JPS5850335A - Friction member and its manufacturing method - Google Patents

Abstract

PURPOSE:To provide a friction member which is excellent in thermal conductivity with not so high modulus of elasticity and improved the friction property not to raise the temperature of the friction surface, by concentrically alternately piling a synthetic resin layer mixed with metallic powder and a metal layer to be united in a body. CONSTITUTION:A friction plate A is secured friction members 3 to both surfaces of a core plate 2 comprising a doughnut-like disc by adhesives 4. The friction members 3 are formed by alternately piling metal layers 5 and synthetic resin layers 6 radially and concentrically to be united in a body. Since the metal layers 5 are connected from the friction surface 7 to the core plate 2, heat generated at the friction surface 7 is rapidly diffused in the interior of the friction members 3, so that there is little temperature rise in the friction surface. The metal layers 5 are parallel to the direction of friction, so that the coefficient of friction will not become higher, the way things are going. Therefore, metallic powder 8 is mixed in the synthetic resin layers 6 by about 10vol%.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a friction member for use in brakes and clutches, and a method for manufacturing the same.

Friction material Ne1 used for brakes and clutches has a long history, and there are many types S. Conventionally, the mainstream friction materials have been sintered metal, paper materials, and IA lead and plastic composite materials. Recently, semi-metallic materials that are a combination of metal and plastic, ceramic materials that are a combination of metal and ceramic VH, and lumber 4 that are a combination of rubber and ceramic have been put into practical use.

Semi-metallic materials include gold kA powder such as iron and copper.
It is manufactured by mixing the short fibers with phenolic resin and other plastics and heating them. The feature of semi-metallic material is that it was used for brakes. This is due to the low elasticity of plastics, the high thermal conductivity of metals, and the high thermal conductivity of metals.In other words, when operating a clutch or brake, In addition, when pressing the friction plate against the mating plate (iron plate), the lower the hardness of the fast-rubbing material, the less likely it is that uneven contact will occur between the friction plate and the mating plate, which will generate local cylindrical surface pressure. Therefore, with the same pressing force, the lower the elastic modulus of the friction material, the lower the temperature of the friction surface, and it is less likely to generate heat spots that cause deterioration of the friction 4'A.

Metal has a high thermal conductivity and quickly transfers the heat generated on the friction surface to the inside, so the temperature of the friction surface does not rise easily.

Conventional semi-metallic materials are composites of metal powder or metal fibers with plastic, and their composition is 30-50% metal and 70-50% plastic by volume, and some contain some pores. .

When metal powder is combined with plastic, a volume fraction of 50% or more is required to obtain high thermal conductivity (see Figure 1).

However, as can be seen from FIG. 2, if the volume fraction of the metal is high, the elastic modulus of the friction material will be high and uneven contact will easily occur, which is not preferable. Therefore, conventional semi-metallic materials do not fully exhibit the characteristics of metals with high thermal conductivity.

On the other hand, if the length of the metal is increased by forming it into a fiber, it will be easier for the metals to come into contact with each other, so it should be possible to obtain good thermal conductivity even with a small amount of metal.
Uniform mixing with plastic becomes difficult.

The present invention was made in view of the above circumstances, and its purpose is to provide a semi-metallic material that has good thermal conductivity without increasing the elastic modulus and does not increase the friction surface temperature. The object of the present invention is to provide a friction member that can improve friction performance.

Another object of the present invention is to provide a friction member that has good thermal conductivity and that improves friction performance without increasing the temperature of VL friction water per gram. Method for manufacturing parts'fK: To provide.

Hereinafter, the present invention will be explained with reference to FIG. 3 and subsequent figures.

What is shown in FIG. 3 is 1 quick rubbing board A.

The friction plate A includes a core plate 2 made of a donut-shaped disk, and friction members 3 according to the present invention are fixed to both sides of the core plate 2 with an adhesive 4.

The friction member 3 is integrally formed with a metal layer 5 and a synthetic resin layer 6 arranged concentrically and alternately in the radial direction.

In this way, the gold layer 5 is transferred from the friction surface 7 to the core plate 2''!f.

Since the friction surface 7 is continuous, the heat generated on the friction surface 7 quickly diffuses into the inside of the friction member 3, and the rise in the friction surface temperature is small.

However, since the metal layer 5 has a VC parallel to the friction direction, the friction coefficient does not become high at this point. Therefore, metal powder 8 is mixed into the synthetic resin layer 6 at a volume ratio of about 10 parts.

If this is done, the coefficient of friction will be sufficiently high (i6) as shown in FIG. 5, which is necessary for a three-ru friction material.

The volume ratio of the entire laminated layer 5 is 30μ in thickness, 70μ in the thickness of the synthetic resin layer 6, and the volume ratio of metal powder 8 in the synthetic resin layer 6.
If it is o%, there will be 18 sections in total.

Therefore, the elastic modulus is lower than that of conventional semi-metallic materials, and the friction performance is improved.

Next, a method for manufacturing the friction material f41 according to the present invention will be explained in detail.

In Fig. 6, 10 is a drum wrapped with metal foil 11;
2 is metall'! 13 is a mixture of a thermosetting synthetic resin liquid having an appropriate viscosity and gold powder 8, 14 is a kite roller 15°, 19 is a hot air blower, 16
j7 is a pneumatic cylinder for pressing the roller 16.

The metal foil 11 is then passed through the mixed liquid 13 from the drum 10 using the feeding roller 12 and the kite roller 14, and the hot air from the hot air blower 15 is applied to the mixed liquid 13 adhering to the metal foil 11. Pre-cure (l#1).

Next, when winding up the metal foil II containing the pre-hardened mixed liquid + 3'i with the winding drum 18, the pressure is applied to the roller 1.
While pressing for 6 times to expel air bubbles in the mixed liquid 13 and perfect adhesion between the synthetic resins, the winding 11V and the drum 181
/ir volume is defeated.

The precured cylindrical friction member 3 is cured (condensation reaction) together with the winding drum 18, and then the winding drum 1 is cured.
8 is extracted.

Thereafter, the cylindrical body 20 of the friction member 3 is cut into disk-shaped rings and fixed to both sides of the core plate 2 with an adhesive 4 to complete the N diaphragm A.

In addition to the metal powder 8, the mixed liquid 13 may also contain anti-friction materials such as graphite molybdenum disulfide, glass fibers, silica, aluminum and the like.

As described in detail in 1', J, -, the present invention is characterized in that the synthetic resin layer 6 mixed with metal powder 8 and the metal layer 5 are concentrically and alternately stacked and integrated. It is a member.

Therefore, this friction member has good thermal conductivity without increasing the modulus of elasticity of the semi-metallic phase. can.

In this invention, the metal foil 11 is passed through a mixture 13 of thermosetting synthetic resin mixed with gold and metal powder 8, and then the metal foil 1
10 The mixed liquid 13 adhered to both sides is precured with hot air, and the metal layer 5 and the synthetic resin layer 6 are alternately and integrally wound on the winding drum 18 in a trench having a desired diameter. After gearing, the winding drum 18 is removed from the cylindrical body 20' (r), and this cylindrical body is cut into 20 pieces.
− is.

(7 Therefore, the good office heat transmission incident・i”L, /!iu
Therefore, it can be produced in large quantities (at low cost) to improve the rubbing properties *I' without raising the level of surface temperature.

[Brief explanation of drawings]

Figure 1 is a relationship diagram between the volume fraction of phenolic resin, the volume fraction of tlil powder, and specific resistance, completed: Figure 2C1i A 1<11 relationship diagram between the volume fraction of phenolic resin, the volume fraction of copper powder, and the elastic modulus, Third
The figure is a partially omitted perspective view of a friction plate using the seat rub part 4A according to the present invention, FIG. 4 is an enlarged view of section P in FIG. Figure 6 shows the relationship between the volume ratio and the coefficient of friction. It is a process explanatory diagram with parts omitted.I is a friction part made of paulownia, 5 is a metal layer, 6 is a synthetic resin layer, 8 is a metal powder, 11 is a metal foil, 13 is a mixed liquid, 18 is a winding drum,
2o is a cylindrical body. Applicant: Komatsu Ltd. Representative Patent attorney: Masaaki Yonehara Patent attorney: Tadashi Hamamoto 1-ku ○tsu-ku Sukuguchiju (Dv) ``3Jp J': γ Ikkuro 1 Fuku

Claims (2)

[Claims] (1) A friction member characterized in that a synthetic resin 1-6 mixed with metal powder 8 and a metal layer 5 are concentrically and alternately stacked and integrated with each other in an easy-to-align manner. (2) After passing the metal foil 11 through a mixture 13 of thermosetting synthetic resin mixed with metal powder 8, the mixture 13 adhering to both sides of the metal foil 11 is pre-cured with hot air ( The metal layer 5 and the synthetic resin layer 6 are continuously wound on the winding drum 18 until each piece has a desired diameter, and the metal layer 5 and the synthetic resin layer 6 are all alternately stacked together, and after gearing, the winding drum 18 is removed from the winding drum 18 to form a cylindrical shape. A method for manufacturing a friction member, characterized in that a body 20 is formed and the cylindrical body 20 is cut into rings.