CN116511689A - Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece - Google Patents

Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece Download PDF

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Publication number
CN116511689A
CN116511689A CN202310218656.XA CN202310218656A CN116511689A CN 116511689 A CN116511689 A CN 116511689A CN 202310218656 A CN202310218656 A CN 202310218656A CN 116511689 A CN116511689 A CN 116511689A
Authority
CN
China
Prior art keywords
capsule
hemispherical
sheath
hot isostatic
diffusion welding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310218656.XA
Other languages
Chinese (zh)
Inventor
唐江科
钟轶强
王海龙
陈义武
王悦
秦美勋
王泽杰
王新鹏
孟树文
程元芬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
404 Co Ltd China National Nuclear Corp
Original Assignee
404 Co Ltd China National Nuclear Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 404 Co Ltd China National Nuclear Corp filed Critical 404 Co Ltd China National Nuclear Corp
Priority to CN202310218656.XA priority Critical patent/CN116511689A/en
Publication of CN116511689A publication Critical patent/CN116511689A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/26—Auxiliary equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
    • B23K20/021—Isostatic pressure welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
    • B23K20/023—Thermo-compression bonding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention provides a sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpieces, which comprises an inner sheath, an outer sheath and an exhaust pipe, wherein the inner sheath can be embedded into the outer sheath to form a cavity for accommodating hemispherical shell workpieces to be welded, and the side wall of the inner sheath is connected with the exhaust pipe. When two hemispherical shell-shaped workpieces to be welded are welded, precise connection can be realized, and the connection strength is high. The other surfaces of the welded workpiece are not adhered to the sheath, so that the welded workpiece can be easily removed, the removed surface is good, and secondary processing is not needed.

Description

Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece
Technical Field
The invention relates to the technical field of hot isostatic pressure diffusion welding, in particular to a sheath device for hot isostatic pressure diffusion welding of a hemispherical shell workpiece.
Background
The traditional welding mode is difficult to realize precise connection between two hemispherical shell workpieces. The hot isostatic pressing diffusion welding is to seal the materials to be connected in the sheath, and uniformly apply high-temperature and high-pressure gas on the outer surface of the sheath from all directions, so as to realize contact and diffusion connection between interfaces of the materials to be connected. The hot isostatic pressing diffusion welding can realize precise connection between two hemispherical shells by designing a proper sheath and adjusting process parameters, and the connecting joint has high strength.
The sheath design is the most critical ring of hot isostatic pressure diffusion welding, and the sheath is required to ensure effective conduction of the pressure required by the combination between the workpieces in the hot isostatic pressure process; under the temperature and pressure of the hot isostatic pressing diffusion welding process, the sheath material has enough strength and deformation, is not melted, is not damaged and is not leaked; the assembly is simple, the sheath is attached to the part as much as possible, all possible gaps are reduced, and the small deformation of the sheath during heating and boosting can be ensured to wrap the workpiece to be welded; the jacket design takes into account the heat affected zone during welding to avoid oxidation caused by temperature conduction into the component. But there is currently a lack of a capsule device suitable for hot isostatic diffusion welding of hemispherical shell workpieces that is effective in pressure transmission, leak-free, simple to assemble and easy to remove.
Disclosure of Invention
The invention aims to provide a sheath device for hot isostatic pressure diffusion welding of a hemispherical shell workpiece, which can realize precise connection of the workpiece to be welded, has high connection strength, ensures that other surfaces of the workpiece after welding are not adhered to the sheath, can be easily removed, has a good surface state after removal, and does not need secondary processing.
According to one object of the invention, the invention provides a sheath device for hot isostatic pressing diffusion welding of hemispherical shell workpieces, which comprises an inner sheath, an outer sheath and an exhaust tube, wherein the inner sheath can be embedded into the outer sheath to form a cavity for accommodating hemispherical shell-shaped workpieces to be welded, and the exhaust tube is connected to the side wall of the inner sheath.
Further, the outer sheath and the inner sheath are of hemispherical shell structures, a circle of flange is arranged on the side wall edges of the outer sheath and the inner sheath, and the radius of the inner sheath is smaller than that of the outer sheath.
Further, the distance between the inner sheath and the outer sheath is equal to the sum of the wall thickness of the two hemispherical shell-shaped workpieces to be welded and the wall thickness of the isolating layer.
Further, an isolation layer is arranged between the hemispherical shell-shaped workpiece to be welded and the outer sheath and the inner sheath.
Further, a preformed hole is formed in the flange on the inner sheath, and the exhaust tube is welded to the preformed hole.
Further, a cushion block is arranged between the outer sheath and the inner sheath.
Further, the cushion block is of a circular ring structure, and the height of the cushion block is equal to the distance between the outer sheath and the inner sheath.
Further, after the cushion block is placed between the outer sheath and the inner sheath, one end of the cushion block is contacted with the bottom of the hemispherical shell-shaped workpiece to be welded, and the other end of the cushion block is contacted with the inner wall of the flange of the inner sheath.
Further, the exhaust pipe is a stainless steel pipe, and the connection part of the exhaust pipe and the inner sheath is opposite to the cushion block.
Further, the cushion block is a stainless steel cushion block.
According to the technical scheme, when two hemispherical shell-shaped workpieces to be welded are welded, precise connection can be realized, gas and other impurities are not contained in joints, the connection strength is extremely high, other surfaces of the welded workpieces are not adhered to a sheath, the welded workpieces can be easily removed, the removed surfaces are in a good state, and secondary processing is not needed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3A according to an embodiment of the present invention;
FIG. 5 is a schematic view of the explosive structure of the outer jacket, the inner jacket and the spacer according to the embodiment of the present invention;
FIG. 6 is a schematic view of an embodiment of an isolation layer;
in the figure, 1, an inner sheath; 2. an outer sheath; 3. a cushion block; 4. an isolation layer; 5. an exhaust pipe; 6. a flange; 7. hemispherical shell-shaped workpieces to be welded; 8. and (5) reserving holes.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in figures 1-6 of the drawings,
a sheath device for hemispherical shell work piece hot isostatic pressure diffusion welding, includes interior sheath 1, outer sheath 2, cushion 3, isolation layer 4 and exhaust tube 5, wherein:
the outer sheath 2 and the inner sheath 1 are of hemispherical shell structures, the edges of the side walls of the outer sheath 2 and the inner sheath 1 are respectively provided with a circle of flange 6, the radius of the inner sheath 1 is smaller than that of the outer sheath 2, the inner sheath 1 can be embedded into the outer sheath 2 to form a cavity for accommodating hemispherical workpieces, and the distance between the inner sheath 1 and the outer sheath 2 is equal to the sum of the wall thickness of two hemispherical shell workpieces 7 to be welded and the wall thickness of the isolating layer 4.
The flange 6 of the inner sheath 1 is provided with a preformed hole 8, and the exhaust tube 5 is welded on the preformed hole 8 of the inner sheath 1.
The cushion block 3 is of a ring-shaped structure, can be placed between the outer sleeve 2 and the inner sleeve 1, has the height equal to the distance between the outer sleeve 2 and the inner sleeve 1, and is placed between the outer sleeve 2 and the inner sleeve 1, one end of the cushion block 3 is contacted with the bottom of the hemispherical shell-shaped workpiece 7 to be welded, the other end of the cushion block is contacted with the inner wall of the flange 6 of the inner sleeve 1, and the cushion block 3 is used for guaranteeing the size of the hemispherical workpiece.
An isolating layer 4 is arranged between the hemispherical shell-shaped workpiece 7 to be welded and the outer sheath 2 and the inner sheath 1, and the isolating layer is adopted for transition.
After the hemispherical shell-shaped workpiece 7 to be welded is assembled with the isolation layer 4, the cushion block 3, the outer sheath 2 and the inner sheath 1, the flanges 6 of the outer sheath 2 and the inner sheath 1 are welded, the whole sheath device is sealed, and leakage detection and exhaust are carried out only through the exhaust pipe 5.
In this embodiment, the outer sheath 2 and the inner sheath 1 are each composed of a hemispherical shell and a circular flange, and the flange is used for guaranteeing the welding position to be far away from the workpiece, preventing oxidation and protecting the workpiece.
The isolating layer 4 is determined according to the material of the workpiece, 12 equal parts are equally divided for attaching the hemispherical shell-shaped workpiece when in use, 5-degree notches are cut off for each part, and a square of 10mm is reserved in the middle of the isolating layer.
The cushion block 3 is made of stainless steel and is arranged at the ports of the outer sheath 2 and the inner sheath 1.
The exhaust pipe 5 is a stainless steel pipe, and the connecting part of the exhaust pipe and the inner sheath 1 is opposite to the stainless steel cushion block, so that the part is prevented from being extruded into the exhaust pipe in the hot isostatic pressing process, and the deformation of the part can be prevented.
When the welding of the first hemispherical shell workpiece and the second hemispherical shell workpiece is carried out, firstly, the two sections of the exhaust pipes are pre-welded, and then the pre-welding is carried out on the pre-reserved holes of the inner sleeves of the exhaust pipes with small diameters.
And then assembling the outer sheath, the isolation layer, the first half spherical shell workpiece, the second half spherical shell workpiece, the isolation layer and the inner sheath from outside to inside, assembling the isolation layer and the cushion block at the spherical shell ports of the outer sheath and the inner sheath, then pre-welding the flanges of the outer sheath and the inner sheath, finally fixing the whole sheath device, fully welding all pre-welded parts, and finally sealing the sheath device, wherein only an air suction pipe orifice is reserved for subsequent evacuation and air exhaust.
When the two semi-spherical shells are welded with the workpieces to be welded, the precise connection is realized, the joint is high in connection strength, other surfaces of the welded workpieces are not adhered to the sheath due to the existence of the isolating layer, the welded workpieces can be easily removed, the removed surfaces are good in state, and secondary processing is not needed. Meanwhile, the welding device can be applied to welding of various combined dissimilar metal materials, and is wide in application range.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The sheath device for the hemispherical shell workpiece hot isostatic pressure diffusion welding is characterized by comprising an inner sheath, an outer sheath and an exhaust tube, wherein the inner sheath can be embedded into the outer sheath to form a cavity for accommodating the hemispherical shell workpiece to be welded, and the side wall of the inner sheath is connected with the exhaust tube.
2. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 1, wherein the outer capsule and the inner capsule are of hemispherical structures, the side wall edges of the outer capsule and the inner capsule are provided with a circle of flange, and the radius of the inner capsule is smaller than that of the outer capsule.
3. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 2, wherein an isolating layer is provided between the hemispherical workpiece to be welded and the outer and inner capsule.
4. A capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 3, characterized in that the distance between the inner and outer capsule is equal to the sum of the wall thickness of the two hemispherical workpieces to be welded and the wall thickness of the isolating layer.
5. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 2, wherein a preformed hole is provided on the flange on the inner capsule, and the exhaust tube is welded on the preformed hole.
6. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 1, wherein a spacer is provided between the outer capsule and the inner capsule.
7. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 6, wherein the spacer has a circular ring-shaped structure, and the height of the spacer is equal to the distance between the outer capsule and the inner capsule.
8. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 7, wherein one end of the pad is in contact with the bottom of the hemispherical shell-shaped workpiece to be welded and the other end of the pad is in contact with the inner wall of the flange of the inner capsule after the pad is placed between the outer capsule and the inner capsule.
9. The capsule device for hot isostatic pressing diffusion welding of hemispherical workpieces according to claim 7, wherein the exhaust pipe is a stainless steel pipe, and the connection part of the exhaust pipe and the inner capsule is opposite to the cushion block.
10. The capsule apparatus for hot isostatic pressing diffusion welding of hemispherical workpieces of claim 7, wherein the spacer is a stainless steel spacer.
CN202310218656.XA 2023-03-08 2023-03-08 Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece Pending CN116511689A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310218656.XA CN116511689A (en) 2023-03-08 2023-03-08 Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310218656.XA CN116511689A (en) 2023-03-08 2023-03-08 Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece

Publications (1)

Publication Number Publication Date
CN116511689A true CN116511689A (en) 2023-08-01

Family

ID=87398302

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310218656.XA Pending CN116511689A (en) 2023-03-08 2023-03-08 Sheath device for hot isostatic pressure diffusion welding of hemispherical shell workpiece

Country Status (1)

Country Link
CN (1) CN116511689A (en)

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