Milling clamp for steam turbine cylinder hold-down ring

Abstract

The invention belongs to the technical field of milling fixtures, and particularly relates to a milling fixture for a steam turbine cylinder hold-down ring, which comprises a splicing table mounted on a milling machine table, and a splicing mechanism is rotatably mounted on the splicing table; and the splicing machining mechanism is used for installing and splicing the pressing arc sections and guiding the pressing arc sections to be switched. Through the arrangement of the splicing machining mechanism, on one hand, the pressing arc sections have a plurality of installation positions, and in the whole machining process, the multiple installation positions are arranged, so that milling machining and installation positioning of the pressing arc sections can be conducted at the same time; on the other hand, in the one-by-one machining process of the pressing arc sections, along with the fact that the connecting rods enter the switching grooves one by one, the multiple pressing arc sections are gradually spliced to form the annular pressing ring, and the machining efficiency of the pressing ring is improved. And a worker can conveniently observe the assembling details of the two adjacent pressing arc sections at any time, and convenience is provided for milling of the pressing arc sections.

Description

Technical Field

[0001] This invention belongs to the field of milling fixture technology, specifically a milling fixture for a steam turbine cylinder clamping ring. Background Technology

[0002] A turbine cylinder clamping ring is a ring-shaped fastening component installed at the mating surface of a turbine cylinder to tighten the cylinder sealing gasket and ensure that high-pressure steam inside the cylinder does not leak out. It typically surrounds the edge area of ​​the cylinder flange and uses evenly distributed bolt holes and high-strength fastening bolts to achieve tight pressure on the cylinder mating surface.

[0003] In conventional technology, the lower end face of the cylinder clamping ring is a flat surface, while the upper end face is an irregularly shaped surface. The inner edge of the upper end face has a boss with multiple circumferentially evenly arranged through holes, and the outer edge of the upper end face has a semi-circular shoulder. The entire clamping ring consists of twelve clamping arc segments, each with an included angle of approximately 30°. In the conventional production process, the clamping arc segments are usually first cut into four initial arc segments, then welded together to form a semi-circular arc segment, and finally milled on the semi-circular arc segment. After wire cutting and precision machining, the twelve clamping arc segments are formed. Because the initial arc segments have a large curvature in this production process, excessive excess material will be generated during the cutting of the sheet metal. Furthermore, during subsequent milling, due to the large diameter of the semi-circular arc segment, unnecessary deformation of the semi-circular arc segment can easily occur if the support effect is not ideal, ultimately affecting the accuracy of the manufactured clamping arc segments.

[0004] In order to improve the shortcomings of the above-mentioned process, a milling fixture and a processing method for a large steam turbine cylinder clamping ring were disclosed in related technologies, with application number CN201010609382X. In this scheme, the clamping ring is divided into clamping ring arc segments with uniform specifications and appropriate size for processing. The outer dimensions of the clamping ring arc segments are processed by milling, which has a much higher processing efficiency than turning. However, in actual application, it was found that because the clamping ring is directly subdivided into clamping arc segments for processing, not only do the twelve clamping arc segments need to be milled separately, but the clamping arc segments also need to be frequently flipped and switched during processing. Therefore, the processing flow is prolonged, resulting in low processing efficiency.

[0005] In view of this, the present invention proposes a milling fixture for a steam turbine cylinder clamping ring to solve the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the above-mentioned technical problems, this invention proposes a milling fixture for a steam turbine cylinder clamping ring.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a milling fixture for a steam turbine cylinder clamping ring, comprising a splicing table mounted on a milling machine worktable, wherein a splicing processing mechanism is rotatably mounted on the splicing table;

[0008] The splicing and processing mechanism is used to install the splicing and pressing arc segment and guide the switching of the pressing arc segment. The splicing and processing mechanism includes a mounting base, a connecting rod and a clamping plate.

[0009] The mounting base is fixedly installed on the splicing platform, and the mounting base has a ring-shaped switching groove.

[0010] A separator ring is rotatably installed in the switching slot, and the separator ring has evenly distributed positioning slots. One end of the connecting rod extends into the positioning slot.

[0011] A clamping plate is fixedly installed at the end of the connecting rod away from the separating ring, and a positioning post is fixedly installed on the clamping plate. The pressing arc segment is installed on the positioning post.

[0012] Preferably, the mounting base has a T-shaped lifting groove on the side away from the milling machine table. The lifting groove is connected to the switching groove. In the initial state, the connecting rods are arranged at equal intervals in the lifting groove.

[0013] Preferably, it also includes an automatic processing mechanism, which includes a lifting rod and a driving component;

[0014] A lifting rod is fixedly installed at the bottom of the lifting trough; the lifting rod is a hydraulic telescopic rod.

[0015] The drive component is mounted on the top of the mounting base, extends through and into the switching slot, the top of the separator ring has a toothed ring design, the drive component is engaged with the separator ring, and the drive component is externally connected to a drive motor.

[0016] Preferably, the automatic processing mechanism further includes a screw and a piston plate;

[0017] The mounting base is provided with a hydraulic chamber, and a screw is rotatably installed in the hydraulic chamber;

[0018] A piston plate is slidably installed inside the hydraulic chamber. The piston plate is driven by a screw. The hydraulic chamber is connected to the lifting rod through a pipe.

[0019] Preferably, the top end of the screw is connected to the output end of the drive motor via a bevel gear set.

[0020] Preferably, the automatic processing mechanism further includes a flipping component and a replacement rod;

[0021] The mounting base is provided with a rotating groove, and a flipping component is rotatably installed in the rotating groove. Both ends of the flipping component are equipped with strong magnets.

[0022] The replacement rod and the connecting rod have the same structure. The replacement rod is located at the top of the flipping part, and the switching groove passes through the bottom of the rotating groove. When the connecting rod enters the rotating groove, the connecting rod and the replacement rod are symmetrically distributed at the top and bottom of the flipping part.

[0023] Preferably, the flipping component has telescopic grooves at both the top and bottom, and each telescopic groove has a spring-loaded insert block installed in it. The powerful magnets are embedded in the insert blocks, and the replacement rod and connecting rod each have slots.

[0024] Preferably, the mounting base has a transmission groove, a transmission gear is rotatably mounted in the transmission groove, the flipping member extends into the transmission groove and is fixedly connected to the transmission gear, the driving member is formed by two incomplete gears spliced ​​together in a staggered manner, and the driving member is periodically meshed and connected to the partition ring and the transmission gear.

[0025] Preferably, at any given time, the drive component is only engaged with one of the separator ring and the transmission gear.

[0026] Preferably, the splicing platform, connecting rod, and replacement rod are all controllable telescopic structures.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. The milling fixture for a turbine cylinder clamping ring described in this invention, with its splicing processing mechanism, allows the clamping arc segment to have multiple installation positions. This allows for simultaneous milling and installation positioning of the clamping arc segment throughout the entire processing, saving significant loading and unloading time and thus improving the processing efficiency of the clamping ring. Furthermore, as the clamping arc segment is processed one by one, the connecting rods gradually enter the switching groove, causing multiple clamping arc segments to be gradually spliced ​​together to form a circular clamping ring. This facilitates the worker's observation of the assembly details of adjacent clamping arc segments, providing convenience for the milling process of the clamping arc segment.

[0029] 2. The milling fixture for a turbine cylinder clamping ring described in this invention, by setting up an automatic machining mechanism, provides power through an intermittently starting drive motor during the milling process of the clamping arc segment. In conjunction with components such as a lifting rod and a flipping component, the connecting rod, during its forward rotation, not only enters the milling machine table one by one for milling, but also flips the clamping arc segment one by one during multiple rotations, ultimately completing the multi-faceted machining of the clamping arc segment. Throughout the entire machining process, the operator only needs to install and disassemble the clamping arc segment, thus effectively reducing the labor intensity of the operator. Furthermore, since installation, disassembly, and milling can be performed simultaneously, the impact of clamping arc segment loading and unloading time on machining efficiency is effectively reduced. Attached Figure Description

[0030] The invention will now be further described with reference to the accompanying drawings.

[0031] Figure 1 This is a perspective view of the working state of the present invention;

[0032] Figure 2 This is a perspective view of the invention in its folded state.

[0033] Figure 3 It is an assembly 3D diagram of the splicing processing mechanism and the automatic processing mechanism;

[0034] Figure 4 This is a diagram of the internal structure of the mounting base;

[0035] Figure 5 It is an assembly 3D view of the drive motor, drive components, separator ring, and transmission gears;

[0036] Figure 6 It is a 3D assembly diagram of the drive motor, drive components, and bevel gear set;

[0037] Figure 7 It is a 3D assembly view of the flipper, replacement rod, and connecting rod;

[0038] Figure 8 This is a sectional view of the mounting base;

[0039] In the diagram: 1. Milling machine worktable; 2. Assembly table; 21. Mounting base; 22. Switching slot; 23. Separator ring; 24. Positioning slot; 25. Clamping plate; 26. Positioning column; 27. Lifting slot; 28. Lifting rod; 29. ​​Driving component; 3. Drive motor; 31. Screw; 32. Hydraulic chamber; 33. Piston plate; 34. Bevel gear set; 4. Flipping component; 41. Rotating slot; 42. Replacement rod; 43. Telescopic slot; 44. Insert block; 45. Slot; 5. Transmission slot; 51. Transmission gear; 6. Connecting rod. Detailed Implementation

[0040] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0041] like Figures 1 to 8 As shown, the milling fixture for a steam turbine cylinder clamping ring of the present invention includes a splicing table 2 mounted on a milling machine worktable 1, and a splicing processing mechanism is rotatably mounted on the splicing table 2;

[0042] The splicing and processing mechanism is used to install the splicing and pressing arc segment and guide the switching of the pressing arc segment. The splicing and processing mechanism includes a mounting base 21, a connecting rod 6 and a clamping plate 25.

[0043] The mounting base 21 is fixedly installed on the splicing platform 2, and the mounting base 21 is provided with a ring-shaped switching groove 22;

[0044] A partition ring 23 is rotatably installed in the switching groove 22. The partition ring 23 has evenly distributed positioning grooves 24. One end of the connecting rod 6 extends into the positioning groove 24.

[0045] A clamping plate 25 is fixedly installed on the end of the connecting rod 6 away from the separating ring 23. A positioning post 26 is fixedly installed on the clamping plate 25. The pressing arc segment is installed on the positioning post 26. The positioning post 26 and the clamping plate 25 are detachably fixedly connected to each other to adapt to spiral holes of different diameters.

[0046] The mounting base 21 has a T-shaped lifting groove 27 on the side away from the milling machine worktable 1. The lifting groove 27 is connected to the switching groove 22. In the initial state, the connecting rods 6 are arranged at equal intervals in the lifting groove 27.

[0047] In the production process of the cylinder clamping ring, twelve clamping arc segments need to be cut out from the steel plate first. Then, bolt holes are made on each clamping arc segment. Finally, the clamping arc segments are installed on the clamping plate 25 one by one through the bolt holes, and milled on the milling machine worktable 1 one by one under the guidance of the splicing processing mechanism.

[0048] Specifically, during the installation of the pressing arc segment, the worker first installs one of the pressing arc segments onto the top clamping plate 25, and then manually pushes the connecting rod 6, causing the connecting rod 6, which is initially stacked and stored in the lifting groove 27, to rise and then enter the switching groove 22 and the positioning groove 24. Then, during the circumferential rotation, the separating ring 23 is pushed to move. As the pressing arc segments are installed onto the clamping plate 25 one by one and the connecting rod 6 enters the positioning groove 24 one by one, the multiple pressing arc segments, supported by the connecting rod 6, eventually form a circular structure around the mounting base 21. One segment of the pressing arc segment that forms the circular pressing ring is located on the milling machine worktable 1, and the pressing arc segment is processed by the milling cutter on the milling machine. With the controllable rotation of multiple connecting rods 6 in the switching groove 22, the processing of the pressing arc segments is completed one by one. During the processing, since the pressing ring composed of the pressing arc segments always remains circular, the worker can observe the overall size of the pressing ring composed of the pressing arc segments at any time during the processing.

[0049] Compared to processing each clamping arc segment individually and then assembling them after all processing is complete, the splicing processing mechanism in this invention allows for multiple installation positions for the clamping arc segments. This multiple installation positions enable simultaneous milling and installation positioning of the clamping arc segments, saving significant loading and unloading time and improving the processing efficiency of the clamping ring. Furthermore, as the clamping arc segments are processed one by one, the connecting rods 6 enter the switching groove 22 one by one, gradually splicing multiple clamping arc segments to form a circular clamping ring. This allows workers to easily observe the assembly details of adjacent clamping arc segments, facilitating the milling process of the clamping arc segments.

[0050] As a preferred embodiment of the present invention, it further includes an automatic processing mechanism, which includes a lifting rod 28 and a driving member 29;

[0051] A lifting rod 28 is fixedly installed at the bottom of the lifting trough 27. The lifting rod 28 is a hydraulic telescopic rod.

[0052] The drive component 29 is mounted on the top of the mounting base 21. The drive component 29 extends through and into the switching groove 22. The top of the separator ring 23 has a toothed ring design. The drive component 29 is engaged with the separator ring 23. The drive component 29 is externally connected to the drive motor 3.

[0053] The automatic processing mechanism also includes a screw 31 and a piston plate 33;

[0054] The mounting base 21 has a hydraulic chamber 32, and a screw 31 is rotatably mounted in the hydraulic chamber 32;

[0055] A piston plate 33 is slidably installed in the hydraulic chamber 32. The piston plate 33 is helically driven by the screw 31. The hydraulic chamber 32 is connected to the lifting rod 28 through a pipe.

[0056] The top end of the screw 31 is connected to the output end of the drive motor 3 via a bevel gear set 34.

[0057] To further enhance the convenience of milling the clamping arc segment, an automatic processing mechanism is also provided in this invention. In practical application, after the operator installs the clamping arc segment on the top clamping plate 25, the drive motor 3 is started through a pre-set program. When the output end of the drive motor 3 rotates, it drives the drive component 29 and the screw 31 to rotate. As the drive component 29 rotates, it pushes the partition ring 23 to rotate. The partition ring 23 is connected to the connecting rod 6 through the positioning groove 24 and the switching groove 22. Therefore, the rotation of the partition ring 23 directly pushes the top connecting rod 6 to move. At the same time, the rotation of the screw 31 causes the piston plate 33 to descend, and the hydraulic oil in the hydraulic chamber 32 is squeezed into the lifting rod 28. The lifting rod 28 extends from the bottom of the stacked connecting rods 6, thereby forcing the stacked connecting rods 6 to enter the switching groove 22 one by one. Under the action of the positioning groove 24 on the partition ring 23, the connecting rods 6 are finally moved. The segments are distributed one by one to the circumference of the mounting base 21. During this process, the workers install the clamping arc segments one by one onto the clamping plate 25, and the rotating connecting rod 6 transports them to the milling machine table 1. It should be noted that during this process, the clamping arc segments on the milling machine table 1 need to be milled. Therefore, the drive motor 3 starts periodically, and the start-stop cycle of the drive motor 3 is related to the time required for the clamping arc segment to rotate 30 degrees and the milling time of the clamping arc segment. After all the clamping arc segments have been processed, the drive motor 3 is controlled by the pre-set program to rotate in the opposite direction. Under the transmission action of the drive component 29, the bevel gear set 34, and the screw 31, the piston plate 33 rises and the lifting rod 28 falls. Therefore, when the connecting rod 6 moves to the top of the lifting groove 27, under the action of gravity, the connecting rod 6 falls into the lifting groove 27, and finally the connecting rod 6 is stored in the lifting groove 27 again for the next use.

[0058] In a preferred embodiment of the present invention, the automatic processing mechanism further includes a flipping component 4 and a replacement rod 42;

[0059] The mounting base 21 is provided with a rotating groove 41, and a flipping component 4 is rotatably installed in the rotating groove 41. Both the upper and lower ends of the flipping component 4 are equipped with strong magnets.

[0060] The replacement rod 42 has the same structure as the connecting rod 6. The replacement rod 42 is located at the top of the flipping part 4. The switching groove 22 passes through the bottom of the rotating groove 41. When the connecting rod 6 enters the rotating groove 41, the connecting rod 6 and the replacement rod 42 are symmetrically distributed at the upper and lower ends of the flipping part 4.

[0061] The flipping component 4 has telescopic grooves 43 at both its upper and lower ends. Insert blocks 44 are elastically installed within each telescopic groove 43 via springs. Powerful magnets are embedded within each insert block 44. Slots 45 are provided on both the replacement rod 42 and the connecting rod 6. In this invention, both sides of the insert block 44 are inclined surfaces. When the separating ring 23 pushes the connecting rod 6, the inclined surfaces push the insert block 44 to retract into the telescopic groove 43. The positioning groove 24's cross-section matches the rotating groove 41. Therefore, when the flipping component 4 pushes the insert block 44 to move... When the strong magnet is used, the connecting rod 6 and the replacement rod 42 will be forced to exchange positions. In other embodiments of the present invention, in order to further change the difficulty of the insert 44 retracting into the telescopic groove 43 in both cases, the contact surface between the two when the telescopic groove 43 rotates and pushes the insert 44 can be set as a rough surface or a toothed surface. Therefore, when the flipping member 4 pushes the insert 44, there is a strong static friction between the insert 44 and the telescopic groove 43, which makes it more difficult for the insert 44 to retract into the telescopic groove 43.

[0062] The mounting base 21 has a transmission groove 5, and a transmission gear 51 is rotatably installed in the transmission groove 5. The flipping member 4 extends into the transmission groove 5 and is fixedly connected to the transmission gear 51. The driving member 29 is formed by two incomplete gears spliced ​​together in a staggered manner. The driving member 29 is periodically meshed and connected to the separating ring 23 and the transmission gear 51.

[0063] At any given time, the drive component 29 is only engaged with one of the separating ring 23 and the transmission gear 51.

[0064] To further enhance the convenience of processing the clamping arc segment and reduce the labor intensity of workers during the processing, in this invention, as the drive motor 3 rotates, the drive component 29 rotates. Since the drive component 29 is composed of two incomplete gears spliced ​​together in a staggered manner, one incomplete gear periodically meshes with the separator ring 23, and the other incomplete gear periodically meshes with the transmission gear 51. Furthermore, the drive component 29 only meshes with one of the separator ring 23 or the transmission gear 51 at any given time. Therefore, when the drive component 29 operates, it will alternately drive the separator ring 23 and the transmission gear 51 to rotate. When the separator ring 23 rotates, it pushes the connecting rod 6 to move sequentially onto the milling machine table 1 to process the clamping arc segment on the clamping plate 25. When the transmission gear 51 rotates, it drives the flipping component 4 to rotate. When the connecting rod 6 carries the milling machine... After the machined clamping arc segment moves into the rotating groove 41, when the flipping part 4 rotates, it will drive the replacement rod 42 and connecting rod 6 located at the upper and lower ends of the flipping part 4 to rotate 180 degrees through the insert block 44 and the strong magnet. During the rotation of the replacement rod 42 and the connecting rod 6, the clamping arc segment positioned by the positioning pin 26 will flip and fall under the action of gravity. It should be noted that in this invention, the connecting rod 6 and the replacement rod 42 are exactly the same. When the connecting rod 6 moves to the upper end of the flipping part 4, it becomes the replacement rod 42. When the replacement rod 42 rotates to the lower end of the flipping part 4, it becomes the connecting rod 6. During the change of position of the connecting rod 6 and the replacement rod 42, the clamping arc segment can be flipped. With the operation of the drive motor 3, the finally flipped clamping arc segment is transported to the milling machine worktable 1 again so that the multi-faceted processing of the clamping arc segment can be achieved through two processing steps.

[0065] It should be noted that when the drive motor 3 moves in the reverse direction, as the connecting rods 6 move one by one into the lifting groove 27, during the rotation of the flipping part 4, the replacement rod 42 eventually enters the positioning groove 24 and is also stored in the lifting groove 27 under the push of the separating ring 23. When used again, the top connecting rod 6 is set as the replacement rod 42 and enters the positioning groove 24 in an unloaded state. During the subsequent rotation, it eventually enters the rotating groove 41 to cooperate with the subsequent connecting rods 6 to perform the flipping operation on the pressing arc segment.

[0066] This invention, by setting up an automatic processing mechanism, provides power to the intermittently starting drive motor 3 during the milling process of the clamping arc segment. In conjunction with components such as the lifting rod 28 and the flipping component 4, the connecting rod 6 can not only enter the milling machine table 1 one by one for milling during the forward rotation, but also flip the clamping arc segment one by one during multiple rotations, thus completing the multi-faceted processing of the clamping arc segment. During the entire processing, the operator only needs to install and disassemble the clamping arc segment, thus effectively reducing the labor intensity of the operator. At the same time, since the installation and disassembly operations can be carried out simultaneously with the milling process, the impact of the clamping arc segment loading and unloading time on the processing efficiency is effectively reduced.

[0067] The splicing platform 2, connecting rod 6, and replacement rod 42 are all controllable telescopic structures. The controllable telescopic design allows for manual adjustment of the distance between the splicing platform 2 and the milling machine worktable 1, as well as the length of the connecting rod 6 and replacement rod 42, when producing clamping rings of different diameters, thereby adapting them to clamping rings of different diameters.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A milling fixture for a steam turbine cylinder clamping ring, characterized in that: It includes a splicing table (2) installed on the milling machine worktable (1), and a splicing processing mechanism is rotatably installed on the splicing table (2); The splicing processing mechanism is used to install splicing and pressing arc segments and guide the switching of pressing arc segments. The splicing processing mechanism includes a mounting base (21), a connecting rod (6), and a clamping plate (25). The mounting base (21) is fixedly installed on the splicing platform (2), and the mounting base (21) is provided with a ring-shaped switching groove (22). A partition ring (23) is rotatably installed in the switching groove (22). The partition ring (23) has evenly distributed positioning grooves (24). One end of the connecting rod (6) extends into the positioning groove (24). A clamping plate (25) is fixedly installed on the end of the connecting rod (6) away from the separating ring (23), and a positioning post (26) is fixedly installed on the clamping plate (25). The pressing arc segment is installed on the positioning post (26).

2. The milling fixture for a turbine cylinder clamping ring according to claim 1, characterized in that: The mounting base (21) has a T-shaped lifting groove (27) on the side away from the milling machine table (1). The lifting groove (27) is connected to the switching groove (22). In the initial state, the connecting rods (6) are arranged at equal intervals in the lifting groove (27).

3. The milling fixture for a steam turbine cylinder clamping ring according to claim 2, characterized in that: It also includes an automatic processing mechanism, which includes a lifting rod (28) and a drive component (29). A lifting rod (28) is fixedly installed at the bottom of the lifting trough (27), and the lifting rod (28) is a hydraulic telescopic rod; The drive unit (29) is mounted on the top of the mounting base (21). The drive unit (29) extends through and into the switching groove (22). The top of the separator ring (23) is designed with a toothed ring. The drive unit (29) is meshed with the separator ring (23). The drive unit (29) is externally connected to the drive motor (3).

4. The milling fixture for a turbine cylinder clamping ring according to claim 3, characterized in that: The automatic processing mechanism also includes a screw (31) and a piston plate (33). A hydraulic chamber (32) is provided on the mounting base (21), and a screw (31) is rotatably installed in the hydraulic chamber (32). A piston plate (33) is slidably installed in the hydraulic chamber (32). The piston plate (33) is helically driven by the screw (31). The hydraulic chamber (32) is connected to the lifting rod (28) through a pipe.

5. The milling fixture for a steam turbine cylinder clamping ring according to claim 4, characterized in that: The top end of the screw (31) is connected to the output end of the drive motor (3) via a bevel gear set (34).

6. The milling fixture for a steam turbine cylinder clamping ring according to claim 5, characterized in that: The automatic processing mechanism also includes a flipping component (4) and a replacement rod (42). The mounting base (21) is provided with a rotating groove (41), and a flipping component (4) is rotatably installed in the rotating groove (41). Both the upper and lower ends of the flipping component (4) are equipped with strong magnets. The replacement rod (42) has the same structure as the connecting rod (6). The replacement rod (42) is located at the top of the flipping part (4). The switching groove (22) passes through the bottom of the rotating groove (41). When the connecting rod (6) enters the rotating groove (41), the connecting rod (6) and the replacement rod (42) are symmetrically distributed at the top and bottom ends of the flipping part (4).

7. A milling fixture for a turbine cylinder clamping ring according to claim 6, characterized in that: The flipping component (4) has telescopic grooves (43) at both the top and bottom. Inserts (44) are installed in the telescopic grooves (43) by spring elasticity. The powerful magnets are embedded in the inserts (44). Slots (45) are provided on the replacement rod (42) and the connecting rod (6).

8. A milling fixture for a turbine cylinder clamping ring according to claim 7, characterized in that: The mounting base (21) has a transmission groove (5), and a transmission gear (51) is rotatably installed in the transmission groove (5). The flipping part (4) extends into the transmission groove (5) and is fixedly connected to the transmission gear (51). The driving part (29) is formed by two incomplete gears spliced ​​together in a staggered manner. The driving part (29) is periodically meshed with the partition ring (23) and the transmission gear (51) for transmission.

9. A milling fixture for a turbine cylinder clamping ring according to claim 8, characterized in that: At any given time, the drive unit (29) is engaged with only one of the separator ring (23) and the transmission gear (51).

10. A milling fixture for a turbine cylinder clamping ring according to claim 6 or 9, characterized in that: The splicing platform (2), connecting rod (6), and replacement rod (42) are all controllable telescopic structures.

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