JP6523415B2 - METHOD OF MANUFACTURING HEAT CONDUCTING MEMBER, HEAT CONDUCTING MEMBER MANUFACTURING DEVICE, AND JIG FOR MANUFACTURING HEAT CONDUCTING MEMBER - Google Patents

Description

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

  Heat can be used effectively by exchanging heat from the high temperature fluid to the low temperature fluid. For example, there is a heat recovery technology for recovering heat from high temperature gas such as combustion exhaust gas from an engine or the like. As gas / liquid heat exchangers, radiators of automobiles, finned tube heat exchangers such as outdoor units of air conditioning, etc. are generally used.

  It may also be used for heating, cooling and condensation of corrosive fluids in the chemical and pharmaceutical industries etc. In this case, acid (bromic acid, sulfuric acid, hydrofluoric acid, nitric acid, hydrochloric acid etc.), alkali (caustic alkali etc.) ), Halides, saline, and organic compounds may be targets for heat exchange. Specifically, the heat exchanger is used, for example, as a heat exchange part for hydrogen production (sulfuric acid evaporator), an automobile exhaust part, etc., and may be used at 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 to be the heat exchange body is structured to be stored in the metal container located on the outside, and even if the ceramic is broken inside, the fluid is not mixed with each other. (Patent Document 1). In the case of coating the cylindrical ceramic body with metal, high reliability and stable heat transfer characteristics are required. In addition, low cost is also required when used as automobile parts and the like.

International Publication No. 2012/067156

  As a typical method of coating a cylindrical ceramic body with metal, a shrink-fit method is known in which a metal tube is heated, and after inserting the cylindrical ceramic body, it is cooled (baked). For shrink fitting, it is necessary that the inner diameter of the metal tube ≦ the outer diameter of the cylindrical ceramic body. And "(DELTA) = outer diameter of cylindrical ceramic body-inner diameter of metal pipe" may be called a shrink-fit margin. This shrink-fit is one of the most contributing factors to the heat transfer characteristics and the reliability of the heat conducting member, and is the most careless parameter in manufacturing. The inner diameter of the metal tube is equal to or greater than the outer diameter of the cylindrical ceramic body at the time of heating.

  As such a shrink-fit margin, there is an advantage that it is easier to obtain better and stable heat transfer characteristics if it is possible to secure as large as possible. However, the conventional method for manufacturing a heat conductive member has the following problems. First, there is the problem of the accuracy of the metal tube and the cylindrical ceramic body that constitute the heat conducting member. That is, when the accuracy of the metal pipe and the cylindrical ceramic body, such as the degree of cylindricality or roundness, is poor, the insertion of the cylindrical ceramic body into the metal pipe may be difficult. For example, in the case of performing shrink fitting at a certain temperature, if the metal pipe has poor cylindricity or roundness, the range of the shrink fitable shrink fit becomes narrow and a large shrink fit is obtained. Will be difficult. In addition, in the case of preparing a metal tube or cylindrical ceramic body excellent in cylindricality and roundness in advance, additional machining of the metal pipe is necessary, or the outer peripheral surface of the cylindrical ceramic body is separately prepared. Since the grinding process is required, the manufacturing cost is greatly increased.

  In addition, in the conventional method of manufacturing a heat conducting member, there is also a problem that when the cylindrical ceramic body is inserted into the heated metal pipe, the alignment between the metal pipe and the cylindrical ceramic body is difficult. That is, when inserting a cylindrical ceramic body into a heated metal pipe, alignment with high accuracy is required, and in the conventional manufacturing method, a complicated process is required for alignment. In addition, if the above-described alignment is not properly performed, the cylindrical ceramic body may come in contact with the end face of the metal tube when the cylindrical ceramic body is inserted. When the metal pipe and the cylindrical ceramic body come in contact with each other, the heat of the metal pipe is taken away by the cylindrical ceramic body, and the thermally expanded metal pipe 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 when the metal tube contracts due to the above-mentioned contact, the inner diameter of the metal tube becomes the same as that of the cylindrical ceramic body. It may be smaller than the outer diameter. In such a state, the cylindrical ceramic body can not be inserted into the metal tube.

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

  According to the present invention, the following method of manufacturing a heat conducting member, a heat conducting member manufacturing apparatus, and a jig for producing a heat conducting member are provided.

[1] A cylindrical ceramic body is inserted from one open end surface of the cylindrical metal pipe, and the metal pipe and the cylindrical ceramic body inserted into the metal pipe are shrink-fitted and provided with a shrinking step. The second guide portion positions the metal pipe and adjusts the posture of the cylindrical ceramic body by the first guide portion which positions the one open end face of the metal pipe expanded in the radial direction by thermal expansion. A method for manufacturing a heat conducting member, wherein the cylindrical ceramic body is inserted into the metal tube positioned by adjusting the posture of the cylindrical ceramic body, the first guide portion and the second guide portion An inner diameter of the first guide portion is larger than an outer diameter of the metal pipe before thermal expansion in the axial direction in which the cylindrical ceramic body is inserted; Composed And the end portion on the side of the one open end face of the metal pipe in a state before heating is disposed in the first guide portion, and at least a part of the inner peripheral surface of the first guide portion The metal tube is brought into contact by thermal expansion, and the inner circumferential surface of the first guide portion restrains the expansion due to thermal expansion of the end on the one open end face side of the metal tube, A method of manufacturing a heat conducting member, wherein one open end face is positioned.

[2] The manufacturing of the heat conducting member according to the above [1], wherein the first guide portion has a first tapered portion in which the 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 open end surface of the metal pipe positioned by the cylindrical ceramic body passing through the inside of the second guide portion. The manufacturing method of the heat conduction member as described in said [1] or [2] which is guided so that the position of direction may turn into an appropriate position.

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

[ 5 ] The minimum inner diameter of the second tapered portion of the second guide portion is thermally expanded to coincide with the inner diameter of the metal pipe positioned by the first guide portion, or the second guide portion of the second guide portion The method for manufacturing a heat conducting member according to [ 4 ], wherein the minimum inner diameter of the second taper portion is configured to be thermally expanded and smaller than the inner diameter of the metal pipe positioned by the first guide portion. .

[ 6 ] The tubular ceramic body according to any one of the above [1] to [ 5 ], wherein the tubular ceramic body is dropped from above vertically from one open end face of the metal pipe and inserted into the positioned metal pipe. Method of manufacturing a heat conducting member

[ 7 ] The method for manufacturing a heat conduction member according to any one of the above [1] to [ 6 ], using a jig for manufacturing a heat conduction member in which the first guide portion and the second guide portion are integrated.

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

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

[ 10 ] The method for producing a heat conducting member according to any one of the above [1] to [ 9 ], wherein the first guide portion is made of a ceramic, a metal or a ceramic coating. .

[ 11 ] The method for producing a heat conducting member according to [ 10 ], wherein the first guide portion is made of ceramic.

[ 12 ] At least one kind of at least one selected from the group consisting of a ceramic of at least one of oxide, carbide, nitride, and graphitic carbon, and a metal matrix composite material containing the ceramic, [ 12 ] The manufacturing method of the heat conduction member in any one of said [1]-[ 9 ] which consists of materials.

[ 13 ] A first guide for positioning the metal pipe, a second guide for adjusting the posture of the cylindrical ceramic body, and a second guide for positioning the metal pipe by bringing the metal pipe into contact with the end on one open end side of the metal pipe And a heater for heating the metal pipe , wherein the first guide portion positions the one open end surface of the metal pipe which is expanded in the radial direction by thermal expansion, and the first guide portion The cylindrical ceramic body whose posture has been adjusted by the second guide portion is inserted from the one open end face of the metal pipe positioned by the step, and the metal pipe and the cylindrical shape inserted in the metal pipe A heat conducting member manufacturing apparatus in which a ceramic body is shrink-fit, wherein the first guide portion and the second guide portion are coaxial with an axial direction when the cylindrical ceramic body is inserted. Placed on The first guide portion, than the outer diameter of the metal tube before thermal expansion, which is configured so that its inner diameter increases, the first guide portion, said metal tube in the state before heating And the first guide portion is in contact with at least a part of the inner peripheral surface of the first guide portion by thermal expansion of the metal pipe , and The heat conduction member manufacturing apparatus is configured such that the one open end face of the metal tube is positioned by restricting the spread due to thermal expansion of the end on the one open end face side of the metal tube by the circumferential surface .

[ 14 ] The heat conducting member according to the above [ 13 ], wherein the first guide portion has a first tapered portion in which the inner diameter of the first guide portion is reduced toward the second guide portion.

[ 15 ] The second guide portion has a diameter of the cylindrical ceramic body with respect to the one open end surface of the metal pipe positioned by the cylindrical ceramic body passing through the inside of the second guide portion. The heat conduction member manufacturing apparatus according to the above [13] or [14] , which guides the position of the direction to an appropriate position.

[ 16 ] In any of the above-mentioned [ 13 ] to [ 15 ], the second guide portion has a second tapered portion in which the inner diameter of the second guide portion decreases toward the first guide portion. The heat-conductive member manufacturing apparatus as described.

[ 17 ] The minimum inner diameter of the second tapered portion of the second guide portion is thermally expanded to coincide with the inner diameter of the metal pipe positioned by the first guide portion, or the second guide portion of the second guide portion The apparatus for producing a heat conducting member according to [ 16 ], wherein the minimum inner diameter of the second tapered portion is configured to be thermally expanded and smaller than the inner diameter of the metal pipe positioned by the first guide portion.

[ 18 ] The tubular ceramic body is further provided with a gripping portion for gripping the cylindrical ceramic body vertically above one open end face of the metal pipe, and the tubular ceramic body is released by releasing the gripping by the gripping portion. The heat conducting member manufacturing apparatus according to any one of the above [ 13 ] to [ 17 ], which is configured to be dropped toward the metal pipe.

[ 19 ] The heat conduction member manufacturing apparatus according to any one of the above [ 13 ] to [ 18 ], wherein the first guide portion and the second guide portion are formed of one heat conduction member manufacturing jig.

[ 20 ] The apparatus for producing a heat conducting member according to any one of the above [ 13 ] to [ 19 ], wherein the first guide portion is made of a ceramic, a metal or a ceramic coating.

[ 21 ] The heat conducting member manufacturing apparatus according to [ 20 ], wherein the first guide portion is made of a ceramic.

[ 22 ] At least one kind of at least one selected from the group consisting of a ceramic of at least one of oxide, carbide, nitride, and graphitic carbon, and a metal matrix composite material containing the ceramic, [ 22 ] The heat conductive member manufacturing apparatus in any one of said [ 13 ]-[ 21 ] which consists of materials.

[ 23 ] The heat conduction member manufacturing apparatus according to any one of the above [13] to [22], wherein the heating means of the heater is induction heating.

[ 24 ] A jig for manufacturing a heat conduction member used in the apparatus for manufacturing a heat conduction member according to any one of the above [ 13 ] to [ 23 ], wherein an end on one open end face side of a cylindrical metal pipe is A jig for manufacturing a heat conducting member, comprising a first guide portion for positioning, wherein the first guide portion positions the one open end face of the metal pipe which is expanded in the radial direction by thermal expansion.

[ 25 ] The jig for manufacturing a heat conducting member according to the above [ 24 ], further comprising a second guide portion for adjusting the posture of the cylindrical ceramic body.

[ 26 ] The jig for manufacturing a heat conducting member according to [ 25 ], wherein the first guide portion and the second guide portion are coaxially arranged.

  According to the method of manufacturing a heat conducting member of the present invention, a heat conducting member in which a cylindrical ceramic body is covered with a metal pipe can be easily produced at low cost. That is, since the metal pipe is positioned by the first guide portion which positions one open end face of the metal pipe which is expanded in the radial direction by thermal expansion, insertion of the cylindrical ceramic body into the metal pipe becomes easy. For example, even if the cylindricity and the roundness before the thermal expansion of the metal pipe are not good, with the thermal expansion of the metal pipe, the cylindricity and the roundness of the metal pipe are improved by the first guide portion Ru. As a result, the cylindrical ceramic body can be easily inserted into the metal tube without the need for additional processing of the metal tube. In addition, since the metal pipe is positioned at the optimum position along with the thermal expansion of the metal pipe, complicated positioning operation such as image processing is not required. Furthermore, according to the method for producing a heat transfer member of the present invention, a large shrink-fit can be obtained, and a heat transfer member having better and stable heat transfer characteristics can be obtained. Furthermore, in the method for manufacturing a heat conducting member according to the present invention, the cylindrical ceramic body is inserted into the above-mentioned positioned metal pipe in a state where the posture of the cylindrical ceramic body is adjusted by the second guide portion. Therefore, contact between the end face of the metal pipe and the cylindrical ceramic body can be effectively prevented, and heat removal from the metal pipe by the cylindrical ceramic body and, consequently, thermal contraction of the thermally expanded metal pipe can be effectively prevented. be able to.

  Moreover, the heat conductive member manufacturing apparatus and the heat conductive member manufacturing jig of the present invention can be suitably used for the method of manufacturing a heat conductive member of the present invention described above. By the heat conducting member manufacturing apparatus and the heat conducting member manufacturing jig, a heat conducting member in which a cylindrical ceramic body is covered with a metal pipe can be easily produced 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 end surface of one axial direction. It is the top view seen from one end surface of the axial direction which shows typically the other example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention. It is sectional drawing cut | disconnected by the surface parallel to the axial direction which shows typically the further another example of the heat conductive member manufactured by one Embodiment of the manufacturing method of the heat conductive member of this invention. 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 the present invention. It is a schematic diagram which shows the state before a metal pipe is positioned in the process in which a metal pipe is positioned by the heat conductive member manufacturing jig shown in FIG. It is sectional drawing which shows typically the A-A 'cross section in FIG. It is a schematic diagram which shows the state in which the metal pipe was positioned in the process in which a metal pipe is positioned by the heat conductive member manufacturing jig shown in FIG. It is sectional drawing which shows typically the B-B 'cross section in FIG. 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 in which a metal pipe is positioned by the heat conductive member manufacturing jig shown in FIG. It is a schematic diagram which shows the state in which the metal pipe was positioned in the process in which a metal pipe is positioned by the heat conductive member manufacturing jig shown in FIG. It is a schematic diagram which shows the state in which a cylindrical ceramic body is inserted in the metal pipe positioned in the process in which a metal pipe is positioned by the heat conductive member manufacturing jig 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 changes, improvements, etc. can be added to the following embodiments based on the 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 is also within the scope of the present invention.

(1) Manufacturing method of heat conducting member:
One embodiment of a method of manufacturing a heat conducting member of the present invention is, for example, a manufacturing method for manufacturing the heat conducting member 10 as shown in FIGS. 1 and 2. Here, FIG. 1 is a perspective view schematically showing an example of the heat conduction member manufactured by the embodiment of the method for manufacturing the heat conduction 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, “axial direction” means, in a cylindrical metal pipe, a direction connecting one end surface of the cylindrical metal pipe and the other end surface, unless otherwise specified. In the above, it means a direction connecting one end face and the other end face of the cylindrical ceramic body. Further, in the case of referring to the axial direction of the heat conducting member, the direction connecting one end surface of the cylindrical ceramic body disposed in the metal pipe and the other end surface is taken.

(1-1) Heat conducting member:
Here, the heat conductive member manufactured by the manufacturing method of the heat conductive member of this embodiment is demonstrated. The heat conducting member 10 shown in FIG. 1 and FIG. 2 is provided with a cylindrical ceramic body 11 and a metal pipe 12 disposed on the outer peripheral side of the cylindrical ceramic body 11. The tubular ceramic body 11 is formed with a flow path extending from one end face 2 to the other end face 2. The flow path has a flow path through which the first fluid flows. The first fluid is caused to flow in the cylindrical ceramic body 11 and the second fluid, which is lower in temperature or higher in temperature than the first fluid, is caused to flow in the outer peripheral surface 12 h of the metal pipe 12. Heat exchange between the fluid and the second fluid can be performed. In the heat conducting member 10, since the metal pipe 12 is disposed on the outer peripheral side of the cylindrical ceramic body 11, the first fluid and the second fluid are separated in a fluid tight and airtight manner, Fluid mixing is effectively prevented. Moreover, since the heat conducting member 10 is provided with the metal pipe 12, it is easy to process by the installation place and the installation method, and the degree of freedom is high. The heat conducting member 10 can protect the cylindrical ceramic body 11 by the metal tube 12 and is resistant to an 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 a ceramic 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 (cylindrical shape), but is a prismatic shape having an elliptical shape in a cross section perpendicular to the axial (longitudinal) direction, an oval shape in which arcs are combined, a quadrangle or other polygons It is also good. The cylindrical ceramic body 11 preferably has a partition 4 and is a honeycomb structure 1 in which a large number of cells 3 serving as a fluid flow path are partitioned by the partition 4. By having the partition 4, the heat from the fluid flowing through the inside of the cylindrical ceramic body 11 can be efficiently collected and transmitted to the outside. FIGS. 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. In FIG. 1 and FIG. 2, reference numeral 7 indicates the outer peripheral wall of the cylindrical ceramic body 11, and reference numeral 7 h indicates the outer peripheral surface of the cylindrical ceramic body 11. Further, reference numeral 12 h denotes an outer peripheral surface of the metal pipe 12. Further, as in the case of the heat conducting member 10B shown in FIG. 3, the cylindrical ceramic body is a hollow ceramic tube formed of only the outer peripheral wall 7 without the partition wall 4 (see FIG. 2) as the cylindrical ceramic body 11B. May be used. FIG. 3 is a plan view seen from one end face in the axial direction schematically showing another example of the heat conducting member produced by the embodiment of the method for producing a heat conducting member according to the present invention. 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, as in a heat conducting member 10C shown in FIG. 4, the metal tube 12C may be longer than the axial length of the cylindrical ceramic body 11. FIG. 4 is a cross-sectional view cut along a plane parallel to the axial direction schematically showing still another example of the heat conducting member produced by the embodiment of the method for producing a heat conducting member of the present invention. If comprised in this way, it will be easy to process the edge part 12a of the metal pipe 12C according to the installation place and application of 10 C of heat conductive members. In the heat conducting member shown in FIG. 4, the same components as those of the heat conducting member shown in FIG. 1 and FIG.

  The metal pipe 12 shown in FIGS. 1 and 2 is integrated with the above-described cylindrical ceramic body 11 by shrink fitting. As the metal tube 12, one having heat resistance and corrosion resistance is preferable. 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 off from the cylindrical ceramic body 11 due to the difference in thermal expansion coefficient with the cylindrical ceramic body 11 during heat exchange.

(1-2) Method of manufacturing heat conducting member:
The method of manufacturing the heat conducting member of the present embodiment is a manufacturing method including a shrink fitting process as shown in FIG. FIG. 5: is a schematic diagram which shows the manufacturing process of one Embodiment of the manufacturing method of the heat conductive member of this invention. In the shrink-fitting step, the cylindrical ceramic body 11 is inserted from one open end face of the cylindrical metal pipe 12, and the metal pipe 12 and the cylindrical ceramic body 11 inserted into the metal pipe 12 are baked. Process. In the shrinking step, first, the inner diameter of the metal pipe 12 is temporarily expanded by heating the metal pipe 12 ((a) to (c) in FIG. 5). Next, the cylindrical ceramic body 11 is inserted into the metal pipe 12 in a state in which the inner diameter is expanded ((d) in FIG. 5). Thereafter, the metal pipe 12 is cooled and baked to obtain the heat conducting member 10 in which the metal pipe 12 and the cylindrical ceramic body 11 are integrated ((e) in FIG. 5). In FIG. 5, the metal tube 12 is supported by the receiving jig 40 on the end surface opposite to the end surface on the insertion side. The receiving jig 40 is vertically movable 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 conduction member of the present embodiment, at least a part of the inner peripheral surface of the first guide portion 32 is in contact with the metal pipe 12 by thermal expansion, and one open end face of the metal pipe 12 is It is 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 as not to be in contact with each other before heating. That is, in the state before heating, the metal pipe 12 and the first guide portion 32 do not contact, and the metal pipe 12 and the first guide portion 32 are in contact with each other by thermal expansion at the time of heating and alignment is performed. Is preferred. Further, in FIG. 5, the furnace body wall 42 is disposed around the metal pipe 12.

  In the manufacturing method of the heat conduction member of the present embodiment, first, the metal pipe 12 is positioned by the first guide portion 32 which positions one open end surface of the metal pipe 12 which is expanded in the radial direction by thermal expansion. Further, while the metal pipe 12 is positioned by the first guide portion 32 in this manner, the posture of the cylindrical ceramic body 11 is adjusted by the second guide portion 33 for the cylindrical ceramic body 11. Adjusting the posture of the cylindrical ceramic body 11 means that the end face of the cylindrical ceramic body 11 to be inserted into the metal tube 12 is positioned within one open end face of the metal tube 12. We say to correct 11 positions. Then, the cylindrical ceramic body 11 whose posture has been adjusted is inserted into the metal tube 12 positioned. With the cylindrical ceramic body 11 inserted into the metal pipe 12, the metal pipe 12 is cooled, and the metal pipe 12 and the cylindrical ceramic body 11 are shrink-fit. By comprising in this way, the heat conduction 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 conduction member of the present embodiment, the heat conduction member 10 in which the cylindrical ceramic body 11 is covered with the metal tube 12 can be manufactured easily and at low cost. That is, since the metal pipe 12 is positioned by the first guide portion 32 which positions one open end face of the metal pipe 12, insertion of the cylindrical ceramic body 11 into the metal pipe 12 is facilitated. For example, even if the cylindricity and the roundness before the thermal expansion of the metal pipe 12 are not good, with the thermal expansion of the metal pipe 12, the cylindricity and the circularity of the metal pipe 12 are the first guide portion Improved by 32. As a result, the cylindrical ceramic body 11 can be easily inserted into the metal pipe 12 even if the metal pipe 12 is not additionally processed. In particular, when the heat conducting member 10 is manufactured, a thin metal pipe 12 may be suitably used in order to prevent the heat conducting property from being deteriorated. Since such thin-walled metal tube 12 is difficult to generate roundness, it has been very difficult to smoothly insert the cylindrical ceramic body without any problem in the conventional manufacturing method. According to the manufacturing method of the heat conduction member of the present embodiment, the cylindricality and the roundness are improved by the first guide portion 32 even in the thin metal pipe 12, so that the insertion into the metal pipe is not disturbed. It will be done smoothly. Moreover, if the metal pipe 12 is thin, in the method of manufacturing the heat conduction member of the present embodiment, the improvement of the cylindricity and the roundness of the metal pipe 12 also becomes easy. Further, in the method of manufacturing the heat conduction member of the present embodiment, since the metal pipe is positioned at the optimum position along with the thermal expansion of the metal pipe, a complicated positioning operation such as image processing is not required.

  Moreover, according to the method of manufacturing a heat conducting member of the present embodiment, a large shrink-fit margin can be obtained, and a heat conducting member 10 having better and stable heat transfer characteristics can be obtained. Furthermore, in the method of manufacturing the heat conduction member according to the present embodiment, the cylindrical ceramic body 11 is inserted into the metal tube 12 positioned in the above-mentioned state in which the posture of the cylindrical ceramic body 11 is adjusted by the second guide portion 33. 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, consequently, the heat expansion of the metal tube 12 thermally expanded. The contraction can be effectively prevented.

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

  As shown in FIGS. 7 to 10, the first guide portion 32 positions one open end surface of the metal pipe 12 which is expanded in the radial direction by thermal expansion. Specifically, as shown in FIGS. 7 and 8, the first guide portion 32 is configured such that the inner diameter thereof is larger than the outer diameter of the metal pipe 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 one open end face side of the metal tube 12 is inserted in the axial direction is the first guide portion It will be 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 so as to be accommodated in the first guide portion 32 without the inner peripheral surface of the first guide portion 32 contacting the outer peripheral surface of the metal pipe 12. Note that a part of the outer peripheral surface of the metal pipe 12 may be in contact with the inner peripheral surface of the first guide portion 32 in a range that does not prevent the insertion of the metal pipe 12 into the first guide portion 32. In the present specification, "the outer diameter d of the metal tube" is an average value of the outer diameters of the points measured by measuring 8 or more outer diameters at the end face of the metal tube on which the cylindrical ceramic body is inserted. .

  Thereafter, when the metal pipe 12 disposed in the first guide portion 32 is heated, as shown in FIGS. 9 and 10, the metal pipe 12 is thermally expanded. The spread by the thermal expansion of the end on one open end face side of the metal tube 12 is restrained 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 conforming to 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 thermally expanded by itself. It is positioned by the first guide portion 32. Here, FIG. 7 is a schematic view showing a state before the metal pipe is positioned in the step of positioning the metal pipe by the heat conducting member manufacturing jig shown in FIG. FIG. 8 is a cross-sectional view schematically showing a cross section A-A 'in FIG. FIG. 9 is a schematic view showing a state in which the metal pipe is positioned in the step of positioning the metal pipe by the heat conductive member manufacturing jig shown in FIG. FIG. 10 is a cross-sectional view schematically showing a B-B 'cross section in FIG.

  According to such a manufacturing method, even if the accuracy of the cylindricality or the roundness of the metal pipe is poor, the thermal expansion is performed so that the metal pipe 12 conforms to the shape of the inner peripheral surface of the first guide portion 32. It is possible to improve the accuracy of the cylindricality and roundness of the metal tube. Further, as described above, since the metal pipe 12 is positioned by the first guide portion 32 due to the thermal expansion of the metal pipe 12 itself, positioning of one open end face of the metal pipe 12 is performed by a very simple method. be able to.

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

  In the method of manufacturing the heat conduction member according to the present embodiment, the metal pipe contacts with at least a part of the inner peripheral surface of the first guide portion by thermal expansion, and one open end face of the metal pipe is positioned . By this configuration, one open end face of the metal tube can be positioned by an extremely simple method. In other words, the thermal expansion of the metal tube positions the metal tube itself at a predetermined position.

  Further, as shown in FIG. 11, the first guide portion 32B may have a first tapered 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 heat conducting member manufacturing jig used in one embodiment of the heat conducting member manufacturing method of the present invention. A heat conducting member manufacturing jig 31B shown in FIG. 11 is a hollow cylindrical jig and has a first guide portion 32B on the bottom surface 31y side of the heat conducting member manufacturing jig 31B, and the heat conducting member manufacturing jig 31B. The second guide portion 33B is provided on the upper surface 31x side of the upper surface 31x. As shown in FIGS. 12 to 14, the first guide portion 32 </ b> B positions one open end surface of the metal pipe 12 which is expanded in the radial direction by thermal expansion. Since the first guide portion 32B has the first tapered portion 34 which reduces the inner diameter of the first guide portion, when the inner peripheral surface of the first guide portion 32B contacts the outer peripheral surface of the metal pipe 12 In addition, both come in contact with part of the first tapered portion 34. Therefore, the contact area between the first guide portion 32B and the metal pipe 12 can be reduced, and the heat removal from the metal pipe 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), thermal contraction of the metal tube 12 hardly occurs, and the metal tube 12 has an inner periphery of the first guide portion 32B. It is possible to perform thermal expansion well to conform to the shape of the surface. In addition, the first tapered portion 34 can cope with the thermal expansion change in the axial direction of the metal pipe 12. That is, when the metal pipe 12 thermally expands in the axial direction, one open end face of the metal pipe 12 abuts on the first tapered portion 34, positioning of the metal pipe 12 and roundness of the metal pipe 12 Improvements will be made. Although not shown, even if the first tapered portion 34 in FIG. 11 further includes a first guide straight portion at the inner end of the first guide portion 32B at the tip on the second guide portion 33B side. Good.

  It is preferable that as the second guide portion in the method of manufacturing the heat conduction member of the present embodiment, the cylindrical ceramic body passes the inside of the second guide portion to adjust the posture of the cylindrical ceramic body. By using the second guide portion configured in this way, for example, when the metal pipe is positioned such that one open end face thereof is directed vertically upward, the cylindrical ceramic body is dropped from above the metal pipe. By doing this, the cylindrical ceramic body can be inserted into the metal tube extremely easily. That is, in the process of falling by its own weight of the cylindrical ceramic body, alignment of the cylindrical ceramic body is performed by passing through the second guide portion. For this reason, when inserting a cylindrical ceramic body in a metal pipe, it is not necessary to necessarily hold | maintain a cylindrical ceramic body (chuck), and the insertion operation of a cylindrical ceramic body becomes very simple.

  When the cylindrical ceramic body is dropped into the metal tube, a weight may be disposed on the end face of the cylindrical ceramic body facing vertically upward, and the tubular ceramic body may be dropped along with the weight. By this configuration, since the cylindrical ceramic body falls in a state where the gravity of the weight is added, the insertion into the metal pipe can be smoothly performed without any trouble.

  In the method of manufacturing the heat conduction 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 as described above by its own weight and inserting into the metal tube. Insertion into the metal tube may be performed in the state as described above. That is, as shown in FIG. 15, the cylindrical ceramic 61 may be fixed by the 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 which shows the manufacturing process (shrinkage process) of other embodiment of the manufacturing method of the heat conductive member of this invention. Here, in FIG. 15, the same components as those shown in FIG. 5 will be assigned the same reference numerals and descriptions thereof will be omitted.

  In the shrinking step shown in FIG. 15, first, the honeycomb structure 1 (cylindrical ceramics 61) is fixed by a fixing jig 51 disposed at the tip of the shaft 50 ((a) in FIG. 15). There is no particular limitation on the fixing method by the fixing jig 51. Further, in the shrinking step, the inner diameter of the metal pipe 62 is temporarily expanded by heating the metal pipe 62 ((a) to (c) in FIG. 15). Next, the cylindrical ceramic body 61 is inserted into the metal pipe 62 in a state in which the inner diameter is expanded ((b) and (c) in FIG. 15). The shaft 50 shown in FIG. 15 is configured to be able to move up and down, and the cylindrical ceramic 61 fixed by the fixing jig 51 can be inserted into the metal tube 62 without relying on gravity. The vertical movement of the shaft 50 is preferably performed relatively slowly. After inserting the cylindrical ceramic 61 into the metal tube 62, the fixed state of the fixing jig 51 and the cylindrical ceramic 61 is released. Thereafter, the fixing jig 51 is preferably separated from the metal pipe 62 by raising the shaft 50. In the shrink-fitting step 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 tubular ceramic 61 is also one of the preferable modes. In addition, the shaft 50 may be moved in directions other than up and down. For example, although not shown, the cylindrical ceramic 61 may be inserted into the metal tube 62 opened horizontally by moving the shaft 50 in the horizontal direction.

  Here, when the ratio (L / D) of the axial length L of the cylindrical ceramic 61 to the diameter D of the end face is as small as 1 or less, the following two problems may occur. The first problem is a defect that the cylindrical ceramic 61 does not enter at the end face of the metal pipe 62. The second problem is that even if the end face of the cylindrical ceramic 61 passes, there is a defect that the cylindrical ceramic 61 is inclined during the insertion, and does not fall to a desired position. is there. In the shrinking step shown in FIG. 15, the cylindrical ceramic 61 is fixed by the fixing jig 51 disposed at the tip of the shaft 50, and the horizontal shape of the cylindrical ceramic 61 is maintained (while the inclination is suppressed). It can be inserted into the metal tube 62. Therefore, the two problems described above can be solved.

  It is preferable that the first guide portion and the second guide portion be coaxially arranged with respect to the axial direction when inserting the cylindrical ceramic body. The first guide portion and the second guide portion may be independent of each other, or the first guide portion and the second guide portion may be integrated. For example, in the manufacturing method of the heat conduction member shown in FIG. 5, the example at the time of using the jig 31 for heat conduction member manufacture 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, when the cylindrical ceramic body 11 passes through the inside of the second guide portion 33, the second guide portion 33 is made of the cylindrical ceramic body 11 with respect to one open end face of the metal pipe 12. It guides so that the position of radial direction may turn into a suitable position. For example, by dropping the cylindrical ceramic body 11 from the upper side of the metal pipe 12, positioning of the cylindrical ceramic body 11 which has passed through the second guide portion 33 is performed, and it is extremely simply possible to position in the metal pipe 12 positioned. The cylindrical ceramic body 11 can be inserted.

  In the method of manufacturing the heat conduction member of the present embodiment, as shown in FIG. 9, the metal of which 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 is preferred to match the inner diameter of the tube 12. Further, it is also preferable that the minimum inner diameter of the second tapered portion 35 of the second guide portion 33 is configured to be thermally expanded and smaller than the inner diameter of the metal pipe 12 positioned by the first guide portion 32. It is one of the modes. By configuring as described above, it is possible to secure as large a shrink-fit margin as possible, and it is possible to make the heat transfer characteristics of the obtained heat conduction member better and more stable. In addition, as shown in FIGS. 11 to 14, the second guide portion 33B has a second tapered portion in which the inner diameter of the second guide portion 33B is reduced, and the second inner diameter of the second guide portion 33B is constant. It may further have a guide straight portion. By further including such a second guide straight portion, after the posture of the cylindrical ceramic body 11 is adjusted, the orthogonality to one end face of the metal tube 12 is further improved.

  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 pipe, it is preferable that the first guide portion has low thermal expansion, low thermal conductivity, and heat resistance. Also in the case where the first guide portion and the second guide portion are integrated, it is preferable that the jig has low thermal expansion, low thermal conductivity, heat resistance, and wear resistance. As such a thing, ceramics can be mentioned, for example. When the jig described above is a ceramic, it can be a ceramic such as an oxide, a carbide, a nitride, or a graphitic carbon, and a metal matrix composite material (in other words, cermet) containing such a ceramic. Moreover, when the jig mentioned above is a metal, Ti, W, Mo, the single metal containing Fe, and an alloy can be mentioned. As an alloy, an Fe-Ni alloy, an Fe-Ni-Co alloy, low expansion cast iron, etc. can be mentioned. It is preferable to further add an element such as W, Nb, Al, C, Si, Mg, Cr, Co, Mn, Ti or Mo to these metals. In addition, it is also one of the preferable modes that a ceramic coating is applied to a part of the jig, or 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 pipe does not easily decrease when the heated metal pipe contacts the jig, which is more preferable. Specifically, extra conditions can be reduced and a simple manufacturing method can be achieved.

  Further, in the first guide portion, the heat capacity and the heat conduction of the portion in contact with the metal pipe may be partially suppressed. For example, the thickness of the first guide portion at a portion in contact with the metal pipe may be reduced, or a groove or the like may be formed in the portion. Further, the material of the portion in contact with the metal pipe may be made to have low thermal conductivity.

(1-3) Tubular 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 this range, the thermal conductivity is improved, and the heat in the cylindrical ceramic body 11 can be efficiently discharged to the outside of the metal tube 12.

  The cylindrical ceramic body 11 is preferably made of a ceramic that is excellent in heat resistance, and particularly considering heat conductivity, SiC (silicon carbide) having high thermal conductivity is preferably 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 have to be made of SiC (silicon carbide), as long as SiC (silicon carbide) is contained in the main body. That is, the cylindrical ceramic body 11 is preferably made of ceramic containing SiC (silicon carbide). As mentioned above, it is one of the preferable modes that the cylindrical ceramic body 11 is a heat conduction member which has SiC as a main component.

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

As the cylindrical ceramic body 11, Si-impregnated SiC, (Si + Al) -impregnated SiC, metal composite SiC, recrystallized SiC, Si ₃ N ₄ , reaction sintered SiC, etc. can be adopted, but high heat exchange rate is obtained. Si-impregnated SiC and (Si + Al) -impregnated SiC can be employed to provide a dense body structure for the purpose. The Si-impregnated SiC has a structure in which the solidified product of the metallic silicon melt surrounds the SiC particle surface and the SiC is integrally joined through the metallic silicon, so the silicon carbide is shielded from the atmosphere containing oxygen and prevented from oxidation Be done. Furthermore, SiC has a feature of high thermal conductivity and easily dissipates heat, 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 excellent corrosion resistance to acid, alkali, etc. In addition to exhibiting properties, they also exhibit high thermal conductivity.

  When the cylindrical ceramic body 11 is formed as a honeycomb structure 1 in which a plurality of cells 3 serving as flow paths are partitioned by the partition walls 4, the cell shape is circular, elliptical, triangular, quadrangular, hexagonal, or the like A desired shape may be appropriately selected from polygons and the like. It is one of the preferable modes that the cylindrical ceramic body 11 is a honeycomb structure in which a plurality of cells 3 are partitioned by the 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 according to the purpose, but it is in the range of 4 to 320 cells / cm ^2. preferable. When the cell density is greater than 4 cells / cm ² , the strength of the partition walls 4 and hence the strength and effective GSA (geometrical surface area) of the honeycomb structure 1 itself 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 one 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. Further, when the number of cells is small, the heat transfer area on the first fluid side becomes small, and the heat resistance on the first fluid side can not 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, 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 occupied on the side of the honeycomb structure becomes large, the pressure loss of the fluid becomes small, 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 4 is sufficient, and the partition 4 can be prevented from being damaged by pressure when the first fluid passes through the inside of the flow path. Moreover, honeycomb structure 1 itself does not become heavy too much as it is 5 g / cm < ³ > or less, and can be reduced in weight. By setting the density in the above range, the honeycomb structure 1 can be made strong. In addition, the effect of improving the thermal conductivity can also be obtained.

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

  Next, the clay is extrusion-formed to form a honeycomb formed body. In extrusion molding, the shape and thickness of the outer peripheral wall, the thickness of the partition wall, the shape of the cell, the cell density and the like can be made as desired by selecting an appropriate die or jig. Although the die is not particularly limited, it is preferable to use one made of hard-to-wear hard metal. With respect to the honeycomb formed body, the outer peripheral wall is formed in a cylindrical shape or a quadrangular prism shape, and the inside of the outer peripheral wall is formed to have a structure divided into square grids by partition walls. In addition, these partition walls are formed so as to be parallel to each other at equal intervals in each of directions orthogonal to each other and to cross the inside of the outer peripheral wall straight. Thereby, the cross-sectional shape of the cell other than the outermost periphery 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 the water corresponding to 97% or more of the total water content contained in the honeycomb formed body before drying is Remove from the compact.

  Degreasing is carried out after processing of the outer shape (outer diameter, L size) is appropriately performed on the dried honeycomb molded body, if necessary. Furthermore, a mass of metal Si is placed on the honeycomb structure obtained by such degreasing, and firing is performed in vacuum or in an inert gas under reduced pressure. During the firing, a 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 the metal Si. For example, when the thermal conductivity of the outer peripheral wall 7 and the partition walls 4 is 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. When the thermal conductivity of the outer peripheral wall 7 and the partition walls 4 is 150 W / m · K, a mass of 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 (cylindrical ceramic body 11) used in the method of manufacturing the heat conduction member of the present embodiment can be manufactured.

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

  The shape of the metal tube 12 may be any shape as long as the end of the metal tube 12 contacts the heat conduction member manufacturing jig 31 during thermal expansion. Therefore, although the metal pipe 12 may be a straight pipe, it may be a pipe other than a straight pipe and configured to change in diameter in the axial direction. For example, a metal pipe whose end is expanded or a metal pipe whose end diameter is expanded by flare processing (in other words, the end is conically expanded) is one of the preferable forms.

(1-5) Intermediate material:
In the method of manufacturing the heat conduction member of the present embodiment, the shrink fitting step may be performed in a state in which the intermediate material is sandwiched between the metal pipe and the cylindrical ceramic body. Examples of the intermediate material include a graphite sheet, a metal sheet, a gel sheet, an elasto-plastic fluid, and the like. Examples of the metal constituting the metal sheet include gold (Au), silver (Ag), copper (Cu), aluminum (Al) and the like. Elasto-plastic fluid is a material that behaves as a solid (with elastic modulus) without plastic deformation if it has a small force, and it deforms freely like a fluid when a large force is applied, and grease Etc. are mentioned as an example. It is preferable to use a graphite sheet as the intermediate material in consideration of adhesion, thermal conductivity and the like. Hereinafter, as an intermediate material, a graphite sheet will be described as an example.

  By performing the shrinking step by sandwiching the intermediate material made of the graphite sheet between the metal tube and the cylindrical ceramic body, the intermediate material made of the graphite sheet is sandwiched between the cylindrical ceramic body and the metal tube. The heat conduction member can be obtained. In such a heat conducting member, the graphite sheet can be pressurized and can transfer heat in an environment of normal temperature to 150 ° C. in use of the joint between the metal pipe and the cylindrical ceramic body.

  The graphite sheet in the present specification is a sheet obtained by rolling a graphite containing expanded graphite as a main component into a sheet, or a sheet obtained by thermal decomposition of a polymer film, and a graphite sheet, a carbon sheet Also includes 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. Further, 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, still more preferably 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 the adhesion and the 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 still more preferably 50 μm or more and 250 μm or less. Graphite sheets become more expensive the thinner they are. Moreover, when it becomes thick, it produces a thermal resistance. 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 pipe.

  When using such a graphite sheet as an intermediate material, it is preferable to wind a graphite sheet on the outer peripheral surface of the outer peripheral wall of the cylindrical ceramic body before inserting in a metal pipe. At this time, the graphite sheet may be attached to the outer peripheral surface of the outer peripheral wall of the cylindrical ceramic body using an adhesive. By using an adhesive, it is possible to stick the graphite sheet uniformly. It is desirable that the adhesive be sufficiently thin and have good heat conductivity.

(2) Heat conduction member manufacturing apparatus:
Next, one embodiment of the heat conduction member manufacturing apparatus of the present invention will be described. The heat conduction member manufacturing apparatus of the present embodiment is a heat conduction member manufacturing apparatus used in the method of manufacturing the heat conduction member of the present embodiment described above. FIG. 16 is a schematic view showing an embodiment of a heat conducting member manufacturing apparatus of the present invention.

  As shown in FIG. 16, the heat conduction member manufacturing apparatus 100 of this embodiment includes a first guide portion 32 for positioning the cylindrical metal tube 12 and a second guide portion 33 for adjusting the posture of the cylindrical ceramic body 11. Is provided. The first guide portion 32 positions one open end surface of the metal pipe 12 which is expanded in the radial direction by thermal expansion. That is, the first guide portion 32 contacts the metal pipe 12 which is expanded in the radial direction by the thermal expansion, thereby suppressing the further thermal expansion and positioning the metal pipe 12.

  In the heat conduction 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 pipe 12 positioned by the first guide portion 32. Are configured to The cylindrical ceramic body 11 is gripped by the gripping portion 38 above the metal pipe 12, and after the positioning of the metal pipe 12 is finished, the gripping by the gripping portion 38 is released and drops toward the metal pipe 12. It is preferable to be configured. 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 is inserted into the metal pipe 12 positioned by the first guide portion 32. In addition, the metal pipe 12 and the cylindrical ceramic body 11 are members for manufacturing a heat conduction member, and are not components of the heat conduction member manufacturing apparatus 100 of this embodiment.

  The first guide portion and the second guide portion may be independent of each other, or the first guide portion and the second guide portion may be integrated. In the case where the first guide portion and the second guide portion are independent of each other, the first guide portion and the second guide portion are coaxially arranged with respect to the insertion direction of the cylindrical ceramic body 11. Is preferred. The first guide portion 32 and the second guide portion 33 in the heat transfer member manufacturing apparatus 100 of the present embodiment are the same as the first guide portion and the second guide portion described in the heat transfer member manufacturing method of the present embodiment. What was comprised can be used suitably. For example, using the heat conduction member manufacturing jig 31 shown in FIG. 6 or the heat conduction member manufacturing jig 31B shown in FIG. 11 as the first guide portion 32 and the second guide portion 33 in the heat conduction member manufacturing device 100 it can.

  Further, the second guide portion is a position where the radial position of the cylindrical ceramic body is appropriate with respect to one open end face of the metal tube positioned by the cylindrical ceramic body passing through the inside of the second guide portion. It is preferable to guide so that Moreover, it is preferable that a 2nd guide part is what has a 2nd taper part to 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 pipe positioned by the first guide portion by thermal expansion. In addition, one in which the minimum inner diameter of the second tapered portion of the second guide portion is configured to be thermally expanded and smaller than the inner diameter of the metal pipe positioned by the first guide portion is one of the more preferable embodiments. It is one.

  The heat conduction member manufacturing apparatus 100 of the present embodiment further includes a receiving jig 40 for supporting the bottom side of the metal pipe 12. The receiving jig 40 is vertically movable 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 as not to be in contact with each other before heating. That is, in the state before heating, the metal pipe 12 and the first guide portion 32 do not contact, and the metal pipe 12 and the first guide portion 32 are in contact with each other by thermal expansion at the time of heating and alignment is performed. Is preferred. In the heat conduction member manufacturing apparatus 100 of the present embodiment, at least a part of the inner peripheral surface of the first guide portion 32 contacts the metal pipe 12 by thermal expansion, and one open end face of the metal pipe 12 is positioned Ru.

  Moreover, the furnace body wall 42 is arrange | positioned so that the heat conductive member manufacturing apparatus 100 of this embodiment may surround the circumference | surroundings of the metal pipe 12. As shown in FIG. The furnace body wall 42 can be, for example, one made of quartz glass. Furthermore, the heat conduction member manufacturing apparatus 100 of the present embodiment may further include a heater 41 for heating the metal pipe 12. As this heater 41, an induction heater can be mentioned. It is preferable that the heater 41 can raise the temperature of the metal pipe 12 to 1000 ° C. or more.

  Moreover, the heat conduction member manufacturing apparatus 100 of the present embodiment may further include a weight 39 for disposing on the end face of the cylindrical ceramic body facing vertically upward. The weight 39 is disposed on the end face of the cylindrical ceramic body facing vertically upward, and the cylindrical ceramic body 11 is dropped toward the metal pipe 12 together with the weight 39. As a result, 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 can be smoothly performed without any trouble. A wire (not shown) is connected to the weight 39, and after the tubular ceramic body 11 is inserted into the metal tube 12, the weight 39 can be pulled upward using this wire. Is preferred.

(3) Jig for manufacturing a heat conducting member:
Next, one embodiment of the heat conductive member manufacturing jig of the present invention will be described. The heat conductive member manufacturing jig of the present embodiment is a heat conductive member manufacturing jig that can be suitably used for the heat conductive member manufacturing method described above. That is, the heat conductive member manufacturing jig of the present embodiment is provided with the first guide portion 32 for positioning the end on one open end face side of the cylindrical metal tube as shown in FIG. The member manufacturing jig 31 can be mentioned. In the heat conducting member manufacturing jig 31, the first guide portion 32 is configured to position one open end face of the metal pipe which is expanded in the radial direction by thermal expansion. In the heat conducting member manufacturing jig 31 of the present embodiment, at least a part of the inner peripheral surface of the first guide portion 32 is in contact with the metal pipe by thermal expansion, and one open end face of the metal pipe is positioned Be done. Further, the heat conducting member manufacturing jig 31 of the present embodiment may further include the second guide portion 33 for adjusting the posture of the cylindrical ceramic body. In addition, it is preferable that the heat conductive member manufacturing jig 31 of this embodiment is comprised similarly to the heat conductive member manufacturing jig demonstrated in the manufacturing method of the heat conductive member of this embodiment.

  Further, as another embodiment of the heat conductive member manufacturing jig of the present invention, as shown in FIG. 11, a first guide portion 32B for positioning an end portion on one open end face side of a cylindrical metal pipe is used. The heat conductive member manufacturing jig 31B provided can be mentioned. The heat conducting 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, a heat exchanger using the heat conduction member manufactured by the method for manufacturing a heat conduction member of the present invention will be described. FIG. 17 is a perspective view schematically showing a heat exchanger using the heat conduction member manufactured by the embodiment of the method for manufacturing a heat conduction member according to the present invention. As shown in FIG. 17, the heat exchanger 30 is formed of a heat conducting member 10 and a casing 21 including the heat conducting member 10 therein. As described above, the heat conducting member 10 is provided with the honeycomb structure 1 as the cylindrical ceramic body 11 and the metal tube 12. The cells 3 of the honeycomb structure 1 as the cylindrical ceramic body 11 serve as the first fluid circulating unit 5 through which the first fluid flows. The heat exchanger 30 is configured to allow the first fluid, which is hotter than the second fluid, to flow in the cells 3 of the honeycomb structure 1. Further, an inlet 22 and an outlet 23 for the second fluid are formed in the casing 21, and the second fluid flows on the outer peripheral surface 12 h of the metal pipe 12 of the heat conducting member 10.

  That is, the second fluid communication portion 6 is formed by the inner side surface 24 of the casing 21 and the outer peripheral surface 12 h of the metal pipe 12. The second fluid circulation unit 6 is a circulation unit of a second fluid formed by the casing 21 and the outer circumferential surface 12 h of the metal pipe 12. The second fluid circulation unit 6 and the first fluid circulation unit 5 are separated by the partition 4 and the metal pipe 12 of the honeycomb structure 1, and can be thermally conductive by the partition 4 and the metal pipe 12. . That is, the heat exchanger 30 receives the heat of the first fluid flowing through the first fluid circulation unit 5 through the partition wall 4 and the metal pipe 12, and transfers the heat to the object to be heated which is the second fluid. It is a thing. The first fluid and the second fluid are separated in a fluid-tight and gas-tight manner, and these fluids are configured not to mix.

  The first fluid communication part 5 is formed as a honeycomb structure, and in the case of the honeycomb structure, when the fluid passes through the cell 3, the fluid can not flow into another cell 3 by the partition wall 4, and this fluid It proceeds linearly from the inlet to the outlet of the honeycomb structure 1. Moreover, in the honeycomb structure 1 in the heat exchanger 30 of the present embodiment, it is preferable that the open end of the cell 3 is not plugged. With this configuration, the heat transfer area of the fluid can be increased, and the size of the heat exchanger 30 can be reduced. Therefore, the amount of heat transfer per unit volume of the heat exchanger 30 can be increased. Furthermore, since it is not necessary to perform processing such as formation of plugged portions or formation of slits in the honeycomb structure 1, the manufacturing cost of the heat exchanger 30 can be reduced.

  The heat exchanger 30 preferably allows the first fluid, which is at a higher temperature than the second fluid, to flow and conduct heat from the first fluid to the second fluid. By flowing a gas as the first fluid and a liquid as the second fluid, heat exchange between the first fluid and the second fluid can be efficiently performed. That is, the heat exchanger 30 of this embodiment can be applied as a gas / liquid heat exchanger.

  As a heating body which is the 1st fluid made to circulate through heat exchanger 30 of the above composition, if it is a medium which has heat, gas, a liquid, etc., is not limited in particular. For example, if it is a gas, the exhaust gas of a car etc. will be mentioned. The medium to be heated, which is the second fluid that takes heat from the heating body (heat exchange), is not particularly limited as a medium, as long as the temperature is lower than that of the heating body.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Example 1 Production Example A
After extruding clay containing ceramic powder into a desired shape, it is dried and processed to a predetermined external dimension, then impregnated with Si and fired, the material is silicon carbide, the main body size is 46.7 mm, and the length is 100 mm. A cylindrical (cylindrical) honeycomb structure was produced. That is, a honeycomb structure was used as a cylindrical ceramic body. The cell density of the honeycomb structure is 23.3 cells / cm ² , the thickness (wall thickness) of the partition walls 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 the present specification, room temperature means 20 ° C.

  Next, a graphite sheet with an acrylic adhesive (product 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 approximately 0.1 GPa was used as the graphite sheet. In Example 1, although the graphite sheet with an adhesive was used, you may adhere | attach a graphite sheet using a heat conductive adhesive separately.

As a metal tube, a SUS tube (SUS 304: coefficient of thermal expansion 19.4 x 10 ^-6 / ° C between room temperature (20 ° C) and 1050 ° C) with a thickness of 0.4 mm, an inner diameter of 47.0 mm and a length of 120 mm was prepared. . The cylindricity of this metal tube was 0.3. The shrink fit Δ between this metal tube and the above honeycomb structure is 0.2 mm. Cylindricity was measured by a three-dimensional measuring device.

Next, the metal tube 12 and the honeycomb structure 1 (cylindrical ceramic body 11) were shrink-fit by a method as shown in FIG. 5 to manufacture a heat conductive member. At this time, the heat conducting member manufacturing jig 31 provided with the first guide portion 32 and the second guide portion 33 was used. The heat conducting member manufacturing jig 31 is a hollow cylindrical jig as shown in FIG. 6 and has the first guide portion 32 on the bottom surface 31y side, and the upper surface 31x side of the heat conducting member manufacturing jig 31 , Has a second guide portion 33. 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 portion 32 and the second guide portion 33, and the honeycomb structure 1 whose posture is adjusted by the second guide portion 33 passes through the connection path. The first guide portion 32 is configured to be inserted into the metal tube 12 positioned. The heat conductive member manufacturing jig has a thermal conductivity of 30 W / (m · K) at room temperature (20 ° C.), a thermal conductivity of 10 W / (m · K) at 300 ° C., between room temperature (20 ° C.) and 300 ° C. The thing whose coefficient of thermal expansions consists of an alumina of 7.2 * 10 < ^-6 > / ^degreeC was used.

  Specifically, first, the metal pipe 12 at 25 ° C. (normal temperature) was disposed on the receiving jig 40, and the receiving jig 40 was raised to move the metal pipe 12 into the first guide portion 32. The movement of the receiving jig 40 was stopped when the metal tube 12 was inserted in the first guide portion 32 in the axial direction by 0.1 mm or more. Next, the metal tube 12 was heated up to about 1000-1100 degreeC 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 on the one open end face side of the metal tube 12 is partially due to the inner peripheral surface of the first guide portion 32 Restrained. After thermal expansion is performed until the entire outer peripheral surface of the metal tube 12 abuts on the inner peripheral surface of the first guide portion 32, the honeycomb structure 1 is dropped from above the metal tube 12 with one end face facing downward . While the honeycomb structure 1 passes through the tapered second guide portion 33, its posture is adjusted, and the honeycomb structure 1 can be removed without bringing the metal tube 12 and the honeycomb structure 1 into contact with each other. The metal tube 12 was inserted. With the entire axial direction of the honeycomb structure 1 inserted in 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-fit. did. Table 1 shows “cylindricity of metal pipe” and “shrinkage Δ”.

  Moreover, it evaluated by the following evaluation criteria about the shrink fitting at the time of manufacture of a heat conductive member. An evaluation result is shown in the column of "shrinkage result" of Table 1. The evaluation criterion is that the honeycomb structure 1 can be inserted into the metal pipe 12 at the time of shrink fitting, and the honeycomb structure 1 is baked at a predetermined position in the metal pipe 12 by cooling. "Good". In addition, when the honeycomb structure 1 can not be inserted into the metal tube 12 or after being inserted into the metal tube 12, the honeycomb structure 1 does not fall to a predetermined position in the middle of the metal tube 12 in the axial direction. The case where it has stopped is considered as "defective".

(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 cylindricalness of the metal tube and the shrink fit margin Δ were changed as shown in Table 1. The change of the shrink-fit was performed by adjusting the dimensions of the external processing of the honeycomb structure. Evaluation was performed on the same evaluation criteria as in Production Example A of Example 1 with regard to shrink fitting during production of the heat conducting member. An evaluation result is shown in the column of "shrinkage result" of Table 1. 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 in the same manner as in Production Example A of Example 1. In Production Examples I to M of Comparative Example 1, when the heat conduction member is manufactured by shrink-fitting the metal tube and the honeycomb structure, a jig 31 for manufacturing the heat conduction member as shown in FIG. 6 is used. I did a shrink fit. Specifically, first, the temperature was raised to about 1000 to 1100 ° C. with an induction heater in a state where the circumference of the metal pipe was not restricted at all, and the metal pipe was thermally expanded. Next, from above the metal tube, the honeycomb structure was inserted with its one end face downward. Evaluation was performed on the same evaluation criteria as in Production Example A of Example 1 with regard to shrink fitting during production of the heat conducting member. The evaluation results for Production Examples I to M of Comparative Example 1 are shown in the column of “shrinkage result” in Table 1.

(Result 1)
In Production Examples A to H of Example 1, the contact between the end face of the metal tube and the honeycomb structure (cylindrical ceramic body) could be effectively prevented, and the shrink fit could be performed well. . In addition, even when a metal tube having poor cylindricality was used, the cylindricality of the metal tube could be improved during thermal expansion, and the honeycomb structure could be inserted easily. In addition, since the honeycomb structure is aligned by passing through the second guide portion, the highly accurate alignment of the honeycomb structure to be fed to the positioned metal tube is not necessary, which is extremely simple. The honeycomb structure could be inserted. In particular, even when the shrinkage Δ was large, the contact between the metal tube and the honeycomb structure could be suppressed.

  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 stumbling results have become bad. Thus, in Comparative Example 1 which is a conventional manufacturing method, for example, when a metal pipe having a cylindricality of 0.3 is used, the shrink fit margin Δ is 0 to 0.3. That is, in the manufacturing method of Comparative Example 1, as can be understood from the results of Manufacturing Examples I to K, the shrinkage tolerance Δ has a limit of 0.3. In the manufacturing method of Comparative Example 1, even when the shrinkage Δ is 0.3, a slight difference in the conditions of the shrinking step results in a poor shrinkage result. Is also conceivable. Further, in the manufacturing method of Comparative Example 1, when a metal pipe having a cylindricity of 0.6 was used, the result of the shrinking was poor even if the shrinkage Δ was 0.1.

  On the other hand, in the manufacturing method of Example 1, as is understood from the results of Production Examples A to E, when a metal pipe having a sphericity of 0.3 is used, the shrinkage Δ is 0 to 0. Up to 45 are possible. In addition, even when a metal pipe having a cylindricality of 0.6 is used, the shrink fit Δ can be from 0 to 0.45. In this example, the verification was performed until the maximum value of the shrink-fit margin Δ was 0.45, but in Production Examples D and H in which the shrink-fit margin Δ is 0.45, the metal pipe is very smoothly. Since it was possible to insert the honeycomb structure, it is expected that a good shrink-fit result can be obtained even when the shrink-fit Δ is 0.45 or more. As described above, in the manufacturing method of the first embodiment, even when the shrink fit margin Δ is large, the contact between the metal tube and the honeycomb structure can be suppressed, and the result of the shrink fit is a cylinder of the metal tube. It turns out that it is hard to be influenced by good and bad. For this reason, according to the manufacturing method of the first embodiment, for example, even when a relatively inexpensive metal tube having a poor roundness is used, a relatively expensive metal tube having a good roundness is used. Equivalent heat conducting members can be manufactured. In addition, even when high temperature heating is difficult due to the restriction on the material of the metal pipe, it is possible to manufacture at a low temperature and with a good shrink-fit margin Δ.

(Example 2; Production Example N)
After extruding clay containing ceramic powder into a desired shape, it is dried and processed to desired external dimensions, and then impregnated with Si and fired, the material is silicon carbide, the main body size is 55.3 mm, the length is 12 mm. A cylindrical (cylindrical) honeycomb structure was produced. That is, a honeycomb structure was used as a cylindrical ceramic body. The cell density of the honeycomb structure is 7.8 cells / cm ² , the thickness (wall thickness) of the partition walls is 0.5 mm, the thermal conductivity of the honeycomb structure is 150 W / m · K, room temperature (20 ° C.) to 800 ° C. The thermal expansion coefficient between them was 4.2 × 10 ⁻⁶ / ° C.

As a metal tube, a stainless steel tube (wallite SUS 430 J 1 L: thermal expansion coefficient 13.2 × 10 ^-6 / ° C between room temperature (20 ° C) and 1050 ° C) with a thickness of 1.0 mm, an inner diameter of 55.0 mm and a length of 40 mm Made. The cylindricity of this metal tube was 0.3. The shrink fit Δ between this metal pipe and the above honeycomb structure is 0.3 mm. Cylindricity was measured by a three-dimensional measuring device.

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

  Further, in Production Example N of Example 2, the tubular ceramic 61 is fixed by the fixing jig 51 disposed at the tip of the shaft 50, and the tubular ceramic 61 is lowered by lowering the shaft 50 at a constant speed. 61 was inserted into the metal tube 62. Specifically, first, the metal pipe 62 at 25 ° C. (normal temperature) was disposed on the receiving jig 40, and the receiving jig 40 was raised to move the metal pipe 62 into the first guide portion 32. The movement of the receiving jig 40 was stopped when the metal tube 62 was inserted in the first guide portion 32 in the axial direction by 0.1 mm or more. Next, the metal tube 62 was heated up to about 1000-1100 ° C. with an induction heater. The metal pipe 62 thermally expands due to this temperature rise, but the expansion due to the thermal expansion of the end on the one open end face side of the metal pipe 62 is partially due to the inner peripheral surface of the first guide portion 32 Restrained. As described above, the honeycomb structure 1 fixed by the fixing jig 51 disposed at the tip of the shaft 50 is disposed above the metal tube 62. After the entire outer peripheral surface of the metal tube 62 is thermally expanded until it abuts on the inner peripheral surface of the first guide portion 32, the shaft 50 to which the honeycomb structure 1 is fixed is lowered at a constant speed. While the honeycomb structure 1 passes through the tapered second guide portion 33, its posture is adjusted, and the honeycomb structure 1 is placed in the metal tube 62 without bringing the metal tube 62 and the honeycomb structure 1 into contact with each other. Inserted into With the entire axial direction of the honeycomb structure 1 inserted in 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-fit. did. Table 1 shows “cylindricity of metal pipe” and “shrinkage Δ”.

  Moreover, it evaluated by the same evaluation criteria as manufacture example A of Example 1 about the heat fitting at the time of manufacture of a heat conductive member. An evaluation result is shown in the column of "shrinkage result" of Table 1.

(Example 2; Production Examples O and P)
A heat conducting member was produced in the same manner as in Production Example N of Example 2 except that the cylindricalness of the metal tube and the shrink fit margin Δ were changed as shown in Table 1. Evaluation was performed on the same evaluation criteria as in Production Example N of Example 2 with regard to shrink fitting at the time of production of the heat conductive member. An evaluation result is shown in the column of "shrinkage result" of Table 1. 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 Production Example N of Example 2. In Production Examples Q and R of Comparative Example 2, when the heat conduction member is manufactured by shrink-fitting the metal tube and the honeycomb structure, a jig 31 for manufacturing the heat conduction member as shown in FIG. 6 is used. I did a shrink fit. Specifically, first, the temperature was raised to about 1000 to 1100 ° C. with an induction heater in a state where the circumference of the metal pipe was not restricted at all, and the metal pipe was thermally expanded. Further, a honeycomb structure fixed by a fixing jig disposed at the tip of the shaft is disposed above the metal pipe. Next, from above the metal tube, the shaft to which the honeycomb structure is fixed was lowered at a constant speed to insert the honeycomb structure with one end face facing downward. Evaluation was performed on the same evaluation criteria as in Production Example A of Example 1 with regard to shrink fitting during production of the heat conducting member. The evaluation results for Production Examples Q and R of Comparative Example 2 are shown in the column of “shrinkage result” in Table 1.

(Result 2)
In Production Examples N to P of Example 2, the contact between the end face of the metal tube and the honeycomb structure (cylindrical ceramic body) could be effectively prevented, and the shrink fit could be performed well. . In addition, since the honeycomb structure is fixed by the fixing jig disposed at the tip of the shaft and inserted into the metal tube while maintaining the horizontality of the honeycomb structure (while suppressing the inclination), it passes through the entrance of the metal tube Even after the heat treatment, 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 pipe and could not be inserted, and the result of the shrink fitting was poor. In Comparative Example 2, because the material has a small thermal expansion coefficient, as in Production Example R of Comparative Example 2, even if the shrink fit Δ is 0.11, the result of the shrink fit is poor. The

  The manufacturing method of the heat conduction member of the present invention can be used for the method of manufacturing the heat conduction member for exchanging heat between the heating body (high temperature side) and the heating body (low temperature side). The heat conducting member manufacturing apparatus and the heat conducting member manufacturing jig of the present invention can be used for the method of producing a heat conducting member of the present invention.

1: Honeycomb structure 2: End face in (axial direction) 3: Cell 4: 4: Partition wall 5: First fluid circulation part 6: 6: Second fluid circulation part 7: 7: Outer peripheral wall 7h: (cylindrical ceramics 10) 10B, 10C: heat conduction member, 11, 11B, 61: cylindrical ceramic body, 12, 12C, 62: metal tube, 12a: end of metal tube, 12h: (metal Tube) outer circumferential surface, 20: central axis, 21: casing, 22: (second fluid) inlet, 23: (second fluid) outlet, 24: inner surface (of casing), 30: heat exchange 31, 31B: heat conductive member manufacturing jig, 31x: top surface (of heat conductive member manufacturing jig) 31y: bottom surface (of heat conductive member manufacturing jig) 32, 32B: first guide portion 33, 33B: second guide part, 34: first taper part, 35: second taper part, 38: grip 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 (26)

A tubular ceramic body is inserted from one open end face of the tubular metallic pipe, and a shrink-fitting step is carried out to shrink-fit the metallic pipe and the tubular ceramic body inserted into the metallic pipe,
The second guide portion positions the metal tube and adjusts the posture of the cylindrical ceramic body by the first guide portion which positions the one open end face of the metal tube expanded in the radial direction by thermal expansion. It is a manufacturing method of the heat conduction member which adjusts the posture of the cylindrical ceramic body, and inserts the cylindrical ceramic body into the positioned metal tube,
The first guide portion and the second guide portion are coaxially arranged in the axial direction when the cylindrical ceramic body is inserted,
The first guide portion is configured such that the inner diameter thereof is larger than the outer diameter of the metal tube before thermal expansion, and the first guide portion is in the first guide portion in a state before heating of the metal tube. An end on the side of the one open end face is disposed, and
The metal pipe comes in contact with at least a part of the inner peripheral surface of the first guide portion by thermal expansion, and the inner peripheral surface of the first guide portion is an end portion on one open end face side of the metal pipe The manufacturing method of the heat conduction member which restrains the expansion by thermal expansion, and the said one opening end surface of the said metal tube is positioned.   The method according to claim 1, wherein the first guide portion has a first taper portion in which an inner diameter of the first guide portion decreases toward the second guide portion. The second guide portion is a position of the cylindrical ceramic body in the radial direction with respect to the one open end surface of the metal pipe positioned by the cylindrical ceramic body passing through the inside of the second guide portion. The method of manufacturing a heat conducting member according to claim 1 or 2 , wherein the guiding is performed so as to be at an appropriate position. The heat conduction according to any one of claims 1 to 3 , wherein the second guide portion has a second tapered portion in which the inner diameter of the second guide portion decreases toward the first guide portion. Method of manufacturing a member The minimum inner diameter of the second tapered portion of the second guide portion is thermally expanded to match the inner diameter of the metal pipe positioned by the first guide portion, or the second taper of the second guide portion The method for manufacturing a heat conducting member according to claim 4 , wherein the minimum inner diameter of the portion is configured to be thermally expanded and smaller than the inner diameter of the metal tube positioned by the first guide portion. The heat conducting member according to any one of claims 1 to 5 , wherein the cylindrical ceramic body is dropped from above vertically from one open end face of the metal pipe and inserted into the positioned metal pipe. Production method. The manufacturing method of the thermally-conductive member as described in any one of Claims 1-6 using the jig for thermally-conductive member manufacture with which the said 1st guide part and the said 2nd guide part were united. The method for manufacturing a heat conduction member according to any one of claims 1 to 7 , wherein the cylindrical ceramic body is a heat conduction member containing SiC as a main component. The method for manufacturing a heat conducting member according to any one of claims 1 to 8 , wherein the cylindrical ceramic body has a honeycomb structure in which a plurality of cells are partitioned by partition walls. The method for manufacturing a heat conducting member according to any one of claims 1 to 9 , wherein the first guide portion is made of a ceramic, a metal, or a ceramic coating. The method according to claim 10 , wherein the first guide portion is made of ceramic. The first guide portion is made of at least one material selected from the group consisting of a ceramic of at least one of oxide, carbide, nitride, and graphitic carbon, and a metal matrix composite material containing the ceramic. method for manufacturing a heat conducting member according to any one of claims 1-9 is intended. A first guide for positioning the metal pipe, a second guide for adjusting the posture of the cylindrical ceramic body, and the metal pipe by bringing the metal pipe into contact with the end on one open end face side of the cylindrical metal pipe And a heater for heating ,
The first guide portion positions the one open end surface of the metal pipe which is expanded in the radial direction by thermal expansion,
The cylindrical ceramic body whose posture is adjusted by the second guide portion is inserted from the one open end face of the metal pipe positioned by the first guide portion, and is inserted into the metal tube and the metal tube. A heat conducting member manufacturing apparatus in which the sealed cylindrical ceramic body is shrink-fitted,
The first guide portion and the second guide portion are coaxially arranged in the axial direction when the cylindrical ceramic body is inserted,
The first guide portion is configured such that the inner diameter is larger than the outer diameter of the metal tube before thermal expansion, and the first guide portion is configured to have the metal tube in a state before heating. An end on the side of the one open end face is disposed, and
Said first guide portion, the metal tube end portion of one opening end face of said metal pipe by at least a portion in contact with the inner peripheral surface of the inner peripheral surface of the first guide portion by thermal expansion by constraining the expansion due to thermal expansion, the one opening end surface of the metal tube to be positioned, heat-conducting member manufacturing apparatus. The heat conducting member manufacturing apparatus according to claim 13 , 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 a position of the cylindrical ceramic body in the radial direction with respect to the one open end surface of the metal pipe positioned by the cylindrical ceramic body passing through the inside of the second guide portion. The heat conducting member manufacturing apparatus according to claim 13 or 14 , wherein the guide is provided to be in a proper position. The heat conduction according to any one of claims 13 to 15 , wherein 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. Member manufacturing device. The minimum inner diameter of the second tapered portion of the second guide portion is thermally expanded to match the inner diameter of the metal pipe positioned by the first guide portion, or the second taper of the second guide portion The heat conduction member manufacturing apparatus according to claim 16 , wherein the minimum inner diameter of the portion is configured to be thermally expanded and smaller than the inner diameter of the metal pipe positioned by the first guide portion. The metal tube is further provided with a grip portion for gripping the cylindrical ceramic body vertically above one open end face of the metal pipe, and the cylindrical ceramic body is released by releasing the grip by the grip portion. The heat conduction member manufacturing apparatus according to any one of claims 13 to 17 , which is configured to be dropped toward. The heat transfer member manufacturing apparatus according to any one of claims 13 to 18 , wherein the first guide portion and the second guide portion are formed of one heat transfer member manufacturing jig. The heat conducting member manufacturing apparatus according to any one of claims 13 to 19 , wherein the first guide portion is made of a ceramic, a metal, or a ceramic coating. 21. The heat conducting member manufacturing apparatus according to claim 20 , wherein the first guide portion is made of ceramic. The first guide portion is made of at least one material selected from the group consisting of a ceramic of at least one of oxide, carbide, nitride, and graphitic carbon, and a metal matrix composite material containing the ceramic. The heat conducting member manufacturing apparatus according to any one of claims 13 to 21 , wherein The heat conducting member manufacturing apparatus according to any one of claims 13 to 22, wherein the heating means of the heater is induction heating. A jig for manufacturing a heat conduction member, which is used in the heat conduction member manufacturing apparatus according to any one of claims 13 to 23 , wherein
The first guide portion for positioning the end portion on one open end face side of a cylindrical metal pipe, the first guide portion being the one opening of the metal pipe radially expanded by thermal expansion A jig for manufacturing a heat conducting member, which positions an end face. The jig for manufacturing a heat conducting member according to claim 24 , further comprising a second guide portion for adjusting the posture of the cylindrical ceramic body. The jig for manufacturing a heat conducting member according to claim 25 , wherein the first guide portion and the second guide portion are coaxially arranged.

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