A method for detecting radial runout of large gear ring of gear ring type turntable

Abstract

The present application relates to the technical field of detecting radial runout of a large gear ring of a turntable, and in particular to a method for detecting radial runout of a large gear ring of a gear ring type turntable, which includes selecting a jig and measuring the radial runout of the large gear ring installed on a workbench, which can be obtained by measuring the coaxiality of the large gear ring and the workbench. First, the first bearing is installed on the jig for self-inspection, and the coaxiality of the jig and the first bearing is measured to see if it is within a specified range. Then, the jig is installed on the workbench, and the coaxiality of the jig and the workbench is measured to see if it is within a specified range. Then, the large gear ring is installed on the workbench, and the coaxiality of the large gear ring workbench is measured to see if it is within a specified range. Finally, the workbench with the large gear ring installed is installed on the turntable base, and the coaxiality of the workbench and the turntable base is measured to see if it is within a specified range. The present application uses a jig with accuracy that meets the requirements for measurement to ensure the accuracy of the radial runout of the measured large gear ring after installation, thereby improving the overall accuracy of the gear ring type turntable.

Description

Technical Field

[0001] The present application relates to the technical field of radial runout detection of a turntable large gear ring, and in particular to a method for detecting radial runout of a large gear ring of a gear ring type turntable. Background Art

[0002] The ring gear turntable is a mechanical transmission structure that can be used with worktables, cutters and other components to achieve various types of processing tasks and is widely used in the machine tool industry.

[0003] The gear ring type turntable includes a turntable base and a small gear ring, a large gear ring and a workbench arranged on the turntable base. The small gear ring is connected to the drive device and meshes with the large gear ring, thereby driving the large gear ring to rotate. The large gear ring is installed on the workbench, and the rotation of the large gear ring drives the workbench to rotate. Radial runout refers to the change in the radial position of the large gear ring relative to the center line of the gear during the rotation process. If the radial runout of the large gear ring is large, the deviation of the workbench during the rotation process will also become larger, thereby affecting the positioning accuracy of the workpiece on the workbench.

[0004] In order to ensure the rotation accuracy of the workbench, it is necessary to test the radial runout of the large gear ring after installation to ensure that the radial runout of the large gear ring after installation is within the range of 0.02mm. The existing detection method usually uses a positioning core shaft to rotate the positioning core shaft and connect it to the workbench. The base of the micrometer is adsorbed on the surface of the positioning core shaft, and the positioning core shaft is rotated. The needle of the micrometer contacts the side wall of the inner circle of the large gear ring. The radial runout of the large gear ring after installation is measured according to the readings obtained by the micrometer along one circle of the inner circle of the large gear ring. Using this measurement method, when the positioning core shaft rotates, the coaxiality of the rotation axis of the positioning core shaft and the axis of the large gear ring and the workbench cannot be guaranteed, and the measured radial runout of the large gear ring is not accurate enough.

[0005] Therefore, a method for detecting the radial runout of the large gear ring of a gear ring turntable is needed to ensure accurate measurement of the radial runout of the large gear ring after installation, improve the accuracy of detection, and thus ensure the overall accuracy of the gear ring turntable and improve the processing accuracy of the machine tool. Summary of the Invention

[0006] In order to improve the accuracy of detecting the radial runout of the large gear ring after installation, the present application provides a method for detecting the radial runout of the large gear ring of a gear ring type turntable.

[0007] This application provides a method for detecting radial runout of a large gear ring of a gear ring type turntable, which adopts the following technical solution:

[0008] A method for detecting radial runout of a large gear ring of a gear ring type turntable, comprising the following steps: S1: the detection method comprises selecting a jig, wherein the selected jig is provided with an annular measuring surface for measurement by a dial indicator, the annular measuring surface being an inner annular surface on the jig, and the centerline of the annular measuring surface coincides with the centerline of the jig; S2: mutual inspection of the coaxiality of a first bearing and the jig is performed, a dial indicator is installed on the top surface of the first inner ring of the first bearing, the dial indicator is used to judge and adjust the coaxiality of the first bearing and the jig to be within 1 / 4 of the specified range value of radial runout after the large gear ring is installed, the first outer ring of the first bearing is locked with the jig after mutual inspection, and the dial indicator is removed; S3: the coaxiality of the workbench, the jig, and the first bearing is inspected, and the dial indicator is again installed on the top surface of the first inner ring of the first bearing , use a dial indicator to judge and adjust the coaxiality of the workbench, fixture, and first bearing to be within 1 / 2 of the specified range of radial runout after the large gear ring is installed. After the coaxiality test is completed, lock the fixture and the workbench; S4: Check the coaxiality of the large gear ring and the workbench, install the dial indicator on the top surface of the first inner ring of the first bearing again, use the dial indicator to judge and adjust the coaxiality of the large gear ring and the workbench to be within the specified range of radial runout after the large gear ring is installed. After the coaxiality test is completed, lock the large gear ring and the workbench, remove the fixture, first bearing, and dial indicator; S5: Correct the coaxiality of the workbench and the turntable base, fix the dial indicator on the turntable base, use the dial indicator to judge and adjust the coaxiality of the workbench and the turntable base to be within the specified range of radial runout after the large gear ring is installed.

[0009] By adopting the above technical solution, the radial runout of the large gear ring after being installed on the workbench is measured, that is, the coaxiality of the large gear ring and the workbench. First, a jig with qualified precision is used to check the first bearing to ensure that the coaxiality of the jig and the first bearing is within the specified range of the radial runout after the large gear ring is installed. If the precision of the jig does not meet the standard, the jig can be repaired and reinstalled with the first bearing. Then, the coaxiality of the jig and the workbench, the large gear ring, and the turntable base is measured to ensure the accuracy of the coaxiality of the large gear ring and the workbench, thereby ensuring the accuracy of the radial runout of the large gear ring after installation, thereby improving the overall precision of the gear ring turntable.

[0010] In S3, an inner hole is provided on the workbench, and a jig is set on the inner hole. A through hole is provided on the jig and the through hole is connected to the inner hole of the workbench. After the dial indicator is fixed, the needle of the dial indicator points to and touches the side wall of the inner hole of the workbench. The first bearing rotates at least one circle and the dial indicator rotates synchronously therewith. The value of the dial indicator is read. The value is used to determine whether the coaxiality of the workbench, the jig, and the first bearing is within 1 / 2 of the specified range of radial runout after the large gear ring is installed. If it is not within 1 / 2 of the specified range of radial runout after the large gear ring is installed, adjust the horizontal position of the jig according to The above steps are measured again until the coaxiality of the workbench, jig and first bearing is within the specified range of radial runout after the large gear ring is installed. The coaxiality inspection of the workbench, jig and first bearing is completed. An adapter plate is fixed on the first inner ring of the first bearing to facilitate the rotation of the first bearing. A raised protrusion is protruding on the adapter plate. Before setting the jig on the workbench, first fix the adapter plate on the jig, then set the jig on the workbench, and then fix the dial indicator on the top surface of the raised protrusion. After the coaxiality measurement of the workbench, jig and first bearing is completed, remove the dial indicator.

[0011] By adopting the above technical solution, the micrometer is fixed on the raised protrusion, which increases the height of the micrometer, facilitates the adjustment of the position of the needle of the micrometer, and further facilitates the needle of the micrometer to smoothly touch the inner hole side wall of the workbench. Rotating the adapter plate can drive the first bearing to rotate, making the rotation of the first bearing more convenient.

[0012] Optionally, in S4, the large gear ring is placed on a workbench. After the dial indicator is fixed, the needle of the dial indicator points to and touches the inner circumferential side wall of the large gear ring. The first bearing rotates at least one circle and the dial indicator rotates synchronously therewith. The value of the dial indicator is read to determine whether the coaxiality of the large gear ring and the workbench is within the specified range of radial runout after the large gear ring is installed. If it is not within the specified range of radial runout after the large gear ring is installed, adjust the horizontal position of the large gear ring and measure again according to the above steps. Until the coaxiality of the large gear ring and the workbench is within the specified range of radial runout after the large gear ring is installed, the coaxiality inspection of the large gear ring and the workbench is completed. An extension piece is fixedly installed on the raised protrusion to facilitate the needle of the micrometer to approach the inner circle of the large gear ring. The extension piece is provided with a groove for the micrometer to slide radially along the first bearing. After the large gear ring is set on the workbench, the micrometer is fixed in the groove of the extension piece. After the coaxiality measurement of the large gear ring and the workbench is completed, the micrometer, extension piece and adapter plate are removed.

[0013] By adopting the above technical solution and setting the extension piece, the base of the dial indicator can slide radially along the first bearing with the help of the extension piece, thereby facilitating the needle of the dial indicator to smoothly touch the inner side wall of the large gear ring.

[0014] Optionally, in S5, the workbench is installed on the turntable base, with the side of the workbench with the large gear ring installed facing the turntable base. After the micrometer is fixed, the needle of the micrometer points to and touches the side wall of the inner hole of the workbench. The workbench rotates at least one circle and the micrometer rotates synchronously therewith. The micrometer reading is read, and the numerical value is used to determine whether the coaxiality of the workbench and the turntable base is within the specified range of radial runout after the large gear ring is installed. If it is not within the specified range of radial runout after the large gear ring is installed, adjust the horizontal position of the workbench, and measure again according to the above steps until the coaxiality of the workbench and the turntable base is within the specified range of radial runout after the large gear ring is installed. The coaxiality of the workbench and the turntable base is completed. After the workbench is installed on the turntable base, an auxiliary bracket is fixed on the turntable base, and the micrometer is fixed on the auxiliary bracket. After the coaxiality measurement of the workbench and the turntable base is completed, the auxiliary bracket is removed.

[0015] By adopting the above technical solution, the micrometer is fixed on the auxiliary bracket on the turntable base, which makes it easy for the needle of the micrometer to touch the inner hole side wall of the workbench, and avoids the measuring stroke of the micrometer being too small, which affects the needle of the micrometer to touch the inner hole side wall of the workbench.

[0016] Optionally, in S3, after the jig is set on the workbench, the locking force between the jig and the workbench is gradually increased, and the coaxiality of the workbench, the jig, and the first bearing is measured multiple times under different locking forces until the measurement is stopped after it is fully locked.

[0017] By adopting the above technical solution, the influence of different locking forces on the coaxiality measurement of the fixture and the workbench is avoided, and the accuracy of the coaxiality measurement of the fixture and the workbench is improved.

[0018] Optionally, in S3, the jig and the workbench are fixed by threaded locking, and the bolts are pre-tightened to the jig and the workbench according to torques from small to large. In the process of gradually increasing the torque, the coaxiality of the workbench and the jig is measured multiple times until the torque reaches 100%. The measurement value on the micrometer is read at each measurement according to the steps of S3, and the measurement value is kept within 1 / 2 of the specified range of radial runout after the large gear ring is installed.

[0019] By adopting the above technical solution, with the help of the threaded locking fixture and the workbench, it is convenient to gradually adjust the locking force of the fixture and the workbench, and measure the head circumference of the fixture and the workbench multiple times under different torques of the bolts, thereby avoiding the influence of different locking forces on the coaxiality measurement of the workbench, the fixture and the first bearing, and improving the accuracy of the measurement results.

[0020] Optionally, in S4, after the large ring gear is set on the workbench, the locking force between the large ring gear and the workbench is gradually increased. In the process of gradually increasing the locking force, the coaxiality of the large ring gear and the workbench is measured multiple times according to the steps in S4 under different locking forces until the measurement is stopped after it is fully locked.

[0021] By adopting the above technical solution, the influence of different locking forces on the coaxiality measurement of the large gear ring and the workbench is avoided, and the accuracy of the coaxiality measurement of the large gear ring and the workbench is improved.

[0022] Optionally, in S4, the large gear ring and the workbench are fixed by threaded locking, and the bolts are pre-tightened with the large gear ring and the workbench according to the torque from small to large. In the process of gradually increasing the torque, the coaxiality of the large gear ring and the workbench is measured multiple times until the torque reaches 100%. The value of the micrometer is read at each measurement according to the steps of S4, and the measured values ​​are all within the specified range of radial runout after the large gear ring is installed.

[0023] By adopting the above technical solution, the large gear ring and the workbench are locked with the help of threads, which makes it easy to gradually adjust the locking force of the large gear ring and the workbench. Multiple measurements are taken during the process of different bolt torques to avoid the locking force affecting the measurement of the coaxiality of the large gear ring and the workbench, thereby improving the accuracy of the measurement results.

[0024] Optionally, when measuring the coaxiality between the workbench and the fixture, the coaxiality of the workbench and the fixture is measured under the conditions that the torque of the bolt is selected as 40%, 70%, and 100% respectively; when measuring the coaxiality between the workbench and the large gear ring, the coaxiality of the workbench and the large gear ring is measured under the conditions that the torque of the bolt is selected as 40%, 70%, and 100% respectively.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. First, use a jig that meets the precision standards to check the first bearing to ensure that the coaxiality of the jig and the first bearing is within the specified range of radial runout after the large ring gear is installed. Then measure the coaxiality of the jig and the workbench, as well as the large ring gear and the turntable base to ensure the accuracy of the measured coaxiality of the large ring gear and the workbench. Then, accurately obtain the radial runout accuracy of the large ring gear after installation, thereby improving the overall installation accuracy of the ring gear turntable.

[0027] 2. Fixing the dial indicator on the raised protrusion increases the height of the dial indicator, making it easier to adjust the position of the dial indicator needle, thereby facilitating the dial indicator needle to smoothly touch the inner hole side wall of the workbench. Rotating the adapter plate can drive the first bearing to rotate, making the rotation of the first bearing more convenient;

[0028] 3. The provision of the extension piece facilitates the radial sliding of the base of the dial indicator along the first bearing with the aid of the extension piece, thereby facilitating the needle of the dial indicator to smoothly touch the inner circumferential side wall of the large gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the fixture in the embodiment of the present application;

[0030] Figure 2 A cross-sectional view of the first bearing, the jig, and the dial indicator in an embodiment of the present application;

[0031] Figure 3 This is a cross-sectional view of the adapter plate installed on the first bearing in an embodiment of the present application;

[0032] Figure 4 A partial cross-sectional view of the adapter plate, the first bearing, the fixture, the workbench, and the dial indicator in the embodiment of the present application;

[0033] Figure 5 A partial cross-sectional view of the extension member, adapter plate, first bearing, fixture, workbench, large gear ring, and micrometer in an embodiment of the present application;

[0034] Figure 6 This is an exploded schematic diagram of the extension member, the adapter plate, the first bearing, the fixture, the large ring gear, and the workbench in the embodiment of the present application;

[0035] Figure 7 This is an exploded schematic diagram of the workbench, large gear ring, and turntable base in the embodiment of the present application;

[0036] Figure 8 This is a structural diagram of the workbench, large gear ring, turntable base, dial indicator, and auxiliary bracket in the embodiment of the present application;

[0037] Figure 9 This is a cross-sectional view of the workbench, large gear ring, turntable base, micrometer, and auxiliary bracket in the embodiment of this application.

[0038] Figure numerals: 1, fixture; 2, annular measuring surface; 3, dial indicator; 4, large gear ring; 5, workbench; 6, first bearing; 7, through hole; 8, step surface; 9, first outer ring; 10, first inner ring; 11, first threaded hole; 12, second threaded hole; 13, first bolt; 14, adapter plate; 15, third threaded hole; 16, circular hole; 17, fourth threaded hole; 18, second bolt; 19, inner hole; 20, limiting ring; 21, third bolt; 22, padding protrusion; 23, workbench measuring surface; 24, fifth threaded hole ; 25. Sixth threaded hole; 26. Fourth bolt; 27. Extension piece; 28. Seventh threaded hole; 29. ​​Eighth threaded hole; 30. Fifth bolt; 31. Slide groove; 32. Measuring surface of large gear ring; 33. Ninth threaded hole; 34. Tenth threaded hole; 35. Sixth bolt; 36. Turntable base; 37. Auxiliary bracket; 38. Adapter sleeve; 39. Second bearing; 40. Second inner ring; 41. Second outer ring; 42. Small gear ring; 43. Motor; 44. Eleventh threaded hole; 45. Twelfth threaded hole; 46. Seventh bolt. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-9 This application is described in further detail.

[0040] Example:

[0041] A method for detecting radial runout of the large gear ring of a gear ring type turntable, referring to Figure 1 In S1, the detection method includes a jig 1, which is annular in shape and is provided with an annular measuring surface 2 for the needle of the micrometer 3 to point to and touch. The annular measuring surface 2 is an inner annular surface on the jig 1, and the center line of the annular measuring surface 2 coincides with the center line of the jig 1.

[0042] refer to Figure 1 and Figure 2In S2, the center of the fixture 1 has a through hole 7, and the through hole 7 is provided with a step surface 8. The first bearing 6 is placed on the through hole 7. The bottom surface of the first outer ring 9 of the first bearing 6 conflicts with the step surface 8. The base of the micrometer 3 is magnetically attracted to the top surface of the first inner ring 10 of the first bearing 6. The micrometer 3 is adjusted so that the needle points to and touches the annular measuring surface 2 of the fixture 1. The first bearing 6 rotates at least one circle and the micrometer 3 rotates synchronously therewith. The reading of the micrometer 3 is read. If the reading is within 0.005mm, the coaxiality of the first bearing 6 and the fixture 1 meets the requirements. If the reading is not within 0.005mm, the fixture 1 is repaired and reinstalled with the first bearing 6, and the above steps are repeated again. After measurement, the reading of the micrometer 3 is controlled within 0.005mm, that is, the coaxiality of the first bearing 6 and the fixture 1 is within 1 / 4 of the specified range of radial runout after the large gear ring 4 is installed. At this time, the first bearing 6 and the fixture 1 are locked. The first outer ring 9 of the first bearing 6 is provided with a first threaded hole 11, and the step surface 8 of the fixture 1 is provided with a second threaded hole 12. The size and shape of the first threaded hole 11 and the second threaded hole 12 are adapted and the positions correspond. A first bolt 13 is provided in the first threaded hole 11, and the first bolt 13 passes through the first outer ring 9 of the first bearing 6 and is threadedly connected to the second threaded hole 12 to achieve locking and fixation of the fixture 1 and the first bearing 6. Remove the micrometer 3 and proceed to the next step.

[0043] refer to Figure 3 and Figure 4 Before S3, the adapter plate 14 is first fixed to the first bearing 6. A third threaded hole 15 is opened on the adapter plate 14, a round hole 16 is opened on the first inner ring 10 of the first bearing 6, and a fourth threaded hole 17 is opened on the fixture 1. The sizes and shapes of the third threaded hole 15, the round hole 16, and the fourth threaded hole 17 are adapted and correspond in position. A second bolt 18 is provided in the fourth threaded hole 17. The bolt head of the second bolt 18 is located at the bottom of the fixture 1. The second bolt 18 passes through the fixture 1 and the first bearing 6 and is threadedly connected with the fourth threaded hole 17 to achieve a fixed connection between the adapter plate 14, the first bearing 6, and the fixture 1. The length of the second bolt 18 is less than that of the third bolt The sum of the depths of the grooved holes 15, the circular holes 16, and the fourth threaded holes 17, an inner hole 19 is opened on the workbench 5, and the bottom of the jig 1 protrudes to form a limit ring 20. The jig 1 with the first bearing 6 is fixed on the inner hole 19, and the through hole 7 of the jig 1 is connected to the inner hole 19 of the workbench 5. The bottom surface of the jig 1 conflicts with the workbench 5, and the limit ring 20 extends into the inner hole 19 of the workbench 5. The length of the limit ring 20 along the axial direction of the first bearing 6 is less than the hole depth of the inner hole 19 of the workbench 5. The third threaded hole 15 is internally threaded with a third bolt 21, and the third bolt 21 protrudes from the surface of the adapter plate 14. Rotating the third bolt 21 can drive the first bearing 6 to rotate.

[0044] refer to Figure 3 and Figure 4, the surface of the adapter plate 14 is protruding with multiple raised protrusions 22, and the base of the dial indicator 3 is magnetically attracted to the top surface of the raised protrusion 22. The side wall of the inner hole 19 of the workbench 5 is the workbench measuring surface 23. The dial indicator 3 is adjusted so that the needle points to and touches the workbench measuring surface 23. The fixture 1 is threadedly connected to the workbench 5. A fifth threaded hole 24 is provided on the fixture 1, and a sixth threaded hole 25 is provided on the workbench 5. A fourth bolt 26 is provided in the fifth threaded hole 24. The fourth bolt 26 passes through the fixture 1 and is threadedly connected to the sixth threaded hole 25 to achieve locking and fixing of the fixture 1 and the workbench 5. During the measurement process, the torque of the fourth bolt 26 is first locked and fixed to the fixture 1 and the workbench 5 according to 40%, and the first bearing 6 is driven to rotate at least one circle by turning the third bolt 21, and the dial indicator 3 is synchronized therewith. Turn and read the reading of the micrometer 3. If the reading is within 0.01mm, the coaxiality of the first bearing 6, the fixture 1, and the workbench 5 is within the specified range. If the reading is not within 0.01mm, adjust the horizontal position of the fixture 1 and measure again. The reading is controlled within 0.01mm. Then tighten the fixture 1 and the workbench 5 with a torque of 70%, and measure again according to the above steps. The reading of the micrometer 3 is within 0.01mm. Then tighten the fixture 1 and the workbench 5 with a torque of 100%, and measure again according to the above steps. The reading of the micrometer 3 is within 0.01mm, that is, the coaxiality of the workbench 5, the fixture 1, and the first bearing 6 is within 1 / 2 of the specified range value of the radial runout after the large gear ring 4 is installed. Remove the micrometer 3 and proceed to the next step.

[0045] refer to Figure 5 and Figure 6In S4, the large gear ring 4 is first installed on the workbench 5. The raised protrusion 22 is fixedly connected with an extension piece 27 that facilitates the needle of the dial indicator 3 to approach the inner circle of the large gear ring 4. A seventh threaded hole 28 is opened on the raised protrusion 22, and an eighth threaded hole 29 is opened on the extended piece 27. A fifth bolt 30 is set in the eighth threaded hole 29. The fifth bolt 30 passes through the extended piece 27 and is threadedly connected with the seventh threaded hole 28 to achieve the locking and fixation of the extended piece 27 and the raised protrusion 22. A slide groove 31 is opened on the extended piece 27. The slide groove 31 is along the first bearing 6. The dial gauge 3 is arranged radially, and the base of the dial gauge 3 is magnetically attracted in the slide groove 31 and the position of the dial gauge 3 along the radial direction of the first bearing 6 can be adjusted, so that the dial gauge 3 can measure the coaxiality of the large gear ring 4 and the workbench 5. The inner circle side wall of the large gear ring 4 is the large gear ring measuring surface 32. The dial gauge 3 is adjusted so that the needle points to and touches the large gear ring measuring surface 32. The large gear ring 4 is threadedly connected to the workbench 5. A ninth threaded hole 33 is provided on the large gear ring 4, and a tenth threaded hole 34 is provided on the workbench 5. A sixth bolt 35 is provided in the ninth threaded hole 33. The sixth bolt 35 passes through the large gear ring 4 and is screwed to the workbench 5. The tenth threaded hole 34 is threadedly connected to realize the locking and fixing of the large gear ring 4 and the workbench 5. During the measurement process, the torque of the sixth bolt 35 is first locked and fixed to the large gear ring 4 and the workbench 5 according to 40%. The first bearing 6 is driven to rotate at least one circle by rotating the third bolt 21, and the dial indicator 3 rotates synchronously therewith. The reading of the dial indicator 3 is read. If the reading is within 0.02mm, the coaxiality of the large gear ring 4 and the workbench 5 is within the specified range. If the reading is not within 0.02mm, adjust the horizontal position of the large gear ring 4 and measure again. The reading is controlled The torque of the sixth bolt 35 is tightened to 70% to fix the large gear ring 4 and the workbench 5, and the measurement is made again according to the above steps. The reading of the micrometer 3 is within 0.02mm; the torque of the sixth bolt 35 is tightened to 100% to fix the large gear ring 4 and the workbench 5, and the measurement is made again according to the above steps. The reading of the micrometer 3 is within 0.02mm, and the coaxiality of the workbench 5 and the large gear ring 4 is within the specified range. Then remove the fixture 1, the first bearing 6, the micrometer 3, the extension piece 27, and the adapter plate 14 to proceed to the next step.

[0046] refer to Figure 8 and Figure 9In S5, a second bearing 39 is mounted on the turntable base 36. The second outer ring 41 of the second bearing 39 is threadedly locked on the turntable base 36. The second bearing 39 is used to support the rotation of the workbench 5. The second inner ring 40 of the second bearing 39 is threadedly locked with the adapter sleeve 38. The second inner ring 40 is provided with a long hole. The adapter sleeve 38 is provided with a bolt passing through the long hole. One end of the bolt passes through the second inner ring 40 and is threadedly connected to a nut that locks the second inner ring 40 and the adapter sleeve 38 ( (not shown in the figure), the workbench 5 is provided with an eleventh threaded hole 44, the adapter sleeve 38 is provided with a twelfth threaded hole 45, and the eleventh threaded hole 44 is provided with a seventh bolt 46. The workbench 5 with the large gear ring 4 installed is installed on the turntable base 36, and the side of the workbench 5 with the large gear ring 4 is facing the turntable base 36. The adapter sleeve 38 conflicts with the side of the workbench 5 with the large gear ring 4. The seventh bolt 46 passes through the workbench and is threadedly locked with the twelfth threaded hole 45, and then combined. Figure 7 The turntable base 36 is equipped with a driving source and a small gear ring 42 that meshes with the large gear ring 4. In this embodiment, the driving source is a motor 43. The output shaft of the motor 43 is fixed to the small gear ring 42. When the motor 43 works, the small gear ring 42 rotates, and the small gear ring 42 drives the large gear ring 4 and the workbench 5 to rotate. An auxiliary bracket 37 is welded to the turntable base 36. The base of the dial gauge 3 is magnetically attracted to the auxiliary bracket 37. The pointer of the dial gauge 3 points to and touches the measuring surface 23 of the workbench. The workbench 5 rotates at least one circle and the dial gauge 3 rotates synchronously with it. The reading of the dial gauge 3 is read. If the reading is controlled at 0. 0.02mm, that is, the coaxiality of the workbench 5 and the turntable base 36 is within the specified range of the radial runout of the large ring gear 4 after installation. If it is not within the specified range of the radial runout of the large ring gear 4 after installation, adjust the horizontal position of the workbench 5 and measure again to control the reading within 0.02mm. The coaxiality of the workbench 5 and the turntable base 36 is within the specified range of the radial runout of the large ring gear 4 after installation. At this time, the workbench 5 and the adapter sleeve 38 are threadedly locked to complete the assembly of the ring gear turntable, ensuring the accuracy of the radial runout of the large ring gear 4 after installation and improving the overall accuracy of the ring gear turntable.

[0047] The implementation principle of the embodiment of the present application is as follows: the coaxiality of the large gear ring 4 and the workbench 5 is measured to obtain the radial runout of the large gear ring 4 after installation. First, the first bearing 6 is installed on the jig 1 for self-inspection. If the reading of the micrometer 3 is controlled within 0.005mm, the coaxiality of the jig 1 and the first bearing 6 meets the requirements. The first bearing 6 is threadedly locked on the jig 1 and the micrometer 3 is removed. Then, the jig 1 is installed on the workbench 5, the adapter plate 14 is threadedly locked on the first bearing 6, and the coaxiality of the jig 1 and the workbench 5 is measured. If the reading of the micrometer 3 is controlled within 0.01mm, the coaxiality of the jig 1, the first bearing 6 and the workbench 5 meets the requirements. The jig 1 is threadedly locked on the workbench 5 and the micrometer 3 is removed. Then, the large gear ring 4 is installed on the workbench 5. Thread the extension piece 27 onto the raised protrusion 22 of the adapter plate 14, measure the coaxiality of the large ring gear 4 and the worktable 5, and control the reading of the micrometer 3 within 0.02 mm. The coaxiality of the first bearing 6, the fixture 1, the large ring gear 4, and the worktable 5 meets the requirements. Thread the large ring gear 4 and the worktable 5, remove the first bearing 6, the fixture 1, the micrometer 3, the adapter plate 14, and the extension piece 27. Finally, install the worktable 5 with the large ring gear 4 on the turntable base 36, weld the auxiliary bracket 37 to the turntable base 36, measure the coaxiality of the worktable 5 and the turntable base 36, and control the reading of the micrometer 3 within 0.02 mm. The coaxiality of the worktable 5 and the turntable base 36 meets the requirements, thereby ensuring the accuracy of the radial runout of the large ring gear 4 after installation.

Claims

1. A method for detecting radial runout of a large gear ring of a gear ring type turntable, characterized in that: The following steps are involved: S1: The detection method comprises selecting a jig (1), wherein the selected jig (1) is provided with an annular measuring surface (2) for measurement by a dial indicator (3), the annular measuring surface (2) being an inner annular surface on the jig (1), and the center line of the annular measuring surface (2) coincides with the center line of the jig (1); S2: The coaxiality of the first bearing (6) and the jig (1) is mutually checked, a micrometer (3) is installed on the top surface of the first inner ring (10) of the first bearing (6), and the micrometer (3) is used to judge and adjust the coaxiality of the first bearing (6) and the jig (1) to be within 1 / 4 of the specified range of radial runout after the large gear ring (4) is installed. After the mutual check, the first outer ring (9) of the first bearing (6) and the jig (1) are locked, and the micrometer (3) is removed; S3: Check the coaxiality of the workbench (5), the fixture (1), and the first bearing (6), and install the dial indicator (3) on the top surface of the first inner ring (10) of the first bearing (6) again. Use the dial indicator (3) to judge and adjust the coaxiality of the workbench (5), the fixture (1), and the first bearing (6) to within 1 / 2 of the specified range of radial runout after the large gear ring is installed. After the coaxiality test is completed, lock the fixture (1) and the workbench (5); S4: Check the coaxiality of the large gear ring (4) and the workbench (5), install the dial indicator (3) on the top surface of the first inner ring (10) of the first bearing (6) again, use the dial indicator (3) to judge and adjust the coaxiality of the large gear ring (4) and the workbench (5) within the specified range of radial runout after the large gear ring (4) is installed, and after the coaxiality inspection is completed, lock the large gear ring (4) and the workbench (5), remove the fixture (1), the first bearing (6), and the dial indicator (3); S5: Correct the coaxiality of the workbench (5) and the turntable base (36), fix the dial indicator (3) on the turntable base (36), and use the dial indicator (3) to judge and adjust the coaxiality of the workbench (5) and the turntable base (36) to be within the specified range of radial runout after the large gear ring (4) is installed.

2. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 1, characterized in that: In S3, an inner hole (19) is provided on the workbench (5), and the jig (1) is set on the inner hole (19). A through hole (7) is provided on the jig (1) and the through hole (7) is communicated with the inner hole (19) of the workbench (5). After the dial indicator (3) is fixed, the needle of the dial indicator (3) points to and touches the side wall of the inner hole (19) of the workbench (5). The first bearing (6) rotates at least one circle and the dial indicator (3) rotates synchronously therewith. The value of the dial indicator (3) is read, and the coaxiality of the workbench (5), the jig (1) and the first bearing (6) is judged by the value to be within 1 / 2 of the specified range value of the radial runout after the large gear ring is installed. If it is not within 1 / 2 of the specified range value of the radial runout after the large gear ring (4) is installed, the horizontal position of the jig (1) is adjusted and the above steps are repeated to measure the coaxiality. The coaxiality of the workbench (5), the jig (1) and the first bearing (6) is measured until it is within the specified range of radial runout after the large gear ring (4) is installed. The coaxiality inspection of the workbench (5), the jig (1) and the first bearing (6) is completed. An adapter plate (14) is fixed on the first inner ring (10) of the first bearing (6) to facilitate the rotation of the first bearing (6). A raised protrusion (22) is protruding from the adapter plate (14). Before the jig (1) is set on the workbench (5), the adapter plate (14) is first fixed on the jig (1), and then the jig (1) is set on the workbench (5). Then, the micrometer (3) is fixed on the top surface of the raised protrusion (22). After the coaxiality measurement of the workbench (5), the jig (1) and the first bearing (6) is completed, the micrometer (3) is removed.

3. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 2, characterized in that: In S4, the large gear ring (4) is set on the workbench (5), and after the dial indicator (3) is fixed, the needle of the dial indicator (3) points to and touches the inner side wall of the large gear ring (4), the first bearing (6) rotates at least one circle and the dial indicator (3) rotates synchronously therewith, and the value of the dial indicator (3) is read. It is judged by the value whether the coaxiality of the large gear ring (4) and the workbench (5) is within the specified range of radial runout after the large gear ring (4) is installed. If it is not within the specified range of radial runout after the large gear ring (4) is installed, the horizontal position of the large gear ring (4) is adjusted, and the measurement is repeated according to the above steps until the coaxiality of the large gear ring (4) and the workbench (5) is within the specified range. After the gear ring (4) is installed, the radial runout is within the specified range value, and the coaxiality inspection of the large gear ring (4) and the workbench (5) is completed. An extension piece (27) is fixedly installed on the raised protrusion (22) to facilitate the needle of the dial indicator (3) to approach the inner circle of the large gear ring (4). The extension piece (27) is provided with a slide groove (31) for the dial indicator (3) to slide radially along the first bearing (6). After the large gear ring (4) is set on the workbench (5), the dial indicator (3) is fixed in the slide groove (31) of the extension piece (27). After the coaxiality measurement of the large gear ring (4) and the workbench (5) is completed, the dial indicator (3), the extension piece (27) and the adapter plate (14) are removed.

4. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 2, characterized in that: In S5, the workbench (5) is mounted on the turntable base (36), with the side of the workbench (5) on which the large gear ring (4) is mounted facing the turntable base (36). After the dial indicator (3) is fixed, the needle of the dial indicator (3) points to and touches the side wall of the inner hole (19) of the workbench (5). The workbench (5) rotates at least one circle and the dial indicator (3) rotates synchronously therewith. The reading of the dial indicator (3) is read, and the numerical value is used to determine whether the coaxiality of the workbench (5) and the turntable base (36) is within the specified range of radial runout after the large gear ring (4) is installed. If not, the coaxiality is within the specified range of radial runout after the large gear ring (4) is installed. The position of the workbench (5) in the horizontal direction is adjusted, and the above steps are repeated until the coaxiality of the workbench (5) and the turntable base (36) is within the specified range of radial runout after the large gear ring (4) is installed. The coaxiality of the workbench (5) and the turntable base (36) is completed. After the workbench (5) is installed on the turntable base (36), an auxiliary bracket (37) is fixed on the turntable base (36). The micrometer (3) is fixed on the auxiliary bracket (37). After the coaxiality measurement of the workbench (5) and the turntable base (36) is completed, the auxiliary bracket (37) is removed.

5. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 2, characterized in that: In S3, after the jig (1) is set on the workbench (5), the locking force of the jig (1) and the workbench (5) is gradually increased, and the coaxiality of the workbench (5), the jig (1), and the first bearing (6) is measured multiple times under different locking forces until the measurement is stopped after the jig is completely locked.

6. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 2, characterized in that: In S3, the jig (1) and the workbench (5) are fixed by thread locking, and the bolts are pre-tightened to the jig (1) and the workbench (5) according to the torque from small to large. In the process of gradually increasing the torque, the coaxiality of the workbench (5) and the jig (1) is measured multiple times until the torque reaches 100%. According to the steps of S3, the measurement value on the micrometer (3) is read at each measurement, and the measurement value is kept within 1 / 2 of the specified range of the radial runout after the large gear ring (4) is installed.

7. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 3, characterized in that: In S4, after the large gear ring (4) is set on the workbench (5), the locking force between the large gear ring (4) and the workbench (5) is gradually increased. In the process of gradually increasing the locking force, the coaxiality of the large gear ring (4) and the workbench (5) is measured multiple times according to the steps in S4 under different locking forces, and the measurement is stopped after the large gear ring (4) and the workbench (5) are completely locked.

8. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 7, characterized in that: In S4, the large gear ring (4) and the workbench (5) are fixed by thread locking, and the bolts pre-tighten the large gear ring (4) and the workbench (5) according to the torque from small to large. In the process of gradually increasing the torque, the coaxiality of the large gear ring (4) and the workbench (5) is measured multiple times until the torque reaches 100%. According to the steps of S4, the value of the micrometer (3) is read at each measurement. The measured values ​​are all within the specified range of radial runout after the large gear ring (4) is installed.

9. The method for detecting radial runout of a large gear ring of a gear ring type turntable according to claim 8, characterized in that: When measuring the coaxiality between the workbench (5) and the fixture (1), the coaxiality between the workbench (5) and the fixture (1) is measured under the conditions that the torque of the bolt is selected as 40%, 70%, and 100% respectively. When measuring the coaxiality between the workbench (5) and the large gear ring (4), the coaxiality between the workbench (5) and the large gear ring (4) is measured under the conditions that the torque of the bolt is selected as 40%, 70%, and 100% respectively.

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