WO2022239340A1 - プレス成形方法 - Google Patents
プレス成形方法 Download PDFInfo
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- WO2022239340A1 WO2022239340A1 PCT/JP2022/005594 JP2022005594W WO2022239340A1 WO 2022239340 A1 WO2022239340 A1 WO 2022239340A1 JP 2022005594 W JP2022005594 W JP 2022005594W WO 2022239340 A1 WO2022239340 A1 WO 2022239340A1
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- WO
- WIPO (PCT)
- Prior art keywords
- press
- punch
- vertical wall
- formed product
- bending
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000005452 bending Methods 0.000 claims description 220
- 238000000465 moulding Methods 0.000 claims description 56
- 238000010586 diagram Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 12
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 238000004088 simulation Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000037303 wrinkles Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 2
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
Definitions
- Vertical wall portion 133, flange portion 135 continuous from the lower end of vertical wall portion 133, punch shoulder R portion 137 connecting top plate portion 131 and vertical wall portion 133, vertical wall portion 133 and flange portion 135 and a connecting shoulder part of a die 139 are examples of a press-formed product 130 having a hat cross-sectional shape as shown as an example in FIG.
- press-formed products are manufactured by crash forming (bend forming) or deep drawing (draw forming), and are mainly used as reinforcing members for automobiles.
- a high-strength metal plate is used.
- the higher the strength of the metal plate the lower the indicators of formability such as material ductility and stretch-flangeability.
- a curved portion that is concavely curved along the longitudinal direction such as a substantially L-shape or a substantially T-shape, is used.
- the vertical wall portion of the curved portion becomes stretch-flange deformation and fracture is likely to occur.
- press-formed products having a U-shaped cross section or a hat cross-sectional shape that is concavely or convexly curved when viewed from the top
- press-formed products in which the vertical wall portion has a particularly long vertical wall length and a high molding height In order to prevent cracks and wrinkles by alleviating the tensile stress and compressive stress generated during the press forming process, press forming is generally performed in multiple steps.
- the target shape is a press-formed product 120 having a U-shaped cross section shown in FIG. 12(a), as shown in FIG.
- a press-formed product 110 before bending back and having a hat cross-sectional shape with a short length 113, that is, a low forming height, is press-formed (shallow drawing) (Fig. 3(a)).
- the flange portion 115 of the press-formed product 110 before unbending is bent back to form the vertical wall portion 123 having a desired vertical wall length, and the press-formed product 120 having a high forming height is press-formed (list Like molding) (Fig. 3(b)).
- resistance spot welding may become difficult as shown in FIG. That is, in resistance spot welding, the vertical wall portion 123 of the press-formed product 120 or the vertical wall portion 133 of the press-formed product 130 is overlapped with the flat surface portion 151 of another flat component, and pressure is applied from both sides by the electrodes 153. Then, a large current is applied for a short period of time to create a weld part 155 (weld nugget) to join the metals together.
- a die having two second convex portions provided so as to make contact with the central first convex portion of the three first convex portions from the convex side of the bending habit There is a technique of correcting the bending habit by pushing the punch close to the die side in a state where it is bent, and giving a local small deformation to the bending habit by the first convex part of the punch and the second convex part of the die. disclosed.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a flange of a press-formed product having a hat cross-sectional shape before unbending without requiring a step of correcting the bending tendency using a special device. It is an object of the present invention to provide a press forming method capable of reducing the magnitude of the bending habit remaining in a vertical wall portion of a press-formed product formed by bending back a portion to form a vertical wall portion.
- a press forming method includes a top plate portion, a vertical wall portion continuing from the top plate portion while being inclined with respect to the press forming direction, and a flange continuing from the vertical wall portion via a die shoulder R portion.
- a press-formed product having a hat cross-sectional shape before bending back and having a portion is press-formed into a press-formed product in which the vertical wall portion is formed by bending back the flange portion using a punch and a die, wherein the The punch has a top forming surface portion for forming the top plate portion of the press-formed product having the same shape as the top plate portion of the press-formed product before unbending, and a vertical portion for forming the vertical wall portion.
- the punch ridge is preferably formed at a position that satisfies the following formula.
- FIG. 5 shows the mechanism by which the vertical wall portion 123 of the press-formed product 120 forms the bent portion 127 .
- FIG. 5(a) is a diagram showing the relative positional relationship between the punch 41 and the die 43 of the press molding die 40
- FIGS. 5(b) to 5(d) are molding start positions.
- 5(e) is a diagram showing the deformation behavior of the die shoulder R portion 119 of the press-formed product 110 before bending back and its surroundings in the forming process from the position of the press-forming die 40 to the position of the forming bottom dead center.
- the punch-side second inclined surface portion 11c is closer to the top plate molding surface portion 11e than the punch ridgeline portion 11d. becomes. Therefore, when the die 13 of the press-molding die 10 is relatively moved parallel to the press-molding direction, the punch-side second inclined surface portion 11c and the die-side second inclined surface portion 13c at the molding bottom dead center position Since the vertical gap between the ends of the bent portion 127 is widened and the bent back flange portion 115 cannot be restrained sufficiently, the effect of reducing the height of the bent portion 127 is also saturated.
- the die-side first inclined surface portion 13b and the die-side second inclined surface portion 13c are aligned with each other. It is preferable that the first inclined surface portion 11b and the punch side second inclined surface portion 11c are opposed to each other with a predetermined gap in the vertical direction. As shown in FIG. 1(b) at the bottom dead center position, this narrows the space between the punch 11 and the die 13 in which the vertical wall portion 113 can be freely deformed, so that the vertical wall portion 113 can be restrained. Therefore, the shapes of the punch-side first inclined surface portion 11b, the punch-side second inclined surface portion 11c, the die-side first inclined surface portion 13b, and the die-side second inclined surface portion 13c can be easily transferred.
- the description of the press-forming method according to the present embodiment is directed to a U-shaped cross-sectional shape obtained by bending back all of the flange portion 115 of the press-formed product 110 having a hat cross-sectional shape before bending back to form a part of the vertical wall portion 123.
- the present invention as shown in FIG. A press-formed product 130 having a hat cross-sectional shape, which is part of the wall portion 133 and the remaining portion of the flange portion 115 is a new flange portion 135, may be press-formed.
- the size (height of the bending peak) of the bending habit portion 141 remaining in the vertical wall portion 133 of the press-formed product 130 having a hat cross section can be reduced.
- the target shape is a press-formed product that is curved along the longitudinal direction in a top view
- the size of the bending habit portion remaining in the vertical wall portion of the press-formed product (height of the bending habit peak)
- cracks due to stretch flange forming and wrinkles due to shrink flange forming in a curved press-formed product can be suppressed.
- the types of automobile parts include A pillars, B pillars, roof rails, and side rails that use high-strength metal plates. (side rail), front side member (front side member), rear side member (rear side member), cross member (cross member) and other frame parts, and the like.
- the target shape of the press-formed product 110 before unbending is 50 mm for the forming height h, 50 mm for the length lT of the top plate portion 111, 3° for the inclination angle ⁇ of the vertical wall portion 113, and WF for the width of the flange portion 115. is 50 mm, and the bending radius of the punch shoulder R portion 117 and the bending radius of the die shoulder R portion 119 are both 10 mm.
- the dimensions of the punch and die used in the first forming step were set so as to correspond to the target shape of the press-formed product before unbending.
- the dimensions of the press-molding die 10 are as follows: the width of the top plate molding surface portion 11e of the punch 11 is 50 mm; was set to 3°, which is equal to the inclination angle ⁇ of the vertical wall portion 113 of .
- the peak height of the bending habit portion 127 generated in the vertical wall portion 123 of the press-formed product 120 formed in the second forming step was calculated.
- the height of the bending peak is the maximum value of the distance to the surface of the bending portion 127 in the direction perpendicular to the vertical wall portion 123 .
- the press-forming simulation is performed by changing the inclination angle ⁇ of the punch-side second inclined surface portion 11c and the position of the punch ridge line portion 11d of the punch 11 used for press-forming the press-formed product 120.
- the effect of reducing the height of the bending habit crest was examined.
- a press-formed product 120 in which the flange portion 115 of the pre-bend-back press-formed product 110 is bent back to form a part of the vertical wall portion 123 using the conventional press-molding die 40 shown in FIG. was press-molded as Comparative Example 1, and the height of the bending habit portion 127 was obtained in the same manner as in Invention Examples 1-1 to 1-3.
- Table 1 shows the bending habit peak height results of the press-formed products 120 in Invention Examples 1-1 to 1-4 and Comparative Example 1.
- the press-formed product 120 can be press-formed by bending back the flange portion of the press-formed product 110 before unbending.
- the inclination angle of the punch-side second inclined surface portion 11c inward from the direction of the punch-side first inclined surface portion 11b is within the range of the inclination angle ⁇ of the punch-side first inclined surface portion 11b outward from the press forming direction.
- ⁇ 3°, respectively, as Invention Examples 2-1, 2-2, and 2-3.
- Table 2 shows the bending habit peak height results of the press-formed products 120 in Invention Examples 2-1 to 2-5 and Comparative Example 1 described above.
- the position of the punch ridge line portion 11d is outside the preferred range of the present invention.
- the punch ridge line portion 11d is set on the tip side of the flange portion 115 from the flange side plastic bending deformation region 115a.
- the height of the bending habit crest in Invention Examples 2-4 and 2-5 is both 1.45 mm, which is smaller than the height of the bending habit crest in Comparative Example 1, but larger than that of Invention Examples 2-1 to 2-3. .
- a press having a punch having a punch-side first inclined surface portion, a punch-side second inclined surface portion, and a punch ridge line portion, and a die having a flange bend-back portion
- a molding die (not shown)
- a part of the flange portion 115 of the press-formed product 110 before unbending on the side of the vertical wall portion 113 is bent back to form a vertical wall portion 133, and the vertical wall portion 113 and the vertical wall portion 113 of the flange portion 115 are formed.
- Inventive Example 3 was obtained by press-molding a press-molded product 130 having a hat cross-sectional shape with a flange portion 135 on the opposite side.
- Other conditions regarding the target shape of the press-molded product 130 and the dimensions of the press-molding die were the same as in the first embodiment described above.
- a press-formed product having a hat cross-sectional shape before bending back is bent back to form a vertical wall portion without requiring a step of correcting the bending tendency using a special device. It is possible to provide a press forming method capable of reducing the magnitude of the bending habit remaining in the vertical wall portion.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
発明者らは、図4に示すようにパンチ41とダイ43とを備えたプレス成形用金型40を用いて、図3(a)に一例として示すように、天板部111と縦壁部113とフランジ部115とを有するハット断面形状の曲げ戻し前プレス成形品110のフランジ部115を曲げ戻し、図3(b)に一例として示すように、縦壁部123の一部としたプレス成形品120にリストライクする過程を対象とし、縦壁部123に曲げ癖部127(図13(a)参照)が発生するメカニズムについて検討した。
発明者は、曲げ戻し前プレス成形品110のフランジ部115を曲げ戻したプレス成形品120の縦壁部123に曲げ癖部127が発生するメカニズムに関する上記検討に基づいて、プレス成形品120に生じる曲げ癖部127の大きさ(曲げ癖山高さ)を低減する方法についてさらに検討した。
本発明の実施の形態に係るプレス成形方法は、図3(a)に示すように、天板部111と、天板部111からプレス成形方向に対して傾斜して連続する縦壁部113と、縦壁部113からダイ肩R部119を介して連続するフランジ部115と、を有するハット断面形状の曲げ戻し前プレス成形品110を、図1及び図2に一例として示すようなパンチ11とダイ13を備えたプレス成形用金型10を用いてフランジ部115を曲げ戻し、図3(b)に一例として示すような縦壁部123を形成したプレス成形品120をプレス成形するものである。
次に、本実施の形態に係るプレス成形方法により、プレス成形品120の縦壁部123に発生する曲げ癖部127の大きさを低減することができる理由について説明する。
図8は、本実施の形態に係るプレス成形方法で用いるパンチ11のパンチ稜線部11dの位置(11d)を変更した場合の、プレス成形品120の縦壁部123の断面形状を模式的に示した図である。ここで、図8(a)は、従来のパンチ41を用いた場合、図8(b)はパンチ11のパンチ稜線部11dをダイ肩R部119に当接させた場合、図8(c)及び図8(d)は曲げ癖部127が発生する領域の外側にパンチ稜線部11dを当接させた場合であり、図8(b)~図8(d)における白抜き矢印はパンチ稜線部11dを当接させる位置を示している。
l1=2πR1×(90°-α)/360° ・・・式(1)
l2=R1×1/2 ・・・式(2)
l3=R1×1/2 ・・・式(3)
hs=h1-R1・(1-sinα)-R1×1/2 ・・・式(5)
he=h1-R1・(1-sinα)+2πR1×(90°-α)/360°+R1×1/2 ・・・式(6)
h1-R1(1-sinα)-R1/2 ≦ h2 ≦ h1-R1(1-sinα)+2πR1(90-α)/360+R1/2 ・・・式(7)
図10(a)は、パンチ側第1傾斜面部11bのプレス成形方向に対する傾斜角度αを10°とし、パンチ側第2傾斜面部11cの傾斜角度βを10°とし、さらに、β×1/2(=5°)及びβ×1/4(=2.5°)にした場合において、パンチ稜線部11dの位置を曲げ癖部が発生する縦壁側塑性曲げ変形領域113a、ダイ肩R部119及びフランジ側塑性曲げ変形領域115a内で変更したときの曲げ癖山高さを、従来のパンチ41を用いてプレス成形したプレス成形品120における曲げ癖部127の曲げ癖山高さha(図7(a)の表面形状プロフィールAを参照)を100%としたときの比率で示した図である。図10(b)~図10(d)は、図10(a)中のプロット(b)~(d)の曲げ癖部127のパンチ側の表面形状プロフィールを示した図である。そして、図10(b)~図10(d)の横軸(X方向)、縦軸(Y方向)、A、B及びCは、前述した図7と同様である。
ここで、図1及び図2に示すプレス成形用金型10において、パンチ11とダイ13とのクリアランスは、ブランク(blank)の板厚の0%以上50%以下となるように、パンチ11とダイ13とを設置することが好ましい。パンチ11とダイ13のクリアランスとは、パンチ側第1傾斜面部とダイ側第1傾斜面部との垂直方向距離、及び、パンチ側第2傾斜面部とダイ側第2傾斜面部の垂直方向距離を前記板厚で除して100を乗じて算出される値(%)のことをいう。
本実施例では、まず、第2成形工程で用いるパンチ11のパンチ側第2傾斜面部11cの傾斜角度βを変更し、曲げ癖部の曲げ癖山高さを検討した。
次に、第2成形工程で用いるパンチ11のパンチ稜線部11dの位置を本発明の好適範囲内で変更した場合についてプレス成形シミュレーションを行い、曲げ癖部の曲げ癖山高さを求めた。
11 パンチ
11a パンチ側縦壁成形面部
11b パンチ側第1傾斜面部
11c パンチ側第2傾斜面部
11d パンチ稜線部
11e 天板成形面部
13 ダイ
13a ダイ側縦壁成形面部
13b ダイ側第1傾斜面部
13c ダイ側第2傾斜面部
13d フランジ曲げ戻し部
13e フランジ成形面部
13f ダイ肩部
40 プレス成形用金型
41 パンチ
41a パンチ側縦壁成形面部
43 ダイ
43a ダイ側縦壁成形面部
43b フランジ曲げ戻し部
110 曲げ戻し前プレス成形品
111 天板部
113 縦壁部
113a 縦壁側塑性曲げ変形領域
115 フランジ部
115a フランジ側塑性曲げ変形領域
117 パンチ肩R部
119 ダイ肩R部
120 プレス成形品
121 天板部
123 縦壁部
125 パンチ肩R部
127 曲げ癖部
127a ダイ肩R相当部
127b 縦壁側塑性曲げ変形部
127c フランジ側塑性曲げ変形部
127d 境界
127e 境界
130 プレス成形品
131 天板部
133 縦壁部
135 フランジ部
137 パンチ肩R部
139 ダイ肩R部
141 曲げ癖部
151 平坦面部
153 電極
155 溶接部
Claims (3)
- 天板部と、該天板部からプレス成形方向に対して傾斜して連続する縦壁部と、該縦壁部からダイ肩R部を介して連続するフランジ部と、を有するハット断面形状の曲げ戻し前プレス成形品を、パンチとダイとを用いて前記フランジ部を曲げ戻して縦壁部を形成したプレス成形品のプレス成形方法であって、
前記パンチは、
前記曲げ戻し前プレス成形品の前記天板部と同形状の前記プレス成形品の天板部を成形する天板成形面部と、前記縦壁部を成形する縦壁成形面部とを有し、
該縦壁成形面部は、前記天板成形面部から連続して外側に傾斜し、プレス成形方向に対する傾斜角度が前記曲げ戻し前プレス成形品の前記縦壁部の傾斜角度と等しいパンチ側第1傾斜面部と、該パンチ側第1傾斜面部の下端側から連続して該パンチ側第1傾斜面部よりも内側に傾斜するパンチ側第2傾斜面部とを有し、前記パンチ側第1傾斜面部と前記パンチ側第2傾斜面部とが外側に凸となる山形状を呈すると共にその接続部にパンチ稜線部が形成され、
前記ダイは、
前記パンチに載置した前記曲げ戻し前プレス成形品の前記フランジ部を曲げ戻すフランジ曲げ戻し部を有し、
前記パンチに前記曲げ戻し前プレス成形品を載置して前記ダイを前記パンチ側に相対移動させ、前記縦壁部の内面側に前記パンチ稜線部を当接させながら前記フランジ曲げ戻し部により前記フランジ部を曲げ戻し、前記プレス成形品の前記縦壁部を形成する、プレス成形方法。 - 前記ダイは、パンチ外面に平行なクリアランスを保持した内面形状を有する、請求項1に記載のプレス成形方法。
- 前記パンチ稜線部は、下式を満足する位置に形成されている、請求項1又は2に記載のプレス成形方法。
h1-R1(1-sinα)-R1/2 ≦ h2 ≦ h1-R1(1-sinα)+2πR1(90-α)/360+R1/2
ここで、h2は、前記パンチの前記天板成形面部から前記パンチ稜線部までのプレス成形方向における距離(mm)、h1は、前記曲げ戻し前プレス成形品の成形高さ(mm)、R1は、前記曲げ戻し前プレス成形品のダイ肩R部の曲げ半径(mm)、αは、前記曲げ戻し前プレス成形品の前記縦壁部のプレス成形方向に対する傾斜角度(°)を示す。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22807047.0A EP4321269A1 (en) | 2021-05-12 | 2022-02-14 | Press forming method |
KR1020237038187A KR20230165915A (ko) | 2021-05-12 | 2022-02-14 | 프레스 성형 방법 |
CN202280033923.XA CN117295565A (zh) | 2021-05-12 | 2022-02-14 | 冲压成形方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2021-080775 | 2021-05-12 | ||
JP2021080775A JP7099587B1 (ja) | 2021-05-12 | 2021-05-12 | プレス成形方法 |
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EP (1) | EP4321269A1 (ja) |
JP (1) | JP7099587B1 (ja) |
KR (1) | KR20230165915A (ja) |
CN (1) | CN117295565A (ja) |
WO (1) | WO2022239340A1 (ja) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2663701B2 (ja) * | 1990-10-12 | 1997-10-15 | 日産自動車株式会社 | プレス型 |
JP2008284576A (ja) * | 2007-05-16 | 2008-11-27 | Wuu Shiang Industrial Co Ltd | 高張力鋼板のプレス成形加工方法及びプレス加工設備 |
JP2013103226A (ja) | 2011-11-10 | 2013-05-30 | Jfe Steel Corp | 板金の曲げ癖矯正装置 |
JP6094699B2 (ja) * | 2015-04-22 | 2017-03-15 | 新日鐵住金株式会社 | プレス成形品の製造方法、プレス成形品及びプレス装置 |
JP2021164954A (ja) * | 2020-04-08 | 2021-10-14 | Jfeスチール株式会社 | プレス部品の製造方法、曲げ戻し用の金型、プレス部品の成形方法及び高強度鋼板 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7271569B2 (en) * | 2004-09-21 | 2007-09-18 | Motorola Inc. | Contact less charger with alignment indicator |
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2021
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2022
- 2022-02-14 EP EP22807047.0A patent/EP4321269A1/en active Pending
- 2022-02-14 CN CN202280033923.XA patent/CN117295565A/zh active Pending
- 2022-02-14 WO PCT/JP2022/005594 patent/WO2022239340A1/ja active Application Filing
- 2022-02-14 KR KR1020237038187A patent/KR20230165915A/ko unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2663701B2 (ja) * | 1990-10-12 | 1997-10-15 | 日産自動車株式会社 | プレス型 |
JP2008284576A (ja) * | 2007-05-16 | 2008-11-27 | Wuu Shiang Industrial Co Ltd | 高張力鋼板のプレス成形加工方法及びプレス加工設備 |
JP2013103226A (ja) | 2011-11-10 | 2013-05-30 | Jfe Steel Corp | 板金の曲げ癖矯正装置 |
JP6094699B2 (ja) * | 2015-04-22 | 2017-03-15 | 新日鐵住金株式会社 | プレス成形品の製造方法、プレス成形品及びプレス装置 |
JP2021164954A (ja) * | 2020-04-08 | 2021-10-14 | Jfeスチール株式会社 | プレス部品の製造方法、曲げ戻し用の金型、プレス部品の成形方法及び高強度鋼板 |
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EP4321269A1 (en) | 2024-02-14 |
KR20230165915A (ko) | 2023-12-05 |
JP2022174802A (ja) | 2022-11-25 |
JP7099587B1 (ja) | 2022-07-12 |
CN117295565A (zh) | 2023-12-26 |
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