CN211759450U - Upper tube base connecting plate and frame plate fixed-position welding anchor clamps - Google Patents
Upper tube base connecting plate and frame plate fixed-position welding anchor clamps Download PDFInfo
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- CN211759450U CN211759450U CN201922153993.7U CN201922153993U CN211759450U CN 211759450 U CN211759450 U CN 211759450U CN 201922153993 U CN201922153993 U CN 201922153993U CN 211759450 U CN211759450 U CN 211759450U
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Abstract
The invention discloses a positioning welding fixture for an upper pipe seat connecting plate and a frame plate, which comprises a bottom plate, a positioning pin column, a fixing pin, a pressing plate, a screwing nut, a supporting leg and an inner hexagonal cylinder screw. The invention has the beneficial effects that: by using the clamp, the centrosymmetric error of the two parts can be ensured to be less than 0.05mm after the positioning welding of the upper tube seat is finished, and the longitudinal and transverse welding deformation of the welding line is reasonable and controllable. Thereby increasing the one-time yield, reducing the waste of materials, personnel and economy and having good economic value.
Description
Technical Field
The invention belongs to the field of nuclear fuel part manufacturing, and particularly relates to a positioning welding clamp for an upper pipe base connecting plate and a frame plate.
Background
The upper tube seats of the CF2 and the CF3 are one of key components of the Hualong No. 1 nuclear fuel assembly, and have irreplaceable functions of positioning the core position of the fuel assembly, restraining and positioning a framework, hoisting an assembly interface and the like. Because the welding seam of the upper pipe seat connecting plate and the frame plate needs to bear the pre-tightening resistance in the reactor of the assembly, the fluid scouring shear force of the box-shaped inner cavity, the thermal cycle internal stress and the irradiation creep stress of the reactor core, the requirements of the technical conditions on the strength, the intergranular corrosion resistance, the stress corrosion resistance and the irradiation creep performance of the welding seam of the upper pipe seat are very high. The thickness of the welding joint of the connecting plate and the frame plate is different, welding penetration is not allowed, the requirement of the fusion depth size tolerance is controlled to be about 0.3mm, the requirement of the welding longitudinal and transverse deformation is controlled to be within 0.5mm, and the welding difficulty is very high.
In the prior art, only careful welding can be performed, and then a qualified product with good quality is selected from finished products, so that time and labor are wasted, and a large amount of time and money are wasted.
Disclosure of Invention
The invention aims to provide a positioning welding fixture for an upper pipe seat connecting plate and a frame plate, which can effectively simplify the assembly difficulty of an upper pipe seat, improve the positioning welding precision, inhibit welding deformation and improve the positioning welding quality.
The technical scheme of the invention is as follows: the utility model provides an upper tube base connecting plate and frame plate fixed-position welding anchor clamps, it includes bottom plate, locating pin post, locating pin, clamp plate, screws up nut, landing leg, hexagon socket head cap screw, the landing leg setting on the bottom plate, the bottom plate is inserted to the one end of locating pin and locating pin post area screw hole, passes through the fix with screw at the bottom plate opposite side, the clamp plate pushes down the tube socket after penetrating the locating pin post, screws up the nut and twists behind the double-screw bolt of locating pin post head and compresses tightly the clamp plate.
The supporting legs are directly arranged on the bottom plate through threads.
The bottom plate be square structure, 2 central round holes are used for subtracting the heavy and eliminating welding thermal stress concentration on the bottom plate, 4 equipartition screw thread blind holes are used for installing the landing leg, 6 shoulder holes are used for accurate positioning locating pin and locating pin post.
The positioning pin column is of a circular stepped pin column structure, the bottom of the positioning pin column is provided with a fixing threaded hole, and the top of the positioning pin column is provided with a positioning pin and a screw rod.
The positioning pin is of a circular stepped pin column structure, the bottom of the positioning pin is provided with a fixing threaded hole, and the top of the positioning pin is provided with a positioning pin.
The clamp plate is a special-shaped structural part, the special-shaped structure is convenient to install, fix and radiate a welding part, and stepped holes are arranged on four sides of the clamp plate for auxiliary positioning.
The tightening nut is of a shaft structure, an internal threaded hole is used for tightening the bolt to fix a welding part, anti-skid lines are arranged on the outer side of the tightening nut to facilitate tightening operation, and the lower stepped shaft is used for assisting positioning.
The invention has the beneficial effects that: by using the clamp, the centrosymmetric error of the two parts can be ensured to be less than 0.05mm after the positioning welding of the upper tube seat is finished, and the longitudinal and transverse welding deformation of the welding line is reasonable and controllable. Thereby increasing the one-time yield, reducing the waste of materials, personnel and economy and having good economic value.
Drawings
FIG. 1 is a schematic view of a positioning and welding fixture for an upper tube seat connecting plate and a frame plate according to the present invention;
FIG. 2 is a schematic diagram of a positioning and welding fixture for an upper tube seat connecting plate and a frame plate according to the present invention.
In the figure: the structure comprises a base plate 1, positioning pin columns 2, positioning pins 3, a pressing plate 4, a screwing nut 5, supporting legs 6, hexagon socket head cap screws 7, frame plates 8 and connecting plates 9.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in figure 1, the positioning welding clamp for the upper pipe base connecting plate and the frame plate comprises a bottom plate 1, a positioning pin column 2, a positioning pin 3, a pressing plate 4, a screwing nut 5, a supporting leg 6 and an inner hexagonal cylinder screw 7. Wherein the supporting legs 6 are directly arranged on the bottom plate 1 through threads; one end of the positioning pin 3 and one end of the positioning pin column 2 with threaded holes are inserted into the bottom plate 1, and standard screws are screwed into the other side of the bottom plate 1 for fixing. The frame plate 8 is arranged on the positioning pin 3, and the connecting plate 9 is arranged on the positioning pin column 2, so that accurate positioning is realized; the pressing plate 4 presses the tube seat after penetrating into the positioning pin column 2, and the tightening nut 5 is screwed into the stud at the head of the positioning pin column 2 to tightly press the pressing plate 4, so that the tube seat is rigidly fixed.
Wherein the frame plate 8 and the connection plate 9 are welded together by means of the inventive tool.
The bottom plate 1 is of a square structure, a central round hole is used for reducing weight and eliminating welding thermal stress concentration, 4 uniformly distributed threaded blind holes are used for mounting supporting legs, and 6 stepped holes are used for accurately positioning pins and positioning pin columns.
The positioning pin column 2 is of a circular stepped pin column structure, the bottom of the positioning pin column is provided with a fixing threaded hole, and the top of the positioning pin column is provided with a positioning pin 3 and a screw rod which are used for positioning a connecting plate.
The positioning pin 3 is of a circular stepped pin column structure, the bottom of the positioning pin is provided with a fixing threaded hole, and the top of the positioning pin is provided with a positioning pin and used for positioning the frame plate.
The pressing plate 4 is a special-shaped structural part, the special-shaped structure is convenient to install, fix and radiate a welding part, and stepped holes are arranged on four sides of the special-shaped structure and used for auxiliary positioning.
The tightening nut 5 is of a shaft structure, an internal threaded hole is used for tightening a bolt to fix a welding part, anti-skid lines are arranged on the outer side of the tightening nut to facilitate tightening operation, and a stepped shaft at the lower end of the tightening nut is used for assisting positioning.
The use mode of the invention is as follows:
before assembly, firstly taking down the pressing block and screwing the nut, and reserving an assembly space; then the frame plate penetrates into the positioning pin and is tightly attached to the bottom plate; then the connecting plate penetrates into the positioning pin column and is tightly attached to the frame plate; then the pressing plate penetrates into the positioning pin column and is tightly attached to the connecting plate; and finally, screwing the nut to the positioning pin column screw and attaching the nut to the stepped hole of the compression plate. And welding the welding seam after the product is fixed.
Claims (7)
1. The utility model provides an upper tube base connecting plate and framed panel fixed-position welding anchor clamps which characterized in that: the novel positioning pin comprises a base plate (1), a positioning pin column (2), a positioning pin (3), a pressing plate (4), a screwing nut (5), a supporting leg (6) and an inner hexagonal cylindrical screw (7), wherein the supporting leg (6) is arranged on the base plate (1), one end of the threaded hole of the positioning pin column (3) and one end of the threaded hole of the positioning pin column (2) are inserted into the base plate (1), the other side of the base plate (1) is fixed through screws, the pressing plate (4) penetrates through the positioning pin column (2) and presses a tube seat, and the screwing nut (5) screws into the double-screw bolt at the head of the positioning pin column (2) and then compresses the.
2. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the supporting legs (6) are directly arranged on the bottom plate (1) through threads.
3. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the bottom plate (1) be square structure, 2 central round holes are used for subtracting the heavy and eliminating the welding thermal stress concentration on bottom plate (1), 4 equipartition screw thread blind holes are used for installing the landing leg, 6 shoulder holes are used for accurate positioning locating pin (3) and locating pin post (2).
4. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the positioning pin column (2) is of a circular stepped pin column structure, the bottom of the positioning pin column is provided with a fixing threaded hole, and the top of the positioning pin column is provided with a positioning pin (3) and a screw rod.
5. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the positioning pin (3) is of a circular stepped pin column structure, the bottom of the positioning pin is provided with a fixing threaded hole, and the top of the positioning pin is provided with a positioning pin.
6. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the pressing plate (4) is a special-shaped structural part, the special-shaped structure is convenient to install, fix and radiate a welding part, and stepped holes are arranged on four sides of the special-shaped structure and used for auxiliary positioning.
7. The upper tube seat connecting plate and frame plate fixed-position welding fixture of claim 1, wherein: the tightening nut (5) is of a shaft structure, an internal threaded hole is used for tightening the bolt to fix a welding part, anti-skid lines are arranged on the outer side of the bolt to facilitate tightening operation, and the lower-end stepped shaft is used for assisting positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153993.7U CN211759450U (en) | 2019-12-05 | 2019-12-05 | Upper tube base connecting plate and frame plate fixed-position welding anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153993.7U CN211759450U (en) | 2019-12-05 | 2019-12-05 | Upper tube base connecting plate and frame plate fixed-position welding anchor clamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211759450U true CN211759450U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922153993.7U Active CN211759450U (en) | 2019-12-05 | 2019-12-05 | Upper tube base connecting plate and frame plate fixed-position welding anchor clamps |
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| CN (1) | CN211759450U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114603297A (en) * | 2020-12-09 | 2022-06-10 | 中核建中核燃料元件有限公司 | Assembly welding fixture for upper pipe seat of fuel assembly structure without positioning table |
| CN114603295A (en) * | 2020-12-09 | 2022-06-10 | 中核建中核燃料元件有限公司 | Assembly welding fixture for lower pipe base of fuel assembly structure without positioning table |
-
2019
- 2019-12-05 CN CN201922153993.7U patent/CN211759450U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114603297A (en) * | 2020-12-09 | 2022-06-10 | 中核建中核燃料元件有限公司 | Assembly welding fixture for upper pipe seat of fuel assembly structure without positioning table |
| CN114603295A (en) * | 2020-12-09 | 2022-06-10 | 中核建中核燃料元件有限公司 | Assembly welding fixture for lower pipe base of fuel assembly structure without positioning table |
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