JPH0468495B2 - - Google Patents

Description

Detailed Description of the Invention A. Purpose of the Invention (1) Industrial Field of Application The present invention relates to friction members used in brakes such as vehicle disc brakes and drum brakes, and particularly to fixing holes formed in a back plate. , relates to a friction member in which a part of the lining is bitten, and a method for manufacturing the same.

(2) Prior Art Conventionally, as this type of friction member, one in which the lining contains wear-resistant fibers is known (see Japanese Patent Laid-Open No. 57-94140).

(3) Problems to be Solved by the Invention In the friction member, a large shearing force acts on the biting portion of the lining into the fixing hole during braking operation, but the conventional friction member has no resistance to the shearing force. No special consideration has been given to this.

In view of the foregoing, the present invention provides the friction member and the friction member, in which the biting part of the lining into the fixing hole and the vicinity thereof are reinforced with fibers using wear-resistant fibers, so that the biting part and the like have a large shear strength. The purpose is to provide a manufacturing method.

B. Structure of the Invention (1) Means for Solving the Problems The present invention provides a brake friction member in which a part of the lining is bitten into a fixing hole formed in a back plate. The abrasion-resistant fibers included in the lining are oriented in the biting part of the lining and in the vicinity thereof so that the fiber axes thereof are substantially parallel to the center line of the fixing hole.

Further, in manufacturing a brake friction member in which a part of the lining is bitten into a fixing hole formed in a back plate, the present invention prepares a lining material containing magnetic wear-resistant fibers, and then The lining material and the back plate are polymerized to form the lining by compression molding, and a part of the lining is bitten into the fixing hole of the back plate, and during this compression molding, the fixing hole and its vicinity are , by generating a magnetic flux extending in the direction of the center line of the fixing hole, the abrasion resistant fibers are moved at the part where the lining bites into the fixing hole and in the vicinity thereof, so that the fiber axis thereof is approximately parallel to the center line of the fixing hole. It is characterized by being oriented in parallel.

(2) Effects According to the friction member, the part where the lining bites into the fixing hole of the back plate and the vicinity thereof are reinforced by wear-resistant fibers and have a large shear strength, so that the part where the lining bites into the fixing hole of the back plate has a large shear strength. Even if a large shearing force is applied to the part, that part will not be sheared.

Further, according to the manufacturing method, the wear-resistant fibers can be easily oriented in the direction by magnetic flux, thereby making it possible to easily and reliably obtain the friction member.

(3) Embodiment Figures 1 to 3 show friction member 1 for a disc brake.
The friction member 1 consists of a back plate 2 suspended by a hanger pin, and a lining 3 bonded to the back plate 2. A portion of the lining 3 digs into a pair of fixing holes 4 formed in the back plate 2, thereby forming a pair of convex biting parts 5 on the back surface of the lining 3.

The lining 3 includes steel fibers f as wear-resistant fibers having magnetism, and the steel fibers f have an average diameter of 59 μm (maximum diameter 109 μm, minimum diameter 10 μm).
m), with a length of 2 to 3 mm.

As clearly shown in FIG. 3, in each biting part 5 and its vicinity, the steel fibers f are oriented with their fiber axes substantially parallel to the center line of the fixing hole 5. Since the vicinity is reinforced by steel fibers f and possesses large shear strength,
Even if a large shearing force acts on each biting portion 5 due to a braking operation, that portion will not be sheared.

FIG. 4 shows an apparatus for manufacturing the friction member 1. As shown in FIG. The device includes a steel base 7 having a convex portion 6, and a steel intermediate plate 10 which is supported by the base 7 via a plurality of springs 9 with a hole 8 slidably fitted into the convex portion 6. and a press body 11 that is disposed above the intermediate plate 10 and is movable up and down. A cavity c for molding the lining 3 is defined by the hole 8 of the intermediate plate 10 and the top surface of the convex part 6.

The pressing body 11 includes a frame member 12 and a pair of electromagnets 13 attached to the frame member 12. Each electromagnet 13 has an iron core 14 whose tip is inserted into the fixing hole 4 of the back plate 2, and a pair of electromagnets 13 attached to the frame member 12. 14 and each coil 15 is connected to a power source 17 via a switch 16.

In manufacturing the friction member 1, the steel fiber f,
A paste-like lining material m containing a phenolic resin or the like is prepared, and after the pressing body 11 is raised, the lining material m is put into the cavity c, and the back plate 2 is polymerized on top of the lining material m.

Then, the pressing body 11 is lowered to insert the tip of each iron core 14 into each fixing hole 4 of the back plate 2, and the frame member 12 is superimposed on the back side of the back plate 2, and the lining material m is applied through the back plate 2. Compress. The lining 3 is molded by this compression molding, and the lining 3
A part of the fixing hole 4 bites into each fixing hole 4, and a biting part 5 is formed.

During the compression molding, the switch 16 is closed and each electromagnet 13 is energized to generate a magnetic flux extending in the direction of the center line of each fixing hole 4 and its vicinity. Due to this magnetic flux, the steel fibers f existing in each biting portion 5 and the vicinity thereof are oriented so that their fiber axes are substantially parallel to the center line of the fixing hole 4.

After the compression molding, the lining 3 and the back plate 2 are removed from the cavity c, and the lining 3 is cured by heating and bonded to the back plate 2.

By using magnetic flux in this manner, the friction member 1 in which the steel fibers f are oriented in the above direction can be easily and reliably obtained.

C. Effects of the Invention According to the friction member according to the present invention, the biting portion of the lining into the fixing hole of the back plate and the vicinity thereof are made of wear-resistant fibers oriented with the fiber axes substantially parallel to the center line of the fixing hole. Since it is reinforced, a large shear strength can be maintained in the biting part and its vicinity, which is effective in improving the durability of the lining.

Further, according to the manufacturing method according to the present invention, the wear-resistant fibers can be easily oriented in the direction by magnetic flux, thereby making it possible to easily and reliably obtain the friction member.

[Brief explanation of the drawing]

Figures 1 to 3 show the friction member, Figure 1 is a front view, Figure 2 is a sectional view taken along the line of Figure 1, Figure 3 is an enlarged view of the part indicated by the arrow in Figure 2, and Figure 4 is a friction member. FIG. 2 is a longitudinal cross-sectional view of the member manufacturing apparatus. f... Steel fiber as wear-resistant fiber, m... Lining material, 2... Back plate, 3... Lining,
4...fixing hole, 5...biting part, 13...electromagnet.

Claims (1)

[Scope of Claims] 1. In a brake friction member in which a part of the lining is bitten into a fixing hole formed in a back plate, the lining is partially bitten into the fixing hole at the part where the lining bites into the fixing hole and in the vicinity thereof. A friction member for a brake, characterized in that the wear-resistant fibers contained therein are oriented such that their fiber axes are substantially parallel to the center line of the fixing hole. 2. When manufacturing a brake friction member in which a part of the lining is bitten into the fixing hole formed in the back plate, a lining material containing magnetic wear-resistant fibers is prepared, and then the lining material and The back plate is polymerized and the lining is formed by compression molding, and a part of the lining is bitten into the fixing hole of the back plate, and during this compression molding, the fixing hole is formed in the fixing hole and its vicinity. generate a magnetic flux extending in the direction of the center line of the abrasion resistant fibers at and in the vicinity of the biting part of the lining into the fixing hole so that the fiber axis thereof is substantially parallel to the center line of the fixing hole. A method of manufacturing a friction member for a brake, which comprises orienting the friction member.