JP4764091B2 - Ring brake shoe manufacturing method - Google Patents

Description

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

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.

  In order to eliminate the above-mentioned drawbacks, the present inventors, as shown in Patent Documents 2 and 3, after bending a strip-shaped metal plate into a V-shape in the longitudinal direction at a substantially central portion of its width. The part between the upper end and the lower end of the left and right side surfaces of the V-shaped metal plate is folded back outward in the length direction, and then pressed by applying pressure from the outer side to the inner side of the V-shaped part. Processed into a T-shape having a protruding portion, and further processed into a ring shape or an arc shape so that the protruding portion is inside, and then a friction member is fixed to the flat portion of the ring-shaped or arc-shaped outer surface or integrated. A method of manufacturing a brake shoe by molding was devised.

Japanese Patent Application No. 2005-177869 Japanese Patent Application No. 2005-180512

  However, in the method shown above, when processing from a V-shape to a T-shape, if the pressure contact force is too weak, the center portion (the apex portion of the joint) of the top surface of the T-shape is curved as shown in FIG. (R) remains and cannot be completely adhered, resulting in a gap. In some cases, the upper part (the flat part side) of the protruding part must be welded entirely or partially. For this reason, a new problem of taking time and effort has arisen.

  The present invention provides an economical and inexpensive method of manufacturing a ring-shaped brake shoe with a simple operation, with as little material as possible disposed of and no gap formed in the center of the T-shaped upper surface. .

  In the present invention, a short block-shaped metal having a dimension capable of obtaining a single brake shoe is processed into a T-shape having a flat portion and a protruding portion perpendicular thereto by a hot rolling method. A ring-shaped brake shoe is produced by processing a ring-shaped metal workpiece so as to become a ring-shaped metal workpiece, and then fixing or integrally molding a friction member on a flat portion of the outer surface of the ring-shaped metal workpiece. Regarding the method.

  Further, the present invention processes a long block-shaped metal having a dimension capable of obtaining a plurality of brake shoes into a T-shape having a flat portion and a protruding portion perpendicular thereto by a hot rolling method. A plurality of divided T-shaped metal workpieces are obtained by cutting at a portion where a ring-shaped brake shoe of the size can be formed, and the protruding portion is on the inside of each divided T-shaped metal workpiece. The present invention relates to a method for manufacturing a ring-shaped brake shoe, characterized in that a ring-shaped metal workpiece is obtained by processing into a ring shape, and then a friction member is fixed or integrally formed on a flat portion of the outer surface of the ring-shaped metal workpiece.

Further, the present invention is to process a long block-shaped metal having a dimension capable of obtaining a plurality of brake shoes into a T shape having a flat portion and a protruding portion perpendicular thereto by a hot rolling method. After processing into a continuous spiral shape so that the protruding part of the letter-shaped processed product is inside, it is cut at the part where a ring-shaped brake shoe of the required size can be formed and the left and right cut surfaces are misaligned Obtain a plurality of split ring-shaped metal workpieces, and then correct the left and right misalignment of each cut surface for each split ring-shaped metal workpiece and process it into a ring shape with parallel upper and lower surfaces. And then, a friction member is fixed to the flat portion of the outer surface of the ring-shaped metal workpiece or integrally molded.
Furthermore, the present invention relates to a method for manufacturing the ring-shaped brake shoe, wherein the ring-shaped metal workpiece is provided with a notch in a part in the circumferential direction.

  The ring-shaped brake shoe obtained by the method of the present invention can reduce the material to be disposed of as much as possible and can be manufactured by a simple operation without generating a gap at the center of the T-shaped upper surface. It is an economical and inexpensive ring-shaped brake shoe and is extremely suitable industrially.

The ring-shaped brake shoe manufactured in the present invention may be manufactured as a single ring-shaped brake shoe one by one using a short block-shaped metal having a dimension capable of obtaining a single ring-shaped brake shoe. In addition, a plurality of ring-shaped brake shoes are manufactured by cutting at a portion where a ring-shaped brake shoe having a required size can be formed using a long block-shaped metal having a dimension capable of obtaining a plurality of ring-shaped brake shoes. Also good.
In the present invention, when a single ring-shaped brake shoe is manufactured, the short block-shaped metal to be used is a metal having a length that is the same as the dimension for obtaining a single ring-shaped brake shoe in advance. This is preferable because there is no need to adjust to the specified dimensions.

  On the other hand, when manufacturing a plurality of ring-shaped brake shoes using a long block-shaped metal, the long block-shaped metal is processed into a T-shape having a flat portion and a protruding portion perpendicular thereto by a hot rolling method. After that, a plurality of ring-shaped brake shoes are manufactured by cutting at a portion where a ring-shaped brake shoe having a required size can be formed, or processed into a T shape, and then a protruding portion of a T-shaped metal workpiece. After machining into a continuous spiral shape so that the inner ring 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 metal workpieces with misaligned left and right cut surfaces After that, for each divided ring-shaped metal workpiece, the left and right deviations in each cut surface are corrected and processed into a ring shape with the upper and lower surfaces parallel to each other, and a plurality of ring-shaped brake shoes are obtained. It is possible to elephants.

  The material of the block-like metal used in the present invention is not particularly limited as long as it is a ductile metal such as steel, aluminum, or a brass plate. Among these, steel or aluminum is preferably used.

  In the present invention, when processing a short block-shaped metal or a long block-shaped metal into a T-shape, it is processed by a hot rolling method, but this processing method uses, for example, two rolls on the top and bottom, The block metal is processed by moving between the rolls while heating and pressurizing. As an example of the processing method, there is a method of performing hot rolling twice as shown below. In this method, first, as the first hot rolling, one of the rolls has a flat pressed portion and the other uses a roll having a depression in the circumferential direction in the central portion. The block-shaped metal is moved under known heating and pressurizing conditions, and a semicircular protrusion is formed at the central portion on one side of the block-shaped metal.

  Next, the second hot rolling is performed. In this method, one roll uses a roll provided with a recess for forming a T-shaped flat portion in the circumferential direction, and the other roll uses the roll. Each used a roll provided with a recess for forming a projecting portion perpendicular to the flat part in the circumferential direction, and the above-mentioned obtained between the rolls under generally known heating and pressing conditions. A block-shaped metal having a protrusion formed on one side center portion can be moved to obtain a T-shaped metal workpiece having a flat portion and a protruding portion perpendicular to the flat portion.

In addition, the flat part in the T-shaped metal workpiece obtained above corresponds to the shoe rim of the obtained brake shoe, and the protruding part perpendicular to the flat part corresponds to the shoe web of the brake shoe. .
After processing into a T-shape, processing is performed into a ring shape so that the protruding portion is on the inside. Roll processing is optimal for the method of processing into the ring shape, but is not necessarily limited to this method.

  In the present invention, when using a long block metal, after processing it into a T shape, cut it at a portion where a ring-shaped brake shoe of the required size can be formed or process it into a T shape. 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. In addition, there is no restriction | limiting in particular about the length of the elongate block-shaped metal to be used, However, 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 can be processed by roll processing, press processing or the like in the same manner as described above.

As a 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 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 ring-shaped metal workpiece by an adhering method or an integral molding method. Of these, the adhering method can be fixed by, for example, riveting or using 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 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.
1 to 6 are diagrams showing a manufacturing process of a ring-shaped brake shoe according to an embodiment of the present invention. Of these, FIG. 1 shows a short block-shaped steel having a dimension capable of obtaining a single ring-shaped brake shoe. 2 is a partially omitted front view showing the first hot rolling method, FIG. 3 is a partially omitted perspective view showing the second hot rolling method, and FIG. 4 is a flat portion and a protruding portion perpendicular thereto. FIG. 5 is a perspective view and a perspective view of a ring-shaped steel processed product in which a protruding portion of the T-shaped steel processed product shown in FIG. 6 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 product.

FIGS. 7 to 10 are views showing a manufacturing process of a ring-shaped brake shoe according to another embodiment of the present invention. Of these, FIG. 7 shows a process in which a long block steel is processed into a T-shape, and further a T-shape. FIG. 8 is a plan view of a spiral steel processed product obtained by continuously processing the projecting portion of the shaped steel processed product inside, and FIG. 8 is a single ring-shaped steel processed product obtained by cutting the spiral steel processed product shown in FIG. FIG. 9 is a front view of FIG. 8, and FIG. 10 is a front view of a single ring-shaped steel processed product shown in FIGS.
FIG. 11 is a front view of a conventional T-shaped processed product.

Example 1
As shown in FIG. 1, a block-shaped steel 1 is prepared, and a lower roll 2 having a flat pressing portion and an upper roll 4 provided with a depression 3 in the circumferential direction of the central portion are used. The block-shaped steel 1 was moved while being rotated and heated and pressed between the rolls (first hot rolling), and the protrusion 5 was formed at the center of one side of the block-shaped steel 1.

  Next, in order to make the block-shaped steel 1 having the protrusion 5 formed in the central portion on one side into a T shape, as shown in FIG. 3, a recess 6 for forming a portion that becomes a T-shaped flat portion in the circumferential direction. Using the lower roll 7 provided and the upper roll 9 provided with a recess 8 for forming a protruding portion perpendicular to the flat part, these rolls are rotated, and the block-shaped steel is heated and pressed between the rolls. 1 is moved (second hot rolling), and the flat portion 10 having the dimensions shown in FIG. 4 is longitudinal (length) 900 mm, lateral (width) 45 mm, flat portion thickness 3 mm, and protruding portion height 9 mm. And the T-shaped steel processed goods 12 which have the protrusion part 11 were produced.

  Next, as shown in FIG. 5, a ring shape having a notch 13 in a part in the circumferential direction by rolling so that the protruding portion 11 of the T-shaped steel processed product 12 obtained in FIG. 4 is inside. The steel processed product 14 was produced, and the end portion of the protruding portion 11 was processed with a predetermined dimensional accuracy, and the outer peripheral portion of the flat portion 10 was knurled. Thereafter, as shown in FIG. 6, the friction obtained by mixing and forming a fibrous material, a binder, an organic friction modifier, an inorganic friction modifier, and the like on the flat portion 10 on the outer surface of the ring-shaped steel processed product 14. The member 15 was bonded to obtain a ring-shaped brake shoe.

Example 2
A long block-shaped steel (not shown) was prepared, and a T-shaped steel processed product having a flat portion and a protruding portion was produced through the same steps as in Example 1 below.
Thereafter, the T-shaped steel processed product is cut into a length (length) of 900 mm so as to be divided into three equal parts, and three divided T-shaped steel processed products having the same dimensions as in Example 1 are obtained. It was.

Next, it rolled so that the protrusion part of each division | segmentation T-shaped steel processed goods might become inside, and the ring-shaped steel processed goods which have a notch in a part of circumferential direction similarly to Example 1 were obtained. .
Thereafter, the friction member was bonded to the flat portion of the outer surface of the ring-shaped steel product through the same steps as in Example 1 to obtain a ring-shaped brake shoe.

Example 3
A long block steel (not shown) was prepared, and a T-shaped steel plate having a flat portion and a protruding portion was obtained through the same steps as in Example 1 below.
Thereafter, the T-shaped steel processed product obtained above was rolled to obtain a continuous spiral steel processed product 16 having a length (length) of 2700 mm shown in FIG.

Next, the spiral steel processed product 16 obtained above is cut at a portion where the ring-shaped brake shoe shown in Example 1 can be formed, and has a notch 17 as shown in FIGS. Three split ring-shaped steel processed products 19 having a deviation 18 at the cut portions (the upper and lower surfaces are not parallel) were produced. Next, the left and right shifts 18 of each divided ring-shaped steel processed product 19 are corrected to obtain a single ring-shaped steel processed product 20 whose upper and lower surfaces are parallel to each other in the left and right cut portions of the shape shown in FIG. Produced.
Thereafter, a friction member was bonded to the flat portion 10 of the ring-shaped steel processed product 20 through the same process as in Example 1 to obtain a ring-shaped brake shoe.

It is a perspective view of block-shaped steel. It is a partially omitted front view showing a first hot rolling method. It is a partially omitted perspective view showing a second hot rolling method. It is a perspective view of the T-shaped steel processed product which formed the flat part and the protrusion part perpendicular | vertical to it. It is a perspective view of the ring-shaped steel processed product which processed the protrusion part of the T-shaped steel processed product shown in FIG. 4 into the ring shape so that it might become inside. It is a perspective view of the ring-shaped brake shoe which becomes this invention which adhered the friction member to the flat part of the ring-shaped steel processed goods outer surface.

It is a top view of the spiral steel processed goods which processed long block-shaped steel into the T shape, and also processed continuously so that the projection part of a T-shaped steel processed goods may become inside. It is a top view of the single ring-shaped steel processed goods which cut | disconnected the spiral steel processed goods shown in FIG. It is a front view of FIG. It is a front view which shows the state which correct | amended right and left deviation in the single ring-shaped steel processed goods shown in FIG.8 and FIG.9. It is a front view of the conventional T-shaped processed product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Block-shaped steel 2 Lower roll 3 Indentation 4 Upper roll 5 Protrusion 6 Indentation 7 Lower roll 8 Indentation 9 Upper roll 10 Flat part 11 Protruding part 12 T-shaped steel processed product 13 Notch 14 Ring-shaped steel processed product 15 Friction member 16 Spiral steel product 17 Notch 18 Misalignment 19 Split ring steel product 20 Single ring steel product

Claims (4)

Using a short block-shaped metal having dimensions that can provide a single brake shoe, using a lower roll with a flat pressing portion and an upper roll with a depression in the circumferential direction of the center, and rotating these rolls, and Block-shaped metal moved (first hot rolling) while heating and pressurizing between rolls to form a protrusion on one side center of the block-shaped metal, and then a block-shaped metal formed with a protrusion on one side center Using a lower roll provided with a recess for forming a portion that becomes a T-shaped flat portion in the circumferential direction and an upper roll provided with a recess for forming a protruding portion perpendicular to the flat portion. rotate these roles, and by while heated and pressed between rolls move blocks like metal (second hot rolling), and processed into a T-shape with a vertical protruding portion to it and the flat portion, Further, the ring-shaped processed product is obtained by processing into a ring shape so that the protruding portion is on the inside, and then the friction member is fixed to the flat portion of the outer surface of the ring-shaped metal processed product or integrally formed. A method for manufacturing a ring-shaped brake shoe. Using a long block-shaped metal having a dimension capable of obtaining a plurality of brake shoes, using a lower roll with a flat pressing portion and an upper roll provided with a depression in the circumferential direction of the central portion, and rotating these rolls, and Block-shaped metal moved (first hot rolling) while heating and pressurizing between rolls to form a protrusion on one side center of the block-shaped metal, and then a block-shaped metal formed with a protrusion on one side center Using a lower roll provided with a recess for forming a portion that becomes a T-shaped flat portion in the circumferential direction and an upper roll provided with a recess for forming a protruding portion perpendicular to the flat portion. rotate these roles, and by while heated and pressed between rolls move blocks like metal (second hot rolling), and processed into a T-shape with a vertical protruding portion to it and the flat portion, A plurality of divided T-shaped metal workpieces are obtained by cutting at a portion where a ring-shaped brake shoe having a required size can be formed, and the protruding portion is on the inner side of each divided T-shaped metal workpiece. A ring-shaped brake shoe comprising: a ring-shaped metal work product obtained by processing into a ring shape, and then a friction member being fixed or integrally formed on a flat portion of the outer surface of the ring-shaped metal work product. Production method. Using a long block-shaped metal having a dimension to obtain a plurality of brake shoes, using a lower roll whose pressing part is flat and an upper roll provided with a depression in the circumferential direction of the central part, these rolls are rotated, In addition, the block-shaped metal is moved (first hot rolling) while heating and pressurizing between the rolls to form a protrusion at one side central portion of the block-shaped metal, and then a block shape having a protrusion formed at the one-side central portion A lower roll provided with a recess for forming a portion that becomes a T-shaped flat portion in the circumferential direction, and an upper roll provided with a recess for forming a protruding portion perpendicular to the flat portion. It used to rotate these roles, and by while heated and pressed between rolls move blocks like metal (second hot rolling), and processed into a T-shape with a vertical protruding portion to it and the flat portion Further, after processing into a continuous spiral shape so that the protruding portion of the T-shaped processed product is inside, it is cut at a portion where a ring-shaped brake shoe of a required size can be formed, and the left and right sides of the cut surface A plurality of divided ring-shaped metal workpieces with gaps are obtained, and then each divided ring-shaped metal workpiece is processed into a ring shape in which the upper and lower surfaces are parallel by correcting the left and right deviations in the individual cut surfaces. A method of manufacturing a ring-shaped brake shoe, comprising: obtaining a shaped metal workpiece, and then fixing or integrally molding a friction member on a flat portion of the outer surface of the ring-shaped metal workpiece.   The method for manufacturing a ring-shaped brake shoe according to claim 1, 2, or 3, wherein the ring-shaped metal processed product is provided with a notch in a part in a circumferential direction.

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