JPS6014099B2 - Transfer - manufacturing method of aluminum alloy plate for mold processing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an aluminum alloy plate for transfer mold processing.

Conventionally, for example, when manufacturing drawn products such as capacitor caps from aluminum alloy, so-called transfer processing, in which aluminum alloy sheets are sequentially and continuously formed using a die press, has been commonly used. During transfer processing, there was a problem in that the skeleton remaining on the original plate material after press processing was cut or curved, and the transfer processing did not proceed smoothly.

For example, FIGS. 1A, 1B, and 1C are schematic explanatory diagrams illustrating transfer processing of an aluminum alloy plate 1 that is generally performed.

Therefore, the plate thickness, plate thickness after drawing, etc. are not accurately shown. That is, while transporting the aluminum alloy plate 1 in the direction of the arrow, deep drawing 2 (only 5 pieces are shown in the figure) is carried out regularly and continuously in a staggered manner at 1. It is something.

), and then cutting 3 is performed at location B to punch out the product P. In this case, by performing the drawing process, the blank punched by the transfer die during the drawing process is connected to the remaining part (skeleton) at a connection point in the direction of 45 degrees with respect to the transfer direction (arrow). .

Then, during processing or transfer, this connection 4 is broken or bent, and the transfer processing does not proceed smoothly. The present invention is a method for manufacturing an aluminum alloy plate suitable for processing using a transfer die as described above, in which a punched blank formed by transfer die processing is cut or curved due to the skeletal skeleton remaining on the original plate material after pressing. In other words, the punched blank created by transfer mold processing is connected to the remaining part (skeleton) at a 45 degree angle to the transfer direction, but the remaining part (skeleton) is cut in the direction of connection so that it can easily stretch. This is a method of manufacturing an aluminum alloy plate that generates edges on the plate.

More specifically, in the transfer processing in which the remaining parts (skeleton) are connected at 45 degrees to the transfer direction, the remaining parts (skeleton) are manufactured by manufacturing a plate having ears in the direction in which the remaining parts (skeleton) are connected at 45 degrees to the transfer direction.
To provide a method for manufacturing an aluminum alloy plate for transfer mold processing, in which the connecting portion with the skeleton (skeleton) is easily stretched during transfer mold processing, and skeleton breakage does not occur.

The characteristics of the method for manufacturing an aluminum alloy plate for transfer mold processing according to the present invention are as follows. 05～
0.25%, Feo. 3-0.7%, Cuo. 01~0
．． 2% and the ratio of Fe and Si (Fe/Si)
After melting and casting an aluminum alloy consisting of the balance A and impurities with a ratio of 3.5 or more, a soaking treatment is performed, and then 20
Finish hot rolling is carried out at a temperature of 0.00 to 310.0 to 0.000 to make the plate thickness 2.5 or more. Next, finish cold rolling is carried out to make the plate thickness 0.2 to 0.5. The purpose is to do the following.

Next, a method for manufacturing an aluminum alloy for transfer mold processing according to the present invention (hereinafter sometimes referred to as a manufacturing method according to the present invention).

) will be explained in detail. First, the components and component ratios of the aluminum alloy plate used in the manufacturing method according to the present invention will be explained.

Si is an element that prevents the formation of squeeze ears in aluminum alloy mold processing, and Fe (described later) forms ears in the 45-degree direction, but S; conversely forms ears in the 0-degree and 90-degree directions. They cancel each other out, and the content is 0.
If the content is less than 0.05%, this effect will not be obtained, and if the content exceeds 0.25%, the formation of ears in the 0 degree and 90 degree directions will become significant, and the toughness will be impaired and the drawability will be reduced.

Therefore, the Si content is set to 0.05 to 0.25%. F
e is an element that refines the recrystallized grains and increases the strength of the material by strengthening its hardness and improves the drawability.
．． A content of 3% does not have this effect, and a content of more than 0.7% forms coarse compounds that impair toughness and reduce drawability.

Therefore, the Fe content is set to 0.3 to 0.7%. Also,
As mentioned above, Si and Fe have a great influence on the formation of ears in mold processing of aluminum alloys, so the content of Sj and Fe as well as the ratio of Sj and Fe In other words, in processing where the punched plank with a transfer die is connected to the remaining part (skeleton) at 45 degrees to the transfer direction, the Fe/Si ratio during drawing is It has a big impact on the listening rate, and it is
Since it is sufficient to extend the portions connected in the 5-degree direction, the Fe/Si ratio may be increased, and in the end, the effect will be greater if the Fe/Si ratio is 3.5 or more. As is clear from this explanation, Sio.
05-0.25%, Feo. 3 to 0.7%, and
By setting the Fe/Si ratio to 3.5% or more,
In order to make it easier for the punched blank formed by transfer mold processing to stretch the part where it connects with the rest (skeleton) at 45 degrees to the transfer direction, we attached an aluminum alloy plate edge in the direction of the connection and at a 45 degree angle. can be made to occur.

Cu is an element that increases the strength of the material and improves the drawability without deteriorating the corrosion resistance, and the content is 0.01.
If the content is less than 0.2%, this effect will be small, and if the content exceeds 0.2%, the insect resistance will be significantly deteriorated.

Therefore, the Cu content is set to 0.01 to 0.2%. In addition, even if Mn, Mg, Zn, Ti, etc. are contained as impurities to the extent that they are normally included in aluminum alloys, they do not affect the manufacturing method according to the present invention. Next, processing conditions of the manufacturing method according to the present invention will be explained.

That is, an aluminum alloy that fully satisfies each of the above conditions is melted and cast using the usual method, soaked, and finished hot rolled at a temperature of 2000 to 310q0 to reduce the plate thickness to 2.5 cm. However, in processing where the blank punched by the transfer die is connected to the remaining part (skeleton) at 45 degrees to the transfer direction, if the hot rolling finishing temperature is less than 200 oo, water lacquer will be applied during hot rolling. Corrosion occurs due to the entrainment of oil,
A product of satisfactory quality cannot be obtained, and if the temperature exceeds 310 qo, edges in the 0 degree and 90 degree directions become more likely to occur during drawing.

Furthermore, if the finished hot-rolled plate thickness is less than 2.5 Yanagi, selvage in the 0 degree and 90 degree directions will be more likely to occur during drawing. Therefore, the hot rolling finishing temperature is 2000 to 31000, and the hot rolling finishing plate thickness needs to be 2.5 ribs or more. Next, after finishing this finishing hot rolling, finish rolling is performed to reduce the plate thickness to 0.
Recrystallized sintered anchor is further performed as 2 to 0.5 legs,
The reason why the thickness of the plate in the finishing cross-rolling is 0.2 to 0.5 skin is because the thickness of ordinary products falls within this range, and the purpose of the present invention cannot be achieved with plate thicknesses other than this range.

Furthermore, recrystallized phosphorous dulling generally has a temperature of 3500 to 360
It is common to carry out the process at qo for 2 to 3 hours, but the conditions for recrystallization phosphorus annealing are not particularly set because the material only needs to be recrystallized. According to the manufacturing method according to the present invention, when processing an aluminum alloy plate with a transfer die so that the punched blank formed by transfer die processing is connected to the remaining part (skeleton) at 45 degrees with respect to the transfer direction, The purpose is to prevent the parts connected at 45 degrees from being cut or bent during processing or transportation, and to make it easier to stretch the parts connected at 45 degrees, the plate material is moved in the direction in which they are connected. It generates ears, and the Si content is 0.05 to 0.25%,
Fe content is 0.3~07%, and Si and Fe are F
The e/Si ratio is 3.5 or more, and further hot rolling,
The above objective can be achieved by cold rolling.

Next, an example of the method for manufacturing an aluminum alloy plate for transfer mold processing according to the present invention will be described.

Note that although there are two parts connected at 45 degrees in FIG. 1, there may be four parts connected depending on the punching method. Example Sio. 12%, Feo. 49%, (Fe/Si=4.
1), Cuo. 13%, Mno. 005%, Mg0.0
10%, Zno. 006%, Tio. 021%, A〆9
After melting and casting an aluminum alloy consisting of 6.22% (W%) by a normal method, soaking treatment, hot rolling to a thickness of 3.5 mm at a hot rolling finishing temperature of 307o0, followed by finishing cold rolling. The plate thickness was reduced to 0.35 by rolling, and then 360q
A recrystallization dawn anchor for 3 hours was performed.

The aluminum alloy plate manufactured in this way was 45
It had selvedges in the degree direction, and the selvage ratio was 15.2% (squeezing ratio 50%, wrinkle presser 50k9/rib 2).

When this plate was subjected to transfer processing, ears were generated in a direction connected at 45 degrees to the transfer direction, and the transfer processing could be carried out smoothly.

[Brief explanation of drawings]

FIGS. 1a, b, and c are schematic explanatory diagrams for explaining transfer mold processing. 1...Plate, 2...Drawing, 3...
・Cutting, 4... 45 degree direction connection part, P...
···product.

Claims (1)

[Claims] 1 Si0.05-0.25%, Fe0.3-0.7%
After melting and casting an aluminum alloy containing 0.01 to 0.2% of Cu and having a ratio of Fe to Si (Fe/Si) of 3.5 or more with the balance being Al and impurities, soaking treatment is performed. , finish hot rolling at a temperature of 200° to 310°C to a plate thickness of 2.5 mm or more, then final cold rolling to a plate thickness of 0.2 to 0.5 mm, and further recrystallization annealing. A method for manufacturing an aluminum alloy plate for transfer mold processing, characterized by: