JP2019214068A - Method of manufacturing bent member - Google Patents
Method of manufacturing bent member Download PDFInfo
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- JP2019214068A JP2019214068A JP2018112973A JP2018112973A JP2019214068A JP 2019214068 A JP2019214068 A JP 2019214068A JP 2018112973 A JP2018112973 A JP 2018112973A JP 2018112973 A JP2018112973 A JP 2018112973A JP 2019214068 A JP2019214068 A JP 2019214068A
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- mold
- bent portion
- pressing
- bent
- manufacturing
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- 238000004519 manufacturing process Methods 0.000 title claims description 25
- 239000000463 material Substances 0.000 claims abstract description 99
- 238000003825 pressing Methods 0.000 claims abstract description 84
- 230000002093 peripheral effect Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 19
- 238000005452 bending Methods 0.000 claims description 13
- 238000005304 joining Methods 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 238000000465 moulding Methods 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000000750 progressive effect Effects 0.000 description 17
- 238000007665 sagging Methods 0.000 description 14
- 239000000470 constituent Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
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
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
- B21D5/045—With a wiping movement of the bending blade
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- 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
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
- B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes
-
- 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
- B21D22/02—Stamping using rigid devices or tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Forging (AREA)
Abstract
Description
本開示は、屈曲部材の製造方法に関する。 The present disclosure relates to a method for manufacturing a bent member.
プレス成形により、板材の孔を囲むバーリング部を成形する技術が知られている。特許文献１のバーリング加工装置は、固定ダイにより板材の孔部を囲む周辺領域を押圧することで、バーリング部を成形する。 A technique of forming a burring portion surrounding a hole of a plate material by press forming is known. The burring apparatus of Patent Document 1 forms a burring portion by pressing a peripheral region surrounding a hole of a plate material with a fixed die.
しかしながら、例えば、板材を構成する材料の特性、板材の厚さ、又はバーリング部の高さ等によっては、バーリング角部にダレが生じる可能性がある。すなわち、プレス成形時にバーリング角部まで十分に材料が移動せず、バーリング角部の丸みが大きくなり過ぎる恐れがある。その結果、例えば、バーリング部の反対側にて孔の周辺をシールするのが困難になる恐れがある。なお、バーリング角部とは、バーリング部における屈曲した部分の外側の角部であり、バーリング部が設けられた孔の縁に位置する部分である。 However, depending on, for example, the characteristics of the material constituting the plate material, the thickness of the plate material, the height of the burring portion, and the like, sagging may occur at the burring corner. That is, the material does not sufficiently move to the burring corner during press molding, and the burring corner may be excessively rounded. As a result, for example, it may be difficult to seal around the hole on the opposite side of the burring portion. Note that the burring corner is a corner outside the bent portion of the burring portion, and is a portion located at an edge of a hole provided with the burring portion.
これに対し、例えば、プレス成形の成形荷重を大きくしたり、鍛造や切削等を行ったりすることで、バーリング角部のダレを抑制できると考えられる。しかしながら、このような手段を適用することで、順送型のプレス成形によるバーリング部の成形が困難となり、製造コストが増加する恐れがある。 On the other hand, it is considered that the sagging of the burring corner can be suppressed by, for example, increasing the forming load of press forming, or performing forging, cutting, or the like. However, by applying such means, it is difficult to form the burring portion by progressive press forming, and there is a possibility that the manufacturing cost may increase.
本開示の一側面においては、ダレを抑制しながら、順送型のプレス成形により部材を成形するのが望ましい。 In one aspect of the present disclosure, it is desirable to form a member by progressive press molding while suppressing sagging.
本開示の一態様は、屈曲部材の製造方法である。ここで、板状の本体部と、本体部の縁から突出側に屈曲した屈曲部とを有する板材を、対象板材とする。本製造方法では、対象板材を、突出側に位置する内側金型と、外側金型とにより挟んで押圧方向に押圧することで、本体部の縁から屈曲部が突出側に突出した屈曲部材を成形する。外側金型は、外側主面と、外側主面の縁から延びる外側側面とを有する。また、外側主面と外側側面との境界をなす部分を、金型角部とする。対象板材を押圧する際、外側主面は本体部に当接し、外側側面は屈曲部に当接し、金型角部は屈曲部の外周側に位置する。内側金型は、内側主面と、傾斜面とを有する。対象板材を押圧する際、内側主面は本体部に当接し、傾斜面は、押圧方向に対し傾斜し、且つ、金型角部に向かい、さらに、屈曲部の内周側を押圧し、屈曲部に含まれる材料を金型角部に向けて移動させる。 One embodiment of the present disclosure is a method for manufacturing a bent member. Here, a plate having a plate-shaped main body and a bent portion bent from the edge of the main body to the protruding side is defined as a target plate. In the present manufacturing method, the target plate material, the inner mold located on the protruding side, by pressing in the pressing direction sandwiched by the outer mold, the bent member from the edge of the main body portion the bent portion protruded to the protruding side. Mold. The outer mold has an outer main surface and an outer side surface extending from an edge of the outer main surface. Further, a portion that forms a boundary between the outer main surface and the outer side surface is defined as a mold corner. When pressing the target plate material, the outer main surface comes into contact with the main body, the outer side surface comes into contact with the bent portion, and the mold corner is located on the outer peripheral side of the bent portion. The inner mold has an inner main surface and an inclined surface. When pressing the target plate material, the inner main surface comes into contact with the main body, the inclined surface is inclined with respect to the pressing direction, and faces the corner of the mold, and further presses the inner peripheral side of the bent portion to be bent. The material contained in the part is moved toward the corner of the mold.
上記構成によれば、屈曲部が既に設けられた対象板材を、内側金型と外側金型とにより挟んで押圧することで、屈曲部材が成形される。これにより、内側金型と外側金型とにより対象板材を押圧する際の成形荷重を抑制できる。このため、順送型のプレス成形により屈曲部を成形することが可能となる。 According to the above configuration, the bent member is formed by sandwiching and pressing the target plate material provided with the bent portion between the inner mold and the outer mold. Thereby, the forming load when the target plate material is pressed by the inner mold and the outer mold can be suppressed. For this reason, the bent portion can be formed by progressive die press forming.
また、内側金型と外側金型とによる押圧の際、内側金型の傾斜面は、屈曲部の内周側を押圧し、屈曲部に含まれる材料を金型角部に向けて移動させる。さらにこの時、板材の本体部は、内側金型と外側金型とにより両側から押圧される。このため、屈曲部の材料が本体部に移動するのが抑制され、金型角部に向けての材料の移動がさらに促される。これにより、金型角部の付近に効果的に材料を移動させながら、対象板材における金型角部に当接する部分に、屈曲部の外側の角部（以後、外側角部）を成形できる。 Further, when the inner mold and the outer mold press, the inclined surface of the inner mold presses the inner peripheral side of the bent portion, and moves the material included in the bent portion toward the corner of the mold. Further, at this time, the main body of the plate is pressed from both sides by the inner mold and the outer mold. Therefore, the movement of the material of the bent portion to the main body is suppressed, and the movement of the material toward the corner of the mold is further promoted. Thereby, the corner outside the bent portion (hereinafter, the outer corner) can be formed at the portion of the target plate material that abuts on the mold corner while effectively moving the material near the mold corner.
したがって、屈曲部材の外側角部のダレ（換言すれば、外側角部の丸みが過度に大きくなること）を抑制しながら、順送型のプレス成形により屈曲部材を成形可能となる。
また、本開示の一態様では、板材を屈曲させることで、対象板材を成形してもよい。そして、対象板材を、内側金型と外側金型とにより挟んで押圧してもよい。
Therefore, it is possible to form the bent member by progressive press forming while suppressing sagging of the outer corners of the bending member (in other words, excessively rounding of the outer corners).
In one embodiment of the present disclosure, the target plate material may be formed by bending the plate material. Then, the target plate material may be pressed by being sandwiched between the inner mold and the outer mold.
上記構成によれば、板材を屈曲させて屈曲部を成形した後、該板材を内側金型と外側金型とにより挟んで押圧する。つまり、少なくとも２段階の押圧で屈曲部が成形されるため、各段階における成形荷重を抑制できる。このため、順送型のプレス成形により屈曲部を成形することが可能となる。 According to the above configuration, after bending the plate material to form a bent portion, the plate material is sandwiched between the inner mold and the outer mold and pressed. That is, since the bent portion is formed by pressing at least two stages, the forming load at each stage can be suppressed. For this reason, the bent portion can be formed by progressive die press forming.
また、本開示の一態様では、対象板材の屈曲部の内周側には、湾曲面が設けられていても良い。そして、対象板材を押圧する際、傾斜面は湾曲面を押圧してもよい。
上記構成によれば、傾斜面が屈曲部の内周側を押圧する際、材料が外側金型に向かって移動し易くなり、より一層、ダレを抑制できると共に、内側金型と外側金型とによる押圧の際の成形荷重を抑制できる。このため、順送型のプレス成形により屈曲部材を成形し易くなる。
Further, in one aspect of the present disclosure, a curved surface may be provided on the inner peripheral side of the bent portion of the target plate material. When pressing the target plate, the inclined surface may press the curved surface.
According to the above configuration, when the inclined surface presses the inner peripheral side of the bent portion, the material easily moves toward the outer mold, and furthermore, the sag can be suppressed, and the inner mold and the outer mold can be used. The molding load at the time of pressing can be suppressed. For this reason, the bent member can be easily formed by progressive press forming.
また、本開示の一態様では、内側金型として、第１内側金型と第２内側金型とが用いられてもよい。また、外側金型と第１内側金型とにより対象板材を押圧した後、外側金型と第２内側金型とにより対象板材を押圧してもよい。そして、第１内側金型の傾斜面は、第２内側金型の傾斜面よりも、押圧方向に対し傾斜していてもよい。 In one embodiment of the present disclosure, a first inner mold and a second inner mold may be used as the inner mold. Further, after the target plate is pressed by the outer die and the first inner die, the target plate may be pressed by the outer die and the second inner die. The inclined surface of the first inner mold may be inclined with respect to the pressing direction more than the inclined surface of the second inner mold.
上記構成によれば、内側金型と外側金型とによる押圧が、さらに２段階の押圧に分けられる。このため、各段階における成形荷重を抑制できる。さらに、１段階目の押圧に用いられる第１内側金型の傾斜面は、２段階目の押圧に用いられる第２内側金型の傾斜面に比べ押圧方向に対する傾斜が大きく、より大きな成形荷重を生じ易い。このため、１段階目の押圧で、屈曲部の材料を金型角部に向けて効果的に移動させることができる。そして、２段階目の押圧で、屈曲部の材料を金型角部に向けて移動させながら、屈曲部を押圧方向に延ばすことができる。このため、ダレを効果的に抑制しながら、各段階の押圧に必要な成形荷重を抑制でき、より一層、順送型のプレス成形により屈曲部材を成形し易くなる。 According to the above configuration, the pressing by the inner mold and the outer mold is further divided into two-stage pressing. For this reason, the molding load at each stage can be suppressed. Furthermore, the inclined surface of the first inner mold used for the first-stage pressing has a larger inclination with respect to the pressing direction than the inclined surface of the second inner mold used for the second-stage pressing, and a larger forming load is applied. Easy to occur. Therefore, the first-stage pressing can effectively move the material of the bent portion toward the corner of the mold. Then, by the second-stage pressing, the bent portion can be extended in the pressing direction while moving the material of the bent portion toward the corner of the mold. For this reason, the forming load required for each stage of pressing can be suppressed while effectively suppressing sagging, and the bent member can be more easily formed by progressive press forming.
また、本開示の一態様では、第１内側金型は、さらに端面を有してもよい。また、対象板材を押圧する際、端面は、屈曲部の先端に当接してもよい。また、対象板材を押圧する際、第２内側金型は、傾斜面の突出側に、屈曲部の先端が金型に当接しないようにするための空間を、外側金型との間に成形してもよい。 In one aspect of the present disclosure, the first inner mold may further have an end surface. Further, when pressing the target plate material, the end surface may abut on the tip of the bent portion. Also, when pressing the target plate material, the second inner mold forms a space between the outer mold and the projecting side of the inclined surface so that the tip of the bent portion does not contact the mold. May be.
上記構成によれば、第１内側金型を用いた１段階目の押圧では、端面により屈曲部の先端が押圧されるため、屈曲部の材料を金型角部に向けて効果的に移動させることができる。このため、好適にダレを抑制できる。また、第２内側金型を用いた２段階目の押圧では、屈曲部の先端が押圧されず、第２内側金型と外側金型との間の空間に向けて屈曲部を伸ばすことができる。このため、各段階の押圧に必要な成形荷重を抑制でき、より一層、順送型のプレス成形により屈曲部材を成形し易くなる。 According to the above configuration, in the first stage pressing using the first inner mold, the tip of the bent portion is pressed by the end face, so that the material of the bent portion is effectively moved toward the corner of the mold. be able to. For this reason, sag can be suppressed suitably. Further, in the second stage pressing using the second inner mold, the tip of the bent part is not pressed, and the bent part can be extended toward the space between the second inner mold and the outer mold. . For this reason, the forming load required for each stage of pressing can be suppressed, and the bent member can be more easily formed by progressive die press forming.
また、本開示の一態様では、内側金型として、第１内側金型と第２内側金型とが用いられてもよい。また、外側金型と第１内側金型とにより対象板材を押圧した後、外側金型と第２内側金型とにより対象板材を押圧してもよい。また、第１内側金型は、さらに端面を有してもよい。また、対象板材を押圧する際、端面は、屈曲部の先端に当接してもよい。また、対象板材を押圧する際、第２内側金型は、傾斜面の突出側に、屈曲部の先端が金型に当接しないようにするための空間を、外側金型との間に成形してもよい。 In one embodiment of the present disclosure, a first inner mold and a second inner mold may be used as the inner mold. Further, after the target plate is pressed by the outer die and the first inner die, the target plate may be pressed by the outer die and the second inner die. Further, the first inner mold may further have an end face. Further, when pressing the target plate material, the end surface may abut on the tip of the bent portion. Also, when pressing the target plate material, the second inner mold forms a space between the outer mold and the projecting side of the inclined surface so that the tip of the bent portion does not contact the mold. May be.
上記構成であっても、同様にして、第１内側金型を用いた１段階目の押圧と、第２内側金型を用いた２段階目の押圧とに必要な成形荷重を抑制できる。その結果、より一層、順送型のプレス成形により屈曲部材を成形し易くなる。 Even in the above configuration, similarly, the molding load required for the first-stage pressing using the first inner mold and the second-stage pressing using the second inner mold can be suppressed. As a result, the bending member can be more easily formed by progressive press forming.
また、本開示の一態様では、屈曲部とは、屈曲部材を貫通する孔を囲むバーリング状の部位であってもよい。
バーリング部材における外側角部は、上述したバーリング角部に相当する。上記構成によれば、バーリング角部のダレを抑制しながら、順送型のプレス成形によりバーリング部材を成形可能となる。
In one aspect of the present disclosure, the bent portion may be a burring-shaped portion surrounding a hole that passes through the bent member.
The outer corners of the burring member correspond to the burring corners described above. According to the above configuration, it is possible to form the burring member by progressive press forming while suppressing sagging of the burring corner.
また、本開示の一態様では、屈曲部材の接合面は、他の部材に接合するよう構成されていてもよい。なお、接合面とは、孔の周囲に位置する面であって、屈曲部が突出する側の反対側に位置する面である。 In one embodiment of the present disclosure, the joint surface of the bending member may be configured to be joined to another member. The joining surface is a surface located around the hole, and is a surface located on a side opposite to a side where the bent portion protrudes.
上記構成によれば、バーリング角部の周囲に、他の部材との接合面が成形される。そして、バーリング角部のダレが抑制されているため、接合面と他の部材との隙間を良好にシールすることが可能となる。 According to the above configuration, a joint surface with another member is formed around the burring corner. And since the sagging of the burring corner is suppressed, it becomes possible to seal the gap between the joining surface and the other members satisfactorily.
また、本開示の一態様では、板材は、ステンレスにより構成されてもよい。
上記構成によれば、ステンレスから構成される屈曲部材における外側角部のダレを抑制しながら、順送型のプレス成形により屈曲部材を成形可能となる。
In one embodiment of the present disclosure, the plate member may be made of stainless steel.
According to the above configuration, it is possible to form the bent member by progressive press forming while suppressing sagging of the outer corners of the bent member made of stainless steel.
以下、本開示の実施形態について図面を用いて説明する。なお、本開示の実施の形態は、下記の実施形態に何ら限定されることはなく、本開示の技術的範囲に属する限り種々の形態を採りうる。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The embodiments of the present disclosure are not limited to the embodiments described below, and may take various forms as long as they belong to the technical scope of the present disclosure.
［構成について］
図１，２に示すように、本実施形態のバーリング部材１は、本体部１０と、バーリング部１１と、孔１２と、配置部１３とを有する。
[About configuration]
As shown in FIGS. 1 and 2, the burring member 1 of the present embodiment has a main body 10, a burring 11, a hole 12, and an arrangement 13.
本体部１０は、平板状に広がる部位であり、中央に円形又は略円形の孔１２が成形されている。孔１２は、厚さ方向に本体部１０を貫通する。以後、孔１２の中心を通過し、本体部１０に直交する直線を、中心線１６と記載する。 The main body 10 is a portion that spreads in a flat plate shape, and a circular or substantially circular hole 12 is formed in the center. The hole 12 penetrates the main body 10 in the thickness direction. Hereinafter, a straight line passing through the center of the hole 12 and orthogonal to the main body 10 is referred to as a center line 16.
バーリング部１１は、孔１２の縁から中心線１６に沿った突出方向１４に突出するフランジ状の部位である。バーリング部１１は、孔１２を囲む。
配置部１３は、後述するガスケットが配置される窪み状の部位である。配置部１３は、孔１２に隣接し、且つ、囲んだ状態で、本体部１０におけるバーリング部１１の反対側の面（以後、接合面１５）に設けられる。
The burring portion 11 is a flange-shaped portion that protrudes from the edge of the hole 12 in the protruding direction 14 along the center line 16. The burring portion 11 surrounds the hole 12.
The arranging portion 13 is a concave portion in which a gasket described later is arranged. The arranging portion 13 is provided on a surface of the main body 10 opposite to the burring portion 11 (hereinafter, a joining surface 15) in a state of being adjacent to and surrounding the hole 12.
バーリング部材１は、一例として、車両に搭載された排気部材における、排気が通過する開口に取り付けられる。なお、排気部材とは、エンジンからの排気を流下させる排気管又はマフラ等の部材である。バーリング部材１の接合面１５は、孔１２と排気部材の開口とが接続した状態で、例えばボルト等により排気部材に接合される。なお、バーリング部材１は、車両に搭載される他の部材に取り付けられても良い。 As an example, the burring member 1 is attached to an opening through which exhaust gas passes in an exhaust member mounted on a vehicle. Note that the exhaust member is a member such as an exhaust pipe or a muffler that allows exhaust gas from the engine to flow down. The joint surface 15 of the burring member 1 is joined to the exhaust member by, for example, a bolt or the like in a state where the hole 12 and the opening of the exhaust member are connected. The burring member 1 may be attached to another member mounted on the vehicle.
ここで、バーリング部材１の接合面１５と排気部材との隙間からの排気の流出を抑制することが求められる。このため、配置部１３にガスケットが配置され、接合面１５と排気部材とによりガスケットが挟まれた状態で、接合面１５と排気部材とが接合される。これにより、接合面１５と排気部材との隙間がシールされる。 Here, it is required to suppress the outflow of exhaust gas from the gap between the joining surface 15 of the burring member 1 and the exhaust member. For this reason, the gasket is arranged in the arrangement portion 13, and the joint surface 15 and the exhaust member are joined in a state where the gasket is sandwiched between the joint surface 15 and the exhaust member. Thereby, the gap between the joint surface 15 and the exhaust member is sealed.
なお、図３に示すように、バーリング部材１は、配置部１３を有さない構成としても良い。この場合、接合面１５における孔１２の周囲にシール剤を塗布し、シール剤を挟んで接合面１５と排気部材とが接合されても良い。 In addition, as shown in FIG. 3, the burring member 1 may be configured to have no arrangement portion 13. In this case, a sealant may be applied around the hole 12 on the joint surface 15 and the joint surface 15 and the exhaust member may be joined with the sealant interposed therebetween.
［バーリング部材の製造方法］
本実施形態のバーリング部材１は、中央に円形又は略円形の孔が成形された板材に対し第１〜第５工程を施すことで製造される。孔は、厚さ方向に板材を貫通する。
[Method of manufacturing burring member]
The burring member 1 of the present embodiment is manufactured by performing the first to fifth steps on a plate material having a circular or substantially circular hole formed in the center. The hole penetrates the plate in the thickness direction.
板材は、面圧の高い金属の材料で構成されている。面圧の高い材料とは、プレス成形の際に、相対的に高い面圧を加える必要がある材料を意味する。該板材に厚さ方向の荷重が加えられた際、板材を構成する材料は、まず、荷重が加えられた位置から離れるように面に沿って移動し、その後厚さ方向に移動する。つまり、該材料は、面に沿って移動し易く、厚さ方向に移動し難いという特性を有している。具体的には、該材料とは、例えば、ステンレスであっても良い。より詳しくは、該材料は、例えば、ＪＩＳ規格におけるＳＵＳ４００系のステンレスであっても良い。 The plate is made of a metal material having a high surface pressure. The material having a high surface pressure means a material that needs to apply a relatively high surface pressure during press molding. When a load in the thickness direction is applied to the plate material, the material constituting the plate material first moves along the surface away from the position where the load is applied, and then moves in the thickness direction. That is, the material has a property that it is easy to move along the surface and hard to move in the thickness direction. Specifically, the material may be, for example, stainless steel. More specifically, the material may be, for example, SUS400 stainless steel according to the JIS standard.
なお、板材を構成する面圧の高い材料は、バーリング部材の用途等に応じて適宜選択され得る。具体的には、板材は、例えば、ＳＵＳ４００系以外のステンレス、鉄、アルミ、又は、アルミ合金等により構成されていても良い。また、板材は、面圧の高い金属の材料以外の材料により構成されていても良い。 In addition, the material having a high surface pressure constituting the plate material can be appropriately selected according to the use of the burring member and the like. Specifically, the plate material may be made of, for example, stainless steel, iron, aluminum, an aluminum alloy, or the like other than SUS400. Further, the plate material may be made of a material other than a metal material having a high surface pressure.
以下では、第１〜第５工程について説明する。なお、各工程で用いられる金型の各面の境界には、丸みが設けられている。
［第１工程］
図４，５が示すように、第１工程では、孔２０を有する板材２に対し、第１押圧金型３０と、第１及び第２固定金型３１，３２とを用いたプレス成形が行われる。これにより、孔２０の縁に第１屈曲部２２が成形される。第１屈曲部２２は、孔２０を囲み、板材２の本体部２３の縁から下側に突出している。
Hereinafter, the first to fifth steps will be described. In addition, roundness is provided at the boundary of each surface of the mold used in each step.
[First step]
As shown in FIGS. 4 and 5, in the first step, press forming using a first pressing mold 30 and first and second fixed dies 31 and 32 is performed on the plate material 2 having the holes 20. Is Thereby, the first bent portion 22 is formed at the edge of the hole 20. The first bent portion 22 surrounds the hole 20 and protrudes downward from the edge of the main body 23 of the plate 2.
第１工程では、まず、水平に配置された板材２の両面が第１及び第２固定金型３１，３２により挟まれ、各面が各金型により上下方向３に押圧される。この時、板材２の外縁２８は金型に当接せず、逃された状態となる。 In the first step, first, both surfaces of the horizontally arranged plate member 2 are sandwiched between the first and second fixed molds 31 and 32, and each surface is pressed in the up-down direction 3 by each mold. At this time, the outer edge 28 of the plate 2 does not come into contact with the mold, and is in a state of being escaped.
第１固定金型３１は、板材２の上側に配置され、第１押圧金型３０が通過する第１通過孔３１ａを有する。また、第１固定金型３１は、第１通過孔３１ａの周りに水平に広がり、板材２を押圧する主面３１ｂを有する。 The first fixed mold 31 is disposed above the plate member 2 and has a first passage hole 31a through which the first pressing mold 30 passes. Further, the first fixed mold 31 has a main surface 31b which spreads horizontally around the first passage hole 31a and presses the plate material 2.
一方、第２固定金型３２は、板材２の下側に配置され、第１押圧金型３０が通過する第２通過孔３２ａを有する。また、第２固定金型３２は、主面３２ｂと側面３２ｃとを有する。主面３２ｂは、第２通過孔３２ａの周りに水平に広がり、板材２を押圧する。また、側面３２ｃは、第２通過孔３２ａの側面をなし、主面３２ｂの縁から下側に延びる。なお、主面３２ｂと側面３２ｃとの境界には、丸みが設けられている。以後、該丸みが設けられた部分の外面を、湾曲面３２ｄと記載する。 On the other hand, the second stationary mold 32 is disposed below the plate member 2 and has a second passage hole 32a through which the first pressing mold 30 passes. The second fixed mold 32 has a main surface 32b and a side surface 32c. The main surface 32b spreads horizontally around the second passage hole 32a and presses the plate 2. The side surface 32c forms a side surface of the second passage hole 32a and extends downward from an edge of the main surface 32b. The boundary between the main surface 32b and the side surface 32c is rounded. Hereinafter, the outer surface of the rounded portion is referred to as a curved surface 32d.
また、第１及び第２固定金型３１，３２と板材２とは、第１，第２通過孔３１ａ，３２ａの縁と、孔２０の縁とが同心円状となるように配置される。第１通過孔３１ａは、第２通過孔３２ａよりも径が大きく、第２通過孔３２ａの縁は、第１通過孔３１ａの縁よりも内側に位置する。また、板材２が第１及び第２固定金型３１，３２により挟まれた際、板材２における対象部２１が、これらの金型からはみ出した状態となる。対象部２１とは、孔２０の縁に位置し、且つ、孔２０を囲む部分である。換言すれば、対象部２１は、これらの金型に当接しない状態となる。 Further, the first and second fixed dies 31, 32 and the plate member 2 are arranged such that the edges of the first and second passage holes 31a, 32a and the edge of the hole 20 are concentric. The first passage hole 31a has a larger diameter than the second passage hole 32a, and the edge of the second passage hole 32a is located inside the edge of the first passage hole 31a. Further, when the plate 2 is sandwiched between the first and second fixed dies 31 and 32, the target portion 21 of the plate 2 protrudes from these dies. The target portion 21 is a portion located at the edge of the hole 20 and surrounding the hole 20. In other words, the target portion 21 does not come into contact with these molds.
次に、第１押圧金型３０により第１屈曲部２２が成形される。第１押圧金型３０は、円柱状の金型であり、その径は、孔２０の径よりも大きく、第１通過孔３１ａの径よりも小さい。第１押圧金型３０は、底面を囲む傾斜面３０ａを有している。傾斜面３０ａにより、第１押圧金型３０の下端がテーパ状に成形される。第１押圧金型３０は、板材２の孔２０に向かって下側に移動する。この時、第１押圧金型３０の傾斜面３０ａが、対象部２１を下側に押圧する。該押圧により対象部２１が屈曲し、第１屈曲部２２が成形される。また、該押圧により、対象部２１に含まれる材料は下側に移動する。 Next, the first bent portion 22 is formed by the first pressing mold 30. The first pressing die 30 is a cylindrical die, and the diameter thereof is larger than the diameter of the hole 20 and smaller than the diameter of the first passage hole 31a. The first pressing mold 30 has an inclined surface 30a surrounding the bottom surface. The lower end of the first pressing mold 30 is formed into a tapered shape by the inclined surface 30a. The first pressing mold 30 moves downward toward the hole 20 of the plate material 2. At this time, the inclined surface 30a of the first pressing mold 30 presses the target portion 21 downward. The target portion 21 is bent by the pressing, and the first bent portion 22 is formed. Further, the material contained in the target portion 21 moves downward by the pressing.
また、第１工程の押圧の際、傾斜面３０ａと第２固定金型３２との間に逃し３０ｂ（換言すれば、空間）が設けられる。このため、第１屈曲部２２は逃し３０ｂに向かって延び、その先端２２ａは金型に当接しない。 Further, at the time of pressing in the first step, a relief 30b (in other words, a space) is provided between the inclined surface 30a and the second fixed mold 32. Therefore, the first bent portion 22 extends toward the relief 30b, and the tip end 22a does not come into contact with the mold.
［第２工程］
続く第２工程では、図６，７が示すように、第１屈曲部２２が成形された板材２に対し、第２押圧金型３３と、第１工程と同様の第１及び第２固定金型３１，３２とを用いたプレス成形が行われる。これにより、第１屈曲部２２から第２屈曲部２４が成形される。第２屈曲部２４は、第１屈曲部２２よりも下側に延び、第１屈曲部２２よりも薄い。
[Second step]
In the subsequent second step, as shown in FIGS. 6 and 7, the plate member 2 on which the first bent portion 22 has been formed is subjected to the second pressing mold 33 and the first and second fixed metal members similar to the first step. Press molding using the molds 31 and 32 is performed. Thereby, the second bent portion 24 is formed from the first bent portion 22. The second bent portion 24 extends below the first bent portion 22 and is thinner than the first bent portion 22.
第２工程では、まず、第１屈曲部２２が成形された板材２が、第１工程と同様、第１及び第２固定金型３１，３２により押圧された状態で配置される。この時、第１屈曲部２２は、第１及び第２固定金型３１，３２からはみ出した状態となる。 In the second step, first, the plate material 2 on which the first bent portion 22 is formed is placed in a state where the plate material 2 is pressed by the first and second fixed dies 31 and 32 as in the first step. At this time, the first bent portion 22 protrudes from the first and second fixed molds 31 and 32.
次に、第２押圧金型３３により第２屈曲部２４が成形される。第２押圧金型３３は、円柱状の金型であり、その径は孔２０の径よりも大きく、上下方向３に延びた状態で配置される。第２押圧金型３３は、第１面３３ａと、第２面３３ｂと、上側面３３ｃと、下面３３ｄとを有する。 Next, the second bent portion 24 is formed by the second pressing mold 33. The second pressing die 33 is a column-shaped die, the diameter of which is larger than the diameter of the hole 20, and is arranged so as to extend in the up-down direction 3. The second pressing mold 33 has a first surface 33a, a second surface 33b, an upper surface 33c, and a lower surface 33d.
上側面３３ｃは、第２押圧金型３３の側面をなし、第２押圧金型３３の上端から下側に延びる。
第１面３３ａは、上側面３３ｃの下側の縁から第２押圧金型３３の中央に向かって水平に広がる。第１面３３ａは、幅が一定であるリング状の面である。つまり、第２押圧金型３３の側面には、第１面３３ａにより段差が成形されており、第１面３３ａの下側の部分は、上側の部分によりも径が小さい。
The upper side surface 33c forms a side surface of the second pressing die 33, and extends downward from the upper end of the second pressing die 33.
The first surface 33a extends horizontally from the lower edge of the upper side surface 33c toward the center of the second pressing mold 33. The first surface 33a is a ring-shaped surface having a constant width. In other words, a step is formed on the side surface of the second pressing mold 33 by the first surface 33a, and the lower part of the first surface 33a has a smaller diameter than the upper part.
第２面３３ｂは、第２押圧金型３３の側面を成形し、第１面３３ａの内側の縁から下側に広がる。
下面３３ｄは、第２押圧金型３３の底部を成形する。
The second surface 33b forms the side surface of the second pressing die 33 and extends downward from the inner edge of the first surface 33a.
The lower surface 33d forms the bottom of the second pressing mold 33.
第２押圧金型３３は、第１工程と同様、板材２の孔２０に向かって下側に移動する。そして、第１及び第２面３３ａ，３３ｂにより、第１屈曲部２２を下側に押圧する。この時、第１面３３ａは第１屈曲部２２の上部を下側に押圧する。また、第２面３３ｂは、孔２０側から第１屈曲部２２に当接し、第１屈曲部２２が下側に延びるように促す。これにより、第１屈曲部２２は、更に屈曲すると共に下側に延び、第１屈曲部２２から第２屈曲部２４が成形される。また、これにより、第１屈曲部２２に含まれる材料が下側に移動する。 The second pressing mold 33 moves downward toward the hole 20 of the plate material 2 as in the first step. Then, the first bent portion 22 is pressed downward by the first and second surfaces 33a and 33b. At this time, the first surface 33a presses the upper portion of the first bent portion 22 downward. Also, the second surface 33b contacts the first bent portion 22 from the hole 20 side, and urges the first bent portion 22 to extend downward. Thus, the first bent portion 22 is further bent and extends downward, and the second bent portion 24 is formed from the first bent portion 22. Further, thereby, the material included in the first bent portion 22 moves downward.
また、第１面３３ａの押圧により、第２屈曲部２４の上面に、孔２０に隣接し、孔２０を囲む凹部２５が成形される。凹部２５は、上述した配置部１３に対応する部位である。つまり、第１工程で第１屈曲部２２を成形した後、第１屈曲部２２の上部を押圧することで凹部２５が成形される。このため、凹部２５を成形するための成形荷重が抑制される。また、第１面３３ａによる押圧により、第２押圧金型３３と第１固定金型３１との境界付近に位置する板材２の材料が、外縁２８側に移動する。 In addition, the depression of the first surface 33 a forms a concave portion 25 adjacent to the hole 20 and surrounding the hole 20 on the upper surface of the second bent portion 24. The concave portion 25 is a portion corresponding to the above-described arrangement portion 13. That is, after the first bent portion 22 is formed in the first step, the concave portion 25 is formed by pressing the upper portion of the first bent portion 22. Therefore, a forming load for forming the concave portion 25 is suppressed. In addition, the material of the plate member 2 located near the boundary between the second pressing mold 33 and the first fixed mold 31 moves to the outer edge 28 side by the pressing by the first surface 33a.
また、第２工程の押圧の際、第２面３３ｂと第２固定金型３２との間には、逃し３３ｅが設けられる。このため、第１屈曲部２２は逃し３０ｅに向かって延び、その先端２２ａが金型に当接しない。その結果、第２工程の成形荷重が抑制される。 Further, at the time of pressing in the second step, a relief 33e is provided between the second surface 33b and the second fixed mold 32. For this reason, the first bent portion 22 extends toward the relief 30e, and the tip end 22a does not contact the mold. As a result, the molding load in the second step is suppressed.
また、第２押圧金型３３による押圧により、第１屈曲部２２の内周側の部分は、第２固定金型３２の湾曲面３２ｄに向けて押圧される。これにより、第２屈曲部２４の内周側の部分に、湾曲面２４ｂが成形される。湾曲面２４ｂは、第２屈曲部２４の外周側に膨らむ弧状に湾曲している。 In addition, due to the pressing by the second pressing die 33, the inner peripheral portion of the first bent portion 22 is pressed toward the curved surface 32 d of the second fixed die 32. Thereby, the curved surface 24b is formed on the inner peripheral side portion of the second bent portion 24. The curved surface 24b is curved in an arc shape bulging to the outer peripheral side of the second bent portion 24.
［第３工程］
続く第３工程では、図８，９が示すように、第２屈曲部２４が成形された板材２に対し、第１内側金型３４と外側金型３５とを用いたプレス成形が行われる。第１内側金型３４は板材２の下側に、外側金型３５は板材２の上側に配置され、板材２は、これらの金型により上下方向３に押圧される。そして、第２屈曲部２４から第３屈曲部２６が成形される。第３屈曲部２６は、本体部２３の縁（換言すれば、孔２０の縁）から下側に突出する。
[Third step]
In the subsequent third step, as shown in FIGS. 8 and 9, press forming using the first inner mold 34 and the outer mold 35 is performed on the plate material 2 on which the second bent portion 24 is formed. The first inner mold 34 is disposed below the plate 2, and the outer mold 35 is disposed above the plate 2, and the plate 2 is pressed in the up-down direction 3 by these dies. Then, the third bent portion 26 is formed from the second bent portion 24. The third bent portion 26 protrudes downward from an edge of the main body 23 (in other words, an edge of the hole 20).
外側金型３５は、下側に突出する円柱部３５ａを有する。円柱部３５ａは、第２屈曲部２４を有する板材２の孔２０と同程度の径を有する。また、外側金型３５は、第１外側主面３５ｂと、第２外側主面３５ｃと、外側側面３５ｄと、下面３５ｅとを有する。また、第１外側主面３５ｂと外側側面３５ｄとの境界をなす部分を、金型角部３５ｇとする。 The outer mold 35 has a cylindrical portion 35a protruding downward. The cylindrical portion 35a has a diameter similar to that of the hole 20 of the plate 2 having the second bent portion 24. The outer mold 35 has a first outer main surface 35b, a second outer main surface 35c, an outer side surface 35d, and a lower surface 35e. In addition, a portion forming a boundary between the first outer main surface 35b and the outer side surface 35d is defined as a mold corner 35g.
第１外側主面３５ｂは、円柱部３５ａの根元から水平に広がるリング状の面である。また、第１外側主面３５ｂの外周縁には、上側への段差３５ｆが設けられている。
第２外側主面３５ｃは、段差３５ｆから水平に広がる。つまり、第２外側主面３５ｃは、第１外側主面３５ｂよりも上側に位置する。
The first outer main surface 35b is a ring-shaped surface that extends horizontally from the base of the cylindrical portion 35a. An upper step 35f is provided on the outer peripheral edge of the first outer main surface 35b.
The second outer main surface 35c extends horizontally from the step 35f. That is, the second outer main surface 35c is located above the first outer main surface 35b.
外側側面３５ｄは、円柱部３５ａの側面に相当する。外側側面３５ｄは、第１外側主面３５ｂの縁から下側に延びる。
下面３５ｅは、円柱部３５ａの底部を成形する。
The outer side surface 35d corresponds to the side surface of the cylindrical portion 35a. The outer side surface 35d extends downward from the edge of the first outer main surface 35b.
The lower surface 35e forms the bottom of the cylindrical portion 35a.
一方、第１内側金型３４は、外側金型３５の円柱部３５ａに応じた形状の円柱孔３４ａを有する。第３工程では、円柱部３５ａが円柱孔３４ａに挿入された状態で、第１内側金型３４及び外側金型３５により板材２が押圧される。 On the other hand, the first inner mold 34 has a cylindrical hole 34 a having a shape corresponding to the cylindrical portion 35 a of the outer mold 35. In the third step, the plate member 2 is pressed by the first inner mold 34 and the outer mold 35 in a state where the cylindrical portion 35a is inserted into the cylindrical hole 34a.
第１内側金型３４は、第１内側主面３４ｂと、傾斜面３４ｃと、段差面３４ｆと、端面３４ｄと、側面３４ｅとを有する。
第１内側主面３４ｂは、円柱孔３４ａの開口の周囲に水平に広がる。
The first inner mold 34 has a first inner main surface 34b, an inclined surface 34c, a step surface 34f, an end surface 34d, and a side surface 34e.
The first inner main surface 34b extends horizontally around the opening of the cylindrical hole 34a.
傾斜面３４ｃは、円柱孔３４ａの開口を囲むリング状の面であり、第１内側主面３４ｂの縁から平面状に広がる。また、傾斜面３４ｃは、下側に向かうに従い外側側面３５ｄ（換言すれば、円柱孔３４ａ）に接近するように上下方向３に対し傾斜している。つまり、第３工程での押圧の際、傾斜面３４ｃは、金型角部３５ｇに向かう状態になる。以後、傾斜面３４ｃが上下方向３に対して傾斜する角度を、第１傾斜角度３４ｇとする。 The inclined surface 34c is a ring-shaped surface surrounding the opening of the cylindrical hole 34a, and extends in a plane from the edge of the first inner main surface 34b. The inclined surface 34c is inclined with respect to the up-down direction 3 so as to approach the outer side surface 35d (in other words, the cylindrical hole 34a) as going downward. That is, at the time of pressing in the third step, the inclined surface 34c is in a state toward the die corner 35g. Hereinafter, the angle at which the inclined surface 34c is inclined with respect to the vertical direction 3 is referred to as a first inclined angle 34g.
段差面３４ｆは、傾斜面３４ｃの下側の縁から下側に延びる。
端面３４ｄは、段差面３４ｆの下側の縁から、円柱孔３４ａに挿入された円柱部３５ａの外側側面３５ｄに向かって水平に広がる。
The step surface 34f extends downward from the lower edge of the inclined surface 34c.
The end surface 34d extends horizontally from the lower edge of the step surface 34f toward the outer side surface 35d of the cylindrical portion 35a inserted into the cylindrical hole 34a.
側面３４ｅは、端面３４ｄの縁から下側に延びる。なお、側面３４ｅと外側金型３５との間に隙間が設けられていている。しかし、側面３４ｅは、外側金型３５に当接していても良い。 The side surface 34e extends downward from the edge of the end surface 34d. Note that a gap is provided between the side surface 34e and the outer mold 35. However, the side surface 34e may be in contact with the outer mold 35.
第３工程では、外側金型３５の第１及び第２外側主面３５ｂ，３５ｃと、第１内側金型３４の第１内側主面３４ｂとにより、板材２の本体部２３の両面が押圧される。この時、第１，２工程と同様、板材２の外縁２８は逃された状態となる。これにより、成形荷重が抑制される。 In the third step, both surfaces of the main body 23 of the plate 2 are pressed by the first and second outer main surfaces 35b and 35c of the outer mold 35 and the first inner main surface 34b of the first inner mold 34. You. At this time, as in the first and second steps, the outer edge 28 of the plate 2 is in a state of being escaped. Thereby, the molding load is suppressed.
また、金型角部３５ｇは、第２屈曲部２４の外周側に位置する。また、外側側面３５ｄは、第２屈曲部２４の孔２０側の部分に当接する。また、第１外側主面３５ｂは、第２屈曲部２４の上部を下側に押圧する。これにより、凹部２５が成形される。また、第１外側主面３５ｂによる押圧により、段差３５ｆの付近に位置する板材２の材料が、外縁２８側に移動する。 The mold corner 35 g is located on the outer peripheral side of the second bent portion 24. Further, the outer side surface 35d contacts the portion of the second bent portion 24 on the hole 20 side. Further, the first outer main surface 35b presses the upper portion of the second bent portion 24 downward. Thereby, the concave portion 25 is formed. Further, the material of the plate member 2 located near the step 35f moves toward the outer edge 28 by the pressing by the first outer main surface 35b.
また、傾斜面３４ｃ及び段差面３４ｆは、第２屈曲部２４における孔２０の反対側の部分を押圧する。より詳しくは、傾斜面３４ｃは、第２屈曲部２４を挟んで外側側面３５ｄに対面し、第２屈曲部２４の内周側の湾曲面２４ｂを、金型角部３５ｇに向けて押圧する。なお、湾曲面２４ｂの全域が傾斜面３４ｃにより押圧されても良い。この時、端面３４ｄは、第２屈曲部２４の先端２４ａを上側に押圧する。 In addition, the inclined surface 34c and the step surface 34f press a portion of the second bent portion 24 opposite to the hole 20. More specifically, the inclined surface 34c faces the outer side surface 35d with the second bent portion 24 interposed therebetween, and presses the curved surface 24b on the inner peripheral side of the second bent portion 24 toward the die corner 35g. Note that the entire area of the curved surface 24b may be pressed by the inclined surface 34c. At this time, the end face 34d presses the tip 24a of the second bent portion 24 upward.
これにより、第２屈曲部２４の材料が金型角部３５ｇに向かって移動し、第２屈曲部２４から第３屈曲部２６が成形される。その結果、板材２の孔２０の縁における上側の角部であるバーリング角部２９のダレ（換言すれば、バーリング角部２９の丸み）を抑制しつつ、第３屈曲部２６が成形される。 Thereby, the material of the second bent portion 24 moves toward the mold corner 35 g, and the third bent portion 26 is formed from the second bent portion 24. As a result, the third bent portion 26 is formed while suppressing dripping of the burring corner 29 (in other words, rounding of the burring corner 29) which is the upper corner at the edge of the hole 20 of the plate 2.
［第４工程］
続く第４工程では、図１０，１１が示すように、第３屈曲部２６が成形された板材２に対し、第２内側金型３６と、上述した外側金型３５とを用いたプレス成形が行われる。第２内側金型３６は板材２の下側に、外側金型３５は板材２の上側に配置され、板材２は、これらの金型により上下方向３に押圧される。そして、第３屈曲部２６から第４屈曲部２７が成形される。第４屈曲部２７は、本体部２３の縁から下側に突出する。
[Fourth step]
In the subsequent fourth step, as shown in FIGS. 10 and 11, the plate material 2 on which the third bent portion 26 is formed is subjected to press forming using the second inner mold 36 and the outer mold 35 described above. Done. The second inner mold 36 is disposed below the plate 2, and the outer mold 35 is disposed above the plate 2, and the plate 2 is pressed in the up-down direction 3 by these dies. Then, the fourth bent portion 27 is formed from the third bent portion 26. The fourth bent portion 27 projects downward from the edge of the main body 23.
第２内側金型３６は、外側金型３５の円柱部３５ａに応じた形状の円柱孔３６ａを有する。第４工程では、円柱部３５ａが円柱孔３６ａに挿入された状態で、第２内側金型３６及び外側金型３５により板材２が押圧される。 The second inner mold 36 has a cylindrical hole 36 a having a shape corresponding to the cylindrical portion 35 a of the outer mold 35. In the fourth step, the plate member 2 is pressed by the second inner mold 36 and the outer mold 35 with the cylindrical portion 35a inserted into the cylindrical hole 36a.
第２内側金型３６は、第２内側主面３６ｂと、傾斜面３６ｃと、側面３６ｄとを有する。
第２内側主面３６ｂは、円柱孔３６ａの開口の周囲に水平に広がる。
The second inner mold 36 has a second inner main surface 36b, an inclined surface 36c, and a side surface 36d.
The second inner main surface 36b extends horizontally around the opening of the cylindrical hole 36a.
傾斜面３６ｃは、円柱孔３６ａの開口に隣接し、且つ、該開口を囲む面であり、第２内側主面３６ｂの縁から平面状に広がる。また、傾斜面３６ｃは、下側に向かうに従い外側側面３５ｄ（換言すれば、円柱孔３６ａ）に接近するように上下方向３に対し傾斜している。つまり、第４工程での押圧の際、傾斜面３６ｃは、金型角部３５ｇに向かう状態になる。以後、傾斜面３６ｃが上下方向３に対して傾斜する角度を、第２傾斜角度３６ｆとする。なお、第２傾斜角度３６ｆは、一例として、１３６°以上１６０°以下であっても良い。また、上述した第１傾斜角度３４ｇは、第２傾斜角度３６ｆよりも大きい。 The inclined surface 36c is a surface adjacent to the opening of the cylindrical hole 36a and surrounding the opening, and spreads planarly from the edge of the second inner main surface 36b. The inclined surface 36c is inclined with respect to the up-down direction 3 so as to approach the outer side surface 35d (in other words, the cylindrical hole 36a) as going downward. That is, at the time of pressing in the fourth step, the inclined surface 36c is in a state of going to the mold corner 35g. Hereinafter, the angle at which the inclined surface 36c is inclined with respect to the vertical direction 3 is referred to as a second inclined angle 36f. The second inclination angle 36f may be, for example, 136 ° or more and 160 ° or less. Further, the above-described first inclination angle 34g is larger than the second inclination angle 36f.
側面３６ｄは、傾斜面３６ｃの縁から下側に延びる。
第４工程でのプレス成形では、外側金型３５の第１及び第２外側主面３５ｂ，３５ｃと、第２内側金型３６の第２内側主面３６ｂとにより、板材２の本体部２３の両面が押圧される。この時、第１〜３工程と同様、板材２の外縁２８は逃された状態となる。これにより、成形荷重が抑制される。
The side surface 36d extends downward from the edge of the inclined surface 36c.
In the press forming in the fourth step, the first and second outer main surfaces 35b and 35c of the outer die 35 and the second inner main surface 36b of the second inner die 36 form the main body portion 23 of the plate 2. Both sides are pressed. At this time, as in the first to third steps, the outer edge 28 of the plate 2 is in a state of being released. Thereby, the molding load is suppressed.
また、金型角部３５ｇは、第３屈曲部２６の外周側に位置する。また、外側側面３５ｄは、第３屈曲部２６の孔２０側の部分に当接する。また、第１外側主面３５ｂは、第３屈曲部２６の上部を下側に押圧する。これにより、凹部２５が成形される。また、傾斜面３６ｃは、第３屈曲部２６における孔２０の反対側の部分を押圧する。より詳しくは、傾斜面３６ｃは、第３屈曲部２６を挟んで外側側面３５ｄに対面し、第３屈曲部２６の内周側の部分を、金型角部３５ｇに向けて押圧する。 The mold corner 35 g is located on the outer peripheral side of the third bent portion 26. Further, the outer side surface 35d contacts the portion of the third bent portion 26 on the hole 20 side. Further, the first outer main surface 35b presses the upper portion of the third bent portion 26 downward. Thereby, the concave portion 25 is formed. The inclined surface 36c presses a portion of the third bent portion 26 opposite to the hole 20. More specifically, the inclined surface 36c faces the outer side surface 35d with the third bent portion 26 interposed therebetween, and presses the inner peripheral portion of the third bent portion 26 toward the die corner 35g.
これにより、第３屈曲部２６の材料が金型角部３５ｇに向かって移動し、第３屈曲部２６から第４屈曲部２７が成形される。その結果、バーリング角部２９のダレを抑制しつつ、第４屈曲部２７が成形される。 As a result, the material of the third bent portion 26 moves toward the mold corner 35g, and the fourth bent portion 27 is formed from the third bent portion 26. As a result, the fourth bent portion 27 is formed while suppressing sagging of the burring corner 29.
また、第２内側金型３６の側面３６ｄと、外側金型３５との間には、逃し３６ｅ（換言すれば、空間）が設けられる。このため、第３屈曲部２６の先端２６ａは、金型に当接せず、逃し３０ｅに向かって延びる。これにより、第４工程の成形荷重が抑制される。 A relief 36e (in other words, a space) is provided between the side surface 36d of the second inner mold 36 and the outer mold 35. For this reason, the tip 26a of the third bent portion 26 extends toward the relief 30e without contacting the mold. Thereby, the molding load in the fourth step is suppressed.
［第５工程］
続く第５工程では、図１２，１３が示すように、第４屈曲部２７が成形された板材２に対し、第３内側金型３７と、上述した外側金型３５とを用いたプレス成形が行われる。第３内側金型３７は板材２の下側に、外側金型３５は板材２の上側に配置され、板材２は、これらの金型により上下方向３に押圧される。そして、板材２からバーリング部材１が成形される。つまり、第４屈曲部２７からバーリング部１１が成形され、バーリング部１１は、本体部１０の縁（換言すれば、孔１２の縁）から下側に突出する。
[Fifth step]
In the subsequent fifth step, as shown in FIGS. 12 and 13, the plate material 2 on which the fourth bent portion 27 is formed is subjected to press forming using the third inner mold 37 and the outer mold 35 described above. Done. The third inner mold 37 is disposed below the plate 2, and the outer mold 35 is disposed above the plate 2, and the plate 2 is pressed in the up-down direction 3 by these dies. Then, the burring member 1 is formed from the plate material 2. That is, the burring portion 11 is formed from the fourth bent portion 27, and the burring portion 11 projects downward from the edge of the main body 10 (in other words, the edge of the hole 12).
第３内側金型３７は、外側金型３５の円柱部３５ａに応じた形状の円柱孔３７ａを有する。第５工程では、円柱部３５ａが円柱孔３７ａに挿入された状態で、第３内側金型３７及び外側金型３５により板材２が押圧される。 The third inner mold 37 has a cylindrical hole 37 a having a shape corresponding to the cylindrical portion 35 a of the outer mold 35. In the fifth step, the plate member 2 is pressed by the third inner mold 37 and the outer mold 35 with the cylindrical portion 35a inserted into the cylindrical hole 37a.
第３内側金型３７は、第３内側主面３７ｂと、傾斜面３７ｃと、側面３７ｄとを有する。
第３内側主面３７ｂは、円柱孔３７ａの開口の周囲に水平に広がる。
The third inner mold 37 has a third inner main surface 37b, an inclined surface 37c, and a side surface 37d.
The third inner main surface 37b extends horizontally around the opening of the cylindrical hole 37a.
傾斜面３７ｃは、円柱孔３７ａの開口を囲むリング状の面であり、第３内側主面３７ｂの縁から平面状に広がる。また、傾斜面３７ｃは、下側に向かうに従い外側側面３５ｄ（換言すれば、円柱孔３７ａ）に接近するように上下方向３に対し傾斜している。つまり、第５工程での押圧の際、傾斜面３７ｃは、金型角部３５ｇに向かう状態になる。以後、傾斜面３７ｃが上下方向３に対して傾斜する角度を、第３傾斜角度３７ｅとする。第３傾斜角度３７ｅは、上述した第２傾斜角度３６ｆよりも大きい。 The inclined surface 37c is a ring-shaped surface surrounding the opening of the cylindrical hole 37a, and extends in a plane from the edge of the third inner main surface 37b. The inclined surface 37c is inclined with respect to the up-down direction 3 so as to approach the outer side surface 35d (in other words, the cylindrical hole 37a) as going downward. That is, at the time of pressing in the fifth step, the inclined surface 37c is in a state toward the die corner 35g. Hereinafter, the angle at which the inclined surface 37c is inclined with respect to the vertical direction 3 is referred to as a third inclined angle 37e. The third inclination angle 37e is larger than the above-described second inclination angle 36f.
側面３７ｄは、傾斜面３７ｃの縁から下側に延びる。
第５工程でのプレス成形では、外側金型３５の第１及び第２外側主面３５ｂ，３５ｃと、第３内側金型３７の第３内側主面３７ｂとにより、板材２の本体部２３の両面が押圧される。この時、第１〜４工程と同様、板材２の外縁２８は逃された状態となる。これにより、成形荷重が抑制される。
The side surface 37d extends downward from the edge of the inclined surface 37c.
In the press forming in the fifth step, the first and second outer main surfaces 35b and 35c of the outer die 35 and the third inner main surface 37b of the third inner die 37 are used to form the main body portion 23 of the plate 2. Both sides are pressed. At this time, as in the first to fourth steps, the outer edge 28 of the plate material 2 is in a state of being escaped. Thereby, the molding load is suppressed.
また、外側側面３５ｄは、第４屈曲部２７の孔２０側の部分に当接する。また、第１外側主面３５ｂは、第４屈曲部２７の上部を下側に押圧する。これにより、凹部２５から配置部１３が成形される。また、傾斜面３７ｃは、第４屈曲部２７における孔２０の反対側の部分を押圧する。より詳しくは、傾斜面３７ｃは、第４屈曲部２７を挟んで外側側面３５ｄに対面し、第４屈曲部２７を金型角部３５ｇに向けて押圧する。これにより、第４屈曲部２７の材料が金型角部３５ｇに向かって移動する。また、第４屈曲部２７の材料は、傾斜面３７ｃに沿って上側に移動する。 Further, the outer side surface 35d contacts the portion of the fourth bent portion 27 on the hole 20 side. Further, the first outer main surface 35b presses the upper portion of the fourth bent portion 27 downward. Thereby, the arrangement portion 13 is formed from the concave portion 25. The inclined surface 37c presses a portion of the fourth bent portion 27 on the opposite side of the hole 20. More specifically, the inclined surface 37c faces the outer side surface 35d across the fourth bent portion 27, and presses the fourth bent portion 27 toward the die corner 35g. Thereby, the material of the fourth bent portion 27 moves toward the mold corner 35g. Further, the material of the fourth bent portion 27 moves upward along the inclined surface 37c.
［その他］
バーリング部材１に配置部１３が設けられていない場合には、第１〜第５工程の一部を、次のように変更しても良い。すなわち、第２工程では、押圧時の第２押圧金型３３の位置を上側にすることで、凹部２５が成形されないようにしても良い。また、第３〜第５工程に関しては、外側金型３５を、第１外側主面３５ｂと第２外側主面３５ｃとが面一な（換言すれば、段差３５ｆを有さない）構成としても良い。これにより、第３〜５工程で凹部２５が成形されないようにしても良い。
[Others]
When the arrangement portion 13 is not provided on the burring member 1, a part of the first to fifth steps may be changed as follows. That is, in the second step, the position of the second pressing mold 33 at the time of pressing may be set to the upper side so that the concave portion 25 may not be formed. Regarding the third to fifth steps, the outer mold 35 may be configured such that the first outer main surface 35b and the second outer main surface 35c are flush (in other words, do not have the step 35f). good. Thus, the recess 25 may not be formed in the third to fifth steps.
［効果］
（１）上記実施形態の板材は、面圧の高い金属の材料で構成されている。上述したように、該材料は、プレス成形の際、板材の面に沿って移動し易く、板材の厚さ方向に移動し難いという特性を有している。このため、プレス成形により板材にバーリング部を成形する際、例えば、バーリング部が高い場合や、板材が薄い場合等には、仮にバーリング部の先端を押圧したとしても、材料をバーリング角部まで十分に移動させるのが困難であった。このため、バーリング角部にダレが生じる場合があり、例えば、プレス成形の成形荷重を大きくしたり、鍛造や切削等を行ったりすることで、バーリング角部のダレを抑制する必要があった。しかし、このような手段を適用すると、順送型のプレス成形による製造が困難となり、製造コストが増加する恐れがある。
[effect]
(1) The plate material of the above embodiment is made of a metal material having a high surface pressure. As described above, the material has such characteristics that it is easy to move along the surface of the plate at the time of press forming, and is hard to move in the thickness direction of the plate. For this reason, when forming the burring portion on the plate material by press molding, for example, when the burring portion is high or the plate material is thin, even if the tip of the burring portion is pressed, the material is sufficiently reduced to the burring corner. It was difficult to move to. For this reason, sagging may occur at the burring corners. For example, it is necessary to suppress the sagging of the burring corners by increasing the forming load of press forming, forging, cutting, or the like. However, if such a means is applied, manufacturing by progressive press molding becomes difficult, and the manufacturing cost may increase.
これに対し、上記実施形態によれば、第３，第４工程では、屈曲部が既に設けられた板材２を内側金型と外側金型とにより挟んで押圧する。このため、各工程における成形荷重を抑制でき、順送型のプレス成形により屈曲部を成形することが可能となる。 On the other hand, according to the above-described embodiment, in the third and fourth steps, the plate member 2 provided with the bent portion is sandwiched between the inner mold and the outer mold and pressed. For this reason, the forming load in each step can be suppressed, and the bent portion can be formed by progressive die press forming.
また、第３，第４工程の押圧の際、第１，第２内側金型３４，３６の各傾斜面は、第２又は第３屈曲部２４，２６の内周側を押圧し、屈曲部に含まれる材料を金型角部３５ｇに向けて移動させる。さらにこの時、板材２の本体部２３は、第１又は第２内側金型３４，３６と外側金型３５とにより両面から押圧される。このため、これらの屈曲部の材料が本体部２３に移動するのが抑制され、金型角部３５ｇへの材料の移動がさらに促される。これにより、金型角部３５ｇの付近に効果的に材料を移動させながら、板材２における金型角部３５ｇに当接する部分に、バーリング角部２９を成形できる。 Further, at the time of pressing in the third and fourth steps, the respective inclined surfaces of the first and second inner molds 34 and 36 press the inner peripheral sides of the second or third bent portions 24 and 26 to form bent portions. Is moved toward the mold corner 35g. Further, at this time, the main body 23 of the plate member 2 is pressed from both sides by the first or second inner molds 34 and 36 and the outer mold 35. Therefore, the movement of the material of these bent portions to the main body 23 is suppressed, and the movement of the material to the mold corner 35g is further promoted. Thus, the burring corner 29 can be formed at the portion of the plate 2 that comes into contact with the mold corner 35g while effectively moving the material near the mold corner 35g.
したがって、バーリング角部２９のダレを抑制しながら、順送型のプレス成形によりバーリング部材１を成形可能となる。
（２）また、第３工程では、第２工程にて第２屈曲部２４が成形された板材２を、第１内側金型３４と外側金型３５とにより挟んで押圧する。このため、各工程における成形荷重を抑制できる。
Therefore, the burring member 1 can be formed by progressive press forming while suppressing the sagging of the burring corner 29.
(2) In the third step, the plate material 2 on which the second bent portion 24 is formed in the second step is sandwiched and pressed between the first inner mold 34 and the outer mold 35. For this reason, the molding load in each step can be suppressed.
（３）また、第３工程では、第１内側金型３４の傾斜面３４ｃは、第２屈曲部２４の湾曲面２４ｂを押圧する。これにより、材料が金型角部３５ｇに向かって移動し易くなり、より一層、ダレを抑制できると共に、第３工程の成形荷重を抑制できる。 (3) In the third step, the inclined surface 34c of the first inner mold 34 presses the curved surface 24b of the second bent portion 24. This makes it easier for the material to move toward the corner 35g of the mold, so that the sag can be further suppressed and the forming load in the third step can be suppressed.
（４）また、第１内側金型３４の傾斜面３４ｃは、第２内側金型３６の傾斜面３６ｃに比べ、上下方向３に対する傾斜が大きく、より大きな成形荷重を生じ易い。このため、第３工程にて、第２屈曲部２４の内側の材料を、バーリング角部２９に向けて十分に移動させることができる。そして、第４工程で、材料がバーリング角部２９に向かって移動するよう促しながら、第３屈曲部２６を上下方向３に延ばすことができる。このため、ダレを効果的に抑制しながら、第３，４工程の各々に必要な成形荷重を抑制でき、より一層、順送型のプレス成形によりバーリング部材１を成形し易くなる。 (4) The inclined surface 34c of the first inner mold 34 has a larger inclination with respect to the up-down direction 3 than the inclined surface 36c of the second inner mold 36, so that a larger forming load is easily generated. Therefore, the material inside the second bent portion 24 can be sufficiently moved toward the burring corner 29 in the third step. Then, in the fourth step, the third bent portion 26 can be extended in the up-down direction 3 while urging the material to move toward the burring corner 29. For this reason, the forming load required for each of the third and fourth steps can be suppressed while effectively suppressing the sag, and the burring member 1 can be more easily formed by the progressive press forming.
（５）また、第３工程では、端面３４ｄにより第２屈曲部２４の先端２４ａが押圧されるため、バーリング角部２９に向けて材料を効果的に移動させることができる。また、第４工程では、第３屈曲部２６の先端２６ａが押圧されず、逃し３６ｅに向けて第３屈曲部２６を伸ばすことができる。このため、各構成の成形荷重を抑制でき、その結果、順送型のプレス成形によるバーリング部材１の製造が可能となる。このため、第３，４工程の各々に必要な成形荷重を抑制でき、より一層、順送型のプレス成形によりバーリング部材１を成形し易くなる。 (5) In the third step, the end 24a of the second bent portion 24 is pressed by the end face 34d, so that the material can be effectively moved toward the burring corner 29. In the fourth step, the tip 26a of the third bent portion 26 is not pressed, and the third bent portion 26 can be extended toward the escape 36e. For this reason, the forming load of each component can be suppressed, and as a result, the burring member 1 can be manufactured by progressive press forming. For this reason, the forming load required for each of the third and fourth steps can be suppressed, and the burring member 1 can be more easily formed by progressive press forming.
（６）また、バーリング角部２９のダレが抑制されているため、バーリング部材１の接合面１５を他の部材に接合する際、接合面１５と他の部材との間を良好にシールできる。
［他の実施形態］
（１）上記実施形態では、第１〜第５工程では、板材２が複数の金型により上下方向３に押圧される。しかしながら、板材が押圧される向きは、随時定められる。また、金型における板材２を押圧する各面の向き，形状等も、例えば、押圧の方向や、部材の形状等に応じて随時定められる。
(6) Since the sagging of the burring corner 29 is suppressed, when the joining surface 15 of the burring member 1 is joined to another member, a good seal can be provided between the joining surface 15 and the other member.
[Other Embodiments]
(1) In the above embodiment, in the first to fifth steps, the plate 2 is pressed in the vertical direction 3 by a plurality of dies. However, the direction in which the plate is pressed is determined as needed. In addition, the direction, shape, and the like of each surface of the mold that presses the plate material 2 are also determined as needed according to, for example, the direction of pressing, the shape of the member, and the like.
（２）上記実施形態では、第１〜第５工程によりバーリング部材１が成形されるが、一部の工程が省略されても良い。例えば、バーリング部１１が低い場合には、第１工程を省略し、屈曲部が成形されていない板材から第２屈曲部２４を成形しても良い。また、例えば、バーリング角部２９のダレが許容される度合いによっては、第３，第４工程のうちの一方を省略しても良い。 (2) In the above embodiment, the burring member 1 is formed by the first to fifth steps, but some steps may be omitted. For example, when the burring portion 11 is low, the first step may be omitted, and the second bent portion 24 may be formed from a plate material having no bent portion. Further, for example, depending on the degree to which sagging of the burring corner 29 is allowed, one of the third and fourth steps may be omitted.
（３）上記実施形態では、第１〜第５工程によりバーリング部１１が成形される。しかしながら、バーリング部材１に限らず、本体部と、本体部の縁から突出する屈曲部とを有する屈曲部材を板材から成形する際に、第１〜第５工程と同様の方法が用いられても良い。 (3) In the above embodiment, the burring portion 11 is formed by the first to fifth steps. However, not only the burring member 1 but also a method similar to the first to fifth steps may be used when molding a bent member having a main body and a bent portion protruding from an edge of the main body from a plate material. good.
（４）上記実施形態における１つの構成要素が有する複数の機能を、複数の構成要素によって実現したり、１つの構成要素が有する１つの機能を、複数の構成要素によって実現したりしてもよい。また、複数の構成要素が有する複数の機能を、１つの構成要素によって実現したり、複数の構成要素によって実現される１つの機能を、１つの構成要素によって実現したりしてもよい。また、上記実施形態の構成の一部を省略してもよい。また、上記実施形態の構成の少なくとも一部を、他の上記実施形態の構成に対して付加又は置換してもよい。 (4) A plurality of functions of one component in the above embodiment may be realized by a plurality of components, or one function of one component may be realized by a plurality of components. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment.
［特許請求の範囲との対応］
第２工程により成形された板材２が、対象板材の一例に相当する。また、上下方向３が押圧方向の一例に相当し、下側が突出側の一例に相当する。
[Correspondence with Claims]
The plate 2 formed in the second step corresponds to an example of the target plate. The vertical direction 3 corresponds to an example of the pressing direction, and the lower side corresponds to an example of the protruding side.
１…バーリング部材、１０…本体部、１１…バーリング部、１２…孔、１５…接合面、２…板材、２０…孔、２２…第１屈曲部、２３…本体部、２４…第２屈曲部、２４ａ…先端、２４ｂ…湾曲面、２６…第３屈曲部、２６ａ…先端、２７…第４屈曲部、３…上下方向、３４…第１内側金型、３４ｂ…第１内側主面、３４ｃ…傾斜面、３４ｄ…端面、３５…外側金型、３５ｂ…第１外側主面、３５ｃ…第２外側主面、３５ｄ…外側側面、３６…第２内側金型、３６ｂ…第２内側主面、３６ｃ…傾斜面、３６ｅ…逃し、３７…第３内側金型、３７ｂ…第３内側主面、３７ｃ…傾斜面。 DESCRIPTION OF SYMBOLS 1 ... Burring member, 10 ... Body part, 11 ... Burring part, 12 ... Hole, 15 ... Joint surface, 2 ... Plate material, 20 ... Hole, 22 ... First bent part, 23 ... Body part, 24 ... Second bent part , 24a: tip, 24b: curved surface, 26: third bent portion, 26a: tip, 27: fourth bent portion, 3: vertical direction, 34: first inner mold, 34b: first inner main surface, 34c ... inclined surface, 34d ... end surface, 35 ... outer mold, 35b ... first outer main surface, 35c ... second outer main surface, 35d ... outer side surface, 36 ... second inner mold, 36b ... second inner main surface , 36c: inclined surface, 36e: relief, 37: third inner mold, 37b: third inner main surface, 37c: inclined surface.
Claims (9)
板状の本体部と、前記本体部の縁から突出側に屈曲した屈曲部とを有する板材を、対象板材とし、
前記対象板材を、前記突出側に位置する内側金型と、外側金型とにより挟んで押圧方向に押圧することで、前記本体部の縁から前記屈曲部が前記突出側に突出した前記屈曲部材を成形し、
前記外側金型は、外側主面と、前記外側主面の縁から延びる外側側面とを有し、前記外側主面と前記外側側面との境界をなす部分を、金型角部とし、
前記対象板材を押圧する際、前記外側主面は前記本体部に当接し、前記外側側面は前記屈曲部に当接し、前記金型角部は前記屈曲部の外周側に位置し、
前記内側金型は、内側主面と、傾斜面とを有し、
前記対象板材を押圧する際、前記内側主面は前記本体部に当接し、前記傾斜面は、前記押圧方向に対し傾斜し、且つ、前記金型角部に向かい、さらに、前記屈曲部の内周側を押圧し、前記屈曲部に含まれる材料を前記金型角部に向けて移動させる
屈曲部材の製造方法。 A method for manufacturing a bending member,
A plate-shaped main body and a plate having a bent portion bent from the edge of the main body to the protruding side, as a target plate,
The bending member, in which the bent portion protrudes from the edge of the main body to the protruding side by sandwiching the target plate member between the inner mold located on the protruding side and the outer mold and pressing in the pressing direction. Molded,
The outer mold has an outer main surface and an outer side surface extending from an edge of the outer main surface, and a portion forming a boundary between the outer main surface and the outer side surface is a mold corner portion,
When pressing the target plate material, the outer main surface is in contact with the main body, the outer side surface is in contact with the bent portion, the die corner is located on the outer peripheral side of the bent portion,
The inner mold has an inner main surface and an inclined surface,
When pressing the target plate material, the inner main surface abuts on the main body, the inclined surface is inclined with respect to the pressing direction, and faces the mold corner, and further, the inside of the bent portion A method for manufacturing a bent member, which presses a circumferential side to move a material included in the bent portion toward the mold corner.
板材を屈曲させることで、前記対象板材を成形し、
前記対象板材を、前記内側金型と前記外側金型とにより挟んで押圧する
屈曲部材の製造方法。 The method for manufacturing a bent member according to claim 1,
By bending the plate, the target plate is formed,
A method for manufacturing a bending member, wherein the target plate material is sandwiched and pressed between the inner mold and the outer mold.
前記対象板材の前記屈曲部の内周側には、湾曲面が設けられており、前記対象板材を押圧する際、前記傾斜面は前記湾曲面を押圧する
屈曲部材の製造方法。 In the method for manufacturing a bent member according to claim 1 or 2,
A method of manufacturing a bending member, wherein a curved surface is provided on an inner peripheral side of the bent portion of the target plate material, and the inclined surface presses the curved surface when pressing the target plate material.
前記内側金型として、第１内側金型と第２内側金型とが用いられ、
前記外側金型と前記第１内側金型とにより前記対象板材を押圧した後、前記外側金型と前記第２内側金型とにより前記対象板材を押圧し、
前記第１内側金型の前記傾斜面は、前記第２内側金型の前記傾斜面よりも、前記押圧方向に対し傾斜している
屈曲部材の製造方法。 The method for manufacturing a bent member according to any one of claims 1 to 3,
As the inner mold, a first inner mold and a second inner mold are used,
After pressing the target plate by the outer die and the first inner die, pressing the target plate by the outer die and the second inner die,
The method for manufacturing a bending member, wherein the inclined surface of the first inner mold is inclined with respect to the pressing direction than the inclined surface of the second inner mold.
前記第１内側金型は、さらに端面を有し、
前記対象板材を押圧する際、前記端面は、前記屈曲部の先端に当接し、
前記対象板材を押圧する際、前記第２内側金型は、前記傾斜面の前記突出側に、前記屈曲部の先端が金型に当接しないようにするための空間を、前記外側金型との間に成形する
屈曲部材の製造方法。 The method for manufacturing a bending member according to claim 4,
The first inner mold further has an end face,
When pressing the target plate material, the end surface abuts the tip of the bent portion,
When pressing the target plate material, the second inner mold, on the protruding side of the inclined surface, a space for preventing the tip of the bent portion from contacting the mold, the outer mold. A method for manufacturing a bent member to be formed during.
前記内側金型として、第１内側金型と第２内側金型とが用いられ、
前記外側金型と前記第１内側金型とにより前記対象板材を押圧した後、前記外側金型と前記第２内側金型とにより前記対象板材を押圧し、
前記第１内側金型は、さらに端面を有し、
前記対象板材を押圧する際、前記端面は、前記屈曲部の先端に当接し、
前記対象板材を押圧する際、前記第２内側金型は、前記傾斜面の前記突出側に、前記屈曲部の先端が金型に当接しないようにするための空間を、前記外側金型との間に成形する
屈曲部材の製造方法。 The method for manufacturing a bent member according to any one of claims 1 to 3,
As the inner mold, a first inner mold and a second inner mold are used,
After pressing the target plate by the outer die and the first inner die, pressing the target plate by the outer die and the second inner die,
The first inner mold further has an end face,
When pressing the target plate material, the end surface abuts the tip of the bent portion,
When pressing the target plate material, the second inner mold, on the protruding side of the inclined surface, a space for preventing the tip of the bent portion from contacting the mold, the outer mold. A method for manufacturing a bent member to be formed during.
前記屈曲部とは、前記屈曲部材を貫通する孔を囲むバーリング状の部位である
屈曲部材の製造方法。 The method for manufacturing a bent member according to any one of claims 1 to 6,
The bent portion is a burring-shaped portion surrounding a hole passing through the bent member.
前記屈曲部材は、前記孔の周囲に位置する面であって、前記屈曲部が突出する側の反対側に位置する面である接合面は、他の部材に接合するよう構成されている
屈曲部材の製造方法。 The method for manufacturing a bent member according to claim 7,
The bending member is a surface located around the hole, and a joining surface that is a surface located on a side opposite to a side on which the bent portion protrudes is configured to be joined to another member. Manufacturing method.
前記対象板材は、ステンレスにより構成される
屈曲部材の製造方法。 The method for manufacturing a bent member according to any one of claims 1 to 8,
A method for manufacturing a bent member, wherein the target plate member is made of stainless steel.
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Also Published As
| Publication number | Publication date |
|---|---|
| DE102019113211A1 (en) | 2019-12-19 |
| JP6748149B2 (en) | 2020-08-26 |
| CN110586721B (en) | 2020-12-29 |
| CN110586721A (en) | 2019-12-20 |
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