A disassembly and assembly method of a strong magnetic torque rotary table

Abstract

The present invention provides a method for disassembling and assembling a strong magnetic torque rotary table. During disassembly, the circular grating and the axial preload bearing are first removed, and then a guide column is fixedly installed at the center of the bottom of the main shaft body of the table rotating shaft; a guide column guide sleeve is fixedly installed at the center of the bottom of the table main body seat, the guide column guide sleeve cooperates with the guide column plug sleeve, and the guide column is coaxial with the shaft hole of the table rotating shaft; then the table rotating shaft is lifted, and before the main shaft body of the table rotating shaft is lifted up and does not separate from the sliding centering bearing on the table main body seat, an annular installation pad is fixedly installed on the top of the table main body seat, and the rotor magnetic steel ring of the table rotating shaft is positioned at the center of the stator coil by a positioning block, and then the table rotating shaft is lifted and taken out; the reassembly process is reversed.

Description

Technical Field

[0001] The invention belongs to the technical field of numerical control equipment maintenance, and in particular relates to a method for disassembling and assembling a strong magnetic torque rotary table. Background Art

[0002] With the development of science and technology, high-tech and high-precision components have been widely used in CNC equipment. For example, high-precision torque direct-drive rotary tables have replaced the rotary tables that were previously driven by reduction boxes and worm gears, thereby reducing the cumulative errors caused by traditional mechanical transmission chains and achieving the advantages of high torque, smooth transmission, fast response speed, and precise positioning.

[0003] After a certain number of years of use, the core components of the strong magnetic torque motor direct-driven rotary table in high-precision equipment will also suffer mechanical damage (such as wear of the load-bearing bearings, centering bearings, axial preload bearings, etc.), resulting in a decrease in the accuracy of its movement and failing to meet the product processing accuracy requirements. In this case, the table needs to be disassembled and repaired. The difficulty of repairing the table lies in: "disassembly and installation of the torque motor rotor and stator". Since a strong magnetic sheet is attached to the outside of the rotating shaft of the table, under the influence of strong magnetism, if it is disassembled and installed rashly, it will inevitably cause damage to the rotor magnetic steel sheet, resulting in the movement accuracy of the rotary table cannot be guaranteed or directly causing the entire table to be scrapped. Therefore, its maintenance cost is high and difficult. As a high-precision component, it requires maintenance personnel to have high professional and technical capabilities. Usually in this case, the manufacturer is contacted for repair and repair. The high repair cost and long repair time bring great economic losses to the equipment users. Summary of the invention

[0004] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a method for disassembling and assembling a strong magnetic torque rotary worktable, which uses self-made tooling components to allow the rotating axis of the worktable to always remain at the center position of the stator during the lifting, removal and installation process, thereby effectively solving the problem of disassembly and installation of the torque motor rotary worktable.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A method for disassembling and assembling a strong magnetic torque rotary table, the strong magnetic torque rotary table comprising a table rotating shaft and a table main body seat, a rotor mounting portion, an axial hole and a main shaft body are arranged on the table rotating shaft, the rotor mounting portion is arranged in an annular shape at the periphery of the main shaft body, the axial hole is arranged in the center of the rotary table and passes through the main shaft body up and down, the main shaft body is arranged at the lower central position of the rotary table and is located in the central through hole of the table main body seat, the main shaft body is mounted on the table main body seat through a sliding centering bearing and an axial preload bearing and can rotate, a rotor magnetic steel ring is installed on the outer side wall of the rotor mounting portion, a stator coil adapted to the rotor magnetic steel ring is installed in the table main body seat, a plane load-bearing bearing is installed between the table bottom of the table rotating shaft and the top of the table main body seat, and a circular grating is installed at the bottom of the main shaft body;

[0007] The steps to disassemble the workbench rotating shaft are as follows:

[0008] 1.1 Remove the circular grating at the bottom of the rotating axis of the workbench;

[0009] 1.2 Remove the axial preload bearing;

[0010] 1.3 A guide column is fixedly installed at the center of the bottom of the main shaft body of the workbench rotating shaft; a guide column guide sleeve is fixedly installed at the center of the bottom of the workbench main seat, the guide column guide sleeve cooperates with the guide column plug sleeve, and the guide column is coaxial with the shaft hole of the workbench rotating shaft;

[0011] 1.4 Lift the rotating shaft of the workbench until the main shaft of the rotating shaft of the workbench is lifted up and before it is separated from the sliding centering bearing on the main seat of the workbench. Fix the annular mounting pad on the top of the main seat of the workbench. The annular mounting pad is set between the rotor magnetic steel ring and the plane load-bearing bearing. Adjust the positions of multiple positioning blocks on the annular mounting pad so that each positioning block is against the rotor magnetic steel ring on the rotating shaft of the workbench, thereby positioning the rotor magnetic steel ring of the rotating shaft of the workbench at the center of the stator coil, and then lift and remove the rotating shaft of the workbench;

[0012] The steps for installing the workbench rotating axis are as follows:

[0013] 2.1 Lift and lower the rotating shaft of the worktable. When lowering, insert the guide pin at the bottom of the rotating shaft of the worktable into the guide hole of the guide pin guide sleeve;

[0014] 2.2 When the main shaft of the worktable rotating shaft enters one-third of the sliding centering bearing, remove the annular mounting pad and positioning block;

[0015] 2.3 After assembling the workbench rotating shaft in place, remove the guide pin and guide sleeve;

[0016] 2.4 Install the axial preload bearing and adjust the circumferential accuracy of the workbench rotating axis and the stator coil as required; install the circular grating to complete the assembly of the entire workbench.

[0017] Preferably, the positioning block is slidably connected to the annular mounting pad and can be driven to move radially along the rotating axis of the workbench by adjusting bolts.

[0018] Preferably, the adjusting bolt is threadedly connected to the annular mounting pad, the inner end of the positioning block is used to abut against the rotating shaft of the workbench, and the outer end of the positioning block is in contact with the adjusting bolt.

[0019] Preferably, when removing the circular grating at the bottom of the workbench rotating axis, mark the installation position to facilitate subsequent installation.

[0020] Preferably, when removing the axial preload bearing, the tightening torque of the screw is measured with a torque wrench to facilitate subsequent installation.

[0021] Preferably, the guide column is provided with a flange portion, which is fixedly connected to the bottom of the main shaft body of the worktable rotating shaft through fasteners. The upper part of the guide column located above the flange portion is inserted into the axial hole of the worktable rotating shaft, and the lower part of the guide column located below the flange portion is sleeved with a guide column guide sleeve.

[0022] Preferably, a flange portion is provided on the guide column and guide sleeve, and the flange portion is fixedly connected to the bottom of the workbench main seat by a fastener, and the guide hole of the guide column and guide sleeve is coaxially arranged with the axial hole of the workbench rotating shaft.

[0023] Preferably, the annular mounting pad is formed by splicing two semicircular half-ring plates, and the ends of the two half-ring plates are overlapped and spliced ​​up and down; the two half-ring plates are respectively fixed to the workbench main body seat by a plurality of fixing bolts.

[0024] Preferably, the annular mounting pad is provided with a slide groove matching the positioning block, a threaded hole is opened on the outer wall of the slide groove, the adjusting bolt is threadedly connected to the threaded hole, the inner side of the slide groove is open, the positioning block is embedded in the opening of the slide groove and can slide under the push of the adjusting bolt.

[0025] Preferably, the positioning block is made of nylon, and the inner end of the positioning block that contacts the rotating shaft of the workbench is V-shaped; four positioning blocks are evenly distributed on the annular mounting pad.

[0026] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0027] The self-made tooling assembly is used to keep the rotating axis of the workbench at the center of the stator during the lifting, removal and installation process, effectively avoiding the strong magnetic attraction between the stator and the rotor when the rotating main shaft is separated from the centering bearing, avoiding the strong collision between the stator and the rotor due to the mutual attraction, causing the magnetic steel sheet to be broken and damaged, resulting in the scrapping of the entire workbench, effectively reducing the repair cost, reducing the repair time, and minimizing the economic losses of the enterprise. This method is convenient and reliable in actual operation, economical and practical, and effectively overcomes the difficulty of disassembly and installation of the torque motor rotary workbench. It is very easy to promote and is suitable for the fault repair of related strong magnetic torque rotary workbenches at home and abroad, and has broad application prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present application. The illustrative embodiments of the present invention and their description are used to explain the present application, but do not constitute a limitation on the present application.

[0029] Figure 1 It is a structural diagram of the rotary table.

[0030] Figure 2 This is one of the disassembly and assembly diagrams of the rotary table (guide pillars are installed at the bottom of the table's rotating axis).

[0031] Figure 3 This is the second diagram of the disassembly and assembly of the rotary table (the rotating axis of the table is lifted to a certain height and the positioning block is installed).

[0032] Figure 4 This is the third diagram of the disassembly and assembly of the rotary table (the rotating axis of the table is hoisted as a whole).

[0033] Figure 5 This is a schematic diagram of the installation structure of the positioning block.

[0034] Figure 6 yes Figure 5 AA section view.

[0035] Among them, 1. workbench rotating axis; 2. plane load-bearing bearing; 3. workbench main seat; 4. stator coil; 5. rotor magnetic steel ring; 6. sliding centering bearing; 7. axial preload bearing; 8. circular grating; 9. guide column; 10. guide column guide sleeve; 11. positioning block; 12. annular mounting pad; 13. adjusting bolt; 14. tightening bolt. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of the present invention, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprises" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] This embodiment takes the disassembly, assembly and repair of a high-power RAPID1250 gear grinding machine torque direct-drive rotary table as an example to illustrate the specific implementation process of the method of the present invention.

[0045] RAPID1250 is a high-precision CNC forming gear grinding machine produced by Hofler in Germany. After the parts were ground and processed by this equipment and sent for measurement, it was found that the accumulated tolerance was serious, showing a regional cliff shape, and the first teeth on the right tooth surface were always not well adjacent, which could not meet the accuracy requirements of the product. After inspection, it was found that the accuracy of the workbench was out of tolerance, the radial runout of the workbench was 0.015mm per rotation, and there was noise when rotating. This is mainly due to the fact that the accuracy of the load-bearing bearings, centering bearings, and axial preload bearings of the core components inside the workbench have been damaged during the long-term operation of the equipment. Therefore, the workbench needs to be disassembled and the bearings replaced.

[0046] The strong magnetic torque rotary table of the equipment is as follows Figure 1 As shown, it includes a workbench rotating shaft 1 and a workbench main body seat 3. The workbench rotating shaft 1 is provided with a rotor mounting portion 101, an axial hole 102 and a spindle body 103. The rotor mounting portion 101 is annularly arranged on the periphery of the spindle body 103. The axial hole 102 is arranged at the center of the rotary workbench and passes through the spindle body 103 up and down. The spindle body 103 is arranged at the lower central position of the rotary workbench and is located in the central through hole of the workbench main body seat 3. The spindle body 103 is mounted on the workbench main body seat 3 through a sliding centering bearing 6 and an axial preload bearing 7 and can rotate. A rotor magnetic steel ring 5 is installed on the outer wall of the rotor mounting portion 101. A stator coil 4 compatible with the rotor magnetic steel ring 5 is installed in the workbench main body seat 3. A plane load-bearing bearing 2 is installed between the bottom of the table surface of the workbench rotating shaft 1 and the top of the workbench main body seat 3, and a circular grating 8 is installed at the bottom of the spindle body 103.

[0047] Since the rotor magnetic steel ring 5 (strong magnetic sheet) is installed on the rotating shaft 1 of the workbench, rash disassembly and installation will inevitably cause damage to the magnetic steel sheet. Therefore, "disassembly and installation of the torque motor rotor and stator" has become a difficult problem for disassembly and installation of the torque motor rotary workbench. In order to avoid the strong magnetic attraction between the stator and the rotor when the rotating shaft of the workbench is separated from the centering bearing, resulting in the strong collision between the stator and the rotor due to the mutual attraction, causing the magnetic steel sheet to be broken and damaged, resulting in the scrapping of the entire workbench, the inventor surveyed, designed, and made a tooling assembly by himself, such as Figures 2 to 6 As shown, including:

[0048] A guide post 9 is used to be fixed at the bottom center of the main shaft body 103 of the workbench rotating shaft 1, and the upper part of the guide post 9 is inserted into the shaft hole 102 of the workbench rotating shaft 1;

[0049] A guide post guide sleeve 10 is used to be fixed at the center of the bottom of the workbench main body seat 3, and the guide post guide sleeve 10 has a guide hole that cooperates with the guide post 9 sleeve;

[0050] A ring-shaped mounting pad 12 for fixing on the top of the workbench main seat 3,

[0051] A plurality of positioning blocks 11 are mounted on an annular mounting pad 12. When the annular mounting pad 12 is located at the periphery of the rotor mounting portion 101 of the worktable rotating shaft 1, the plurality of positioning blocks 11 are evenly distributed on the periphery of the rotor magnetic steel ring 5. The positioning blocks 11 are slidably connected to the annular mounting pad 12 and are pushed to move radially along the worktable rotating shaft 1 through adjusting bolts 13.

[0052] The disassembly and assembly method of the strong magnetic torque rotary table of the present invention comprises the following steps for disassembling the rotating shaft of the table:

[0053] 1.1 Remove the circular grating 8 at the bottom of the workbench rotating shaft and mark the installation position;

[0054] 1.2 Remove the axial preload bearing 7 and use a torque wrench to measure the screw tightening torque during disassembly;

[0055] 1.3 As Figure 2 As shown, a guide post 9 is fixedly installed at the center of the bottom of the main shaft body of the workbench rotating shaft; a guide post guide sleeve 10 is fixedly installed at the center of the bottom of the workbench main body seat, and the guide post guide sleeve 10 is matched with the guide post 9 sleeve, and the guide post 9 is coaxial with the shaft hole of the workbench rotating shaft;

[0056] 1.4 As Figure 3As shown, the workbench rotating shaft 1 is lifted. Before the main shaft body 103 of the workbench rotating shaft 1 is lifted and not separated from the sliding centering bearing 6 on the workbench main body seat 3, an annular mounting pad 12 is fixedly installed on the top of the workbench main body seat 3. The annular mounting pad 12 is set between the rotor magnetic steel ring 5 and the plane load-bearing bearing 2. The positions of multiple positioning blocks 11 on the annular mounting pad 12 are adjusted so that each positioning block 11 is against the rotor magnetic steel ring 5 on the workbench rotating shaft 1, thereby positioning the rotor magnetic steel ring 5 of the workbench rotating shaft 1 at the center position of the stator coil 4. This step is very critical and must not be taken lightly. The purpose is to keep the workbench rotating shaft 1 at the center position of the stator during the lifting and removal process, so as to avoid the stator and rotor being attracted by strong magnetism when the workbench rotating shaft 1 is separated from the sliding centering bearing 6, resulting in the possibility that the stator and rotor will collide strongly due to mutual attraction, causing the magnetic steel sheet to be broken and damaged, and the entire workbench may be scrapped. Then the workbench rotating shaft 1 is lifted and removed, as shown in FIG. Figure 4 shown.

[0057] Replace the plane bearings and sliding centering bearings with damaged precision according to the assembly accuracy requirements, and reinstall the workbench rotating shaft. The reinstallation process is the reverse of the disassembly process. The steps for installing the workbench rotating shaft are as follows:

[0058] 2.1 Lift and lower the worktable rotating shaft 1, and insert the guide post 9 at the bottom of the worktable rotating shaft 1 into the guide hole of the guide post guide sleeve 10 during lowering;

[0059] 2.2 When the rotor magnetic steel ring 5 on the workbench rotating shaft 1 descends, it is positioned at the center by the multiple positioning blocks 11 on the annular mounting pad 12; when the main shaft body 103 of the workbench rotating shaft 1 enters the sliding centering bearing 6 by one third, the annular mounting pad 12 and the positioning blocks 11 are removed;

[0060] 2.3 After the workbench rotating shaft 1 is assembled in place, remove the guide column 9 and the guide column guide sleeve 10;

[0061] 2.4 Install the axial preload bearing 7, and adjust the circumferential accuracy of the workbench rotating shaft 1 and the stator coil 4 as required; install the circular grating to complete the assembly of the entire workbench.

[0062] In this embodiment, the guide column 9 is preferably provided with a flange portion 901, which is fixedly connected to the bottom of the main shaft body 103 of the workbench rotating shaft 1 through fasteners, and the upper part of the guide column 9 located above the flange portion 901 is inserted into the shaft hole 102 of the workbench rotating shaft 1, and the lower part of the guide column 9 located below the flange portion 901 is sleeved with a guide column guide sleeve 10. The guide column guide sleeve 10 is provided with a flange portion 1001, which is fixedly connected to the bottom of the workbench main seat 3 through fasteners, and the guide hole of the guide column guide sleeve 10 is coaxially arranged with the shaft hole 102 of the workbench rotating shaft 1. In this way, the guide column and the guide column guide sleeve can be quickly installed and fixed, and the guide column can be ensured to be coaxial with the workbench rotating shaft, so as to ensure that the gap between the rotor and the stator avoids collision during disassembly and assembly. In addition, the length of the lower part of the guide column 9 should be greater than the length of the main shaft body 103 of the workbench rotating shaft 1.

[0063] This embodiment is preferred, as Figure 5 and Figure 6 As shown, the annular mounting pad 12 is formed by splicing two semi-annular plates, the ends of the two semi-annular plates are overlapped and spliced ​​up and down and connected by fixing bolts 14. The two fixing bolts 14 are preferably two of a plurality of fixing bolts used to fix the annular mounting pad 12 on the top of the workbench main seat 3 to facilitate installation.

[0064] This embodiment is preferred, as Figure 5 As shown, four positioning blocks 11 are evenly distributed on the annular mounting pad 12. The annular mounting pad 12 is provided with a slide groove 1201 matching the positioning block 11, a threaded hole is opened on the outer wall of the slide groove 1201, and the adjusting bolt 13 is threadedly connected with the threaded hole. The inner side of the slide groove 1201 is open, and the positioning block 11 is embedded in the opening of the slide groove 1201 and can slide under the push of the adjusting bolt 13. The inner end of the positioning block 11 is used to abut against the workbench rotating shaft 1, and the outer end of the positioning block 11 abuts against the adjusting bolt 13.

[0065] In this embodiment, the positioning block 11 is preferably a nylon V-shaped block. The inner end of the positioning block (11) that contacts the workbench rotating shaft (1) is V-shaped.

[0066] In order to reliably limit the positioning block 11 on the annular mounting pad 12, it is further preferred that the positioning block 11 is slidably connected to the annular mounting pad 12 via a dovetail slot.

[0067] In order to reduce damage to the workbench and processing workload, it is preferred that the fastening bolts of the fixed guide pillar, guide pillar sleeve and annular mounting pad are threadedly connected and fixed with the existing threaded holes on the workbench rotating shaft or the workbench main body seat.

[0068] Since this tooling assembly can keep the rotating shaft of the workbench at the center of the stator during the lifting, removal and installation process, it avoids the strong magnetic attraction between the stator and the rotor when the rotating shaft of the workbench is separated from the centering sliding bearing, which causes the stator and the rotor to collide strongly due to the attraction, causing the magnetic steel sheet to be broken and damaged, resulting in the scrapping of the entire workbench. This embodiment solves the problem of cumulative and adjacent serious deviations caused by damage to the overall accuracy of the workbench by replacing the load-bearing bearing, the centering bearing, the axial preload bearing and the calibration of the overall accuracy of the workbench. At present, the equipment has been in operation for more than one year after repair, and the processed products can meet the conditions for processing grade 5 precision gears. The successful self-repair and repair of the high-precision torque motor direct-driven rotary workbench directly saved the company more than 500,000 yuan in the cost of pulling the equipment back to the German Hofler manufacturer for repair, and also greatly shortened the equipment repair time. The effective operation of the equipment has created immeasurable economic benefits for the company.

[0069] The method of the invention has a simple structural principle, is economical and practical, is easy to assemble, has obvious advantages in actual operation, is reliable in use, and is convenient to disassemble. It effectively overcomes the difficulty in disassembly and installation of the torque motor rotary table, is very easy to promote and is suitable for the fault repair of related strong magnetic torque rotary tables at home and abroad, and has broad application prospects and promotion value.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "an implementation", "specific implementation", "other implementations", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment, implementation or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above may also be combined in a suitable manner in any one or more embodiments, implementations or examples. The technical solutions recorded in the present invention also include technical solutions formed by any one or more of the specific features, structures, materials or characteristics described above in a separate or combined manner.

[0071] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in the field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for disassembling and assembling a strong magnetic torque rotary worktable, the strong magnetic torque rotary worktable comprises a worktable rotating shaft and a worktable main body seat, a rotor mounting portion, an axial hole and a main shaft body are arranged on the worktable rotating shaft, the rotor mounting portion is annularly arranged on the periphery of the main shaft body, the axial hole is arranged in the center of the rotary worktable and passes through the main shaft body up and down, the main shaft body is arranged at the lower central position of the rotary worktable and is located in the central through hole of the worktable main body seat, the main shaft body is mounted on the worktable main body seat through a sliding centering bearing and an axial preload bearing and can rotate, a rotor magnetic steel ring is installed on the outer wall of the rotor mounting portion, a stator coil adapted to the rotor magnetic steel ring is installed in the worktable main body seat, a plane load-bearing bearing is installed between the table bottom of the worktable rotating shaft and the top of the worktable main body seat, and a circular grating is installed at the bottom of the main shaft body; it is characterized in that The steps to disassemble the workbench rotating shaft are as follows: 1.1 Remove the circular grating at the bottom of the rotating axis of the workbench; 1.2 Remove the axial preload bearing; 1.3 A guide column is fixedly installed at the center of the bottom of the main shaft body of the workbench rotating shaft; a guide column guide sleeve is fixedly installed at the center of the bottom of the workbench main seat, the guide column guide sleeve cooperates with the guide column plug sleeve, and the guide column is coaxial with the shaft hole of the workbench rotating shaft; 1.4 Lift the rotating shaft of the workbench until the main shaft of the rotating shaft of the workbench is lifted up and before it is separated from the sliding centering bearing on the main seat of the workbench. Fix the annular mounting pad on the top of the main seat of the workbench. The annular mounting pad is set between the rotor magnetic steel ring and the plane load-bearing bearing. Adjust the positions of multiple positioning blocks on the annular mounting pad so that each positioning block is against the rotor magnetic steel ring on the rotating shaft of the workbench, thereby positioning the rotor magnetic steel ring of the rotating shaft of the workbench at the center of the stator coil, and then lift and remove the rotating shaft of the workbench; The steps for installing the workbench rotating axis are as follows: 2.1 Lift and lower the rotating shaft of the worktable. When lowering, insert the guide pin at the bottom of the rotating shaft of the worktable into the guide hole of the guide pin guide sleeve; 2.2 When the main shaft of the worktable rotating shaft enters one-third of the sliding centering bearing, remove the annular mounting pad and positioning block; 2.3 After assembling the workbench rotating shaft in place, remove the guide pin and guide sleeve; 2.4 Install the axial preload bearing and adjust the circumferential accuracy of the workbench rotating axis and the stator coil as required; install the circular grating to complete the assembly of the entire workbench.

2. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The positioning block is slidably connected to the annular mounting pad and can be driven to move radially along the rotating axis of the workbench through an adjusting bolt.

3. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The adjusting bolt is threadedly connected with the annular mounting pad, the inner end of the positioning block is used to abut against the rotating shaft of the workbench, and the outer end of the positioning block is in abutment with the adjusting bolt.

4. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: When removing the circular grating at the bottom of the workbench rotating axis, mark the installation position.

5. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: When removing the axial preload bearing, use a torque wrench to measure the screw tightening torque.

6. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The guide column is provided with a flange portion, which is fixedly connected to the bottom of the main shaft body of the workbench rotating shaft through fasteners. The upper part of the guide column located above the flange portion is inserted into the axial hole of the workbench rotating shaft, and the lower part of the guide column located below the flange portion is sleeved with a guide column guide sleeve.

7. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The guide post and guide sleeve are provided with a flange part, which is fixedly connected to the bottom of the workbench main body seat through a fastener, and the guide hole of the guide post and guide sleeve is coaxially arranged with the shaft hole of the workbench rotating shaft.

8. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The annular mounting pad is formed by splicing two semicircular half-ring plates, and the ends of the two half-ring plates are overlapped and spliced ​​up and down; the two half-ring plates are respectively fixed on the workbench main body seat by a plurality of fixing bolts.

9. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The annular mounting pad is provided with a slide groove matching the positioning block, a threaded hole is opened on the outer wall of the slide groove, the adjusting bolt is threadedly connected to the threaded hole, the inner side of the slide groove is open, the positioning block is embedded in the opening of the slide groove and can slide under the push of the adjusting bolt.

10. The method for disassembling and assembling a strong magnetic torque rotary table according to claim 1, characterized in that: The positioning block is made of nylon, and the inner end of the positioning block that contacts the rotating shaft of the workbench is V-shaped; four positioning blocks are evenly distributed on the annular mounting pad.

Images