WO2010101295A1 - 金属板の加工装置及び加工方法 - Google Patents
金属板の加工装置及び加工方法 Download PDFInfo
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- WO2010101295A1 WO2010101295A1 PCT/JP2010/053935 JP2010053935W WO2010101295A1 WO 2010101295 A1 WO2010101295 A1 WO 2010101295A1 JP 2010053935 W JP2010053935 W JP 2010053935W WO 2010101295 A1 WO2010101295 A1 WO 2010101295A1
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- WIPO (PCT)
- Prior art keywords
- metal plate
- roll
- rolls
- mold
- processing apparatus
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
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- 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
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
- B21D5/083—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers for obtaining profiles with changing cross-sectional configuration
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- 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
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
Definitions
- the present invention relates to a processing apparatus for forming a metal plate and a processing method using the processing apparatus.
- a high-strength metal plate is used in order to achieve weight reduction while ensuring rigidity.
- Such metal plates are conventionally formed by, for example, press forming or roll forming, but it is difficult to form the metal plate into a complicated shape due to a decrease in formability accompanying an increase in strength of the metal plate. It is becoming.
- the metal plate when roll forming is used, can be formed into a single simple cross-sectional shape in the longitudinal direction, but it is not possible to form a complicated shape whose cross-section changes in the longitudinal direction of the metal plate. Have difficulty.
- Patent Document 1 a press working apparatus for forming a gear-shaped portion of an outer peripheral surface such as a spline by roll forming, a die having a metal plate to be processed attached to the outer peripheral surface, and a die, It has a concentric die ring and a plurality of forming rolls arranged radially on the inner periphery of the die ring and rotating while being sandwiched between the metal plate and the inner peripheral surface of the die ring. Then, the metal plate is formed by moving the die ring relative to the mold and rotating a plurality of forming rolls.
- Patent Document 2 discloses a roll processing apparatus that performs molding processing corresponding to the curved shape of a sash-like long object.
- the molding roll moves on a linear cam that matches the shape of the long object.
- a roll forming method is disclosed in which a workpiece is processed into a shape curved in the longitudinal direction by raising and lowering the forming roll so as to follow the shape of the cam.
- Patent Document 3 when metal plates that intersect at a right angle are bonded (seaming), a forming roll having a right-angle cross section is formed at a right angle of the metal plate when the metal plates of the binding portion are overlapped and bent (hemming).
- a roll forming method is disclosed in which a binding portion is formed by applying to a binding portion and pressing while rotating.
- the metal plate can be formed into a gear shape (wave shape), but the cross-section in the longitudinal direction has the same shape. That is, the metal plate cannot be formed into a complicated shape whose cross section changes in the longitudinal direction. Further, the metal plate cannot be formed so that the height thereof changes in the longitudinal direction. Therefore, the metal plate could not be formed into a three-dimensionally complicated shape.
- Patent Document 2 The technique described in Patent Document 2 can also be applied to the case where the workpiece has the same cross-section in the longitudinal direction and is curved in one direction perpendicular to the longitudinal direction, but the cross-section changes in the longitudinal direction.
- the metal plate cannot be formed into such a complicated shape.
- the present invention has a problem that the conventional roll forming technology has a processing limit and cannot be formed to form a complicated cross section or a complicated shape that changes the cross section, and an efficient processing method of a high strength metal plate It was made in view of the request of That is, the problem to be solved by the present invention is to provide an efficient and general-purpose forming technique when forming a high-strength metal plate into a three-dimensionally complicated shape.
- the width of the hat portion changes, the width of the flange portion changes, or the extension flange portion and the contraction flange portion coexist.
- Including processing Of course, it is a three-dimensional complicated shape, and in a simple press molding, a compression part and a tension part are mixed, and it includes a molding process in which it is difficult to obtain a desired shape as a final product.
- the present inventors have intensively studied and, as a result, combined a press process for efficiently processing a high-strength metal plate with a roll forming method suitable for complex shape processing, and presses the roll into the press die.
- the present inventors have found that even a high-strength metal plate can be optimally formed into an arbitrary shape, thereby achieving the present invention.
- the present invention is a processing apparatus for forming a metal plate, and the metal plate is sandwiched between a mold (also referred to as a punch) having a shape that matches the shape of the metal plate after forming and the mold.
- a roll angle setting mechanism that can be changed.
- each roll can move independently along the ridge line of the mold in the horizontal direction, so even if the cross section of the metal plate after forming changes in the longitudinal direction, the cross section changes.
- Each roll can be moved following.
- each roll can be raised and lowered independently in the vertical direction, even when the height of the metal plate after forming changes, each roll is raised and lowered following the change in the height,
- the metal plate can be sandwiched with a predetermined load between the corresponding processed surfaces of the mold.
- each roll can be independently moved three-dimensionally, the metal plate can be formed into a three-dimensionally complicated shape.
- each of the rolls may have a load detection device.
- the molding load can be controlled by controlling the machining load during the molding process.
- the mold may be molded while moving up and down.
- the three-dimensional complex shape includes a component shape whose width changes arbitrarily.
- the roll may have a main body roll section and a projecting roll section that protrudes concentrically from the main body roll section and has a smaller diameter than the main body roll section.
- a corner part means the corner part formed by the surface of a main body roll part, and the outer peripheral surface of a protrusion roll part.
- the plurality of rolls may include the rolls provided with the protruding roll portions having different diameters.
- the bottom surface shape of the mold may be a shape in which the inside protrudes compared to the outside, and the protruding roll portion may protrude inward with respect to the main body roll portion.
- die is a shape where the outer side protruded compared with the inner side, and the said protrusion roll part may protrude outside with respect to the said main body roll part.
- Another aspect of the present invention is a processing method for forming a metal plate using a mold and a plurality of rolls, each of the rolls independently rising in the vertical direction, the roll and the lower surface of the mold, The mold metal plate is formed while the metal plate is sandwiched between them with a predetermined load.
- each said roll may move independently along the ridgeline of the said metal mold
- each roll can move in the horizontal direction in addition to the vertical movement, and may be molded while sandwiching the metal plate with a predetermined load at an arbitrary position.
- the rolls may be formed by arbitrarily setting an angle to be pressed against the mold by a roll angle setting mechanism.
- the plurality of rolls may reciprocate a plurality of times in the horizontal direction along the ridgeline on the lower surface of the mold to form a metal plate.
- the roll protrudes from the main body roll portion, the main body roll portion, has a smaller diameter than the main body roll portion, and the outer peripheral surface of the corner portion of the main body roll portion and the protruding roll portion over the entire circumference.
- the metal plate may be formed using the plurality of rolls that are provided and are curved inwardly in a side view and have different curvature radii.
- a metal plate may be formed using the plurality of rolls having different diameters of the protruding roll portions.
- the metal plate after forming may have an extended flange portion and a contracted flange portion.
- the pair of rolls may move in a direction approaching each other around the stretch flange portion, and the stretch flange portion may be molded.
- the contracted flange portion where the compression force acts on the metal plate after forming, the pair of rolls may move in a direction away from each other about the contracted flange portion, and the contracted flange portion may be formed.
- the metal plate may be high-tensile steel having a tensile strength of 780 MPa or more. Further, it may be an ultra high strength steel having a tensile strength of 980 MPa or more or an ultra high strength steel having a tensile strength of 1470 MPa or more.
- a high-strength metal plate can be efficiently formed into a three-dimensional complex shape.
- FIG. 1 is a side view illustrating the outline of the configuration of the processing apparatus according to the present embodiment.
- FIG. 2 is a side view schematically showing the configuration of the processing apparatus according to the present embodiment.
- FIG. 3 is a plan view schematically showing a mold of the processing apparatus according to the present embodiment.
- FIG. 4 is a plan view schematically showing the configuration of the processing apparatus according to the present embodiment.
- FIG. 5 is a plan view of the metal plate after forming.
- FIG. 6 is a side view of the metal plate after forming.
- FIG. 7 is a side view of the metal plate after forming.
- FIG. 8 is a side view of the roll.
- FIG. 9 is an explanatory view showing a state in which a metal plate is formed by the processing apparatus.
- FIG. 9 is an explanatory view showing a state in which a metal plate is formed by the processing apparatus.
- FIG. 10 is an explanatory view showing a state in which a metal plate is formed by the processing apparatus.
- FIG. 11 is an explanatory view showing a state in which a metal plate is formed by the processing apparatus.
- FIG. 12 is a side view of a roll according to another embodiment, in which (a) shows a roll having a curved portion with a radius of curvature R1, and (b) shows a roll having a curved portion with a radius of curvature R2.
- C shows the roll which has a curved part whose curvature radius is R3, and (d) shows the roll which does not have a curved part.
- FIG. 13 is a side view illustrating the outline of the configuration of a processing apparatus according to another embodiment.
- FIG. 14 is a diagram of a metal plate formed into a complex shape.
- (A) is an overhead view
- (b) is a plan view
- (c) is a side view.
- FIG.1 and FIG.2 is a side view which shows the outline of a structure of the processing apparatus 1 which shape
- FIG. 3 is a plan view schematically showing the configuration of the processing apparatus 1.
- the processing apparatus 1 is used to shape the metal plate H so that the inside protrudes convexly as shown in FIGS.
- the metal plate H meanders in plan view as shown in FIG.
- the metal plate H after forming changes in height along the longitudinal direction of the metal plate H (X direction in FIG. 6).
- the protrusion H1 of the metal plate H after forming has a substantially square shape as shown in FIG.
- This protrusion H1 is continuously formed along the longitudinal direction of the metal plate H, and its size is changed. That is, the height D (the Z direction in FIG. 7) and the width W (the Y direction in FIG. 7) of the protrusion H ⁇ b> 1 change in the longitudinal direction of the metal plate H.
- the processing apparatus 1 has a mold 10 (also referred to as a punch) as shown in FIG.
- the mold 10 has a lower surface shape that matches the shape of the steel plate H after forming. That is, the mold 10 meanders in plan view as shown in FIG. Further, as shown in FIG. 1, the lower surface of the mold 10 changes its height along the longitudinal direction of the mold 10 (the X direction in FIG. 1). Further, as shown in FIGS. 2 and 3, a protruding portion 11 that protrudes as compared with the outer side is formed along the longitudinal direction (X direction in FIG. 3) of the mold 10 inside the lower surface of the mold 10. Yes.
- the rails 20 and 21 are disposed along the ridgelines L1 and L2 of the protruding portion 11 of the mold 10 shown in FIG.
- a plurality of, for example, four types of rolls 30 to 33 are arranged on the rail 20.
- rolls 30 to 33 are arranged on the rail 21. That is, the processing apparatus 1 is provided with a total of eight rolls 30 to 33.
- Each of the rolls 30 to 33 is provided with a roll moving mechanism 40 that supports the rolls 30 to 33 and can move independently on the rails 21 and 21 in the horizontal direction. The roll moving mechanism 40 can raise and lower the rolls 30 to 33 independently in the vertical direction as will be described later.
- the roll 30 has a main body roll portion 30a and a protruding roll portion 30b that protrudes concentrically from the main body roll portion 30a and has a smaller diameter than the main body roll portion 30a.
- This roll 30 is arrange
- the roll 30 has a main body roll portion 30 a disposed outside the projecting portion 11 and a projecting roll portion 30 b disposed below the projecting portion 11 so as to match the shape of the projecting portion 11. That is, the roll 30 is arranged on the rails 20 and 21 so that the protruding roll portion 30b protrudes inward.
- the rolls 31 to 33 also have main body roll portions 31a to 33a and protruding roll portions 31b to 33b having the same configuration, and are similarly arranged on the rails 20 and 21.
- the roll moving mechanism 40 has a shaft 41 that penetrates and supports the center of the roll 30 as shown in FIGS. 1 and 2.
- the shaft 41 is supported by the cylinder 43 via the support member 42.
- a hydraulic cylinder is used as the cylinder 43, and the roll 30 can be moved up and down by the cylinder 43. And by raising / lowering the roll 30, the metal plate H can be inserted
- the cylinder 43 and the drive mechanism 44 of the roll moving mechanism 40 are controlled by the control unit 50 as shown in FIGS.
- the control unit 50 controls the cylinder 43 to control the vertical load when the metal plate H is sandwiched between the rolls 30 to 33 and the mold 10 to a predetermined load.
- the vertical load can be measured in terms of an input to the cylinder 43 (for example, an oil amount in the case of a hydraulic cylinder).
- a load measuring device (not shown) may be installed between the cylinder 43 and the drive mechanism 44 to thereby measure the load.
- control unit 50 controls the drive mechanism 44 to control the movement of the rolls 30 to 33 in the horizontal direction, for example, the moving direction, the moving speed, the number of reciprocating movements, and the like.
- the predetermined load at the time of sandwiching the metal plate H and the horizontal movement of the rolls 30 to 33 are set by the material, thickness, or shape after forming of the metal plate H.
- the metal plate H may be formed by a single movement without reciprocating the rolls 30 to 33 in the horizontal direction.
- each roll moves independently by moving the drive mechanism on the rails 20 and 21 .
- the drive mechanism 44 which can move to the arbitrary positions on a horizontal surface plate (not shown), it can be moved to an arbitrary position independently for each roll. Since each roll can be moved vertically up and down via the cylinder 43 and the support member 42 as a result, each roll can be independently arranged at an arbitrary position in the three-dimensional space.
- the moving mechanism is not limited to the present embodiment, and the moving mechanism is within the technical scope of the present invention as long as each roll can be arranged in the three-dimensional space.
- the shaft 41 which supports each roll 30 in FIG. 2 is centering on a Z-axis (in some cases also a Y-axis).
- a mechanism (not shown) that rotates around the X axis (perpendicular to the paper surface) may also be provided. With these rotation mechanisms, the angle at which the roll 30 is pressed against the mold 10 can be arbitrarily set.
- These rotation mechanisms are collectively referred to as a roll angle setting mechanism in the present invention.
- the processing load is applied as a reaction force to the support member of the drive mechanism 40 such as the rails 20 and 21 or a horizontal surface plate (not shown). Since the support member has a simple shape, it can be easily stiff enough to withstand the processing reaction force. By designing the overall device rigidity according to the metal material to be processed, a large processing load can be obtained. It is possible to easily design a device that can handle high-strength steel, ultra-high-strength steel, and ultra-high-strength steel.
- the mold 10 is lowered and the rolls 30 to 33 are raised independently, and the metal plate H is sandwiched between the lower surface of the mold 10 and the rolls 30 to 33.
- the rolls 30 to 33 are independently reciprocated on the rails 20 and 21 while sandwiching the metal plate H.
- the cylinder 43 is controlled by the control unit 50 so that the vertical load applied to the metal plate H is always a predetermined load.
- the drive mechanism 44 is controlled by the control unit 50 so that the moving direction, moving speed, number of reciprocations, and the like of the rolls 30 to 33 have predetermined values.
- the metal plate H is formed into a predetermined shape.
- each of the rolls 30 to 33 can be independently moved in the horizontal direction along the ridgelines L1 and L2 on the lower surface of the mold 10 by the drive mechanism 44. Even if the cross section of H changes, the rolls 30 to 33 can be moved following the change of the cross section. Moreover, since each roll 30-33 can be raised / lowered independently by the cylinder 43 in the vertical direction, even if the height of the metal plate H after forming changes, each roll follows the change in the height.
- the metal plates can be sandwiched between the roll and the lower surface of the mold with a predetermined load by raising and lowering 30-33. Since the rolls 30 to 33 can be independently moved three-dimensionally in this way, the metal plate H can be formed into a predetermined shape that is three-dimensionally complex.
- the metal plate H can always be sandwiched between the lower surface of the mold 10 and the rolls 30 to 33 with a predetermined load. For this reason, the metal plate H can be accurately formed into a predetermined shape.
- the metal plate H is formed as shown in FIG. 5, for example, the metal plate H is cracked in a portion A (hereinafter referred to as “elongation flange portion A”) where a tensile force acts on the formed metal plate H. May occur. Therefore, when the metal plate H is formed using the processing apparatus 1, the pair of adjacent rolls 30 and 31 are moved in a direction approaching each other with the stretch flange portion A as a center as shown in FIG. Part A may be molded. In this case, since the tensile force is relaxed in the stretch flange portion A by the rolls 30 and 31, it is possible to prevent the metal plate H from being cracked in the stretch flange portion A after forming.
- shrink flange portion B a portion B where a compressive force acts on the formed metal plate H. May occur. Therefore, when the metal plate H is formed using the processing apparatus 1, the pair of adjacent rolls 30 and 31 are moved in a direction away from each other about the flange portion B as shown in FIG. Part B may be molded. In this case, since the compressive force is relieved on the contracted flange portion B by the rolls 30, 31, it is possible to prevent the metal plate H from being wrinkled in the contracted flange portion B after forming.
- the rolls 30 to 33 have the same shape, but the rolls 30 to 33 may have different shapes as shown in FIGS.
- the roll 30 is formed by the corner portions of the main body roll portion 30a and the protruding roll portion 30b, that is, the surface of the main body roll portion 30a and the outer peripheral surface of the protruding roll portion 30b.
- a curved portion 30c that is curved inwardly in a side view is provided over the entire circumference.
- the curved portion 30c has a curvature radius R1. 12B and 12C, curved portions 31c and 32c are similarly formed in the rolls 31 and 32, respectively.
- Each curved portion 31c, 32c has a radius of curvature R2, R3, respectively.
- the curvature radii R1 to R3 of the curved portions 30c to 32c are different curvature radii, and R1> R2> R3.
- the roll 33 is not formed with the curved portion described above.
- the metal plate H is shape
- the diameters of the protruding roll portions 30b to 33b of the rolls 30 to 33 may be reduced in order.
- the mold 10 in which the protruding portion 11 is formed on the inner side of the lower surface is used.
- the protrusions 61 of the mold 60 are formed on both outer sides of the lower surface of the mold 60.
- the rails 20 and 21 are disposed along the ridgelines L3 and L4 of the protruding portion 61.
- the main body roll portion 30 a is disposed inside the projecting portion 61 and the projecting roll portion 30 b is disposed below the projecting portion 61 so as to match the shape of the projecting portion 61. That is, the roll 30 is arrange
- the rolls 31 to 33 are similarly arranged on the rails 20 and 21.
- a hydraulic cylinder is used as the cylinder 43, but the present invention is not limited to this as long as the vertical movement of the rolls 30 to 33 can be controlled.
- the cylinder 43 can be an electric cylinder, a pneumatic cylinder, or the like.
- a spring can be used for the cylinder 43.
- a motor (not shown) or the like is built in the drive mechanism 44.
- a motor is provided outside the drive mechanism 44, and the rolls 30 to 33 are moved in the horizontal direction.
- the drive mechanisms 44 of the rolls 30 to 33 may be connected by, for example, a wire, and the rolls 30 to 33 may be moved in the horizontal direction by the drive mechanism 44.
- the processing apparatus 1 previously shown in FIGS. 1 to 4 was used as the processing apparatus for the metal plate.
- a 2000 kN press was used as a conventional processing apparatus.
- test material No. Although the formability of the steel plate No. 1 was good, the test material No. In the steel plate No. 2, wrinkles were generated in the contracted flange portion (contracted flange portion B in FIG. 5). In addition, test material No. In the steel plates 3 and 4, wrinkles were generated in the contracted flange portion (contracted flange portion B in FIG. 5), and cracks were generated in the stretch flange portion (extended flange portion A in FIG. 5).
- test material No. in Table 1 The cross-sectional shape of the steel plates 3 and 4 as shown in FIG. 14 is a substantially rectangular groove shape as in FIG. 7, and 100 mm in the horizontal direction and perpendicular to the longitudinal direction of the metal plate as in FIGS.
- the shape was curved to 75 mm in the direction and further changed to a shape in which the peak height (D in FIG. 7) changed from 30 mm at one end to 40 mm at the other end with respect to the longitudinal direction of the metal plate. Even in the processing of such a complicated shape, there was no occurrence of wrinkles or cracks.
- the present invention is useful when forming a metal plate into a three-dimensionally complicated shape.
Abstract
Description
即ち、本発明は、金属板を成形する加工装置であって、成形後の金属板の形状と適合する形状を有する金型(パンチともいう)と、前記金型との間で金属板を挟み込んで当該金属板を成形する複数のロールと、前記各ロールを、水平方向に独立して移動させ、かつ鉛直方向に独立して昇降させるロール移動機構と、前記金型へのロールの押し付け角度を変えられるロール角度設定機構とを有することを特徴としている。
さらに、前記ロールは、それぞれに荷重検出装置を有することができる。その荷重検出装置によって、成形加工時の加工荷重を制御して成形加工することもできる。
加えて、金型も上下動しながら成形加工してもよい。
なお、三次元的な複雑形状とは、幅が任意に変化するような部品形状も含む。
また、前記各ロールが前記金型の稜線に沿って独立して移動してもよい。
さらに、前記各ロールが、鉛直方向の昇降に加え、水平方向の移動もでき、任意の位置で金属板を所定の荷重で挟み込みながら成形加工してもよい。
その際、前記各ロールが、ロール角度設定機構により、金型に押し付ける角度を任意に設定し、成形加工してもよい。
その際、成形後の金属板に引張力が作用する伸びフランジ部において、一対の前記ロールが前記伸びフランジ部を中心として互いに近づく方向に移動して、当該伸びフランジ部を成形してもよい。また、成形後の金属板に圧縮力が作用する縮みフランジ部において、一対の前記ロールが前記縮みフランジ部を中心として互いに離れる方向に移動して、当該縮みフランジ部を成形してもよい。
もちろん、金属板が780MPa以上の引張強度を有する高張力鋼でもよい。さらに引張強度980MPa以上の超高張力鋼でも、1470MPa以上の超超高張力鋼でもよい。
図2は、本実施の形態にかかる加工装置の構成の概略を示す側面図である。
図3は、本実施の形態にかかる加工装置の金型の概略を示す平面図である。
図4は、本実施の形態にかかる加工装置の構成の概略を示す平面図である。
図5は、成形後の金属板の平面図である。
図6は、成形後の金属板の側面図である。
図7は、成形後の金属板の側面図である。
図8は、ロールの側面図である。
図9は、加工装置で金属板を成形する様子を示した説明図である。
図10は、加工装置で金属板を成形する様子を示した説明図である。
図11は、加工装置で金属板を成形する様子を示した説明図である。
図12は、他の実施の形態にかかるロールの側面図であって、(a)は曲率半径がR1の湾曲部を有するロールを示し、(b)は曲率半径がR2の湾曲部を有するロールを示し、(c)は曲率半径がR3の湾曲部を有するロールを示し、(d)は湾曲部を有さないロールを示している。
図13は、他の実施の形態にかかる加工装置の構成の概略を示す側面図である。
図14は、複雑形状に成形した金属板の図である。(a)は俯瞰図を、(b)は平面図を、(c)は側面図を示す。
例えば、水平定板(図示せず)上の任意の位置へ移動可能な駆動機構44であれば、各ロール毎に独立して、任意の位置へ移動させることができる。これにシリンダ43、支持部材42を介して、各ロールが鉛直上下動できるため、結果として三次元空間の任意の位置に各ロールを独立して配置することも可能である。このように、移動機構については、本形態に限定されることなく、三次元空間に各ロールを配置できるものであれば、本発明の技術範囲に入るものである。
金型60の突出部61は、当該金型60の下面の両外側に形成されている。かかる場合、レール20、21は、突出部61の稜線L3、L4に沿って配設されている。また、ロール30は、突出部61の形状と適合するように本体ロール部30aが突出部61の内側に配置され、突出ロール部30bが突出部61の下方に配置されている。すなわち、ロール30は、レール20、21上に、突出ロール部30bが外側に突出するように配置されている。なお、ロール31~33についても、レール20、21上に同様に配置されている。
10 金型
11 突出部
20、21 レール
30~33 ロール
30a~33a 本体ロール部
30b~33b 突出ロール部
30c~33c 湾曲部
40 ロール移動機構
41 シャフト
42 支持部材
43 シリンダ
44 駆動機構
50 制御部
60 金型
61 突出部
A 伸びフランジ部
B 縮みフランジ部
H 金属板
H1 突出部
L1~L4 稜線
R1~R3 曲率半径
Claims (18)
- 金属板を成形する加工装置であって、
成形後の金属板の形状と適合する面形状を有する金型と、
前記金型との間で金属板を挟み込んで当該金属板を成形する複数のロールと、
前記ロールを、独立して水平方向に移動させ、かつ鉛直方向に独立して昇降させるロール移動機構と、を有することを特徴とする、金属板の加工装置。 - 前記移動機構が、ロールを前記金型に押し付ける角度を任意に設定することができるロール角度設定機構を有していることを特徴とする請求項1に記載の金属板の加工装置。
- 前記移動機構が、前記金型の稜線に沿って独立し移動することを特徴とする請求項1または2に記載の金属板の加工装置。
- 前記移動機構が加工荷重検出装置を備えていることを特徴とする請求項1~3のいずれか1項に記載の金属板の加工装置。
- 前記ロールは、本体ロール部と、前記本体ロール部から同心状に突出し、当該本体ロール部より小さい径の突出ロール部と、を有することを特徴とする、請求項1~4のいずれか1項に記載の金属板の加工装置。
- 前記本体ロール部と前記突出ロール部とのコーナー部の外周面には、全面に亘って、側面視において内側に凸に湾曲した湾曲部が設けられ、前記複数のロールは、異なる曲率半径の前記湾曲部を備えた前記ロールを有することを特徴とする、請求項5に記載の金属板の加工装置。
- 前記複数のロールは、異なる径の前記突出ロール部を備えた前記ロールを有することを特徴とする、請求項5又は6に記載の金属板の加工装置。
- 前記金型の面形状は、内側が外側に比べて突出した形状であり、前記突出ロール部は、前記本体ロール部に対して内側に突出していることを特徴とする、請求項5~7のいずれかに記載の金属板の加工装置。
- 前記金型の面形状は、外側が内側に比べて突出した形状であり、前記突出ロール部は、前記本体ロール部に対して外側に突出していることを特徴とする、請求項5~7のいずれかに記載の金属板の加工装置。
- 金型及び複数のロールを用いて金属板を成形する加工方法であって、
前記各ロールが独立して鉛直方向に上昇し、当該ロールと前記金型との間で金属板を所定の荷重で挟み込みながら、前記各ロールが水平方向に独立して移動して、当該金属板を成形することを特徴とする、金属板の加工方法。 - 前記ロールが前記金型の稜線に沿って、独立して水平方向に移動することを特徴とする請求項10に記載の金属板の加工方法。
- 前記複数のロールは、前記金型の稜線に沿って水平方向に往復移動して、金属板を成形することを特徴とする、請求項10または11に記載の金属板の加工方法。
- 前記ロールは、本体ロール部と、前記本体ロール部から突出し、前記本体ロール部より小さい径の突出ロール部と、前記本体ロール部と前記突出ロール部とのコーナー部の外周面に全周に亘って設けられ、側面視において内側に凸に湾曲した湾曲部と、を有し、前記湾曲部の曲率半径が異なる前記複数のロールを用いて金属板を成形することを特徴とする、請求項10又は12に記載の金属板の加工方法。
- 前記突出ロール部の径が異なる前記複数のロールを用いて金属板を成形することを特徴とする、請求項10~13のいずれかに記載の金属板の加工方法。
- 成形後の金属板が、引張力が作用する伸びフランジ部若しくは圧縮力が作用する縮みフランジ部の一方または両方を有することを特徴とする請求項10~14に記載の金属板の加工方法。
- 成形後の金属板に引張力が作用する伸びフランジ部において、一対の前記ロールが前記伸びフランジ部を中心として互いに近づく方向に移動して、当該伸びフランジ部を成形することを特徴とする、請求項15に記載の金属板の加工方法。
- 成形後の金属板に圧縮力が作用する縮みフランジ部において、一対の前記ロールが前記縮みフランジ部を中心として互いに離れる方向に移動して、当該縮みフランジ部を成形することを特徴とする、請求項15に記載の金属板の加工方法。
- 前記金属板が引張強度780MPa以上の高張力鋼板であることを特徴とする請求項10~17のいずれか1項に記載の金属板の加工方法。
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