CN109396627A - Dissimilar material joining device and connection method - Google Patents
Dissimilar material joining device and connection method Download PDFInfo
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- CN109396627A CN109396627A CN201811123262.1A CN201811123262A CN109396627A CN 109396627 A CN109396627 A CN 109396627A CN 201811123262 A CN201811123262 A CN 201811123262A CN 109396627 A CN109396627 A CN 109396627A
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Classifications
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- 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
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- 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
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded
- B23K11/20—Resistance welding; Severing by resistance heating taking account of the properties of the material to be welded of different metals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses a kind of dissimilar material joining device and connection methods, the attachment device includes power supply, top electrode, lower electrode and conductive auxiliary member, the top electrode connects the first output end of the power supply, and the lower electrode connects the second output terminal of the power supply；The conduction auxiliary member includes the first cylinder and the second cylinder, one bottom surface of first cylinder connects a bottom surface of second cylinder, the floor projection of second cylinder is fallen into the floor projection of first cylinder, the fusing point of second cylinder is higher than the fusing point of the first sample, the fusing point of first sample is lower than the fusing point of the second sample, the weld strength of second cylinder and second sample is higher than the weld strength of first sample and second sample, and the height of second cylinder is greater than the thickness of first sample.Dissimilar material joining device provided by the invention and connection method solve the problems, such as that bonding strength is insufficient between different materials.
Description
Technical field
The present invention relates to technical field of dissimilar material connection, and in particular to a kind of dissimilar material joining device and connection side
Method.
Background technique
Traditional resistance spot welding generally use by upper sample and lower sample be placed in resistance spot welding device top electrode and
Between lower electrode, wherein top electrode is connected with power supply respectively with lower electrode, by applying pressure between the upper and lower electrodes,
Upper sample and lower sample are clamped, the electric current that power supply provides passes through top electrode, upper sample, lower sample, lower electrode.Root
According to Joule's law, generate heat between upper sample and lower sample and form nugget so that upper sample and lower sample it
Between form metallurgical bonding, to achieve the purpose that connection.
Above-mentioned resistance spot welding method is widely used in the connection of same material, especially steel material.In recent years, with
The application of lightweighting materials, the connection requirement of dissimilar material increasingly increase, traditional resistance spot welding method does not adapt to xenogenesis
The demand of material connection.Main reason is that: the physical characteristic and chemical characteristic between different materials are widely different, also,
Chemical reaction easily occurs between different materials and generates brittlement phase, causes bonding strength insufficient.For example, in the resistance of steel and aluminium alloy
In spot welding, with regard to encountering very big problem: solid solubility between steel and aluminium alloy is lower, physical property differs greatly, the fusing point of steel
It is higher than the fusing point of aluminium alloy.In the welding process, when aluminium alloy is completely melt as liquid, steel is still in solid-state.Aluminium alloy and
Steel will generate brittle intermetallic compound at linkage interface, directly affect the service performance of connector in spot welding.
Summary of the invention
To be solved by this invention asked using existing resistance spot welding device connecting dissimilar material bonding strength is insufficient
Topic.
The present invention is achieved through the following technical solutions:
A kind of dissimilar material joining device, including power supply, top electrode, lower electrode and conductive auxiliary member, the top electrode
The first output end of the power supply is connected, the lower electrode connects the second output terminal of the power supply；
The conduction auxiliary member includes the first cylinder and the second cylinder, the bottom surface connection described the of first cylinder
One bottom surface of two cylinders, the floor projection of second cylinder are fallen into the floor projection of first cylinder, and described second
The fusing point of cylinder is higher than the fusing point of the first sample, and the fusing point of first sample is lower than the fusing point of the second sample, second column
The weld strength of body and second sample is higher than the weld strength of first sample and second sample, second column
The height of body is greater than the thickness of first sample.
Optionally, the cross section of second cylinder is non-circular.
Optionally, the cross section of second cylinder is ellipse.
Optionally, the cross section of second cylinder is the polygon with rounding corner structure.
Optionally, the cross section of second cylinder is irregular shape, and the irregular shape includes rectangle, the first bow
Shape and the second arch；
The first bowed string is the first side of the rectangle, and the second bowed string is the second of the rectangle
Side, described first is parallel while with described second.
Optionally, the described first bowed arc length and the second bowed arc length are equal.
Optionally, the central axes of first cylinder and the central axes of second cylinder are overlapped.
Optionally, first cylinder is cylindrical body.
Optionally, first sample is upper sample, and second sample is lower sample.
Based on same inventive concept, the present invention also provides a kind of dissimilar material joining methods, are based on above-mentioned dissimilar material
Attachment device, comprising:
Stacked gradually between the top electrode and the lower electrode place the conductive auxiliary member, first sample with
And second sample, and make another bottom surface of second cylinder and first sample contacts；
It controls the top electrode and while the lower electrode is mutually drawn close, controls the power supply and the first electric current is provided, with
Second cylinder is set to pass through first sample and second sample contacts；
It controls the top electrode and while the lower electrode is mutually drawn close, controls the power supply and the second electric current is provided, with
Melt the contact site between second cylinder and second sample；
Control the power supply to stop working, and maintain to draw close state between the top electrode and the lower electrode, with
Nugget is formed between second cylinder and second sample；
It controls the top electrode and the lower electrode mutually deviates from, take out first sample and second sample is formed
Connector.
Compared with prior art, the present invention having the following advantages and benefits:
Dissimilar material joining device provided by the invention and connection method, setting includes the between the upper and lower electrodes
The conductive auxiliary member of one cylinder and the second cylinder, and the fusing point of second cylinder be higher than the first sample fusing point, described first
The fusing point of sample is lower than the fusing point of the second sample, and the weld strength of second cylinder and second sample is higher than described first
The weld strength of sample and second sample, the height of second cylinder are greater than the thickness of first sample, thus
When connecting first sample and second sample, first sample melts or softens prior to second cylinder, described
Second cylinder may pass through first sample, form nugget between second cylinder and second sample, so as to
The resistance spot welding connection for effectively realizing dissimilar material solves physics and chemical characteristic difference Yi Fasheng greatly between different materials
Chemical reaction generates brittlement phase, causes the problem of bonding strength deficiency.Further, described due to the presence of first cylinder
After first sample and second sample form connection, power of first sample by vertical direction can prevent described first
Sample is pulled with second cylinder.
Also, in a specific embodiment of the invention, by setting non-circular for the cross section of second cylinder
Shape can form non-circular hole when second cylinder passes through first sample, so that first sample and described
It is not susceptible to rotate between second cylinder, has the function that enhance torque, the anti-torsion performance of solder joint connector can be obviously improved.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the dissimilar material joining device of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the conductive auxiliary member of the embodiment of the present invention；
Fig. 3 is the cross-sectional view of second cylinder of an embodiment of the present invention；
Fig. 4 is the cross-sectional view of the second cylinder of another embodiment of the invention；
Fig. 5 is the cross-sectional view of the second cylinder of another embodiment of the present invention.
Label and corresponding parts title in attached drawing:
1- power supply, 2- top electrode, electrode under 3-, 4- conduction auxiliary member, the first conducting wire of 5-, the second conducting wire of 6-, 7- first are tried
Sample, the second sample of 8-, 9- nugget, the first cylinder of 41-, the second cylinder of 42-.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
The present embodiment provides a kind of dissimilar material joining device, Fig. 1 is the structural representation of the dissimilar material joining device
Figure, the dissimilar material joining device include power supply 1, top electrode 2, lower electrode 3 and conductive auxiliary member 4.
Specifically, the top electrode 2 connects the first output end of the power supply 1, and the lower electrode 3 connects the power supply 1
Second output terminal.The power supply 1 is used to power to the top electrode 2 and the lower electrode 3, in the top electrode 2 and described
Current loop is formed between lower electrode 3.Further, the power supply 1 can be current source.The top electrode 2 passes through the first conducting wire 5
The first output end of the power supply 1 is connected, the lower electrode 3 connects the second output terminal of the power supply 1 by the second conducting wire 6.
Fig. 2 is the structural schematic diagram of the conductive auxiliary member 4, and the conduction auxiliary member 4 includes the first cylinder 41 and second
One bottom surface of cylinder 42, first cylinder 41 connects a bottom surface of second cylinder 42, second cylinder 42
Floor projection is fallen into the floor projection of first cylinder 41.It continues to refer to figure 1, the conduction auxiliary member 4 is for being arranged
Between the top electrode 2 and the lower electrode 3, for assisting the first sample 7 of connection and the second sample 8,7 He of the first sample
Second sample 8 is the sample with different melting points for needing to connect, wherein the fusing point of second cylinder 42 is higher than described first
The fusing point of sample 7, the fusing point of first sample 7 are lower than the fusing point of second sample 8；Second cylinder 42 and described the
The weld strength of two samples 8 is higher than the weld strength of first sample 7 and second sample 8, and second cylinder 42
Height be greater than first sample 7 thickness.
Further, the cross section of second cylinder 42 can be non-circular, i.e., described second cylinder 42 is non-rotary body.
For example, the cross section of second cylinder 42 can be ellipse, as shown in Figure 3；The cross section of second cylinder 42 can be with
For the polygon with rounding corner structure, there is the triangle of rounding corner structure as shown in Figure 4；Second cylinder 42 it is transversal
Face can also be irregular shape, as shown in figure 5, the irregular shape includes rectangle, the first arch and the second arch.Institute
State the first bowed string be the rectangle the first side, the second bowed string be the rectangle the second side, described first
It is parallel while with described second.Also, the first bowed arc length and the second bowed arc length may be arranged as phase
Deng.Fig. 3 is set to figure shown in fig. 5, due to second cylinder 42 by the cross-sectional shape of second cylinder 42
Cross section avoids stress concentration without wedge angle, can promote the joint performance that welding is formed.It should be noted that second column
The cross-sectional shape of body 42 is not limited to Fig. 3 to figure shown in fig. 5, as long as second cylinder 42 is non-rotary body.
It should be noted that first cylinder 41 and second cylinder 42 can be the integrated molding knot of same material
Structure.First cylinder 41 can be cylindrical body, the central axes of the central axes of first cylinder 41 and second cylinder 42
It is overlapped.As a specific embodiment, the conduction auxiliary member 4 is carbon steel, and it is aluminium that first sample 7, which is with a thickness of the 5 of 1mm,
Alloy, second sample 8 be thickness 1mm hot forming steel 22MnB5, first cylinder 41 be highly be 1mm, diameter is
The cylindrical body of 10mm, second cylinder 42 be height be 1.3mm, the cylinder that cross-sectional shape is as shown in Figure 5.
In the present embodiment, first sample 7 is upper sample, and second sample 8 is lower sample.It is carrying out a little
When weldering connection, between the top electrode 2 and first sample 7, second sample 8 is located at the conduction auxiliary member 4
Between first sample 7 and the lower electrode 3.Certainly, in other embodiments, can also first sample 7 be lower layer
Sample, second sample 8 is upper sample, and when carrying out spot welding connection, the conduction auxiliary member 4 is located at the lower electrode 3
Between first sample 7, second sample 8 is between first sample 7 and the top electrode 2.
Based on same inventive concept, the embodiment of the present invention also provides a kind of dissimilar material joining method, for using
It states dissimilar material joining device to be attached dissimilar material, the dissimilar material joining method includes:
It is stacked gradually between the top electrode 2 and the lower electrode 3 and places the conductive auxiliary member 4, first examination
Sample 7 and second sample 8, and contact another bottom surface of second cylinder 42 with first sample 7；
It controls the top electrode 2 and while the lower electrode 3 is mutually drawn close, controls the power supply 1 and first electric current is provided,
So that second cylinder 42 passes through first sample 7 and contacts with second sample 8；
It controls the top electrode 2 and while the lower electrode 3 is mutually drawn close, controls the power supply 1 and second electric current is provided,
So that the contact site between second cylinder 42 and second sample 8 melts；
It controls the power supply 1 to stop working, and maintains to draw close state between the top electrode 2 and the lower electrode 3, with
Nugget 9 is formed between second cylinder 42 and second sample 8；
It controls the top electrode 2 and the lower electrode 3 mutually deviates from, take out first sample 7 and second sample 8
The connector of formation.
Specifically, still by taking first sample 7 is upper sample, second sample 8 is lower sample as an example, to described
When first sample 7 and second sample 8 are attached, using top electrode 2 described in pneumatic shuttle or step motor control and/
Or the lower electrode 3, keep the top electrode 2 and the lower electrode 3 in the open state, in the top electrode 2 and the lower electricity
Second sample 8, first sample 7 and the conductive auxiliary member 4 are sequentially placed between pole 3 from top to bottom, and makes institute
Another bottom surface for stating the second cylinder 42 is contacted with first sample 7.
After placing the conductive auxiliary member 4, first sample 7 and second sample 8, using pneumatic shuttle
Or top electrode 2 described in step motor control and/or the lower electrode 3, it is applied between the top electrode 2 and the lower electrode 3
Plus-pressure F draws close the top electrode 2 and the lower electrode 3 mutually.Also, controlling the top electrode 2 and the lower electrode
3 while mutually draw close, and controls the power supply 1 and provides the first electric current I1, the first electric current I1's holds time as T1.Institute
Under the action of stating the first electric current I1, softening or fusing occur for first sample 7, and second cylinder 42 is in the pressure F
Under the action of pass through first sample 7 be in contact with second sample 8.
After second cylinder 42 is contacted with second sample 8, the top electrode 2 and the lower electrode 3 are controlled
Continuation is mutually drawn close, while being controlled the power supply 1 and being provided the holding time as T2 of the second electric current I2, the second electric current I2,
Contact site fusing under the action of the second electric current I2, between second cylinder 42 and second sample 8.
After contact site fusing between second cylinder 42 and second sample 8, controls the power supply 1 and stop
Only export electric current, maintain the pressure F between the top electrode 2 and the lower electrode 3, that is, maintain the top electrode 2 and it is described under
State is drawn close between electrode 3, after the contact site between second cylinder 42 and second sample 8 is cooling, forms institute
State nugget 9.
Formed after the soldering 9, using top electrode 2 described in pneumatic shuttle or step motor control and/or it is described under
Electrode 3 deviates from the top electrode 2 and the lower electrode 3 mutually, that is, controls the top electrode 2 and the lower electrode 3 is in and beats
Open state takes out the connector that first sample 7 and second sample 8 are formed, and completes to first sample 7 and described
The welding of second sample 8.
It should be noted that the form of the first electric current I1 and the second electric current I2 include but is not limited to following classes
Type: DC current, alternating current, pulse current, the electric current gradually increased, the electric current being gradually reduced, electric current of different wave etc..
Also, the pressure F only characterizes the pressure in connection procedure, and the pressure value of pressure F described in the different phase of connection can be
Variation.The first electric current I1 and its T1 that holds time, the second electric current I2 and its T2 and pressure F that holds time
Selection and the close phase of factors such as material, size of the conduction auxiliary member 4, first sample 7 and second sample 8
It closes, the present embodiment is not construed as limiting this.It is as shown in the table for the technological parameter of material described in the present embodiment and specification:
Dissimilar material joining device provided in this embodiment and connection method, since the fusing point of first sample 7 is lower than
The fusing point of second sample 8, the fusing point of second cylinder 42 are higher than the fusing point of first sample 7, while described second
The solder joint strength of joint of cylinder 42 and second sample 8 is higher than the solder joint connector of first sample 7 and second sample 8
Intensity, thus when connecting first sample 7 with second sample 8, first sample 7 is prior to second cylinder 42
Fusing or softening, second cylinder 42 may pass through first sample 7, in second cylinder 42 and second sample 8
Between form nugget, so as to effectively realize the resistance spot welding connection of dissimilar material, solve between different materials physics and
Chemical characteristic difference is big and chemical reaction easily occurs and generates brittlement phase, causes the problem of bonding strength deficiency.Also, due to described
The presence of first cylinder 41, after first sample 7 and second sample 8 form connection, first sample 7 is by vertical
When the power in direction, it can prevent first sample 7 from pulling with second cylinder 42.
Further, it by setting non-circular for the cross section of second cylinder 42, can be worn in second cylinder 42
Non-circular hole is formed when crossing first sample 7, so that being not easy to send out between first sample 7 and second cylinder 42
Raw rotation has the function that enhance torque, can be obviously improved the anti-torsion performance of solder joint connector.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of dissimilar material joining device, which is characterized in that including power supply (1), top electrode (2), lower electrode (3) and conduction
Auxiliary member (4), the top electrode (2) connect the first output end of the power supply (1), and the lower electrode (3) connects the power supply
(1) second output terminal；
The conduction auxiliary member (4) includes the first cylinder (41) and the second cylinder (42), a bottom of first cylinder (41)
Face connects a bottom surface of second cylinder (42), and the floor projection of second cylinder (42) falls into first cylinder
(41) in floor projection, the fusing point of second cylinder (42) is higher than the fusing point of the first sample (7), first sample (7)
Fusing point be lower than the fusing point of the second sample (8), the weld strength of second cylinder (42) and second sample (8) is higher than institute
The weld strength of the first sample (7) Yu second sample (8) is stated, the height of second cylinder (42) is greater than first examination
The thickness of sample (7).
2. dissimilar material joining device according to claim 1, which is characterized in that the cross section of second cylinder (42)
It is non-circular.
3. dissimilar material joining device according to claim 2, which is characterized in that the cross section of second cylinder (42)
For ellipse.
4. dissimilar material joining device according to claim 2, which is characterized in that the cross section of second cylinder (42)
For the polygon with rounding corner structure.
5. dissimilar material joining device according to claim 2, which is characterized in that the cross section of second cylinder (42)
For irregular shape, the irregular shape includes rectangle, the first arch and the second arch；
The first bowed string is the first side of the rectangle, and the second bowed string is the second side of the rectangle, institute
It is parallel while with described second to state first.
6. dissimilar material joining device according to claim 5, which is characterized in that the first bowed arc length and described
Second bowed arc length is equal.
7. dissimilar material joining device according to claim 1, which is characterized in that the central axes of first cylinder (41)
It is overlapped with the central axes of second cylinder (42).
8. dissimilar material joining device according to claim 1, which is characterized in that first cylinder (41) is cylinder
Body.
9. dissimilar material joining device according to claim 1, which is characterized in that first sample (7) is upper layer examination
Sample, second sample (8) are lower sample.
10. a kind of dissimilar material joining method is based on the described in any item dissimilar material joining devices of claim 1 to 9, special
Sign is, comprising:
It is stacked gradually between the top electrode (2) and the lower electrode (3) and places the conductive auxiliary member (4), described first
Sample (7) and second sample (8), and make another bottom surface of second cylinder (42) and first sample (7)
Contact；
It controls the top electrode (2) and while the lower electrode (3) is mutually drawn close, controls the power supply (1) and the first electricity is provided
Stream, so that second cylinder (42) passes through first sample (7) and contacts with second sample (8)；
It controls the top electrode (2) and while the lower electrode (3) is mutually drawn close, controls the power supply (1) and the second electricity is provided
Stream, so that the contact site between second cylinder (42) and second sample (8) melts；
It controls the power supply (1) to stop working, and maintains to draw close state between the top electrode (2) and the lower electrode (3),
To form nugget (9) between second cylinder (42) and second sample (8)；
It controls the top electrode (2) and the lower electrode (3) mutually deviates from, take out first sample (7) and second examination
The connector that sample (8) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811123262.1A CN109396627A (en) | 2018-09-26 | 2018-09-26 | Dissimilar material joining device and connection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811123262.1A CN109396627A (en) | 2018-09-26 | 2018-09-26 | Dissimilar material joining device and connection method |
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ID=65466224
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| CN201811123262.1A Pending CN109396627A (en) | 2018-09-26 | 2018-09-26 | Dissimilar material joining device and connection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111250992A (en) * | 2020-02-25 | 2020-06-09 | 吉利汽车研究院（宁波）有限公司 | Conductive auxiliary member, dissimilar material joining apparatus, and dissimilar material joining method |
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Application publication date: 20190301 |