JPH10262511A - Member for guide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject member capable of simultaneously satisfying abrasion resistance, sliding properties and manufacturability and especially sufficiently improving the sliding properties by regulating the surface roughness of a substrate formed into a specific shape so as to afford specific conditions and forming a diamondlike carbon film having a specified thickness on the surface thereof. SOLUTION: This member for guide is obtained by forming a diamondlike carbon film 13 having 0.5-10 μm thickness through a bonding middle film having preferably <=0.3 μm thickness (silicon or silicone carbide or titanium carbide) on the surface of a substrate 11, formed into a prescribed shape and having <=3.0 μm center line average height (Ra ) (e.g. titanium or a titanium alloy). A sandblasting method, a barrel polishing method, an electropolishing method, etc., can be applied to the polishing of the surface of the substrate 11 into the above state. A plasma chemical vapor deposition(CVD) method, an ionic vapor deposition method, a sputtering method, etc., can be applied to the formation of the diamondlike carbon film 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a guide member. Various guides for guiding a yarn or a cloth are used in a textile machine. Various guides for guiding a fishing line are used for fishing gear. Further, various guides for guiding the tape are used in electric or electronic equipment. These guides use various types of guide members that come into direct contact with and guide the thread, cloth, or tape. By its nature, the guide member has abrasion resistance, and a yarn that runs in direct contact with it,
It is required that the cloth or tape (hereinafter, referred to as a running material) be not adversely affected, but the thread or the cloth or tape are made extremely thin, and the speed of these is increased. In recent years, such demands have been further strengthened. The present invention relates to a guide member meeting such recent strong demands.

[0002]

2. Description of the Related Art Conventionally, a metal product or a ceramic product molded into a predetermined shape has been generally used as a guide member as described above (JP-B-52-48647, JP-A-57-102472, JP-A-57-102472; -271739). However, such a guide member has disadvantages such as poor wear resistance and low slidability. If the wear resistance is poor,
If the frequency of replacement of the guide member increases and the sliding property is low, the generated frictional heat impairs the quality of the traveling material, and in some cases, cuts the traveling material.

[0003] Therefore, as an improved guide member, there has been conventionally proposed a metal member or ceramics product formed into a predetermined shape as a base material, and a diamond film formed on the surface of the base material (particularly). Kaihei 7-32279
6). However, although this guide member has an advantage that the wear resistance is correspondingly better than the case where the base material is used as it is, when a diamond film is formed on the surface of the base material by a CVD method or the like, the surface of the film is reduced. Since the running material is cut in a short time if it is covered with sharp projections of axially crystallized diamond, it is necessary to apply a surface treatment to smooth the diamond film after it is actually formed. However, there is a disadvantage that it takes time to manufacture.

[0004]

The problem to be solved by the present invention is that the conventional guide member cannot simultaneously improve the wear resistance, the slidability and the manufacturability, and especially the slidability. Is insufficient, and as a result, the running material is adversely affected.

[0005]

Means for Solving the Problems The inventors of the present invention have studied to solve the above-mentioned problems, and as a result, a metal product or a ceramic product molded into a predetermined shape is used as a base material. It has been found that a surface roughness adjusted to a predetermined value or less and a diamond-like carbon film formed on the surface with a thickness in a predetermined range is correct and suitable.

That is, the present invention provides that a diamond-like carbon film having a thickness of 0.5 to 10 μm is formed on a surface of a base material having a center line average roughness (Ra) of 3.0 μm or less formed into a predetermined shape. The present invention relates to a characteristic guide member.

The base material formed into a predetermined shape can be obtained by forming and subsequently sintering or firing, forging, machining, or the like using a metal material or a ceramic material.
To make the surface of the base material have a center line average roughness (Ra) of 3.0 μm or less, preferably 0.3 μm or less, a sand blast method, a barrel polishing method, an electrolytic polishing method, or the like can be applied. Center line average roughness (Ra) 3.0 μm or less, preferably 0.3 μm
On the following substrate surface, a thickness of 0.5 to 10 μm, preferably 1
In order to form a diamond-like carbon film having a thickness of about 8 μm, a plasma CVD method, an ionization vapor deposition method, a sputtering method, or the like can be applied.

An important point in the present invention is that a center line average roughness (Ra) of not more than 3.0 μm and a thickness of 0.5 to 1
It is where a diamond-like carbon film of 0 μm is formed. Only when the center line average roughness (Ra) of the substrate surface and the thickness of the diamond-like carbon film are set as described above, the characteristics of diamond-like carbon as the surface film of the guide member come to life. Unlike diamond-like octahedral, dodecahedral, and hexahedral axial crystallization, diamond-like carbon is amorphous in which graphite and diamond coexist. Therefore, there is no grain boundary on the film surface and the film is smooth. No subsequent surface treatment is required. Further, the wear resistance and the heat transfer property are almost equal to those of the diamond film.

When the base material is made of titanium or a titanium alloy, the obtained guide member becomes lighter. When this is used for fishing line, for example, the tip of a fishing rod can be made lighter. Can be used. Further, titanium is excellent in corrosion resistance, so it does not rust and is easier to process than ceramics.

It is preferable to form an adhesion intermediate film between the substrate and the diamond-like carbon film in order to improve the adhesion between the two. Particularly, a titanium or titanium alloy substrate and the diamond-like carbon film are preferably used. It is preferable to form silicon, silicon carbide (SiC) or titanium carbide (TiC) as an intermediate film between the layers. Silicon carbide and titanium carbide are easily compatible with titanium or titanium alloy substrates, and are also compatible with diamond-like carbon coatings. This is the same because silicon carbide is easily formed as a result when forming the silicon carbide. When forming an intermediate film for bonding, the thickness is set to 0.3 μm or less, preferably about 0.1 μm. This is because the slidability of the obtained guide member with respect to the traveling material is improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view illustrating a guide member according to the present invention, FIG. 2 is a perspective view illustrating a guide using the guide member of FIG. 1, and FIG. It is sectional drawing which shows a member. The guide member shown in FIGS. 1 and 3 is a fishing line guide ring 1 used for a fishing line guide, and as shown in FIG. Has become. In an actual use state, the fishing line 5 passes through the inside of the guide ring 1 and slides inside the guide ring 1 to travel. The guide ring 1 is obtained by forming a diamond-like carbon film 13 on the surface of a base material 11 formed in a ring shape. The base material 11 is obtained by sintering a titanium alloy by metal injection molding and sintering the surface of the base material by electrolytic polishing so that the center line average roughness (Ra) becomes 1.0 μm. Like carbon film 13 is formed by a plasma CVD method so as to have a thickness of 2 μm.

Table 1 shows a fishing line when the thickness of the diamond-like carbon film is 2 μm and the center line average roughness (Ra) of the substrate surface is changed in the guide ring as described above with reference to FIGS. 7 illustrates the results of a heating test as an index of slidability for. Table 2 shows the results of the same heating test when the center line average roughness (Ra) of the base material surface was set to 1.0 μm and the thickness of the diamond-like carbon film was changed in the same guide ring. Is what you do. Table 1
And, in Table 2, Test Examples 1 to 6 and 9 to 12 correspond to the present invention. From these tables, the center line average roughness (Ra) of the substrate surface is set to 3.0 μm or less, In addition, the thickness of the diamond-like carbon film is 0.5 to 10 μm.
It is understood that the value of m is important for improving the slidability of the guide ring.

[0013]

[Table 1]

[0014]

[Table 2]

In Tables 1 and 2, the heating test and its conditions were carried out according to the method described in Japanese Patent Application Laid-Open No. 4-271739.
No.5.0 ", load = 3kg, stroke length = 300mm, stroke time = 1 reciprocation / 3 seconds

FIG. 4 is a cross-sectional view illustrating another guide member according to the present invention. The guide member of FIG. 4 is also a fishing line guide ring as in FIGS. 1 and 3, but the guide ring 1a of FIG. A diamond-like carbon film 13a is formed through the film. The base material 11a is obtained by forging titanium, and adjusting the surface roughness of the surface by electrolytic polishing so that the center line average roughness (Ra) becomes 0.5 μm.
a is formed by a sputtering method so as to have a thickness of 0.1 μm, and the diamond-like carbon film 13a is formed by a plasma CVD method so as to have a thickness of 1.5 μm. .

FIG. 5 is a cross-sectional view illustrating another guide member according to the present invention. The guide member in FIG. 5 is a guide pin 1b for a fiber yarn in a spinning factory, and has a diamond-like carbon film 13b formed on the surface of a base material 11b whose outer peripheral surface is formed into a cylindrical shape as a whole constricted surface. is there. The base material 11b is obtained by casting a titanium alloy, and adjusting the surface roughness of the surface by electrolytic polishing so that the center line average roughness (Ra) is 1.0 μm. The diamond-like carbon film 13b is It is formed by a plasma CVD method so as to have a thickness of 1 μm. The illustrated guide pin 1b is axially supported by the machine frame, and the fiber thread slides on the constricted surface of the outer peripheral surface on which the diamond-like carbon film 13b is formed.

FIG. 6 is a cross-sectional view illustrating another guide member according to the present invention. The guide member shown in FIG. 6 is a fiber yarn guide tube 1c in a spinning factory, and has a diamond-like carbon film 13c formed on the surface of a base material 11c formed into a tubular shape as a whole with a trumpet on the inlet side. The base material 11c is obtained by grinding a titanium alloy, and adjusting the surface roughness of the surface by electrolytic polishing so that the center line average roughness (Ra) becomes 1.5 μm. The diamond-like carbon film 13c is It is formed by a plasma CVD method so as to have a thickness of 2.0 μm. The illustrated guide cylinder 1c is attached to a machine frame, and the fiber thread slides on the inner peripheral surface on which the diamond-like carbon film 13c is formed.

The present invention can be implemented in various ways without departing from the scope of the present invention. For example, the intermediate film for adhesion may be any material such as SiC other than silicon, as long as it improves the adhesion between the substrate and the diamond-like carbon film. The substrate may be made of stainless steel, ceramics, or the like in addition to titanium or a titanium alloy. A guide member similar to the guide member described with reference to the drawings is used as a guide member for a fishing line attached to a tip of a fishing rod, and a guide member for a line or a cloth in various textile machines such as a liner, weaving, and knitting. Needless to say, it can be further used as a tape guide member in electric and electronic devices.

[0020]

As is clear from the above, the present invention described above has an effect that the improvement of wear resistance, slidability and manufacturability can be simultaneously satisfied, and especially the slidability can be remarkably improved.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a guide member according to the present invention.

FIG. 2 is a perspective view illustrating a guide using the guide member of FIG. 1;

FIG. 3 is a sectional view showing the guide member of FIG. 1;

FIG. 4 is a cross-sectional view illustrating another guide member according to the present invention.

FIG. 5 is a cross-sectional view illustrating another guide member according to the present invention.

FIG. 6 is a cross-sectional view illustrating another guide member according to the present invention.

[Explanation of symbols]

1, 1a: guide ring, 1b: guide pin,
1c: guide cylinder, 11, 11a to 11c: base material, 12a: silicon film, 13, 13a to 13c
... Diamond-like carbon film

Claims (4)

[Claims] 1. A substrate having a center line average roughness (Ra) of 3.0 μm or less and having a thickness of 0.5 to 10
A guide member having a μm diamond-like carbon film formed thereon. 2. The guide member according to claim 1, wherein a diamond-like carbon film having a thickness of 0.5 to 10 μm is formed on the surface of the base material via an adhesive intermediate film having a thickness of 0.3 μm or less. 3. The guide member according to claim 1, wherein the base material is titanium or a titanium alloy. 4. The guide member according to claim 2, wherein the base material is titanium or a titanium alloy, and the bonding intermediate film is silicon, silicon carbide or titanium carbide.