JPH11104750A - Press forming method for abutt welding board - Google Patents
Press forming method for abutt welding boardInfo
- Publication number
- JPH11104750A JPH11104750A JP9265302A JP26530297A JPH11104750A JP H11104750 A JPH11104750 A JP H11104750A JP 9265302 A JP9265302 A JP 9265302A JP 26530297 A JP26530297 A JP 26530297A JP H11104750 A JPH11104750 A JP H11104750A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- butt
- forming
- press
- thickness
- 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.)
- Pending
Links
Landscapes
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は突き合わせ溶接板の
プレス成形方法、より具体的には、板厚あるいは引張り
強度の異なる板を突き合わせ溶接したブランク材を深絞
り成形あるいは張り出し成形によってプレス成形する方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for press-forming a butt-welded plate, and more specifically, a method for press-forming a blank material obtained by butt-welding plates having different thicknesses or tensile strengths by deep drawing or bulging. About.
【０００２】[0002]
【従来の技術】従来の板厚あるいは引張り強度の異なる
板を突き合わせ溶接したブランク材をプレス成形する方
法としては、図４に示すような構造のものがあった。こ
の従来技術は、差厚テーラードブランクによるドアイン
ナパネルのプレス成形方法で、引張り強度、あるいは、
板厚の異なる板同士をレーザ等を用いて突き合わせ溶接
した後、プレス成形する方法である（『塑性と加工』、
ｖｏｌ３８−４３２（１９９７））。なお、図中、符号
１は板厚の薄い板材、２は板厚の厚い板材、３は溶接ビ
ード、４は成形後のパネル（完成品）である。2. Description of the Related Art As a conventional method for press-forming a blank material obtained by butt-welding plates having different plate thicknesses or tensile strengths, there is a method as shown in FIG. This prior art is a method of press forming door inner panels using a tailored blank with a different thickness, and has a tensile strength or
It is a method of butt-welding plates with different thicknesses using a laser or the like, and then press forming ("Plasticity and processing",
vol 38-432 (1997)). In the drawings, reference numeral 1 denotes a thin plate material, 2 denotes a thick plate material, 3 denotes a weld bead, and 4 denotes a formed panel (completed product).
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の突き合わせ溶接板にあっては、突き合わせ溶
接位置において材質と板厚の変化が集中していたため、
板厚あるいは引張り強度の異なる板を突き合わせ溶接し
たブランク材のプレス成形方法では、深絞り成形のポン
チ底部を横切る位置にブランク材の突き合わせ部が配置
され、かつ、板厚が厚い板が縮みフランジ成形を生じる
部位に隣接してブランク材の突き合わせ部が配置される
場合、ポンチ底部の突き合わせ溶接部近傍では、低強度
材側あるいは板厚の薄い板側にひずみが集中して割れが
発生し、フランジ部では板厚の薄い板にしわが発生す
る、という問題点があった。However, in such a conventional butt welding plate, the change in the material and the plate thickness is concentrated at the butt welding position.
In the blank press method in which plates with different plate thicknesses or tensile strengths are butt-welded, the butt portion of the blank is placed at a position that crosses the bottom of the punch in deep drawing, and the plate with a large plate thickness shrinks to form a flange. When the butt portion of the blank material is placed adjacent to the part where the crack occurs, strain concentrates on the low-strength material side or the thin plate side near the butt weld at the bottom of the punch, causing cracks, In the part, there was a problem that wrinkles occurred in a thin plate.
【０００４】あるいは、また、板材の突き合わせ位置が
ポンチ底部の凸形状あるいは凹形状を横切って配置され
る張り出し成形であり、かつ、突き合わせ溶接されたブ
ランク板のうちの板厚と強度の積が大きい方の板が、ポ
ンチ底部の凸形状あるいは凹形状の曲率半径の中心を超
えて突き合わせ位置が配置されないプレス成形では、突
き合わせる板の強度あるいは板厚差が大きくなると、突
き合わせ溶接部近傍では、低強度材側あるいは板厚の薄
い板側にひずみが集中して割れが発生するという問題点
があった。Alternatively, the butt-welding position of the plate material is bulging formed so as to cross the convex or concave shape of the bottom of the punch, and the product of the plate thickness and strength of the butt-welded blank plate is large. In the press forming in which the butting position is not arranged beyond the center of the radius of curvature of the convex or concave shape of the punch bottom, if the strength of the butting plate or the difference in plate thickness increases, the low There is a problem that strain concentrates on the side of the strength material or on the side of the thin plate to cause cracking.
【０００５】本発明は、このような従来の問題点に着目
してなされたもので、板厚の異なる板を、レーザあるい
は電子ビームによって突き合わせ溶接されたブランク板
の縮みフランジ成形を含むプレス成形であって、ポンチ
底を横切る位置にブランク材の突き合わせ部が配置さ
れ、かつ、板厚が厚い板が縮みフランジ成形を生じる部
位に隣接してブランク材の突き合わせ部が配置されるプ
レス成形において、板厚の異なる板を突き合わせる場合
に突き合わせる板間に、厚板材と薄板材との中間の板厚
を有する板材を少なくとも１枚以上挿んで突き合わせ溶
接を行ったブランク材を用いて、板厚が厚い板と薄い板
との間に挿んだ板材と板厚の厚い方の板と溶接線の位置
が縮みフランジ成形部のポンチプロファイルの外側にな
るように配置してプレス成形すること、あるいは、ブラ
ンク板の張り出し成形を含むプレス成形であって、板材
の突き合わせ位置が、ポンチ底部の凸形状あるいは凹形
状を横切って配置され、かつ、突き合わせ溶接されたブ
ランク板のうちの板厚と強度の積が大きい方の板が、ポ
ンチ底部の凸形状あるいは凹形状の曲率半径の中心を超
えて突き合わせ位置が配置されないプレス成形におい
て、突き合わされるそれぞれの板の強度と板厚の積の範
囲に強度と板厚の積を有する板材を少なくとも１枚以上
挿んで突き合わせ溶接したブランク材を用いて、プレス
成形することにより、上記問題点を解決することを目的
としている。The present invention has been made in view of such a conventional problem, and press-forming a plate having a different thickness by press-forming including shrink flange forming of a blank plate butt-welded by a laser or an electron beam. In press forming in which a butt portion of a blank material is arranged at a position crossing a punch bottom and a butt portion of a blank material is arranged adjacent to a portion where a thick plate is shrunk to cause flange forming, In the case where plates having different thicknesses are butt-joined, at least one plate having an intermediate thickness between a thick plate and a thin plate is inserted and butt-welded between the butted plates. The plate material inserted between the thick plate and the thin plate, the thicker plate and the position of the welding line are shrunk and positioned so that they are outside the punch profile of the flange forming part. Forming, or press forming including overhang forming of the blank plate, wherein the butt position of the plate material is disposed across the convex or concave shape of the punch bottom, and the butt-welded blank plate In the press forming where the product of the thickness and the strength of the larger plate is not arranged at the butting position beyond the center of the radius of curvature of the convex or concave shape of the bottom of the punch, the strength and the thickness of each butted plate are It is an object of the present invention to solve the above-mentioned problem by press-forming using a blank material which is butt-welded by inserting at least one sheet material having a product of strength and plate thickness in the range of the product.
【０００６】[0006]
【課題を解決するための手段】本発明は上述の課題を解
決するために、突き合わせ溶接板のプレス成形方法にお
いて、板厚の異なる板を、レーザあるいは電子ビームに
よって突き合わせ溶接されたブランク板の縮みフランジ
成形を含むプレス成形であって、ポンチ底を横切る位置
にブランク材の突き合わせ部が配置され、かつ、板厚が
厚い板が縮みフランジ成形を生じる部位に隣接してブラ
ンク材の突き合わせ部が配置されるプレス成形におい
て、厚板材と薄板材との中間の板厚を有する板材を少な
くとも１枚以上挿んで突き合わせ溶接を行ったブランク
材を用いて、板厚が厚い板と薄い板との間に挿んだ板材
と板厚の厚い方の板と溶接線の位置が縮みフランジ成形
部のポンチプロファイルの外側になるように配置してプ
レス成形することを特徴とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for press-forming a butt-welded plate. Press forming including flange forming, where the butting portion of the blank material is arranged at a position crossing the bottom of the punch, and the butting portion of the blank material is arranged adjacent to the portion where the thick plate shrinks and causes flange forming In the press forming, a blank having a thickness of at least one between a thick plate and a thin plate inserted and subjected to butt welding is used, and between a thick plate and a thin plate. Press-forming by arranging the inserted plate material, the thicker plate and the welding line so that the position of the welding line is outside the punch profile of the flange forming part And butterflies.
【０００７】また本発明は、前記突き合わせ溶接板のプ
レス成形方法において、板厚が厚い板と薄い板との間に
挿まれる板材は、その板厚が、板厚が厚い板と薄い板の
板厚の合計の０．５６〜０．６４倍の範囲であることを
特徴とする。Further, according to the present invention, in the method for press forming a butt-welded plate, the plate material inserted between the thick plate and the thin plate has a plate thickness of a thick plate and a thin plate. It is characterized in that it is in the range of 0.56 to 0.64 times the total thickness.
【０００８】また本発明は、前記突き合わせ溶接板のプ
レス成形方法において、板厚が厚い板と薄い板との間に
挿まれる板材は、板厚と強度の積が、板厚が薄い板の板
厚と強度の積の１．３倍を超えない範囲であることを特
徴とする。Further, according to the present invention, in the method for press-forming a butt-welded plate, the plate material inserted between the thick plate and the thin plate has a product of the plate thickness and the strength of the thin plate. The thickness is not more than 1.3 times the product of the thickness and the strength.
【０００９】また本発明は、前記突き合わせ溶接板のプ
レス成形方法において、板厚が厚い板と薄い板との間に
挿まれる板材の幅は、５〜２５ｍｍの範囲であることを
特徴とする。Further, the present invention is characterized in that in the method of press-forming a butt-welded plate, the width of a plate material inserted between a thick plate and a thin plate is in a range of 5 to 25 mm. .
【００１０】また本発明は、突き合わせ溶接板のプレス
成形方法において、板厚あるいは引張り強度の異なる板
を、レーザあるいは電子ビームによって突き合わせ溶接
されたブランク板の張り出し成形を含むプレス成形であ
って、板材の突き合わせ位置が、ポンチ底部の凸形状あ
るいは凹形状を横切って配置され、かつ、突き合わせ溶
接されたブランク板のうちの板厚と強度の積が大きい方
の板が、ポンチ底部の凸形状あるいは凹形状の最も大き
な曲率半径の中心を超えて突き合わせ位置が配置されな
いプレス成形において、突き合わされるそれぞれの板の
強度と板厚の積の範囲に強度と板厚の積を有する板材を
少なくとも１枚以上挿んで突き合わせ溶接したブランク
材を用いて、プレス成形することを特徴とする。The present invention also relates to a press forming method for a butt-welded plate, which comprises press-forming a blank having a plate thickness or a tensile strength different from each other by butt welding using a laser or an electron beam. The butted position of the punch bottom is arranged across the convex or concave shape of the punch bottom, and the plate with the greater product of the plate thickness and strength of the butt-welded blank plate is the convex or concave shape of the punch bottom. In the press forming in which the butting position is not arranged beyond the center of the largest radius of curvature of the shape, at least one or more sheet materials having the product of the strength and the sheet thickness in the range of the product of the strength and the sheet thickness of each butted plate to be joined It is characterized in that it is press-formed using a blank material inserted and butt-welded.
【００１１】（請求項６）また本発明は、突き合わせ溶
接板のプレス成形方法において、板厚あるいは引張り強
度の異なる板を、レーザあるいは電子ビームによって突
き合わせ溶接されたブランク板の張り出し成形を含むプ
レス成形であって、板材の突き合わせ位置が、ポンチ底
部の凸形状あるいは凹形状を横切って配置され、凹凸部
のポンチまたはダイプロファイルの曲率半径に対する凹
凸形状の高さの比が０．４以上である凹凸形状を、板材
の突き合わせ位置が横切って配置され、かつ、突き合わ
せ溶接されたブランク板のうちの板厚と強度の積が大き
い方の板が、ポンチ底部の凸形状あるいは凹形状の曲率
半径の中心を超えて突き合わせ位置が配置されないプレ
ス成形において、突き合わされるそれぞれの板の強度と
板厚の積の範囲に強度と板厚の積を有する板材を少なく
とも１枚以上挿んで突き合わせ溶接したブランク材を用
いて、プレス成形することを特徴とする。According to a sixth aspect of the present invention, there is provided a method for press-forming a butt-welded plate, comprising press-forming a blank plate butt-welded to a plate having a different thickness or tensile strength by a laser or an electron beam. Wherein the abutting position of the plate material is arranged across the convex or concave shape of the punch bottom, and the ratio of the height of the concave and convex shape to the radius of curvature of the punch or die profile of the concave and convex portion is 0.4 or more. The shape, the plate material is arranged across the butt position, and of the butt-welded blank plate, the larger product of the thickness and strength is the center of the convex or concave radius of curvature of the punch bottom. In the press forming where the butting position is not arranged beyond the range of the product of the strength and plate thickness of each butted plate With degrees and the thickness of the plate material having a product butt Nde least one or more interpolation welded blanks, characterized by press-molding.
【００１２】また本発明は、前記突き合わせ溶接板のプ
レス成形方法において、板厚あるいは引張り強度の異な
る板の間に挿まれる板材は、板厚と強度の積が小さい方
の板材の板厚と強度の積の０．７７倍を超えない範囲で
あることを特徴とする。Further, according to the present invention, in the method for press-forming a butt-welded plate, the plate material inserted between the plates having different thicknesses or tensile strengths has a smaller thickness-strength product. It is characterized by a range not exceeding 0.77 times the product.
【００１３】また本発明は、前記突き合わせ溶接板のプ
レス成形方法において、板厚あるいは引張り強度の異な
る板の間に挿まれる板材の幅は、５〜２５ｍｍの範囲で
あることを特徴とする。The present invention is characterized in that, in the method for press-forming a butt-welded plate, the width of a plate material inserted between plates having different thicknesses or tensile strengths is in a range of 5 to 25 mm.
【００１４】[0014]
【発明の実施の形態】以下、本発明による突き合わせ溶
接板のプレス成形方法の実施の形態を添付図面を参照し
て詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for press-forming a butt-welded plate according to the present invention will be described below in detail with reference to the accompanying drawings.
【００１５】（第１の実施の形態）図１は、本発明によ
る突き合わせ溶接板のプレス成形方法の第１の実施の形
態を示す図である。まず、図１を用いて構成を説明す
る。板厚の厚い板１３と、薄い板１１と、その間に挿入
された板１２が、それぞれレーザによって溶接されて１
枚のブランク材となっている。このブランク材を車体の
ドアインナパネルにプレス成形する。このとき、板厚の
厚い板１３と中間に挿入したレーザ溶接位置を縮みフラ
ンジ成形部１１のコーナＲよりも外側に配置する。(First Embodiment) FIG. 1 is a diagram showing a first embodiment of a method for press-forming a butt weld plate according to the present invention. First, the configuration will be described with reference to FIG. The thick plate 13, the thin plate 11, and the plate 12 inserted therebetween are welded by laser, respectively.
It is a piece of blank material. This blank is press-formed into a door inner panel of the vehicle body. At this time, the laser welding position inserted between the thick plate 13 and the middle is contracted and arranged outside the corner R of the flange forming portion 11.
【００１６】板厚が厚い板１３の板厚は１．４ｍｍであ
り、薄い板１１の板厚は０．７ｍｍであるときの中間に
挿入する板１２は、引張り強度は薄い板とほぼ同じ引張
り強度の板であって、中間に挿入する板の板厚は、引張
り強度と板厚の積が板厚が薄い板１１の１．３倍を上回
らないように０．９ｍｍにする。When the thickness of the thick plate 13 is 1.4 mm and the thickness of the thin plate 11 is 0.7 mm, the plate 12 inserted in the middle has the same tensile strength as the thin plate. The thickness of the plate to be inserted in the middle is set to 0.9 mm so that the product of the tensile strength and the plate thickness does not exceed 1.3 times that of the thin plate 11.
【００１７】挿入される板１２の板幅は３０ｍｍ以下
で、５ｍｍ以上とする。幅が広すぎると、挿入される板
１２のひずみが大きくなり、割れが発生しやすくなる。
一方、幅が狭すぎると、板厚の薄い板１１へのひずみの
集中が発生する。The width of the plate 12 to be inserted is 30 mm or less and 5 mm or more. If the width is too large, the distortion of the inserted plate 12 increases, and cracks are likely to occur.
On the other hand, if the width is too small, concentration of strain on the thin plate 11 occurs.
【００１８】このようにして、２つの板厚の異なる板を
レーザで接合するとき、２つの板の間に板厚の薄い板の
板厚を挿入して突き合わせ溶接を行って、プレス成形す
ることによって、板厚の薄い板にひずみが集中すること
による割れの発生を抑えることができ、プレス成形性が
向上する。In this way, when two plates having different thicknesses are joined by a laser, the thickness of the thinner plate is inserted between the two plates, butt welding is performed, and press forming is performed. Cracking due to concentration of strain on a thin plate can be suppressed, and press formability is improved.
【００１９】次に、第１の実施の形態の作用を説明す
る。板厚の異なる板の間に挿入される板は、板厚の厚い
板１３と薄い板１１の間の板厚に設定される。絞り成形
のポンチ底部、あるいは、張り出し成形の凹凸部では、
板の強度あるいは板厚の違いによって、板厚の厚い板１
３側に成形時に溶接線の位置が変化し、また、絞り成形
の縮みフランジ成形部１４では、板厚の厚い板１３が薄
い板１１を押し出すように材料の移動が生じる。Next, the operation of the first embodiment will be described. The plate inserted between the plates having different thicknesses is set to a thickness between the thicker plate 13 and the thinner plate 11. At the bottom of the punch for drawing or the uneven part of the overhang,
Thick plate 1 depending on the strength or thickness of the plate
The position of the welding line changes during molding to the third side, and the material moves in the shrink flange forming portion 14 of the draw forming so that the thick plate 13 pushes the thin plate 11.
【００２０】板厚の厚い板１３側が、縮みフランジ成形
を受ける絞り成形のポンチ底部の縮みフランジ成形部１
４近傍に溶接線がある場合、あるいは、ポンチ底部の凹
凸の張り出し成形に溶接線がある場合は、板厚と強度の
積の小さい側にひずみが集中して、割れが発生しやす
い。The thicker plate 13 side is subjected to a shrink flange forming process.
In the case where there is a welding line in the vicinity of 4 or when there is a welding line in the projection forming of the unevenness on the bottom of the punch, strain concentrates on the side where the product of the plate thickness and the strength is small, and cracks are likely to occur.
【００２１】第３の板を２つの板に挿んで突き合わせ溶
接した板は、その板幅を５〜３０ｍｍに設定することに
よって、溶接部近傍の集中を緩和させる働きがある。条
件範囲より板幅が狭いと、レーザ溶接ビード１５による
強化が起こり、ひずみの集中を緩和する効果が小さい。
一方、条件範囲より板幅が広いと、レーザ溶接ビード１
５に挿まれた帯板としての材料の効果が減少し、挿んだ
板材の板厚減少が大きくなり、通常の突き合わせレーザ
溶接板の特性に近づき、期待以上の効果は得られない。
つまり、２つのレーザ溶接ビード１５によって挿まれた
帯板には、両側のレーザ溶接ビード１５によってプレス
成形時には拘束を受けながら変形することによる強化作
用を期待できる。The plate obtained by butt-welding the third plate inserted into two plates has a function of alleviating the concentration near the weld by setting the plate width to 5 to 30 mm. If the plate width is smaller than the condition range, the reinforcement by the laser welding bead 15 occurs, and the effect of relaxing the concentration of strain is small.
On the other hand, if the sheet width is wider than the condition range, the laser welding bead 1
The effect of the material as the strip inserted in 5 is reduced, the thickness of the inserted plate is greatly reduced, and the characteristics of a normal butt laser welded plate are approached.
In other words, the strip inserted by the two laser welding beads 15 can be expected to have a strengthening effect by being deformed while being restrained by the laser welding beads 15 on both sides during press forming.
【００２２】さらに、絞り成形においては、プレス型に
はレーザ溶接線が移動する量を見込んで板厚のクリアラ
ンスを変化させて設計され、板厚差のあるレーザ溶接板
のプレス成形において溶接線が縮みフランジ成形部１４
近傍にあると、クリアランスの違いによって、板厚の薄
い板１１が座屈し、パネルの品質を低下させる問題があ
ったが、２つの板の中間の板厚を有する第３の板を板間
に挿んで突き合わせ溶接したブランク材をプレス成形す
ることによって、プレス型に設けるクリアランスは、図
２に示すように、階段状に設けることができ、板厚差に
よるクリアランスの差が小さくなるため、縮みフランジ
成形部１４に発生する板のうねりを小さくすることがで
き、品質が向上する。Further, in the draw forming, the press die is designed by changing the thickness clearance in anticipation of the amount of movement of the laser welding line, and the welding line is formed in the press forming of a laser welded plate having a thickness difference. Shrink flange forming part 14
In the vicinity, there is a problem that the thin plate 11 buckles due to the difference in clearance and deteriorates the quality of the panel, but a third plate having an intermediate thickness between the two plates is placed between the plates. By press-forming the blank material that has been inserted and butt-welded, the clearance provided in the press mold can be provided in a stepwise manner as shown in FIG. 2, and the difference in clearance due to the difference in plate thickness is reduced. The undulation of the plate generated in the forming part 14 can be reduced, and the quality is improved.
【００２３】（第２の実施の形態）図３は、本発明によ
る突き合わせ溶接板のプレス成形方法の第２の実施の形
態を示す図である。第２の実施の形態は、プレス成形の
ポンチ底面２６に凹凸があり、引張り強度あるいは板厚
の異なるレーザ溶接板の溶接ビード２４がこれらのポン
チ底面２６の凹凸を横切って設けられ、かつ、突き合わ
された材料のうち、引張り強度と板厚の積が大きい方の
材料がポンチ底面２６の凹凸形状のいくつかの曲率半径
のうち、最も大きい曲率半径の中心２５を超えて突き合
わせ位置が配置されないため、板厚と引張り強度の積が
１．４倍以上の差になると割れが発生する可能性が高
い。特に形状の曲率半径に対して、凸形状のポンチ底面
２６に対する高さが高いと割れが発生する。(Second Embodiment) FIG. 3 is a view showing a second embodiment of the method for press-forming a butt weld plate according to the present invention. In the second embodiment, the punch bottom surface 26 of the press molding has irregularities, and the welding beads 24 of the laser welding plates having different tensile strengths or plate thicknesses are provided across the irregularities of the punch bottom surface 26, Of the combined materials, the material having the larger product of the tensile strength and the plate thickness is not located at the abutting position beyond the center 25 of the largest radius of curvature of some of the radii of curvature of the uneven shape of the punch bottom surface 26. If the product of the plate thickness and the tensile strength is 1.4 times or more, cracks are likely to occur. In particular, cracks occur when the height of the convex punch bottom 26 is high with respect to the radius of curvature of the shape.
【００２４】第２の実施の形態は、プレス型のポンチ底
部に凸形状を成形する部品のプレス成形を示す。引張り
強度３８ｋｇ／ｍｍ2 、板厚１．２ｍｍの板２３と、引
張り強度２８ｋｇ／ｍｍ2 、板厚０．７ｍｍの板２１を
突き合わせ溶接するとき、板厚と引張り強度の積が小さ
い板２１に対して、両板材２１，２３の間に板厚と引張
り強度の積が１．３倍を上回らない引張り強度２８ｋｇ
／ｍｍ2 、板厚０．９ｍｍの板２２を挿んでレーザによ
る突き合わせ溶接を行い、一枚のブランク板材とした。The second embodiment shows press forming of a part for forming a convex shape on the bottom of a punch of a press die. When a plate 23 having a tensile strength of 38 kg / mm 2 and a thickness of 1.2 mm and a plate 21 having a tensile strength of 28 kg / mm 2 and a thickness of 0.7 mm are butt-welded, a plate 21 having a small product of the thickness and the tensile strength is formed. In contrast, the product of the sheet thickness and the tensile strength between the two sheet materials 21 and 23 is not more than 1.3 times, and the tensile strength is 28 kg.
A plate 22 having a thickness of 0.9 mm / mm 2 and a thickness of 0.9 mm was inserted and butt-welded by laser to obtain a single blank plate.
【００２５】この３つの板２１，２２，２３の突き合わ
せ溶接によって作られた板を用いてプレス成形すること
によって、割れ発生の無い成形パネルを得ることができ
る。周囲からの材料の流入が期待できない状態でも、プ
レス成形の初期には材料の移動は生じ、引張り強度と板
厚の積が大きい材料の方に溶接線は引っ張られて、低強
度材あるいは薄い板材にひずみが集中する。あるいは、
引張り強度と板厚の積が大きい材料が、凹凸形状の曲率
半径のうち、最も大きい曲率半径の中心２５を越えて突
き合わせ位置が配置されないと、凸部の成形時に低強度
材あるいは薄い板材にひずみが集中し、割れが発生する
恐れがある。２つの板材間に第３の板材を挿んでプレス
成形することによって、低強度材あるいは薄い板材への
ひずみの集中を抑制し、プレス成形性を向上させること
ができる。By press-forming using a plate made by butt welding these three plates 21, 22, 23, a molded panel free from cracks can be obtained. Even in a state in which the inflow of material from the surroundings cannot be expected, the material moves in the early stage of press forming, and the welding line is pulled toward the material with a large product of tensile strength and plate thickness, and low strength material or thin plate material Strain is concentrated on Or,
If the material having a large product of the tensile strength and the plate thickness is not located at the abutting position beyond the center 25 of the largest radius of curvature of the uneven shape, the material may be deformed into a low-strength material or a thin plate at the time of forming the convex portion. May concentrate and cracks may occur. By inserting and pressing the third plate material between the two plate materials, the concentration of strain on a low-strength material or a thin plate material can be suppressed, and press formability can be improved.
【００２６】[0026]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、その構成を、板厚の異なる板を、レーザあるい
は電子ビームによって突き合わせ溶接されたブランク板
の縮みフランジ成形を含むプレス成形であって、ポンチ
底を横切る位置にブランク材の突き合わせ部が配置さ
れ、かつ、板厚が厚い板が縮みフランジ成形を生じる部
位に隣接してブランク材の突き合わせ部が配置されるプ
レス成形において、板厚の異なる板を突き合わせる場合
に突き合わせる板間に、厚板材と薄板材との中間の板厚
を有する板材を少なくとも１枚以上挿んで突き合わせ溶
接を行ったブランク材を用いて、板厚が厚い板と薄い板
との間に挿んだ板材と板厚の厚い方の板との溶接線の位
置が縮みフランジ成形部のポンチプロファイルの外側に
なるように配置してプレス成形すること、あるいは、ブ
ランク板の張り出し成形を含むプレス成形であって、板
材の突き合わせ位置が、ポンチ底部の凸形状あるいは凹
形状を横切って配置され、かつ、突き合わせ溶接された
ブランク板のうちの板厚と強度の積が大きい方の板が、
ポンチ底部の凸形状あるいは凹形状の曲率半径の中心を
超えて突き合わせ位置が配置されないプレス成形におい
て、突き合わされるそれぞれの板の強度と板厚の積の範
囲に強度と板厚の積を有する板材を少なくとも１枚以上
挿んで突き合わせ溶接したブランク材を用いて、プレス
成形することとしたため、ポンチ底を横切る位置にブラ
ンク材の突き合わせ部が配置され、かつ、板厚が厚い板
が縮みフランジ成形を生じる部位に隣接してブランク材
の突き合わせ部が配置されるプレス成形において、ある
いは、ブランク板の張り出し成形を含むプレス成形であ
って、板材の突き合わせ位置が、ポンチ底部の凸形状あ
るいは凹形状を横切って配置され、かつ、突き合わせ溶
接されたブランク板のうちの板厚と強度の積が大きい方
の板が、ポンチ底部の凸形状あるいは凹形状の曲率半径
の中心を超えて突き合わせ位置が配置されないプレス成
形において、中間に挿んだ板の板厚減少を抑制しつつ、
突き合わせる板材のうちの、板厚の薄い板、あるいは、
引張り強度と板厚の積が小さい方の板材へのひずみの集
中を低減でき、成形性を向上させることができる、とい
う効果が得られる。As described above in detail, according to the present invention, the structure of the present invention is formed by press forming including shrink flange forming of a blank plate butt-welded to a plate having a different thickness by a laser or an electron beam. In the press forming in which the butting portion of the blank material is arranged at a position crossing the punch bottom, and the butting portion of the blank material is arranged adjacent to a portion where the thick plate is shrunk and causes flange forming, In the case where plates having different thicknesses are butt-joined, at least one sheet having an intermediate thickness between the thick plate and the thin plate is inserted between the butted plates, and a blank material obtained by butt welding is used. The position of the welding line between the thicker plate and the plate material inserted between the thicker and thinner plate is shrunk so that it is outside the punch profile of the flange forming part. Or press forming including overhanging of a blank plate, where the butt position of the plate material is arranged across the convex or concave shape of the punch bottom, and of the butt-welded blank plate The board with the larger product of the thickness and strength of
In press forming in which the butting position is not arranged beyond the center of the convex or concave radius of curvature of the punch bottom, a sheet material having a product of strength and sheet thickness within a range of a product of strength and sheet thickness of each plate to be butted. Is pressed using a blank material that has been butt-welded by inserting at least one or more sheets, so that the butt portion of the blank material is arranged at a position crossing the bottom of the punch, and a thick plate is shrunk to form a flange. In the press forming in which the butted portion of the blank material is arranged adjacent to the portion to be formed, or in the press forming including the overhang forming of the blank plate, the butted position of the plate material crosses the convex or concave shape of the punch bottom. Of the blank plates butt-welded and butt-welded together, In press forming convex or butt beyond the center of the concave curvature radius position is not located in, while suppressing the reduction in thickness of the intermediate I inserted in a plate,
Of the plate materials to be matched, a thin plate or
The effect of reducing the concentration of strain on the sheet material having a smaller product of the tensile strength and the sheet thickness and improving the formability can be obtained.
【図１】本発明による突き合わせ溶接板のプレス成形方
法の第１の実施の形態の成形パネルの構成を示す図であ
る。FIG. 1 is a view showing a configuration of a formed panel according to a first embodiment of a method for press-forming a butt weld plate according to the present invention.
【図２】第１の実施の形態の縮みフランジ部における効
果を説明する図である。FIG. 2 is a diagram illustrating an effect of a contraction flange portion according to the first embodiment.
【図３】第２の実施の形態による張り出し成形部の構成
を示す図である。FIG. 3 is a diagram showing a configuration of an overhang forming part according to a second embodiment.
【図４】従来技術による差厚テーラードブランクによる
ドアインナパネルのプレス成形方法を示す図である。FIG. 4 is a view showing a method of press-molding a door inner panel using a differential thickness tailored blank according to the related art.
１１，２１ 板厚の薄い板 １２，２２ 挿入された板 １３，２３ 板厚の厚い板 １４ 縮みフランジ成形部 １５，２４ レーザ溶接ビード ２５ 曲率半径の中心 ２６ ポンチ底面 11, 21 Thin plate 12, 22 Inserted plate 13, 23 Thick plate 14 Shrink flange forming part 15, 24 Laser welding bead 25 Center of radius of curvature 26 Punch bottom
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ６２Ｄ 65/00 Ｂ６２Ｄ 65/00 Ｃ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B62D 65/00 B62D 65/00 C
Claims (8)
ビームによって突き合わせ溶接されたブランク板の縮み
フランジ成形を含むプレス成形であって、ポンチ底を横
切る位置にブランク材の突き合わせ部が配置され、か
つ、板厚が厚い板が縮みフランジ成形を生じる部位に隣
接してブランク材の突き合わせ部が配置されるプレス成
形において、 厚板材と薄板材との中間の板厚を有する板材を少なくと
も１枚以上挿んで突き合わせ溶接を行ったブランク材を
用いて、板厚が厚い板と薄い板との間に挿んだ板材と板
厚の厚い方の板と溶接線の位置が縮みフランジ成形部の
ポンチプロファイルの外側になるように配置してプレス
成形することを特徴とする突き合わせ溶接板のプレス成
形方法。1. A press forming including a shrink flange forming of a blank plate obtained by butt welding plates having different thicknesses by a laser or an electron beam, wherein a butt portion of a blank material is arranged at a position crossing a punch bottom, And, in the press forming in which the butted portion of the blank material is arranged adjacent to the portion where the thick plate is shrunk and the flange is formed, at least one or more plate materials having an intermediate thickness between the thick plate material and the thin plate material are provided. Using the blank material inserted and butt-welded, the plate material inserted between the thick and thin plates, the thicker plate and the welding line shrink, and the punch profile of the flange forming part A press forming method for a butt welded plate, wherein the press forming is performed by arranging the butt welded plate so as to be on the outside thereof.
レス成形方法において、 板厚が厚い板と薄い板との間に挿まれる板材は、その板
厚が、板厚が厚い板と薄い板の板厚の合計の０．５６〜
０．６４倍の範囲であることを特徴とする突き合わせ溶
接板のプレス成形方法。2. The method for press-forming a butt-welded plate according to claim 1, wherein the plate material inserted between the thick plate and the thin plate has a plate thickness smaller than that of the thick plate. 0.56 of the total thickness of the board
A method for press-forming a butt-welded plate, wherein the ratio is 0.64 times.
接板のプレス成形方法において、 板厚が厚い板と薄い板との間に挿まれる板材は、板厚と
強度の積が、板厚が薄い板の板厚と強度の積の１．３倍
を超えない範囲であることを特徴とする突き合わせ溶接
板のプレス成形方法。3. The method for press-forming a butt-welded plate according to claim 1, wherein the product of the thickness and the strength is a product of the thickness and the strength of the plate inserted between the thick and thin plates. Is less than 1.3 times the product of the thickness and the strength of a thin plate.
合わせ溶接板のプレス成形方法において、 板厚が厚い板と薄い板との間に挿まれる板材の幅は、５
〜２５ｍｍの範囲であることを特徴とする突き合わせ溶
接板のプレス成形方法。4. The method for press-forming a butt-welded plate according to claim 1, wherein the width of the plate inserted between the thick plate and the thin plate is 5 mm.
A method for press-forming a butt-welded plate, which is in a range of about 25 mm.
レーザあるいは電子ビームによって突き合わせ溶接され
たブランク板の張り出し成形を含むプレス成形であっ
て、板材の突き合わせ位置が、ポンチ底部の凸形状ある
いは凹形状を横切って配置され、かつ、突き合わせ溶接
されたブランク板のうちの板厚と強度の積が大きい方の
板が、ポンチ底部の凸形状あるいは凹形状の最も大きな
曲率半径の中心を超えて突き合わせ位置が配置されない
プレス成形において、 突き合わされるそれぞれの板の強度と板厚の積の範囲に
強度と板厚の積を有する板材を少なくとも１枚以上挿ん
で突き合わせ溶接したブランク材を用いて、プレス成形
することを特徴とする突き合わせ溶接板のプレス成形方
法。5. A plate having a different thickness or tensile strength,
Press forming including overhang forming of a blank plate butt-welded by a laser or an electron beam, wherein a butt position of a plate material is arranged across a convex or concave shape of a punch bottom, and a butt-welded blank plate In the press forming in which the product of the thickness and the strength of the larger one is larger than the center of the largest radius of curvature of the convex or concave shape of the punch bottom and the butting position is not arranged, the A press-forming method for a butt-welded plate, characterized in that at least one plate having a product of the strength and the thickness in the range of the product of the strength and the thickness is inserted and butt-welded to perform blanking.
レーザあるいは電子ビームによって突き合わせ溶接され
たブランク板の張り出し成形を含むプレス成形であっ
て、板材の突き合わせ位置が、ポンチ底部の凸形状ある
いは凹形状を横切って配置され、凹凸部のポンチまたは
ダイプロファイルの曲率半径に対する凹凸形状の高さの
比が０．４以上である凹凸形状を、板材の突き合わせ位
置が横切って配置され、かつ、突き合わせ溶接されたブ
ランク板のうちの板厚と強度の積が大きい方の板が、ポ
ンチ底部の凸形状あるいは凹形状の曲率半径の中心を超
えて突き合わせ位置が配置されないプレス成形におい
て、 突き合わされるそれぞれの板の強度と板厚の積の範囲に
強度と板厚の積を有する板材を少なくとも１枚以上挿ん
で突き合わせ溶接したブランク材を用いて、プレス成形
することを特徴とする突き合わせ溶接板のプレス成形方
法。6. A plate having a different thickness or tensile strength,
Press forming including overhang forming of a blank plate butt-welded by a laser or an electron beam, wherein the butt positions of the plate materials are arranged across the convex or concave shape of the punch bottom, and the punch or die profile of the uneven portion is formed. The uneven shape in which the ratio of the height of the uneven shape to the radius of curvature is 0.4 or more, the butt position of the plate material is arranged across, and the product of the plate thickness and strength of the butt-welded blank plate is large. In the press forming where the butting position is not located beyond the center of the radius of curvature of the convex or concave shape at the bottom of the punch, the strength and sheet thickness fall within the range of the product of the strength and sheet thickness of each butted plate. And press-forming using a blank material which is butt-welded by inserting at least one sheet material having a product of Forming method of butt weld plate.
接板のプレス成形方法において、 板厚あるいは引張り強度の異なる板の間に挿まれる板材
は、板厚と強度の積が小さい方の板材の板厚と強度の積
の０．７７倍を超えない範囲であることを特徴とする突
き合わせ溶接板のプレス成形方法。7. The method of press-forming a butt welded plate according to claim 5, wherein the plate inserted between plates having different thicknesses or tensile strengths is a plate having a smaller product of the thickness and the strength. A method for press-forming a butt weld plate, wherein the thickness does not exceed 0.77 times the product of thickness and strength.
合わせ溶接板のプレス成形方法において、 板厚あるいは引張り強度の異なる板の間に挿まれる板材
の幅は、５〜２５ｍｍの範囲であることを特徴とする突
き合わせ溶接板のプレス成形方法。8. The method for press-forming a butt welded plate according to claim 5, wherein the width of the plate inserted between the plates having different thicknesses or tensile strengths is in a range of 5 to 25 mm. A press forming method for a butt weld plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9265302A JPH11104750A (en) | 1997-09-30 | 1997-09-30 | Press forming method for abutt welding board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9265302A JPH11104750A (en) | 1997-09-30 | 1997-09-30 | Press forming method for abutt welding board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11104750A true JPH11104750A (en) | 1999-04-20 |
Family
ID=17415321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9265302A Pending JPH11104750A (en) | 1997-09-30 | 1997-09-30 | Press forming method for abutt welding board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11104750A (en) |
Cited By (18)
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|---|---|---|---|---|
| JP2001001062A (en) * | 1999-06-23 | 2001-01-09 | Nippon Steel Corp | Press forming method of dissimilar material tailored blank excellent in formability |
| JP2002102946A (en) * | 2000-09-25 | 2002-04-09 | Nippon Steel Corp | Tailored blank material exellent in deep drawability and its manufacturing method |
| JP2002274177A (en) * | 2001-03-21 | 2002-09-25 | Nishikawa Rubber Co Ltd | Panel door with drain function |
| JP2002326589A (en) * | 2001-04-27 | 2002-11-12 | Honda Motor Co Ltd | Method of forming body panel |
| JP2002331317A (en) * | 2001-04-27 | 2002-11-19 | Honda Motor Co Ltd | Blank member for auto body panel |
| JP2003072375A (en) * | 2001-09-04 | 2003-03-12 | Honda Motor Co Ltd | Sash door for automobile and manufacturing method thereof |
| JP2003080321A (en) * | 2001-09-06 | 2003-03-18 | Honda Motor Co Ltd | Method and device for press-forming assembled blank material |
| KR20030050962A (en) * | 2001-12-20 | 2003-06-25 | 주식회사 엠에스 오토텍 | Door Inner Panel Manufacturing Method of Vehicle |
| CN1292854C (en) * | 2003-11-27 | 2007-01-03 | 日产自动车株式会社 | Press-forming method, press-forming machine and press-formed product |
| KR100692723B1 (en) | 2005-07-26 | 2007-03-09 | 현대자동차주식회사 | Method for manufacturing center pillar of vehicle using simultaneous hot stamping |
| JP2007509797A (en) * | 2003-10-30 | 2007-04-19 | ティッセンクルップ スチール アクチェンゲゼルシャフト | Method for producing sheet metal plates, especially made of steel, for the production of automotive body parts |
| US7377503B2 (en) | 2004-03-31 | 2008-05-27 | Nissan Motor Co., Ltd. | Clamp device |
| US7959212B2 (en) * | 2008-08-21 | 2011-06-14 | GM Global Technology Operations LLC | Welded blank for vehicle door panel |
| JP2017170506A (en) * | 2016-03-25 | 2017-09-28 | 新日鐵住金株式会社 | Manufacturing method of panel-like formed product |
| WO2017200006A1 (en) * | 2016-05-18 | 2017-11-23 | 新日鐵住金株式会社 | Method of manufacturing press-formed article, and manufacturing line |
| CN109759522A (en) * | 2018-04-12 | 2019-05-17 | 山东建筑大学 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
| JP2021031745A (en) * | 2019-08-27 | 2021-03-01 | 株式会社神戸製鋼所 | Low-strength hot stamping steel sheet, hot stamp component, and method for manufacturing hot stamp component |
| WO2022230836A1 (en) * | 2021-04-28 | 2022-11-03 | 日本製鉄株式会社 | Weld bead width design method for tailored blank material, manufacturing method, manufacturing system, weld bead width design system, vehicular structural member, and tailored blank material |
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1997
- 1997-09-30 JP JP9265302A patent/JPH11104750A/en active Pending
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4520549B2 (en) * | 1999-06-23 | 2010-08-04 | 新日本製鐵株式会社 | Press forming method of different material tailored blanks with excellent formability |
| JP2001001062A (en) * | 1999-06-23 | 2001-01-09 | Nippon Steel Corp | Press forming method of dissimilar material tailored blank excellent in formability |
| JP2002102946A (en) * | 2000-09-25 | 2002-04-09 | Nippon Steel Corp | Tailored blank material exellent in deep drawability and its manufacturing method |
| JP4532709B2 (en) * | 2000-09-25 | 2010-08-25 | 新日本製鐵株式会社 | Tailored blank material excellent in deep drawability and manufacturing method thereof |
| JP2002274177A (en) * | 2001-03-21 | 2002-09-25 | Nishikawa Rubber Co Ltd | Panel door with drain function |
| JP4558230B2 (en) * | 2001-03-21 | 2010-10-06 | 西川ゴム工業株式会社 | Panel door with drainage function |
| JP2002326589A (en) * | 2001-04-27 | 2002-11-12 | Honda Motor Co Ltd | Method of forming body panel |
| JP2002331317A (en) * | 2001-04-27 | 2002-11-19 | Honda Motor Co Ltd | Blank member for auto body panel |
| JP4668454B2 (en) * | 2001-04-27 | 2011-04-13 | 本田技研工業株式会社 | Forming method for body panel |
| JP2003072375A (en) * | 2001-09-04 | 2003-03-12 | Honda Motor Co Ltd | Sash door for automobile and manufacturing method thereof |
| 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 |
| KR20030050962A (en) * | 2001-12-20 | 2003-06-25 | 주식회사 엠에스 오토텍 | Door Inner Panel Manufacturing Method of Vehicle |
| JP2007509797A (en) * | 2003-10-30 | 2007-04-19 | ティッセンクルップ スチール アクチェンゲゼルシャフト | Method for producing sheet metal plates, especially made of steel, for the production of automotive body parts |
| US7568272B2 (en) | 2003-11-27 | 2009-08-04 | Nissan Motor Co., Ltd. | Press-forming method, press-forming machine and press-formed product |
| CN1292854C (en) * | 2003-11-27 | 2007-01-03 | 日产自动车株式会社 | Press-forming method, press-forming machine and press-formed product |
| US7377503B2 (en) | 2004-03-31 | 2008-05-27 | Nissan Motor Co., Ltd. | Clamp device |
| US7753351B2 (en) | 2004-03-31 | 2010-07-13 | Nissan Motor Co., Ltd. | Clamp device |
| KR100692723B1 (en) | 2005-07-26 | 2007-03-09 | 현대자동차주식회사 | Method for manufacturing center pillar of vehicle using simultaneous hot stamping |
| US7959212B2 (en) * | 2008-08-21 | 2011-06-14 | GM Global Technology Operations LLC | Welded blank for vehicle door panel |
| JP2017170506A (en) * | 2016-03-25 | 2017-09-28 | 新日鐵住金株式会社 | Manufacturing method of panel-like formed product |
| WO2017200006A1 (en) * | 2016-05-18 | 2017-11-23 | 新日鐵住金株式会社 | Method of manufacturing press-formed article, and manufacturing line |
| JPWO2017200006A1 (en) * | 2016-05-18 | 2018-05-31 | 新日鐵住金株式会社 | Production method and production line for press-formed products |
| US10744547B2 (en) | 2016-05-18 | 2020-08-18 | Nippon Steel Corporation | Method of producing press-formed product |
| CN109759522A (en) * | 2018-04-12 | 2019-05-17 | 山东建筑大学 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
| JP2021031745A (en) * | 2019-08-27 | 2021-03-01 | 株式会社神戸製鋼所 | Low-strength hot stamping steel sheet, hot stamp component, and method for manufacturing hot stamp component |
| WO2022230836A1 (en) * | 2021-04-28 | 2022-11-03 | 日本製鉄株式会社 | Weld bead width design method for tailored blank material, manufacturing method, manufacturing system, weld bead width design system, vehicular structural member, and tailored blank material |
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