CN215317074U - R fixed length clamp for spring milling of tube mounting plate of fuel assembly - Google Patents
R fixed length clamp for spring milling of tube mounting plate of fuel assembly Download PDFInfo
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- CN215317074U CN215317074U CN202022883074.8U CN202022883074U CN215317074U CN 215317074 U CN215317074 U CN 215317074U CN 202022883074 U CN202022883074 U CN 202022883074U CN 215317074 U CN215317074 U CN 215317074U
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Abstract
The utility model particularly relates to a R-shaped fixed-length clamp for spring milling of a tube seat plate on a fuel assembly, which comprises a bottom plate, wherein a plurality of grooves with two through ends in the length direction are arranged on the bottom plate, and every two adjacent grooves are detachably connected with a pressing plate through a connecting piece; when the pressing plate is perpendicular to the two adjacent grooves, the pressing plate can be respectively pressed on two non-adjacent side walls of the two adjacent grooves; when the pressing plate is parallel to the two adjacent grooves, the side face of the pressing plate is in contact with the two adjacent side walls of the two adjacent grooves. The R-shaped fixed length milling clamp for the tube seat plate spring of the fuel assembly is compatible with R-shaped fixed length milling process machining of a pressing plate spring and a supporting plate spring, and is convenient to operate; the production line fully considers the factors of batch production, production change, cutters and the like, improves the production efficiency, reduces the waste of cutters, personnel and economy, has good economic value and is suitable for batch production.
Description
Technical Field
The utility model belongs to the technical field of nuclear fuel part manufacturing, and particularly relates to an R-shaped fixed-length clamp for milling a spring of an upper pipe seat plate of a fuel assembly.
Background
The fuel assembly upper tube plate spring is one of the important components of the upper tube plate assembly, and the main function is to provide proper pressing force to keep the fuel assembly pressed on the upper surface of the lower core support plate in the reactor operation and prevent the assembly from jumping to damage the fuel assembly caused by water flow scouring.
The tube seat plate spring on the fuel assembly consists of a pressure plate spring and 3 supporting plate springs. The left end of the pressure plate spring is provided with a hole with the diameter R, and the orifice and the right end of the pressure plate spring are both provided with chamfers. The left end of the support plate spring is provided with a hole with the diameter R, and the right end of the support plate spring is provided with a pre-hole. The length of the pressing plate spring is far greater than that of the supporting plate spring, and the lengths of the 3 supporting plate springs are slightly different. The pressing plate spring and the supporting plate spring are both obtained by milling R fixed length processing of plates with certain width and thickness. In the R-milling fixed-length machining process, the plate to be machined needs to be subjected to clamp operation, so that the machining operation is facilitated. Milling R fixed length manufacturing procedure is higher to hole position tolerance requirement, and four kinds of leaf spring length are different moreover, and work piece is in large quantity, and the vice that uses among the prior art can not satisfy tube seat board spring size and geometric tolerances accuracy requirement on the fuel assembly to machining efficiency is low, and intensity of labour is big, is unfavorable for the batch production of work piece.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a fuel assembly top tube bedplate spring mills R fixed length anchor clamps to the problem that the vice can not satisfy the requirement of fuel assembly top tube bedplate spring mill R fixed length process to size and form and position tolerance precision and batch production to satisfy fuel assembly top tube bedplate spring size and form and position tolerance precision requirement, compatible pressure strip spring and backup pad spring realize the mass production of work piece simultaneously.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a fuel assembly top tube base plate spring milling R fixed length clamp comprises a bottom plate, wherein a plurality of grooves with two through ends in the length direction are formed in the bottom plate, and a pressing plate is detachably connected between every two adjacent grooves through a connecting piece; when the pressing plate is perpendicular to the two adjacent grooves, the pressing plate can be respectively pressed on two non-adjacent side walls of the two adjacent grooves; when the pressing plate is parallel to the two adjacent grooves, the side face of the pressing plate is in contact with the two adjacent side walls of the two adjacent grooves.
Further, the width of the groove is 0.03mm larger than that of the plate spring.
Further, the depth of the groove is smaller than the thickness of the plate spring by 0.55 mm.
Further, the parallelism of the length direction of the groove relative to the horizontal direction is not more than 0.03 mm.
Further, all the grooves are coplanar and have a flatness of not more than 0.025mm and a parallelism with respect to the bottom surface of not more than 0.03 mm.
The working principle is as follows: the workpiece to be processed is placed in the groove, the workpiece is accurately positioned by the lower side edge of the groove in the vertical direction, the workpiece is roughly positioned by the workpiece and the leftmost end surface of the clamp in a parallel and level mode, then the pressing plate is fixed through the connecting piece, the pressing plate is perpendicular to the groove, the pressing plate presses on the workpiece, and the workpiece is clamped in the groove.
Furthermore, the grooves are arranged on the bottom plate at equal intervals.
Further, the distance between every two adjacent grooves is 38 mm.
Furthermore, three pressing plates are detachably connected between every two grooves from left to right through connecting pieces, the distance between the pressing plate on the left side and the pressing plate in the middle is 95mm, and the pressing plates are used for fixing a workpiece for processing the supporting plate spring; the distance between the left pressing plate and the right pressing plate is 165mm, and the left pressing plate and the right pressing plate are used for fixing a workpiece for machining the pressing plate spring.
Furthermore, the connecting piece comprises at least one bolt, threaded holes matched with the bolt are respectively formed in the pressing plate and the bottom plate, the threaded holes in the pressing plate are formed in the center of the pressing plate, and the threaded holes in the bottom plate are located in the position, right below the threaded holes in the pressing plate, on the bottom plate.
Furthermore, 12mm deep cutter back-off grooves are formed in the bottom plate in the vertical direction of the cutting track of the cutter
Furthermore, the bottom plate is also provided with a positioning screw mounting hole for positioning the clamp and a common screw mounting hole for fixing the clamp.
Furthermore, the bottom plate is provided with 10 grooves with two through ends in the length direction.
Furthermore, the bottom plate is also provided with 2 positioning screw mounting holes for positioning the clamp and 4 common screw mounting holes for fixing the clamp.
The utility model has the following beneficial effects:
the R-shaped fixed length milling clamp for the tube seat plate spring of the fuel assembly is compatible with R-shaped fixed length milling process machining of a pressing plate spring and a supporting plate spring, and is convenient to operate; the production line fully considers the factors of batch production, production change, cutters and the like, improves the production efficiency, reduces the waste of cutters, personnel and economy, has good economic value and is suitable for batch production.
Drawings
FIG. 1 is a schematic diagram of a milling R fixed-length processing procedure of a compression plate spring of an upper tube seat of a fuel assembly;
FIG. 2 is a schematic view of a milling R fixed-length processing procedure of a support plate spring of an upper tube seat of a fuel assembly;
FIG. 3 is a schematic structural view of a top view of a fuel assembly upper tube seat plate spring milling R fixed length clamp in a clamping state;
FIG. 4 is a schematic structural view of a cross section of a fuel assembly upper tube seat plate spring milling R fixed-length clamp in the AA direction in a clamping state;
FIG. 5 is a schematic side view of a fuel assembly upper tube seat plate spring milling R fixed length clamp in a clamping state;
FIG. 6 is a perspective view of a fuel assembly upper tube seat plate spring milling R fixed length clamp in a clamping state;
fig. 7 is a schematic structural view of a cross section in the direction of an AA of a fuel assembly upper tube seat plate spring milling R fixed-length clamp in a milling R fixed-length machining state;
fig. 8 is a schematic structural view of a fuel assembly upper tube seat plate spring milling R fixed-length clamp in a milling R fixed-length machining state.
Wherein:
1. a base plate; 2. pressing a plate; 3. a connecting member; 4. positioning the bolt; 5. a pressure plate spring; 6. a support plate spring; 7. a cutter; 8. let the sword groove.
Detailed Description
A fuel assembly top tube base plate spring milling R fixed length clamp comprises a bottom plate 1, wherein a plurality of grooves with two through ends in the length direction are formed in the bottom plate 1, and a pressing plate 2 is detachably connected between every two adjacent grooves through a connecting piece 3; when the pressing plate 2 is perpendicular to the two adjacent grooves, the pressing plate can be respectively pressed on two non-adjacent side walls of the two adjacent grooves; when the pressing plate 2 is parallel to the two adjacent grooves, the side surface of the pressing plate 2 is in contact with two adjacent side walls of the two adjacent grooves.
Further, the width of the groove is
Further, the depth of the groove is 3.2mm (the thickness of a tube seat plate spring on the fuel assembly is 3.75mm), and the pressing plate 2 is guaranteed to be pressed on a workpiece when being pressed downwards.
Further, the parallelism of the length direction of the groove relative to the horizontal direction is not more than 0.03 mm.
Further, all the grooves are coplanar and have a flatness of not more than 0.025mm and a parallelism with respect to the bottom surface of not more than 0.03 mm.
The working principle is as follows: a workpiece to be processed is placed in the groove, the workpiece is accurately positioned by the lower side edge of the groove in the vertical direction, the workpiece is roughly positioned by the workpiece and the leftmost end surface of the clamp in a parallel and level mode, then the pressing plate 2 is fixed through the connecting piece 3, the pressing plate 2 is perpendicular to the groove, the pressing plate 2 is pressed on the workpiece, and the workpiece 2 is clamped in the groove.
Further, the grooves are arranged on the bottom plate 1 at equal intervals.
Further, the distance between every two adjacent grooves is 38 mm.
Furthermore, three pressing plates 2 are detachably connected between every two grooves from left to right through connecting pieces 3, the distance between the pressing plate 2 on the left side and the pressing plate 2 in the middle is 95mm, and the pressing plates are used for fixing a workpiece for processing a supporting plate spring; the distance between the left pressing plate 2 and the right pressing plate 2 is 165mm, and the left pressing plate 2 and the right pressing plate 2 are used for fixing a workpiece for machining the pressing plate spring.
Furthermore, the connecting piece 3 comprises at least one bolt, threaded holes matched with the bolt are respectively formed in the pressing plate 2 and the base plate 1, the threaded hole in the pressing plate 2 is formed in the center of the pressing plate 2, and the threaded hole in the base plate 1 is located on the base plate 1 and is located right below the threaded hole in the pressing plate 2.
Furthermore, 12mm deep cutter back-off grooves 8 are formed in the bottom plate 1 in the vertical direction of the cutting track of the cutter 7. The thickness of the tube seat plate spring on the fuel assembly is 3.75mm, and the length of the knife can be modified by 4mm (3 times) after the knife 7 reaches the wear limit each time, so that the effect of fully utilizing the knife 7 is achieved, namely 1 knife is equivalent to 4 knives.
Furthermore, the bottom plate 1 is also provided with a positioning screw mounting hole for positioning a clamp and a common screw mounting hole for fixing the clamp.
Furthermore, the bottom plate 1 is provided with 10 grooves with two through ends in the length direction.
Furthermore, the bottom plate is also provided with 2 positioning screw mounting holes for positioning the clamp and 4 common screw mounting holes for fixing the clamp.
When the R-shaped fixed length clamp for the spring mill of the upper tube base plate of the fuel assembly is used, the R-shaped fixed length clamp for the spring mill of the upper tube base plate of the fuel assembly is installed on a base plate of a machine tool through the positioning screws 4, alignment is needed for the first time, alignment is not needed during secondary clamping during production change, and production can be rapidly put into production.
When the pressing plate springs 5 are machined, the pressing plate 2 in the middle between every two grooves is transversely fixed, workpieces for machining the pressing plate springs 5 are placed in the grooves, the pressing plate 2 on the left side and the pressing plate 2 on the right side between every two grooves are used for pressing and fixing the workpieces in a natural state, and one set of clamp can clamp 10 workpieces at a time.
When the supporting plate spring 6 is machined, the pressing plate 2 on the right side between every two grooves does not need to be detached or fixed, a workpiece for machining the supporting plate spring 6 is placed in the grooves, the pressing plate 2 on the left side between every two grooves and the pressing plate 2 in the middle are pressed to fix the workpiece in a natural state, and one set of clamp can clamp 10 pieces at a time.
The vertical direction of the cutting track of the cutter 7 on the bottom plate 1 is provided with a cutter relieving groove 8 with the depth of 12mm, and the cutter length can be modified by 4mm (3 times) after the cutter 7 reaches the wear limit each time.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A fuel assembly top tube base plate spring milling R fixed length clamp is characterized by comprising a bottom plate, wherein a plurality of grooves with two through ends in the length direction are formed in the bottom plate, and a pressing plate is detachably connected between every two adjacent grooves through a connecting piece; when the pressing plate is perpendicular to the two adjacent grooves, the pressing plate can be respectively pressed on two non-adjacent side walls of the two adjacent grooves; when the pressing plate is parallel to the two adjacent grooves, the side face of the pressing plate is in contact with the two adjacent side walls of the two adjacent grooves.
2. A fuel assembly tube seat plate spring milling R length fixing clamp as claimed in claim 1, wherein the width of the groove is 0.03mm larger than the width of the plate spring, the depth of the groove is 0.55mm smaller than the thickness of the plate spring, and the parallelism of the length direction of the groove relative to the horizontal direction is not more than 0.03 mm.
3. The R-clamp of claim 1, wherein all of the grooves are coplanar and have a flatness of no more than 0.025mm and a parallelism relative to the bottom surface of no more than 0.03 mm.
4. The R-clamp for a tube seat plate spring mill on a fuel assembly according to any one of claims 1-3, wherein the plurality of grooves are equally spaced on the bottom plate.
5. The R-clamp for tube seat plate spring milling of fuel assembly as claimed in claim 4, wherein the distance between every two adjacent grooves is 38 mm.
6. The R-shaped length-fixing clamp for the tube seat plate spring mill on the fuel assembly according to any one of claims 1-3, wherein three pressure plates are detachably connected between every two grooves from left to right through connectors, and the distance between the pressure plate on the left side and the pressure plate in the middle is 95 mm; the distance between the left pressing plate and the right pressing plate is 165 mm.
7. The R-length fixing clamp for a tube mounting plate spring mill on a fuel assembly as claimed in claim 1, wherein the connecting member comprises at least one bolt, the pressing plate and the bottom plate are respectively provided with a threaded hole matched with the bolt, the threaded hole on the pressing plate is arranged at the center of the pressing plate, and the threaded hole on the bottom plate is arranged at a position right below the threaded hole on the pressing plate on the bottom plate.
8. The R-length fixing clamp for a tube seat plate spring mill on a fuel assembly as claimed in claim 1, wherein a 12mm deep cutter back-off groove is formed in the bottom plate in a direction perpendicular to a cutting track of a cutter.
9. The R-length fixing clamp for a tube seat plate spring mill on a fuel assembly as claimed in claim 1, wherein a positioning screw mounting hole and a common screw mounting hole are further formed on the bottom plate.
10. The R-length fixing clamp for a tube seat plate spring mill on a fuel assembly as claimed in claim 1, wherein the bottom plate is provided with not less than 2 grooves with two ends penetrating in the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022883074.8U CN215317074U (en) | 2020-12-04 | 2020-12-04 | R fixed length clamp for spring milling of tube mounting plate of fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022883074.8U CN215317074U (en) | 2020-12-04 | 2020-12-04 | R fixed length clamp for spring milling of tube mounting plate of fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215317074U true CN215317074U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022883074.8U Active CN215317074U (en) | 2020-12-04 | 2020-12-04 | R fixed length clamp for spring milling of tube mounting plate of fuel assembly |
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| CN (1) | CN215317074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548624A (en) * | 2020-12-04 | 2021-03-26 | 中核建中核燃料元件有限公司 | R fixed length clamp for spring milling of tube mounting plate of fuel assembly |
-
2020
- 2020-12-04 CN CN202022883074.8U patent/CN215317074U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548624A (en) * | 2020-12-04 | 2021-03-26 | 中核建中核燃料元件有限公司 | R fixed length clamp for spring milling of tube mounting plate of fuel assembly |
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