KR102385964B1 - device for induction welding - Google Patents

Abstract

The present invention is to provide an induction welding apparatus capable of simultaneously pressurizing and cooling a material to be welded. According to an embodiment of the present invention, an induction welding apparatus comprises: a pressing unit in contact with a back surface of a second layer in a state in which a first layer is supported by the work state, and pressurizing the second layer in the direction of the first layer to maintain contact between the first layer and the second layer; and an induced current generating unit for inducing an eddy current to flow in at least one of the first layer and the second layer.

Description

Induction welding device {device for induction welding}

The present invention relates to an induction welding apparatus.

In general, welding refers to a technique for joining by heating the same or different types of materials to be welded. Such welding can be broadly classified into a welding method in which the materials to be welded are attached by heating and melting the joint, and a pressure welding method in which the materials to be welded are attached by applying a high pressure from the outside of the joint.

On the other hand, in general, induction heating refers to a method of heating an object using electromagnetic induction. Specifically, it is a method of inducing an induced current to a conductive object to be heated, and heating the conductive object using heat generated when the induced current flows through the conductive object.

The problem to be solved by the present invention is to provide an induction welding apparatus capable of simultaneously pressurizing and cooling a material to be welded.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Induction welding apparatus according to an embodiment of the present invention for solving the above problems, in a state in which the first layer is supported by the work stage, is in contact with the back surface of the second layer and forms the second layer with the first and a pressing unit for maintaining contact between the first layer and the second layer by pressing in the layer direction, and an induced current generating unit for inducing an eddy current to flow in at least one of the first layer and the second layer.

The induced current generating unit includes a coil electrically connected to a power source to induce the eddy current, and the pressurizing unit has the coil disposed therein and is provided to be able to move up and down with respect to the back surface of the second layer in a lowered state. It may include a housing that presses the rear surface of the second layer.

The housing may be formed so as to be able to move up and down relative to the coil so that a relative distance between the one surface of the first layer and the coil is maintained even when the housing is lifted.

The pressurizing unit includes a cooling passage through which a cooling fluid flows to lower the temperature of the second layer while the pressurizing unit is in contact with the back surface of the second layer.

A fluid supply unit supplying the cooling fluid to the cooling passage, a sensor measuring the temperature of the second layer, and receiving a temperature measurement value from the sensor to monitor the temperature of the second layer, the temperature of the second layer The controller may further include a control unit for controlling the fluid supply unit to increase the supply amount per unit time of the cooling fluid when the temperature rises above the set temperature.

The pressing unit may include a pressing layer, wherein at least a portion is in contact with the second layer and elastically deformed according to a shape of a surface of the second layer in a state in which the pressing unit presses the second layer.

It may further include a sensor disposed on the pressure layer to measure the temperature of the back surface of the second layer in a state in which the pressure unit presses the second layer.

Other specific details of the invention are included in the detailed description and drawings.

According to the embodiments of the present invention, there are at least the following effects.

It has a compact pressing structure, so that the user can easily maintain the contact state of the materials to be welded during the welding process. Moreover, it can cool while pressurizing a to-be-welded material.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a view illustrating that the induction welding apparatus according to an embodiment of the present invention welds a first layer and a second layer.
2 is a view illustrating that eddy currents are induced by a coil disposed in an induction welding apparatus according to an embodiment of the present invention.
3 is a view illustrating a cooling passage installed in the induction welding apparatus according to an embodiment of the present invention and a fluid supply unit connected to the cooling passage.
4 is a diagram schematically illustrating a state in which the induction welding apparatus according to an embodiment of the present invention is pressing the second layer.
FIG. 5 is an enlarged view of a portion indicated by a dotted line in FIG. 4 , in which the pressure layer is elastically deformed according to the shape of the surface of the second layer while the second layer is pressed.
6 is a block diagram of an induction welding apparatus according to an embodiment of the present invention.
7 is a view schematically showing an induction welding apparatus according to another embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

Further, the embodiments described herein will be described with reference to cross-sectional and/or schematic diagrams that are ideal illustrative views of the present invention. Accordingly, the shape of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. In addition, in each of the drawings shown in the present invention, each component may be enlarged or reduced to some extent in consideration of convenience of description. Like reference numerals refer to like elements throughout.

The term 'induction welding' referred to below refers to a welding method in which a welding area is heated using an induction heating principle.

The 'material to be welded' mentioned below may be a thermoplastic material. However, it is not limited thereto, and the material to be welded means a material that can be welded, such as metal or plastic. In addition, the material to be welded may be provided with a material having conductivity to enable induction heating by an induction welding device.

The 'work stage' mentioned below may be a stage in which a user uses a welding device to weld materials to be welded. For example, the work stage may be a flat floor or a work bench having a flat surface.

The 'first layer' referred to below means a material to be welded disposed on the work stage. In addition, the 'second layer' referred to below means a material to be welded to be welded with the first layer.

Hereinafter, the present invention will be described with reference to the drawings for explaining an induction welding apparatus according to an embodiment of the present invention.

1 is a view illustrating that the induction welding apparatus according to an embodiment of the present invention welds a first layer and a second layer. In addition, FIG. 2 is a view illustrating that eddy current is induced by a coil disposed in an induction welding apparatus according to an embodiment of the present invention.

As shown in FIG. 1 or FIG. 2 , the induction welding apparatus 1 according to an embodiment of the present invention includes a pressing unit 100 and an induced current generating unit 200 .

The pressing unit 100 refers to a component that presses one surface of a material to be welded so that the materials to be welded to be welded maintain a contact state during welding. Specifically, the pressing unit 100 may be a component that presses one surface of the welding target disposed above among the welding targets stacked on the work stage 3 . For example, referring to FIG. 1 , the pressing unit 100 applies the second layer 5 to the first layer 4 or to the first layer 4 so that the first layer 4 and the second layer 5 maintain a contact state. It can be pressed in the direction of the stage 3 .

For example, the pressing unit 100 may include a housing 110 and an actuator 120 .

Here, the housing 110 may be a component surrounding the coil 210 so that the coil 210 of the induced current generator 200 is disposed therein. For example, the housing 110 may have a rectangular container shape surrounding the coil 210 . However, the shape of the housing 110 is not limited thereto, and the shape of the housing 110 may be formed in various ways.

In addition, at least a portion of the housing 110 may be made of an insulating material capable of passing a magnetic field formed by the coil 210 .

For example, so as not to affect the magnetic field formed by the coil 210, the entire housing 110 may be formed of an insulating material through which the magnetic field can pass. For example, the housing 110 may be formed of ceramic, which is an insulating material capable of passing a magnetic field by a coil. Specifically, the housing 110 may be a mold formed of ceramic.

Alternatively, in consideration of material cost, only a portion of the housing 110 including the lower surface of the housing 110 may be made of ceramic.

Here, the ceramic may be selected as a material having excellent heat resistance so that the housing 110 is not damaged by heat generated during the induction welding process.

That is, in the induction welding apparatus 1 according to an embodiment of the present invention, the housing 110 is formed of ceramic having excellent heat resistance while passing the magnetic field generated by the coil 210, and an eddy current is induced in the material to be welded. It can have excellent durability without being damaged by the heat of welding without interfering with it.

For example, the ceramic material forming the housing 110 may be provided in a silicon carbide (Sic) or aluminum nitride (AIN) series.

Meanwhile, the lower surface of the housing 110 may be provided to press the surface of the material to be welded with a uniform force. For example, the lower surface of the housing 110 may be formed to be flat and provided so as to be in surface contact with the plate-shaped material to be welded.

In addition, with reference to FIG. 1 , the housing 110 may be provided so as to be liftable with respect to the work stage 3 by the actuator 120 . For example, the housing 110 may be formed to be able to move up and down relatively with respect to the coil 210 . Specifically, even if the housing 110 is raised and lowered by the actuator 120, the coil 210 is positioned at a relative distance from the work stage 3 (or disposed on the work stage) regardless of the raising and/or lowering of the housing 110 . It may be coupled to the housing 110 to maintain a relative distance to the welding target). Alternatively, the coil 210 may be connected to the housing 110 so as to move up and down along the housing 110 .

The actuator 120 is a component that is connected to the housing 110 to elevate the housing 110 in the direction of the material to be welded. Specifically, the actuator 120 may be a component that elevates the housing 110 in a mechanical manner. For example, the actuator 120 may be a driving device for elevating the housing 110 based on hydraulic pressure, pneumatic pressure, or electricity. Alternatively, the actuator 120 may be a driving device for elevating the housing 110 including a link (not shown) connected to a motor (not shown).

The induction current generator 200 is a component for inducing an eddy current C for induction heating in the material to be welded. 1 or 2 , the induced current generator 200 may include a coil 210 and a power supply 220 .

The power supply 220 is a component connected to a DC power (not shown) or an AC power (not shown) so that power is applied to the coil 210 . That is, the power supply 220 is a component that electrically connects the coil 210 and AC power or DC power.

Specifically, the power supply 220 may be provided so that AC power is applied to the coil 210 . For example, the power supply 220 may be electrically connected to an AC power source (not shown) so that the AC power is applied to the coil 210 . Alternatively, the power supply 220 may be connected to a DC power supply (not shown), and may include an inverter (not shown) so that AC power is applied to the coil 210 .

Also, the power supply 220 may be provided to change the frequency and/or the AC voltage supplied to the coil 210 .

On the other hand, the coil 210 is a component that induces an eddy current (C) in the material to be welded while receiving power from the power supply unit 220 . For example, the coil 210 may be wound copper or a high-conductivity conductor.

When AC power is applied to the coil 210 , an AC magnetic field according to the AC current is generated. By the generated alternating current magnetic field, an induced current in the form of a vortex flows through the material to be welded. The induced current in the form of a vortex formed at this time is called an eddy current (C; Eddy Current).

When an eddy current (C) flows through at least one of the two materials to be welded while the two materials to be welded are in contact, the materials to be welded are heated by joule's heat. For this reason, when the temperature of the portion where the materials to be welded is heated to a certain temperature or higher, the contacted portions of the two materials to be welded are melted and mixed, thereby joining the two materials to be welded.

3 is a view illustrating a cooling passage installed in the induction welding apparatus according to an embodiment of the present invention and a fluid supply unit connected to the cooling passage.

As shown in FIG. 3 , the induction welding apparatus 1 according to an embodiment of the present invention may further include a fluid supply unit 300 . Also, as shown in FIG. 3 , the pressing unit 100 may include a cooling passage 130 .

The fluid supply unit 300 is a component that supplies a cooling fluid to the cooling passage 130 formed in the pressurizing unit 100 . Specifically, the fluid supply unit 300 may include a tank 330 , a supply pipe 310 , and a drain pipe 320 .

The tank 330 is a container in which a cooling fluid is stored. Although not shown, a pump (not shown) for pumping the cooling fluid to flow into the supply pipe 310 may be installed inside the tank 330 .

The cooling fluid may be a fluid that cools heat generated during a welding process. For example, the cooling fluid may be air, liquid nitrogen, an inert gas or water.

The supply pipe 310 may be a hose or pipe that transports a cooling fluid to the cooling passage 130 . Meanwhile, the drain pipe 320 may be a hose or pipe that transports the cooling fluid discharged from the cooling passage 130 back to the tank 330 .

On the other hand, the cooling passage 130 is formed in the pressurizing unit 100 is a flow passage through which the cooling fluid moves. Specifically, the cooling passage 130 may be formed in the housing 110 . For example, as shown in FIG. 3 , the cooling passage 130 may be formed inside the housing 110 to pass a position adjacent to the material to be welded while the housing 110 presses the material to be welded. . For example, the cooling passage 130 may be formed to pass through the upper side of the lower surface of the housing 110 .

In addition, as shown in FIG. 3 , the cooling passage 130 may be formed in a zigzag shape so that the surface area of the housing 110 in contact with the cooling fluid is increased.

4 is a diagram schematically illustrating a state in which the induction welding apparatus according to an embodiment of the present invention is pressing the second layer. In addition, FIG. 5 is an enlarged view of a portion indicated by a dotted line in FIG. 4 , in which the pressure layer is elastically deformed according to the shape of the surface of the second layer while the second layer is pressed.

4 or 5 , the pressing unit 100 of the induction welding apparatus 1 according to an embodiment of the present invention may further include a pressing layer 140 .

The pressure layer 140 is provided on the lower surface of the housing 110 and is in direct contact with the material to be welded. Specifically, the surface of the pressure layer 140 may be elastically deformed according to the shape of the surface of the material to be welded when the housing 110 presses the material to be welded. For this reason, regardless of the shape of the surface of the material to be welded, the pressing unit 100 can press the surface of the material to be welded in a uniform or similar distribution of force.

To elastically deform the surface, the pressure layer 140 may be made of a material having elasticity. In addition, the pressure layer 140 may be formed of an insulating material so as not to be affected by the magnetic field of the coil 210 . Also, the pressure layer 140 may be made of a material having excellent heat resistance. For example, the pressure layer 140 may be made of Teflon, rubber, or the like.

Meanwhile, the induction welding apparatus 1 according to an embodiment of the present invention may further include a sensor 400 . The sensor 400 may be a component that measures the temperature of the surface of the material to be welded. For example, the sensor 400 may be a non-contact or contact-type temperature measuring sensor. For convenience of description, the following description is made on the assumption that the sensor 400 is a contact sensor, but is not limited thereto.

The sensor 400 may be disposed on the surface of the pressure layer 140 . For example, the sensor 400 may be disposed on a surface in contact with the material to be welded in the pressure layer 140 . In this case, the sensor 400 may measure the temperature of the surface of the material to be welded while the pressure layer 140 presses the material to be welded.

4 illustrates that two sensors 400 are disposed on the pressure layer 140 according to an embodiment of the present invention, but the present invention is not limited thereto. For example, a plurality of sensors 400 may be disposed on the surface of the pressure layer 140 at uniform intervals. As another example, one sensor 400 may be disposed on the pressure layer 140 .

The sensor 400 may be connected to the controller 500 so as to be able to communicate with it by wire or wirelessly. Specifically, the sensor 400 measuring the temperature of the material to be welded may transmit a temperature measurement value including information on the temperature of the surface of the material to be welded to the controller 500 (refer to FIG. 6 ). For example, the sensor 400 may measure the temperature of the surface of the material to be welded at regular intervals and transmit the temperature measurement value to the controller 500 . In this case, the measurement period of the sensor 400 may be set by the user.

In addition, although not shown, the induction welding apparatus 1 according to an embodiment of the present invention may further include a display (not shown) for receiving the temperature measurement value from the sensor 400 and displaying the measured temperature. there is. In this case, the user sees the temperature displayed on the display and, when the surface temperature is high, manually controls the pump (not shown) to increase the supply amount per unit time of the cooling fluid supplied to the cooling passage 130 . . When the supply amount of the cooling fluid per unit time is increased, the flow rate at which the cooling fluid is supplied to the cooling passage 130 may be increased to increase cooling efficiency.

In addition, as the temperature difference between the cooling fluid and the housing 110 increases, the efficiency of the cooling fluid cooling the housing 110 increases. However, when the supply amount of the cooling fluid per unit time is increased, the speed at which the cooling fluid passes through the cooling passage 130 increases. For this reason, the low-temperature cooling fluid from the tank 330 is supplied to the cooling passage 130 more quickly, and the cooling fluid whose temperature has risen through the cooling passage 130 is discharged from the cooling passage 130 more quickly. As a result, the temperature difference between the cooling fluid passing through the cooling passage 130 and the housing 110 is increased, so that the cooling efficiency is increased.

6 is a block diagram of an induction welding apparatus according to an embodiment of the present invention. As shown in FIG. 6 , the induction welding apparatus 1 according to an embodiment of the present invention may further include a control unit 500 .

The control unit 500 may be a control device for controlling the induced current generating unit 200 , the pressing unit 100 , and/or the fluid supply unit 300 .

For example, the control unit 500 may be configured to control the power supply unit 220 according to a user's input to control the frequency of alternating current and/or the voltage of alternating current applied from the power supply unit 220 to the coil 210. can

Also, the controller 500 may be provided to control the actuator 120 according to a user's input. Specifically, the control unit 500 may be provided to control the actuator 120 according to a user's input to elevate the housing 110 .

In addition, the control unit 500 may be configured to control a pump (not shown) of the fluid supply unit 300 according to a user's input to adjust the supply amount of the cooling fluid per unit time.

Also, the controller 500 may receive a temperature measurement value from the sensor 400 at regular intervals. The control unit 500 receiving the temperature measurement value monitors whether the temperature of the material to be welded rises above a set temperature based on the temperature measurement value. In this case, the set temperature may be set by the user. For example, the set temperature may be set in a range between 10 degrees Celsius and 30 degrees Celsius.

When the temperature of the material to be welded rises above the set temperature, the controller 500 may control the pump to increase the supply amount per unit time of the cooling fluid supplied to the cooling passage 130 . Specifically, the control unit 500 transmits a control signal to a pump (not shown) when the temperature of the material to be welded rises above a set temperature while monitoring the temperature of the material to be welded. Upon receiving the control signal, the pump is driven to increase the supply amount per unit time of the cooling fluid supplied to the cooling passage 130 .

7 is a view schematically showing an induction welding apparatus according to another embodiment of the present invention. For convenience of description, parts similar to those of the above-described embodiment use the same reference numerals, and descriptions of parts common to the above-described embodiment will be omitted.

As shown in Figure 7, the pressing unit 2100 of the induction welding apparatus 2 according to another embodiment of the present invention, unlike the above-described embodiment, does not include the actuator 120, the housing 2110, It includes a coupling member 2122 and a fastening hole (2124).

In addition, in the operation stage 3 of the induction welding apparatus 2 according to another embodiment of the present invention, the insertion hole 2126 is formed unlike the above-described embodiment.

The coupling member 2122 may be a fastener inserted into the insertion hole 2126 formed in the work stage 3 through the fastening hole 2124 formed in the housing 2110 .

A screw thread may be formed in the coupling member 2122 to maintain a state coupled to the fastening hole 2124 and/or the insertion hole 2126 . For example, the screw thread may be formed so that when the coupling member 2122 rotates in one direction, the coupling member 2122 moves in the direction of the work stage 3 .

The housing 2100 may be provided similarly to the housing 100 of the above-described embodiment. Therefore, descriptions overlapped with the above-described embodiment will be omitted and the differences will be mainly described. As shown in FIG. 7 , a fastening hole 2124 may be formed in the housing 2100 unlike the housing 100 of the induction welding apparatus 1 according to an embodiment of the present invention.

The fastening hole 2124 is formed at one end of the housing 2110 and may be a hole through which the coupling member 2122 is fastened. For example, the diameter of the fastening hole 2124 may be the same as or somewhat larger than the diameter of the coupling member 2122 . In addition, a screw thread engaged with the screw thread of the coupling member 2122 may be formed in the fastening hole 2124 .

The insertion hole 2126 is formed in the work stage 3 and may be a hole to which the coupling member 2122 is fastened. For example, the diameter of the insertion hole 2126 may be the same as or somewhat larger than the diameter of the coupling member 2122 . In addition, a screw thread engaged with the screw thread of the coupling member 2122 may be formed inside the insertion hole 2126 .

A method of pressing a material to be welded using the induction welding apparatus 2 according to another embodiment of the present invention is as follows.

The user inserts the coupling member 2122 into the fastening hole 2124, and rotates the coupling member 2122 in one direction. When the user continues to rotate the coupling member 2122, at a certain moment, the head portion of the coupling member 2122 comes into contact with one surface of the housing 2110, and the thread portion of the coupling member 2122 is inserted into the insertion hole 2126. It is in a state of being (refer to FIG. 7).

In the same or similar state as in FIG. 7 , if the user continues to rotate the coupling member 2122 in one direction, the housing 2110 is moved in the direction of the work stage 3 like the coupling member 2122 . That is, as the coupling member 2122 is tightened, the housing 2110 descends in the direction of the work stage 3 . At this time, the material to be welded is in contact with the pressure layer 140 and is pressed in the direction of the work stage 3 by the downward force of the housing 2110 .

Other components of the induction welding apparatus 2 according to another embodiment of the present invention other than the configuration difference of the pressing unit 2100 described above are the same as the components of the induction welding apparatus 1 according to an embodiment of the present invention, or It may be provided similarly.

In the above-described embodiments, the method of pressing the material to be welded through the housing 110 connected to the actuator 120 or the housing 2110 in which the fastening hole 2124 is formed, the work stage 3 in which the insertion hole 2126 is formed and a method of pressing the material to be welded through the coupling member 2122 as an example, but the pressing method is not limited thereto. That is, the induction welding apparatus according to an embodiment or another embodiment of the present invention may adopt various methods for maintaining the contact of the materials to be welded.

In the case of induction welding apparatuses 1 and 2 according to an embodiment or another embodiment of the present invention, the coil 210 is disposed inside the housings 110 and 2100, and on the lower surfaces of the housings 110 and 2100. The common point is that the material to be welded is pressed using the attached pressure layer 140 .

Therefore, the user using the induction welding apparatus 1 or the induction welding apparatus 2 according to another embodiment according to an embodiment of the present invention prepares a separate pressing member to maintain the contact state of the materials to be welded do not need to. That is, the user places the induction welding apparatus 1 according to an embodiment of the present invention or the induction welding apparatus 2 according to another embodiment on the material to be welded (the second layer, see FIG. 1 or FIG. 7 ). The coil 210 may be positioned on the welding site, and the pressure layer 140 may be in contact with the back surface of the material to be welded (the second layer, see FIG. 1 or FIG. 7 ). In this state, the user uses the actuator 120 or the coupling member 2122 according to the above description to work the material to be welded in contact with the pressure layer 140 (the second layer, see FIG. 1 or FIG. 7 ). It is possible to press in the direction of the material to be welded (first layer, see Fig. 1 or Fig. 7) arranged on the stage 3 .

On the other hand, in the case of the induction welding apparatus 1 according to an embodiment of the present invention or the induction welding apparatus 2 according to another embodiment of the present invention, the housings 110 and 2110 are lowered, and the pressurized layer 140 is a material to be welded ( The second layer (refer to FIG. 1 or FIG. 7) is in surface contact, and through this, the surface of the material to be welded (the second layer, see FIG. 1 or 7) is pressed in the direction of the work stage (3). At this time, each part of the surface of the material to be welded (the second layer, refer to FIG. 1 or FIG. 7) that is pressed in contact with the pressing layer 140 is pressed in the same or similar direction with the same or similar magnitude of force, It can be prevented that the load is concentrated and the material to be welded is bent or broken.

Hereinafter, operations of the induction welding apparatuses 1 and 2 according to embodiments of the present invention will be described based on the configuration of the induction welding apparatuses 1 and 2 according to the above-described embodiments of the present invention.

First, the user sequentially arranges two materials to be welded on the work stage 3 as shown in FIG. 1 or FIG. 7 . At this time, a material to be welded that is disposed so that one surface is in contact with the work stage 3 and is supported by the work stage 3 is referred to as a first layer 4 . In addition, the material to be welded disposed on the rear surface of the first layer 4 and having one surface in contact with the rear surface of the first layer 4 is referred to as the second layer 5 . At this time, the user arranges the first layer 4 and the second layer 5 so that the parts to be welded are in contact with each other.

When the user uses the induction welding apparatus 1 according to an embodiment of the present invention, the user who arranges the first layer 4 and the second layer 5 uses the induction welding apparatus 1 as the second layer ( 5) Place it on top. Specifically, the user arranges the induction welding device (1) on the second layer (5) so that the induction welding device (1) is located above the welding site.

Thereafter, the user controls the actuator 120 through the control unit 500 to lower the housing 110 . If the user continues to descend the housing 110 after the housing 110 descends and the pressure layer 140 comes into contact with the back surface of the second layer 5, the second layer 5 moves toward the first layer 4 is pressurized to

When the second layer 5 is pressed and the one surface of the second layer 5 and the rear surface of the first layer 4 come into contact with each other, the user stops lowering the housing 110 and the housing 110 is lowered. to keep In this state, the second layer 5 is pressed by the housing 110 and the first layer 4 is supported by the working stage 3, so that the first and second layers 4 and 5 are to be welded. The parts remain in contact.

Alternatively, when the user uses the induction welding apparatus 2 according to another embodiment of the present invention, the user places the housing 2110 on the second layer 5 and then attaches the coupling member 2122 to the fastening hole ( After matching with the hole of 2124), the coupling member 2122 is rotated in one direction.

The user rotates the coupling member 2122 in one direction until the first layer 4 and the second layer 5 contact each other. When the second layer 5 is pressed by the housing 110 so that one surface of the second layer 5 and the back surface of the first layer 4 come into contact, the user stops tightening the coupling member 2122 . In this state, the housing 2110 is fastened to the coupling member 2122 to maintain a lowered state, thereby maintaining a contact state between the first layer 4 and the second layer 5 .

As shown in FIG. 2 , a user who presses the second layer 5 to contact the welding site applies power to the coil 210 using the power supply unit 220 and applies power to the first layer 4 and the second layer. An eddy current C is induced in at least one of the two layers 5 . At this time, the user may control the power supply unit 220 through the control unit 500 to adjust the frequency of the alternating current to set the penetration depth of the eddy current (C). At least one of the first layer 4 and the second layer 5 is heated and melted by the induced eddy current C to bond the first layer 4 and the second layer 5 .

The user may manually control the fluid supply unit 300 or control the pump through the control unit 500 while pressurizing the second layer 5 to supply the cooling fluid to the cooling passage 130 . Accordingly, as the cooling fluid flows through the cooling passage 130 , the temperature of the housings 110 and 2100 is lowered. In addition, the temperature of the pressure layer 140 in contact with the housings 110 and 2100 through heat exchange with the housings 110 and 2100 is lowered. In addition, since the pressure layer 140 and the second layer 5 are in contact with each other, heat exchange occurs between them, and the surface temperature of the second layer 5 is lowered.

That is, when using the induction welding apparatus 1 and 2 according to the embodiments of the present invention, the cooling flow path 130 is formed inside the housings 110 and 2100, so the housings 110 and 2100 or the pressure layer 140 . The pressurization of the second layer 5 by the and cooling of the second layer 5 by the cooling fluid may be performed at the same time.

Due to the temperature drop on the surface side of the second layer 5, the contact portion between the first layer 4 and the second layer 5 is heated and melted, but the surface side of the second layer 5 is not melted. Preferably, the surface side temperature of the second layer 5 may be maintained close to room temperature.

In order to prevent the temperature of the second layer 5 from rising above the set temperature, when the temperature measured by the sensor 400 rises, the user manually controls the pump to increase the supply amount of the cooling fluid per unit time.

Alternatively, the user may set the limit increase temperature in advance through the control unit 500 . In this case, when the surface temperature of the second layer 5 measured by the sensor 400 is equal to or greater than the limit increase temperature, the controller 500 controls the pump as described above to increase the supply amount of the cooling fluid per unit time.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1, 2: Induction welding device 3: Working stage
4: first layer 5: second layer
100, 2100: pressing part 110, 2100: housing
120: actuator 130: cooling flow path
140: pressurized layer 200: induced current generation unit
210: coil 220: power supply
300: fluid supply 310: supply pipe
320: drain pipe 330: tank
400: sensor 500: control unit
2122: coupling member 2124: fastening hole
2126: insertion hole C: eddy current

Claims (8)

An induction welding apparatus for welding a first layer disposed on a work stage and a second layer disposed on the first layer and having at least a portion of one surface in contact with the first layer based on an induced current,
The first layer is in contact with the back surface of the second layer in a state supported by the work stage, and the second layer is pressed in the direction of the first layer to maintain contact between the first layer and the second layer and a pressing unit including a cooling passage through which a cooling fluid flows to lower the temperature of the second layer while in contact with the back surface of the second layer;
an induced current generator for inducing an eddy current to flow in at least one of the first layer and the second layer;
a fluid supply unit supplying the cooling fluid to the cooling passage;
a sensor for measuring the temperature of the second layer; and
A control unit that receives the temperature measurement value from the sensor to monitor the temperature of the second layer, and controls the fluid supply unit to increase the supply amount per unit time of the cooling fluid when the temperature of the second layer rises above a set temperature ; Containing, induction welding device. According to claim 1,
The induced current generator includes a coil electrically connected to a power source to induce the eddy current,
The pressing unit, the coil is disposed therein, the induction welding apparatus comprising a housing that is provided to be lifted with respect to the rear surface of the second layer and pressurizes the rear surface of the second layer in a lowered state. 3. The method of claim 2,
The housing is
The induction welding apparatus is formed to be able to move up and down relatively with respect to the coil so that a relative distance between the one surface of the first layer and the coil is maintained even when the housing is lifted. 3. The method of claim 2,
The housing is
At least a portion of the induction welding device is provided with an insulating material that passes the magnetic field formed by the coil. delete delete According to claim 1,
The pressurizing part,
In a state in which the pressing part presses the second layer, at least a portion of the pressure layer is in contact with the second layer and elastically deformed according to the shape of the surface of the second layer, the induction welding apparatus comprising a pressure layer. 8. The method of claim 7,
A sensor disposed on the pressure layer to measure the temperature of the back surface of the second layer in a state where the pressure unit presses the second layer; further comprising, an induction welding apparatus.

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