KR101909246B1 - Fuse making apparatus - Google Patents

Abstract

The present invention relates to a fuse manufacturing apparatus. In the present invention, a die 50 on which the bus bar 20 is seated is provided, and a punch 52 is installed to lift the die 50 from above. On the side where the punch 52 is installed, a first guide 54 is provided and a supply hole 56 through which the low-melting metal 70 to be supplied passes is formed. A part of the carrier 66 is moved in the inner space 55 of the first guide 54. [ A carrier supply hole 68 is formed in the carrier 66 so that the tip end of the low melting point metal 70 passing through the supply hole 56 is cut by a predetermined length. The first guide 54 is provided with a second guide 60 to press the bus bar 20 onto the die 50. A second punch hole 62 is formed in the second guide 60 at a position corresponding to the fixed portion 32 of the bus bar 20 so that the low melting point metal 70 are positioned on the fixing portion 32. According to the present invention, there is an advantage that the low melting point metal 70 can be easily fixed to the fixing portion 32 of the bus bar 20.

Description

[0001] FUSE DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fuse manufacturing apparatus, and more particularly to a fuse manufacturing apparatus for temporarily fixing a low melting point metal forming a fusing end portion of a fuse.

Electrical components using electricity are supplied with electricity from a power source such as a battery or a generator, and perform functions. However, when the electric parts are overloaded, the electric parts are damaged and become unusable.

To prevent this, if the fuse is placed between the power source and the electric component, if the electric component is overloaded, the fuse is blown and the electric component is cut off to protect the electric component. If the fuse is used in this way, it will not damage the electric parts due to the break of the fuse. Therefore, if the damaged fuse is changed, the electric parts can be used as it is.

When many electric parts such as automobiles are used, a multi-fuse having a plurality of fuses may be used. Such a multi-fuse is advantageous over the use of a plurality of fuses because the plurality of fuses are integrated into one unit and are relatively large in size as compared with a case where a plurality of fuses are separately used. However, miniaturization is also required in such a multi-fuse.

FIG. 1 is a perspective view of a bus bar showing a configuration of a single fuse in a general multi-fuse.

The bus bar 10 shown in the figures shows only a very small portion for convenience. That is, the fused portion 15 and its periphery for one electric component are shown. The bus bar 10 is provided with a first connection part 11 and a second connection part 12, respectively. The first connection part 11 is connected to the power source side and the second connection part 12 is connected to the load, that is, the electric component.

The first and second resistance forming portions 13 and 14 are formed so as to connect the first connecting portion 11 and the second connecting portion 12. The resistance forming portions 13 and 14 are connected to each other, . The resistance forming portions 13 and 14 set the strength of resistance while varying their length and shape. The free end portion 15 is a portion that actually melts and breaks when an overload occurs.

Bending projections (17) projecting to both sides in the width direction of the free end (15) are formed in pairs. The pair of bending projections 17 are formed at two places. The bending protrusion 17 fixes and melts a metal such as the tin 19 forming the free end 15 to the free end 15.

The bending protrusion 17 of the free end portion 15 constructed as described above is made integral with the free end portion 15 when the bus bar 10 is manufactured as shown in FIG. That is, one metal plate is formed through a pressing process as shown in FIG. 1 (a), and then a tin 19 is placed on the metal plate to bend and fix the bending protrusion 17, followed by a melting process.

However, in the conventional bus bar 10, since the bending protrusions 17 are located in the free ends 15 corresponding to the electrical components, In designing, it becomes an element that determines the size of the bus bar 10. Therefore, when the entire bus bar 10 is miniaturized, there is a problem that the bending protrusion 17 becomes an obstacle.

The applicant of the present invention has developed a fuse manufacturing apparatus capable of removing the bending projection 17 from the bus bar 10 and pressing the tin 19 at the portion where the fusing end 15 is formed to temporarily fix it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fuse manufacturing apparatus for temporarily fixing a low melting point metal to a fusing end portion of a bus bar used in a fuse.

According to an aspect of the present invention, there is provided a fuse manufacturing apparatus for temporarily fixing a low melting point metal to a fuse end portion of a bus bar used in a fuse, A punch which moves in relation to the die and strikes a low melting point metal which is seated on a fixed portion formed on the free end portion; a feed hole through which the low melting point metal passes and which fixes the bus bar on the die; 1 guide and a carrier supply hole formed at a position corresponding to the supply hole to move with respect to the first guide in a state in which the tip end of the low melting point metal is seated to cut the low melting point metal, And a carrier for moving.

The first guide has a first punch hole through which the punch passes at a position spaced a predetermined distance from the supply hole so that the low melting point metal moved by the carrier is fixed to the fixing part by the impact of the punch.

An inner space through which the carrier moves is formed in the first guide.

The first guide further includes a second guide for pressing the bus bar against the die, and a second punch hole through which the punch passes is formed in the second guide at a position corresponding to the fixed portion.

A part of the carrier is moved in the inner space through a space between the first guide and the second guide.

The lower surface of the second guide is further provided with an interference avoiding portion for preventing interference with the projecting portion of the bus bar.

According to another aspect of the present invention, there is provided a fuse manufacturing apparatus for temporarily fixing a low melting point metal to a fuse end portion of a bus bar used in a fuse, the device comprising: a die on which the bus bar is seated; A first guide which is provided on a side where the die is installed and in which a supply hole through which the low melting point metal passes is formed; A carrier which moves with respect to the first guide in a state in which the tip of the low melting point metal is seated and a low melting point metal is cut and moved to a fixed portion formed in the free end portion, A second punch hole is formed at a position corresponding to the fixing portion, and a second guide for pressing and fixing the bus bar to the die .

The first guide has a first punch hole through which the punch passes at a position corresponding to the second punch hole of the second guide.

The lower surface of the second guide is further provided with an interference avoiding portion for preventing interference with the projecting portion of the bus bar.

In the fuse producing apparatus according to the present invention, the following effects can be obtained.

In the fuse manufacturing apparatus of the present invention, since the low melting point metal can be pressed and fixed to the portion made from the bus bar used for the fuse, the size of the structure for fixing the low melting point metal to the bus bar used in the fuse is minimized So that the size of the bus bar can be miniaturized and the fuse can be miniaturized.

In the fuse manufacturing apparatus of the present invention, the supplied low melting point metal is cut by the movement of the carrier and simultaneously moved to a position corresponding to the fusing end of the bus bar and press-fitted into the fixing portion of the fusing end by using a punch The manufacturing of the bus bar used in the fuse can be performed more quickly.

Fig. 1 (a) is a perspective view showing an important part of a bus bar according to the prior art.
FIG. 1 (b) is a perspective view showing a state in which tin is fixed to the terminal end portion of the bus bar according to the related art. FIG.
2 is a perspective view showing a preferred embodiment of an apparatus for manufacturing a fuse according to the present invention.
3 is a cross-sectional perspective view showing the configuration of an important part of the embodiment of the present invention.
4 is a perspective view showing a configuration of a bus bar made in an embodiment of the present invention;
FIG. 5 is an operational state view showing a state where a low melting point metal is supplied to a carrier supply hole of a carrier in the embodiment of the present invention. FIG.
FIG. 6 is an operational state view showing that a low-melting-point metal is cut and moved in a state in which a carrier is moved in a state where it is seated on a carrier supply hole in the embodiment of the present invention.
FIG. 7 is an operational state view showing a process in which a low melting point metal moved by a carrier in the embodiment of the present invention is struck by a punch and fixed to a fixed portion of a bus bar; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a fuse manufacturing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a bus bar used in the fuse manufacturing apparatus of the present invention will be briefly described with reference to FIG. The bus bar 20 is made of a conductive metal material. The bus bar 20 may be provided in the fuse manufacturing apparatus of the present invention in a state shown in FIG.

An input terminal portion 22 is formed at one end of the bus bar 20. The input terminal portion 22 is a portion electrically connected to a power source (not shown), for example, a battery or a generator. An external terminal (not shown) connected to the end of the wire connected to the power source is connected to the input terminal portion 22. And a connection part 24 extending from the input terminal part 22 is provided. The connection portion 24 is integrally formed with the input terminal portion 22 and extends in one direction.

And a heat dissipation unit 25 formed integrally with the connection unit 24 and bent to face the connection unit 24. The heat radiating part 25 is a part for emitting heat generated in the bus bar 20. [ And ten output terminal portions 26 extending from the connection portion 24 are provided. The output terminal portion 26 is connected to the opposite side of the heat radiating portion 25 from the connecting portion 24. The output terminal portion 26 is a portion electrically connected to each electric component side.

A resistor forming portion 28 is formed to connect between the connecting portion 24 and the output terminal portion 26. The resistance forming portion 28 mainly has different lengths to set the size of the resistance to match the characteristics of electrical components. For reference, the resistor forming portion 28 on the right side in the drawing is formed in a zigzag part so as to have a relatively long length.

The resistor forming portion 28 is provided with a free end portion 30. The free end portion 30 is melted on a surface of a low melting point metal such as tin or tin alloy over a predetermined area, and is melted when the overload is applied to the electric component.

The free end portion 30 is formed in a disk shape. However, the fusing end 30 is not necessarily of a disk shape, but may be of a size capable of forming a fixing portion 32 for fixing and fixing the low melting point metal 70. The fixed end (32) to which the low melting point metal (70) is fixed is formed in the free end (30). The fixing portion 32 is formed to be concave on the surface of the free end portion 30. [

The configuration of the fuse manufacturing apparatus of the embodiment of the present invention will now be described. In the present invention, a die 50 on which the bus bar 20 is mounted is provided. The bus bar 20 is seated on the upper surface of the die 50. An operation of fixing the low melting point metal 70 in a state in which the bus bar 20 is seated on the upper surface of the die 50 is performed. A fixed end 51 protrudes from the upper surface of the die 50 so as to surround a part of the tip of the output terminal portion 26 of the bus bar 20.

A punch 52 is provided above the die 50. The die 50 and the punch 52 may be mounted, for example, in a press machine, wherein the die 50 is mounted on a lower die holder (not shown) and the punch 52 is mounted on a punch holder Not shown). In this case, the punch 52 is lifted and lowered by punching the upper mold holder.

A first guide 54 is provided on the die 50. The first guide 54 may be provided on the side of the image forming holder, for example, or may be installed on a separate fixing part. The first guide 54 has a predetermined inner space 55 formed therein. The shape of the first guide 54 is formed such that the surface of the first guide 54 facing the die 50 and the portion of the carrier 66, which will be described below, are opened, but this is not necessarily so.

A supply hole 56 is formed through the first guide 54 so as to communicate the inner space 55 with the outside. The low melting point metal 70 is supplied through the supply hole 56. The supply hole 56 has a circular cross-section.

The first guide 54 is also formed with a first punch hole 58 at a position spaced apart from the supply hole 56 by a predetermined distance. The first punch hole 58 also communicates with the inner space 55 like the supply hole 56. The first punch hole 58 is a portion through which the punch 52 passes.

A second guide (60) is positioned in the inner space (55) of the first guide (54). The second guide 60 may be provided on the side of the image forming holder together with the first guide 54 or on a separate fixing part. The second guide 60 serves to push and fix the bus bar 20 onto the die 50 when the punch 52 is punched. The second guide 60 may be a rectangular plate shape in the present embodiment, but it may be different according to design conditions, not necessarily.

The second guide 60 is provided with a second punch hole 62 at a position corresponding to the first punch hole 58 so that the punch 52 can approach the fixed portion 32 of the bus bar 20. Is formed. The second punch hole 62 is located at a position corresponding to the fixed portion 32 of the bus bar 20 seated on the die 50.

The surface of the second guide 60 facing the die 50 is provided with an interference fringe portion for preventing interference with a structure protruding like the heat radiation portion 25 of the bus bar 20, (64) are formed.

A carrier 66 is provided to be moved between the first guide 54 and the second guide 60. The carrier 66 is moved between the lower surface of the first guide 54 and the upper surface of the second guide 60 to move the low melting point metal 70 to a predetermined length To the second punch hole (62). The carrier 66 is installed on the upper holder side or the stationary portion provided with the first guide 54 and the second guide 60 and is moved by the driving force of the driving source.

The portion of the carrier 66 that moves in the inner space 55 is in the form of a plate having a thickness corresponding to the clearance between the first guide 54 and the second guide 60. The shape of the carrier 66 is not limited to the illustrated embodiment, and may be variously designed.

A carrier supply hole 68 is formed in the carrier 66. The carrier supply hole 68 is a portion where the low melting point metal 70 is seated. The portion of the low melting point metal 70 that is seated on the carrier supply hole 66 is moved to the second punch hole 62 while the carrier 66 is moved to move the fixed portion 32 of the bus bar 20, Lt; / RTI > The inlet edge of the carrier supply hole 68 may have a structure capable of cutting the low melting point metal 70. Of course, such a structure may be provided at the outlet of the supply hole 56 of the first guide 54 as well. The structure capable of cutting the low-melting point metal 70 is a structure in which the hardness of the portion is larger than the low melting point metal 70 and the first guide 54 and the carrier 66 are relatively moved So that cutting is performed.

Hereinafter, the operation of the fuse manufacturing apparatus according to the present invention will be described in detail.

First, the bus bar 20 is positioned on the upper surface of the die 50. At this time, the position of the bus bar 20 is fixed by the fixed end 51. Next, the first guide 54, the second guide 60, and the carrier 66 are positioned at positions corresponding to the specific output terminal portions 26 of the bus bar 20. This can be accomplished by moving the die 50 or by moving the portions on the side of the mold holder, i.e., the first guide 54, and the like.

Next, the carrier 66 enters the inner space 55 so that the carrier supply hole 68 coincides with the supply hole 56 of the first guide 54. In this state, the low melting point metal 70 is introduced into the carrier supply hole 68 through the supply hole 56. This state is shown in Fig.

When the leading end of the low melting point metal 70 is seated in the carrier supply hole 68, the carrier 66 is moved in a direction to escape from the internal space 55. As the carrier 65 is moved, the portion of the low melting point metal 70 in the carrier supply hole 68 is cut and separated from the portion in the supply hole 56. The movement of the carrier 65 is performed until the carrier supply hole 68 is in a position corresponding to the first punch hole 58 and the second punch hole 62. FIG. 6 shows a state in which the carrier supply hole 68 is in the same position as the first punch hole 58 and the second punch hole 62. In this case, the low melting point metal 70 in the carrier supply hole 68 enters the second punch hole 62.

 When the low melting point metal 70 is positioned in the second punch hole 62, the low melting point metal 70 is seated on the free end 30 of the bus bar 20. In this state, the punch 52 descends and hits the low melting point metal 70. The punch 52 passes through the first punch hole 58 of the first guide 54 and the carrier supply hole 68 of the carrier 66 and enters the second punch hole 62. The punch 52 that enters the second punch hole 62 strikes the low melting point metal 70 so that a part of the punch 52 is press-fitted into the fixing part 32 formed on the free end 30. The low melting point metal 70 is plastically deformed, and a part of the low melting point metal 70 is pushed into the fixing part 32 and press-fitted.

After the punch 52 hits the low melting point metal 70 and is fixed to the fixing portion 32, the punch 52 ascends and exits the carrier 66 and the first guide 54 . In this case, the operation of fixing the low-melting point metal 70 to the one fixing portion 32 is completed.

Since the bus bar 20 has a plurality of fixing portions 32, the operation is repeated until the low melting point metal 70 is fixed to each of the fixing portions 32. To this end, the die 50 is moved or the first guide 54 is moved so that the second punch hole 62 of the second guide 60 is positioned at a position corresponding to the other fixed portion 32 adjacent thereto .

The carrier 66 is then introduced into the interior space 55 so that the carrier supply hole 68 and the supply hole 56 of the first guide 54 coincide with each other.

This state is again the state shown in FIG. 5, in which the low melting point metal 70 is introduced into the carrier supply hole 68 and the above-described process is repeated again. When the low melting point metal 70 is fixed to the entire fixing portion 32 by repeating the above-described operation, work for one bus bar 20 is completed.

The next operation in the state where the low melting point metal 70 is fixed to the fixing portion 32 of the bus bar 20 is to heat and melt the low melting point metal 70 so that the melting point of the melting end portion 30 So as to be integrally distributed in the region.

The scope of the present invention is defined by the appended claims rather than by the foregoing embodiments, and various changes and modifications may be made without departing from the scope of the invention as defined by the appended claims. It is self-evident.

For example, in the illustrated embodiment, the first guide 54 and the second guide 60 cooperate with the carrier 66, but the function of the second guide 60 is not limited to the function of the first guide 54 and the carrier 66 may be separately performed. The first guide 54 presses the bus bar 20 and hits the punch 52 in a state where the low melting point metal 70 is seated in the carrier supply hole 68 of the carrier 66 have. In this case, it is preferable that the bottom surface of the carrier 66 is adjacent to the surface of the bus bar 20.

The first guide 54 is not necessarily provided with the first punch hole 58. That is, the first guide 54 need not extend to a position corresponding to the second punch hole 62.

20: bus bar 22: input terminal part
24: connection part 25:
26: output terminal part 28: resistance forming part
30: free end portion 32:
50: die 51: fixed end
52: punch 54: first guide
55: inner space 56: supply hole
58: first punch hole 60: second guide
62: second punch ball 64: interfering skin
66: carrier 68: carrier supply hole
70: Low melting point metal

Claims (9)

A fuse manufacturing apparatus for temporarily fixing a low-melting-point metal to a fuse end portion of a bus bar used in a fuse,
A die on which the bus bar is seated,
A punch which is moved relative to the die and strikes a low melting point metal seated on a fixed portion formed on the fusing end,
A first guide formed with a supply hole through which the low melting point metal passes and fixing the bus bar on the die,
And a carrier is formed at a position corresponding to the supply hole to move with respect to the first guide in a state in which the tip end of the low melting point metal is seated, The fuse producing device.
[2] The apparatus of claim 1, wherein the first guide includes a first punch hole through which the punch passes at a position spaced a predetermined distance from the supply hole, and the low melting point metal moved by the carrier is hit by the punch, To thereby fix the fuse.
The fuse manufacturing apparatus according to claim 2, wherein an inner space through which the carrier moves is formed in the first guide.
The apparatus according to any one of claims 1 to 3, wherein the first guide further comprises a second guide for pressing the bus bar against the die, and the second guide is provided with a second punch hole through which the punch passes, Wherein the fuse is formed at a position corresponding to the fuse.
5. The apparatus according to claim 4, wherein a portion of the carrier is moved in the inner space through a space between the first guide and the second guide.
The fuse manufacturing apparatus according to claim 5, further comprising an interference avoiding portion for preventing interference with the projecting portion of the bus bar.
A fuse manufacturing apparatus for temporarily fixing a low-melting-point metal to a fuse end portion of a bus bar used in a fuse,
A die on which the bus bar is seated,
A punch which is moved relative to the die and strikes a low melting point metal seated on a fixed portion formed on the fusing end,
A first guide provided on a side where the die is installed and on which a supply hole through which the low melting point metal passes is formed,
A carrier for forming a carrier supply hole at a position corresponding to the supply hole and moving with respect to the first guide in a state in which the tip of the low melting point metal is seated to cut the low melting point metal to a fixed portion formed in the free end portion; ,
And a second guide provided in the first guide and having a second punch hole at a position corresponding to the fixing portion, and pressing and fixing the bus bar to the die.
8. The apparatus according to claim 7, wherein the first guide has a first punch hole through which the punch passes at a position corresponding to the second punch hole of the second guide.
The fuse manufacturing apparatus of claim 7, further comprising an interference avoiding portion for preventing interference with the projecting portion of the bus bar.

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