JPH11315868A - Disc spring and method of forming film for lubricating surface layer of the disc spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the wear resistance, corrosion resistance and toughness by rubbing or impregnating the activated ion component of one or both of molybdenum disulfide or graphite into a surface layer and forming a lubricating film consisting of this impregnated component. SOLUTION: A steel ball of 50 μm having a hardness equal to or more of a disc spring hardness is dipped in 0. 5 μm of a mixture of molybdenum disulfide blended in a mineral oil, and then taken out. A lubricating particle consisting of molybdenum disulfide is laid over the steel ball surface by performing a drying fixing treatment at a low temperature with the mineral oil as a binder to form powdery solid mixed particles. Under the condition of continuously splaying the mixed particles to the surface of a disc spring 1 by air at an injection speed of 120 m/sec, the lubricating particle is repeatedly planted while repeatedly forming a crepe irregular surface on the surface layer by the impact energy at the collision of the steel ball. According to this, the activated ion component of the lubricating particle is rubbed into the surface layer, so that slidability, wear resistance, oil feed resistance and galling preventing property can be imparted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc spring and a method for forming a surface lubricating film on the disc spring.

[0002]

2. Description of the Related Art Conventional coned disc springs include small stamped products for mass production, large cut products, and plated products with enhanced rust and corrosion resistance. I have. In other words, pressed products have problems in slipperiness and abrasion resistance, cut products have concentric cutting traces (race surface) and have problems in slipperiness, and plated products have problems in electroplating. There is a problem of hydrogen embrittlement, in which hydrogen generated in a workpiece invades a processed product and weakens mechanical toughness as a spring elastic characteristic.

[0003]

The problems to be solved are, firstly, all of slipperiness, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and mechanical toughness as spring elastic properties. Secondly, a method for producing a surface lubricating film of a disc spring which can be efficiently manufactured so that hydrogen embrittlement does not occur in a plated spring of the above-mentioned disc spring. Thirdly, it is another object of the present invention to provide a method of forming a lubricating film on the surface of a disc spring that can reliably and efficiently rub one or both of molybdenum disulfide and graphite and form a film.

[0004]

According to the present invention, in order to attain the above-mentioned object, in a Belleville spring, molybdenum disulfide or graphite or an activating ion component of both are rubbed and impregnated on a surface layer surface. In addition, a lubricating coating made of either or both of the impregnated molybdenum disulfide and graphite of the same component is formed. In the method of forming the surface lubricating film of the disc spring, the surface of the disc spring has a hardness of 30 to 8 having a hardness equal to or higher than the disc spring hardness.
In addition to a steel ball of 0 μm, mixed particles composed of lubricating particles of either or both molybdenum disulfide of 0.2 to 0.8 μm or graphite having a purity of about 98 to 99.8% are mixed with 90 to 150 μm.
m / sec, and the lubricating particles are repeatedly injected into the surface while forming a matte-like uneven surface on the surface with the impact energy at the time of the collision of the steel ball, and the same lubrication is applied to the surface. An active ion component of the particles is rubbed in, and a lubricating film made of molybdenum disulfide or graphite of the same component or both is formed and treated. Further, in the method for forming a surface lubricating film according to the present invention, the mixed particles are dry solids in which lubricating particles are attached to the surface of a steel ball with a mineral oil as a binder.

[0005] The mixed particles in the present invention may be either in a dry and dry state or in a wet or liquefied wet state. The relationship between the steel ball and molybdenum disulfide and / or graphite may be an integral relationship where molybdenum disulfide and / or graphite is adhered to the surface of the steel ball, or may be a separate relationship. It may be.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of a disc spring according to the present invention, a disc spring of a known shape and material is used. The activating ion component of molybdenum sulfide is rubbed in and impregnated, and a lubricating film made of the impregnated molybdenum disulfide of the same component is formed by adhesion.

Next, as another embodiment of the disc spring of the present invention, a second embodiment will be described. The disc spring has a known shape and material. The activated ion component of graphite is rubbed and impregnated,
A lubricating film made of the impregnated graphite of the same component is applied.

As another embodiment of the disc spring of the present invention, a third embodiment is exemplified. The disc spring is of a known shape and material, and the surface of the disc spring is molybdenum disulfide. Activated ion components of graphite and graphite are rubbed and impregnated, and a lubricating film composed of the impregnated molybdenum disulfide and graphite of the same components is adhered and formed.

Next, as one embodiment of the method for producing a surface lubricating film of a disc spring of the present invention, the above-mentioned disc spring of the first embodiment will be described. First, mixed particles are prepared in advance. 0.
In a mixture of 5 μm molybdenum disulfide mixed with mineral oil, 50 μm having a hardness equal to or higher than the disc spring hardness
Is taken out, and lubricated particles made of molybdenum disulfide are dried and fixed at a low temperature using mineral oil as a binder to adhere to the surface of the steel ball to form powder solid mixed particles. The above-mentioned mixed particles are jetted on the surface of the disc spring 1 by air at an injection speed of 120 m / sec, and under this continuous jetting state, a matte surface is repeatedly formed on the surface layer by the impact energy at the time of collision of steel balls. While forming, at the same time, by repeatedly driving the lubricating particles on the surface layer, the activating ion component of the lubricating particles is rubbed on the surface layer, and the sliding property, abrasion resistance, abrasion resistance, lubrication resistance, In addition to imparting corrosion resistance and anti-galling properties, a mixed lubricating film of molybdenum disulfide is applied to this surface to further provide mechanical toughness as a spring elastic property.

Next, as another embodiment of the method for producing a surface lubricating film of a disc spring of the present invention, a disc spring of the above-described second embodiment will be described. First, mixed particles are prepared in advance.
A 50 μm steel ball having a hardness equal to or greater than the disc spring hardness is immersed in a mixture of graphite having a purity of about 99% and 0.5 μm graphite mixed with mineral oil, taken out, and the surface of the steel ball is made of graphite. The resulting lubricating particles are dried and fixed at a low temperature using a mineral oil as a binder and then adhered to form powder-solid mixed particles. The above-mentioned mixed particles are jetted on the surface of the disc spring 1 by air at an injection speed of 120 m / sec, and under this continuous jetting state, a matte surface is repeatedly formed on the surface layer by the impact energy at the time of collision of steel balls. While forming
At the same time, by repeatedly driving the lubricating particles into the surface layer, the activated ion component of the lubricating particles is rubbed into the surface layer, thereby improving slipperiness, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and galling prevention. In addition to imparting properties, the surface layer is coated with a mixed lubricating film of graphite to further impart mechanical toughness as a spring elastic property.

Next, as another embodiment of the method for producing a surface lubricating film of a disc spring of the present invention, a disc spring of the above-described third embodiment will be described. First, mixed particles are prepared in advance.
In a mixture of 0.5 μm molybdenum disulfide and 0.5 μm graphite with a purity of about 99% mixed with mineral oil,
A 50 μm steel ball having a hardness equal to or greater than the disc spring hardness is immersed, taken out, and lubricated particles composed of molybdenum disulfide and graphite are attached to the surface of the steel ball by drying and fixing at a low temperature using mineral oil as a binder. As a result, powder-solid mixed particles are formed. The above-mentioned mixed particles are jetted onto the surface of the disc spring 1 by air at an injection speed of 120 m / sec, and under this continuous jetting state, a matte surface irregular surface is repeatedly formed on the surface layer by impact energy at the time of collision of a steel ball. While forming
At the same time, by repeatedly driving the lubricating particles into the surface layer, the activated ion component of the lubricating particles is rubbed into the surface layer, thereby improving slipperiness, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and galling prevention. In addition to imparting properties, the surface layer is coated with a mixed lubricating film of molybdenum disulfide and graphite to further add mechanical toughness such as spring elasticity.

In the above-described method for forming a surface lubricating film, an example has been described in which the mixed particles are in the form of a powder solid in which molybdenum disulfide and / or graphite is adhered to the surface of a steel ball. However, the present invention is not limited to this. The particles may be in the form of a powder solid in which steel balls and molybdenum disulfide and / or graphite are separate bodies. Further, the present invention is not limited to pneumatic injection but may be hydraulic injection.

Table 1 shows the mechanical toughness as the slipperiness, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and spring elasticity of the plated product and the product of the first aspect of the present invention. And data on hydrogen embrittlement.

[0014]

[Table 1]

[0015]

A. Effects of the Invention According to the first aspect, the sliding property, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and mechanical toughness as spring elastic properties are excellent. B. According to claim 2, hydrogen embrittlement such as plating of a disc spring excellent in slipperiness, abrasion resistance, abrasion resistance, lubrication resistance, corrosion resistance, and mechanical toughness as a spring elastic property occurs. It can be manufactured efficiently so as not to do so. C. According to claim 3, furthermore, the rubbing and the film formation can be carried out reliably and with high efficiency.

Claims (3)

[Claims] An activated ion component of one or both of molybdenum disulfide and graphite is rubbed and impregnated on a surface layer, and either or both of molybdenum disulfide and graphite of the same impregnated component are impregnated. A conical spring characterized in that a lubricating film comprising: 2. In addition to a steel ball of 30 to 80 μm having a hardness equal to or greater than the hardness of the disc spring, 0.2 to 0.2 mm
0.8 μm molybdenum disulfide or 98-99.
About 8% of graphite or mixed particles composed of lubricating particles of both are injected at an injection velocity of 90 to 150 m / sec, and the impact energy at the time of the collision of the steel balls forms a matte uneven surface on the surface layer. While repeatedly rubbing the lubricating particles on the surface, the activated ion component of the lubricating particles is rubbed into the surface and a lubricating film composed of molybdenum disulfide and / or graphite of the same component is formed. A method for forming a lubricating film on the surface of a disc spring, characterized in that: 3. The lubricating surface of a disc spring according to claim 2, wherein the mixed particles are dry solids in which lubricating particles are attached to the surface of a steel ball with mineral oil as a binder. Film generation method.