Method for producing stack

Abstract

Provided are an upper sole or a lower sole, a sliding bearing, and a method for producing the upper sole or the lower sole, which are capable of improving durability. 【Solution means】The sole 30 is an upper sole 30 or a lower sole provided in a sliding bearing 100 disposed between an upper structure U and a lower structure L facing the upper structure U. The upper sole 30 or the lower sole includes a plate-like member 300 and a sliding surface S2 on the plate-like member 300, and there is no gap between the sliding surface S2 and the plate-like member 300.

Description

Technical Field

[0001] The present disclosure relates to Pad a manufacturing method thereof.

Background Art

[0002] In order to suppress the propagation of vibrations caused by an earthquake to a building, a sliding seismic isolation device may be used (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a sliding bearing, it is desired to improve the durability of the sliding surface.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide Pad a manufacturing method capable of improving durability.

Means for Solving the Problems

[0006] <1>The Method for manufacturing a pad according to Aspect 1 of the present disclosure includes a sliding bearing disposed between an upper structure and a lower structure facing the upper structure. A method for manufacturing a pad, the pad comprising a plate-shaped member and a sliding surface on the plate-shaped member, the method including a spraying step of spraying a metal powder of a sliding surface material onto a sliding surface formation position of the plate-shaped member, and a heating step of heating the metal powder.

Effects of the Invention

[0007] According to the present disclosure, it is possible to provide Pad a manufacturing method capable of improving durability.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0009] Hereinafter, with reference to the drawings, an upper shoe according to an embodiment of the present disclosure will be described. The upper shoe 30 according to the present embodiment is provided on the sliding bearing 100. Hereinafter, first, the sliding bearing 100 will be described.

[0010] (Regarding the sliding bearing 100) FIG. 1 is a cross-sectional view showing the configuration of the sliding bearing 100 according to the present embodiment. The sliding bearing 100 shown in FIG. 1 is disposed between an upper structure U, which is a building such as a high-rise building or a bridge, and a lower structure L, which is a foundation structure installed on the ground. The upper structure U and the lower structure L are vertically opposed to each other with their horizontal positions overlapped. The sliding bearing 100 suppresses the transmission of the shaking on the lower structure L side to the upper structure U when an earthquake occurs at the installation location of the upper structure U. The sliding bearing 100 shown in FIG. 1 is a spherical sliding bearing and includes a spherical seat portion 10, a slider 20, a shoe 30, and a friction material F.

[0011] The spherical seat portion 10 is disposed on the upper portion of the lower structure L. The spherical seat portion 10 is fixed to the upper portion of the lower structure L. The spherical seat portion 10 includes a first sliding surface S1. The first sliding surface S1 is provided on the upper portion of the spherical seat portion 10. The first sliding surface S1 is a concave spherical shape that is concave downward. The first sliding surface S1 is a sliding surface on which the slider 20 can rotate. In this embodiment, the spherical seat portion 10 is made of, for example, ordinary steel or stainless steel.

[0012] The slider 20 is disposed on the first sliding surface S1 of the spherical seat portion 10. The slider 20 is sized such that it can rotate relative to the spherical seat portion 10. The slider 20 slides relative to the spherical seat portion 10 while keeping the distance from the center of the first sliding surface S1 of the spherical seat portion 10 constant, with the center of the first sliding surface S1 as the center.

[0013] The upper platen 30 is located above the slider 20 and below the upper structure U. The upper platen 30 has a second sliding surface S2. The second sliding surface S2 is provided on the upper part of the slider 20. The second sliding surface S2 is a concave spherical surface that is concave upward.

[0014] The upper platen 30 includes a plate-like member 300 and the above-described second sliding surface S2 (sliding surface) on the plate-like member 300. The plate-like member 300 has a concave portion 301 that is provided at the lower part and is concave upward in a concave depression shape. The plate-like member 300 is made of, for example, ordinary steel or stainless steel and is formed by a single member. The surface on the back side in the direction of the depression of the plate-like member 300 is a concave spherical surface 301a that is concave upward in a concave spherical shape. By making the plate-like member 300 made of ordinary steel, that is, iron, the material cost can be reduced and the processing is also easy. Therefore, it is preferable to make the plate-like member 300 of iron, but it may also be made of stainless steel.

[0015] The platen 30 includes a layered portion 302 that is formed in a layered manner on the concave spherical surface 301a of the plate-like member 300. The layered portion 302 has the above-described second sliding surface S2, which is a concave spherical surface that is provided at the lower part and is concave upward. The layered portion 302 is integrally formed with the plate-like member 300. Therefore, the second sliding surface S2 is integrally formed with the plate-like member 300. The second sliding surface S2 is provided on the concave spherical surface 301a of the plate-like member 300. The layered portion 302 is formed of stainless steel. The lower surface of the layered portion 302 facing downward is the second sliding surface S2. Therefore, the second sliding surface S2 is formed of stainless steel.

[0016] In the sliding bearing 100 having each of the above-described configurations, for example, when an earthquake occurs at the installation location of the sliding bearing 100, the first sliding surface S1 and the second sliding surface S2 slide relative to each other.

[0017] FIG. 2 is a view showing a state in which the spherical seat portion 10 and the washer 30 have relatively moved in a substantially horizontal direction in the sliding bearing 100 shown in FIG. 1. As shown in FIG. 2, when the superstructure U and the substructure L relatively move in a substantially horizontal direction, the sliding bearing 100 suppresses the transmission of the shaking on the substructure L side to the superstructure U.

[0018] (Regarding the friction material F) The friction material F according to the present embodiment is disposed, for example, between the first sliding surface S1 and the slider 20 and between the second sliding surface S2 and the slider 20 as shown in FIG. 1. In that case, for example, the friction material F is placed on the first sliding surface S1 and supported by the spherical seat portion 10. Further, for example, the friction material F is placed on the upper portion of the slider 20 and supported by the slider 20. The friction material F may be provided on both the first sliding surface S1 of the spherical seat portion 10 and the opposing surface of the slider 20 facing the first sliding surface S1, or may be provided on either one of the first sliding surface S1 of the spherical seat portion 10 and the opposing surface of the slider 20 facing the first sliding surface S1. Further, the friction material F may be provided on both the second sliding surface S2 of the washer 30 and the opposing surface of the slider 20 facing the second sliding surface S2, or may be provided on either one of the second sliding surface S2 of the washer 30 and the opposing surface of the slider 20 facing the second sliding surface S2. Hereinafter, the friction material F disposed on the first sliding surface S1 and the second sliding surface S2 will be described.

[0019] The friction material F is disposed to impart lubricity to the first sliding surface S1 and the second sliding surface S2.

[0020] In this embodiment, the friction material F contains fibers. In other words, the friction material F is formed of fibers. Here, the material of the friction material F is, for example, PTFE (polytetrafluoroethylene). The friction material F is formed of, for example, a double fabric. The double fabric is formed of, for example, PTFE fibers and fibers having a higher tensile strength than the PTFE fibers (high-strength fibers). Here, examples of the "fibers having a higher tensile strength than the PTFE fibers" include polyamides such as nylon 6.6, nylon 6, and nylon 4.6, polyesters such as polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and fibers such as para-aramid. In addition, fibers such as meta-aramid, polyethylene, polypropylene, glass, carbon, polyphenylene sulfide (PPS), LCP, polyimide, and PEEK can be mentioned. Also, heat-sealable fibers or fibers such as cotton and wool may be used. Among them, PPS fibers having excellent chemical resistance and hydrolysis resistance and extremely high tensile strength are preferable. The friction material F may be a fabric containing PTFE fibers other than the double fabric. The friction material F may be made of only PTFE as the material. The friction material F may be made of a composite material of PTFE and other resins as the material. The friction material F may have a laminated structure of a friction material made of PTFE and a friction material made of other resins.

[0021] (Regarding the manufacturing method of the wad 30) In this embodiment, the wad 30 is manufactured by the following manufacturing method. FIG. 3 is a cross-sectional view for explaining the spraying step and the heating step in the manufacturing method of the wad 30 according to the embodiment. FIG. 4 is a plan view showing the state after the spraying step and the heating step in the manufacturing method of the wad 30 according to the embodiment.

[0022] The method for manufacturing the stack 30 includes a plate member manufacturing step in which the plate member 300 is manufactured. In this plate member manufacturing step, a concave portion 301 including a concave spherical surface 301a that is circular in plan view and has a greater depth toward the center is formed by cutting or the like from a material made of ordinary steel or stainless steel.

[0023] Next, in the method for manufacturing the stack 30, while performing a spraying step of spraying a metal powder, which is a precursor of a sliding surface material, onto the concave spherical surface 301a, which is the sliding surface formation position of the concave portion 301 of the plate member 300, a heating step of heating the metal powder is performed. In other words, the spraying step and the heating step are performed in parallel. Here, the metal powder is made of stainless steel, but it may be made of ordinary steel other than stainless steel. The metal powder, which is a precursor, is in powder form, but it may be in a state other than powder form. The heating step is preferably performed by laser irradiation on the metal powder, which is a precursor, but the metal powder, which is a precursor, may be heated by means other than laser irradiation. By the heating in this heating step, the metal powder, which is a precursor, is melted. In the heating in this heating step, at least a part of the metal powder, which is a precursor, is melted.

[0024] When the heating step is performed while the spraying step is being performed, the metal powder, which is a precursor, is welded to the concave spherical surface 301a of the plate member 300 at the heated portion to form a build-up of a part of the layered portion 302. In the method for manufacturing the stack 30, the build-up formation range of a part of the layered portion 302 by performing such a spraying step and heating step is expanded to form a build-up of the layered portion 302 in a predetermined range of the concave spherical surface 301a. The build-up step of performing the heating step while performing the spraying step is realized, for example, by the 3D printer P. The build-up step of performing the heating step while performing the spraying step may be realized by means other than the 3D printer.

[0025] The method for manufacturing the insert 30 performs a build-up process that includes a heating process while performing such a spraying process to continuously form, for example, a part of the layered portion 302, but it is not necessary to form it continuously. When the method for manufacturing the insert 30 performs a build-up process that includes a heating process while performing a spraying process to continuously form, for example, a part of the layered portion 302, for example, the layered portion 302 is formed in a spiral shape that extends from the radially outer end portion of the concave spherical surface 301a toward the center. At this time, as shown in FIG. 3, it is preferable that the laser R from the head H of the 3D printer P is always irradiated linearly connecting the center of the concave spherical surface 301a and the irradiation position, but it may be irradiated at other angles.

[0026] When the method for manufacturing the insert 30 forms the layered portion 302 in a spiral shape that extends from the radially outer end portion of the concave spherical surface 301a toward the center, it is preferable that the portions adjacent to each other in the radial direction of the spiral partially overlap in the radial direction. Then, the layered portion 302 will be formed without gaps. In this case, the overlapping portion of the spiral is thicker than the non-overlapping portion. As a result, in the concave portion 301 of the plate-like member 300, as shown in FIG. 4, the layered portion 302(A) is formed in a state including a spiral convex portion 302a formed by the overlapping portion of the spiral. By the build-up process that includes a heating process while performing a spraying process, for example, the layered portion 302(A) is formed except in the vicinity of the center of the concave spherical surface 301a.

[0027] Next, the method for manufacturing the insert 30 performs an additional build-up process of forming, for example, the layered portion 302(B) in the vicinity of the center of the concave spherical surface 301a that was not formed by the build-up process that includes a heating process while performing a spraying process, by, for example, TIG build-up welding. At this time, additional build-up is performed so that there is no gap between the layered portion 302(A) and the layered portion 302(B). Note that the layered portion 302(B) in the vicinity of the center of the concave spherical surface 301a may be formed by build-up welding other than TIG build-up welding. By performing the build-up process that includes a heating process while performing a spraying process and the additional TIG build-up process, the concave spherical surface 301a of the plate-like member 300 is entirely covered without gaps by the layered portion 302.

[0028] The method for manufacturing the washer 30 is, next, after the meat stacking step of performing the heating step while performing the spraying step, and is a plating step of plating the plate-shaped member after the additional meat stacking step. This plating step may not be performed. When performing the plating step, it is preferable to perform hot dip galvanizing on the plate-shaped member, but plating other than hot dip galvanizing may also be performed.

[0029] The method for manufacturing the washer 30 is, next, a rough finishing step of cutting the forming position of the second sliding surface S2 of the layered portion 302 after the plating step. This rough finishing step is a step of cutting the side opposite to the concave spherical surface 301a of the layered portion 302 covering the concave spherical surface 301a of the plate-shaped member 300, and is performed, for example, by a lathe.

[0030] The method for manufacturing the washer 30 is, next, a polishing step of forming the second sliding surface S2 by polishing the forming position of the second sliding surface S2 of the layered portion 302 after the plating step. This polishing step is a step of polishing the side opposite to the concave spherical surface 301a of the layered portion 302 covering the concave spherical surface 301a of the plate-shaped member 300 after rough finishing, and is performed, for example, by a grinder.

[0031] Incidentally, the method for manufacturing the washer 30 is, next, an additional plating step of plating the plate-shaped member after the polishing step. This additional plating step may not be performed. When performing the additional plating step, it is preferable to perform hot dip galvanizing on the plate-shaped member, but plating other than hot dip galvanizing may also be performed.

[0032] The washer 30 produced by the above manufacturing method includes a plate-like member 300 and a second sliding surface S2 which is a sliding surface on the plate-like member 300, and there is no gap between the second sliding surface S2 and the plate-like member 300. Here, although the layered portion 302 formed by the build-up process of performing the heating process while performing the spraying process and the additional build-up process may cause dot-like defects between the layered portion 302 and the plate-like member 300, it does not spread in a planar manner between the layered portion 302 and the plate-like member 300. Therefore, there is no gap between the second sliding surface S2 and the plate-like member 300 of the washer 30. The second sliding surface S2 is integrally formed with the plate-like member 300. The second sliding surface S2 is provided on the concave spherical surface 301a of the plate-like member 300. The second sliding surface S2 is formed of stainless steel.

[0033] The washer 30 according to the embodiment described above is a washer included in the sliding bearing 100 disposed between the upper structure U and the lower structure L facing the upper structure U. This washer 30 includes a plate-like member 300 and a second sliding surface S2 which is a sliding surface on the plate-like member 300, and there is no gap between the second sliding surface S2 and the plate-like member 300. In this way, since there is no gap between the second sliding surface S2 and the plate-like member 300 of the washer 30, it is possible to suppress the intrusion of rainwater or the like between them, and thus it is possible to suppress the corrosion occurring between them. Therefore, it is possible to improve the durability of the washer 30. If there is a gap between the second sliding surface S2 and the plate-like member 300, the gap spreads in a planar manner and it is easy for rainwater or the like to intrude due to capillary action. However, even if dot-like defects occur between the second sliding surface S2 and the plate-like member 300, the dot-like defects do not spread in a planar manner unlike the gap, so the intrusion of rainwater or the like is suppressed. When the sliding bearing 100 including this washer 30 is a sliding bearing for a bridge, since it is placed in a particularly harsh environment, the effect of improving durability is high.

[0034] In addition, in the shoe 30 according to the embodiment, the second sliding surface S2, which is a sliding surface, is integrally formed with the plate-like member 300. By integrally forming the plate-like member 300 and the second sliding surface S2, which is a sliding surface, in this way, it becomes unnecessary to pull in a separate member having the second sliding surface S2, which is a sliding surface, to the plate-like member 300 by bolts or the like, which was necessary when providing a separate member. Note that in the shoe 30, the second sliding surface S2, which is a sliding surface, does not have to be integrally formed with the plate-like member 300.

[0035] In addition, in the shoe 30 according to the embodiment, the plate-like member 300 is formed of iron, and the second sliding surface S2, which is a sliding surface, is formed of stainless steel. In this way, the cost can be reduced by forming the plate-like member 300 of iron, and the durability of the second sliding surface S2 can be ensured by forming the second sliding surface S2 of stainless steel. Note that the plate-like member 300 does not have to be formed of iron, and the second sliding surface S2, which is a sliding surface, does not have to be formed of stainless steel.

[0036] In addition, in the shoe 30 according to the embodiment, a concave spherical surface 301a is formed in the plate-like member 300, and since the second sliding surface S2, which is a sliding surface, is provided on the concave spherical surface 301a, the second sliding surface S2 can be easily formed in a concave spherical shape. Note that the concave spherical surface 301a does not have to be provided in the plate-like member 300.

[0037] Since the sliding bearing 100 according to the embodiment includes the shoe 30, the shoe 30 exhibits the above-described effects.

[0038] The method for manufacturing the shoe 30 according to the embodiment is such that in the spraying step, metal powder of the sliding surface material is sprayed onto the concave spherical surface 301a which is the sliding surface formation position of the plate-shaped member 300, and in the heating step, when the metal powder is heated, a layer portion 302 for forming the second sliding surface S2 which is the sliding surface can be formed by welding on the concave spherical surface 301a which is the sliding surface formation position of the plate-shaped member 300. Thereby, the mold for forming the sliding surface member, which is prepared when the plate-shaped member and the sliding surface forming member are manufactured separately, becomes unnecessary. Since the mold becomes unnecessary in this way, it is particularly suitable for use in a one-of-a-kind sliding bearing for a bridge.

[0039] Also, in the method for manufacturing the shoe 30 according to the embodiment, since the heating step is performed by laser irradiation on the metal powder, instantaneous heating with heat input to the plate-shaped member suppressed by the laser becomes possible, and the quality of the shoe 30 can be improved. Note that the heating step may be performed by means other than laser irradiation.

[0040] Also, in the method for manufacturing the shoe 30 according to the embodiment, plating is applied to the plate-shaped member 300 after the heating step in the plating step, so the durability of the plate-shaped member 300 can be further improved. Particularly in the case of the sliding bearing 100 for a bridge placed in a harsh environment, the effect of further improving the durability of the plate-shaped member 300 is high. Also, in the polishing step, polishing is performed on the formation position of the second sliding surface S2 which is the sliding surface after the plating step to form the second sliding surface S2, so the accuracy of the second sliding surface S2 can be improved. Note that the plating step may not be performed.

[0041] Also, in the method for manufacturing the shoe 30 according to the embodiment, since hot dip galvanizing is applied to the plate-shaped member 300 after the heating step in the plating step, long-term durability of the shoe 30 becomes possible. Particularly in the case of the sliding bearing 100 for a bridge placed in a harsh environment, the effect of enabling long-term durability of the shoe 30 is high. Note that in the plating step, plating other than hot dip galvanizing may be applied to the plate-shaped member after the heating step.

[0042] In addition, in the method for manufacturing the washer 30 according to the embodiment, since the spraying step and the heating step are performed in parallel, a layer portion 302 for easily and accurately forming the second sliding surface S2, which is a sliding surface, on the plate-shaped member 300 can be formed. Note that the spraying step and the heating step do not necessarily have to be performed in parallel.

[0043] In addition, in the method for manufacturing the washer 30 according to the embodiment, since the spraying step and the heating step are realized by a 3D printer, a layer portion 302 for easily and accurately forming the second sliding surface S2, which is a sliding surface, on the plate-shaped member 300 can be formed. Note that the spraying step and the heating step do not necessarily have to be realized by a 3D printer.

[0044] In the above embodiment, the washer 30 to which the single pendulum type sliding bearing 100 is provided, in which the washer 30 is fixed to the upper structure U, the spherical seat portion 10 is fixed to the lower structure L, and the washer 30 is horizontally relatively movable with respect to the slider 20 provided between the washer 30 and the spherical seat portion 10, has been described as an example. However, the present invention is not limited to this. For example, an upper washer is fixed to the upper structure U, a lower washer is fixed to the lower structure L, and at least one of the upper washer and the lower washer provided with a double pendulum type sliding bearing in which both the upper washer and the lower washer are horizontally relatively movable with respect to the support provided between the upper washer and the lower washer can be manufactured in the same manner as the washer 30 and have the same configuration as the washer 30.

[0045] In the above embodiment, the sliding bearing 100, which is a spherical sliding bearing in which the second sliding surface S2 of the washer 30 is a concave spherical surface, has been described as an example. However, the present invention is not limited to this. For example, it is also applicable to a planar sliding bearing in which the washer has a planar sliding surface.

[0046] (Supplementary Note) The method for manufacturing the sliding bearing and the sliding bearing having a spherical surface according to the above embodiment can be understood as follows, for example.

[0047] (1) The washer according to one aspect of the present disclosure is A top plate or a bottom plate provided with a sliding bearing disposed between an upper structure and a lower structure facing the upper structure, The plate includes a plate-like member and a sliding surface on the plate-like member. There is no gap between the sliding surface and the plate-like member.

[0048] Thus, in the plate according to one aspect of the present disclosure, since there is no gap between the sliding surface and the plate-like member, it is possible to suppress the intrusion of rainwater or the like between them, and therefore, it is possible to suppress the corrosion occurring between them. Therefore, it is possible to improve the durability.

[0049] (2) In the top plate or the bottom plate according to (1) above, The sliding surface may be configured to be integrally formed with the plate-like member.

[0050] With this configuration, by integrally forming the plate-like member and the sliding surface, it is not necessary to pull in the separate member to the plate-like member with bolts or the like, which was necessary when providing a separate member having a sliding surface separately from the plate-like member.

[0051] (3) In the plate according to (1) or (2) above, The plate-like member is formed of iron, The sliding surface may be formed of stainless steel.

[0052] With this configuration, the cost can be reduced by forming the plate-like member of iron, and the durability of the sliding surface can be ensured by forming the sliding surface of stainless steel.

[0053] (4) In the plate according to any one of (1) to (3) above, A concave spherical surface is formed on the plate-like member, The sliding surface may be provided on the concave spherical surface.

[0054] With this configuration, it is possible to easily form the sliding surface in a concave spherical shape.

[0055] (5) The sliding bearing according to one aspect of the present disclosure includes a washer according to any one of (1) to (4) above. It includes a washer according to any one of (1) to (4) above.

[0056] Thus, since the sliding bearing includes a washer according to any one of (1) to (4) above, the washers exhibit the above-described effects respectively.

[0057] (6) A method for manufacturing a washer according to one aspect of the present disclosure is a method for manufacturing an upper washer or a lower washer provided in a sliding bearing disposed between an upper structure and a lower structure facing the upper structure, wherein the washer includes a plate-like member and a sliding surface on the plate-like member, a spraying step of spraying a metal powder of a sliding surface material onto a sliding surface formation position of the plate-like member, a heating step of heating the metal powder, and includes.

[0058] Thus, in the method for manufacturing a washer, by the spraying step, a metal powder, which is a precursor of a sliding surface material, is sprayed onto the sliding surface formation position of the plate-like member, and by the heating step, when the metal powder as a precursor is heated, a layered portion for forming a sliding surface can be formed by welding at the sliding surface formation position of the plate-like member. As a result, a mold for forming a sliding surface forming member, which is prepared when the plate-like member and the sliding surface forming member are manufactured separately, becomes unnecessary. Since the mold becomes unnecessary in this way, it is particularly suitable for use in a sliding bearing for a bridge with one product having one specification.

[0059] (7) In the method for manufacturing an upper washer or a lower washer according to (6) above, the heating step may be configured to be performed by laser irradiation on the metal powder.

[0060] With this configuration, since the heating step is performed by laser irradiation on the metal powder, instantaneous heating with suppression of heat input to the plate-like member by the laser becomes possible, and the quality of the washer can be improved.

[0061] (8) In the method for manufacturing the upper or lower die according to (6) or (7) above, a plating step of plating the plate-like member after the heating step, and a polishing step of polishing the formation position of the sliding surface after the plating step, may be included as a configuration.

[0062] With this configuration, in the plating step, plating is performed on the plate-like member after the heating step, so the durability of the plate-like member can be further improved. Also, in the polishing step, polishing is performed on the formation position of the sliding surface after the plating step to form the sliding surface, so the accuracy of the sliding surface can be improved.

[0063] (9) In the method for manufacturing the upper or lower die according to (8) above, the plating step may be configured to perform hot dip galvanizing on the plate-like member after the heating step.

[0064] With this configuration, since the plating step performs hot dip galvanizing on the plate-like member after the heating step, long-term durability of the upper or lower die becomes possible.

[0065] (10) In the method for manufacturing the upper or lower die according to any one of (6) to (9) above, the spraying step and the heating step may be performed in parallel.

[0066] With this configuration, since the spraying step and the heating step are performed in parallel, a layered portion for easily and accurately forming a sliding surface can be formed on the plate-like member.

[0067] (11) In the method for manufacturing the upper or lower die according to any one of (6) to (10) above, the spraying step and the heating step may be realized by a 3D printer.

[0068] With this configuration, since the spraying process and the heating process are realized by a 3D printer, a layered portion for easily and accurately forming a sliding surface can be formed on the plate-like member.

Explanation of Signs

[0069] 10 Ball seat portion 20 Slider 30 Upper plate (or lower plate) 100 Sliding bearing 300 Plate-like member 301 Concave portion 301a Concave spherical surface 302 Layered portion F Friction material H Head L Lower structure P 3D printer R Laser S1 First sliding surface S2 Second sliding surface (sliding surface) U Upper structure

Claims

1. A method for manufacturing a shoe provided in a sliding bearing disposed between an upper structure and a lower structure facing the upper structure, comprising the steps of: The shoe includes a plate-like member and a sliding surface on the plate-like member, a spraying step of spraying metal powder as a sliding surface material onto a position where the sliding surface is to be formed on the plate-like member; a heating step of heating the metal powder; Including, How to make shoes.

2. The heating step is performed by irradiating the metal powder with a laser. A method for making the shoe according to claim 1.

3. a plating step of plating the plate-like member after the heating step; a polishing step of polishing the position where the sliding surface is formed after the plating step; 3. A method for making the shoe of claim 2, comprising:

4. The plating step includes performing hot-dip galvanizing on the plate-like member after the heating step. A method for making the shoe according to claim 3.

5. The spraying step and the heating step are performed in parallel. A method for making the shoe according to claim 1.

6. The method for manufacturing a shoe according to any one of claims 1 to 5, wherein the spraying step and the heating step are performed by a 3D printer.

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