JPS6084477A - Slidable member which possesses heat-resisting performance and preparation thereof - Google Patents

Abstract

PURPOSE:To improve the heat-resisting performance of a slidable member by combining a multilayer member constituted of a solid lubricating layer and a sheet member reinforced by a net formed by braiding the both of thin metal wires and fluorine contained resin yarn, integrally with a basic member. CONSTITUTION:A multilayer member having a solid lubricating layer 6 is formed by applying a heat-resisting sheet 5 onto one surface of a sheet member 4 made of heat-resisting material and applying powdered solid lubricating material. Said multilayer member is superposed onto a net constituted of thin metal wires 8c as reinforcing member and fluorine contained resin 9c, and a slidable- surface layer formed member 11 is obtained. Then, said slidable-surface formed member 11 is wound or fitted onto the outside or inside of a cylindrical basic material 3 constituted of the heat-resisting material such as expandable graphite, etc. and a stainless-steel net, and thus an assembly body is obtained.

Description

[Detailed description of the invention] The present invention relates to a manufacturing method thereof.

Here, the "heat-resistant sliding member" used in the present invention means that it can withstand temperatures at which it is difficult to apply the commonly used lubricant No. 14. In addition to these fl t5, members that can support the load N with a low coefficient of friction and also have a sealing function, such as bearing bushes 7, seals, sliding plates, contact type packings, etc. It refers to something like that.

Conventionally, this type of sliding member has been made of metal materials made of stainless steel or copper alloy with embedded solid lubricant pellets;
Composite materials such as cermet, or materials made of heat-resistant plastic materials such as tetrafluoroethylene resin (TFjii) and polyimide resin are known.

However, although these materials have excellent heat resistance, they may have problems with friction and abrasion under dry IM conditions, and may have problems with mechanical strength, especially impact resistance. There have been problems such as there are some spots, the compatibility with the mating material is not necessarily good, and the function cannot be fully demonstrated with respect to microslips.

In order to solve such problems, for example, as disclosed in U.S. Pat. It has been developed to manufacture sliding parts by molding g-tensioned graphite together with reinforcing materials.This sliding part has heat resistance, excellent compatibility with mating materials, Although the impact strength has been significantly improved compared to ordinary graphite, the friction coefficient is rather poor compared to ordinary graphite, and in addition, abnormal friction noise is often produced during excitation during dry friction. The disadvantage is that it occurs.

In addition, sliding members obtained by molding heat-resistant materials such as mica and asbestos together with reinforcing materials are also known.
These also have similar problems.

This is due to the large difference between the static friction coefficient and dynamic friction coefficient of these heat-resistant materials, and the fact that sliding members made of such materials have some flexibility. It is thought that there is a reason for this.1 Furthermore, it is thought that the shape of each member constituting the shearing system and the natural vibration of the material also have an influence.

In order to solve the above-mentioned problem, the applicant has already filed a patent application No.
5-A'-, zqbkog-rf> (hereinafter referred to as "conventional technique") and special request! 7-/da09g7 issue (hereinafter referred to as “
There have been four inventions of heat-resistant sliding members (referred to as "prior art"). Here, the above-mentioned prior art and prior art will be briefly explained as follows.

In other words, the conventional technology is based on materials such as expanded graphite, mica, and asbestos.
A molded material obtained by mixing seeds or more than one seed and molding the weather-resistant material together with a reinforcing material consisting of metal fibers, fine metal wires, or a net obtained by weaving or knitting these. This is a sliding member in which a lubricating composition consisting of a tetrafluoroethylene resin or a copolymer of tetrafluoroethylene and macrofluoropropylene is coated on the front surface of the material.

Further, the prior art discloses any one or more of the heat-resistant materials in the group consisting of expanded graphite, mica, and asbestos! Asbestos, carbon (excluding expanded graphite), and glass are added to the surface of the base material obtained by molding a sheet material made of a combination of two or more of However, in the above-mentioned prior art, a heat-resistant sheet made of any of seven or more types of fibers coated with a powdered solid lubricant composition is layered on a mesh of fine copper alloy wires. The lubricating composition adhered to the surface of the base material of the moving body exhibits low friction properties during frictional sliding with the mating material, especially in the initial stage of friction, resulting in low dynamic frictional resistance and no abnormal friction noise. Although it showed extremely good performance,
It has been discovered that when the temperature rises, the lubricating composition softens and flows, falls off the surface, and transfers to friction with the heat-resistant material of the base material of the moving body, causing abnormal friction noise.

In addition, in the prior art, as a result of implementation, the shearing surface layer showed the performance of producing less abnormal friction noise and good wear resistance during frictional movement with the mating material, but in the initial stage of friction. In other words, at the stage until the solid lubricant composition of the sliding surface layer is formed as a solid lubricant film on the surface of the mating material, the sliding dynamic frictional resistance (friction coefficient) is affected. New problems have been discovered, including the occurrence of abnormal fricative noise due to ζJ.

By the way, among the problems of the prior art described above, the generation of shear dynamic friction resistance and abnormal friction noise at the initial stage of friction can be solved by using tetraethylene ethylene resin (PT) in the solid lubricant composition.
This can be reduced by increasing the blending amount of FIn) and increasing the proportion of FIn exposed on the surface of the shearing surface layer.

However, when a large amount of P T F'ffl is blended, P T F'K is present at the bonding interface of other solid lubricant particles, and this causes inhibition of bonding between the solid lubricants. This causes several problems due to thermal expansion and softening of FTPK, especially in high temperature regions.

In other words, in a high temperature region, the bonding force between solid lubricants is weakened due to thermal expansion and softening of pTFK present at the interface of solid lubricant particles, causing swelling in the shearing surface layer, which reduces shearing motion. In addition to the above, the softening flow of FTFB occurs together with the solid lubricant composition during frictional excitation, and the moving surface layer falls off from the base material surface. Similar to the prior art described above, there are problems such as friction between the heat-resistant matrix material (expanded graphite, etc.) and the mating material, which causes abnormal friction noise.

The present invention improves the above-mentioned prior art, takes advantage of the excellent shear dynamic properties of the solid lubricant composition in the prior art, and particularly solves the problems at the initial stage of IJ friction by improving the low friction properties of PTFE. An object of the present invention is to obtain a sliding member having heat resistance and a method for manufacturing the same, which can solve the problem by effectively utilizing the graphite, mica,
A base material obtained by molding a combination of any 7 types or 7 or more types of heat-resistant materials such as asbestos into a reinforcing material made of stainless steel mesh. Heat-resistant sheet material composed of fibers and any of seven or more of the following: asbestos, carbon (excluding expanded graphite), glass, etc. A multi-layered member consisting of a solid lubricant made of solid lubricant is superimposed on a net formed by co-weaving or co-weaving thin metal wires and a fluorocarbon resin, thereby reinforcing the sliding surface layer. It is formed into a flat/# surface made of thin metal wires and fluororesin threads that are combined and deformed to form an entangled mesh, and a solid lubricant filled and held between the mesh and the thin wires. It is characterized by a sliding member that is extremely heat-resistant.

As described above, the sliding member according to the present invention is made by co-weaving thin metal wires and fluorine resin threads on the surface of a base material in which a heat-resistant material and a reinforcing material made of a stainless wire mesh are integrated. A feature is that a multi-layered member consisting of a heat-resistant sheet material reinforced by a co-knitted net and a solid lubricant layer is integrally bonded to a base material.

In other words, a heat-resistant material such as expanded graphite is uniformly filled into the mesh of a wire mesh made of stainless steel as a reinforcing material and the gaps between the fine wires that make up all of it, and the reinforcing material itself is compressed and deformed. However, the homogeneous lubricant, which is reinforced by a network of thin metal wires and fluororesin threads arranged on the narrow side of the base material, is also intertwined with each other. The mesh of the mesh and the gaps between the thin wires and threads that make up the mesh are filled uniformly, and the reinforcing material made of this mesh not only deforms and becomes intertwined with each other, but also the reinforcing material of the base material. The base material and the sliding surface layer are also intertwined with a reinforcing material made of stainless steel wire mesh, and the base material and the sliding surface layer are integrally bonded.

In this way, the surface of the sliding surface layer, which is integrally bonded to the base material, has a mixture of thin metal wires and fluororesin threads constituting the net and solid lubricant reinforced by this net at a certain ratio. Because of the structure, the low friction properties of the fluororesin are exhibited at the initial stage of friction of the sliding member, and the dynamic frictional resistance with the mating member is significantly reduced, and abnormal frictional noise is no longer generated9. The HL/1-body lubricating film that is formed during water excitation has excellent film-forming ability (that is, the self-repairing function of the film is readily available when the film is broken), and it also has excellent resistance to microgrooves and small angles. Next, the method for manufacturing the sliding member of the present invention, which has the above-mentioned structure, is a method for manufacturing a sliding member that is suitable for use in swinging applications. It is characterized by standing.

In other words, (a) one sheet-like heat-resistant sheet material such as an expanded graphite sheet and a stainless steel wire mesh as a reinforcing material are layered together, and these are wound in a thin spiral, or the wire mesh is knitted in a bag. Then, a heat-resistant material sheet is placed inside the bag-like wire mesh that has been flattened into a belt shape, and these sheets are wound together in a thin spiral to form a cylindrical base material.

(b) Prepare a heat-resistant material sheet separately, paste a heat-resistant sheet material made of fibers such as asbestos on one surface of this sheet, and then cover the surface of the heat-resistant sheet material with a powdered solid lubricant. (c) Layer the multilayer member on a net formed by co-weaving or co-knitting thin metal wires and fluororesin threads, or The net is made of bag knitting, the bag-like net is flattened into a belt shape, and a moving surface layer forming member is formed in the belt. An assembly is prepared by winding the sliding surface layer forming member obtained in step (c) on the surface of the base material so that the solid lubricant layer appears on the surface.

(E) A sliding member is obtained by compressing this assembly from the axial direction of the cylindrical base material, deforming the mesh, and causing entanglement in the mesh between the layers.

The material composition and molding technology of the heat-resistant material and reinforcing material described above are disclosed in Japanese Patent Application Laid-Open No. 5-118-76-S? This method utilizes the technology disclosed in Japanese Patent Application Laid-open No. 2003-120002 and Japanese Patent Application Laid-Open No. 2003-290016.

Hereinafter, the unexploded 8A will be explained in detail based on FIGS. 1 to 72 of the accompanying drawings.

The sliding member according to the present invention is manufactured through steps (a) to (e) as described above, and each step will be explained in detail first.

(b) A process for obtaining a cylindrical base material by layering a heat-resistant material made of expanded graphite or the like on a reinforcing material made of a stainless steel wire mesh and winding them together to form a cylindrical base material. Figure 1 shows this process. The first is a perspective view showing a state in which sheet-shaped expanded graphite l as a heat-resistant material and stainless steel wire mesh as a reinforcing material are stacked on top of each other. In addition, Fig. 2 shows, as the second step, a cylindrical base material obtained by winding the state shown in Fig. 1 obtained in the first step in a thin spiral with the heat-resistant material inside. 3.

FIG. 3 shows a variation of the process shown in FIGS. 1 and 1, in which a sheet of expanded graphite is wrapped around the outer periphery of a bag-knitted stainless steel wire mesh 21 and covered with one end. The figure shows the cylindrical base material 3' being rolled up in the axial direction.
When the winding method shown in FIG. 3 is adopted, the three cylindrical base materials obtained will have the wire mesh 21 located on both the inner and outer peripheries.

On the other hand, if the winding method shown in Fig. 1 is adopted, the second
As shown in the figure, a heat-resistant material 1 is located on the inner periphery of the cylindrical body 3v, and a wire mesh Y is located on the outer periphery. However, if the one shown in FIG. 1 is wound with the heat-resistant material l entirely on the outside, a wire net is placed on the inner periphery and the heat-resistant material l is placed on the outer periphery. In addition, in the overlapping structure shown in Figure 1, if a heat-resistant material is used that is longer than the longitudinal direction (winding direction) of the wire mesh, the heat-resistant material is located on both the inner and outer peripheries. It is also possible to obtain a cylindrical base material.

Next, Figure S shows the bag-knitted wire mesh 21 shown in Figure 3.
This figure shows another example of a base material in which a sheet-like heat-resistant material 1 is placed inside a strip formed by crushing it in the radial direction. In this case, if the length of this band-shaped wire mesh 2I is the same as the length of the heat-resistant sheet l, the cylindrical base material obtained by winding this will have a shape in which the wire mesh is placed on both the inner and outer peripheries. You can get something.

Next, each of the two main materials used in this process will be explained in some detail.

In this process, the heat-resistant material used to make the cylindrical base material 3, 3I is made of one or more of the group consisting of expanded graphite, mica, and asbestos, or a combination of two or more of these. It is something.

As the expanded graphite, expanded graphite powder manufactured by Union Carbide Co., Ltd. in the United States disclosed in Japanese Patent Publication No. 23966-23966 and a sheet manufactured from this powder are effectively used.

As the mica, natural or artificial mica powder, or mica paper made by bonding the powder of Ton et al. with a silicone resin is suitable.

As for asbestos, chrysotile or amosite fiber powder, asbestos paper or sheet made of these powders, etc. are effectively used.

In addition, the stainless steel that forms the wire mesh as a reinforcing material is
Austenitic 03US? θda.

A wire mesh obtained by weaving or knitting fine wire such as 5USj/4 or ferritic SUB Hiro 30, particularly a braided wire mesh, is most preferable.

The wire diameter of this Itoyama gland is 0, /-0,! ; 41+!
% The i-th column can be exemplified as the most preferable one having 3 to 6 elbows.

(b) Prepare a sheet of heat-resistant material separately, paste a heat-resistant sheet made of fiber (such as asbestos) on one surface of this sheet material, and then apply powder to the surface of the heat-resistant sheet. Figure 6 shows the process of obtaining a multi-layered structure in which a solid lubricant layer is formed by depositing a solid lubricant layer of
Attach one loaf of heat-resistant sheet to one surface of the plate.
15 and 1. adhered to the surface of the sheet material S. FIG. 7 is a diagram showing a multilayer member 7 consisting of an integral rib lubricant layer 6, and FIG. 7 is an enlarged view of its cross section.

Next, each of the main materials used in this process will be explained in some detail.

In this process, the heat-resistant material C44 is selected from among the above-mentioned expanded graphite, mica, asbestos, or a combination of two or more of these. Ru.

The heat-resistant sheet material S is made of asbestos, charcoal, '/S (expansion 51
Suitable materials include paper, nonwoven fabric, or i-type surface made of glass (1271 potash, alumina, silica, soda glass, etc.) or fibers of 2411 or higher (excluding graphite). The 0' solid lubricant layer 6, whose thickness is approximately in the order of O, OS to 8, particularly preferably Oo- to 0+ATnm, includes: (1) Metal sulfides: HdB, , WS, , 5b2
S, , PbS, Fe5(11) graphite flaky graphite, etc. However, excluding expanded graphite (), BN (m) Copper or copper alloy: (!u, A10u-4<Fe
-5Mn, brass, bronze (1v) Metal fluoride: OaF2. BaF2. L
In each group of iF, (+), (it), (+) and 1), (1) and (11) and (m), (1) and (
11) and Qll) and Qv), (1) and (lii),
(It) and Qtl), (li) and (lii) and (lv
), (n) and (lv), particularly preferred embodiments are shown in Table 1.

Table l The powders shown in each of these groups are used in the form of fine powders, approximately finer than 100 mesh.

Among these combinations, when using the (it group), it is effective to use the (1v) group in addition.

Also, the one shown in the (+V) group is 17 dollars
Although it is not a particularly low-friction material, when used in combination with the substances shown in Group 1, it completely prevents oxidative wear and tear at temperatures above 200°C and contributes to maintaining lubricity.

(Although the copper and copper alloy powders shown in Group 1 cannot be said to be solid lubricants themselves, by mixing them with solid lubricants from other groups, the hardness can be improved by 4jl in general terms. This function adjusts the supply of solid lubricant to the demon surface and narrows the difference between the static friction coefficient and the dynamic friction coefficient, contributing to the prevention of abnormal CX friction noise.

Then, adhesive is applied thinly to both surfaces of the heat-resistant sorting material 5 mentioned above, and the surfaces of the heat-resistant sorting material qV'i and -10,000 are glued 11 onto the heat-resistant sorting material q. At the same time, solid lubricant powder of the desired composition is sprinkled on the other side to form a solid lubricant layer 6, and then, by assimilating the adhesive, the heat-resistant material 7-to-material q and , a composite member in which the heat-resistant sorting material S and the solid lubricant layer 6 are integrated is formed.

Note that the adhesive used here does not need to be able to withstand daytime temperatures of several hundred degrees Celsius. In other words, the adhesive may be applied at the stage of manufacturing the sliding member or during normal handling such as IQ testing, packaging, transportation, and assembly of the sliding member. It is sufficient that the solid lubricant layer 6 does not peel or fall off, and has an adhesive strength that does not easily peel off from the matrix surface due to load or slippage during use.

In addition, adhesives used in this case include epoxy resin, phenol resin, and polyimide resin (polyamide resin).
(including imide resin), polyvinyl alcohol It fI
Ingredients such as W, corn syrup, T labia gum, glue, alginates, etc. can also be used.

Alternatively, instead of spraying all the solid lubricant powder onto the side heating sheet S coated with adhesive, a mixture of solid lubricant powder and adhesive may be used. Mix the powder, grafting agent, and solvent to form a slurry.
A paste may be applied thinly onto the heat-resistant sheet material S.

In addition, a powdered solid lubricant is dispersed in an appropriate dispersion medium and applied onto the heat-resistant sheet material S, or after application, pressure is applied to fill the gap in the heat-resistant sheet material S. It is also preferable to apply the solid lubricant particles to the surface of the heat-resistant sheet S as N!f-. This is particularly effective in cases where the particles are sufficiently fine and have a tendency to coagulate with each other after the above-mentioned coating and impregnating process.

(・) Lay the multilayer member obtained through Step 8 of (B) above on a net consisting of a reinforcing material, thin metal wires 1 to 1, and fluorine I↑ fat thread, and transfer the sliding surface N1. In the step g1 of obtaining a forming member, a multilayer part A is placed inside a band-shaped MIO' obtained by crushing in the radial direction a bag-like net made of a set of fine metal wire gc and fluororesin thread 9C. ' 7 k This figure shows a sliding surface layer forming member formed by humans.

In addition, FIG. 9 shows a sliding surface layer forming member tt'f in a cylindrical body, which is convenient when the whole is wound in a thinly wound shape and combined with a cylindrical base material, in a perspective view. It is something.

This sliding surface layer forming member of the cylindrical body is normally wound in a single layer with the ends slightly overlapping at the beginning and end of the winding, but in some cases, it may be wound more than twice to form a cylinder. It can also be used as a shape.

Here, each of the various materials used in this step will be explained in some detail.

In this process, the net 10° consisting of the gold layer as a reinforcing material, a thin layer, and a fluorine resin thread has the following configuration.

The most suitable thin metal wire is selected depending on the purpose and application, but in particular, stainless steel wire is used as iron-based metal wire, and brass, nickel silver, beryllium bronze, and phosphor blue 414 are used as copper alloy-based metal wire. , cupronickel, etc. are used, and alumina 0 alloy thin wire may also be used.

For normal applications, fine copper alloy wire has been used; under high-temperature or corrosive atmosphere conditions, stainless steel fine wire or cupronickel fine wire, etc.; Thin alloy wires are recommended.

The wire diameter of these fine metal wires is about .theta./-0.3-, which is most suitable for forming a net layer and for application to shearing of shearing parts. In other words, if the net is too thin, it will not only increase the manufacturing difficulty when making the net, but also cause the sliding surface on the moving part side to become weak. This is because not only is it difficult to move, but also the smoothness of the sliding surface is impaired.

Next, fluororesin threads include tetrafluoroethylene resin threads,
It is a thread made of tetrafluorinated ethylene/hexafluorinated propylene copolymer, and may be either a single thread or a spun yarn, but in combination with a thin metal wire having the above-mentioned wire diameter, it is generally 200~/
, 200 denyl is preferred.

Furthermore, the following two methods can be considered to combine this thread with a thin metal wire.

A Method for making a woven net (see Figure 10) Warp wire (as the warp thread J, a pair of thin metal wire gth and fluororesin thread ?a is used as elffi, and as the weft wire (horizontal thread), Similarly, a set of thin metal wire gb and fluororesin thread q1) is used, but both may be used as vertical wire and horizontal wire, respectively, and used separately. (See FIG. 10) The thin metal wire gc and the fluororesin thread 9C are knitted together into a bag shape (the figure shows a developed view). In addition, in the dog net, is it fluororesin thread? Even when C is supplied to the braiding machine under the same conditions as the thin metal wire gc, it is under tension and exists between the meshes of the thin metal wire ga.

Also, the network lθ, 101 created by such a method
The size of the mesh is usually in the order of 3 to 6, but here, [mesh j is fine metal wire ga + g b + l
The entire dimension between c. In this case, if the mesh is made too large, the compression ratio will increase during winding and compression molding, resulting in a problem with the mold capacity. On the other hand, the entanglement of fine wires after compression molding (golden plate) and compression molding may cause opacity, which tends to cause directionality in the molded product, which may cause problems such as no cracking. It's not good because there is.

In addition, thin metal wires ga, gb, gc and fluororesin thread 9a
,? Various combinations of b and 9c are possible, such as one thin metal wire and one fluororesin thread, or one thin metal wire and two water threads.

In this way, the mesh lθ, 10′ formed by co-weaving or co-knitting the metal wire, fluororesin thread and gold,
The sliding surface layer forming member is formed by reinforcing the multilayer member described above.

(d) The outside of the cylindrical base material 3 obtained by the step (a) of winding the sliding surface layer forming member onto the cylindrical base material, or
As a winding process for obtaining an assembly in which the sliding surface layer forming member l/ obtained in Step 2 (c) is wound or fitted inside, the following embodiments can be considered.

That is, (7) the multi-layer member 7 is placed inside the band-shaped M10' obtained by crushing in the radial direction a net made of thin metal wire gc and fluororesin thread 9c formed by bag-knitting, and the multi-layer member 7 is The method of wrapping the hard lubricant layer 6 side around the base material 3 is similar to the method of wrapping the layered member 7 around the base material 3 by wrapping the thinly wound strip net IO'f around the base material 3. Insertion method: 0) The method of (1) above, in which the multi-layered part 7 is placed inside the belt-like net lθ゛, or the multi-layered member 7, in which the net is placed on the soil, is applied by all rolls. Press,
A method of wrapping the multi-layer member 7 and the net to', which have been strongly attached and integrated, around the base material 3 so that the solid @ lubricant layer 6 is located in the external field 1j, trunk) Simply (above fllO2lO1) Various methods are adopted, such as superimposing the multilayer parts on top of each other and winding the multilayer member 7 around the base +4.! with the multilayer member 7 positioned on the outside.

The multi-layer raid 7 and the nets 10, 10' are set in advance by UI1.
Compared to the method @ of applying one pressure and applying pressure without blm (1), the solid lubricant that appears on the surface of the sliding member obtained through the next compression process is 6 and net 10. There is a special skill that /θ1 is 11 so.

(e) In compression process step 8 (d), the nets io, io' and the nets io, iθ
A sliding surface layer forming member consisting of a multi-layer member 7 reinforced by The assembly formed by wrapping around or fitting into the mold is then placed in a mold and compressed in the axial direction to form the finished product.

The molding pressure in this case is preferably /~3t/cIn2.

FIG. 12 shows, as seven examples, the sliding surface layer forming member iy'f shown in FIG. 11 around the cylindrical base material 3 shown in FIG.
This is a perspective view of a sealed bearing obtained by putting the assembly made by fitting into a mold and compressing it in the axial direction, in which l' is a heat-resistant material;
12 is a sliding surface forming a partial spherical surface. Moving surface 1
2 is network IO? : The constituting thin metal wires gC and the fluororesin threads C are deformed and exposed in spots, and the solid @preparation is exposed between the meshes.

The area ratio of the metal part, fluororesin part, and solid lubricant part appearing on the surface of the sliding member made through this compression process is as follows: gold pAs lθ ~ 30cm, fluororesin portion io ~ 30cm %, solid lubricant portion lIo-go%.

This area ratio is: fll Wire diameter of the thin metal wire (2) Number of combinations of fluororesin threads to the thin metal wire (3) Denier number of the fluororesin thread (4) Cross-sectional shape of the fluororesin thread (5) Difference between yarn and spinning (6) If spinning, the number of filaments,
Twist strength (7) It varies greatly depending on the molding pressure when molding the sliding member.

For example, even if the single yarn and the spun yarn have the same denier number, is it better to use the latter? r: The area ratio of the fluororesin portion is larger in the sliding member obtained by using.

This is because, apart from compression molding, "separation" occurs in the spinning yarn, but if the "separation" becomes noticeable, the welding surface becomes fluffy, so care must be taken. .

The request to change the area ratio of the fluororesin part can be met by keeping the wire diameter and molding pressure of the thin metal wire constant, and changing the denier of the fluororesin thread and the number of combinations. , is the most typical and recommended method.

/ To give an example, one thin metal wire with a wire diameter of 0.2 gmm is paired with (2) a θO denier PTFK single thread, two gold threads, and the third mesh is knitted into a bag shape? A belt-shaped net formed by crushing in the radial direction is used as a reinforcing material, and in this net, the above-mentioned ml so member (heat-resistant material sheet: expanded graphite, heat-resistant sorting: carbon paper, homogeneous lubricant layer: (1) in Table 1) )
+ (lit + (combination consisting of IID + (1ν))] is wound around the cylindrical matrix, and compressed at a pressure of 2.5t/n2 in the axial direction of the matrix. P T on the sliding surface of the molded sliding member
The area ratio occupied by the F'1 portion was approximately z, t%.

Here, the functions and effects of the fluororesin thread will be explained.

It is well known that fluororesin (especially PTFFi) has an extremely small coefficient of friction and is used as a solid lubricant like graphite and molybdenum disulfide. ) There is no difference between the static friction coefficient and the dynamic friction coefficient (b) "Negative mechanical resistance" which is exhibited by many other Punstic materials.
(The curve represented by the friction coefficient exhibits a negative slope with respect to an increase in friction speed), but also shows a behavior such as a positive slope (which can also be called % property).

These characteristics (a) and (b) do not cause "stick-slip" during wear, so L'? [jDo not cause abnormal noise.

In addition, in the case where fluororesin is placed on the moving surface in the form of a thread, compared to the case where the fluororesin is placed on the moving surface as a powder bed coating (the above-mentioned conventional technology), Excellent wear resistance.

This is because when applied in the form of thread, the fluorine and 4-fat molecules are oriented, so the strength is strong and has a favorable effect on abrasion resistance.

The sliding surface of the sliding member obtained through the steps (a), (b), (c), ii) and (e) above consists of fine metal wires constituting a mesh at a certain ratio, The fluororesin threads and the solid lubricant reinforced by this net are mixed, so the low friction properties of the fluororesin are exhibited at the initial stage of friction between the shearing member and the shearing dynamic friction with the mating member is reduced. The resistance is significantly reduced, and abnormal friction noise is more likely to occur. Furthermore, the solid lubricant film formed during excitation has excellent film-forming ability, exhibits excellent friction and wear characteristics even in high-temperature ranges, and does not generate abnormal friction noise.

In this case, the fluororesin threads exposed on the sliding surface may be those formed by coating the fluororesin of the prior art on the sliding surface, or the fluororesin of the prior art incorporated into a solid lubricant composition. Unlike conventional formulations, it solves the shortcomings of the conventional and prior art and exhibits excellent performance over a long period of time.

Next, performance tests were conducted on the shearing mechanism according to the present invention together with the prior art and prior art, and the results are shown in Table 2.

Test condition: Load weight skg/2 f Talking speed: 1.

Atmospheric temperature: yoo℃ Compatible material: 5US30q In addition, in Table 2, the value of the friction coefficient is 1 after the start of the test.
The wear amount is shown as the value after 20 hours from the start of the test.

The evaluation of abnormal fricative sounds in the table is as shown in -F below. In other words, evaluation symbol I: Only normal fricative sounds and no abnormal sounds.Evaluation symbol n: When the ear is brought close to the test piece, in addition to the fricative sounds, a faint abnormal sound can be heard.Evaluation symbol ■: Localization [1 (at a position /,!;m away from the test piece), it is generally difficult to identify because it is muffled by the sounds of the living environment, but it can be recognized as an abnormal sound by the test person Evaluation symbol ■: Abnormal sound that anyone can hear in a fixed position A sound that can be identified as a sound (unpleasant sound).

However, in Table 2, the prior art is the patent application mentioned above! ;7-/l
A sliding member made of the technology disclosed in No. 109g7,
Prior art ■ is a sliding member consisting of the technology disclosed in the above-mentioned Japanese Patent Application Sho St. 4j-7
This figure shows a sliding member made of the technology disclosed in Publication A759.

As can be seen from the test results in Table 2, the sliding member according to the present invention exhibits balanced performance when evaluated in terms of friction and wear amount.

On the other hand, the sliding member of Prior Art I showed an extremely low coefficient of friction at the initial stage of friction, but as the test progressed, part of the PTFIu covering 11i fell off, and the heat resistant part fell off as the test progressed. As a result of friction between the sliding material and the expanded graphite, an increase in abrasion 'yl, I' + k i @ engagement and generation of abnormal friction noise were observed. At the same time, flow occurs due to the softening of the PTFE in the solid lubricant layer, and a portion where the solid lubricant layer falls off from the top 11 is found. An increase in the coefficient and the occurrence of abnormal I9 fricatives were observed.

As described above, the present invention provides a heat-resistant sliding member and a method for manufacturing the same, which solves the problems in the prior art and the prior art.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 shows a state in which a sheet-like heat-resistant material and a stainless steel wire mesh, which constitute the entire matrix of a sliding member, are overlapped. , Fig. 2 is a perspective view of a cylindrical base material obtained by winding it with the wire mesh outside, and Fig. 3 shows a state in which a sheet-like high temperature material is wrapped around the outer periphery of the bag-knitted stainless steel wire mesh. Perspective view shown, zp
Figure II (is the one in Figure 3 from one end)
A perspective view showing a cylindrical base material obtained by rolling back in the line direction, the left figure shows the cylindrical base material obtained by crushing the bag-knitted wire mesh in the radial direction.
A perspective view showing a base material formed by inserting a sheet-like 1fIlj thermal material into this, 2→) 6 is a perspective view showing a multilayer member, and FIG. Figure 3g Figure j is
The multi-layered material is rolled out inside the belt-like net obtained by crushing the bag-knitted 1 and 14 shown in Fig. 11 in the direction of use.
! I■ A perspective view showing the layer formation layer, Figure 9 shows a cylindrical body obtained by winding the entire thin layer shown in Figure 5, and Figure 1Theta shows a thin metal wire. Tobutsu G resin-thread? Fig. 11 is a plan view of the net obtained by weaving, and Fig. 11 is a developed view of a similar net knitted with bags; be. ! ... Sheet-like heat-resistant material, 2+21... Stainless steel wire mesh, 3,3"... Cylindrical base material, l... Sheet-like heat-resistant material, 5
・・Heat-resistant sheet material, 4.・Solid 44゛J lubricant layer, 7.
・Multilayer member, ga (gb, gc - 4 river thin wire, qa,
9b, q(!...Furi resin thread, 10, /θ1 ・Net,
/l...The forming part of the moving surface layer is removed. Applicant: Oiles Industrial Co., Ltd. Men 3rd Ward Fan 4th Ward Bi 10ゝ Oni 12 Fig. 9'b Oni 11 Fig. I○.

Claims (1)

[Scope of Claims] l A material made of any seven or a combination of seven or more heat-resistant materials from the group of heat-resistant materials consisting of expanded graphite, mica, asbestos, etc., is integrated with a reinforcing material made of stainless steel mesh. A heat-resistant sheet material composed of one or more types of fibers such as asbestos, carbon (excluding expanded graphite), and glass is applied to the surface of the base material obtained by shaping the heat-resistant sheet material. A sliding surface layer made by reinforcing a multilayer member consisting of a solid lubricant layer adhered to the surface of the material and a net formed by co-weaving or co-weaving fine metal wires and fluororesin. The metal wires are joined together and the shearing surface is deformed to form an entangled network, which is formed into a smooth surface consisting of a fluororesin-based solid lubricant filled and held between the mesh and the wires. 1. A sliding member having heat resistance, characterized in that: The solid lubricant layer contains (1) metal sulfide, (11) graphite (excluding expanded graphite), boron nitride (ill
) Copper or copper alloy OV) Among each group of metal fragments, (+), (II), (1) and (I
I), (1) and (11) and Qil). (+) and (II) and (iil) and OV), (1) and (m), (If) and (lft), (II) and (
The heat-resistant sliding member according to claim 1, comprising a combination of any one of (lit) and (GV), (ll) and (lv). 3. Heat resistance according to claim 1, in which the thin metal wires constituting the net reinforcing the reinforcing member are made of a combination of seven or more types of stainless steel wires, copper alloy wires, aluminum alloy wires, etc. A sliding member having: The fluorocarbon resin that makes up the net that reinforces the multi-layered material is
The heat-resistant shearing member according to claim 1, which is made of a tetrafluoroethylene resin thread or a tetrafluoroethylene/hexoplypropylene copolymer system. S: The sliding surface is exposed at an area ratio of 10 to 30 inches of fine metal wire, 10 to 30 inches of fluorine resin thread, and 0 to 30 degrees of solid lubricant. A moving part with heat resistance. (b) A sheet material made of any seven or a combination of two or more of the heat-resistant materials consisting of expanded graphite, mica, asbestos, etc. is superimposed on a reinforcing material made of stainless steel rope.
Step (b) of obtaining a cylindrical matrix by wrapping the reinforcing material into a mesh of the reinforcing material after stacking the sheets. After applying a heat-resistant sheet made of fibers of seven or more types of asbestos, carbon (excluding expanded graphite), glass, etc. to the surface,
Step (c) of obtaining a multi-layer member in which a solid lubricant layer is formed by depositing a powdered solid lubricant on the surface of a heat-resistant sheet. The solid lubricant of the multilayer member is applied to the mesh by overlapping or overlapping the thin wire and the fluororesin thread on a mesh formed by Yuori 9 or co-knitting, or by pressing at right angles to the overlapping surface. (In the process of filling and obtaining a moving surface layer forming member) An assembly formed by winding a moving surface layer forming member around a cylindrical base material so that a solid lubricant layer appears on the surface. (e) Compressing the assembly in the axial direction of the cylindrical base material so that mutual deformation and entanglement of each set occur. Production method.