Installation, welding and processing technology of large shielded motor flywheel end plate
By controlling the deformation of the flywheel end plate through heat fitting, welding, rolling and turning processes, the deformation problem of the flywheel end plate in large shielded motors during installation, welding and processing is solved, and a high-quality fit and support effect between the flywheel end plate and the internal components of the flywheel is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN ELECTRIC POWER EQUIP
- Filing Date
- 2023-12-29
- Publication Date
- 2026-05-29
AI Technical Summary
In large shielded motors, the flywheel end plate is prone to deformation during installation, welding and processing, and it is difficult to fit tightly with the internal components of the flywheel, which affects the subsequent support effect on the motor rotor.
The process involves hot fitting, welding, rolling, and turning. Deformation during welding is controlled by the constraint and fixation of pressure plates and pressure rings. Rolling eliminates stress in the weld and heat-affected zone. Copper cooling rings absorb welding heat. Small cutting amounts and sharp cutting tools are used to reduce machining deformation.
This effectively reduces the deformation of the flywheel end plate during welding and processing, ensures a tight fit with the internal components of the flywheel, improves processing quality and support effect, and guarantees the smooth operation of the motor rotor.
Smart Images
Figure CN117862818B_ABST
Abstract
Description
Technical fields:
[0001] This invention relates to the installation, welding and processing technology of a large shielded motor flywheel end plate, specifically to the field of motor flywheel end plates. Background technology:
[0002] In the field of nuclear power plant main pump motors, to allow the rotor to coast for a certain period of time in the event of a power outage, flywheels are now commonly added to the rotor for energy storage. This ensures that in the event of a power failure, the energy stored in the flywheel can still keep the rotor rotating for a sufficient time to remove residual heat from the reactor, giving the nuclear power plant enough time to shut down the reactor. This prevents a more serious accident caused by the reactor overheating due to the main pump motor shutting down too quickly and losing cooling water.
[0003] The flywheel of an electric motor is mounted on the rotor. For shaft-sealed motors, the flywheel's size is unrestricted, and its structure is relatively simple, requiring only sufficient energy storage. However, for large shielded motors, due to the limited space in the rotor cavity and the need for water contact, the flywheel typically uses a high-density heavy alloy internally, surrounded by thin flywheel end plates and a outer shell, welded and encased. The flywheel end plate is a thin-walled part, prone to deformation during assembly, welding, and machining. Furthermore, it supports the thrust plate on the rotor, requiring high dimensional and positional tolerances on the flywheel end face. Therefore, controlling flywheel end plate deformation during manufacturing is crucial. Summary of the Invention:
[0004] The purpose of this invention is to provide an installation, welding, and processing technology for the flywheel end plate of a large shielded motor, which controls and reduces deformation during the installation, welding, and processing of the flywheel end plate, improves the processing quality of the flywheel assembly, and ensures the support effect of the thrust disc when subsequently installed on the motor rotor.
[0005] The technical solution of this invention is:
[0006] Installation, welding, and processing technology of flywheel end plates for large shielded motors:
[0007] a. Heat fitting flywheel end plate: First, place the flywheel assembly with one side facing up on the flywheel welding tool. Then, place a flywheel end plate in the heating furnace and heat it to 100-150℃. After that, lift the flywheel end plate above the flywheel assembly and heat-fit it onto the flywheel assembly.
[0008] The flywheel end plate and the flywheel in the flywheel assembly maintain an interference fit, while the flywheel end plate and the flywheel hub in the flywheel assembly have a clearance fit. Immediately place the pressure ring on the flywheel end plate. Place the pressure plate on the pressure ring, then screw the thread of the support rod into the threaded hole of the pressure plate and press it against the flywheel welding tool. Screw the fully threaded tie rod through the pressure plate into the threaded hole of the flywheel welding tool. Install the nut onto the fully threaded tie rod and rest it against the pressure plate. Finally, tighten the support rod to press the pressure ring onto the flywheel end plate.
[0009] b. Welding the flywheel end plate: Keep the flywheel end plate on the flywheel welding tool and weld the flywheel end plate to the flywheel hub under constraint;
[0010] When welding the inner weld seams of the flywheel end plate and flywheel hub, first weld eight equal-length first group weld seams at eight symmetrical and evenly spaced positions on the circumference. Then, symmetrically weld the remaining eight second group weld seams, connecting the second group weld seams with the first group weld seams. After welding and cooling, remove the pressure plate on the flywheel assembly and then remove the pressure ring. Lift the flywheel assembly, flip it over, and place it on the flywheel welding tool. Repeat steps a and b to install the heat sleeve and weld the flywheel end plate on the other side of the flywheel assembly.
[0011] c. Rollerizing flywheel end plates: The flywheel assembly with tool mandrel is clamped on a lathe, and the inner weld seams and heat-affected zones on both ends of the flywheel assembly are machined with minimal light exposure.
[0012] Start the lathe and first roll the inner weld and heat-affected zone. Use a 90-degree large radius rolling tool to roll the inner weld and heat-affected zone from the inner diameter to the outer diameter, with an axial feed of 0.013mm. Then roll the outer side of the flywheel end plate. Use a cylindrical rolling tool to press the flywheel end plate above the flywheel retaining ring, with an axial feed to make the flywheel end plate fit against the flywheel retaining ring before rolling. Finally, repeat the rolling of the inner weld, heat-affected zone, and outer side of the flywheel end plate until the flywheel end plate and flywheel retaining ring can fit completely. Keep the flywheel assembly clamped on the lathe and turn the outer diameter of the flywheel assembly. The turning direction should be from the flywheel end plates at both ends of the flywheel assembly towards the flywheel retaining ring.
[0013] d. Install and weld the flywheel housing: Heat the flywheel housing to 100-150℃ using a heat gun and then heat-fit it onto the flywheel assembly. Then machine both ends of the flywheel housing to meet the requirements of the drawings.
[0014] Place the flywheel assembly vertically on the flywheel welding tool with one side facing upwards. Install a copper cooling ring on the outer circumference of the flywheel housing and tighten it with screws. Place the pressure plate on the flywheel end plate above the flywheel retaining ring. Screw the threaded support rod into the threaded hole of the pressure plate and press it against the flywheel welding tool. Screw the fully threaded tie rod through the pressure plate into the threaded hole of the flywheel welding tool. Install the nut onto the fully threaded tie rod and place it against the pressure plate. Finally, tighten the 8 support rods to make the 8 pressure plates evenly press against the flywheel end plate. Begin welding the outer welds of the 8 sections of the flywheel housing and flywheel end plate at the middle position of the 8 pressure plates. After removing the 8 pressure plates, weld the remaining 8 sections of the outer welds of the flywheel housing and flywheel end plate below the pressure plates. Lift the flywheel assembly, flip it over, and place it on the flywheel welding tool. Repeat step d to weld the outer welds of the flywheel housing and flywheel end plate on the other side of the flywheel assembly.
[0015] e. Machining and inspection of flywheel end plate: Support the flywheel hub position, clamp the flywheel assembly on the machine tool and align it, and turn the flywheel end plate from the inside to the outside with a cutting depth of 0.013mm; after turning, use a dial indicator on the lathe to check the end face runout of the flywheel assembly.
[0016] The present invention discloses an installation, welding and processing process for a large shielded motor flywheel end plate. In step b), 1. the arc start position and arc end position of each weld should be ground to reduce the possibility of welding defects; 2. the final inner weld should be flush with the flywheel hub and slightly lower than the adjacent flywheel end plate.
[0017] This invention discloses an installation, welding, and processing process for a large shielded motor flywheel end plate. In step e),
[0018] 1. When turning the flywheel end plate, a sharper diamond-shaped insert can be used and the insert should be perpendicular to the end face of the flywheel end plate.
[0019] 2. When using a dial indicator to check the end face runout of the flywheel assembly, first set the dial indicator to reference A and reference B in sequence, requiring the runout value at reference A and reference B to be within 0.010mm; then set the dial indicator to area C, area D, and area E in sequence. Among them, the allowable runout value in area C should be 0-0.025mm lower than the common reference of reference A and reference B, the allowable runout value in area D should be 0-0.100mm lower than the common reference of reference A and reference B, and the allowable runout value in area E should be 0-0.025mm lower than the common reference of reference A and reference B.
[0020] 3. If the flywheel end plate does not meet the runout requirements when checked with a dial indicator, continue machining the flywheel end plate with a cutting depth of 0.013mm until the runout of the flywheel end plate meets the above runout check requirements when checked with a dial indicator.
[0021] The technical effects of this invention are:
[0022] 1. The flywheel end plate is a thin-walled component. It is heat-fitted onto the flywheel assembly and welded to the flywheel hub. At this point, it's difficult for the flywheel end plate to completely fit against the internal components of the flywheel. Using pressure plates and rings to constrain and limit the flywheel end plate ensures proper installation during heat fitting and also allows welding under constraint, reducing deformation during the welding process. 2. During the welding process, welding at eight evenly spaced and symmetrical positions on the circumference helps reduce deformation of the flywheel end plate during welding. During welding, the weld seam should not be too large. The final weld seam should be flush with the flywheel hub and slightly lower than the adjacent flywheel hub. This reduces the welding heat and helps to reduce welding deformation. It is also required that the arc start and arc end positions of each weld seam be ground to reduce the possibility of welding defects. 4. When machining the outer diameter of the flywheel, the weld seam and heat-affected zone of the flywheel hub and flywheel end plate are rolled first to eliminate the welding stress in the weld seam and heat-affected zone, and avoid deformation of the flywheel end plate during subsequent processing and use. 5. When welding the flywheel shell and flywheel end plate, a pressure plate is used to press the flywheel end plate to weld it to the flywheel shell under a constrained state to reduce the deformation of the flywheel end plate. Meanwhile, the use of a copper cooling ring to absorb welding heat during flywheel shell welding also helps reduce deformation during the welding process; 6. When machining the flywheel end plate, a small cutting amount is used, and a sharper rhomboid insert is used with the insert perpendicular to the workpiece surface to reduce deformation during machining; 7. During the cutting process, the flatness of the combined plane of the hub position (reference A) and the flywheel end plate above the flywheel retaining ring (reference B) is controlled instead of the flatness of the entire flywheel end face, which reduces the machining difficulty of the flywheel end plate and also meets the function of supporting the thrust plate on the motor rotor. This invention reduces the deformation of the flywheel end plate during the welding process between the flywheel end plate and the flywheel hub, and between the flywheel end plate and the flywheel shell by reducing and absorbing welding heat and constraining the flywheel end plate. The use of rolling solves the problem of tight fit between the flywheel end plate and the internal components of the flywheel, reduces the machining difficulty of the flywheel end face and meets the function of supporting the thrust plate on the rotor, thereby ensuring the smooth operation of the motor rotor. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the flywheel end plate heat fitting and welding.
[0024] Figure 2 This is a schematic diagram of flywheel end plate rolling and outer diameter machining.
[0025] Figure 3 This is a schematic diagram of the welding between the flywheel end plate and the flywheel housing.
[0026] Figure 4 This is a schematic diagram of the end face machining of the flywheel assembly component.
[0027] The attached diagram is labeled as follows: 1 is the pressure ring; 2 is the nut; 3 is the pressure plate; 4 is the fully threaded tie rod; 5 is the support rod; 6 is the flywheel welding tool; 7 is the inner weld; 8 is the flywheel assembly assembly; 9 is the tool mandrel; 10 is the flywheel end plate; 11 is the flywheel hub; 12 is the second group of welds; 13 is the first group of welds; 14 is the flywheel retaining ring; 15 is the tungsten ingot; 16 is the outer diameter; 17 is the cylindrical rolling tool; 18 is the heat-affected zone; 19 is the rolling tool; 20 is the outer weld; 21 is the copper cooling ring; 22 is the screw; 23 is the flywheel housing; 24 is reference A; 25 is region C; 26 is region D; 27 is reference B; 28 is region E. Detailed Implementation
[0028] An installation, welding, and processing technology for a large shielded motor flywheel end plate, a. heat-fitted flywheel end plate 10: as shown Figure 1 As shown, after the flywheel end plate 10 is heated to 100-150℃ in the heating furnace, it is hoisted above the flywheel assembly 8 and heat-fitted onto the flywheel assembly 8. The flywheel end plate 10 and the flywheel retaining ring 14 are interference fit, and the flywheel end plate 10 and the flywheel hub 11 are clearance fit. Immediately, the pressure ring 1 is placed on the flywheel end plate 10. First, the pressure plate 3 is placed on the pressure ring 1, then the thread of the support rod 5 is screwed into the threaded hole of the pressure plate 3 and pressed against the flywheel welding tool 6. The fully threaded tie rod 4 is then passed through the pressure plate 3. Screw the flywheel welding tool 6 into the threaded hole, install the nut 2 onto the fully threaded tie rod 4 and rest it against the pressure plate 3, and finally tighten the support rod 5 to press the pressure ring 1 onto the flywheel end plate 10. This can constrain and limit the flywheel end plate 10 after heat fitting, prevent the flywheel end plate 10 from moving during the cooling process, and ensure that the flywheel end plate 10 is completely fitted with the internal components of the flywheel (including the flywheel hub 11, tungsten block 15, and flywheel retaining ring 14). This ensures that it can be installed in place during heat fitting, thereby ensuring the assembly quality of the flywheel end plate 10.
[0029] b. Welding flywheel end plate 10: as follows Figure 1As shown, the flywheel end plate 10 is held on the flywheel welding tool 6 and welded to the flywheel hub 11 under constraint, reducing the deformation of the flywheel end plate 10 during the welding process. When welding the inner weld 7, firstly, weld eight equal-length first group welds 13 (black area) at eight symmetrical and evenly spaced positions on the circumference. Welding at eight evenly spaced and symmetrical positions on the circumference helps control and reduce the deformation of the flywheel end plate 10 during the welding process. Then, symmetrically weld the remaining second group welds 12 (white area). The second group welds 12 should connect the first group welds 13 together. The starting and ending positions of each weld should be ground to reduce the possibility of welding defects. The final inner weld 7 should be flush with the flywheel hub 11 and slightly lower than the adjacent flywheel end plate 10. This reduces the welding heat and also helps reduce welding deformation. After the welding cools down, remove the pressure plate 3 on the flywheel assembly 8 and then remove the pressure ring 1. Lift the flywheel assembly component 8, flip it over and place it on the flywheel welding tool 6, repeat steps a and b, install the heat sleeve and weld the flywheel end plate 10 on the other side of the flywheel assembly component 8;
[0030] c. Rolled flywheel end plate 10: as shown Figure 2 As shown, the flywheel assembly 8 with tool spindle 9 is clamped on a lathe. The inner weld seam 7 and heat-affected zone 18 on both ends of the flywheel assembly 8 are machined to a minimum. The lathe is started, and the inner weld seam 7 and heat-affected zone 18 are rolled first, using a 90-degree large-radius rolling tool 19 to roll the inner weld seam 7 and heat-affected zone 18 from the inner diameter to the outer diameter, with an axial feed of 0.013 mm. Next, the outer side of the flywheel end plate 10 is rolled, using a cylindrical rolling tool 17 to press onto the flywheel end plate 10 above the flywheel retaining ring 14, with an axial feed to bring the flywheel end plate 10 into contact with the flywheel retaining ring 14 before rolling. Finally, the rolling of the inner weld seam 7 and heat-affected zone 18 and the rolling of the outer side of the flywheel end plate 10 are repeated until the flywheel end plate 10 and flywheel retaining ring 10 can be completely fitted together. While the flywheel assembly 8 is clamped on the lathe, the outer diameter 16 of the flywheel assembly 8 is turned. The turning direction should be from the flywheel end plates 10 at both ends of the flywheel assembly 8 towards the flywheel retaining ring 14. When machining the outer diameter 16 of the flywheel assembly 8, the inner weld 7 and heat-affected zone 18 of the flywheel hub 11 and the flywheel end plate 10 are first rolled to ensure a tight fit between the flywheel end plate 10 and the internal components of the flywheel assembly 8. At the same time, the welding stress of the inner weld 7 and the heat-affected zone 18 is eliminated, preventing deformation of the flywheel end plate 10 during subsequent processing and use.
[0031] d. Install and weld the flywheel housing 23: as shown Figure 3As shown, the flywheel housing 23 is heated to 100-150℃ using a heat gun and then heat-fitted onto the flywheel assembly 8. The two ends of the flywheel housing 23 are then machined to the drawing requirements. The flywheel assembly 8 is placed vertically on the flywheel welding tool 6 with one side facing upwards. A copper cooling ring 21 is installed on the outer circumference of the flywheel housing 23 to absorb welding heat and is tightened and fixed with screws 22. First, the pressure plate 3 is placed on the flywheel end plate 10 above the flywheel retaining ring 14. Then, the thread of the support rod 5 is screwed into the threaded hole of the pressure plate 3 and pressed against the flywheel welding tool 6. The fully threaded tie rod 4 is passed through the pressure plate 3 and screwed into the threaded hole of the flywheel welding tool 6. The nut 2 is installed on the fully threaded tie rod 4 and rests against the pressure plate 3. Finally, by tightening the eight support rods 5, the eight pressure plates 3 are evenly distributed around the circumference and pressed onto the flywheel end plate 10 above the flywheel retaining ring 14. Welding begins at the middle position of the 8 pressure plates 3, with the outer weld (20) between the 8 sections of flywheel housing 23 and flywheel end plate 10. The 8 pressure plates 3 are then removed, and the remaining outer weld 20 below the pressure plates 3 is finally welded. The flywheel assembly 8 is lifted, flipped over, and placed on the flywheel welding tool 6. Step d is repeated to weld the outer weld 20 between the flywheel housing 23 and flywheel end plate 10 on the other side of the flywheel assembly 8. Similarly, the pressure plates 3 are used to press down on the flywheel end plate 10 to weld it to the flywheel housing 23 under constraint, reducing the deformation of the flywheel end plate 10.
[0032] e. Machining and inspection of flywheel end plate 10: (e.g.) Figure 4 As shown, the flywheel assembly 8 is clamped onto the machine tool and aligned at the position of the supporting flywheel hub 11. A sharp, diamond-shaped cutting tool, perpendicular to the end face of the flywheel end plate 10, is used. The flywheel end plate 10 is machined from the inside out with a small cutting allowance of 0.013mm to minimize deformation during machining. After machining, the end face runout of the flywheel assembly 8 is checked on the lathe using a dial indicator. Figure 4 As shown, first, set the dial indicator to the left of reference A 24 (the circular area to the left of the weld between the flywheel hub 11 and the flywheel end plate, i.e.) Figure 4 The horizontal line indicated by reference numeral 24) and reference B 27 (the annular area of the flywheel end plate 10 above the flywheel retaining ring 14, i.e. Figure 4 The horizontal line indicated by reference number 27 requires that the runout value between reference A 24 and reference B 27 be within 0.010mm. Then, the dial indicator should be sequentially positioned in area C25 (the innermost circular area on the upper part of the flywheel hub 11, i.e....). Figure 4 The horizontal line indicated by number 25), area D26 (the circular area of the flywheel end plate 10 above the tungsten ingot 15, i.e. Figure 4 The horizontal line indicated by the number 26), area E 28 (the outermost circular area of the flywheel end plate 10, i.e. Figure 4(The horizontal line indicated by reference number 28). Among them, the allowable area C 25 should be lower than the common reference of reference A 24 and reference B 27 by 0-0.025mm, the allowable area D 26 should be lower than the common reference of reference A 24 and reference B 27 by 0-0.100mm, and the allowable area E 28 should be lower than the common reference of reference A 25 and reference B 27 by 0-0.025mm. If the flywheel end plate 10 does not meet the runout requirements when checked with a dial indicator, the flywheel end plate 10 is machined with a cutting depth of 0.013mm until the runout of the flywheel end plate 10 meets the above runout check requirements when checked with a dial indicator. During the cutting process, the flatness of the combined plane of the hub position (reference A) and the flywheel end plate 10 above the flywheel retaining ring 14 (reference B) is controlled instead of the flatness of the entire flywheel end face. This reduces the machining difficulty of the flywheel end plate 10 and also meets the function of supporting the thrust plate on the motor rotor.
[0033] The above description is merely a preferred embodiment of the present invention. These specific embodiments are different implementations based on the overall concept of the present invention, and the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A process for the installation, welding, and processing of a large shielded motor flywheel end plate, characterized in that, Includes the following steps: a. Heat-fitting flywheel end plate (10): First, place the flywheel assembly assembly (8) with one side facing upwards on the flywheel welding tool (6), then place a flywheel end plate (10) in the heating furnace and heat it to 100-150℃. Then, lift the flywheel end plate (10) above the flywheel assembly assembly (8) and heat-fit it onto the flywheel assembly assembly (8). The flywheel end plate (10) and the flywheel retaining ring (14) in the flywheel assembly (8) are interference-fitted, and the flywheel end plate (10) and the flywheel hub (11) in the flywheel assembly (8) are clearance-fitted. Immediately, the pressure ring (1) is placed on the flywheel end plate (10); the pressure plate (3) is placed on the pressure ring (1), and the thread of the support rod (5) is screwed into the threaded hole of the pressure plate (3) and pressed against the flywheel welding tool (6). The fully threaded tie rod (4) is passed through the pressure plate (3) and screwed into the threaded hole of the flywheel welding tool (6). The nut (2) is installed on the fully threaded tie rod (4) and rests on the pressure plate (3). Finally, the pressure ring (1) is pressed onto the flywheel end plate (10) by tightening the support rod (5). b. Welding the flywheel end plate (10): Keep the flywheel end plate (10) on the flywheel welding tool (6) and weld the flywheel end plate (10) to the flywheel hub (11) under constraint. When welding the inner weld (7) of the flywheel end plate (10) and the flywheel hub (11), firstly weld 8 equal-length first group welds (13) at 8 symmetrical and evenly spaced positions on the circumference, and then symmetrically weld the remaining 8 second group welds (12). The second group welds (12) and the first group welds (13) are connected together. After the welding cools down, remove the pressure plate (3) on the flywheel assembly (8) and then remove the pressure ring (1). Lift the flywheel assembly assembly (8), flip it over and place it on the flywheel welding tool (6), repeat steps a and b, install the heat sleeve and weld the flywheel end plate (10) on the other side of the flywheel assembly assembly (8); c. Rolling flywheel end plate (10): The flywheel assembly (8) with tool mandrel (9) is clamped on a lathe and the inner weld (7) and heat-affected zone (18) on both ends of the flywheel assembly (8) are machined with minimal light exposure. Start the lathe and first roll the inner weld (7) and heat-affected zone (18), that is, use a 90-degree large radius rolling tool (19) to roll the inner weld (7) and heat-affected zone (18) from the inner diameter to the outer diameter, with an axial feed of 0.013 mm; then roll the outer side of the flywheel end plate (10), that is, use a cylindrical rolling tool (17) to press the flywheel end plate (10) above the flywheel retaining ring (14), with an axial feed to make the flywheel end plate (10) and the flywheel retaining ring (14) fit together. 4) After bonding, roll forming is performed; finally, roll forming is repeated on the inner weld (7), heat-affected zone (18) and outer side of flywheel end plate (10) until the flywheel end plate (10) and flywheel retaining ring (14) can be completely bonded; keep the flywheel assembly (8) clamped on the lathe and turn the outer diameter (16) of the flywheel assembly (8). The turning direction should be from the flywheel end plate (10) at both ends of the flywheel assembly (8) towards the flywheel retaining ring (14); d. Install and weld the flywheel housing (23): Heat the flywheel housing (23) to 100-150℃ using a heat gun and then heat-fit it onto the flywheel assembly (8). Then process both ends of the flywheel housing (23) to meet the requirements of the drawing. Place the flywheel assembly (8) vertically on the flywheel welding tool (6) with one side facing upwards. Install a copper cooling ring (21) on the outer circumference of the flywheel housing (23) and tighten it with screws (22). Place the pressure plate (3) on the flywheel end plate (10) above the flywheel retaining ring (14). Screw the thread of the support rod (5) into the threaded hole of the pressure plate (3) and press it against the flywheel welding tool (6). Screw the fully threaded tie rod (4) through the pressure plate (3) into the thread of the flywheel welding tool (6). Inside the hole, install the nut (2) onto the fully threaded tie rod (4) and rest it against the pressure plate (3). Finally, by tightening the support rods (5), the eight pressure plates (3) are evenly distributed around the flywheel end plate (10). Weld the outer weld (20) of the eight flywheel housing (23) and the flywheel end plate (10) at the middle position of the eight pressure plates (3). After removing the eight pressure plates (3), finally weld the remaining eight outer welds (20) of the flywheel housing (23) and the flywheel end plate (10) below the pressure plate (3). Lift the flywheel assembly assembly (8), flip it over and place it on the flywheel welding tool (6), repeat step d, and weld the outer weld (20) between the flywheel housing (23) and the flywheel end plate (10) on the other side of the flywheel assembly assembly (8); e. Machining and inspection of flywheel end plate (10): With the flywheel hub (11) in position, clamp the flywheel assembly (8) on the machine tool and align it. Turn the flywheel end plate (10) from the inside out with a cutting depth of 0.013mm. After turning, use a dial indicator on the lathe to check the end face runout of the flywheel assembly (8).
2. The installation, welding, and processing technology of the large shielded motor flywheel end plate according to claim 1, characterized in that: In step b), 1. The starting and ending positions of each weld segment should be ground to reduce the possibility of welding defects; 2. The final inner weld (7) should be flush with the flywheel hub (11) and slightly lower than the adjacent flywheel end plate (10).
3. The installation, welding, and processing technology of the large shielded motor flywheel end plate according to claim 1, characterized in that: In step e), 1. When turning the flywheel end plate (10), a sharper diamond-shaped insert can be used and the insert should be perpendicular to the end face of the flywheel end plate (10) for turning; 2. When using a dial indicator to check the end face runout of the flywheel assembly (8), first indicate the dial indicator to reference A (24) and reference B (27) in sequence, requiring the runout value of reference A (24) and reference B (27) to be within 0.010mm; then indicate the dial indicator to area C (25), area D (26) and area E (28) in sequence, where the allowable area C (25) should be lower than the common reference of reference A (24) and reference B (27) by 0-0.025mm, the allowable area D (26) runout value should be lower than the common reference of reference A (24) and reference B (27) by 0-0.100mm, and the allowable area E (28) runout value should be lower than the common reference of reference A (24) and reference B (27) by 0-0.025mm; 3. If the flywheel end plate (10) does not meet the runout requirements when checked with a dial indicator, continue to process the flywheel end plate (10) with a cutting depth of 0.013mm until the runout of the end face of the flywheel end plate (10) meets the above runout check requirements when checked with a dial indicator.