CN211727037U - Appearance trimming device of fuel assembly spacer grid cell - Google Patents
Appearance trimming device of fuel assembly spacer grid cell Download PDFInfo
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- CN211727037U CN211727037U CN201922417597.0U CN201922417597U CN211727037U CN 211727037 U CN211727037 U CN 211727037U CN 201922417597 U CN201922417597 U CN 201922417597U CN 211727037 U CN211727037 U CN 211727037U
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- clamp plate
- lower extreme
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Abstract
The utility model provides an appearance trimming device of fuel assembly spacer grid cell, includes the plastic frame, and plastic frame four corners circular arc corresponds with pipe class product four corners circular arc outline, and the outer arris inclined plane of plastic frame contacts with the inside inclined plane of upper end clamp plate and lower extreme clamp plate, and the plastic inside casing has been placed to the inner chamber of plastic frame, and upper end plastic core is installed on the upper end clamp plate, and lower extreme plastic core is installed on the lower extreme clamp plate, and the adjustment cushion contacts with upper end plastic core and lower extreme plastic core respectively.
Description
Technical Field
The invention relates to the field of nuclear fuel element manufacturing, in particular to a shape trimming device for a fuel assembly positioning grid cell.
Background
The grid cells of the positioning grid in the nuclear fuel assembly belong to thin-wall square tubular structures, a plurality of planes and arc surfaces are symmetrically processed on a thin-wall arc, the accuracy requirements of the characteristic structures are high, and the requirements of large-scale production are met. The spacer grid cell adopts the punching technology to punch the round tube into the square tube, because the die punch of the spacer grid cell has loss phenomenon in the manufacturing process, and the punching deformation generated at the same time is different, the contour dimension characteristics of four circular arcs at four planes and four corners at the upper end of the cell after part of the cell is punched are out to be over-poor, the technical condition requirements are not met, in order to improve the utilization rate of raw materials and ensure the manufacturing quality of the cell, the over-poor spacer grid cell is trimmed to meet the technical index requirements, so a special shape trimming device is designed by self and a trimming method is established to solve the problem.
Disclosure of Invention
The invention aims to: by designing and manufacturing a special grid cell shape trimming device and establishing a shape contour trimming method, the utilization rate of raw materials is improved, and the trimmed grid cell shape contour characteristics meet the requirements of technical conditions.
The technical scheme of the invention is as follows: the utility model provides an appearance trimming device of fuel assembly spacer grid cell, includes the plastic frame, and plastic frame four corners circular arc corresponds with pipe class product four corners circular arc outline, and the outer arris inclined plane of plastic frame contacts with the inside inclined plane of upper end clamp plate and lower extreme clamp plate, and the plastic inside casing has been placed to the inner chamber of plastic frame, and upper end plastic core is installed on the upper end clamp plate, and lower extreme plastic core is installed on the lower extreme clamp plate, and the adjustment cushion contacts with upper end plastic core and lower extreme plastic core respectively.
The upper end and the lower end of the shaping outer frame are of conical surface structures.
The upper shaping core and the lower shaping core have certain taper, so that the outer contour of the shaping inner frame is tightly attached to the inner contour of the grid element.
The adjusting cushion block is used for adjusting the positions of the upper shaping core and the lower shaping core.
The invention has the following remarkable effects:
by adopting the appearance trimming device and the applicable trimming method, the utilization rate of raw materials is effectively improved.
The die punch of the grid cell of the positioning grid has a loss phenomenon in the manufacturing process, and the punching deformation generated at the same time is different, so that the outline size characteristics of four circular arcs at four planes and four corners at the upper end of the grid cell are scrapped out of tolerance after part of grid cells are punched, the quality cannot be effectively controlled, and the grid cell pipe of the positioning grid can be ensured to completely meet the requirements of drawings and technical conditions by adopting an appearance finishing device and an applicable finishing method.
Drawings
FIG. 1 is a front view of a contouring assembly for a spacer grid cell of a fuel assembly;
FIG. 2 is a schematic view of a shaping frame
In the figure: shaping outer frame 1, upper end shaping core 2, lower end shaping core 3, upper end pressing plate 4, lower end pressing plate 5, adjusting cushion block 6, shaping inner frame 7 and pipe product 8
Detailed Description
The utility model provides an appearance trimming device of fuel assembly spacer grid cell, includes plastic frame 1, and the circular arc of 1 four corners of plastic frame corresponds with 8 four corners circular arcs of pipe class product outline, and the upper end and the lower extreme design of plastic frame 1 are the conical surface structure, mainly make the vertical motion direction change into the horizontal motion direction. The upper shaping core 2 and the lower shaping core 3 are designed to have certain taper, and mainly make the outer contour of the shaping inner frame tightly attached to the inner contour of the grid cell. The inner cavities of the upper end pressing plate 4 and the lower end pressing plate 5 are designed to be conical surface structures matched with the upper end and the lower end of the shaping outer frame 1, so that the shaping outer frame 1 can move horizontally.
The outer edge inclined plane of plastic frame 1 contacts with the inside inclined plane of upper end clamp plate 4 and lower extreme clamp plate 5, and plastic inside casing 7 has been placed to the inner chamber of plastic frame 1, and upper end plastic core 2 is installed on upper end clamp plate 4, and lower extreme plastic core 3 is installed on lower extreme clamp plate 5, and adjustment cushion 6 contacts with upper end plastic core 2 and lower extreme plastic core 3 respectively. The adjusting cushion block 6 is used for adjusting the positions of the upper shaping core 2 and the lower shaping core 3.
Claims (4)
1. A fuel assembly spacer grid cell contouring device, comprising: including plastic frame (1), plastic frame (1) four corners circular arc corresponds with pipe class product (8) four corners circular arc outline, the outer arris inclined plane of plastic frame (1) contacts with the inside inclined plane of upper end clamp plate (4) and lower extreme clamp plate (5), plastic inside casing (7) have been placed to the inner chamber of plastic frame (1), upper end plastic core (2) are installed on upper end clamp plate (4), lower extreme plastic core (3) are installed on lower extreme clamp plate (5), adjustment cushion (6) contact with upper end plastic core (2) and lower extreme plastic core (3) respectively.
2. The apparatus of claim 1 wherein the fuel assembly spacer grid cell contouring device comprises: the upper end and the lower end of the shaping outer frame (1) are of conical surface structures.
3. The apparatus of claim 2 wherein the fuel assembly spacer grid cell contouring device comprises: the upper shaping core (2) and the lower shaping core (3) have certain taper, so that the outer contour of the shaping inner frame is tightly attached to the inner contour of the grid element.
4. The apparatus of claim 1 wherein the fuel assembly spacer grid cell contouring device comprises: the adjusting cushion block (6) is used for adjusting the positions of the upper shaping core (2) and the lower shaping core (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417597.0U CN211727037U (en) | 2019-12-26 | 2019-12-26 | Appearance trimming device of fuel assembly spacer grid cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922417597.0U CN211727037U (en) | 2019-12-26 | 2019-12-26 | Appearance trimming device of fuel assembly spacer grid cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211727037U true CN211727037U (en) | 2020-10-23 |
Family
ID=72871572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922417597.0U Active CN211727037U (en) | 2019-12-26 | 2019-12-26 | Appearance trimming device of fuel assembly spacer grid cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211727037U (en) |
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2019
- 2019-12-26 CN CN201922417597.0U patent/CN211727037U/en active Active
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