Method of producing third member by in-furnace brazing first member and second member
By forming recesses with notches at joint surfaces to store brazing material, the method addresses solder flow issues, ensuring strong bonding and cost-effective production of third members.
Patent Information
- Application Number
- JP2023101469
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-06-21
- Publication Date
- 2025-01-09
AI Technical Summary
The challenge in producing a third member through furnace brazing is the flow of solder metal onto the mounting surface, which requires meticulous removal to maintain flatness and surface roughness, increasing manufacturing costs due to careful material selection and visual inspection.
The method involves forming a recess at the corner of the joint surfaces with a notch open upward, storing brazing material within the recess to prevent its flow onto the mounting surface, and using notches with specific angles and shapes to ensure bonding strength and visibility of the fillet.
This approach ensures reliable bonding strength while preventing solder metal from flowing out, simplifying production and reducing costs by allowing easy visual confirmation of fillet placement and adjusting brazing material weight for optimal bonding.
Smart Images
Figure 2025001790000001_ABST
Abstract
Description
[Technical field]
[0001] The present invention relates to a method for producing a third component by joining a first component and a second component by furnace brazing. [Background technology]
[0002] When a first joining surface of a first member is butted against a second joining surface of a second member, the second member has an attachment surface that intersects with the second joining surface and faces upward, and the first and second joining surfaces are butted against each other and joined by furnace brazing to produce a third member made of the first and second members, the attachment surface may be required to have flatness, surface roughness, etc., in order to attach a component to the attachment surface. In such cases, when the brazing material flows out onto the mounting surface, it becomes necessary to carry out the tedious task of removing the brazing material from the mounting surface using a sharp blade while maintaining the flatness and surface roughness of the mounting surface. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] JP 2012-13289 A Summary of the Invention [Problem to be solved by the invention]
[0004] When producing a third component having such an attachment surface, it is necessary to strictly control the weight of the brazing material used while ensuring the bonding strength between the first and second bonding surfaces and to prevent the brazing material from flowing onto the attachment surface, and it is also necessary to visually check whether the brazing material has flowed onto the attachment surface, which increases the manufacturing cost of the third component. The present invention has been devised in consideration of the above-mentioned circumstances, and has an object to provide a method for producing a third member consisting of a first member and a second member by furnace brazing a first member and a second member, in which the first and second bonding surfaces are butted together and joined by furnace brazing to produce a third member consisting of the first member and the second member, while ensuring the bonding strength between the first and second bonding surfaces and preventing the brazing material from flowing out onto the attachment surface. [Means for solving the problem]
[0005] In order to achieve the above-mentioned object, one embodiment of the present invention is a method for producing a third member made of the first member and the second member, in which a second joining surface of a second member is butted against a first joining surface of a first member, the second member having an attachment surface that intersects with the second joining surface and faces upward, and the first joining surface and the second joining surface are butted against each other by furnace brazing, the method comprising the steps of: providing a third member made of the first member and the second member; a notch is provided so that an upwardly open recess is formed when the first joining surface and the second joining surface are butted together, and the remaining area of the second joining surface, reduced by the notch, is set to an area that can provide sufficient joining strength when brazed to the first joining surface in a furnace, and when the first joining surface and the second joining surface are joined by furnace brazing, the excess brazing material except for the brazing material for joining the first joining surface and the second joining surface is stored in the recess to prevent the brazing material from flowing out onto the attachment surface. In one embodiment of the present invention, the first bonding surface and the second bonding surface are both formed as flat surfaces. In addition, in one embodiment of the present invention, the attachment surface is formed as a plane perpendicular to the second joint surface. Moreover, one embodiment of the present invention is characterized in that the second bonding surface has a width greater than that of the first bonding surface, and the notch is provided only at the portion of the second bonding surface where the first bonding surface is butted against the second bonding surface. In addition, in one embodiment of the present invention, the first bonding surface and the second bonding surface are formed as curved surfaces that are fitted together. In addition, one embodiment of the present invention is characterized in that a plurality of the cutouts are provided at intervals in the extending direction of the corner portion. In addition, one embodiment of the present invention is characterized in that the cutout has a cutout bottom surface connecting a portion of the second joint surface away from the corner and a portion of the mounting surface away from the corner, and an angle at which an imaginary line passing through the intersection point between the cutout bottom surface and the second joint surface and the intersection point between the cutout bottom surface and the mounting surface 1204 intersects with the second joint surface is in the range of 30 degrees to 60 degrees. In one embodiment of the present invention, the bottom surface of the cutout portion is provided in a stepped shape that is displaced upward in stages from an intersection point between the bottom surface of the cutout portion and the second joint surface. Furthermore, one embodiment of the present invention is characterized in that a plurality of brazing filler metals of different weights are prepared before mass production of the third component, and the first joining surface and the second joining surface are brazed in a furnace using the brazing filler metal, and the brazing filler metal remaining in the recess, excluding the brazing filler metal for joining the first joining surface and the second joining surface, is used for mass production of the third component. Effect of the Invention
[0006] According to one embodiment of the present invention, during furnace brazing, the first and second joining surfaces are brazed and joined, and any excess brazing material other than that required to join the first and second joining surfaces is stored in a recess, preventing the brazing material from flowing out onto the mounting surface. After furnace brazing, the brazing material in the recess, i.e., the fillet, is visually inspected. If the fillet is located within the recess, it is determined that sufficient brazing material has been supplied between the butted first and second joining surfaces, and that the first and second joining surfaces are joined with sufficient joining strength. If the fillet is not located within the recess, it is determined that there is insufficient brazing material and the joining strength is insufficient. Therefore, by using a brazing material of a weight such that the fillet is located within the recess, it is advantageous in easily and reliably producing a third component in which the brazing material does not flow out onto the attachment surface. Furthermore, according to one embodiment of the present invention, the first bonding surface and the second bonding surface may both be formed as flat surfaces, and the mounting surface may be formed as a flat surface perpendicular to the second bonding surface. Furthermore, when the second joint surface has a width greater than that of the first joint surface, the notch may be provided only at the location of the second joint surface where the first joint surface butts against the second joint surface. According to an embodiment of the present invention, the first bonding surface and the second bonding surface may be formed by curved surfaces that are joined to each other. Furthermore, by providing multiple notches at intervals in the extension direction of the corner portion, a second bonding surface can be secured between adjacent recesses, which is advantageous in easily and reliably producing a third component that does not have solder material flowing out onto the mounting surface. In addition, this is more advantageous in increasing the area of the second bonding surface that is bonded to the first bonding surface, and is more advantageous in increasing the bonding strength between the first component and the second component. Furthermore, if the angle at which an imaginary line passing through the intersection point between the bottom surface of the cutout and the second joint surface and the intersection point between the bottom surface of the cutout and the mounting surface intersects with the second joint surface is set in the range of 30 degrees to 60 degrees, it becomes easier to visually determine where the fillet is located within the recess, which is advantageous in adjusting the weight of the brazing material used to an appropriate weight by increasing or decreasing it a little more. Furthermore, if the bottom surface of the cutout is formed in a stepped shape that gradually displaces upward from the intersection of the bottom surface of the cutout and the second joining surface, it is easier to visually determine where the fillet is located within the recess, which is advantageous in adjusting the weight of the solder used to an appropriate weight and is more advantageous in ensuring the joining strength between the first and second joining surfaces and easily and reliably producing a third component in which the solder does not flow out onto the mounting surface. Furthermore, if the weight of the remaining brazing material remaining within the recess, excluding the brazing material used to join the first and second joining surfaces, is used to mass-produce the third component, the joining strength between the first and second joining surfaces is ensured, and the third component in which the brazing material does not flow out onto the mounting surface can be produced more easily and reliably, which is advantageous for significantly reducing the cost of the third component. [Brief description of the drawings]
[0007] [Figure 1] 5A, 5B, and 5C are explanatory views of a third member according to the first embodiment, in which FIG. 5A is a plan view, FIG. 5B is a front view, and FIG. [Diagram 2] 5A, 5B, and 5C are explanatory views of a second member of the first embodiment, in which (A) is a plan view, (B) is a partially sectional front view, and (C) is a side view. [Diagram 3] 11 is a front view of a state in which a first joint surface of a first member and a second joint surface of a second member are butted together to form a recess. FIG. [Figure 4] 4 is an explanatory view of a fillet formed when a first joint surface of a first member and a second joint surface of a second member are brazed in a furnace. FIG. [Diagram 5] FIG. 11 is an explanatory diagram of a cutout in a second embodiment, where (A) shows a cutout whose bottom surface is formed by a curved surface, and (B) shows a cutout whose bottom surface is formed by two planes that are perpendicular to each other. [Figure 6] FIG. 11 is an explanatory diagram of a third embodiment in which the bottom surface of the cutout is formed in a stepped shape that is displaced upward in stages from the second joint surface, (A) shows a cutout in which the bottom surface of the cutout is composed of three curved surfaces and four protrusions located at the ends of the curved surfaces, and (B) shows a cutout in which the bottom surface of the cutout is composed of two curved surfaces and three inclined surfaces located between and on both sides of the curved surfaces. [Figure 7] FIG. 11 is an explanatory diagram of a third embodiment in which the bottom surface of the cutout is formed in a stepped shape that is displaced upward in stages from the second joint surface, where (A) shows a cutout in which the bottom surface of the cutout is formed by three V-grooves whose groove surfaces intersect at 90 degrees, and (B) shows a cutout in which the bottom surface of the cutout is formed by two V-grooves whose groove surfaces intersect at 90 degrees and the base ends of the V-grooves are formed by inclined surfaces. [Figure 8] FIG. 11 is an explanatory diagram of a third embodiment in which the bottom surface of the cutout is formed in a stepped shape that is displaced upward in stages from the second joint surface, where (A) shows a cutout in which the bottom surface of the cutout is formed by three V-grooves whose groove surfaces intersect at acute angles, and (B) shows a cutout in which the bottom surface of the cutout is formed by two V-grooves whose groove surfaces intersect at acute angles and the base ends of the V-grooves are formed by inclined surfaces. [Figure 9] 13 is an explanatory diagram of a third member according to a fourth embodiment, in which (A) is a plan view and (B) is a front view. FIG. [Figure 10] 13 is an explanatory diagram of a missing portion of the fourth embodiment, in which (A) is a side view of the second member, and (B) is a front view of the second member. [Figure 11] FIG. 13 is a plan view of the cutout of the fourth embodiment; (A) is the cutout used in FIG. 9 and FIG. 10 and has an open rectangular shape on the second joining surface side; (B) has an open semicircular arc shape on the second joining surface side; and (C) has an open V-shape on the second joining surface side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the first member 10 is an arm made of a metal plate, the second member 12 is a base plate made of a metal plate, and the first member 10 and the second member 12 are brazed in a furnace to produce the third member 14. One surface in the thickness direction of the first member 10 is a flat first joining surface 1002, and the side surface of the second member 12 is a flat second joining surface 1202 to which the first joining surface 1002 is butted and brazed in a furnace. As shown in FIG. 2, the second member 12 has a flat mounting surface 1204 facing upward and perpendicular to the second joining surface 1202, with a hole 1206 formed therethrough and a number of female threads 1208 formed around the hole 1206. In this embodiment, the mounting surface 1204 is a location where the flange of the pipe is liquid-tightly joined via a plurality of bolts (not shown) that screw into the female threads and a sealing material (not shown), and this location ensures flatness and surface roughness and does not allow the solder material 16 (see FIG. 1(C)) to flow out.
[0009] As shown in FIG. 2, at the location of the second joint surface 1202 where the first joint surface 1002 is butted, a notch 1212 that is open on both the second joint surface 1202 side and the mounting surface 1204 side is provided at the corner 1210 between the second joint surface 1202 and the mounting surface 1204. Although the cutout 1212 may be provided over the entire length of the corner 1210, in this embodiment it is provided only at the corner 1210 at the location of the second bonding surface 1202 where the first bonding surface 1002 is butted against. As shown in FIG. 3, this cutout 1212 constitutes a recess 18 that is open upward when the first bonding surface 1002 and the second bonding surface 1202 are butted against each other. As shown in FIG. 2, the recess 1212 connects a portion of the second joint surface 1202 away from the corner 1210 and a portion of the mounting surface 1204 away from the corner 1210, and has a recess bottom surface 1214 that is inclined with respect to the second joint surface 1202. In this embodiment, the cutout bottom surface 1214 is formed as an inclined surface that is a flat surface that gradually rises from a portion of the second bonding surface 1202 that is away from the corner portion 1210 . Here, the area of the second bonding surface 1202 is reduced by providing the notch 1212, but the remaining area of the second bonding surface 1202 reduced by the notch 1212 is set to an area that will provide sufficient bonding strength when brazed to the first bonding surface 1002 in a furnace.
[0010] In this embodiment, as shown in FIG. 3, the first joining surface 1002 and the second joining surface 1202 are butted against each other, and for example, a round rod-shaped brazing material 16 shown by imaginary lines is placed on the recess 18 and brazed in a furnace. During furnace brazing, the first joining surface 1002 and the second joining surface 1202 are brazed and joined, and the brazing material 16 that protrudes from the first joining surface 1002 and the second joining surface 1202, in other words, the brazing material 16 that is excess over the brazing material 16 required to join the first joining surface 1002 and the second joining surface 1202, is stored in the recess 18 as a fillet 1602. Therefore, the recess 18 prevents the brazing material 16 from flowing out onto the mounting surface 1204, thereby ensuring the flatness and surface roughness of the mounting surface 1204. Therefore, it becomes possible to simply and reliably liquid-tightly join the flange of the pipe to the mounting surface 1204 via the sealant. Furthermore, after brazing in a furnace, the brazing material 16 in the recess 18, ie, the fillet 1602, is visually observed. That is, as shown by F1, F2, and F3 in FIG. 4, if the fillet 1602 is located within the recess 18, it is found that sufficient brazing material 16 is supplied between the butted first joining surface 1002 and second joining surface 1202, and the first joining surface 1002 and the second joining surface 1202 are joined with sufficient joining strength, and conversely, if the fillet 1602 is not located within the recess 18, it is found that there is insufficient brazing material 16 and the joining strength is insufficient. In other words, by visually confirming that the fillet 1602 is located within the recess 18, it is advantageous to easily and reliably produce the third member 14 in which the first bonding surface 1002 and the second bonding surface 1202 are bonded with sufficient bonding strength. Therefore, according to this embodiment, by storing the excess brazing material 16 from the joining of the first joining surface 1002 and the second joining surface 1202 in the recess 18, it is possible to prevent the brazing material 16 from flowing out onto the mounting surface 1204, which is advantageous in easily and reliably producing the third component 14 in which the first joining surface 1002 and the second joining surface 1202 are joined with sufficient joining strength. In this case, in order to easily visually confirm where the fillet 1602 is located within the recess 18 and to ensure the area of the mounting surface 1204, the angle θ at which an imaginary line L passing through an intersection point A between the cutout bottom surface 1214 and the second joint surface 1202 and an intersection point B between the cutout bottom surface 1214 and the mounting surface 1204 intersects with the second joint surface 1202 is preferably within a range of 30 degrees to 60 degrees, as shown in Fig. 4. In this embodiment, the angle is set to 45 degrees, and therefore the cutout bottom surface 1214 is formed as a 45-degree inclined surface. Furthermore, if the angle θ is less than 30 degrees, it becomes difficult to easily visually determine where the fillet 1602 is located within the recess 18, and if the angle θ exceeds 60 degrees, the degree to which the area of the mounting surface 1204 is reduced increases rapidly. Therefore, if the angle θ is within the range of 30 degrees to 60 degrees, it is advantageous in easily and reliably adjusting the weight of the brazing material 16 used to an appropriate weight, such as by slightly increasing or decreasing the weight.
[0011] Moreover, according to this embodiment, the third member 14 can be mass-produced as follows. Prior to mass production of the third member 14, multiple brazing materials 16 of different weights are prepared in advance, and multiple pairs of the first member 10 and the second member 12 are prepared with the first joining surface 1002 and the second joining surface 1202 butted against each other. As shown by imaginary lines in FIG. 3, round rod-shaped brazing materials 16 of different weights, for example different lengths, are placed in the recesses 18 of each pair, and brazing is performed in a furnace. Then, as shown in FIG. 4, a brazing material 16 having a weight such that the fillet 1602 remains within the recess 18 is selected. Then, a brazing material 16 having a weight such that the fillet 1602 remains within the recess 18 is used for mass production. Mass production of the third component 14 using this method ensures the bonding strength between the first bonding surface 1002 and the second bonding surface 1202, and also makes it possible to easily and reliably produce the third component 14 in which the brazing material 16 does not flow out onto the mounting surface 1204, which is advantageous in significantly reducing the cost of the third component 14.
[0012] Next, a second embodiment will be described with reference to FIG. In the following embodiment, the same parts and members as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified, and the description will focus on the differences. In the second embodiment, the shape of the cutout 1212 is different from that in the first embodiment. In FIG. 5(A), the cutout bottom surface 1214 is not a flat surface but is formed as a curved surface that protrudes in a direction away from the corner portion 1210 . In Figure 5 (B), the bottom surface 1214 of the notch is not a flat surface, but is formed by two flat surfaces: a bottom surface portion 1216 extending perpendicularly from the second joint surface 1202, and a side surface portion 1218 rising at a right angle from the end of the bottom surface portion 1216 and perpendicular to the mounting surface 1204. In either embodiment of Figures 5(A) and (B), in order to make the fillet 1602 in the recess 18 easily visible and to ensure the area of the mounting surface 1204, it is preferable that the angle θ at which imaginary line L passing through intersection point A between the bottom surface 1214 of the recess and the second joint surface 1202 and intersection point B between the bottom surface 1214 of the recess and the mounting surface 1204 intersects with the second joint surface 1202 is within the range of 30 degrees to 60 degrees, and is set to 45 degrees in this embodiment. According to the second embodiment, when the first bonding surface 1002 and the second bonding surface 1202 are butted together, a recess 18 that is open upward is formed by the notch 1212, which is advantageous in forming the volume of this recess 18 to be larger than that of the first embodiment. Therefore, even if there is variation in the weight of the brazing material 16 used when mass-producing the third component 14, the variation is absorbed within the recess 18, the bonding strength between the first bonding surface 1002 and the second bonding surface 1202 is ensured, and it is more advantageous in easily and reliably producing the third component 14 in which the brazing material 16 does not flow out onto the mounting surface 1204.
[0013] Next, a third embodiment will be described with reference to FIGS. The third embodiment, like the second embodiment, differs from the first embodiment in the shape of the cutout 1212. That is, the cutout bottom surface 1214 is not flat, but is provided in a stepped shape that is displaced upward in stages from the second joint surface 1202 . In FIG. 6(A), the cutout bottom surface 1214 is composed of three curved surfaces 1220 that are convex in a direction away from the corner 1210 and four protrusions 1222 located at the ends of the curved surfaces 1220. In FIG. 6(B), the bottom surface 1214 of the notch is composed of two curved surfaces 1220 that are convex in a direction away from the corner 1210, and three inclined surfaces 1224 located between and on both sides of the curved surfaces 1220. In FIG. 7(A), the cutout bottom surface 1214 is formed of three V-shaped grooves 1226 whose groove surfaces intersect at 90 degrees. In FIG. 7(B), the cutout bottom surface 1214 is configured with two V-grooves 1226 whose groove surfaces intersect at 90 degrees, and the base ends of the V-grooves 1226 are formed with an inclined surface 1224 . In FIG. 8(A), the cutout bottom surface 1214 is formed of three V-shaped grooves 1226 whose groove surfaces intersect at acute angles. In FIG. 8(B), the cutout bottom surface 1214 is formed by two V-grooves 1226 whose groove surfaces intersect at an acute angle, and the areas between and on both sides of these V-grooves 1226 are formed by inclined surfaces 1224. In all of the third embodiments shown in Figures 6 to 8, in order to make the fillet 1602 in the recess 18 easily visible and to ensure the area of the mounting surface 1204, it is preferable that the angle θ at which an imaginary line L passing through an intersection point A between the cutout bottom surface 1214 and the second joint surface 1202 and an intersection point B between the cutout bottom surface 1214 and the mounting surface 1204 intersects with the second joint surface 1202 is within the range of 30 degrees to 60 degrees, and is set to 45 degrees in this embodiment. In this way, by providing the bottom surface 1214 of the notch in a stepped shape that gradually displaces upward from a location of the second joining surface 1202 away from the corner 1210, it is easier to visually determine where the fillet 1602 is located within the recess 18, which is advantageous in adjusting the weight of the brazing material 16 used to an appropriate weight and is more advantageous in easily and reliably producing a third component 14 that ensures the joining strength between the first joining surface 1002 and the second joining surface 1202 while ensuring the area of the mounting surface 1204, and in which the brazing material 16 does not flow out onto the mounting surface 1204.
[0014] Next, a fourth embodiment will be described with reference to FIGS. In the first to fourth embodiments, the notch 1212 was provided along the entire length of the corner 1210 where the first joint surfaces 1002 are butted, but in the fifth embodiment, multiple (three) notches 1212 are provided at intervals in the extension direction of the corner 1210 where the first joint surfaces 1002 are butted. In the second member 12 shown in FIG. 10(A) in a side view, (B) in a front view, and in FIG. 11(A) in a plan view, the notch 1212 has an open rectangular shape on the second joining surface 1202 side when viewed in a plan view, and the third member 14 in which the first joining surface 1002 and the second joining surface 1202 are brazed in a furnace is shown in FIGS. 9(A) and (B). In the second member 12 shown in the plan view of Figure 11(B), the notch 1212 has an open semicircular arc shape on the second bonding surface 1202 side, and in the second member 12 shown in the plan view of Figure 11(C), the notch 1212 has an open V-shape on the second bonding surface 1202 side. In the fifth embodiment, various types of cutout bottom surfaces 1214 of the cutout portion 1212 can be adopted for the cutout bottom surface 1214 of the cutout portion 1212 in the first to fourth embodiments. As with the first to fourth embodiments, in order to make the fillet 1602 in the recess 18 easier to view and to ensure the area of the mounting surface 1204, it is preferable that the angle θ at which an imaginary line L passing through an intersection point A between the cutout bottom surface 1214 and the second joint surface 1202 and an intersection point B between the cutout bottom surface 1214 and the mounting surface 1204 intersects with the second joint surface 1202 is within the range of 30 degrees to 60 degrees, and is set to 45 degrees in this embodiment. According to the fifth embodiment, the volume of the recess 18 for storing excess solder material 16 other than that required for joining the first bonding surface 1002 and the second bonding surface 1202 is reduced. However, since a plurality of recesses 18 are provided at intervals in the extension direction of the corner portion 1210, the second bonding surface 1202 can be secured between adjacent recesses 18, unlike the first to fourth embodiments. Therefore, in addition to the advantageous effect of easily and reliably producing the third component 14 in which the brazing material 16 does not flow out onto the mounting surface 1204, it is also advantageous in increasing the area of the second bonding surface 1202 that is bonded to the first bonding surface 1002, and is therefore advantageous in increasing the bonding strength between the first component and the second component.
[0015] In this embodiment, the case has been described where the first bonding surface 1002 and the second bonding surface 1202 are both flat surfaces. However, the first bonding surface 1002 and the second bonding surface 1202 may be formed in a shape other than flat as long as they are shaped to fit together, such as a cylindrical surface or a spherical surface. [Explanation of symbols]
[0016] 10 First member 1002 1st joint surface 12 Second member 1202 Second joint surface 1204 Mounting surface 1206 hole 1208 Female thread 1210 Corner 1212 Missing part 1214 Bottom of missing part 1216 Bottom part 1218 Side part 1220 Curved Surface 1222 Protrusion 1224 Slope 1226 V groove 14 Third member 16 Brazing material 1602 Fillet 18 Recess
Claims
1. In a state where a second joint surface of a second member is butted against a first joint surface of a first member, the second member has an attachment surface that intersects with the second joint surface and faces upward, a method for producing a third member including the first member and the second member, the method comprising: joining the first joining surface and the second joining surface by furnace brazing while the first joining surface and the second joining surface are butted against each other, the method comprising the steps of: a notch is provided at a corner of the second joining surface and the mounting surface at a portion of the second joining surface that is abutted against the first joining surface, such that a recess that is open toward the second joining surface side and the mounting surface side and that is open upward when the first joining surface and the second joining surface are abutted against each other is formed, and the remaining area of the second joining surface that has been reduced by the notch is set to an area that provides sufficient joining strength when brazed to the first joining surface in a furnace; When the first joining surface and the second joining surface are joined by furnace brazing, the brazing material remaining after excluding the brazing material for joining the first joining surface and the second joining surface is stored in the recess, and the brazing material is prevented from flowing out to the mounting surface.
13. A method for producing a third member by furnace brazing a first member and a second member, comprising:
2. The first bonding surface and the second bonding surface are both formed as flat surfaces.
2. The method of claim 1, wherein the first and second components are furnace brazed to produce a third component.
3. The mounting surface is formed in a plane perpendicular to the second joint surface.
3. The method of claim 2, wherein the first and second members are furnace brazed to produce a third member.
4. The second joining surface has a width greater than that of the first joining surface, The notch is provided only at a portion of the second joint surface where the first joint surface is butted against the second joint surface.
3. The method of claim 2, wherein the first and second members are furnace brazed to produce a third member.
5. The first bonding surface and the second bonding surface are formed of curved surfaces that are joined to each other.
2. The method of claim 1, wherein the first and second components are furnace brazed to produce a third component.
6. The cutout portion is provided at intervals in the extending direction of the corner portion.
2. The method of claim 1, wherein the first and second components are furnace brazed to produce a third component.
7. the cutout has a cutout bottom surface connecting a portion of the second joint surface away from the corner portion and a portion of the mounting surface away from the corner portion, The angle at which an imaginary line passing through an intersection point between the bottom surface of the cutout portion and the second joint surface and an intersection point between the bottom surface of the cutout portion and the mounting surface 1204 intersects with the second joint surface is in the range of 30 degrees to 60 degrees.
2. The method of claim 1, wherein the first and second components are furnace brazed to produce a third component.
8. The bottom surface of the notch is provided in a stepped shape that is displaced upward in a stepwise manner from an intersection point between the bottom surface of the notch and the second joint surface.
8. The method of claim 7, further comprising furnace brazing a first member and a second member to produce a third member.
9. preparing a plurality of brazing materials having different weights before mass production of the third member, and brazing the first joining surface and the second joining surface in a furnace using the brazing materials; the brazing material remaining in the recess except for the brazing material for bonding the first bonding surface and the second bonding surface is used for mass production of the third member, the brazing material having a weight that remains in the recess.
2. The method of claim 1, wherein the first and second components are furnace brazed to produce a third component.
Citation Information
Patent Citations
Refrigerant distributor and heat pump device using the refrigerant distributor
JP2012013289A