JP2001179460A - Package manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package manufacturing method capable of welding a whole periphery of a metal cap in uniform airtightness and having high reliability without a welding defect. SOLUTION: In a package manufacturing method by which a flange part 2 of a metal cap 3 having the flange part to a square opening 1 formed by drawing is pressure-contacted to a peripheral surface of a metal base 4 and then subjected to resistance welding, the partial toughness at the section corresponding to an opening square part 1a is made smaller than the that at the section corresponding to an opening straight part 1b, after the flange part 2 of the metal cap 3 is pressure-contacted to a peripheral surface of a metal base 4 or a corner part 1a and then is subjected to resistance welding, the straight section 1b is 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 FIG. 27, a flange portion 2 of a metal cap 3 having a flange portion 2 in a rectangular opening 1 is pressed against the peripheral surface of a metal base 4 and resistance-welded to form a relay inside. A package manufacturing method for manufacturing a package containing components is known. In this case, FIG.
As shown in (a), the flange portion 2 of the metal cap 3 and the peripheral portion of the metal base 4 are sandwiched between the upper and lower electrodes 9 and pressed against each other, and electricity flows between the two electrodes 9 in the pressurized state. Resistance welding. At that time, FIG.
As shown in (b), a rectangular groove S is formed in the end surface of both electrodes 9, and the terminal other than the flange portion 2 of the metal cap 4 and the terminal on the metal base 4 are accommodated in the groove S. You.

However, in the above case, when the metal cap 3 is formed by drawing, as shown in FIG. 29, a portion (four corners) corresponding to the opening corner 1a of the rectangular opening 1 is formed by the flange portion 2. The thickness of the plate is increased, and the contact gap G (between the electrode 9 and the flange portion 2) at the portion (four straight portions) corresponding to the opening linear portion 1b of the rectangular opening 1 when the electrode 9 is pressed. Gap) easily occurs, and especially when the package is large in size, the contact gap G is large. Then, when performing resistance welding by press-contacting via the projection 6, pressure concentrates to crush the projection 6 at four corners, and the four corners serve as stoppers, and the other four straight parts are sufficient. To be pressurized. Therefore, there is a problem that welding is performed only at the four corners, and poor welding is likely to occur at the other four straight parts.

Therefore, conventionally, Japanese Patent Publication No. 5-61
In some cases, an encapsulated electrode as disclosed in Japanese Patent Publication No. 030 is used. In this case, as shown in FIG. 30, the opening edge of the corner i of the groove S provided in the electrode 9 and the opening edge of the central part j on the long side does not come into contact with the flange 2 of the metal cap 3 or the peripheral edge of the metal base 4. A non-contact portion k is formed. Therefore, sufficient pressurization is performed at portions other than the non-contact portion k, and poor welding at the contact gap G (gap) is prevented.

[0005]

However, in the technique disclosed in Japanese Patent Publication No. Hei 5-61030, the groove S of the electrode 9 is formed in a complicated shape.
Since the rigidity of the electrode 9 is small, the electrode 9 cannot receive the pressing force uniformly, and there is a problem that the life of the electrode 9 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 an object thereof is to provide a uniform airtight welding around a rectangular opening of a metal cap and to provide a reliable welding without defective welding. It is an object of the present invention to provide a package manufacturing method capable of obtaining a highly reliable package.

[0007]

According to a first aspect of the present invention, there is provided a package manufacturing method, wherein a metal cap formed by drawing and having a flange at a rectangular opening is pressed against a peripheral surface of a metal base. In the package manufacturing method of resistance welding, the rigidity of parts at the part corresponding to the corner of the opening is made smaller than the rigidity of parts at the part corresponding to the straight part of the opening, and the flange part of the metal cap is Is pressed against.

Therefore, in this case, the rigidity of the part at the part (corner part) corresponding to the opening corner is smaller than the rigidity of the part at the part (straight part) corresponding to the straight part of the opening. Since the corners are easier to deform than the straight parts, the gap between the parts at the time of contact caused by the thickening of the flange part of the metal cap formed by drawing at the corners disappears, and the welding part at the time of pressing Is pressed uniformly over the entire circumference. And even during welding, the corners do not act as stoppers, uniform pressure is applied to the entire circumference of the welded part, uniform airtight welding is performed around the square opening of the metal cap, and a highly reliable package without welding defects Can be obtained.
Therefore, airtight welding with high welding quality can be performed even if an electrode having a simple shape having a rectangular groove is used without making the groove of the electrode complicated as in the related art.

According to a second aspect of the present invention, there is provided a package manufacturing method according to the first aspect, wherein a projection is formed on a press-contact surface to be resistance-welded, and a projection shape of the projection is changed. The present invention is characterized in that the rigidity of the part at the portion corresponding to the opening corner is smaller than the rigidity of the part at the portion corresponding to the linear opening.

Therefore, in this case, especially when the rigidity of the component at the portion corresponding to the opening corner portion is made smaller than the rigidity of the component at the portion corresponding to the straight opening portion, the projection formed on the press-contact surface to be resistance-welded. The projection shape is changed, and the projection is easily crushed at the corners, so even if the thickness of the flange portion of the metal cap is large at the corners, the welded portion is uniform over the entire circumference when pressed. And uniform pressure is applied to the entire periphery of the welded part even during welding.

According to a third aspect of the present invention, there is provided the package manufacturing method according to the second aspect, wherein the projection tip angle at the portion corresponding to the opening corner is larger than that at the portion corresponding to the opening linear portion. It is characterized by being made smaller.

Therefore, in this case, particularly, the tip angle of the projection at the corner portion is smaller than that at the straight portion, and the projection has a lower rigidity at the corner portion, so that the projection is easily crushed at the corner portion, Even if the thickness of the flange portion of the metal cap is large at the same corner, the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and uniform pressurization is applied to the entire circumference of the welded portion even during welding.

According to a fourth aspect of the present invention, there is provided a package manufacturing method according to the second aspect, wherein the width of the tip of the projection at the portion corresponding to the opening corner is made smaller than the width at the portion corresponding to the opening linear portion. Is also reduced.

Therefore, in this case, particularly, the width of the tip of the projection at the corner portion is smaller than that at the straight portion, and the projection has a lower rigidity at the corner portion, so that the projection is easily crushed at the corner portion. Even if the thickness of the flange portion of the metal cap is large at the same corner portion, the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and
Even during welding, uniform pressure is applied to the entire circumference of the welded portion.

According to a fifth aspect of the present invention, there is provided the package manufacturing method according to the second aspect, wherein the height of the projection at the portion corresponding to the opening corner is made larger than that at the portion corresponding to the opening linear portion. Is also lowered.

Therefore, in this case, particularly, the height dimension of the projection at the corner portion is made lower than that at the straight portion, and the projection has a lower rigidity at the corner portion. Even if the dimensions are large at the corners, the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and the projection is easily crushed at the corners, so that uniform pressurization is applied to the entire circumference of the welded portion even during welding.

According to a sixth aspect of the present invention, in the package manufacturing method of the first aspect, a projection is formed on the press-contact surface to be resistance-welded, and the projection is formed at a portion corresponding to the opening corner. By making the hardness smaller than that of the portion corresponding to the opening linear portion, the component rigidity at the portion corresponding to the opening corner portion is made smaller than the component rigidity at the portion corresponding to the opening linear portion. It is.

Therefore, in this case, particularly when the component rigidity at the portion corresponding to the opening corner portion is made smaller than the component rigidity at the portion corresponding to the opening linear portion, a projection is formed on the press-contact surface to be resistance-welded. Since the projection has a reduced hardness at the corners and is easily crushed, even when the thickness of the flange portion of the metal cap is large at the same corners, the welded portion is pressed uniformly over the entire circumference at the time of pressurization. In addition, uniform pressure is applied to the entire periphery of the welded portion even during welding.

According to a seventh aspect of the present invention, there is provided the package manufacturing method according to the first aspect, wherein a projection is formed on the press-contact surface to be resistance-welded, and the press-contact surface at a position corresponding to the opening corner is formed. By forming a recess for pressure relief corresponding to the same projection on the back, the rigidity of the part corresponding to the corner of the opening is made smaller than the rigidity of the part corresponding to the straight part of the opening. It is a feature.

Therefore, in this case, particularly when the rigidity of the part at the portion corresponding to the opening corner is made smaller than the rigidity of the part at the portion corresponding to the straight opening, the projection is formed on the press-contact surface to be resistance-welded. A recess for pressure relief is formed behind the pressure contact surface at a position corresponding to the opening corner, corresponding to the projection. Therefore, when the material escapes to the concave portion at the corner portion when pressurized, the rigidity of the projection at the corner portion is reduced, and the projection is easily crushed at the corner portion, and the thickness of the metal cap flange portion is reduced. However, even if it is large in the same corner portion, the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and uniform pressurization is applied to the entire circumference of the welded portion even during welding.

According to an eighth aspect of the present invention, in the package manufacturing method of the first aspect, a projection is formed on a press-contact surface to be resistance-welded, and the projection is formed at a portion corresponding to an opening corner. By making the plate thickness dimension of the opposed portion smaller than that of the portion corresponding to the opening linear portion, the component rigidity at the portion corresponding to the opening corner portion is made smaller than the component rigidity at the portion corresponding to the opening linear portion. It is characterized by the following.

Therefore, in this case, especially when the component rigidity at the portion corresponding to the opening corner portion is made smaller than the component rigidity at the portion corresponding to the opening straight portion, the projection is formed on the press-contact surface to be resistance-welded. The thickness of the portion corresponding to the opening corner in the portion corresponding to the projection is made smaller than that in the portion corresponding to the opening linear portion. Therefore, the rigidity at the corner portion is reduced, the pressure for crushing the projection at the time of pressurizing is not concentrated at the corner portion, and even if the thickness of the flange portion of the metal cap is large at the corner portion, the welding is performed. The portion is pressed uniformly over the entire circumference, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

According to a ninth aspect of the present invention, there is provided the package manufacturing method according to the first aspect, wherein the flange portion of the metal cap or the peripheral portion of the metal base at the portion corresponding to the opening linear portion is pressed against the side. By forming an inclined warp and increasing the component rigidity at the portion corresponding to the opening linear portion, the component rigidity at the portion corresponding to the opening corner portion is made smaller than the component rigidity at the portion corresponding to the opening linear portion. Is also reduced.

Therefore, in this case, particularly when the rigidity of the component at the portion corresponding to the opening corner is made smaller than the rigidity of the component at the portion corresponding to the opening linear portion, the metal cap at the portion corresponding to the opening linear portion is particularly preferable. In the flange portion or the peripheral edge portion of the metal base, a warp inclined toward the press contact side is formed, and the rigidity of the part at a portion corresponding to the linear portion with the opening is increased. Therefore, the straight portion where the warp is formed is pressed first, and as a result, the pressure does not concentrate on the corner portion when pressurizing, and the thickness of the flange portion of the metal cap is large at the corner portion. However, the welded portion is pressed uniformly over the entire circumference, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

According to a tenth aspect of the present invention, there is provided a package manufacturing method for welding a flange portion of a metal cap formed by drawing and having a flange portion at a rectangular opening to a peripheral surface of a metal base. After performing pressure welding at a portion corresponding to the opening corner and performing resistance welding, welding is performed at a portion corresponding to the opening linear portion.

Therefore, in this case, the corner portion, which is easily welded by the metal cap formed by drawing, can be securely welded by first pressing the corner portion which is easily welded, and then the straight portion can be securely welded separately. A reliable hermetic welding can be performed around the rectangular opening of the metal cap, and a highly reliable package without welding defects can be obtained. Therefore, airtight welding with high welding quality can be performed even if an electrode having a simple shape having a rectangular groove is used without making the groove of the electrode complicated as in the related art.

According to a eleventh aspect of the present invention, in the package manufacturing method of the tenth aspect, energy beam welding is performed at a portion corresponding to the opening linear portion.

Therefore, in this case, particularly, the corner portion is pressed first and the resistance welding is reliably performed. At this time, even in the straight portion, there is no gap between the components and the components are in close contact with each other. Can be reliably welded later by the energy beam welding, and the quality of the energy beam welding is improved, and highly reliable airtight welding can be performed.

A package manufacturing method according to a twelfth aspect of the present invention is the package manufacturing method according to the tenth aspect, wherein pressure welding is performed even at a portion corresponding to the opening linear portion to perform resistance welding.

Therefore, in this case, particularly, the corner portion is pressed first and the resistance welding is surely performed. At this time, even in the straight portion, there is no gap between the components and the component is in a close contact state. The resulting straight portion can be pressure-welded later to reliably perform resistance welding, and highly reliable hermetic welding can be performed. In addition, both the preceding and succeeding steps become the same resistance welding, thereby increasing productivity.

According to a thirteenth aspect of the present invention, there is provided the package manufacturing method according to the twelfth aspect, wherein a portion corresponding to the opening corner portion is subjected to resistance welding by alternating current, and thereafter, a portion corresponding to the opening straight portion is formed. It is characterized in that resistance welding by direct current conduction is performed not only at the portion corresponding to the opening, but also at a portion corresponding to the opening corner.

Therefore, in this case, particularly, resistance welding is performed by alternating current with a low peak current at the corner portion,
At this time, even if it is only partially melted, there is no gap between the parts in the straight part, and the parts are in close contact with each other, so that the welded part is uniformly pressed over the entire circumference. Then, with uniform pressure applied to the entire circumference of the welded part, resistance welding by DC current with high peak current is performed at the corner part and the straight part, and reliable airtight welding around the square opening of the metal cap Done.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS.
3 shows an embodiment corresponding to FIG. In the package manufacturing method of this embodiment, as shown in FIG. 1, the flange portion 2 of the metal cap 3 formed by drawing and having the flange portion 2 in the rectangular opening 1 is pressed against the peripheral surface of the metal base 4. In the package manufacturing method of resistance welding, the rigidity of the part at the portion corresponding to the opening corner 1a is made smaller than the rigidity of the part at the portion corresponding to the opening straight portion 1b, and the flange portion 2 of the metal cap 3 is connected to the metal base 4. Is pressed against the surrounding surface.

In the package manufacturing method of this embodiment, as shown in FIG. 2, a projection 6 is formed on the press-contact surface 5 to be resistance-welded, and the projection shape of the projection 6 is changed so that the opening corner 1a is formed. The component rigidity at the corresponding portion is smaller than the component rigidity at the portion corresponding to the opening linear portion 1b. Although the projection 6 is formed on the press contact surface 5 on the metal base 4 side, the projection 6 can be formed on the press contact surface 5 on the flange portion 2 side of the metal cap 3. In this case, the opening corner 1a
The tip angle α of the projection 6 at the portion corresponding to the above is smaller than that at the portion corresponding to the opening linear portion 1b, and the tip width L of the projection 6 is constant here.

As shown in FIG. 3, the metal base 4 is formed by joining a rectangular frame 10 made of 42 alloy, Kovar or the like and a rectangular plate 11 made of ceramics such as alumina by airtight brazing. Relay parts such as an electromagnetic coil 12 and a contact 13 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 a metal plate made of stainless steel or the like. At this time, the flange portion 2 is formed integrally with the rectangular opening 1. As described above, the metal cap 3 is attached to the metal base 4.
Are hermetically welded and an electromagnetic coil is inserted inside as shown in FIG.
A package containing relay components such as 12 and contacts 13 is manufactured.

In the case of airtight welding, as shown in FIG. 5, the flange portion 2 of the metal cap 3 and the rectangular frame 10 at the periphery of the metal base 4 are sandwiched between the upper and lower electrodes 9. The electrodes 9 are pressed against each other, and electricity is passed between the electrodes 9 in the pressurized state, thereby performing resistance welding. At this time, rectangular recesses are formed in the end surfaces of both electrodes 9, and portions other than the flange portion 2 of the rectangular plate body 11 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 pressure is 2000 kgf, the current is 80 kA and the time is 20 ms as shown in FIG.

Therefore, in the package manufacturing method of this embodiment, the component rigidity at the portion (corner portion) corresponding to the opening corner 1a is greater than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. As shown in FIG. 7, since the corner portion (1a) is more easily deformed than the straight portion (1b) at the time of welding and pressurization, the flange portion 2 of the metal cap 3 formed by drawing is formed as shown in FIG. The gap between the parts at the time of contact caused by the increase in the thickness at the corner portion (1a) is eliminated, and the welded portion is pressed with a uniform contact pressure P over the entire circumference at the time of pressurization.

Further, even during welding, the corner portion (1a) does not function as a stopper, and a uniform pressurization (contact pressure P) is applied to the entire periphery of the welded portion, so that uniform airtight welding around the square opening 1 of the metal cap 3 is performed. As a result, a highly reliable relay package free from welding defects can be obtained. Therefore, it is possible to use a simple electrode 9 (having a high rigidity and a long life) having a rectangular concave portion without forming the groove S of the electrode 9 in a complicated shape as in the related art. Airtight welding with high welding quality can be performed.

In the package manufacturing method of the embodiment, when the component rigidity at the portion corresponding to the opening corner portion 1a is made smaller than the component rigidity at the portion corresponding to the opening linear portion 1b, resistance welding is performed. The projecting shape of the projection 6 formed on the press contact surface 5 is changed, and the projection 6 is easily crushed at the corner portion (1a). Therefore, even if the thickness of the flange portion 2 of the metal cap 3 is large at the same corner portion (1a), the welded portion is pressed uniformly over the entire periphery at the time of pressurization, and is uniform over the entire periphery of the welded portion even during welding. Pressure is applied.

In this case, the tip angle α of the projection 6 at the corner portion (1a) is smaller than that at the straight portion (1b).
Since the rigidity is reduced at the corner portion (1a), the projection 6 is easily crushed at the corner portion (1a), and even if the thickness of the flange portion 2 of the metal cap 3 is large at the corner portion (1a), At the time of pressurization, the welded portion is pressed uniformly over the entire circumference, and even during welding, uniform pressurization is applied to the entire circumference of the welded portion.

FIGS. 8 and 9 show an embodiment corresponding to the first, second and fourth aspects of the present invention. In the package manufacturing method of this embodiment, a portion (corner portion) corresponding to the opening corner 1a. The width L of the front end of the projection 6 is smaller than that at a portion (straight portion) corresponding to the opening linear portion 1b. In this case, as shown in FIG. 8B, the tip of the projection 6 at the corner (1a) is sharp, and the width of the tip is substantially zero.
The tip angle α of the projection 6 is constant.

Therefore, in the package manufacturing method of this embodiment, the width L of the tip of the projection 6 at the corner portion (1a) is smaller than that at the straight portion (1b), and the projection 6 is formed at the corner portion (1a). ), The projection 6 is easily crushed at the corner portion (1a). Even if the thickness of the flange portion 2 of the metal cap 3 is large at the corner portion (1a), the projection 6 is Is uniform contact pressure P over the entire circumference
And uniform pressure is applied to the entire periphery of the welded part even during welding. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7, and the same operation and effect as in the above embodiment are exerted.

FIG. 10 shows another embodiment corresponding to the first, second and fifth aspects of the present invention. According to the package manufacturing method of this embodiment, a portion (corner portion) corresponding to the opening corner 1a is provided. The height H of the projection 6 is made lower than that at a portion (straight portion) corresponding to the opening linear portion 1b. In this case, as a means for lowering the projection 6 at the corner portion (1a), after forming the projection 6, only the corner portion (1a) may be pressed or shaved off, or when the projection 6 is formed. Alternatively, the mold may be worked so that the projection 6 at the corner portion (1a) is formed low.

Therefore, in the package manufacturing method of this embodiment, the height H of the projection 6 at the corner portion (1a) is smaller than that at the straight portion (1b), and the projection 6 is formed at the corner portion (1b).
Since the rigidity is reduced in a), even if the thickness of the flange portion 2 of the metal cap 3 is large in the corner portion (1a), the welded portion is pressed with a uniform contact pressure P over the entire circumference when pressed, Further, the projection 6 is easily crushed at the corner portion (1a), and uniform pressure is applied to the entire periphery of the welded portion even during welding. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7, and the same operation and effect as in the above embodiment are exerted.

FIG. 11 shows still another embodiment corresponding to claims 1 and 6 of the present invention. In the package manufacturing method of this embodiment, a projection 6 is formed on a press-contact surface 5 to be resistance-welded. By making the hardness of the projection 6 at a portion (corner portion) corresponding to the opening corner 1a smaller than at a portion (straight portion) corresponding to the opening linear portion 1b, a portion (corner portion) corresponding to the opening corner 1a is formed. The rigidity of the part at ()) is smaller than the rigidity of the part at the part (straight part) corresponding to the opening linear part 1b. In this case, as a means for reducing the hardness of the projection 6 at the corner portion (1a), local annealing by laser irradiation or the like may be performed.

Therefore, in the package manufacturing method of this embodiment, the component rigidity at the portion (corner portion) corresponding to the opening corner 1a is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. When the size is reduced, a projection 6 is formed on the press-contact surface 5 to be resistance-welded, and the projection 6 has a reduced hardness at the corner portion (1a) and is easily crushed. Even when the thickness dimension is large at the same corner, the welding part has a uniform contact pressure P
And uniform pressure is applied to the entire periphery of the welded part even during welding. In contrast, if the hardness of the projection 6 is the same between the corner portion (1a) and the straight portion (1b), the contact pressure P increases at the corner portion (1a) during pressurization as shown in FIG. In addition, other than the above, FIGS.
7 and has the same functions and effects as in the above embodiment.

FIGS. 13 and 14 show still another embodiment corresponding to claims 1 and 7 of the present invention. In the package manufacturing method of this embodiment, a projection 6 is formed on a press-contact surface 5 to be resistance-welded. The pressure relief recess 7 corresponding to the projection 6 is formed behind the pressure contact surface 5 at a portion (corner portion) corresponding to the opening corner 1a, thereby forming a portion corresponding to the opening corner 1a. The component rigidity at the (corner portion) is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. In this case, a projection 6 is formed on the press-contact surface 5 on the metal base 4 side, and a groove-shaped recess 7 is formed on the back surface of the corner portion (1a) of the metal base 4 corresponding to the projection 6. .

Therefore, in the package manufacturing method of this embodiment, the component rigidity at the portion (corner portion) corresponding to the opening corner 1a is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. In order to reduce the size, a projection 6 is formed on the press-contact surface 5 to be resistance-welded, and a pressure relief recess corresponding to the projection 6 is provided behind the press-contact surface 5 at a portion (corner portion) corresponding to the opening corner 1a. A place 7 is formed. Therefore, when the material of the metal base 4 escapes into the recess 7 at the corner portion (1a) at the time of pressurization, the rigidity of the projection 6 at the corner portion (1a) decreases, and the projection 6
(1a) It becomes easy to be crushed and the flange 3 of the metal cap 3
Even if the plate thickness dimension is large at the same corner portion (1a), the welded portion is pressed with uniform contact pressure P over the entire circumference at the time of pressurization,
Moreover, even during welding, uniform pressure is applied to the entire periphery of the welded portion.
Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7, and the same operation and effect as in the above embodiment are exerted.

FIGS. 15 and 16 show still another embodiment corresponding to claims 1 and 7 of the present invention. In the package manufacturing method of this embodiment, the flange portion 2 of the metal cap 3 is used.
On the back surface (surface opposite to the welding surface), a groove-shaped recess 7 is formed corresponding to the projection 6 on the metal base 4 side. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 13 and 14, and the same operation and effect as in the above-described embodiment are exerted.

FIGS. 17 and 18 show still another embodiment corresponding to claims 1 and 8 of the present invention. In the package manufacturing method of this embodiment, a projection 6 is formed on a press-contact surface 5 to be resistance-welded. By making the plate thickness dimension T of a portion (corner portion) corresponding to the opening corner portion 1a facing the projection 6 smaller than that of a portion (straight portion) corresponding to the opening linear portion 1b, the opening angle is reduced. The component rigidity at the portion (corner portion) corresponding to the portion 1a is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. In this case, the metal cap 3
The thickness T of the flange portion 2 is reduced at the corner portion (1a).

Therefore, in the package manufacturing method of this embodiment, the component rigidity at the portion (corner portion) corresponding to the opening corner 1a is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. When making it smaller, a projection 6 is formed on the pressure-welded surface 5 to be resistance-welded, and a plate thickness dimension T of a portion (corner portion) corresponding to the opening corner portion 1a facing the projection 6 corresponds to the opening linear portion 1b. Is made smaller than in the part where it does (straight part). Therefore, the rigidity at the corner portion (1a) is reduced, and the pressure for crushing the projection 6 at the time of pressurizing is not concentrated at the corner portion (1a), and the projection 6 at the corner portion (1a) is originally collapsed. Difficult, the contact pressure P is equal between the corner portion (1a) and the straight portion (1b), and the welded portion is pressed uniformly over the entire circumference,
Moreover, even during welding, uniform pressure is applied to the entire periphery of the welded portion.
Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7, and the same operation and effect as in the above embodiment are exerted.

FIGS. 19 to 21 show still another embodiment corresponding to claims 1 and 9 of the present invention. In the package manufacturing method of this embodiment, a portion (straight portion) corresponding to the opening linear portion 1b. In both the flange portion 2 of the metal cap 3 and the peripheral edge portion of the metal base 4, the warp 8 inclined toward the press contact side is formed to increase the component rigidity at a portion (straight portion) corresponding to the opening linear portion 1 b. Therefore, the component rigidity at a portion (corner portion) corresponding to the opening corner 1a is smaller than the component rigidity at a portion (straight portion) corresponding to the opening linear portion 1b. In this case, the warp 8 may be formed only on one of the flange portion 2 of the metal cap 3 and the peripheral portion of the metal base 4.

Therefore, in the package manufacturing method of this embodiment, the component rigidity at the portion (corner portion) corresponding to the opening corner 1a is smaller than the component rigidity at the portion (straight portion) corresponding to the opening linear portion 1b. When making the opening linear portion 1b, a warp 8 inclined toward the pressure contact side is formed on the flange portion 2 of the metal cap 3 or the peripheral portion of the metal base 4 at a portion (straight portion) corresponding to the opening linear portion 1b. The rigidity of the part at the part (straight part) corresponding to the above is increased. Therefore, as shown in FIG.
The straight portion (1b) on which the warp 8 is formed is pressed first, and as a result, as shown in FIG. 21, pressure is not concentrated on the corner portion (1a) at the time of pressurization, and the flange of the metal cap 3 is pressed. Even when the thickness of the portion 2 is large at the corner (1a), the welded portion is pressed against the entire circumference with a uniform contact pressure P, and even during the welding, a uniform pressure is applied to the entire circumference of the welded portion. Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7, and the same operation and effect as in the above embodiment are exerted.

FIG. 22A shows still another embodiment corresponding to claims 1 to 4 of the present invention. In the package manufacturing method of this embodiment, a portion (corner portion) corresponding to the opening corner 1a is provided. ), The tip angle α and the tip width dimension L of the projection 6 are both smaller than those at the portion (straight portion) corresponding to the opening linear portion 1b. The same operation and effect as those in both embodiments can be obtained. In comparison with this, as shown in FIG.
Is the same in the corner portion (1a) and the straight portion (1b) (the tip angle α and the tip width dimension L are the same),
At the time of pressurization, the contact pressure P increases at the corner portion (1a). Except for this, the configuration is the same as that of the embodiment shown in FIGS. 1 to 7. In FIG. 22, only the electrode 9 and the projection 6 are conceptually shown, and other configurations are omitted. ing.

FIG. 23 shows still another embodiment corresponding to claim 10 of the present invention. The package manufacturing method according to this embodiment includes a metal cap 3 formed by drawing and having a flange 2 at a rectangular opening 1.
Is welded in a first step and a second step in the package manufacturing method of welding the metal base 4 to the peripheral surface of the metal base 4, that is, as a first step, a portion corresponding to the opening corner 1 a ( After pressure-welding at the corner portion) and performing resistance welding, as a second step, welding is performed at a portion (straight portion) corresponding to the opening linear portion 1b.

Therefore, in the package manufacturing method of this embodiment, the corner portion (1a), which is easily welded in the metal cap 3 formed by drawing, is first pressure-welded to reliably perform resistance welding, and then the straight portion is separately formed. Since the portion (1b) can be reliably welded, reliable hermetic welding can be performed around the rectangular opening 1 of the metal cap 3, and a highly reliable package without welding defects can be obtained. Therefore, even if a simple shape electrode 9 (having a high rigidity and a long life) having a rectangular concave portion is used without forming the groove S of the electrode 9 in a complicated shape as in the related art,
Airtight welding with high welding quality can be performed. The configurations of the metal cap 3, the metal base 4, and the like are the same as those in the embodiment shown in FIGS. 1 to 7, and the projection welding can be performed in the same manner as in the above-described embodiment.

FIG. 24 shows still another embodiment corresponding to the tenth and eleventh aspects of the present invention. In the package manufacturing method of this embodiment, as a first step, a portion corresponding to the opening corner 1a ( After pressure-welding at the corner portion and performing resistance welding, as a second step, energy beam welding is performed at a portion (straight portion) corresponding to the opening linear portion 1b. In this case, as the energy beam welding, laser welding, electron beam welding, or the like can be performed.

Therefore, in the package manufacturing method of the present embodiment, the corner portion (1a) is pressed first and reliably resistance-welded.
Even in b), since there is no gap between the components (between the flange portion 2 of the metal cap 3 and the peripheral surface of the metal base 4) and the components are in close contact with each other, the straight portion (1
b) can be reliably welded later by energy beam welding, and the quality of the energy beam welding is improved, and highly reliable airtight welding can be performed. Except for this, the configuration is the same as that of the embodiment shown in FIG. 23, and the same operation and effect as in the above-described embodiment are exerted.

FIG. 25 shows still another embodiment corresponding to the tenth and twelfth aspects of the present invention. In the package manufacturing method of this embodiment, as a first step, a portion corresponding to the opening corner 1a ( After the pressure welding at the corner portion and the resistance welding, as a second step, the portion corresponding to the opening linear portion 1b (the straight portion) is also pressure-welded and the resistance welding is performed. In this case, in the second step, it is preferable to use the electrode 9 that contacts only the straight portion (1b). The reason is that if the corner part (1a) also contacts, the corner part (1a) with low contact resistance
This is because a current flows only in the straight portion and sufficient welding is not performed in the straight portion (1b). Also, the energization time in the second step is preferably as short as 10 ms or less. The reason for this is that if the energization time is long, a large amount of current is also shunted to the corner portion (1a) having a low contact resistance, and sufficient welding cannot be performed at the straight portion (1b).

Therefore, in the package manufacturing method of this embodiment, the corner portion (1a) is pressed first and reliably welded by resistance.
Even in b), since there is no gap between the components (between the flange portion 2 of the metal cap 3 and the peripheral surface of the metal base 4) and the components are in close contact with each other, the straight portion (1
b) can be pressure welded later to reliably perform resistance welding, and highly reliable hermetic welding can be performed. In addition, both the preceding and succeeding steps become the same resistance welding and productivity is also increased. Moreover, the welding time required for energy beam welding, which takes about 2 seconds, can be reduced to 10 ms or less by using projection welding, and the productivity is considerably improved. In addition,
Except for this, the configuration is the same as that of the embodiment shown in FIG. 23, and the same operation and effect as in the above-described embodiment are exerted.

FIG. 26 is a block diagram of the present invention.
3 shows still another embodiment corresponding to FIG. 3, and in the package manufacturing method of this embodiment, as a first step, an opening corner portion
Resistance welding by alternating current is performed at the part (corner part) corresponding to 1a, and then, as a second step, not only the part (straight part) corresponding to the opening straight part 1b but also the opening corner part
Here, resistance welding by DC conduction is also performed at a portion (corner portion) corresponding to 1a. In this case, in the first step and the second step, it is only necessary to use the same electrode 9 and change the conduction waveform, so that only one welding facility is required and it is economical.

Therefore, in the package manufacturing method of this embodiment, resistance welding is performed by alternating current with a low peak current at the corner portion (1a). At this time, the projection 6 is only partially melted and deformed. However, in the straight portion (1b), there is no gap between the components (between the flange portion 2 of the metal cap 3 and the peripheral surface of the metal base 4) so that the welded portion is pressed uniformly over the entire circumference. Is done. Thereafter, in a state where uniform pressure is applied to the entire periphery of the welded portion, resistance welding by DC current having a high peak current is performed at the corner portion (1a) and the straight portion (1b), and the square opening 1 of the metal cap 3 is formed. A reliable hermetic welding is performed around the periphery of the workpiece. Except for this, the configuration is the same as that of the embodiment shown in FIG. 25, and the same operation and effect as in the above embodiment are exerted.

[0063]

As described above, in the package manufacturing method according to the first aspect of the present invention, since the component rigidity at the corner portion is smaller than the component rigidity at the straight portion, it is uniform over the entire circumference of the welded portion. The airtight welding is performed by applying a high pressure, a highly reliable package without welding defects can be obtained, and the airtight welding with a high welding quality can be performed even with the use of an electrode having a simple shape.

Further, in the package manufacturing method according to the second aspect of the present invention, particularly, since the projection is liable to be crushed at the corner portion due to a change in the protruding shape, the welded portion is pressed uniformly over the entire circumference at the time of pressing. In addition, uniform pressure is applied to the entire periphery of the welded portion even during welding.

In the method of manufacturing a package according to the third aspect of the present invention, particularly, since the rigidity of the projection is reduced at the corner due to a change in the tip angle, the projection is easily crushed at the corner, so The welded portion is pressed uniformly over the entire circumference, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

In the package manufacturing method according to the fourth aspect of the present invention, in particular, the rigidity of the projection is reduced at the corner portion due to a change in the width of the tip.
The projection is easily crushed at the corners, the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

In the method of manufacturing a package according to the fifth aspect of the present invention, particularly, since the rigidity of the projection is reduced at the corner portion due to a change in the height dimension, the welded portion is uniformly formed over the entire circumference at the time of pressurization. The projection is pressed and the projection is easily crushed at the corner portion, and even pressure is applied to the entire periphery of the welded portion even during welding.

In the package manufacturing method according to the sixth aspect of the present invention, in particular, since the hardness of the projection is reduced at the corner portion and the projection is easily collapsed, the welding portion is uniformly formed over the entire circumference at the time of pressing. It is pressed and uniform pressure is applied to the entire circumference of the weld even during welding.

Further, in the package manufacturing method according to the present invention, since the material escapes to the concave portion at the corner portion when pressurizing, the rigidity of the projection at the corner portion is reduced, and the projection is reduced. The corner portion is easily crushed, so that the welded portion is pressed uniformly over the entire circumference at the time of pressurization, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

Further, in the package manufacturing method according to the eighth aspect of the present invention, in particular, the thickness of the portion facing the projection is reduced at the corner portion, the rigidity is reduced, and the pressure is concentrated at the corner portion. Therefore, the welded portion is pressed uniformly over the entire circumference, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

Further, in the package manufacturing method according to the ninth aspect of the present invention, in particular, the warped straight portion is pressed first, and as a result, pressure is concentrated on the corner portion at the time of pressing. Therefore, the welded portion is pressed uniformly over the entire circumference, and uniform pressure is applied to the entire circumference of the welded portion even during welding.

In the package manufacturing method according to the tenth aspect of the present invention, since the corner portions which are easily welded are pressure-welded and resistance-welded, the straight portions can be separately and reliably welded. Airtight welding can be performed, a highly reliable package free from welding defects can be obtained, and airtight welding with high welding quality can be performed even when electrodes having a simple shape are used.

In the method of manufacturing a package according to the eleventh aspect of the present invention, particularly, the straight portion in the closely contacted state can be reliably welded by energy beam welding, so that the quality of the energy beam welding is good. As a result, highly reliable airtight welding can be performed.

Further, in the package manufacturing method according to the twelfth aspect of the present invention, in particular, since the straight portions which have come into close contact with each other can be pressed and reliably welded by resistance,
A highly reliable airtight welding can be performed, and both the preceding and subsequent steps become the same resistance welding, thereby increasing the productivity.

In the package manufacturing method according to the thirteenth aspect of the present invention, in particular, resistance welding is performed at a corner portion by low alternating current, and at this time, even if only a partial melting is performed, the welding portion is formed. Is uniformly pressed over the entire circumference, and thereafter, resistance welding is performed by direct current at the corner portion and the straight portion, so that reliable hermetic welding is performed.

[Brief description of the drawings]

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

FIG. 2 shows a main configuration of the package manufacturing method, and FIG.
Is a schematic plan view, (b) is an enlarged plan view of a portion C in (a), (c) is an AA cross-sectional view in (b), and (d) is a BB cross-sectional view in (b).

FIG. 3 is a perspective view showing the entire process of the package manufacturing method.

FIG. 4 is a sectional view taken along line XX in FIG. 3;

FIG. 5 is a sectional view showing a welding state in the package manufacturing method.

FIG. 6 is a graph showing a relationship between current and time during welding in the package manufacturing method.

FIG. 7 is a schematic sectional view showing main steps of the package manufacturing method.

8A and 8B show a main configuration of a package manufacturing method according to another embodiment, where FIG. 8A is a plan view of a main part, FIG. 8B is a cross-sectional view taken along the line AA in FIG. BB sectional drawing.

FIG. 9 is a schematic sectional view showing main steps of the package manufacturing method.

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

FIG. 11 is a schematic sectional view showing main steps of a package manufacturing method according to still another embodiment.

FIG. 12 is a schematic sectional view showing a comparative example in the package manufacturing method.

FIG. 13 is a schematic plan view showing a main configuration of a package manufacturing method according to still another embodiment.

FIG. 14 is a schematic sectional view showing main steps of the package manufacturing method.

FIG. 15 is a schematic plan view showing a main configuration of a package manufacturing method according to still another embodiment.

FIG. 16 is a schematic sectional view showing main steps of the package manufacturing method.

FIG. 17 is a schematic side view showing a main configuration of a package manufacturing method according to still another embodiment.

FIG. 18 is a schematic sectional view showing main steps of the package manufacturing method.

FIG. 19 is a schematic perspective view showing a main configuration of a package manufacturing method according to still another embodiment.

FIG. 20 shows a state before pressurization of the package manufacturing method,
19A is a sectional view taken along the line AA in FIG. 19, and FIG.
BB sectional drawing in FIG.

FIG. 21 shows a pressurized state of the package manufacturing method,
19A is a sectional view taken along the line AA in FIG. 19, and FIG.
BB sectional drawing in FIG.

FIG. 22A is a schematic sectional view showing main steps of a package manufacturing method according to still another embodiment, and FIG. 22B is a schematic sectional view showing a comparative example in the package manufacturing method.

FIG. 23 is a schematic plan view showing main steps of a package manufacturing method according to still another embodiment.

FIG. 24 is a schematic plan view showing main steps of a package manufacturing method according to still another embodiment.

FIG. 25 is a schematic sectional view showing main steps of a package manufacturing method according to still another embodiment.

FIG. 26 is a schematic cross-sectional view showing main steps of a package manufacturing method according to still another embodiment, and a graph showing the relationship between current and time in each step.

FIG. 27 is a perspective view showing main steps of a conventional package manufacturing method.

FIG. 28 shows a welding state of the package manufacturing method;
(A) is a side view, (b) is a YY sectional view in (a).

FIG. 29 is a schematic sectional view showing main steps of the package manufacturing method.

FIG. 30 is a schematic plan view showing a main configuration of the package manufacturing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Square opening 1a Opening corner part 1b Opening straight part 2 Flange part 3 Metal cap 4 Metal base 5 Pressure contact surface 6 Projection 7 Concave part 8 Warpage 9 Electrode α Tip angle L Tip width dimension H Height dimension T Plate thickness dimension

Claims (13)

[Claims] In a package manufacturing method in which a flange portion of a metal cap formed by drawing and having a flange portion at a rectangular opening is pressure-welded to a peripheral surface of a metal base and resistance-welded, a portion corresponding to the opening corner portion. A method of manufacturing a package in which the rigidity of a component at a part is smaller than the rigidity of the part at a portion corresponding to the opening linear portion, and the flange portion of the metal cap is pressed against the peripheral surface of the metal base. 2. A projection is formed on a pressure-welded surface to be resistance-welded, and by changing a projection shape of the projection, a component rigidity at a portion corresponding to an opening corner portion is increased at a portion corresponding to an opening linear portion. 2. The method according to claim 1, wherein the rigidity is smaller than the rigidity. 3. The package manufacturing method according to claim 2, wherein a tip angle of the projection at a portion corresponding to the opening corner portion is smaller than that at a portion corresponding to the opening straight portion. 4. The package manufacturing method according to claim 2, wherein the width of the tip of the projection at a portion corresponding to the opening corner is smaller than that at a portion corresponding to the straight opening. 5. The package manufacturing method according to claim 2, wherein the height of the projection at a portion corresponding to the opening corner is smaller than that at a portion corresponding to the straight opening. 6. A projection is formed on a pressure-welded surface to be resistance-welded, and the hardness of the projection at a portion corresponding to the opening corner portion is made smaller than that at a portion corresponding to the opening linear portion, so that the projection corner is formed. 2. The package manufacturing method according to claim 1, wherein the rigidity of the part at the portion where the part is formed is made smaller than the rigidity of the part at the part corresponding to the linear opening. 7. A projection is formed on a press-contact surface to be resistance-welded, and a recess for pressure relief is formed behind the press-contact surface at a portion corresponding to an opening corner so as to correspond to the projection. 2. The package manufacturing method according to claim 1, wherein the component rigidity at a portion corresponding to the corner portion is smaller than the component rigidity at a portion corresponding to the opening linear portion. 8. A projection is formed on a pressure-welded surface to be resistance-welded, and the thickness of a portion corresponding to the opening corner portion facing the projection is made smaller than that of a portion corresponding to the opening straight portion. 2. The package manufacturing method according to claim 1, wherein the rigidity of the component at a portion corresponding to the opening corner is smaller than the rigidity of the component at a portion corresponding to the opening linear portion. 9. A part of the flange portion of the metal cap or a peripheral portion of the metal base at a portion corresponding to the linear opening portion is formed with a warp inclined toward the press contact side to increase component rigidity at a portion corresponding to the linear opening portion. 2. The package manufacturing method according to claim 1, wherein the component rigidity at a portion corresponding to the opening corner is smaller than the component rigidity at a portion corresponding to the opening linear portion. 10. A metal cap formed by drawing and having a flange at a rectangular opening,
In a package manufacturing method of welding to a peripheral surface of a metal base, a package manufacturing method in which a portion corresponding to an opening corner portion is pressure-welded and resistance-welded, and then welded at a portion corresponding to a linear opening portion. 11. The package manufacturing method according to claim 10, wherein energy beam welding is performed at a portion corresponding to the linear portion of the opening. 12. The method for manufacturing a package according to claim 10, wherein a portion corresponding to the linear portion of the opening is pressure-welded to perform resistance welding. 13. The method according to claim 1, wherein resistance welding is performed by alternating current at a portion corresponding to the corner of the opening, and then resistance welding is performed by direct current at the corner of the opening as well as the portion corresponding to the straight portion of the opening. The method for manufacturing a package according to claim 12.