JPH01131338A - Lining for brake and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve the initial conformability for a member to be braked by dispersing metallic fillers respectively so as to be thin in the region of a pressing surface and the neighborhood thereof, and to be thick in the region nearer to the bonding surface side than the above region. CONSTITUTION:A friction pad 1 for a disk brake comprises a lining plate 2 being suspended by hanger pins and a lining 4 having been adhered to the lining plate 2 via a bonding surface 3. The lining 4 contains steel fibers f as an abrasion-resistant metallic filler having magnetism. The steel fibers f are dispersed respectively so as to be thin in the region r of a pressing surface 6 and the neighborhood thereof, and to be thick in the region nearer to the bonding surface 3 side than the above region r. Thus, the initial conformability for the member to be braked can be improved.

Description

Detailed Description of the Invention A0 Object of the Invention (1) Industrial Field of Application The present invention relates to a brake lining, in particular, it contains a wear-resistant metal filler, and one side is used to press against a braked member such as a brake disc or a brake drum. The present invention relates to a lining in which the surface opposite to the pressing surface is an adhesive surface to a backing plate, and a method for manufacturing the same.

(2) Conventional technology Conventionally, in this type of lining, the metal filler has been dispersed almost evenly throughout the lining (Japanese Patent Laid-Open No. 57-94
(See Publication No. 140).

(3) Problems to be Solved by the Invention However, with the above structure, 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.

B0 Structure of the Invention (1) Means for Solving Problems The present invention includes a wear-resistant metal filler, one side of which is a pressing surface for a braked member, and the opposite side of the pressing surface 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. A lining material containing the magnetic metal filler is prepared, and then when the lining material is subjected to a molding operation, a magnetic force is applied from the adhesive surface side to spread the metal filler onto the pressing surface and its surface. It is characterized in that it is distributed coarsely in nearby areas and densely on the adhesive surface side of the area.

(2) Effect According to the above-mentioned lining, the amount of metal filler dispersed in the pressing area and the area near it is smaller than the initial amount, so the wear resistance of the area is reduced accordingly, and this causes the lining to be hardened against the braked member. Good initial conformability can be achieved.

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

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, in which the friction pad 1 is attached to a back plate 2 suspended on a hanger bin, 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 brake member.

The lining 4 contains steel fibers f as a magnetic wear-resistant metal filler, the steel fibers r having an average diameter of 59
μm (maximum diameter 109 μm, minimum diameter 10 am), length 2-3III11.

As clearly shown in FIG. 3, the steel fibers r are coarse in the pressing surface 6 and the region r in its vicinity, and are more densely distributed in the region closer to the bonding surface 3.

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.

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

FIG. 4 shows a compression molding apparatus for the lining 4. The device consists of a base 7 having a flat upper surface, a die 9 that is erected on the upper surface of the base 7 and has a die hole 8 having the same shape as the lining 4, and a die 9 that is slidably fitted into the die hole 8. A punch 10 that is combined to form a pressing surface 6 is provided. The die 9 includes a die body 12 having a pair of legs 11, and a magnetic block 13 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.

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. Thereby, the magnetic block 13 and the coil 14 constitute an electromagnet 17.

In manufacturing the lining 4, a paste-like lining material m containing the steel fiber r, phenolic resin, etc. is prepared, and after raising the punch 1o, the lining material m is put into the die hole 8, and the lining +, t punch 10
The lining 4 is compression-molded by pressing.

During the compression molding, for example, switch 1 is pressed before starting the molding operation.
5 is closed and the electromagnet 17 is energized until the end of the forming operation, and a magnetic force is applied to the steel fibers f in the lining material m to attract the steel fibers r 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.

C0 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, it is possible to provide a lining with excellent durability.

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 the drawing]

Figures 1 to 3 show the friction pad, and Figure 1 is the front view.
Figure 2 is a cross-sectional view of Figure 1 - ■, Figure 3 is Figure 2 ■
FIG. 4, which is an enlarged view of the part indicated by the arrow, is a longitudinal sectional view of the lining forming device. f...Steel fiber as metal filler, m...Lining material, "...area, 2...back plate, 3...adhesive surface, 4...lining,
Brake disc as a braked member, 6...
Pressure surface, 17...Electromagnet patent applicant Kendo Ochiai, patent attorney representing Nissin Kogyo Co., Ltd. 1) Takahide Naka Figure 3 Figure 1 Figure 2

Claims (2)

[Claims] (1) A brake lining containing a wear-resistant metal filler, one surface of which is a pressing surface for a braked member, and the surface opposite to the pressing surface that is an adhesive surface to a backing plate, in which the metal filler is A lining for a brake, characterized in that the lining is coarsely distributed on the pressing surface and a region in the vicinity thereof, and densely distributed on the adhesive surface side of the pressing surface. (2) When manufacturing a brake lining that contains a wear-resistant metal filler and has one side as a pressing surface against the braked member and the opposite side to the pressing surface as an adhesive surface to the back plate, magnetic When a lining material containing the metal filler is prepared, and then the lining material is subjected to a molding operation, a magnetic force is applied from the adhesive surface side to cause the metal filler to form on the pressing surface and its vicinity. A method for producing a brake lining, characterized in that the particles are dispersed roughly in the region and densely on the adhesive surface side of the region.