JP2687536B2 - Press forming method for bonded materials - Google Patents
Press forming method for bonded materialsInfo
- Publication number
- JP2687536B2 JP2687536B2 JP1004652A JP465289A JP2687536B2 JP 2687536 B2 JP2687536 B2 JP 2687536B2 JP 1004652 A JP1004652 A JP 1004652A JP 465289 A JP465289 A JP 465289A JP 2687536 B2 JP2687536 B2 JP 2687536B2
- Authority
- JP
- Japan
- Prior art keywords
- press
- mold
- die
- plate
- difference
- 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.)
- Expired - Lifetime
Links
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、板金プレス加工に関し、より詳しくは、厚
さの異なる板の結合素材をプレス成形する方法に関す
る。Description: TECHNICAL FIELD The present invention relates to sheet metal stamping, and more particularly to a method for press-forming a joining material of plates having different thicknesses.
〔従来の技術〕 従来、絞りプレス加工で成形素材としては素材全体に
わたって均一板厚さを有するかあるいはごくゆるやかな
板厚変化を有する金属板(鉄鋼、ステンレス鋼、アルミ
ニウム合金などの板)の使用に限定されていた。[Prior Art] Conventionally, a metal plate (a steel plate, a stainless steel plate, an aluminum alloy plate, etc.) having a uniform plate thickness or a gradual plate thickness change is used as a forming material in a drawing press process. Was limited to.
他方、レーザー溶接技術の実用化により、素材の有効
利用の点から製品歩留りの向上を図ったレーザー溶接結
合素材によるプレス成形も行なわれるようになっている
が、同一板厚の金属板組合せに限定されている。On the other hand, due to the practical use of laser welding technology, press forming with laser welded joint materials has also been performed to improve product yield from the viewpoint of effective use of materials, but it is limited to metal plate combinations with the same plate thickness. Has been done.
製品歩留り向上と共に製品重量の軽減を図るために、
厚さの異なる板をレーザー溶接結合した素材のプレス成
形品の開発が求められている。しかしながら、絞プレス
では上型と下型との間に素材の板厚と等しいクリアラン
スを持たせることが必要であり、素材結合部での板厚差
に応じたステップ(段差)に見合った金型クリアランス
のステップ状変化を金型に取り入れることは、結合素材
の金型への投入バラツキ、絞成形過程での結合素材の挙
動(変形・移動)のバラツキのために非常に難しい。そ
のため、異なる板厚のレーザー結合素材のプレス成形へ
の適用は製品の品質低下が不可避と考えられている。In order to improve product yield and reduce product weight,
It is required to develop a press-formed product made of a material obtained by laser-welding plates having different thicknesses. However, in the drawing press, it is necessary to have a clearance equal to the plate thickness of the material between the upper die and the lower die, and the die corresponding to the step (step) according to the sheet thickness difference at the material joining part. It is very difficult to introduce the step change of the clearance into the mold due to the variation in the injection of the bonding material into the mold and the variation in the behavior (deformation / movement) of the bonding material in the drawing process. Therefore, it is considered that the deterioration of product quality is inevitable when the laser-bonded materials having different plate thicknesses are applied to press molding.
第3図に厚さの異なる板を結合した(例えば、レーザ
ー溶接した)素材1の一例を示す。この場合に、板2,3,
4および5はそれぞれt2,t3,t4およびt5の厚さを有し、
(レーザー溶接)結合部6にて結合されており、板2
(t2)又は板4(t4)と板3(t3)および板5(t5)と
は厚さが異なる。このような素材1を板厚差に等しいス
テップ(段差)のクリアランス変化をつけたプレス金型
にてプレス成形した際に、素材(製品)に生じる歪の形
状を第4A図および第4B図に示す。第4A図および第4B図
は、板2と板3との結合部6付近での加工状況を示し、
金型の下型7にクリアランス段差8が設けられている。
クリアランス段差8での高低差Δtは結合板2および3
の板厚差t2−t3=Δtと等しい。なお、金型の上型は図
面上省略してある。第4A図は結合素材の結合部6がクリ
アランス段差8から薄板(3)側へずれている場合を示
し、第4B図は逆に厚板(2)側へずれている場合を示
し、図中ズレ量をlで、板の歪み高さ(深さ)をHで、
歪範囲をLで示す。本発明者による自動車用プレス鋼板
を用いた場合の実験によると、第5図に示した歪量比
(H/Lで示す)とズレ量lとの関係が得られた。結合素
材の金型への投入のバラツキおよび絞成形過程での素材
挙動のバラツキの合計(バラツキ範囲)が±10mmとなる
ことを考慮すると、製品に生ずる歪量比H/Lは±0.01の
範囲でバラツキがあり、製品品質が安定していないこと
が第5図からわかる。FIG. 3 shows an example of the material 1 in which plates having different thicknesses are combined (for example, laser-welded). In this case, the plates 2,3,
4 and 5 have thicknesses of t 2 , t 3 , t 4 and t 5 , respectively,
(Laser welding) The plate 2 is joined at the joining portion 6.
(T 2 ) or plate 4 (t 4 ) and plate 3 (t 3 ) and plate 5 (t 5 ) have different thicknesses. 4A and 4B show the shape of the strain generated in the material (product) when the material 1 is press-molded with a press die having a step (step) clearance change equal to the plate thickness difference. Show. FIG. 4A and FIG. 4B show a processing situation in the vicinity of the joint portion 6 between the plate 2 and the plate 3,
The lower die 7 of the die is provided with a clearance step 8.
The height difference Δt at the clearance step 8 is determined by the connecting plates 2 and 3
Is equal to the plate thickness difference t 2 −t 3 = Δt. The upper mold of the mold is omitted in the drawing. FIG. 4A shows the case where the joint portion 6 of the joint material is displaced from the clearance step 8 toward the thin plate (3) side, and FIG. 4B is the case where it is displaced toward the thick plate (2) side. The amount of deviation is 1, the strain height (depth) of the plate is H,
The strain range is indicated by L. According to an experiment conducted by the present inventor using a pressed steel sheet for automobiles, the relationship between the strain amount ratio (shown by H / L) and the shift amount 1 shown in FIG. 5 was obtained. Considering that the total variation (variation range) of the joining material into the mold and the variation in material behavior during the drawing process is ± 10 mm, the strain amount ratio H / L generated in the product is within ± 0.01. It can be seen from Fig. 5 that there are variations and the product quality is not stable.
そこで、本発明は、厚さの異なる板の結合素材をプレ
ス成形する際に結合部付近の歪量を小さくして高品質製
品を成形する方法を提供することを目的とする。Therefore, it is an object of the present invention to provide a method for forming a high quality product by reducing the amount of strain in the vicinity of a joint portion when press-forming joint materials for plates having different thicknesses.
上述の目的が、厚さの異なる板を溶接した結合素材を
上型および下型の金型でプレス成形する方法において、
結合素材の片側表面は平坦でありかつ金型の上型又は下
型と接し、一方、反対片側表面には板厚の差による素材
結合部での段差があり、金型の下型又は上型に板厚の差
とその50倍以上の長さとで作られる傾斜面を設け、素材
結合部を該傾斜面に位置させることを特徴とする結合素
材のプレス成形法によって達成される。In the method in which the above-mentioned object is press-molding the joining material in which the plates having different thicknesses are welded by the upper die and the lower die,
One side surface of the bonding material is flat and contacts the upper or lower mold of the mold, while the opposite side surface has a step at the material bonding part due to the difference in plate thickness, and the lower or upper mold of the mold This is achieved by a press-molding method of a bonding material, characterized in that an inclined surface made of a difference in plate thickness and a length of 50 times or more thereof is provided, and a material coupling portion is located on the inclined surface.
プレス金型の下型(又は上型)に比較的長い(ゆるや
かな)傾斜面を設け、該傾斜面に素材結合部が位置する
ようにして成形途中で素材が該傾斜面上をすべりやすく
し、歪み高さ(深さ)そして歪量H/Lを小さくする。A relatively long (slow) inclined surface is provided on the lower die (or upper die) of the press die, and the material joining part is located on the inclined surface so that the material can easily slide on the inclined surface during molding. , Strain height (depth) and strain amount H / L are reduced.
以下、本発明に係る場合を含む板厚差のある結合素材
のプレス成形例によって本発明を詳しく説明する。Hereinafter, the present invention will be described in detail with reference to an example of press-molding a bonding material having a plate thickness difference including the case according to the present invention.
第2図に、プレス金型の下型11でのクリアランス段差
12のある部分断面を示す。クリアランス段差12は傾斜面
であり、その高低差Δtはプレス加工する結合素材での
板厚差に等しく、その長さSはΔtよりもかなり大きく
してある。プレス金型の上型(図示せず)は平坦であ
り、結合素材の平坦表面と接する。したがって、逆に上
型にクリアランス段差を設けて、下型を平坦表面として
もよい。Fig. 2 shows the clearance difference in the lower die 11 of the press die.
12 shows a partial cross section with 12. The clearance step 12 is an inclined surface, and its height difference Δt is equal to the plate thickness difference in the joint material to be pressed, and its length S is made considerably larger than Δt. The upper die (not shown) of the press die is flat and contacts the flat surface of the bonding material. Therefore, conversely, a clearance step may be provided on the upper mold so that the lower mold has a flat surface.
従来と同じ異なる厚さの板の結合(レーザー溶接)素
材を第2図の下型11および平坦な上型でもって、段差の
ある結合部がクリアランス段差(傾斜面)12にくるよう
にしてプレス成形する。その際に、下型11のクリアラン
ス段差での高低差に対する長さの比(S/Δt)を50〜14
0の範囲で変えて行ない、結合部付近での歪み高さ(深
さ)Hと歪範囲Lとの歪量比H/Lを求めて、第1図に示
す結果が得られた。比(S/Δt)を大きくするにつれ
て、歪量比(H/L)が小さくなる。Press the plate joining (laser welding) material having the same thickness as the conventional one with the lower die 11 and the flat upper die in FIG. 2 so that the joining portion with the step comes to the clearance step (sloping surface) 12. Mold. At that time, the ratio of the length to the height difference (S / Δt) at the clearance step of the lower mold 11 is 50 to 14
The strain amount ratio H / L between the strain height (depth) H and the strain range L near the joint was determined by changing the strain in the range of 0, and the results shown in FIG. 1 were obtained. As the ratio (S / Δt) increases, the strain amount ratio (H / L) decreases.
歪量比H/Lが0.005以下、例えば、歪範囲20mmでの歪み
高さ(深さ)0.1mm以下であれば、製品としての品質は
自動車用部品において許容できる。このことからクリア
ランス段差での比S/Δtは90以上とすることが第1図か
らわかる。この量は結合素材の投入および挙動バラツキ
の範囲が±10mm(計20mm)であることを考慮しても歪量
比に変化が生じない。If the strain amount ratio H / L is 0.005 or less, for example, the strain height (depth) in the strain range of 20 mm is 0.1 mm or less, the quality of the product is acceptable in automobile parts. From this, it can be seen from FIG. 1 that the ratio S / Δt at the clearance step is 90 or more. This amount does not change in the strain amount ratio even when considering that the range of variation of the input of the bonding material and the behavior is ± 10 mm (total 20 mm).
したがって、厚さの異なる板を結合した素材をプレス
成形するための金型は、上型又は下型の一方での結合素
材の結合部が当接する部位に板厚差Δtに相当する高低
差のクリアランス段差をΔtの90倍以上の長さで変化さ
せるゆるやかな傾斜面を設けることによって、加工歪を
小さくして安定した品質のプレス製品を得ることができ
る。傾斜面の範囲はプレス品の要求品質によって第1図
より歪量比50〜140の範囲で決定する。Therefore, the metal mold for press-molding the material in which the plates having different thicknesses are combined has a height difference corresponding to the plate thickness difference Δt at the portion of the upper mold or the lower mold where the joint portion of the joint material abuts. By providing a gentle inclined surface that changes the clearance step by 90 times or more of Δt, it is possible to reduce the processing distortion and obtain a pressed product of stable quality. The range of the inclined surface is determined in the range of the strain amount ratio of 50 to 140 according to the required quality of the pressed product according to FIG.
本発明によれば、プレス金型に長い長さでの傾斜面を
形成するので、結合素材の結合部はバラツキがあっても
該傾斜面上に位置するようになり、かつプレス成形途中
での変形が傾斜面上をゆるやかになされるので、板厚差
に応じたクリアランス段差は成形での障害とはならな
い。これにより、従来、厚さに差のある結合素材は浅絞
り品に限定されていたが、深絞り品への適用が可能とな
る。According to the present invention, since the inclined surface having a long length is formed in the press die, the joint portion of the joint material can be located on the inclined surface even if there is variation, and the pressing material can be formed during the press molding. Since the deformation is gentle on the inclined surface, the clearance step corresponding to the difference in plate thickness does not hinder the forming. As a result, conventionally, the bonding material having a difference in thickness is limited to the shallow drawing product, but it can be applied to the deep drawing product.
第1図は、金型に設ける傾斜面のクリアランス段差での
高低差に対する長さの比とプレス成形品の結合素材に生
じる歪量比との関係を示すグラフであり、 第2図は、金型に設けた傾斜面のある下型の部分断面図
であり、 第3図は、厚さの異なる板の結合素材の斜視図であり、 第4A図および第4B図は、従来の金型で結合素材をプレス
成形したときの結合部付近での結合素材および下型の部
分断面図であり、および 第5図は、従来の金型で板厚差のある結合素材をプレス
成形したときのズレ量と歪量比との関係を示すグラフで
ある。 1……結合素材、2〜5……板、 6……結合部、11……下型、 12……傾斜面、 Δt……クリアランス段差(板厚差)、 S……傾斜面での長さ。FIG. 1 is a graph showing the relationship between the ratio of the length to the height difference in the clearance step of the inclined surface provided in the mold and the strain amount ratio generated in the bonding material of the press-formed product, and FIG. FIG. 4 is a partial cross-sectional view of a lower mold having an inclined surface provided in the mold, FIG. 3 is a perspective view of a joining material of plates having different thicknesses, and FIGS. 4A and 4B are conventional molds. FIG. 5 is a partial cross-sectional view of the joining material and the lower die near the joining portion when the joining material is press-molded, and FIG. 5 is a deviation when the joining material having a plate thickness difference is press-formed with a conventional die. It is a graph which shows the relationship between the amount and the strain amount ratio. 1 ... Coupling material, 2-5 ... Plate, 6 ... Coupling part, 11 ... Lower mold, 12 ... Slope, Δt ... Clearance step (plate thickness difference), S ... Length at slope It is.
Claims (1)
および下型の金型でプレス成形する方法において、前記
結合素材の片側表面は平坦でありかつ前記金型の上型又
は下型と接し、一方、反対片側表面には板厚の差による
素材結合部での段差があり、前記金型の下型又は上型に
板厚の差とその50倍以上の長さとで作られる傾斜面を設
け、前記素材結合部を該傾斜面に位置させることを特徴
とする結合素材のプレス成形法。1. A method of press-molding a joining material, which is obtained by welding plates having different thicknesses, with an upper die and a lower die, wherein one side surface of the joining material is flat and the upper die or the lower die of the die. On the other hand, there is a step on the opposite side surface at the material joining part due to the difference in plate thickness, and the lower mold or upper mold of the mold is made with the difference in plate thickness and 50 times or more of that difference. A method for press-molding a joining material, comprising providing an inclined surface and arranging the material joining portion on the inclined surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1004652A JP2687536B2 (en) | 1989-01-13 | 1989-01-13 | Press forming method for bonded materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1004652A JP2687536B2 (en) | 1989-01-13 | 1989-01-13 | Press forming method for bonded materials |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02187226A JPH02187226A (en) | 1990-07-23 |
JP2687536B2 true JP2687536B2 (en) | 1997-12-08 |
Family
ID=11589884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1004652A Expired - Lifetime JP2687536B2 (en) | 1989-01-13 | 1989-01-13 | Press forming method for bonded materials |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2687536B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003080321A (en) * | 2001-09-06 | 2003-03-18 | Honda Motor Co Ltd | Method and device for press-forming assembled blank material |
JP2013046920A (en) * | 2011-08-29 | 2013-03-07 | Honda Motor Co Ltd | Tailored blank material molding method, device and panel |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5933299B2 (en) * | 2012-03-09 | 2016-06-08 | 本田技研工業株式会社 | Press forming equipment |
-
1989
- 1989-01-13 JP JP1004652A patent/JP2687536B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003080321A (en) * | 2001-09-06 | 2003-03-18 | Honda Motor Co Ltd | Method and device for press-forming assembled blank material |
JP4627937B2 (en) * | 2001-09-06 | 2011-02-09 | 本田技研工業株式会社 | Method and apparatus for press forming aggregate blank material |
JP2013046920A (en) * | 2011-08-29 | 2013-03-07 | Honda Motor Co Ltd | Tailored blank material molding method, device and panel |
Also Published As
Publication number | Publication date |
---|---|
JPH02187226A (en) | 1990-07-23 |
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