JP4527010B2 - Brake shoe manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a brake shoe used for braking automobiles, various industrial machines and the like.

For example, brake shoes are used for braking automobiles and various industrial machines.
As shown in Patent Document 1, the conventional brake shoe has a groove in the outer circumferential portion of a metal blank on a circular plate having a groove width larger than the thickness of the blank on the outer circumferential surface in the circumferential direction. And pressing the concave groove and the groove forming blade portion of a pre-rolling roller die formed by projecting a groove forming blade portion in the circumferential direction on the inner bottom portion of the concave groove, A pre-molding step in which an outer peripheral groove is provided by the groove forming blade portion on the entire outer periphery, and an expansion molding formed by projecting an expanding blade portion on the outer peripheral surface of the blank in the circumferential direction of the blank. Of the roller die for expansion, expanding the outer peripheral portion of the blank while dividing the outer peripheral portion of the blank into two in the plate thickness direction, and forming a rim on the outer periphery of the web and the web Partial circle by cutting the process and the web and rim into the required shape And Jo of the shoe rim, the brake shoe and a step of forming a brake shoe having a Shuribu which projects from the inner periphery of the shoe rim is known.

Japanese Patent No. 3330363

  However, when manufacturing a brake shoe by the method shown above, a blank (friction member support) is produced by punching out the material (metal plate) to be used, which ultimately depends on the size of the brake shoe. About 70% of the material is discarded, which is uneconomical and the resulting brake shoe is expensive.

  The present invention provides an economical and inexpensive method for manufacturing a brake shoe with the least amount of material to be disposed of.

In the present invention, a long metal plate having a dimension capable of obtaining a plurality of brake shoes is bent into a V shape in the longitudinal direction at a substantially central portion of the width, and then both left and right side surfaces of the V shape metal plate A part between the upper part and the lower part is folded outward in the length direction, and then pressed by applying pressure from the outside to the inside of the V-shaped part, and processed into a T-shape having a flat part and a protruding part perpendicular thereto. In addition, after processing into a continuous spiral shape so that the protruding portion is on the inside, it is cut at a portion where a ring-shaped brake shoe of a required size can be formed, and a plurality of misaligned left and right cut surfaces Divided ring-shaped metal processed products are obtained, and then each divided ring-shaped metal processed product is processed into a ring shape in which the upper and lower surfaces are parallel by correcting the left and right deviations of the individual cut surfaces, thereby obtaining ring-shaped metal processed products. And then ring metal Method of manufacturing a brake shoe, characterized in that either or integrally molded securing the friction member to the flat portion of the Shinasotogawa surface related.

In addition, the present invention provides the method for manufacturing the brake shoe, wherein the ring-shaped metal workpiece is provided with a notch in a part in a circumferential direction.
Furthermore, this invention relates to the manufacturing method of the said brake shoe formed by welding a part of protrusion part of a ring-shaped metal workpiece in the circumferential direction perimeter or partially.

  The brake shoe manufactured by the method of the present invention is an economical and inexpensive brake shoe because it can reduce the material (metal plate) to be disposed of as much as possible, and is extremely suitable industrially.

The brake shoe manufactured by the method of the present invention can be manufactured by using a strip-shaped (rectangular) metal plate having a dimension that allows a single brake shoe to be manufactured one by one. In addition, a large number of ring-shaped brake shoes, that is, a single brake shoe may be manufactured from a single metal plate by using a long metal plate having a dimension capable of obtaining a plurality of brake shoes.
In the present invention, when a strip-shaped metal plate is used, if a metal plate having the same length as a single ring-shaped brake shoe is used in advance, it is not necessary to adjust to a specified size later. Therefore, it is preferable.

  On the other hand, in the case of using a long metal plate, the long metal plate is bent into a V shape in the longitudinal direction at the center of the width, and then the upper part of the left and right side surfaces of the V shape metal plate. A part between the lower part and the lower part is folded back to the outside in the length direction, and then pressed by applying pressure from the outside to the inside of the V-shaped part, and processed into a T-shape having a flat part and a protruding part perpendicular thereto. A plurality of ring-shaped brake shoes are manufactured using a part that can be formed into a ring-shaped brake shoe of a required size, or a T-shape having a flat part and a protruding part perpendicular thereto. After processing, after processing into a continuous spiral shape so that the protruding part is inside, cut at the part where a ring-shaped brake shoe of the required size can be formed, and the left and right cut surfaces will be displaced Some split ring-shaped gold Obtain a processed product, and then correct the left and right misalignment of each cut surface for each split ring-shaped metal processed product and process it into a ring shape with upper and lower surfaces parallel to produce multiple ring-shaped brake shoes Can do.

  The material of the strip-shaped or long metal plate used in the present invention is not particularly limited as long as it is a ductile metal plate, and for example, a steel plate, an aluminum plate, a brass plate, etc. are preferable. It is particularly preferable to use an aluminum plate.

  In the present invention, a strip-shaped or long metal plate is bent into a V shape in the longitudinal direction at the center of its width, and then a portion between the upper and lower sides of the left and right side surfaces of the V-shaped metal plate is formed. Although it folds outward in the length direction, there is no particular limitation on the processing method for forming the shape as described above. For example, it is rolled using a V-shaped roller die or bent using a press. It can be processed by a method such as processing. In addition, the part which folds the left and right side surfaces of the V-shaped metal plate outward in the length direction is not particularly limited as long as it is between the upper part and the lower part.

Next, pressure is applied from the outside to the inside of the V-shaped part, and it is processed into a T-shape having a flat part and a protruding part perpendicular to the flat part. However, this processing method is not particularly limited and is the same as described above. It is preferable to work by a method such as rolling or pressing.
The flat portion processed into a T-shape corresponds to the shoe rim of the obtained brake shoe, and the protruding portion perpendicular to the flat portion corresponds to the shoe web of the brake shoe.
After processing into a T-shape, processing is performed in a ring shape so that the protruding portion is on the inside, but roll processing is optimal for this processing method, but it is not necessarily limited to this method.

  In the present invention, when a long metal plate is used, after processing into a T shape, it is cut at a portion where a ring-shaped brake shoe of a required size can be formed or processed into a T shape. Then, after processing into a continuous spiral shape so that the protruding portion is inside, the brake shoe is manufactured by cutting at a portion where a ring-shaped brake shoe of a required size can be formed. In addition, there is no restriction | limiting in particular about the length of the elongate metal plate to be used, It is preferable that it is the length which can produce about 2-5 single ring-shaped brake shoes. Further, the means for processing into a spiral shape is not particularly limited, and it is preferable to perform the processing by a method such as roll processing or press processing as described above.

  In the present invention, in order to increase the strength and rigidity of the brake shoe, it is necessary to prevent the upper portion of the protruding portion of the metal plate processed into a ring shape from expanding, or after being pressed into a T-shape or the ring. Then, the upper part of the protruding part (inside the flat part of the ring-shaped metal plate) is welded in the circumferential direction by seamless welding, spot welding or the like, or only the necessary part is welded partially. It is preferable. Further, in addition to the above welding, it is possible to fix by a caulking method.

As the material of the friction member fixed to the flat part of the ring-shaped metal plate obtained as described above, generally known materials are used. For example, steel fiber, brass fiber, copper fiber, aramid fiber, acrylic fiber, phenol Fibrous materials such as fibers, ceramic fibers, rock wool, potassium titanate fibers, carbon fibers, thermosetting resins such as phenol resins, epoxy resins, melamine resins, cashew resins, and rubber components such as NBR and SBR Organic friction modifiers such as friction dust, inorganic friction modifiers such as barium sulfate, graphite, and antimony trisulfide are used.
In addition to the above materials, metal powder such as brass and copper is added as necessary.
Note that the blending ratio of the material of the friction member varies depending on the friction characteristics and is appropriately determined, and is not particularly limited.

  The friction member is attached to the flat portion of the outer surface of the ring-shaped metal workpiece by an adhering method or integral molding. Of these, the adhering method can be fixed by riveting, an adhesive, or the like. In the case of bonding, in order to increase the bonding strength of the friction member, it is preferable that the outer periphery of the ring-shaped metal workpiece is processed such as knurling before bonding the friction member.

Embodiments of the present invention will be described below with reference to the drawings.
FIGS. 1 to 7 are views showing a manufacturing process of a ring-shaped brake shoe according to an embodiment of the present invention. Of these, FIG. Fig. 2 is a perspective view of a V-shaped steel plate formed by bending a substantially central portion of the width into a V shape in the length direction. Fig. 3 is a view showing the upper half of the left and right sides of the V-shaped steel plate. 4 is a perspective view of a substantially V-shaped steel plate folded outward in the vertical direction, FIG. 4 is a perspective view of a T-shaped steel plate formed with a flat portion and a protruding portion perpendicular thereto, and FIG. 5 is a T-shape shown in FIG. FIG. 6 is a perspective view of a ring-shaped steel plate in which both ends of the protruding portion are processed with dimensional accuracy, and FIG. 7 is a ring-shaped steel plate. The present invention in which a friction member is bonded to the flat portion of the outer surface It is a perspective view of the ring-shaped brake shoe made.

  8 is a perspective view of a ring-shaped steel plate showing a state where seamless welding is performed on the entire upper part (inside the flat portion of the ring-shaped steel plate) of the protruding portion of the ring-shaped steel plate shown in FIG. 5, and FIG. FIG. 6 is a perspective view of a ring-shaped steel plate showing a state in which spot welding is partially applied to an upper portion (inside a flat portion of the ring-shaped steel plate) of the ring-shaped steel plate shown in FIG.

  FIGS. 10 to 13 are views showing a manufacturing process of a ring-shaped brake shoe according to another embodiment of the present invention, in which FIG. 10 is continuous so that the protruding portion of the T-shaped steel plate is inside. FIG. 11 is a plan view of a single ring-shaped steel plate obtained by cutting the spiral steel plate shown in FIG. 10, FIG. 12 is a front view of FIG. 11, and FIG. It is a front view which shows the state which correct | amended the misalignment of the right and left of each cut surface of the ring-shaped steel plate shown in FIG.

Example 1
As shown in FIG. 1, a strip-shaped steel plate 1 having dimensions of 900 mm in length (length), 63 mm in width (width) and 3 mm in thickness is prepared, and an inverted V-shaped roller die is used as shown in FIG. The V-shaped steel plate 2 is produced by bending a substantially central portion of the width of the steel plate 1 into a V-shape in the length direction, and, as shown in FIG. The upper part is folded back in the length direction from the center part of both side surfaces, and then the V-shaped part remaining in the press is pressure-contacted by applying pressure from the outside to the inside, and the longitudinal (length) 900 mm as shown in FIG. A T-shaped steel plate 5 processed into a T-shape having a flat portion 3 having a width (width) of 45 mm and a protruding portion 4 having a height of 9 mm was produced.

  Next, as shown in FIG. 5, a ring-shaped steel having a notch in a part in the circumferential direction by rolling so that the protruding portion 4 of the T-shaped steel plate 5 obtained in FIG. After producing the plate 6, as shown in FIG. 6, the end portions 7 and 8 of the protruding portion are processed to a predetermined dimensional accuracy, and further, the outer peripheral portion of the flat portion 3 is knurled and then shown in FIG. 7. In this way, a ring is formed by adhering a friction member 9 obtained by mixing and forming a fibrous material, a binder, an organic friction modifier, an inorganic friction modifier and the like to the flat portion 3 on the outer surface of the ring-shaped steel plate 6. A brake shoe was obtained.

Example 2
As shown in FIG. 8, except that seamless welding 10 is applied to the entire upper part of the protruding portion 4 of the ring-shaped steel plate 6 shown in FIG. 5 (inside the flat portion of the ring-shaped steel plate). A ring-shaped brake shoe was obtained through the same steps as in Example 1.

Example 3
As shown in FIG. 9, except that spot welding 11 is partially applied to the upper part (inside the flat part of the ring-shaped steel plate) of the protruding portion 4 of the T-shaped processed product of the ring-shaped steel plate 6 shown in FIG. 5. Obtained a ring-shaped brake shoe through the same steps as in Example 1.

Example 4
A long steel plate (not shown) having dimensions of 2700 mm in length (length), 63 mm in width (width) and 3 mm in thickness is prepared, and a V-shaped steel plate is manufactured through the same steps as in Example 1 below. Further, the upper half of the left and right side surfaces of the V-shaped steel plate were folded back outward in the length direction, and the V-shaped portion remaining in the press was pressed from the outside to the inside to press-contact. A T-shaped steel plate processed into a T-shape having a flat portion and a protruding portion having the same dimensions as those in FIG.
Thereafter, the T-shaped steel plate was cut into a length of 900 mm so as to be divided into three equal parts, and three divided T-shaped steel plates having the same dimensions as in Example 1 were produced.

Next, each ring-shaped steel plate is rolled so that the protruding portion is on the inside, and a ring shape having the same dimensions as in Example 1 having a notch in the circumferential direction as in Example 1. A steel plate was produced.
Thereafter, a friction member was bonded to the flat portion of the outer surface of the ring-shaped steel plate through the same steps as in Example 1 to obtain a ring-shaped brake shoe.

Example 5
A long steel plate (not shown) having dimensions of 2700 mm in length (length), 63 mm in width (width) and 3 mm in thickness is prepared, and a V-shaped steel plate is manufactured through the same steps as in Example 1 below. Further, the upper half of the left and right side surfaces of the V-shaped steel plate were folded back outward in the length direction, and the V-shaped portion remaining in the press was pressed from the outside to the inside to press-contact. A T-shaped steel plate processed into a T-shape having a flat portion and a protruding portion having the same dimensions as those in FIG.
Thereafter, a continuous spiral steel plate 12 shown in FIG. 10 was produced by rolling the T-shaped steel plate obtained above.

Next, the spiral steel plate 12 is cut into three equal parts with respect to the length direction (part where three ring-shaped brake shoes shown in the first embodiment can be formed) and shown in FIGS. Three split ring-shaped steel plates 14 having such a notch 13 and having deviations in the left and right cut portions (the upper and lower surfaces are not parallel) were produced. Next, the right and left misalignments of the individual cut surfaces of the split ring-shaped steel plate 14 are corrected, and as shown in FIG. 13, the upper and lower surfaces having no misalignment are parallel to the left and right cut surfaces. A single ring-shaped steel plate 15 was produced.
Thereafter, a friction member was adhered to the flat portion on the outer surface of the ring-shaped steel plate 15 through the same steps as in Example 1 to obtain a ring-shaped brake shoe.

It is a perspective view of the strip-shaped steel board which has the dimension from which a single brake shoe is obtained. It is a perspective view of the V-shaped steel plate formed by bending the substantially central part of the width into a V shape in the length direction. It is a perspective view of the substantially V-shaped steel plate which turned up the upper half part of the right-and-left both sides | surfaces of a V-shaped steel plate outside in the length direction. It is a perspective view of the T-shaped steel plate which formed the flat part and the protrusion part perpendicular | vertical to it. It is a perspective view of the ring-shaped steel plate which processed the protrusion part of the T-shaped steel plate shown in FIG. 4 so that it might become inside. It is a perspective view of the ring-shaped steel plate which processed the both ends of the protrusion part with the dimensional accuracy. FIG. 4 is a perspective view of a ring-shaped brake shoe according to the present invention in which a friction member is bonded to a flat portion on the outer surface of the ring-shaped steel plate.

It is a perspective view of the ring-shaped steel board which shows the state which performed seamless welding to the upper perimeter of the protrusion part of the ring-shaped steel board shown in FIG. It is a perspective view of the ring-shaped steel plate which shows the state which performed the spot welding partially on the upper part of the protrusion part of the ring-shaped steel plate shown in FIG. It is a top view of the spiral steel plate processed continuously so that the protrusion part of a T-shaped steel plate may become inside. It is a top view of the single ring-shaped steel board which cut | disconnected the spiral steel board shown in FIG. It is a front view of FIG. It is a front view which shows the state which correct | amended the misalignment of the left and right of each cut surface of the single ring-shaped steel plate shown in FIG.11 and FIG.12.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel plate 2 V-shaped steel plate 3 Flat part 4 Protruding part 5 T-shaped steel plate 6 Ring-shaped steel plate 7 End part of projecting part 8 End part of projecting part 9 Friction member 10 Seamless welding 11 Spot welding 12 Spiral shape Steel plate 13 Notch 14 Split ring steel plate 15 Single ring steel plate 16 Misalignment

Claims (3)

A long metal plate having a dimension capable of obtaining a plurality of brake shoes is bent into a V shape in the longitudinal direction at the center of the width, and then the upper and lower sides of the left and right side surfaces of the V shape metal plate A portion between the two is folded back to the outside in the length direction, and then pressed by applying pressure from the outside to the inside of the V-shaped portion, and processed into a T-shape having a flat portion and a protruding portion perpendicular to the flat portion. After processing into a continuous spiral shape so that the part is on the inside, it is cut at the part where a ring-shaped brake shoe of the required size can be formed, and multiple divided ring-shaped metals with left and right cut surfaces displaced Obtain a processed product, and then correct the left and right misalignment of each cut surface for each split ring-shaped metal processed product to process it into a ring shape with parallel upper and lower surfaces to obtain a ring-shaped metal processed product, then a ring shape Metal processed product outside table Method of manufacturing a brake shoe, characterized in that either or integrally molded securing the friction member to the flat portion of the. The method for manufacturing a brake shoe according to claim 1, wherein the ring-shaped metal workpiece is provided with a notch in a part in a circumferential direction . A part of the protruding part of the ring-shaped metal workpiece is welded in the circumferential direction all around or partially.
A method for manufacturing a brake shoe according to claim 1 or 2 .

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