Method for detecting radial run-out of large gear ring of gear ring type rotary table

Abstract

The invention relates to the technical field of rotary table large gear ring radial run-out detection, in particular to a gear ring type rotary table large gear ring radial run-out detection method, which comprises the steps of selecting a jig and measuring the radial run-out of a large gear ring mounted on a working table, and the radial run-out can be obtained by measuring the coaxiality of the large gear ring and the working table. Firstly, the first bearing is installed on the jig for self-inspection, whether the coaxiality of the jig and the first bearing is within the specified range or not is measured, then the jig is installed on the workbench, whether the coaxiality of the jig and the workbench is within the specified range or not is measured, and then the large gear ring is installed on the workbench. And measuring whether the coaxiality of the large gear ring workbench is within a specified range, finally installing the workbench provided with the large gear ring on the turntable base, and measuring whether the coaxiality of the workbench and the turntable base is within the specified range. According to the invention, the tool with the precision meeting the requirement is used for measurement, the radial run-out precision of the measured large gear ring after installation is ensured, and the overall precision of the gear ring type rotary table is improved.

Description

Technical Field

[0001] The present application relates to the technical field of radial runout detection 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. Background Art

[0002] The gear ring type turntable is a mechanical transmission structure that can be matched with worktables, cutters and other components to achieve various forms of processing tasks. It 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 worktable arranged on the turntable base. The small gear ring is connected to the driving device and meshes with the large gear ring, thereby driving the large gear ring to rotate. The large gear ring is installed on the worktable, and the rotation of the large gear ring drives the worktable to rotate. Radial runout refers to the change in the radial position of the large gear ring relative to the axis of the gear during its rotation. If the radial runout of the large gear ring is large, the deviation of the worktable during rotation will also become larger, thereby affecting the positioning accuracy of the workpiece on the worktable.

[0004] In order to ensure the rotation accuracy of the workbench, it is necessary to detect 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 mandrel to rotate the positioning mandrel and connect it to the workbench. The base of the micrometer is adsorbed on the surface of the positioning mandrel, and the positioning mandrel 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 based on the readings obtained by the micrometer along one circle of the inner circle of the large gear ring. When the positioning mandrel is rotated, the coaxiality of the rotation axis of the positioning mandrel 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 type turntable is needed to ensure accurate measurement of the radial runout of the large gear ring after installation, improve the accuracy of detection, and thereby ensure the overall accuracy of the gear ring type turntable and improve the machining 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] The present 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: 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, the selected jig is provided with an annular measuring surface for measurement by a micrometer, the annular measuring surface is an inner annular surface on the jig, and the center line of the annular measuring surface coincides with the center line of the jig; S2: mutual inspection of the coaxiality of a first bearing and a jig is performed, a micrometer is installed on the top surface of a first inner ring of the first bearing, and the micrometer is used to judge and adjust the coaxiality of the first bearing and the jig within 1 / 4 of the specified range value of radial runout after the large gear ring is installed, and after mutual inspection, the first outer ring of the first bearing is locked with the jig, and the micrometer is removed; S3: the coaxiality of the workbench, the jig, and the first bearing is inspected, and the micrometer is installed again on the top surface of the first inner ring of the first bearing , use a micrometer to judge and adjust the coaxiality of the workbench, the fixture, and the first bearing 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 micrometer on the top surface of the first inner ring of the first bearing again, use the micrometer to judge and adjust the coaxiality of the large gear ring and the workbench 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, the first bearing, and the micrometer; S5: Correct the coaxiality of the workbench and the turntable base, fix the micrometer on the turntable base, use the micrometer to judge and adjust the coaxiality of the workbench and the turntable base within the specified range of radial runout after the large gear ring is installed.

[0008] By adopting the above technical scheme, 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 is not up to 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 after the large gear ring is installed, thereby improving the overall accuracy of the gear ring type turntable.

[0009] 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 micrometer is fixed, the needle of the micrometer points to and touches the side wall of the inner hole of the workbench. The first bearing rotates at least one circle and the micrometer rotates synchronously therewith. The value of the micrometer is read 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, the jig and the first bearing is within the specified range of radial runout after the large gear ring is installed. The coaxiality inspection of the workbench, the jig and the 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, the adapter plate is first fixed to the jig, and then the jig is set on the workbench. Then the micrometer is fixed to the top surface of the raised protrusion. After the coaxiality measurement of the workbench, the jig and the first bearing is completed, the micrometer is removed.

[0010] By adopting the above technical solution, the micrometer is fixed on the raised protrusion, which increases the height of the micrometer, facilitates the position of the micrometer needle to adjust the position, and then facilitates the micrometer 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.

[0011] Optionally, in S4, the large gear ring is set on the workbench, and after the micrometer is fixed, the needle of the micrometer points to and touches the inner circumferential side wall of the large gear ring, the first bearing rotates at least one circle and the micrometer rotates synchronously therewith, and the value of the micrometer is read. It is judged by the value 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.

[0012] By adopting the above technical solution and setting the extension piece, the base of the micrometer can slide radially along the first bearing with the help of the extension piece, thereby facilitating the needle of the micrometer to smoothly touch the inner side wall of the large gear ring.

[0013] 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 coaxiality of the workbench and the turntable base is determined by the numerical value whether it is within the specified range of radial run-out after the large gear ring is installed. If it is not within the specified range of radial run-out 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 run-out 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.

[0014] By adopting the above technical solution, the micrometer is fixed on the auxiliary bracket on the turntable base, which makes it easy for the micrometer needle to touch the inner hole side wall of the workbench and avoids the micrometer needle from touching the inner hole side wall of the workbench due to the measuring stroke of the micrometer being too small.

[0015] 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.

[0016] By adopting the above technical solution, the influence of different locking forces on the coaxiality measurement of the fixture and the workbench can be avoided, thereby improving the accuracy of the coaxiality measurement of the fixture and the workbench.

[0017] Optionally, in S3, the jig and the workbench are fixed by thread locking, and the bolts are pre-locked on 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 measured value on the micrometer is read at each measurement according to the steps of S3, and the measured values ​​are kept within 1 / 2 of the specified range of radial runout after the large gear ring is installed.

[0018] 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, so as to avoid the influence of different locking forces on the coaxiality measurement of the workbench, the fixture and the first bearing, and improve the accuracy of the measurement results.

[0019] Optionally, in S4, after the large gear ring is set on the workbench, the locking force between the large gear ring and the workbench is gradually increased. In the process of gradually increasing the locking force, the coaxiality of the large gear ring and the workbench is measured multiple times according to the steps in S4 under different locking forces until the measurement is stopped after complete locking.

[0020] 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.

[0021] Optionally, in S4, the large gear ring and the workbench are fixed by threaded locking, and the bolts are pre-locked on the large gear ring and the workbench according to torques 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.

[0022] By adopting the above technical solution, the locking force of the large gear ring and the workbench is gradually adjusted by means of threaded locking of the large gear ring and the workbench. Multiple measurements are taken during the process of different torques of the bolts 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.

[0023] 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.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. First, use a jig that meets the accuracy 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 gear ring is installed. Then measure the coaxiality of the jig and the workbench, the large gear ring, and the turntable base to ensure the accuracy of the coaxiality of the measured large gear ring and the workbench, and then obtain the accurate radial runout accuracy of the large gear ring after installation, thereby improving the overall installation accuracy of the gear ring type turntable; 2. Fix the dial gauge on the raised protrusion to increase the height of the dial gauge, which is convenient for adjusting the position of the dial gauge needle, and further facilitates the dial gauge 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; 3. The setting of the extension piece makes it easier for the base of the micrometer to slide radially along the first bearing with the help of the extension piece, thereby facilitating the needle of the micrometer to smoothly touch the inner circumferential side wall of the large gear ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the fixture in the embodiment of the present application; Figure 2 A cross-sectional view of the first bearing, the fixture and the micrometer in the embodiment of the present application; Figure 3 This is a cross-sectional view of the adapter plate installed on the first bearing in the embodiment of the present application; Figure 4 It is a partial cross-sectional view of the adapter plate, the first bearing, the fixture, the workbench, and the micrometer in the embodiment of the present application; Figure 5 It is a partial cross-sectional view of the extension member, the adapter plate, the first bearing, the fixture, the workbench, the large gear ring, and the micrometer in the embodiment of the present application; Figure 6 It is an exploded schematic diagram of the extension member, the adapter plate, the first bearing, the fixture, the large gear ring, and the workbench in the embodiment of the present application; Figure 7 This is an exploded schematic diagram of the workbench, the large gear ring, and the turntable base in the embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the workbench, the large gear ring, the turntable base, the micrometer, and the auxiliary bracket in the embodiment of the present application; Fig. 9 It is a cross-sectional view of the workbench, large gear ring, turntable base, micrometer, and auxiliary bracket in the embodiment of the present application.

[0026] 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, round hole; 17, fourth threaded hole; 18, second bolt; 19, inner hole; 20, limit 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

[0027] The following is combined with Figure 1-9 This application is described in further detail.

[0028] Example: A method for detecting radial runout of a large gear ring of a gear ring type rotary table, referring to Figure 1 In S1, the detection method includes a fixture 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 fixture 1, and the center line of the annular measuring surface 2 coincides with the center line of the fixture 1.

[0029] refer to Figure 1 and Figure 2 In 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, and 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, and 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 the radial runout after the large gear ring 4 is installed. At this time, the first bearing 6 and the fixture 1 are locked, and 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 with the second threaded hole 12 to realize the locking and fixation of the fixture 1 and the first bearing 6, and the micrometer 3 is removed to proceed to the next step.

[0030] refer to Figure 3 and Figure 4Before S3, the adapter plate 14 is first fixed on 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 the positions correspond. A second bolt 18 is arranged in the fourth threaded hole 17, and 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 realize the 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 threaded hole 18. The sum of the hole depths of the grooved hole 15, the round hole 16, and the fourth threaded hole 17, an inner hole 19 is opened on the workbench 5, and the bottom of the fixture 1 protrudes to form a limit ring 20. The fixture 1 fixed with the first bearing 6 is installed at the inner hole 19, the through hole 7 of the fixture 1 is connected with the inner hole 19 of the workbench 5, the bottom surface of the fixture 1 is in conflict 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.

[0031] refer to Figure 3 and Figure 4The surface of the adapter plate 14 is protruding with a plurality of raised protrusions 22, and the base of the micrometer 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 micrometer 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 in the sixth threaded hole 25 to achieve the 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 micrometer 3 is synchronously rotated accordingly. 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, and 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 of radial runout after the large gear ring 4 is installed. Remove the micrometer 3 and proceed to the next step.

[0032] refer to Figure 5 and Figure 6In S4, the large gear ring 4 is first installed on the workbench 5, and the padding protrusion 22 is fixedly connected with an extension piece 27 that facilitates the needle of the micrometer 3 to approach the inner circle of the large gear ring 4. The padding protrusion 22 is provided with a seventh threaded hole 28, and the extension piece 27 is provided with an eighth threaded hole 29. The eighth threaded hole 29 is provided with a fifth bolt 30. The fifth bolt 30 passes through the extension piece 27 and is threadedly connected with the seventh threaded hole 28 to achieve locking and fixing of the extension piece 27 and the padding protrusion 22. The extension piece 27 is provided with a slide groove 31, and the slide groove 31 is along the first bearing 6. The base of the micrometer 3 is magnetically attracted in the slide groove 31 and the position of the micrometer 3 along the radial direction of the first bearing 6 can be adjusted, so that the micrometer 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 micrometer 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 with the workbench 5. The large gear ring 4 is provided with a ninth threaded hole 33, and the workbench 5 is provided with a tenth threaded hole 34. The ninth threaded hole 33 is provided with a sixth bolt 35. The sixth bolt 35 passes through the large gear ring 4 and is connected with 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 firstly locked and fixed to the large gear ring 4 and the workbench 5 according to 40%, and the first bearing 6 is driven to rotate at least one circle by rotating the third bolt 21, and the micrometer 3 rotates synchronously therewith, and the reading of the micrometer 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, and the reading control The torque of the sixth bolt 35 is tightened to within 0.02 mm; the torque of the sixth bolt 35 is tightened to 70% to fix the large gear ring 4 and the workbench 5, and the micrometer 3 reading is within 0.02 mm; the torque of the sixth bolt 35 is tightened to 100% to fix the large gear ring 4 and the workbench 5, and the micrometer 3 reading is within 0.02 mm. The coaxiality of the workbench 5 and the large gear ring 4 is within the specified range, and then the fixture 1, the first bearing 6, the micrometer 3, the extension piece 27, and the adapter plate 14 are removed to proceed to the next step.

[0033] refer to Figure 8 and Fig. 9In S5, a second bearing 39 is installed on the turntable base 36, and a 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 workbench 5 to rotate. A second inner ring 40 of the second bearing 39 is threadedly locked with a transfer sleeve 38. A long hole is opened on the second inner ring 40, and a bolt passing through the long hole is provided on the transfer sleeve 38. One end of the bolt passing through the second inner ring 40 is threadedly connected with a nut ( (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 installed faces 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 with Figure 7 The turntable base 36 is provided with a driving source and a small gear ring 42 meshing 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. The motor 43 drives the small gear ring 42 to rotate, and the small gear ring 42 drives the large gear ring 4 and the workbench 5 to rotate. An auxiliary bracket 37 is welded on the turntable base 36. The base of the micrometer 3 is magnetically attracted to the auxiliary bracket 37. The pointer of the micrometer 3 points to and touches the measuring surface 23 of the workbench. The workbench 5 rotates at least one circle and the micrometer 3 rotates synchronously therewith. The reading of the micrometer 3 is read. If the reading is controlled at 0. 0.02mm, that is, the coaxiality of the worktable 5 and the turntable base 36 is within the prescribed range of the radial run-out after the large ring gear 4 is installed. If it is not within the prescribed range of the radial run-out after the large ring gear 4 is installed, adjust the horizontal position of the worktable 5 and measure again to control the reading within 0.02mm. The coaxiality of the worktable 5 and the turntable base 36 is within the prescribed range of the radial run-out after the large ring gear 4 is installed. At this time, the worktable 5 and the adapter sleeve 38 are threadedly locked to complete the assembly of the ring gear type turntable, ensuring the accuracy of the radial run-out of the large ring gear 4 after installation and improving the overall accuracy of the ring gear type turntable.

[0034] The implementation principle of the embodiment of the present application is as follows: by measuring the coaxiality of the large gear ring 4 and the workbench 5, the radial runout of the large gear ring 4 after installation can be obtained. First, the first bearing 6 is installed on the fixture 1 for self-inspection. If the reading of the micrometer 3 is controlled within 0.005mm, the coaxiality of the fixture 1 and the first bearing 6 meets the requirements. The first bearing 6 is threadedly locked on the fixture 1, and the micrometer 3 is removed; then the fixture 1 is installed on the workbench 5, the adapter plate 14 is threadedly locked on the first bearing 6, and the coaxiality of the fixture 1 and the workbench 5 is measured. If the reading of the micrometer 3 is controlled within 0.01mm, the coaxiality of the fixture 1, the first bearing 6 and the workbench 5 meets the requirements. The fixture 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 gear ring 4 and the worktable 5, and if the reading of the micrometer 3 is controlled within 0.02 mm, the coaxiality of the first bearing 6, the fixture 1, the large gear ring 4, and the worktable 5 meets the requirements. Thread the large gear ring 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 gear ring 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 if the reading of the micrometer 3 is controlled 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 precision of the large gear ring 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 micrometer (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 determine and adjust the coaxiality of the first bearing (6) and the jig (1) to 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 micrometer (3) on the top surface of the first inner ring (10) of the first bearing (6) again. Use the micrometer (3) to determine 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, the fixture (1) and the workbench (5) are locked; S4: Check the coaxiality of the large gear ring (4) and the workbench (5), install the dial gauge (3) on the top surface of the first inner ring (10) of the first bearing (6) again, use the dial gauge (3) to determine 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), and remove the fixture (1), the first bearing (6), and the dial gauge (3); S5: Correct the coaxiality between the workbench (5) and the turntable base (36), fix the micrometer (3) on the turntable base (36), and use the micrometer (3) to determine and adjust the coaxiality between 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. A 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 arranged on the inner hole (19). A through hole (7) is provided on the jig (1) and the through hole (7) is connected to the inner hole (19) of the workbench (5). After the micrometer (3) is fixed, the needle of the micrometer (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 micrometer (3) rotates synchronously therewith. The value of the micrometer (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 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 (4) is installed, the horizontal position of the jig (1) is adjusted, and the above steps are followed to measure again. The coaxiality of the workbench (5), the jig (1) and the first bearing (6) is measured until the coaxiality of the workbench (5), the jig (1) and the first bearing (6) 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 micrometer (3) is fixed, the needle of the micrometer (3) points to and touches the inner circumferential side wall of the large gear ring (4), the first bearing (6) rotates at least one circle and the micrometer (3) rotates synchronously therewith, and the value of the micrometer (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 micrometer (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 micrometer (3) to slide radially along the first bearing (6). After the large gear ring (4) is set on the workbench (5), the micrometer (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 micrometer (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 micrometer (3) is fixed, the needle of the micrometer (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 micrometer (3) rotates synchronously therewith. The reading of the micrometer (3) is read, and the coaxiality of the workbench (5) and the turntable base (36) is determined by the numerical value to be within the prescribed range of radial runout after the large gear ring (4) is installed. If not, the coaxiality is within the prescribed range of radial runout after the large gear ring (4) is installed. The position of the workbench (5) in the horizontal direction is adjusted within the range value, and the measurement is repeated according to the above steps until the coaxiality of the workbench (5) and the turntable base (36) is within the specified range value of the 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), and 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 between 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 at different locking forces until the measurement is stopped after the workbench (5) is completely locked.

6. A 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 torques 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 measured value on the micrometer (3) is read at each measurement, and the measured value is kept within 1 / 2 of the specified range of 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 are pre-tightened with 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%. The value of the micrometer (3) 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 (4) is installed.

9. A 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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