WO2008068846A1

WO2008068846A1 - Disk brake pad, backing metal for pad, and method of manufacturing backing metal for pad

Info

Publication number: WO2008068846A1
Application number: PCT/JP2006/324250
Authority: WO
Inventors: Katsuhiro Yamamoto
Original assignee: Yamamoto Seisakusho Co., Ltd.
Priority date: 2006-12-05
Filing date: 2006-12-05
Publication date: 2008-06-12

Abstract

To provide a backing metal for pad of which the rigidity in the thickness direction can be remarkably increased without increasing a plate thickness and the strength of it adhesion to a friction member can be remarkably increased; and a method of manufacturing the backing metal. In the backing metal having a mounting surface (10a) for mounting the friction member (9) and used for a disk brake pad, the surface (10b) of the backing metal on the opposite side of the mounting surface (10a) is pressed by a pressing member to form projections (12) projecting to the friction member (9) side in a substantially entire area of the mounting surface (10a). At least a part of the projections are arranged in different directions in the mounting surface (10a).

Description

Specification

Disc brake pad, pad backing, and method of manufacturing pad backing

The present invention relates to a disc brake pad incorporated in a disc brake used for braking an automobile, a railway vehicle, an industrial machine, or the like.

The present invention also relates to a pad back metal that supports a friction member of a disc brake pad and a manufacturing method thereof.

Background art

[0002] A general disc brake used in an automobile or the like is a disc-shaped brake disc that is attached to the rotating axle side and rotates together with the axle, and a brake disc that is attached to the vehicle main body side. And a caliper that sandwiches the peripheral edge from both sides. The caliper is provided with a pair of disc brake pads that are arranged to face each other with a gap between them. This disc brake pad includes a flat plate-shaped pad back metal and a friction member, and one flat surface of the pad back metal is attached to the caliper side, and the other surface of the pad back metal is organic. A composite friction material is attached through an adhesive.

[0003] The above-described caliper is configured such that when the driver depresses the brake pedal, the brake disc is sandwiched from both sides by hydraulic pressure. As a result, the brake disk on which the friction member rotates is pinched, the rotational kinetic energy of the brake disk is converted into frictional heat, and the rotation speed of the brake disk, that is, the rotation speed of the axle is reduced.

[0004] In such a disc brake, the braking force of the brake acts directly on the disc brake pad. More specifically, the braking force generated by the sliding of the brake disc and the friction member acts as a shearing force in the thickness direction of the pad back metal. In addition, a force to peel the pad back metal force friction member in the sliding direction acts on the bonding portion between the pad back metal and the friction member. Furthermore, when the friction member is not properly in contact with the brake disc (such as when the friction member is partially worn or is in contact with one side), the pad back metal force friction member is peeled off. Force in the direction (substantially perpendicular to the sliding surface of the friction member) Works.

Disclosure of the invention

Problems to be solved by the invention

[0005] The braking characteristics of automobiles and the like are increasing year by year due to the improvement of the friction performance of the friction member, and the shearing force acting on the back metal for the node and the force acting on the adhesive portion are also increasing. In order to increase the rigidity of the backing metal for the knot, for example, if the thickness of the backing metal for the pad is increased, the material cost increases, the weight increases, and the disc brake increases in size.

In addition, since the disc brake pad is an important safety part in automobiles and the like, it is necessary that the pad backing metal and the frictional member have an adhesive strength that is more difficult to peel off. If the bonding area is increased to increase the adhesive strength, the material cost increases and the weight increases as the area increases. Similarly, the disc brake becomes larger.

[0006] The present invention has been made in view of the above-described circumstances, and can significantly increase the rigidity in the thickness direction without increasing the plate thickness, and can improve the adhesive strength with the friction member. It is an object of the present invention to provide a pad back metal that can be manufactured and a method for manufacturing the pad back metal. It is another object of the present invention to provide a disc brake pad using the pad back metal.

Means for solving the problem

[0007] The present invention is a pad back metal used for a disc brake pad provided with a mounting surface to which a friction member is mounted. The surface opposite to the mounting surface is pressed with a pressing member, and the mounting surface is substantially omitted. A plurality of projections projecting toward the friction member are formed over the entire area, and at least a part of the projecting force is arranged in different directions in the mounting surface. According to this configuration, even when a force for peeling the friction member is applied, it is easier to catch the friction member than the end portions of the protrusions arranged in different directions compared to the case where the ends are arranged in the same direction. Become.

In this case, the plurality of protrusions may be formed in the same form.

According to this configuration, the type of dowel punch for forming the protrusion can be reduced to one.

[0009] Further, the plurality of protrusions have a substantially elliptical shape, and the protrusion has a substantially elliptical shape. It may be arranged with the longitudinal axis tilted.

According to this configuration, the protrusions can be freely arranged in accordance with the shape of the pad back metal.

[0010] Furthermore, the substantially elliptical protrusions may be arranged so as to be substantially orthogonal.

According to this configuration, even when a force for peeling off the friction member is applied, the end of the substantially elliptical protrusion is reliably engaged with the friction member.

[0011] Furthermore, the plurality of protrusions may be formed in different types of forms.

According to this configuration, even when a force for peeling off the friction member is applied, the friction member is pulled with respect to the friction member as compared with the case where one of the ends of the protrusions having different forms is formed in the same form. The possibility of applying force increases.

[0012] Further, the plurality of protrusions may be formed by progressive feeding using a fine blanking press.

According to this configuration, the pad backing metal can be prevented from being deformed, and burrs can be prevented from being generated on the friction member mounting surface as compared with the case where it is formed by general press working or the like, and the friction member mounting surface is highly accurate. It can be manufactured to have a flatness.

[0013] On the other hand, a manufacturing method of a pad back metal used for a disc brake pad having a mounting surface to which a friction member is mounted, the surface opposite to the mounting surface being pressed with a pressing member, A plurality of protrusions protruding toward the friction member are formed over substantially the entire area, and at least a part of the protrusions are arranged in different directions in the mounting surface, and the plurality of protrusion forces Fine blanking It can be formed by progressive feeding with a press.

In this case, the plurality of protrusions may be formed by progressive feeding by a fine blanking press.

[0014] On the other hand, a disc brake pad having a pad backing with a mounting surface to which a friction member is attached, wherein the surface opposite to the mounting surface is pressed with a pressing member, and the mounting surface extends over substantially the entire area. A plurality of protrusions that protrude toward the friction member may be formed, and at least some of the protrusions may be arranged in different directions in the mounting surface.

According to this configuration, in the state where the friction member is attached to the friction member attachment surface, the protrusion The disc brake pad can be configured so that is located inside the friction member.

[0015] In this case, the plurality of protrusions may be formed by progressive feeding by a fine blanking press.

The invention's effect

[0016] According to the present invention, a pad back metal used for a disc brake pad having a mounting surface to which a friction member is mounted, the surface opposite to the mounting surface being pressed with a pressing member, A plurality of protrusions that protrude toward the friction member are formed over substantially the entire surface, and at least a part of the protrusions are arranged in different directions in the mounting surface, so that the friction member is peeled off. Even if a force is applied, the end portions of the protrusions arranged in different directions are more easily engaged with the friction member than in the case where the ends of the protrusions are arranged in the same direction. Therefore, even if a larger force is applied to peel off the friction member, it can be made difficult to peel off.

In addition, the protrusions extending over almost the entire area of the mounting surface realize a firm engagement up to the peripheral edge of the friction member, and can counter the braking force that attempts to peel and Z or peel the friction member.

In addition, the strength of the pad back metal in the plate thickness direction increases substantially on average throughout the back metal, and it can counter large shear stress without increasing the plate thickness of the pad back metal. The material cost of the back metal can be reduced, and furthermore, since the amount of the friction member used can be reduced by the volume of the plurality of protrusions, the material cost of the friction member can be reduced. On the other hand, since the thickness of the pad backing metal can be reduced, the weight of the disc brake can be reduced accordingly. In addition, since the peripheral surfaces of the plurality of protrusions come into contact with the friction member and the adhesion area between the friction member and the pad backing metal can be increased, the adhesive strength can be increased.

[0017] On the other hand, in the pad back metal, the plurality of protrusions are formed in the same form, so that one type of dowel punch for forming the protrusions can be provided. Therefore, the cost for manufacturing a mold that does not require the production of many types of dowel punches is reduced, and it is also advantageous when repairing the mold.

[0018] In addition, in the pad back metal, the plurality of protrusions have a substantially elliptical shape, and the protrusions are arranged with the longitudinal axis of the substantially elliptical shape inclined, so that a mold such as a dowel punch The cost for manufacturing a mold without complicating the shape of the mold is reduced.

[0019] Further, since the substantially elliptical protrusions are arranged so as to be substantially orthogonal to each other in the pad back metal, even if a force for peeling the friction member is applied, the end of the substantially elliptical protrusion is The friction member is surely hooked. For this reason, even if a greater force is applied to peel off the friction member, the friction member can be made more difficult to peel off.

[0020] Furthermore, in the back metal for the node, since the plurality of protrusions are formed in different types of shapes, even if a force for peeling the friction member acts, any of the protrusions having different shapes Compared to the case where the end portion of the friction member is formed in the same shape, there is a higher possibility that the end of the friction member will be hooked with the friction member. The friction member can be made more difficult to peel off.

[0021] Further, in the pad back metal, the plurality of protrusions are formed by a progressive feed process using a fine blanking press. Therefore, the pad back metal (especially the mounting surface) ) Is prevented, burrs are not generated on the friction member mounting surface, and the friction member is in close contact with the friction member mounting surface. V, high accuracy flatness can be obtained. The member mounting surface and the friction member can be more strongly bonded with an adhesive or the like, and the bonding strength can be improved. It also looks good as a pad backing metal.

[0022] Furthermore, the invention is a method of manufacturing a pad back metal used for a disc brake pad provided with an attachment surface to which a friction member is attached, wherein the opposite surface of the attachment surface is pressed with a pressing member, A plurality of protrusions protruding toward the friction member are formed over substantially the entire area, and at least a part of the protrusions are arranged in different directions in the mounting surface, and the plurality of protrusion forces Fine blanking Due to the progressive forming by pressing, deformation is prevented, no burrs are generated on the friction member mounting surface, and the pad backing metal has a high degree of flatness on the friction member mounting surface. Can be manufactured at low cost.

[0023] Furthermore, it is a disc brake pad having a pad back metal provided with a mounting surface to which a friction member is attached, and the surface opposite to the mounting surface is pressed by a pressing member so that the mounting surface is substantially entirely covered. A plurality of protrusions projecting toward the friction member are formed, and at least some of the protrusions are Since the mounting surfaces are arranged in different directions, the ends of the protrusions arranged in different directions are arranged in the same direction even if a force to peel off the friction member is applied. Compared with the case where it is made, it becomes easy to catch a friction member and a catching force. Therefore, it is possible to obtain a disc brake pad that can be more difficult to be peeled off than in the past even if a larger force is applied to peel off the friction member.

Brief Description of Drawings

FIG. 1 is a schematic view of a disc brake using a pad back metal according to an embodiment of the present invention.

[Fig. 2] A brake pad using the back metal for a node according to the embodiment of the present invention, wherein (a) is a front view, (b) is a lower side view partially showing a cross section, c) is an enlarged sectional view showing the protrusion of (b).

FIG. 3 is a pad back metal according to an embodiment of the present invention, wherein (a) is a front view, (b) is a lower side view partially showing a cross section, and (c) is a protrusion of (b). It is sectional drawing which expands and shows.

FIG. 4 shows a brake pad using the pad backing according to the embodiment of the present invention, which is not provided with the mold hole of FIG. 2, (a) is a front view, (b) FIG. 4 is a lower side view partially showing a cross section.

FIG. 5 shows a back metal for a node according to an embodiment of the present invention, which is not provided with the mold hole of FIG. 3, (a) is a front view, and (b) is a part of it. It is the lower side view represented with the cross section.

FIG. 6 is a schematic view of a mold for manufacturing a pad back metal according to an embodiment of the present invention by progressive feed by fine blanking, wherein (a) is a front view of the manufacturing apparatus, and (b) FIG. 3 is a sectional view of (a).

FIG. 7 is a schematic diagram of a coil material when the pad back metal according to the embodiment of the present invention is manufactured by progressive feed by fine blanking, and (a) is a check that the coil material is covered for each process. The front view showing the state, (c) is a sectional view of (b).

FIG. 8 is another embodiment of the present invention, in which (a) is an enlarged perspective view of a protrusion of a pad back metal, and (b) is a cross-sectional view taken along line AA in (a). .

FIG. 9 is a brake pad according to another embodiment of the present invention, wherein (a) is a front view and (b) is a lower side view partially showing a cross section. FIG. 10 is a schematic view of a mold for manufacturing the back pad for the brake pad shown in FIG. 9 by progressive feeding using fine blanking, where (a) is a front view of the manufacturing apparatus, and (b) is ( It is sectional drawing of a).

FIG. 11 is a view of a brake according to another embodiment of the present invention, in which the protrusions of the pad are slanted, (a) is a front view, and (b) is a lower side view partially showing a cross section. It is.

Explanation of symbols

[0025] 1 disc brake

2 Brake disc

7, 70 Disc brake pad

9 Friction member

10, 100 Pad back metal

10a Friction member mounting surface

11 Monored hole

12, 120 protrusions

50 Production equipment

54 Dowel punch (Pressing member)

55 Dowels

60 Main punch

69 Guide post

T end

BEST MODE FOR CARRYING OUT THE INVENTION

[0026] Hereinafter, the back metal for the node according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a disc brake using a pad back metal according to an embodiment of the present invention.

As shown in FIG. 1, a disc brake 1 used in an automobile or the like includes a brake disc 2 that can rotate together with an axle 5 and a caliper 3 disposed at the peripheral edge of the brake disc 2.

As shown in Fig. 1, the brake disc 2 is formed in a disc shape with a hub 2c at the center. In addition, two flat portions 2a and 2b for sliding a friction member to be described later are provided on the outer peripheral edge of the disc. The hub 2c at the center of the brake disc 2 is provided with four mounting holes 4 penetrating in the plate thickness direction, and the mounting holes 4 pass through the four studs 6 protruding from the axle 5 side. Has been. As a result, the brake disc 2 rotates together with the axle 5.

As shown in FIG. 1, the caliper 3 is configured so as to sandwich the flat portions 2a and 2b of the brake disc 2 from the outside, and on the inner side (side facing the flat portions 2a and 2b), the disc brake is disposed. 'Pad 7 is attached to each. A bracket 8 for guiding the disc brake pad 7 so as to be movable in the plate thickness direction of the brake disc 2 is provided on the outside of the carrier 3.

[0028] The above-described caliper 3 is provided with a piston (not shown) that moves by hydraulic pressure or the like. This piston is designed to press the disc brake pad 7 against the brake disc 2 when the driver depresses the brake pedal, and the pressed disc brake 'pad 7 is It is guided and comes into contact with the respective flat portions 2a and 2b.

FIG. 2 (a) is a front view of the disc brake pad 7 and FIG. 2 (b) is a bottom view of the disc brake pad 7. FIG. c) is a partially enlarged view of the cross section of Fig. 2 (b). The disc brake pad 7 includes a friction member 9 and a pad back metal 10 to which the friction member 9 is attached. As shown in FIG. 2 (a), the disc brake pad 7 is formed in an arcuate shape that is curved in accordance with the outer shape of the outer peripheral edge of the brake disc 2.

[0030] As shown in Fig. 2 (b), the friction member 9 is formed in a flat plate shape having a sliding plane 9a and a mounting surface 9b which is a surface opposite to the sliding plane 9a. The moving plane 9a is slid by being pressed by the plane portion 2a or 2b of the brake disk 2.

[0031] Fig. 3 (a) is a front view of the pad backing 10 used for the disc brake pad 7, and Fig. 3 (b) is a lower side view of the pad backing 10 with a part thereof in cross section. FIG. 3 (c) is a partially enlarged view of the cross section of FIG. 3 (b).

As shown in FIGS. 2 (b) and 3 (b), the pad back metal 10 is provided on the friction member mounting surface 10a The friction member mounting surface 10a is formed in a flat plate shape having a mounting surface 10b opposite to the friction member mounting surface 10a, as shown in FIGS. 2 (a), (b) and (c). As described above, the attachment surface 9b of the friction member 9 is bonded using an adhesive or the like. On the other hand, the attachment surface 1 Ob of the pad backing 10 is attached to the carrier 3.

As shown in FIGS. 3 (a) and 3 (b), the pad back metal 10 has two mold holes 11 penetrating in the plate thickness direction, and the friction member 9 from the friction member mounting surface 10a. A plurality of projections 12 projecting inward (all symbols 12X, 12Y, and 12Z are collectively indicated by symbol 12) are formed. As shown in FIG. 2B, the friction member 9 to be molded enters the inside of the mold hole 11.

As is clear from FIG. 2 (a), the plurality of protrusions 12 are formed at appropriate intervals along the inner periphery of the periphery of the region corresponding to the friction member 9 (indicated by a broken line in the drawing). In addition, the two mold holes 11 are formed at appropriate intervals so as to surround each of the holes. That is, the plurality of protrusions 12 includes a vicinity of the peripheral edge portion of the region corresponding to the friction member 9, and includes a plurality of rows along substantially the entire friction member mounting surface 10a along the back metal longitudinal direction and the short direction. It is formed at an appropriate interval over the range.

[0034] The protrusion 12 enters (bites into) the inward of the friction member 9. More specifically, the friction member 9 is heated and molded on the friction member mounting surface 10a. When the friction member 9 is baked on the protrusion 12 of the back plate 10 for the nod, the friction member 9 acts on the protrusion 12, and the periphery. Due to the pressure applied, the protrusion 12 enters the friction member 9, and the friction member 9 and the protrusion 12 are firmly bonded. As a result, the back metal 10 for the node and the friction member 9 are engaged with each other, and the bonding effect is expanded. Further, the contact area between the pad back metal 10 and the friction member 9 is widened, and peeling can be prevented.

[0035] As shown in FIGS. 2 (a) to 2 (c), the external shape of the protrusion 12 is substantially elliptical in a plan view (when the friction member mounting surface 1 Oa is also viewed from the front force) and is the same. It is formed to have the form of More specifically, the shape of the protrusion 12 is such that both ends T in the longitudinal direction of the rectangle are formed in a semicircular shape, and when viewed from the side of the protrusion 12, it is shown in FIG. It becomes such a substantially rectangular shape. The substantially elliptical shape is a shape having a longitudinal direction that is not a circular shape, and includes all shapes that approximate an ellipse. [0036] The plurality of protrusions 12 are substantially elliptical in the direction of the longitudinal direction so that they are not directed in a certain direction (with some protrusions of the plurality of protrusions changing their directions in different directions) It is arranged. For example, as shown in FIG. 2 (a) as an example, the longitudinal direction of the substantially elliptical shape is adjacent to the protrusion 12X directed in the vertical direction of the paper, and the protrusion 12X, and compared with the protrusion 12X. The projection 12Y is arranged in a mode rotated 90 degrees (a mode that is oriented in the left-right direction on the page and is substantially orthogonal to the projection 12X). In addition, in the vicinity of the edge of the outer shape of the pad back metal 10 and the mold hole 11, the longitudinal direction of the substantially elliptical shape conforms to the shape of the part (along the longitudinal direction of the substantially elliptical shape). Protrusions 12Z are provided so as to be inclined with respect to the axis (longitudinal axis).

[0037] The longitudinal direction of the substantially elliptical shape is a force in a direction in which the edge of the friction member 9 is peeled off (a resultant force of a direction perpendicular to the friction member mounting surface 10a and a direction in which peeling is progressed). In the state where the friction member 9 is about to be peeled off from the pad back metal 10 (shown as exaggerated by the dotted line in FIG. 2 (b)) due to the action of the arrow F in FIG. Both end portions 長手 in the longitudinal direction of 12X, 12Y, and 12Z are arranged in such a direction as to catch the friction member 9. Note that the case where a force for peeling off the edge of the friction member 9 is generated, for example, because the friction member 9 is partially worn, so that the flat portions 2a and 2b of the brake disk 2 and the edge of the friction member 9 are applied during braking. When the edge of the friction member 9 is lifted up or when the flat portions 2a and 2b of the brake disc 2 and the friction member 9 come into contact with each other, the brake disc 2 In some cases, the flat portions 2a and 2b and the edge of the friction member 9 are not in contact with each other, and the edge of the friction member 9 is lifted.

[0038] Describing in detail with reference to Fig. 2 (a), for example, the left end portion of the friction member 9 is positioned on the right side (Fig. 2

When peeled by force in the direction of arrow Q in (a), the end T of the protrusion 12Y whose longitudinal direction is oriented in the left-right direction (the same direction as the direction to be peeled) in FIG. Also, there is no catching force with the friction member (it is difficult to catch). The projection 12X (protrusion with the longitudinal direction oriented in the vertical direction) rotated 90 degrees in the longitudinal direction is provided, so that both ends T of this projection are caught by the friction member 9 and the right side Against the force that tries to peel it off. In addition, both ends T of the protrusion 12Z are also at an angle of 90 degrees or less with the direction of the arrow Q, but counteract the force to be caught and peeled off. On the other hand, when the lower end portion of the friction member 9 is peeled upward (in the direction of arrow R in FIG. 2 (a)), the longitudinal direction is directed in the left-right direction in FIG. 2 (a). The both ends T of the projection 12Y and the both ends 突起 of the projection Ζ are caught by the friction member 9 and counteract the force to be peeled upward.

[0040] On the other hand, when the left lower end portion of the friction member 9 is peeled toward the upper right side (in the direction of arrow R in FIG. 2 (a)), both end portions T of the respective protrusions 12X and 12Y become the friction member. 9 and 9 are respectively caught, and both end portions T face the force to be peeled diagonally upward to the right. In this case, when the force force to be peeled is in the direction of the arrow R, all the projections 12X and 12Y are hooked, which is effective in generating opposing forces.

As described above, when the friction member 9 is to be peeled in any direction, the end portions Τ of any of the protrusions 12X, 12Y, and 12Z come to be hooked with the friction member 9.

[0041] The corners of the protrusions 12 may be chamfered or rounded or may be intentionally angled. Further, the protrusion 12 may be tapered so as to gradually taper toward the tip in the protruding direction of the protrusion 12. As will be described in detail later, the protrusion 12 is formed by a pin (pressing member, dowel punch) that is driven toward the side force plate thickness direction of the mounting surface 10b, and this pin is driven into the mounting surface 10b. There is a groove 13 formed by The volume of the recessed portion of the groove 13 and the volume of the protruding portion of the protrusion 12 are formed to be substantially the same volume. As for the dimensions of the protrusion 12, the force depends on the size and thickness of the pad backing 10. The protrusion length of the protrusion 12 is 1.5 mn! It is preferably about 5 mm.

On the other hand, as shown in FIGS. 4 and 5, the nod back metal can be used for a disk brake pad without providing the mold hole 11. 4 (a) is a front view of the disc brake pad 7 without a mold hole, and FIG. 4 (b) is a bottom view of the disc brake pad 7. FIG. Fig. 5 (a) is a front view of the pad backing 10 used for the disc brake node 7, and Fig. 5 (b) is a lower side view of the pad backing 10 with a part thereof in cross section. FIG.

[0043] In this case, the plurality of protrusions 12 correspond to the friction member 9 as is apparent from Fig. 4 (a). The peripheral edge of the region (indicated by a broken line in the figure) is formed with an appropriate distance along the inner side of the vicinity, and substantially along the entire area of the friction member mounting surface 10a along the back metal longitudinal direction and the short direction. Each of the plurality of rows is formed at an appropriate interval.

[0044] By providing the plurality of substantially elliptical protrusions 12 on the friction material mounting surface 1 Oa of the pad back metal 10 in this way, the rigidity of the entire nod back metal 10 is improved. Further, since the mold hole 11 is not provided, the problem of wrinkles generated in the cross section of the mold hole 11 is also eliminated.

Next, a manufacturing apparatus and a manufacturing method for manufacturing the pad back metal 10 will be described. Fig. 6 (a) is a front view of the manufacturing equipment (die) used for progressive feeding by the fine blanking press, and Fig. 6 (b) is a cross-sectional view of (a). Figs. 7 (a) and 7 (b) are schematic diagrams showing the manufacturing process in progressive feeding with a fine blanking press.

[0046] The mold hole 11 and the protrusion 12 formed in the back metal 10 for the knot are formed by progressive feeding using a fine blanking press.

Here, the progressive feeding by the fine blanking press will be briefly described. This processing method allows parts to be finished at once by punching a workpiece with high accuracy. According to the progressive feed processing by this fine blanking press, the outer frame required for parts by normal press processing is used. It is possible to eliminate secondary calories such as cutting and milling of holes.

More specifically, in a normal press carriage, punching is performed by a combination of a punch and a die. When the punch is lowered and contacts the material on the die and pressed, the material undergoes bending and deforms. Then, a fracture occurs through a shearing process, and punching is completed before the punch passes through the material. Therefore, “sagging burr is large”, “severe shear surface with many fracture surfaces! /,”, “Cut surface is not perpendicular to material surface”, “extracted, flat surface of product” In other cases, secondary processing is required. On the other hand, the progressive feed process using a fine blanking press is a method of punching by controlling the material flow in the sheared part of the material to be punched, and using a punch and die with extremely small clearance, High compressive stress is generated on the surface, the ductility of the material is increased to prevent the occurrence of cracks, and a vertical, beautiful and sheared surface can be obtained without breaking. [0047] As shown in FIGS. 6 (a) and 6 (b), a manufacturing apparatus 50 for progressive processing by a fine blanking press includes an upper mold 51 and a lower mold 52. The coil material 53 is sequentially fed to the mold 52 in the direction of the arrow X to the right side of the left side of FIG. 6 (a). The upper die 51 is fixed and the lower die 52 is movable in the vertical direction. Further, the upper side surface 53a of the coil material 53 serves as the friction member mounting surface 10a of the pad back metal 10.

[0048] As shown in Fig. 6 (b), the manufacturing apparatus 50 mainly includes the following components.

(1) Parts that form protrusion 12

A dowel punch 54 (pin) provided on the lower mold 52 side for extruding the coil material 53. • A dowel holder 55 provided on the upper mold 51 side for receiving the dowel punch 54.

(2) Parts for forming the mold hole 11

'Pierce punch 57 for punching the coil material 53 provided on the upper mold 51 side. • An ejector punch 58 is provided on the lower mold 52 side to push out the scrap after punching from the coil material 53.

• Pierce pressure pin 59 provided on the lower mold 52 side to apply pressure to push out the scrap after punching.

[0050] (3) Parts for positioning the coil material 53

• Pilot member 56 provided on the lower mold 52 side to guide the feeding direction of the coil material 53 with the punched mold hole 11 and crush the burrs in the mold hole 11.

[0051] (4) Parts forming the outer shape of the back metal 10 for pads

• A main punch 60 which is provided on the upper mold 51 side and punches the outer shape of the back metal 10 for the node.

• Reverse pressing member 61 provided on the lower mold 52 side to push out the punched pad backing 10. • Counter pressure pin 62 on the lower mold 52 side to apply pressure to push out the punched pad backing 10.

[0052] (5) Other components

• An inlet guide member 63 and an outlet guide member 64 for guiding the coil material 53.

'Upper punch plate 65 for positioning each punch on the upper mold 51 side.

'Stripper plate 66 for removing the punched parts from the mold. 'Die plate for product processing 67.

'The lower punch plate 68, which is the stop plate for the ejector punch.

• Guide post 69 to guide the movement of the lower mold 52.

[0053] As shown in Fig. 7 (a) and Fig. 7 (b), the nod back metal 10 is completed by a total of three steps A, B, and C.

In the first step A, the lower die 52 moves upward, the projection 12 is formed by the dowel punch 54 (pin) and the dowel receiver 55, and the mold hole 11 is punched by the piercing punch 57. The above-described dowel punch 54 and dowel receiver 55 have a substantially elliptical shape that matches the shape of the protrusion 12. In this step, the force is applied in a state where the upper surface 53a (friction member mounting surface 10a) of the coil material is constrained by the upper die 51. As a result, the upper side surface 53a is free from grooving or the like due to processing of the flat surface, and high-precision flatness can be obtained.

In the second step B, after the coil material 53 is fed for one step, a positioning pilot member 56 is inserted into the mold hole 11 to determine the position of the coil material 53. This is for accurately determining the position of the coil material 53 fed forward. If the mold hole 11 is not provided in the pad backing 10, a hole (not shown) is provided outside the planned punching portion of the node backing 10 in the coil 53 for positioning the coil 53. Provided, another pilot member (not shown) to be inserted into this hole is provided on the lower mold 52 side, and this another pie mouth member is inserted into the hole to position the coil material 53. Oh ,.

[0055] In the third step, after the coil material 53 is further fed for one step, the position of the coil material 53 is determined by the pie-tut member 56 in the second step, and then the main punch 60 and the die plate 67 are positioned. The reverse pressing member 61 punches the outer shape of the pad back metal 10 from the coil material 53.

[0056] According to the knives / do backing 10 according to the embodiment of the present invention, the longitudinal force of at least some of the protrusions 12 are arranged in different directions in the friction member mounting surface 10a. Therefore, even if a force for peeling the friction member 9 is applied, the end portions T of the protrusions 12 arranged in different directions are caught with the friction member 9 as compared with the case where the ends T are arranged in the same direction. It becomes easier. Therefore, even if a large force acts to peel off the friction member 9, It can be made difficult to peel off as compared with the prior art.

Further, according to the present embodiment, the mounting surface 10b is pressed by the pressing member, and the plurality of protrusions 12 protruding toward the friction member 9 are formed over substantially the entire friction member mounting surface 10a. The section modulus of the pad back metal 10 in the plate thickness direction can be increased substantially on average throughout the back metal. Therefore, the strength of the pad back metal 10 increases substantially on the whole back metal, and can counteract the large shear stress that does not increase the thickness of the pad back metal 10, so the thickness is increased to increase the strength. The material cost of the pad back metal 10 can be greatly reduced by about 30% or more compared to the conventional type, and the weight of the disc back pad 10 can be reduced and the thickness of the disc back metal 10 can be reduced. Light weight can be achieved.

Further, since the amount of the friction member 9 used can be reduced by the volume of the plurality of protrusions 12, the cost of the friction member 9 can be reduced.

Further, since the plurality of protrusions 12 are formed so as to include the vicinity of the periphery of the region corresponding to the friction member 9, the protrusion 12 enters the inside of the friction member 9 until reaching the periphery of the friction member 9. Thus, a firm engagement with the friction member 9 is realized, a braking force for separating the friction member 9 can be counteracted, and a structure with excellent durability can be provided.

Further, the peripheral surfaces and top surfaces of the plurality of protrusions 12 come into contact with the friction member 9, and the bonding area between the friction member 9 and the pad back metal 10 can be increased, so that the adhesive strength can be increased. Furthermore, even when corrosion such as soot occurs due to the intrusion of rainwater, the adhesive strength can be maintained as high as possible.

[0058] Further, since the plurality of protrusions have a substantially elliptical shape, and the protrusions are arranged with the longitudinal axis of the substantially elliptical shape inclined, the protrusions are formed in accordance with the shape or the like of the pad backing metal 10. 12 can be arranged freely. In particular, if the substantially elliptical protrusions 12 are arranged so as to be substantially orthogonal, even if a force to peel off the friction member 9 acts, the end T of the substantially elliptical protrusion 12 is reliably pulled with the friction member. It comes to be applied.

[0059] Furthermore, according to the present embodiment, the plurality of protrusions 12 are formed by plastic deformation while constraining the plane of the friction member mounting surface 10a by progressive feeding using a fine blanking press. In addition, the flatness of the flat surface before processing that does not cause the friction member mounting surface 10a to be curved, uneven, or slashed by the processing for providing the projections 12 is reduced. Can be maintained.

Although the best mode for carrying out the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and changes can be made.

For example, as shown in FIGS. 8 (a) and 8 (b), the top of the protrusion 12 is pressed to form a recess 12a, and the protrusion protrudes in the width direction of the protrusion 12 by the volume of the recess 12a. 12b may be formed. In FIG. 8 (a), the pressing range may be formed by pressing either one or both ends of the 1S shown so as to press a part of the central portion, or the entire protruding portion 12b. The recesses 12a and the protrusions 12b may be formed by being combined with a part of the progressive feed process of the fine blanking press and formed at a time by another pressing jig. By forming the recess 12a and the protrusion 12b, even if a force that peels the friction member 9 from the pad back metal acts on the disc brake pad, the protrusion 12b and the friction member 9 are It becomes possible to counter the force of catching and peeling off. In addition, since the contact area between the protrusion 12 and the friction member 9 is further increased, the adhesive strength can be improved, and the peeling and peeling force can be countered.

[0061] In the present embodiment, the projections 12 are each substantially elliptical in a plan view. However, the present invention is not limited to this, and other shapes having a longitudinal direction, for example, a polygonal shape such as a triangle, for example, It may be a polygon such as a triangle, a rectangle, a trapezoid, a gourd or a star. In this case, for example, the longitudinal direction of a polygon, a star, etc. means the portion that hits the longest part of a straight line connecting two corners, and the gourd-shaped longitudinal direction means two straight parts connected to each other. The longest part shall be

[0062] In addition, a combination of two or more of these shapes and substantially elliptical shapes

It is also possible to use (projections formed in different types of forms). For example, like the pad back metal 100 of the disc brake pad 70 shown in FIGS. 9 (a) and 9 (b), the two protrusions 120 at the substantially central portion can be triangular. Further, the shape is not limited to the substantially central portion, and a substantially elliptical shape and a triangular shape may be equally scattered with different directions. Even in this structure, even if the force acts on any of the arrow P, the arrow Q, and the arrow R in the direction in which the edge of the friction member 9 is peeled off, the end T of one of the protrusions 120 is the friction member. 9 will be hooked. Even in the case of such irregular projections such as triangles, as shown in FIGS. 10 (a) and 10 (b), they can be produced by progressive feeding with a fine blanking press.

[0063] Further, as shown in FIGS. 11 (a) and 11 (b), the substantially elliptical protrusions are inclined obliquely, and the adjacent protrusions are Katakana's C-shaped (center line extending in the vertical direction (Fig. (2) The slanted protrusions 12Z are arranged so as to be symmetrical with respect to each other, and the two protrusions 12Z are arranged as a pair. Can also be included). In FIG. 11 (a), the C-shape is continuously arranged in the left-right direction at the center of the pad back metal 10. As a result, when a force to peel off is applied to the upper side (arrow R direction) or the right side (arrow Q direction) of FIG. I can catch the force that both ends T try to peel off. In this case, when the force to be peeled is in the direction of the arrow Q or the arrow R, all the projections 12Z are hooked, which is particularly effective for generating the opposing force. That is, it is useful to appropriately select the longitudinal direction and arrangement of the protrusions 12X, 12Y, and 12Z depending on which directional force mainly acts to peel the friction member 9.

Thus, even when the substantially elliptical shape is arranged in a square shape, it can be manufactured by progressive feeding using a fine blanking press.

[0064] Further, the means for pressing with the pressing member is not limited to the progressive feed processing by the fine blanking press, and may be general press molding such as cold press and hot press. Further, the protrusion 12 may be formed by a forging press carriage or the like.

Claims

The scope of the claims

[1] A pad backing for a disc brake pad with a mounting surface for attaching a friction member,

Pressing the opposite surface of the mounting surface with a pressing member, forming a plurality of protrusions protruding toward the friction member over the entire mounting surface,

At least a part of the projection force The back metal for pads, wherein the pads are arranged in different directions in the mounting surface.

2. The pad back metal according to claim 1, wherein the plurality of protrusions are formed in the same form.

[3] The shape of the plurality of protrusions is substantially elliptical,

3. The pad back metal according to claim 1, wherein the protrusions are arranged with a substantially elliptical longitudinal axis inclined.

4. The pad back metal according to claim 3, wherein the substantially elliptical protrusions are arranged so as to be substantially orthogonal to each other.

5. The pad back metal according to claim 1, wherein the plurality of protrusions are formed in different types of forms.

[6] The metal backing / metal backing plate according to any one of claims 1 to 5, wherein the plurality of protrusions are formed by progressive feeding using a fine blanking press.

[7] A method of manufacturing a pad back metal used for a disc brake pad having a mounting surface for attaching a friction member,

The surface opposite to the mounting surface is pressed with a pressing member to form a plurality of protrusions protruding toward the friction member over substantially the entire mounting surface, and at least some of the protrusions are in different directions within the mounting surface. It is arranged in a different direction,

A method for producing a back metal for a pad, characterized by being formed by progressive feeding with a fine blanking press.

[8] A disc brake pad having a pad backing with a mounting surface for attaching a friction member,

The surface opposite to the mounting surface is pressed by a pressing member, and the friction member extends over substantially the entire mounting surface. Forming a plurality of protrusions protruding to the side,

At least a part of the projecting force The disc brake pad characterized by being arranged in a different direction within the mounting surface.

7. The disc brake pad according to claim 6, wherein the plurality of protrusions are formed by progressive processing using a fine blanking press.