KR102506292B1 - Interchangeable Water Cooled High Frequency Welding Machine - Google Patents

Abstract

An invention for an interchangeable water-cooled high-frequency welding machine is disclosed. The disclosed interchangeable water-cooled high-frequency welding machine enables selective replacement of a ferrite core directly provided for welding of an object to be welded in accordance to the diameter and size of the object to be welded, such as water-cooled coil In the high frequency welding machine, the ferrite core directly provided for welding of the object to be welded can be selectively replaced according to the diameter and size of the object to be welded, such as the water-cooled coil winding part (heating coil). In addition, an insulation and heat-resistant paint of a heating iron core and the water-cooled coil winding part, where high heat is intensively generated, are heat-treated and coated to ensure durability without burnout. The interchangeable water-cooled high-frequency welding machine includes a plurality of iron cores, a coil winding part, a coupler, and an opening and closing valve.

Description

Interchangeable Water Cooled High Frequency Welding Machine}

The present invention relates to a replaceable high-frequency welding machine used for brazing joints of welded objects, which are diamagnetic pipes, to each other to maintain watertightness (or airtightness) by high-frequency induction heating. It relates to a replaceable water-cooled high-frequency welder that allows the ferrite core of the high-frequency welder directly provided for welding to be replaced with one suitable for the diameter and size of the object to be welded.

In general, a high-frequency welding machine generates a high-frequency magnetic field using a high-frequency generator that generates high-frequency electricity based on power supply and high-frequency electricity, thereby generating high-frequency vortex in the workpiece to generate Joule heat for welding. In addition, this heating part is composed of a heating coil and a ferrite core, and is provided to mutually weld diamagnetic copper or aluminum pipes used in refrigerators, air conditioners, outdoor units, etc. Prior art for ' has been published in the patent literature.

First, according to Registration No. 10-0244362 (Patent Document 1), it is called 'dynamic welding heat input control device for high-frequency electric resistance welding used in manufacturing small diameter electric resistance welding', and 'small diameter steel pipe having a diameter of 10 mm or less. It relates to a heat input control device capable of controlling the heat input of an electric resistance welding machine used when manufacturing a steel pipe. In the control device, a heating unit that generates heat necessary for welding in a welding area, a welding control unit that supplies an appropriate amount of electricity required for optimum welding to the heating unit, and heat generated by the heating unit A temperature sensor for measuring the temperature of the welded portion, a camera for photographing the welding area centered on the welded portion, and the temperature sensor measures the temperature of the welded portion to control the welding heat input, and the camera It consists of a control unit that checks the welding state based on the image using an image, and a monitor display that is connected to the control unit and displays an image of a welding part photographed by a camera.'

In addition, according to Patent Registration No. 10-0853454 (Patent Document 2), 'high frequency heating device for copper pipe welding', 'a high frequency oscillator that generates high frequencies, a control box that controls the high frequencies generated by the high frequency oscillator, and a half (半) a coil having a circular portion and divided into left and right portions and fixed to the left and right portions of the body of the coil connection part; A coil connection body that is separated into a left part and a right part, the left part and the right part being divided into upper and lower parts, respectively, and the upper and lower parts being rotatably connected to each other by a hinge; The lower end of the coil connection part body is provided with a fixing groove that is molded when inserted, a fixing device installed on the control box, a connection line that enables the free movement of the coil, and a connection line winding device that stores the connection line that includes'.

However, the 'high frequency welding machine' of the prior art of Patent Documents 1 and 2 has a disadvantage in that it can only weld a to-be-welded object having a specific diameter.

It is a 'high frequency welding device' disclosed in Publication No. 10-2015-0127397 (refer to Patent Document 3) developed to solve this inconvenience.

According to this 'high-frequency welding device', 'it can be used in common according to pipes of various diameters' and 'a high-frequency generating unit that generates high-frequency waves, and a heating coil unit connected to the high-frequency generating unit to heat the outer diameter of the pipe' Including, the heating coil unit includes a first heating coil provided to surround one side of the pipe, a second heating coil provided to surround the other side of the pipe, and the first heating coil and the second heating coil according to the outer diameter of the pipe. It includes a moving unit provided to enable adjustment of the distance between the coils'.

However, the high-frequency welding device disclosed in the prior art (Publication No. 10-2015-0127397) has a specific diameter of the patent documents (1 and 2) in that it can be used in common for pipes of various diameters. Although there is an advantage compared to welding only the object to be welded, this prior art is complicated by the scissor structure in which configurations that widen or narrow according to the diameter size of the circular pipes to be welded are added. There is also a problem of increasing production cost.

Therefore, there is an urgent need for the development of a 'high-frequency welding machine' with a simple configuration that can be manufactured at a low cost while enabling efficient welding of large or small pipe sizes.

KR Patent Registration No. 10-0244362 KR Patent Registration No. 10-0853454 KR Patent Publication No. 10-2015-0127397

The present invention was developed to supplement the above-mentioned problems of the prior art and provide various additional advantages, and the water-cooled coil winding part of the ferrite core of the high-frequency welding machine directly provided to the welding of the object to be welded As such, the purpose is to provide a replaceable water-cooled high-frequency welding machine that can be replaced with one suitable for the diameter size of the welded object to satisfy both versatility and economy.

In addition, an object of the present invention is to provide a replaceable water-cooled high-frequency welding machine in which a heating iron core and a water-cooled coil winding, where high heat is intensively generated, have durability without burnout even at high temperatures.

The above object is achieved by a replaceable water-cooled high-frequency welding machine provided according to the present invention.

The replaceable water-cooled high-frequency welding machine provided according to one aspect of the present invention is arranged face-to-face with a gap in which a welded object can be positioned to form a magnetic path connected by a ring. A plurality of ferrite cores having a predetermined shape to form a flat inclined surface by removing angular corners so that they can be positioned and welded even in a small space of the object to be welded; A groove corresponding to the air gap is formed on the circumference of the iron core and installed in a state of crossing the air gap, so that when the high frequency generator supplies high frequency electricity, it flows to the welded object located in the air gap, generating a vortex due to the high frequency magnetic flux. A coil winding part made of a water-cooled tube that generates heat for brazing the welded part of the object to be welded; and a coupler and an on/off valve respectively installed on the coil winding part, and when the diameter of the object to be welded is smaller or larger than the gap of the iron core, the coupler separates the iron core like the coil winding part to determine the diameter of the object to be welded. When the coil winding part and the iron core are replaced by the coupler, the cooling water flowing through the water-cooled pipe is blocked by the on-off valve to prevent leakage. characterized by

delete

delete

According to the following embodiments of the present invention, the water-cooled high-frequency welding machine has an economical effect that can be used universally corresponding to the diameter of the object to be welded.

The present invention provides the effect of having durability without burnout even when using a heating iron core and coil windings, which are severely burned due to high heat in a water-cooled high-frequency welding machine, even when used for a long time.

1 is a view schematically showing a replaceable water-cooled high-frequency welding machine from the front according to an embodiment of the present invention;
2 is a view schematically showing a replaceable water-cooled high-frequency welding machine of another embodiment of the present invention from the front;
3 is a view showing a separated state of the ferrite core for replacement of the iron core in FIGS. 1 and 2;
4 is a schematic diagram of a wireless lighting circuit for lighting using electricity induced in a coil winding of a water-cooled high-frequency welding machine according to the present invention.

The terms used in the present invention are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator, so the definitions of these terms are meanings consistent with the technical details of the present invention. and should be interpreted as a concept.

In addition, the embodiments of the present invention do not limit the scope of the present invention, but are only illustrative of the components presented in the claims of the present invention, are included in the technical idea throughout the specification of the present invention, and constitute the claims. It is an embodiment that includes elements that can be replaced as equivalents in elements.

In addition, optional terms in the following embodiments are used to distinguish one element from other elements, and elements are not limited by the terms.

Hereinafter, a replaceable water-cooled high-frequency welding machine according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing a replaceable water-cooled high-frequency welding machine according to an embodiment of the present invention from the front.

As shown in the drawing, the replaceable water-cooled high-frequency welding machine 100 according to the present invention is a combination of a welded object 10 in a state in which copper or aluminum tubes, which are diamagnetic, for brazing by arranging two facing each other It includes ferrite cores 110a and 110b of a predetermined shape forming a magnetic path while forming a disconnected gap 111 enabling the positioning of the site.

The iron cores 110a and 110b, which form a magnetic path through which the high-frequency magnetic flux flows, protrude from the lower side of the pole bodies 112a and 112b and the pole bodies 112a and 112b, which are vertically symmetrical as seen in the drawing. It includes magnetic path connection parts 114a and 114b installed to form a magnetic path and a magnetic path tube (Ring) 116 connecting the magnetic path connection parts 114a and 114b to form a continuous magnetic path without interruption. In order to position and weld the ferrite cores 110a and 110b even in a small space, as seen in the drawing, the angular corners on both sides of the upper and lower sides of the iron cores 110a and 110b are removed to make the flat inclined surface ( 118a, 118b) were achieved. In this case, it is important to remove the area of the ferrite core to maintain the same area as possible. The reason is that the magnetic flux of the iron core is not reduced.

As shown in the drawing, the tubular welded object 10 made of diamagnetic material to be positioned in the air gap 111 formed by magnetic breakage of the iron cores 110a and 110b is in the form of surrounding the iron cores 110a and 110b. Alternatively, it is possible to weld the joint of the object to be welded 10 by the heating action of the coil winding portion 120 formed by winding an aluminum tube in a coil shape. That is, the coil winding part 120 is formed by winding a copper or aluminum tube into a coil shape, and forms grooves 121 corresponding to the gaps 111 of the iron cores 110a and 110b while forming the gaps 111. It is installed in a state of winding the iron cores 110a and 110b in a state of crossing, and when power is supplied from the commercial power supply unit 20 to the high frequency generator 130 to be described later through the rectifier 30, the high frequency generator 130 When the high frequency electricity generated from ) flows along the coil winding part 120, the high frequency magnetic flux generated from the coil winding part 120 flows along a magnetic path formed by the iron cores 112a and 112b.

Therefore, when a copper or aluminum pipe, which is the object to be welded 10, is placed in the gap 111, high-frequency magnetic flux flows through the diamagnetic pipe to generate high-frequency vortexes to generate heat for brazing the connection between the objects to be welded.

The coil winding part 120 is composed of a hollow tube made of copper or aluminum, and cools the high heat generated by the high frequency in the coil winding part 120 by allowing the cooling water to flow into the inside. It is a water-cooled structure that allows

As shown in the drawing, while forming the coil winding part 120 with respect to the iron core 110, a high frequency generator 130 is provided in the water-cooled tubes 122a and 122b extending from the coil winding part 120. . The high frequency generator 130 is supplied with electricity from the commercial power supply unit 20 through the rectifier 30. When the high frequency generator 130 receives power, it generates high frequency electricity and 122b) to flow toward the coil winding part 120. The high frequency generator 130 forms a housing 132 and is installed in a state of protecting the water-cooled tubes 122a and 122b extending from the coil winding unit 120 from the outside, and also inside the housing 132. In the furnace, a PCB 134 or the like for generating high-frequency electricity is installed, and since this configuration is a conventional technique, a separate detailed description thereof will be omitted.

As shown in the drawing, separation and coupling means 140a and 140b are watertightly installed at positions spaced apart from the high frequency generator 130 of the water-cooled tubes 122a and 122b so as to be separated and coupled, and the welded object ( When the diameter of 10) is not the same diameter (d) as the void 111 of the iron cores 110a and 110b, but a small diameter (d') (see FIG. 2), like the coil winding part 120, the iron core ( 110a and 110b) are separated and replaced with an iron core (see FIG. 3) having an air gap 111 of a size suitable for each diameter (d or d') of the object to be welded 10 so that it can be combined. Coupling means (140a, 140b) is a coupler that allows watertight coupling or separation between the tubes.

As shown in the drawing, opening/closing valves 150a and 150b for opening and closing the ducts of the water-cooling pipes 122a and 122b are installed at positions adjacent to the separation coupling means 140a and 140b of the water-cooling pipes 122a and 122b. did The opening/closing valves 150a and 150b opening and closing the water-cooled tubes 122a and 122b are used when the iron cores 110a and 110b are replaced like the coil winding part 120 by the separation and coupling means 140a and 140b. This is to prevent water leakage by temporarily closing the cooling water flowing through the water-cooled pipes 122a and 122b.

2 is a view schematically showing a replaceable high-frequency welding machine of another embodiment of the present invention from the front, and the same parts as the above embodiment are denoted by the same reference numerals to avoid redundant description.

As shown in the drawing, in the interchangeable high-frequency welding machine 100a according to the present embodiment, the welded object 10' to be welded has a small diameter d', so that the gap 111' of the iron cores 110a and 110b is also welded. (10') only that it is composed of the air gap 111' corresponding to the small diameter (d') of the embodiment is different from the replaceable high-frequency welding machine 100, other configurations are the same, so no separate description is given. omit

An example of the operation of the replaceable high frequency welders having the above configuration will be described with reference to FIG. 3 .

3 is a view showing a separated state of the iron core part for replacement of the iron core part in FIGS. 1 and 2 .

As shown in the drawing, the interchangeable high-frequency welding machine (100 or 100a) according to the present invention has a gap (111 or The iron cores 110a and 110b having 111' have the convenience of being interchangeable like the coil winding part 120.

For example, when the diameter (d) of the object to be welded 10 is smaller than the diameter (d') of the gap 111 of the iron cores 110a and 110b in the high-frequency welding machine, the existing gap 111 is provided. The iron cores 110a and 110b to be welded can be replaced with iron cores 110a and 110b having a gap 111' that fits the diameter d' of the object to be welded 10'.

The replacement work first unscrews the coupler, which is the separation coupling means (140a, 140b), separates the iron core (110a, 110b) from the high frequency generator 130 like the coil winding part 120, and then the diameter of the object to be welded 10' The water-cooled tube portion of the coil winding part 120 of the iron cores 110a and 110b having the air gap 111' suitable for (d') may be water-tightly coupled again through the coupler. While separating or combining the coupler, the coil In order to prevent leakage of the cooling water flowing through the water-cooled tube constituting the winding part 120, the valves 150a and 150b can be operated in an off state to block them, and conversely, after coupling, the blocked position can be switched to an open position.

Contrary to the above, when the small diameter (d') of the object to be welded (10') is the large diameter (d), in contrast to the above, if the iron core (110a, 110b) having a gap (1110) corresponding to the large diameter (d) is replaced, However, the replacement method is the same as the above, and there is an advantage that it can be used universally in response to the large and small diameters of the welded object.

In addition, when connecting the outdoor and indoor units of the air conditioner, pipes for refrigerant gas in and out are installed side by side, but the space between the pipes is quite narrow.

Because of this, when a problem occurs in the pipe and brazing of the pipe in question occurs, it is difficult to weld because the corner part is caught when inputting into a narrow space with the existing ferrite core having an angled corner.

According to the present invention, by removing the angular corners of the body parts 112a and 112b of the iron core, the flat inclined surface parts 118a and 118b allow easy entry into narrow spaces between pipes, so that welding can be performed. give a benefit

In addition, an insulating and heat-resistant film having a predetermined thickness is formed on the entire surface of the iron cores 110a and 110b and the coil winding part 120 using an insulating and heat-resistant paint to prevent burnout due to high heat. did

For example, electricity of about 300 Vacp 100 Khz is applied to the high-frequency output side according to the present invention, but if it is shorted with a conductor, a large current flows and there is a risk of damaging parts such as semiconductors. In addition, if the iron core on which the coil winding part composed of copper pipe is wound is wrong, there is a fear that a layer short may occur due to the object to be welded.

In order to prevent this, the iron cores 110a and 110b where high heat is generated and the entire surface of the coil winding part 120 are coated with fluorine resin (trade name: Teflon), which is an insulating and heat-resistant paint, and then heat-treated to insulate and It is preferable to form a heat-resistant film (Coating).

The reason for forming the insulating and heat-resistant coating is that ferrite core, which is a ferromagnetic material used as a path through which magnetic flux passes, has many glass properties and is easy to break. In particular, during welding, the object to be welded becomes in contact with the iron core at a high temperature of 1000° C. or more, and there is a risk that the ferrite core may be broken due to the temperature difference. In order to compensate for this, heat treatment is performed by coating with fluororesin (Teflon) having good heat resistance and adhesion in order to remain in place even if it is broken.

4 is a circuit configuration diagram of a lighting unit installed in a coil winding of a high-frequency welding machine.

As shown in the drawing, in this embodiment, the lighting means 160 is installed in the heating coil 120 of the high-frequency welding machine, and when high-frequency electricity is applied to the coil winding 120, leakage magnetic flux It is possible to illuminate the lighting means 160 with electricity made by being induced in the coil, and the lighting means 160 heats the coil winding part 120 by a general lighting lamp and / or high-frequency electricity. It can be an indicator lamp to inform. The lighting unit 160 is preferably composed of wireless sensor lighting (Wireless sencing lighting).

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and within the technical spirit of the present invention, by those skilled in the art It is clear that modifications and improvements are possible. All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

According to the present invention, as one high-frequency welding machine, it provides economic benefits that can be used for welding objects to be welded in a large or small diameter size.

100: replaceable high-frequency welding machine
110a, 110b: iron core (ferrite core)
118a, 118b: slope portion
120: coil winding part
130: high frequency generator
140a, 140b: Separation coupling means
150a, 150b: valve
10,10': Work to be welded
d,d': diameter of welded object

Claims (3)

It forms a magnetic path connected by a ring by placing it face-to-face with a gap that can be welded, and each A plurality of ferrite cores having a predetermined shape in which a flat inclined surface is formed by removing sharp corners;
A groove corresponding to the air gap is formed on the circumference of the iron core and installed in a state of crossing the air gap, so that when the high frequency generator supplies high frequency electricity, it flows to the welded object located in the air gap, generating a vortex due to the high frequency magnetic flux. A coil winding part made of a water-cooled tube that generates heat for brazing the welded part of the object to be welded; and
Including; a coupler and an on-off valve respectively installed on the coil winding part,
When the diameter of the object to be welded is smaller or larger than the void of the iron core, the coupler separates the iron core like the coil winding part and replaces the iron core with an iron core having a pore size suitable for the diameter of the object to be welded so that it can be combined, In addition, when the coil winding part and the iron core are replaced by the coupler, the cooling water flowing through the water-cooled pipe is temporarily blocked by the on-off valve to prevent leakage. delete According to claim 1,
An insulating and heat-resistant film formed by coating an insulating and heat-resistant paint and then heat-treating the entire surface of the coil winding part and the iron core made of the water-cooled tube is formed.

Images