KR102189504B1 - Vibration welding apparatus by high frequency induction - Google Patents

Abstract

The present invention relates to a high-frequency induction vibration welding device using an electromagnet principle and, more specifically, to a high-frequency induction vibration welding device in which noise generated compared to noise generated during ultrasonic welding is reduced. The high-frequency induction vibration welding device comprises: upper and lower fixed blocks provided with an inner space and fixed while being spaced apart from each other; upper and lower cores inserted into the inner spaces of each of the upper and lower fixed blocks so as to move in a linear direction and converted into electromagnets when power is supplied with a coil wound around a part; and a vibration member disposed between the upper and lower fixed blocks, installed so as to be separated by a predetermined distance from a lower surface of the upper core and an upper surface of the lower core among the upper and lower cores, and generates vibration by collision of the upper and lower cores due to the control of power supply to the coils of the upper and lower cores.

Description

High frequency induction vibration welding device {VIBRATION WELDING APPARATUS BY HIGH FREQUENCY INDUCTION}

The present invention relates to a high-frequency induction vibration welding device, and more specifically to a high-frequency induction vibration welding device using the principle of an electromagnet.

In general, ultrasonic vibration is used to convert AC 220V power into electric energy in KHZ through a power supply in a welding method by frictional heating effect due to collision on the surface of the bonding surface, and this is converted into electrical energy in KHZ units again through a converter. A technique is known to change the amplitude to vibration energy and then adjust the amplitude with a booster.

However, such conventional welding technology is limited in shape, material, size, weight, etc. due to the shape of the instrument horn and the change in frequency characteristics due to heat generation by applying the maximum transmitted energy at the resonance frequency to the welding. There was a problem with a limit on the output load. In addition, there was a difficulty in welding the release material due to vibrational frictional heat generation of other characteristics.

Another welding technique is a welding method that applies vibration friction to the surface of the joint surface using low-frequency vibration and pressurizes it. Converts it into high-frequency electrical energy in units of 180Hz ~ 240Hz through a power supply, and changes the mechanical vibration energy through an electromagnet. Along with this, a technique of applying vibration and friction to the left and right with an amplitude of 0.5 ~ 2mm is known. This welding technology is a technology that melts and spreads and welds plastic while pressing by giving left and right vibration friction, and is mainly applied to plastic products that require internal pressure and high strength.

However, this conventional welding technology has a larger output than the ultrasonic vibration method, but by using high vibration, it affects external machinery due to vibration noise, the volume of the vibration mechanism is large, and the spring life limit and the spring round trip time are mechanically limited. Since it is received, it is difficult to operate at high frequency, the welding time is long, and there is a problem of noise generation.

Japanese Patent Publication 2019-147348

According to the present invention, it is intended to provide a high-frequency induction vibration welding device capable of vibration welding by controlling power supply to generate vibration to a vibration member using the principle of an electromagnet.

A high-frequency induction vibration welding device according to an aspect of the present invention includes: an upper and lower fixing block provided with an inner space and fixed in a spaced apart state; Upper and lower cores inserted so as to move in a linear direction in the inner space of each of the upper and lower fixed blocks, and converted into an electromagnet when power is supplied with a coil wound around a portion; And disposed between the upper and lower fixed blocks, and installed so as to be separated by a predetermined distance from the upper and lower cores of the upper and lower cores, respectively, so that the upper and lower cores are controlled to supply power to the coils of the upper and lower cores. It may include; a vibration member for generating vibration by collision.

In this case, the upper and lower cores may be formed in an E-shaped or U-shaped.

In this case, the upper and lower cores may be formed so that the coil is wound around the protruding portion in the center when the upper and lower core has an E shape, and when the upper and lower core is formed in the U shape, the coil may be wound around any one of the protruding portions.

At this time, the vibration member may be formed of iron or magnetic material.

In this case, the separation distance between the upper and lower cores and the vibration member may be 0.01-5mm.

In this case, DC power is alternately applied to the upper and lower coils of the upper and lower cores, but when power is turned on to the upper coil, the lower coil is turned off, and conversely, when the power to the lower coil is turned on, the upper coil may be controlled to be turned off.

In this case, the frequency of use of the DC power may be 15-20 KHz, and the voltage may be 24-220V.

In this case, the vibration member may include a plurality of magnetic materials.

In this case, the upper and lower cores are formed in an E-shape, and magnetic bodies disposed at positions corresponding to the central and both ends of the three ends of the upper and lower cores may be disposed to form opposite polarities in the vertical direction.

In this case, each of the plurality of magnetic bodies constituting the vibrating member may have both ends fixed to a support member of the nonmagnetic substance, and the support member may operate as a vibration plate.

In this case, DC power supplied to the coils of the upper and lower cores may be supplied to form opposite polarities.

According to the above configuration, the high frequency induction vibration welding device according to the present invention can provide a considerably high frequency band by installing a vibration plate between two electromagnets and controlling power supply, and reducing noise generated compared to ultrasonic welding. Provides an effect.

1 is a configuration diagram showing an example of use of a high-frequency induction vibration welding device according to an embodiment of the present invention.
2 is a perspective view of a high-frequency induction vibration welding device according to an embodiment of the present invention.
3 is an exploded perspective view of a high frequency induction vibration welding device according to an embodiment of the present invention.
4 is a cross-sectional view of a high-frequency induction vibration welding device according to an embodiment of the present invention.
5 is a front view of a core, which is a component of a high frequency induction vibration welding device according to another embodiment of the present invention.
6 and 7 are cross-sectional views for explaining the operation of the high-frequency induction vibration welding device according to another embodiment of the present invention.
8 and 11 are graphs illustrating examples of a resonance circuit diagram that can be provided in a high frequency flow vibration welding apparatus according to an embodiment of the present invention and a frequency variable and pulse width variable control method.

Words and terms used in the present specification and claims are not limited to a conventional or dictionary meaning, and in accordance with the principle that the inventors can define terms and concepts in order to describe their invention in the best way It should be interpreted as a meaning and concept consistent with the technical idea.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings correspond to a preferred embodiment of the present invention, and do not represent all the technical ideas of the present invention. There may be equivalents and variations.

In the present specification, terms such as "comprise" or "have" are intended to describe the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility.

That an element is "front", "rear", "top" or "bottom" of another component means that it is in direct contact with the other component and is "front", "rear", "top" or "unless otherwise specified" It includes not only being disposed below, but also another component disposed in the middle. Also, the fact that a component is "connected" with another component includes not only direct connection to each other, but also indirect connection to each other, unless otherwise specified.

Hereinafter, a high-frequency induction vibration welding device 1 according to the present invention will be described with reference to the drawings.

A high-frequency induction vibration welding device 1 according to an embodiment of the present invention is schematically illustrated with reference to FIG. 1. The high-frequency vibration generated from the lower part is transmitted to the vibration horn 2, and a pattern is formed on the product as a plurality of nonwoven fabric films pass through the fusion portion between the end of the vibration horn 2 and the pattern roll 3. That is, a plurality of films are stacked while passing between the guide rolls 4 on the right side, and a pattern is formed while passing through the fusion portion, and the work is performed in such a manner that they are fused and discharged through the guide roll 5.

In this case, the vibration provided to the fusion part is provided by colliding the electromagnet with the vibration member using the electromagnet principle as described below.

The high-frequency induction vibration welding apparatus 1 according to an embodiment of the present invention includes an upper and lower fixing block 10, an upper and lower core 20, and a vibration member 40, referring to FIGS. 2 to 4.

The upper and lower fixing blocks 10 are fixed in a state spaced apart from each other with internal spaces 11a and 12a provided with reference to FIGS. 2 to 4.

In this case, the upper and lower fixing blocks 10 are composed of an upper fixing block 11 and a lower fixing block 12, and are configured to be spaced apart by a thickness of the vibration member 40.

In this case, the upper fixing block 11 has an inner space 11a open in a downward direction, and the lower fixing block 12 has an internal space 12a open in an upward direction. Of course, the upper and lower cores 20 may be inserted into the inner spaces 11a and 12a so as to be reciprocated in a linear direction along the upper and lower directions, and assembled.

In this case, the upper and lower fixing blocks 10 may be made of a non-magnetic material so as not to interfere with the operation because the upper and lower cores 20 operate as an electromagnet.

In this case, the upper and lower fixing blocks 10 are shown in the form of a rectangular parallelepiped, but of course it is not limited thereto. However, the inner spaces 11a and 12a should be formed to perform linear motion.

At this time, the upper and lower fixing blocks 10 serve as a case and a frame.

The upper and lower cores 20 may include an upper core 21 and a lower core 22 with reference to FIGS. 2 to 4.

At this time, when power is supplied to the upper and lower fixing blocks 20 so as to be moved in a linear direction and wound around a part of the inner spaces 11a and 12a of each of the upper and lower fixing blocks 20, it may be converted into an electromagnet.

In this case, the upper and lower cores 20 may be formed in an E-shape or a C-shape. 2 to 4 show that the E-shape is applied, and in FIG. 5, the C-shape is shown.

At this time, the upper and lower cores 20 are formed so that the coil is wound around the central protruding portions 21a and 22a in the case of the E-shape, and any one protruding portion 22a′ in the case of the U-shaped The coil 30 may be formed to be wound on. When winding the coil 30 around the core 20, a non-conductive film 31 is inserted in the middle.

At this time, the upper and lower cores 20 become electromagnets when power is supplied in the case of the E-shaped, and the portions 21a and 22a wound around the coil 30 and the ends 31b and 22b have different polarities, and In the case of a shape, both ends 22a' and 22b' have different polarities.

At this time, the upper and lower cores 20 may be applied with a ferrite core, an iron core (silicon steel plate) core, or the like.

2 to 4, the vibration member 40 is disposed between the upper and lower fixing blocks 10, and the lower surface and the lower core 22 of the upper core 21 of the upper and lower cores 20 The upper and lower cores 20 are installed so as to be separated by a predetermined distance from the upper surface of the upper and lower cores 20, and as power is supplied to the coils 30 of the upper and lower cores 20, the upper and lower cores 20 collide, thereby generating vibration.

At this time, the vibration member 40 may be formed of iron or magnetic material. Iron material is applied here.

In this case, a separation distance (d) between the upper and lower cores 20 and the vibration member 40 may be 0.01-5mm. Here, the separation distance (d) is 0.2mm. The vertical vibration width may be 0.01-0.2mm.

At this time, both ends of the vibration member 40 are fixed by the upper and lower fixing blocks 10, and the middle part is spaced apart from the upper and lower cores 20 by 0.2 mm. Accordingly, when power is supplied to the upper and lower cores 20, magnetic force of the core is generated, and the upper and lower cores 20 strike the vibration member 40 by magnetic force against the vibration member 40. Therefore, the power must be controlled so that the upper and lower cores 20 alternately collide with the vibration member 40. Such electrical control is presented in a circuit diagram and a frequency variable and pulse width variable control method in FIGS. 8 to 11.

At this time, DC power is alternately applied to the upper and lower coils 30 of the upper and lower cores 20, but when the power to the upper coil 30 is turned on, the lower coil 30 is turned off, and conversely, power to the lower coil 30 When turned on, the upper coil 30 may be controlled to be turned off.

In this case, the frequency of use of the DC power may be 15-20 KHz, and the voltage may be 24-220V.

In this case, when the AC AC frequency is applied, overheating may occur due to high frequency induction heating characteristics due to iron loss. In order to solve this problem, it will be possible to solve this problem by installing a fan outside the device to cool it.

At this time, the vibration of the vibration member 40 will be transmitted by the vibration transmission member 41.

At this time, the vibration transmission member 40, referring to FIG. 3, a first member 41a connected to extend horizontally to both ends of the vibration member 40, and in a vertical direction from the first member 41a. It may include an extended second member 41b, a third member 41c extending horizontally inward, and a fourth member 41d protruding upwardly from the third member 41c.

Accordingly, the vibration of the vibrating member 40 will be connected to the vibrating horn or the like through the first member 41a to the fourth member 41d. Of course, the first member 41a extends so as not to contact other components such as the fixing block 10 so that vibrations are not transmitted to other places except for the connection part with the vibration member 40.

Meanwhile, referring to FIGS. 6 and 7, a welding device according to another embodiment of the present invention is shown. In this embodiment, there is a difference in the vibration member.

Here, the vibration member 140 includes a plurality of magnetic bodies 141, 142, and 143. The upper and lower cores 21 and 22 are formed in an E-shape, and are vibrating members 140 disposed at positions corresponding to the central portions 21a and 22a and both ends of the three ends of the upper and lower cores 21 and 22. The magnetic material may be arranged to have opposite polarities in the vertical direction.

At this time, the plurality of magnetic bodies 141, 142, and 143 constituting the vibration member 140 are fixed to a support member formed of synthetic resin in which both ends are non-magnetic, and the support member will operate as a vibration plate.

At this time, the three magnetic bodies 141, 142, 143 constituting the vibration member 140 are separated from each other by a separating plate 144, which is a nonmagnetic material, and are structurally connected to each other so that they can be supported. State.

At this time, the DC power supplied to the coils 30 of the upper and lower cores 21 and 22 are supplied to form opposite polarities. That is, the magnetic polarity of the upper and lower cores 21 and 22 is changed according to the DC power direction of the coil, and the magnetic force is used to repeatedly push and pull the vibration member 140, which is the magnetic body 141, 142, and 143. Therefore, in FIG. 6, the force is received in the direction to rise, and on the contrary, when DC power is supplied, the vibrating member 140, which is the magnetic body 141, 142, 143, receives the force in the downward direction, as shown in FIG. By repeating the same method, the magnetic vibration member 140 vibrates, and the vibration is transmitted to the plastic support member.

Here, in different embodiments, two of the vibration members 40 and 140 are used as the steel plate 40 or the magnetic body 141, 142, 143 is used. In the case of using the steel plate 40, the material As expected, the durability is very strong, and when the magnetic body (141, 142, 143) is used, the durability may be lower than that of the case of applying the steel plate 40, but the amount of impact against the generated vibration is also the magnetic force of the magnetic body. As an added reason, there is a feature that is very operationally efficient.

Meanwhile, in FIGS. 8 to 11, a circuit diagram for electrical control and a frequency variable and pulse width variable control method are presented.

8 shows an example of an AC resonance circuit applicable to the present invention. In the circuit diagram, load 1 and load 2 represent upper and lower cores 21 and 22, respectively. 9 to 11 illustrate an example of an LLC DC/DC resonant circuit, and a diode is provided to prevent generation of a high voltage surge due to back EMF. Here, it is important to control the strength and weakness by PWM (Pulse Width Modulation) control.

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited by the embodiments presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add or change components within the scope of the same spirit. Other embodiments may be easily proposed by deletion, addition, and the like, but it will be said that this is also within the scope of the present invention.

1: welding device
2: tool horn 10: upper and lower fixed blocks
11: upper fixed block 12: lower fixed block
20: upper and lower core 21: upper core
22: lower core 30: coil
40, 140: vibration member 41: vibration transmission member
141-143: magnetic material 144: separator

Claims (11)

Upper and lower fixed blocks provided with an inner space and spaced apart from each other;
Upper and lower cores inserted so as to move in a linear direction in the inner space of each of the upper and lower fixed blocks, and converted into an electromagnet when power is supplied with a coil wound around a portion;
It is disposed between the upper and lower fixed blocks, and is installed so as to be spaced apart from the upper and lower cores of the upper and lower cores by a predetermined distance, and the upper and lower cores collide as power is supplied to the coils of the upper and lower cores. A vibration member from which vibration is generated;
Containing, high frequency induction vibration welding device. The method of claim 1,
The upper and lower cores are made of an E-shaped or C-shaped, high-frequency induction vibration welding device. The method of claim 2,
When the upper and lower cores are formed in an E-shape, the coil is wound around a protruding portion in the center, and when the upper and lower core is formed in a U-shape, the coil is wound around any one of the protruding portions. The method of claim 1,
The vibration member is formed of iron or magnetic material, high frequency induction vibration welding device. The method of claim 1,
A separation distance between the upper and lower cores and the vibration member is 0.1-5mm, a high frequency induction vibration welding device. The method of claim 1,
The upper and lower coils of the upper and lower cores are alternately applied with DC power, but when power is turned on to the upper coil, the lower coil is turned off, and when power is turned on to the lower coil, the upper coil is controlled to be turned off. The method of claim 6,
The frequency of the DC power is 15-20KHz, the voltage is 24-220V, high frequency induction vibration welding device. The method of claim 1,
The vibration member comprises a plurality of magnetic materials, high frequency induction vibration welding device. The method of claim 8,
The upper and lower cores are formed in an E-shape, and magnetic bodies disposed at positions corresponding to the central and both ends of the three ends of the upper and lower cores are arranged to form opposite polarities in the vertical direction. The method of claim 9,
A high frequency induction vibration welding device, wherein each of the plurality of magnetic bodies constituting the vibration member is fixed to a support member of the non-magnetic body, and the support member operates as a vibration plate. The method according to any one of claims 8 to 10,
DC power supplied to the coils of the upper and lower cores are supplied to form opposite polarities to each other.

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