JPH0970624A - Method for pressing corrugated plate and press working apparatus thereof - Google Patents

Abstract

(57) [Abstract] [Problem] Even if the material is hard and thin or the valley is deep,
The corrugated plate can be formed by stamping without causing cracks. SOLUTION: A corrugated surface 16b is formed on the upper surface of a lower mold 16 while being inclined. The upper die 17 is an elastic die whose lower surface 19a is horizontal.
19 is provided. At the time of stamping, the central portion of the material 11 is pressed by the pressing plate 18 to lower the elastic mold 19. The elastic die 19 elastically deforms to sandwich the material 11 with the corrugated surface 16b of the lower die 16 to form the corrugated plate 12. Due to the inclination of the corrugated surface 16b, corrugated peaks are sequentially formed on the material 11 one by one. [Effect] As a result, the tensile stress generated in the material 11 at one time is reduced. As the molding progresses, the material gradually approaches from the outside, which is the free end side of the material 11. Therefore,
Does not crack.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated plate pressing method and a corrugated plate pressing apparatus, and more particularly, to a corrugated plate pressing method and a corrugated plate press forming method using a mold body made of an elastic body. Pressing equipment

[0002]

2. Description of the Related Art Conventionally, a metal corrugated plate in which corrugation peaks and troughs are arranged in parallel is formed by roll molding. However, since roll forming has drawbacks such as poor productivity, it is conceivable to form the corrugated plate by stamping.

When a corrugated plate is formed by stamping, as shown in FIG.
As shown in, the lower mold 1 is a pair of molds that open and close up and down.
It is conceivable that both the upper mold 2 and the upper mold 2 are made of a rigid body such as a metal, and the upper surface of the lower mold 1 and the lower surface of the upper mold 2 have corresponding corrugated surfaces. In the stamping using the lower die 1 and the upper die 2 as described above, as shown in FIGS.
As shown in order in (c), the flat material 3
When is plastically deformed into corrugations, each peak and valley will be formed simultaneously. Then, the respective parts of the material 3 are pulled to the ridges of the corrugated surface of the lower mold 1 and the upper mold 2 as shown by the arrows in the drawing, and stick to each other. Therefore, slippage of the material due to slippage is not effective, and each part of the material 3 has to undergo large plastic deformation in a small range. Beyond the limit of size, cracking is likely to occur. In particular, since the material of the material 3 is brought close to the central portion of the material 3, a crack is likely to occur at the end of the material 3.

[0004]

As described above, when a corrugated plate is formed by stamping, the opposing surfaces of the pair of rigid mold bodies may be corrugated surfaces and may be parallel to each other. If the material is hard and thin, or if the valley is deep, there is a problem that cracks are likely to occur.

The present invention is intended to solve such a problem, and even when the material is hard and thin or the valley is deep, the corrugated plate does not cause damage such as cracks. It is an object of the present invention to provide a corrugated plate press working method and a press working apparatus for forming corrugated plates.

[0006]

In order to achieve the above object, the invention of claim 1 is a corrugated plate pressing method for forming a plate-shaped material into a corrugated plate by stamping with a mold body that opens and closes each other. That is, the plurality of peaks of the corrugated plate are sequentially formed in the order in which they are arranged.

In order to achieve the above-mentioned object, the invention of claim 2 is a corrugated plate press working apparatus for forming a plate-shaped material into a corrugated plate by stamping by a pair of molds which are opened and closed with each other. Is a rigid body and has a corrugated surface on the surface facing the other mold body, and the other mold body is an elastic body having an elastic mold facing the corrugated surface of the one mold body. However, the surface of the elastic mold facing the corrugated surface of the one mold body is inclined with respect to the corrugated surface in the direction of corrugation.

In the corrugated plate pressing method according to the first aspect of the present invention, when a plate-shaped material is formed into a corrugated plate by stamping with a mold body that opens and closes each other, a plurality of peaks of the corrugated plate are arranged in order. By sequentially forming, the tensile stress generated in the material at one time during molding is reduced, and the deviation of the material due to plastic deformation is smoothly generated, so that the material is prevented from being damaged such as cracks.

In the corrugated plate press working apparatus according to the second aspect of the present invention, the plate-shaped material is formed into the corrugated plate by closing the pair of molds with the material sandwiched therebetween. In the elastic mold of the body, since the surface facing the corrugated surface of one mold body is inclined, the material is sequentially sandwiched between the corrugated surface of one mold body made of a rigid body while elastically deforming. ,
Moreover, since the direction of the inclination is the direction in which the corrugations are arranged, the peaks are sequentially formed one by one on the material.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a press working apparatus according to the present invention will be described below with reference to FIGS. In FIG. 1A, 11 is a flat plate-shaped material.
The material of this material is aluminum, and the plate thickness t is 0.3 mm. FIG. 2 shows a corrugated plate 12 formed from the material 11. The corrugated plate 12 has a flat plate portion 12a at the center and a plurality of linear peaks and valleys on both sides thereof. There are corrugated portions 12b arranged parallel to each other. The height h from the valley to the peak of the corrugated portion 12b is 1.5 mm.

Next, the structure of a press working apparatus for forming the corrugated plate 12 by stamping will be described. 16 is a lower mold which is one mold, 17 is an upper mold which is the other mold,
The upper die 17 moves up and down to open and close with respect to the lower die 16. The lower mold 16 is made of a rigid metal. A horizontal plane 16a for forming the flat plate portion 12a of the corrugated plate 12 is formed on the upper surface of the lower mold 16 facing the upper mold 17, and both corrugations of the corrugated plate 12 are formed on both sides of the horizontal plane 16a. A corrugated surface 16b forming the portion 12b is formed. These corrugated surfaces 16b are each inclined in a direction that descends outward from the horizontal portion 16a.
The inclination direction matches the direction in which the waveforms are arranged on the corrugated surface 16b. The inclination angle θ of the corrugated surface 16b with respect to the horizontal plane should be set so that at least the undercut shape does not occur in the corrugated surface 16b, but it is preferably about 15 to 34 °, and the most preferable value in this embodiment is 30. ° is adopted.

On the other hand, the upper mold 17 is a horizontal surface of the lower mold 16.
It has a holding plate 18 that moves up and down to sandwich the portion of the material 11 that becomes the flat plate portion 12a between the holding plate 18 and 16a.
It has elastic molds 19 located on both sides of 18. This elastic type
Reference numeral 19 is made of an elastic body such as hard urethane having high flexibility, but is held from the outside by a holder 20 made of a rigid body and moves up and down independently of the holding plate 18. In addition, the lower surface 19a of the elastic die 19 which sandwiches the portion to be the corrugated portion 12b of the material 11 between the lower die 16 and the corrugated surface 16b.
Is horizontal in the natural state. That is,
The lower surface 19a of the elastic die 19 that forms the corrugated portion 12b is inclined at an angle θ with respect to the corrugated surface 16b of the lower die 16.

Next, a press working method using the press working apparatus will be described. When stamping, lower mold
16 and the upper mold 17 are open, the lower mold 16 and the upper mold 17
After the flat material 11 is fed horizontally between the 17
Descends and closes to the lower mold 16. First, FIG.
As shown in, the central part that becomes the flat plate part 12a of the material 11 is the lower mold.
The material 11 is sandwiched between the horizontal surface 16a of 16 and the holding plate 18 of the upper mold 17, and the material 11 is firmly fixed.

Next, the elastic die in which the upper die 17 continues to descend.
The initially horizontal lower surface 19a of 19 contacts the horizontal upper surface of the material 11, but then continues to descend.
The material 19 pushes down both sides of the material 11 while sliding on the upper surface of the material 11. And finally, the elastic type
19 elastically deforms itself, sandwiches the material 11 between the corrugated surface 16b of the lower die 16 made of a rigid body, and plastically deforms the material 11 to form the corrugated portion 12b in the shape of the corrugated surface 16b.
At that time, the lower surface 19a of the elastic die 19 forms a horizontal surface in a natural state, while the corrugated surface 16b of the lower die 16 is inclined with respect to the horizontal surface. The material 11 is sequentially sandwiched between 16b and the outside from the center side. And, since the direction of the inclination is the direction in which the waveforms are arranged,
The mountains are sequentially formed on the material 11 one by one.
Note that FIG. 1B shows a stage in which the corrugated portion 12b is formed on the material 11 halfway, and FIG. 1C shows a stage in which the corrugated portion 12b is entirely molded in the material 11.

After the formation of the corrugated portion 12b is completed, the upper die 17 is lifted and opened from the lower die 16. Here, after the material 11 (corrugated plate 12) after molding is sent out between the lower mold 16 and the upper mold 17,
The next material 11 is fed between the lower mold 16 and the upper mold 17, and the above molding is repeated.

After the corrugated portion 12b is formed by sandwiching the corrugated surface 16b of the lower die 16 and the elastic die 19 of the upper die 17, the corrugated plate 12 has the corrugated portion 12b inclined with respect to the flat plate portion 12a. Since it is in the state, it is necessary to bend and bend the corrugated portion 12b with respect to the flat plate portion 12a. This is the presser plate when the mold is opened.
Before raising 18, the corrugated portion 12b may be pushed up by a stripper (not shown) provided on the lower die 16 side, or a post-process may be added after the main press working.

According to the configuration of the above-described embodiment, the peaks of the corrugated portion 12b are sequentially molded one by one in the material 11, so that at the time of molding, as compared with the case where the entire corrugated portion 12b is molded at the same time, The tensile stress generated in 11 is reduced and the material 11
It is possible to prevent damage such as cracks from occurring. Moreover, since the corrugated portion 12b is formed sequentially from the central portion side of the material 11 to the outside, as the plastic deformation of the material 11 progresses,
Since the material is smoothly drawn from the outer side which is the free end side of the material 11, the tensile stress can be further reduced and the material 11 can be more reliably prevented from being damaged such as cracks. In this way, when the material 11 is hard and thin,
Even if the valley to be formed is deep, the corrugated plate 12 can be formed by stamping without causing damage such as cracks.

Moreover, the press working apparatus is such that the material between the lower die 16 made of a rigid body having the corrugated surface 16b and the corrugated surface 16b.
Since the lower surface 19a of the elastic mold 19 forms a horizontal surface in a natural state, the corrugated surface 16b is inclined with respect to the horizontal surface,
A plurality of peaks of the corrugated plate 12 can be sequentially formed by simply lowering the upper mold 17 and closing it with respect to the lower mold 16. That is, the structure of the press working apparatus is simple and the cost can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIG. The structure of the second embodiment is common to the structure of the first embodiment except for the points described below. And a lower mold different from the first embodiment
Corresponding parts other than the corrugated surface 16c of 16 and the lower surface 19b of the elastic die 19 are designated by the same reference numerals. In the press working apparatus according to the second embodiment, the corrugated surface 16c on the upper surface of the lower die 16 is horizontal and positioned on the same plane as the horizontal plane 16a. On the contrary,
A lower surface 19b of the elastic die 19 of the upper die 17 is an inclined surface which is in a natural state and is inclined in a direction of going upward from the holding plate 18 side. The direction of the inclination is the same as the direction of the arrangement of the waveforms on the corrugated surface 16c. Elastic type like this
Since the lower surface 19b of 19 is inclined at an angle θ1 with respect to the horizontal plane, it is also inclined with respect to the horizontal corrugated surface 16c of the lower die 16. The inclination angle θ1 of the lower surface 19b of the elastic die 19 is 10
Approximately 25 ° is preferable, and 15 ° is adopted as the most preferable value in this embodiment.

In the press working method using the above press working apparatus, first, as shown in FIG. 3A, the central portion of the material 11 is between the horizontal surface 16a of the lower mold 16 and the holding plate 18 of the upper mold 17. After being sandwiched between, the initially inclined lower surface 19b of the elastic die 19 that continues to descend is in contact with the upper surface of the material 11 from the center side to the outer side. At that time, the elastic die 19 elastically deforms by itself, and while the material 11 is rigid, the corrugated surface 16c of the lower die 16 is formed.
It is sandwiched between and and plastically deformed,
A corrugated portion 12b having a shape of 16c is formed. Due to the inclination of the lower surface 19b of the elastic mold 19, this molding is sequentially performed from the central portion side of the material 11 to the outside. Since the direction of the inclination is the direction in which the corrugations are arranged, the material 11 is sequentially formed with one mountain. Note that FIG. 3 (b)
3C shows the stage where the corrugated portion 12b has been molded halfway on the material 11, and FIG. 3C shows the stage where the corrugated portion 12b has been entirely molded on the material 11.

Also, according to the configuration of the second embodiment,
The same effect as the first embodiment can be obtained. In addition to this, in the second embodiment, since the formation of the corrugated portion 12b is completed with the entire material 11 being flat, this corrugated portion 12b is formed after the corrugated portion 12b is formed as in the first embodiment. Flat part 12a
No need to bend against.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made. For example,
The corrugated plate 12 of the above embodiment has a flat portion 12a at the center,
Although the corrugated portions 12b are provided on both sides of the corrugated plate, the present invention can be applied to the formation of a corrugated plate which is entirely corrugated, a corrugated plate having a flat portion on the side part, or another corrugated plate. When forming a corrugated plate that is entirely corrugated, for example, in the press working apparatus of the first or second embodiment, the horizontal surface 16a of the upper surface of the lower mold 16 is replaced with a corrugated surface, and the upper mold 17 is used.
The lower surface of the holding plate 18 may have a corresponding corrugated surface. If only a small number of ridges are formed, the lower die 16 and the pressing plate 18 made of a rigid body will not crack the material 11.

Further, in the above embodiment, the corrugated surface 16 of the lower mold 16 is used.
b has an inverted V-shaped cross section or the lower surface 19 of the elastic mold 19 of the upper mold 17.
By making b a V-shaped cross section, the corrugated surfaces 16b, 16 of the lower mold 16
The inclinations of the lower surfaces 19a and 19b of the elastic die 19 of the upper die 17 with respect to c were made opposite to each other on both sides. Good. In this case, at the time of press working, for example, with one side part of the material being pressed, the corrugated part may be sequentially formed from the one side part to the other side part.

Further, the material, the thickness t, the height h of the crests of the corrugated plate, etc. are not limited to those in the above-mentioned embodiment, but various ones are possible. However, the present invention is particularly effective when the material is hard and thin or when the valley is deep.

[0025]

According to the corrugated plate press working method of the first aspect of the present invention, when a plate-shaped material is formed into a corrugated plate by stamping, a plurality of peaks of the corrugated plate are sequentially formed in a lined order. Therefore, even if the material is hard and thin or the valley is deep, the corrugated plate can be formed by stamping without causing damage such as cracks.

According to the corrugated plate press working apparatus of the second aspect of the present invention, one of the pair of die bodies for stamping is made of a rigid body, and the surface is opposite to the other die body. Has a corrugated surface, the other mold body is made of an elastic body and has an elastic die that faces the corrugated surface of one die body, and the surface of the elastic die that faces the corrugated surface is Because it is inclined in the direction of the corrugations, as both molds are closed,
Since a plurality of peaks of the corrugated plate can be successively formed, the effect of the invention of claim 1 can be obtained, the structure of the device can be simplified, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a corrugated plate press working apparatus showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a corrugated plate formed by the same as above.

FIG. 3 is a sectional view of a corrugated plate press working apparatus showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an example of what can be considered as a corrugated plate press working apparatus.

[Explanation of symbols]

 11 material 12 corrugated plate 16 lower mold (one mold body) 16b corrugated surface 16c corrugated surface 17 upper mold (other mold body) 19 elastic type 19a lower surface of elastic type (face facing the corrugated surface) 19b lower surface of elastic type (Face facing the corrugated surface)

Claims (2)

[Claims] 1. A corrugated plate pressing method for forming a plate-shaped material into a corrugated plate by stamping with a mold body that opens and closes with each other, wherein a plurality of peaks of the corrugated plate are sequentially formed in order. A method for pressing a corrugated plate characterized by. 2. A corrugated plate press working apparatus for forming a plate-shaped material into a corrugated plate by stamping with a pair of mold bodies that open and close with each other, wherein one mold body is a rigid body and the other mold body is formed. The corrugated surface is provided on the surface facing the body, and the other mold body has an elastic die opposed to the corrugated surface of the one die body, and the corrugated surface of the one die body in the elastic die. The corrugated plate press working apparatus is characterized in that the surface facing the surface is inclined with respect to the corrugated surface in the direction in which the corrugations are arranged.