JP2007002867A - Method of manufacturing circular arc-shaped brake shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical and inexpensive brake shoe by minimizing the amount of materials to be disposed of. <P>SOLUTION: In this method of manufacturing the circular arc-shaped brake shoe, a metal sheet of rectangular shape A having a dimension providing a single circular arc-shaped brake shoe is longitudinally bent in a V-shape at its approximately center part in the lateral direction, and a part of the V-shaped metal sheet between both the right and left side-face upper and lower parts thereof is longitudinally folded back to the outside and pressed, by applying a pressure to a V-shaped portion from the outside to the inside to form it in a T-shape having a flat part and a projected part vertical to the flat part. The metal sheet is further processed in a circular arc shape so that the projected portion is positioned on the inside to provide a circular arc-shaped metal processed product. Next, a friction member is secured to or formed integrally with the flat part on the outer surface of the circular arc-shaped metal processed product. A metal sheet of rectangular shape B having a dimension providing the single circular arc-shaped brake shoe and a long metal sheet having a dimension providing a plurality of circular arc-shaped brake shoes are used for manufacturing the circular arc-shaped brake shoes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

For example, brake shoes are used for braking automobiles, various industrial machines, and the like.
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 of manufacturing an arc-shaped brake shoe with as few materials as possible disposed of.

  In the present invention, a strip-shaped A metal plate having a dimension that can provide a single arc-shaped processed product is bent into a V-shape in the length direction at a substantially central portion of the width, and then the V-shaped metal plate. A T-shaped portion having a flat portion and a protruding portion perpendicular to the flat portion and a portion perpendicular to the V-shaped portion. Processed into a shape, and further processed into an arc shape so that the protruding portion is on the inside to obtain an arc-shaped metal processed product, and then a friction member is fixed to the flat portion of the outer surface of the arc-shaped metal processed product or integrally molded The present invention relates to a method for manufacturing an arc-shaped brake shoe.

  In addition, the present invention provides a strip-shaped B metal plate having a dimension capable of obtaining a single ring-shaped metal workpiece, after bending the substantially central portion of the width into a V shape in the length direction, The part between the upper part and the lower part of the left and right side surfaces of the metal plate is folded outward in the length direction, and then pressed by applying pressure from the outside to the inside of the V-shaped part, so that the flat part and the protruding part perpendicular to it are formed. After processing into a ring shape so that the projecting part is inside, the part is cut at a part where an arc brake shoe of the required size can be formed, and several divided arc metal The present invention relates to a method of manufacturing an arc brake shoe, characterized in that a workpiece is obtained, and then a friction member is fixed or integrally formed on a flat portion of the outer surface of each arc-shaped metal workpiece.

  In addition, the present invention provides a long metal plate having a dimension capable of obtaining a plurality of arc-shaped brake shoes, after bending a substantially central portion of the width thereof into a V shape in the length direction, A T-shaped portion having a flat portion and a protruding portion perpendicular to the flat portion and a portion perpendicular to the V-shaped portion. A plurality of divided T-shaped metal workpieces are obtained by cutting into portions that can be formed into arc-shaped brake shoes of a required size to obtain a plurality of divided T-shaped metal workpieces. An arc-shaped metal workpiece is obtained by processing into an arc shape so that the protruding portion is on the inside, and then a friction member is fixed or integrally formed on a flat portion of the outer surface of the arc-shaped metal workpiece. Manufacture of arc brake shoes Law on.

In addition, the present invention provides a long metal plate having a dimension that allows a plurality of arc-shaped brake shoes to be obtained. After bending a substantially central portion of the width into a V shape in the length direction, the V shape metal plate is obtained. A T-shaped portion having a flat portion and a protruding portion perpendicular to the flat portion and a portion perpendicular to the V-shaped portion. After processing into a shape and further processing into a continuous spiral shape so that the protruding part is inside, cut at the part where an arc brake shoe of the required size can be formed and shifted to the left and right cut surfaces A plurality of divided arc-shaped metal workpieces are obtained, and then each divided arc-shaped metal workpiece is processed into an arc shape in which the upper and lower surfaces are parallel by correcting the left and right misalignment of each cut surface, and then the arc-shaped metal Grind on the flat part of the outer surface of the workpiece A method of manufacturing an arc-shaped brake shoes, characterized in that the or integrally formed to fix the member.
Furthermore, the present invention relates to a method of manufacturing the above-mentioned arc-shaped brake shoe, wherein a part of the protruding portion of the arc-shaped metal workpiece is welded continuously or partially in an arc shape.

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

  The arc-shaped brake shoe manufactured by the method of the present invention is a single arc-shaped brake shoe using a strip-shaped (rectangular) A metal plate having such a dimension that a single arc-shaped processed product can be obtained. It may be manufactured one by one, and it is formed into a ring shape using a strip (rectangular) B metal plate having dimensions that can produce a ring-shaped metal workpiece, and then divided into 2 to 3 circles An arc-shaped brake shoe may be manufactured, and a large number of arc-shaped brake shoes, ie, a single metal plate, may be used by using a long metal plate having a dimension capable of obtaining a large number (four or more) of arc-shaped brake shoes. A large number of single arc brake shoes may be manufactured.

  In the present invention, the strip-shaped (rectangular) A metal plate refers to a metal plate having such a dimension that one arc-shaped brake shoe can be obtained, and the strip-shaped (rectangular) B metal plate Indicates a metal plate having a size that can be obtained by dividing a ring-shaped metal workpiece to obtain several arc-shaped brake shoes, for example, two or three arc-shaped brake shoes. Further, the long metal plate refers to a metal plate having a dimension that can obtain a plurality of arc-shaped brake shoes, for example, four or more arc-shaped brake shoes.

In the case of using the above-described strip-shaped (rectangular) A metal plate, if a metal plate having the same length as that for obtaining one single arc-shaped brake shoe is used in advance, it is necessary to adjust to a specified size later. It is preferable because there is not.
In addition, even when a strip-shaped (rectangular) B metal plate is used, a metal that has the same length as that obtained by accurately dividing a ring-shaped metal processed product to obtain two or three arc-shaped brake shoes. The use of a plate is preferable because it is not necessary to adjust to the specified dimensions later as in the above case.

  When the arc-shaped brake shoe of the present invention is obtained using a long metal plate, the V-shaped metal plate is bent after substantially bending the central portion of the width of the long metal plate in the length direction. A T-shaped portion having a flat portion and a protruding portion perpendicular to the flat portion and a portion perpendicular to the V-shaped portion. A plurality of arc-shaped brake shoes are manufactured by cutting into parts that can be formed into a shape and an arc-shaped brake shoe having a required size can be formed, or have a flat portion and a protruding portion perpendicular to the flat portion. After processing into a T-shape and then processing into a continuous spiral so that the protruding part is on the inside, cut at the part where an arc brake shoe of the required size can be formed, and the left and right cut surfaces Multiple with slight deviation Divided arc-shaped metal workpieces are obtained, and then each divided arc-shaped metal workpiece is processed into an arc shape in which the upper and lower surfaces are parallel by correcting the left and right deviations of the individual cut surfaces, and a number of arc-shaped brake shoes are obtained. Can be manufactured.

  The material of the strip shape A, B or the 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 a steel plate or an aluminum plate.

  In the present invention, a strip-shaped A or B metal plate or a long metal plate is bent into a V shape in the longitudinal direction at the center of its width, and then from the upper part of the left and right side surfaces of the V-shaped metal plate. Although a part between the lower portions is folded outward in the length direction, there is no particular limitation on the processing method for forming the shape as described above, for example, roll processing using a V-shaped roller die or the like, or It can be processed by a method such as bending using a press. 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 an arc 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 using a long metal plate, after processing into a T shape, after cutting at a portion where an arc brake shoe of a required size can be formed or processing into a T shape, After processing into a continuous spiral shape so that the protruding portion is on the inside, the brake shoe is manufactured by cutting at a portion where an arc brake shoe having a required size can be formed. In addition, there is no restriction | limiting in particular about the length of a elongate metal plate, It is preferable that it is the length which can produce about 4-12 single circular-arc 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 an arc shape from expanding, or after being formed into a T shape by pressure contact or a circle. After processing into an arc shape, the upper part of the protruding part (the flat part side of the metal plate processed into an arc shape) is welded in the circumferential direction by seamless welding, spot welding or the like, or only a 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 a material of the friction member fixed to the flat portion of the arc-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 fiber. Binders containing fibrous materials such as 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, 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.
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 can be attached to the flat portion of the outer surface of the arc-shaped metal workpiece by an adhering method or a method by integral molding. Of these, the adhering method can be adhering with, for example, riveting or an adhesive. . 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 arc-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. 1-6 is a figure which shows the manufacturing process of the circular arc-shaped brake shoe which becomes one Example of this invention, Among these, FIG. 1 is a perspective view of the steel plate of the strip shape A of the dimension from which a single brake shoe is obtained. 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, and FIG. 3 is a diagram illustrating the length of the upper half of the left and right side surfaces of the V-shaped steel plate. 4 is a perspective view of a substantially V-shaped steel plate folded outward in the 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-shaped steel shown in FIG. FIG. 6 is a plan view of an arcuate steel plate processed so that the protruding portion of the plate is inside, and FIG. 6 is a plan view of an arcuate brake shoe according to the present invention in which a friction member is bonded to a flat part on the outer surface of the arcuate steel plate. is there.

  FIG. 7 is a plan view of the arcuate steel plate showing a state in which the upper part of the projecting portion of the arcuate steel plate shown in FIG. FIG. 8 is a plan view of the arcuate steel plate showing a state in which spot welding is partially applied to the upper part of the projecting portion of the arcuate steel plate shown in FIG. 5 (inside the flat part of the arcuate steel plate), and FIG. It is a perspective view of the ring-shaped steel plate processed so that the protrusion part of a T-shaped steel plate might become inside.

  10 to 12 are views showing a manufacturing process of an arc-shaped brake shoe according to another embodiment of the present invention, in which FIG. 10 is continuously arranged so that the protruding portion of the T-shaped steel plate is inside. FIG. 11 is a front view of a split arc-shaped steel plate obtained by cutting the spiral steel plate shown in FIG. 10, and FIG. 12 is an individual cut surface of the split arc-shaped steel plate shown in FIG. It is a front view of the single circular arc steel plate which correct | amended right and left deviation of.

Example 1
As shown in FIG. 1, a strip-shaped steel plate 1 having dimensions of 300 mm in length (length), 63 mm in width (width) and 3 mm in thickness is prepared. As shown in FIG. 2, an inverted V-shaped roller die is prepared. Is used to produce a V-shaped steel plate 2 by bending the substantially central portion of the width of the steel plate 1 into a V-shape in the length direction. Further, as shown in FIG. The upper part is folded back in the length direction from the central part of the left and right side surfaces, and then the V-shaped part remaining in the press is pressed by applying pressure from the outside to the inside. As shown in FIG. ) A T-shaped steel plate 5 processed into a T-shape having a flat portion 3 having a width of 300 mm and 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, the arcuate steel plate 6 is manufactured by rolling so that the protruding portion 4 of the T-shaped steel plate 5 obtained in FIG. After the end portion is processed to a predetermined dimensional accuracy and the outer peripheral portion of the flat portion 3 is knurled, as shown in FIG. 6, the fibrous material is applied to the flat portion 3 on the outer surface of the arc-shaped steel plate 6. A friction member 7 obtained by mixing and molding a binder, an organic friction modifier, an inorganic friction modifier, and the like was bonded to obtain an arc brake shoe.

Example 2
As shown in FIG. 7, the upper part of the projecting portion 4 of the arc-shaped steel plate 6 shown in FIG. 5 (inside the flat portion of the arc-shaped steel plate) is continuously subjected to seamless welding 8. Obtained an arc brake shoe through the same steps as in Example 1.

Example 3
As shown in FIG. 8, except that spot welding 9 is partially applied to the upper part (inside the flat part of the arc-shaped steel plate) of the projecting portion 4 of the T-shaped processed product of the arc-shaped steel plate 6 shown in FIG. 5. Obtained an arc brake shoe through the same steps as in Example 1.

Example 4
A strip-shaped B steel plate (not shown) having dimensions of 900 mm in length (length), 63 mm in width (width) and 3 mm in thickness is prepared, and the same process as in Example 1 is performed. A V-shaped steel plate was prepared, and then a T-shaped steel plate having the same dimensions as in Example 1 having a flat portion and a protruding portion perpendicular thereto was prepared.

Next, in the same manner as in Example 1, roll processing was performed so that the protruding portion of the T-shaped steel plate was on the inside, and a ring-shaped steel plate having a notch in part as shown in FIG. 9 was obtained. .
Thereafter, the ring-shaped steel plate obtained above was divided into three equal parts to obtain three arc-shaped steel plates. Thereafter, through the same steps as in Example 1, a friction member was bonded to the flat portion on the outer surface of the arcuate steel plate to obtain an arcuate 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. Furthermore, after turning the upper part from the center of the left and right sides of the V-shaped steel plate outward in the length direction, the V-shaped part remaining in the press is pressed against the inside by applying pressure from the outside to the inside. A T-shaped steel plate processed into a T-shape having a portion and a protruding portion was produced.
Thereafter, the T-shaped steel plate obtained above was cut into a length (length) of 300 mm to prepare nine divided T-shaped steel plates.

Next, it roll-processed so that the protrusion part of each division | segmentation T-shaped steel plate might become inside, and obtained nine arc-shaped steel plates of the same dimension as Example 1. FIG.
Thereafter, the friction member was bonded to the flat portion on the outer surface of the arcuate steel plate through the same process as in Example 1 to obtain an arcuate brake shoe.

Example 6
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. Furthermore, after folding the upper half of the left and right sides of the V-shaped steel plate outward in the length direction, the V-shaped part remaining in the press is pressed from the outside to the inside, and the flat part And a T-shaped steel plate processed into a T-shape having a protruding portion.
Thereafter, the continuous spiral steel plate 11 shown in FIG. 10 was obtained by rolling the T-shaped steel plate obtained above.

Next, the spiral steel plate 11 obtained above is cut into nine equal parts with respect to the length direction (part where nine ring-shaped brake shoes shown in the first embodiment can be formed) as shown in FIG. Nine divided arc-shaped steel plates 13 were produced in which the upper and lower surfaces with some deviation 12 are not parallel to the left and right cut surfaces shown. Next, the left and right deviations of the individual cut surfaces of each divided arc-shaped steel plate 13 are corrected, and the left and right cut surfaces of the shape shown in FIG. Nine single arc-shaped steel plates 14 were produced.
Thereafter, the friction member was bonded to the flat portion of the outer surface of the single arcuate steel plate 14 through the same process as in Example 1 to obtain an arcuate brake shoe.

It is a perspective view of the steel plate of the strip shape A of 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 top view of the circular-arc-shaped steel plate processed so that the protrusion part of the T-shaped steel plate shown in FIG. 4 might become inside. It is a top view of the arc-shaped brake shoe which becomes this invention which adhered the friction member to the flat part of the arc-shaped steel board outer surface.

FIG. 6 is a plan view of the arcuate steel plate showing a state where the upper part of the protruding portion of the arcuate steel plate shown in FIG. It is a top view of the arc-shaped steel plate which shows the state which performed the spot welding partially on the upper part of the protrusion part of the arc-shaped steel plate shown in FIG. It is a perspective view of the ring-shaped steel plate processed so that the protrusion part of a T-shaped steel plate might become inside. 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 division | segmentation circular arc steel plate which cut | disconnected the spiral steel plate shown in FIG. It is a front view of the single arc-shaped steel plate which correct | amended the right and left deviation of the cut surface of the division | segmentation arc-shaped steel plate shown in FIG.

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 Arc-shaped steel plate 7 Friction member 8 Seamless welding 9 Spot welding 10 Ring-shaped steel plate 11 Spiral steel plate 12 Displacement 13 Divided circle Arc-shaped steel plate 14 Single arc-shaped steel plate

Claims (5)

  A strip-shaped A metal plate having a dimension capable of obtaining a single arc-shaped brake shoe is bent into a V shape in the longitudinal direction at the center of its width, and then both left and right side surfaces of the V-shaped 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. Further, the arc-shaped metal workpiece is obtained by processing into an arc shape so that the protruding portion is on the inside, and then a friction member is fixed to the flat portion of the outer surface of the arc-shaped metal workpiece or is integrally formed. A method of manufacturing an arc brake shoe.   A strip-shaped B-shaped metal plate having a dimension capable of obtaining a single ring-shaped metal workpiece is bent into a V shape in the longitudinal direction at the center of its width, and then the left and right sides of the V-shaped metal plate. A part between the upper part and the lower part of the surface 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 Then, after processing into a ring shape so that the protruding portion is on the inside, it is cut at a portion where an arc brake shoe of the required size can be formed to obtain several divided arc-shaped metal workpieces, A method of manufacturing an arc-shaped brake shoe, wherein a friction member is fixed to or integrally formed with a flat portion on the outer surface of each arc-shaped metal workpiece.   After a long metal plate having a dimension capable of obtaining a plurality of arcuate brake shoes is bent into a V shape in the longitudinal direction at the center of its width, 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 divided T-shaped metal workpieces are obtained by cutting at a portion where an arc-shaped brake shoe having a required size can be formed. Further, for each of the divided T-shaped metal workpieces, the protruding portion is on the inside. An arc-shaped brake shoe is produced by processing an arc-shaped metal workpiece so as to become, and then fixing or integrally molding a friction member on a flat portion of the outer surface of the arc-shaped metal workpiece Method.   After a long metal plate having a dimension capable of obtaining a plurality of arcuate brake shoes is bent into a V shape in the longitudinal direction at the center of its width, the upper part of the left and right side surfaces of the V shape metal plate A portion 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, After processing into a continuous spiral shape so that the protruding part is inside, it is cut at a part where an arc brake shoe of the required size can be formed, and a plurality of divided arcs with a gap between the left and right cut surfaces Obtain a metal workpiece, and then correct the left and right deviations of each cut surface for each divided arc-shaped metal workpiece and machine it into an arc shape whose upper and lower surfaces are parallel to obtain an arc-shaped metal workpiece. Flat outer surface of arc-shaped metal workpiece Manufacturing method of arcuate brake shoes, characterized in that the or integrally molded to secure the friction member. The method for manufacturing an arc brake shoe according to claim 1, 2, 3 or 4, wherein a part of the projecting portion of the arc-shaped metal workpiece is welded continuously or partially in an arc shape.

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