JP2021020236A - Molding die and press-molding method using the same - Google Patents

Molding die and press-molding method using the same Download PDF

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JP2021020236A
JP2021020236A JP2019137771A JP2019137771A JP2021020236A JP 2021020236 A JP2021020236 A JP 2021020236A JP 2019137771 A JP2019137771 A JP 2019137771A JP 2019137771 A JP2019137771 A JP 2019137771A JP 2021020236 A JP2021020236 A JP 2021020236A
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中田茂夫
Shigeo Nakada
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Abstract

To provide a molding die in which cracking hardly occurs in a metallic plate material and wrinkles hardly occur on the metallic plate material, when molding the metallic plate material.SOLUTION: A molding die 1 comprises: a die 2 including a concavity 21; a punch 3 with a protrusion 31; and a first member 4 having an open hole 41 and arranged between the die 2 and the punch 3. The molding die 1 is intended for press-molding a metallic plate material 10 arranged between the die 2 and the first member 4 by inserting the protrusion 31 to the open hole 41 and the concavity 21. The first member 4 has elevated portions 42 that are elevated to be lower than the protrusion 31 at a peripheral edge part of the open hole 41. The die 2 includes depressed portions 22 that are fitted to the elevated portions 42 and recessed to be shallower than the concavity 21. The molding die 1 has second members 5 for adjusting a gap between the first member 4 and the die 2 to a thickness equal to or more than that of the metallic plate material 10, outward from the elevated portions 42 and the depressed portions 22.SELECTED DRAWING: Figure 1

Description

本発明は、成形金型及びそれを用いるプレス成形方法に関する。 The present invention relates to a molding die and a press molding method using the molding die.

燃費の向上を追求する目的で、自動車の車体の軽量化が近年進められている。その為、車体に従来から使用されていた鋼板に替えて、鋼板よりも軽量なアルミニウム板材が採用されることが多くなってきている。しかし、アルミニウム板材は鋼板よりも成形性が劣る材料であるため、鋼板に使用されていた従来の成形金型を用いて、このアルミニウム板材を成形しようとすると、プレス成形時にアルミニウム板材に割れが発生することがある。特許文献１には、この割れの発生を回避するために、アルミニウム板材の把持力を低くしたプレス型のブランクホルダーが記載されている。 In recent years, weight reduction of automobile bodies has been promoted for the purpose of pursuing improvement in fuel efficiency. Therefore, instead of the steel plate conventionally used for the vehicle body, an aluminum plate material which is lighter than the steel plate is often adopted. However, since the aluminum plate material is inferior in formability to the steel plate, when an attempt is made to mold this aluminum plate material using the conventional molding die used for the steel plate, the aluminum plate material cracks during press molding. I have something to do. Patent Document 1 describes a press-type blank holder in which the gripping force of the aluminum plate material is reduced in order to avoid the occurrence of this crack.

また特許文献２には、絞り成形時にダイとブランクホルダーとを嵌合させてアルミニウム板材にビードを形成し、アルミニウム板材における該ビードよりも外方部分はダイとブランクホルダーとで挟持しない絞り成形装置が記載されている。 Further, Patent Document 2 describes a draw forming apparatus in which a die and a blank holder are fitted to each other during drawing forming to form a bead on an aluminum plate material, and a portion of the aluminum plate material outside the bead is not sandwiched between the die and the blank holder. Is described.

特開昭４８−４９６６０号公報JP-A-48-49660 特開２０１４−５０８５７号公報Japanese Unexamined Patent Publication No. 2014-50857

特許文献１に記載のプレス型のブランクホルダーは、アルミニウム板材の把持力が低い結果、アルミニウム板材に皺が発生してしまう。次に特許文献２に記載の絞り成形装置は、アルミニウム板材をビードにおいてダイとブランクホルダーとで挟持している。その結果、アルミニウム板材におけるビードよりも外側部分を、該ビードよりも内側に流入させることができず、アルミニウム板材に割れが発生してしまう。 In the press-type blank holder described in Patent Document 1, as a result of the low gripping force of the aluminum plate material, wrinkles are generated in the aluminum plate material. Next, in the draw forming apparatus described in Patent Document 2, an aluminum plate material is sandwiched between a die and a blank holder in a bead. As a result, the portion of the aluminum plate material outside the bead cannot flow inward from the bead, and the aluminum plate material is cracked.

したがって本発明の課題は、金属製の板材を成形するときに、金属製の板材に割れが発生し難く、金属製の板材に皺が発生し難い成形金型を提供することにある。またそれを用いるプレス成形方法を提供することにある。 Therefore, an object of the present invention is to provide a molding die in which cracks are less likely to occur in a metal plate material and wrinkles are less likely to occur in the metal plate material when molding a metal plate material. Another object of the present invention is to provide a press molding method using the same.

本発明は、凹部を有するダイ、凸部を有するパンチ、該凹部の輪郭に一致する形状の貫通口を有し且つ該ダイと該パンチとの間に配される第１部材を備え、該ダイ及び該第１部材の間に配された金属製の板材に対して、該凸部を該貫通口及び該凹部に挿通してプレス成形する成形金型であって、
前記第１部材は、前記貫通口の周縁部に前記凸部よりも低く***する***部を有し、
前記ダイは、前記***部に嵌合し且つ前記凹部よりも浅く窪んだ凹陥部を該凹部の周縁部に有し、
前記成形金型は、前記***部及び前記凹陥部から外方に、前記第１部材と前記ダイとの間隔を、前記金属製の板材の厚み以上に調整する第２部材を有している、成形金型を提供するものである。 The present invention comprises a die having a concave portion, a punch having a convex portion, a first member having a through hole having a shape matching the contour of the concave portion and being arranged between the die and the punch, and the die. A molding die for press-molding a metal plate material arranged between the first member by inserting the convex portion into the through hole and the concave portion.
The first member has a raised portion that rises lower than the convex portion at the peripheral edge portion of the through port.
The die has a recessed portion that fits into the raised portion and is recessed shallower than the recessed portion at the peripheral edge of the recessed portion.
The molding die has a second member that adjusts the distance between the first member and the die to be equal to or greater than the thickness of the metal plate material outward from the raised portion and the recessed portion. It provides a molding die.

また本発明は、凹部を有するダイ、凸部を有するパンチ、該凹部の輪郭に一致する形状の貫通口を有し且つ該ダイと該パンチとの間に配される第１部材を備え、
前記第１部材は、前記貫通口の周縁部に前記凸部よりも低く***する***部を有し、
前記ダイは、前記***部に嵌合し且つ前記凹部よりも浅く窪んだ凹陥部を該凹部の周縁部に有し、
前記***部及び前記凹陥部から外方に、前記第１部材と前記ダイとの間の距離を調整する第２部材を有する成形金型を用いるプレス成形方法であって、
金属製の板材を前記ダイと前記第１部材とで挟んだときに、前記第２部材によって該第１部材と該ダイとの間の距離を該金属製の板材の厚み以上に調整しつつ、前記凹陥部と前記***部とを嵌合させ該金属製の板材を変形させて該金属製の板材の周縁部に仮屈曲部を形成する工程と、
前記凸部を前記貫通口及び前記凹部に挿通して前記金属製の板材をプレス成形するときには、先ず前記***部に前記仮屈曲部を係合させ、該金属製の板材における該仮屈曲部から外方部分の前記凹部側への移動を防ぎながらプレス成形し、
その後、前記凹陥部よりも深くプレス成形するときには、前記仮屈曲部を延ばしながら前記***部から内方に前記金属製の板材の周縁部を越えさせ、該周縁部を前記凹部内に流入させつつプレス成形する工程とを備える、プレス成形方法を提供するものである。 The present invention also includes a die having a concave portion, a punch having a convex portion, and a first member having a through hole having a shape matching the contour of the concave portion and arranged between the die and the punch.
The first member has a raised portion that rises lower than the convex portion at the peripheral edge portion of the through port.
The die has a recessed portion that fits into the raised portion and is recessed shallower than the recessed portion at the peripheral edge of the recessed portion.
A press molding method using a molding die having a second member for adjusting the distance between the first member and the die outward from the raised portion and the recessed portion.
When the metal plate material is sandwiched between the die and the first member, the second member adjusts the distance between the first member and the die to be equal to or greater than the thickness of the metal plate material. A step of fitting the recessed portion and the raised portion and deforming the metal plate material to form a temporary bent portion on the peripheral edge portion of the metal plate material.
When the convex portion is inserted into the through hole and the concave portion to press-mold the metal plate material, the temporary bending portion is first engaged with the raised portion, and the temporary bending portion in the metal plate material is used. Press-mold while preventing the outer part from moving to the concave side,
After that, when press-molding deeper than the recessed portion, the temporarily bent portion is extended and the peripheral edge portion of the metal plate material is made to pass inward from the raised portion, and the peripheral edge portion is allowed to flow into the recessed portion. It provides a press molding method including a step of press molding.

本発明によれば、金属製の板材を成形するときに、金属製の板材に割れが発生し難く、金属製の板材に皺が発生し難い成形金型及びそれを用いるプレス成形方法を提供できる。 According to the present invention, it is possible to provide a molding die in which the metal plate material is less likely to be cracked and wrinkles are less likely to be generated in the metal plate material when molding the metal plate material, and a press molding method using the same. ..

図１は、本発明の一実施形態である成形金型の構成を模式的に示す断面図である。FIG. 1 is a cross-sectional view schematically showing the structure of a molding die according to an embodiment of the present invention. 図２は、図１に示す成形金型を用いてプレス成形し、金属製の板材を変形させて金属製の板材に仮屈曲部を形成する様子を模式的に示す断面図である。FIG. 2 is a cross-sectional view schematically showing a state in which a temporary bent portion is formed in a metal plate material by deforming a metal plate material by press molding using the molding die shown in FIG. 図３は、図１に示す成形金型を用い、第１部材の***部に金属製の板材の仮屈曲部を係合させた状態で、金属製の板材をプレス成形する様子を模式的に示す断面図である。FIG. 3 schematically shows a state in which a metal plate material is press-molded in a state where a temporarily bent portion of the metal plate material is engaged with a raised portion of the first member using the molding die shown in FIG. It is sectional drawing which shows. 図４は、図１に示す成形金型を用い、金属製の板材の仮屈曲部を引き延ばしながら、金属製の板材をプレス成形する様子を模式的に示す断面図である。FIG. 4 is a cross-sectional view schematically showing a state in which a metal plate material is press-molded while stretching a temporarily bent portion of the metal plate material using the molding die shown in FIG.

以下、本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。
図１には本発明の一実施形態である成形金型１の斜視図が示されている。成形金型１は、金属製の板材１０をプレス成形するものである。 Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings.
FIG. 1 shows a perspective view of a molding die 1 according to an embodiment of the present invention. The molding die 1 is for press-molding a metal plate material 10.

金属製の板材１０としては、アルミニウム板、ステンレス板、マグネシウム板、鉄板等が挙げられ、軽量化の観点から、アルミニウム板、マグネシウム板等の合金板が好ましく用いられ、アルミニウム板が特に好ましく用いられる。アルミニウム板とは、純アルミニウム板のみならず、それに加えてアルミニウムを主成分とする合金板を含むものである。アルミニウム板として、合金板を使用する場合、１０００系、２０００系、３０００系、４０００系、５０００系、６０００系、７０００系及び８０００系の合金が好ましく用いられ、コストの観点及び量産性の観点から、４０００系及び５０００系の合金が特に好ましく用いられる。 Examples of the metal plate material 10 include an aluminum plate, a stainless plate, a magnesium plate, an iron plate, and the like. From the viewpoint of weight reduction, an alloy plate such as an aluminum plate and a magnesium plate is preferably used, and an aluminum plate is particularly preferably used. .. The aluminum plate includes not only a pure aluminum plate but also an alloy plate containing aluminum as a main component. When an alloy plate is used as the aluminum plate, alloys of 1000 series, 2000 series, 3000 series, 4000 series, 5000 series, 6000 series, 7000 series and 8000 series are preferably used, and from the viewpoint of cost and mass productivity. 4000 series and 5000 series alloys are particularly preferably used.

金属製の板材１０の厚みは、均一であることが好ましい。最も薄い位置での板材１０の厚みは、０．２ｍｍ以上５ｍｍ以下であることが好ましく、０．５ｍｍ以上３ｍｍ以下であることが更に好ましく、０．７ｍｍ以上２ｍｍ以下であることが特に好ましい。 The thickness of the metal plate 10 is preferably uniform. The thickness of the plate material 10 at the thinnest position is preferably 0.2 mm or more and 5 mm or less, more preferably 0.5 mm or more and 3 mm or less, and particularly preferably 0.7 mm or more and 2 mm or less.

図１に示すように、成形金型１は、凹部２１を有するダイ２、凸部３１を有するパンチ３、貫通口４１を有する第１部材４、ダイ２と第１部材４との間隔を調整する第２部材５を備えている。成形金型１は、それらに加えて、周知のコンピュータで構成された制御部（不図示）を備えている。 As shown in FIG. 1, the molding die 1 adjusts the distance between the die 2 having the concave portion 21, the punch 3 having the convex portion 31, the first member 4 having the through hole 41, and the die 2 and the first member 4. The second member 5 is provided. In addition to these, the molding die 1 includes a control unit (not shown) composed of a well-known computer.

ダイ２、パンチ３及び第１部材４は、制御部（不図示）と電気的に接続されている。制御部に入力された移動軌道のデータ、或いは操作者がコントローラーを介して制御部に入力した操作信号に基づき、ダイ２、パンチ３及び第１部材４を移動させることが可能になされている。制御部には、移動データが入力されているか、又は入力可能になされている。制御部への移動データの入力は、ＵＳＢメモリ等の記録媒体を介して入力可能であってもよいし、インターネットやイントラネット等のネットワークを介して入力可能であってもよい。 The die 2, the punch 3, and the first member 4 are electrically connected to a control unit (not shown). The die 2, the punch 3, and the first member 4 can be moved based on the movement trajectory data input to the control unit or the operation signal input to the control unit by the operator via the controller. Movement data is input to the control unit or can be input. The input of the movement data to the control unit may be possible via a recording medium such as a USB memory, or may be input via a network such as the Internet or an intranet.

第１部材４は、金属製のものであり、図１に示すように、ダイ２とパンチ３との間に配されている。第１部材４は、その中央部分に貫通口４１を有している。貫通口４１は、その輪郭がダイ２の凹部２１の輪郭と一致する形状となっている。第１部材４は、貫通口４１の周縁部にパンチ３の凸部３１よりも低く***する***部４２と、該周縁部から外方に位置する外周部４３とを有する。***部４２は、貫通口４１から連続して該貫通口４１から外方に形成されている。***部４２を備えている結果、第１部材４は、貫通口４１の周縁部が、外周部４３から上方に段状に***している。***部４２及び外周部４３は、それぞれ、金属製の板材１０との対向面となる上面が水平な面となっていることが好ましい。 The first member 4 is made of metal and is arranged between the die 2 and the punch 3 as shown in FIG. The first member 4 has a through port 41 in the central portion thereof. The through-hole 41 has a shape whose contour matches the contour of the recess 21 of the die 2. The first member 4 has a raised portion 42 that rises lower than the convex portion 31 of the punch 3 on the peripheral edge portion of the through port 41, and an outer peripheral portion 43 that is located outward from the peripheral edge portion. The raised portion 42 is formed continuously from the through port 41 and outward from the through port 41. As a result of providing the raised portion 42, the peripheral portion of the through-hole 41 of the first member 4 is raised in a stepped manner upward from the outer peripheral portion 43. It is preferable that the upper surface of each of the raised portion 42 and the outer peripheral portion 43, which is a surface facing the metal plate member 10, is a horizontal surface.

金属製の板材の中でも、特にアルミニウム板材又はマグネシウム板材に割れが発生し難く、アルミニウム板材又はマグネシウム板材に皺が発生し難い観点から、外周部４３の上面と***部４２の上面との間隔ｔ１は、凸部３１の高さｔ２よりも小さいが、金属製の板材１０の厚みｔ３よりも大きいことが好ましい。間隔ｔ１は最も広い位置での値である。高さｔ２は最も高い位置での値である。厚みｔ３は最も薄い位置での値である。 Among the metal plate materials, the distance t1 between the upper surface of the outer peripheral portion 43 and the upper surface of the raised portion 42 is set from the viewpoint that the aluminum plate material or the magnesium plate material is less likely to be cracked and the aluminum plate material or the magnesium plate material is less likely to be wrinkled. Although it is smaller than the height t2 of the convex portion 31, it is preferably larger than the thickness t3 of the metal plate material 10. The interval t1 is the value at the widest position. The height t2 is the value at the highest position. The thickness t3 is a value at the thinnest position.

高さｔ２に対する間隔ｔ１の割合は、０．５％以上３％以下であることが好ましく、１％以上２％以下であることが更に好ましい。
厚みｔ３に対する間隔ｔ１の割合は、３００％以上６０００％以下であることが好ましく、５００％以上２０００％以下であることが更に好ましい。
間隔ｔ１は、１ｍｍ以上３０ｍｍ以下であることが好ましく、３ｍｍ以上１２ｍｍ以下であることが更に好ましく、４ｍｍ以上６ｍｍ以下であることが特に好ましい。
高さｔ２は、５０ｍｍ以上１０００ｍｍ以下であることが好ましく、３００ｍｍ以上７００ｍｍ以下であることが更に好ましい。
厚みｔ３は、０．２ｍｍ以上５ｍｍ以下であることが好ましく、０．５ｍｍ以上３ｍｍ以下であることが更に好ましく、０．７ｍｍ以上２ｍｍ以下であることが特に好ましい。 The ratio of the interval t1 to the height t2 is preferably 0.5% or more and 3% or less, and more preferably 1% or more and 2% or less.
The ratio of the interval t1 to the thickness t3 is preferably 300% or more and 6000% or less, and more preferably 500% or more and 2000% or less.
The interval t1 is preferably 1 mm or more and 30 mm or less, more preferably 3 mm or more and 12 mm or less, and particularly preferably 4 mm or more and 6 mm or less.
The height t2 is preferably 50 mm or more and 1000 mm or less, and more preferably 300 mm or more and 700 mm or less.
The thickness t3 is preferably 0.2 mm or more and 5 mm or less, more preferably 0.5 mm or more and 3 mm or less, and particularly preferably 0.7 mm or more and 2 mm or less.

ダイ２は、金属製のものであり、図１に示すように、中央部分に上方に向かって窪んだ凹部２１を備えている。ダイ２は、凹部２１の周縁部に***部４２に嵌合する凹陥部２２と、該周縁部から外方に位置する外周部２３とを有する。凹陥部２２は、凹部２１よりも浅く窪んだものである。凹陥部２２は、凹部２１から連続して該凹部２１から外方に形成されている。凹陥部２２を備えている結果、ダイ２は、凹部２１の周縁部が、外周部２３から上方に段状に陥没している。凹陥部２２及び外周部２３は、それぞれ、金属製の板材１０との対向面となる下面が水平な面となっていることが好ましい。 The die 2 is made of metal and, as shown in FIG. 1, has a recess 21 recessed upward in the central portion. The die 2 has a recessed portion 22 that fits into the raised portion 42 at the peripheral edge portion of the concave portion 21, and an outer peripheral portion 23 that is located outward from the peripheral edge portion. The recessed portion 22 is shallower than the recessed portion 21. The recessed portion 22 is formed continuously from the recessed portion 21 and outward from the recessed portion 21. As a result of providing the recessed portion 22, the peripheral edge portion of the recessed portion 21 of the die 2 is recessed upward in a stepped manner from the outer peripheral portion 23. It is preferable that the lower surface of each of the recessed portion 22 and the outer peripheral portion 23, which is a surface facing the metal plate member 10, is a horizontal surface.

金属製の板材の中でも、特にアルミニウム板材又はマグネシウム板材に割れが発生し難く、アルミニウム板材又はマグネシウム板材に皺が発生し難い観点から、外周部２３の下面と凹陥部２２の下面との間隔ｔ４は、凹部２１の窪み高さｔ５よりも小さいが、金属製の板材１０の厚みｔ３よりも大きいことが好ましい。間隔ｔ４は最も深い位置での値である。高さｔ５は最も深い位置での値である。凹陥部２２の間隔ｔ４は、***部４２の間隔ｔ１と同じであることが好ましい。 Among the metal plate materials, the distance t4 between the lower surface of the outer peripheral portion 23 and the lower surface of the recessed portion 22 is set from the viewpoint that the aluminum plate material or the magnesium plate material is less likely to be cracked and the aluminum plate material or the magnesium plate material is less likely to be wrinkled. Although it is smaller than the recess height t5 of the recess 21, it is preferably larger than the thickness t3 of the metal plate material 10. The interval t4 is the value at the deepest position. The height t5 is the value at the deepest position. The distance t4 of the recessed portion 22 is preferably the same as the distance t1 of the raised portion 42.

高さｔ５に対する間隔ｔ４の割合は、１％以上２０％以下であることが好ましく、１％以上２％以下であることが更に好ましい。
厚みｔ３に対する間隔ｔ４の割合は、３００％以上６０００％以下であることが好ましく、５００％以上２０００％以下であることが更に好ましい。
間隔ｔ４は、１ｍｍ以上３０ｍｍ以下であることが好ましく、３ｍｍ以上１２ｍｍ以下であることが更に好ましい。
高さｔ５は、１５ｍｍ以上７００ｍｍ以下であることが好ましく、７５ｍｍ以上２５０ｍｍ以下であることが更に好ましい。 The ratio of the interval t4 to the height t5 is preferably 1% or more and 20% or less, and more preferably 1% or more and 2% or less.
The ratio of the interval t4 to the thickness t3 is preferably 300% or more and 6000% or less, and more preferably 500% or more and 2000% or less.
The interval t4 is preferably 1 mm or more and 30 mm or less, and more preferably 3 mm or more and 12 mm or less.
The height t5 is preferably 15 mm or more and 700 mm or less, and more preferably 75 mm or more and 250 mm or less.

パンチ３は、金属製のものであり、図１に示すように、中央部分に上方に向かって***した凸部３１と、凸部３１から外方に位置する外周部３３とを有する。凸部３１は、第１部材４の貫通口４１及びダイ２の凹部２１に挿通可能となっている。凸部３１及び外周部３３は、それぞれ、金属製の板材１０との対向面となる上面が水平な面となっていることが好ましい。 The punch 3 is made of metal, and as shown in FIG. 1, has a convex portion 31 that rises upward in the central portion and an outer peripheral portion 33 that is located outward from the convex portion 31. The convex portion 31 can be inserted into the through port 41 of the first member 4 and the concave portion 21 of the die 2. It is preferable that the upper surface of each of the convex portion 31 and the outer peripheral portion 33, which is a surface facing the metal plate member 10, is a horizontal surface.

第２部材５は、金属製のものであり、図１に示すように、プレート状に形成されている。第２部材５は、***部４２及び凹陥部２２から外方に配されており、且つ金属製の板材１０から外方に配されている。第２部材５は、ダイ２の外周部２３と第１部材４の外周部４３との間に位置するように外周部２３上に配されている。プレート状の第２部材５は、ダイ２と第１部材４との間隔を、金属製の板材１０の厚みｔ３以上に調整するものである。 The second member 5 is made of metal and is formed in a plate shape as shown in FIG. The second member 5 is arranged outward from the raised portion 42 and the recessed portion 22, and is arranged outward from the metal plate member 10. The second member 5 is arranged on the outer peripheral portion 23 so as to be located between the outer peripheral portion 23 of the die 2 and the outer peripheral portion 43 of the first member 4. The plate-shaped second member 5 adjusts the distance between the die 2 and the first member 4 to a thickness t3 or more of the metal plate member 10.

金属製の板材の中でも、特にアルミニウム板材又はマグネシウム板材に割れが発生し難く、アルミニウム板材又はマグネシウム板材に皺が発生し難い観点から、第２部材５によって、ダイ２と上昇させた第１部材４との間隔ｔ６を、金属製の板材１０の厚みｔ３よりも大きく調整することが好ましく、同じに調整することが最も好ましい。また間隔ｔ６を厚みｔ３よりも大きく調整するときには、厚みｔ３に対する間隔ｔ６の割合は、１００％以上１０００％以下であることが好ましく、１００％以上２００％以下であることが更に好ましい。
間隔ｔ６は、０．２ｍｍ以上２５ｍｍ以下であることが好ましく、０．６ｍｍ以上１０ｍｍ以下であることが更に好ましく、１ｍｍ以上３ｍｍ以下であることが特に好ましい。間隔ｔ６は最も狭い位置での値である。 Among the metal plate materials, the first member 4 raised with the die 2 by the second member 5 from the viewpoint that the aluminum plate material or the magnesium plate material is less likely to be cracked and the aluminum plate material or the magnesium plate material is less likely to be wrinkled. It is preferable to adjust the interval t6 with and from the metal plate 10 to be larger than the thickness t3 of the metal plate material 10, and it is most preferable to adjust the same. When the interval t6 is adjusted to be larger than the thickness t3, the ratio of the interval t6 to the thickness t3 is preferably 100% or more and 1000% or less, and more preferably 100% or more and 200% or less.
The interval t6 is preferably 0.2 mm or more and 25 mm or less, more preferably 0.6 mm or more and 10 mm or less, and particularly preferably 1 mm or more and 3 mm or less. The interval t6 is the value at the narrowest position.

成形金型１を用いた金属製の板材１０のプレス成形方法の好ましい一実施態様を、説明する。先ず、図１に示すように、ダイ２と第１部材４との間に、金属製の板材１０を配置する。次に、制御部（不図示）から送られる操作信号に基づき、第１部材４を上方に作動させる。そして、図２に示すように、金属製の板材１０をダイ２と第１部材４とで挟んだときに、第２部材５によって第１部材４とダイ２との間の距離である間隔ｔ６を金属製の板材１０の厚みｔ３以上に調整する。それとともに、凹陥部２２と***部４２とを嵌合させ金属製の板材１０を塑性変形させて該金属製の板材１０の周縁部に仮屈曲部１１を形成する工程を行う。 A preferred embodiment of the press molding method of the metal plate material 10 using the molding die 1 will be described. First, as shown in FIG. 1, a metal plate member 10 is arranged between the die 2 and the first member 4. Next, the first member 4 is operated upward based on the operation signal sent from the control unit (not shown). Then, as shown in FIG. 2, when the metal plate member 10 is sandwiched between the die 2 and the first member 4, the interval t6, which is the distance between the first member 4 and the die 2 by the second member 5. Is adjusted to a thickness t3 or more of the metal plate material 10. At the same time, a step of fitting the recessed portion 22 and the raised portion 42 and plastically deforming the metal plate material 10 to form a temporary bent portion 11 on the peripheral edge portion of the metal plate material 10 is performed.

次いで、図３に示すように、第２部材５によって第１部材４とダイ２との間隔ｔ６を金属製の板材１０の厚みｔ３以上に調整した状態で、制御部（不図示）から送られる操作信号に基づき、パンチ３を上方に作動させる。そして、凸部３１を貫通口４１及び凹部２１に挿通して金属製の板材１０をプレス成形する。このようにプレス成形するときには、先ず***部４２に仮屈曲部１１を係合させ、金属製の板材１０における仮屈曲部１１から外方部分１２の凹部２１側への移動を防ぎながらプレス成形する。第１部材４とダイ２との間隔ｔ６が金属製の板材１０の厚みｔ３以上に調整されている結果、金属製の板材１０は、第１部材４とダイ２との間で挟持されていない状態となっている。しかし金属製の板材１０は、仮屈曲部１１によって***部４２に係合されており、外方部分１２の凹部２１側への移動を防ぎながらプレス成形できる結果、金属製の板材１０に皺が発生し難くなっている。 Next, as shown in FIG. 3, the second member 5 adjusts the distance t6 between the first member 4 and the die 2 to be equal to or greater than the thickness t3 of the metal plate member 10, and is sent from the control unit (not shown). The punch 3 is operated upward based on the operation signal. Then, the convex portion 31 is inserted into the through port 41 and the concave portion 21 to press-mold the metal plate material 10. When press-molding in this way, first, the temporary bending portion 11 is engaged with the raised portion 42, and the metal plate material 10 is press-molded while preventing the temporary bending portion 11 from moving to the concave portion 21 side of the outer portion 12. .. As a result of adjusting the distance t6 between the first member 4 and the die 2 to be equal to or greater than the thickness t3 of the metal plate material 10, the metal plate material 10 is not sandwiched between the first member 4 and the die 2. It is in a state. However, the metal plate material 10 is engaged with the raised portion 42 by the temporary bending portion 11, and as a result of press molding while preventing the outer portion 12 from moving to the concave portion 21 side, wrinkles are formed on the metal plate material 10. It is less likely to occur.

その後、図４に示すように、第２部材５によって第１部材４とダイ２との間隔ｔ６を金属製の板材１０の厚みｔ３以上に調整した状態で、制御部（不図示）から送られる操作信号に基づき、パンチ３を更に上方に作動させる。凸部３１を貫通口４１及び凹部２１に挿通して金属製の板材１０をプレス成形するときに、凸部３１によって凹陥部２２よりも深くプレス成形する。このように深くプレス成形するときには、金属製の板材１０の周縁部における仮屈曲部１１を引き延ばしながら、第１部材４の***部４２から内方に該周縁部を越えさせる。そして、ダイ２の凹部２１内に金属製の板材１０の周縁部を流入させつつプレス成形する工程を行う。凹部２１内に金属製の板材１０の周縁部を最大限流入させた状態においても、金属製の板材１０の周縁部の端縁は、***部４２と凹陥部２２とが嵌合した部分内に位置していることが好ましい。深くプレス成形するときも、金属製の板材１０は、第１部材４とダイ２との間で挟持されていない状態となっている。その為、金属製の板材１０の周縁部をダイ２の凹部２１内に流入させながらプレス成形でき、金属製の板材１０に割れが発生し難くなっている。以上のとおり、成形金型１を用いた金属製の板材１０のプレス成形方法によれば、金属製の板材１０を成形するときに、金属製の板材１０に割れが発生し難くなっており、しかも金属製の板材１０に皺が発生し難くなっている。 After that, as shown in FIG. 4, the second member 5 adjusts the distance t6 between the first member 4 and the die 2 to be equal to or more than the thickness t3 of the metal plate material 10, and is sent from the control unit (not shown). Based on the operation signal, the punch 3 is operated further upward. When the convex portion 31 is inserted into the through hole 41 and the concave portion 21 to press-mold the metal plate material 10, the convex portion 31 press-molds the metal plate material 10 deeper than the concave portion 22. When press-molding deeply in this way, the temporary bending portion 11 at the peripheral edge portion of the metal plate member 10 is stretched, and the peripheral edge portion is extended inward from the raised portion 42 of the first member 4. Then, a step of press molding is performed while flowing the peripheral edge portion of the metal plate material 10 into the recess 21 of the die 2. Even when the peripheral edge of the metal plate 10 is allowed to flow into the recess 21 to the maximum extent, the edge of the peripheral edge of the metal plate 10 is within the portion where the raised portion 42 and the recessed portion 22 are fitted. It is preferably located. Even when deep press molding is performed, the metal plate material 10 is not sandwiched between the first member 4 and the die 2. Therefore, the peripheral portion of the metal plate material 10 can be press-molded while flowing into the recess 21 of the die 2, and the metal plate material 10 is less likely to be cracked. As described above, according to the press molding method of the metal plate material 10 using the molding die 1, when the metal plate material 10 is molded, the metal plate material 10 is less likely to be cracked. Moreover, wrinkles are less likely to occur on the metal plate material 10.

金属製の板材１０の仮屈曲部１１を引き延ばしながら、第１部材４の***部４２から内方に金属製の板材１０の周縁部を越えさせ易くする観点から、***部４２における金属製の板材１０に接触する角α４（図３参照）、言い換えれば、***部４２に仮屈曲部１１が係合する部分の角α４は、面取りされていることが好ましく、鈍角に面取りされていることが更に好ましく、又は角α４に丸みが付いていた方が更に好ましい。角α４が面取りされているとき、角α４は、０°より大きく１８０°より小さいことが好ましく、１２０°以上１５０°以下であることが更に好ましい。角α４に丸みが付いているとき、角α４の丸みを表す曲率半径Ｒは、０．１ｍｍ以上３０ｍｍ以下であることが好ましく、３ｍｍ以上１２ｍｍ以下であることが更に好ましい。***部４２の角α４の曲率半径は、ダイ２における凹陥部２２と外周部２３との境界に位置する角α２（図３参照）の曲率半径以上であることが好ましく、角α２の曲率半径よりも大きいことが更に好ましい。角α２は、言い換えれば、***部４２と凹陥部２２とを嵌合させて金属製の板材１０を挟んだ状態において、***部４２の角α４に対向する、ダイ２の凹陥部２２における角である。 From the viewpoint of making it easier to extend the temporary bent portion 11 of the metal plate material 10 from the raised portion 42 of the first member 4 inwardly beyond the peripheral edge portion of the metal plate material 10, the metal plate material in the raised portion 42. The angle α4 in contact with 10 (see FIG. 3), in other words, the angle α4 of the portion where the temporary bending portion 11 engages with the raised portion 42 is preferably chamfered, and more preferably obtusely chamfered. It is preferable, or it is more preferable that the angle α4 is rounded. When the angle α4 is chamfered, the angle α4 is preferably larger than 0 ° and smaller than 180 °, and more preferably 120 ° or more and 150 ° or less. When the angle α4 is rounded, the radius of curvature R representing the roundness of the angle α4 is preferably 0.1 mm or more and 30 mm or less, and more preferably 3 mm or more and 12 mm or less. The radius of curvature of the angle α4 of the raised portion 42 is preferably equal to or greater than the radius of curvature of the angle α2 (see FIG. 3) located at the boundary between the recessed portion 22 and the outer peripheral portion 23 of the die 2, and is more than the radius of curvature of the angle α2. Is more preferable. In other words, the angle α2 is the angle of the recessed portion 22 of the die 2 that faces the angle α4 of the raised portion 42 in a state where the raised portion 42 and the recessed portion 22 are fitted and the metal plate member 10 is sandwiched. is there.

以上、本発明の成形金型及びそれを用いるプレス成形方法をその好ましい実施形態の成形金型１に基づき説明したが、本発明は前記実施形態に制限されない。 The molding die of the present invention and the press molding method using the same have been described above based on the molding die 1 of the preferred embodiment, but the present invention is not limited to the above embodiment.

例えば上述した本実施形態の成形金型１においては、図１に示すように、ダイ２及び第１部材４は、１つの***部４２と、該***部４２に嵌合する１つの凹陥部２２とを有している。それに代えて、第１部材４が複数の***部４２を有し、ダイ２が、これらの***部４２それぞれに嵌合する複数の凹陥部２２を有していてもよい。このようにダイ２及び第１部材４が、複数の***部４２と複数の凹陥部２２を有しているときには、***部４２による間隔ｔ１は、何れも同じであってもよく、異なっていてもよい。間隔ｔ１が異なっているときには、金属製の板材１０の皺を発生し難くする観点からは、ダイ２の凹部２１側に向かって、漸次大きくなっていることが好ましい。また金属製の板材１０の割れを発生し難くする観点からは、ダイ２の凹部２１側に向かって、漸次小さくなっていることが好ましい。 For example, in the molding die 1 of the present embodiment described above, as shown in FIG. 1, the die 2 and the first member 4 have one raised portion 42 and one recessed portion 22 fitted to the raised portion 42. And have. Instead, the first member 4 may have a plurality of raised portions 42 and the die 2 may have a plurality of recessed portions 22 that fit into each of these raised portions 42. As described above, when the die 2 and the first member 4 have a plurality of raised portions 42 and a plurality of recessed portions 22, the intervals t1 by the raised portions 42 may be the same or different. May be good. When the intervals t1 are different, it is preferable that the metal plate 10 gradually increases toward the recess 21 side from the viewpoint of making it difficult for wrinkles to occur. Further, from the viewpoint of making it difficult for the metal plate material 10 to crack, it is preferable that the die 2 gradually becomes smaller toward the concave portion 21 side.

また上述した本実施形態の成形金型１においては、図１に示すように、第１部材４の***部４２は、貫通口４１から連続して該貫通口４１から外方に形成されている。それに代えて、***部４２は、貫通口４１から間隔を空けた位置に、該貫通口４１から外方に形成されていてもよい。同様に、ダイ２の凹陥部２２は、凹部２１から連続して該凹部２１から外方に形成されている。それに代えて、凹陥部２２は、凹部２１から間隔を空けた位置に、該凹部２１から外方に形成されていてもよい。 Further, in the molding die 1 of the present embodiment described above, as shown in FIG. 1, the raised portion 42 of the first member 4 is formed continuously from the through port 41 and outward from the through port 41. .. Instead, the raised portion 42 may be formed outward from the through-hole 41 at a position spaced apart from the through-hole 41. Similarly, the recessed portion 22 of the die 2 is formed continuously from the recessed portion 21 and outward from the recessed portion 21. Instead, the recessed portion 22 may be formed outward from the recessed portion 21 at a position spaced apart from the recessed portion 21.

１ 成形金型
２ ダイ
２１ 凹部
２２ 凹陥部
３ パンチ
３１ 凸部
４ 第１部材
４１ 貫通口
４２ ***部
５ 第２部材
１０ 金属製の板材
１１ 仮屈曲部
１２ 外方部分 1 Molding die 2 Die 21 Concave part 22 Recessed part 3 Punch 31 Convex part 4 First member 41 Penetration port 42 Raised part 5 Second member 10 Metal plate 11 Temporary bent part 12 Outer part

Claims (2)

凹部を有するダイ、凸部を有するパンチ、該凹部の輪郭に一致する形状の貫通口を有し且つ該ダイと該パンチとの間に配される第１部材を備え、該ダイ及び該第１部材の間に配された金属製の板材に対して、該凸部を該貫通口及び該凹部に挿通してプレス成形する成形金型であって、
前記第１部材は、前記貫通口の周縁部に前記凸部よりも低く***する***部を有し、
前記ダイは、前記***部に嵌合し且つ前記凹部よりも浅く窪んだ凹陥部を該凹部の周縁部に有し、
前記成形金型は、前記***部及び前記凹陥部から外方に、前記第１部材と前記ダイとの間隔を、前記金属製の板材の厚み以上に調整する第２部材を有している、成形金型。 A die having a concave portion, a punch having a convex portion, a first member having a through hole having a shape matching the contour of the concave portion and being arranged between the die and the punch, the die and the first member. A molding die for press-molding a metal plate material arranged between members by inserting the convex portion into the through hole and the concave portion.
The first member has a raised portion that rises lower than the convex portion at the peripheral edge portion of the through port.
The die has a recessed portion that fits into the raised portion and is recessed shallower than the recessed portion at the peripheral edge of the recessed portion.
The molding die has a second member that adjusts the distance between the first member and the die to be equal to or greater than the thickness of the metal plate material outward from the raised portion and the recessed portion. Molding mold. 凹部を有するダイ、凸部を有するパンチ、該凹部の輪郭に一致する形状の貫通口を有し且つ該ダイと該パンチとの間に配される第１部材を備え、
前記第１部材は、前記貫通口の周縁部に前記凸部よりも低く***する***部を有し、
前記ダイは、前記***部に嵌合し且つ前記凹部よりも浅く窪んだ凹陥部を該凹部の周縁部に有し、
前記***部及び前記凹陥部から外方に、前記第１部材と前記ダイとの間の距離を調整する第２部材を有する成形金型を用いるプレス成形方法であって、
金属製の板材を前記ダイと前記第１部材とで挟んだときに、前記第２部材によって該第１部材と該ダイとの間の距離を該金属製の板材の厚み以上に調整しつつ、前記凹陥部と前記***部とを嵌合させ該金属製の板材を変形させて該金属製の板材の周縁部に仮屈曲部を形成する工程と、
前記凸部を前記貫通口及び前記凹部に挿通して前記金属製の板材をプレス成形するときには、先ず前記***部に前記仮屈曲部を係合させ、該金属製の板材における該仮屈曲部から外方部分の前記凹部側への移動を防ぎながらプレス成形し、
その後、前記凹陥部よりも深くプレス成形するときには、前記仮屈曲部を延ばしながら前記***部から内方に前記金属製の板材の周縁部を越えさせ、該周縁部を前記凹部内に流入させつつプレス成形する工程とを備える、プレス成形方法。 A die having a concave portion, a punch having a convex portion, a first member having a through hole having a shape matching the contour of the concave portion and being arranged between the die and the punch.
The first member has a raised portion that rises lower than the convex portion at the peripheral edge portion of the through port.
The die has a recessed portion that fits into the raised portion and is recessed shallower than the recessed portion at the peripheral edge of the recessed portion.
A press molding method using a molding die having a second member for adjusting the distance between the first member and the die outward from the raised portion and the recessed portion.
When the metal plate material is sandwiched between the die and the first member, the second member adjusts the distance between the first member and the die to be equal to or greater than the thickness of the metal plate material. A step of fitting the recessed portion and the raised portion and deforming the metal plate material to form a temporary bent portion on the peripheral edge portion of the metal plate material.
When the convex portion is inserted into the through hole and the concave portion to press-mold the metal plate material, the temporary bending portion is first engaged with the raised portion, and the temporary bending portion in the metal plate material is used. Press-mold while preventing the outer part from moving to the concave side,
After that, when press-molding deeper than the recessed portion, the temporarily bent portion is extended and the peripheral edge portion of the metal plate material is made to pass inward from the raised portion, and the peripheral edge portion is allowed to flow into the recessed portion. A press molding method including a process of press molding.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115647212A (en) * 2022-12-08 2023-01-31 宁波宏协承汽车部件有限公司 Stretching die

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06335733A (en) * 1993-05-27 1994-12-06 Honda Motor Co Ltd Method for drawing al-base blank
JPH07230762A (en) * 1994-02-16 1995-08-29 Matsushita Electric Ind Co Ltd Box-shaped part molding metal die device and molding method
WO2016103682A1 (en) * 2014-12-25 2016-06-30 新日鐵住金株式会社 Panel-shaped molded article and production method for panel-shaped molded article
WO2017047601A1 (en) * 2015-09-18 2017-03-23 新日鐵住金株式会社 Panel-shaped molded article and production method therefor
JP2019118955A (en) * 2018-01-11 2019-07-22 株式会社神戸製鋼所 Press molding method and press molding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06335733A (en) * 1993-05-27 1994-12-06 Honda Motor Co Ltd Method for drawing al-base blank
JPH07230762A (en) * 1994-02-16 1995-08-29 Matsushita Electric Ind Co Ltd Box-shaped part molding metal die device and molding method
WO2016103682A1 (en) * 2014-12-25 2016-06-30 新日鐵住金株式会社 Panel-shaped molded article and production method for panel-shaped molded article
WO2017047601A1 (en) * 2015-09-18 2017-03-23 新日鐵住金株式会社 Panel-shaped molded article and production method therefor
JP2019118955A (en) * 2018-01-11 2019-07-22 株式会社神戸製鋼所 Press molding method and press molding device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115647212A (en) * 2022-12-08 2023-01-31 宁波宏协承汽车部件有限公司 Stretching die

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