JPH0468490B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the invention (1) Industrial field of application The present invention relates to a brake lining, in particular a brake lining comprising a wear-resistant metal filler and having a brake disk on one side;
The present invention relates to a lining that serves as a pressing surface for a braked member such as a brake drum, and whose surface opposite to the pressing surface is an adhesive surface to a back plate, and a method for manufacturing the lining.

(2) Prior Art Conventionally, in this type of lining, a metal filler is dispersed substantially uniformly throughout the lining (see Japanese Patent Laid-Open No. 57-94140).

(3) Problems to be Solved by the Invention However, with the above configuration, there is a problem in that the initial conformability of the lining to the braked member is poor because the abrasion resistance of the pressing surface against the braked member is high from the beginning.

An object of the present invention is to provide the above-mentioned lining and its manufacturing method which can solve the above-mentioned problems.

B. Structure of the Invention (1) Means for Solving the Problems The present invention includes a wear-resistant metal filler, one surface of which is used as a pressing surface against a braked member, and the surface opposite to the pressing surface that is applied to a back plate. In the brake lining having an adhesive surface, the metal filler is dispersed coarsely on the pressing surface and a region in the vicinity thereof, and densely distributed on the adhesive surface side of the pressing surface.

The present invention also provides a brake lining that includes a wear-resistant metal filler, has one surface as a pressing surface for a braked member, and has a surface opposite to the pressing surface as an adhesive surface for a backing plate. When preparing a lining material containing the magnetic metal filler and then subjecting the lining material to a forming operation,
The method is characterized in that a magnetic force is applied from the adhesive surface side to disperse the metal filler coarsely on the pressing surface and a region in the vicinity thereof, and more densely on the adhesive surface side of the pressing surface.

(2) Effects According to the lining, the amount of metal filler dispersed in the pressing surface and the area near it is smaller than the initial amount, so the wear resistance of the area decreases accordingly.
This makes it possible to improve the initial conformability of the lining to the braked member.

Further, since the amount of metal filler dispersed is larger on the adhesive surface side than in the above region, after the initial wear on the pressing surface side, the metal filler exhibits abrasion resistance and the durability of the lining is improved.

According to the manufacturing method, the lining can be easily and reliably obtained by attracting the metal filler to the adhesive surface side using magnetic force.

(3) Embodiment Figures 1 to 3 show a friction pad 1 for a disc brake, and the friction pad 1 is attached to a back plate 2 suspended by a hanger pin, and to the back plate 2 through an adhesive surface 3. The surface of the lining 4 opposite to the adhesive surface 3 is a pressing surface 6 against a brake disc 5 as a braked member.

The lining 4 contains steel fibers f as a magnetic wear-resistant metal filler, and the steel fibers f
has an average diameter of 59 μm (maximum diameter 109 μm, minimum diameter
10 μm) and 2 to 3 mm in length.

As clearly shown in FIG. 3, the steel fibers f are coarsely distributed on the pressing surface 6 and a region r in its vicinity, and are densely distributed on the adhesive surface 3 side from the region r.

With this configuration, since the amount of steel fibers f dispersed in the region r is smaller than initially, the wear resistance of the region r is accordingly reduced, thereby improving the initial conformability of the lining 4 to the brake disc 5. be able to.

Furthermore, since the amount of steel fibers f dispersed is larger on the adhesive surface 3 side than in the region r, after the initial wear on the pressing surface 6 side, the steel fibers f exhibit wear resistance and the durability of the lining 4 is improved.

FIG. 4 shows a compression molding apparatus for the lining 4. The device includes a base 7 having a flat top surface;
A die 9 is provided upright on the upper surface of the base 7 and has a die hole 8 having the same shape as the lining 4, and a punch 10 is slidably fitted into the die hole 8 and forms the pressing surface 6. ing. The die 9 includes a die body 12 having a pair of legs 11 and a magnetic block 1 that is fitted into a die hole 8 of the die body 12 to form the bottom of the die hole 8 and form the adhesive surface 3.
Consists of 3.

A coil 14 is wound around the outer peripheral surface of the magnetic block 13, and the coil 14 is connected to a power source 16 via a switch 15. As a result, magnetic block 1
3 and the coil 14 constitute an electromagnet 17.

In manufacturing the lining 4, a paste-like lining material m containing the steel fibers f, phenol resin, etc. is prepared, and after raising the punch 10, the lining material m is put into the die hole 8, and the lining material m is The lining 4 is compression-molded by pressing with a punch 10.

During the compression molding, for example, the switch 15 is closed before the start of the molding operation, and the electromagnet 17 is turned on until the end of the molding operation.
is energized, a magnetic force is applied to the steel fibers f in the lining material m, and the steel fibers f are attracted to the adhesive surface 3 side. By appropriately adjusting the magnetic force at this time, the amount of dispersion of the steel fibers f can be increased on the adhesive surface 3 side and decreased on the pressing surface 6 side.

After the compression molding, the lining 4 is removed from the die hole 8, and the adhesive surface 3 of the lining 4 is superposed on the back plate 2, and then heated and cured under pressure and adhered to the back plate 2, thereby obtaining the friction pad 1.

Note that steel powder, steel particles, etc. can also be used as the magnetic wear-resistant metal filler.

C. Effects of the Invention According to the lining according to the present invention, the wear resistance on the pressing surface side is reduced from the beginning, so that the initial conformability to the braked member can be improved. Moreover, since the metal filler exhibits wear resistance after the initial wear on the pressing surface side, a lining with excellent durability can be provided.

According to the manufacturing method according to the present invention, the lining can be easily and reliably obtained by utilizing magnetic action.

[Brief explanation of drawings]

Figures 1 to 3 show the friction pad, with Figure 1 being a front view, Figure 2 being a sectional view taken along the line shown in Figure 1, and Figure 3 being a sectional view taken along the line shown in Figure 1.
The figure is an enlarged view of the part indicated by the arrow in FIG. 2, and FIG. 4 is a longitudinal sectional view of the lining forming apparatus. f...Steel fiber as a metal filler, m...Lining material, r...Region, 2...Back plate, 3...Adhesive surface, 4...Lining, 5...Brake disc as a braked member, 6... Pressing surface, 17...
electromagnet.

Claims (1)

[Scope of Claims] 1. A brake lining containing a wear-resistant metal filler, one surface of which is a pressing surface against a braked member, and the surface opposite to the pressing surface which is an adhesive surface to a backing plate, wherein the metal A lining for a brake, characterized in that the filler is dispersed coarsely on the pressing surface and a region in the vicinity thereof, and more densely on the adhesive surface side of the pressing surface. 2. In manufacturing a brake lining containing a wear-resistant metal filler, one surface of which is a pressing surface against a braked member, and the surface opposite to the pressing surface is an adhesive surface to a backing plate, the above-mentioned magnetic material is used. When preparing a lining material containing a metal filler and then performing a molding operation on the lining material, a magnetic force is applied from the adhesion surface side to cause the metal filler to be applied to the pressing surface and the area near it. A method for manufacturing a brake lining, characterized in that the linings are dispersed coarsely and densely on the adhesive surface side of the area.