CN208304134U - A kind of dissimilar material joining device based on pre-manufactured hole - Google Patents
A kind of dissimilar material joining device based on pre-manufactured hole Download PDFInfo
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- CN208304134U CN208304134U CN201820454722.8U CN201820454722U CN208304134U CN 208304134 U CN208304134 U CN 208304134U CN 201820454722 U CN201820454722 U CN 201820454722U CN 208304134 U CN208304134 U CN 208304134U
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Abstract
A kind of dissimilar material joining device based on pre-manufactured hole, belongs to technical field of dissimilar material connection.Including top electrode, lower electrode, power supply, electric conductor, upper sample, lower sample, auxiliary sample and pre-manufactured hole etc..Top electrode, lower electrode are controlled to a power supply by electric conductor, and upper sample assists sample between upper sample and top electrode, there is pre-manufactured hole in upper sample position to be welded between lower sample and top electrode.The advantage is that solving between different materials, physics and chemical characteristic difference are big, and chemical reaction easily occurs and generates brittlement phase, causes the problem of bonding strength deficiency, easy to operate, low in cost.
Description
Technical field
The utility model belongs to technical field of dissimilar material connection, in particular to a kind of dissimilar material based on pre-manufactured hole connects
Connection device.More particularly to a kind of attachment device of steel and aluminium alloy based on pre-manufactured hole, it is suitable for connection conventional welding devices not
The dissimilar metal easily directly welded.
Background technique
Resistance spot welding is a kind of important material joining methods, is widely used in automobile and other industries.Its welding process is
It realizes under pressure, by external force welded piece must be in close contact when welding, welding current passes through workpiece release
Resistance heat realizes welding.
The device and method that traditional resistor spot welding generallys use are that upper sample and lower sample are placed in resistance spot welding to set
Between standby top electrode and lower electrode, wherein top electrode passes through electric conductor with lower electrode respectively and is connected with power supply.By powering on
Apply pressure between pole and lower electrode, upper sample and lower sample are clamped, then by electric power outputting current, electric current is by upper
Electrode, upper sample, lower sample, lower electrode.According to Joule's law, heat is generated between upper sample and lower sample,
Nugget is ultimately formed, so that forming metallurgical bonding between upper sample and lower sample, achievees the purpose that connection.
The above method is widely used in the connection of same material, especially steel material.In recent years, with light weight
Change the application of material, the connection requirement of dissimilar material increasingly increases, and traditional resistance spot welding method does not adapt to dissimilar material company
The demand connect.Main cause is: physics and chemical characteristic are widely different between different materials, and easily send out between different materials
Biochemical reaction generates brittlement phase, causes bonding strength insufficient.For example, just being encountered very big in the resistance spot welding of steel and aluminium
Problem is mainly manifested in: solid solubility between steel and aluminium alloy is lower, physical property differs greatly.The fusing point of steel compares aluminium alloy
Fusing point it is high, in the welding process, when aluminium alloy is completely melt as liquid, steel is still in solid-state.Aluminium alloy and steel are in spot welding
When brittle intermetallic compound can be generated at linkage interface, directly affect the service performance of connector.
Summary of the invention
The purpose of this utility model is to provide a kind of dissimilar material joining device based on pre-manufactured hole, solves traditional dress
It sets low in the big storeroom weld strength of physics and chemical property difference, it is difficult to the problem of realizing effectively connection.
A kind of dissimilar material joining device based on pre-manufactured hole, including top electrode 1, lower electrode 2, power supply 3, electric conductor 4, on
Layer sample 5, lower sample 6, auxiliary sample 7 and pre-manufactured hole 9.Top electrode 1 and lower electrode 2 are connected by electric conductor 4 with power supply 3
It connects, lower sample 6 is between lower electrode 2 and top electrode 1, and upper sample 5 is between lower sample 6 and top electrode 1, auxiliary
Sample 7 is between upper sample 5 and top electrode 1, and there is pre-manufactured hole 9 in the position to be welded of upper sample 5, and auxiliary sample 7 and lower layer try
There is nugget 8 between sample 6.
Top electrode 1 and lower 2 shape of electrode are taper or spherical shape.
Upper sample 5, lower sample 6 and auxiliary sample 7 are conductive material.
Auxiliary sample 7 is round sheet plate.
Pre-manufactured hole 9 and top electrode 1 and lower electrode 2 are coaxial, and the diameter of pre-manufactured hole 9 is not less than both top electrode 1 and lower electrode 2
Minimum value in diameter.
Sample 7 and lower sample 6 is assisted to carry out resistance spot welding, Joint Strength F67, upper sample 5 and lower sample 6 into
Row resistance spot welding, solder joint strength of joint are F56, meet F67>F56。
The application method of above-mentioned apparatus, the specific steps are as follows:
1, pre-manufactured hole 9 is processed in the position to be welded of upper sample 5；
2, top electrode 1, lower electrode 2 are in the open state, are sequentially placed into lower sample 6 between lower electrode 2 and top electrode 1
With upper sample 5, wherein pre-manufactured hole 9 and top electrode 1, lower electrode 2 are coaxial.
3, it is connection lower sample 6 and upper sample 5, auxiliary sample 7 is placed on upper sample 5.
4, one in mobile top electrode 1 or lower electrode 2 or all, make top electrode 1 with assist sample 7 to be in contact, under
Electrode 2 is in contact with lower sample 6, applies pressure N between top electrode 1 and lower electrode 2.
5, under pressure N effect, auxiliary sample 7 is in contact with lower sample 6.
6, welding current I is inputted between top electrode 1 and lower electrode 2 by electric conductor 4 by power supply 3, welding current maintains
Time T assists sample 7 to be welded with lower sample 6 under the function of current, forms nugget 8.
7, stop output electric current, maintain the pressure between top electrode 1 and lower electrode 4.
8, top electrode 1 and lower electrode 2 lift, and return to the position in step 1, complete a welding process
Utility model has the advantages that effectively realize dissimilar material resistance spot welding connection, solve different materials it
Between physics and chemical characteristic difference it is big, easily occur chemical reaction generate brittlement phase, cause the problem of bonding strength deficiency；Device behaviour
Make simple, low in cost.
Detailed description of the invention
Fig. 1 is schematic diagram before the connection of the present apparatus.Wherein, top electrode 1, lower electrode 2, power supply 3, electric conductor 4, upper sample
5, lower sample 6, auxiliary sample 7, pre-manufactured hole 9.
Fig. 2 is schematic diagram after the connection of the present apparatus.Wherein, top electrode 1, lower electrode 2, power supply 3, electric conductor 4, upper sample
5, lower sample 6, auxiliary sample 7, nugget 8.
Fig. 3 is the tapered electrode schematic diagram of the present apparatus.Wherein, top electrode 1.
Fig. 4 is the ball electrode schematic diagram of the present apparatus.Wherein, top electrode 1.
Fig. 5 is the electrode schematic diagram that the present apparatus has flanging function.Wherein, top electrode 1.
Specific embodiment
Embodiment 1
A kind of dissimilar material joining device based on pre-manufactured hole, including top electrode 1, lower electrode 2, power supply 3, electric conductor 4, on
Layer sample 5, lower sample 6, auxiliary sample 7 and pre-manufactured hole 9.Top electrode 1 and lower electrode 2 are connected by electric conductor 4 with power supply 3
It connects, lower sample 6 is between lower electrode 2 and top electrode 1, and upper sample 5 is between lower sample 6 and top electrode 1, auxiliary
Sample 7 is between upper sample 5 and top electrode 1, and there is pre-manufactured hole 9 in the position to be welded of upper sample 5, and auxiliary sample 7 and lower layer try
There is nugget 8 between sample 6.
Top electrode 1 and lower 2 shape of electrode are taper or spherical shape.
Upper sample 5, lower sample 6 and auxiliary sample 7 are conductive material.
Auxiliary sample 7 is round sheet plate.
Pre-manufactured hole 9 and top electrode 1 and lower electrode 2 are coaxial, and the diameter of pre-manufactured hole 9 is not less than both top electrode 1 and lower electrode 2
Minimum value in diameter.
Sample 7 and lower sample 6 is assisted to carry out resistance spot welding, Joint Strength F67, upper sample 5 and lower sample 6 into
Row resistance spot welding, solder joint strength of joint are F56, meet F67>F56。
In the present embodiment, upper sample 5 is the 5 line aluminium alloy materials of thickness 1mm；Lower sample 6 is with a thickness of 1mm's
400Mpa low-alloy high-strength Steel material, 6 surface of lower sample are zinc-plated；Assist the material of sample 7 identical as lower sample 6, auxiliary
Sample 7 is the cylindrical body of diameter 16mm, thickness 1mm；Top electrode 1, lower electrode 2 are chromium-zirconium-copper material, electrode diameter 5.5mm.
The lower sample 6 of low-alloy high-strength Steel material and the auxiliary sample 7 of low-alloy high-strength Steel material are conductive material.
The resistance spot welding of the lower sample 6 of the auxiliary sample 7 and low-alloy high-strength Steel material of low-alloy high-strength Steel material
It can be better than the resistance spot welding performance between the upper sample 5 of 5 line aluminium alloy materials and the lower sample 6 of low-alloy high-strength Steel material.
That is the auxiliary sample 7 of low-alloy high-strength Steel material and the lower sample 6 of low-alloy high-strength Steel material carries out resistance spot welding, acquisition
Joint Strength is F67, the upper sample 5 of 5 line aluminium alloy materials and the lower sample 6 of low-alloy high-strength Steel material carry out point of resistance
Weldering, the solder joint strength of joint of acquisition are F56, meet F67>F56。
In the present embodiment, auxiliary sample 7 can be there are two types of different forms: a kind of situation, auxiliary sample 7 are circular piece
Shape material；Another situation assists the prefabricated protrusion to 5 direction of upper sample of sample 7.
The application method of the present embodiment described device, the specific steps are as follows:
1, pre-manufactured hole 9, aperture 6.0mm are processed in the position to be welded of upper sample 5, upper/lower electrode diameter is 5.5mm.
2, top electrode 1, lower electrode 2 are in the open state, are sequentially placed into low-alloy height between lower electrode 2 and top electrode 1
The upper sample 5 of the line aluminium alloy material of lower sample 6 and 5 of strong Steel material.
3, it is the upper sample 5 of the line aluminium alloy material of lower sample 6 and 5 of connection low-alloy high-strength Steel material, is aluminium 5
The auxiliary sample 7 of low-alloy high-strength Steel material is placed on the upper sample 5 of alloy material, wherein pre-manufactured hole 9 and top electrode 1,
Lower electrode 2 is coaxial.
4, one or whole in top electrode 1 or lower electrode 2 are moved, top electrode 1 and low-alloy high-strength Steel material are made
Sample 7 is in contact auxiliary, lower electrode 2 is in contact with the lower sample 6 of low-alloy high-strength Steel material, in top electrode 1 and lower electrode 2
Between apply pressure N, as shown in Figure 1.
5, under pressure N effect, the auxiliary sample 7 of low-alloy high-strength Steel material and the lower layer of low-alloy high-strength Steel material are tried
Sample 6 is in contact.
6, welding current I is inputted between top electrode 1 and lower electrode 2 by electric conductor 4 by power supply 3, welding current maintains
Time T, under the function of current, low-alloy high-strength Steel material auxiliary sample 7 and low-alloy high-strength Steel material lower sample 6 into
Row welding, forms nugget 8, as shown in Figure 2.
7, stop output electric current, maintain the pressure between top electrode 1 and lower electrode 4.
8, top electrode 1 and lower electrode 2 lift, and return to the position in step 1, complete a welding process.
In the present embodiment, welding current only is characterized with I, but being not intended to limit I is steady state value.That is the form packet of welding current I
Include but be not limited to following types: DC current, alternating current, pulse current, the electric current gradually increased, the electric current being gradually reduced,
The electric current etc. of different wave.
In the present embodiment, only with the pressure in N characterization connection procedure, variation can be in the different phase N value of connection.
In the present embodiment, the selection of technological parameter and upper sample 5, lower sample 6 and the material and thickness that assist sample 7
Degree is closely related.It is as shown in the table for the technological parameter of material described in the present embodiment and specification:
| Pressure (kN) | Welding current (kI) | Welding current holds time (ms) |
| 1.5-5 | 8-16 | 100-500 |
The present embodiment obtain 5 line aluminium alloy materials upper sample 5 and low-alloy high-strength Steel material lower sample 6 it
Between the shear strength of jointing be more than 4kN.
In the present embodiment, the form of electrode can be tapered electrode, as shown in Figure 3；It can be ball electrode, such as Fig. 4 institute
Show；It can be electrode as shown in Figure 5 with flanging function.The advantages of device as shown in Figure 5 is to prevent auxiliary sample 7 from welding
It deforms and upwarps in termination process.
Claims (5)
1. a kind of dissimilar material joining device based on pre-manufactured hole, which is characterized in that including top electrode (1), lower electrode (2), electricity
Source (3), electric conductor (4), upper sample (5), lower sample (6), auxiliary sample (7) and pre-manufactured hole (9)；Top electrode (1) and under
Electrode (2) is connected by electric conductor (4) with power supply (3), lower sample (6) between lower electrode (2) and top electrode (1),
Upper sample (5) is located between lower sample (6) and top electrode (1), and auxiliary sample (7) is located at upper sample (5) and top electrode
(1) between, upper sample (5) position to be welded has pre-manufactured hole (9), assists having nugget (8) between sample (7) and lower sample (6).
2. the apparatus according to claim 1, which is characterized in that the top electrode (1) and lower electrode (2) shape are taper
Or it is spherical.
3. the apparatus according to claim 1, which is characterized in that upper sample (5), lower sample (6) and the auxiliary
Sample (7) is conductive material.
4. the apparatus according to claim 1, which is characterized in that the auxiliary sample (7) is round sheet plate.
5. the apparatus according to claim 1, which is characterized in that the pre-manufactured hole (9) and top electrode (1) and lower electrode
(2) coaxially, the diameter of pre-manufactured hole (9) is not less than the minimum value in both top electrode (1) and lower electrodes (2) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454722.8U CN208304134U (en) | 2018-04-02 | 2018-04-02 | A kind of dissimilar material joining device based on pre-manufactured hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454722.8U CN208304134U (en) | 2018-04-02 | 2018-04-02 | A kind of dissimilar material joining device based on pre-manufactured hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208304134U true CN208304134U (en) | 2019-01-01 |
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|---|---|---|---|
| CN201820454722.8U Active CN208304134U (en) | 2018-04-02 | 2018-04-02 | A kind of dissimilar material joining device based on pre-manufactured hole |
Country Status (1)
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| CN (1) | CN208304134U (en) |
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2018
- 2018-04-02 CN CN201820454722.8U patent/CN208304134U/en active Active
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