Inlay method and inlaid product

Abstract

Improve the productivity of the inlay product and increase the degree of freedom of the inlay pattern. 【Solution means】Insert the convex portion 32 of the metal inlay member 3 into the concave portion 21 of the metal base material 2, deform the opening end portion 21a of the concave portion 21 inwardly of the opening by the enlarged portion 33 of the metal inlay member 3, and bring the deformed opening end portion 21a into close contact with the outer peripheral surface of the convex portion 32 to fix the metal inlay member 3 to the metal base material 2.

Description

Technical Field

[0001] The present invention relates to an inlay method and an inlaid product.

Background Art

[0002] Conventional inlay methods include various methods such as line inlay, flat inlay, cloth pattern inlay, and high-relief inlay.

[0003] And these inlay methods include, for example, as shown in Patent Document 1, (1) a step of carving a recess such as a groove for fitting an inlay material into a base material, (2) a step of cutting the inlay material to fit the formed recess, and (3) a step of fitting the cut inlay material into the recess using a hammer or a dedicated tool.

[0004] However, in conventional inlay methods, when the pattern becomes complex or fine, the steps of carving a recess in the material, cutting the inlay material, and fitting the inlay material into the recess require advanced techniques and fine operations. Therefore, conventional inlay methods have problems such as poor productivity and limited freedom of inlay patterns.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, the present invention has been made to solve the above problems, and an object thereof is to increase the freedom of inlay patterns and improve the productivity of inlaid products.

Means for Solving the Problems

[0007] That is, the fitting method according to the present invention is a metal fitting technique for manufacturing a fitted product by fitting a metal fitting member into a metal base material. The metal base material has a concave portion, and the metal fitting member has a decorative portion that is larger than the opening of the concave portion in plan view, a convex portion that is formed on the lower surface of the decorative portion and is inserted into the concave portion, and a tapered portion that is formed at the base end portion of the convex portion and gradually expands as it goes to the lower surface of the decorative portion. The convex portion of the metal fitting member is inserted into the concave portion of the metal base material, the opening end portion of the concave portion is deformed inward by the tapered portion, and the deformed opening end portion is brought into close contact with the outer peripheral surface of the convex portion to fix the metal fitting member to the metal base material.

[0008] With this fitting method, by inserting the convex portion of the metal fitting member into the concave portion of the metal base material, a decorative portion can be provided on the surface of the metal base material. Therefore, it is not necessary to engrave a concave portion corresponding to the fitting pattern on the metal base material, high-level technology is not required, and fine work can be reduced. As a result, the degree of freedom of the fitting pattern can be increased, and the productivity of the fitted product can be improved. Also, during the process of inserting the convex portion of the metal fitting member into the concave portion of the metal base material, the tapered portion of the metal fitting member deforms the opening end portion of the concave portion, and the deformed opening end portion bites into the outer peripheral surface of the convex portion. Thus, the fixing of the metal fitting member to the metal base material can be simplified. Furthermore, in the conventional fitting method, the opening edge of the concave portion becomes the boundary of the pattern, and it is necessary to pay careful attention so that the opening edge of the concave portion does not deform when embedding the fitting material. However, in the present invention, the boundary of the pattern becomes the contour portion of the decorative portion, and it is not necessary to pay careful attention so as not to deform the opening edge of the concave portion as in the prior art, and the boundary of the pattern can be made beautiful.

[0009] The metal fitting member further has a constricted portion formed on the tip side of the convex portion with respect to the tapered portion, and it is desirable to fix the metal fitting member to the metal base material by bringing the deformed opening end portion into close contact with the constricted portion. With this configuration, the deformed opening end can enter and adhere to the constricted portion, further strengthening the fixation of the metal fitting member to the metal base material.

[0010] Specifically, the fitting method preferably includes a recess forming step of forming the recess in the metal base material and a depression forming step of forming a depression on the inner peripheral surface of the recess. With this configuration, since a depression is formed on the inner peripheral surface of the recess, it is easy to deform the opening end of the recess inward by the enlarged portion of the metal fitting member. Also, by partially forming a depression on the inner peripheral surface of the recess, a part of the convex portion can enter the depression, preventing the metal fitting member from rotating relative to the metal base material.

[0011] The tip surface of the convex portion is a flat surface, and the recess forming step makes the bottom surface of the recess a flat surface corresponding to the tip surface of the convex portion. It is desirable to fix the metal fitting member to the metal base material by bringing the deformed opening end into close contact with the outer peripheral surface of the convex portion and bringing the tip surface of the convex portion into close contact with the bottom surface of the recess. With this configuration, not only does the deformed opening end adhere to the outer peripheral surface of the convex portion, but also the tip surface of the convex portion adheres to the bottom surface of the recess, so that the metal fitting member can be stably fixed to the metal base material.

[0012] The fitting method preferably includes a fitting member forming step of forming the metal fitting member using a precision casting method.

[0013] When fixing the metal fitting member to the metal base material after decorating the decoration part, there is a risk that patterns such as the uneven shape decorated in the fitting operation will be deformed. Therefore, the fitting method of the present invention preferably includes a decoration step of decorating the decoration part after fixing the metal fitting member to the metal base material. With this configuration, by applying decoration to the decorative part after fixing the metal inlay member to the metal base material, the pattern of the decorative part can be made beautiful. Further, the stress generated by applying decoration to the decorative part causes the enlarged part to deform the opening end more, and the fixing of the metal inlay member to the metal base material can be made even stronger.

[0014] Further, the inlay product according to the present invention is an inlay product formed by fitting a metal inlay member into a metal base material, wherein the metal base material has a concave portion, and the metal inlay member has a convex portion inserted into the concave portion, a decorative portion wider than the convex portion and having an upper surface decorated, and an enlarged portion formed at a base end portion of the convex portion and gradually expanding as it goes to the lower surface of the decorative portion. The convex portion of the metal inlay member is inserted into the concave portion of the metal base material, the opening end portion of the concave portion is deformed inward of the opening by the enlarged portion, and the deformed opening end portion is in close contact with the outer peripheral surface of the convex portion, and the metal inlay member is fixed to the metal base material.

Advantages of the Invention

[0015] According to the present invention configured as described above, the degree of freedom of the inlay pattern can be increased, and the productivity of the inlay product can be improved.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0017] Hereinafter, an embodiment of the fitting method according to the present invention will be described with reference to the drawings. Note that, for the sake of clarity, all the figures shown below are schematically drawn with appropriate omissions or exaggerations. The same components are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0018] <Outline of the fitting method> As shown in FIG. 1, the fitting method of the present embodiment is a fitting method for manufacturing a fitted product by fitting a metal fitting member 3 into a metal base material 2.

[0019] The metal base material 2 is, for example, a metal base material such as iron, brass, or quarter (an alloy of silver and copper). Note that the metal base material 2 may be formed on a flat plate, or may be processed into a predetermined shape such as a ring shape or a container shape. Further, a concave portion 21 is formed in the metal base material 2 by a drill tool or the like.

[0020] The metal fitting member 3 is made of a metal different from the metal base material 2, and is, for example, gold, silver, or a copper alloy. This metal fitting member 3 is fitted into the concave portion 21 of the metal base material 2, and has a decorative portion 31 that is larger than the opening of the concave portion 21 in plan view, a convex portion 32 that is formed on the lower surface of the decorative portion 31 and is inserted into the concave portion 21, an enlarged portion 33 that is formed at the base end portion 32a of the convex portion 32 and gradually expands as it goes to the lower surface of the decorative portion 31, and a constricted portion 34 that is formed on the tip side of the convex portion 32 with respect to the enlarged portion 33 and into which the opening end portion 21a of the concave portion 21 enters. The detailed configuration of the metal fitting member 3 will be described later.

[0021] <Details of the fitting method> Hereinafter, the details of the fitting method of the present embodiment will be described.

[0022] As shown in FIG. 2, the fitting method of the present embodiment includes the following steps (1) to (5). (1) A concave portion forming step of forming a concave portion 21 in the metal base material 2 (2) A recess forming step of forming a recess 22 on the inner peripheral surface of the concave portion 21 of the metal base material 2 (3) Insertion member forming step of forming the metal insertion member 3 (4) Fixing step of inserting and fixing the convex portion 32 of the metal insertion member into the concave portion 21 of the metal base material 2 (5) Decorating step of decorating the decorative portion 31 of the metal insertion member fixed to the metal base material 2

[0023] Note that the order of (1) concave portion forming step and (2) depression portion forming step and (3) insertion member forming step does not matter, and either can be performed first.

[0024] (1) Concave portion forming step In the concave portion forming step, the concave portion 21 is formed by a drill tool according to the number of metal insertion members 3 to be decorated on the metal base material 2. The concave portion 21 formed by this drill tool has a circular cross-section along the axial direction (depth direction). Note that the diameter of the concave portion 21 is, for example, 0.8 to 1.6 mm.

[0025] Also, in the concave portion forming step, the bottom surface of the concave portion 21 is made flat. Here, after forming the concave portion 21 with a drill tool, an end mill tool with a flat tip is used to make the bottom surface of the concave portion 21 flat. The depth to the bottom surface of the concave portion 21 formed in this way is substantially the same as or slightly shorter than the length of the convex portion 32 of the metal insertion member 3. Note that the depth to the bottom surface of the concave portion 21 is, for example, 0.8 mm. Also, the bottom surface of the concave portion 21 corresponds to the tip surface of the convex portion 32, and is configured such that the bottom surface of the concave portion 21 and the tip surface of the convex portion 32 are in close contact in a state where the metal insertion member 3 is fixed to the metal base material 2.

[0026] (2) Depression portion forming step In this depression portion forming step, the inner peripheral surface of the concave portion 21 formed in the concave portion forming step is partially recessed radially outward to form the depression portion 22. Here, a grinding tool is used to partially cut the inner peripheral surface of the concave portion 21 to form the depression portion 22. Also, one depression portion 22 may be formed on the inner peripheral surface of the concave portion 21, or a plurality of depression portions 22 may be formed intermittently along the circumferential direction.

[0027] (3) Insertion member forming step In this inlay member forming step, the metal inlay member 3 is formed using a precision casting method. Here, for example, the lost wax method can be used as the precision casting method. In the lost wax method of the present embodiment, a prototype of the metal inlay member 3 is made of wax, the periphery of this prototype is covered and solidified with casting sand, and the melted metal is poured into the cavity formed by melting and removing the wax inside by heating to manufacture the metal inlay member 3.

[0028] In the metal inlay member 3 of the present embodiment, the upper surface of the decorative portion 31 is decorated by engraving or the like. Also, the lower surface of the decorative portion 31 has a shape along the surface of the metal base material 2. Here, the upper surface of the metal base material 2 is flat, and the lower surface of the decorative portion 31 is also flat. This decorative portion 31 extends radially outward from the opening of the concave portion 21.

[0029] Further, the convex portion 32 has a shape corresponding to the concave portion 21 of the metal base material 2, and specifically has a cylindrical shape (see FIG. 1(c)). The outer dimensions of this convex portion 32 are substantially the same as the opening dimensions of the concave portion 21, for example, 0.8 to 1.6 mm.

[0030] Furthermore, the enlarged portion 33 is a rounded portion that continuously increases in diameter as it goes to the lower surface of the decorative portion 31 at the base end portion 32a of the convex portion 32 (see FIG. 1(c)). The radius of the rounded portion is, for example, 0.05 to 0.1 mm. Note that the enlarged portion 33 may be a tapered portion. Also, the enlarged portion 33 may be formed over the entire outer peripheral portion of the convex portion 32, or may be formed intermittently on the outer peripheral portion of the convex portion 32. In addition, the enlarged portion 33 may have a shape that deforms the opening end portion 21a of the concave portion 21 inward of the opening.

[0031] In addition, the constricted portion 34 is formed continuously or adjacently to the enlarged portion 33 on the tip side of the convex portion 32 in the enlarged portion 33 (see Fig. 1(c)). Further, the constricted portion 34 is a portion having a cross-sectional area smaller than the cross-sectional area of the convex portion 32, and may be formed by cutting out the entire circumferential direction of the convex portion 32, or may be formed by partially cutting out a part of the circumferential direction of the convex portion 32. This constricted portion 34 may be integrally formed by the precision casting method described above, or may be formed by shaving the convex portion 32 of the metal inlay member 3 formed by the precision casting method with a file or the like. This constricted portion 34 has a cross-sectional curved shape, but may also have a triangular cross-section or a rectangular cross-section. In addition, the constricted portion 34 only needs to be configured such that the deformed opening end portion 21a enters and adheres closely, and the shape does not matter.

[0032] (4) Fixing process In this fixing process, the convex portion 32 of the metal inlay member 3 is inserted into the concave portion 21 of the metal base material 2, and the metal inlay member 3 is pressed against the metal base material 2. Then, as shown in Fig. 3, the enlarged portion 33 formed at the base end portion 32a of the convex portion 32 presses the opening end portion 21a of the concave portion 21 downward. Here, since the recessed portion 22 is formed on the inner circumferential surface of the concave portion 21, when the opening end portion 21a of the concave portion 21 is pressed downward by the enlarged portion 33, it deforms inward of the opening. Then, the deformed opening end portion 21a enters and adheres closely to the constricted portion 34 formed on the outer circumferential surface of the convex portion 32. Further, by configuring the length dimension of the convex portion 32 to be larger than the depth dimension of the concave portion 21, the convex portion 32 bulges and deforms radially outward and enters the recessed portion 22 formed on the inner circumferential surface of the concave portion 21. In this state, the tip surface of the convex portion 32 is in close contact with the bottom surface of the concave portion 21. Thus, the metal inlay member 3 is fixed to the metal base material 2.

[0033] (5) Decoration process In this decoration process, after the metal inlay member 3 is fixed to the metal base material 2, the decoration part 31 of the metal inlay member 3 is decorated. Here, examples of the decoration of the decoration part 31 include engraving a pattern, design, or the like on the surface (upper surface) of the decoration part 31. Due to this engraving process, as the decoration part 31 deforms, the enlarged part 33 deforms the opening end part 21a further and adheres to the constricted part 34, making the fixation of the metal inlay member 3 to the metal base material 2 even stronger.

[0034] <Effects of the present embodiment> According to the inlay method of the present embodiment, by inserting the convex part 32 of the metal inlay member 3 into the concave part 21 of the metal base material 2, a decoration part 31 can be provided on the surface of the metal base material 2. Therefore, there is no need to engrave a concave part corresponding to the inlay pattern on the metal base material 2, no advanced technology is required, and detailed work can be reduced. As a result, the degree of freedom of the inlay pattern can be increased, and the productivity of the inlay product can be improved.

[0035] Also, during the process of inserting the convex part 32 of the metal inlay member 3 into the concave part 21 of the metal base material 2, the enlarged part 33 of the metal inlay member 3 deforms the opening end part 21a of the concave part 21, and the deformed opening end part 21a bites into the outer peripheral surface of the convex part 32, enabling the fixation of the metal inlay member 3 to the metal base material 2 to be simplified.

[0036] Furthermore, in the conventional inlay method, the opening edge of the concave part 21 serves as the boundary of the pattern, and great care had to be taken to ensure that the opening edge of the concave part 21 does not deform when embedding the inlay material. However, in the present embodiment, the boundary of the pattern becomes the contour part of the decoration part 31, eliminating the need for the meticulous attention to prevent the opening edge of the concave part 21 from deforming as in the prior art, and enabling the boundary of the pattern to be made beautiful.

[0037] <Modified embodiment of the present invention> Note that the present invention is not limited to the above-described embodiment.

[0038] For example, although the concave part 21 in the above-described embodiment has a configuration having a recessed part 22, it may be a sawtooth groove.

[0039] Also, the metal inlay member 3 of the above embodiment has a configuration having one convex portion 32, but it may have a configuration having two or more convex portions 32.

[0040] In the above embodiment, the concave portion 21 has a circular cross-sectional shape, and the convex portion 32 has a cylindrical shape. However, the shapes of the concave portion 21 and the convex portion 32 may be other shapes such as an elliptical cross-sectional shape or a rectangular shape.

[0041] Needless to say, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit thereof.

Explanation of Reference Numerals

[0042] 100... Inlay product 2... Metal base material 21... Concave portion 21a... Opening end 22... Depression 3... Metal inlay member 31... Decorative portion 32... Convex portion 33... Enlarged portion

Claims

1. An inlaying method for manufacturing an inlaid product by fitting a metal inlay member into a metal base material, wherein the metal base material has a recess, the metal inlay member has, in a plan view, a decorative portion larger than the opening of the recess, a convex portion formed on the lower surface of the decorative portion and inserted into the recess, and an enlarged portion formed at the base end portion of the convex portion and gradually expanding as it goes to the lower surface of the decorative portion, the convex portion of the metal inlay member is inserted into the recess of the metal base material, the opening end portion of the recess is deformed inward of the opening by the enlarged portion, and the deformed opening end portion is brought into close contact with the outer peripheral surface of the convex portion to fix the metal inlay member to the metal base material.

2. The metal inlay member further has a constricted portion formed on the tip side of the convex portion with respect to the enlarged portion, The inlaying method according to claim 1, wherein the deformed opening end portion is brought into close contact with the constricted portion to fix the metal inlay member to the metal base material.

3. An inlaying method according to claim 1 or 2, comprising a recess forming step of forming the recess in the metal base material and a depression forming step of forming a depression on the inner peripheral surface of the recess.

4. The tip surface of the convex portion is a flat surface, the recess forming step makes the bottom surface of the recess a flat surface corresponding to the tip surface of the convex portion, The inlaying method according to claim 3, wherein the deformed opening end portion is brought into close contact with the outer peripheral surface of the convex portion and the tip surface of the convex portion is brought into close contact with the bottom surface of the recess to fix the metal inlay member to the metal base material.

5. An inlaying method according to claim 1 or 2, comprising an inlay member forming step of forming the metal inlay member by using a precision casting method.

6. An inlaying method according to claim 1 or 2, comprising a decoration step of decorating the decorative portion after fixing the metal inlay member to the metal base material.

Images