JPS6212958B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a solid lubricant that is used by coating (rubbing) a lubricated member. The solid lubricant is formed from fine powder of a solid lubricant material such as molybdenum disulfide or tungsten disulfide, and wax that solidifies the fine powder.
Conventional solid lubricants include those obtained by the so-called melt molding method, in which fine powder of solid lubricant material is mixed into melted wax, and then poured into a mold and cooled to solidify. There is a so-called compression molding method in which fine powder and solid lubricant material fine powder are mixed and compression molded at high pressure in a powder compression molding machine. However, since all of these solid lubricants are formed into a completely solid solid, they produce unpleasant high-frequency sliding noises when coated on the lubricated parts, and when there are joints in the lubricated parts such as rails. for,
There was a drawback in that a large impact sound was generated when coating the joint portion. This noise is a big problem in quiet environments such as elevator guide rail lubrication. Furthermore, the heat resistance of each solid lubricant is determined by the melting point of the wax, making it suitable for use under high-temperature conditions. Incidentally, the melting point of wax is normally around 70℃, and even specially developed waxes have a melting point of just over 100℃. Moreover,
Since all of the solid lubricants depend on the wax component to form a lubricating film on the lubricated member, the uniformity of adhesion to the lubricated member and the ductility were poor. The present invention was developed under the above circumstances, and the first object of the invention is to provide a solid lubricant that can reduce noise during coating and improve heat resistance. The object of the second invention is the above-mentioned first invention.
In addition to the object of the invention, it is an object of the present invention to provide a solid lubricant that can improve the uniformity of adhesion to a lubricated member and the ductility of a coating film. Hereinafter, the first invention will be explained with reference to FIGS. 1 and 2. FIG. 1 shows a flange wear protector for cranes, which is used to lubricate wheel flanges of rail running bodies such as cranes in steel mills or shipyards. In Fig. 1, 1 is a mounting bracket that can be rotated around a pivot 2 and the opening angle can be adjusted by the rotation, 3 is a mounting bolt, and 4 is a pivot whose one end can be freely tightened to the free end of the mounting bracket 1. The main body is connected via 5, 6 is a rotating body supported by the other end of the main body 4, and has an arm 7 which is biased with rotational force by a not-shown spiral spring, and 8 is a tightening body attached to the arm. be. This anti-friction device is used by clamping and supporting a solid lubricant 9 in the shape of a circular arc between the clamping body 8 of the arm 7, and the solid lubricant 9 is attached to the wheel flange 10. The wheel flange 10 is pressed by a spiral spring to lubricate the wheel flange 10. The solid lubricant 9 is related to the first invention, and the solid lubricant 9 is related to the second invention.
As shown in the figure, it is formed from a sintered body in which a porous void structure 12 is provided in a connective structure 11 of wax and fine powder of solid lubricant material as the main component. In order to obtain this solid lubricant 9, for example, a solid wax is added to a mixed wax of a fine powder component of a void structure forming wax that is evaporated by firing, which will be described later, and a fine powder component of a bonding wax that is not evaporated by firing. Fine powder of lubricant material is mixed at a mixing ratio of 50% or more, and this mixed mixture is pressed into a predetermined shape using a molding machine at a low pressure of 50 kg/cm ³ or less.Then, the press-formed product is coated with bonding wax. By firing in a firing machine at a temperature in the softening or melting point range, the wax component for forming a void structure is evaporated and the binding wax component and the solid lubricant material are combined, and then the sintered body is water-cooled or Just air cool it. At least one of molybdenum disulfide, tungsten disulfide, boron nitride, ethylene tetrafluoride, graphite, etc. is used as the solid lubricant material. The component ratio of the mixed wax is 7 for the void structure forming wax component with a melting point of 70°C and 3 for the bonding wax component with a melting point of 115°C, and the mixing ratio of this mixed wax and the solid lubricant material (however, molybdenum disulfide) The specifications of a solid lubricant obtained from a mixture of 2:8 as raw material are as shown in the following table, according to experiments conducted by the present inventor.

[Table] According to the solid lubricant 9 described above, as is clear from the above specification table, the heat resistance temperature is higher than the melting point of the wax itself, which is the raw material. Therefore, it can withstand use under high temperature conditions, and is suitable for use, for example, when attached to the flange wear protector shown in FIG. 1 to lubricate wheel flanges of cranes in steel factories. Furthermore, since the connective tissue 11 forming the solid lubricant 9 is mainly composed of a solid lubricant material, the amount of the solid lubricant material is large and can exert a sufficient lubricating effect on the wheel flange 10 and the like. Since the solid lubricant 9 has a structure in which a continuous and congested porous pore structure 12 is provided in the connective tissue 11, this porous pore structure 12 reduces the noise generated when coating the wheel flange 10, etc. be able to. Therefore, it is suitable for applications where pronunciation is not preferred. Next, the second invention will be explained with reference to FIGS. 3 to 5, and only the parts that are different from the first invention will be explained. 3 and 4 show a part of the switch, 13 in the figure is a tongue rail, 14 is a tongue rail 13
is the floor plate that slides on the upper surface, 15 is the tongue rail 14
This is a lubricator attached to the floorboard 14 to lubricate the upper surface of the floorboard 14. The lubricator 15 includes a mounting bracket 17 attached to the tongue rail 14 by a screw 16, a lubricant guide 19 rotatably supported by the bracket 17, and the guide 19.
A solid lubricant 21 in the form of a band is stored in the lubricant guide 19. This lubricant 21 is related to the second invention, and in the usage examples shown in FIGS. 3 and 4, it is pressed against the upper surface of the floor plate 14 to lubricate the upper surface of the floor plate 14 as the tongue rail 13 moves. It's getting old. The solid lubricant 21 is, as shown in FIG. It is formed by making the void structure 12 contain oil 26. In order to obtain this solid lubricant 21, the sintered body is cooled with oil after the firing process already described in the first invention, or the sintered body is heated after the water cooling process is already described in the first invention. to evaporate the water, then
The sintered body may be immersed in oil, or the sintered body may be immersed in oil after the air-cooling process described above in connection with the first invention, either as it is or after being heated. In addition, in the immersion process in oil, pressure is applied to the oil to speed up the filling of the porous structure 12 with oil, as appropriate. The oil 26 may include drying oils such as linseed oil, eno oil, tung oil, flaxseed oil, kaya oil, walnut oil, soybean oil, mustard oil, poppy seed oil, and sunflower oil, or cottonseed oil, corn oil, sesame oil, and rapeseed oil. , semi-drying oils such as rice bran oil, non-drying oils such as peanut oil, olive oil, camellia oil, sasanquat oil, tea oil, other vegetable oils, marine animal oils, land animal oils, etc., can be used as solid lubricants. selected according to the characteristics required. Note that the porous void structure 12
According to experiments conducted by the present inventor, the specifications of the solid lubricant obtained by cooling the sintered body with oil and containing lubricating oil (camellia oil) were as follows. Penetration 8 Static friction coefficient 0.18~0.20 Dynamic friction coefficient 0.08~0.10 Lubricating film properties Moisture Heat resistant temperature 120°C According to the solid lubricant 21 described above, the heat resistant temperature is higher than the melting point (115°C) of the raw material wax. is clear, and since the solid lubricating material is the main component, it can exert a sufficient lubricating effect, and since it has a continuous and congested porous pore structure 12, it can obtain a noise reduction effect. . In addition, since the porous structure 12 contains oil 26, the solid lubricant 2 is absorbed by a small amount of oil 26.
The adhesion of No. 1 can be improved. When the oil 26 is a non-drying oil, a thin oil film of the oil 26 covers the surface of the lubricated member for a long period of time, so that a high rust prevention effect can be obtained. Moreover, if the oil 26 is contained in the porous structure 12 by cooling the sintered body with non-drying oil as in this embodiment, it becomes a soft (penetration degree 8) solid lubricant. In combination with improved uniformity of oil adhesion and improved ductility of the coating film, excellent rubbing properties can be obtained. Note that although the above embodiment is configured as described above,
In carrying out the present invention, it goes without saying that the specific materials and amounts of wax, solid lubricating material, oil, etc. are not limited to those in the above-mentioned embodiments as long as they do not go against the gist of the present invention. In the first and second inventions described above, a porous pore structure is provided in the connective structure of the wax and the fine powder of the solid lubricant material which is the main component. It has the effect of reducing the noise generated when the wax is heated, and since it has a structure made of a sintered body, it has the effect of being able to be used at temperatures higher than the melting point of wax. Moreover, since the second invention further includes a structure in which oil is contained in the porous structure, there is an effect that the uniformity of adhesion to the lubricated member and the ductility of the coating film can be improved.

[Brief explanation of the drawing]

1 and 2 illustrate the first invention, with FIG. 1 being a perspective view of an example of use, and FIG. 2 being an enlarged schematic sectional view showing the structure of a solid lubricant. Figures 3 to 5 illustrate the second invention, Figure 3 is a front view of an example of use, Figure 4 is a sectional view taken along the line - in Figure 3, and Figure 5 is a solid lubricant. FIG. 3 is a schematic cross-sectional view showing an enlarged structure of the tissue. 9,21...Solid lubricant, 11...Connective tissue, 12
...Porous void structure, 26...Oil.

Claims (1)

[Scope of Claims] 1. A solid lubricant comprising a sintered body in which a porous pore structure is provided in the connective structure of wax and fine powder of a solid lubricant material as a main component. 2. A sintered body in which a porous pore structure is provided in the connective structure of wax and fine powder of a solid lubricant material as a main component, and the porous pore structure contains oil. lubricant.