CN107234327B - Sheet metal stings weldering composite connecting device and method - Google Patents
Sheet metal stings weldering composite connecting device and method Download PDFInfo
- Publication number
- CN107234327B CN107234327B CN201710389597.7A CN201710389597A CN107234327B CN 107234327 B CN107234327 B CN 107234327B CN 201710389597 A CN201710389597 A CN 201710389597A CN 107234327 B CN107234327 B CN 107234327B
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- Prior art keywords
- pressure rod
- compact heap
- plate
- sheet metal
- upper metal
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- 239000002184 metal Substances 0.000 title claims abstract description 156
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- 239000000463 material Substances 0.000 claims abstract description 17
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000003292 glue Substances 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 5
- 239000010931 gold Substances 0.000 claims description 5
- 229910052737 gold Inorganic materials 0.000 claims description 5
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- 229910000765 intermetallic Inorganic materials 0.000 claims description 4
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- 208000002193 Pain Diseases 0.000 claims description 2
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- 238000006056 electrooxidation reaction Methods 0.000 abstract description 5
- 238000005272 metallurgy Methods 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000003870 refractory metal Substances 0.000 abstract description 2
- 238000005056 compaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
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- 238000005336 cracking Methods 0.000 description 2
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- 238000005304 joining Methods 0.000 description 2
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- 230000008018 melting Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/025—Setting self-piercing rivets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
- B21J15/08—Riveting by applying heat, e.g. to the end parts of the rivets to enable heads to be formed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
- B23K11/004—Welding of a small piece to a great or broad piece
- B23K11/0066—Riveting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/12—Copper or alloys thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/15—Magnesium or alloys thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention belongs to thin-slab structure interconnection techniques, it discloses a kind of sheet metal and stings weldering composite connecting device and method, the device includes the cavity plate of solid cylinder metal compaction block, the pressure rod above connected sheet metal and lower section, and servo pressurization device matched with cavity plate with pressure rod and power supply；This method is pressed into using compact heap and is connected sheet metal, makes to form mechanical self-latching between two kinds of different metal plates；Under the premise of pressure rod keeps the pressure applied to connected sheet metal and compact heap, electric current is applied to connected region by pressure rod and cavity plate by power supply, make compact heap and connected sheet metal local fusing and generate metallurgical connection, ultimately forms " metallurgy-is mechanical " composite joint connector.The present invention connect plate generation mechanical self-latching with metallurgy, to improve the quality of connection of low-melting-point metal Yu refractory metal dissimilar material, reduces the two interface compound layer thickness, improves the mechanical property of connector, avoid electrochemical corrosion.
Description
Technical field
The invention belongs to thin-slab structure interconnection technique fields, in particular to one kind makes plate generate mechanical self-latching
The sheet metal Joining Technology being connect with metallurgy.
Background technique
By rational design, it is applied to variety classes, the light-alloy of intensity rank, steel etc. at vehicle body different parts,
Body lightening may be implemented, reduce fuel consumption and exhaust emissions.
Dissimilar Materials Aluminium is connected using resistance spot welding, it is inevitable that thicker intermetallic compound is generated in aluminium/steel interface
Layer destroys joint mechanical property.Dissimilar Materials Aluminium is connected using self-piercing riveting, since base material mechanical property difference is larger, is held
It is also easy to produce the defective workmanships such as cracking, hole；In addition, self-piercing riveting technique uses steel rivet, if being pressed into from aluminum alloy side workpiece
Rivet then forms primary battery in subsequent use process, makes that serious electrochemical corrosion locally occurs；And steel rivet and aluminium
Alloy rigidity differs greatly, so that connector is described in receiving external load time-varying easily concentrates on rivet/aluminium alloy interface, so that
Connector destruction, poor toughness under the effect of lower external load.
Summary of the invention
The technical problem to be solved in the present invention is that providing a kind of sheet metal stings weldering composite connecting device and method, it can
Make plate generate mechanical self-latching to connect with metallurgy, to improve the connection matter of low-melting-point metal Yu refractory metal dissimilar material
Amount.
In order to solve the above-mentioned technical problem, the present invention is achieved by technical solution below:
A kind of sheet metal stings weldering composite connecting device, the pressure rod including being located above upper metal plate and under being located at
Cavity plate below portion's sheet metal, the pressure rod and cavity plate coaxial arrangement, the pressure rod are connected to servo pressurization dress
It sets and power supply, the cavity plate is all connected to the power supply；Compression is provided between the pressure rod and the upper metal plate
Block, the compact heap are solid cylinder metal object, for making the upper metal plate and lower part gold of different melting points
Belong to and forms mechanical self-latching between plate.
Preferably, the compact heap is same or similar with the chemical component of the upper metal plate, wherein close refer to
The weight percentage difference of each element is less than or equal to 5% in the chemical component table of comparisons of the two.
Preferably, the power supply is capable of providing average anode current and pulse output circuit.
Preferably, the fusing point of the upper metal plate is less than the lower metal plates.
Preferably, macromolecular structure glue is coated between the upper metal plate and the lower metal plates.
Preferably, the macromolecular structure glue is epoxy resin structural adhesive or polyether-ether-ketone structure glue.
A kind of sheet metal that stinging weldering composite connecting device using above-mentioned sheet metal stings weldering composite connecting method, including such as
Lower step:
(1) preparation stage:
The compact heap, the upper metal plate, the lower metal plates are sequentially placed from top to bottom in described recessed
On mould, the pressure rod is located at initial position；
(2) the snap-in stage:
The servo pressurization device drives the pressure rod to move down, make the pressure rod, the compact heap, it is described on
Portion's sheet metal, the lower metal plates and the cavity plate contact with each other；Then the power supply by the pressure rod and
The cavity plate applies high-frequency direct-current to the circuit that the compact heap, the upper metal plate, the lower metal plates form
Pulse current, while the pressure rod continues to push, so that the compact heap is engaged with the upper metal plate, the top
Sheet metal is engaged with the lower metal plates and forms mechanical self-latching；
(3) stage is welded:
The power supply stops applying high-frequency direct-current pulse current, and the pressure rod continues to keep to the compact heap, described
The pressure that upper metal plate, the lower metal plates apply, and the power supply passes through the pressure rod and the cavity plate
Apply DC current to connected region, it is common molten to be formed to make the compact heap and the upper metal plate local fusing
Pond；The power supply stops applying DC current, and the common molten pool passes through with the lower metal plates in natural cooling process
Intermetallic compound thin layer is formed in interface and completes metallurgical connection；Finally make the upper metal plate and lower part gold
Belong to plate and forms " metallurgy-is mechanical " composite joint connector；
(4) separation phase:
The power supply stops being powered, and the subsequent pressure rod moves up, and returns to the initial position of step (1), is next connection
Circulation is ready.
Preferably, in step (1), there is coating macromolecule knot between the upper metal plate and the lower metal plates
Structure glue；After step (4), the upper metal plate, the lower metal plates after connection are toasted, so that the height
Molecular structure glue is cured.
Preferably,
The baking temperature is 150 degrees Celsius, and baking time is half an hour.
Preferably, in step (2), the peak value of the high-frequency direct-current pulse current is 0.5~4kA, frequency range is 50~
5000Hz；The loading velocity of the pressure rod is 1~500mm/s；The pressure that the pressure rod applies is 10kN~30kN；Step
(3) in, the DC current is 2~20kA, and the pressure that the pressure rod applies is 10kN~30kN.
The beneficial effects of the present invention are:
Sheet metal of the invention stings weldering composite connecting device and method, makes to be connected metal plate using electro plastic effect
Effectively softening occurs for material, so that packing material is more readily pressed into sheet metal and is connected region, compact heap, two connected metal plates
Occlusion occurs between material mutually and forms mechanical self-latching；Using with the side material that be connected sheet metal chemical component same or similar
Material is conducive to reduce dissimilar metal interface compound layer thickness, the final mechanical property for improving connector as compact heap；Due to
The chemical component of compact heap and connected sheet metal are close, and cooperate and coat high score at two connected sheet metal fitting positions
Minor structure glue avoids connector from forming primary battery during subsequent military service, that is, avoids electrochemical corrosion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that sheet metal provided by the present invention stings weldering composite connecting device；
Fig. 2 is that sheet metal provided by the present invention stings weldering composite connecting method process schematic；
Wherein, (a) is the preparation stage；It (b) is the snap-in stage；It (c) is the welding stage；It (d) is separation phase.
In figure: 1, pressure rod；2, compact heap；3, upper metal plate；4, lower metal plates；5, cavity plate.
Fig. 3 is the actual size schematic diagram of each component in embodiment provided by the present invention；
Fig. 4 is 10 times of amplification Stereo microscope photos for being connected workpiece partial cross section.
Specific embodiment
For that can further appreciate that summary of the invention of the invention, feature and effect, the following examples are hereby given, and cooperates attached drawing
Detailed description are as follows:
As shown in Figure 1, present embodiment discloses a kind of sheet metals to sting weldering composite connecting device, mainly include pressure rod 1,
Compact heap 2, upper metal plate 3, lower metal plates 4, cavity plate 5.
Connected upper metal plate 3 and lower metal plates 4 are made of the metal material of different melting points, can be aluminium
The materials such as alloy, magnesium alloy, copper alloy, mild steel, high-strength steel.When being connected using apparatus and method of the present invention, with top gold
The fusing point for belonging to plate 3 is less than lower metal plates 4 and is preferred, in this way in subsequent energization welding stage compact heap 2 and upper metal plate
Material 3 melts, and lower metal plates 4 keep solid-state simultaneously.It can also be between upper metal plate 3 and lower metal plates 4
Macromolecular structure glue is applied before connection, thus by the different upper metal plate 3 of chemical component and lower metal plates 4 every
It opens, avoids forming primary battery in subsequent use process and causing electrochemical corrosion；Available macromolecular structure glue includes ring
Oxygen resin structure glue and polyether-ether-ketone structure glue etc..
Pressure rod 1 is located at 3 top of upper metal plate, and pressure rod 1 is separately connected with servo pressurization device and power supply, and collection adds
Pressure and lifetime of resistance spot welding electrode function integration.Power supply can provide average anode current and pulse output circuit to pressure rod 1, according to
Specific process switching uses.
Cavity plate 5 is located at 4 lower section of lower metal plates, is coaxially disposed with pressure rod 1.Cavity plate 5 connects to power supply, and power supply can be right
Cavity plate 5 provides average anode current and pulse output circuit, is switched according to specific process and is used.
Compact heap 2 is set between pressure rod 1 and upper metal plate 3, be can connect in 1 lower section of pressure rod or is placed
Above upper metal plate 3.Compact heap 2 be solid cylinder metal object, for be pressed into upper metal plate 3 and by top gold
Belong to 3 part of plate and be pressed into lower metal plates 4, to make to be formed machinery between upper metal plate 3 and lower metal plates 4 certainly
Lock.Compact heap 2 should be same or similar with the chemical component of upper metal plate 3, and wherein chemical component is identical both refers to
Each element composition and weight percentage are completely the same in the chemical component table of comparisons, the chemistry that chemical component is close both to be referred at
When dividing the composition of each element in the table of comparisons identical or different, the weight percentage difference of each element is less than or equal to 5%.
Pressure rod 1, compact heap 2, cavity plate 5 size should meet the requirement for being capable of forming mechanical self-latching, the requirement is in mold
Field belongs to the prior art, and details are not described herein again.As shown in figure 3, pressure rod 1 is cylindrical structure, diameter in the present embodiment
It is highly 50mm for 20mm, end face is the spherical surface of radius 50mm；Compact heap 2 is solid cylinder structure, and diameter 6mm is high
Degree is 2mm；Contain fluted, depth of groove 2mm, the groove that inside grooves are also 0.5mm containing radius at 5 center of cavity plate.
As shown in Fig. 2, weldering composite connecting method is stung using the sheet metal that above-mentioned sheet metal stings weldering composite connecting device,
Itself specific steps are as follows:
The material of compact heap 2 is 5052 aluminum alloy plate materials, and upper metal plate 3 is 5052 aluminum alloy plate materials (thickness
1.5mm), lower metal plates 4 are DQSK carbon sheet (thickness 0.8mm).
(1) preparation stage:
Compact heap 2, upper metal plate 3, lower metal plates 4 are sequentially placed from top to bottom on cavity plate 5, pressure rod 1
There is the gap for placing compact heap 2, upper metal plate 3 and lower metal plates 4 between initial position, with cavity plate 5；
Wherein it is possible to macromolecular structure glue is applied before placement between upper metal plate 3 and lower metal plates 4.
(2) the snap-in stage:
Servo pressurization device driving pressure rod 1 moves down, and makes pressure rod 1, compact heap 2, upper metal plate 3, lower part
Sheet metal 4 and cavity plate 5 contact with each other；
Then power supply is made up of pressure rod 1 and cavity plate 5 to compact heap 2, upper metal plate 3, lower metal plates 4
Circuit applies high-frequency direct-current pulse current, and the peak value of high-frequency direct-current pulse current is 2kA, frequency range 2000Hz, when energization
Between be 200ms；
Pressure rod continues to push simultaneously with the pressure of the loading velocity of 50mm/s, 20kN, and pressing time 200ms will be pressed
Tight block 2 is pressed into upper metal plate 3 and lower metal plates 4, so that compact heap 2 is engaged with upper metal plate 3, upper metal
Plate 3 is engaged with lower metal plates 4 and forms mechanical self-latching；
Compact heap 2 and upper metal plate 3, lower metal plates 4 generate electro plastic effect as a result, improve and are connected
The generation probability of the defects of maximum plastic deformation amount of sheet metal, reduction cracking, hole.Due to caused by electro plastic effect
Flow of metal drag reduce, form upper metal plate 3 and lower metal plates 4 than conventional in local modified areas
The riveting occlusion deeper mechanical self-latching of depth, improves the anti-external applied load damage capability of connector.
If selection applies macromolecule knot between upper metal plate 3 and lower metal plates 4 in Connection Step (1)
Structure glue, then macromolecular structure glue will arrange under the effect of the pressure of pressure rod 1 in connected region, pass through electric current.
(3) stage is welded:
Pressure rod 1 continues to keep the pressure for the 20kN for applying compact heap 2, upper metal plate 3, lower metal plates 4
600ms；
And power supply applies DC current to connected region by pressure rod 1 and cavity plate 5, DC current 15kA,
Conduction time is 300ms.
Compact heap 2 and 3 local fusing of upper metal plate are as a result, to form common molten pool；Power supply stops applying straight later
Galvanic electricity stream, the common molten pool and lower metal plates 4 are by forming intermetallic compound in interface in natural cooling process
Thin layer and complete metallurgical connection；Since compact heap 2 and upper metal plate 3, lower metal plates 4 have formed mechanical self-latching,
Therefore, final upper metal plate 3 and lower metal plates 4 form " metallurgy-is mechanical " composite joint connector, due to mechanical self-latching
The stress condition (tensile stress component increases, shear stress component reduce) of metallurgical bonding thin layer can be improved, metallurgical bonding can be to prevent
Only low load caused by the self-locking combination of simple mechanical removes situation, the final toughness for improving connector.
(4) separation phase:
Power supply stops being powered, and subsequent pressure rod 2 moves up, and returns to the initial position of step (1), carries out for next connection circulation
Prepare.
(5) stage is toasted:
If macromolecule knot is coated between upper metal plate 3 and lower metal plates 4 before implementing Joining Technology
Structure glue, then also needed after (4) step to after connection upper metal plate 3 and lower metal plates 4 toast so that high
Molecular structure glue is cured；Baking temperature is 150 degrees Celsius, and baking time is half an hour.
By upper metal plate 3 and lower metal plate that chemical component is different after macromolecular structure glue is cured as a result,
Material 4 separates, while compact heap 2 is same or similar with 3 chemical component of upper metal plate directly contacted, avoids in subsequent use
It forms primary battery in the process and causes electrochemical corrosion.
The optional range of parameter in above-mentioned steps is as follows:
In step (2), the peak value of high-frequency direct-current pulse current is 0.5~4kA, and frequency range is 50~5000Hz；Pressurization
The loading velocity of bar 2 is 1~500mm/s；The pressure that pressure rod 2 applies is 10kN~30kN；
In step (3), DC current is 2~20kA, and the pressure that pressure rod 2 applies is 10kN~30kN.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of specific transformation, within these are all belonged to the scope of protection of the present invention.
Claims (7)
1. a kind of sheet metal stings weldering composite connecting device, which is characterized in that including being located at the pressurization above upper metal plate
Bar and the cavity plate below lower metal plates, the pressure rod and cavity plate coaxial arrangement, the pressure rod are connected to
Servo pressurization device and power supply, the cavity plate are all connected to the power supply；Between the pressure rod and the upper metal plate
It is provided with compact heap, the compact heap is solid cylinder metal object, for making the compact heap and the upper metal plate
Occlusion, the upper metal plate are engaged with the lower metal plates and form mechanical self-latching；
The compact heap is same or similar with the chemical component of the upper metal plate, wherein the close chemistry both referred at
The weight percentage difference of each element in the table of comparisons is divided to be less than or equal to 5%；
Macromolecular structure glue is coated between the upper metal plate and the lower metal plates.
2. a kind of sheet metal according to claim 1 stings weldering composite connecting device, which is characterized in that the power supply can
Average anode current and pulse output circuit are provided.
3. a kind of sheet metal according to claim 1 stings weldering composite connecting device, which is characterized in that the upper metal
The fusing point of plate is less than the lower metal plates.
4. a kind of sheet metal according to claim 1 stings weldering composite connecting device, which is characterized in that the macromolecule knot
Structure glue is epoxy resin structural adhesive or polyether-ether-ketone structure glue.
5. a kind of sheet metal for stinging weldering composite connecting device using the sheet metal as described in any one of claim 1-4 stings weldering
Composite connecting method, which comprises the steps of:
(1) preparation stage:
The compact heap, the upper metal plate, the lower metal plates are sequentially placed from top to bottom on the cavity plate,
The pressure rod is located at initial position；
(2) the snap-in stage:
The servo pressurization device drives the pressure rod to move down, and makes the pressure rod, the compact heap, top gold
Belong to plate, the lower metal plates and the cavity plate to contact with each other；Then the power supply passes through the pressure rod and described
Cavity plate applies high-frequency direct-current pulse to the circuit that the compact heap, the upper metal plate, the lower metal plates form
Electric current, while the pressure rod continues to push, so that the compact heap is engaged with the upper metal plate, the upper metal
Plate is engaged with the lower metal plates and forms mechanical self-latching；
(3) stage is welded:
The power supply stops applying high-frequency direct-current pulse current, and the pressure rod continues to keep to the compact heap, the top
The pressure that sheet metal, the lower metal plates apply, and the power supply by the pressure rod and the cavity plate to right
It is connected region and applies DC current, make the compact heap and the upper metal plate local fusing to form common molten pool；
The power supply stops applying DC current, and the common molten pool and the lower metal plates pass through on boundary in natural cooling process
Intermetallic compound thin layer is formed at face and completes metallurgical connection；Finally make the upper metal plate and the lower metal plate
Material forms " metallurgy-is mechanical " composite joint connector；
(4) separation phase:
The power supply stops being powered, and the subsequent pressure rod moves up, and returns to the initial position of step (1), recycles for next connection
It is ready；The upper metal plate, the lower metal plates after connection are toasted, so that the macromolecule knot
Structure glue is cured.
6. a kind of sheet metal according to claim 5 stings weldering composite connecting method, which is characterized in that the baking temperature
It is 150 degrees Celsius, baking time is half an hour.
7. a kind of sheet metal according to claim 5 stings weldering composite connecting method, which is characterized in that
In step (2), the peak value of the high-frequency direct-current pulse current is 0.5~4kA, and frequency range is 50~5000Hz；It is described
The loading velocity of pressure rod is 1~500mm/s；The pressure that the pressure rod applies is 10kN~30kN；
In step (3), the DC current is 2~20kA, and the pressure that the pressure rod applies is 10kN~30kN.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5527457A (en) * | 1978-08-17 | 1980-02-27 | Mitsubishi Electric Corp | Riveting method |
| CN2683274Y (en) * | 2004-03-02 | 2005-03-09 | 广东工业大学 | Metal plate hydraulic-forming die apparatus |
| CN102615508A (en) * | 2012-03-26 | 2012-08-01 | 郑州大学 | Metal plate rotating friction riveting method |
| CN103350276A (en) * | 2013-07-29 | 2013-10-16 | 天津大学 | Spot welding method and application thereof in aluminum alloy and steel |
| CN103600017B (en) * | 2013-11-25 | 2015-09-02 | 吉林大学 | Between ultra-high strength steel plate or with the self-piercing riveting device of aluminium alloy plate |
| CN104399859B (en) * | 2014-11-25 | 2016-07-06 | 眉山南车紧固件科技有限公司 | Thin plate self-locking is solidly connected method and system |
| CN105598566B (en) * | 2015-07-31 | 2018-04-13 | 伊诺瓦科技有限公司 | Plate connection method and body of a motor car or chassis |
| CN105478982A (en) * | 2015-12-03 | 2016-04-13 | 天津大学 | Resistance plug welding method of aluminum alloy-high-strength steel |
| CN105689624A (en) * | 2016-02-02 | 2016-06-22 | 天津大学 | Electroplastic friction spin-riveting device and method for semi-hollow rivet |
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