JPS58203238A - Brake pad - Google Patents

Abstract

PURPOSE:To reduce thermal distorsion and manufacturing and assembling processes by dividing a friction material of sintered alloy into a plurality of segments having the same shape and by welding them onto a steel board via a positioning means. CONSTITUTION:Raw material compound of bronze friction material is uniformly mixed, poured in a metal mold and pressed to form molded elements 1 having the same shape. The molded elements 1 are fit on a copper-plated steel board 3 in parallel arrangement so that two projections a formed in position on the back face of each of the molded elements 1 are engaged in corresponding mounting recesses 3a on the board 3, and is thereafter sintered in the non-oxidative atmosphere by the ordinary method to provide a brake pad. Smaller segments of the friction material of sintered alloy will provide lower effect of a bimetal, namely, less distorsion, but many segments are the cause for trouble of many manufacturing processes. The reasonable number of the segments is two to five. A suitable spacing between each segment may be 1 to 3 millimeters.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a driver pad used in a disk driver system for automobiles, motorcycles, etc.

In recent years, as automobiles and other vehicles have become faster, it has become more common to use the ``Zushi 10'' at high speeds, and the number of times that the ``Zushi 10'' has been used during traffic jams has also increased. Accordingly, the performance required of friction rollers is increasing, and materials with a wide range of compositions, from resistive materials to sintered alloy materials, are being used as friction materials. In general, a sintered metal pad that uses a sintered alloy material as a friction material is produced by pressure-sintering a sintered alloy molded body whose main component is bronze on a steel substrate, thereby joining the two together. has been done. However, since the steel substrate and the bronze-based sintered alloy have different coefficients of thermal expansion, distortion or deformation occurs due to the so-called "bimetallic effect" both during the manufacturing process of the Fushi-ten pad and during use.

In view of the current situation, the present inventor has conducted various studies and found that when a sintered alloy friction material is divided into a plurality of pieces and pressure sintered on a steel substrate, the above-mentioned bimetallic The distortion of the cow pad due to the effect can be substantially reduced;
In addition, it is advantageous to form the reinisig into the same shape by forming it into a single processed sheet compared to the case where the reinisig is formed into different shapes. In some cases, the positioning method and assembly method for each linen with respect to the board can be set to a single method for the holes, which greatly reduces the number of man-hours required for assembling the positioning means and the entire pad.
We discovered that it is possible to reduce the appearance by 11. That is, the present invention provides a brake pad in which a sintered alloy friction material is bonded to a steel substrate by pressure lighting, in which the sintered alloy V friction material is divided into a plurality of pieces 11iIiI of the same shape, and each A plater characterized in that a retaining means for positioning is provided protrudingly at the same predetermined position on the back surface of the divided piece, and is fitted into a corresponding engagement part provided on a steel substrate to join it to the steel substrate. This is related to pads.

The present invention will be described in detail below with reference to the embodiment shown in page 1'21.

FIG. 1 is a front view showing an example of the rubber pad according to the present invention, FIG. 2 is a bottom view thereof, and FIG.
It is a sectional view along the A line. First, the raw material mixture for bronze-based friction materials is mixed uniformly and molded into dragons (molded bodies of the same shape (1)).
, 11) is obtained. As raw materials for friction materials, all bronze-based materials conventionally used in Karazure + pads can be used, and there are no particular limitations, but (+) 2
60-87 parts by weight of copper up to 00 mesh, (itl 2
5 to 10 parts by weight of tin not more than 00 mesh, (jiD sr
-02, At2O3, ZrO2, metal oxide powder of 80 mesh or less consisting of two or more types of composite oxides such as 2 to IO parts by weight, (IV) disulfide,
Metal sulfide powder 1 to 100 meshes or less consisting of one or more of disulfide sulfide, iron sulfide, sulfide steel, etc.
An example thereof is a total of 100 parts by weight of 5 parts by weight and 5 to 15 parts by weight of graphite powder having an M24 mesh or less.

Incidentally, copper and tin may be prepared in advance as bronze and crushed before use. Next, 10 to 2
On a steel substrate (3) on which a copper plating of about 0 μm was formed, the molded bodies (1+) having the same shape as described above (protrusions (1α) and (lα) formed at two predetermined places on the back surface of each V-shape were placed on the substrate (3). After fitting into the corresponding locking recesses (3α) of 3) and placing them side by side, they are sintered according to a conventional method in a non-oxidizing atmosphere such as nitrogen scum and reed-top decomposition gas. , a bonding pad with a small amount of distortion during use can be obtained by a single route with an extremely small number of processing steps.

FIGS. 4 and 5 are a front view and a bottom view showing another example of the relay pad according to the present invention. This embodiment consists of a molded body (1') of the same shape divided into three parts, each having positioning protrusions (1'α) and (1'α) formed on its back surface, respectively;
(l') , (Other than the use of white, there is no difference from the Zureshi pad shown in Figures 1 and 2.

In the present invention, the smaller the sintered alloy friction material is divided, the more the "bimetallic effect" occurs and the amount of strain or deformation decreases. However, as the number of divided pieces increases, the number of manufacturing steps increases, so from a practical point of view,
The number of divided pieces was about 2 to 5.Example 1 After uniformly mixing the mixture consisting of the raw materials shown in Table 1, it was filled into a mold and molded into the same predetermined shape at a molding pressure of 4 tOrL/-.

Table 1 The above molded body was placed on a steel substrate coated with copper plating (10 μnL) and sintered in a nitrogen atmosphere.

Attach the obtained Tazure + Bad to the motorcycle, 6Q
kv, 7. / After collecting and returning the sudden 111'l"fl from 50 times, the amount of strain was measured.When measuring the amount of strain, They were stacked in such a manner that the maximum gap in the center, 5, was taken as the amount of strain.

The results are shown in Table 2.

From the results shown in Table 2, it is clear that the wire + pad according to the present invention has a strain amount of 0.1 W or less, and is extremely advantageous in practice.

As is clear from the above, in the present invention, the friction material made of ψ alloy is divided into a plurality of pieces having the same shape, and a positioning retainer is provided protruding from a predetermined position on the back surface of each divided piece. Since the fitting means is fitted into the corresponding locking part provided on the steel substrate and the two are joined, it is possible not only to greatly reduce the amount of thermal distortion, but also to greatly reduce the number of processing and assembly steps. It became possible to reduce the amount to

[Brief explanation of the drawing]

1 and 2 are a front view and a bottom view showing an example of a relay + pad according to the present invention, and FIG. 3 is an A-A of No. 11E71.
FIGS. 4 and 5 are a sectional view taken along a line, FIGS. 4 and 5, and a front view and a bottom view showing other aspects of the player's pad of the present invention. +1+ and (1')... Molded body made of friction material (
1α), (1'α)... Protrusion (3)...
...One board (3α) ...Latching recess (and more) Agent Patent attorney Eiji Saegusa Figure 3 Figure 4

Claims (1)

[Claims] ■ - In the player pad in which the sintered alloy friction material is bonded to the substrate by pressure sintering, the sintered alloy friction material is marked with a public stamp 1 on multiple pieces of the same shape, and the designated area is placed on the back of each divided piece. A mounting pad characterized in that a retaining means for positioning is provided protrudingly at the same location on the steel base plate, and the retaining means for positioning is fitted into a corresponding locking part that serves as a steel base plate so as to be brought into contact with the steel base plate.