooth, adjust the axial position of the middle double gear 1, make the working surface of the alignment tooth contact with the working surface of the helical gear positioning tooth 24 and the spur gear positioning tooth 25 at the same time, and the indicator lights on the circuit loop formed by the helical gear positioning tooth 24, the spur gear positioning tooth 25 and the measured middle double gear 1 are all on. If the indicator lights are not on, reassemble, and record the reading value X1 of the axial displacement of the end face of the middle double gear 1 indicated by the measuring table;

[0092] S3. Keep the measuring table still, measure the middle double gears 1 marked with "Ⅱ" and "Ⅲ" in turn according to the above steps, record the readings X2 and X3 of the measuring table respectively, take the X1' value of the middle double gear 1 with number "Ⅰ" as the reference value, then the correction values ​​of the three middle double gears 1 are:

[0093] △1=0

[0094] △2=X2-X1

[0095] △3=X3-X1.

[0096] Example 5

[0097] This embodiment provides a method for selecting and matching intermediate double gears in groups, the steps comprising:

[0098] S1. Processing of large teeth of middle double gear 1;

[0099] Use a gear hobbing machine to complete the rough machining of the large external helical gear, then use external cylindrical grinding to machine the outer diameter of the helical gear, and then use a horizontal broaching machine to complete the large internal spline machining;

[0100] S2. Processing of small teeth of the middle double gear 1;

[0101] Use a gear shaping machine to complete the rough machining of small straight teeth, then use a worm gear grinding machine to complete the straight teeth finishing, and then use a gear shaping machine to complete the large gear external spline machining;

[0102] S3. Intermediate double gear 1 helical and spur combination;

[0103] S31. Match the large teeth of the intermediate double gear 1 and the small teeth of the intermediate double gear 1 according to the bilateral interference, and use the intermediate double gear 1 group matching measurement device to match the symmetry of the single piece in the same direction;

[0104] S32. Heat the matched large teeth and cool the small teeth in liquid nitrogen, align the tooth surfaces of the large and small teeth, quickly press fit and assemble, and keep the temperature to room temperature. After the parts are cooled, ensure that the end faces of the two pieces fit together without gaps;

[0105] S33. Use a vertical drilling machine to complete the processing of the inclined hole for the cylindrical pin for limiting the position, and complete the punching and riveting installation of the cylindrical pin according to the interference amount;

[0106] S34. Use a worm gear grinding machine to complete the finishing of large external helical teeth;

[0107] S4. Use the intermediate double gear 1 axial correction value measuring device to measure the axial correction value;

[0108] S5. Control the axial movement of the intermediate double gear 1.

[0109] S51. Figure 6 , install the journals at both ends of the middle double gear 1 on the front and rear bearing mounting seats 2, and use adjusting washers 1 and 2 to adjust the clearance, and then use bearing cover plates 3 to seal the bearing ends;

[0110] S52. The three intermediate double gears 1 are installed as a group, and the actual values ​​of the dimensions Ai of the three bearing mounts 2 on the casing assembly and the actual values ​​of the dimensions Ai of the bearing cover plate 3;

[0111] S53. Measure and record the three dimensions Bi when the axial clearance of the bearing is eliminated;

[0112] S54. Calculation of adjusting washers:

[0113] S541. Calculation of adjusting washer 2:

[0114] Taking the selection of a set of intermediate double gear 1 adjusting washer 2 as the reference group, that is, selecting an adjusting washer with a thickness of t1 from the full set of adjusting washer 1, the calculated thickness W1 of the adjusting washer 2 is:

[0115] The first group: W1 = A1-B1-a1-S1-Z

[0116] The second group: W2 = W1 + (a1-a2) + (B1-B2) - △2

[0117] The third group: W3 = W1 + (a1-a3) + (B1-B3) - △3

[0118] Where: S1 is the measured value of t1, Z is the required axial movement control value;

[0119] S542. Calculation of adjusting washer 1:

[0120] Calculate the thickness of the adjusting washer 1 of the other two gear sets:

[0121] S2=A2-B2-W2-a2-Z

[0122] S3=A3-B3-W3-a3-Z

[0123] S55. The adjusting washers selected from the complete set of adjusting washers one and two, if there is no adjusting washer with the corresponding calculated thickness in the complete set of adjusting washers, shall be ground to the calculated thickness.

[0124] S47.Optional

[0125] S471. The tolerance of the adjusting washer selected from the complete set of adjusting washer 1 and adjusting washer 2 is (0~-0.01)mm.

[0126] S472. If there is no adjusting washer with corresponding calculated thickness in the complete set of adjusting washers, it should be ground to the calculated thickness with a tolerance of (0~-0.01) mm.

[0127] S473. After grinding, adjust the washer, remove the sharp edges and clean it.

[0128] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An intermediate double gear axial correction value measuring device, characterized in that: It comprises a bottom plate and a bracket device 1, a bracket device 2, a helical gear positioning tooth, a spur gear positioning tooth, a table frame device and a contact indication device installed on the bottom plate, wherein the bracket device 1 and the bracket device 2 are installed facing each other, and the helical gear positioning tooth and the spur gear positioning tooth are arranged between the bracket device 1 and the bracket device 2, the helical gear positioning tooth is provided with a working surface that fits with the middle double gear helical tooth, and the spur gear positioning tooth is provided with a working surface that fits with the middle double gear spur tooth; The contact indication device comprises a power supply, an indicator light and a contactor. An indicator light is provided on the connection line between the contactor and the power supply. A left contactor and a right contactor are respectively provided on the working surfaces of the bracket device 1, the bracket device 2, the helical gear positioning teeth and the spur gear positioning teeth. The left contactor 1 on the bracket device 1 is connected to an electrode of the power supply through a line, and the right contactor 1 is connected to another electrode of the power supply through a line, so as to form a first contact indication circuit loop; the left contactor 2 on the helical gear positioning teeth is connected to an electrode of the power supply through a line, and the right contactor 2 is connected to another electrode of the power supply through a line, so as to form a second contact indication circuit loop; the left contactor 3 of the spur gear positioning teeth is connected to an electrode of the power supply through a line, and the right contactor 3 is connected to another electrode of the power supply through a line, so as to form a third contact indication circuit loop; the left contactor 4 of the bracket device 2 is connected to an electrode of the power supply through a line, and the right contactor 4 is connected to another electrode of the power supply through a line, so as to form a fourth contact indication circuit loop; The meter frame device comprises a meter frame sleeve and a measuring meter head. The measuring meter head is installed on the bottom plate through the meter frame sleeve, and the measuring meter head can measure the spur tooth surface of the middle double gear.

2. The device for measuring the axial correction value of the intermediate double gear according to claim 1, characterized in that: The bracket device 1, the bracket device 2, the helical gear positioning teeth, and the spur gear positioning teeth are all divided into two completely isolated parts, and the left contactor and the right contactor are respectively located in the two parts.

3. The device for measuring the axial correction value of the intermediate double gear according to claim 1, characterized in that: The bottom plate is provided with a guide rail groove, and the bracket device 1 and the bracket device 2 are provided with a guide rail block matched with the guide rail groove, and the bracket device 1 and the bracket device 2 are movably connected through the guide rail block and the guide rail groove on the bottom plate respectively.

4. A method for measuring the axial correction value of an intermediate double gear, characterized in that the steps include: S1. Fix the shaft journals at both ends of the middle double gear marked "Ⅰ" on the bracket device 1 and the bracket device 2 by pressing nuts, so that the spur tooth surface and the helical tooth surface of the middle double gear are aligned with the spur gear positioning teeth and the helical gear positioning teeth respectively; S2. Use the gear end face gear as the alignment gear, adjust the axial position of the middle double gear, make the working surface of the alignment gear contact with the working surface of the helical gear positioning gear and the spur gear positioning gear at the same time, and the indicator lights on the circuit loop formed by the helical gear positioning gear, the spur gear positioning gear and the measured middle double gear are all on, and record the reading value X1 of the axial displacement of the middle double gear end face indicated by the measuring table; S3. Measure the middle double gears marked with "Ⅱ" and "Ⅲ" in turn according to the above steps, and record the readings X2 and X3 of the measuring table respectively. Take the X1' value of the middle double gear "Ⅰ" as the reference value, and the correction values ​​of the three middle double gears are: △1＝0 △2=X2-X1 △3=X3-X1.

5. A method for selecting and matching intermediate double gears in groups, characterized in that the steps include: S1. Processing of large teeth of middle double gears; Use a gear hobbing machine to complete the rough machining of the large external helical gear, then use external cylindrical grinding to machine the outer diameter of the helical gear, and then use a horizontal broaching machine to complete the large internal spline machining; S2. Processing of small teeth of middle double gear; Use a gear shaping machine to complete the rough machining of small straight teeth, then use a worm gear grinding machine to complete the straight teeth finishing, and then use a gear shaping machine to complete the large gear external spline machining; S3. Intermediate double gear helical and spur combination; S31. Match the large teeth of the intermediate double gear and the small teeth of the intermediate double gear according to the bilateral interference, use the intermediate double gear group matching measurement device to measure the relative angular deviation of the spur gear and the helical gear angular positioning teeth, and match the single piece symmetry in the same direction; S32. Heat the matched large teeth and cool the small teeth in liquid nitrogen, align the tooth surfaces of the large and small teeth, quickly press fit and assemble, and keep the temperature to room temperature. After the parts are cooled, ensure that the end faces of the two pieces fit together without gaps; S33. Use a vertical drilling machine to complete the processing of the inclined hole for the cylindrical pin for limiting the position, and complete the punching and riveting installation of the cylindrical pin according to the interference amount; S34. Use a worm gear grinding machine to complete the finishing of large external helical teeth; S4. Use the intermediate double gear axial correction value measuring device to measure the axial correction value; S5. Control the axial movement of the intermediate double gears.

6. The method for selecting and matching intermediate double gears in groups according to claim 5, characterized in that: The intermediate double gear group matching measuring device comprises a base and a gear positioning device, a spring measuring rod device and a measuring table stand device installed on the base; The gear positioning device comprises a bushing whose inner diameter matches the journal of the middle double gear, and a positioning pin one on the bushing is connected to the base; The spring measuring rod device comprises a measuring rod mounting frame, a lever measuring tool, a positioning pin and a spring. The measuring rod mounting frame is slotted, one end of the lever measuring tool is mounted in the slot of the measuring rod mounting frame through the positioning pin, and the front end probe of the end of the lever measuring tool contacts the helical tooth surface of the middle double gear placed on the gear positioning device, and the lever measuring tool moves back and forth in the circumferential direction with the center of the positioning pin as the center of the circle, a spring is provided in the middle of the lever measuring tool to connect with the slotted wall, and a measuring table frame device is provided at the other end of the lever measuring tool; The measuring meter frame device comprises a meter clamp, an adjustable screw and a meter head. The meter head is installed on the measuring rod mounting frame through the meter clamp and the meter head contacts the lever measuring tool. The adjustable screw passes through the meter clamp and contacts the meter head.

7. The method for selecting and matching intermediate double gears in groups according to claim 6, characterized in that: The locating pin is arranged on the contact surface where the spur teeth of the middle double gear overlap with the bushing, and the locating pin is located within the angle α formed by the intersection lines of the center of the middle double gear and the spur teeth, helical teeth working surfaces and pitch circles.

8. The method for selecting and matching intermediate double gears in groups according to claim 6, characterized in that: The intermediate double gear groupability selection and measurement steps include: S311. The measured intermediate double gear is installed on the gear positioning device, the spur gear working surface of the intermediate double gear contacts the positioning pin, and the helical gear working surface of the intermediate double gear contacts the front end probe of the lever measuring tool; S312. Rotate the measured middle double gear, read the meter reading, and obtain the relative angular deviation of the spur and helical angular positioning teeth; S313. Measure the relative angular deviation of the spur and helical angular positioning teeth of the other intermediate double gears in the same manner; S316. Calculate the mutual difference δ of the angular position between the two working surfaces of the measured intermediate double gear with marked teeth, and quickly group them according to the tolerance range.

9. The method for selecting and matching intermediate double gears in groups according to claim 6, characterized in that: In the double gear group matching, the standard middle double gear is used as the standard data to reset the header measurement to zero.

10. The method for selecting and matching intermediate double gears in groups according to claim 5, characterized in that: The movement control step comprises: S51. Install the journals at both ends of the middle double gear on the front and rear bearing mounting seats, and use adjusting washers 1 and 2 to adjust the clearance, and then use bearing cover plates to seal the bearing ends; S52. The three intermediate double gears are installed as a group, and the actual values ​​of the dimensions Ai of the three bearing mounting seats on the casing assembly and the actual values ​​of the dimensions Ai of the bearing cover plate 3 are respectively; S53. Measure and record the three dimensions Bi when the axial clearance of the bearing is eliminated; S54. Calculation of adjusting washers: S54. Calculation of adjusting washer 2: Taking the selection of a set of middle double gear adjusting washers 2 as the reference group, that is, selecting adjusting washers with a thickness of t1 from the full set of adjusting washers 1, the calculated thickness W1 of the adjusting washers 2 of the first group is: W1=A1-B1-a1-S1-Z Where: S1 is the measured value of t1, Z is the required axial movement control value; The second group: W2 = W1 + (a1-a2) + (B1-B2) - △2 The third group: W3 = W1 + (a1-a3) + (B1-B3) - △3 Calculation of adjusting washer 1: Calculate the thickness of the adjusting washer 1 of the other two gear sets: S2=A2-B2-W2-a2-Z S3=A3-B3-W3-a3-Z S55. The adjusting washers selected from the complete set of adjusting washers one and two, if there is no adjusting washer with the corresponding calculated thickness in the complete set of adjusting washers, shall be ground to the calculated thickness.

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