JP2013018016A - Dimension compressing method and thickness increasing method by press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dimension compressing method and a thickness increasing method of compressing or increasing the dimension in a prescribed region by using a press.SOLUTION: By the use of this method, an objective region 5 can be flattened with a length dimension (L2) decreased in a first pressing step maintained as it is. Therefore, the length dimension can be simply compressed with the object region 5 kept flat. Furthermore, by the use of this thickness increasing method by press, a material in a compression region 26 can be flown plastically to a region 28 other than the compression region 26. In this way, the material in a specified region 28 other than the compression region 26 can be increased in thickness.

Description

  The present invention relates to a dimension compression processing method and a thickness increase processing method for compressing or increasing the size of a predetermined portion using plastic deformation of a metal material during pressing.

  One basic metal processing method is pressing. For example, as in the invention disclosed in [Patent Document 1] below, a technique for extending the dimension of a predetermined portion by utilizing plastic deformation of a metal material generated during pressing is known.

Japanese Utility Model Publication No. 05-000351

  However, the invention disclosed in [Patent Document 1] compresses and reduces the dimension in the press direction and extends that amount in the horizontal direction (direction perpendicular to the press direction), and in the vertical direction (press direction). The lateral dimensions cannot be reduced by pressing. Also, the thickness in the press direction cannot be increased.

  Here, for example, as shown in FIG. 3 (c), a product having a rising portion 3, 3 ′ having a height L1, and a dimension L2 between the rising portions 3, 3 ′ is L2 <(2 × L1). Consider the case of manufacturing. As a conventional example for manufacturing such a product, first, a metal plate is punched as shown in FIG. 3A to manufacture an intermediate product 10a. Next, as shown in FIG. 3 (b), a predetermined portion of the intermediate product 10a is bent to form the rising portions 3, 3 'to obtain an intermediate product 10b. The interval between the rising portions 3 and 3 'of the intermediate product 10b, that is, the length dimension L3 of the connecting portion 5 is a value around (2 × L1) and is larger than the target dimension L2. In such a case, in the invention disclosed in [Patent Document 1], the length L3 of the connecting portion 5 cannot be reduced. Therefore, in the conventional method, as shown in FIG. 3C, the connecting portion 5 is bent to reduce the length dimension L3 to the dimension L2, and the final product 10c is manufactured. The bent portion in the connecting portion 5 is for adjusting the interval between the rising portions 3 and 3 '(the length dimension L3 of the connecting portion 5) to the dimension L2, and is unnecessary in terms of product performance. This bent portion is not preferable because it increases the height of the product 10c.

  As another manufacturing method, for example, as shown in FIG. 3 (d), a member in which the rising portion 3 is formed and a member in which the rising portion 3 ′ is formed are individually prepared and connected. There is a method of manufacturing the final product 10d by joining with the member 7. In the manufacturing method of the product 10d, it is necessary to prepare each member individually, which increases the manufacturing process and deteriorates handling properties. Moreover, since the joining process increases, joining equipment is required, and the manufacturing process is complicated, which is not preferable.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a dimension compression processing method and a thickness increase processing method for compressing or increasing the size of a predetermined portion using a press.

The present invention
(1) a first pressing step of pressing a predetermined target portion 5 of the intermediate product to form a substantially arc-shaped curved portion 20, thereby reducing the length of the target portion 5;
A second pressing step of pressing the curved portion 20 while holding a predetermined portion of the intermediate product to prevent the length dimension from being extended and making the curved portion 20 substantially flat,
The above-mentioned problem is solved by providing a dimension compression processing method using a press characterized in that the target portion 5 is made substantially flat while maintaining the reduction in the length dimension.
(2) a first pressing step of pressing a predetermined target portion 5 of the intermediate product to form a substantially bowl-shaped curved portion 24;
A second pressing step of pressing the compression region 26 of the curved portion 24 while holding a predetermined portion of the intermediate product to increase the thickness of the curved portion 24 (region 28) other than the compressed region. The above-described problems are solved by providing a thickening method using a press.

  According to the present invention, the size of a predetermined part can be compressed or increased by pressing.

It is a figure explaining the dimension compression processing method by the press concerning the present invention. It is a figure explaining the thickening processing method by the press which concerns on this invention. It is a figure explaining the conventional method.

  A dimension compression processing method and a thickness increase processing method using a press according to the present invention will be described with reference to the drawings. First, the dimension compression processing method will be described with reference to FIG. Here, the manufacture of the product used in the description of the conventional example in FIG. 3 will be described as an example.

  First, as shown in FIG. 1A, a metal plate having a predetermined thickness is punched out by a known press process to produce an intermediate product 10a. The intermediate product 10a has a portion (3, 3 'in FIG. 1A) to be the rising portions 3, 3' and a connecting portion 5. Since the connecting portion 5 is a target portion of the dimension compression processing method according to the present invention, it is hereinafter referred to as a target portion 5 using the same reference numeral.

  Next, as shown in the intermediate product 10b in FIG. 1B, the portions 3, 3 'of the intermediate product 10a are bent by a well-known method to form the rising portions 3, 3' having the height L1. The interval between the rising portions 3 and 3 'of the intermediate product 10b, that is, the length dimension L3 of the target portion 5 is a value around (2 × L1), which is larger than the target dimension L2.

  Next, as shown in the intermediate product 10e of FIG. 1C, the target portion 5 of the intermediate product 10b is pressed to form a substantially arc-shaped curved portion 20. At this time, the bending portion 20 is formed so that the length dimension L3 of the target portion 5 decreases to the target dimension L2. The curvature or the like of the bending portion 20 varies according to the length dimension L3 of the target portion 5, the target dimension L2, and the like. Further, the curved portion 20 may be formed by a single press or gradually by a plurality of multi-stage presses. The number of presses is appropriately selected according to the material of the metal plate, the hardness, the capacity of the press, the values of the dimension L3, the dimension L2, and the like. The above is the first pressing step of the dimension compression processing method according to the present invention.

  Next, as shown in FIG. 1D, the end of the intermediate product 10e in the length direction, that is, the same direction as the length dimension L3 of the target portion 5 is held by the regulating member 22 or the like. Thereby, the expansion | extension to the length dimension L3 direction of the object site | part 5 is prevented. Next, while maintaining this state, the curved portion 20 of the intermediate product 10e is pressed until it becomes substantially flat. As described above, since the intermediate product 10e is prevented from extending in the length direction of the target portion 5 by the regulating member 22 or the like, the intermediate product 10e cannot return to the intermediate product 10b before the first pressing step. . For this reason, the target part 5 is plastically deformed so that the width direction (the direction of the dimension W in FIG. 1E) and the thickness of the target part 5 are increased. Thereby, as shown in FIG.1 (e), the product 10f in which the curved part 20 became substantially flat is manufactured. The above is the second pressing step of the dimension compression processing method according to the present invention.

  Thus, according to the dimension compression processing method by the press which concerns on this invention, the target site | part 5 can be planarized, maintaining the length dimension (L2) reduced by the 1st press process. Therefore, the length dimension can be simply compressed while the target portion 5 is flat. Thereby, an unnecessary bending part like the product 10c of the conventional manufacturing method can be eliminated, for example. Further, it is possible to eliminate the necessity of joining members as in the conventional product 10d. Furthermore, according to the dimension compression processing method by the press which concerns on this invention, since the dimension of a specific direction can be compressed, the freedom degree of the product manufacture using a press can be improved.

  Next, a thickening method using a press according to the present invention will be described with reference to FIG. First, as shown in FIG. 2A, a metal plate having a predetermined thickness ta is punched out by a known press process to produce a disc-shaped intermediate product 30a.

  Next, as shown in the intermediate product 30b in FIG. 2 (b), the target portion 5 of the intermediate product 30b (in the example of FIG. 2, the central portion of the intermediate product 30b) is pressed to A curved portion 24 is formed. The curvature or the like of the curved portion 24 varies depending on the size and shape of the intermediate product 30a, the target thickness increase, the material of the metal plate, the hardness, and the like. The number of presses for forming the curved portion 24 is also appropriately selected according to the size and shape of the intermediate product 30a, the intended thickness increase, the material of the metal plate, the hardness, the ability of the press machine, and the like. The above is the first pressing step of the thickening processing method according to the present invention.

  Next, as shown in FIG. 2C, a predetermined portion of the intermediate product 30b (in this example, the peripheral portion of the intermediate product 30b) is held by the regulating member 22a or the like. Thereby, the expansion | extension to the peripheral direction of the intermediate product 30b and the object site | part 5 is prevented. Next, the compression area | region 26 which is a part of the curved part 24 of the intermediate product 30b is pressed, maintaining this state. The number of presses at this time is also appropriately selected as in the first pressing step. As described above, since the intermediate product 30b is prevented from extending in the peripheral direction by the regulating member 22a or the like, the curved portion 24 of the intermediate product 30b is plastically deformed toward the region 28 other than the compression region 26 by this press. . As a result, the intermediate product 30b has a shape as shown in the intermediate product 30c in FIG. Then, the material of the compression region 26 gathers in the region 28 other than the compression region 26 by plastic flow, and as a result, as shown in the XX ′ cross-sectional view of FIG. To do. The above is the second pressing step of the thickening processing method according to the present invention.

  As shown in FIGS. 2E and 2E ′, for example, the intermediate product 30c manufactured in this way is subjected to drilling and cutting in the thickened region 28 to obtain an intermediate product 30d. Become. At this time, since the dimension t of the intermediate product 30d is performed on the thickened region 28, it can be made thicker than the thickness ta of the metal plate before processing (the thickness ta of the intermediate product 30a). Thereby, the intermediate product 30d equivalent product which has been conventionally produced by joining the ring member having the width dimension t can be produced only by pressing. The manufactured intermediate product 30d is subjected to further metal processing to become a final product.

  As described above, according to the thickening method using the press according to the present invention, the target region 5 is once bent and the compression region 26 of the curved portion 24 is pressed, so that the material of the compression region 26 is compressed. Other than the region 28 can be plastically flowed. Thereby, it is possible to increase the thickness and thickness of the specific region 28 other than the compression region 26. Therefore, according to the thickening method using a press according to the present invention, the degree of freedom of product manufacture using the press can be improved.

  In addition, since said example is for demonstrating the dimension compression processing method by the press which concerns on this invention, and the thickening processing method, this invention is not limited to said product shape. Further, the shape of the bending portion, the configuration of the regulating member, and the like are not particularly limited to the above example. Furthermore, the present invention can be modified and implemented without departing from the scope of the present invention.

5 Target part
10, 30 Intermediate products
20, 24 Curved part
26 Compression area
28 Area (other than compression area)

Claims (2)

A first pressing step of pressing a predetermined target portion of the intermediate product to form a substantially arc-shaped curved portion, thereby reducing the length of the target portion;
A second pressing step of pressing the curved portion while holding a predetermined portion of the intermediate product to make the curved portion substantially flat while preventing extension of the length dimension,
A dimensional compression processing method using a press, wherein the target portion is made substantially flat while maintaining a reduction in the length. A first pressing step of pressing a predetermined target portion of the intermediate product to form a substantially bowl-shaped curved portion;
A second pressing step of thickening a curved portion other than the compressed region by pressing a compressed region of the curved portion while holding a predetermined portion of the intermediate product;
A thickening processing method using a press characterized by comprising:

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