CN115722880A - High-temperature-resistant ultrathin-wall packaging shell and forming method thereof - Google Patents
High-temperature-resistant ultrathin-wall packaging shell and forming method thereof Download PDFInfo
- Publication number
- CN115722880A CN115722880A CN202211468824.2A CN202211468824A CN115722880A CN 115722880 A CN115722880 A CN 115722880A CN 202211468824 A CN202211468824 A CN 202211468824A CN 115722880 A CN115722880 A CN 115722880A
- Authority
- CN
- China
- Prior art keywords
- shell
- temperature
- resistant
- wall
- ultrathin
- 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
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000007704 transition Effects 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000003466 welding Methods 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 8
- UQZIWOQVLUASCR-UHFFFAOYSA-N alumane;titanium Chemical compound [AlH3].[Ti] UQZIWOQVLUASCR-UHFFFAOYSA-N 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 7
- 229910000765 intermetallic Inorganic materials 0.000 claims description 7
- 238000003698 laser cutting Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 238000009461 vacuum packaging Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 238000009966 trimming Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A high-temperature-resistant ultrathin-wall packaging shell belongs to the technical field of high-temperature-resistant material packaging for aircrafts. The shell comprises a shell body, wherein the shell body comprises a shell bottom and a shell top, and the shell top is provided with a flange; the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure. The invention also provides a forming method of the high-temperature-resistant ultrathin-wall packaging shell. The high-temperature-resistant ultrathin-wall packaging shell provided by the invention adopts a flanged fillet transition box-shaped integrated structure, has light weight and high structural reliability, avoids stress concentration at a sharp corner and solves the problem of welding tearing; the invention realizes the integrated forming of the packaging structure, and has the advantages of short preparation process, low material performance loss, high reliability and long service life.
Description
Technical Field
The invention relates to the technical field of high-temperature-resistant material packaging for aircrafts, in particular to a high-temperature-resistant ultrathin-wall packaging shell and a forming method of the high-temperature-resistant ultrathin-wall packaging shell.
Background
The outer heat-proof scheme of the aircraft is a main option scheme for the heat protection of the aircraft body due to the light weight and the benefit for the design of the bearing structure of the aircraft body. Because the metal material has the inherent advantage in the aspect of environment tolerance, the metal material can be utilized to package the heat-insulating material to form an integrated structure for preventing and insulating heat, the problem of environmental adaptability is solved, and the use requirement of the flight environment is met.
The high-speed aircraft has a severe flying thermal environment and an extremely low structural mass ratio, structural materials are required to meet requirements of high temperature resistance and light weight, a traditional packaging structure generally adopts a method of flanging or bending a sheet metal part and then sealing edges for welding, the method has the advantages of multiple welding lines, heavy mass and poor structural reliability, stress concentration is easily caused at the sharp corners of the sealing edges, the welding lines are easily torn under a pneumatic heating condition, so that the outer protection of an aircraft body is failed, and the flying safety is directly threatened, therefore, the high-temperature-resistant ultrathin-wall integrated packaging structure becomes a feasible packaging structure scheme.
However, forming of the high-temperature-resistant ultrathin-wall integrated packaging structure has a series of process difficulties, such as: due to the wall thickness effect, the forming performance of the material is greatly reduced, local wall thickness is easily excessively thinned and even cracked, meanwhile, the rebound degree of the ultrathin wall material is aggravated, and the forming precision control difficulty is increased.
Disclosure of Invention
The technical problem is as follows:
in summary, how to provide a high temperature resistant ultra-thin wall package structure with light weight and high reliability and a method for forming the same, which are used to overcome the deficiencies of the prior art, are the problems to be urgently solved by the technical personnel in the field.
The technical scheme is as follows:
in order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a high-temperature-resistant ultrathin-wall packaging shell which comprises a shell body, wherein the shell body comprises a shell bottom and a shell top arranged opposite to the shell bottom, the shell top is a packaging opening, and a flange is arranged around the shell top; the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure.
Preferably, in the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, the center line of the shell body in the length direction is taken as a symmetric center, the shell bottom is of a downward-bent curved surface structure, the shell top is of a downward-bent curved surface structure, and the curvatures of the shell bottom and the shell top are consistent.
Preferably, in the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, a center line of the shell body in the width direction is taken as a symmetry center, the shell bottom is of a downward-bending type curved surface structure, the shell top is of a downward-bending type curved surface structure, and the curvatures of the shell bottom and the shell top are consistent.
Preferably, in the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, the high-temperature-resistant ultrathin-wall packaging shell is made of a high-temperature-resistant sheet metal, the temperature resistance range of the high-temperature-resistant sheet metal is 800-1100 ℃, and the thickness selection range of the high-temperature-resistant sheet metal is 0.1-0.5 mm.
Preferably, in the high-temperature-resistant ultra-thin-walled package shell provided by the invention, the high-temperature-resistant sheet metal is a high-temperature alloy or a titanium-aluminum-based intermetallic compound.
Preferably, in the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, the depth of the shell body ranges from 10mm to 25mm; the radius size range of the fillet transition structure is R2mm-R8mm; the width size range of the flange is 2mm-8mm.
The invention also provides a forming method of the high-temperature-resistant ultrathin-wall packaging shell, which comprises the following steps of:
selecting a high-temperature-resistant sheet material, wherein the temperature resistance range of the high-temperature-resistant sheet material is 800-1100 ℃, and the thickness selection range of the high-temperature-resistant sheet material is 0.1-0.5 mm;
designing a packaging structure, wherein the high-temperature-resistant ultrathin-wall packaging shell is a box-shaped integrated structure provided with a flange, and the high-temperature-resistant ultrathin-wall packaging shell adopts a fillet transition structure;
step three, forming the ultrathin-wall shell main body, and flexibly forming the high-temperature-resistant sheet material by adopting a hydro-mechanical deep drawing process;
step four, performing springback compensation on the ultrathin-wall shell main body, namely performing three-dimensional scanning on the ultrathin-wall shell main body formed in the step three, comparing the scanning outline with the model outline to obtain compensation data, and performing springback compensation through die surface modification;
and step five, welding surface treatment, namely performing edge cutting treatment on the ultrathin-wall shell main body subjected to springback compensation in the step four, and keeping the width size range of the flange surface to be 2-5 mm for welding in vacuum packaging.
Preferably, in the forming method of the high-temperature-resistant ultra-thin-walled package shell provided by the invention, in the step one, the high-temperature-resistant sheet material is a high-temperature alloy or a titanium-aluminum-based intermetallic compound.
Preferably, in the forming method of the high-temperature-resistant ultrathin-wall package shell provided by the invention, the high-temperature-resistant thin plate is subjected to laser cutting blanking.
Preferably, in the forming method of the high-temperature-resistant ultra-thin-wall package shell provided by the invention, in the second step, the high-temperature-resistant ultra-thin-wall package shell has a shell main body, a flange is arranged on the top surface of the shell main body, the connecting part of the flange and the shell main body is of a fillet transition structure, and the connecting part of the shell bottom of the shell main body and the surrounding edge of the shell main body is of a fillet transition structure; the depth size range of the shell body is 10mm-25mm, the radius of the fillet transition structure is R2mm-R8mm, and the width size range of the flange is 2mm-8mm.
Preferably, in the forming method of the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, in the third step, the stamping force of the plate, the edge pressing force of the plate and the like are independently controlled by a double-acting hydraulic press, and the hydraulic pressure is controlled by an ultrahigh-pressure water system, so that the hydro-mechanical deep-drawing flexible forming of the plate is realized.
Preferably, in the forming method of the high-temperature-resistant ultrathin-wall packaging shell provided by the invention, in the third step, lubricating oil is applied to the sheet material for increasing the flowing capacity of the material in the hydro-mechanical deep-drawing flexible forming process.
Preferably, in the forming method of the high-temperature-resistant ultrathin-wall package shell provided by the invention, in the fourth step, three-dimensional scanning is performed on the formed ultrathin-wall shell main body, and a compensation scheme is formulated according to a rebound calculation result; the compensation scheme formulated by the rebound calculation result is as follows: springback compensation is handled according to the symmetry, and ultra-thin wall casing main part length direction or width direction's middle part compensation numerical value is 0, and the biggest compensation numerical value of preceding back flange farthest end is 3.5mm, and the compensation proportion is 1: and 0.8, correspondingly changing the die surface according to the compensation scheme, and performing secondary drawing forming to obtain the ultra-thin wall shell main body subjected to springback compensation.
Preferably, in the forming method of the high-temperature-resistant ultra-thin-walled package shell provided by the invention, the profile tolerance of the ultra-thin-walled shell body is within 0.5mm.
(III) the beneficial effects are as follows:
the invention provides a high-temperature-resistant ultrathin-wall packaging shell which comprises a shell body, wherein the shell body comprises a shell bottom and a shell top arranged opposite to the shell bottom, the shell top is a packaging opening, and a flange is arranged around the shell top; the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure. The invention also provides a forming method of the high-temperature-resistant ultrathin-wall packaging shell, which comprises the following steps: step one, selecting a high-temperature-resistant sheet material; step two, designing a packaging structure; step three, forming the main body of the ultrathin-wall shell; step four, compensation of springback of the main body of the ultrathin-wall shell; and step five, processing the welding surface.
Through the structural design, compared with the prior art, the invention has the following beneficial effects:
1. the high-temperature-resistant ultrathin-wall packaging shell provided by the invention adopts a flanged fillet transition box-shaped integrated structure, has light weight and high structural reliability, avoids stress concentration at a sharp corner and solves the problem of welding tearing;
2. the invention solves the problem of excessive thinning and rebound of local wall thickness caused by wall thickness effect through liquid-filled flexible forming and rebound compensation, and realizes the precise forming of the lightweight shell main body;
3. the invention realizes the integrated forming of the packaging structure, and has the advantages of short preparation process, low material performance loss, high reliability and long service life.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural diagram of a high temperature resistant ultra-thin wall package housing in an embodiment of the invention;
fig. 2 is a flow chart of a method for forming a high temperature resistant ultra-thin wall package housing in an embodiment of the invention.
In fig. 1, the correspondence between the component names and the reference numerals is:
the flange 1, the fillet transition structure 2 at the connecting part of the flange and the shell body, the fillet transition structure 3 at the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body, and the shell bottom 4.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" as used herein are intended to be broadly construed, and may include, for example, fixed connections and removable connections; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a high temperature resistant ultra-thin wall package casing according to an embodiment of the invention; fig. 2 is a flow chart of a method for forming a high temperature resistant ultra-thin wall package housing in an embodiment of the invention.
The invention provides a high-temperature-resistant ultrathin-wall packaging shell, which comprises two parts, namely a shell body and a flange 1, for the convenience of structural description. The casing body is of a box-shaped structure, and comprises a casing bottom 4 (in fig. 1, the casing bottom 4 is at the bottom of the casing body in a main view) and a casing top arranged opposite to the casing bottom 4 (in fig. 1, the casing top is at the top of the casing body in the main view, and is provided with a flange 1), the casing top is an encapsulation opening, and a flange 1 is arranged around the edge of the casing top, specifically, the flange 1 is of an annular smooth curved surface structure.
In order to avoid the problem that the welding seam is easy to tear due to stress concentration at the sharp structure, the invention provides the following design: the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange 1 and the shell body is a fillet transition structure 2, and the connecting part of the shell bottom 4 of the shell body and the surrounding edge of the shell body is a fillet transition structure 3. In addition, in the invention, except the limited part, other folding corners of the high-temperature-resistant ultrathin-wall packaging shell adopt a fillet transition structure.
From the above, the housing main body is of a box-shaped structure, and further, the housing main body is of a bent box-shaped structure. Specifically, the center line of the length direction of the shell body is taken as a symmetric center, the shell bottom 4 is of a downward-bending type curved surface structure, the shell top (namely the flange 1) is of a downward-bending type curved surface structure, and the curvatures of the shell bottom 4 and the shell top are consistent; or, the center line of the width direction of the shell body is taken as a symmetric center, the shell bottom is of a downward-bent curved surface structure, the shell top is of a downward-bent curved surface structure, and the curvatures of the shell bottom and the shell top are consistent.
In the invention, the high-temperature-resistant ultrathin-wall packaging shell is made of high-temperature-resistant sheet metal, the temperature resistance range of the high-temperature-resistant sheet metal is 800-1100 ℃, and the thickness selection range is 0.1-0.5 mm. Specifically, the high-temperature resistant metal sheet is a high-temperature alloy or a titanium-aluminum-based intermetallic compound, or other metal materials satisfying the above temperature resistance range.
Specifically, the depth range of the shell body is 10mm-25mm; the radius size range of the fillet transition structure (the fillet transition structure 2 at the connecting part of the flange and the shell body and the fillet transition structure 3 at the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body) is R2mm-R8mm; the width dimension of the flange 1 ranges from 2mm to 8mm.
The invention also provides a forming method of the high-temperature-resistant ultrathin-wall packaging shell, which comprises the following steps:
step one, selecting a high-temperature-resistant sheet material.
The temperature resistant range of the high temperature resistant sheet material is 800-1100 ℃, and the thickness of the high temperature resistant sheet material is selected to be 0.1-0.5 mm.
Specifically, in the first step, the high temperature resistant thin plate is made of high temperature alloy or titanium-aluminum-based intermetallic compound.
After the plate is selected, laser cutting blanking is carried out on the high-temperature-resistant thin plate to ensure the cutting precision of the plate.
And step two, designing a packaging structure.
The high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure provided with a flange, and the high-temperature-resistant ultrathin-wall packaging shell is of a fillet transition structure.
In the second step, the high-temperature-resistant ultrathin-wall packaging shell is provided with a shell body, a flange is arranged on the top surface of the shell body, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure; the depth size range of the shell body is 10mm-25mm, the radius of the fillet transition structure is R2mm-R8mm, and the width size range of the flange is 2mm-8mm.
And step three, forming the ultrathin-wall shell main body.
And flexibly forming the high-temperature-resistant sheet material by adopting a hydro-mechanical deep drawing process. Specifically, in the third step, the stamping force of the plate, the edge pressing force of the plate and the like are independently controlled through a double-acting hydraulic press, the liquid filling pressure is controlled through an ultrahigh pressure water system, and the liquid filling deep drawing flexible forming of the plate is realized. Further, in step three, lubricating oil is applied to the material for increasing the flowing capacity of the material in the hydro-mechanical deep drawing flexible forming process.
And step four, compensation of springback of the ultrathin-wall shell main body.
And (4) carrying out three-dimensional scanning on the ultrathin-wall shell main body formed in the step three, comparing the scanning outline with the model outline to obtain compensation data, and carrying out springback compensation through die surface modification.
Specifically, in the fourth step, the formed ultrathin-wall shell main body is scanned in three dimensions, and a compensation scheme is formulated according to the rebound calculation result. The compensation scheme is formulated according to the rebound calculation result as follows: springback compensation is processed according to the symmetry, and ultra-thin wall casing main part length direction or width direction's middle part compensation numerical value is 0, and the biggest compensation numerical value of preceding back flange farthest end is 3.5mm, and the compensation proportion is 1: and 0.8, correspondingly changing the die surface according to the compensation scheme, and performing secondary drawing forming to obtain the ultra-thin-wall shell main body subjected to springback compensation, wherein the profile tolerance of the ultra-thin-wall shell main body is within 0.5mm.
And step five, processing the welding surface.
And trimming the ultra-thin-wall shell main body subjected to the springback compensation in the fourth step, and keeping the width size range of the flange face to be 2-5 mm for welding in vacuum packaging.
The invention provides a high-temperature-resistant ultrathin-wall packaging structure and a forming method thereof, and as a core technical point of the invention, the high-temperature-resistant ultrathin-wall packaging structure is a box-shaped (the shape of a shell body is box-shaped) integrated structure with a flange (a flange structure is arranged on the shell body), and the fillet transition is adopted at a connecting part between the flange and the shell body and a connecting part between the shell bottom and a surrounding edge of the shell body.
The high-temperature-resistant ultrathin-wall packaging structure provided by the invention adopts a flanged fillet transition box-shaped integrated structure, has light weight and high structural reliability, and avoids stress concentration at a sharp corner; the excessive thinning and springback of local wall thickness caused by the wall thickness effect are solved through liquid-filled flexible forming and springback compensation, and the precise forming of the light-weight shell main body is realized; the integrated forming of the packaging structure is realized, the preparation process is short, the performance loss of the material is small, the reliability is high, and the service life is long.
Specifically, in the present invention, the method for forming the high temperature resistant ultra thin wall package structure is as follows:
firstly, selecting high-temperature resistant sheet materials.
The high-temperature-resistant ultrathin-wall packaging structure is made of high-temperature-resistant metal thin plates such as high-temperature-resistant alloy and titanium-aluminum-based intermetallic compounds, the temperature resistance range is 800-1100 ℃, and the thickness is 0.1-0.5 mm.
And secondly, designing a high-temperature-resistant ultrathin-wall packaging structure.
The shell body is of a flanged fillet transition box-shaped integrated structure, the size range of the depth (namely the depth of the shell body or the height of a surrounding edge) is 10mm-25mm, the top surface of the shell body is a flange surface (provided with a flange, the flange surface refers to the surface where the flange is arranged), fillets are adopted at the flange and the box bottom of the shell body for transition, the radius of each fillet is R2mm-R8mm, and the width of each flange is 2mm-8mm.
And thirdly, forming the ultrathin-wall shell main body.
And obtaining an optimized punching blank shape through process tests, and blanking the plate by adopting laser cutting. After laser cutting, hydro-mechanical drawing is adopted to flexibly form the ultra-thin wall shell main body.
Specifically, the punching pressure, the edge pressing force and the like are controlled independently through double-acting hydraulic machines (one hydraulic machine is used for punching and forming the plate, and the other hydraulic machine is used for fixing the edge pressing of the side edge of the plate), the liquid filling pressure is controlled through an ultrahigh pressure water system, the material flowing capacity is increased by smearing lubricating oil and the like, the uniformity of the wall thickness is controlled through reasonable matching of the punching pressure, the edge pressing force and the liquid filling pressure, and cracking caused by excessive thinning of the local wall thickness is prevented.
And fourthly, compensation of springback of the curved surface shell body.
And aiming at the shell body with the curved surface appearance, three-dimensional scanning is carried out on the formed shell body, the scanning outline is compared with the model outline to obtain compensation data, and springback compensation is carried out through die surface modification according to a certain compensation proportion to obtain the shell body after springback compensation.
And fifthly, processing the welding surface.
And the shell body after the springback compensation is subjected to a trimming process, and the width of the flange face is kept to be 2-5 mm and is used as a welding face during subsequent vacuum packaging.
Therefore, the invention provides a high-temperature-resistant ultrathin-wall packaging shell which comprises a shell main body, wherein the shell main body comprises a shell bottom and a shell top arranged opposite to the shell bottom, the shell top is a packaging opening, and a flange is arranged around the shell top; the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure. The invention also provides a forming method of the high-temperature-resistant ultrathin-wall packaging shell, which comprises the following steps: step one, selecting a high-temperature resistant thin plate material; step two, designing a packaging structure; step three, forming the main body of the ultrathin-wall shell; step four, compensation of springback of the main body of the ultrathin-wall shell; and step five, processing a welding surface.
Through the structural design, compared with the prior art, the invention has the following beneficial effects:
1. the high-temperature-resistant ultrathin-wall packaging shell provided by the invention adopts a flanged fillet transition box-shaped integrated structure, has light weight and high structural reliability, avoids stress concentration at a sharp corner and solves the problem of welding tearing;
2. the invention solves the problem of excessive thinning and rebound of local wall thickness caused by wall thickness effect through liquid-filled flexible forming and rebound compensation, and realizes the precise forming of the lightweight shell main body;
3. the invention realizes the integrated forming of the packaging structure, and has the advantages of short preparation process, low material performance loss, high reliability and long service life.
Based on the above scheme, one specific embodiment of the present invention is as follows:
first, a curved casing main structure sample having a projection size of 300mm × 300mm × 12mm and a curvature radius of R300 was molded by an integral molding method.
Then the following steps are carried out:
firstly, selecting high-temperature resistant sheet materials.
The material of the main body of the shell with the curved surface structure is GH4099 high-temperature alloy sheet material, the temperature resistance is above 900 ℃, and the wall thickness is 0.2mm.
And secondly, designing a high-temperature-resistant ultrathin-wall packaging structure.
The shell body of the curved surface structure is of a flanged fillet transition box-shaped integrated structure, the section is of a single-curvature convex flange structure, the curvature radius R is 300mm, and the depth of the shell body is 12mm. The top surface of casing main part sets up the flange and forms the flange face, and the flange department and the box bottom department of casing main part adopt the fillet to pass through, and the fillet transitional structure radius of flange department is R3mm, and the fillet transitional structure radius of box bottom department is R5mm, and the width of flange is 3mm.
And thirdly, forming the ultrathin-wall shell main body.
Through process test optimization, rectangular and round-cornered blanks are selected, and a 1.5kW laser cutting machine is adopted for blanking. And then, performing hydro-mechanical drawing by adopting 350-ton hydro-mechanical forming equipment, wherein the pressure of a working medium is 25MPa. The forming process parameters are as follows: the stamping force is 200 tons, the blank pressing force is 12 tons, the hydraulic support is 2MPa, and special drawing oil is used for lubrication. The curved box-shaped piece is formed by the first hydro-mechanical drawing, and the maximum reduction rate is controlled within 10 percent.
And fourthly, compensation of springback of the curved surface shell body.
And carrying out three-dimensional scanning on the formed curved box-shaped piece, and formulating a compensation scheme according to a rebound calculation result. The compensation scheme is as follows: the springback compensation is processed symmetrically, the compensation value in the middle of the box-shaped part is 0, and the maximum compensation at the front flange and the rear flange is 3.5mm (the compensation ratio is 1. And correspondingly changing the die surface according to the compensation scheme, and performing one-time deep drawing forming to obtain the springback compensated curved box-shaped part with the profile degree within 0.5mm.
And fifthly, processing the welding surface.
Adopting a 350-ton hydraulic press for trimming, wherein the trimming process parameters are as follows: the trimming force is 200 tons, and the edge pressing force is 0.25 ton. After the edge cutting process, the width of the flange is kept 3mm, and a curved surface shell main body structure sample piece is prepared, wherein the projection size of the sample piece is 300mm multiplied by 12mm, and the curvature radius of the sample piece is R300.
The above is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A high temperature resistant ultra-thin wall packaging shell is characterized in that,
the shell comprises a shell body, wherein the shell body comprises a shell bottom and a shell top arranged opposite to the shell bottom, the shell top is a packaging opening, and a flange is arranged around the shell top;
the high-temperature-resistant ultrathin-wall packaging shell is of a box-shaped integrated structure, the connecting part of the flange and the shell body is of a fillet transition structure, and the connecting part of the shell bottom of the shell body and the surrounding edge of the shell body is of the fillet transition structure.
2. The high temperature tolerant ultra thin-walled package housing of claim 1,
taking a central line of the shell body in the length direction as a symmetric center, wherein the shell bottom is of a downward-bent curved surface structure, the shell top is of a downward-bent curved surface structure, and the curvatures of the shell bottom and the shell top are consistent;
or, the center line of the width direction of the shell body is taken as a symmetric center, the shell bottom is of a downward-bending type curved surface structure, the shell top is of a downward-bending type curved surface structure, and the curvatures of the shell bottom and the shell top are consistent.
3. The high temperature tolerant ultra thin-walled package housing of claim 1,
the high-temperature-resistant ultrathin-wall packaging shell is made of high-temperature-resistant sheet metal, the temperature resistance range of the high-temperature-resistant sheet metal is 800-1100 ℃, and the thickness selection range is 0.1-0.5 mm;
preferably, the high-temperature resistant metal sheet is a high-temperature alloy or a titanium-aluminum-based intermetallic compound.
4. The high temperature tolerant ultra thin walled package housing of any of claims 1 to 3,
the depth range of the shell body is 10mm-25mm;
the radius size range of the fillet transition structure is R2mm-R8mm;
the width size range of the flange is 2mm-8mm.
5. A forming method of a high-temperature-resistant ultrathin-wall packaging shell is characterized by comprising the following steps:
selecting a high-temperature-resistant sheet material, wherein the temperature resistance range of the high-temperature-resistant sheet material is 800-1100 ℃, and the thickness selection range of the high-temperature-resistant sheet material is 0.1-0.5 mm;
designing a packaging structure, wherein the high-temperature-resistant ultrathin-wall packaging shell is a box-shaped integrated structure provided with a flange, and the high-temperature-resistant ultrathin-wall packaging shell adopts a fillet transition structure;
step three, forming the ultrathin-wall shell main body, and flexibly forming the high-temperature-resistant sheet material by adopting a hydro-mechanical deep drawing process;
step four, performing springback compensation on the ultrathin-wall shell main body, namely performing three-dimensional scanning on the ultrathin-wall shell main body formed in the step three, comparing the scanning outline with the model outline to obtain compensation data, and performing springback compensation through die surface modification;
and step five, welding surface treatment, namely performing edge cutting treatment on the ultrathin-wall shell main body subjected to springback compensation in the step four, and keeping the width size range of the flange surface to be 2-5 mm for welding in vacuum packaging.
6. The method of claim 5, wherein the step of forming the high temperature resistant ultra thin-walled encapsulation shell,
in the first step, the high-temperature resistant sheet material is a high-temperature alloy or a titanium-aluminum-based intermetallic compound;
preferably, the high-temperature resistant thin plate is subjected to laser cutting blanking.
7. The method for forming a high temperature ultra thin-walled package housing of claim 5,
in the second step, the high-temperature-resistant ultrathin-wall packaging shell is provided with a shell main body, a flange is arranged on the top surface of the shell main body, the connecting part of the flange and the shell main body is of a fillet transition structure, and the connecting part of the shell bottom of the shell main body and the surrounding edge of the shell main body is of a fillet transition structure;
the depth size range of the shell body is 10mm-25mm, the radius of the fillet transition structure is R2mm-R8mm, and the width size range of the flange is 2mm-8mm.
8. The method for forming a high temperature ultra thin-walled package housing of claim 5,
in the third step, the stamping force of the plate, the edge pressing force of the plate and the like are independently controlled through a double-acting hydraulic press, the hydraulic pressure is controlled through an ultrahigh pressure water system, and the hydro-mechanical deep drawing flexible forming of the plate is realized.
9. The method of claim 8, wherein the step of forming the ultra-thin wall package housing,
in the third step, lubricating oil is coated on the sheet material for increasing the flowing capacity of the material in the hydro-mechanical deep drawing flexible forming process.
10. The method for forming a high temperature ultra thin-walled package housing of claim 5,
in the fourth step, three-dimensional scanning is carried out on the formed ultrathin-wall shell main body, and a compensation scheme is formulated according to a rebound calculation result;
the compensation scheme formulated by the rebound calculation result is as follows: springback compensation is processed according to the symmetry, and ultra-thin wall casing main part length direction or width direction's middle part compensation numerical value is 0, and the biggest compensation numerical value of preceding back flange farthest end is 3.5mm, and the compensation proportion is 1:0.8, correspondingly changing the die surface according to the compensation scheme, and performing secondary deep drawing forming to obtain the ultra-thin wall shell main body subjected to springback compensation;
preferably, the profile of the ultra-thin walled housing body is within 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211468824.2A CN115722880A (en) | 2022-11-22 | 2022-11-22 | High-temperature-resistant ultrathin-wall packaging shell and forming method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211468824.2A CN115722880A (en) | 2022-11-22 | 2022-11-22 | High-temperature-resistant ultrathin-wall packaging shell and forming method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115722880A true CN115722880A (en) | 2023-03-03 |
Family
ID=85297552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211468824.2A Pending CN115722880A (en) | 2022-11-22 | 2022-11-22 | High-temperature-resistant ultrathin-wall packaging shell and forming method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115722880A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214711A (en) * | 2008-01-18 | 2008-07-09 | 谢一环 | Method for processing double curvature plastic plate shell with reinforcing mesh |
| RU2012138505A (en) * | 2012-09-07 | 2014-03-20 | Открытое акционерное общество "Конструкторское бюро химавтоматики" | METHOD FOR PRODUCING THIN-WALLED COMPLEX SHAPES |
| CN104615809A (en) * | 2015-01-20 | 2015-05-13 | 华侨大学 | Spring-back compensation method working out factor reversely |
| CN107175295A (en) * | 2017-07-07 | 2017-09-19 | 天津航天长征火箭制造有限公司 | A kind of 3350mm grades of ellipsoid melon valve liquid-filling shaping technique and its mould |
| CN107866491A (en) * | 2017-12-06 | 2018-04-03 | 哈尔滨工业大学 | A kind of aluminium alloy plate class member freezes manufacturing process |
| CN108994141A (en) * | 2018-07-20 | 2018-12-14 | 哈尔滨工业大学 | A kind of accurate compensation method of component hydroforming rebound based on liquid volume control |
| CN109692911A (en) * | 2018-12-10 | 2019-04-30 | 上海航天设备制造总厂有限公司 | A kind of large size toroidal shell part monolithic molding device and method |
| CN111112430A (en) * | 2019-12-16 | 2020-05-08 | 中国航发南方工业有限公司 | Composite compensation springback forming method for revolving body parts |
| CN111873481A (en) * | 2020-07-01 | 2020-11-03 | 西北工业大学 | Compensation method for composite material forming resilience and die with adjustable forming surface |
| CN111940583A (en) * | 2020-07-15 | 2020-11-17 | 大连理工大学 | Ultra-low temperature deep drawing forming method for aluminum alloy thin-wall curved surface part |
| CN112317896A (en) * | 2020-10-23 | 2021-02-05 | 航天特种材料及工艺技术研究所 | Integrated preparation method of vacuum packaging outer protection structure |
| CN113312700A (en) * | 2021-04-06 | 2021-08-27 | 中国第一汽车股份有限公司 | Method for calculating springback compensation value of high-strength plate stamping part |
-
2022
- 2022-11-22 CN CN202211468824.2A patent/CN115722880A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101214711A (en) * | 2008-01-18 | 2008-07-09 | 谢一环 | Method for processing double curvature plastic plate shell with reinforcing mesh |
| RU2012138505A (en) * | 2012-09-07 | 2014-03-20 | Открытое акционерное общество "Конструкторское бюро химавтоматики" | METHOD FOR PRODUCING THIN-WALLED COMPLEX SHAPES |
| CN104615809A (en) * | 2015-01-20 | 2015-05-13 | 华侨大学 | Spring-back compensation method working out factor reversely |
| CN107175295A (en) * | 2017-07-07 | 2017-09-19 | 天津航天长征火箭制造有限公司 | A kind of 3350mm grades of ellipsoid melon valve liquid-filling shaping technique and its mould |
| CN107866491A (en) * | 2017-12-06 | 2018-04-03 | 哈尔滨工业大学 | A kind of aluminium alloy plate class member freezes manufacturing process |
| CN108994141A (en) * | 2018-07-20 | 2018-12-14 | 哈尔滨工业大学 | A kind of accurate compensation method of component hydroforming rebound based on liquid volume control |
| CN109692911A (en) * | 2018-12-10 | 2019-04-30 | 上海航天设备制造总厂有限公司 | A kind of large size toroidal shell part monolithic molding device and method |
| CN111112430A (en) * | 2019-12-16 | 2020-05-08 | 中国航发南方工业有限公司 | Composite compensation springback forming method for revolving body parts |
| CN111873481A (en) * | 2020-07-01 | 2020-11-03 | 西北工业大学 | Compensation method for composite material forming resilience and die with adjustable forming surface |
| CN111940583A (en) * | 2020-07-15 | 2020-11-17 | 大连理工大学 | Ultra-low temperature deep drawing forming method for aluminum alloy thin-wall curved surface part |
| CN112317896A (en) * | 2020-10-23 | 2021-02-05 | 航天特种材料及工艺技术研究所 | Integrated preparation method of vacuum packaging outer protection structure |
| CN113312700A (en) * | 2021-04-06 | 2021-08-27 | 中国第一汽车股份有限公司 | Method for calculating springback compensation value of high-strength plate stamping part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101780507B (en) | Method for manufacturing deep square cylindrical metal shell | |
| CN107186034B (en) | The manufacturing device of compression moulding product | |
| CN104942117A (en) | Square cell case forming method | |
| US8505352B2 (en) | Method for producing hollow profiles having a longitudinal flange | |
| CN117299975A (en) | Complex titanium alloy part forming die and process | |
| CN115722880A (en) | High-temperature-resistant ultrathin-wall packaging shell and forming method thereof | |
| CN109127984A (en) | A kind of big tenon aluminium alloy vane upset blanking mold | |
| CN110681759B (en) | Universal electromagnetic forming device for plate-tube parts | |
| CN203500140U (en) | All aluminum fuel tank | |
| CN111014367A (en) | Long and thin arc shell and press forming method of long and thin polygonal double-arc shell | |
| CN207508048U (en) | A kind of Ф 3350mm ellipsoids melon valve normal direction hole projecting apertures mold | |
| CN216826105U (en) | High-efficient polymeric kettle with thin wall inner tube | |
| CN214533723U (en) | Aeroengine flow deflector | |
| CN214747413U (en) | Split type interface brazing plate heat exchanger | |
| CN112814948A (en) | Aeroengine flow deflector and manufacturing method thereof | |
| CN214120902U (en) | Composite heat radiation plate with pipeline structure | |
| JP5471182B2 (en) | Method for manufacturing metal can body | |
| CN213360209U (en) | Major-minor type oil pan | |
| CN210632874U (en) | Forming device for forging circular ring | |
| CN110052795A (en) | The processing method of oval tube fin heat exchanger | |
| CN219418759U (en) | Iron core silicon steel sheet welding frame | |
| CN217252071U (en) | A integrative mold core die block mould for punching press of monolithic jar | |
| CN212469445U (en) | Support accessory forming die | |
| CN109870064A (en) | A kind of soldering formula main slice of radiator | |
| CN220687769U (en) | Riveting structure of support tearing material and condenser thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |