KR100620413B1 - Apparatus and method for cladding sheet metal - Google Patents

Abstract

The present invention relates to a metal foil bonding apparatus and a method thereof, and an object thereof is to provide a bonding apparatus and a method for joining a predetermined portion of a pair of metal foil, such as an edge portion, to form a thin heat pipe and the like. .

In order to achieve the above object, the bonding apparatus of the metal thin plate according to the present invention comprises a pair of thermally conductive jigs for receiving the bonded metal thin plates, each of which has a bonding material layer formed on the bonding surface, and supporting the outer side of the bonding portion; A pair of dies for fixing the respective jigs and having heating means for temporarily heating the joint portion in a range higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined, and cooling means for cooling it again; And a frame having a structure such that the pair of dies are each connected and open and close to each other.

In addition, the method of joining a metal thin plate according to the present invention comprises supplying a high temperature heat medium oil to a heat medium oil flow path in a die in thermal contact with the jig to heat the joining part to melt the joining material and to cool the joining part. Solidifying the bonding material.

Metal sheet, bonding, soldering, thin heat pipe, heating oil, electric heater

Description

Bonding device of metal sheet and its method {Apparatus and method for cladding sheet metal}             

1 is a schematic view showing an embodiment using a heat medium oil as a metal sheet bonding apparatus according to the present invention.

FIG. 2 is a detailed view of a jig and a die according to the embodiment of FIG.

Figure 3 is a schematic diagram showing an embodiment using an electric heater as a metal sheet bonding apparatus according to the present invention.

Figure 4 is a state diagram showing a bonded portion bonded by a metal thin plate bonding apparatus according to the present invention.

5 is a flow chart according to the metal sheet bonding method according to the present invention.

* Description of important parts of drawing

10: upper die 20: lower die

50: metal sheet to be bonded 11: upper jig

21: Lower jig 12,22: Heat medium distribution channel

16, 26: hot wire 17, 27: fixed bolt

30: heat medium oil supply device 35: hot wire control unit

40: heat medium oil recovery device 51: junction

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a metal foil bonding apparatus and a method thereof, and more particularly, to a bonding apparatus and a method for joining a predetermined portion of a pair of metal foils, such as an edge portion, to form a thin heat pipe or the like.

In general, as a method of joining a metal thin plate, there is a method by soldering such as brazing or soldering and a method by welding such as plasma welding or laser welding depending on the type of metal thin film to be joined.

Welding is performed in the process of partially melting and solidifying again the joint of the metal member to be joined. As described above, in order to completely seal the interior formed by the bonding of copper or aluminum thin plates, plasma welding or laser welding is possible. However, since the cost is significantly higher than that of soldering, there is a problem in that the economy is inferior.

Soldering uses a bonding material having a melting point lower than that of the metal to be joined, and the molten bonding material is evenly penetrated between the metals on both sides by capillary action to solidify the metal to be joined. Soldering is called soldering when the temperature is about 430 ° C. or lower depending on the melting temperature of the bonding material, and brazing is used when the soldering temperature is higher than that.

However, in the case of joining a metal thin plate by such soldering, an existing soldering or brazing method using a torch or a furnace is used to join the upper and lower thin plates of a thin heat pipe using a thin plate such as copper, copper alloy, or aluminum. There are various problems.

For example, when brazing using a torch, it is difficult to fix the thin plate to be joined, and when using a furnace, the number of metal thin plates to be joined at the same time is determined by the jig for fixing each metal thin plate. There are problems such as being limited by the number. In addition, there is a problem that the productivity is greatly reduced since it takes a long time until the bonding material is cooled and completely solidified after heating.

Therefore, the present invention has been proposed to solve the above problems, so that the bonding surface of the metal sheet is completely in contact with each other so that no liquid or gas can pass through the bonding portion, and the soldering method is performed at a low cost by melting the bonding material. It is an object of the present invention to provide a bonding apparatus and a method for bonding a metal thin plate that can increase the productivity by performing the over-solidification process quickly.

Therefore, in order to achieve the object of the present invention, the bonding apparatus for metal thin plates according to the present invention accommodates the bonded metal thin plates, each of which has a bonding material layer formed on the bonding surface inside the bonding portion, in accordance with its shape, and supports the bonding portion outside. Pair of thermally conductive jig; A pair of fixing means for each jig, and a heating means for temporarily heating the joining portion through the jig higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined, and cooling means for cooling it again. Die; And a frame having a structure such that the pair of dies are each connected and open and close to each other. The metal thin plate according to the present invention is to form a heat pipe by joining a thin metal, as mentioned in the prior art, which is a metal thin plate such as copper or copper alloy or aluminum that is generally used in the technical field of the present invention. The metal thin plate may be cut by an NC machine or press working generally used in the art.

Here, the heating means may be formed as a flow path formed inside the die and in contact with the thermally conductive jig, and a device for supplying high temperature heat medium oil having a temperature range as described above to the flow path.

As another type of heating means, an electric heater or one side of the heating wire built in contact with the thermal conductive jig and a control unit for supplying electric power to the heating wire or one side contacts the thermal conductive jig and the other side is heated to the temperature range. It may be implemented as a heat pipe that is in contact with a high heat source having a high temperature and thermal conductivity such as a lead molten liquid. In addition, since the heat pipe is generally used as a heat dissipation device, the heat pipe is heated and cooled by providing a high heat source for heating the heat pipe and a low heat source for cooling the heated heat pipe on the other side of the heat pipe. Can be used as

When the joining portion is heated by the heating means, the joining material layer provided inside the joining portion of the metal foil to be joined is melted, and the joining surface is wetted and melted, and then cooled and solidified to form a joining between the metal foils.

As in general soldering, the base metal sheet is not melted, but the bonding material must be melted to wet the fine gaps between the metal sheets. Thus, the heating temperature by the heating means is higher than the melting point temperature of the bonding material and the metal sheet to be joined. The melting point is lower than the temperature.

In order to increase the productivity of the metal thin plate bonding apparatus according to the present invention, cooling means for rapidly cooling the heated joints while maintaining the quality of the joints are required. Such cooling means may also be implemented by various configurations.

For example, a cooling fin may be formed on the thermally conductive jig or a die in contact with the die, and cooled by air cooling. The cooling fin may be cooled by water together with the cooling fin, or may be separately contacted with the thermally conductive jig. The cooling effect can be obtained by forming a refrigerant flow path of the liquid crystal and circulating a refrigerant such as cooling water or low temperature heat medium oil.

The heating means and the cooling means as described above may be various combinations depending on the selected. However, in the case of distributing high temperature heat medium oil in the flow path contacting the thermally conductive jig as the heating means and the flow path, the heat medium oil supply device capable of selectively supplying the high temperature heat medium oil and the low temperature heat medium oil to the flow path. It is preferable to have a heating and cooling to be effective.

The heat medium oil supply device sequentially supplies high temperature and low temperature heat medium in order of melting and solidifying the bonding material. In addition, the high temperature or low temperature heat medium oil passing through the heat medium oil distribution path is recovered according to the temperature and the heat medium oil separation recovery device for returning to the heat medium oil supply device further includes energy required for heating and cooling the heat medium oil You can save.

The heat medium oil separating and recovering device preferably stores the heat medium oil, which has passed through the distribution path and returned through the recovery line, by mechanically dividing the flow path according to the temperature or the time required for distribution, to store the heat medium oil in each of the high and low temperature heat medium storage units. Do.

In addition, at least one side of the pair of die is provided with a pneumatic or hydraulic piston between the frame to open and close the pair of die, the die is received in each jig when the pair of die is closed facing each other The joint of the metal foil to be joined can be pressurized.

The structure for opening and closing the die fixed with the jig for positioning the bonded metal thin plate to be joined and separating the finished joint is not only a structure operated by a pneumatic or hydraulic piston as described above, but also a gear and a cam connected thereto. It may be implemented as a structure that is operated through a mechanism such as or operated through a manual lever and a mechanism connected to the lever. This is a structure that can be easily implemented by those skilled in the art for the design of the mechanism will not be described in detail here.

In order to achieve the object of the present invention, the joining method of the metal thin plate according to the present invention is to prepare a bonded metal thin plate formed with a bonding material layer formed on the joining surface inside at least one side of the joining pair of metal thin plates, wherein the joining material Although may be provided only in the joint surface, in the case of plating or coating may be provided on the front surface including the joint surface, in this case, the joint may be cleanly finished without additional post-treatment, the bonding material is to be joined A first step consisting of resin, lead, lead-free, or braze depending on the type of metal sheet and the temperature of the environment in which the joint is to be used; According to the shape to be bonded to the bonded metal foil to be bonded to each other in the thermally conductive jig, at this time, temporarily fixed to prevent both sides of the thin plate in the process of receiving the bonded metal foil in the thermally conductive jig. A second step of completely fixing it again after it is received; Through the thermally conductive jig, the junction is heated by a method such as a high temperature heat medium oil, an electric heater, or a heat pipe connected to a high heat source to a temperature higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal sheet to be joined. A third step of melting the bonding material; And a fourth step of solidifying the bonding material such that the pair of bonded metal thin plates are bonded to each other by cooling the bonding portion by a method such as air cooling, water cooling, or low temperature heat medium oil.

The metal foil to be joined may be bonded as a pair of thin plates by overlapping all or part of each other according to a purpose. As an example, the pair of thin metal plates may be bonded to each other to form a filler in the internal space so as not to leak.

In this case, the bonding material may be resin, lead, lead-free, or braze depending on the type of the metal foil to be joined and the environment of use of the bonding, and may be plated, coated, or coated on the bonding surface of the thin plate in advance, or on both sides of the joint. It may be provided in a thin plate shape in between.

Figure 1 is a schematic diagram showing an embodiment using a heat medium oil as a metal sheet bonding apparatus according to the present invention. As shown in the figure, the frame 100 is provided with a pair of dies 10 and 20 having an opening and closing structure that is closed by being close to each other and facing away from each other. The heat conductive jig 11, 21 is fixed in each die 10, 20 so that the heat medium flow channels 12, 22 are formed and are in thermal contact therewith, that is, the heat transfer is performed smoothly. The heat medium oil used in this embodiment is generally used in the heat transfer medium of indirect heating or a cooling device, and includes petroleum oil and synthetic oil oil. For example, the synthetic oils include phenyl ether, polyphenyl, aryl alkane, alkylbenzene, etc. The synthetic oils are preferred as the thermal oils because the synthetic oils have better thermal oxidation stability, lower vapor pressure, and excellent corrosion protection than the petroleum. .

The pair of dies 10 and 20 may be arranged in various ways such as up, down, left, and right, and at least one side may have a structure that can be opened and closed by moving with respect to the frame 100 by a predetermined mechanism. In the present embodiment, the lower die 20 is fixed to the frame 100 and the upper die 10 has a structure of opening and closing while reciprocating up and down by the piston 15 fixed to the frame.

The upper and lower jigs 11 and 21 face each other to accommodate the metal foil 50 to be joined, and contact the outside of the bonding portion so that the bonding surface of the metal foil 50 to be bonded has an appropriate gap. Pressurize with pressure and transfer heat.

The jig (11, 21) formed to fit the shape of the metal foil to be joined 50 can be replaced as the shape of the joint is changed by being detachably coupled to the die (10, 20). Therefore, it is preferable that the jig 11 and 21 are tightly coupled to the die 10 and 20 by bolts or the like, respectively.

The dies 10 and 20 and the jig 11 and 21 may be formed between the heat medium oil circulated in the heat medium oil flow paths 12 and 22 in the dies 10 and 20 and the joint portion of the metal foil 50 to be joined. It is preferable to be formed of a metal material having a high thermal conductivity so that heat can be well transmitted. As a metal material with high thermal conductivity, copper, aluminum, tungsten, the alloy of the said material, etc. are mentioned, for example. Further, in order to shorten the time taken for heating and cooling, it is advantageous to shorten the distance between the heat medium oil and the joining portion, so that the flow passages 12 and 22 are more preferably formed to be close to the jig 11 and 21.

The heat medium oil flow passages 12 and 22 have inlets 13 and 23 and outlets 14 and 24, respectively. The inlets 13 and 23 are connected to the heat medium oil supply device 30 through the heat medium oil supply line, and the outlets 14 and 24 are connected to the heat medium oil recovery device 40 through the heat medium oil recovery line.

At this time, the heat medium oil supply device 30 is provided with a low temperature heat medium oil storage unit 31 and a high temperature heat medium oil storage unit 32, and the high temperature or low temperature heat medium oil selectively through the supply line through the distribution line And a control valve 33 and a transfer pump (not shown) for supplying to (12, 22).

In addition, the heat medium oil recovery device 40 is a high temperature and low temperature in consideration of the time the heat medium oil is discharged to the outlet (14, 24) side depending on the temperature or the heat medium oil input to the inlet (13, 23) side The apparatus may further include an apparatus (not shown) for separating and collecting the heat medium oil and returning the heat medium oil to the high temperature or low temperature heat medium oil storage units 31 and 32 of the heat medium oil supply device 30, respectively.

FIG. 2 is a detailed view showing a jig and a die according to the embodiment of FIG. As shown in the figure, the metal foil 50 to be joined is accommodated in the upper and lower jigs 11 and 21. The pair of jig may be in contact with the outside of the bonding portion 51 of the metal foil to be joined to fix and press it.

The upper jig 11 is fastened so that the upper die 10 and the lower jig 21 are in close contact with the lower die 20 by bolts 17 and 27, respectively. Therefore, the heat medium oil circulated in the flow paths 12 and 22 in the upper and lower dies 10 and 20 is bonded to each other through the dies 10 and 20 and the jig 11 and 21 formed of a thermally conductive material, respectively. Heat can be exchanged with the junction part 51 of the thin plate 50. In order to assist heat transfer, the bolts 17 and 27 may also be made of a metal having high thermal conductivity.

The flow passages 12 and 22 should be in thermal contact with the thermally conductive jig 11 and 21. This does not necessarily mean a close adhesion on the distance, it means that the heat transfer is carried out quickly and smoothly through a medium having high thermal conductivity.

By replacing the upper and lower jig (11, 21), it is possible to join a metal thin plate of various shapes, in particular, a thin portion having a junction 52 is formed in the periphery, the space 52 for filling the refrigerant therein It is useful for the manufacture of pipes.

Figure 3 is a schematic diagram showing an embodiment using an electric heater as a metal sheet bonding apparatus according to the present invention. The heating wires 16 and 26 are provided inside the dies 10 and 20 to be in thermal contact with the respective jigs 11 and 21, and the jig is provided by supplying electric power to the heating wires through a predetermined control unit 35. The junction part of the to-be-joined metal plate 50 accommodated in can be heated.

The control unit 35 may control and supply power capable of heating to an appropriate temperature by measuring and feeding back a temperature of the junction of the metal foil to be joined or a jig close thereto.

Fig. 4 is a state diagram showing a joined object bonded by a metal thin plate bonding apparatus according to the present invention. As shown in (a), not only the metal thin plate 50 which is pressed into both sides to form a space therein, but also as shown in (b), the metal thin plate 50 ' which is flat on one side and pressed on one side is concave. It can be bonded by the bonding apparatus according to the present invention.

In addition, it can be used for joining various types of metal thin plates simply by replacing the jig according to the shape of the joint. For example, as shown in (c), the joint 51 may be formed around and in the middle of the metal thin plate 50.

5 is a flow chart according to the metal sheet bonding method according to the present invention. First, a bonding material is plated, coated or coated on the bonding surface of the metal foil, or a bonded metal foil provided in a thin plate shape between both bonding surfaces is prepared (s1). The bonding material may be provided only on the bonding surface, but the plating is performed. In the case of the coating may be provided on the front surface including the bonding surface, in this case there is an advantage that the joint is cleanly finished without a separate post-treatment. The bonding material may be made of resin, lead, lead-free, or braze depending on the type of metal foil to be joined and the temperature of the environment in which the joint is to be used.

Next, the bonded metal thin plates are accommodated in the jig by joining the joining surfaces to each other according to the form to be joined (s2). It can also be temporarily fixed in order to prevent both sides of the sheet from shifting during the bonding process.

In the step (s3) of melting the bonding material by heating the bonding portion to a temperature higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined through the thermally conductive jig, as the heating means, as described above, Various methods can be used, such as heat medium oil, electric heater, or a heat pipe connected to a high heat source.

As described above, in the step (s4) of solidifying the bonding material such that the pair of joined metal thin plates are joined to each other by cooling the bonding portion, various methods such as air cooling, water cooling, and low temperature heat medium oil may be used as the cooling means. .

In the case of heating and cooling using high temperature and low temperature heat medium oil, after the joining part is fixed in the form of a sandwich of a metal thin plate, a joining material, and a metal thin plate, a high temperature heat medium oil is applied to the heat conductor around the jig which is in contact with the joining surface. The bonding material is melted by supplying and heating, and the molten bonding material penetrates into the fine gaps between the metal sheets to be joined to wet the bonding surface.

Subsequently, the bonding material is solidified by supplying a low temperature heat medium oil to the heat conductor around the jig and rapidly cooling it. The thin metal plate may be bonded to solidify the bonding material penetrated into the fine gap so that no gas or liquid substance can pass therethrough. In this embodiment, as a method of rapidly cooling by supplying a low temperature heat medium oil to the heat conductor around the jig, for example, it can be made by the heat medium oil supply device (30). That is, after the high temperature heat medium oil is supplied from the heat medium oil supply device 30, a low temperature heat medium oil is supplied by a control unit such as a general sensor so that gas or liquid substance passes through the fine gap between the metal sheets to be joined. Can be cooled quickly.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common knowledge in the field of the present invention that various substitutions and modifications and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have.

Therefore, by appropriately fixing or pressing the soldered portion of the metal foil to be joined to prevent the liquid or gas from passing through the bonded surface, and by heating the hot and cold heat medium in sequence, the joint is quickly heated and cooled again. By shortening the time to solidify the bonding material has the effect of maximizing productivity, significantly reducing the defective rate.

In addition, compared with the case of joining using a welding method such as plasma welding or laser welding, there is an effect that the cost required for the joining can be greatly reduced.

In particular, the bonding apparatus and method of the metal thin plate according to the present invention, in a thin heat pipe manufactured by bonding a metal thin plate such as copper, copper alloy or aluminum so as to be completely sealed inside, is fixed by a jig and bonded as described above. The desired shape can be obtained, and there is an effect that high productivity can be obtained at a low cost.

Claims (16)

A pair of thermally conductive jigs each receiving a bonded metal thin plate having a joining material layer formed on a joining surface inside the joining portion in accordance with its shape and supporting the joining portion outside; A pair of fixing means for each jig, and a heating means for temporarily heating the joining portion through the jig higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined, and cooling means for cooling it again. Die; And A frame having a structure such that the pair of dies are each connected and open and close to each other, Joining device for metal sheets. The method of claim 1, The heating means, A heat medium oil flow passage formed in the die and in thermal contact with the thermally conductive jig; And It includes a heat medium oil supply device for supplying a high temperature heat medium oil to the heat medium oil distribution passage, Joining device for metal sheets. The method of claim 1, The heating means and cooling means, A heat medium oil flow passage formed in the die and in thermal contact with the thermally conductive jig; And And a heat medium oil supply device for sequentially supplying low temperature heat medium oil to cool the joint after supplying high temperature heat medium oil to the heat medium oil flow path. Joining device for metal sheets. The method of claim 1, The heating means, An electric heater formed inside the die and having a heat wire that is in thermal contact with the heat conductive jig and a control unit that supplies power to the heat wire and controls the temperature thereof; Joining device for metal sheets. The method of claim 1, The cooling means, A refrigerant flow path formed inside the die and in thermal contact with the thermally conductive jig; And And a coolant supply device for supplying a low temperature coolant to the coolant flow path after heating by the heating means is performed. Joining device for metal sheets. The method of claim 1, The heating means and cooling means, A heat pipe having one side inserted into the die to be in thermal contact with the thermally conductive jig; And A high heat source provided on the other side of the heat pipe to heat the heat pipe and a low heat source to cool the heated heat pipe; Joining device for metal sheets. The method of claim 1, At least one side of the pair of dies has a pneumatic or hydraulic piston between the frame to open and close the pair of dies, and when the pair of dies are closed to face each other, the to-be-joined accommodating each jig Pressurizing the joint of the metal foil, Joining device for metal sheets. A pair of thermally conductive jigs each receiving a bonded metal thin plate having a joining material layer formed on a joining surface inside the joining portion in accordance with its shape and supporting the joining portion outside; A pair of dies for fixing the respective jigs and having a heat medium oil flow path through which heat medium oil can be flowed; A heat medium oil supply device for supplying a high temperature heat medium oil through the heat medium oil flow path so as to temporarily heat the junction in a range higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined; And A frame having a structure such that the pair of dies are each connected and open and close to each other, Joining device for metal sheets. The method of claim 8, The heat medium oil supply device sequentially supplies a low temperature heat medium oil to cool the joint after supplying the high temperature heat medium oil, Joining device for metal sheets. The method of claim 9, Further comprising a heat medium oil separation recovery device for separating the high temperature or low temperature heat medium oil passing through the heat medium oil distribution path according to the temperature and returning to the heat medium oil supply device, Joining device for metal sheets. The method of claim 8, At least one side of the pair of dies is provided with a pneumatic or hydraulic piston between the frame to open and close the pair of dies, and when the pair of dies are closed to face each other, the to-be-joined accommodating each jig To press the junction of the metal sheet, Joining device for metal sheets. A first step of preparing a bonded metal thin plate having a bonding material layer formed on a bonding surface inside at least one side of a pair of metal thin plates to be bonded; A second step of accommodating the metal foil to be joined to each other with their bonding surfaces to be received in a thermally conductive jig; A third step of melting the bonding material through the thermally conductive jig by heating the bonding part to a temperature higher than the melting point temperature of the bonding material and lower than the melting point temperature of the metal foil to be joined; And And a fourth step of solidifying the bonding material such that the pair of metal foils to be joined are bonded to each other by cooling the bonding portion. Joining method of metal foil. The method of claim 12, The bonding material is provided by any one of plating, coating or coating in advance on the bonding surface of the metal thin plate, or is provided in a thin plate shape between both bonding portions Joining method of metal foil. The method of claim 12, Heating the joint by heat exchange by supplying a high temperature heat medium oil by a heat medium oil supply device to a heat medium oil flow passage formed to thermally contact the jig in a third step. Joining method of metal foil. The method of claim 12, Heating the junction by high temperature heat by supplying electric power through a control unit to a heating wire formed to thermally contact the jig in a third step. Joining method of metal foil. The method of claim 12, Cooling the joint by supplying a low temperature heat medium oil to a heat medium oil flow path formed to thermally contact the jig in a fourth step Joining method of metal foil.

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