Device and method for machining and fixing a rotor disk sealing plate

Abstract

The invention discloses a device for machining and fixing a rotor disk sealing plate, comprising a main tool (1) and an auxiliary tool (2) matched with the sealing plate, wherein the main tool is provided with a tool through hole (1a), a positioning hole (1b), an equal-dividing hole (1c) and a fan-shaped process hole (1d), wherein the equal-dividing holes (1c) are sequentially arranged as 1#, 2#, 3#, ... 24# in a clockwise direction; the auxiliary tool (2) is divided into first, second, third and fourth filling cores, wherein the first filling core (21) corresponds to the 1# and 9# equal-dividing holes, the second filling core (22) corresponds to the 4# and 18# equal-dividing holes, the third filling core (23) corresponds to the 2#, 3#, 6# to 8#, 11# to 15#, 17#, 20#, 22# to 24# equal-dividing holes, and the fourth filling core (24) corresponds to the 5#, 10# and 16# equal-dividing holes. The invention has the advantages of being able to effectively fix the sealing plate, avoiding deformation of the workpiece during machining, and improving the dimensional accuracy and flatness of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor disk sealing plate machining tooling, and in particular to a device and method for machining and fixing a rotor disk sealing plate. Background Art

[0002] The rotor disc sealing plate is one of the most important core components of the imported rotary valve. It rotates continuously in the equipment while ensuring the sealing performance, and has very high requirements for flatness. At the same time, due to its special material, it will deform with a slight temperature change, and it is difficult to ensure the accuracy and flatness of the sealing plate during the manufacturing process. At present, the technology commonly used internationally is the overall processing method, but due to the limitation of domestic machine tool accuracy, the dimensional accuracy and flatness of the sealing plate processed by the same process cannot meet the requirements of import substitution. Summary of the invention

[0003] The purpose of the present invention is to solve the problems that the existing sealing plate processing is prone to workpiece deformation and the precision and flatness are difficult to control. A device for processing and fixing the rotor disc sealing plate is provided, which can fix the sealing plate during the sealing plate manufacturing process, avoid deformation of the workpiece during the processing, improve the product dimensional accuracy and flatness, and realize the localization of the imported rotary valve rotor disc sealing plate.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for machining and fixing a rotor disk sealing plate, comprising a main tooling and an auxiliary tooling that cooperate with the sealing plate, wherein the main tooling is a disc structure, a coaxial tooling through hole is provided at the center thereof, and a group of circular positioning holes, a group of equally divided holes and a group of fan-shaped process holes are also provided on the main tooling;

[0006] The equally divided holes are distributed on the outer circle of the main tooling, the circle formed by the center line of each equally divided hole is on the same axis as the main tooling, the circle where each fan-shaped process hole is located is also on the same axis as the main tooling, the positioning holes are evenly distributed on the main tooling, the circles form a group of concentric circles, and the diameter of the circle where the equally divided holes are located is greater than the diameter of the circle where each fan-shaped process hole is located;

[0007] There are 24 equally divided holes, which are arranged clockwise as 1#, 2#, 3#, ... 24#, and the angles between two adjacent equally divided holes are the same;

[0008] Each equally divided hole is connected to a corresponding auxiliary tooling, and the auxiliary tooling is divided into the first core filling, the second core filling, the third core filling and the fourth core filling. The first core filling corresponds to the 1# and 9# equally divided holes, the second core filling corresponds to the 4# and 18# equally divided holes, the third core filling corresponds to the 2#, 3#, 6#~8#, 11#~15#, 17#, 20#, 22#~24# equally divided holes, and the fourth core filling corresponds to the 5#, 10# and 16# equally divided holes;

[0009] The first filling core and the second filling core are both quadrilateral structures, and chamfers are provided at the corners, a raised first truncated cone is provided thereon, a first through hole is provided in the middle of the first truncated cone, the diameter of the first through hole is the same as the inner diameter of the first truncated cone, and a first mounting hole is provided around the first truncated cone;

[0010] The third filling core is a disc structure, with a second through hole in the middle, and second mounting holes are evenly distributed around the second through hole;

[0011] The fourth filling core is a disc structure with a raised second truncated cone on it. A third through hole is provided in the middle of the second truncated cone. The diameter of the third through hole is the same as the inner diameter of the second truncated cone. The third mounting holes are evenly distributed around the second truncated cone.

[0012] In order to further achieve the purpose of the present invention, a method for machining and fixing a rotor disk sealing plate is also provided, and the specific steps are as follows, including:

[0013] (1) Selection of the main tooling: The material of the main tooling is ductile iron with a diameter of φ1600×60mm and a thickness of 60mm. The material is specially treated to make its hardness within a suitable range for subsequent processing, while not changing due to changes in ambient temperature.

[0014] (2) Grinding of the main tooling: The outer dimensions of the main tooling are made according to the requirements of the drawing, so that the outer diameter of the main tooling is slightly larger than the outer diameter of the product. At the same time, the two sides of the main tooling are ground to control the parallelism within 0.02mm, and the surface roughness of the main tooling is ground to Ra0.4 to effectively ensure the flatness of the sealing plate;

[0015] (3) Processing of process holes: Process circular positioning holes, equally divided holes and fan-shaped process holes on the main tooling according to the requirements of the drawings;

[0016] (4) Production of auxiliary tooling: The core filling is made according to the requirements of the drawings. The core filling is made of PLIFC material. When the core filling contacts the sealing plate, it will not damage the surface of the sealing plate. The size of the core filling changes with temperature and is consistent with that of the sealing plate, which is beneficial to the dimensional stability of the sealing plate processing.

[0017] (5) Fixing of the sealing plate: The sealing plate is fastened to the main tooling by bolts, and the filling cores are sequentially installed into the corresponding positions on the main tooling plate to ensure that the sealing plate is subjected to uniform force during grinding.

[0018] Furthermore, in the step (1), the special treatment is a tempering treatment, and the hardness of the material after the tempering treatment is 210HB.

[0019] Furthermore, in the step (3), the number of circular positioning holes is set to 463, the number of equally divided holes is set to 24, and the number of fan-shaped process holes is set to 7.

[0020] Furthermore, in step (3), the relative positions of the positioning holes, the diameter of the circle in which each group of positioning holes is located and the depth of the countersunk holes, as well as the positions and depths of the equally divided holes and the fan-shaped ring process holes must be processed strictly in accordance with the dimensions on the drawing, and the shape and position dimensional accuracy error is controlled within 0.01 mm, and the angle error is controlled within 0.05°.

[0021] Furthermore, the diameter of the 1# equally divided hole corresponding to the first core filling is φ120.5 mm, the diameter of the 9# equally divided hole is φ101.5 mm, and the direction of the center line of the 1# equally divided hole is set to the 0° direction.

[0022] Furthermore, the diameter of the 4# and 18# equally divided holes corresponding to the second core filling is φ120.5 mm.

[0023] Furthermore, the diameters of the 5#, 10# and 16# equally divided holes corresponding to the fourth core filling are φ53.8 mm.

[0024] Furthermore, the fan-shaped process holes are set to 1#, 2#, 3#, 4#, 5#, 6# and 7# in order from far to near according to the length from the center of the main tooling. The outer ring diameter of the 1# fan-shaped process hole is φ1039mm, the inner ring diameter is φ993mm, the arc is 19.34°, and the rounding is R11.5. The angle between the line and the 0° direction is 215°. The outer ring diameter of the 2# fan-shaped process hole is φ974.5mm, the inner ring diameter is φ849mm, the arc is 37.94°, and the rounding is R17.5. The angle between the line and the 0° direction is 35°. The outer ring diameter of the 3# fan-shaped process hole is φ832mm, the inner ring diameter is φ628mm, the arc is 52.5°, and the rounding is R17.5. The angle between the line and the 0° direction is 97.5°. The outer ring diameter of the 4# fan-shaped process hole is φ832mm, the inner ring diameter is φ628mm, the arc is 52.5°, and the rounding is R17.5. The angle between the line and the 0° direction is 97.5°. The ring diameter is φ546.5mm, the inner ring diameter is φ386mm, the arc is 83.8°, and the fillet is R17.5. The angle between the line and the 0° direction is -117.5°. The outer ring diameter of the 5# fan-shaped annular process hole is φ610.5mm, the inner ring diameter is φ564.5mm, the arc is 33.69°, and the fillet is R11.5. The angle between the line and the 0° direction is 32.5°. The outer ring diameter of the 6# fan-shaped annular process hole is φ368.5mm, the inner ring diameter is φ322.5mm, the arc is 57.33°, and the fillet is R11.5. The angle between the line and the 0° direction is -17.4°. The outer ring diameter of the 7# fan-shaped annular process hole is φ306mm, the inner ring diameter is φ183mm, the arc is 90°, and the fillet is R18.5. The angle between the line and the 0° direction is 135°.

[0025] In the technical solution of the present invention, by selecting the main tooling after special treatment, its hardness is within the appropriate range, so as to facilitate subsequent processing, and at the same time will not change due to changes in ambient temperature, and the deformation amount of the sealing plate during the manufacturing process is controlled. In addition, the surface roughness and parallelism of the main tooling are controlled within a certain range, which can effectively ensure the flatness of the sealing plate and ensure that the dimensional deviation will not occur due to uneven force during the processing of the sealing plate; the auxiliary tooling is made of PLIFC, which is a special plastic. The hardness and expansion rate of this material are very close to those of the sealing plate, ensuring that the surface of the sealing plate will not be damaged when in contact with the sealing plate, and the amplitude of the core filling size change with temperature is consistent with that of the sealing plate, which is conducive to the dimensional stability of the sealing plate processing. The device and method of the present invention can fix the sealing plate during the manufacturing process of the sealing plate, avoid the phenomenon of loss of control of the processing accuracy of the special material sealing plate due to temperature difference deformation, improve the product dimensional accuracy and flatness, and realize the localization of the imported rotary valve rotor disk sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the main tooling of the present invention;

[0027] Figure 2It is a cross-sectional view of the main tooling of the present invention along the central axis;

[0028] Figure 3 It is a rear view of the main tooling of the present invention;

[0029] Figure 4 It is a schematic diagram of the dimensions of the main tooling in this embodiment;

[0030] Figure 5 It is a structural schematic diagram of the first core filling of the present invention;

[0031] Figure 6 is a cross-sectional view of a first core filler of the present invention;

[0032] Figure 7 is a schematic structural diagram of the second core filling of the present invention;

[0033] Figure 8 is a cross-sectional view of a second core filler of the present invention;

[0034] Fig. 9 is a schematic structural diagram of a third core filling of the present invention;

[0035] Fig.10 is a cross-sectional view of a third core filler of the present invention;

[0036] Fig.11 is a schematic structural diagram of a fourth core filling of the present invention;

[0037] Fig.12 It is a cross-sectional view of a fourth core filler according to the present invention. DETAILED DESCRIPTION

[0038] Example 1

[0039] To make the present invention more clear, a device and method for machining and fixing a rotor disk sealing plate of the present invention are further described below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] See also Figure 1 , Figures 5 to 12 , a device for machining and fixing a rotor disk sealing plate, comprising a main tool 1 and an auxiliary tool 2 that cooperate with the sealing plate, characterized in that:

[0041] See also Figures 1 to 3 The main tooling 1 is a disc structure, with a coaxial tooling through hole 1a at the center, and a group of circular positioning holes 1b, a group of equally divided holes 1c and a group of fan-shaped process holes 1d are also provided on the main tooling 1;

[0042] The equally divided holes 1c are distributed on the outer circle of the main tooling 1. The circle formed by the center line of each equally divided hole 1c is on the same axis as the main tooling 1. The circle where each fan-shaped process hole 1d is located is also on the same axis as the main tooling 1. The positioning holes 1b are evenly distributed on the main tooling 1. The circles form a group of concentric circles, and the diameter of the circle where the equally divided holes 1c are located is greater than the diameter of the circle where each fan-shaped process hole 1d is located.

[0043] The number of equally divided holes 1c is 24, which are sequentially set as 1#, 2#, 3#, ... 24#, and the angle between two adjacent equally divided holes 1c is the same;

[0044] See also Figures 5 to 12 , each equally divided hole 1c is connected to a corresponding auxiliary tooling 2, the auxiliary tooling 2 is divided into a first filling core 21, a second filling core 22, a third filling core 23 and a fourth filling core 24, the first filling core 21 corresponds to 1# and 9# equally divided holes, the second filling core 22 corresponds to 4# and 18# equally divided holes, the third filling core 23 corresponds to 2#, 3#, 6#~8#, 11#~15#, 17#, 20#, 22#~24# equally divided holes, and the fourth filling core 24 corresponds to 5#, 10# and 16# equally divided holes;

[0045] See also Figures 5 to 8 The first filling core 21 and the second filling core 22 are both quadrilateral structures, and a chamfer 21a is provided at the corner, a raised first truncated cone 21b is provided thereon, a first through hole 21c is provided in the middle of the first truncated cone 21b, the diameter of the first through hole 21c is the same as the inner diameter of the first truncated cone 21b, and a first mounting hole 21d is provided around the first truncated cone 21b;

[0046] See also Fig. 9 , 10 The third filling core 23 is a disc structure, wherein a second through hole 23a is provided in the middle thereof, and second mounting holes 23b are evenly distributed around the second through hole 23a;

[0047] See also Fig.11 , 12 The fourth filling core 24 is a disc structure, on which a raised second truncated cone 24a is provided, a third through hole 24b is provided in the middle of the second truncated cone 24a, the diameter of the third through hole 24b is the same as the inner diameter of the second truncated cone 24a, and third mounting holes 24c are evenly distributed around the second truncated cone 24a.

[0048] This embodiment also provides a design dimension drawing of the main tooling 1 and the auxiliary tooling 2, see Figure 4 Drawing requirements for main tooling 1, Figures 5 to 12 According to the requirements of the four core-filling drawings, the method for processing and fixing the rotor disk sealing plate according to the drawings has the following specific steps, which are characterized by comprising:

[0049] (1) Selection of the main tooling: The material of the main tooling 1 is ductile iron with a diameter of φ1600×60mm, and the material is quenched and tempered to make its hardness 210HB, so as to facilitate subsequent processing and not change due to changes in ambient temperature;

[0050] (2) Grinding of the main tooling: The outer dimensions of the main tooling 1 are made according to the requirements of the drawing, so that the outer diameter of the main tooling 1 is slightly larger than the outer diameter of the product. At the same time, the two sides of the main tooling are ground to control the parallelism within 0.02mm, and the surface roughness of the main tooling is ground to Ra0.4 to effectively ensure the flatness of the sealing plate;

[0051] (3) Processing of process holes: According to the requirements of the drawings, 463 circular positioning holes 1b, 24 equally divided holes 1c and 7 fan-shaped process holes 1d are processed on the main tooling 1. As shown in the drawings, the 24 equally divided holes 1c in the outermost circle are numbered 1# to 24# in sequence. The relative positions of the positioning holes 1b, the diameter of the circle where each group of positioning holes 1b is located and the depth of the countersunk holes, as well as the positions and depths of the equally divided holes 1c and the fan-shaped process holes 1d must be processed strictly according to the dimensions of the drawings. The shape and position dimensional accuracy error is controlled within 0.01mm, and the angle error is controlled within 0.05°.

[0052] (4) Production of auxiliary tooling: The core filling is made according to the requirements of the drawings. The core filling is made of PLIFC material. When the core filling contacts the sealing plate, it will not damage the surface of the sealing plate. The size of the core filling changes with temperature and is consistent with that of the sealing plate, which is beneficial to the dimensional stability of the sealing plate processing.

[0053] (5) Fixing of the sealing plate: The sealing plate is fastened to the main tooling 1 by bolts, and the filling cores are sequentially installed into corresponding positions on the main tooling plate 1 to ensure that the sealing plate is subjected to uniform force during grinding.

[0054] Referring to the dimensions shown in the drawing, the diameter of the 1# equally divided hole corresponding to the first core filling 21 is φ120.5mm, the diameter of the 9# equally divided hole is φ101.5mm, the direction of the centerline of the 1# equally divided hole is set to the 0° direction, the diameter of the 4# and 18# equally divided holes corresponding to the second core filling 22 is φ120.5mm, and the diameter of the 5#, 10# and 16# equally divided holes corresponding to the fourth core filling 24 is φ53.8mm.

[0055] See also Figure 4The fan-shaped annular process holes are set as 1#, 2#, 3#, 4#, 5#, 6# and 7# in order from far to near according to the length from the center of the main tooling. The outer ring diameter of the 1# fan-shaped annular process hole is φ1039mm, the inner ring diameter is φ993mm, the arc is 19.34°, and the rounding is R11.5. The angle between line Ⅰ and the 0° direction is 215°. The outer ring diameter of the 2# fan-shaped annular process hole is φ974.5mm, the inner ring diameter is φ849mm, the arc is 37.94°, and the rounding is R17.5. The angle between line Ⅱ and the 0° direction is 35°. The outer ring diameter of the 3# fan-shaped annular process hole is φ832mm, the inner ring diameter is φ628mm, the arc is 52.5°, and the rounding is R17.5. The angle between line Ⅲ and the 0° direction is 97.5°. The outer ring diameter of the 4# fan-shaped annular process hole is φ832mm, the inner ring diameter is φ628mm, the arc is 52.5°, and the rounding is R17.5. The angle between line Ⅲ and the 0° direction is 97.5°. φ546.5mm, inner ring diameter φ386mm, arc 83.8°, chamfer R17.5, of which the angle between line IV and the 0° direction is -117.5°, the outer ring diameter of the 5# fan-shaped annular process hole is φ610.5mm, the inner ring diameter is φ564.5mm, the arc 33.69°, the chamfer R11.5, of which the angle between line V and the 0° direction is 32.5°, the outer ring diameter of the 6# fan-shaped annular process hole is φ368.5mm, the inner ring diameter is φ322.5mm, the arc 57.33°, the chamfer R11.5, of which the angle between line VI and the 0° direction is -17.4°, the outer ring diameter of the 7# fan-shaped annular process hole is φ306mm, the inner ring diameter is φ183mm, the arc 90°, the chamfer R18.5, of which the angle between line VII and the 0° direction is 135°.

[0056] In the present invention, the function of the core filling is to ensure that the sealing plate will not have dimensional deviation due to uneven force during processing.

[0057] In the present invention, the auxiliary tooling is made of PLIFC, which is a special plastic. The hardness and expansion ratio of this material are very close to those of the sealing plate. When in contact with the sealing plate, it will not damage the surface of the sealing plate. The amplitude of the core filling size change with temperature is consistent with that of the sealing plate, which is beneficial to the dimensional stability of the sealing plate processing.

[0058] In the present invention, the number of positioning holes can be reduced on the basis of the tooling, and the cooperation of auxiliary tooling is unnecessary.

[0059] The device and method of the present invention can effectively avoid the phenomenon of loss of control of processing accuracy of special material sealing plates caused by temperature difference deformation, improve product dimensional accuracy and flatness, and realize the localization of imported rotary valve rotor disk sealing plates.

[0060] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A device for machining and fixing a rotor disk sealing plate, comprising a main tool (1) and an auxiliary tool (2) that cooperate with the sealing plate, Features: The main tooling (1) is a disc structure, with a coaxial tooling through hole (1a) provided at the center thereof, and the main tooling (1) is also provided with a group of circular positioning holes (1b), a group of equally divided holes (1c) and a group of fan-shaped process holes (1d); The equally divided holes (1c) are distributed on the outer circle of the main tooling (1), the circle formed by the center line of each equally divided hole (1c) is on the same axis as the main tooling (1), the circle where each fan-shaped annular process hole (1d) is located is also on the same axis as the main tooling (1), the positioning holes (1b) are evenly distributed on the main tooling (1), the circles form a group of concentric circles, and the diameter of the circle where the equally divided holes (1c) are located is greater than the diameter of the circle where each fan-shaped annular process hole (1d) is located; The number of equally divided holes (1c) is set to 24, which are sequentially set to 1#, 2#, 3#, ... 24# in a clockwise direction, and the angles between two adjacent equally divided holes (1c) are the same; Each equally divided hole (1c) is connected to an auxiliary tooling (2), the auxiliary tooling (2) is divided into a first filling core (21), a second filling core (22), a third filling core (23) and a fourth filling core (24), the first filling core (21) corresponds to the 1# and 9# equally divided holes, the second filling core (22) corresponds to the 4# and 18# equally divided holes, the third filling core (23) corresponds to the 2#, 3#, 6# to 8#, 11# to 15#, 17#, 20#, 22# to 24# equally divided holes, and the fourth filling core (24) corresponds to the 5#, 10# and 16# equally divided holes; The first filling core (21) and the second filling core (22) are both quadrilateral structures, and chamfers (21a) are provided at the corners, a protruding first truncated cone (21b) is provided thereon, a first through hole (21c) is provided in the middle of the first truncated cone (21b), the diameter of the first through hole (21c) is the same as the inner diameter of the first truncated cone (21b), and first mounting holes (21d) are provided around the first truncated cone (21b); The third filling core (23) is a disc structure, with a second through hole (23a) provided in the middle thereof, and second mounting holes (23b) evenly distributed around the second through hole (23a); The fourth filling core (24) is a disc structure, on which a raised second truncated cone (24a) is provided, a third through hole (24b) is provided in the middle of the second truncated cone (24a), the diameter of the third through hole (24b) is the same as the inner diameter of the second truncated cone (24a), and third mounting holes (24c) are evenly distributed around the second truncated cone (24a).

2. A method for machining and fixing a rotor disk sealing plate using the device as claimed in claim 1, the specific steps are as follows: It is characterized in that include: Step 1, selection of the main tooling (1): The material of the main tooling is ductile iron with a diameter of φ1600×60 mm, and the material is specially treated to make its hardness within a suitable range to facilitate subsequent processing and not change due to changes in ambient temperature; Step 2, grinding of the main tooling (1): the outer dimensions of the main tooling are manufactured according to the requirements of the drawing, so that the outer diameter of the main tooling is slightly larger than the outer diameter of the product, and both sides of the main tooling are ground so that the parallelism is controlled within 0.02 mm, and the surface roughness of the main tooling is ground to Ra0.4, so as to effectively ensure the flatness of the sealing plate; Step 3: Processing of process holes: Process circular positioning holes (1b), equally divided holes (1c) and fan-shaped process holes (1d) on the main tooling according to the requirements of the drawing; Step 4, making the auxiliary tooling (2): making the core filler according to the drawing requirements. The core filler is made of PLIFC material. When the core filler contacts the sealing plate, it will not damage the surface of the sealing plate. The size of the core filler changes with temperature in the same range as the sealing plate, which is beneficial to the dimensional stability of the sealing plate processing. Step 5, fixing of the sealing plate: fasten the sealing plate to the main tooling with bolts, and install the filling cores into corresponding positions on the main tooling plate in sequence to ensure that the sealing plate is evenly stressed during grinding.

3. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: In the step 1, the special treatment is a tempering treatment, and the hardness of the material after the tempering treatment is 210HB.

4. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: In the step three, the number of circular positioning holes is set to 463, the number of equally divided holes is set to 24, and the number of fan-shaped process holes is set to 7.

5. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: In the step three, the relative positions of the positioning holes, the diameter of the circle in which each group of positioning holes is located and the depth of the countersunk holes, as well as the positions and depths of the equally divided holes and fan-shaped ring process holes must be processed strictly according to the drawing dimensions, and the shape and position dimensional accuracy errors are controlled within 0.01mm, and the angle errors are controlled within 0.05°.

6. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: The diameter of the 1# equally divided hole corresponding to the first core filling is φ120.5 mm, the diameter of the 9# equally divided hole is φ101.5 mm, and the direction of the center line of the 1# equally divided hole is set to be 0° direction.

7. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: The diameter of the 4# and 18# equally divided holes corresponding to the second core filling is φ120.5 mm.

8. The method for machining and fixing a rotor disk sealing plate according to claim 2, Features: The diameter of the 5#, 10# and 16# equally divided holes corresponding to the fourth core filling is φ53.8 mm.

9. The method for machining and fixing a rotor disk sealing plate according to claim 6, Features: The fan-shaped annular process holes are set as 1#, 2#, 3#, 4#, 5#, 6# and 7# in order from far to near according to the length from the center of the main tooling. The outer ring diameter of the 1# fan-shaped annular process hole is φ1039mm, the inner ring diameter is φ993mm, the arc is 19.34°, and the rounding is R11.

5. The angle between the middle line and the 0° direction is 215°. The outer ring diameter of the 2# fan-shaped annular process hole is φ974.5mm, the inner ring diameter is φ849mm, the arc is 37.94°, and the rounding is R17.

5. The angle between the middle line and the 0° direction is 35°. The outer ring diameter of the 3# fan-shaped annular process hole is φ832mm, the inner ring diameter is φ628mm, the arc is 52.5°, and the rounding is R17.

5. The angle between the middle line and the 0° direction is 97.5°. The outer ring diameter of the 4# fan-shaped annular process hole is φ974.5mm, the inner ring diameter is φ849mm, the arc is 37.94°, and the rounding is R17.

5. The angle between the middle line and the 0° direction is 35°. The diameter is φ546.5mm, the inner ring diameter is φ386mm, the radian is 83.8°, and the fillet is R17.

5. The angle between the line and the 0° direction is -117.5°. The outer ring diameter of the 5# fan-shaped annular process hole is φ610.5mm, the inner ring diameter is φ564.5mm, the radian is 33.69°, and the fillet is R11.

5. The angle between the line and the 0° direction is 32.5°. The outer ring diameter of the 6# fan-shaped annular process hole is φ368.5mm, the inner ring diameter is φ322.5mm, the radian is 57.33°, and the fillet is R11.

5. The angle between the line and the 0° direction is -17.4°. The outer ring diameter of the 7# fan-shaped annular process hole is φ306mm, the inner ring diameter is φ183mm, the radian is 90°, and the fillet is R18.

5. The angle between the line and the 0° direction is 135°.

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