KR20040028829A - BALUN trans - Google Patents

Abstract

PURPOSE: A method for assembling and a fabricating a balun transformer is provided to perform easily a twisting process and reduce largely a time for winding process by bending a first and a second wires to form J-shaped wires. CONSTITUTION: A wire rod supply process is performed to supply continuously wire rods(3,4) in order to wind the wire rods(3,4) around the bobbins(1,2). A coating layer stripping process is performed to remove an insulating coating layer in a predetermined interval from the wire rods(3,4) and form alternately stripped parts and coating parts on the wire rods. A cutting process is performed to cut the stripped parts of the wire rods and form a first and a second wires(6,7). The J-shaped wires are formed by bending the first and the second wires(6,7) on the basis of the coating parts of rod wires. The first and the second wires are inserted into a first and a second wire insertion holes(11,12) of a core body. Each long support leg(6a,7a) of the first and the second wires are inserted into different wire insertion holes. A wire winding process is performed to twist the long support legs(6a,7a) of the first and the second wires. The support legs are cut in a predetermined interval.

Description

Balun trans assembly manufacturing method {BALUN trans}

The present invention relates to a manufacturing method of the balun transformer.

The balun transformer is a kind of high frequency transformer and is an electronic component that is widely used as a circuit component of various electronic products such as a TV tuner.

The balun transformer 30 is inserted through a core body 33 having two wire insertion holes 31 and 32, and the wire insertion holes 31 and 32 as shown in FIG. It consists of the primary side wire 35 and the secondary side wire 36 soldered to 34.

Accordingly, when a voltage is applied to the primary side wire 35, the converted voltage is output to the secondary side wire 36.

However, since the core body 33 is very small in size and the diameter of the wire insertion holes 31 and 32 is very small, the assembling work of the wires 35 and 36 by hand is very difficult, and furthermore, 1, The secondary wires 35 and 36 are covered by an insulating coating, and the following problems are exposed because the ends 35a and 36a of both wires 35 and 36 are twisted and connected to each other.

First, the assembly manufacturing process of the conventional balun transformer will be described with reference to FIG. 7.

After cutting the predetermined length of the wires 35 and 36 required from the insulated coated long wires 37 and 38 (step 1), the wires 35 and 36 of the core body 33 The wire insertion holes 31 and 32 are bent and inserted into a U shape (step 2).

Next, the ends 35a and 36a, which are the supporting legs of the respective wires 35 and 36, are put together and twisted together (step 3).

Then, the end portion is cut by the cutter 39 so as to have a predetermined length (step 4).

The balun transformer 30 manufactured as described above is sent to the PCB substrate assembly plant and mounted by soldering 40 to the PCB substrate 34 at a designated position on the designed circuit (FIG. 7).

However, according to the conventional manufacturing method of the balun transformer 30 as described above, when the wires 35 and 36 are assembled into the core body 33, the four strands are pulled out through the wire insertion holes 31 and 32. Since the support legs 35a, 35b, 36a, and 36b have almost the same length, it is difficult to immediately identify the two support legs 35a, 36a, which are twisted together to form a single body. The productivity is low due to the increased working time, and the length of the protruding legs is increased for the convenience of the twisting operation. The problem is that there is a large amount of wire that is discarded during the cutting process (step 4) for the preparation of the supporting legs after the twisting operation. When soldering the support legs 35a, 35b, 36a, 36b of the balun trans 30 to the PCB board 34, the ends of the respective wires 35, 36 are covered. The soldering temperature is high because the coating applied to the Problem has been pointed out that the soldering time is set and the soldering time is delayed.

Accordingly, the present invention has been proposed in view of the above point, and its object is to provide a method for fabricating a balun transformer with little waste of material, greatly shortening assembly time and excellent solderability to a PCB substrate.

The present invention provides a wire rod for continuously supplying a long insulated coated wire rod wound on a bobbin in an assembly manufacturing method of a balun transformer in which a primary side wire and a secondary side wire are assembled to a core body in order to achieve the above object. Process;

A stripping process of stripping the insulated coating at regular intervals and intervals so that the coating portion and the spiral portion are repeatedly shown;

A cutting step of forming a primary side and a secondary side wire by cutting the middle of the spiral part so that one side of the spiral part has a length longer than that of the opposite side, based on the covering part;

A bending process of bending the J-shape on the basis of the covering part such that one leg of the wire protrudes longer than the other leg;

The primary and secondary wires each bent in the J shape are inserted into the wire insertion holes of the core body having the two holes, and the wire inserts are inserted such that the long support legs are inserted through the different wire insertion holes to protrude. Process;

A wire winding process of twisting two long supporting legs which are opposed to each other;

It is configured to include; a length trimming process for cutting the support legs neatly to have a predetermined length.

After the trimming step is completed, a solder coating step is performed on the bare support leg of the peeled-off coating.

According to this manufacturing method, the support legs that are twisted together are protruded longer than the other support legs that are not twisted, and are easily distinguished from the short support legs, so that the two long support legs can be easily pinched and immediately twisted. In addition, the short support leg side reduces the amount that is cut off during trimming operation, and because the cover of the support leg is peeled off, the soldering work temperature can be lowered and the soldering time is shortened. Since the solder is applied to the part of the supporting leg that has been stripped, the rust is prevented even if the product is stored for a long time and the working time is greatly shortened because it is easily fused by the solder applied to the supporting leg during soldering to the PCB. .

Figure 1 is a schematic process diagram showing the assembly manufacturing process of the balun transformer according to the present invention

Figure 2 is a detailed view showing the assembly manufacturing method of the balun transformer according to the present invention for each process

3 is a cross-sectional view showing an insulating coating state of the wire rod and the wire of the present invention.

Figure 4 is a perspective view of the core body of the present invention

5 is a view showing a state in which the balun transformer manufactured by the present invention mounted on the PCB board

6 is a view for explaining the prior art.

7 is a view showing a manufacturing process of the conventional balun transformer

※ Explanation of code for main part of drawing

1,2: bobbin 3,4: wire rod

5,5a: Cutter 6,7: Wire (primary side, secondary side)

6a, 7a: long support legs 6b, 7b: short support legs

8,9 insulation coating 10: core body

11,12 wire insertion hole 13 cutting machine

14: washing liquid 15: soldering liquid

16 balun transformer 17 PCB substrate

18: soldering 19: tool tip

20 tool

Hereinafter, the configuration of the present invention will be described with reference to the accompanying drawings.

1 is a schematic process diagram showing the assembly manufacturing process of the balun transformer according to the present invention, Figure 2 is a detailed process diagram showing the assembly manufacturing process of the in-phase balun transformer.

The wire rods 3 and 4 of the long material wound around the bobbin 1 and 2 are continuously drawn out and pulled straight in a forward direction (step 1).

The long wires 3 and 4 are coated with insulating coatings 8 and 9, as shown in Fig. 3, which is a cross-sectional view thereof, which uses two wires after the wire insertion process of Figs. This is to maintain the insulation state when the covering portions (6 and 9 in step 5) of (6) (7) come into contact with each other. In addition, the colors of the insulating coatings 8 and 9 of the two wires 3 and 4 supplied side by side are different from each other, for example, the color of the coating 8 of the one wire 3 is red and the other wire ( The color of the coating 9 of 4) is formed to be distinguished from each other, such as black, to facilitate the wire winding process described later.

The wire rods 3 and 4 of the above-mentioned long product are subjected to a coating removal step of peeling off the coating at a predetermined interval and at a predetermined interval during the transfer (step 2). The removal of the coating is performed by rotating the tool 20 to rotate the outer periphery of the wire rod with the tool tip 19 in contact with the outer surface of the wire rod 3 (4). By conveying the wire rod (or the wire rod), it is possible to remove the coating of the wire rods 3 and 4 by a length L at regular intervals.

The supporting legs 6a, 6b, 7a, and 7b at both ends described later through this coating removing step are in a spiral state.

The wire strip (3) (4) stripped of the coating at regular intervals (L) has its cutter (5) in its middle such that its spiral portion (L) forms long and short support legs (6a, 7a) (6b, 7b). 5a) is used to cut the primary and secondary wires 6 and 7 which are cut and separated from the wire rod 3 and 4 by cutting (L ₁ : short support leg and L ₂ : long support leg for twisting). (Total length of the cut wire: L ₁ + L ₂ + L ₃ ) (step 3).

Next, a bending process of bending the wires 6 and 7 to form a J shape (or cane shape) with respect to the covering portions 8 and 9 is performed, so that the supporting legs 6a and 7a are the other supporting legs 6b. And protruded longer than 7b (step 4).

Meanwhile, the core body 10 as shown in FIG. 4 is transferred to a downward position of the J-shaped bent wires 6 and 7 through a media alignment conveyor device through a separate supply line from the wire supply line. (Steps A and B), the bent wires 6 and 7 are formed with their supporting legs 6a, 6b, 7a and 7b in the wire insertion holes 11 and 12 of the core body 10. The wire insertion process is performed through the wire insertion process so that the long supporting legs 6a and 7a are inserted through different holes (step 5).

In this way, the long supporting legs 6a and 7a protrude downwardly longer than the short supporting legs 6b and 7b.

After the wire insertion process, two long support legs 6a and 7a are put together to perform a wire winding process where they are twisted together (step 6). At this time, the self-winding device exclusively patented by the present inventors to perform a manual operation by twisting the tool by pinching together two long protruding legs 6a, 7a protruding by using a subtracted light or the like. Using two pins (6a) (7a) long pinching together and then rotated to perform a twisting operation, the longer support that protrudes longer than the other short support legs (6b) (7b) to be twisted together The legs 6a, 7a can be easily identified and easily pinched and twisted to enable automation of the twisting operation, thereby significantly improving productivity.

After the wire winding process, a length trimming process is performed in which all supporting legs 6a, 6b, 7a, and 7b are trimmed by using the cutter 13 so as to have a designed length l. Step 7).

Next, the supporting legs 6a, 6b, 7a, and 7b are immersed in the cleaning liquid 14 to perform the cleaning process (step 8), and then the supporting legs 6a are easily mounted on the PCB substrate. The process of manufacturing the balun transformer 16 according to the present invention is performed by applying a flux solution to (6b, 7a, 7b) and immersing it in the solder solution 15 so that the solder is applied (step 9). It is over.

The first embodiment of the wire cutting process, while the wire (3) (4) of the long supply in order for the process and and also mubang subjected to coating removal processing to the next step, wherein the two ends of the cutting wire L ₁ The coating should be stripped unevenly by the length of and L ₂ . However, in the automation of the process, it is more efficient in terms of productivity that the coating removal process is first performed as in the embodiment of the present invention, and the wire cutting process is performed immediately before the bending process into a J-shape.

The balun transformer 16 manufactured as described above is supplied to a production factory of electronic products so that the supporting legs 6a, 7a, 6b, and 7b are soldered on the PCB substrate 17 as shown in FIG. By being mounted, it functions as a designed transformer.

According to the present invention as described above, the primary and secondary wires are bent in a J shape (stick) shape so that one support leg is protruded longer than the other support leg and is inserted into the wire insertion hole of the core body so that it protrudes long. By simply identifying the two long legs that are easily pinched and performing the twisting operation, the winding work time is greatly reduced, and only the long supporting legs twisted to the short supporting legs are cut when cutting the supporting legs so that they are neatly trimmed. Since the amount of discarded by cutting is reduced, it prevents waste of resources, and since the support legs of the spirals soldered to the PCB board are coated with solder and stored and distributed, the oxidation of the support legs is prevented even if stored for a long time. In addition, soldering is very quick and easy even at low temperatures. There is an effect that can greatly shorten the mounting work time.

Claims (4)

A method of assembling a balun transformer in which a primary side wire and a secondary side wire are assembled to a core body, comprising: a wire rod supplying step of continuously supplying a long insulating coated wire rod wound on a bobbin; A stripping process of stripping the insulated coating at regular intervals and intervals so that the coating portion and the spiral portion are repeatedly shown; A cutting step of forming a primary side and a secondary side wire by cutting the middle of the spiral part so that one side of the spiral part has a length longer than that of the opposite side, based on the covering part; A bending process of bending the J-shape on the basis of the covering part such that one leg of the wire protrudes longer than the other leg; The primary and secondary wires each bent in the J shape are inserted into the wire insertion holes of the core body having the two holes, and the wire inserts are inserted so that the long support legs are inserted through the different wire insertion holes to protrude. Process; A wire winding process of twisting two long supporting legs which are opposed to each other; And a length trimming process of cutting the support legs neatly to have a predetermined length. The method of claim 1, And a solder coating step is applied to the support legs in a stripped spiral state after the trimming process is completed, and solder is applied. The method of claim 2, And a method of cleaning and flux applying the support legs prior to the solder coating process. The method according to any one of claims 1 to 3, The primary and secondary wire cutting process is performed prior to the coating removing step, and the fabrication of the balun transformer is carried out, wherein the coating removing step of stripping the coating at both ends of the wire formed by the cutting step is performed at different intervals. Way.