KR101910155B1 - Method for manufacturing surface contact bearing with carbon fiber fabric - fluoride resin composite - Google Patents

Abstract

According to one aspect of the present invention, there is provided a bearing using a composite structure of carbon fiber and resin, comprising: a base material (10) formed of a flat plate material (11) or a curved plate material And the fibers 20 are formed in a multi-layered structure.
According to another aspect of the present invention, there is provided a method of manufacturing a bearing using a composite structure of carbon fiber and resin, comprising the steps of: (A) pre-treating a surface of a base material; (B) forming an inner layer (21) with a carbon fiber (20) and a fluororesin (30) on the surface of the substrate (10); And (C) forming an outer layer 22 of a carbon fiber 20 and a fluororesin 30 on the surface of the inner layer 21.
As a result, it is a large bearing that reduces frictional resistance based on self-lubrication on various mechanical devices. It has flexibility for application to flat or curved surface, and it has expanded durability by ensuring durability under high temperature and various chemical components. .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon fiber fabric and a fluoride resin composite,

The present invention relates to bearing manufacturing, and more particularly, to a method for manufacturing a carbon fiber fabric-fluororesin composite material surface contact bearing that reduces frictional resistance based on self-lubricating properties in various mechanical devices.

Although the size and technology of the bearing market in Korea is steadily increasing, high precision, high performance, and large bearings for use in high temperature and various chemical environments are dependent on imports from Germany and Japan. As part of efforts to enhance global technological competitiveness in the bearing field, interest in advanced bearings including composite bearings is increasing. Composite bearings that combine carbon, ceramics, and polymer materials are suitable for environments that require a large structure, high temperatures or no lubrication.

As prior art documents which can be referred to in this connection, there are known the following Korean Patent Publication No. 2002-0007248 (Prior Art 1) and Korean Patent Registration No. 0921408 (Prior Art 2).

In the prior art document 1, 30 weight% of PTFE resin, 20 weight% of carbon fiber, 60 weight% of silicon, and 20 weight% of resin are uniformly mixed, and then the mixed material is dried at a temperature of about 180.degree. C., Is injected again into an injection molding machine and compression molded into an injection mold at a temperature of about 230 ° C. Therefore, it is expected that the wear, the noise vibration and the heat generation phenomenon are prevented, and the maintenance is easy due to the self-lubricating action.

In the prior art 2, the copper powder is sintered on a cylindrical copper-plated steel sheet (copper-plated steel sheet), and Teflon sintering is carried out. The sintered copper powder and the Teflon sintering are adjusted in a predetermined time and temperature stepwise, The thickness of Teflon is constant. Thus, it is expected that the Teflon coating will not be peeled off well and excellent abrasion resistance and self-lubricating properties will be obtained.

However, according to the above-mentioned prior art documents, there is room for improvement in terms of imparting physical properties for expanding the application field as a large-sized bearing.

1. Korean Unexamined Patent Publication No. 2002-0007248 entitled "Method of manufacturing high-grade resin high-pressure resin bushing bearing" (published on Jan. 26, 2002). 2. Korean Registered Patent No. 0921408 entitled " Sliding Bearing Using Copper and Teflon Sinter and Method for Manufacturing the Same "(Publication Date: Oct. 14, 2009).

It is an object of the present invention to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide a bearing having a large structure, which reduces frictional resistance based on self-lubrication in various mechanical devices, And a method of manufacturing a carbon fiber fabric-fluororesin composite material surface contact bearing that ensures durability in a use environment in which the component is inherent.

In order to achieve the above object, according to one aspect of the present invention, there is provided a bearing comprising a carbon fiber and a resin in combination, the carbon fiber impregnated with a fluorine resin is formed into a multilayer on a substrate formed of a flat plate member or a curved plate member .

According to a modification of the present invention, the substrate further includes a concavo-convex groove adapted to be formed into a curved plate material when a flat plate material is used.

As a detailed configuration of the present invention, the carbon fibers are formed in a fabric structure in which the inner layer and the outer layer are differentially applied with physical properties, denier, and fine-grained synthetic resin.

As a detailed constitution of the present invention, the fluororesin is characterized by using a PFA resin or a material having equivalent strength, lubricity, abrasion resistance, and heat resistance.

According to another aspect of the present invention, there is provided a method of manufacturing a bearing having a structure using a composite of carbon fiber and resin, comprising the steps of: (A) pretreating a surface of a substrate; (B) forming an inner layer of carbon fiber and fluororesin on the surface of the substrate; And (C) forming an outer layer of carbon fiber and fluororesin on the surface of the inner layer.

In a detailed configuration of the present invention, the carbon fiber further includes at least one of carbon particles, metal particles, and a porous body in an impregnated state.

As a modification of the present invention, the step (C) is characterized in that at least one of the uneven groove or the filler is further added to the surface of the outer layer.

As described above, according to the present invention, as a large-sized bearing which reduces frictional resistance based on self-lubricating properties in various mechanical devices, it has flexibility for application to planar or curved surfaces and has durability in a use environment in which high temperature and various chemical components are embedded Thereby expanding the application field.

1 is a schematic view showing a substrate applied to a bearing according to the present invention;
2 is a schematic view showing a main cross-sectional structure of a bearing according to the present invention;
3 is a schematic view showing a main cross-sectional configuration according to a modification of the present invention
4 is a flowchart showing a method of manufacturing a bearing according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to one aspect of the present invention, a bearing having a structure using a composite of carbon fiber and resin is proposed. But is not necessarily limited to, bearings for relatively large machinery. It provides a large bearing or bush with carbon fiber and resin composite that realizes no lubrication structure in response to high heat resistance and chemical environment such as chemical plant equipment and steel mill equipment.

The present invention is characterized in that a carbon fiber 20 impregnated with a fluororesin 30 is formed in a multilayer on a substrate 10 formed of a flat plate material 11 or a curved plate material 12. The base material 10 is a metal material that supports the load of the machine, but other materials having strength and rigidity equal to or higher than those of the metal material may be used. 1 (a) illustrates a flat plate material 11, and Fig. 1 (b) illustrates a curved plate material 12. Fig. The carbon fiber 20 is not limited to the type and shape of the specific raw material, but it is preferred that the carbon fiber 20 is formed in the form of a fabric using a PAN system or a pitch system. It is preferable that the resin impregnated in the carbon fibers 20 be a fluorocarbon resin 30 which is capable of melt molding while having high self-lubricating property. As shown in FIG. 1, the impregnated composite of the carbon fibers 20 and the fluororesin 30 is adhered on the substrate 10 in the molten state to the inner layer 21 and the outer layer 22 to induce curing.

On the other hand, a low friction polymer polyester yarn and a fluorocarbon polymer monofilament may be further added on the carbon fiber 20.

As a modification of the present invention, the base material 10 further comprises an uneven groove 15 suitable for forming the curved plate material 12 when the flat plate material 11 is used. The recessed and recessed grooves 15 may be formed in a linear shape parallel to one direction but in a mesh shape crossing in both directions. In any case, it is easy to bend from the flat plate material 11 to the curved plate material 12 by the uneven groove 15, and the bonding strength to the carbon fiber 20-fluororesin 30 in the subsequent process is also increased.

The carbon fiber 20 is formed of a fabric structure in which the inner layer 21 and the outer layer 22 are differentially applied with physical properties, The outer layer 22 means a layer exposed to the outermost surface and the inner layer 21 means a concealed layer except for the outer layer 22. [ The physical properties of the carbon fibers 20 can be adjusted by combining other fibers. FIG. 2 illustrates a state in which the denier is reduced as the carbon fiber 20 moves toward the outer layer 22. Although it is preferred to use plain weave, it does not exclude twill, runner, etc.

At this time, the physical properties, denier, and diameter of the carbon fibers 20 in the inner layer 21 and the outer layer 22 are set differently depending on the application, but the outer layer 22 should be relatively high in abrasion resistance and self-lubricating property. Considering the case of bending the flat plate material 11 with the curved plate material 12, it is preferable to adopt a structure in which the elasticity (flexibility) is differentiated in the inner layer 21 and the outer layer 22.

As a detailed constitution of the present invention, the fluororesin 30 is characterized by using a PFA resin or a material having equivalent strength, lubricity, abrasion resistance and heat resistance. PFA (Perfluoroalkoxy) is preferred as the fluororesin 30 in terms of fluidity, fatigue resistance and electrical insulation in addition to the physical properties described above. However, it is preferable to use a fluorocarbon resin such as ethylene tetrafluoroethylene (ETFE), polyvinylidene difluoride (PVDF), fluorinated ethylene propylene It is possible to apply it as an application. The PFA resin is heated at the set temperature for a predetermined time to induce the increase of the molecular weight and the physical properties.

According to another aspect of the present invention, a method of manufacturing a bearing using a composite structure of carbon fiber and resin is proposed. The bearing of the structure described with reference to Figs. 1 and 2 is implemented by a method of mass-production.

Step (A) of the present invention proceeds to a step of pretreating the surface of the substrate 10. The pretreatment also includes a step of forming uneven grooves 15 in addition to the operations such as blasting and pickling for removing foreign substances on the surface of the substrate 10. The step of bending the flat plate material 11 to the curved plate material 12 may proceed in step (A) as the case may be.

The step (B) according to the present invention is performed by forming the inner layer 21 with the carbon fibers 20 and the fluororesin 30 on the surface of the substrate 10. Although the lamination of the carbon fibers 20 and the coating of the fluororesin 30 are separately shown in Fig. 4, the method of further adding the fluororesin 30 while adhering both of them in the impregnated state to the substrate 10 is generally preferred do. In step (B), the inner layer 21 may be a laminated structure of two or more layers.

The step (C) according to the present invention proceeds to the step of forming the outer layer 22 with the carbon fibers 20 and the fluororesin 30 on the surface of the inner layer 21. Step (C) basically proceeds in the same manner as step (B) to form outer layer 22. However, in the formation of the outer layer 22, it is advantageous to develop a predetermined physical property by adding a constant pressure while changing the temperature from the heating to the cooling.

At this time, it is preferable to use a molding die that applies the temperature, pressure, and vibration set in the openable closed space in steps (B) and (C). Temperature and vibration are added to the mixture of the substrate 10, the carbon fibers 20 and the fluororesin 30 on the basis of the press and the mold so that impregnation of the carbon fibers 20 and the fluororesin 30 proceeds sufficiently Stop the vibration and cool to room temperature while applying pressure.

On the other hand, in mass production, it is preferable to mold the mold by gradually raising and lowering the temperature of the mold to 70 ° C, 270 ° C and 360 ° C.

As a detailed construction of the present invention, the carbon fibers 20 are characterized by further comprising at least one of carbon particles, metal particles and porous bodies in an impregnated state. Carbon particles improve abrasion resistance and fatigue resistance, and metal particles increase the dimensional stability of bearing products. Ceramic or Cu-Sn type alloy can be used as the porous body, and wear resistance and self-lubricating property are improved. The carbon particles, the metal particles, and the porous body are uniformly dispersed with the fluororesin (30). Carbon particles, metal particles, and porous bodies can be added differently in the inner layer 21 and the outer layer 22.

As a modification of the present invention, the step (C) is characterized in that at least one of the uneven groove 35 or the filler 40 is further added to the surface of the outer layer 22. 3 illustrates a state in which the uneven groove 35 similar to the uneven groove 15 of the substrate 10 is formed in the outer layer 22 and the filler 40 is added. The shape of the recessed / recessed groove 35 is preferably a shape approximate to a waveform having a round as a whole. The filler 40 is made of a material having the same elasticity as the fluororesin 30 and having high elasticity. A polyetherimide resin, a polyether sulfone resin, a polyamide resin, or the like is selectively added to the filler 40. [ The filler 40 may be filled in the recessed groove 35 or may be entirely coated. In any case, when an external force is applied immediately before or after curing of the outer layer 22 on the press and the mold, the flat plate material 11 is formed of the curved plate material 12 and the uneven groove 35 and the filler material 40 The strain is absorbed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: substrate 11: flat plate material
12: Curved plate 15: Uneven groove
20: carbon fiber 21: inner layer
22: outer layer 30: fluororesin
35: uneven groove 40: filler

Claims (7)

delete delete delete delete A method of manufacturing a bearing having a structure using a composite of carbon fiber and resin, comprising:
The bearing is made of carbon fiber impregnated with a fluororesin (30) on a base material (10) formed of a flat plate material (11) or a curved plate material (12) Wherein the carbon fibers 20 are formed in a fabric structure in which the inner layer 21 and the outer layer 22 are differentially applied with physical properties, ) Is a structure using a PFA resin or a material having equivalent strength, lubricity, abrasion resistance and heat resistance,
The method comprises:
(A) pretreating the surface of the substrate 10;
(B) forming an inner layer (21) with a carbon fiber (20) and a fluororesin (30) on the surface of the substrate (10); And
(C) forming an outer layer (22) with a carbon fiber (20) and a fluororesin (30) on the surface of the inner layer (21)
In the steps (B) and (C), the temperature, pressure, and vibration set in the closed space are applied, the temperature of the mold is gradually raised and lowered,
The carbon fibers 20 further include carbon particles, metal particles, and porous bodies in an impregnated state,
Wherein the step (C) further comprises adding a recessed groove (35) and a filler (40) to the surface of the outer layer (22). delete delete

Images