JP5965534B1 - Jig for producing a hot-pressure joined body, a set of jigs for producing a hot-pressure joined body, a device for producing a hot-pressure joined body, and a method for producing a hot-pressure joined body - Google Patents

Abstract

[PROBLEMS] To shorten the time required for production of a hot-pressure bonded body. A work has an outer peripheral surface that surrounds an axis. A jig for producing a hot-pressure bonded body has a first structure that transmits to a workpiece a force that pushes the workpiece in a direction parallel to the axis of the workpiece, and is tubular and has a through-hole facing the outer peripheral surface of the workpiece. And a second structure. [Selection] Figure 5

Description

  The present invention relates to the production of a hot-pressure bonded body.

  When one member and another member are hot-pressure bonded, a workpiece in which a brazing material is sandwiched between the one member and another member is prepared. In addition, the prepared workpiece is heated, and the brazing material is pressed between one member and the other member in a state where the workpiece is heated. As a result, an interface layer is formed at the interface between the brazing material and the one member, an interface layer is formed at the interface between the brazing material and the other member, and the one member is thermally pressed to the other member via the brazing material. Be joined.

  In the production of a hot-press bonded body, a jig is often used for the purpose of uniformly hot-pressing one member to another member. The hot-pressure joining jig described in Patent Document 1 is an example.

Japanese Patent Publication No. 7-5394

  In a jig for producing a conventional hot-pressure bonded body represented by the hot-pressure bonding jig described in Patent Document 1, the jig prevents the work from being heated, and the time required for heating the work becomes longer. There has been a problem that the time required for production of the hot-pressure bonded body becomes long.

  The present invention aims to solve this problem. The problem to be solved by the present invention is to shorten the time required for production of a hot-pressed bonded body.

The workpiece has an outer peripheral surface that surrounds the axis. A jig for producing a hot-pressure bonded body has a first structure that transmits to a workpiece a force that pushes the workpiece in a direction parallel to the axis of the workpiece, and is tubular and has a through-hole facing the outer peripheral surface of the workpiece. And a second structure. The first structure is coupled to the upper end of the second structure. The through hole formed in the second structure is formed in a portion facing the outer peripheral surface of the workpiece.

  Since the electromagnetic wave propagates through the through hole to the outer peripheral surface of the workpiece, the workpiece can be heated in a short time by radiant heat transfer. The time required for heating the workpiece is shortened, and the time required for producing the hot-press bonded body is shortened.

It is a schematic diagram which shows the cross section of a sodium-sulfur battery. It is a schematic diagram which shows a hot press bonded body. It is a schematic diagram which shows the cross section of the apparatus which produces a hot press bonded body. It is a schematic diagram which shows the cross section of the apparatus which produces a hot press bonded body. It is a schematic diagram which shows cross sections, such as a group of jigs. It is a flowchart which shows the procedure which produces a hot-pressing joined body.

1 Sodium-sulfur battery The schematic diagram of FIG. 1 shows a cross section of a sodium-sulfur battery.

  As shown in FIG. 1, the sodium-sulfur battery 1000 includes a storage container 1020, a safety tube 1021, a solid electrolyte tube 1022, a positive electrode container 1023, a sheath tube 1024, a negative electrode active material 1025, a positive electrode active material 1026, an insulating ring 1027, A bonding material 1028, a negative electrode metal fitting 1029, a bonding material 1030, a positive electrode metal fitting 1031, a bonding material 1032, a backup ring 1033, a negative electrode lid 1034, and a positive electrode terminal 1035 are provided. The sodium-sulfur battery 1000 may include components other than these components. Some parts other than these components may be omitted from the sodium-sulfur battery 1000.

  The storage container 1020 is stored in the safety tube 1021. The safety tube 1021 is accommodated in the solid electrolyte tube 1022. The solid electrolyte tube 1022 is accommodated in the positive electrode container 1023. The positive electrode container 1023 is accommodated in the sheath tube 1024.

  The negative electrode active material 1025 is stored in the storage container 1020 and supplied from the storage container 1020 to the gap 1040 between the safety tube 1021 and the solid electrolyte tube 1022. The positive electrode active material 1026 is accommodated in a gap 1060 between the solid electrolyte tube 1022 and the positive electrode container 1023. The solid electrolyte tube 1022 is in contact with the negative electrode active material 1025 and the positive electrode active material 1026 and separates the negative electrode active material 1025 and the positive electrode active material 1026. As a result, an electrochemical reaction occurs between the negative electrode active material 1025 and the positive electrode active material 1026 via the solid electrolyte tube 1022, and an electromotive force is generated.

  The solid electrolyte tube 1022 is made of a sodium ion conductor, and is preferably made of a β-alumina ceramic. The negative electrode active material 1025 contains sodium. The positive electrode active material 1026 includes sodium sulfide.

  The negative electrode lid 1034 also serves as a negative electrode terminal and is electrically connected to the negative electrode fitting 1029. As a result, a conductive path 1220 including the negative electrode fitting 1029 and the negative electrode lid 1034 is formed. The positive terminal 1035 is electrically connected to the positive metal fitting 1031. As a result, a conductive path 1240 including the positive electrode fitting 1031 and the positive electrode terminal 1035 is formed.

2 Hot-Pressure Bonded Body The schematic diagram of FIG. 2 shows an enlarged view of the hot-pressure bonded body provided in the sodium-sulfur battery.

  As shown in FIG. 2, the hot-pressure bonded body 1070 includes a solid electrolyte tube 1022, an insulating ring 1027, a bonding material 1028, a negative electrode fitting 1029, a bonding material 1030, a positive electrode fitting 1031, a bonding material 1032, and a backup ring 1033. In the hot-pressure bonded body 1070, the negative electrode fitting 1029 is hot-pressure bonded to the insulating ring 1027 via the bonding material 1028, the positive electrode fitting 1031 is hot-pressure bonded to the insulating ring 1027 via the bonding material 1030, and the backup ring 1033 is bonded. It is hot-pressure bonded to the negative electrode fitting 1029 through the material 1032. The hot-pressure bonded body 1070 may include components other than these components. Some of these components may be omitted from the hot-pressure bonded body 1070.

  The negative electrode fitting 1029 includes a flange 1080. The lower surface 1100 of the flange 1080 is hot-pressure bonded to the upper surface 1120 of the insulating ring 1027 via the bonding material 1028. The positive electrode fitting 1031 includes a flange 1140. The upper surface 1170 of the flange 1140 is hot-pressure bonded to the lower surface 1121 of the insulating ring 1027 via the bonding material 1030. The negative electrode fitting 1029 and the positive electrode fitting 1031 are insulated from each other by the insulating ring 1027. The insulating ring 1027 is preferably made of α-alumina ceramics.

  The lower surface 1160 of the backup ring 1033 is hot-pressure bonded to the upper surface 1101 of the flange 1080 via the bonding material 1032. The backup ring 1033 is made of the same material as the insulating ring 1027. Thereby, the flange 1080 is sandwiched between the insulating ring 1027 and the backup ring 1033 made of the same material, and the stress generated when the material of the negative electrode fitting 1029 is different from the material of the insulating ring 1027 is suppressed.

  The inner peripheral surface 1180 of the insulating ring 1027 is glass-bonded in the vicinity of the open end 1200 of the solid electrolyte tube 1022.

  Each of the bonding materials 1028, 1030 and 1032 has a ring shape and is made of an aluminum brazing material.

3 Apparatus for producing a hot-pressure bonded body Each of the schematic view of FIG. 3 and the schematic view of FIG. 4 shows a cross section of an apparatus for producing a hot-pressure bonded body.

  The apparatus 1300 for producing a hot-pressure bonded body shown in each of FIGS. 3 and 4 is used for the production of a hot-pressure bonded body 1070 that is a part of the sodium-sulfur battery 1000. The apparatus 1300 for producing a hot-pressure bonded body may be used when a hot-pressure bonded body other than the hot-pressure bonded body 1070 is produced. The produced hot-pressure bonded body is not limited to the parts of the sodium-sulfur battery 1000.

  As shown in each of FIGS. 3 and 4, an apparatus 1300 for producing a hot-pressure bonded body includes a jig set 1340, a support tube 1341, pressing mechanisms 1342 and 1343, and an exhaust mechanism 1344 for producing a hot-pressure bonded body. In addition, a heating furnace 1345 is provided. The heating furnace 1345 includes a main body 1360 and heaters 1361 and 1362. A heating chamber 1380 is formed in the main body 1360.

4 Jig set for producing a hot-pressure bonded body The schematic diagram of FIG. 5 shows a cross section of a set of jig, a support tube, and a workpiece.

  As shown in FIG. 5, the work 1400 includes a solid electrolyte tube 1022, an insulating ring 1027, a bonding material 1028, a negative electrode metal fitting 1029, a bonding material 1030, a positive electrode metal fitting 1031, a bonding material 1032, and a backup ring that constitute a hot-pressure bonded body 1070. 1033 is temporarily assembled.

  The jig set 1340 includes jigs 1420, 1421, 1422, and 1423.

  When the hot-pressure bonded body 1070 is produced, the jig set 1340 and the support tube 1341 are attached to the workpiece 1400. In a state where the jig set 1340 and the support tube 1341 are attached to the work 1400, the jig 1421 is placed on the support pipe 1341, the work 1400 is placed on the jig 1421, and the work 1400 is placed on the work 1400. The jig 1422 is placed, the jig 1420 is placed on the jig 1422, and the work 1400 is covered with the jig 1420 and the support tube 1341. The work 1400 is covered with the jig 1420 and the support tube 1341, so that heat transfer is suppressed.

  The jig 1420 includes a plate-like structure 1440. When the jig 1420 is placed on the jig 1422, the plate-like structure 1440 is placed on the jig 1422. The plate-like structure 1440 receives a force that pushes the workpiece 1400 downward in the vertical direction 1460. The plate-like structure 1440 and the jig 1422 transmit to the workpiece 1400 a force that pushes the workpiece 1400 downward in the vertical direction 1460. The support tube 1341 receives a force that pushes the workpiece 1400 upward in the vertical direction 1461. The support tube 1341 and the jig 1421 transmit to the workpiece 1400 a force that pushes the workpiece 1400 upward in the vertical direction 1461. As a result, the workpiece 1400 is pushed from above to a vertically downward 1460 parallel to the axis 1480 of the workpiece 1400, and is pushed and pinched from below to a vertically upward 1461 parallel to the axis 1480 of the workpiece 1400. When the shaft 1480 of the workpiece 1400 is tilted from the direction parallel to the vertical direction, the direction in which the workpiece 1400 is pushed is also tilted from the vertical lower 1460 and the vertical upper 1461. More generally, the workpiece 1400 is pushed from one side in a first direction parallel to the axis 1480 of the workpiece 1400, and from the other side a second direction parallel to the axis 1480 of the workpiece 1400 and opposite to the first direction. Pushed in the direction. Structures other than the plate-like structure 1440 may receive a force that pushes the workpiece 1400 downward in the vertical direction 1460. A component other than the support tube 1341 may receive a force that pushes the workpiece 1400 upward in the vertical direction 1461.

  The jig 1420 includes a tubular structure 1441. A plate-like structure 1440 is coupled to the upper end of the tubular structure 1441. The outer peripheral surface 1500 of the work 1400 goes around the axis 1480 of the work 1400. In a state where the jig set 1340 and the support tube 1341 are attached to the workpiece 1400, the tubular structure 1441 and the support tube 1341 face the outer peripheral surface 1500 of the workpiece 1400. The tubular structure 1441 is opposed to the outer peripheral surface of the upper end portion including the hot pressure bonding of the workpiece 1400. The support tube 1341 faces the outer peripheral surface of the remaining portion that does not include the hot-pressure bonding of the workpiece 1400.

  A through-hole 1510 is formed in the plate-like structure 1440. The tubular structure 1441 is formed with through holes 1520, 1521, 1522 and 1523. The number of through holes formed may be increased or decreased. According to the jig 1420 in which the through holes 1510, 1520, 1521, 1522 and 1523 are formed, electromagnetic waves such as infrared rays propagate to the surface of the workpiece 1400 via the through holes 1510, 1520, 1521, 1522 and 1523. The workpiece 1400 can be heated by radiant heat transfer. In particular, according to the tubular structure 1441 in which the through holes 1520, 1521, 1522 and 1523 are formed, electromagnetic waves such as infrared rays occupy a wide range of the surface of the work 1400 via the through holes 1520, 1521, 1522 and 1523. Since it propagates to the outer peripheral surface 1500 of the work 1400, the work 1400 can be heated in a short time by radiant heat transfer. This contributes to shortening the time required to heat the workpiece 1400 and shortening the time required to produce the hot-pressure bonded body 1070.

  The shape of the outer peripheral surface 1540 of the tubular jig 1421 matches the shape of the inner peripheral surface 1560 of the tubular structure 1441. Therefore, the jig 1420 can be fitted to the jig 1421 by accommodating the jig 1421 in the cylindrical space 1580 formed in the tubular structure 1441. In a state where the jig set 1340 and the support tube 1341 are attached to the workpiece 1400, the jig 1420 is fitted to the jig 1421. When the jig 1420 is fitted to the jig 1421, the outer peripheral surface 1540 of the jig 1421 contacts the entire inner peripheral surface 1560 of the tubular structure 1441 in the circumferential direction, and the workpiece 1400, the jig 1420, and the jig 1421 are connected. It is coaxially arranged, and the direction in which the jig 1420 moves is restricted only to the direction parallel to the axis 1480 of the workpiece 1400. As a result, the direction in which the workpiece 1400 is pressed is not easily tilted from the direction parallel to the axis 1480 of the workpiece 1400, and the hot-pressure bonding is performed uniformly.

  Jig 1420 is preferably made of ceramics, more preferably silicon nitride ceramics. Accordingly, even when the pressing mechanism 1342 that presses the jig 1420 is made of a metal or an alloy, the jig 1420 is less likely to seize on the pressing mechanism 1342. The jig 1422 is sandwiched between the plate-like structure 1440 and the work 1400. The jig 1422 is preferably made of metal or alloy, and more preferably made of stainless steel. Thereby, the toughness of the jig 1422 is increased, and the jig 1422 is hardly broken. As described above, there is an advantage in that the jig 1422 is not integrated with the jig 1420 and the material of the jig 1422 is different from the material of the jig 1420, but the jig 1422 may be integrated with the jig 1420. forgiven.

  The jig 1421 is preferably made of ceramics. The jig 1423 is preferably made of SUS304.

  The negative electrode fitting 1029 includes a tubular structure 1081. The shape of the outer peripheral surface 1600 of the tubular jig 1423 matches the shape of the inner peripheral surface 1620 of the tubular structure 1081. Therefore, the jig 1423 can be attached to the negative electrode fitting 1029 by accommodating the jig 1423 in a cylindrical space formed in the tubular structure 1081. In a state where the jig set 1340 and the support tube 1341 are attached to the work 1400, the jig 1423 is attached to the negative electrode fitting 1029. When the jig 1423 is attached to the negative electrode fitting 1029, the outer peripheral surface 1600 of the jig 1423 is in contact with the entire inner peripheral surface 1620 of the tubular structure 1081 in the circumferential direction, and the negative electrode fitting 1029 is perpendicular to the shaft 1480 of the workpiece 1400. It is restricted from being deformed radially inward. A jig that restricts deformation toward the inside in the radial direction may be attached to a component of the workpiece 1400 other than the negative electrode fitting 1029. A jig that restricts deformation toward the outside in the radial direction may be attached to the component of the workpiece 1400.

5 Production of Hot-Pressure Bonded Body The flowchart of FIG.

  When the hot-pressure bonded body 1070 is produced, a heating furnace 1345 is prepared in Step 1800 and a work 1400 is prepared in Step 1801 as shown in FIG. In the prepared heating furnace 1345, the heating chamber 1380 is set to a high vacuum by the exhaust mechanism 1344, and the heating chamber 1380 is heated by the heaters 1361 and 1362.

  Subsequently, in step 1802, the jig set 1340 and the support tube 1341 are attached to the workpiece 1400.

  Subsequently, in Step 1803, the work 1400 to which the jig set 1340 and the support tube 1341 are attached is carried into the heating chamber 1380. Accordingly, each of the heaters 1361 and 1362 faces the outer peripheral surface 1500 of the work 1400 with the tubular structure 1441 interposed therebetween, and the work 1400 is heated by the heaters 1361 and 1362 from a direction perpendicular to the axis 1480 of the work 1400. At this time, since the heating chamber 1380 is in a high vacuum, air is hardly involved in a place where the hot-pressure bonding is performed, and the hot-pressure bonding is not easily inhibited by the air. Further, when the heating chamber 1380 is in a high vacuum, the workpiece 1400 is heated exclusively by radiant heat transfer. However, according to the tubular structure 1441 in which the through holes 1520, 1521, 1522 and 1523 are formed, infrared rays or the like Since the electromagnetic wave reaches the outer peripheral surface 1500 of the work 1400 via the through holes 1520, 1521, 1522 and 1523, the work 1400 is heated in a short time by radiant heat transfer.

  Subsequently, in step 1804, in a state where the workpiece 1400 is heated, the plate-like structure 1440 is pushed downward in the vertical direction 1460 by the pressing mechanism 1342, and the support tube 1341 is pushed upward in the vertical direction 1461 by the pressing mechanism 1343. The force generated by the pressing mechanism 1342 is transmitted to the upper surface 1161 of the backup ring 1033 by the plate-like structure 1440 and the jig 1422, and becomes a force for pressing the work 1400 downward in the vertical direction 1460. The force generated by the pressing mechanism 1343 is transmitted to the lower surface 1171 of the flange 1140 by the support tube 1341 and the jig 1421, and becomes a force that pushes the workpiece 1400 upward in the vertical direction 1461. Each of the pressing mechanisms 1342 and 1343 includes a lower surface 1100 of the flange 1080, an upper surface 1120 of the insulating ring 1027, an upper surface 1170 of the flange 1140, a lower surface 1121 of the insulating ring 1027, a lower surface 1160 of the backup ring 1033, and the flange 1080 shown in FIG. The work 1400 is pushed in a direction perpendicular to the upper surface 1101. Therefore, when each of the pressing mechanisms 1342 and 1343 presses the workpiece 1400, the bonding material 1028 is pressed between the flange 1080 and the insulating ring 1027, and the bonding material 1030 is pressed between the flange 1140 and the insulating ring 1027. 1032 is pressed between the backup ring 1033 and the flange 1080. As a result, the negative electrode fitting 1029 is hot-pressure bonded to the insulating ring 1027 via the bonding material 1028, the positive electrode fitting 1031 is hot-pressure bonded to the insulating ring 1027 via the bonding material 1030, and the backup ring 1033 is bonded via the bonding material 1032. Then, it is hot-pressure bonded to the negative electrode fitting 1029 to obtain a hot-pressure bonded body 1070.

  Subsequently, in step 1805, pressing by the pressing mechanisms 1342 and 1343 is completed, and the work 1400 to which the jig set 1340 and the support tube 1341 are attached is carried out of the heating chamber 1380.

  Subsequently, in step 1806, the jig set 1340 and the support tube 1341 are removed from the workpiece 1400.

  When the outer peripheral surface 1500 of the workpiece 1400 is heated by electromagnetic waves such as infrared rays that pass through the through holes 1520, 1521, 1522, and 1523, the temperature of the high-temperature portion 1640 that is relatively close to the outer peripheral surface 1500 of the workpiece 1400 is Although the tendency to become higher than the temperature of the low temperature portion 1641 relatively far from the outer peripheral surface 1500 becomes strong, the high temperature portion 1640 is more likely to thermally expand than the low temperature portion 1641, and there is a concern about damage to fragile portions such as the glass bonding interface 1660. As a result of the experiment, there was no damage that was a concern.

1000 Sodium-sulfur battery 1022 Solid electrolyte tube 1027 Insulating ring 1028 Bonding material 1029 Negative electrode fitting 1030 Bonding material 1031 Positive electrode fitting 1032 Bonding material 1033 Backup ring 1070 Hot-pressure bonded body 1300 Hot-pressure bonded body 1340 Jig set 1342 Pressing mechanism 1343 Pressing mechanism 1361 Heater 1362 Heater 1400 Workpiece 1420 Jig 1421 Jig 1422 Jig 1423 Jig

Claims (7)

A first structure for transmitting to the workpiece a force that pushes a workpiece having an outer circumferential surface around an axis in a direction parallel to the axis;
A second structure having an upper end to which the first structure is coupled and having a tubular shape and facing the outer peripheral surface and having a through hole facing the outer peripheral surface ;
A jig for producing a hot-pressure bonded body. A jig according to claim 1, wherein the direction is a first direction;
A second jig that transmits a force that pushes the workpiece in a second direction that is parallel to the axis and opposite to the first direction to the workpiece;
A set of jigs for producing a hot-pressure bonded body. The said 1st jig | tool is fitted by the said 2nd jig | tool, and the direction in which the said 1st jig | tool moves is controlled in the direction which makes a parallel with the said axis | shaft. A set of jigs. The first jig is made of ceramics;
The set of jigs for producing the hot-pressed assembly according to claim 2 or 3, further comprising a third jig made of a metal or an alloy sandwiched between the first structure and the work and transmitting the force to the work. The set of jigs for producing a hot-pressure bonded body according to any one of claims 2 to 4, further comprising a fourth jig for restricting deformation of the workpiece in a direction perpendicular to the axis. A jig according to claim 1;
A heater for heating the workpiece from a direction perpendicular to the axis;
A pressing mechanism that pushes the jig in the direction in a state in which the workpiece is heated;
For producing a hot-pressure bonded body comprising: Preparing the workpiece,
A step of obtaining a hot-pressure bonded body by forming a hot-pressure bonded to a workpiece prepared using the apparatus for producing the hot-pressure bonded body of claim 6;
A method for producing a hot-pressure bonded body comprising:

Images