CN114704535A - Connecting structure and connecting process for plates made of dissimilar materials - Google Patents
Connecting structure and connecting process for plates made of dissimilar materials Download PDFInfo
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- CN114704535A CN114704535A CN202210332841.7A CN202210332841A CN114704535A CN 114704535 A CN114704535 A CN 114704535A CN 202210332841 A CN202210332841 A CN 202210332841A CN 114704535 A CN114704535 A CN 114704535A
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- plate
- plate body
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- cavity
- plates
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- 239000000463 material Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000008569 process Effects 0.000 title claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 7
- 238000005304 joining Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 4
- 239000004917 carbon fiber Substances 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a connecting structure and a connecting process of plates made of dissimilar materials, and belongs to the field of connection of plates made of different materials. This connection structure includes: the first plate body is made of a first material and provided with a first opening; the second plate body is made of a second material and provided with a first bulge, and the first bulge penetrates through the first open hole until being abutted against the second side plate face of the first plate body from the first side plate face of the first plate body. The invention realizes the lock catch connection of the first plate body and the second plate body, and is particularly suitable for the connection between metal plates such as steel/aluminum and the like and composite materials such as carbon fiber composite material/SMC composite material plates.
Description
Technical Field
The invention relates to the field of connection of different materials, in particular to a connection structure and a connection process of dissimilar material plates.
Background
With the great trend of development of safe, environment-friendly and energy-saving automobiles, materials of the automobile body are gradually converted from the traditional steel automobile body to the steel-aluminum mixed automobile body and further to the steel/aluminum/composite material mixed automobile body. The change of the materials for the vehicle body structure is accompanied with the requirement of the connection technology, the traditional steel-to-steel connection mainly adopts the steel resistance spot welding technology, the aluminum-to-aluminum connection mainly adopts the aluminum resistance spot welding technology, and the steel-to-aluminum connection mainly adopts the SPR self-piercing riveting and FDS self-tapping screw connection technology.
With the development of composite materials, automotive body materials have been transformed into steel/aluminum/composite hybrid bodies. At present, the technical difficulty of connection between metals such as steel/aluminum and composite materials such as carbon fiber composite materials/SMC composite materials is that the two materials to be connected have large difference of physical properties, so that the two materials cannot be connected by adopting traditional welding technologies such as resistance spot welding, laser welding and the like.
Disclosure of Invention
Therefore, the invention provides a connecting structure of dissimilar material plates between metal and composite material and a connecting process thereof in order to meet the connecting requirement between metal such as steel/aluminum and the composite material such as carbon fiber composite material/SMC composite material.
In order to solve the technical problems, the invention provides the following technical scheme:
a coupling structure of dissimilar material plates, comprising: the first plate body is made of a first material and provided with a first opening; the second plate body is made of a second material and provided with a first bulge, and the first bulge penetrates through the first open hole from the first side plate surface of the first plate body until the first bulge abuts against the second side plate surface of the first plate body.
In some embodiments of the invention, the first protrusion is integrally formed on the second board body, and includes an annular sleeve portion located in the first opening and a hook cover portion abutting against the second side board surface of the first board body.
In some embodiments of the present invention, the hooking cover is formed in a flat plate structure or an arc plate structure.
In some embodiments of the invention, the first plate body is a composite plate and the second plate body is a metal plate.
In some embodiments of the present invention, the first plate is a multilayer plate, the first opening of the multilayer plate is penetrated, and the first protrusion of the second plate penetrates through the first opening from the first side plate surface of the multilayer plate to abut against the second side plate surface of the multilayer plate.
The invention also provides a connecting process of the dissimilar material plates, which comprises the following steps:
attaching the first plate body and the second plate body and fixing the first plate body and the second plate body through a clamp;
connecting a stamping cylinder body on the surface, far away from the first plate body, of the second plate body, wherein the stamping cylinder body and the second plate body form a sealed cavity, and filling hydraulic oil into the sealed cavity;
arranging a hydraulic female die on the side of the first plate body far away from the side of one side plate of the second plate body, wherein a cavity of the hydraulic female die surrounds a first hole of the first plate body;
and the pressure head extends into the sealed cavity and applies pressure to the hydraulic oil, and the second plate body is pressed into the cavity of the hydraulic female die under the action of the hydraulic oil to form a first bulge.
In some embodiments of the invention, the pressure head moves linearly along the sealed cavity under the action of a driving device, the driving device is a hydraulic driving device, the hydraulic driving device is controlled to move the pressure head to the upper surface of the hydraulic oil and apply a first set pressure value to the upper surface of the hydraulic oil, and the pressure relief treatment is performed after the pressure head is maintained for a first set time.
In some embodiments of the invention, the cross-sectional area of the cavity of the hydraulic die is greater than the diameter of the first opening.
In some embodiments of the present invention, the cavity of the hydraulic female die is formed in an inverted T shape or a dovetail shape, and the bottom surface of the cavity is a plane.
In some embodiments of the present invention, the cavity of the hydraulic female die is formed by a die holder and a core, and after the first protrusion is formed, the core is removed, and then the assembly of the first plate and the second plate is taken out.
Compared with the prior art, the technical scheme of the invention has the following technical effects:
in the connecting structure of the dissimilar material plates, the lock catch connecting structure between the first plate body and the second plate body is formed by matching the first bulge of the second plate body and the first open pore of the first plate body, so that the mechanical connection of two dissimilar materials is formed, and the connection of 2-layer plates, 3-layer plates and multi-layer plates can be realized by adopting the connecting structure. In addition, because the connecting structure does not have additional connecting units such as blind end rivet rivets, the production cost of connected single pieces can be effectively reduced.
In the connecting process of the dissimilar material plates, the pressure head acts on hydraulic oil, the hydraulic oil acts on the second plate body, the second plate body enters the cavity of the hydraulic female die after passing through the first opening of the first plate body, the local hydraulic expansion structure of the second plate body is realized, the lock catch connection of the first plate body and the second plate body is formed, the second plate body can be better matched with the cavity of the hydraulic female die, and the reliable connection of the first plate body and the second plate body is realized. The automatic connection is realized by the pressurization of the pressure mechanism and the matching of the female die, so that the connection time of each connection point is only 2-3 seconds, and the connection efficiency is high.
Drawings
The objects and advantages of the present invention will be understood by the following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic structural view of an embodiment of a connection structure of sheets of dissimilar materials according to the present invention;
FIG. 2 is a schematic structural diagram of one embodiment of the joining process of the dissimilar material plates according to the present invention;
fig. 3 is another structural schematic diagram of an embodiment of the joining process of the dissimilar material plates according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 shows a specific embodiment of the connection structure of sheets of dissimilar materials according to the present invention, which includes: a first plate body 10 made of a first material, in particular a composite material, such as a carbon fiber composite or SMC composite, and a second plate body 20 made of a second material; the second material is a metal material, such as a metal material of steel/aluminum. The first plate body 10 is provided with a first open hole 11, the second plate body 20 is provided with a first protrusion 21, and the first protrusion 21 penetrates through the first open hole 11 to abut against the second side plate surface of the first plate body 10 from the first side plate surface of the first plate body 10.
The connecting structure forms a locking structure between the first plate body 10 and the second plate body 20 through the matching of the first protrusion 21 and the first opening 11, so that two different materials are mechanically connected, and the connection of 2-layer plates, 3-layer plates and multi-layer plates can be realized. And, because there is no extra connecting unit such as blind end rivet, can reduce the production cost of the single piece connected effectively. The connecting structure can be realized by matching the pressurization of the pressure mechanism with the female die, the automatic connection can be realized, and the connecting efficiency is high.
Specifically, the first protrusion 21 is integrally formed on the second board 20, and includes an annular sleeve portion 21a located in the first opening 11 and a hook cover portion 21b abutted to the second side board surface of the first board 10. Because the first protrusion 21 is integrally formed on the second plate 20, it can be formed under the action of the pressure mechanism, and the annular sleeve portion 21a and the hooking cover portion 21b enable the first plate 10 and the second plate 20 to form a locking structure, so that the connection is simple and reliable.
In particular, in one embodiment, the hooking cover 21b is shaped as an arc-shaped plate structure, in particular, forming an arc projecting towards the outside. In another specific embodiment, the hook cover 21b is formed as a flat plate, and the connection position between the first plate 10 and the second plate 20 has no protruding structure, so that the connection plate has better integrity.
Specifically, according to different application occasions, the first plate 10 is provided with two or more layers, and the first plate 10 of the plurality of layers is formed with the first openings 11 that are communicated with each other. The second board body 20 is provided with two or three layers, the first protrusions 21 of the second board bodies 20 of a plurality of layers are matched with each other, specifically, the first protrusions 21 of the adjacent second board bodies 20 are abutted against each other and penetrate through the first openings 11 of the first board bodies 10 to realize locking connection with the first openings.
The invention also provides a specific implementation mode of the connecting process of the dissimilar material plates, as shown in fig. 2 and fig. 3, the connecting process comprises the following steps:
s1, attaching a first plate body 10 to a second plate body 20 and fixing the first plate body and the second plate body through a clamp;
s2, connecting a stamping cylinder 30 to the plate surface of the second plate body 20 on the side far away from the first plate body 10, forming a sealed cavity by the stamping cylinder 30 and the second plate body 20, and filling hydraulic oil 40 into the sealed cavity;
s3, arranging a hydraulic female die 50 on the side, away from the second board body 20, of the first board body 10 from a side plate surface, wherein a cavity of the hydraulic female die 50 surrounds the first opening 11 of the first board body 10;
s4, a pressure head 60 extends into the sealed cavity and applies pressure to the hydraulic oil 40, and the second plate body 20 is pressed into the cavity of the hydraulic female die 50 under the action of the hydraulic oil 40 to form a first protrusion 21.
Among the above-mentioned connection technology of first plate body 10 and second plate body 20, act on hydraulic oil 40 through pressure head 60, in order to indirectly act on second plate body 20, make second plate body 20 get into the die cavity of hydraulic pressure die 50 behind the first trompil 11 of first plate body 10, the local hydraulic pressure type structure that rises of second plate body 20 has been realized, it is connected with the hasp of second plate body 20 to form first plate body 10, compare the mode that pressure head 60 direct action made it be connected with first plate body 10 on the second plate body 20, act on the mode of second plate body 20 through hydraulic oil 40, can make second plate body 20 can match with the die cavity of hydraulic pressure die 50 better, realize the reliable connection of first plate body 10 and second plate body 20. Automatic connection is realized through the pressurization of the pressure mechanism and the matching of the female die, so that the connection time of each connection point is only 2-3 seconds, and the connection efficiency is high.
Specifically, the ram 60 moves linearly along the sealed cavity under the action of a driving device 70, and more specifically, the driving device 70 is a hydraulic driving device 70, and the hydraulic driving device 70 is controlled to move the ram 60 to the upper surface of the hydraulic oil 40 and apply a first set pressure value to the upper surface, and the pressure relief processing is performed after the pressure is maintained for a first set time. The hydraulic driving device 70 acts on the pressing head 60, and the system pressure of the hydraulic system and the acting time of the pressing head 60 can be controlled to ensure that the second plate body 20 is inserted into the cavity of the hydraulic female die 50, so that the connection reliability between the first plate body 10 and the second plate body 20 is good.
Specifically, the cross-sectional area of the cavity of the hydraulic female die 50 is larger than the diameter of the first opening 11, so as to ensure that the cross-sectional area of the first protrusion 21 after the second plate 20 passes through the first opening 11 and enters the cavity of the hydraulic female die 50 is increased, and a partial area of the first protrusion 21 abuts against the first plate 10 to form a locking connection. More specifically, the cavity of the hydraulic die 50 is shaped like an inverted T or a dovetail, and the bottom surface of the cavity is a plane.
Specifically, the cavity of the hydraulic female die 50 is formed by a die holder and a core, after the first protrusion 21 is formed, the driving device 70 controls the pressure head 60 to release pressure, the pressure head 60 and the stamping cylinder 30 are moved away from the second plate 20, and at this time, after the core is removed, the assembly of the first plate 10 and the second plate 20 is taken out.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the present invention.
Claims (10)
1. A connection structure of dissimilar material panel, characterized by that, it includes:
the first plate body is made of a first material and provided with a first opening;
the second plate body is made of a second material and provided with a first bulge, and the first bulge penetrates through the first open hole from the first side plate surface of the first plate body until being abutted against the second side plate surface of the first plate body.
2. A connecting structure of plates made of dissimilar materials according to claim 1, wherein the first protrusion is integrally formed on the second plate body, and includes an annular sleeve portion located in the first opening and a hook cover portion abutting against the second side plate surface of the first plate body.
3. A coupling structure of a heterogeneous material plate according to claim 2, wherein the hooking cover portion is formed in a flat plate structure or an arc plate structure.
4. A connecting structure of plates of dissimilar materials according to claim 1, wherein said first plate body is a composite plate, and said second plate body is a metal plate.
5. A connection structure of plates made of dissimilar materials according to claim 1, wherein the first plate is configured as a multilayer plate, the first opening of the multilayer plate is through, and the first protrusion of the second plate passes through the first opening from a first side plate surface of the multilayer plate until abutting against a second side plate surface of the multilayer plate.
6. The connecting process of the dissimilar material plates is characterized by comprising the following steps:
attaching the first plate body and the second plate body and fixing the first plate body and the second plate body through a clamp;
connecting a stamping cylinder body on the surface, far away from the first plate body, of the second plate body, wherein the stamping cylinder body and the second plate body form a sealed cavity, and filling hydraulic oil into the sealed cavity;
arranging a hydraulic female die on the side of the first plate body far away from the side of one side plate of the second plate body, wherein a cavity of the hydraulic female die surrounds a first hole of the first plate body;
and the pressure head extends into the sealed cavity and applies pressure to the hydraulic oil, and the second plate body is pressed into the cavity of the hydraulic female die under the action of the hydraulic oil to form a first bulge.
7. A joining process of dissimilar material plates according to claim 6, wherein the ram is linearly moved along the sealed cavity by a driving device, the driving device is a hydraulic driving device, the hydraulic driving device is controlled to move the ram to the upper surface of the hydraulic oil and apply a first set pressure value to the hydraulic oil, and the pressure relief treatment is performed after the hydraulic driving device is maintained for a first set time.
8. A joining process of sheets of dissimilar materials according to claim 6, wherein the cross-sectional area of the cavity of said hydraulic die is larger than the diameter of said first opening.
9. A joining process of plates made of dissimilar materials according to claim 8, wherein a cavity of the hydraulic female die is shaped in an inverted T shape or a dovetail shape, and a bottom surface of the cavity is a plane.
10. A joining process of plates of dissimilar materials according to claim 6, wherein a cavity of said hydraulic female die is formed by a die holder and a core, and after said first projection is formed, said core is removed, and then said assembly of said first plate and said second plate is taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210332841.7A CN114704535A (en) | 2022-03-31 | 2022-03-31 | Connecting structure and connecting process for plates made of dissimilar materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210332841.7A CN114704535A (en) | 2022-03-31 | 2022-03-31 | Connecting structure and connecting process for plates made of dissimilar materials |
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| Publication Number | Publication Date |
|---|---|
| CN114704535A true CN114704535A (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210332841.7A Pending CN114704535A (en) | 2022-03-31 | 2022-03-31 | Connecting structure and connecting process for plates made of dissimilar materials |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4419159A1 (en) * | 1994-06-01 | 1995-12-07 | Deutsche Forsch Luft Raumfahrt | Rivet=shaped connector used for plastics and or brittle components |
| US20050210654A1 (en) * | 2004-03-26 | 2005-09-29 | Nissan Motor Co., Ltd. | Method and apparatus for joining plates by caulking |
| CN102764808A (en) * | 2012-07-24 | 2012-11-07 | 哈尔滨工业大学 | Hydraulic forming device and method of reducing cylindrical part |
| CN105382485A (en) * | 2015-11-27 | 2016-03-09 | 合肥金海康五金机械制造有限公司 | Connecting method for metal thin plate and metal thick plate |
| CN105499389A (en) * | 2013-06-28 | 2016-04-20 | 吴小再 | Booster stamping mold |
-
2022
- 2022-03-31 CN CN202210332841.7A patent/CN114704535A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4419159A1 (en) * | 1994-06-01 | 1995-12-07 | Deutsche Forsch Luft Raumfahrt | Rivet=shaped connector used for plastics and or brittle components |
| US20050210654A1 (en) * | 2004-03-26 | 2005-09-29 | Nissan Motor Co., Ltd. | Method and apparatus for joining plates by caulking |
| CN102764808A (en) * | 2012-07-24 | 2012-11-07 | 哈尔滨工业大学 | Hydraulic forming device and method of reducing cylindrical part |
| CN105499389A (en) * | 2013-06-28 | 2016-04-20 | 吴小再 | Booster stamping mold |
| CN105382485A (en) * | 2015-11-27 | 2016-03-09 | 合肥金海康五金机械制造有限公司 | Connecting method for metal thin plate and metal thick plate |
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