JP2002219574A - Manufacturing method for package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method capable of obtaining a package free of a welding defective, and high in reliability, wherein the whole periphery of the welding parts come into close contact uniformly to be airtightly welded, in pressing electrodes, even if the deviation in the plate thickness exists. SOLUTION: In the manufacturing method for the package wherein a flange part 2 of a metal cap 3, provided with an opening recess part 1 and the flange part 2 in the vicinity thereof, and a peripheral part 5 of a metal base 4 are resistance welded in a state of being pinched by a pair of electrodes 6 so as to be mutually pressed, the flange part 2 of the metal cap 3 and the peripheral part 5 of the metal base 4 are press-worked partly and over the whole periphery respectively to make into the uniform thickness, and thereafter, resistance- welded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package manufacturing method for manufacturing a package in which a relay component or the like is housed by resistance welding.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 15 and 16, a flange portion 2 of a metal cap 3 formed by drawing and having an opening concave portion 1 and a flange portion 2 therearound, and a peripheral edge of a metal base 4. There is known a package manufacturing method in which a portion 5 and a pair of electrodes 6 are sandwiched by a pair of electrodes 6 and resistance-welded in a state where they are pressed against each other.

In this case, a projection 7 is formed on the press-contact surface of the peripheral edge 5 of the metal base 4, and the flange 2 of the metal cap 3 and the peripheral edge 5 of the metal base 4 are located between the upper and lower electrodes 6. The package is sandwiched and pressed against each other via the same projection 7, and resistance is welded by passing electricity between the electrodes 6 in the pressurized state to manufacture a package in which a relay component is housed. At that time, FIG.
As shown in (b), a rectangular groove S is formed on the end face of the electrode 6.
The groove S accommodates a portion other than the flange portion 2 of the metal cap 3, a terminal on the metal base 4 side, and the like.

However, in the above case, the opening recess 1 has a rectangular opening shape, and the metal cap 3 is formed by drawing press working.
Is formed, and the peripheral portion 5 of the metal base 4 is formed.
When the projection 7 is formed by press working, as shown in FIG. 17, the flange portion 2 of the metal cap 3 and the peripheral portion 5 of the metal base 4 become thick at the corner portion (right side in FIG. 17), and the straight portion And the same flange 2
In addition, the peripheral portion 5 becomes thin (left side in FIG. 17), and when the electrodes 6 are pressurized, a contact gap G is easily generated between the press-contact surface of the flange portion 2 and the projection 7. When the package has a large size, the contact gap G is large.

[0005] When resistance welding is performed by pressing through the projection 7, pressure concentrates on the corner portion to crush the projection 7, and the corner portion acts as a stopper, and the other straight portion does not. It was not sufficiently pressurized. Therefore, there is a problem that welding is performed only at a corner portion and welding failure is likely to occur at other straight portions.

That is, the metal cap 3 and the metal base 4
Is usually formed by press working in consideration of mass productivity and cost, but press working has a limitation in part finish accuracy (plate thickness, warpage, etc.), and in particular, the part size is large. As the shape of the part is more square than the round shape, the finished accuracy of the part is reduced. In this case, when a rectangular component is formed by press working as in the above-described conventional example, the thickness of the corner portion is larger than that of the straight portion.

[0007] As described above, when resistance-welding parts having variations in the plate thickness are performed, when the two electrodes 6 are pressed, the parts having a large plate thickness come into contact with each other, and the thin parts correspond to the stoppers. Become in contact. Therefore, the thick part is welded, but the thin part is not welded, resulting in poor airtightness. Further, since the distance between the upper and lower electrodes 6 is constant, even if the contact is made over the entire circumference, the contact area is larger in the thicker part than in the thinner part, and the electric resistance in the contact part is smaller. The current increases, and when the input current is increased to obtain welding strength, dust is generated in the thick portion.

Therefore, conventionally, Japanese Patent Laid-Open Publication No.
In some cases, an encapsulated electrode as disclosed in Japanese Patent No. 187 is used. In this case, as shown in FIG. 18, the corners i of the groove S provided in the electrode 6 and the opening edge of the central part j on the long side, the flange 2 of the metal cap 3 and the edge 5 of the metal base 4 are formed. A non-contact portion k that does not contact is formed. Therefore, current concentration does not occur at the corner of the package corresponding to the non-contact portion k, and poor welding at the contact gap G (gap) is prevented.

[0009]

However, in the technique disclosed in the above-mentioned conventional Japanese Patent Application Laid-Open No. 1-75187, the groove S of the electrode 6 is formed in a complicated shape.
Since the rigidity of the electrode 6 is small, the electrode 6 cannot receive the pressing force uniformly, and there is a problem that the life of the electrode 6 is shortened. Further, since no pressure is applied at the non-contact portion k, there is a problem that welding is not sufficiently performed at the non-contact portion k.

SUMMARY OF THE INVENTION The present invention has been made in order to solve all the problems in the prior art described above, and its object is to provide an electrode pressurizing device which has a large thickness even if the thickness of a metal cap or a metal base component itself varies. It is an object of the present invention to provide a package manufacturing method which can provide a reliable package free from welding defects by ensuring that the entire periphery of the welded portion is uniformly contacted and hermetically welded.

[0011]

According to a first aspect of the present invention, there is provided a package manufacturing method, comprising: a metal cap formed by drawing and having an opening recess and a flange around the same; In a package manufacturing method in which the peripheral edge portion is sandwiched by a pair of electrodes and resistance-welded in a state where they are pressed against each other, the flange portion of the metal cap and the peripheral portion of the metal base are partially pressed all around the periphery. It is characterized by resistance welding after making the thickness uniform.

Therefore, in this case, even if the thickness of the metal cap or the metal-based component itself varies,
Before resistance welding, the flange portion of the metal cap and the peripheral edge portion of the metal base are partially pressed all over the circumference to have a uniform thickness, and then the flange portion and the peripheral edge portion are paired. Since the resistance welding is performed in a state where the electrodes are sandwiched and pressed against each other, when the electrodes are pressed, the welded portion of the flange portion and the peripheral edge portion is in uniform contact over the entire circumference,
The package is reliably hermetically welded, and a highly reliable package free from poor welding can be obtained. Therefore, airtight welding with high welding quality can be performed even if an electrode having a simple shape is used, without making the groove of the electrode have a complicated shape as in the related art.

According to a second aspect of the present invention, there is provided the package manufacturing method according to the first aspect, wherein the opening concave portion of the metal cap has a rectangular opening shape.

Therefore, in this case, in particular, if the opening concave portion of the metal cap formed by drawing has a rectangular opening shape, generally, the finishing accuracy of parts is reduced, and the thickness of the flange portion of the metal cap is reduced. Although the corner part and the straight part differ greatly, before the resistance welding, the flange part is made uniform in thickness over the entire circumference in advance, so that it is securely and airtightly welded without any trouble, and the optimal effective package manufacturing Be the law.

According to a third aspect of the present invention, there is provided the package manufacturing method according to the first or second aspect, wherein one of the press-contact surfaces of the flange portion of the metal cap and the peripheral edge portion of the metal base is provided. A projection is formed over the circumference, and the flange and the peripheral edge are pressed against each other via the projection.

Therefore, in this case, in particular, since the flange portion and the peripheral portion are resistance-welded in a state where they are pressed against each other via the projection, the current at the time of the resistance welding is concentrated on the same projection, and only the projection is melted. Thus, more reliable hermetic welding can be performed.

According to a fourth aspect of the present invention, there is provided a package manufacturing method as set forth in the third aspect, wherein the electrode abutment on the side opposite to the press contact surfaces of the flange portion of the metal cap and the peripheral portion of the metal base is provided. Pressing is performed so that a concave groove over the entire circumference is formed at the position corresponding to the projection on the surface to a uniform thickness, and the electrodes are brought into contact with the inner bottom surfaces of both concave grooves, and the same flange portion and peripheral portion are formed. Are pressed against each other.

Therefore, in this case, in particular, since the concave portion is formed on the electrode contact surface on the side opposite to the projection of each of the flange portion of the metal cap and the peripheral portion of the metal base, a uniform thickness can be obtained by each press working. Therefore, at this time, the height of the projection is not required and the height of the projection is not required, and the thickness of the sheet can be easily made uniform on the opposite side of the projection. Moreover, the flange portion of the metal cap and the peripheral edge portion of the metal base are each formed with a concave groove over the entire circumference, so that it is difficult to bend and deform, and the projection is pressed against the opposing surface with a uniform pressing force without a gap. In addition, easier and more reliable airtight welding can be performed.

A package manufacturing method according to a fifth aspect of the present invention is the package manufacturing method according to the fourth aspect, wherein a contact electrode is protruded from the base electrode, and the contact electrode is exchangeably coupled to the base electrode. Thus, an electrode is formed, and the contact electrode is brought into contact with the inner bottom surface of the concave groove.

Therefore, in this case, in particular, since the contact electrode contacting the inner bottom surface of the concave groove is exchangeably connected to the base electrode, it is only necessary to replace the contact electrode when the electrode is worn. In addition, the cost of the electrode can be reduced.

According to a sixth aspect of the present invention, in the package manufacturing method of the fourth aspect, a contact electrode portion having a trapezoidal cross section is formed on the base electrode portion to form an electrode. The groove is formed to have an inverted trapezoidal cross section so as to fit the electrode portion, and the contact electrode portion is brought into contact with the inner bottom surface of the groove.

Therefore, in this case, in particular, by forming a contact electrode portion protruding from the base electrode portion to form an electrode, and forming the concave groove into an inverted trapezoidal shape in which the groove width becomes narrower toward the bottom. Since the contact electrode portion in contact with the inner bottom surface of the concave groove has a trapezoidal cross section, heat generated in the contact electrode portion is easily radiated to the base electrode portion side, and heat generated in the component contact portion is generated. Is suppressed, the rigidity of the contact electrode portion serving as the part contact portion is also improved, and the electrode has a long life.

According to a seventh aspect of the present invention, there is provided the package manufacturing method according to the fourth aspect of the present invention, wherein the pressing is performed so that the outer side of the concave groove has a stepped shape, and a uniform thickness and a uniform thickness are obtained. It is characterized by doing.

Therefore, in this case, in particular, since the outside of the concave groove has a stepped shape, the electrode contacting the inner bottom surface of the concave groove should be a wide electrode extending to the outside of the concave groove. This makes it possible to use the electrode, thereby increasing the contact area of the component, improving the heat dissipation at the contact portion of the component and the rigidity of the electrode, and extending the life of the electrode.

The package manufacturing method according to claim 8 of the present invention is the same as the package manufacturing method according to claim 3, wherein each of the press contact surfaces of the flange portion of the metal cap and the peripheral portion of the metal base is provided at a position corresponding to the projection. Pressing is performed so as to form a concave groove over the circumference to have a uniform thickness. At this time, on the press-contact surface where the projection is formed, grooves are formed on both sides of the projection while maintaining the projection at a predetermined height. The projection is pressed against the inner bottom surface of the concave groove of the opposing press contact surface, and the electrodes are brought into contact with both electrode contact surfaces opposite to the both press contact surfaces, so that the flange portion and the peripheral edge portion are pressed against each other. It is characterized by having

Therefore, in this case, in particular, since a groove is formed on each of the press-contact surfaces of the flange portion of the metal cap and the peripheral portion of the metal base opposite to the electrode contact surface, uniform pressing is performed by each press working. Because of the thickness, both electrode contact surfaces can be kept flat and the electrode part contact part can be formed wide and flat, thereby increasing the part contact area and heat radiation at the part contact part. The electrode and the rigidity and abrasion resistance of the electrode are also improved, and a long life of the electrode is achieved.
It is not necessary to process the tip of the electrode, which is a contact part of the electrode, and the cost of the electrode can be reduced.

Further, the flange portion of the metal cap and the peripheral edge portion of the metal base are hardly warped and deformed due to the formation of a concave groove over the entire circumference. The projection becomes the correct height by the correction height control, and the projection is pressed against the inner bottom surface of the concave groove of the opposing pressing surface with a uniform pressing force without any gap, so that more reliable airtight welding can be performed.

[0028]

DETAILED DESCRIPTION OF THE INVENTION FIGS.
4 shows an embodiment corresponding to FIG. In the package manufacturing method of this embodiment, the flange portion 2 of the metal cap 3 formed by drawing and having the opening concave portion 1 and the flange portion 2 around the concave portion 1 and the peripheral edge portion 5 of the metal base 4 are paired. In a package manufacturing method in which resistance welding is performed in a state of being sandwiched by the electrodes 6 and pressed against each other, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are partially pressed all around and uniformly pressed. After that, resistance welding is performed after the thickness is reduced.

In the package manufacturing method of this embodiment, as shown in FIG. 2, the opening concave portion 1 of the metal cap 3 has a rectangular opening shape, and the projection 7 covering the entire periphery is formed on the press-contact surface of the peripheral portion 5 of the metal base 4. The flange portion 2 and the peripheral edge portion 5 are pressed against each other via the projection 7. Although the projection 7 is formed on the pressure contact surface on the metal base 4 side, the projection 7 may be formed on the metal cap 3 side on the pressure contact surface of the flange portion 2.

Further, in this case, as shown in FIGS. 1 and 3, the projections 7 correspond to the electrode contact surfaces of the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 which are opposite to the respective pressure contact surfaces. Pressing is performed so as to form a concave groove 8 over the entire circumference at each position to obtain a uniform thickness.
The electrode 6 is brought into contact with the inner bottom surface of each of the flanges 2 to press the flange portion 2 and the peripheral edge portion 5 with each other.

As shown in FIG. 4, the metal base 4 is formed by airtight brazing of a rectangular frame 17 having a projection 7 made of 42 alloy, Kovar or the like, and a rectangular plate 18 made of ceramics such as alumina. It is formed by being combined.
Relay components such as an electromagnetic coil 19 and a contact 20 are installed on the metal base 4, and the metal cap 3 is hermetically welded to the metal base 4. The metal cap 3 has a rectangular box shape and is formed by drawing and pressing a metal plate such as stainless steel. In this case, the flange 2 is integrally formed around the opening concave portion 1. As described above, the metal cap 3 is hermetically welded to the metal base 4 to manufacture a package in which relay parts such as the electromagnetic coil 19 and the contact 20 are housed as shown in FIG.

When airtight welding is performed, the flange 2 of the metal cap 3 and the rectangular frame 17 which is the edge 5 of the metal base 4 are held between the upper and lower electrodes 6 as shown in FIGS. The electrodes are sandwiched and pressed against each other, and resistance welding is performed by passing electricity between the electrodes 6 in the pressurized state. At this time, rectangular recesses are formed in the end surfaces of both electrodes 6, and portions other than the flange portion 2 of the rectangular plate 18 and the metal cap 3 in which the terminals on the metal base 4 side protrude are formed in the recesses. Is accommodated.
In this case, the pressing force is 2000 kgf, and as shown in FIG.
The current Ip is 80 kA and the time tp is 20 ms.

In the package manufacturing method of the embodiment, as a first step, the flange portion 2 of the metal cap 3 and the metal base 4 are formed by performing partial pressing.
The thickness of only the edge portion 5 is made uniform over the entire circumference. That is, as shown on the upper left side of FIG. 1, a die (die) 13 having a flat surface is brought into contact with the press-contact surface of the flange portion 2 of the metal cap 3, and the die (punch) is brought into contact with the electrode contact surface of the flange portion 2. ) 14 is abutted. In this case, the mold (punch) 14 has a ridge 15 projecting annularly along the position of the projection 7.
A groove 8 is formed on the electrode contact surface of the flange 2 by the ridge 15.

On the other hand, as shown in the upper right part of FIG. 1, a mold (die) 13 is brought into contact with the press-contact surface of the edge 5 of the metal base 4 on which the projection 7 is formed. )
A groove 16 having a shape adapted to the projection 7 is formed on the projection 13, and the projection 7 is brought into contact with the groove 16 in a state in which the projection 7 is accommodated. The mold (punch) 14 is brought into contact. In this case, a convex line 15 projecting annularly along the position of the projection 7 is formed on the mold (punch) 14, and the concave line 8 is formed on the electrode contact surface of the edge 5 by the convex line 15. Is done.

Next, as a second step, as shown in the lower part of FIG. 1, the electrode 6 is brought into contact with the part subjected to the partial press working to apply a pressure and to uniformly contact the entire periphery of the welded part of the part. Resistance welding is performed in this state. In this case, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are resistance-welded in a state of being sandwiched between the pair of electrodes 6 and pressed against each other. The electrode 6 is in contact with the inner bottom surface, and the flange portion 2 and the peripheral edge portion 5 are pressed against each other. Further, here, the contact electrode portion 12 is formed by projecting from the base electrode portion 11 to form the electrode 6. The flat top surface of the contact electrode portion 12 is stably formed on the flat inner bottom surface of the groove 8. It is securely contacted.

Therefore, in the package manufacturing method of this embodiment, even if the plate thickness of the parts of the metal cap 3 and the metal base 4 which are press-formed have variations,
Before the resistance welding, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are partially press-worked over the entire circumference to have a uniform thickness. And the periphery 5 are sandwiched between the pair of electrodes 6 and resistance-welded in a state where they are pressed against each other.
During pressurization, the welded portion between the flange portion 2 and the peripheral edge portion 5 comes into uniform contact over the entire circumference, and is securely hermetically welded, so that a highly reliable package without welding defects can be obtained.

Therefore, unlike the conventional improved technique shown in FIG. 18, the groove S of the electrode 6 is not made to have a complicated shape, and even if the electrode 6 having a simple shape is used, the hermetic welding with high welding quality is achieved. Becomes possible. If the opening concave portion 1 of the metal cap 3 formed by drawing has a rectangular opening shape, generally, the accuracy of part finish is reduced, and the thickness of the flange portion 2 of the metal cap 3 is reduced to the corner portion ( BB in FIG.
Although there is a great difference between the straight portion (shown in cross section) and the straight portion (shown in AA cross section in FIG. 3), the flange portion 2 is made uniform in thickness over the entire circumference before resistance welding. In this way, the package is securely and hermetically welded without any trouble, so that an optimal and effective package manufacturing method is obtained.

In this case, the metal cap 3 is formed by drawing press working, and the peripheral portion 5 and the projection 7 of the metal base 4 are also formed by press working.
As shown in FIG. 3, the flange portion 2 of the metal cap 3 and the peripheral portion 5 of the metal base 4 become thicker at the corner portion (FIG. 3).
In the straight portion, the flange portion 2 and the peripheral edge portion 5 are thinned (shown in the AA cross section in FIG. 3). Be uniformed. Since the flange portion 2 and the peripheral edge portion 5 are resistance-welded in a state where they are pressed against each other via the projection 7, the current during the resistance welding is concentrated on the projection 7, so that only the projection 7 is melted. Thus, more reliable hermetic welding can be performed.

Further, in the package manufacturing method of this embodiment, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are formed with a concave groove 8 on the electrode contact surface opposite to the projection 7. By doing so, each of the projections 7 is made to have a uniform thickness, and in that case, the projection 7 is left as it is, and height management that takes into account the contact condition is not necessary. Pressing is performed so that the vicinity becomes partially groove-shaped, and the plate thickness can be easily made uniform without any trouble. In addition, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are hardly deformed due to the formation of the concave groove 8 over the entire circumference, and the projection 7 applies a uniform pressing force to the opposing press contact surface. Therefore, pressure welding can be performed without any gap, so that easy and reliable hermetic welding can be performed.

FIG. 9 shows another embodiment corresponding to claims 1 to 5 of the present invention. In the package manufacturing method of this embodiment, a contact electrode 10 is protruded from a base electrode 9 and By forming the electrode 6 by exchanging the base electrode 9 with the base electrode 9, the contact electrode 10 is brought into contact with the inner bottom surface of the concave groove 8. In this case, both base electrodes 9 are grooved at positions opposed to the concave grooves 8 formed on the flange portion 2 of the metal cap 3 and the edge portion 5 of the metal base 4 to form annular grooves 21. Contact electrode in each groove 21
Both electrodes 6 are formed by inserting and fitting 10.

Therefore, in the package manufacturing method of this embodiment, the contact electrode 10 abutting on the inner bottom surface of the concave groove 8
Are exchangeably connected to the base electrode 9, so that when the electrodes are consumed, only the contact electrodes 10 need to be replaced, and the cost of the electrodes 6 can be reduced. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 8, and the same operation and effect as in the above embodiment are exerted.

FIG. 10 shows still another embodiment corresponding to claims 1 to 5 of the present invention. In the package manufacturing method of this embodiment, the contact electrode 10 of the electrode 6 can be replaced with the base electrode 9. When they are joined to each other, they are joined not by fitting but by joining such as brazing. Except for this, the configuration is the same as that of the embodiment shown in FIG. 9, and the same operation and effect as those of the above-described embodiment are exerted. or,
When the base electrode 9 of the electrode 6 and the contact electrode 10 are separate from each other as in this embodiment and the embodiment shown in FIG.
There are the following advantages.

That is, by forming the contact electrode 10 with a material having a higher hardness than the base electrode 9, the wear resistance of the electrode 6 is improved and the life of the electrode 6 is extended. For example, when the material of the base electrode 9 is chromium copper (CrCu) [hardness Hv150], the material of the contact electrode 10 is beryllium copper (Be
Cu) [hardness Hv 230], alumina dispersed copper [hardness Hv 18
0], copper-tungsten alloy (Cu-W) [hardness Hv20
0], silver-tungsten alloy (Ag-W) [hardness Hv20
0], tungsten (W) [hardness Hv 360] or the like.

Further, since the contact electrode 10 is formed of a material having higher thermal conductivity than the base electrode 9, heat generation of the electrode 6 is suppressed and the life of the electrode 6 is extended. For example, when the material of the base electrode 9 is chromium copper (CrCu) [conductivity IAGS% 75 to 80], the material of the contact electrode 10 is silver-copper alloy (Ag-Cu) [conductivity IAGS% 90 ], Tough pitch copper [conductivity IAGS% 97] or the like.

Furthermore, by forming the contact electrode 10 with a material having a higher melting point than the base electrode 9, the heat resistance of the electrode 6 is improved and the life of the electrode 6 is extended. For example, the base electrode 9
When the material of the contact electrode 10 is chromium copper (CrCu) [melting point 1083 ° C.], the material of the contact electrode 10 is molybdenum (Mo).
[Melting point 2630 ° C], tungsten (W) [melting point 360]
0 ° C.] and the like.

FIG. 11 shows still another embodiment corresponding to claims 1 to 4 and 6 of the present invention. In the package manufacturing method of this embodiment, a contact electrode section having a trapezoidal cross section is formed on a base electrode section 11. The electrode 6 is formed by projecting the contact electrode portion 12.
The groove 2 of the flange portion 2 of the metal cap 3 and the edge 5 of the metal base 4 are formed in an inverted trapezoidal cross section so that the contact electrode portion 12 contacts the inner bottom surface of each groove 8. I try to make it.

Therefore, in the package manufacturing method of this embodiment, the electrode 6 is formed by protruding the contact electrode portion 12 from the base electrode portion 11, and the groove width becomes narrower toward the bottom of the groove 8. By forming the inverted trapezoidal shape, the contact electrode portion 12 contacting the inner bottom surface of the concave groove 8 has a trapezoidal cross section,
The heat generated in the contact electrode portion 12 is easily radiated to the base electrode portion 11 side, heat generation in the component contact portion is suppressed, and the rigidity of the contact electrode portion 12 serving as the component contact portion is also improved. , The electrode 6 has a long life. Other than that,
The configuration is the same as that of the embodiment shown in FIGS. 1 to 8, and the same operation and effect as in the above embodiment are exerted.

FIG. 12 shows still another embodiment corresponding to claims 1 to 4 of the present invention. In the package manufacturing method of this embodiment, the electrodes 6 are cooled by cooling means. In this case, a water channel 22 as a cooling means is formed in the base electrode portion 11 of the electrode 6, and the base electrode portion 11 is water-cooled by passing water through the water channel 22. Therefore, the heat generated in the contact electrode section 12 is easily radiated to the base electrode section 11 side, and the heat generation in the contact portion of the component is suppressed, and the life of the electrode 6 is extended. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 8, and the same operation and effect as in the above embodiment are exerted.

FIG. 13 shows still another embodiment corresponding to claims 1 to 4 and 7 of the present invention. In the package manufacturing method of this embodiment, the flange portion 2 of the metal cap 3 and the metal base 4 are formed. Pressing is performed so as to have a uniform thickness so that the outside of the concave groove 8 formed in the edge 5 has an open stepped shape. In this case, as shown on the upper left side of FIG. 13, a projection (step) 23 is formed on the mold (punch) 14 which comes into contact with the electrode contact surface of the flange portion 2 and projects annularly along the position of the projection 7. The convex step 23 forms a flat step-shaped concave groove 8 which is opened outward on the electrode contact surface of the flange portion 2.

As shown in the upper right part of FIG. 13, a die (punch) to be brought into contact with the electrode contact surface of the edge 5 of the metal base 4.
14 is also formed with a convex step 23 similar to that described above.
As a result, a step-shaped concave groove 8 which is opened outward is formed on the electrode contact surface of the same edge portion 5 as described above. Then, as shown in the lower part of FIG. 13, when resistance welding is performed, the flat top surface of the contact electrode portion 12 reaching the outer end of the electrode 6 is flattened by the step-shaped concave groove 8 which is opened outward. Stably and reliably abuts the inner bottom surface with a large contact area.

Therefore, in the package manufacturing method of this embodiment, since the outside of the groove 8 has a stepped shape with the outside open, the contact electrode portion 12 of the electrode 6 contacting the inner bottom surface of the groove 8 is formed. It may be wide enough to extend to the outside of the concave groove 8, whereby the contact area of the component is increased, the heat radiation at the contact portion of the component and the rigidity of the electrode 6 are improved. 6 is achieved. Other than that,
The configuration is the same as that of the embodiment shown in FIGS. 1 to 8, and the same operation and effect as in the above embodiment are exerted.

FIG. 14 shows still another embodiment corresponding to the first to third and eighth aspects of the present invention. In the package manufacturing method of this embodiment, the flange portion 2 of the metal cap 3 and the metal base 4 are formed. Pressing is applied to each press-contact surface of the peripheral portion 5 so as to form a concave groove 8 over the entire circumference at a position corresponding to the projection 7 to have a uniform thickness. At this time, on the press contact surface where the projection 7 is formed, the projection 7 is formed at a predetermined height, and the concave grooves 8 are formed on both sides of the projection 7. When resistance welding is performed, the projection 7 is pressed against the inner bottom surface of the concave groove 8 of the opposing press contact surface, and the electrodes 6 are respectively brought into contact with both electrode contact surfaces opposite to the both press contact surfaces. The flange 2 and the peripheral edge 5 are pressed against each other.

In this case, first, as shown on the upper left side of FIG. 14, a mold (die) 13 having a flat surface is brought into contact with the electrode contact surface of the flange portion 2 of the metal cap 3, and the flange portion 2 is pressed. A mold (punch) 14 is brought into contact with the surface. here,
The mold (punch) 14 is formed with a ridge 15 projecting annularly along the position of the projection 7, and the ridge 15 forms a concave groove 8 on the press-contact surface of the flange portion 2.

On the other hand, as shown in the upper right part of FIG. 14, a metal mold (die) 13 having a flat surface shape is brought into contact with the electrode contact surface of the edge 5 of the metal base 4, and the pressure contact surface of the edge 5 is formed. A mold (punch) 14 is brought into contact with the mold. At this time, a groove 16 having a shape conforming to the projection 7 is formed in the mold (punch) 14, and the projection 7 is brought into contact with the groove 16 while the projection 7 is housed. In addition, a ridge 15 projecting annularly along both sides of the groove 16 is formed on the mold (punch) 14.
Due to the double ridges 15, concave grooves 8 are formed on both sides of the projection 7 on the press contact surface of the edge 5.

Next, as shown in the lower part of FIG. 14, when performing resistance welding, the projection 7 formed on the press-contact surface of the edge 5 of the metal base 4 is attached to the flange 2 of the metal cap 3. The flat electrode 6 is brought into contact with the inner bottom surface of the concave groove 8 formed on the press contact surface, and the flat electrodes 6 are brought into contact with the two electrode contact surfaces opposite to the both press contact surfaces, respectively. Are pressed against each other. In this case, the height c of the projection 7 is calculated from the sum of the depth a of the groove 8 in the flange portion 2 of the metal cap 3 and the depth b of the groove 8 in the edge 5 of the metal base 4. (A + b <c), and therefore, the height of the ridge 15 and the depth of the groove 16 of the die (punch) 14 are appropriately set to predetermined values.

Therefore, in the package manufacturing method of this embodiment, the groove 2 is formed on the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 on the press contact surface opposite to the electrode contact surface. By doing so, each of them is made to have a uniform thickness by press working, so that the parts contacting parts of the electrode 6 can have a wide and flat simple shape while the contact surfaces of both electrodes remain flat. As a result, the contact area of the component is increased, the heat dissipation at the contact portion of the component, the rigidity and wear resistance of the electrode 6 are improved, and the life of the electrode 6 is extended. In addition, it is not necessary to process the tip of the electrode 6 which is a part contacting the part, and the cost of the electrode 6 can be reduced.

Further, the flange portion 2 of the metal cap 3 and the peripheral edge portion 5 of the metal base 4 are hardly warped and deformed due to the formation of the concave groove 8 extending over the entire circumference. Since the projection 7 is formed again so that the projection 7 has the correct height by the correction height control, the projection 7 is pressed against the inner bottom surface of the concave groove 8 of the opposing pressing surface with a uniform pressing force without a gap. As a result, more reliable hermetic welding can be performed. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 8, and the same operation and effect as in the above embodiment are exerted.

[0058]

As described above, in the package manufacturing method according to the first aspect of the present invention, even if the metal cap or the metal base component has a thickness distribution, the flange portion and the peripheral edge portion are subjected to resistance welding. Is uniformly contacted over the entire circumference, and highly reliable hermetic welding without welding defects can be achieved.

In the package manufacturing method according to the second aspect of the present invention, in particular, when the opening concave portion of the metal cap has a rectangular opening shape, the thickness of the flange portion greatly differs between the corner portion and the straight portion. Will be
The flange portion has a uniform thickness in advance over the entire circumference, and is securely and airtightly welded without any trouble to be optimally effective.

Further, in the package manufacturing method according to the third aspect of the present invention, particularly, the flange portion and the peripheral edge portion are resistance-welded in a state where they are pressed against each other via projection, and the current at the time of the resistance welding is subjected to the projection. And only the projection is melted to perform more reliable hermetic welding.

Further, in the package manufacturing method according to the fourth aspect of the present invention, particularly, the height of the projection is not required to be controlled at the time of press working, and the plate thickness can be easily made uniform without any trouble on the opposite side of the projection. By forming the concave groove, warpage deformation is also prevented, and the projection is pressed against the opposing surface with a uniform pressing force without a gap, so that easy and reliable hermetic welding can be performed.

In the package manufacturing method according to the fifth aspect of the present invention, in particular, the contact electrode is exchangeably connected to the base electrode, and when the electrode is worn, only the contact electrode needs to be exchanged. The cost of the electrode can be reduced.

In the package manufacturing method according to the sixth aspect of the present invention, in particular, the contact electrode portion has a trapezoidal cross section, heat generation at the part contacting the parts is suppressed, rigidity is improved, and Long life.

Further, in the package manufacturing method according to the present invention, not only is it unnecessary to control the height of the projection, but also by using an electrode having a wide part contact part as the electrode. The heat dissipation and rigidity at the part contacting the parts are improved, and the electrode has a long life.

In the package manufacturing method according to the eighth aspect of the present invention, in particular, the electrode contact surfaces on the flange portion of the metal cap and the peripheral portion of the metal base are flattened, so that the component contact area of the electrode is reduced. The heat dissipation, rigidity, and abrasion resistance at the part contacting parts are also improved, the life of the electrode is extended, and the cost of the electrode which does not need to be processed at the tip can be reduced. In addition, the projection has an accurate height, and the concave groove is formed to prevent warping deformation. The projection is pressed against the inner bottom surface of the concave groove of the opposing pressing surface with a uniform pressing force without any gap, and furthermore, Reliable hermetic welding can be performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing main steps of a package manufacturing method according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a main configuration of the package manufacturing method.

FIG. 3 is a cross-sectional view showing main steps of the package manufacturing method (AA cross section and BB cross section in FIG. 2 are each part in FIG. 2).

FIG. 4 is a perspective view showing the whole process of the package manufacturing method.

FIG. 5 is a sectional view taken along line XX in FIG. 4;

FIG. 6 is a perspective view showing main steps of the package manufacturing method.

FIG. 7 is a sectional view showing a welding state in the package manufacturing method.

FIG. 8 is a graph showing the relationship between current and time during welding in the package manufacturing method.

FIG. 9 is a cross-sectional view illustrating a main part configuration of a package manufacturing method according to another embodiment.

FIG. 10 is a cross-sectional view showing a main part configuration of a package manufacturing method according to still another embodiment.

FIG. 11 is a cross-sectional view showing a main part configuration of a package manufacturing method according to still another embodiment.

FIG. 12 is a cross-sectional view showing a main part configuration of a package manufacturing method according to still another embodiment.

FIG. 13 is a sectional view showing main steps of a package manufacturing method according to still another embodiment.

FIG. 14 is a sectional view showing main steps of a package manufacturing method according to yet another embodiment.

FIG. 15 is a perspective view showing main steps of a conventional package manufacturing method.

FIG. 16 shows a welding state of the package manufacturing method,
(A) is a side view, (b) is a YY sectional view in (a).

FIG. 17 is a sectional view showing main steps of the package manufacturing method.

FIG. 18 is a schematic plan view showing a main configuration of a package manufacturing method which is a conventional improvement technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening concave part 2 Flange part 3 Metal cap 4 Metal base 5 Peripheral part 6 Electrode 7 Projection 8 Depression groove 9 Base electrode 10 Contact electrode 11 Base electrode part 12 Contact electrode part

Claims (8)

[Claims] 1. A metal cap formed by drawing and having an opening concave portion and a flange portion around the same, and the flange portion of the metal base and the peripheral portion of the metal base are sandwiched between a pair of electrodes and pressed against each other. In a package manufacturing method of performing resistance welding in a state, a package is characterized in that a flange portion of a metal cap and a peripheral portion of a metal base are partially press-worked over the entire circumference to have a uniform thickness, and then resistance welding is performed. Manufacturing method. 2. The method of manufacturing a package according to claim 1, wherein the opening concave portion of the metal cap has a rectangular opening shape. 3. A projection over the entire circumference is formed on one of the pressure contact surfaces of the flange portion of the metal cap and the peripheral portion of the metal base, and the flange portion and the peripheral portion are pressed against each other via the projection. 3. The method according to claim 1, wherein the package is manufactured. 4. Press processing is performed so that a concave groove extending over the entire circumference is formed at a position corresponding to the projection on the electrode contact surface opposite to the press contact surface of the flange portion of the metal cap and the peripheral edge portion of the metal base. 4. The package manufacturing method according to claim 3, wherein the electrodes are brought into uniform thickness by contacting the electrodes with the inner bottom surfaces of the two concave grooves so that the flange portion and the peripheral edge portion are pressed against each other. 5. A contact electrode protruding from a base electrode, the contact electrode is exchangeably coupled to the base electrode to form an electrode, and the contact electrode is brought into contact with the inner bottom surface of the groove. 5. The method according to claim 4, wherein the method is performed. 6. An electrode is formed by protruding a contact electrode portion having a trapezoidal cross section from the base electrode portion, and forming a concave groove having an inverted trapezoidal cross section so as to fit the contact electrode portion. 5. The package manufacturing method according to claim 4, wherein the contact electrode portion is brought into contact with the bottom surface. 7. The method of manufacturing a package according to claim 4, wherein a uniform thickness is obtained by performing a press working so as to form a step having an open outside of the concave groove. 8. Press processing is performed on each press-contact surface of the flange portion of the metal cap and the peripheral edge portion of the metal base so as to form a concave groove over the entire circumference at a position corresponding to the projection, to obtain a uniform thickness. On the press-contact surface where the projection is formed, while forming the projection at a predetermined height, a concave groove is formed on both sides of the projection,
The projection is brought into pressure contact with the inner bottom surface of the concave groove of the opposing press contact surface, and the electrodes are brought into contact with the two electrode contact surfaces opposite to the two press contact surfaces so that the flange portion and the peripheral edge portion are pressed against each other. 4. The package manufacturing method according to claim 3, wherein: