JPH04174000A - Production of aluminum alloy parts for automobile body - Google Patents
Production of aluminum alloy parts for automobile bodyInfo
- Publication number
- JPH04174000A JPH04174000A JP2297843A JP29784390A JPH04174000A JP H04174000 A JPH04174000 A JP H04174000A JP 2297843 A JP2297843 A JP 2297843A JP 29784390 A JP29784390 A JP 29784390A JP H04174000 A JPH04174000 A JP H04174000A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- deep drawing
- parts
- surface roughness
- alloy sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 230000003746 surface roughness Effects 0.000 claims abstract description 18
- 238000004070 electrodeposition Methods 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 239000000956 alloy Substances 0.000 abstract description 5
- 238000010422 painting Methods 0.000 abstract 3
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000003973 paint Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
Ａ０発明の目的
（１）産業上の利用分野
本発明は自動車車体用アルミニウム合金製部品の製造方
法、特に、潤滑剤を塗布されたアルミニウム合金板に深
絞り加工を施して部品素材を成形する工程と、前記部品
素材に電着塗装を施す工程とを順次行う製造方法の改良
に関する。DETAILED DESCRIPTION OF THE INVENTION A0 Object of the Invention (1) Industrial Field of Application The present invention relates to a method for manufacturing aluminum alloy parts for automobile bodies, in particular a method for producing aluminum alloy parts coated with a lubricant by deep drawing. The present invention relates to an improvement in a manufacturing method in which a step of molding a component material using a metal hydride and a step of applying electrodeposition coating to the component material are performed sequentially.
このように部品素材をアルミニウム合金より構成する理
由は、部品の軽量化を図り、車体重量を軽減することに
ある。The reason why parts are made of aluminum alloy in this way is to reduce the weight of the parts and the weight of the vehicle.
（２）従来の技術
従来、前記部品素材の成形に当っては、深絞り用金型と
の摩擦を低減するために、アルミニウム合金板としては
その画面をそれぞれ光輝面に仕上げたものが用いられて
いる。(2) Conventional technology Conventionally, when forming the above-mentioned component materials, aluminum alloy plates whose screens have been finished with a bright surface are used to reduce friction with the deep drawing die. ing.
（３）発明が解決しようとする課題
アルミニウム合金板は軟鋼板に比べて伸びが小さいため
、深絞り加工に当っては、前記のように潤滑剤を不可欠
とするが、従来法のように、アルミニウム合金板の画面
を光輝面に形成すると、それら画面における潤滑剤保持
性が悪（なるため、１回の深絞り加工により部品素材を
得ようとしてもその素材に亀裂が発生するため無理であ
る。(3) Problems to be Solved by the Invention Aluminum alloy plates have a lower elongation than mild steel plates, so a lubricant is essential as described above during deep drawing, but unlike conventional methods, If the screen of an aluminum alloy plate is formed on a bright surface, the lubricant retention property of the screen will be poor (so even if you try to obtain a part material by one deep drawing process, it will be impossible because cracks will occur in the material) .
そこで、従来法においては、深絞り工程を第５図（ａ）
〜（Ｃ）に示すように３段階に分け、同図（ａ）段階で
は最も浅い絞り深さｄ、を有する第１中間体５１を得、
同図（ｂ）段階では中間の絞り深さａｔ （ａｚ＞ｄ
＋）を有する第２中間体５ｔを得、同図（Ｃ）段階で最
終絞り深さｄ３ （（１＋ ＞ｄｚ ）を有する部品素
材５を得ている。Therefore, in the conventional method, the deep drawing process is performed as shown in Fig. 5(a).
It is divided into three stages as shown in ~ (C), and in the stage (a) of the figure, a first intermediate body 51 having the shallowest drawing depth d is obtained,
At the stage (b) in the figure, the intermediate drawing depth at (az>d
+) was obtained, and at the stage (C) in the figure, a component material 5 having a final drawing depth d3 ((1+ > dz) was obtained.
しかしながら、前記のように深絞り工程を３段階に分け
ていたのでは、部品素材、延いては部品の生産性が悪く
、その生産コストの上昇は避けられない。However, if the deep drawing process is divided into three stages as described above, the productivity of the parts materials and ultimately the parts will be poor, and an increase in production costs will be unavoidable.
一方、電着塗装における塗料の付着性を考慮すると、部
品素材の表面は適当に粗い方が良いが、この点において
も従来のような光輝面は不適当である。On the other hand, considering the adhesion of paint in electrodeposition coating, it is better for the surface of the component material to be appropriately rough, but in this respect too, a conventional shiny surface is inappropriate.
本発明は前記に鑑み、深絞り加工においては潤滑剤保持
性を良好にし、また電着塗装においては塗料の付着性を
向上させると共に塗膜面の平滑化を達成し得るようにし
た前記製造方法を提供することを目的とする。In view of the foregoing, the present invention provides a manufacturing method that improves lubricant retention in deep drawing, improves paint adhesion and smoothes the coating surface in electrodeposition coating. The purpose is to provide
Ｂ０発明の構成
（１）課題を解決するための手段
本発明は、潤滑剤を塗布されたアルミニウム合金板に深
絞り加工を施して部品素材を成形する工程と、前記部品
素材に電着塗装を施す工程とを順次行う自動車車体用ア
ルミニウム合金製部品の製造方法において、前記アルミ
ニウム合金板として、その画面の面粗さＲｍａ ｘが５
μｍ以上、１０μｍ以下のものを用いることを特徴とす
る。B0 Structure of the Invention (1) Means for Solving the Problems The present invention comprises a step of forming a part material by deep drawing an aluminum alloy plate coated with a lubricant, and applying electrodeposition coating to the part material. In the method for manufacturing aluminum alloy parts for automobile bodies, the aluminum alloy plate has a surface roughness Rmax of 5.
It is characterized by using a thickness of not less than μm and not more than 10 μm.
（２）作 用
前記のようにアルミニウム合金板の面粗さＲｍａｘを設
定すると、その合金板における潤滑剤保持性が良好とな
るので、１回の深絞り加工により亀裂の発生の無い高品
質な部品素材が得られる。(2) Effect When the surface roughness Rmax of the aluminum alloy plate is set as described above, the lubricant retention property of the alloy plate becomes good, so a high-quality product without cracking can be obtained by one deep drawing process. Part materials can be obtained.
また電着塗装に当っては、部品素材の面粗さＲｍａｘに
伴い塗料の付着性が向上し、その上塗膜厚との関係から
前記面粗さＲｍａｘであれば、その凹凸粗面が塗膜面に
現われることはな（、その結果塗膜面は平滑化される。In addition, in electrodeposition coating, the adhesion of the paint improves with the surface roughness Rmax of the component material, and in addition, from the relationship with the coating film thickness, if the surface roughness is Rmax, the uneven rough surface will be coated. It does not appear on the film surface (as a result, the coating surface is smoothed).
たりし、前記面粗さＲｍａｘが５μｍ未満では、潤滑剤
保持性が悪くなるため深絞り加工において部品素材に亀
裂が発生し、一方、１０μｍを上回ると、深絞り加工に
おいて金型との接触面積が少くなるため、面圧の上昇に
伴い部品素材に亀裂が発生し易くなり、また電着塗装に
おいて、塗膜面に凹凸粗面が現われるため塗膜面の平滑
化が損われる。However, if the surface roughness Rmax is less than 5 μm, lubricant retention will be poor and cracks will occur in the component material during deep drawing, while if it exceeds 10 μm, the contact area with the mold will be reduced during deep drawing. As a result, cracks are likely to occur in the component material due to an increase in surface pressure, and in electrodeposition coating, unevenness and roughness appear on the coating surface, impairing the smoothness of the coating surface.
（３）実施例
第１図において、アルミニウム合金板１は５１８２合金
より構成され、その厚さは１．６ ｍである。(3) Example In FIG. 1, an aluminum alloy plate 1 is made of 5182 alloy and has a thickness of 1.6 m.
画面２．３０面粗さＲｍａｘは略等しい。The screen 2.30 surface roughness Rmax is approximately equal.
このようなアルミニウム合金板１として、その面粗さＲ
ｍａｘを種々変えたものを用意し、各アルミニウム合金
板１の画面２．３にそれぞれ絞り用潤滑剤（新日鉄社製
、商品名Ｘコート）４を塗布した。As such an aluminum alloy plate 1, its surface roughness R
max was prepared in various ways, and a drawing lubricant (manufactured by Nippon Steel Corporation, trade name: X Coat) 4 was applied to the screens 2 and 3 of each aluminum alloy plate 1, respectively.
各アルミニウム合金板１を５００を油圧プレスの金型に
設置し、その合金板１に１回の深絞り加工を施して第２
図に示す部品素材５を得た。この部品素材５は、自動車
車体用部品としてのフロントピラー構成部品に用いられ
るもので、絞り深さｄ、が１００＋ａａのカップ形本体
６と、その開口部に連設されたフランジ部７とを有する
。500 pieces of each aluminum alloy plate 1 are placed in the mold of a hydraulic press, the alloy plate 1 is deep drawn once, and then the second
A component material 5 shown in the figure was obtained. This part material 5 is used for a front pillar component as an automobile body part, and has a cup-shaped main body 6 with a drawing depth d of 100+aa, and a flange part 7 connected to the opening thereof. .
第３図は、前記方法により得られた部品素材５において
、アルミニウム合金板１の面粗さＲｍａｘと亀裂発生点
との関係を示す。その亀裂発生点は、第２図に示すよう
にカップ形本体６の外底面８から亀裂発生箇所ａまでの
距離すで表わされている。FIG. 3 shows the relationship between the surface roughness Rmax of the aluminum alloy plate 1 and the crack initiation point in the component material 5 obtained by the above method. The crack occurrence point is already represented by the distance from the outer bottom surface 8 of the cup-shaped main body 6 to the crack occurrence point a, as shown in FIG.
第３図から明らかなように、アルミニウム合金板ｌの面
粗さＲｍａｘを５μｍ以上、１０μｍ以下に設定するこ
とによって、その潤滑剤保持性が向上するので、亀裂の
発生が回避されて高品質な部品素材５が得られる。As is clear from Fig. 3, by setting the surface roughness Rmax of the aluminum alloy plate l to 5 μm or more and 10 μm or less, the lubricant retention property is improved, so the generation of cracks is avoided and high quality is achieved. A component material 5 is obtained.
従来の光輝面仕上げのアルミニウム合金板の面粗さＲｍ
ａｘは１．５μｍ以上、２．５ ｐ ｍ以下であり、第
３図より亀裂発生点１７〜２５ｍｍの範囲に亀裂が発生
することが判る。Surface roughness Rm of conventional bright finish aluminum alloy plate
ax is 1.5 μm or more and 2.5 pm or less, and it can be seen from FIG. 3 that cracks occur in the range of 17 to 25 mm from the crack initiation point.
第４図は、面粗さＲｍａ ｘ ５ μｍ以上、１０μｍ
以下のアルミニウム合金板１よりなる部品素材５に電着
塗装を施して得られた部品９を示す。１０は部品９の内
外面に形成された塗膜である。この電着塗装に当っては
、部品素材９の前記面粗さＲｍａ ｘに伴い塗料の付着
性が向上し、また塗膜厚との関係から前記面粗さであれ
ば、その凹凸粗面が塗膜面１１に現われることはなく、
その結果塗膜面１１は平滑化されている。Figure 4 shows surface roughness Rmax x 5 μm or more, 10 μm
A component 9 obtained by applying electrodeposition coating to a component material 5 made of the following aluminum alloy plate 1 is shown. 10 is a coating film formed on the inner and outer surfaces of the component 9. In this electrodeposition coating, the adhesion of the paint improves as the surface roughness Rmax of the component material 9 increases, and from the relationship with the coating film thickness, if the surface roughness is as described above, the uneven rough surface becomes It does not appear on the coating surface 11,
As a result, the coating surface 11 is smoothed.
Ｃ６発明の効果
本発明によれば、前記のように特定された面粗さを有す
るアルミニウム合金板を用いることによって、製造過程
において、深絞り加工および電着塗装を含む自動車車体
用アルミニウム合金製部品の生産性を向上させ、また塗
膜面の性状を良好にすることができる。C6 Effects of the Invention According to the present invention, by using an aluminum alloy plate having the surface roughness specified above, aluminum alloy parts for automobile bodies, including deep drawing and electrodeposition coating, can be manufactured in the manufacturing process. It is possible to improve productivity and improve the properties of the coated film surface.
第１図はアルミニウム合金板の一部拡大断面図、第２図
は部品素材の断面図、第３図はアルミニウム合金板の面
粗さと部品素材の亀裂発生点との関係を示すグラフ、第
４図は部品の要部断面図、第５図（ａ）〜（Ｃ）は従来
法における部品素材の深絞り工程図である。
１・・・アルミニウム合金板、２．３・・・面、４・・
・潤滑剤、５・・・部品素材、９・・・部品、１０・・
・塗膜時 許 出 願 人 本田技研工業株式会社同
菊池プレス工業株式会社代理人 弁理士
落 合 健同 仁
木 −明第１図
第２図
７ ノ
第３図
アルミニウム合金板の１ｆｉｉ ｔ［ｌさＲｍａｘ（７
ｚｍ）
第４０
第５図
（ａ）Figure 1 is a partially enlarged cross-sectional view of an aluminum alloy plate, Figure 2 is a cross-sectional view of the component material, Figure 3 is a graph showing the relationship between the surface roughness of the aluminum alloy plate and the crack initiation point of the component material, and Figure 4 The figure is a sectional view of the main part of the part, and FIGS. 5(a) to 5(C) are deep drawing process diagrams of the part material in the conventional method. 1... Aluminum alloy plate, 2.3... Surface, 4...
・Lubricant, 5... Parts material, 9... Parts, 10...
・At the time of coating Applicant: Honda Motor Co., Ltd.
Kikuchi Press Kogyo Co., Ltd. Representative Patent Attorney Kendo Hitoshi Ochiai
Figure 1 Figure 2 Figure 7 Figure 3 Aluminum alloy plate Rmax (7
zm) No. 40 Fig. 5 (a)
Claims (1)
深絞り加工を施して部品素材（５）を成形する工程と、
前記部品素材（５）に電着塗装を施す工程とを順次行う
自動車車体用アルミニウム合金製部品の製造方法におい
て、前記アルミニウム合金板（１）として、その画面（
２，３）の面粗さＲｍａｘが５μｍ以上、１０μｍ以下
のものを用いることを特徴とする自動車車体用アルミニ
ウム合金製部品の製造方法。forming a component material (5) by deep drawing an aluminum alloy plate (1) coated with a lubricant (4);
In the method for manufacturing aluminum alloy parts for automobile bodies, which sequentially performs the step of applying electrodeposition coating to the part material (5), the screen (
A method for manufacturing an aluminum alloy part for an automobile body, characterized in that 2, 3) a material having a surface roughness Rmax of 5 μm or more and 10 μm or less is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2297843A JP2617375B2 (en) | 1990-11-02 | 1990-11-02 | Manufacturing method of aluminum alloy parts for automobile body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2297843A JP2617375B2 (en) | 1990-11-02 | 1990-11-02 | Manufacturing method of aluminum alloy parts for automobile body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04174000A true JPH04174000A (en) | 1992-06-22 |
| JP2617375B2 JP2617375B2 (en) | 1997-06-04 |
Family
ID=17851872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2297843A Expired - Lifetime JP2617375B2 (en) | 1990-11-02 | 1990-11-02 | Manufacturing method of aluminum alloy parts for automobile body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2617375B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63238903A (en) * | 1987-03-27 | 1988-10-05 | Kobe Steel Ltd | Aluminum sheet and aluminum alloy sheet for deep drawing |
| JPS6468494A (en) * | 1987-09-10 | 1989-03-14 | Nissan Shatai Co | Surface treatment of combination product of aluminum formed body and iron formed body |
-
1990
- 1990-11-02 JP JP2297843A patent/JP2617375B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63238903A (en) * | 1987-03-27 | 1988-10-05 | Kobe Steel Ltd | Aluminum sheet and aluminum alloy sheet for deep drawing |
| JPS6468494A (en) * | 1987-09-10 | 1989-03-14 | Nissan Shatai Co | Surface treatment of combination product of aluminum formed body and iron formed body |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2617375B2 (en) | 1997-06-04 |
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