JP2005070391A - Pipe material for wind instrument and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material for a pipe of a wind instrument that has a high texture and good corrosion resistance and is light, and a method for producing the material.
A pipe material for a wind instrument comprising an outer tube and an inner tube in contact with the outer tube, wherein the outer tube is made of a K18 or K14 carat gold alloy, and the inner tube is made of silver 18-48. It is a pipe material for wind instruments composed of a copper alloy of 0.5%, palladium 1 to 4%, indium 0.5 to 3%, and the balance copper. This pipe material is made by inserting a core material made of a material constituting the inner pipe into a pipe made of a material constituting the outer pipe, press-contacting both, and cutting the core material to make it hollow, so that the inner pipe, It can be manufactured without causing the outer tube to be displaced or peeled off.
[Selection] Figure 1

Description

  The present invention relates to a pipe material that is a raw material for parts of wind instruments, and a method for manufacturing the same.

Wind instruments such as flute, piccolo, and saxophone are composed of various parts such as pipes (main pipes, head pipes, leg pipes), tone holes, and mouthpieces. As materials for wind instruments, Western white, gold alloy, silver alloy (silver-7.5% copper alloy, sterling silver), copper alloy (60% copper-silver alloy), platinum alloy, sintered silver alloy are known. (For materials for conventional wind instruments, see, for example, Patent Documents 1 and 2).
JP-A-5-33085 JP-A-5-173548

  A number of properties are unexpectedly required for materials for wind instruments. The first requirement is a texture (brightness, hue) and corrosion resistance that can maintain the texture. This is because music is an art, and for those who play and listen to musical instruments, the texture of the instrument is one of the elements for enjoying music. And since the wind instruments are always in contact with the performer, there is a risk of discoloration of the instrument due to sweat or sebum, or there is a risk of discoloration in the atmosphere during storage, so corrosion resistance is sufficient to maintain its texture. It becomes important. Moreover, mechanical strength is also required for materials for wind instruments. The mechanical strength can affect the sound quality as well as prevent wind instruments from being damaged.

  Furthermore, the wind instrument material is preferably lightweight so that the performer can hold the instrument for a long time during performance. And while being lightweight, high hardness is also calculated | required. This is to prevent scratches during use or storage. In addition, the musical instrument is also a precision instrument, and in order to maintain the timbre, distortion and dimensional deformation of the parts should be avoided. For this reason, a material with high hardness is preferable.

  And the material for wind instruments is still more preferable if it satisfies the above properties and is low cost. Since the material cost is directly reflected in the price of the wind instrument, it is not always appropriate to pursue a high-class feeling using a very expensive metal that emphasizes the texture. This is because art should be widely enjoyable by the general public, and it is preferable to be able to get good quality instruments at an affordable price. For that purpose, material cost is also an important factor.

  Although the above-mentioned materials have both merits and demerits, since they all have the above characteristics, they are used as materials for wind instruments. However, it can be said that it is more preferable if there is a material of higher quality and lower cost than before.

  By the way, the main parts of wind instruments are pipes. A pipe is the component that occupies the largest area (volume) in a wind instrument, and it can also be said that a pipe influences the tone.

  Therefore, the present invention aims to provide an improved material for processing a pipe of a wind instrument, to provide a material for a pipe of a wind instrument that has a high texture and good corrosion resistance and is lightweight, and a method for manufacturing the same. To do.

  The inventors of the present invention have studied to solve the above-described problems, and have considered that a pipe material in which a plurality of materials are combined is appropriate. In other words, for elements that can affect the appearance of wind instruments such as texture, corrosion resistance, and hardness, materials that are excellent in these characteristics are placed on the outside, and for elements that are unrelated to the appearance of wind instruments such as weight (specific gravity) and cost. It was considered that the above-mentioned object can be achieved by forming a double structure in which a material having excellent characteristics is arranged inside.

  Here, the inventors of the present invention decided that a carat gold alloy having a good texture and good corrosion resistance is suitable as the material of the outer tube in such a double tube. The carat gold alloy is a gold alloy containing gold as a main component and adding silver, copper, or, optionally, zinc as an alloy element, and indicates the gold concentration in the alloy in carats. The gold alloy applied in the present invention is a gold alloy of K18 and K14. The former is a gold alloy in which gold is 75% by weight and the total amount of silver and copper is 25% by weight, and the latter is 58.5% by weight of gold and the total amount of silver and copper is 41.5% by weight gold alloy.

  On the other hand, when examining the inner inner tube, the present inventors considered that a material having a texture close to that of K18 and K14 gold alloys constituting the outer tube in addition to the specific gravity and material cost is preferable. This is because when processing a double pipe into a pipe of a wind instrument, for example, when processing a tone hole, the inner pipe will also be exposed on the front side of the pipe, and if the inner pipe has a completely different appearance from the outer pipe, This is because it takes into account that a step is generated and the texture of the wind instrument is impaired. Therefore, the present inventors have examined a material that is lightweight, low-cost, and has an appearance similar to K18 and K14 as the material of the inner tube, and as a result, the copper alloy having a predetermined composition is optimal. I found it. And based on these knowledge, this invention was completed.

  That is, the present invention is a pipe material for a wind instrument comprising an outer tube and an inner tube in contact with the outer tube, the outer tube is made of K18 or K14 carat gold alloy, and the inner tube is silver 18-48. It is a pipe material for wind instruments composed of a copper alloy of 0.5%, palladium 1 to 4%, indium 0.5 to 3%, and the balance copper.

  In the present invention, the characteristics affecting the appearance of the pipe of the wind instrument are borne by the gold alloy constituting the outer tube. Gold alloy is excellent in texture and brightness, and also has good corrosion resistance. Even if it touches the player's sweat or sebum, the texture is not impaired. And the copper alloy employ | adopted as an inner tube | pipe by this invention has light specific gravity, and since it is a copper alloy, material cost is also low. Therefore, the pipe material according to the present invention has characteristics required as a wind instrument material by a combination of an outer tube and an inner tube. In the present invention, since the pipe is made of a double material of different materials, a positive influence on the tone of the wind instrument can be expected. Furthermore, the gold alloy and the copper alloy constituting the pipe material according to the present invention both have good workability and can cope with complicated processing such as tone hole processing.

  Here, the thicknesses of the outer tube and the inner tube are not particularly limited, but it is preferable that the thickness be the same as that of a commonly used wind instrument. Is preferably in the range of 0.25 to 0.45. In this case, the thickness of the inner tube is preferably 0.25 to 0.4 mm, and the thickness of the outer tube is preferably 0.03 to 0.2 mm.

  Next, a method for manufacturing a pipe material according to the present invention will be described. Since the pipe material according to the present invention is a double pipe made of different materials, it is considered that the pipe material can be manufactured by overlapping and joining the pipes. However, since the pipe material of the present invention used as a part of a wind instrument is thin as described above, and the outer tube may be 1 mm or less in particular, a pipe-shaped outer tube and inner tube are manufactured from the beginning and joined together. It is difficult to do. Therefore, as a method of manufacturing a pipe material according to the present invention, a solid core material made of a copper alloy that is a constituent material of an inner pipe and a pipe made of a gold alloy that is a constituent material of an outer pipe are joined together. After plastic working until the thickness of the outer tube part reaches a desired thickness, the core part is cut and hollowed to produce the inner pipe part, thereby forming a thin double pipe. it can.

  Here, when joining the cylindrical core material used as an inner pipe and the pipe used as an outer pipe, joining by brazing is common, and the pipe raw material concerning this invention can also be manufactured once. However, there are several problems in the production of double pipes using brazing material.

  In other words, after joining the core material and the pipe, it is necessary to make a process to make the outer tube part thinner by processing. In this process, the outer tube part should be made to have a uniform thickness. is required. For this purpose, the core material and the pipe must be uniformly bonded over the entire surface. Joining with a brazing material may be insufficient in this respect, and peeling may occur during processing. Further, in order to strengthen the joining, it is desirable to select an optimum brazing material in selecting a brazing material to be used, and a brazing material having the same component system as the alloy to be joined is preferable. In the present invention, both the outer tube (Au—Ag—Cu (—Zn) -based alloy) and the inner tube (Cu—Ag—Pd—In-based alloy) are alloys composed of a plurality of elements. Selection of materials is difficult.

  Therefore, as a method for joining the core material (inner tube) and the pipe (outer tube), a method using pressure welding is preferable. In the case of pressure welding, an intermediate material such as a brazing material is unnecessary, and there is no fear of poor bonding due to the selection. Specifically, as the method of press contact, for example, the core material and the pipe can be closely bonded and pressed to be joined by compressing the pipe into which the core material is inserted. In addition, this pressure welding may be either a cold process or a hot process, and can be appropriately selected.

  Further, in the pressure welding, it is preferable to perform the pressure welding after silver plating is applied to at least one of the surface of the core material or the inner surface of the pipe. This is because the joint surface is smoothed by plating and improves the adhesion between the core material and the pipe during pressure welding. The thickness of the silver plating may be a relatively thin one of 0.01 to 3 μm.

  In addition, as a process for making the pipe material after press-contacting into a desired dimension, a pipe material of a predetermined dimension is manufactured by extruding, drawing, cutting, pipe rolling, or the like alone or in combination.

  As described above, the pipe material according to the present invention has a highly decorative texture and high corrosion resistance, so that the texture can be maintained for a long time. And since specific gravity is low and it is lightweight, it is suitable as a material for parts of a wind instrument. In particular, the pipe material according to the present invention is suitable for wind instruments for the general public because of its low material cost.

  Hereinafter, preferred embodiments of the present invention will be described. First, a copper alloy ingot (composition: 42% by weight Ag-2% by weight Pd-1% by weight In-55% by weight Cu) to be an inner tube is manufactured by a melt casting method and further shaped into a cylindrical core material. Surface finishing was performed by chamfering (outer diameter: 100 mm). Then, silver plating was applied to the surface of the core material. The plating thickness at this time was 1 μm. On the other hand, a gold alloy (K14 alloy, composition: 58.5 wt% Au-8.3 wt% Ag-31.9 wt% Cu-1.3 wt% Zn) to be the outer tube was similarly manufactured by melt casting. After forming into a flat plate shape, it was formed into a pipe shape and the end portion was welded to form a pipe (outer diameter: 105 mm).

  Next, the plated core material was fitted into a pipe, and this was cold-compressed to press the core material and the outer tube, and then extruded. In the extrusion process, the outer tube portion was processed to have a thickness of 1 mm so that the overall diameter was 40 mm and the core diameter was 38 mm. Then, the core part is cut (bored) and processed so that the thickness of the inner tube becomes 5.5 mm, and the final dimensions (inner tube: outer diameter 19.76 mm, inner diameter) are obtained by pipe rolling. A pipe material having a double structure of 19.00 mm (thickness 0.38 mm) and outer pipe: thickness 50 μm was used. In the processing steps after the above pressure welding, there was no deviation or peeling between the gold alloy and the silver alloy.

  The specific gravity of the manufactured pipe material was 10.3. This is lighter than the specific gravity (13-23) of K14, which is a conventional pipe material. FIG. 1 is a cross-sectional photograph of the manufactured pipe material (the lower photograph is an enlarged cross-section). It was confirmed that the pipe material manufactured in this embodiment was processed with a uniform thickness for both the outer tube and the inner tube.

  Further, the tone pipe was processed to produce a pipe which is a flute part of the manufactured pipe material. In the tone hole after processing, the presence of the copper alloy in the inner tube was not confirmed.

The cross-sectional photograph of the pipe material manufactured in this embodiment.

Claims (7)

A pipe material for a wind instrument comprising an outer tube and an inner tube in contact with the outer tube,
The outer tube is made of K18 or K14 carat gold alloy,
The inner tube is a pipe material for wind instruments made of a copper alloy of 18 to 48.5% silver, 1 to 4% palladium, 0.5 to 3% indium, and the balance copper. The pipe material for a wind instrument according to claim 1, wherein the inner tube has a thickness of 0.25 to 0.4 mm, and the outer tube has a thickness of 0.03 to 0.2 mm. A method for manufacturing a pipe material for a wind instrument according to claim 1 or 2,
The core material made of the material constituting the inner tube is inserted into the pipe made of the material constituting the outer tube, and both are pressed.
A method of manufacturing a pipe material for a wind instrument that cuts the core material to make it hollow. The method of manufacturing a pipe material for wind instruments according to claim 3, wherein the pressure welding is a process of compressing the pipe and the core material. The method for producing a pipe material for a wind instrument according to claim 3 or 4, wherein at least one of the core material surface and the pipe inner surface is subjected to pressure contact after silver plating. The manufacturing method of the pipe raw material for wind instruments of any one of Claims 3-5 which makes thickness of silver plating 0.01-3 micrometers. The method for producing a pipe material for a wind instrument according to any one of claims 3 to 6, wherein the plastic working is performed after the pressure welding to obtain a predetermined inner diameter and outer diameter.

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