A tooling fixture for connecting plate of upper tube socket of fuel assembly

Abstract

The present invention specifically relates to a tooling fixture for a connection plate of a tube socket on a fuel assembly, including a fixture for processing the front side of the connection plate of a tube socket on a fuel assembly and a fixture for processing the back side of the connection plate of a tube socket on a fuel assembly, wherein the fixture for processing the front side of the connection plate of a tube socket on a fuel assembly is a positioning clamping fixture, and the fixture for processing the back side of the connection plate of a tube socket on a fuel assembly is a positioning pin fixture. The tooling fixture for the connection plate of a tube socket on a fuel assembly provided by the present invention has reliable positioning and clamping, small secondary clamping positioning error, less processing auxiliary time, small cutting stress deformation, and low rework rate, and can meet the requirements for shape and position accuracy and dimensional accuracy of the front and back sides of the connection plate of a tube socket on a fuel assembly, and realizes mass production of the connection plate of a tube socket on a fuel assembly.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear fuel assemblies, and in particular relates to a tooling fixture for a connecting plate of a tube seat on a fuel assembly. Background Art

[0002] The structure of the upper tube socket connecting plate of "Hualong One" is complex and unique, the outer dimensions of the blank fluctuate greatly and are irregular, and there are many holes and grooves in the connecting plate. The flat-mouth vise clamping used in the existing technology often causes the workpiece to loosen or deform, and cannot meet the flatness, parallelism, position, coaxiality and form and position tolerance accuracy requirements of the upper tube socket connecting plate of the fuel assembly. In addition, the processing efficiency is low and the labor intensity is high, which is not conducive to the mass production of workpieces. Summary of the invention

[0003] Based on this, it is necessary to provide a tooling fixture for the upper tube socket connecting plate of a fuel assembly to address the problem that the existing flat-mouth vise cannot meet the requirements of the shape and position accuracy and dimensional accuracy of the front and back surfaces of the upper tube socket connecting plate of the fuel assembly. The fixture can meet the requirements of the shape and position accuracy and dimensional accuracy of the front and back surfaces of the upper tube socket connecting plate of the fuel assembly, and realize the mass production of the upper tube socket connecting plate of the fuel assembly.

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

[0005] A tooling fixture for a connection plate of a tube seat on a fuel assembly includes a fixture for processing the front side of the connection plate of the tube seat on a fuel assembly and a fixture for processing the back side of the connection plate of the tube seat on a fuel assembly. The fixture for processing the front side of the connection plate of the tube seat on a fuel assembly is a positioning clamping fixture, and the fixture for processing the back side of the connection plate of the tube seat on a fuel assembly is a positioning pin fixture. Further, the positioning clamping fixture includes a first substrate, a first base, a support block, a positioning block and a sliding pressure plate. The first base is fixedly mounted on the first substrate. The first base is a square plate. The support block is fixedly mounted on the four corners of the first base. The positioning block is fixedly mounted on a pair of right-angled sides of the first base. The sliding pressure plate is slidably mounted on another pair of right-angled sides of the first tight base. The positioning block and the sliding pressure plate are both on the outside of the support block.

[0006] Furthermore, the support block is interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate of the fuel assembly, the positioning block and the sliding pressure plate are both on the outside of the support block, the space between the support block and the positioning block is the clamping space of a pair of right-angle frames of the upper tube socket connecting plate of the fuel assembly, the space between the support block and the sliding pressure plate is the clamping space of another pair of right-angle frames of the upper tube socket connecting plate of the fuel assembly, and the space between the support blocks is the clamping space of the bottom plate of the upper tube socket connecting plate of the fuel assembly.

[0007] Furthermore, two positioning blocks are symmetrically mounted on one right-angled side of a pair of right-angled sides of the first base, and one positioning block is mounted at the center of the other right-angled side of the pair of right-angled sides of the first base.

[0008] Furthermore, two sliding pressure plates are symmetrically mounted on one right-angled side of the other pair of right-angled sides of the first base, and one sliding pressure plate is mounted at the center of the other right-angled side of the other pair of right-angled sides of the first base.

[0009] Furthermore, the right-angled side on which the two positioning blocks are installed is opposite to the right-angled side on which the two sliding pressure plates are installed, and the right-angled side on which one positioning block is installed is opposite to the right-angled side on which one sliding pressure plate is installed.

[0010] Furthermore, the positioning block is a structure with flat sides and a raised middle.

[0011] Furthermore, the sliding pressure plate is a structure with flat sides and a raised middle.

[0012] Furthermore, a first threaded hole matching with a first screw is arranged at the center of the sliding pressure plate, and the sliding pressure plate is fixed by the first screw.

[0013] Furthermore, the positioning pin fixture includes a second substrate, a second base, a third base, and a fixed frame, the second substrate is respectively fixedly mounted with a second base and a third base which are perpendicular to each other, the fixed frame is fixedly mounted on the second base and the third base, and positioning pins are arranged at the four corners of the fixed frame on the second base.

[0014] Furthermore, there are two second bases, which are symmetrically installed on the second substrate.

[0015] Furthermore, there are two third bases, which are symmetrically installed on the second substrate.

[0016] Furthermore, the positioning pins are interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate of the fuel assembly, the right-angle frame of the upper tube socket connecting plate of the fuel assembly is placed on the fixed frame, and the space between the positioning pins is the clamping space of the bottom plate of the upper tube socket connecting plate of the fuel assembly.

[0017] Furthermore, two first protrusions are symmetrically arranged at two ends of the second base, two round tables are symmetrically arranged at two ends of the third base, the fixing frame is placed on the first protrusions and the round tables, and the fixing frame is fixed to the second base and the third base by screws.

[0018] Furthermore, a second protrusion is arranged at the center of the second base, a second threaded hole matching the second screw is arranged at the center of the second protrusion, a second threaded hole matching the second screw is arranged at a corresponding position of the fixing frame, and the fixing frame and the second base are fixed by the second screw.

[0019] Furthermore, a third threaded hole matching with a third screw is arranged at the center of the third base, a third threaded hole matching with the third screw is arranged at a corresponding position of the fixing frame, and the fixing frame and the third base are fixed by the third screw.

[0020] Furthermore, a fourth threaded hole matching with a fourth screw is provided on the outer side of the fixing frame, and the fixing frame and the upper tube socket connecting plate of the fuel assembly are transversely fixed by the fourth screw. The fourth screw provides a transverse clamping force to connect the fixing frame and the upper tube socket connecting plate of the fuel assembly into a whole.

[0021] Furthermore, the first screw, the second screw, the third screw and the fourth screw are all standard M8 screws.

[0022] The positioning clamping fixture uses four support blocks, three positioning blocks for positioning, and three sliding pressure plates to clamp the upper tube socket connection plate of the fuel assembly. The positioning surface and clamping surface are reduced, and the clamping force acts on the position where the strength of the upper tube socket connection plate of the fuel assembly is high. The positioning clamping is less affected by the outer dimensions of the blank, and the positioning clamping of the upper tube socket connection plate of the fuel assembly is more reliable.

[0023] The positioning pin fixture adopts one side and four pins for positioning. The fourth screw is pressed downward with the fixing frame and the second and third screws. The direction of the pressing force is exactly perpendicular to the direction of the cutting force. Therefore, it does not require too much clamping force to reliably clamp the upper tube seat connecting plate of the fuel assembly. The upper tube seat connecting plate of the fuel assembly has good rigidity in the vertical direction, and the deformation of the upper tube seat connecting plate of the fuel assembly is small due to the clamping force, thereby ensuring the requirements of form and position tolerance. The tooling can be equipped with multiple fixing frames, and the upper tube seat connecting plate of the fuel assembly is connected to the fixing frame in advance to reduce the auxiliary processing time.

[0024] Beneficial technical effects of the present invention:

[0025] The tooling fixture for the tube socket connection plate on the fuel assembly provided by the present invention has reliable positioning and clamping, small secondary clamping positioning error, less processing auxiliary time, small cutting stress deformation, and low rework rate. It can meet the requirements of shape and position accuracy and dimensional accuracy on both the front and back sides of the tube socket connection plate on the fuel assembly, and realize mass production of the tube socket connection plate on the fuel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the upper tube socket connecting plate of the fuel assembly;

[0027] Figure 2 It is a cross-sectional view of the upper tube socket connection plate of the fuel assembly;

[0028] Figure 3 This is a disassembled diagram of the processing status of the fixture used for processing the front side of the upper tube socket connection plate of the fuel assembly;

[0029] Figure 4 This is a disassembled diagram of the fixture processing status for processing the reverse side of the upper tube socket connection plate of the fuel assembly;

[0030] Figure 5 It is a top view of the processing state of the fixture used for processing the reverse side of the upper tube socket connection plate of the fuel assembly;

[0031] Figure 6 This is the front view of the fixture processing state for processing the reverse side of the upper tube socket connection plate of the fuel assembly;

[0032] Figure 7 is a top view of the second base;

[0033] Figure 8 is the main view of the second base;

[0034] Fig. 9 This is the main view of the third base;

[0035] Fig.10 This is the left view of the third base.

[0036] in:

[0037] 1. Connecting plate of the upper tube seat of the fuel assembly; 2. The first base plate; 3. The first base; 4. The support block; 5. The positioning block; 6. The sliding pressure plate; 7. The second base plate; 8. The second base; 9. The third base; 10. The fixing frame; 11. The positioning pin; 12. The first screw; 13. The second screw; 14. The third screw; 15. The fourth screw; 16. The first protrusion; 17. The second protrusion; 18. The round table. DETAILED DESCRIPTION

[0038] A tooling fixture for a tube socket connection plate on a fuel assembly comprises a fixture for processing the front side of the tube socket connection plate on the fuel assembly and a fixture for processing the back side of the tube socket connection plate on the fuel assembly. The fixture for processing the front side of the tube socket connection plate on the fuel assembly is a positioning clamping fixture, and the fixture for processing the back side of the tube socket connection plate on the fuel assembly is a positioning pin fixture.

[0039] Furthermore, the positioning and clamping fixture includes a first substrate 2, a first base 3, a support block 4, a positioning block 5 and a sliding pressure plate 6. The first base 3 is fixedly installed on the first substrate 2. The first base 3 is a square plate. The support block 4 is fixedly installed on the four corners of the first base 3. The positioning block 5 is fixedly installed on a pair of right-angled sides of the first base 3. The sliding pressure plate 6 is slidably installed on another pair of right-angled sides of the first tight base. The positioning block 5 and the sliding pressure plate 6 are both on the outside of the support block 4.

[0040] Furthermore, the support block 4 is interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate 1 of the fuel assembly, the positioning block 5 and the sliding pressure plate 6 are both on the outside of the support block 4, the space between the support block 4 and the positioning block 5 is the clamping space of a pair of right-angle frames of the upper tube socket connecting plate 1 of the fuel assembly, the space between the support block 4 and the sliding pressure plate 6 is the clamping space of another pair of right-angle frames of the upper tube socket connecting plate 1 of the fuel assembly, and the space between the support blocks 4 is the clamping space of the bottom plate of the upper tube socket connecting plate 1 of the fuel assembly.

[0041] Furthermore, two positioning blocks 5 are symmetrically installed on one right-angled side of a pair of right-angled sides of the first base 3 , and one positioning block 5 is installed at the center of the other right-angled side of the pair of right-angled sides of the first base 3 .

[0042] Furthermore, two sliding pressure plates 6 are symmetrically mounted on one right-angled side of the other pair of right-angled sides of the first base 3 , and one sliding pressure plate 6 is mounted at the center of the other right-angled side of the other pair of right-angled sides of the first base 3 .

[0043] Furthermore, the right-angled side where the two positioning blocks 5 are installed is opposite to the right-angled side where the two sliding pressure plates 6 are installed, and the right-angled side where one positioning block 5 is installed is opposite to the right-angled side where one sliding pressure plate 6 is installed.

[0044] Furthermore, the positioning block 5 is a structure with flat sides and a raised middle.

[0045] Furthermore, the sliding pressure plate 6 is a structure with flat sides and a raised middle.

[0046] Furthermore, a first threaded hole matching the first screw 12 is provided at the center of the sliding pressure plate 6 , and the sliding pressure plate 6 is fixed by the first screw 12 .

[0047] Furthermore, the positioning pin 11 fixture includes a second substrate 7, a second base 8, a third base 9, and a fixed frame 10. The second substrate 7 is respectively fixedly mounted with a second base 8 and a third base 9 which are perpendicular to each other. The fixed frame 10 is fixedly mounted on the second base 8 and the third base 9. Positioning pins 11 are arranged at the four corners of the fixed frame 10 on the second base 8.

[0048] Furthermore, there are two second bases 8 , which are symmetrically mounted on the second substrate 7 .

[0049] Furthermore, there are two third bases 9 , which are symmetrically mounted on the second substrate 7 .

[0050] Furthermore, the positioning pins 11 are interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate 1 of the fuel assembly, the right-angle frame of the upper tube socket connecting plate 1 of the fuel assembly is placed on the fixed frame 10, and the space between the positioning pins 11 is the clamping space of the bottom plate of the upper tube socket connecting plate 1 of the fuel assembly.

[0051] Furthermore, two first protrusions 16 are symmetrically provided at both ends of the second base 8, two frustums 18 are symmetrically provided at both ends of the third base 9, the fixed frame 10 is placed on the first protrusions 16 and frustums 18, and the fixed frame 10 is fixed to the second base 8 and the third base 9 by screws.

[0052] Furthermore, a second protrusion 17 is arranged at the center of the second base 8, a second threaded hole matching the second screw 13 is arranged at the center of the second protrusion 17, a second threaded hole matching the second screw 13 is arranged at the corresponding position of the fixing frame 10, and the fixing frame 10 and the second base 8 are fixed by the second screw 13.

[0053] Furthermore, a third threaded hole matching the third screw 14 is disposed at the center of the third base 9 , and a third threaded hole matching the third screw 14 is disposed at a corresponding position of the fixing frame 10 , and the fixing frame 10 and the third base 9 are fixed by the third screw 14 .

[0054] Furthermore, a fourth threaded hole matching the fourth screw 15 is provided on the outer side of the fixing frame 10, and the fixing frame 10 and the upper tube socket connecting plate 1 of the fuel assembly are transversely fixed by the fourth screw 15. The fourth screw 15 provides a transverse clamping force to connect the fixing frame 10 and the upper tube socket connecting plate 1 of the fuel assembly into a whole.

[0055] Furthermore, the first screw 12 , the second screw 13 , the third screw 14 and the fourth screw 15 are all standard M8 screws.

[0056] The positioning clamping fixture uses four support blocks 4, three positioning blocks 5 for positioning, and three sliding pressure plates 6 to clamp the upper tube socket connection plate 1 of the fuel assembly. The positioning surface and the clamping surface are reduced, and the clamping force acts on the position where the strength of the upper tube socket connection plate 1 of the fuel assembly is high. The positioning clamping is less affected by the outer dimensions of the blank, and the positioning clamping of the upper tube socket connection plate 1 of the fuel assembly is more reliable.

[0057] The positioning pin 11 fixture adopts one side and four pins for positioning. The fourth screw 15 is pressed downward with the fixing frame 10 and the second screw 13 and the third screw 14. The direction of the pressing force is exactly perpendicular to the direction of the cutting force. Therefore, it does not require too much clamping force to reliably clamp the upper tube seat connecting plate 1 of the fuel assembly. The upper tube seat connecting plate 1 of the fuel assembly has good rigidity in the vertical direction, and the deformation of the upper tube seat connecting plate 1 of the fuel assembly is small under the influence of the clamping force, thereby ensuring the shape and position tolerance requirements. The tooling can be equipped with multiple fixing frames 10, and the upper tube seat connecting plate 1 of the fuel assembly is connected to the fixing frame 10 in advance to reduce the auxiliary processing time.

[0058] Steps:

[0059] Positioning and clamping fixture: Place the upper tube socket connecting plate 1 of the fuel assembly flatly on the support block 4, translate the upper tube socket connecting plate 1 of the fuel assembly to make it close to the positioning block 5, and then tighten the first screw 12 until it is clamped.

[0060] Positioning pin 11 fixture: Place the upper tube socket connecting plate 1 of the fuel assembly on the platform, tighten the fourth screw 15 to fix the fixing frame 10 on the upper tube socket connecting plate 1 of the fuel assembly, place the upper tube socket connecting plate 1 of the fuel assembly and the fixing frame 10 on the base and use the positioning pin 11 to position them, and then tighten the second screw 13 and the third screw 14 until they are securely fastened.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fixture for connecting plate of upper tube socket of fuel assembly, characterized in that: It comprises a fixture for processing the front side of the upper tube seat connection plate of the fuel assembly and a fixture for processing the back side of the upper tube seat connection plate of the fuel assembly, wherein the fixture for processing the front side of the upper tube seat connection plate of the fuel assembly is a positioning clamping fixture, and the fixture for processing the back side of the upper tube seat connection plate of the fuel assembly is a positioning pin fixture; The positioning clamping fixture comprises a first substrate, a first base, a supporting block, a positioning block and a sliding pressure plate, wherein the first base is fixedly mounted on the first substrate, the first base is in the shape of a square plate, the supporting block is fixedly mounted on the four corners of the first base, the positioning block is fixedly mounted on a pair of right-angled sides of the first base, the sliding pressure plate is slidably mounted on the other pair of right-angled sides of the first base, and the positioning block and the sliding pressure plate are both on the outside of the supporting block; The positioning pin fixture includes a second substrate, a second base, a third base, and a fixed frame. The second substrate is respectively fixedly mounted with a second base and a third base which are perpendicular to each other. The fixed frame is fixedly mounted on the second base and the third base. Positioning pins are arranged at the four corners of the fixed frame on the second base.

2. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 1, characterized in that: The support block is interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate of the fuel assembly. The positioning block and the sliding pressure plate are both on the outside of the support block. The space between the support block and the positioning block is the clamping space of a pair of right-angle frames of the upper tube socket connecting plate of the fuel assembly. The space between the support block and the sliding pressure plate is the clamping space of another pair of right-angle frames of the upper tube socket connecting plate of the fuel assembly. The space between the support blocks is the clamping space of the bottom plate of the upper tube socket connecting plate of the fuel assembly.

3. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 1, characterized in that: Two positioning blocks are symmetrically installed on one right-angled side of a pair of right-angled sides of the first base, and a positioning block is installed at the center of the other right-angled side of the pair of right-angled sides of the first base.

4. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 1, characterized in that: Two sliding pressure plates are symmetrically mounted on one right angle side of the other pair of right angle sides of the first base, and a sliding pressure plate is mounted at the center of the other right angle side of the other pair of right angle sides of the first base.

5. The fixture for connecting plate of upper tube socket of fuel assembly according to claim 1, characterized in that: A first threaded hole matching the first screw is arranged at the center of the sliding pressure plate, and the sliding pressure plate is fixed by the first screw.

6. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 5, characterized in that: The positioning pins are interference fit with the mounting holes on the four corners of the bottom plate of the upper tube socket connecting plate of the fuel assembly. The right-angle frame of the upper tube socket connecting plate of the fuel assembly is placed on the fixed frame. The space between the positioning pins is the clamping space of the bottom plate of the upper tube socket connecting plate of the fuel assembly.

7. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 5, characterized in that: The fixing frame is fixed to the second base and the third base by screws; the fixing frame is fixed to the second base by second screws; and the fixing frame is fixed to the third base by third screws.

8. The fixture for connecting plate of the upper tube seat of the fuel assembly according to claim 5, characterized in that: The fixing frame and the upper tube socket connecting plate of the fuel assembly are laterally fixed by fourth screws.

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