JPS62209236A - Disc-like friction body - Google Patents

Abstract

PURPOSE:To make the amount of abrasion uniform, by arranging a continuous fiber in the circumferential direction of a disc, and by applying a uniform frictional phenomenon to a frictional body. CONSTITUTION:A continuous fiber 1 contained in a disc-like friction body, is arranged in the circumferential direction of the disc. Due to the provision of the continuous fiber 1, it is possible to sufficiently increase the mechanical strength of the disc-like friction body itself. Further, since the fiber is arranged in the circumferential direction, friction due to rotary motion may be always obtained similarly even though it is microscopically observed. Accordingly, uniform friction occurs, and therefore, the thickness of abrasion in the slide surface is worn always uniformly even though it is rotated for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application The present invention relates to a disc-shaped if-cooling body that can be placed on the contact surface when transmitting, stopping, or starting rotational motion using frictional force. It is.

Conventional technology Conventionally, as a 1F rubbing body, asbestos IN miscellaneous, etc., length number 1 type 111! The miscellaneous filling is formed into a rope shape, impregnated with thermosetting resin varnish such as phenolic resin, dried, and then this MIJ fat-impregnated rope is spirally wound and molded under heat and pressure. Sheets dispersed in the binder [? The cavity is well known. Also, 3! ! The continuous fibers are oriented in one direction c 7-*, impregnated with a thermosetting resin, laminated and molded under heat and pressure to create a sheet-shaped molded product, which is then cut. There is a disc-shaped friction body in which continuous fibers are oriented in one direction, as shown in Figure 2 (a).The continuous fibers are knitted into a woven fabric, and created using the same method as in the case where the continuous fibers are oriented in one direction. A disk-shaped friction body (FIG. 2(b)) is also known.

Problems to be Solved by the Invention In such conventional examples, it is difficult to exceed 50% of the volume content of the short fibers obtained by dispersing the short fibers in an organic binder, and therefore the durability is poor. In terms of abrasion resistance, it is inferior to the case where continuous LA fibers are used. Since short fibers are used, the bending J3 and tensile strength of the sheet-like friction body are extremely inferior to those of the in-contact type. on the other hand,
For a continuous fiber oriented in one direction, the friction is 1 J at point A in Figure 2 (a), and the opposing material is 1 J in the direction perpendicular to the fibers.
? Cool, at point B, 1 in the direction parallel to the fibers? Rub. As described above, the contact rotating surface has anisotropy, and the dynamic friction coefficient and specific wear amount are different between points A and 8, causing a problem in that a uniform friction phenomenon does not occur. In particular, with respect to wear, anisotropy of more than double was observed in Point 8 when frictionally rotated for a long time. If a woven fabric made by knitting continuous fibers is used as a friction body, the anisotropy such as the amount of wear will be less than when the continuous fibers are oriented in one direction. The fibers will swell up in the areas where they are present. A molded product using plain weave as a commonly used woven fabric and impregnated with thermosetting resin has a friction contact surface where the C fibers are exposed on the surface and the resin is exposed on the surface. ! The resin is arranged in an 87-shape, and as a result of rotational friction, the resin is worn out first, and as a result, the friction surface becomes uneven, and the 1' is different from the initial state. j! This was a problem because the friction coefficient had to be determined. In addition, depending on the surface condition and shape of the pull material, it may get caught on the unevenness of the door, making it difficult to expect smooth operation. Also, is this 1? Another problem was that when used as a rubbing body, noise was generated due to sliding.

The present invention solves these problems and provides uniform friction with extremely low wear. J: There are objects whose purpose is to hold sea urchins.

Means for Solving the Problem In order to solve this problem, the present invention provides a disk-shaped r'? In the e body, +1η fibers include continuous S fibers, and the continuous fibers are oriented in the circumferential direction of a disc.

Effect With this configuration, since continuous m miscellaneous is used, 41i1
Since the volume content of can be made sufficiently large, sufficient wear resistance can be obtained, and the mechanical strength of the disc-shaped friction body itself can be sufficiently increased compared to the case where Class 4I fibers are dispersed. Furthermore, since the fibers are oriented in the circumferential direction, the same 1♀ rubbing condition can always be obtained even when viewed microscopically against friction caused by rotational motion.

As a result, uniform wear occurs, and the wear thickness on the sliding surface always wears out uniformly even when frictionally rotates for a long time. Furthermore, the coefficient of friction does not change drastically due to the homogeneity of the contact surface, and the noise caused by sliding is also reduced compared to the past.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

Example 1 A unidirectional bleb ring made of carbon fiber impregnated with epoxy resin was wound one layer at a time around a metal core. The width of the bleb rig was approximately lnn. The resin was completely evaporated by leaving the rolled grate at 130°C for 2 hours while maintaining a pressure of 10 k/d on the top and bottom of the disk, resulting in a GI miscellaneous volume content of 75%. "l +
A disc-shaped friction body (Fig. 1(a) @Teru) in which continuous m-type 1 was oriented in the circumferential direction of g11 was obtained.The white part in Fig. 1(a) indicates the organic binder 2, and this In the case of the example, it is an epoxy resin.As a result of conducting a dark continuous stainless steel sliding test on the cylindrical end face, the specific wear amount was 3.Ox 10-1
7. @j / ksu・1. This is the specific wear rate ff14.5X 1O-2 at/
It showed more than 100 times the crushing wear resistance compared to kQ・1. In addition, compared to unidirectional brep rigs and rimples that are formed into a sheet using 11 cloth and cut into a disc shape,
There was no XXa caused by sliding. There was no change in the surface condition even after a long test, and the frictional resistance during the sliding wear test was stable within 10% of J3, and the wear condition was also uniform. On the other hand, in the case of the 1-nample shown in Figure 2 (a), point A is more likely to wear than point B, and the frictional resistance fluctuates within a range of 50% from the beginning of the test IFtJ, as shown in Figure 2 (b). The frictional resistance value of the sample gradually decreased to 1/3 over about an hour, and the worn surface was uneven with remaining fibers.

<Example 2> After aromatic polyamide fibers were troughed onto gold B stone, they were impregnated with a solution made of a thermosetting resin varnish containing bismaleimide-triazine resin and a flexible excipient, and then 150% After drying for several minutes at ℃, the upper and lower parts of the disk were heated at 200 kQ/clI while maintaining a pressure of 100 kQ/clI.
2 hours at ℃/13! v11, the Ili fiber volume content is 70, in which the fibers are spirally wound in the circumferential direction.
% of the disc-shaped friction body [see FIG. 1(b)] was obtained.

As in Example 1, a dark stainless steel continuous erosion test was conducted on the cylindrical end surface, and the specific wear amount was 5. Ox10
” (,j/kg ・l.This is a 10% volume content of pulp-like short m fibers of aromatic polyamide fibers.
Specific wear fei of sample dispersed with similar resin 1
．． It exhibited approximately 40 times better wear resistance than 8X10-'csf/kg/m. In addition, when using a one-way bleep rig or woven fabric, smooth l! J-rubbing phenomenon does not occur and I! In contrast to the P friction resistance, which caused movement and partial wear, the disc-shaped friction body of the present invention caused smooth friction, and 1F wear was uniform on the contact surface. J3, 11 in Figure 1(b) is a continuous fiber,
2 is the Akebono binding material.

Two representative examples have been described above, but as continuous fibers, in addition to Moejo's hydrocarbon fibers and yJ apricot group polyamide fibers, at least The same tendency was also observed when one was used. As the resin, -6, which is mainly composed of a thermosetting resin such as a phenol resin, a polyurethane resin, or an unsaturated polyester resin, and mixed with modifiers suitable for various uses, was suitable. Even if inorganic fillers such as barium, silica, calcium carbonate, and graphite or metal powders such as copper powder are added,
A disc-shaped friction body with continuous fibers oriented in the circumferential direction is
Good results were obtained, with less wear than in the case of short fiber dispersion and stable frictional resistance against rotational motion.

In the present invention, there is no need to obtain a sheet-like molded product using continuous fibers oriented in the - direction or a woven fabric as a base material, and cut it into a suitable disc shape. Another feature is that it can be created by pressure heating.

Furthermore, since continuous fibers are used, the mechanical strength of the disc-shaped friction body is much greater than that of dispersed short fibers.
λIi removal is possible. Even when looking at the contact surface microscopically, the contact surface is smaller when continuous fibers are arranged in the circumferential direction of a disk, compared to when short am fibers are dispersed or when woven fabric is impregnated with resin. It is thought that more stable rotation will be possible by using it, for example, on the contact surface of an ultrasonic motor that requires M density.

EFFECTS OF THE INVENTION According to the present invention, as described above, in a disc-shaped friction body whose essential components are an organic binder and fibers, "IJ!
Orient m in the circumferential direction of the disc dt! By doing so, when the friction body is placed on a rotating contact surface and receives frictional force, a homogeneous friction phenomenon occurs, the amount of wear becomes even, smooth operation is possible, and noise caused by activity is reduced. You can do less. In addition, since continuous 1'AM is used, the friction body has sufficient mechanical strength, and 1? A disc-shaped friction body with extremely low wear and tear can be obtained.

[Brief explanation of drawings]

1(a) and 1(b) show an embodiment of the present invention, and FIG. 1(a) is a plan view showing the arrangement state of Ili miscellaneous when disc-shaped friction body prepregs are laminated. Figure (b) shows discoid I! FIGS. 2(a) and 2(b) are plan views showing the arrangement of the m-fibers when the i-coelomoid fibers are spirally wound, and FIGS. 2(a) and 2(b) are plan views of different conventional examples. 1...Reverse lkI#4 cord, 2...N bonding material base
Moriki 6 Hiroshi Figure 1 (a) f-4≧,
Distance Hi δ Post # Good Figure 2 (bλ

Claims (1)

[Claims] 1. A disc-shaped friction body comprising an organic binder and fibers as essential components, wherein the fibers include continuous fibers and the continuous fibers are oriented in the circumferential direction of the disc. Disc-shaped friction body. 2. The disc-shaped friction according to claim 1, wherein the continuous fibers are at least one of the group consisting of carbon fibers, silicon carbide fibers, alumina fibers, glass fibers, aromatic polyamide fibers, polyester fibers, and polyamide fibers. body.