KR20160076940A - Welding method for aluminium sheet and carbon fiber reinforced plastics sheet - Google Patents

Welding method for aluminium sheet and carbon fiber reinforced plastics sheet Download PDF

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Publication number
KR20160076940A
KR20160076940A KR1020140187640A KR20140187640A KR20160076940A KR 20160076940 A KR20160076940 A KR 20160076940A KR 1020140187640 A KR1020140187640 A KR 1020140187640A KR 20140187640 A KR20140187640 A KR 20140187640A KR 20160076940 A KR20160076940 A KR 20160076940A
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South Korea
Prior art keywords
aluminum plate
plate
cfrp composite
joining
composite plate
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KR1020140187640A
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Korean (ko)
Inventor
송문종
이문용
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주식회사 성우하이텍
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Priority to KR1020140187640A priority Critical patent/KR20160076940A/en
Publication of KR20160076940A publication Critical patent/KR20160076940A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B32B37/065—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method resulting in the laminate being partially bonded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/28—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer impregnated with or embedded in a plastic substance

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Disclosed is a method for joining an aluminum sheet and a carbon fiber reinforced plastics (CFRP) composite sheet, capable of joining the aluminum sheet and the CFRP composite sheet by using the difference of the boiling point between the aluminum sheet and the CFRP composite sheet. The method for joining the aluminum sheet and the CFRP composite sheet according to one embodiment of the present invention includes: a step of loading the CFRP composite sheet and the aluminum sheet on a jig, in a state that the CFRP composite sheet and the aluminum sheet are mutually overlapped; a step of compressing an upper surface of the aluminum sheet against the CFRP composite sheet with a certain pressure on the top of the jig by driving a pressurizing cylinder; and a step of heating and joining, wherein the step of heating and joining includes heating the CFRP composite sheet up to a melting point of the CFRP by using a heat transfer while heating the aluminum sheet with a laser beam serving as a heat source, in the compressing state, busting a high pressure bubble generated in a fusion resin at the joining interface of the sheets, and making the joining surface of aluminum sheet to be rough such that the fusion resin of the CFRP composite sheet can be penetrated into the joining surface and solidified at the joining surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining an aluminum plate to a carbon fiber-

The present invention relates to a method of joining an aluminum plate to a carbon fiber-reinforced plastic composite plate, and more particularly, to a method of joining a steel plate and a CFRP composite plate by a laser heat source only without bonding or fastening parts, To a method of joining the same.

Generally, in the industrial field, laser welding using a laser beam output from a laser oscillator or electric resistance welding using a spot welder is mainly applied to mutually overlap and bond two metal plates.

1 is a view showing a laser welding process by a general laser welding system.

1, a general laser welding system for welding a steel sheet material using a laser beam LB is provided with a laser head 5 at the tip of an arm 3 of the robot 1, Is connected to the laser oscillator 7.

The robot 1 is controlled by the robot controller C so that the laser beam LB is irradiated while moving the laser head 5 along the welding pattern of the work 9 to perform welding work.

In recent years, in accordance with the trend of high-strength and light weight of the vehicle body, a case where a composite plate made of a carbon fiber-reinforced plastic (CFRP), as well as a metal plate or a non- lost.

Since CFRP using carbon fiber is excellent in strength, elastic modulus, light weight and stability, it is widely regarded as one of the main materials in the aeronautical and automobile fields requiring high performance. If the economic condition is solved, The production of CFRP is expected to increase dramatically.

Particularly, CFRP in the automobile industry is a tendency to use carbon fiber mainly made of resin such as epoxy or plastic. In other words, CFRP is a high-tech composite material that is made of carbon fiber in a winding shape or a fabric shape and then cured by impregnating the resin into a resin stream, which is a high-strength and highly elastic lightweight material.

In CFRP, resin streams are excellent in hardness, while tensile strength is weak and easily broken, and carbon fibers combine the two because they have high tensile strength but no bending repulsion.

Further, the carbon fiber can be lightened by a weight of 1/4 of that of the steel of the same volume, and the tensile strength is ten times stronger, which is advantageous in securing rigidity, and is also advantageous in moldability.

However, in order to apply the CFRP as described above to a vehicle body, it is necessary to be able to join the steel plate or the aluminum plate material or the like which is difficult to replace it. Due to the physical properties of the two materials, laser welding or spot welding is impossible There is a disadvantage that mechanical bonding is mainly performed using bonding or fastening parts.

Particularly, in order to perform bonding or mechanical bonding according to the conventional bonding method of an aluminum plate and a carbon fiber-reinforced plastic composite plate, dimensions must be taken into consideration from the designing stage so as not to deviate from the designed dimensions, Research and development of methods is an urgent problem.

The matters described in the above background section are intended to enhance understanding of the background of the invention and may include matters not previously known to those having ordinary skill in the art to which the present invention belongs.

The embodiment of the present invention uses a laser beam of a non-focal region as a heat source while using an aluminum plate and a CFRP composite plate in a superposed state without a separate bonding or fastening component, using a boiling point difference between an aluminum plate and a CFRP composite plate To provide a method of joining an aluminum plate to a carbon fiber-reinforced plastic composite plate.

According to one or more embodiments of the present invention, there is provided a method of joining an aluminum plate and a carbon fiber-reinforced plastic composite plate, comprising: a loading step of loading a CFRP composite plate and an aluminum plate together on a jig; A pressing step of pressing the upper surface of the aluminum plate to a predetermined pressure with respect to the CFRP composite plate by driving a pressurizing cylinder at an upper portion of the jig; In the pressing step, the aluminum plate is heated with a laser beam as a heat source, and the CFRP composite plate is heated to a boiling point by heat transfer so that the high-pressure bubble generated in the molten resin blows at the joint interface, And joining the molten resin of the CFRP composite plate to the surface of the joining portion to solidify the joining portion, thereby bonding the aluminum plate to the carbon fiber-reinforced plastic composite sheet.

In the heating and bonding step, a laser beam of a non-focal region is irradiated to the upper surface of the aluminum plate to heat a certain region of the bonding portion of the CFRP composite plate by heat transfer from the heated aluminum plate, So that the surface of the joint is partially penetrated into a predetermined region of the joint of the CFRP composite plate; The high-pressure bubbles generated in the molten resin in a certain region of the joint portion of the CFRP composite plate abruptly expand and burst at the joint interface, so that the joint portion of the aluminum plate, which is in the partially penetrated state, Roughening; Infiltrating the molten resin of the CFRP composite plate onto the roughened surface of the aluminum plate; Removing the heat source and allowing the CFRP composite plate and the aluminum plate to cool through natural cooling so that the molten resin of the CFRP composite plate infiltrated on the roughened surface of the aluminum plate is solidified and bonded .

Further, in the heating and bonding step, the heat input by the heat source may be set within the range of 2 kJ / min to 2.4 kJ / min.

In the heating and bonding step, the laser beam may be heated at a welding speed of 10 mm / sec, an output of 1200 W, and an incident angle of 15 °.

In addition, the laser beam of the non-focal region can be set in a section where the distance from the focal point is 80 mm or more.

The boiling point of the CFRP composite plate may be set at a temperature lower than the melting point of the aluminum plate.

Also, the boiling point of the CFRP composite plate may be set within a temperature range of 240 ° C to 260 ° C.

The embodiment of the present invention is a method of manufacturing a CFRP composite plate by heating the aluminum plate with a laser beam in a non-focal region in a state of pressing the aluminum plate to the CFRP composite plate, and heating the CFRP composite plate to a boiling point by heat transfer, The high-pressure bubbles generated inside the molten resin are blown to roughen the surface of the joining portion of the aluminum plate, and the molten resin of the CFRP composite plate is infiltrated and solidified on the surface of the roughened joint portion, It is easy to realize an automation line, and it is possible to eliminate the joining material such as fastening parts and there is no need to consider the design dimensions.

In addition, the bonding bonding has an advantage that there is no variation in bonding strength depending on the ambient temperature, while maintaining the static temperature of the bonding agent.

In addition, as the laser scanner is utilized, it can be applied without restriction to the product shape or the bonding surface.

1 is a view showing a laser welding process by a general laser welding system.
2 is a process diagram according to a method of joining an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention.
3 is a detailed process diagram of a heating and bonding step according to a method of joining an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention.
4 is a cross-sectional view of a bonded portion of a specimen bonded according to a bonding method of an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a method of joining an aluminum plate and a carbon fiber-reinforced plastic composite plate, and more particularly, to a method of joining an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention. And FIG.

Referring to FIG. 2, in the method of bonding an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention, an aluminum plate 13 and a CFRP composite plate 11 are pressed while being superimposed, The pressurizing step S2 and the heat bonding step S3 are carried out by using the difference in boiling point between the aluminum plate 13 and the CFRP composite plate 11 as a heat source, ).

That is, in the method of joining the aluminum plate and the carbon fiber-reinforced plastic composite plate according to the embodiment of the present invention, the boiling point of the CFRP composite plate 11 is set at a temperature which is set at a temperature much lower than the melting point of the aluminum plate 13 And if the melting point of the ordinary aluminum plate 13 is about 660 ° C, the boiling point of the CFRP composite plate 11 is set within a temperature range of 240 ° C to 260 ° C.

First, in the loading step S1, the CFRP composite plate 11 and the aluminum plate 13 are stacked on the jig 17 in a superimposed manner.

At this time, the aluminum plate 13 is loaded on the jig 17 together with the CFRP composite plate 11 in an overlapped state on the CFRP composite plate 11, and the CFRP composite plate 11 The aluminum plate members 13 overlap each other without any pre-treatment.

In the pressing step S2, the pressurizing cylinder 19 constituting the upper part of the jig 17 is driven forward to move the aluminum plate member (not shown) to the CFRP composite plate 11 13) at a certain pressure.

The pressing cylinder 19 may be constructed of a pneumatic cylinder so as to press the aluminum plate 13 from above through the pad 23 at the tip of the push rod 21. However, It is possible to apply any structure as long as it can provide a pressing force to the aluminum plate material 13 without blocking.

3, the heating and joining step S3 is performed in a state in which the aluminum plate 13 is pressed against the CFRP composite plate 11 at a constant pressure through the pressurizing cylinder 19, The CFRP composite plate 11 is heated to the boiling point by heat transfer of the heated aluminum plate 13 using the laser beam LB irradiated from the laser beam LB irradiated from the laser beam LB, The high pressure bubble B generated in the molten resin R of the composite plate 11 is roughed at the joint interface so that the joint surface F of the aluminum plate 13 is roughened, The molten resin (R) of the CFRP composite plate 11 is infiltrated and solidified, so that bonding is performed.

The heating joining step (S3) will be described in more detail as follows.

That is, the heating and bonding step S3 is divided into a heating step S31, a surface treatment step S32, a resin infiltration step S33, and a cooling step S34.

First, in the heating step S31, the upper aluminum plate 13 is pressed against the CFRP composite plate 11 by the pressurizing cylinder 19 on the jig 17 at a constant pressure, Irradiates a laser beam (LB) of a non-focal region with respect to the upper surface of the CFRP composite plate material (13) and heats the fixed region (Z) of the CFRP composite plate material (11) by heat transfer from the heated aluminum plate The joint surface F of the aluminum plate 13 is subjected to partial penetration (PP) in a predetermined region Z of the joint portion of the CFRP composite plate 11.

The amount of heat input to the aluminum plate 13 and the CFRP composite plate 11 by the laser beam LB serving as a heat source is set within the range of 2 kJ / min to 2.4 kJ / min, and the amount of heat of the laser beam LB The heating conditions were a welding speed of 10 mm / sec, an output of 1200 W, and an incident angle of 15 °.

In addition, the laser beam LB of the non-focal region is set at a distance of 80 mm or more from the focal point, thereby sufficiently securing a focal width capable of being heated once at the fused portion.

At this time, the laser beam LB can heat the aluminum plate 13 using a non-focal period, and the heating temperature can be controlled through controlling the focal distance, welding speed, output, have.

As described above, in the heating step S31, the surface treatment step S32 is a step of heating the predetermined region Z of the joined portion of the CFRP composite plate 11 to a boiling point (about 250 DEG C) by heat transfer from the aluminum plate 13, The high pressure bubble B is generated in the molten resin R in the fixed region Z of the joint portion of the CFRP composite plate 11 at the boiling point so that the aluminum plate 13 and the CFRP The joint surface F is damaged by moving to the joint interface of the composite plate 11 and breaking the joining surface F in the partial penetration state of the aluminum plate 13 to roughen the joint surface F. [

The roughness of the joint surface F is due to the fact that the high pressure bubble B expands due to a sudden pressure rise near the bonding interface between the aluminum plate 13 and the CFRP composite plate 11, It means that the irregular fine grooves G are formed by damaging the joint surface F of the aluminum plate 13 partially melted in the melted portion of the CFRP composite plate 11.

In the resin infiltration step S33, the surface treatment step S32 is performed as described above, and the molten CFRP composite plate 11 is melted at the surface F of the roughened joint portion of the aluminum plate 13, The resin (R) penetrates.

That is, in the surface treatment step S32 and the resin infiltration step S33, the high-pressure bubble B continues to blow until the heating by the laser beam LB, which is a heat source, And the molten resin R of the CFRP composite plate 11 in a molten state is infiltrated into the roughened joint surface F repeatedly.

Subsequently, the cooling step S34 is performed. In the cooling step S34, the heating through the laser beam LB as the heat source is stopped, and the CFRP composite plate 11 and the aluminum plate 13 Is gradually cooled so that the molten resin R of the CFRP composite plate 11 infiltrated on the roughened joint surface F of the aluminum plate 13 is naturally solidified to complete the joining.

4 is a cross-sectional view of a bonded portion of a specimen bonded according to a bonding method of an aluminum plate and a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention.

Referring to FIG. 4, a cross section of the specimen bonded by the above-described method of joining the aluminum plate material and the carbon fiber-reinforced plastic composite material will be enlarged. As shown in FIG. 4, the CFRP composite plate 11 and the aluminum plate material 13 The high pressure bubble B is blown at each joint boundary of the CFRP composite plate 11 into the irregular fine grooves G formed on the joint surface F of the aluminum plate 13, Of the anchor effect (AE) due to the penetration of the molten resin (R).

By the anchor effect (i.e., the anchoring effect), the CFRP composite plate and the aluminum plate material have a mechanical bonding force and are bonded.

The method of joining an aluminum plate to a carbon fiber-reinforced plastic composite plate according to an embodiment of the present invention uses a laser beam LB of a non-focal region as a heat source to change the boiling point of the aluminum plate 13 and the CFRP composite plate 11 A steel sheet material, a magnesium alloy steel sheet, or the like is also a bonding method focused on the aluminum plate material 13 as a material to be bonded to the CFRP composite plate 11, And it is possible to secure the same bonding strength through the control of the heat source.

According to the bonding method of the aluminum plate and the carbon fiber-reinforced plastic composite plate according to the embodiment of the present invention, the high-pressure bubble generated in the molten resin (R) of the CFRP composite plate 11 at the boiling point of the CFRP composite plate 11 The bonding surface F of the aluminum plate 13 is roughened so that the molten resin R of the CFRP composite plate 11 penetrates and solidifies on the roughened joint surface F And anchor effect, so that it is easy to implement an automated line in comparison with conventional bonding, adhesive taping, or mechanical bonding.

If the aluminum plate 13 and the CFRP composite plate 11 to be the raw material are not required to be subjected to different preliminary treatment and different thermal conductivities are controlled for each material and irregular flow trajectories of the high pressure bubble B generated at the boiling point are controlled, The bonding region Z can be ensured.

Further, it is possible to eliminate the joining material such as fastening parts, and it is not necessary to consider the design dimensions.

In addition, the bonding bonding has to maintain the static temperature of the adhesive, but there is no variation in bonding strength depending on the ambient temperature.

In addition, as the laser scanner 15 is utilized, it can be applied without limitation to the product shape or the bonding surface.

In addition, the plate member to be joined to the CFRP composite plate 11 can be applied to a non-ferrous metal plate such as an aluminum plate 13, as well as to an iron plate such as a steel plate or a magnesium alloy steel plate.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

11: CFRP composite plate
13: Aluminum plate
15: Laser Scanner
17: Jig
19: Pressure cylinder
21: Push rod
23: Pad
LB: laser beam
F: joint surface
G: Fine groove
PP: partial penetration
R: the molten resin
B: High-pressure bubble
Z: constant area of the joint portion of the CFRP composite plate
AE: Anchor effect

Claims (13)

A method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate,
A loading step of loading the CFRP composite plate and the aluminum plate on a jig in a state of overlapping each other;
A pressing step of pressing the upper surface of the aluminum plate to a predetermined pressure with respect to the CFRP composite plate by driving a pressurizing cylinder at an upper portion of the jig;
In the pressing step, the aluminum plate is heated with a laser beam as a heat source, and the CFRP composite plate is heated to a boiling point by heat transfer so that the high-pressure bubble generated in the molten resin blows at the joint interface, A heating and joining step in which the molten resin of the CFRP composite plate is roughened to penetrate and solidify the surface of the joining portion to join together;
And a method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate. The method according to claim 1,
The heating joining step
Wherein the CFRP composite plate is heated by irradiating a laser beam of a non-focal region with respect to the upper surface of the aluminum plate by heat transfer from the heated aluminum plate, and the surface of the joint of the CFRP plate is heated by the CFRP composite plate So as to be partially penetrated into a predetermined region of the joint of the electrode.
The high-pressure bubbles generated in the molten resin in a certain region of the joint portion of the CFRP composite plate abruptly expand and burst at the joint interface, so that the joint portion of the aluminum plate, which is in the partially penetrated state, Roughening;
Infiltrating the molten resin of the CFRP composite plate onto the roughened surface of the aluminum plate;
Removing the heat source and allowing the CFRP composite plate and the aluminum plate to cool through natural cooling so as to solidify the molten resin of the CFRP composite plate penetrated on the roughened surface of the aluminum plate,
And a method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate. 3. The method according to claim 1 or 2,
Wherein the heat input amount by the heat source is set in the range of 2 kJ / min to 2.4 kJ / min in the heating and joining step. 3. The method according to claim 1 or 2,
Wherein the heating condition of the laser beam is a welding speed of 10 mm / sec, an output of 1200 W, and an incident angle of 15 degrees in the heating and joining step. 3. The method of claim 2,
The laser beam of the non-
A method of joining an aluminum sheet material and a carbon fiber-reinforced plastic composite sheet set at a distance of 80 mm or more from the focal point. 3. The method according to claim 1 or 2,
The boiling point of the CFRP composite sheet
Wherein the temperature is lower than the melting point of the aluminum plate material. The method according to claim 6,
The boiling point of the CFRP composite sheet
A method of joining an aluminum sheet material and a carbon fiber-reinforced plastic composite sheet set within a temperature range of 240 ° C to 260 ° C. A method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate,
A loading step of loading the CFRP composite plate and the aluminum plate with the boiling point of the CFRP composite plate lower than the melting point of the aluminum plate and the aluminum plate overlapping each other on a jig;
A pressing step of pressing the upper surface of the aluminum plate to a predetermined pressure with respect to the CFRP composite plate by driving a pressurizing cylinder at an upper portion of the jig;
Heating the laser beam of the non-focal region with a heat source within a range of 2 kJ / min to 2.4 kJ / min with respect to the upper surface of the aluminum plate material by the heat transfer from the aluminum plate material to the joint portion of the CFRP composite plate, A heating step of heating the predetermined region and partially fusing the surface of the joint portion of the aluminum plate to a predetermined region of the joint portion of the CFRP composite plate;
The high-pressure bubbles generated in the molten resin in a certain region of the joint portion of the CFRP composite plate abruptly expand and burst at the joint interface, so that the joint portion of the aluminum plate, which is in the partially penetrated state, A surface treatment step of roughening the surface of the substrate;
A resin infiltration step in which the molten resin of the CFRP composite plate is infiltrated on the roughened surface of the aluminum plate;
A cooling step of removing the heat source and cooling the CFRP composite plate and the aluminum plate by natural cooling so that the molten resin of the CFRP composite plate is solidified and bonded to the roughened surface of the aluminum plate;
And a method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate. 9. The method of claim 8,
Wherein the heating condition of the laser beam is a welding speed of 10 mm / sec, an output of 1200 W, and an incident angle of 15 degrees in the heating and joining step. 9. The method of claim 8,
The laser beam of the non-
A method of joining an aluminum sheet material and a carbon fiber-reinforced plastic composite sheet set at a distance of 80 mm or more from the focal point. 9. The method of claim 8,
The boiling point of the CFRP composite sheet
A method of joining an aluminum sheet material and a carbon fiber-reinforced plastic composite sheet set within a temperature range of 240 ° C to 260 ° C. A method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate,
A loading step of loading the CFRP composite plate and the aluminum plate with the boiling point of the CFRP composite plate lower than the melting point of the aluminum plate and the aluminum plate overlapping each other on a jig;
A pressing step of pressing the upper surface of the aluminum plate to a predetermined pressure with respect to the CFRP composite plate by driving a pressurizing cylinder at an upper portion of the jig;
In the pressurizing step, the aluminum plate was pressed against the upper surface of the aluminum plate at a welding speed of 10 mm / sec, an output of 1200 W, an incident angle of 15, and an input heat quantity of 2 kJ / min to 2.4 kJ / min Heating a predetermined region of the bonding portion of the CFRP composite plate by heat transfer from the aluminum plate heated by irradiating a laser beam of a non-focal region having a distance of 80 mm or more from the focal point under the set heating condition, A heating step of partially infiltrating the surface of the CFRP composite plate into a predetermined region of the CFRP composite plate;
The high-pressure bubbles generated in the molten resin in a certain region of the joint portion of the CFRP composite plate abruptly expand and burst at the joint interface, so that the joint portion of the aluminum plate, which is in the partially penetrated state, A surface treatment step of roughening the surface of the substrate;
A resin infiltration step in which the molten resin of the CFRP composite plate is infiltrated on the roughened surface of the aluminum plate;
A cooling step of removing the heat source and cooling the CFRP composite plate and the aluminum plate by natural cooling so that the molten resin of the CFRP composite plate is solidified and bonded to the roughened surface of the aluminum plate;
And a method of joining an aluminum plate material and a carbon fiber-reinforced plastic composite plate. 13. The method of claim 12,
The boiling point of the CFRP composite sheet
A method of joining an aluminum sheet material and a carbon fiber-reinforced plastic composite sheet set within a temperature range of 240 ° C to 260 ° C.
KR1020140187640A 2014-12-23 2014-12-23 Welding method for aluminium sheet and carbon fiber reinforced plastics sheet KR20160076940A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114072961A (en) * 2019-07-02 2022-02-18 株式会社村田制作所 Composite molded body, method for producing same, battery pack, electric tool, and electric vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114072961A (en) * 2019-07-02 2022-02-18 株式会社村田制作所 Composite molded body, method for producing same, battery pack, electric tool, and electric vehicle

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