Plate type nuclear fuel element tube base machining device

Abstract

The utility model discloses a plate type nuclear fuel element tube base machining device, relates to the technical field of nuclear fuel element manufacturing, and is used for solving the research and machining problems of an existing plate type fuel element tube base. The device comprises a tailstock, an indexing head and an inner support of a pipe seat, wherein the tailstock and the indexing head are fixedly arranged on a machine tool workbench; the tailstock is provided with a center capable of freely stretching out and drawing back, and the center of the left end face of the inner support is tightly jacked through the center. A clamping jaw for clamping and fixing the right end of the inner support is arranged on the dividing head; the inner support can support and fix the pipe base with the inner hole as the reference, the left side of the inner support presses the check block through the nut to fix and press the pipe base, a workpiece has the rotary machining function, and after one face is machined, the workpiece is rotated to sequentially machine a four-face structure. The machining device is designed and manufactured according to the structural characteristics of the tube socket, and all the structures of the tube socket are machined through one-time clamping while the machining precision is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of nuclear fuel element manufacturing technology, specifically relating to a plate-type nuclear fuel element tube seat processing device. Background Technology

[0002] Plate-type fuel elements are a typical type of fuel element used in experimental reactors. Their components include fuel plates, side plates, sockets, lifting beams, support combs, screws, and pins. The sockets serve a supporting function within the reactor. The socket structure is a square tubular structure with drainage channels on all four sides. The sockets have small form and position tolerances and high dimensional accuracy. Machining them in separate processes is difficult to guarantee accuracy. To achieve the machining of this part, machining fixtures were designed and manufactured, and machining methods were determined, thus enabling the machining of this type of part and providing technical support for the research and production of this type of fuel element. Utility Model Content

[0003] The purpose of this utility model is to provide a processing device for plate-shaped nuclear fuel element tube seats, which solves the research and processing problems of existing plate-shaped fuel element tube seats, and ensures the smooth research and development and mass production of plate-shaped fuel elements while meeting the processing accuracy requirements.

[0004] A processing apparatus for plate-type nuclear fuel element tube seats includes: a tailstock, an indexing head, and an inner support for the tube seat, all fixedly mounted on a machine tool worktable; the tailstock is provided with a freely retractable center point, which clamps the center of the left end face of the inner support; the indexing head is provided with a chuck for clamping the right end of the inner support; the inner support can support and fix the tube seat with its inner hole as a reference, and the left side of the inner support is fixed and pressed by a nut-clamping block, enabling the workpiece to be rotated for processing. After processing one side, the workpiece is rotated to process all four sides sequentially.

[0005] The aforementioned processing apparatus for plate-type nuclear fuel element tube seats is characterized in that, when the top and the jaws are used to fix the internal support, they are first positioned at the center of their two end faces before being tightened.

[0006] The above-mentioned plate-type nuclear fuel element tube seat processing device is characterized in that the size of the stop block is slightly smaller than the outer dimensions of the left end face of the tube seat, so as to avoid interference with the cutting tool during the processing.

[0007] The above-mentioned plate-type nuclear fuel element tube holder processing device is characterized in that the internal support inside the tube holder is a rectangular structure.

[0008] The above-mentioned plate-type nuclear fuel element tube holder processing device is characterized in that the right end of the inner support has a positioning structure, which is positioned by pressing against the right end of the tube holder.

[0009] The aforementioned plate-type nuclear fuel element tube holder processing device is characterized in that the jaws on the indexing head can rotate to precisely position the processing angle.

[0010] The above-mentioned plate-type nuclear fuel element tube seat processing device is characterized in that, when processing each structure of the tube seat, the outer plane of the large end, the fixed surface of the side plate, the outer plane of the small end, the water channel, the chamfered edge, and the chamfered edge are processed in sequence. After processing one side of the tube seat, it is rotated and then the second side is processed, and the processing of the four sides of the tube seat is completed in sequence.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: The plate-type nuclear fuel element tube seat processing device provided by this utility model, on the one hand, is designed and manufactured according to the structural characteristics of the tube seat, enabling the entire structure to be processed in a single clamping operation using the inner hole as a reference. On the other hand, it solves the problem of difficulty in ensuring the processing accuracy of plate-type nuclear fuel element tube seats. Finally, this processing device enables the development and mass production of plate-type fuel element tube seats, providing technical support for the production of plate-type fuel elements for the first batch of advanced research and test reactors in China. Attached Figure Description

[0012] Figure 1 The diagram shown is a structural schematic of the plate-type nuclear fuel element tube seat processing device of this utility model;

[0013] Figure 2 The diagram shown is a schematic diagram of the tube seat of the plate-type nuclear fuel element tube seat processing device of this utility model.

[0014] Figure 3 The diagram shown is a schematic representation of the internal support of the plate-type nuclear fuel element tube seat processing device of this utility model.

[0015] Figure 4 The diagram shown is a schematic of the stop block of the plate-type nuclear fuel element tube seat processing device of this utility model.

[0016] The following are the labels in the attached diagram: 1. Outer plane of the large end; 2. Side plate fixing surface; 3. Beveled edge chamfer; 4. Straight edge chamfer; 5. Outer plane of the small end; 6. Flow channel; 7. Inner hole of the tube seat; 8. Screw hole; 9. Tailstock; 10. Center; 11. Stop block; 12. Inner support; 13. Tube seat; 14. Clamp; 15. Indexing head; 16. Machine tool worktable; 17. Nut. Detailed Implementation

[0017] The purpose of this utility model is to provide a processing device for plate-type nuclear fuel element tube seats, which solves the research and processing problems of existing tube seats. While ensuring processing accuracy, it realizes the processing of the entire structure in one clamping with the inner hole as the reference.

[0018] The technical solution adopted by this utility model to solve its technical problem is: a processing device for plate-type nuclear fuel element tube seats, such as... Figures 1-4 As shown, the machining device includes a tailstock 9 and an indexing head 15 fixedly mounted on the machine tool worktable 16, as well as an inner support 12 with a rectangular structure inside the tube seat 13. The tailstock 9 is used in conjunction with the indexing head 15, and provides support for the tube seat 13 during machining. The tailstock 9 is equipped with a freely retractable center point 10, which clamps the center of the left end face of the inner support 12. The indexing head 15 is equipped with a chuck 14 that clamps and fixes the right end of the inner support 12. The chuck 14 can rotate to precisely position the machining angle. When fixing the inner support 12, both the center point 10 and the chuck 14 should first be positioned at the center of their two end faces before tightening.

[0019] The inner support 12 is made of metal, and its hardness and wear resistance are improved through heat treatment. The inner support 12 has a rectangular structure and inserts into the inner hole of the tube seat 13 to provide support and fixation. On the left side of the inner support 12, a stop block 11 is pressed against by a nut 17 to fix and tighten the tube seat 13. The size of the stop block 11 is slightly smaller than the outer dimensions of the left end face of the tube seat 13, which can prevent interference with the cutting tool during machining. A positioning structure is provided at the right end of the inner support 12, which positions the tube seat 13 by pressing against the right end. The outer dimensions of the positioning structure are larger than the inner hole of the tube seat 13 but slightly smaller than the milling dimensions of the tube seat 13, preventing interference with the cutting tool during machining.

[0020] The tube seat 13 is a product processed using this utility model. The tube seat 13 is made of metal, specifically aluminum alloy, and has a rectangular internal hole and external shape. During processing, after the inner support 12 is inserted into the tube seat 13, the stop block 11 is installed to fix the tube seat 13, and then the center 10 is tightened to fix the tooling. When processing each structure of the tube seat 13, the outer plane 1 of the large end, the side plate fixing surface 2, the outer plane 5 of the small end, the water channel 6, the chamfered edge 3, and the chamfered edge 4 need to be processed sequentially. After processing one side of the tube seat 13, it is rotated, and then the second side is processed, and so on, completing the processing of all four sides of the tube seat 13.

[0021] It should be noted that the combination of the technical features in the embodiments of this utility model is not limited to the combination methods recorded in the embodiments of this utility model or the combination methods recorded in specific embodiments. All technical features recorded in this utility model can be freely combined or combined in any way, unless there is a contradiction between them.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A processing apparatus for plate-type nuclear fuel element sockets, characterized in that, The device includes: a tailstock (9), an indexing head (15), and an inner support (12) for a tube seat (13) fixedly mounted on a machine tool worktable (16); the tailstock (9) is provided with a freely retractable tip (10), which presses against the center of the left end face of the inner support (12); the indexing head (15) is provided with a chuck (14) for clamping and fixing the right end of the inner support (12); the inner support (12) can support and fix the tube seat (13), and the left side of the inner support (12) is fixed and pressed against the tube seat (13) by a stop block (11) pressed by a nut (17).

2. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, When fixing the inner support (12), the tip (10) and the claw (14) first locate the center of their two end faces before tightening.

3. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, The size of the stop (11) is slightly smaller than the outer dimensions of the left end face of the tube seat (13) to avoid interference with the cutting tool during the machining process.

4. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, The inner support (12) inside the tube seat (13) is a rectangular structure.

5. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, The inner support (12) has a positioning structure on the right end, which is positioned by pressing against the right end of the tube seat (13).

6. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, The jaws (14) on the indexing head (15) can rotate to precisely position the machining angle.

7. The apparatus for processing plate-type nuclear fuel element sockets according to claim 1, characterized in that, When processing each structure of the tube seat (13), the outer plane (1) of the large end, the fixed surface of the side plate (2), the outer plane (5) of the small end, the water channel (6), the chamfer (3) and the chamfer (4) of the bevel are processed in sequence. After processing one side of the tube seat (13), it is rotated and then the second side is processed. The processing of the four sides of the tube seat (13) is completed in sequence.

Images