JP2022057500A - Method of manufacturing joint body - Google Patents

Abstract

To suppress poor solder appearance occurring when a joint material is melted in a state where the joint material is displaced in a method of manufacturing a joint body which joins a first component and a second component with the joint material.SOLUTION: Disclosed is a method of manufacturing a joint body which joins a first component and a second component 12 by a joint material 15. This method includes: a first joining step of joining at least a portion of the joint material 15 to the tip surface of the second component 12; a step of arranging the first component at a tip part of the second component 12; and a second joining step of joining the first component and the second component 12 via the joint material 15.SELECTED DRAWING: Figure 5

Description

The present invention relates to a method for producing a bonded body.

Joining members such as adhesives and solders are used to join dissimilar materials.

For example, in the optical unit of Patent Document 1, the cylindrical frame and the optical member are joined by accommodating the optical member in the tubular frame and solder-bonding the optical member.

That is, this optical unit uses a cylindrical frame and a cylindrical optical member, and a recess having an inner diameter larger than that of the other end is formed on one end side of the tubular frame. When joining the optical member to the tubular frame, the optical member is erected so that the concave portion formed in the tubular frame faces upward, and the optical member is housed in the concave portion of the tubular frame. At this time, a gap is formed between the inner surface of the recess and the outer peripheral surface of the optical member. An annular joint material formed of a solder material is placed on the annular surface of the tubular frame so as to cover the upper opening of this gap. At this time, since the tip surface of the optical member housed in the concave portion of the tubular frame protrudes by a predetermined amount from the annular surface of the tubular frame, the annular joining material is positioned. (For example, FIG. 3 of Patent Document 1). When the front end surface of the optical member is substantially the same as the annular surface of the cylindrical frame, the annular joining material is positioned on the rear end surface of the optical member. (For example, FIG. 12 of Patent Document 1).

Then, a load is applied to the optical member by a jig to press the optical member against the annular bottom surface of the concave portion of the tubular frame, and in this state, the optical member, the tubular frame and the joining material are put into the heating furnace. The bonding material is melted in the heating furnace, a predetermined amount of the melted solder material is filled in the gap, and the remaining solder material stays on the annular surface of the tubular frame. After that, the optical member and the tubular frame are joined by cooling and solidifying the joining material.

The above-mentioned jig is a jig for applying a load to the optical member, and since the positioning of the annular joining material is performed by the optical member, the annular joining material is not positioned by the jig.

Japanese Unexamined Patent Publication No. 2006-288423

However, Patent Document 1 does not describe a method for manufacturing a joint between an optical member and a tubular frame when the annular joint cannot be positioned by the optical member. If the annular joint material is not positioned, the annular joint material will be displaced due to vibration or the like when it is put into the heating furnace. If the annular bonding material is melted in a misaligned state, the melted solder material may adhere to the surface of the optical component, resulting in poor solder appearance.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for manufacturing a bonded body that suppresses solder appearance defects.

A method for manufacturing a joined body in which a first part and a second part are joined by a joining material, the first joining step of joining at least a part of the joining material to the tip surface of the second part, and the second. It is a method of manufacturing a bonded body including a step of arranging a first component at a tip portion of a component and a second joining step of joining the first component and the second component via a bonding material. The joining material may be annular. In the first joining step, a part of the outer periphery of the joining material may be joined to the tip surface. Further, the first component may be cylindrical, the second component may have a tubular shape having a recess at the tip, and the first component may be housed in the recess of the second component. In the first joining step, the joining material is joined to the annular tip surface of the recess, and in the second joining step, the joining material is melted and filled between the inner surface of the recess and the outer peripheral surface of the first component. The part and the second part may be joined. Further, in the first joining step, the joining material may be joined at a plurality of places.

According to the method for manufacturing a bonded body of the present invention, defects in solder appearance can be suppressed.

It is a bonded body, (a) is a plan view, and (b) is a sectional view. It is a first component, (a) is a plan view, and (b) is a sectional view. The second component is a plan view (a) and a cross-sectional view (b). It is a joining material, (a) is a plan view, and (b) is a sectional view. A joining material is joined to the annular tip surface of the second component, where (a) is a plan view and (b) is a cross-sectional view. The first component is housed in the recess of the second component, where (a) is a plan view and (b) is a cross-sectional view. It is a top view which joined the part of the outer periphery of the bonding material to the annular tip surface of the 2nd component. It is a top view which joined the outer periphery of the joining material at three places to the annular tip surface of the 2nd component.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In order to make the explanation easy to understand, the order of explanation is as follows. First, the joined body will be described, then the parts (first part, second part, and joining material) constituting the joined body will be described, and finally, the method for manufacturing the joined body of the present invention will be described. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. Further, in the drawings, in order to make each configuration easy to understand, the actual shape or structure may differ from the scale or number of each structure.

1 (a) is a plan view of a joined body according to the method for manufacturing a joined body of the present invention, and FIG. 1 (b) is a cross-sectional view taken along the line AA of FIG. 1 (a). The bonded body 10 obtained from the method for producing the bonded body of the present invention is as follows. An annular joining material 15 is joined to the annular tip surface 14 of the concave portion 13 of the second component 12, and the first component 11 is housed in the concave portion 13 of the second component 12 and then put into the heating furnace. (See FIG. 6 described later). The annular joining material 15 is melted in the heating furnace, and a predetermined amount of the melted annular joining material 15 is between the inner surface of the recess 13 of the second component 12 and the outer peripheral surface of the first component 11. Filled. Further, the remaining molten annular joining material 15 stays on the surface of the annular tip surface 14 of the recess 13 of the second component 12. After that, by cooling and solidifying the molten annular bonding material 15, the annular bonding material 15 becomes the bonding material 16 and the first component 11 and the second component 12 are bonded to obtain the bonded body 10. ..

The above-mentioned joint 10 is composed of the following parts.

2 (a) is a plan view of the first component, and FIG. 2 (b) is a sectional view taken along the line AA of FIG. 2 (a). The first component 11 is a translucent member made of, for example, glass or crystal. Although not shown, a metal film is formed on the outer peripheral surface of the first component 11 to improve the wettability of the annular joining material 15. The metal film may be appropriately selected in consideration of adhesion to the annular bonding material 15, such as a Ni film for the base layer and an Au film for the surface layer. The first component 11 has a columnar shape, an outer diameter of 5 mm, and a thickness of 1 mm.

3A is a plan view of the second component, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A. The second component 12 has a tubular shape and is made of, for example, a stainless steel member. A recess 13 is formed on one end side of the second component 12. An annular joining material 15, which will be described later, is joined to the annular tip surface 14 of the recess 13. (See FIG. 5 described later). Although not shown, a metal film is formed on the inner surface of the recess 13 of the second component 12 and the annular tip surface 14 to improve the wettability with the annular joining material 15. The metal film may be appropriately selected in consideration of adhesion to an annular bonding material such as a Ni film for the base layer and an Au film for the surface layer. The outer diameter of the second component 12 is 6 mm, the inner diameter of the recess 13 accommodating the first component 11 is 5.2 mm, and the length is 5 mm. The recess 13 formed on one end side of the second component 12 is for accommodating the first component 11 described above, and the shape is not limited to the recess, and may be, for example, a stepped portion. ..

4 (a) is a plan view of the annular joint material, and FIG. 4 (b) is a cross-sectional view taken along the line AA of FIG. 4 (a). The annular bonding material 15 is made of, for example, AuSn solder. The annular joint material 15 has an inner diameter of 5.2 mm, an outer diameter of 6 mm, and a thickness of 0.2 mm. The annular bonding material 15 is not limited to AuSn solder, and AgSn solder may be used.

The above-mentioned bonded body 10 is obtained by the following method for manufacturing a bonded body.

The above-mentioned first part 11, the second part 12, and the annular joining material 15 are prepared.

5 (a) is a plan view in which a joining material is joined to the annular tip surface of the second component, and FIG. 5 (b) is a sectional view taken along the line AA of FIG. 5 (a). First, the annular joining material 15 is arranged on the annular tip surface 14 of the recess 13 of the second component 12. Next, the surface of the annular joining material 15 is melted with a laser or the like, for example, a part between the inner circumference and the outer circumference of the annular joining material 15, and the annular tip surface of the recess 13 of the second component 12 is melted. It is joined to 14 to form a joint portion 17a. This corresponds to the first joining step. The spot diameter of the laser at this time is 0.2 mm. When the annular joining material 15 is joined to the annular tip surface 14 of the recess 13 of the second component 12, a cylindrical jig or the like is housed in the recess 13 of the second component 12. Since the tip surface of this cylindrical jig protrudes by a predetermined amount from the annular tip surface 14 of the recess 13 of the second component 12, the annular joining member 15 can be positioned, so that the recess 13 of the second component 12 can be positioned. The annular bonding material 15 can be accurately bonded to the annular tip surface 14 of the above. If the bonding can be performed with high accuracy, it is possible to suppress the deterioration of the solder appearance when the annular bonding material 15 is melted. The atmosphere for joining the joining materials is, for example, an atmospheric atmosphere, a nitrogen atmosphere, and a vacuum atmosphere.

6 (a) is a plan view in which the first component is housed in the recess of the second component, and FIG. 6 (b) is a sectional view taken along the line AA of FIG. 6 (a). In this embodiment, the stepped portion in the cylinder of the recess 13 of the second component 12 corresponds to the tip end portion of the second component 12. By arranging the first component 11 on the bottom surface of the recess 13 of the second component 12, a gap is formed between the inner surface of the recess 13 of the second component 12 and the outer peripheral surface of the first component 11. To. At this time, the annular joint member 15 is not positioned by the first component 11. As described above, the annular joining material 15 is joined to the annular tip surface 14 of the recess 13 of the second component 12.

Finally, the pre-joining product in which the first component 11 is housed in the recess 13 of the second component 12 is put into the heating furnace. At this time, since the annular joining material 15 is joined to the annular tip surface 14 of the recess 13 of the second component 12, the annular joining material 15 is joined even if vibration when it is put into the heating furnace is applied. Does not shift position. In the heating furnace, the annular joint material 15 begins to melt from the joint portion 17a, and the annular joint material 15 is gradually melted. A predetermined amount of the molten annular joining material 15 is filled between the inner surface of the recess 13 of the second component 12 and the outer peripheral surface of the first component 11. The remaining molten annular joining material 15 stays in the annular tip surface 14 of the recess 13 of the second component 12. After that, by cooling and solidifying the molten annular bonding material 15, the annular bonding material 15 becomes the bonding material 16 and the first component 11 and the second component 12 are bonded to obtain the bonded body 10. .. (See FIG. 1 described above). This corresponds to the second joining step. The reason why the annular joining material 15 starts melting from the joining portion 17a in the heating furnace is as follows. This is because the joint portion 17a is easier to melt than the unbonded portion because the residual heat when the annular joining material 15 is joined to the annular tip surface 14 of the concave portion 13 of the second component 12 remains. In this way, since the annular joining material 15 is joined to the annular tip surface 14 of the recess 13 of the second component 12, the annular joining material 15 is joined even if vibration when it is put into the heating furnace is applied. Since the position does not shift, it is possible to suppress the solder appearance defect. The atmosphere in the heating furnace is, for example, an atmospheric atmosphere, a nitrogen atmosphere, and a vacuum atmosphere.

FIG. 7 is a plan view in which a part of the outer periphery of the joining material is joined to the annular tip surface of the second component. A part of the outer circumference of the annular joining material 15 is melted by a laser or the like and joined to the outer circumference of the annular tip surface 14 of the recess 13 of the second component 12 to form the joining portions 17b and 17c. When the pre-joining product containing the first component 11 in the recess 13 of the second component 12 is put into the heating furnace, the annular bonding material 15 is bonded to the annular tip surface 14 of the recess 13 of the second component 12. Melting starts from the outer periphery of the joined portions 17b and 17c, that is, the annular joining material 15, and melts toward the inner circumference of the annular joining material 15. As a result, the molten joint material is easily filled between the inner surface of the recess 13 of the second component 12 and the outer peripheral surface of the first component 11.

FIG. 8 is a plan view in which the outer periphery of the joining material is joined to the annular tip surface of the second component at three points. The outer periphery of the annular joining material 15 is melted at three points by a laser or the like and joined to the outer periphery of the annular tip surface 14 of the recess 13 of the second component 12 to form the joining points 17d, 17e and 17f. At this time, if the three joined points are connected by a virtual line and viewed in a plane, it becomes a substantially equilateral triangle. When joined so as to form an equilibrium triangle, the lengths of the virtual lines connecting the joining points 17d, 17e, and 17f are the same, so that the joining points are balanced. As a result, in the second step, it is possible to suppress the problem that the outer peripheral portion of the annular joint material 15 is rolled up due to the shrinkage of the annular joint material 15 due to heat. The outer peripheral 6 points of the annular joining material 15 are melted by a laser or the like and joined to the outer periphery of the annular tip surface 14 of the recess 13 of the second component 12 to form 6 joining points. When the six joined points are connected by a virtual line and viewed in a plane, a substantially regular hexagon is formed, and the lengths of the virtual lines connecting the six joined points are the same, so that the above-mentioned effect can be obtained. Further, nine outer peripheral points of the annular joining material 15 are melted by a laser or the like and joined to the outer peripheral surface of the annular tip surface 14 of the recess 13 of the second component 12 to form nine joining points. When the nine joined points are connected by a virtual line and viewed in a plane, a substantially regular nonagon is formed, and the lengths of the virtual lines connecting the nine joined points are the same, so that the above-mentioned effect can be obtained.

An example is shown in which the outer periphery of the annular joining material 15 is joined to the outer periphery of the annular tip surface 14 of the recess 13 of the second component 12, and then the first component 11 is housed in the recess 13 of the second component 12. However, after the first component 11 is housed in the second component 12, the outer circumference of the annular joining member 15 may be joined to the outer circumference of the annular tip surface 14 of the recess 13 of the second component 12. Further, in this embodiment, since the shape of the tip surface of the second component 12 is the annular tip surface 14, an example using an annular joining material 15 is shown, but the present invention is not limited to this example, and the second component is not limited to this example. The shape of the joining material may be appropriately selected according to the shape of the tip surface of 12.

10 Joined body 11 1st part 12 2nd part 13 Recessed 14 Circular tip surface 15 Circular annular joint material (melted annular joint material)
16 Joint material 17a, 17b, 17c, 17d, 17e, 17f Joint location

Claims (6)

It is a method of manufacturing a joined body in which a first part and a second part are joined by a joining material.
The first joining step of joining at least a part of the joining material to the tip surface of the second part,
The step of arranging the first component at the tip of the second component, and
A method for manufacturing a joined body, comprising: a second joining step of joining the first part and the second part via the joining material. The method for manufacturing a bonded body according to claim 1, wherein the bonded material is annular. In the first joining step,
The method for manufacturing a bonded body according to claim 1 or 2, wherein a part of the outer periphery of the bonded material is bonded to the tip surface. The first component is cylindrical, the second component is tubular with a recess at the tip thereof, and the first component is housed in the recess of the second component. The method for manufacturing a bonded body according to any one of claims 1 to 3. In the first joining step,
The joining material is joined to the annular tip surface of the recess,
In the second joining step,
The claim is characterized in that the first part and the second part are joined by melting the joining material and filling the space between the inner surface of the recess and the outer peripheral surface of the first part. 4. The method for manufacturing a bonded body according to 4. In the first joining step,
The method for manufacturing a bonded body according to any one of claims 1 to 5, wherein the bonded material is bonded at a plurality of locations.

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