JP3166756B2 - Capacitor welding positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a capacitor welding positioning apparatus for welding a plurality of pellet elements to one flat support in a capacitor manufacturing process.

[0002]

2. Description of the Related Art Product shapes in the field of electronic components are becoming smaller every day. However, at the same time, the highest content is required in the function at present. In such a situation,
A chip capacitor in the field of capacitors has an outer dimension whose internal element dimension is less than 1 mm square. This small size makes it more difficult to maintain high dimensional accuracy in the assembly process in the manufacturing process.

[0003] Please refer to FIG. 3 and FIG. FIG. 3 is a perspective view showing a conventional set jig 9. Also, FIG.
It is a perspective view showing the positional relationship of each apparatus in the conventional welding. Conventionally, for example, when manufacturing a tantalum capacitor which is a kind of chip capacitor, first, a tantalum wire 3 serving as a lead is erected on one side surface of a pellet element 2a which is a rectangular parallelepiped or cubic tantalum powder, and a unit capacitor element, that is, a capacitor is formed. A pellet 2 is formed. Next, the tantalum wires 3 of the above-mentioned capacitor pellets 2 are set in several tens of units in the grooves 9a of the set jig 9 shown in FIG. 3, and the set jig 9 is an elongated plate-shaped aluminum holder. Align with the weld 7 of 1a. And
The tip of the tantalum wire 3 of the capacitor pellet 2 is continuously welded to the welding portion 7 of the aluminum holder 1a. Next, an oxide film is collectively formed on the aluminum holder 1a to which several tens of capacitor pellets 2 are welded. This makes it possible to collectively process a large number of capacitor pellets 2 in a manufacturing process such as a chemical conversion step. Hereinafter, this step will be described in more detail.

Please refer to FIG. 2 and FIG. FIG. 2 is a top view of the alignment plate 13. Before welding, the capacitor pellets 2 are arranged on the flat alignment plate 13 in a state of being uniformly aligned (FIG. 3). Then, the capacitor pellets 2 arranged on the alignment plate 13 are placed on the alignment set jig 9 shown in FIG.
) By machine or human hand. At this time, the tantalum wire 3 of the capacitor pellet 2 is arranged so as to be sandwiched in the groove 9 a of the set jig 9. Then, in a unit of several tens (approximately 40 to 60 pieces), it is continuously arranged and welded to the aluminum holder 1a, which is a long and thin plate-like body, by a machine or a human hand.

Hereinafter, a case where the above welding step is performed by a machine will be described. Please refer to FIG. 4 and FIG. FIG.
FIG. 5 is a side view of a welding device for welding the capacitor pellet 2 to the aluminum holder 1a. In the welding apparatus shown in FIG. 4, the capacitor pellets 2 arranged on the alignment plate 13 are placed on the alignment set jig 9 shown in FIG. 3 by a predetermined number (about 40 to 60). It shifts and is welded to the aluminum holder 1a. In FIG. 4, the aluminum holder 1a is arranged horizontally (parallel to the xz plane) and parallel to the x-axis.
1 and is fixed while inserted. Set jig 9
Are arranged and fixed along the aluminum holder 1a so that the grooves 9a are aligned with the welded portions 7 of the aluminum holder 1a. Further, the alignment plate 13 is arranged along the upper surface of the set jig 9.

The pressing portion 12 selects one of the capacitor pellets 2 arranged in a state of being aligned on the alignment plate 13 in a row closest to the aluminum holder 1 a and pushes out the same toward the set jig 9. The capacitor pellet 2 pushed out from the alignment plate 13 onto the set jig 9 by the holding part 12 is inserted into the groove 9 a of the set jig 9 so that the tip end comes on the welded part 7 of the aluminum holder 1 a. Is set in the set jig 9. Thereafter, the upper electrode 10 and the lower electrode 11 are assembled by welding to the aluminum holder 1a by resistance welding.

In this case, the accuracy of the welding dimensions of the aluminum holder 1a and the capacitor pellet 2 is determined by the pressing portion 1 shown in FIG.
2. Determined by the accuracy of the mechanical mechanism of the alignment plate 13.

Japanese Patent Application Laid-Open No. Hei 9-148187 discloses that when the anode rod of a package type electrolytic capacitor is fixed to an anode lead terminal by welding, the welding position of the anode rod of the capacitor moves with respect to the anode lead terminal. To prevent
There is proposed an aspect in which a raising piece for fixing an anode rod of a capacitor is provided on an anode lead terminal, and the anode rod of the capacitor is fixed to the raising piece to perform welding.

[0009]

However, the prior art has the following problems.

[0010] 1. There was a problem that the quality of the product deteriorated. This is because it is difficult to increase the positioning accuracy of welding when using a jig such as the set jig 9 described above. At the time of positioning, the accuracy is affected by the processing accuracy of the jig used. When these jigs are used repeatedly, the jigs wear and the alignment state of the capacitor pellets 2 varies. As a result, in the manufacturing process in the subsequent process (a chemical conversion process or a wire oxide film removing process which is a pre-process for welding to a lead frame), processing unevenness occurs in each of several tens of capacitor pellets 2, Characteristics become unstable,
Since the quality varies, the quality is reduced as a whole. Japanese Patent Application Laid-Open No. Hei 9-148187 is considered to have a similar problem.

2. There is a problem that the production yield of the capacitor is reduced. When the positioning of the capacitor pellet 2 is performed by a machine using a jig such as the set jig 9, a mechanism for positioning directly applies a mechanically forcing force to the element (capacitor pellet 2) itself. In addition, chipping and cracking may occur in the element, and the production yield of the capacitor is reduced.

3. There was a problem that work efficiency was poor. This is because the welding method of mechanically positioning the capacitor pellet 2 by using a jig such as the set jig 9 is a mechanism that is difficult to adjust when mechanically stabilizing the alignment mechanism such as adjustment of the jig. And the welding operation process becomes complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a capacitor welding positioning apparatus which has high capacitor product quality, high production yield, and high working efficiency. is there.

[0014]

Means for Solving the Problems In order to solve the above problems, the present invention has the following constitution. The gist of the invention according to claim 1 is a positioning device for welding a plurality of pellet elements to a single plate-shaped support in a manufacturing process of a capacitor. The present invention resides in a capacitor welding positioning device, characterized in that there is an adjusting tool having a groove for fitting and being separably supported by the support tool. The gist of the invention according to claim 2 is that the groove of the adjusting tool extends at a right angle from one side of the supporting tool with respect to a straight line connecting a welded portion of the lead on the supporting tool. A capacitor welding positioning device according to claim 1. The gist of the invention according to claim 3 is that, at a boundary between the adjustment tool and the support tool, a V-groove for facilitating separation from the support tool is provided with a welded portion of a lead on the support tool. The capacitor welding positioning device according to claim 1 or 2, wherein the capacitor welding positioning device is cut parallel to a connecting straight line. The gist of the invention according to claim 4 is a positioning method for welding a plurality of pellet elements to one flat plate-like support in a manufacturing process of the capacitor, wherein the plate-like body is used. A groove for aligning the lead of the pellet element is formed on the upper surface of the adjusting tool 1c, and the adjusting tool is detachably supported by the support tool. The gist of the invention according to claim 5 is that the groove of the adjusting tool is formed so as to extend at a right angle from one side of the supporting tool with respect to a straight line connecting a welded portion of the lead on the supporting tool. The present invention resides in a capacitor welding positioning method according to claim 4. The gist of the invention according to claim 6 is that, at a boundary between the adjustment tool and the support tool, a V-groove for facilitating separation from the support tool, and a welded portion of a lead on the support tool are formed. A capacitor welding positioning method according to claim 4 or 5, wherein the straight line is cut in parallel with the connecting straight line. The gist of the invention according to claim 7 is that the adjusting tool having a V-groove is positioned upward with a rotation axis being a straight line parallel to a straight line connecting a lead to be welded on the supporting tool. The method according to any one of claims 1 to 6, wherein the tool is rotated and the capacitor pellets are arranged in that state.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Please refer to FIG. FIG. 1 is a perspective view illustrating an embodiment of the present invention. As shown in FIG. 1, the capacitor welding positioning apparatus according to the present embodiment is an aluminum holder 1 of a substantially rectangular plate-like body divided into a support 1b and an adjuster 1c with a separation line 8 as a boundary.

The capacitor pellet 2 has a shape in which a tantalum wire 3 is embedded in a pellet element 2a which is a rectangular parallelepiped or cubic tantalum powder. At this time, the tantalum wire 3 moves with respect to the pellet element 2a.
It is produced to be located at the center in the vertical direction (y direction).

An aluminum holder 1 having a substantially rectangular flat plate shape
On the upper surface near one of the long sides, V extends parallel to the long side.
The groove 6 (separation line 8) is cut, and is divided into a support 1b and an adjuster 1c. Further, in the adjusting tool 1c, several tens of round grooves (wire guide portions 4) extending from the V-groove 6 at right angles to the long sides described above (50 in this embodiment).
Has been cut.

Next, a welding positioning method using the capacitor welding positioning apparatus of the present invention will be described.

The operator uses the aluminum holder 1 with the center axis parallel to the V-groove 6 (dashed line in FIG. 1) as the rotation axis and the length of the wire guide portion 4 cut (adjustment tool 1c). Rotate in the direction in which the side is pushed up from below (FIG. 1: direction of arrow R) and tilt about 40 to 50 degrees. Then, the tantalum wire 3 of the capacitor pellet 2 is connected to the aluminum holder 1
The capacitor pellet 2 is placed on the adjustment tool 1c of the aluminum holder 1 in accordance with the wire guide portion 4 of FIG.

The operator thus operates the capacitor pellet 2
On the welding part 7 of the adjusting tool 1c of the aluminum holder 1
The tip of the tantalum wire 3 of the capacitor pellet 2 is
Using the welding apparatus shown in FIG. 4, the electrodes 10 and 11 are pressed against each other to perform electrical welding.

After the welding is completed, the worker holds the aluminum holder 1
Is folded in two with the V-groove 6 as the boundary (the support 1b and the adjuster 1c).
And the unnecessary adjusting tool 1c is separated. That is, the bottom of the V groove 6 becomes the separation line 8.

Since the capacitor welding positioning apparatus according to the embodiment is configured as described above, the following effects can be obtained.

Since the tantalum wire 3 of the capacitor pellet 2 is embedded in the center of the pellet element 2a in the vertical direction (y-axis), by following the wire guide portion 4, for example, the upper surface of the aluminum holder 1 is referenced. Then, the height to the top surface of the pellet element 2a projecting upward from the reference surface in the y direction is constant. That is, unevenness of the head (top surface) of the pellet element 2a is prevented. This is because when the oxide film is formed by immersion in an electrolytic solution in a later step, the height of the top surface of the pellet element 2a is different, and the unevenness of the treatment such as insufficient formation of the oxide film is prevented. In addition, there is an effect of preventing variations in characteristics.

Further, by arranging the tantalum wire 3 in accordance with the wire guide portion 4, the capacitor pellet 2 is welded to the welding portion 7 of the aluminum holder 1 at a constant angle on a horizontal plane (xz plane). .

Further, the aluminum holder 1 is set at about 40 degrees.
By arranging the capacitor pellet 2 at an angle of 50 degrees, the side of the pellet element 2a in which the tantalum wire 3 is embedded naturally fits the long side of the adjuster 1c of the aluminum holder 1 due to the weight of the capacitor pellet 2 itself. To align along the long side (alignment reference plane 5) of the adjusting tool 1c of the aluminum holder 1.

These positioning operations are performed without applying a mechanical force to the capacitor pellet 2.

In the present embodiment, the present invention is not limited to this, and can be applied to a capacitor welding positioning device suitable for applying the present invention.

Further, the number, position, shape, etc. of the above-mentioned constituent members are not limited to the above-mentioned embodiment, but can be set to suitable numbers, positions, shapes, etc. for implementing the present invention.

In the drawings, the same components are denoted by the same reference numerals.

[0031]

Since the present invention is configured as described above, the following effects can be obtained.

1. Quality is improved. This is for the following reason.

The capacitor pellets 2 which are dozens of small parts are welded under a certain condition by arranging the tantalum wire 3 along the wire guide portion 4 cut on the upper surface of the inclined aluminum holder 1. You. In other words, the pellet element 2a of the capacitor pellet 2 is at the same distance (in the z direction) at a fixed angle on the horizontal plane (xz plane) with respect to the welded portion 7 of the aluminum holder 1, and is constant in the vertical direction (y-axis direction). Is located at the height of the weld.

As described above, the positional relationship between the aluminum holder 1 and the pellet element 2a, that is, the capacitor pellet 2, is made uniform, so that the post-process (the oxidation process of the wire which is a pre-process for forming or welding to the lead frame) is performed. In the manufacturing process in the film removal process), uniform processing is performed on each of several tens of capacitor pellets 2 to stabilize characteristics (stable immersion level in the chemical conversion process = stable characteristics) and improve quality.

2. The yield is improved. This is because the positioning operation of the embodiment of the present invention is performed without applying a mechanical force to the capacitor pellet 2, so that the capacitor pellet 2 is not damaged by applying an excessive force (stress) by the machine. Because.

3. Since the welding operation process is simplified because the set jig 9 is not used unlike the conventional example, the operation efficiency is improved.

[0037]

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an embodiment of the present invention.

FIG. 2 is a top view of the alignment plate 13;

FIG. 3 is a perspective view showing a conventional set jig 9;

FIG. 4 is a diagram showing a capacitor pellet 2 in an aluminum holder 1a.
FIG. 4 is a plan view illustrating a side surface of a welding device for performing welding on a steel plate.

FIG. 5 is a perspective view showing a positional relationship between devices in conventional welding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aluminum holder 1a Aluminum holder 1b Supporting tool 1c Adjusting tool 2 Capacitor pellet 2a Pellet element 3 Tantalum wire 4 Wire guide part 5 Alignment reference plane 6 V groove 7 Welded part 8 Separation line 9 Set jig 9a Set jig groove 10 Upper electrode 11 Lower electrode 12 Holder 13 Alignment plate

Claims (7)

(57) [Claims] 1. A positioning device for welding a plurality of pellet elements to a single flat support in a manufacturing process of a capacitor, wherein a groove for aligning a lead of the pellet elements is formed on an upper surface. A capacitor welding positioning device, comprising: an adjusting tool detachably supported by the support tool. 2. The adjustment tool according to claim 1, wherein the groove of the adjustment tool extends at a right angle from one side of the support tool with respect to a straight line connecting a welded portion of the lead on the support tool. Capacitor welding positioning device. 3. A boundary between the adjustment tool and the support tool,
The V-groove for facilitating separation from the support is cut in parallel to a straight line connecting a welded portion of a lead on the support. The capacitor welding positioning device according to the above. 4. A positioning method for welding a plurality of pellet elements to a single flat plate-like support member in a process of manufacturing a capacitor, the method comprising: Forming a groove for aligning the leads of the pellet element, and supporting the adjuster so as to be separable by the supporter. 5. The groove of the adjusting tool is formed so as to extend at right angles from one side of the supporting tool with respect to a straight line connecting a welded portion of a lead on the supporting tool. 4. The method for positioning a capacitor according to claim 4. 6. A boundary between the adjustment tool and the support tool,
6. The capacitor according to claim 4, wherein a V-groove for facilitating separation from the support is cut in parallel with a straight line connecting a welded portion of a lead on the support. Weld positioning method. 7. The support tool is rotated such that the adjustment tool with a V-groove is positioned on a straight line parallel to a straight line connecting a welded portion of the lead on the support tool with the rotation axis as a rotation axis.
The capacitor welding positioning method according to any one of claims 1 to 6, wherein the capacitor pellets are arranged in that state.