Method and apparatus for manufacturing a heat-press-fit component

Abstract

Provided are a method for manufacturing a press-fit component and a manufacturing apparatus, which can easily and stably arrange a hollow cylindrical ceramic body in a prescribed position within a metal pipe to manufacture a press-fit component with high productivity and quality at low cost. A hollow cylindrical ceramic body (10) is arranged within a metal pipe to perform press fitting, and the hollow cylindrical ceramic body (10) has an outer peripheral surface (11) and an inner peripheral surface (12) in a direction substantially parallel to an axial direction (X) and a first end surface (13) and a second end surface (14) in a direction (Y) substantially perpendicular to the axial direction (X). The hollow cylindrical ceramic body (10) is arranged within the metal pipe while being held by a chuck mechanism (30), and the chuck mechanism (30) has a holding portion (31) capable of holding at least a portion of the inner peripheral surface (12) of the hollow cylindrical ceramic body (10) and a protruding portion (32) having a surface capable of contacting at least a portion of the first end surface (13) of the hollow cylindrical ceramic body (10).

Description

TECHNICAL FIELD

[0001] The present application relates to a method of manufacturing a press-fit member and a manufacturing apparatus. BACKGROUND

[0002] Heat exchangers are required to have properties such as corrosion resistance, and therefore ceramic heat exchangers are used. Heat exchangers are used for heating, cooling, and condensing various fluids including acids (bromic acid, sulfuric acid, hydrofluoric acid, nitric acid, hydrochloric acid, etc.), bases (caustic soda, etc.), halides, salt water, organic compounds, etc. in the chemical industry, pharmaceutical industry, etc. In addition, heat exchangers are also used in systems for preheating coolant water, engine oil, automatic transmission fluid (ATF), etc. at the time of engine start to reduce friction loss, and systems for heating a catalyst to activate the catalyst in advance.

[0003] As a ceramic heat exchanger, there is a heat exchanger having a structure in which a columnar ceramic body is housed in a metal pipe. The heat exchanger having this structure has the advantage that even if the columnar ceramic body is broken inside, the fluids do not mix with each other.

[0004] As a method of housing a columnar ceramic body in a metal pipe, a press-fit method is known in which the metal pipe is heated, and the columnar ceramic body is inserted into a prescribed position in the metal pipe and then cooled (for example, Patent Literature 1). The device used in this method has a straight motion mechanism that inserts the columnar ceramic body into the prescribed position in the metal pipe, and the tip end portion of the straight motion mechanism and the columnar ceramic body are fixed by a kenzan jig, an adhesive, a double-sided tape, etc.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent No. 6510283 SUMMARY

[0008] However, the fixing method using the kenzan jig is limited to the case where the columnar ceramic body is a honeycomb structure. In addition, since the honeycomb structure is fixed by the kenzan being inserted into the cells of the honeycomb structure, it is necessary to change the shape and size of the kenzan according to the shape and size of the cells, and it is also difficult to adjust the force when the kenzan is inserted into the cells of the honeycomb structure.

[0009] In addition, the fixing method using the double-sided tape or the adhesive has the following problem: since the adhesive force easily decreases due to the heat of the heated metal pipe, the columnar ceramic body is sometimes press-fitted in an inclined state. In addition, since the adhesive force of the double-sided tape or the adhesive easily decreases, the frequency of use of the double-sided tape or the adhesive also increases.

[0010] The present application has been achieved in order to solve the problems as described above, and provides a method of manufacturing a press-fit member and a manufacturing apparatus, which can easily and stably arrange a hollow cylindrical ceramic body in a prescribed position within a metal pipe, and manufacture a press-fit member with high productivity and quality at low cost.

[0011] The above problems are solved by the present application as follows.

[0012] The present application is a method of manufacturing a press-fit member by arranging a hollow cylindrical ceramic body in a metal pipe, the hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction, and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, wherein

[0013] The cylindrical ceramic body is arranged in the metal pipe while being held by a chuck mechanism having a holding portion capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body, and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body.

[0014] In addition, the present application is a manufacturing apparatus of a press-fit member by arranging a hollow cylindrical ceramic body in a metal pipe, the hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction, and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, wherein

[0015] The manufacturing apparatus has:

[0016] an arm capable of being driven in the axial direction of the metal pipe;

[0017] a chuck mechanism having a holding portion provided at a front end of the arm, capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body, and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body; and

[0018] a heating mechanism that heats the metal pipe.

[0019] Effects of the Invention

[0020] According to the present application, a method of manufacturing a press-fit member and a manufacturing apparatus can be provided, which can easily and stably arrange a hollow cylindrical ceramic body in a prescribed position within a metal pipe, and manufacture a press-fit member with high productivity and quality at low cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1is a perspective view of a hollow cylindrical ceramic body.

[0022] Figure 2 is a cross-sectional view of a honeycomb structure perpendicular to the axis.

[0023] Figure 3 is a plan view for explaining a chuck mechanism.

[0024] Figure 4 is Figure 3 is a cross-sectional view of the a-a' line.

[0025] Figure 5 is a plan view for explaining a chuck mechanism.

[0026] Figure 6 is a plan view for explaining another chuck mechanism.

[0027] Figure 7 is a cross-sectional view for explaining a chuck mechanism provided with a protruding portion having a suction mechanism.

[0028] Figure 8 is a cross-sectional view for explaining a chuck mechanism provided with a protruding portion composed of a magnetic material.

[0029] Symbol explanation

[0030] 10 hollow cylindrical ceramic body, 11 outer peripheral surface, 12 inner peripheral surface, 13 first end surface, 14 second end surface, 20 honeycomb structure, 21 outer peripheral wall, 22 inner peripheral wall, 23 cell, 24 partition wall, 30 chuck mechanism, 31 holding portion, 32 protruding portion, 40, 50 auxiliary member DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present application will be specifically described, as necessary, with reference to the accompanying drawings. The present application is not limited to the following embodiments, and it should be understood that embodiments obtained by appropriately modifying, improving, and the like of the following embodiments based on common knowledge of those skilled in the art within a scope not departing from the gist of the present application also fall within the scope of the present application.

[0032] (1) Manufacturing method of shrink-fitted member

[0033] The manufacturing method of the shrink-fitted member of the embodiments of the present application is performed by performing shrink fitting by disposing a hollow cylindrical ceramic body (hereinafter sometimes simply referred to as "cylindrical ceramic body") in a metal pipe. The manufacturing method is characterized in that the cylindrical ceramic body is disposed in the metal pipe while being held by a chuck mechanism. Except for this feature, it can be performed according to methods known in the technical field.

[0034] First, the metal pipe and the hollow cylindrical ceramic body used in the manufacturing method will be described.

[0035] <metal pipe>

[0036] As the metal pipe, there is no particular limitation, and a metal pipe having heat resistance and corrosion resistance is preferable. As examples of the metal pipe, a stainless steel pipe, a copper pipe, a brass pipe, a titanium pipe, a Ni alloy pipe, an Al alloy pipe, and the like can be given. In addition, as the metal pipe, a joint pipe obtained by joining two or more of the various pipes exemplified above can also be used.

[0037] Note that, in the case where the heat press-fitting member is used for a heat exchanger, the metal pipe is preferably one that does not cause the metal pipe to fall off from the columnar ceramic body due to a difference in thermal expansion rate between the columnar ceramic body and the metal pipe at the time of heat exchange.

[0038] As the shape of the metal pipe, there is no particular limitation as long as it is a shape that allows the columnar ceramic body to be inserted into the metal pipe, and various shapes such as a cylindrical shape, a square cylindrical shape, and the like can be given. In addition, the metal pipe can be a straight pipe having a uniform diameter in the axial direction, or can be a pipe other than a straight pipe. The pipe other than a straight pipe is one configured such that the diameter size changes along the axial direction, and for example, a pipe having a tapered portion, a reduced diameter, and / or an enlarged diameter can be given.

[0039] <columnar ceramic body of hollow type>

[0040] The columnar ceramic body of hollow type is formed in a columnar shape by ceramics, and has a hollow portion in the central portion in a cross section perpendicular to the axial direction. The columnar shape is not limited to a cylindrical shape, and can be a columnar shape having an elliptical shape, an oval shape in which a circular arc is combined, a quadrangular shape, or another polygonal shape in a cross section perpendicular to the axial direction (direction in which the flow path extends).

[0041] Here, a perspective view of the columnar ceramic body of hollow type is shown in Figure 1 . As shown in Figure 1 , the columnar ceramic body of hollow type 10 has an outer peripheral surface 11 and an inner peripheral surface 12 in a direction substantially parallel to the axial direction X, and has a first end surface 13 and a second end surface 14 in a direction Y substantially perpendicular to the axial direction X.

[0042] Note that, in the present specification, "substantially parallel" means a state within ±10°, preferably within 5°, with respect to the parallel direction. In addition, "substantially perpendicular" means a state within ±10°, preferably within 5°, with respect to the perpendicular direction.

[0043] The thermal conductivity of the hollow columnar ceramic body 10 is preferably 50 W / (m·K) or higher at 25°C, more preferably 100 to 300 W / (m·K), and even more preferably 120 to 300 W / (m·K). By making the thermal conductivity of the hollow columnar ceramic body 10 within this range, the thermal conductivity is good, enabling efficient transfer of heat from the interior of the hollow columnar ceramic body 10 to the exterior. It should be noted that the thermal conductivity value is measured by laser flash method (JIS R1611-1997).

[0044] The hollow columnar ceramic body 10 has ceramic as its main component. "Having ceramic as its main component" means that ceramic accounts for more than 50% of the total mass.

[0045] The hollow columnar ceramic body 10 preferably contains SiC (silicon carbide), which has high thermal conductivity, as its main component. "Containing SiC (silicon carbide) as the main component" means that the mass percentage of SiC (silicon carbide) in the total mass is 50% or more.

[0046] Specifically, the hollow columnar ceramic body 10 can be made of Si-SiC materials such as Si-impregnated SiC and (Si+Al)-impregnated SiC, metal composite SiC, recrystallized SiC, Si3N4, and SiC. Among these, Si-SiC materials are preferred because they can be manufactured inexpensively and have high thermal conductivity.

[0047] The hollow columnar ceramic body 10 is preferably a honeycomb structure.

[0048] Here, a typical cross-section of a honeycomb structure perpendicular to the X-axis is illustrated. Figure 2 . Figure 2 The honeycomb structure 20 shown has an outer peripheral wall 21, an inner peripheral wall 22, and a spacer wall 24 disposed between the outer peripheral wall 21 and the inner peripheral wall 22, the spacer wall 24 dividing the spacer wall into a plurality of compartments 23 extending from a first end face to a second end face. The honeycomb structure 20, with its spacer wall 24, is able to efficiently concentrate heat from the fluid flowing in the compartments 23 and transfer it to the outside.

[0049] It should be noted that the shape of the compartment 23 in the cross section perpendicular to the X-axis of the honeycomb structure 20 is not limited to the shape shown in the figure, and can also be a circle, ellipse, triangle or other polygons.

[0050] The cell density (i.e., the number of cells 23 per unit area) in the cross section perpendicular to the axial direction of the honeycomb structure 20 is not particularly limited and can be adjusted appropriately according to the application, etc., preferably 4 to 320 cells / cm². 2 The range. By making the compartment density 4 compartments / cm². 2The above allows sufficient securing of the strength of the partition wall 24, the strength of the honeycomb structure 20 itself, and effective GSA (geometric surface area). In addition, by making the cell density 320 cells / cm 2 The following allows preventing an increase in pressure loss at the time of fluid flow.

[0051] The thickness of the partition wall 24 of the honeycomb structure 20 is not particularly limited and can be appropriately designed according to the purpose. The thickness of the partition wall 24 is preferably 50 μm to 2 mm, more preferably 60 μm to 600 μm. If the thickness of the partition wall 24 is 50 μm or more, the mechanical strength is improved, and breakage due to impact or thermal stress can be prevented. On the other hand, if the thickness of the partition wall 24 is 2 mm or less, the proportion of the cell volume in the honeycomb structure 20 becomes large, the pressure loss of the fluid becomes small, and the heat exchange rate can be improved.

[0052] The thickness of the outer peripheral wall 21 and the inner peripheral wall 22 of the honeycomb structure 20 is not particularly limited and can be appropriately designed according to the purpose. In the case where the heat press-fitting member is used for a general heat transfer purpose, the thickness of the outer peripheral wall 21 and the inner peripheral wall 22 is preferably more than 0.3 mm and 10 mm or less, more preferably 0.5 mm to 5 mm, and further preferably 1 mm to 3 mm. In the case where the heat press-fitting member is used for a heat storage purpose, it is also preferable to make the thickness of the outer peripheral wall 21 10 mm or more so as to increase the heat capacity of the outer peripheral wall 21.

[0053] The porosity of the outer peripheral wall 21, the inner peripheral wall 22, and the partition wall 24 is preferably 10% or less, more preferably 5% or less, and further preferably 3% or less. In addition, the porosity of the outer peripheral wall 21, the inner peripheral wall 22, and the partition wall 24 can be 0%. By making the porosity of the outer peripheral wall 21, the inner peripheral wall 22, and the partition wall 24 10% or less, the heat transfer rate can be improved.

[0054] The isostatic compressive strength of the honeycomb structure 20 is preferably more than 100 MPa, more preferably 150 MPa or more, and further preferably 200 MPa or more. If the isostatic compressive strength of the honeycomb structure 20 is more than 100 MPa, the durability of the honeycomb structure 20 is excellent. The isostatic compressive strength of the honeycomb structure 20 can be measured based on the measurement method of the isostatic compressive failure strength prescribed in the Japanese Automobile Standard, that is, JASO Standard M505-87, issued by the Automotive Technology Council.

[0055] The hollow columnar ceramic body 10 can be manufactured by a method known in the technical field. The specific manufacturing method of the hollow columnar ceramic body 10 will be described taking the manufacturing method of the honeycomb structure 20 as an example.

[0056] First, a green compact containing ceramic powder is extrusion-molded into a desired shape to produce a honeycomb molded body. At this time, by selecting an appropriate die and jig, the shape and density of the cells 23, the number, length, and thickness of the partition walls 24, the shape and thickness of the outer peripheral wall 21 and the inner peripheral wall 22, and the like can be controlled. In addition, as the material of the honeycomb molded body, the above-described ceramic can be used. For example, in the production of a honeycomb molded body in which a Si-impregnated SiC composite material is the main component, a binder and water or an organic solvent are added to a prescribed amount of SiC powder, and the resulting mixture is kneaded to produce a green compact, and molding is performed, whereby a honeycomb molded body of a desired shape can be obtained. Then, the obtained honeycomb molded body is dried, and firing is performed in a non-reactive gas or vacuum under reduced pressure, and metal Si is impregnated in the honeycomb molded body, whereby a honeycomb structure 20 can be obtained.

[0057] The production method of the shrink-fit member of the embodiment of the present application is performed using the above-described metal pipe and the hollow cylindrical ceramic body 10. Specifically, the production method is performed by heating the metal pipe, disposing the hollow cylindrical ceramic body 10 in the heated metal pipe, and performing shrink fitting.

[0058] The heating of the metal pipe is performed by heating using a heating unit after the metal pipe is disposed inside the heating unit. As the heating unit, as long as the metal pipe can be heated from the outer peripheral side of the metal pipe, there is no particular limitation, and a heater, an induction heating device, or the like can be used.

[0059] A protruding jig can also be provided at the bottom of the position where the metal pipe is disposed. The protruding jig is a jig having a function of determining the position of the hollow cylindrical ceramic body 10 in the metal pipe in addition to determining the disposed position of the metal pipe. Therefore, the protruding jig has a structure for obtaining this function. For example, the protruding jig has a width (horizontal direction length) smaller than the pipe inner diameter of one end portion of the metal pipe so as to be able to cover one end portion side of the metal pipe. In addition, in order to be able to dispose the hollow cylindrical ceramic body 10 at a prescribed position in the metal pipe, a height (vertical direction length) corresponding to the prescribed position is provided. Further, in order to be able to remove the shrink-fit member after the shrink-fit process, a width (horizontal direction length) smaller than the diameter of the hollow cylindrical ceramic body 10 is provided. Note that, in the case where the metal pipe is not a cylindrical shape (for example, in the case of a square tube), the pipe inner diameter of one end portion of the metal pipe refers to the diameter of the largest inscribed circle that contacts the inner peripheral portion of one end portion of the metal pipe.

[0060] The shape of the protruding clamp can be appropriately set according to the shape of the metal tube. For example, when the metal tube is cylindrical, the shape of the protruding clamp can be various shapes such as cylindrical or prismatic, but cylindrical is preferred. Similarly, when the metal tube is square, the shape of the protruding clamp can be various shapes such as cylindrical or prismatic, but prismatic is preferred.

[0061] The protruding clamp may have a protrusion that can be inserted into the hollow portion of the hollow cylindrical ceramic body 10. By using the protruding clamp with the protrusion, the positioning accuracy of the hollow cylindrical ceramic body is improved during the process of assembling the cylindrical ceramic body.

[0062] The material used for the protruding clamp can be any material capable of withstanding the heating temperature during the hot pressing process; there are no particular limitations. Examples of such materials include alumina.

[0063] Next, the hollow columnar ceramic body 10 is held in place by a chuck mechanism and positioned within the heated metal tube at a predetermined location.

[0064] Here, in Figure 3 The diagram shows a top view illustrating the chuck mechanism. Figure 4 The cross-sectional view is shown in the figure. It should be noted that... Figure 4 yes Figure 3 A cross-sectional view of line a-a'.

[0065] like Figure 3 and Figure 4 As shown, the chuck mechanism 30 has a holding part 31 and a protrusion 32.

[0066] The holding portion 31 is configured to hold at least a portion of the inner peripheral surface 12 of the hollow columnar ceramic body 10. Additionally, the protrusion 32 has a surface (e.g., a plane) capable of contacting at least a portion of the first end face 13 of the hollow columnar ceramic body 10. By using the chuck mechanism 30 with this structure of holding portion 31 and protrusion 32 to hold the hollow columnar ceramic body 10, it is possible to easily and stably position the hollow columnar ceramic body 10 within a predetermined position in a metal tube. Therefore, it is possible to manufacture high-quality, high-volume hot-pressed components at low cost.

[0067] The material of the chuck mechanism 30 (holding part 31 and protrusion 32) can be made of any material that can withstand the heating temperature during the hot pressing process, and there are no special limitations.

[0068] The chuck mechanism 30 opens the 2 gripping portions 31 (i.e., moves the 2 gripping portions 31 in the direction Y in a manner so as to come into contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10), thereby being able to grip the hollow cylindrical ceramic body 10. In contrast, the chuck mechanism 30 closes the 2 gripping portions 31 (i.e., moves the 2 gripping portions 31 in the direction Y in a manner so as not to come into contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10), thereby being able to release the hollow cylindrical ceramic body 10 from the 2 gripping portions 31.

[0069] The gripping portion 31 can be configured to be capable of coming into line contact and / or surface contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10. By so coming into contact, it is possible to stably grip the hollow cylindrical ceramic body 10 with the gripping portion 31.

[0070] Here, Figure 3 and Figure 4 are examples of a case in which the gripping portion 31 comes into line contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10.

[0071] In addition, Figure 5 and Figure 6 are examples in which the gripping portion 31 comes into surface contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10. Figure 5 and Figure 6 correspond to the same plan view as Figure 3 . The surface of the gripping portion 31 that comes into surface contact with the inner peripheral surface 12 of the hollow cylindrical ceramic body 10 can have the same curved surface as the curved surface of the inner peripheral surface 12 of the hollow cylindrical ceramic body 10.

[0072] Note that, although not shown, the gripping portion 31 and the inner peripheral surface 12 of the hollow cylindrical ceramic body 10 can also come into contact in both line contact and surface contact.

[0073] The number of sites of line contact is preferably 2 or more. By so making the number of sites of line contact 2 or more, it is possible to stably grip the hollow cylindrical ceramic body 10 with the gripping portion 31.

[0074] Here, Figure 3 and Figure 4 are examples of a case in which the number of sites of line contact is 4. By changing the number and shape of the gripping portion 31, it is possible to change the number of sites of line contact.

[0075] The number of sites of surface contact is preferably 2 or more. By so making the number of sites of surface contact 2 or more, it is possible to stably grip the hollow cylindrical ceramic body 10 with the gripping portion 31.

[0076] Here, Figure 5 is an example of a case in which the number of sites of surface contact is 2, Figure 6is an example of a case where the number of sites of surface contact is three. By changing the number and shape of the holding portions 31, the number of sites of surface contact can be changed.

[0077] It is preferable that the angle formed by the holding portion 31 and the protruding portion 32 and the angle formed by the inner peripheral surface 12 and the first end surface 13 of the hollow cylindrical ceramic body 10 be substantially the same. By controlling the angle formed by the holding portion 31 and the protruding portion 32 in this way, a gap does not occur between the protruding portion 32 and the first end surface 13, and thus the hollow cylindrical ceramic body 10 can be inhibited from being held in an inclined state.

[0078] Here, in the present specification, "substantially the same" means that the difference between the angle formed by the holding portion 31 and the protruding portion 32 and the angle formed by the inner peripheral surface 12 and the first end surface 13 of the hollow cylindrical ceramic body 10 is within ±1°.

[0079] The protruding portion 32 can have an adsorption mechanism.

[0080] Here, Figure 7 A cross-sectional view for explaining a state in which the hollow cylindrical ceramic body 10 is held using the chuck mechanism 30 provided with the protruding portion 32 having an adsorption mechanism is shown. Figure 7 The cross section corresponds to the same cross section as the a-a' line of Figure 3

[0081] As shown in Figure 7 , the protruding portion 32 has an adsorption mechanism (not shown), and the auxiliary member 40 is disposed at the second end surface 14 opposite the first end surface 13 of the hollow cylindrical ceramic body 10 that contacts the protruding portion 32, and the hollow cylindrical ceramic body 10 can be held assistively using the adsorption force of the protruding portion 32. By using the adsorption mechanism of the protruding portion 32 in this way, the hollow cylindrical ceramic body 10 can be held more stably.

[0082] The protruding portion 32 can be composed of a magnetic material.

[0083] Here, Figure 8 A cross-sectional view for explaining a state in which the hollow cylindrical ceramic body 10 is held using the chuck mechanism 30 provided with the protruding portion 32 composed of a magnetic material is shown. Figure 8 The cross section corresponds to the same cross section as the a-a' line of Figure 3

[0084] As shown in Figure 8 ​​As shown, the protruding portion 32 is made of a magnetic material, and the auxiliary member 50 made of a magnetic material is disposed on the second end surface 14 opposite to the first end surface 13 of the hollow cylindrical ceramic body 10 in contact with the protruding portion 32. By using the magnetic force between the protruding portion 32 and the auxiliary member 50, the hollow cylindrical ceramic body 10 can be held assistively. By using the magnetic force between the protruding portion 32 and the auxiliary member 50 in this way, the hollow cylindrical ceramic body 10 can be held more stably.

[0085] Although not shown, the chuck mechanism 30 is connected to the front end of an arm that can be driven in the axial direction X of the metal pipe. In addition, although not shown, the arm is connected to a driving mechanism. There is no particular limitation on the arm and the driving mechanism, and a publicly known arm and driving mechanism can be used.

[0086] After the hollow cylindrical ceramic body 10 is disposed at a prescribed position inside the metal pipe after heating, the metal pipe is cooled, whereby the metal pipe is shrunk in diameter, and thus the metal pipe is heat-fitted to the hollow cylindrical ceramic body 10.

[0087] The heat-fitted member obtained as described above has the metal pipe and the hollow cylindrical ceramic body 10 housed inside the metal pipe. The heat-fitted member having such a structure can be used for various applications requiring corrosion resistance, thermal conductivity, and the like. Among others, the heat-fitted member is suitable for use as a heat-conducting member used for a heat exchanger.

[0088] (2) Manufacturing apparatus of heat-fitted member

[0089] The manufacturing apparatus of the heat-fitted member of the embodiment of the present application is applied to the manufacturing method of the heat-fitted member described above, and is an apparatus that disposes the hollow cylindrical ceramic body 10 inside the metal pipe and performs heat-fitting.

[0090] The manufacturing apparatus has: an arm that can be driven in the axial direction of the metal pipe; a chuck mechanism 30 that has a holding portion 31 provided at the front end of the arm and capable of holding at least a portion of the inner peripheral surface 12 of the hollow cylindrical ceramic body 10, and a protruding portion 32 having a surface (e.g., a flat surface) capable of contacting at least a portion of the first end surface 13 of the hollow cylindrical ceramic body 10; and a heating mechanism that heats the metal pipe. By being the manufacturing apparatus having such a configuration, the hollow cylindrical ceramic body 10 can be easily and stably disposed at a prescribed position inside the metal pipe, and a heat-fitted member with high production rate and quality can be manufactured at low cost.

[0091] Note that since the configuration of each component constituting the manufacturing apparatus is described in the manufacturing method of the heat-fitted member, the description is omitted.

Claims

1. A manufacturing method of a shrink fit member, the manufacturing method performing shrink fitting of a hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, in a metal pipe, wherein the cylindrical ceramic body is arranged in the metal pipe while being held by a chuck mechanism having a holding portion capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body, and the protruding portion has a suction mechanism, and an auxiliary member is arranged at the second end surface opposite to the first end surface of the cylindrical ceramic body contacted by the protruding portion, and the cylindrical ceramic body is held by the suction force of the protruding portion.

2. A manufacturing method of a shrink fit member, the manufacturing method performing shrink fitting of a hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, in a metal pipe, wherein the cylindrical ceramic body is arranged in the metal pipe while being held by a chuck mechanism having a holding portion capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body, and the protruding portion is composed of a magnetic material, and an auxiliary member composed of a magnetic material is arranged at the second end surface opposite to the first end surface of the cylindrical ceramic body contacted by the protruding portion, and the cylindrical ceramic body is held by the magnetic force between the protruding portion and the auxiliary member.

3. The manufacturing method according to claim 1 or 2, wherein the holding portion is configured to be capable of linear contact and / or surface contact with the inner peripheral surface of the cylindrical ceramic body.

4. The manufacturing method according to claim 3, wherein the linear contact is at two or more positions.

5. The manufacturing method according to claim 3, wherein the surface contact is at two or more positions.

6. The manufacturing method according to any one of claims 1 to 5, wherein an angle formed by the holding portion and the protruding portion is substantially the same as an angle formed by the inner peripheral surface and the first end surface of the cylindrical ceramic body.

7. The manufacturing method according to any one of claims 1 to 6, wherein the cylindrical ceramic body is a honeycomb structure body having an outer peripheral wall, an inner peripheral wall, and a partition wall disposed between the outer peripheral wall and the inner peripheral wall, the partition wall dividing a plurality of cells extending from the first end surface to the second end surface.

8. The manufacturing method according to any one of claims 1 to 7, wherein the shrink fit member is a heat transfer member. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 9. A manufacturing apparatus of a shrink fit member, which performs shrink fitting by arranging a hollow cylindrical ceramic body in a metal pipe, the hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction, and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, wherein the manufacturing apparatus comprises: an arm which is drivable in the axial direction of the metal pipe; a chuck mechanism which comprises a holding portion provided at a front end of the arm and capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body, and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body; and a heating mechanism which heats the metal pipe, wherein the protruding portion has a suction mechanism, and an auxiliary member is arranged at the second end surface opposite to the first end surface of the cylindrical ceramic body contacted by the protruding portion, and the cylindrical ceramic body is held by the suction force of the protruding portion.

10. A manufacturing apparatus of a shrink fit member, which performs shrink fitting by arranging a hollow cylindrical ceramic body in a metal pipe, the hollow cylindrical ceramic body having an outer peripheral surface and an inner peripheral surface in a direction substantially parallel to an axial direction, and having a first end surface and a second end surface in a direction substantially perpendicular to the axial direction, wherein the manufacturing apparatus comprises: an arm which is drivable in the axial direction of the metal pipe; a chuck mechanism which comprises a holding portion provided at a front end of the arm and capable of holding at least a portion of the inner peripheral surface of the cylindrical ceramic body, and a protruding portion having a surface capable of contacting at least a portion of the first end surface of the cylindrical ceramic body; and a heating mechanism which heats the metal pipe, wherein the protruding portion is composed of a magnetic material, and an auxiliary member composed of a magnetic material is arranged at the second end surface opposite to the first end surface of the cylindrical ceramic body contacted by the protruding portion, and the cylindrical ceramic body is held by the magnetic force between the protruding portion and the auxiliary member.

11. The manufacturing apparatus according to claim 9 or 10, wherein the holding portion is configured to be capable of linear contact and / or surface contact with the inner peripheral surface of the cylindrical ceramic body.

12. The manufacturing apparatus according to claim 11, wherein the linear contact is made at two or more positions.

13. The manufacturing apparatus according to claim 11, wherein the surface contact is made at two or more positions.

14. The manufacturing apparatus according to any one of claims 9 to 13, wherein an angle formed by the holding portion and the protruding portion is substantially the same as an angle formed by the inner peripheral surface and the first end surface of the cylindrical ceramic body. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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