JP2010210009A - Method for manufacturing brake pad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a brake pad improving manufacturing efficiency. <P>SOLUTION: Since the disc brake pad 1 is formed by integrally forming an annular collar part 7 with a larger diameter than an inner diameter of a through-hole 4 of a back plate 2 on an outer circumference of an impermeable member 5, and heating/pressing a lining material 3 preformed into a plate shape to the back plate 2 after inserting a disk-like body 6 of the impermeable member 5 into the through-hole 4 of the back plate 2 and fixing the annular collar part 7 to the back plate 2 by an adhesive 8, displacement of the impermeable member 5 to the through-hole 4 of the back plate 2 is prevented during the heating/pressing of the back plate 2 and the lining material 3. By this, the manufacturing efficiency of the disc brake pad 1 is improved. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a brake pad.

  As a prior art, Patent Document 1 discloses a friction material in which a water-impermeable member is disposed in a through hole of a back metal and a method for manufacturing the friction material.

JP-A-2-292535

  However, in this type of friction material, when the non-permeable member is integrally formed with the lining layer, the non-permeable member is displaced, and the through-hole of the back plate is formed during heating / compression of the lining layer and the back plate. The impermeable member cannot be accurately inserted, and the work may become complicated.

  This invention is made | formed in view of this point, and it aims at providing the manufacturing method of the brake pad which improves manufacturing efficiency.

  As means for solving the above-mentioned problems, the invention described in claim 1 of the present invention includes a plate-like back metal having a through-hole in the thickness direction, and a metal material that is heated and pressure-bonded to the back metal. In the brake pad manufacturing method of integrally forming a lining material and a disc-shaped water-impermeable member disposed in the through-hole of the back metal, the outer diameter of the water-impermeable member is larger than the inner diameter of the through-hole. The projecting portion is integrally formed, and the water-impermeable member is inserted into the through hole of the back metal and fixed to the back metal by the projecting portion, and then the plate-shaped lining material is heated against the back metal. It is characterized by being crimped.

  In the brake pad manufacturing method of the present invention, manufacturing efficiency can be improved.

1A and 1B are views showing a brake pad manufactured in the present embodiment, wherein FIG. 1A is an external view showing the appearance of a back metal, and FIG. 1B is a cross-sectional view taken along line XX of FIG. FIG. 2A is a side view of the water-impermeable member, and FIG. 2B is a plan view of the water-impermeable member. FIG. 3 is a view showing a state in which the back metal and the lining material to which the water-impermeable member is fixed are heated and pressure-bonded by a pressurizing facility. FIG. 4 is a cross-sectional view showing a state in which a water-impermeable member is fixed to each through hole of the back metal. FIG. 5 is a flowchart showing the order of a conventional method for manufacturing a brake pad. FIG. 6 is a flowchart showing the sequence of the brake pad manufacturing method according to this embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to FIGS.
As shown in FIG. 1, a disc brake pad 1 employing a brake pad manufacturing method according to an embodiment of the present invention includes a plate-like back metal 2 having through holes 4 in the thickness direction, and the back metal 2. A lining material 3 including a metal material to be heated and pressed and a substantially disk-shaped water-impermeable member 5 disposed in the through hole 4 of the back metal 2 are integrally formed.

  The back metal 2 is composed of a metal plate, and a plurality of circular through holes 4 (two in the figure) are formed in the thickness direction as shown in FIG. The lining material 3 is, for example, a fibrous material such as steel fiber, brass fiber, copper fiber, aramid fiber, acrylic fiber, phenol fiber, alumina silica fiber, rock wool fiber, potassium titanate fiber, carbon fiber, phenol resin, epoxy Thermosetting resins such as resins, melamine resins and cashew resins, binders containing rubber compositions such as NBR and SBR, organic friction modifiers such as friction dust, inorganic friction modifiers such as barium sulfate, graphite and antimony trisulfide Etc. are used, and metal powder such as brass, brass, copper, etc. is further added as necessary, and is formed into a plate shape as shown in FIG.

  The water impermeable member 5 is preferably a resin of the same type as the resin contained in the lining material 3, and a thermosetting resin such as a phenol resin is used. As shown in FIG. 2, the water-impermeable member 5 includes a disc-shaped main body 6 and an annular flange portion as a projecting portion integrally projecting outward from the outer periphery on the lower end side of the disc-shaped main body 6. 7 to form a hat shape. The outer diameter of the disc-shaped main body portion 6 of the water-impermeable member 5 is substantially equal to the inner diameter of the through hole 4 of the back metal 2, and the outer diameter of the annular flange 7 is larger than that of the through hole 4 of the back metal 2. Formed. On the other hand, the axial length of the disc-shaped main body 6 of the water-impermeable member 5 is set shorter than the axial length of the through hole 4. Further, the lower end surface 9 including the annular flange 7 of the disc-shaped main body 6 is formed flat. In the present embodiment, the annular flange 7 corresponds to the protruding portion of the present invention.

  Next, a method for manufacturing the above-described disc brake pad will be described. Here, as shown in FIG. 3, the pressurization equipment for heating and press-bonding the back metal 2 and the lining material 3 to manufacture the brake pad 1 includes a mounting table 11 on which both ends of the back metal 2 are mounted. The inside of the mounting table 11 and the preformed lining material 3 are placed, the lower mold 13 that presses the back metal 2 and the lining material 3 from below, and the inside of each through hole 4 of the back metal 2 It has a disk-like projection 14 inserted into the upper part 12 and is roughly constituted by an upper mold 12 that pressurizes the back metal 2 and the lining material 3 from above. The upper mold 12 and the lower mold 13 are heated by a heating device (not shown).

  Here, the manufacturing method of the brake pad shown by patent document 1 is demonstrated based on the work flow of FIG. In the manufacturing method of a brake pad, after processing a back metal and a lining material separately, both are heated and pressure-bonded.

  First, in the processing of the back metal, in step S11, a through hole is formed in the thickness direction with respect to the back metal that is formed by punching a steel material to form an outer shape. In step S12, cleaning is performed to remove oil, and in step S13, an adhesive is applied to the lining adhesive surface, which is one side of the back metal, and the adhesive applied in step S14 is dried.

  Next, in the processing of the lining material, after stirring the friction material such as the fibrous material, the thermosetting resin, the binder, the friction modifier, and the additive in step S21, the material is put into a preforming mold, After the hemispherical ball-type water-impermeable member is disposed in step S22, the friction agent is fired and preformed in step S23.

  After the back metal and the lining material each processed as described above are arranged in the pressurizing equipment in step S31 while aligning the position of the non-permeable member integrated with the lining material and the through hole of the back metal. In step S32, the lining material and the back metal are heated and pressed to form a brake pad. As described above, in the conventional manufacturing method described above, the alignment operation in step S31 is complicated, and if a displacement occurs, the through hole of the back metal is not covered when the lining material and the back metal are heated and pressed. There is a possibility that the work becomes complicated because the water-permeable member cannot be accurately inserted. In addition, since it is necessary to align the position inside the pressurizing facility, careful attention is required to ensure the safety of the worker, resulting in a decrease in work efficiency.

  In view of the problems of the conventional brake pad manufacturing method, in the brake pad 1 manufacturing method according to the present embodiment, the brake pad is manufactured by the process shown in the work flow of FIG.

  In the manufacturing method of the brake pad 1 in the present embodiment, the processing up to step S13 is performed in the same manner as the work flow of FIG. 5 as the processing of the back metal 2, and the lining material 3 is bonded to the lining material bonding surface of the back metal 2 in step S13. After the adhesive material 8 is applied, the disc-shaped main body 6 of each water-impermeable member 5 is inserted into each through-hole 4 of the back metal 2 from the adhesive application surface side in step S104, and The annular flange 7 is brought into contact with the adhesive material application surface of the back metal 2, and the respective water-impermeable members 5 are fixed to the back metal 2 with the adhesive material 8. In the present embodiment, for example, a phenol resin adhesive is used as the adhesive 8 for bonding the lining material 3. Thereafter, the adhesive 8 applied to the back metal 2 in step S14 is dried.

  Regarding the processing of the lining material 3, the step S <b> 22 of FIG. 5 is eliminated and the lining material 3 is formed simply by preforming a friction agent.

  Next, in step S301, as shown in FIG. 3, both ends of the back metal 2 to which each of the water-impermeable members 5 is fixed are pressurized so that the annular flange 7 of the water-impermeable member 5 faces downward. On the mounting table 11. Subsequently, the preformed lining material 3 is placed on the upper surface of the lower mold 13. In FIG. 3, illustration of the eight layers of the adhesive applied to the lower end surface of the back metal 2 is omitted.

  Next, in step S32, the upper mold 12 and the lower mold 13 are moved in the direction of the arrow in FIG. 3 to heat and press the backing metal 2 including the respective water-impermeable members 5 and the lining material 3, The disc brake pad 1 is formed by joining the lower end surface 9 of the water-impermeable member 5 and the lining material 3.

  As described above, according to the method for manufacturing the disc brake pad 1 according to the embodiment of the present invention, before the back metal 2 and the lining material 3 are heated and pressure-bonded, the through holes 4 of the back metal 2 are formed in advance. The disc-shaped main body 6 of the water-impermeable member 5 is inserted, and the annular flange portion 7 of the water-impermeable member 5 is fixed to the lining material bonding surface of the back metal 2 with the adhesive material 8. Since the back metal 2 and the lining material 3 to which the 5 is fixed are heated and pressure bonded, when the back metal 2 and the lining material 3 are heated and pressure bonded, the misalignment of the water-impermeable member 5 to the through hole 4 of the back metal 2 Will not occur. Thereby, the manufacturing efficiency of the disc brake pad 1 can be improved.

  Moreover, the through hole 4 of the back metal 2, specifically, the opening of the through hole 4 on the side of the lining material 3 is closed by the annular flange 7 of the water-impermeable member 5, so that the lining material 3 is not exposed to the outside air. 3 can be improved.

  Furthermore, since it is not necessary to perform alignment within the pressurizing facility, there are fewer precautions for ensuring the safety of the worker than in the past, and work efficiency can be improved.

  In the present embodiment, the water-impermeable member 5 is provided with the annular flange portion 7 integrally projecting outward on the entire circumference of the outer periphery of the one surface of the disk-shaped main body portion 6. You may comprise the protrusion part of this invention by providing intermittently in the circumferential direction.

  DESCRIPTION OF SYMBOLS 1 Brake pad, 2 Back metal, 3 Lining material, 4 Through hole, 5 Water-impermeable member, 6 Disc-shaped main-body part, 7 Annular collar part (protrusion part), 8 Adhesive material, 9 Lower end surface (one end surface), 11 Stand

Claims (5)

A plate-like back metal having a through-hole in the thickness direction, a lining material containing a metal material that is heated and pressure-bonded to the back metal, and a disk-shaped non-permeable member disposed in the through-hole of the back metal In the manufacturing method of the brake pad to be integrally molded,
After integrally forming a protrusion having a diameter larger than the inner diameter of the through-hole on the outer periphery of the water-impermeable member, and inserting the water-impermeable member into the through-hole of the back metal and fixing the protrusion to the back metal, A method of manufacturing a brake pad, comprising heating and pressure-bonding the lining material formed into a plate shape to the back metal.   The projecting portion of the water-impermeable member is configured to project in a bowl shape from the outer periphery on one end side of the water-impermeable member, and the non-permeable member is fixed to the back metal on the one end surface of the back metal. 2. The method of manufacturing a brake pad according to claim 1, wherein after the adhesive material for adhesion is applied, the protruding portion of the water-impermeable member is brought into contact with and fixed to one end surface of the back surface.   The protrusion part of the said water-impermeable member closes the through-hole of the said back metal, and is couple | bonded with the said lining material after the heating and press-fit to the back metal of the said lining material. Brake pad manufacturing method.   The brake pad manufacturing method according to claim 1, wherein one end surface of the water-impermeable member is formed flat.   The brake pad manufacturing method according to claim 1, wherein the back metal is placed on a pressurizing facility in a state where the water-impermeable member is fixed to a through hole of the back metal.

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