JP6279256B2 - Heat conduction member manufacturing method, heat conduction member manufacturing apparatus, and heat conduction member manufacturing jig - Google Patents

Description

  The present invention relates to a method for manufacturing a heat conductive member, a heat conductive member manufacturing apparatus, and a jig for manufacturing a heat conductive member. More specifically, the present invention relates to a heat conductive member manufacturing method and a heat conductive member manufacturing apparatus capable of easily and inexpensively manufacturing a heat conductive member in which a cylindrical ceramic body is covered with a metal tube. Further, the present invention relates to a heat conductive member manufacturing jig and a heat conductive member manufacturing jig that can be suitably used in a heat conductive member manufacturing apparatus.

  By exchanging heat from a high temperature fluid to a low temperature fluid, heat can be effectively utilized. For example, there is a heat recovery technique for recovering heat from a high-temperature gas such as combustion exhaust gas from an engine. As the gas / liquid heat exchanger, a tube-type heat exchanger with fins such as an automobile radiator or an air conditioner outdoor unit is generally used.

  It may also be used for heating, cooling and condensation of corrosive fluids in the chemical and pharmaceutical industries. In this case, acids (bromic acid, sulfuric acid, hydrofluoric acid, nitric acid, hydrochloric acid, etc.), alkalis (caustic alkali, etc.) ), Halides, saline, and organic compounds may be subject to heat exchange. Specifically, the heat exchanger is used for, for example, a heat exchange part for hydrogen production (sulfuric acid evaporator), an automobile exhaust part, and the like, and may be used in a place where high temperature and corrosion resistance are required. When corrosion resistance is required, a ceramic heat exchanger may be used.

  The cylindrical ceramic body that serves as a heat exchanger has a structure that is stored in a metal container located on the outside, and even if the ceramic is damaged inside, the structure is such that fluids do not mix with each other. Yes (Patent Document 1). When the cylindrical ceramic body is coated with metal, high reliability and stable heat transfer characteristics are required. Further, when used as an automobile part or the like, low cost is also required.

International Publication No. 2012/067156

  As a typical method of covering a cylindrical ceramic body with metal, a shrink fitting method is known in which a metal tube is heated, and the cylindrical ceramic body is inserted and then cooled (baked). For shrink fitting, it is necessary that the inner diameter of the metal tube ≦ the outer diameter of the cylindrical ceramic body. Further, “Δ = outer diameter of cylindrical ceramic body−inner diameter of metal tube” may be referred to as shrink fit. This shrink fit is one of the factors that make the greatest contribution to the heat transfer characteristics and reliability of the heat conducting member, and is a parameter that must be taken most care during manufacture. In addition, the internal diameter of a metal tube becomes more than the outer diameter of a cylindrical ceramic body at the time of a heating.

  As such a shrink fit, there is an advantage that better and more stable heat transfer characteristics can be easily obtained if it can be secured as much as possible. However, the conventional method for producing a heat conducting member has the following problems. First, there is a problem of accuracy of the metal tube and the cylindrical ceramic body constituting the heat conducting member. That is, if the accuracy of the cylindrical and roundness of the metal tube and the cylindrical ceramic body is poor, it may be difficult to insert the cylindrical ceramic body into the metal tube. For example, when shrink fitting is performed at a certain temperature, if the cylindricality or roundness of the metal tube is not good, the range of shrink fit that can be shrink fit becomes narrow, and a large shrink fit is obtained. Becomes difficult. In addition, when a metal tube or a cylindrical ceramic body having excellent cylindricity or roundness is prepared in advance, additional processing of the metal tube is necessary or the outer peripheral surface of the cylindrical ceramic body is separately provided. Since grinding is necessary, the manufacturing cost is greatly increased.

  Further, the conventional method for producing a heat conducting member has a problem that it is difficult to align the metal tube and the cylindrical ceramic body when the cylindrical ceramic body is inserted into the heated metal tube. That is, when a cylindrical ceramic body is inserted into a heated metal tube, alignment with high accuracy is required, and the conventional manufacturing method requires complicated steps for alignment. In addition, if the above-described alignment is not properly performed, the cylindrical ceramic body may come into contact with the end surface of the metal tube when the cylindrical ceramic body is inserted. When the metal tube and the cylindrical ceramic body come into contact, the heat of the metal tube is taken away by the cylindrical ceramic body, and the thermally expanded metal tube contracts. The inner diameter of the metal tube needs to be thermally expanded to such a size that the cylindrical ceramic body can be inserted, but if the metal tube contracts due to the contact described above, the inner diameter of the metal tube becomes smaller than that of the cylindrical ceramic body. It may be smaller than the outer diameter. In such a state, it becomes impossible to insert the cylindrical ceramic body into the metal tube.

  The present invention has been made in view of the above-described problems, and a method for manufacturing a heat conductive member capable of easily and inexpensively manufacturing a heat conductive member in which a cylindrical ceramic body is covered with a metal tube, and A heat conductive member manufacturing apparatus is provided. Moreover, this invention provides the jig for heat conductive member manufacture which can be used suitably for the manufacturing method of the heat conductive member of this invention, and a heat conductive member manufacturing apparatus.

  According to this invention, the manufacturing method of a heat conductive member, the heat conductive member manufacturing apparatus, and the jig for heat conductive member manufacture shown below are provided.

[1] A shrink fitting process is provided in which a tubular ceramic body is inserted from one open end face of a tubular metal tube, and the metal tube and the tubular ceramic body inserted into the metal tube are shrink-fitted. By the first guide part for positioning the one opening end surface of the metal pipe that has spread in the radial direction due to thermal expansion, the second guide part for positioning the metal pipe and adjusting the posture of the cylindrical ceramic body The method of manufacturing a heat conducting member for adjusting the attitude of the cylindrical ceramic body and inserting the cylindrical ceramic body into the positioned metal tube, wherein the first guide portion is made of ceramics, The inner diameter is larger than the outer diameter of the metal tube before thermal expansion, and the first guide portion and the second guide portion are the cylindrical ceramic. It is a jig for manufacturing a heat conducting member that is arranged coaxially with respect to the axial direction when inserting the body, and in which the first guide portion and the second guide portion are integrated, In the guide portion, an end portion on the one opening end surface side of the metal tube in a state before heating is disposed , and the metal tube thermally expands on at least a part of the inner peripheral surface of the first guide portion. And the one opening end surface of the metal tube is constrained by the inner peripheral surface of the first guide portion due to thermal expansion of the end portion on the one opening end surface side of the metal tube. The manufacturing method of the heat conductive member positioned.

[ 2 ] The manufacturing of the heat conducting member according to [1 ] , wherein the first guide portion has a first tapered portion in which an inner diameter of the first guide portion decreases toward the second guide portion. Method.

[ 3 ] The second guide portion has a diameter of the cylindrical ceramic body with respect to the one opening end surface of the metal tube positioned by passing the cylindrical ceramic body through the second guide portion. The method for producing a heat conducting member according to [1] or [2] , wherein the guide is performed so that the position in the direction is an appropriate position.

[ 4 ] In any one of the above [1] to [ 3 ], the second guide portion has a second tapered portion in which an inner diameter of the second guide portion decreases toward the first guide portion. The manufacturing method of the heat conductive member of description.

[ 5 ] The minimum inner diameter of the second taper portion of the second guide portion coincides with the inner diameter of the metal tube positioned by the first guide portion by thermal expansion, or the second guide portion The method for manufacturing a heat conducting member according to [ 4 ], wherein the second taper portion is configured such that a minimum inner diameter is smaller than an inner diameter of the metal tube positioned by the first guide portion by thermal expansion. .

[ 6 ] The cylindrical ceramic body according to any one of [1] to [ 5 ], wherein the cylindrical ceramic body is dropped from above one opening end surface of the metal tube from above and inserted into the positioned metal tube. A method for manufacturing a heat conducting member.

[ 7 ] The method for producing a heat conducting member according to any one of [1] to [ 6 ], wherein the cylindrical ceramic body is a heat conducting member containing SiC as a main component.

[ 8 ] The method for manufacturing a heat conducting member according to any one of [1] to [ 7 ], wherein the cylindrical ceramic body has a honeycomb structure in which a plurality of cells are partitioned by partition walls.

[ 9 ] A first guide portion for positioning the metal tube by contacting the end portion on one open end face side of the cylindrical metal tube, and a second guide portion for adjusting the attitude of the cylindrical ceramic body. The first guide portion is for positioning the one open end surface of the metal tube that is radially expanded due to thermal expansion, and the one open end surface of the metal tube is positioned by the first guide portion. From the above, the cylindrical ceramic body whose posture is adjusted by the second guide part is inserted, and the metal pipe and the cylindrical ceramic body inserted into the metal pipe are heat-fitted into the heat conductive member. an apparatus, wherein the first guide portion, as well as a ceramics, than the outer diameter of the metal tube before thermal expansion, which is configured so that its inner diameter becomes larger, and the first The id part and the second guide part are arranged coaxially with respect to the axial direction when the cylindrical ceramic body is inserted, and the first guide part and the second guide part are integrated with each other. In the first guide portion, an end portion on the one opening end surface side of the metal tube in a state before heating is disposed in the first guide portion, and the inner peripheral surface of the first guide portion is arranged . At least a part of the metal tube comes into contact with the thermal expansion of the metal tube, and the expansion due to the thermal expansion of the end portion on the one opening end surface side of the metal tube is constrained by the inner peripheral surface of the first guide portion. By this, the one opening end surface of the said metal pipe is positioned, The heat conductive member manufacturing apparatus.

[ 10 ] The heat conducting member manufacturing apparatus according to [ 9 ], wherein the first guide portion includes a first tapered portion in which an inner diameter of the first guide portion decreases toward the second guide portion. .

[ 11 ] The second guide portion has a diameter of the cylindrical ceramic body with respect to the one opening end surface of the metal tube positioned by passing the cylindrical ceramic body through the second guide portion. The apparatus for manufacturing a heat conducting member according to [ 9] or [10] , which guides the position in the direction to be an appropriate position.

[ 12 ] The above-mentioned [ 9 ] to [ 11 ], wherein the second guide part has a second taper part in which an inner diameter of the second guide part decreases toward the first guide part. The heat conductive member manufacturing apparatus as described.

[ 13 ] The minimum inner diameter of the second taper portion of the second guide portion coincides with the inner diameter of the metal tube positioned by the first guide portion by thermal expansion, or the second guide portion. The heat conduction member manufacturing apparatus according to [ 12 ], wherein the second taper portion is configured such that a minimum inner diameter is smaller than an inner diameter of the metal tube positioned by the first guide portion by thermal expansion.

[ 14 ] It further includes a gripping part that grips the cylindrical ceramic body vertically above one opening end surface of the metal tube, and by releasing the gripping by the gripping part, The heat conductive member manufacturing apparatus according to any one of [ 9 ] to [ 13 ], configured to drop toward the metal pipe.

[ 15 ] A heat conductive member manufacturing jig used in the heat conductive member manufacturing apparatus according to any one of [ 9 ] to [ 14 ], wherein an end portion on one open end surface side of the cylindrical metal tube is provided. A first guide portion for positioning , and the second guide portion for adjusting the attitude of the cylindrical ceramic body , wherein the first guide portion and the second guide portion are arranged coaxially, The jig for manufacturing a heat conducting member, wherein the one guide portion positions the one open end surface of the metal pipe that has spread in the radial direction due to thermal expansion.

  According to the method for manufacturing a heat conductive member of the present invention, a heat conductive member in which a cylindrical ceramic body is covered with a metal tube can be manufactured easily and at low cost. That is, since the metal tube is positioned by the first guide portion that positions one open end surface of the metal tube that has spread in the radial direction due to thermal expansion, the cylindrical ceramic body can be easily inserted into the metal tube. For example, even when the cylindricity and roundness before thermal expansion of the metal tube are not good, the first guide portion improves the cylindricity and roundness of the metal tube with thermal expansion of the metal tube. The This facilitates the insertion of the cylindrical ceramic body into the metal tube without additional processing of the metal tube. Further, since the metal tube is positioned at the optimum position along with the thermal expansion of the metal tube, a complicated positioning operation such as image processing is not required. Furthermore, according to the manufacturing method of the heat conductive member of the present invention, a large shrink fit can be obtained, and a heat conductive member having better and stable heat transfer characteristics can be obtained. Furthermore, in the manufacturing method of the heat conductive member of the present invention, the cylindrical ceramic body is inserted into the positioned metal tube in a state where the posture of the cylindrical ceramic body is adjusted by the second guide portion. Therefore, it is possible to effectively prevent contact between the end surface of the metal tube and the cylindrical ceramic body, and effectively prevent heat removal from the metal tube by the cylindrical ceramic body, and thus thermal contraction of the thermally expanded metal tube. be able to.

  Moreover, the heat conductive member manufacturing apparatus of this invention and the jig for heat conductive member manufacture can be used suitably for the manufacturing method of the heat conductive member of this invention mentioned above. With this heat conductive member manufacturing apparatus and heat conductive member manufacturing jig, a heat conductive member in which a cylindrical ceramic body is covered with a metal tube can be manufactured easily and at low cost.

It is a perspective view which shows typically an example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention. It is the top view which looked at the heat conductive member shown in FIG. 1 from the one end surface of the axial direction. It is the top view seen from one end surface of the axial direction which shows the other example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention typically. It is sectional drawing cut | disconnected by the surface parallel to the axial direction which shows the other example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention typically. It is a schematic diagram which shows the manufacturing process of one Embodiment of the manufacturing method of the heat conductive member of this invention. It is a perspective view which shows typically an example of the jig for heat conductive member manufacture used for one Embodiment of the manufacturing method of the heat conductive member of this invention. It is a schematic diagram which shows the state before a metal tube is positioned in the process in which a metal tube is positioned with the jig for heat conductive member manufacture shown in FIG. It is sectional drawing which shows the A-A 'cross section in FIG. 7 typically. It is a schematic diagram which shows the state by which the metal tube was positioned in the process in which a metal tube is positioned with the jig for heat conductive member manufacture shown in FIG. FIG. 10 is a cross-sectional view schematically showing a B-B ′ cross section in FIG. 9. It is a perspective view which shows typically the other example of the jig for heat conductive member manufacture used for one Embodiment of the manufacturing method of the heat conductive member of this invention. It is a schematic diagram which shows the state before a metal pipe is positioned in the process of positioning a metal pipe with the jig for heat conductive member manufacture shown in FIG. It is a schematic diagram which shows the state by which the metal tube was positioned in the process in which a metal tube is positioned with the jig for heat conductive member manufacture shown in FIG. It is a schematic diagram which shows the state by which a cylindrical ceramic body is inserted in the positioned metal pipe in the process of positioning a metal pipe with the jig for heat conductive member manufacture shown in FIG. It is a schematic diagram which shows the manufacturing process of other embodiment of the manufacturing method of the heat conductive member of this invention. It is a schematic diagram which shows one Embodiment of the heat conductive member manufacturing apparatus of this invention. It is a perspective view showing typically a heat exchanger using a heat conduction member manufactured by one embodiment of a manufacturing method of a heat conduction member of the present invention.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The present invention is not limited to the following embodiments, and appropriate modifications and improvements are added to the following embodiments on the basis of ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It should be understood that what has been described also falls within the scope of the invention.

(1) Manufacturing method of heat conduction member:
One embodiment of the manufacturing method of the heat conductive member of the present invention is a manufacturing method for manufacturing the heat conductive member 10 as shown in FIGS. 1 and 2, for example. Here, FIG. 1 is a perspective view schematically showing an example of a heat conductive member manufactured by one embodiment of the method for manufacturing a heat conductive member of the present invention. FIG. 2 is a plan view of the heat conducting member shown in FIG. 1 as viewed from one end face in the axial direction. In the present specification, unless otherwise specified, the “axial direction” refers to a direction connecting one end surface and the other end surface of a cylindrical metal tube in a cylindrical metal tube, a cylindrical ceramic body. Means a direction connecting one end face and the other end face of the cylindrical ceramic body. The axial direction of the heat conducting member is a direction connecting one end surface and the other end surface of the cylindrical ceramic body arranged in the metal tube.

(1-1) Thermal conduction member:
Here, the heat conductive member manufactured by the manufacturing method of the heat conductive member of this embodiment is demonstrated. A heat conducting member 10 shown in FIGS. 1 and 2 includes a cylindrical ceramic body 11 and a metal tube 12 disposed on the outer peripheral side of the cylindrical ceramic body 11. The cylindrical ceramic body 11 has a flow path extending from one end surface 2 to the other end surface 2. This channel has a channel through which the first fluid flows. The first fluid is circulated through the cylindrical ceramic body 11 and the second fluid having a temperature lower or higher than that of the first fluid is circulated on the outer peripheral surface 12 h side of the metal tube 12. Heat exchange between the fluid and the second fluid can be performed. Since the metal pipe 12 is arranged on the outer peripheral side of the cylindrical ceramic body 11 in the heat conducting member 10, the first fluid and the second fluid are separated from each other in a liquid-tight and air-tight manner. Mixing of fluids is effectively prevented. Moreover, since the heat conducting member 10 includes the metal tube 12, it can be easily processed according to the installation location and the installation method, and has a high degree of freedom. The heat conducting member 10 can protect the cylindrical ceramic body 11 with the metal tube 12 and is resistant to external impact. Such a metal tube 12 and the cylindrical ceramic body 11 are integrated by shrink fitting.

  The cylindrical ceramic body 11 is formed of ceramics in a cylindrical shape and has a fluid flow path extending from one end face 2 in the axial direction to the other end face 2. The cylindrical shape is not limited to a cylindrical shape (columnar shape), but is a prismatic shape having an elliptical cross section perpendicular to the axial (longitudinal) direction, an oval shape in which arcs are combined, a square shape, or other polygonal shapes. Also good. The cylindrical ceramic body 11 is preferably a honeycomb structure 1 having partition walls 4 in which a large number of cells 3 serving as fluid flow paths are partitioned by the partition walls 4. By having the partition wall 4, heat from the fluid flowing through the inside of the cylindrical ceramic body 11 can be efficiently collected and transmitted to the outside. 1 and 2 show an embodiment in which a honeycomb structure 1 in which a large number of cells are formed is used as a cylindrical ceramic body 11. 1 and 2, reference numeral 7 indicates an outer peripheral wall of the cylindrical ceramic body 11, and reference numeral 7 h indicates an outer peripheral surface of the cylindrical ceramic body 11. Reference numeral 12 h denotes the outer peripheral surface of the metal tube 12. Further, the cylindrical ceramic body is a hollow ceramic tube constituted by only the outer peripheral wall 7 without the partition wall 4 (see FIG. 2) as the cylindrical ceramic body 11B, like the heat conducting member 10B shown in FIG. May be used. FIG. 3: is the top view seen from one end surface of the axial direction which shows the other example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention typically. In the heat conducting member shown in FIG. 3, the same components as those of the heat conducting member shown in FIG. 1 and FIG.

  Further, like the heat conducting member 10 </ b> C shown in FIG. 4, the metal tube 12 </ b> C may be longer than the axial length of the cylindrical ceramic body 11. FIG. 4 is a cross-sectional view taken along a plane parallel to the axial direction schematically showing still another example of the heat conductive member manufactured by one embodiment of the method of manufacturing the heat conductive member of the present invention. If comprised in this way, it will be easy to process the edge part 12a of 12 C of metal pipes according to the installation place and use of 10 C of heat conductive members. In the heat conduction member shown in FIG. 4, the same components as those of the heat conduction member shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

  A metal tube 12 shown in FIGS. 1 and 2 is integrated with the above-described cylindrical ceramic body 11 by shrink fitting. The metal tube 12 is preferably one having heat resistance and corrosion resistance. For example, a SUS tube, a copper tube, a brass tube, a titanium tube, a Ni alloy tube, an Al alloy tube, or the like can be used. The metal tube 12 is preferably such that the metal tube 12 does not fall out of the cylindrical ceramic body 11 due to the difference in coefficient of thermal expansion from the cylindrical ceramic body 11 during heat exchange.

(1-2) Manufacturing method of heat conduction member:
The manufacturing method of the heat conductive member of this embodiment is a manufacturing method provided with the shrink fitting process as shown in FIG. FIG. 5 is a schematic view showing a manufacturing process of an embodiment of the method for manufacturing a heat conducting member of the present invention. In the shrink fitting process, the cylindrical ceramic body 11 is inserted from one open end face of the cylindrical metal tube 12, and the metal tube 12 and the cylindrical ceramic body 11 inserted into the metal tube 12 are burned. It is a process to apply. In this shrink fitting process, first, the inner diameter of the metal tube 12 is temporarily expanded by heating the metal tube 12 ((a) to (c) in FIG. 5). Next, the cylindrical ceramic body 11 is inserted into the metal tube 12 with the inner diameter expanded ((d) in FIG. 5). Thereafter, the metal tube 12 is cooled and baked to obtain the heat conducting member 10 in which the metal tube 12 and the cylindrical ceramic body 11 are integrated ((e) in FIG. 5). In FIG. 5, the end surface of the metal tube 12 opposite to the end surface on the insertion side is supported by the receiving jig 40. The receiving jig 40 is configured to be movable up and down toward the first guide portion 32, and can move the metal tube 12 into the first guide portion 32. In the manufacturing method of the heat conducting member of the present embodiment, the metal tube 12 comes into contact with at least a part of the inner peripheral surface of the first guide portion 32 by thermal expansion, and one open end surface of the metal tube 12 is in contact. Positioned. When moving the metal tube 12 into the first guide portion 32, it is preferable to move the metal tube 12 and the first guide portion 32 so that they do not come into contact with each other in the state before heating. That is, in the state before heating, the metal tube 12 and the first guide portion 32 do not come into contact with each other, and the metal tube 12 and the first guide portion 32 come into contact with each other due to thermal expansion during heating. Is preferred. Further, in FIG. 5, a furnace body wall 42 is disposed around the metal tube 12.

  In the manufacturing method of the heat conducting member of the present embodiment, first, the metal tube 12 is positioned by the first guide portion 32 that positions one open end surface of the metal tube 12 that has spread in the radial direction due to thermal expansion. Further, while positioning the metal tube 12 by the first guide part 32 in this way, the attitude of the cylindrical ceramic body 11 is adjusted by the second guide part 33 for the cylindrical ceramic body 11. To adjust the posture of the cylindrical ceramic body 11, the cylindrical ceramic body 11 is positioned so that the end surface of the cylindrical ceramic body 11 to be inserted into the metal tube 12 is located within one open end surface of the metal tube 12. 11 means to correct the position. Then, the cylindrical ceramic body 11 whose posture is adjusted is inserted into the positioned metal tube 12. In a state where the cylindrical ceramic body 11 is inserted into the metal tube 12, the metal tube 12 is cooled, and the metal tube 12 and the cylindrical ceramic body 11 are shrink-fitted. By comprising in this way, the heat conductive member 10 with which the metal pipe 12 and the cylindrical ceramic body 11 were integrated by shrink fitting can be obtained.

  According to the manufacturing method of the heat conductive member of this embodiment, the heat conductive member 10 which coat | covered the cylindrical ceramic body 11 with the metal pipe 12 can be manufactured simply and at low cost. That is, since the metal tube 12 is positioned by the first guide portion 32 that positions one open end face of the metal tube 12, the cylindrical ceramic body 11 can be easily inserted into the metal tube 12. For example, even if the cylindricity and the roundness before the thermal expansion of the metal tube 12 are not good, the cylindricity and the roundness of the metal tube 12 are increased according to the thermal expansion of the metal tube 12. 32. Thereby, the cylindrical ceramic body 11 can be easily inserted into the metal tube 12 without additional processing of the metal tube 12 or the like. In particular, when the heat conducting member 10 is manufactured, the thin metal tube 12 may be suitably used in order not to deteriorate the heat conducting characteristics. Since such a thin metal tube 12 is difficult to achieve roundness, it has been very difficult to smoothly insert the cylindrical ceramic body without any trouble in the conventional manufacturing method. According to the manufacturing method of the heat conductive member of this embodiment, even if it is the thin metal pipe 12, since the cylindricity and the roundness are improved by the first guide portion 32, the insertion into the metal pipe is not hindered. It will be done smoothly. Further, if the metal tube 12 is thin, it is easy to improve the cylindricity and the roundness of the metal tube 12 in the method for manufacturing the heat conducting member of the present embodiment. Moreover, in the manufacturing method of the heat conductive member of this embodiment, since a metal tube is positioned in an optimal position with the thermal expansion of a metal tube, complicated positioning operation, such as image processing, is not required.

  Moreover, according to the manufacturing method of the heat conductive member of this embodiment, a large shrink fit can be obtained, and the heat conductive member 10 having better and stable heat transfer characteristics can be obtained. Furthermore, in the manufacturing method of the heat conducting member of the present embodiment, the cylindrical ceramic body 11 is inserted into the positioned metal tube 12 in a state where the posture of the cylindrical ceramic body 11 is adjusted by the second guide portion 33. To do. Therefore, contact between the end face of the metal tube 12 and the cylindrical ceramic body 11 can be effectively prevented, and heat removal from the metal tube 12 by the cylindrical ceramic body 11, and thus heat of the thermally expanded metal tube 12. Shrinkage can be effectively prevented.

  In the manufacturing method of the heat conductive member of this embodiment shown in FIG. 5, the shrink fitting process is performed using the heat conductive member manufacturing jig 31 shown in FIG. FIG. 6 is a perspective view schematically showing an example of a heat conductive member manufacturing jig used in one embodiment of the method of manufacturing a heat conductive member of the present invention. The heat conduction member manufacturing jig 31 shown in FIG. 6 is a hollow cylindrical structure jig, has a first guide portion 32 on the bottom surface 31y side of the heat conduction member manufacturing jig 31, and includes a heat conduction member manufacturing jig 31. A second guide portion 33 is provided on the upper surface 31x side.

  As shown in FIGS. 7 to 10, the first guide portion 32 is for positioning one open end face of the metal tube 12 that has spread in the radial direction due to thermal expansion. Specifically, as shown in FIGS. 7 and 8, the first guide portion 32 is configured such that its inner diameter is larger than the outer diameter of the metal tube 12 before thermal expansion. That is, on the bottom surface 31y side of the heat conducting member manufacturing jig 31, the portion where the end portion on the one end face side of the metal tube 12 is inserted in the axial direction is the first guide portion. 32. When positioning the metal tube 12, first, the metal tube 12 before thermal expansion is inserted into the first guide portion 32 from below the bottom surface 31 y of the heat conduction member manufacturing jig 31. At this time, the metal pipe 12 is disposed in the first guide portion 32 without the inner peripheral surface of the first guide portion 32 and the outer peripheral surface of the metal tube 12 contacting each other. Note that a part of the outer peripheral surface of the metal tube 12 may be in contact with the inner peripheral surface of the first guide portion 32 as long as the insertion of the metal tube 12 into the first guide portion 32 is not hindered. In the present specification, “the outer diameter d of the metal tube” is an average value of the outer diameters of the measured points by measuring 8 or more points on the end surface of the metal tube on the side where the cylindrical ceramic body is inserted. .

  Thereafter, when the metal tube 12 disposed in the first guide portion 32 is heated, the metal tube 12 is thermally expanded as shown in FIGS. The expansion due to the thermal expansion of the end portion on the one end face side of the metal tube 12 is constrained by the inner peripheral surface of the first guide portion 32. The shape of the inner peripheral surface of the first guide portion 32 is set to a shape that matches the shape of the outer peripheral surface of the cylindrical ceramic body 11 inserted into the metal tube 12, and the metal tube 12 is caused by its own thermal expansion. Positioned by the first guide portion 32. Here, FIG. 7 is a schematic diagram showing a state before the metal tube is positioned in the step of positioning the metal tube by the heat conducting member manufacturing jig shown in FIG. FIG. 8 is a cross-sectional view schematically showing the A-A ′ cross section in FIG. 7. FIG. 9 is a schematic diagram showing a state in which the metal tube is positioned in the process of positioning the metal tube by the heat conducting member manufacturing jig shown in FIG. 6. FIG. 10 is a cross-sectional view schematically showing a B-B ′ cross section in FIG. 9.

  According to such a manufacturing method, thermal expansion is performed so that the metal tube 12 conforms to the shape of the inner peripheral surface of the first guide portion 32 even when the accuracy of the cylindricity and roundness of the metal tube is poor. Therefore, the accuracy of the cylindricity and roundness of the metal tube can be improved. Further, as described above, since the metal tube 12 is positioned by the first guide portion 32 due to the thermal expansion of the metal tube 12 itself, the one open end surface of the metal tube 12 is positioned by an extremely simple method. be able to.

  Although there is no restriction | limiting in particular about the method of heating the metal tube 12, For example, the method of heating using an induction heater can be mentioned. Examples of the induction heater include a high frequency heater. About heating temperature, it is preferable to heat up to about 500-1200 degreeC, for example.

In the method of manufacturing the heat transfer member of the present embodiment, at least a portion of the inner peripheral surface of the first guide portion, the metal pipe is in contact by thermal expansion, one opening end face of the metal tube Ru is positioned . By comprising in this way, one opening end surface of a metal tube can be positioned by a very simple method. In other words, the metal tube itself is positioned at a predetermined position by the thermal expansion of the metal tube.

  As shown in FIG. 11, the first guide portion 32B may have a first taper portion 34 in which the inner diameter of the first guide portion decreases toward the second guide portion 33B. Here, FIG. 11 is a perspective view schematically showing another example of a jig for manufacturing a heat conductive member used in one embodiment of the method for manufacturing a heat conductive member of the present invention. A heat conduction member manufacturing jig 31B shown in FIG. 11 is a hollow cylindrical structure jig, has a first guide portion 32B on the bottom surface 31y side of the heat conduction member manufacturing jig 31B, and includes a heat conduction member manufacturing jig 31B. The second guide portion 33B is provided on the upper surface 31x side. As shown in FIGS. 12 to 14, the first guide portion 32 </ b> B positions one open end surface of the metal tube 12 that has spread in the radial direction due to thermal expansion. Since the first guide portion 32B has the first tapered portion 34 in which the inner diameter of the first guide portion is reduced, the inner peripheral surface of the first guide portion 32B and the outer peripheral surface of the metal tube 12 are in contact with each other. In addition, both of the first tapered portions 34 come into contact with each other. Therefore, the contact area between the first guide portion 32B and the metal tube 12 can be reduced, and the heat removal from the metal tube 12 to the first guide portion 32B can be reduced. For this reason, at the time of contact with the first guide portion 32B (in other words, at the time of positioning of the metal tube 12), the metal tube 12 is unlikely to thermally contract, and the metal tube 12 is connected to the inner periphery of the first guide portion 32B. It becomes possible to perform thermal expansion well so as to conform to the shape of the surface. Further, the first tapered portion 34 can cope with a change in thermal expansion in the axial direction of the metal tube 12. That is, when the metal tube 12 is thermally expanded in the axial direction, one opening end surface of the metal tube 12 comes into contact with the first tapered portion 34, and the positioning of the metal tube 12 and the roundness of the metal tube 12 are determined. Improvements are made. Although not shown, the first taper portion 34 in FIG. 11 may further include a first guide straight portion at the tip of the second guide portion 33B side where the inner diameter of the first guide portion 32B is constant. Good.

  As the second guide portion in the method for manufacturing a heat conducting member of the present embodiment, the cylindrical ceramic body is preferably adjusted by passing the cylindrical ceramic body through the second guide portion. By using the second guide portion configured in this way, for example, when the metal tube is positioned so that one opening end surface thereof is vertically upward, the cylindrical ceramic body is dropped from above the metal tube. By doing so, the cylindrical ceramic body can be inserted into the metal tube very easily. That is, the cylindrical ceramic body is aligned by passing through the second guide portion in the process of dropping due to its own weight. For this reason, when the cylindrical ceramic body is inserted into the metal tube, it is not always necessary to hold (chuck) the cylindrical ceramic body, and the insertion operation of the cylindrical ceramic body becomes extremely simple.

  Further, when dropping the cylindrical ceramic body into the metal tube, a weight may be disposed on the end surface facing vertically upward of the cylindrical ceramic body, and the cylindrical ceramic body may be dropped together with this weight. By comprising in this way, since the cylindrical ceramic body falls in the state where the gravity of the weight is added, the insertion into the metal tube is smoothly performed without any trouble.

  In the manufacturing method of the heat conducting member of the present embodiment, for example, the cylindrical ceramic body is held by a fixing means or the like without using the method of dropping the cylindrical ceramic body by its own weight and inserting it into the metal tube. You may insert in a metal pipe in the state which carried out. That is, as shown in FIG. 15, the cylindrical ceramic 61 may be fixed by a fixing jig 51 disposed at the tip of the shaft 50, and the cylindrical ceramic 61 may be inserted into the metal tube 62. FIG. 15 is a schematic diagram showing a manufacturing process (shrink fitting process) of another embodiment of the method for manufacturing a heat conducting member of the present invention. Here, in FIG. 15, the same components as those shown in FIG.

  In the shrink fitting process shown in FIG. 15, first, the honeycomb structure 1 (tubular ceramic 61) is fixed by a fixing jig 51 disposed at the tip of the shaft 50 ((a) in FIG. 15). There is no restriction | limiting in particular about the fixing method by the fixing jig 51. FIG. In this shrink fitting process, the metal tube 62 is heated to temporarily widen the inner diameter of the metal tube 62 ((a) to (c) in FIG. 15). Next, the cylindrical ceramic body 61 is inserted into the metal tube 62 with the inner diameter expanded ((b) and (c) in FIG. 15). The shaft 50 shown in FIG. 15 is configured to be movable up and down, and the cylindrical ceramics 61 fixed by the fixing jig 51 can be inserted into the metal tube 62 without depending on gravity. The vertical movement of the shaft 50 is preferably performed relatively slowly. After the cylindrical ceramic 61 is inserted into the metal tube 62, the fixed state between the fixing jig 51 and the cylindrical ceramic 61 is released. Thereafter, the fixing jig 51 is preferably detached from the metal tube 62 by raising the shaft 50. In the shrink fitting process shown in FIG. 15, an example is shown in which the cylindrical ceramic 61 is inserted vertically downward by moving the shaft 50 up and down. Inserting the cylindrical ceramic 61 is one of the preferable modes. Further, the shaft 50 may be moved in directions other than up and down. For example, although not shown in the figure, the cylindrical ceramics 61 may be inserted into the metal tube 62 that opens horizontally by moving the shaft 50 in the horizontal direction.

  Here, when the ratio (L / D) between the axial length L of the cylindrical ceramic 61 and the diameter D of the end face is as small as 1 or less, the following two problems may occur. The first problem is that the cylindrical ceramic 61 does not enter the end face of the metal tube 62. The second problem is that even if the end surface of the cylindrical ceramic 61 passes, the cylindrical ceramic 61 tilts in the middle of insertion, and a defect occurs in which the cylindrical ceramic 61 stops without falling to a desired position. is there. In the shrink fitting process shown in FIG. 15, the cylindrical ceramics 61 are fixed by the fixing jig 51 disposed at the tip of the shaft 50, and the horizontal level of the cylindrical ceramics 61 is kept (while the inclination is suppressed), It can be inserted into the metal tube 62. Therefore, the two problems described above can be solved.

A first guide portion and the second guide portion, in the axial direction when inserting the cylindrical ceramic body, that are arranged coaxially. A first guide portion and the second guide portion Ru der those integral. For example, in the manufacturing method of the heat conductive member shown in FIG. 5, the example at the time of using the jig 31 for heat conductive member manufacture with which the 1st guide part 32 and the 2nd guide part 33 were united is shown. As shown in FIG. 6, the second guide portion 33 is provided on the upper surface 31 x side of the heat conduction member manufacturing jig 31. The second guide portion 33 of the heat conducting member manufacturing jig 31 shown in FIG. 6 has a second tapered portion 35 in which the inner diameter of the second guide portion 33 decreases toward the first guide portion 32.

  As shown in FIG. 5, the second guide portion 33 is configured such that the cylindrical ceramic body 11 passes through the second guide portion 33 and the cylindrical ceramic body 11 is in contact with the one open end surface of the metal tube 12. The guide is such that the radial position is an appropriate position. For example, by dropping the cylindrical ceramic body 11 from above the metal tube 12, the cylindrical ceramic body 11 that has passed through the second guide portion 33 is positioned, and it is very simply placed in the positioned metal tube 12. A cylindrical ceramic body 11 can be inserted.

  In the manufacturing method of the heat conducting member of the present embodiment, as shown in FIG. 9, the minimum inner diameter of the second tapered portion 35 of the second guide portion 33 is thermally expanded and positioned by the first guide portion 32. It preferably matches the inner diameter of the tube 12. It is also preferable that the second taper portion 35 of the second guide portion 33 is configured such that the minimum inner diameter is smaller than the inner diameter of the metal tube 12 positioned by the first guide portion 32 by thermal expansion. This is one aspect. By configuring as described above, it is possible to ensure as much as possible as the shrink fit, and the heat transfer characteristics of the obtained heat conducting member can be made better and more stable. As shown in FIGS. 11 to 14, the second guide portion 33 </ b> B has a second tapered portion that reduces the inner diameter of the second guide portion 33 </ b> B, and the second guide portion 33 </ b> B has a constant inner diameter. You may further have a guide straight part. By further including such a second guide straight portion, the right angle with respect to one end face of the metal tube 12 is further improved after the attitude of the cylindrical ceramic body 11 is adjusted.

There is no restriction | limiting in particular about the material of a 1st guide part and a 2nd guide part. However, since the first guide portion is in direct contact with the heated metal tube, the first guide portion preferably has low thermal expansion, low thermal conductivity, and heat resistance. Even when the first guide portion and the second guide portion are integrated jigs, the jigs preferably have low thermal expansion, low thermal conductivity, heat resistance, and wear resistance. As such, mention may be made of ceramics. In the case where the jig described above is a ceramic, examples thereof include ceramics such as oxides, carbides, nitrides, graphite carbon, and metal matrix composite materials (in other words, cermets) containing those ceramics. Moreover, as a reference example, when the jig mentioned above is a metal, the single metal containing Ti, W, Mo, and Fe, and an alloy can be mentioned. Examples of the alloy include Fe—Ni alloy, Fe—Ni—Co alloy, and low expansion cast iron. It is preferable that elements such as W, Nb, Al, C, Si, Mg, Cr, Co, Mn, Ti, and Mo are further added to these metals. It is also one of preferred embodiments that a ceramic coating is applied to a part of the jig, or that a part of the ceramic jig is made of metal and has a hybrid structure heated by induction heating. If the temperature of the jig is high, the temperature of the metal tube is unlikely to decrease when the heated metal tube and the jig are brought into contact with each other. Specifically, it is possible to make a simple manufacturing method by reducing extra conditions.

  Moreover, in the 1st guide part, you may comprise so that the heat capacity and heat conduction of the location which contacts a metal pipe may be suppressed partially. For example, the thickness of the first guide portion at a location in contact with the metal tube may be reduced, or a groove or the like may be formed in the portion. Moreover, it is good also considering the material of the location which contacts a metal pipe as a thing of low heat conductivity.

(1-3) Cylindrical ceramic body:
The cylindrical ceramic body 11 preferably has a thermal conductivity of 100 W / m · K or more. More preferably, it is 120-300 W / m * K, More preferably, it is 150-300 W / m * K. By setting it as this range, heat conductivity becomes favorable and the heat | fever in the cylindrical ceramic body 11 can be efficiently discharged | emitted to the outer side of the metal tube 12. FIG.

  The cylindrical ceramic body 11 is preferably made of ceramics having excellent heat resistance, and considering heat conductivity in particular, it is preferable that SiC (silicon carbide) having high thermal conductivity is the main component. The main component means that 50% by mass or more of the cylindrical ceramic body 11 is silicon carbide.

  However, the entire cylindrical ceramic body 11 does not necessarily need to be composed of SiC (silicon carbide), and SiC (silicon carbide) may be included in the main body. That is, the cylindrical ceramic body 11 is preferably made of a ceramic containing SiC (silicon carbide). As described above, the cylindrical ceramic body 11 is a heat conductive member mainly composed of SiC, which is one preferred form.

  In addition, even if it is SiC (silicon carbide), since a high thermal conductivity is not obtained in the case of a porous body, it is preferable to make it a dense body structure in the manufacturing process of the cylindrical ceramic body 11. High heat conductivity can be obtained by using a dense structure. For example, in the case of a porous body of SiC (silicon carbide), it is about 20 W / m · K, but by making it a dense body, it can be about 150 W / m · K.

As the cylindrical ceramic body 11, Si-impregnated SiC, (Si + Al) -impregnated SiC, metal composite SiC, recrystallized SiC, Si ₃ N ₄ , reactive sintered SiC, and the like can be adopted, but a high heat exchange rate is obtained. Therefore, Si-impregnated SiC and (Si + Al) -impregnated SiC can be used to obtain a dense structure. Si-impregnated SiC has a structure in which the SiC particle surface is surrounded by solidified metal-silicon melt and SiC is integrally bonded via metal silicon, so that silicon carbide is shielded from an oxygen-containing atmosphere and prevented from oxidation. Is done. Furthermore, SiC has the characteristics of high thermal conductivity and easy heat dissipation, but SiC impregnated with Si is densely formed while exhibiting high thermal conductivity and heat resistance, and has sufficient strength as a heat transfer member. Indicates. That is, the cylindrical ceramic body 11 made of a Si—SiC-based (Si-impregnated SiC, (Si + Al) -impregnated SiC) material has excellent heat resistance, thermal shock resistance, oxidation resistance, and corrosion resistance against acids and alkalis. In addition to showing properties, it exhibits high thermal conductivity.

  When the cylindrical ceramic body 11 is formed as the honeycomb structure 1 in which a plurality of cells 3 serving as flow paths are partitioned by the partition walls 4, the cell shape may be a circle, an ellipse, a triangle, a quadrangle, a hexagon, A desired shape may be appropriately selected from polygons and the like. It is one of the preferable embodiments that the cylindrical ceramic body 11 has a honeycomb structure in which a plurality of cells 3 are defined by partition walls 4.

The cell density of the honeycomb structure 1 (that is, the number of cells per unit cross-sectional area) is not particularly limited and may be appropriately designed depending on the purpose, but may be in the range of 4 to 320 cells / cm ^2. preferable. When the cell density is larger than 4 cells / cm ² , the strength of the partition walls 4, and consequently the strength of the honeycomb structure 1 itself and the effective GSA (geometric surface area) can be made sufficient. On the other hand, when the cell density is 320 cells / cm ² or less, the pressure loss when the heat medium flows can be reduced.

  Further, the number of cells per honeycomb structure 1 is preferably 1 to 10,000, and more preferably 200 to 2,000. If the number of cells is too large, the honeycomb itself becomes large, so the heat conduction distance from the first fluid side to the second fluid side becomes long, the heat conduction loss becomes large, and the heat flux becomes small. In addition, when the number of cells is small, the heat transfer area on the first fluid side becomes small, the heat resistance on the first fluid side cannot be lowered, and the heat flux becomes small.

  The thickness (wall thickness) of the partition walls 4 of the cells 3 of the honeycomb structure 1 may be appropriately designed according to the purpose, and is not particularly limited. The wall thickness is preferably 50 μm or more and 2 mm or less, and more preferably 60 μm or more and 600 μm or less. When the wall thickness is 50 μm or more, the mechanical strength is improved and damage due to impact or thermal stress can be prevented. On the other hand, when the thickness is 2 mm or less, the ratio of the cell volume to the honeycomb structure side is increased, so that the pressure loss of the fluid is reduced and the heat exchange rate can be improved.

The density of the partition walls 4 of the cells 3 of the honeycomb structure 1 is preferably 0.5 to ⁵ g / cm ³ . In the case of 0.5 g / cm ³ or more, the strength of the partition wall 4 is sufficient, and the partition wall 4 can be prevented from being damaged by pressure when the first fluid passes through the flow path. Further, if it is 5 g / cm ³ or less, the honeycomb structure 1 itself does not become too heavy, and the weight can be reduced. By setting the density within the above range, the honeycomb structure 1 can be strengthened. Moreover, the effect which improves heat conductivity is also acquired.

  Here, a method for producing the cylindrical ceramic body 11 will be described by taking a method for producing the honeycomb structure 1 as an example. First, SiC powders having different average particle diameters are mixed to prepare a mixture of SiC powders. This SiC powder mixture is mixed with a binder and water, and kneaded using a kneader to obtain a kneaded product. This kneaded product is put into a vacuum kneader to produce a cylindrical clay.

  Next, the kneaded material is extruded to form a honeycomb formed body. In extrusion molding, the shape and thickness of the outer peripheral wall, the thickness of the partition walls, the shape of the cells, the cell density, and the like can be made desired by selecting an appropriate form of die and jig. The base is not particularly limited, but it is preferable to use a base made of a cemented carbide that does not easily wear. The honeycomb molded body is formed so that the outer peripheral wall has a cylindrical shape or a quadrangular prism shape, and the inside of the outer peripheral wall is divided into a quadrangular lattice shape by partition walls. Further, these partition walls are formed so as to be parallel to each other at equal intervals in each of the directions orthogonal to each other and straight across the inside of the outer peripheral wall. Thereby, the cross-sectional shape of the cell other than the outermost peripheral portion inside the outer peripheral wall can be made square.

  Next, the honeycomb formed body obtained by extrusion molding is dried. Although not particularly limited, the honeycomb formed body is dried by an electromagnetic wave heating method, an external heating method, a hot air blowing method, or the like, and moisture corresponding to 97% or more of the total water content contained in the honeycomb formed body before drying is added to the honeycomb. Remove from the compact.

  The dried honeycomb formed body is appropriately degreased after appropriately processing the outer shape (outer diameter, L dimension) as necessary. Furthermore, a lump of metal Si is placed on the honeycomb structure obtained by such degreasing and fired in a vacuum or in an inert gas under reduced pressure. During this firing, the mass of metal Si placed on the honeycomb structure is melted, and the outer peripheral wall 7 and the partition walls 4 are impregnated with metal Si. For example, when the thermal conductivity of the outer peripheral wall 7 and the partition wall 4 is set to 100 W / m · K, a mass of 70 parts by mass of metal Si is used with respect to 100 parts by mass of the honeycomb structure. Further, when the thermal conductivity of the outer peripheral wall 7 and the partition walls 4 is set to 150 W / m · K, 80 parts by mass of metal Si is used with respect to 100 parts by mass of the honeycomb structure. As described above, the honeycomb structure 1 (tubular ceramic body 11) used in the manufacturing method of the heat conducting member of the present embodiment can be manufactured.

(1-4) Metal pipe:
The metal tube 12 is preferably one having heat resistance and corrosion resistance. For example, a SUS tube, a copper tube, a brass tube, a titanium tube, a Ni alloy tube, an aluminum alloy tube, or the like can be used. The inner diameter of the metal tube 12 should be within a range where the pressure of the interference fit is surely applied in a temperature range from room temperature to 150 ° C. assumed at the joint between the cylindrical ceramic body 11 and the metal tube 12. preferable.

  The shape of the metal tube 12 may be such that the end of the metal tube 12 contacts the heat conducting member manufacturing jig 31 during thermal expansion. Therefore, the metal pipe 12 may be a straight pipe, but may be a pipe other than the straight pipe and configured so that the diameter changes in the axial direction. For example, a metal tube whose end is expanded or a metal tube whose diameter is expanded by flaring (in other words, the end is expanded in a conical shape) are also preferable forms.

(1-5) Intermediate material:
In the manufacturing method of the heat conductive member of this embodiment, you may perform a shrink fitting process in the state which pinched | interposed the intermediate material between the metal tube and the cylindrical ceramic body. Examples of the intermediate material include a graphite sheet, a metal sheet, a gel sheet, and an elastoplastic fluid. Examples of the metal constituting the metal sheet include gold (Au), silver (Ag), copper (Cu), and aluminum (Al). An elasto-plastic fluid is a material that, if it is a small force, behaves as a solid without plastic deformation (has an elastic modulus), and deforms freely like a fluid when a large force is applied. Etc. are mentioned as examples. As an intermediate material, it is preferable to use a graphite sheet in consideration of adhesion and thermal conductivity. Hereinafter, a graphite sheet will be described as an example of the intermediate material.

  An intermediate material made of graphite sheet is sandwiched between the tubular ceramic body and the metal tube by performing the shrink fitting process by sandwiching the intermediate material made of graphite sheet between the metal tube and the tubular ceramic body. A heat conductive member can be obtained. In such a heat conducting member, pressure is applied to the graphite sheet and heat can be transferred in an environment of room temperature to 150 ° C. when the joint between the metal tube and the cylindrical ceramic body is used.

  The graphite sheet in the present specification is a sheet obtained by rolling a graphite mainly composed of expanded graphite into a sheet, or a sheet obtained by pyrolyzing a polymer film. Including what is called. The graphite sheet preferably has a Young's modulus in the thickness direction of 1 GPa or less and a thermal conductivity in the thickness direction of 1 W / m · K or more. The thermal conductivity in the thickness direction is more preferably 3 to 10 W / m · K. In addition, the thermal conductivity in the in-plane direction is preferably 5 to 1600 W / m · K, and more preferably 100 to 400 W / m · K.

  The Young's modulus of the graphite sheet is preferably 1 MPa or more and 1 GPa or less. More preferably, it is 5 MPa or more and 500 MPa or less, More preferably, it is 10 MPa or more and 200 MPa or less. If the Young's modulus is 1 MPa or more, the density of graphite is sufficient and the thermal conductivity is good. On the other hand, when the pressure is 500 MPa or less, even a thin graphite sheet is sufficiently elastically deformed at the time of shrink fitting, and adhesion and stress relaxation effect of the metal tube 12 can be obtained.

  The thickness of the graphite sheet is preferably 25 μm or more and 1 mm or less, more preferably 25 μm or more and 500 μm or less, and further preferably 50 μm or more and 250 μm or less. Graphite sheets become more expensive as they become thinner. Moreover, when it becomes thick, heat resistance will be produced. By using the graphite sheet in this range, the thermal conductivity is improved, and the heat in the cylindrical ceramic body can be efficiently discharged to the outside of the metal tube.

  When such a graphite sheet is used as an intermediate material, it is preferable to wrap the graphite sheet around the outer peripheral surface of the outer peripheral wall of the cylindrical ceramic body before being inserted into the metal tube. At this time, you may affix a graphite sheet to the outer peripheral surface of the outer peripheral wall of a cylindrical ceramic body using an adhesive agent. By using an adhesive, a graphite sheet can be uniformly attached. It is desirable that the adhesive is sufficiently thin and has good heat conductivity.

(2) Heat conduction member manufacturing apparatus:
Next, an embodiment of the heat conductive member manufacturing apparatus of the present invention will be described. The heat conductive member manufacturing apparatus of this embodiment is a heat conductive member manufacturing apparatus used for the manufacturing method of the heat conductive member of this embodiment demonstrated so far. FIG. 16 is a schematic view showing an embodiment of the heat conducting member manufacturing apparatus of the present invention.

  As shown in FIG. 16, the heat conducting member manufacturing apparatus 100 of the present embodiment includes a first guide portion 32 that positions the cylindrical metal tube 12, and a second guide portion 33 that adjusts the posture of the cylindrical ceramic body 11. It is equipped with. The 1st guide part 32 positions one opening end surface of the metal pipe 12 expanded to radial direction by thermal expansion. That is, the 1st guide part 32 suppresses the thermal expansion beyond it by contacting with the metal pipe 12 expanded to radial direction by thermal expansion, and positions the metal pipe 12.

  In the heat conducting member manufacturing apparatus 100 of the present embodiment, the cylindrical ceramic body 11 whose posture is adjusted by the second guide portion 33 is inserted from one open end surface of the metal tube 12 positioned by the first guide portion 32. It is comprised so that. The cylindrical ceramic body 11 is gripped by the gripping portion 38 above the metal tube 12, and after the positioning of the metal tube 12 is finished, the gripping by the gripping portion 38 is released and falls toward the metal tube 12. It is preferable that it is comprised. The cylindrical ceramic body 11 whose grip has been released passes between the pair of support rollers 43 and reaches the second guide portion 33. The cylindrical ceramic body 11 that has reached the second guide portion 33 is adjusted in posture by the second guide portion 33 and inserted into the metal tube 12 positioned by the first guide portion 32. In addition, the metal tube 12 and the cylindrical ceramic body 11 are members for manufacturing a heat conductive member, and are not components of the heat conductive member manufacturing apparatus 100 of this embodiment.

The first guide part and the second guide part may be independent from each other, or the first guide part and the second guide part may be integrated. When the first guide part and the second guide part are independent from each other, the first guide part and the second guide part are arranged coaxially with respect to the insertion direction of the cylindrical ceramic body 11. Tei Ru. The 1st guide part 32 and the 2nd guide part 33 in the heat conductive member manufacturing apparatus 100 of this embodiment are the same as the 1st guide part and the 2nd guide part demonstrated with the manufacturing method of the heat conductive member of this embodiment. What was comprised can be used suitably. For example, the heat conducting member manufacturing jig 31 shown in FIG. 6 and the heat conducting member manufacturing jig 31B shown in FIG. 11 are used as the first guide portion 32 and the second guide portion 33 in the heat conducting member manufacturing apparatus 100. it can.

  In addition, the second guide portion has an appropriate position in the radial direction of the cylindrical ceramic body with respect to one opening end surface of the positioned metal tube when the cylindrical ceramic body passes through the second guide portion. It is preferable to guide so that Moreover, it is preferable that a 2nd guide part has a 2nd taper part which the internal diameter of a 2nd guide part reduces toward a 1st guide part. At this time, it is more preferable that the minimum inner diameter of the second tapered portion of the second guide portion matches the inner diameter of the metal tube positioned by the first guide portion by thermal expansion. Further, a configuration in which the minimum inner diameter of the second taper portion of the second guide portion is configured to be smaller than the inner diameter of the metal tube positioned by the first guide portion by thermal expansion is also a more preferable aspect. One.

The heat conducting member manufacturing apparatus 100 of this embodiment further includes a receiving jig 40 that supports the bottom surface side of the metal tube 12. The receiving jig 40 is configured to be movable up and down toward the first guide portion 32, and can move the metal tube 12 into the first guide portion 32. When moving the metal tube 12 into the first guide portion 32, it is preferable to move the metal tube 12 and the first guide portion 32 so that they do not come into contact with each other in the state before heating. That is, in the state before heating, the metal tube 12 and the first guide portion 32 do not come into contact with each other, and the metal tube 12 and the first guide portion 32 come into contact with each other due to thermal expansion during heating. Is preferred. In the heat conducting member manufacturing apparatus 100 of the present embodiment, the metal tube 12 contacts at least a part of the inner peripheral surface of the first guide portion 32 by thermal expansion, and one open end surface of the metal tube 12 is positioned. The

  Further, in the heat conducting member manufacturing apparatus 100 of the present embodiment, the furnace body wall 42 is disposed so as to surround the periphery of the metal tube 12. Examples of the furnace wall 42 include those formed of quartz glass. Furthermore, the heat conductive member manufacturing apparatus 100 of the present embodiment may further include a heater 41 for heating the metal tube 12. An example of the heater 41 is an induction heater. It is preferable that the heater 41 can raise the temperature of the metal tube 12 to 1000 ° C. or higher.

  Moreover, the heat conductive member manufacturing apparatus 100 according to the present embodiment may further include a weight 39 for disposing on the end surface of the cylindrical ceramic body facing vertically upward. The weight 39 is disposed on an end surface of the cylindrical ceramic body that faces vertically upward, and the cylindrical ceramic body 11 is dropped toward the metal tube 12 together with the weight 39. Thereby, since the cylindrical ceramic body 11 is dropped in a state where the gravity of the weight 39 is added, the insertion into the metal tube 12 is smoothly performed without any trouble. A wire (not shown) is connected to the weight 39, and after the cylindrical ceramic body 11 is inserted into the metal tube 12, the weight 39 can be pulled up using this wire. It is preferable.

(3) Heat conduction member manufacturing jig:
Next, one embodiment of the jig for producing a heat conductive member of the present invention will be described. The jig for manufacturing a heat conduction member of the present embodiment is a jig for manufacturing a heat conduction member that can be suitably used in the methods for manufacturing a heat conduction member described so far. That is, the jig for manufacturing a heat conduction member according to the present embodiment includes a first guide portion 32 for positioning an end portion on one opening end face side of a cylindrical metal tube as shown in FIG. The member manufacturing jig 31 can be mentioned. In this heat conducting member manufacturing jig 31, the first guide portion 32 is configured to position one open end face of the metal tube that has spread in the radial direction due to thermal expansion. In the heat conduction member manufacturing jig 31 of this embodiment, the metal tube contacts at least a part of the inner peripheral surface of the first guide portion 32 by thermal expansion, and one open end surface of the metal tube is positioned. Ru is. Moreover, the heat conduction member manufacturing jig 31 of the present embodiment may further include a second guide portion 33 for adjusting the posture of the cylindrical ceramic body. In addition, it is preferable that the jig 31 for heat conductive member manufacture of this embodiment is comprised similarly to the jig for heat conductive member manufacturing demonstrated in the manufacturing method of the heat conductive member of this embodiment.

  Moreover, as another embodiment of the jig for manufacturing a heat conducting member of the present invention, a first guide portion 32B for positioning an end portion on one opening end face side of a cylindrical metal tube as shown in FIG. The heat conduction member manufacturing jig 31B provided may be mentioned. This heat conduction member manufacturing jig 31B may further include a second guide portion 33B for adjusting the posture of the cylindrical ceramic body.

(4) Heat exchanger:
Next, the heat exchanger using the heat conductive member manufactured by the manufacturing method of the heat conductive member of this invention is demonstrated. FIG. 17 is a perspective view schematically showing a heat exchanger using the heat conducting member produced by one embodiment of the method for producing a heat conducting member of the present invention. As shown in FIG. 17, the heat exchanger 30 is formed by a heat conducting member 10 and a casing 21 that includes the heat conducting member 10 therein. The heat conducting member 10 includes the honeycomb structure 1 as the cylindrical ceramic body 11 and the metal tube 12 as described above. The cells 3 of the honeycomb structure 1 as the cylindrical ceramic body 11 serve as the first fluid circulation part 5 through which the first fluid flows. The heat exchanger 30 is configured such that a first fluid having a temperature higher than that of the second fluid flows in the cells 3 of the honeycomb structure 1. In addition, an inlet 22 and an outlet 23 for the second fluid are formed in the casing 21, and the second fluid circulates on the outer peripheral surface 12 h of the metal tube 12 of the heat conducting member 10.

  That is, the second fluid circulation portion 6 is formed by the inner surface 24 of the casing 21 and the outer peripheral surface 12 h of the metal tube 12. The second fluid circulation part 6 is a second fluid circulation part formed by the casing 21 and the outer peripheral surface 12 h of the metal tube 12. The second fluid circulation part 6 and the first fluid circulation part 5 are separated by the partition walls 4 and the metal pipes 12 of the honeycomb structure 1, and can conduct heat by the partition walls 4 and the metal pipes 12. . That is, the heat exchanger 30 receives the heat of the first fluid flowing through the first fluid circulation portion 5 through the partition wall 4 and the metal pipe 12, and transfers the heat to the heated object that is the second fluid. Is. The first fluid and the second fluid are separated from each other in a liquid-tight and air-tight manner, and these fluids are configured not to mix.

  The first fluid circulation portion 5 is formed as a honeycomb structure. In the case of the honeycomb structure, when the fluid passes through the cell 3, the fluid cannot flow into another cell 3 by the partition wall 4, and this fluid The honeycomb structure 1 proceeds linearly from the inlet to the outlet. Moreover, it is preferable that the opening end part of the cell 3 is not plugged in the honeycomb structure 1 in the heat exchanger 30 of the present embodiment. By comprising in this way, the heat-transfer area of a fluid increases and the size of the heat exchanger 30 can be made small. Therefore, the amount of heat transfer per unit volume of the heat exchanger 30 can be increased. Furthermore, since it is not necessary to process the honeycomb structure 1 such as forming plugged portions or forming slits, the manufacturing cost of the heat exchanger 30 can be reduced.

  It is preferable that the heat exchanger 30 circulates the first fluid having a temperature higher than that of the second fluid and conducts heat from the first fluid to the second fluid. When gas is circulated as the first fluid and liquid is circulated as the second fluid, heat exchange between the first fluid and the second fluid can be performed efficiently. That is, the heat exchanger 30 of this embodiment can be applied as a gas / liquid heat exchanger.

  The heating body, which is the first fluid to be circulated through the heat exchanger 30 having the above configuration, is not particularly limited as long as it is a medium having heat. For example, if it is gas, the exhaust gas of a motor vehicle etc. are mentioned. In addition, the medium to be heated, which is the second fluid that takes heat from the heating body (exchanges heat), is not particularly limited as a medium, as long as the temperature is lower than that of the heating body.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to these Examples.

(Example 1; Production Example A)
After extruding a clay containing ceramic powder into a desired shape, drying, processing to a predetermined external dimension, and then impregnating and firing Si, the material is silicon carbide, the body size is 46.7mm outer diameter, 100mm length A cylindrical (tubular) honeycomb structure was manufactured. That is, a honeycomb structure was used as the cylindrical ceramic body. The cell density of the honeycomb structure is 23.3 cells / cm ² , the partition wall thickness (wall thickness) is 0.3 mm, the thermal conductivity of the honeycomb structure is 150 W / m · K, and the thermal expansion between room temperature and 800 ° C. The coefficient was 4.2 × 10 ⁻⁶ / ° C. In this specification, room temperature means 20 ° C.

  Next, a graphite sheet with an acrylic adhesive (trade name: HT-710A, manufactured by Kaga Tech Co., Ltd.) was attached to the outer peripheral surface of the honeycomb structure. A graphite sheet having a thickness of 0.25 mm, a thermal conductivity of 6 W / m · K in the thickness direction, and a Young's modulus of about 0.1 GPa was used. In Example 1, although the graphite sheet with an adhesive material was used, you may adhere | attach a graphite sheet using a heat conductive adhesive separately.

As a metal tube, a SUS tube (SUS304: thermal expansion coefficient between room temperature (20 ° C.) and 1050 ° C. of 19.4 × 10 ⁻⁶ / ° C.) having a wall thickness of 0.4 mm, an inner diameter of 47.0 mm, and a length of 120 mm was produced. . The cylindricity of this metal tube was 0.3. The shrinkage fit Δ between this metal tube and the honeycomb structure is 0.2 mm. The cylindricity was measured with a three-dimensional measuring device.

Next, the metal pipe 12 and the honeycomb structure 1 (tubular ceramic body 11) were shrink-fitted by a method as shown in FIG. 5 to manufacture a heat conduction member. At this time, the heat conducting member manufacturing jig 31 provided with the first guide part 32 and the second guide part 33 was used. As shown in FIG. 6, the heat conduction member manufacturing jig 31 is a hollow cylindrical structure jig, has a first guide portion 32 on the bottom surface 31 y side, and has an upper surface 31 x side of the heat conduction member manufacturing jig 31. In addition, the second guide portion 33 is provided. The heat conducting member manufacturing jig 31 has a second guide portion 33 formed in a tapered shape in which the inner diameter on the upper surface 31 x side is reduced from the upper surface 31 x toward the first guide portion 32. Further, a connection path is formed between the first guide part 32 and the second guide part 33, and the honeycomb structure 1 whose posture is adjusted by the second guide part 33 passes through this connection path. The first guide portion 32 is configured to be inserted into the metal tube 12. The heat conductive member manufacturing jig has a thermal conductivity of 30 W / (m · K) at room temperature (20 ° C.), a thermal conductivity of 300 W / (m · K), between room temperature (20 ° C.) and 300 ° C. The one made of alumina having a thermal expansion coefficient of 7.2 × 10 ⁻⁶ / ° C. was used.

  Specifically, first, the metal tube 12 at 25 ° C. (room temperature) was placed on the receiving jig 40, the receiving jig 40 was raised, and the metal tube 12 was moved into the first guide portion 32. The movement of the receiving jig 40 was stopped when the metal tube 12 was inserted into the first guide portion 32 by 0.1 mm or more in the axial direction. Next, the metal tube 12 was heated to about 1000 to 1100 ° C. with an induction heater. The metal tube 12 thermally expands due to this temperature rise, but the expansion due to the thermal expansion of the end portion on one opening end surface side of the metal tube 12 is partly expanded by the inner peripheral surface of the first guide portion 32. Be bound. After thermal expansion until the entire outer peripheral surface of the metal tube 12 was in contact with the inner peripheral surface of the first guide portion 32, the honeycomb structure 1 was dropped from above the metal tube 12 with one end surface thereof facing downward. . The posture of the honeycomb structure 1 is adjusted in the process of passing through the tapered second guide portion 33, and the dropping allows the honeycomb structure 1 to be brought into contact without bringing the metal tube 12 and the honeycomb structure 1 into contact with each other. The metal tube 12 was inserted. In a state where the entire axial direction of the honeycomb structure 1 is inserted into the metal tube 12, the metal tube 12 and the honeycomb structure 1 are cooled to 70 ° C. or less, and the metal tube 12 and the honeycomb structure 1 are shrink-fitted. did. Table 1 shows “cylindricity of metal tube” and “shrink fit Δ”.

  Moreover, it evaluated by the following evaluation criteria about the shrink fit at the time of manufacture of a heat conductive member. The evaluation results are shown in the “shrink fit result” column of Table 1. The evaluation criterion is that the honeycomb structure 1 can be inserted into the metal tube 12 during shrink fitting, and the honeycomb structure 1 is shrink-fitted at a predetermined position in the metal tube 12 by cooling. “Good”. In addition, when the honeycomb structure 1 cannot be inserted into the metal tube 12, or after being inserted into the metal tube 12, the honeycomb structure 1 is not dropped to a predetermined position in the middle of the metal tube 12 in the axial direction. When it stops, it is defined as “bad”.

(Example 1; Production Examples B to H)
A heat conducting member was produced in the same manner as in Production Example A of Example 1 except that the cylindricity of the metal tube and the shrinkage fit Δ were changed as shown in Table 1. The shrinkage fit was changed by adjusting the dimensions of the outer shape processing of the honeycomb structure. About the shrink fitting at the time of manufacture of a heat conductive member, it evaluated on the same evaluation criteria as the manufacture example A of Example 1. FIG. The evaluation results are shown in the “shrink fit result” column of Table 1. The cylindricity indicates the magnitude of deviation from the geometric cylinder, and the smaller the cylindricity, the better the cylindricity.

(Comparative Example 1; Production Examples I to M)
First, in Production Examples I to M of Comparative Example 1, first, a honeycomb structure and a metal tube were produced by the same method as Production Example A of Example 1. In Production Examples I to M of Comparative Example 1, when the metal pipe and the honeycomb structure are shrink-fitted to produce a heat conduction member, a heat conduction member production jig 31 as shown in FIG. 6 is used. I did a shrink fit. Specifically, first, the metal tube was heated to about 1000 to 1100 ° C. with an induction heater in a state where the periphery of the metal tube was not restrained at all, and the metal tube was thermally expanded. Next, the honeycomb structure was inserted from above the metal tube with one end face facing downward. About the shrink fitting at the time of manufacture of a heat conductive member, it evaluated on the same evaluation criteria as the manufacture example A of Example 1. FIG. The evaluation results for Production Examples I to M of Comparative Example 1 are shown in the “shrink fit result” column of Table 1.

(Result 1)
In Production Examples A to H of Example 1, contact between the end face of the metal tube and the honeycomb structure (tubular ceramic body) could be effectively prevented, and good shrinkage could be performed. . Further, even when a metal tube with poor cylindricity was used, the cylindricity of the metal tube could be improved during thermal expansion, and the honeycomb structure could be easily inserted. In addition, since the honeycomb structure is aligned by passing through the second guide portion, it is not necessary to highly accurately align the honeycomb structure to be input with respect to the positioned metal pipe, and it is extremely simple. A honeycomb structure could be inserted. In particular, contact between the metal tube and the honeycomb structure could be suppressed even when the shrinkage fit Δ was large.

  On the other hand, in Production Example I of Comparative Example 1, shrink fitting was possible, but in the other Production Examples J to M, the honeycomb structure stopped at the entrance of the metal tube and could not be inserted. The fit result was bad. Thus, in Comparative Example 1 which is a conventional manufacturing method, for example, when a metal tube having a cylindricity of 0.3 is used, the shrinkage fit Δ is 0 to 0.3. In other words, in the manufacturing method of Comparative Example 1, as can be seen from the results of Manufacturing Examples I to K, 0.3 is the limit for the shrink fit. In addition, in the manufacturing method of Comparative Example 1, even if the shrink fit Δ is 0.3, the shrink fit result becomes poor due to a slight difference in the shrink fit process. Is also possible. In the manufacturing method of Comparative Example 1, when a metal tube having a cylindricity of 0.6 was used, the shrink fit result was poor even if the shrink fit margin Δ was 0.1.

  On the other hand, in the manufacturing method of Example 1, as can be seen from the results of Manufacturing Examples A to E, when a metal tube having a cylindricity of 0.3 is used, the shrink fit Δ is 0 to 0.0. Up to 45 is possible. Further, even when a metal tube having a cylindricity of 0.6 is used, the shrinkage fit Δ can be 0 to 0.45. In this example, the maximum value of the shrinkage fit Δ was verified to 0.45. However, in Production Examples D and H where the shrinkage fit Δ was 0.45, the inside of the metal tube was very smoothly performed. Since the honeycomb structure could be inserted into this, it is expected that a good shrinkage fit result can be obtained even when the shrinkage fit Δ is 0.45 or more. Thus, in the manufacturing method of Example 1, even when the shrinkage fit Δ is large, the contact between the metal tube and the honeycomb structure can be suppressed, and the shrinkage fit results in the cylinder of the metal tube. It turns out that it is hard to be influenced by good or bad. For this reason, according to the manufacturing method of Example 1, for example, even when a relatively inexpensive metal tube with poor roundness is used, a relatively expensive metal tube with good roundness is used. An equivalent heat conducting member can be manufactured. Further, even when high-temperature heating is difficult due to restrictions on the material of the metal tube, it is possible to manufacture at a low temperature with a good shrink fit Δ.

( Reference Example 2: Production Example N)
After extruding the clay containing ceramic powder into a desired shape, drying, processing to the desired outer dimensions, and then impregnating and firing Si, the material is silicon carbide, the body size is 55.3mm outer diameter, 12mm length A cylindrical (tubular) honeycomb structure was manufactured. That is, a honeycomb structure was used as the cylindrical ceramic body. The cell density of the honeycomb structure is 7.8 cells / cm ² , the partition wall thickness (wall thickness) is 0.5 mm, the thermal conductivity of the honeycomb structure is 150 W / m · K, and room temperature (20 ° C.) to 800 ° C. The thermal expansion coefficient between them was 4.2 × 10 ⁻⁶ / ° C.

As a metal tube, a SUS tube having a wall thickness of 1.0 mm, an inner diameter of 55.0 mm, and a length of 40 mm (folite SUS430J1L: coefficient of thermal expansion between room temperature (20 ° C.) and 1050 ° C. 13.2 × 10 ⁻⁶ / ° C.) Produced. The cylindricity of this metal tube was 0.3. The shrinkage fit Δ between this metal tube and the honeycomb structure is 0.3 mm. The cylindricity was measured with a three-dimensional measuring device.

Next, the metal pipe 62 and the cylindrical ceramic body 61 (honeycomb structure 1) were shrink-fitted by a method as shown in FIG. 15 to manufacture a heat conduction member. At this time, the heat conducting member manufacturing jig 31 provided with the first guide part 32 and the second guide part 33 was used. As shown in FIG. 6, the heat conduction member manufacturing jig 31 is a hollow cylindrical structure jig, has a first guide portion 32 on the bottom surface 31 y side, and has an upper surface 31 x side of the heat conduction member manufacturing jig 31. In addition, the second guide portion 33 is provided. A jig made of cemented carbide (metal matrix composite material) was used as the jig for manufacturing the heat conduction member. The thermal conductivity of the jig for manufacturing a heat conductive member at room temperature (20 ° C.) is 38 W / m · K, and the coefficient of thermal expansion of the jig for manufacturing a heat conductive member between room temperature (20 ° C.) and 300 ° C. is It was 6.4 × 10 ⁻⁶ / ° C.

In Production Example N of Reference Example 2, the cylindrical ceramic 61 is fixed by a fixing jig 51 disposed at the tip of the shaft 50, and the shaft 50 is lowered at a constant speed, whereby the cylindrical ceramic 61 is moved. 61 was inserted into the metal tube 62. Specifically, first, the metal tube 62 at 25 ° C. (normal temperature) was placed on the receiving jig 40, the receiving jig 40 was raised, and the metal tube 62 was moved into the first guide portion 32. The movement of the receiving jig 40 was stopped when the metal tube 62 was inserted into the first guide portion 32 by 0.1 mm or more in the axial direction. Next, the metal tube 62 was heated to about 1000 to 1100 ° C. with an induction heater. The metal tube 62 is thermally expanded by this temperature rise, but the expansion due to the thermal expansion of the end portion of the one end surface of the metal tube 62 is partly expanded by the inner peripheral surface of the first guide portion 32. Be bound. As described above, the honeycomb structure 1 fixed by the fixing jig 51 provided at the tip of the shaft 50 is disposed above the metal tube 62. After thermal expansion until the entire outer peripheral surface of the metal tube 62 abuts on the inner peripheral surface of the first guide portion 32, the shaft 50 on which the honeycomb structure 1 is fixed is lowered at a constant speed. The posture of the honeycomb structure 1 is adjusted in the process of passing through the tapered second guide portion 33, and the honeycomb structure 1 is placed in the metal tube 62 without contacting the metal tube 62 and the honeycomb structure 1. Inserted into. In a state where the entire axial direction of the honeycomb structure 1 is inserted into the metal tube 62, the metal tube 62 and the honeycomb structure 1 are cooled to 70 ° C. or less, and the metal tube 62 and the honeycomb structure 1 are shrink-fitted. did. Table 1 shows “cylindricity of metal tube” and “shrink fit Δ”.

  Moreover, it evaluated by the evaluation criteria similar to the manufacture example A of Example 1 about the shrink fit at the time of manufacture of a heat conductive member. The evaluation results are shown in the “shrink fit result” column of Table 1.

( Reference Example 2: Production Examples O and P)
A heat conducting member was produced in the same manner as in Production Example N of Reference Example 2 except that the cylindricity of the metal tube and the shrink fit Δ were changed as shown in Table 1. About the shrink fitting at the time of manufacture of a heat conductive member, it evaluated by the same evaluation criteria as the manufacture example N of the reference example 2. FIG. The evaluation results are shown in the “shrink fit result” column of Table 1. The cylindricity indicates the magnitude of deviation from the geometric cylinder, and the smaller the cylindricity, the better the cylindricity.

(Comparative Example 2; Production Examples Q and R)
First, in Production Examples Q and R of Comparative Example 2, first, a honeycomb structure and a metal tube were produced by the same method as in Production Example N of Reference Example 2. In the manufacture examples Q and R of the comparative example 2, when the metal pipe and the honeycomb structure are shrink-fitted to manufacture the heat conductive member, the heat conductive member manufacturing jig 31 as shown in FIG. 6 is used. I did a shrink fit. Specifically, first, the metal tube was heated to about 1000 to 1100 ° C. with an induction heater in a state where the periphery of the metal tube was not restrained at all, and the metal tube was thermally expanded. In addition, a honeycomb structure fixed by a fixing jig disposed at the tip of the shaft is disposed above the metal tube. Next, the shaft on which the honeycomb structure was fixed was lowered from above the metal tube at a constant speed, and the honeycomb structure was inserted with one end face facing downward. About the shrink fitting at the time of manufacture of a heat conductive member, it evaluated on the same evaluation criteria as the manufacture example A of Example 1. FIG. The evaluation results for Production Examples Q and R of Comparative Example 2 are shown in the “shrink fit result” column of Table 1.

(Result 2)
In Production Examples N to P of Reference Example 2, contact between the end face of the metal tube and the honeycomb structure (tubular ceramic body) could be effectively prevented, and good shrinkage could be performed. . In addition, the honeycomb structure is fixed by a fixing jig disposed at the tip of the shaft, and the honeycomb structure is inserted into the metal tube while maintaining the level of the honeycomb structure (while suppressing the inclination), so that it passes through the entrance of the metal tube. Even after this, the honeycomb structure did not tilt, and a very good shrink fit could be realized. On the other hand, in Production Examples Q and R of Comparative Example 2, the honeycomb structure stopped at the entrance of the metal tube and could not be inserted, resulting in poor fit results. In Comparative Example 2, since the material has a small coefficient of thermal expansion, even if the shrink fit margin Δ is 0.11, the shrink fit result is poor as in Production Example R of Comparative Example 2. It was.

  The manufacturing method of the heat conductive member of this invention can be utilized for the method of manufacturing the heat conductive member for heat exchange with a heating body (high temperature side) and a to-be-heated body (low temperature side). The heat conductive member manufacturing apparatus and the heat conductive member manufacturing jig of the present invention can be used in the method of manufacturing a heat conductive member of the present invention.

1: honeycomb structure, 2: end face (in axial direction), 3: cell, 4: partition, 5: first fluid circulation part, 6: second fluid circulation part, 7: outer peripheral wall, 7h: (tubular ceramics) Outer peripheral surface, 10, 10B, 10C: heat conducting member, 11, 11B, 61: cylindrical ceramic body, 12, 12C, 62: metal tube, 12a: end of (metal tube), 12h: (metal) 20) central axis, 21: casing, 22: inlet of (second fluid), 23: outlet of (second fluid), 24: inner surface of (casing), 30: heat exchange 31, 31 B: heat conduction member manufacturing jig, 31 x: upper surface (of heat conduction member manufacturing jig), 31 y: bottom surface (of heat conduction member manufacturing jig), 32, 32 B: first guide part, 33, 33B: second guide part, 34: first taper part, 35: second taper part, 38: gripping part 39: weight, 40: receiving jig, 41: heater, 42: furnace wall 43: the supporting roller 50: shaft, 51: fixing jig, 100: heat-conducting member manufacturing apparatus.

Claims (15)

Inserting a cylindrical ceramic body from one open end surface of the cylindrical metal tube, and comprising a shrink fitting process of shrink fitting the metal tube and the cylindrical ceramic body inserted into the metal tube,
By a first guide part that positions the one opening end surface of the metal pipe that has spread in the radial direction due to thermal expansion, the second guide part that positions the metal pipe and adjusts the posture of the cylindrical ceramic body, A method of manufacturing a heat conduction member, which adjusts the attitude of the cylindrical ceramic body and inserts the cylindrical ceramic body into the positioned metal tube,
The first guide part is made of ceramics and is configured such that its inner diameter is larger than the outer diameter of the metal tube before thermal expansion, and
The first guide part and the second guide part are arranged coaxially with respect to the axial direction when inserting the cylindrical ceramic body,
The first guide part and the second guide part are integrated with a heat conduction member manufacturing jig,
In the first guide portion, an end portion on the one opening end face side of the metal tube in a state before heating is disposed , and the metal tube is thermally expanded on at least a part of the inner peripheral surface of the first guide portion. And the expansion due to the thermal expansion of the end of the one side of the opening of the metal tube is constrained by the inner peripheral surface of the first guide portion, whereby the one of the one of the metal tubes The manufacturing method of the heat conductive member by which an opening end surface is positioned.   2. The method of manufacturing a heat conducting member according to claim 1, wherein the first guide portion has a first tapered portion in which an inner diameter of the first guide portion decreases toward the second guide portion. The second guide portion is positioned in a radial direction of the cylindrical ceramic body with respect to the one opening end surface of the metal pipe positioned by passing the cylindrical ceramic body through the second guide portion. method for producing a thermally conductive member according to claim 1 or 2 is to guide so that the correct position. The second guide portion, toward the first guide portion, the thermal conductivity according to any one of the second guide portion according to claim 1 to 3 and has a second tapered portion whose inner diameter is reduced in Manufacturing method of member. The minimum inner diameter of the second taper portion of the second guide portion coincides with the inner diameter of the metal tube positioned by the first guide portion by thermal expansion, or the second taper portion of the second guide portion. The method for manufacturing a heat conducting member according to claim 4 , wherein a minimum inner diameter of the portion is configured to be smaller than an inner diameter of the metal tube that is thermally expanded and positioned by the first guide portion. The cylindrical ceramic body is dropped from vertically above one opening end face of the metal tube and inserted into the positioned metal tube. The heat conducting member according to any one of claims 1 to 5 . Production method. The method for manufacturing a heat conductive member according to any one of claims 1 to 6 , wherein the cylindrical ceramic body is a heat conductive member containing SiC as a main component. The method for manufacturing a heat conducting member according to any one of claims 1 to 7 , wherein the cylindrical ceramic body has a honeycomb structure in which a plurality of cells are partitioned by partition walls. A first guide portion for positioning the metal tube by contacting with an end portion on one opening end face side of the cylindrical metal tube, and a second guide portion for adjusting the posture of the cylindrical ceramic body,
The first guide portion is for positioning the one open end surface of the metal tube that has spread in the radial direction due to thermal expansion;
The cylindrical ceramic body whose posture is adjusted by the second guide portion is inserted from the one opening end surface of the metal tube positioned by the first guide portion, and is inserted into the metal tube and the metal tube. A heat conductive member manufacturing apparatus in which the cylindrical ceramic body is shrink-fitted,
The first guide part is made of ceramics and is configured such that its inner diameter is larger than the outer diameter of the metal tube before thermal expansion, and
The first guide part and the second guide part are arranged coaxially with respect to the axial direction when inserting the cylindrical ceramic body,
The first guide part and the second guide part are integrated with a heat conduction member manufacturing jig,
In the first guide portion, an end portion on the one opening end face side of the metal tube in a state before heating is disposed , and the metal tube is thermally expanded on at least a part of the inner peripheral surface of the first guide portion. And the expansion due to thermal expansion of the end portion on the one opening end surface side of the metal tube is constrained by the inner peripheral surface of the first guide portion, and the metal tube The heat conductive member manufacturing apparatus in which one opening end face is positioned. The heat conducting member manufacturing apparatus according to claim 9 , wherein the first guide portion has a first tapered portion in which an inner diameter of the first guide portion decreases toward the second guide portion. The second guide portion is positioned in a radial direction of the cylindrical ceramic body with respect to the one opening end surface of the metal pipe positioned by passing the cylindrical ceramic body through the second guide portion. The heat conduction member manufacturing apparatus according to claim 9 or 10 , wherein the guide is performed so that the position is in an appropriate position. The heat conduction according to any one of claims 9 to 11 , wherein the second guide part has a second tapered part in which an inner diameter of the second guide part decreases toward the first guide part. Member manufacturing equipment. The minimum inner diameter of the second taper portion of the second guide portion coincides with the inner diameter of the metal tube positioned by the first guide portion by thermal expansion, or the second taper portion of the second guide portion. The heat conduction member manufacturing apparatus according to claim 12 , wherein a minimum inner diameter of the portion is configured to be smaller than an inner diameter of the metal tube that is thermally expanded and positioned by the first guide portion. The cylindrical ceramic body is further provided with a gripping part that grips the cylindrical ceramic body vertically above one opening end surface of the metal tube, and by releasing the gripping by the gripping part, the cylindrical ceramic body is The heat conductive member manufacturing apparatus according to any one of claims 9 to 13 , wherein the heat conductive member manufacturing apparatus is configured to drop toward the head. A thermally conductive member manufacturing jig for use in heat-conducting member manufacturing apparatus according to any one of claims 9-14,
The first guide portion for positioning one end of the cylindrical metal tube on the side of the opening end surface , and the second guide portion for adjusting the posture of the cylindrical ceramic body , the first guide portion and the first guide The two guide portions are arranged coaxially, and the first guide portion positions the one open end surface of the metal pipe that has spread in the radial direction due to thermal expansion. .

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