JP2006026721A - Passage built-in mount and its production method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a passage built-in mount with a constitution where the generation of cracks in a welding line surrounding a groove and the corrosion of the welding line are prevented, and the sealing function of the welding line can be maintained, and to provide its production method. <P>SOLUTION: A plate 22 and a plate 23 are welded in such a manner that a groove 24 is surrounded by friction stir welding to form a welding line 28, and, in the space between the groove 24 and the welding line 28, a brazing filler metal 30 provided between the plate 22 and the plate 23 is melted with friction heat at the time when the welding line 28 is formed by the friction stir welding, thus the plate 22 and the plate 23 are brazed. Alternatively, a thermosetting adhesive is used instead of the brazing filler metal, and the thermosetting adhesive is set by the friction heat. Alternatively, a plurality of grooves 24 are surrounded by the welding line 28, and the plate 22 and the plate 23 are spot-welded at the central part within the welding line. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a channel-embedded pedestal and a method for manufacturing the same.

  The flow path built-in type pedestal is applied to various systems in various industrial fields, such as stationary fuel cell power generation systems such as fixed or in-vehicle use and flow system such as air brake system for trains. Has been. In other words, the flow channel built-in type pedestal is provided with various devices such as parts and devices constituting these systems on the surface of the pedestal, and provided with a built-in flow channel (groove) instead of the complicated piping connecting the devices ( The built-in flow path functions as the piping), and further, by incorporating electric wiring and the like, a fixed unit such as a household fuel cell power generation unit that is compactly integrated, an in-vehicle fuel cell power generation unit, etc. It is used to realize a movable unit.

  For example, in the fuel cell power generation system illustrated in FIG. 5, detailed description is omitted, but in addition to the fuel cell main body 54, a vaporizer 42, a desulfurization device 44, a CO converter 46, a reformer 49, an inverter 64, and the like attached thereto. The above-mentioned various devices and a large number of pipes and wirings for connecting them are provided. By applying a built-in channel-type pedestal thereto, a compactly integrated fuel cell power generation unit can be realized.

  Various specific configurations of the channel-embedded pedestal have already been proposed. For example, those disclosed in the following [Patent Document 1] can be cited. Here, based on FIGS. 6-8, the structural example of the conventional flow-path built-in type base is demonstrated. 6 is an exploded perspective view showing an outline of the overall configuration of a conventional channel built-in type pedestal, FIG. 7A is a plan view showing a part of the channel built-in type pedestal in detail, and FIG. 7A is a cross-sectional view taken along line AA in FIG. 7A, FIG. 7C is an enlarged cross-sectional view taken along line BB in FIG. 7A, and FIG. 8 is a plan view showing a configuration example of a number of grooves. is there.

  As shown in FIGS. 6 and 7, the flow path built-in pedestal 1 includes a plate 2 as a first plate and a second plate, and a plate 3 that are well-known by friction stir welding (FSW) as described in [Patent Document 2] below. ). Various devices 4 such as parts and devices constituting a fuel cell power generation system, a fluid control system, and the like are attached to one surface of the flow path built-in base 1, that is, the surface 2a of the plate 2 (FIG. 6). The device 4 on the plate surface 2a is indicated by a one-dot chain line). That is, the flow path built-in pedestal 1 functions as a pedestal for mounting the device 4. The device 4 is fastened together with the upper plates 2 and 3 by a planting bolt 5 which is implanted in the plate 3 and is inserted into the bolt hole 2b of the plate 2 and a nut 6 which is screwed into the planting bolt 5 and is a base. It is fixed to the surface (plate surface 2a).

  On the joint surface 3a of the plate 3, a plurality of grooves 7 are formed by appropriate processing means such as an end mill, a milling machine, or a drilling machine. Each of these grooves 7 has a predetermined cross-sectional area and is formed in an appropriate length and direction. The plate 2 is joined to the plate 3 so as to cover the groove 7 formed in the plate 3 (cover the groove 7). Thus, a fluid flow path composed of the grooves 7 is formed inside the flow path built-in base 1. In addition, communication holes 8 are formed in the plate 2, and the grooves 7 are communicated with the device 4 through these communication holes 8. That is, the channel-equipped pedestal 1 includes a plurality of grooves 7 as fluid channels, and these built-in channels (grooves 7) serve as piping for connecting the devices 4 to each other. Yes. That is, the flow path built-in pedestal 1 also functions as an integrated pipe. The cross-sectional area of each groove 7 (built-in flow path) is determined from the properties, flow velocity, pressure loss, etc. of the fluid flowing in each groove 7, and the length and direction of each groove 7 (built-in flow path) are determined by each device 4. It is decided by the arrangement etc. When the channel-equipped pedestal 1 is applied to a fuel cell power generation system or the like, actually, a large number of grooves 7 are complicatedly formed as shown in FIG. Simplified for illustration.

  As shown in FIG. 7, a weld line 10 is formed around the groove 7. This weld line 10 is formed by welding the plate 2 and the plate 3 so as to surround the periphery of the groove 7 by the friction stir welding, and at the same time functions as a joint for joining the plate 2 and the plate 3. It also functions as a seal part for preventing fluid flowing through the groove 7 from leaking between the plate 2 and the plate 3.

  Further, the welding line 10 is formed at a position keeping an appropriate distance f from the center of the groove 7. That is, an appropriate distance d is ensured between the weld line 10 and the groove 7. In the friction stir welding, the plate 2 and the plate 3 are joined by plastic flow due to frictional heat. At this time, if an attempt is made to form the weld line 10 at the edge of the groove 7, the influence of the frictional heat causes the effect of the groove 7. The wall surface 7 is plastically deformed up to the wall surface 7a. For this reason, an appropriate distance d is ensured between the welding line 10 and the groove 7 so as to prevent plastic deformation of the wall surface 7a due to the influence of the frictional heat.

JP 2002-372198 A Japanese Patent No. 2792233

  However, in the conventional flow path built-in pedestal 1, when the distance d is ensured between the weld line 10 and the groove 7 as described above, the plate 2 Since the plate 3 is not bonded, a minute gap is generated between the plate 2 and the plate 3.

  For this reason, when the stress is repeatedly applied to the groove 7 (plates 2 and 3) due to the pressure of the fluid flowing through the groove 7 and the like, the gap acts as a notch, which may reduce the life. Further, there is a possibility that the fluid flowing in the groove 7 enters the gap and generates contamination.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a flow path built-in pedestal having a configuration capable of maintaining a sealing function of a weld line and a method for manufacturing the same.

The channel-embedded pedestal of the first invention that solves the above-mentioned problem is formed by joining at least two first plates and second plates by friction stir welding, and the first plate or the second plate In the channel built-in type pedestal in which the groove formed in the joining surface is built in as a fluid flow channel, and the device is attached to the pedestal surface on one side or both sides,
A welding line formed by welding the first plate and the second plate so as to surround the periphery of the groove by the friction stir welding;
The first plate and the second plate are brazed between the groove and the weld line.

Further, the channel-embedded pedestal of the second invention is formed by joining at least two of the first plate and the second plate by friction stir welding, and is attached to the joining surface of the first plate or the second plate. In the built-in channel type pedestal in which the formed groove is built in as a fluid channel and the device is attached to the pedestal surface on one side or both sides,
A welding line formed by welding the first plate and the second plate so as to surround the periphery of the groove by the friction stir welding;
The first plate and the second plate are bonded with an adhesive between the groove and the weld line.

Further, the flow path built-in pedestal of the third invention is the flow path built-in pedestal of the first or second invention,
The weld line surrounds a plurality of the grooves, and the first plate and the second plate are spot-welded at the center in the weld line.

According to a fourth aspect of the present invention, there is provided a manufacturing method of a flow path built-in type pedestal, wherein at least two first plates and second plates are joined by friction stir welding, and the first plate or the second plate A flow path built-in pedestal manufacturing method in which a groove formed in the joint surface is built in as a fluid flow path, and a device is attached to the pedestal surface on one or both sides,
Welding the first plate and the second plate so as to surround the groove by the friction stir welding to form a weld line;
Between the groove and the weld line, by melting the brazing material provided between the first plate and the second plate with frictional heat when forming the weld line by the friction stir welding, The first plate and the second plate are brazed.

According to a fifth aspect of the present invention, there is provided a manufacturing method of a flow path built-in pedestal, wherein at least two first plates and second plates are joined by friction stir welding, and the first plate or the second plate A flow path built-in pedestal manufacturing method in which a groove formed in the joint surface is built in as a fluid flow path, and a device is attached to the pedestal surface on one or both sides,
Welding the first plate and the second plate so as to surround the groove by the friction stir welding to form a weld line;
Between the groove and the weld line, a thermosetting adhesive provided between the first plate and the second plate is cured by friction heat when the weld line is formed by the friction stir welding. By doing so, the first plate and the second plate are bonded together.

Moreover, the manufacturing method of the flow path type pedestal of the sixth invention is the manufacturing method of the flow path built type pedestal of the first or second invention,
The weld line surrounds a plurality of the grooves, and the first plate and the second plate are spot-welded at a central portion in the weld line.

  According to the flow path built-in type pedestal of the first aspect of the present invention, it has a weld line formed by welding the first plate and the second plate so as to surround the periphery of the groove by friction stir welding, and the groove and the weld line Since the first plate and the second plate are brazed between the groove and the weld line, the first plate and the second plate are By not forming a minute gap between them, the notch effect due to the gap does not occur, and the fluid flowing through the groove does not enter the gap. Therefore, the pressure strength and durability can be improved. And since brazing can be performed effectively using the frictional heat at the time of forming a weld line by friction stir welding, the efficiency of manufacturing work can also be achieved.

  According to the flow path built-in type pedestal of the second aspect of the present invention, it has a weld line formed by welding the first plate and the second plate so as to surround the periphery of the groove by friction stir welding, and the groove and the weld Since the first plate and the second plate are bonded to each other with an adhesive, the first plate and the second plate are between the groove and the weld line. Since a minute gap does not occur between the two plates, the notch effect due to the gap does not occur, and the fluid flowing through the groove does not enter the gap. Therefore, the pressure strength and durability can be improved.

  According to the pedestal with a built-in flow path of the third invention, the weld line surrounds the plurality of grooves, and the first plate and the second plate are spot-welded at the center in the weld line. Therefore, even if the periphery of the plurality of grooves is surrounded by a welding line, the center portion in the welding line swells due to the reinforcement of the spot welding (the gap between the first plate and the second plate increases). It can be surely prevented.

  According to the manufacturing method of the flow path built-in type pedestal of the fourth invention, the first plate and the second plate are welded so as to surround the groove by friction stir welding to form a weld line, and the groove and the Between the weld lines, the brazing material provided between the first plate and the second plate is melted by the frictional heat generated when the weld line is formed by the friction stir welding, whereby the first plate And the second plate are brazed so that no minute gap is formed between the first plate and the second plate between the groove and the weld line. The notch effect due to the gap does not occur, and the fluid flowing through the groove does not enter the gap. Therefore, the pressure strength and durability can be improved. Moreover, since the brazing is performed by effectively using the frictional heat at the time of forming the weld line by friction stir welding, the efficiency of the manufacturing work can be improved.

  Further, according to the manufacturing method of the flow path built-in type pedestal of the fifth invention, a weld line is formed by welding the first plate and the second plate so as to surround the periphery of the groove by friction stir welding, Between the groove and the weld line, a thermosetting adhesive provided between the first plate and the second plate is cured by friction heat when the weld line is formed by the friction stir welding. Thus, the first plate and the second plate are bonded to each other. Therefore, a minute amount is provided between the groove and the weld line between the first plate and the second plate. Since the gap does not occur, the notch effect due to the gap does not occur, and the fluid flowing through the groove does not enter the gap. Therefore, the pressure strength and durability can be improved. In addition, since the bonding is performed by effectively using the frictional heat when forming the weld line by friction stir welding, the efficiency of the manufacturing operation can be improved.

  According to the sixth aspect of the invention, the welding line surrounds the plurality of grooves, and the joint surface between the first plate and the second plate is spotted at the center of the welding line. Since welding is performed, even if the periphery of the plurality of grooves is surrounded by a weld line, the center portion in the weld line expands due to the reinforcement of the spot welding (the gap between the first plate and the second plate is increased). Can be reliably prevented.

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

  1A is a cross-sectional view (a cross-sectional view taken along the line CC of FIG. 1B) showing a method for manufacturing a channel-embedded pedestal according to an embodiment of the present invention, and FIG. FIG. 1C is a plan view showing a manufacturing method of the channel-embedded pedestal (a view taken in the direction of arrow D in FIG. 1A), and FIG. 1C is an enlarged cross-sectional view taken along the line E-E in FIG. 2 (a) is a plan view showing the configuration of the channel-embedded pedestal, FIG. 2 (b) is an enlarged cross-sectional view taken along line FF in FIG. 2 (a), and FIG. 2 (c) is FIG. It is a GG arrow cross-sectional enlarged view of a).

  Based on FIG.1 and FIG.2, the manufacturing method and structure of the flow-path built-in type base 21 of the present Example are demonstrated.

  The flow path built-in type base 21 of this embodiment is formed by joining a plate 22 as a first plate and a second plate and a plate 23 by friction stir welding (FSW). In order to join and integrate these plates 22 and 23 by friction stir welding (FSW), first, the plates 22 and 23 are overlapped.

  The joint surface 23a of the plate 23 is a flow path for flowing a liquid or gaseous fluid necessary for a system (for example, a fuel cell power generation system or a fluid control system) to which the flow path built-in base 21 is applied. The groove 24 is processed in advance by an appropriate processing means such as an end mill, a milling machine, or a drilling machine. When the flow path built-in pedestal 21 is applied to a fuel cell power generation system or the like, actually, a number of grooves 24 are complicatedly formed as shown in FIG. Simplified for illustration.

  Further, the plate 22 has a communication hole 25 for communicating various devices (not shown) such as system components and components attached to the surface 22a of the plate 22 serving as a pedestal surface on one side with the groove 24. However, it is processed in advance by appropriate processing means. The cross-sectional area of each groove 24 (built-in flow path) is determined from the properties, flow velocity, pressure loss, etc. of the fluid flowing in each groove 24. The length and direction of each groove 24 (built-in flow path) are It is decided by arrangement.

  The groove 24 is not limited to the bonding surface 23 a of the plate 23, and may be formed on the bonding surface 22 b of the plate 22, and the communication hole 25 may be formed on the plate 23 instead of the plate 22. Further, the device is not limited to the surface 22a of the plate 22, but may be provided on the surface 23b of the plate 23 serving as the other one-side pedestal surface, or may be provided on both pedestal surfaces (plate surfaces 22a, 23b).

  Further, a stepped portion 29 that is slightly lower (dented) than the other portion of the joining surface 23a is formed on the joining surface 23a of the plate 23 in advance along the entire peripheral edge of the groove 24 by an appropriate processing means. The brazing material 30 is provided on the stepped portion 29. The stepped portion 29 is formed 31 (range from the edge of the groove 24 to the front of the weld line 28) between the groove 24 and the weld line 28 (details will be described later). Accordingly, the brazing material 30 provided in the stepped portion 29 is naturally also arranged between the groove 24 and the weld line 28 (range from the edge of the groove 24 to the front of the weld line 28).

  For this reason, when the plates 22 and 23 are overlapped, the brazing filler metal 30 is interposed between the plate 22 and the plate 23 at the interval 31 between the groove 24 and the weld line 28. The brazing material 30 is provided on the stepped portion 29. If the brazing material is provided on the joining surface 23a of the flat plate 23 without forming the stepped portion 29, the plate is formed at a portion other than the portion where the brazing material is provided. This is to prevent a gap due to the brazing material from being generated between the plate 22 and the plate 23.

  As a material for the plates 22 and 23, an appropriate material such as an aluminum alloy plate, a copper plate, or a stainless steel plate can be used. However, since the brazing material 30 needs to be reliably melted by frictional heat of friction stir welding described later, It is necessary to select a material having a lower melting point than the materials of 22 and 23.

  Then, after the brazing material 30 is interposed between the plates 22 and 23 by overlapping the plates 22 and 23, the tip tool 27 of the friction stir welding machine 26 is moved to the starting point of the friction stir welding. Position J and start rotation, and pressurize in the axial direction (plate thickness direction position of the plates 22 and 23) as indicated by the arrow H, and the height direction position (plate) suitable for the integration of the plates 22 and 23 22 and 23 in the plate thickness direction position). That is, the tip tool 27 can be inserted into the plate 22 by the frictional heat generated between the tip tool 27 and the plate 22 due to the rotation of the tip tool 27 so that the tip tool 27 can be inserted into the plate 22 (in some cases, the plate 23 The tip tool 27 may be inserted up to).

  Subsequently, the tip tool 27 is rotated and moved along the peripheral edge of the groove 24 in the direction orthogonal to the insertion direction as indicated by the arrow H. As a result, the plate 22 and the plate 23 are welded in a plastic flow state due to frictional heat generated by the rotation of the tip tool 27, thereby forming a weld line 28. FIG. 1 shows a state in which friction stir welding is performed halfway along the entire periphery of the groove 24.

  Thereafter, the friction stir welding is further continued, so that a welding line 28 surrounding the groove 24 is finally formed as shown in FIG. The weld line 28 functions as a joint portion for joining the plate 22 and the plate 23, and also functions as a seal portion for preventing fluid flowing through the groove 7 from leaking between the plate 22 and the plate 23.

  However, in order to prevent the wall surface 24a of the groove 24 from being plastically deformed by frictional heat during friction stir welding, the welding line 28 is not at the edge of the groove 24 but at an appropriate distance f from the center of the groove 24. An appropriate distance d is secured between the weld line 28 and the groove 24.

  And at the same time as forming the welding line 28 at such a position by friction stir welding, the brazing material 30 interposed between the plates 22 and 23 is friction when the welding line 28 is formed by the friction stir welding. It is melted by heat (the molten brazing material 30 is filled in the gap between the plates 22 and 23). As a result, the plate 22 and the plate 23 are brazed by the brazing material 30 between the groove 24 and the weld line 28. Therefore, a minute gap is not formed between the plate 22 and the plate 23 between the groove 24 and the weld line 28, so that the fluid flowing through the groove 24 is not caused by the notch effect due to the gap. It does not enter the gap.

  By the way, when welding is performed so as to surround the periphery of the groove 24, the position of the welding line 28 is basically based on the position of each groove 24 formed on the plate 23 so as to surround the periphery of each groove 24. Designed to. However, the present invention is not limited to this. Depending on the position of each groove 24 on the plate 23, the properties of the fluid flowing through each groove 24, and the like, a plurality of grooves 24 having the same characteristics are grouped into one group. You may make it surround the circumference | surroundings by the welding line 28 every time.

  FIG. 3A is a plan view showing a configuration example of a pedestal with a built-in channel in the case where the circumference of two grooves is surrounded by a weld line, and FIG. 3B is a view taken along the line KK in FIG. FIG. 4A is an enlarged cross-sectional view, FIG. 4A is a plan view showing another example of a channel-embedded pedestal in the case where three grooves are surrounded by a weld line, and FIG. 4B is an L diagram in FIG. 4A. FIG.

  In FIG. 3, the weld line 28 is formed by welding the plate 22 and the plate 23 by friction stir welding so as to surround the periphery of the three grooves 24 having the same characteristics in terms of position and fluid properties. Also in this case, a step portion 29 is formed on the joint surface 23a of the plate 23 in a region 31 between the groove 24 and the weld line 28 (range from the edge of the groove 24 to the front of the weld line 28). A brazing material 30 provided at 29 is interposed between the plate 22 and the plate 23.

  When the weld line 28 is formed by friction stir welding, the brazing material 30 interposed between the plates 22 and 23 is simultaneously melted by the friction heat of the friction stir welding (melted in the gap between the plates 22 and 23). Filled with brazing material 30). As a result, the plate 22 and the plate 23 are brazed by the brazing material 30 between the groove 24 and the weld line 28. Accordingly, also in this case, a minute gap is not generated between the plate 22 and the plate 23 at the gap 31 between the groove 24 and the weld line 28, so that the notch effect due to the gap does not occur, and the groove 24 is formed. The flowing fluid does not enter the gap.

  In the illustrated example, a stepped portion 29 is formed on the joint surface 23 a of the plate 23 between the two grooves 24, and the brazing material 30 provided on the stepped portion 29 is connected to the plate 22 and the plate 23. Is intervening. Therefore, since the brazing material 30 is also melted by the frictional heat of the friction stir welding, the plate 22 and the plate 23 are brazed by the brazing material 30 even between the two grooves 24. . However, the present invention is not limited to this. For example, when the same kind of fluid is flowing in the two grooves 24, the sealing property between the two grooves 24 is not particularly questioned. Does not have to braze the plate 22 and the plate 23 between the two grooves 24.

  In FIG. 4, the weld line 28 is formed by welding the plate 22 and the plate 23 by friction stir welding so as to surround the periphery of the three grooves 24 having the same characteristics in terms of position and fluid properties. Also in this case, a step portion 29 is formed on the joint surface 23a of the plate 23 in a region 31 between the groove 24 and the weld line 28 (range from the edge of the groove 24 to the front of the weld line 28). A brazing material 30 provided at 29 is interposed between the plate 22 and the plate 23.

  When the weld line 28 is formed by friction stir welding, the brazing material 30 interposed between the plates 22 and 23 is simultaneously melted by the friction heat of the friction stir welding (melted in the gap between the plates 22 and 23). Filled with brazing material 30). As a result, the plate 22 and the plate 23 are brazed by the brazing material 30 between the groove 24 and the weld line 28. Accordingly, also in this case, a minute gap is not generated between the plate 22 and the plate 23 at the gap 31 between the groove 24 and the weld line 28, so that the notch effect due to the gap does not occur, and the groove 24 is formed. The flowing fluid does not enter the gap.

  Further, in the illustrated example, a stepped portion 29 is formed on the joint surface 23 a of the plate 23 between each of the three grooves 24, and the brazing material 30 provided on the stepped portion 29 is connected to the plate 22 and the plate 23. It is interposed between Accordingly, since the brazing material 30 is also melted by the frictional heat of the friction stir welding, the plate 22 and the plate 23 are brazed by the brazing material 30 between the two grooves 24. Yes. However, the present invention is not limited to this. For example, when the same kind of fluid is flowing in the three grooves 24, the sealing property between the two grooves 24 is not particularly questioned. Does not have to braze the plate 22 and the plate 23 between each of the three grooves 24.

  On the other hand, when the welding wire 28 is formed by friction stir welding, the brazing material 30 does not sufficiently transmit the frictional heat, or brazing becomes insufficient, or by not performing brazing, If there is a concern that the central portion (between adjacent grooves 24) will swell (the gap between the plates 22 and 23 will increase), the central portion (between adjacent grooves 24) in the weld line 28 Further, it may be reinforced by spot welding by an appropriate welding means such as hybrid welding or friction stir welding which is a welding method in which the arc electrode and the laser beam are coaxially combined. Reference numeral 32 in FIG. 4 denotes a spot weld at this time.

  Furthermore, although illustration is omitted, instead of the brazing filler metal 30, an adhesive is used, and the plate 22 and the plate 22 between the groove 24 and the weld line 28 (range from the edge of the groove 24 to the front of the weld line 28). 23 may be bonded together. In addition, since it is the same as that of the above about the structure and manufacturing method of the flow-path built-in type base 21 except using an adhesive agent instead of the brazing material 30 (refer FIGS. 1-4), description here is abbreviate | omitted. .

  In this case, it is necessary to use a heat-resistant adhesive such as heat transfer cement or ceramic cement in consideration of durability against frictional heat of friction stir welding. From the viewpoint of effectively using frictional heat when forming the weld line 28 by friction stir welding, it is also effective to use a thermosetting adhesive.

  That is, when the weld line 28 is formed by welding the plate 22 and the plate 23 so as to surround the periphery of one or a plurality of grooves 24 by friction stir welding, a space 31 between the groove 24 and the weld line 28 is: By curing the thermosetting adhesive provided between the plate 22 and the plate 23 with frictional heat when forming the weld line 28 by the friction stir welding, the plate 22 and the plate 23 are You may make it adhere | attach.

  As described above, according to the flow path built-in pedestal 21 of the embodiment of the present invention, the welding line 28 formed by welding the plate 22 and the plate 23 so as to surround the periphery of the groove 24 by friction stir welding is provided. Since the plate 22 and the plate 23 are brazed to each other between the groove 24 and the weld line 28, the gap 31 between the groove 24 and the weld line 28 is between the plate 22 and the plate 23. Since the minute gap does not occur, the notch effect due to the gap does not occur, and the fluid flowing through the groove 24 does not enter the gap. Therefore, the pressure strength and durability can be improved. Moreover, since the brazing can be performed by effectively using the frictional heat when forming the weld line 28 by friction stir welding, the efficiency of the manufacturing operation can be improved.

  By the way, when providing the brazing material 30, it is conceivable to provide not only from the edge of the weld line 24 to the front of the weld line 28 but also to the weld line 28 and further to the outside of the weld line 28. However, in order to eliminate the notch effect of the gap between the plates 22 and 23 and the intrusion of fluid into the gap and improve the pressure strength and durability, the gap between the plates 22 and 23 at the edge of the groove 24 is used. Therefore, it is sufficient if the brazing material 30 is provided between the groove 24 and the weld line 28 (in a range from the edge of the groove 24 to the front of the weld line 28), and at least the groove 24 side is brazed. There is no particular problem even if there is an unbrazed portion on the weld line 28 side. Accordingly, by providing the brazing material 30 between the groove 24 and the weld line 28 (range from the edge of the groove 24 to the front of the weld line 28) as described above, the brazing material 30 can be effectively used without waste. Can do. Furthermore, since the brazing filler metal 30 is not mixed into the materials of the plates 22 and 23 when the weld line 8 is formed by friction stir welding, better welding can be performed.

  Further, according to the flow path built-in type pedestal 21 of the present embodiment, the welding line 28 is formed by welding the plate 22 and the plate 23 so as to surround the periphery of the groove 24 by friction stir welding. 31 between the groove 22 and the weld line 28, even when the plate 22 and the plate 23 are bonded with an adhesive, the gap 31 between the groove 24 and the weld line 28 is very small between the plate 22 and the plate 23. Since no gap is generated, the notch effect due to the gap does not occur, and the fluid flowing through the groove 24 does not enter the gap. Therefore, the pressure strength and durability can be improved.

  Further, according to the flow path built-in base 21 of the present embodiment, the weld line 28 surrounds the periphery of a plurality of (in the illustrated example, two or three) grooves 24, and the center in the weld line 28. In the case where the plate 22 and the plate 23 are spot welded, even if the periphery of the plurality of grooves 24 is surrounded by a weld line, the center portion in the weld line 28 swells due to the reinforcement of the spot welding (the plates 22 and 23). It is possible to reliably prevent the gap between them from increasing).

  Moreover, according to the manufacturing method of the flow path built-in type pedestal 21 of the present embodiment, the plate 22 and the plate 23 are welded so as to surround the periphery of the groove 24 (one or more) by friction stir welding. The weld line 28 is formed, and the space 31 between the groove 24 and the weld line 28 is melted by the frictional heat generated when the weld line 28 is formed by friction stir welding of the brazing material 30 provided between the plate 22 and the plate 23. Thus, in order to braze the plate 22 and the plate 23, there is no minute gap between the plate 22 and the plate 23 between the groove 27 and the weld line 27. The notch effect does not occur, and the fluid flowing through the groove 24 does not enter the gap. Therefore, the pressure strength and durability can be improved. Moreover, since the brazing is performed by effectively using the frictional heat at the time of forming the weld line 28 by friction stir welding, the efficiency of the manufacturing work can be improved.

  Moreover, according to the manufacturing method of the flow path built-in type pedestal 21 of the present embodiment, the welding line 28 is formed by welding the plate 22 and the plate 23 so as to surround the groove 24 by friction stir welding, The space 31 between the groove 24 and the weld line 28 is obtained by curing the thermosetting adhesive provided between the plate 22 and the plate 23 with frictional heat when forming the weld line 28 by friction stir welding. Since the plate 22 and the plate 23 are bonded to each other, the gap 31 between the groove 27 and the weld line 27 does not cause a minute gap between the plate 22 and the plate 23, thereby A notch effect does not occur, and the fluid flowing through the groove does not enter the gap. Therefore, the pressure strength and durability can be improved. In addition, since the bonding is performed by effectively using the frictional heat when forming the weld line 28 by friction stir welding, the efficiency of the manufacturing operation can be improved.

  Moreover, according to the manufacturing method of the flow path built-in type pedestal 21 of the present embodiment, the welding line 28 surrounds a plurality of (in the illustrated example, two or three) grooves 24, Since the plate 22 and the plate 23 are spot welded at the center, even if the periphery of the plurality of grooves 24 is surrounded by the weld line 28, the center of the weld line 28 expands due to the reinforcement of the spot welding (the plates 22, 23). It is possible to reliably prevent the gap between them from increasing).

  The channel-embedded pedestal 21 in the above embodiment is formed by joining two plates 22 and 23. However, the present invention is not necessarily limited to this, and the present invention includes three or more plates. It can also be applied to a pedestal with a built-in channel.

  Further, in the flow path type pedestal 21 of the above embodiment, the brazing material 30 is provided in advance on the plate 23, but the present invention is not limited to this, and the brazing material 30 may be provided in advance on the plate 22. .

  The present invention relates to a pedestal with a built-in flow path and is useful when applied to maintain a sealing function of a weld line.

(A) is sectional drawing (C-C arrow sectional drawing of (b)) which shows the manufacturing method of the flow-path built-in type base which concerns on the embodiment of this invention, (b) is the said flow-path built-in type base. The top view (D direction arrow directional view of (a)) which shows the manufacturing method of (a), (c) is the EE arrow directional cross-sectional enlarged view of (b). (A) is a top view which shows the structure of the said flow-path built-in type base, (b) is the FF arrow directional cross-sectional enlarged view of (a), (c) is the GG arrow directional cross-section of (a). It is an enlarged view. (A) is a top view which shows the structural example of the flow-path built-in type base in the case of surrounding the circumference | surroundings of two groove | channels with a weld line, (b) is a KK arrow sectional enlarged view of (a). (A) is a top view which shows the other example of a flow-path built-in type base in the case of surrounding the circumference | surroundings of three groove | channels with a welding line, (b) is an LL arrow cross-sectional enlarged view of (a). . It is a block diagram of a fuel cell power generation system. It is a disassembled perspective view which shows the outline | summary of the whole structure of the conventional flow-path built-in type base. (A) is a top view which shows a part of said flow-path built-in type base in detail, (b) is the sectional view on the AA line of (a), (c) is the BB line arrow of (a). FIG. It is a top view which shows the structural example of many grooves.

Explanation of symbols

21 Plate Built-in Type Base 22 Plate 22a Surface 22b Joint Surface 23 Plate 23a Joint Surface 23b Surface 24 Groove 25 Communication Hole 26 Friction Stir Welding Machine 27 Tip Tool 28 Weld Line 29 Stepped Part 30 Brazing Material 31 Between Groove and Weld Line 32 Spot weld

Claims (6)

At least two first plates and second plates are joined by friction stir welding, and a groove formed on the joining surface of the first plate or the second plate is built in as a fluid flow path, and In the pedestal with a built-in flow path in which equipment is attached to the pedestal surface on one side or both sides,
A welding line formed by welding the first plate and the second plate so as to surround the periphery of the groove by the friction stir welding;
The channel-embedded base, wherein the first plate and the second plate are brazed between the groove and the weld line. At least two first plates and second plates are joined by friction stir welding, and a groove formed on the joining surface of the first plate or the second plate is built in as a fluid flow path, and In the pedestal with a built-in flow path in which equipment is attached to the pedestal surface on one side or both sides,
A welding line formed by welding the first plate and the second plate so as to surround the periphery of the groove by the friction stir welding;
The channel-embedded pedestal, wherein the first plate and the second plate are bonded with an adhesive between the groove and the weld line. In the pedestal with a built-in channel according to claim 1 or 2,
The pedestal with a built-in channel, wherein the weld line surrounds a plurality of the grooves, and the first plate and the second plate are spot-welded at a central portion in the weld line. At least two of the first plate and the second plate are joined by friction stir welding, and a groove formed in the joining surface of the first plate or the second plate is built in as a fluid flow path, And it is a manufacturing method of a channel built-in type pedestal in which equipment is attached to the pedestal surface on one side or both sides,
Welding the first plate and the second plate so as to surround the groove by the friction stir welding to form a weld line;
Between the groove and the weld line, by melting the brazing material provided between the first plate and the second plate with frictional heat when forming the weld line by the friction stir welding, A method for manufacturing a channel-embedded pedestal, wherein the first plate and the second plate are brazed. At least two of the first plate and the second plate are joined by friction stir welding, and a groove formed in the joining surface of the first plate or the second plate is built in as a fluid flow path, And it is a manufacturing method of a channel built-in type pedestal in which equipment is attached to the pedestal surface on one side or both sides,
Welding the first plate and the second plate so as to surround the groove by the friction stir welding to form a weld line;
Between the groove and the weld line, a thermosetting adhesive provided between the first plate and the second plate is cured by friction heat when the weld line is formed by the friction stir welding. Thereby, the first plate and the second plate are bonded to each other. In the manufacturing method of the channel-embedded pedestal according to claim 1 or 2,
The weld line surrounds a plurality of the grooves, and the first plate and the second plate are spot-welded at a central portion in the weld line.

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