CN110678016A - Big cavity structure of spiro union stress decomposition combination laser seal welding - Google Patents
Big cavity structure of spiro union stress decomposition combination laser seal welding Download PDFInfo
- Publication number
- CN110678016A CN110678016A CN201910813617.8A CN201910813617A CN110678016A CN 110678016 A CN110678016 A CN 110678016A CN 201910813617 A CN201910813617 A CN 201910813617A CN 110678016 A CN110678016 A CN 110678016A
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- China
- Prior art keywords
- cover plate
- hole
- box body
- cavity structure
- welding
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/04—Metal casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0004—Casings, cabinets or drawers for electric apparatus comprising several parts forming a closed casing
- H05K5/0008—Casings, cabinets or drawers for electric apparatus comprising several parts forming a closed casing assembled by screws
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0204—Mounting supporting structures on the outside of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
- H05K5/066—Hermetically-sealed casings sealed by fusion of the joining parts without bringing material; sealed by brazing
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a large cavity structure for bolt joint stress decomposition combined laser seal welding, which comprises a box body, a main cover plate, a small cover plate and a fastening piece, wherein the main cover plate is arranged on the box body; the box body is provided with a reinforcing part, a connecting hole with threads is formed in the reinforcing part, a connecting part is arranged on the main cover plate and corresponds to the reinforcing part, a through hole is formed in the connecting part, the fastener penetrates through the through hole to be in threaded connection with the connecting hole, and the box body is in sealed connection with the outer edge of the main cover plate; the end part of the through hole far away from the box body is provided with the small cover plate, and the small cover plate is arranged at the end part of the through hole and is in sealing connection with the through hole; the structure of the invention can obviously improve the deformation resistance of the sealing and welding structure of the cover plate of the large sealed cavity and reduce the stress level at the welding seam, thereby being beneficial to the high-reliability design of high-integration electronic equipment.
Description
Technical Field
The invention relates to the technical field of airtight welding structures of closed cavities, in particular to a large cavity structure combining screw joint stress decomposition and laser sealing welding.
Background
The requirements for the use environment of electronic equipment which is more and more severe are that the protection requirements on moisture resistance, mold resistance, salt mist resistance and the like are higher and higher. The insufficient protection of the electronic equipment product directly affects the performance indexes of the product, such as signal emission and reception, electric conduction, magnetic conduction, electromagnetic shielding and the like. With the increasingly high requirements on performance indexes and reliability of electronic equipment, part of the electronic equipment also has long service life, and a good protection design is urgently needed for a bare chip electronic device or a waveguide structure needing airtight packaging and the like. For the conventional design, a single chip and a single structure are mainly packaged independently or packaged in a small module, and the design needs large space and weight and cannot meet the miniaturization and high integration requirements of advanced electronic products. In order to meet the requirements of miniaturization, high integration and light weight of advanced electronic products, unified large-cavity fusion packaging design is carried out on a bare chip and a waveguide structure needing airtight packaging. Therefore, the problem of hermetic packaging of large hermetic chambers is to be solved.
At present, a single aluminum alloy box body and an aluminum alloy cover plate are sealed airtight, and the cover plate of the large cavity is large in stress area and weak in overall strength when the low air pressure is close to a vacuum state. The cover plate is easy to deform and the welding seam is easy to crack when the cover plate bears the force of 1 atmosphere in a low-pressure environment.
In view of the above-mentioned drawbacks, the inventors of the present invention have finally obtained the present invention through a long period of research and practice.
Disclosure of Invention
In order to solve the technical defects, the invention adopts the technical scheme that a large cavity structure combining the screw connection stress decomposition and the laser sealing welding is provided, and the large cavity structure comprises a box body, a main cover plate, a small cover plate and a fastening piece; the box body is provided with a reinforcing part, a connecting hole with threads is formed in the reinforcing part, a connecting part is arranged on the main cover plate and corresponds to the reinforcing part, a through hole is formed in the connecting part, the fastener penetrates through the through hole to be in threaded connection with the connecting hole, and the box body is in sealed connection with the outer edge of the main cover plate; the end part of the through hole far away from the box body is provided with the small cover plate, and the small cover plate is arranged at the end part of the through hole and is in sealing connection with the through hole.
Preferably, the reinforcing part is provided at a central position of the case.
Preferably, the connecting part and the reinforcing part are in contact connection to form a force bearing structure.
Preferably, the outer edge of the box body is provided with a boss corresponding to the main cover body, and the boss limits the relative position of the box body and the main cover body in a connection state.
Preferably, one end of the through hole is provided with a groove, the groove is matched with the small cover plate in shape, and the small cover plate is hermetically connected in the groove.
Preferably, the outer edges of the box body and the main cover plate are hermetically connected, and the small cover plate is hermetically connected at the end part of the through hole by laser welding.
Preferably, the laser welding adopts a high-frequency high-speed welding mode.
Preferably, the thickness of the small cover plate is set to be 1.2 mm-1.5 mm.
Compared with the prior art, the invention has the beneficial effects that: 1, the structure of the invention can obviously improve the deformation resistance of the seal welding structure of the cover plate of the large sealed cavity and reduce the stress level at the welding seam, thereby being beneficial to the highly reliable design of highly integrated electronic equipment; 2, the structure of the invention can realize the integrated unified airtight design of the multifunctional bare chip and the waveguide structure, which is beneficial to the miniaturization, high integration and same cooperation design of the new generation of electronic equipment products; 3, stress decomposition is carried out by means of mechanical locking through reasonable design of a bearing fastening point, and the stress value of a welding seam for sealing and welding a large sealed cavity can be effectively reduced; 4, by adopting a closed bearing structure design, the whole rigidity of the large sealed cavity can be improved while the bearing structure of the sealed cavity is increased, and the stress deformation is prevented; 5, the large cavity is airtight by adopting a mode of welding aluminum alloy and combining a main deformation area in a screwed connection and fastening mode, the reliability is high, and meanwhile, the long-period storage requirement of part of electronic equipment can be met due to the fact that the electronic equipment is packaged by a mechanical structure; and 6, the screw fastening part adopts the small cover plate and the main cover plate to carry out laser seal welding for carrying out airtight packaging, so that the local rigidity of the perforated area can be improved while the airtight design is met.
Drawings
FIG. 1 is a schematic diagram of the external structure of the large cavity structure for the bolt joint stress decomposition combined laser seal welding;
FIG. 2 is a schematic view of the internal structure of the large cavity structure for the bolt joint stress decomposition combined with laser seal welding;
FIG. 3 is a schematic structural diagram of the cartridge body;
FIG. 4 is a schematic structural view of the main cover plate;
fig. 5 is a schematic structural view of the small cover plate.
The figures in the drawings represent:
1-sealing the cavity; 2-box body; 3-a main cover plate; 4-small cover plate; 5-fastening the screw.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Example one
As shown in fig. 1 and 2, fig. 1 is an external structural schematic diagram of the large cavity structure of the bolt joint stress decomposition and laser seal welding; FIG. 2 is a schematic view of the internal structure of the large cavity structure for the bolt joint stress decomposition combined with laser seal welding; the large cavity structure for the screw joint stress decomposition combined laser seal welding comprises a box body 2, a main cover plate 3, a small cover plate 4 and a fastening screw 5; the box body 2 and the main cover plate 3 are connected to form a large cavity structure with a sealed cavity 1, specifically, the box body 2 is provided with a reinforcing part which is generally arranged at the central position of the box body 2, the reinforcing part is provided with a connecting hole with threads, a connecting part is arranged on the main cover plate 3 correspondingly, the connecting part is arranged correspondingly to the reinforcing part, a through hole is arranged on the connecting part, the fastening screw 5 penetrates through the through hole to be in threaded connection with the connecting hole, so that the box body 2 and the main cover plate 3 are connected at the central position, and the outer edges of the box body 2 and the main cover plate 3 are in sealed connection in a welding mode; the end part of the through hole far away from the box body 2 is provided with the small cover plate 4, and the small cover plate 4 is welded at the end part of the through hole, so that the through hole is sealed. Therefore, the box body 2 is in sealing connection with the main cover plate 3, and the small cover plate 4 is in sealing connection with the through hole, so that the sealing effect of the sealing cavity 1 is realized.
Preferably, the connecting portion and the reinforcing portion form a force-bearing structure, and when the connecting portion is in contact connection with the end portion of the reinforcing portion, the main cover plate 3 is not stressed and is completely deformed, that is, the main cover body is in a flat state.
Preferably, the outer edge of the box body 2 is provided with a boss corresponding to the main cover body 3, and the boss is used for limiting the relative connection position of the box body 2 and the main cover body 3, so as to ensure the stability of the relative position of the box body 2 and the main cover body 3.
Preferably, the through hole is a countersunk hole, that is, a groove is formed at one end of the through hole, and the groove is matched with the small cover plate 4 in shape, so that the small cover plate 4 is placed in the groove, and the through hole is sealed after the inner surface of the groove is hermetically connected with the small cover plate 4.
The main cover plate 3 is rigidly fixed at the reinforcing rib at the bottom of the box body 2 through the fastening screw 5; laser sealing a round small cover plate 4 at the screw hole of the main cover plate to realize airtight packaging at the connecting position of the fastening screw 5; in order to reduce the thermal influence on internal components during laser welding, the thickness of the small cover plate 4 is designed to be 1.2 mm-1.5 mm, so that the circular small cover plate is ensured to be welded through under the condition of heat input as small as possible; and welding the main cover plate 3 and the box body 2 in a laser welding mode to realize integral airtight packaging. And meanwhile, a high-frequency high-speed welding mode is adopted in the laser welding process, so that the welding time is shortened while the strength of a laser welding seam is ensured, and the heat input is reduced.
The stress decomposition design of the screw connection main bearing structure can solve the problems that the weak part of the cover plate is easy to deform and the welding line is easy to crack under the low-pressure stress condition of a large closed cavity. The invention identifies the maximum stress deformation through integral stress analysis, and performs screw connection, locking and reinforcement at the maximum deformation position (near the geometric center) of the cover plate, thereby increasing the force bearing point and simultaneously improving the deformation resistance of the cover plate, and further reducing the stress level at the welding seam.
For the closed large cavity structure, the most easily deformed position, namely the position with weaker rigidity and strength, is positioned on the sealing and welding large cover plate and the bottom surface of the box body, and a boss interconnection screw locking structure is designed between the cover plate and the bottom surface of the box body to form a closed force bearing structure; the closed bearing structure design can obviously improve the overall rigidity of the large cavity structure and effectively solve the problem of low-pressure deformation of the large cavity.
The invention adopts 6061-containing 4047 aluminum alloy to carry out gas seal welding in a laser welding mode, wherein the box body is made of 6061 material, the main cover plate is made of 4047 material, and the small cover plate is made of 6061 material; for large cavity structures with different sizes, 3.2x10 can be effectively realized by optimizing parameters such as laser power, pulse width and the like and combining the structural form of the invention- 9Pa·m3The low air pressure requirement of/s can meet and is superior to the requirement of GJB 548B.
Example two
Referring to fig. 3, for explaining the internal simple reinforcing rib structure of the large cavity structure of the present invention, for the box body 2 with length × width × height set to 155mm × 98mm × 41mm, only 2 reinforcing ribs need to be arranged side by side in terms of length and a bearing boss is designed at an easily deformable position, the bearing boss is the reinforcing part, meanwhile, a main cover plate embedded welding sink groove with a depth of 2mm to 2.5mm is designed on the upper end face of the box body 2, and the main cover plate embedded welding sink groove is the boss, so that the strength and airtight welding requirements of the present invention can be satisfied.
Referring to fig. 4, for explaining the main cover plate 3 of the present invention, wherein, fig. (a) and fig. (b) are respectively an upper side view and a lower side view of the main cover plate 3, a screw counter bore structure is designed at a position of the main cover plate 3 which is easy to deform, i.e. has weak rigidity and strength, and the screw counter bore structure is the through hole and is used for mounting a counter-bore screw; and the local arc transition boss is designed as a structure, namely the connecting part and is used for bearing interconnection between the box body 2 and the main cover plate 3, namely the connecting part and the reinforcing part realize a closed bearing structure.
Referring to fig. 5, for explaining the small cover plate 4 of the present invention, the small cover plate 4 is a circular thin-walled structure, and the hermetic sealing of the screw-threaded through structure can be realized by laser seal assembly between the small cover plate 4 and the main cover plate 3.
According to the large cavity structure adopting the combination of the screw connection stress decomposition and the laser sealing welding, the screw connection structure is added at the position (near the geometric center) with weaker rigidity of the main cover plate 3, so that the force bearing point is increased, the deformation resistance of the main cover plate 3 is improved, the stress level at the welding seam is reduced, the problem of low-pressure stress deformation and cracking of the closed large cavity structure is effectively solved, and the high-integration, high-reliability and large-cooperative design of new-generation electronic equipment is facilitated.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A large cavity structure combining screw joint stress decomposition and laser seal welding is characterized by comprising a box body, a main cover plate, a small cover plate and a fastening piece; the box body is provided with a reinforcing part, a connecting hole with threads is formed in the reinforcing part, a connecting part is arranged on the main cover plate and corresponds to the reinforcing part, a through hole is formed in the connecting part, the fastener penetrates through the through hole to be in threaded connection with the connecting hole, and the box body is in sealed connection with the outer edge of the main cover plate; the end part of the through hole far away from the box body is provided with the small cover plate, and the small cover plate is arranged at the end part of the through hole and is in sealing connection with the through hole.
2. A bolted stress-resolved laser-sealed large-cavity structure as claimed in claim 1, wherein said reinforcement is provided at the central location of said box.
3. The large cavity structure for bolt joint stress decomposition and laser seal welding according to claim 1, wherein the connecting part and the reinforcing part are in contact connection to form a force bearing structure.
4. The large cavity structure for bolt joint stress decomposition combined laser sealing welding according to claim 1, wherein a boss is arranged on the outer edge of the box body corresponding to the main cover body, and the boss limits the relative position of the box body and the main cover body in a connection state.
5. The large cavity structure for bolt joint stress-resolved laser sealing and welding according to claim 1, wherein a groove is formed at one end of the through hole, the groove is matched with the small cover plate in shape, and the small cover plate is hermetically connected in the groove.
6. The bolted stress-resolved laser-sealed large-cavity structure as claimed in claim 1, wherein the sealed connection of the outer edges of the box body and the main cover plate and the sealed connection of the small cover plate at the end of the through hole are both formed by laser welding.
7. The large-cavity structure for the screw joint stress decomposition and laser sealing welding according to claim 6, wherein the laser welding adopts a high-frequency high-speed welding mode.
8. The large cavity structure for the bolt joint stress decomposition and laser sealing welding according to claim 1, wherein the thickness of the small cover plate is set to be 1.2 mm-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813617.8A CN110678016A (en) | 2019-08-29 | 2019-08-29 | Big cavity structure of spiro union stress decomposition combination laser seal welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813617.8A CN110678016A (en) | 2019-08-29 | 2019-08-29 | Big cavity structure of spiro union stress decomposition combination laser seal welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110678016A true CN110678016A (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910813617.8A Pending CN110678016A (en) | 2019-08-29 | 2019-08-29 | Big cavity structure of spiro union stress decomposition combination laser seal welding |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1195702A (en) * | 1967-05-12 | 1970-06-24 | Harry Stanley Woodhead | Hermetically Sealed Push Switch |
| JP2000314204A (en) * | 1999-04-30 | 2000-11-14 | Nippon Electric Glass Co Ltd | Building glass block |
| CN101865115A (en) * | 2010-06-22 | 2010-10-20 | 浙江鸿友压缩机制造有限公司 | Piston assembly of air compressor |
| CN202825075U (en) * | 2012-09-18 | 2013-03-27 | 安徽安凯福田曙光车桥有限公司 | Position clamp of arc-shaped fixing clip welding special used |
| CN106377294A (en) * | 2010-12-21 | 2017-02-08 | 史赛克公司 | Control module for powered surgical tool including active seal |
| CN207219187U (en) * | 2017-07-31 | 2018-04-10 | 安徽四创电子股份有限公司 | A kind of power division network component box body |
| CN109166826A (en) * | 2018-08-02 | 2019-01-08 | 昆山国显光电有限公司 | Display panel and display device with it |
| CN110035626A (en) * | 2019-04-17 | 2019-07-19 | 成都雷电微力科技有限公司 | A kind of miniaturization microwave components airtight construction |
-
2019
- 2019-08-29 CN CN201910813617.8A patent/CN110678016A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1195702A (en) * | 1967-05-12 | 1970-06-24 | Harry Stanley Woodhead | Hermetically Sealed Push Switch |
| JP2000314204A (en) * | 1999-04-30 | 2000-11-14 | Nippon Electric Glass Co Ltd | Building glass block |
| CN101865115A (en) * | 2010-06-22 | 2010-10-20 | 浙江鸿友压缩机制造有限公司 | Piston assembly of air compressor |
| CN106377294A (en) * | 2010-12-21 | 2017-02-08 | 史赛克公司 | Control module for powered surgical tool including active seal |
| CN202825075U (en) * | 2012-09-18 | 2013-03-27 | 安徽安凯福田曙光车桥有限公司 | Position clamp of arc-shaped fixing clip welding special used |
| CN207219187U (en) * | 2017-07-31 | 2018-04-10 | 安徽四创电子股份有限公司 | A kind of power division network component box body |
| CN109166826A (en) * | 2018-08-02 | 2019-01-08 | 昆山国显光电有限公司 | Display panel and display device with it |
| CN110035626A (en) * | 2019-04-17 | 2019-07-19 | 成都雷电微力科技有限公司 | A kind of miniaturization microwave components airtight construction |
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Application publication date: 20200110 |