JPS6313619A - Bending method for resin laminated metal plate - Google Patents

Abstract

PURPOSE:To obtain the product in the necessary shape simply and surely by pressing the bending part of a resin laminated metal plate in the plate thickness direction and performing the bending by removing the resin of the part thereof to restrain the shear deformation of the resin layer. CONSTITUTION:The pressurizing plate 4 energized in the punch 6 direction by a spring or hydraulic cylinder, etc. is provided on a bending die 5. When the punch 6 is descended by setting a resin laminated metal plate 7 on this bending die 5, the plate 7 is subjected to a V type bending by being pinched and pressed with the punch 6 and pressing plate 4 at its bending part and the bending is completed at one stage. In this case, the resin laminated metal plate 7 is removed to the periphery with the deformation by the pressurizing at its resin layer of the part thereof prior to the bending and in succession the bending deformation of the laminated plate and the removal of the resin layer in the bending part are progressed. The shear deformation of the resin layer is therefore not caused, so the bending product of a proper shape can be obtd. stably and easily.

Description

[Detailed Description of the Invention] <Field of Application in Industry 1> This invention is a method for bonding and sandwiching a synthetic resin layer between metal plates.
This article relates to a method for bending a resin-laminated metal plate made of ζ-laminated sheets.

In recent years, in order to improve the soundproofing, vibration-proofing, or heat-insulating properties of the metal plate part +A and to reduce the cost, a synthetic resin layer has been sandwiched between metal plates made of iron, alumina 1, copper, or alloys thereof. Demand for bonded resin laminated metal sheets is rapidly increasing.

By the way, when manufacturing metal plate products, usually "9"
Bending processes such as "0° V bending process" are essential, and the quality of the bending process often determines the value of the product. The same applies when manufacturing products.
The resin laminated metal plate had the extremely inconvenient problem that ``if it is bent in the same way as a single metal plate, a product with a satisfactory shape cannot be obtained.''

That is, for example, when bending a single metal plate 1 using a bending die 2 and a punch 3 as shown in FIG.
As shown in the figure, although the well-known spring hack phenomenon is observed (in Figure 5, the broken line represents the shape when forming load is applied, and the solid line represents the shape after removing several layers), the product with the desired shape is comparatively Although it can be easily obtained, when a resin laminated metal plate like the one described above is subjected to normal press bending, in addition to the spring bank, the flange part bends as shown in Figure 6, resulting in the desired shape. of products could not be titrated.

<Conventional technique ihof and its problems> For this reason, (jf-Last, when performing press bending on a resin laminated metal plate, 1.1lll following the bending process using a conventional mold, pre-7) 31. Correction of bent parts (
Perhaps a two-step process was used (one decisive push at the bottom dead center), and even then complete correction could not be expected.
Increased man-hours, 1, 1, 1, 1, 2, 1,000 yen of labor! II
＋It was difficult to do anything.

On the other hand, resin lamination? / In order to perfect the bending process of the metal plate, (a) The thickness of the surface metal plate (hereinafter referred to as 1-1 metal folding, 2-haku, 4-ru) constituting the resin laminated metal plate on the front and back sides. If you change it, jp6 (H5 light force) 3,1 bending process with the steel plate on the outside! Ex-husband r1. 'i Kaisho 1st place
-72724] +b+ -): Meresin f+'i layer 3
Form a groove at or around the bent part of the genus fJj.
＼、The lR1 absorbs the strain that occurs when bending and applying pressure.
Then, the mutual positions of the metal plates are fixed (bending process I).
・How to do it ('IM Kaisho 6O-114215] td+
A method has been proposed in which the outer spindle metal plate of resin laminated metal (resin laminated metal) 1i is stretched and bent using a die with protrusions (Japanese Patent Application Laid-open No. 60-231525), but it still requires a complicated process. It was unavoidable that the surface of the product would be damaged.

<Means for Solving the Problems> From the above-mentioned viewpoint, the present inventors have devised a method that is as simple, easy and We need to find a method for bending resin-laminated metal plates that can be carried out smoothly. (First, going back to basics, JJII conducted a basic test δ4 on the bending phenomenon of the flange that occurs when bending resin-laminated metal plates. +'+ii The bending phenomenon is not observed at all in metal-to-metal laminates, such as clad steel sheets, even if they are made of the same composite material, and is not observed in interlayers with completely different strengths, such as the resin-laminated metal sheets described earlier. It was found that this is a phenomenon peculiar to laminated materials with a laminate material having a laminate, and that the cause is the shear deformation that occurs in the intermediate layer.

That is, when the metal plate 4A is bent to its side surface, the 3A+I line remains straight even after bending and is reduced to 1L. 1, ・) radial cotton-like shape, whereas a resin laminated metal plate with 1 layer in the middle has a radial cotton-like shape, and bending process is difficult even if scored lines are inserted as shown in Figure 8 (・]). When you finish each 611n trith) (Fig.
It will bend like BL. It is clear from the actual LIT that when bending a resin-laminated metal plate, shear deformation occurs in the intermediate resin layer, but this is because the strength of the metal and resin is extremely low. It's the second thing that happens to me,
Due to this shearing deformation, different (opposite) forces act on the bent portion of the resin layer on the inside and outside, as shown in FIG. On the other hand, since there is no shear deformation η in the part of the resin layer away from the bending part, the force acting on the bending part must be canceled somewhere.This result is Resin 4Il at a point a little far from the bending part
This appears as a bend in the i-layer metal plate.

Note that if two metal plates are simply overlapped and then bent, the bending phenomenon will not occur, although deviations will occur at the ends, as shown in FIG.

This also shows that the bending phenomenon of the resin laminated metal plate is caused by shear deformation due to the presence of the resin layer.

Therefore, based on these facts, the inventors of the present invention
As a result of further research based on the recognition that it is essential to suppress shear deformation of the resin layer in order to achieve favorable bending of resin laminated metal plates without causing unwanted shape deformation. ,[-When bending a resin laminated metal plate, press the bent part before bending to remove the resin layer located at the bent part to the surrounding area, or perform the bending process. If the bending process is performed while applying pressure to the bent part and removing the resin layer around the bent part, shear deformation of the resin layer will be suppressed, and the desired product can be easily manufactured without causing unwanted shape deformation. We were able to obtain the knowledge that "we can definitely obtain this."

This invention is based on the first finding! 1. When bending a resin laminate with a resin layer sandwiched between metal plates, pressurize the bent part of the laminate in the thickness direction to release the resin in that part. By eliminating and bending, you can avoid unintended deformation and surface 1+il: bending products without a shade.
-It is characterized by being manufactured reliably and with high quality.
).

In addition, here, ``pressure is applied to the bent part of the laminate in the board thickness direction to remove the resin in that part. Needless to say, when performing bending I-, the pressure is applied to 1111 of the bending process. -Taste 4- It is a taste.Furthermore, it goes without saying that the 111 removal situation of the tree JIH at this time does not necessarily lead to completely eliminating all 4 of the resin located at the bending part.

The pressurization of the resin laminated metal plate to perform IJI removal of the resin layer at the bent portion is preferably carried out while the portion is heated (heating temperature may be about 100° C. or lower).

This is because heating reduces the deformation resistance of the resin, making it easier to expel the resin to the surrounding area, which is extremely advantageous in reducing pressurizing force and ensuring stable work.

Now, FIG. 1 is a schematic diagram showing an example of the implementation state of the method according to the present invention.
This can be carried out extremely easily by using a bending die consisting of a punch 6 and a punch 6. This pressure plate 4 is attached to the bending die 5 by being urged in the direction of the punch 6 by a spring or a hydraulic cylinder, etc., and the resin laminated metal plate 7 is set on the bending die 5 and the punch 6 is lowered. Then, the resin laminated metal plate 7 is formed as shown in FIG. 1 fbl while the bent portion is held and pressed by the punch 6 and the pressure plate 4, and the bending process is completed in step 1. At this time, the bent part of the resin-laminated metal plate 7 is first pressed in the direction of the plate by the punch 6 and the pressure plate 4, so that the resin layer at that part is deformed and removed to the surroundings before bending, and then The bending deformation of the laminate and the further removal of the resin layer at the bent portion progresses. At this time, the bending deformation state of the resin layer becomes as shown in FIG. 2, C31, and shear deformation, which is the cause of the bending phenomenon, does not occur, so that a bent product with an appropriate shape can be stably and easily obtained.

At this time, as shown in FIG.
It is easier to remove the resin layer by inserting a heater 8.8' into it to heat the bent part of the resin layer.
At i1, bending l° can be carried out smoothly. In this case, the heater may be attached to either the punch or the pressure plate, or the bent portion of the resin layer may be heated by other means.

Of course, as described in 1) above, pressurize the bent part of the resin laminated metal plate with Bon-f-'+'7 at room temperature or under heating to remove the resin layer by IJI, and then It goes without saying that the bending process can be performed using a general bending die (1) without a pressure plate as described above, and a good result can be obtained.

In addition, there is no particular restriction on the resin layer metal plate to which the method of the present invention is applied. , a laminated skin metal plate such as an aluminum or aluminum alloy plate, or the like.

Next, the present invention will be specifically explained with reference to Examples.

<Example> Example 1 A normal V-bending mold and a ■-bending mold with a pressure plate shown in FIG.
A laminate having an intermediate layer (polypropylene) having a thickness of 0.32 mm was bent by 906 mm at a bending radius of 0.2 mTA.

As a result, when using the normal ■ bending die, the bending angle of the flange was 10 to 15 degrees, whereas
According to the method of the present invention, in which the bending part is bent while applying pressure in the thickness direction of 20 gf/mm2 with a V-bending die equipped with a pressure plate, the bending angle becomes 10 or less, and the bending phenomenon is sufficiently suppressed. I was able to do that.

In addition to the same conditions as in the present invention, the bending part was
When heated to 0° C. and subjected to 'C bending, it was also confirmed that the bent portions were completely eliminated.

Example 2 By using a normal V-bending type and a 7-bending type with a pressure plate shown in Fig. 1, the thickness of the skin steel plate was 0.35 mm and 0.1 mm.
At 9 m-, the thickness of the resin (polypropylene) intermediate layer is 0.
A 0.35mm 1V skin steel plate becomes the outer side of the 22cm thick laminate. 1゛ Sea urchin 6 bending radius 0.2 dragon 90
゜V-bending.

As a result, when a normal V-bending die was used, the JJr bending angle of the flange part was 17 to 23 degrees, whereas with the V-bending die of 1"E plate A/1, the bending angle was 20 kgf.
According to the method of the present invention, in which the sheet was bent while applying pressure in the thickness direction of /mm2, the measured bending angle was 1 degree or less, and the bending phenomenon could be reduced to one per minute.

In addition, in addition to the same strip A'1 as in the present invention described in Section 12, when the bent portion was further heated to 70° C. and bent, it was confirmed that the bent portion was completely eliminated.

<Effects of the Invention> As explained above, according to the present invention, the bending phenomenon that occurs during bending of resin laminated metal plates can be easily and easily prevented, and its application has been avoided due to the above bending phenomenon. This makes it possible to fully use resin-laminated metal plates in various applications such as the above, and brings about extremely useful industrial effects such as improved performance and cost reduction of various facilities and equipment.

[Brief explanation of the drawing]

FIG. 1 shows a method of bending a resin laminated metal plate according to the present invention.
FIG. 1 is a schematic diagram showing an example;
Fig. 1 shows the state of i, and Fig. 1 fbl shows the state after processing. Fig. 2 shows the resin layer at the bent part when the resin laminated metal plate is bent by the method according to the present invention. FIG. 3 is a schematic diagram showing an example of the method of heating the bent portion when carrying out the method of the present invention. FIG.
ll A schematic diagram showing the bending method using the regular V-bend 3i Q'7. Figure 5 is a schematic diagram showing the springback phenomenon using seven bends of a metal plate. (1゛Schematic diagram showing the bending phenomenon after bending, which is a problem with one-layer gold one-board plates. Figure 7 is an explanatory diagram showing the deformation state of the metal core plate during V-bending. (nl shows the state before bending, Figure 7 shows the state after 4:1 bending force is transferred, and Figure 8 shows the state of V-bending of the resin laminated metal plate [deformation due to time]. Figure 8 (Al shows the state before bending, Figure (11) shows the state after bending, Figure 9 shows resin laminated metal +) V bending of M. O&J during processing
FIG. 1θ is an explanatory diagram showing the deformation behavior of the resin layer, and FIG. There is A9 in the drawing, 1! (■... Single metal plate, 2, 5... Bending die, 3.
6... Punch, 4... Pressure plate, 7... Resin laminated metal plate, 8, 8'... Heater.

Claims (2)

[Claims] (1) When bending a resin laminate in which a resin layer is sandwiched between metal plates, the bending part of the laminate is pressurized in the thickness direction to exclude the resin in the part, and the bending process is performed. A method for bending resin laminated metal plates. (2) Applying pressure to the bent portion while the portion is heated;
A method for bending a resin laminated metal plate according to claim 1.