JPH10118721A - Die for bending metal material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an embossing part on the surface of a metal from being crushed by arranging plural pressing dies in steps like series in row so that the projecting degree is increased orderly from an end of the series toward another end with a spring, and arranging spacers on the end of the die. SOLUTION: This die is composed of a receiving die 11 having plural projections and a pressing die 12 having one projection. Then, plural the pressing dies are arranged in stairs so that the degree of projecting of the die part is increased orderly from one direction of the series toward another. In the pressing die 12, spacers 13 are formed on the both ends. In the spacer 13, the both end parts are enough formed by one body so as to be projected than the central part, or plate like members 15 are formed enough by being arranged on the both end parts of the pressing die, Further, another composing members 16 are also enough arranged on the both ends of the pressing die. Therefore, the pressure difference of the spring of the die is made without requiring from finely regulating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal mold for bending a sheet-like metal material into a corrugated shape. In particular, the present invention relates to a metal material bending die for processing a sheet material in which a plurality of holes and embossed portions are formed in a thin metal plate into a corrugated shape without crushing the embossed portions. The mold according to the invention is particularly suitable for producing a substance and / or a filling material to be filled in a heat exchange tower.

[0002]

2. Description of the Related Art In a so-called exchange column in which a liquid is introduced from above and a gas is introduced from below and the two are brought into contact in the column to exchange substances and / or heat, a packing material is arranged in the column to transfer the liquid. It is uniformly spread on the surface of the filler to improve the gas-liquid contact efficiency. Such fillers typically form a plurality of corrugated sheet materials formed by forming holes in the surface and / or further processing the embossed sheet material into a corrugated shape, the corrugations intersecting each other. It is constituted by laminating as follows.

In order to corrugate a thin sheet material, generally,
A metal mold is used in which a metal material is sandwiched between a receiving die and a pressing die, and the pressing die is pressed against the receiving die to bend the metal material. In order to process such a waveform, a device having a structure in which the degree of protrusion of the pressing mold portion increases in order from one direction of the row to the other is used. The structure of a general mold of this type is shown in FIG.

[0004] A general metal material bending die shown in FIG. 3 includes a receiving die 1 and a plurality of pressing dies 2a to 2d. The pressing dies are arranged stepwise so that the degree of protrusion is the largest at 2a and the smallest at 2d. The rear end of each pressing mold is usually connected to a spring member such as a coil spring or a gas spring. In order to corrugate a thin plate using such a die, the thin plate is placed on the receiving die 1 and the pressing die is pressed down. First, the end of the thin plate material is processed into a corrugated shape by the pressing die 2a having the largest degree of protrusion. When the pressing die is further depressed, the pressing die 2a is held at that position while the thin plate material is pressed by the spring contraction, and then the pressing die 2b comes into contact with the plate material to perform corrugation processing. . After that, similarly, press mold 2
Waveforms are sequentially processed by c and 2d.

[0005]

However, in such dies, it is extremely difficult to adjust the pressing pressure of each of the dies because the dies have different degrees of protrusion. For example, when the initial contraction pressure of the spring is reduced and the press pressure at the final point is adjusted to an optimum value, the initial press pressure is insufficient, and the sheet material is insufficiently bent. On the other hand, when the initial contraction pressure of the spring is increased, the press pressure at the final point is excessively large, and a problem such that the embossing formed on the surface of the plate material is crushed occurs. This will be specifically described below.
A spring is connected to each stamping die,
The spring starts to contract from the point where the tip of the pressing mold comes into contact with the plate material, and when all the waveform processing ends,
Each spring will reach its final destination. In order to press all the waveforms uniformly, the initial pressure in each spring and the pressure at the final point must match. However, in an apparatus of the type described above, since a plurality of pressing dies are arranged in a stepwise manner, the stroke lengths of springs connected to the respective pressing dies are different. And the final press pressure will be different. For example, if the final pressing pressure in each pressing die is made equal, the initial pressing pressure in the pressing die 2a having the longest spring stroke length becomes too low, resulting in insufficient bending of the plate material. Further, if the initial pressing pressures in the respective pressing dies are made equal, the final pressing pressure in the pressing die 2a having the longest spring stroke length becomes too high, and the emboss formed on the surface of the plate material is broken. .

[0006]

SUMMARY OF THE INVENTION The inventor of the present invention addresses the problems caused by the difference in the press pressure between the pressing dies in the conventional metal plate material bending die of the type described above. As a result of intensive research to solve the problem, by arranging spacers at both ends of one or both of the pressing die and the receiving die, it is possible to solve the problem of crushing the emboss of thin sheet material due to excessive press pressure Find out what you can do,
The present invention has been completed.

That is, the present invention provides a metal mold for bending a metal material by pressing the metal mold between the metal mold and the metal mold and pressing the metal mold against the metal mold.
The degree of protrusion of the plurality of pressing dies by the spring is
The rows are arranged in a stepwise manner so as to increase in order from one direction to the other, and furthermore, a spacer is disposed at one or both ends of a receiving mold or a pressing mold. The present invention relates to a metal material bending die.

A specific example of a metal material bending die according to the present invention will be described below with reference to the drawings.

FIG. 1 shows the outline of a metal material bending die according to one embodiment of the present invention. The mold includes a receiving mold 11 having a plurality of protrusions and a pressing mold 12 having a single protrusion. The pressing mold according to the present invention is
As shown in FIG. 3, a plurality of pressing dies are formed by springs.
The pressing mold portions are arranged in a stepwise manner such that the degree of protrusion of the pressing mold portions increases in order from one direction to the other, but in FIG. Only the mold is shown. The pressing die 12 has spacers 13 formed at both ends. Spacer 13
1a may be formed by molding the pressing mold 12 so that both ends protrude from the central portion by integral molding as shown in FIG. 1a, or as shown in FIG.
It may be formed by arranging a plate-like spacer member 15 at both ends of the pressing mold 12, and further, as shown in FIG. 1c, another component member 16 is arranged at both ends of the pressing mold. May be formed. In the spacer portion, a ridge-shaped projection higher than the ridge-shaped projection of the pressing die is formed, and thereby the ridge-shaped projection is stepped.

The pressing die 12 and the receiving die 11 are configured as described above, and the metal sheet material to be corrugated has a width smaller than the distance between the spacers, and the plate material is formed in the portion 14 between the spacers. When the corrugation is performed by arranging, in the corrugating process of the thin plate material, when each of the pressing dies 12 comes into contact with the receiving die 11, the central portion of the pressing die 12 on which the thin plate material is disposed. A gap is formed between the surface 14 and the surface of the receiving mold 11 by the spacer. For this reason, even if the press pressure at the final point of the spring connected to the pressing die is excessive, the plate material is protected from excessive pressure by the presence of the gap. The problem that the emboss formed on the surface of the plate material is crushed is solved.

Therefore, if the metal material bending die according to the present invention is used, the adjustment of each spring connected to each of the pressing dies arranged in a stepwise manner only needs to consider the initial press pressure. This eliminates the need for fine adjustment of each spring in consideration of the press pressure at the final point.

Also, as shown in FIG. 2, the same effect can be obtained by forming spacers at both ends of the receiving die instead of the pressing die. FIG. 2 shows an outline of a metal material bending die according to another embodiment of the present invention. In the receiving die according to this embodiment, spacers 17 are arranged at both ends. The spacer 17 may be formed by molding the receiving mold 11 so that both ends protrude by integral molding as shown in FIG. 2A, or FIG.
As shown in FIG. 2, a plate-shaped spacer member 19 may be arranged at both ends of the receiving mold 11, and further, as shown in FIG. It may be formed by disposing the member 20. In the spacer portion, a ridge-shaped protrusion higher than the ridge-shaped protrusion of the receiving mold is formed, and thereby the ridge-shaped protrusion is stepped.

Further, spacers may be formed at both ends of both the pressing die and the receiving die. In this case, even if the thickness of the spacer formed in each of the pressing die and the receiving die is small, a larger gap that is the sum of the spacer gaps of both the dies is formed at the time of pressing. This is advantageous when corrugating a large plate material.

[0014]

The metal material bending die according to the present invention is
Despite the fact that the degree of protrusion of the plurality of pressing mold parts is arranged in a stepwise manner so as to increase in order from one direction to the other in the row, the pressure difference between the springs of each pressing mold is delicate. Therefore, the problem of the prior art that the final pressing pressure becomes excessive and the embossing processed on the surface of the metal material is crushed is solved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an outline of a pressing die and a receiving die of a metal material bending die according to one embodiment of the present invention.

FIG. 2 is a conceptual view showing an outline of a pressing die and a receiving die of a metal material bending die according to another embodiment of the present invention.

FIG. 3 is a diagram illustrating a metal material bending process in which a plurality of stamping dies used in the art are arranged in a stepwise manner such that the degree of protrusion increases in order from one direction of a row toward the other. It is a conceptual diagram which shows the outline of a metal mold | die.

[Explanation of symbols]

 1,11 Receiving mold 2,2a, 2b, 2c, 2d, 12 Pressing mold 13,17 Spacer 15,19 Spacer member

Claims (1)

[Claims] A metal mold is bent between a receiving die and a pressing die by pressing the pressing die against the receiving die with the metal material interposed between the receiving die and the pressing die. , The degree of protrusion is increased stepwise from one direction of the row to the other by the spring, and furthermore, spacers are provided at both ends of one or both of the receiving mold and the pressing mold. A metal mold for bending a metal material, wherein a metal is disposed.