WO2016067537A1 - Spin-molding method - Google Patents
Spin-molding method Download PDFInfo
- Publication number
- WO2016067537A1 WO2016067537A1 PCT/JP2015/005181 JP2015005181W WO2016067537A1 WO 2016067537 A1 WO2016067537 A1 WO 2016067537A1 JP 2015005181 W JP2015005181 W JP 2015005181W WO 2016067537 A1 WO2016067537 A1 WO 2016067537A1
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- WIPO (PCT)
- Prior art keywords
- plate material
- processing tool
- molding method
- forming roller
- spinning
- Prior art date
Links
- 238000000465 moulding Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 94
- 238000003825 pressing Methods 0.000 claims abstract description 9
- 238000009987 spinning Methods 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
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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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- 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
- B21D22/14—Spinning
- B21D22/18—Spinning using tools guided to produce the required profile
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
Definitions
- the present invention relates to a spinning molding method for processing a plate material.
- a spinning molding method in which a region to be molded of a plate material is formed into a tapered shape using a processing tool while rotating the plate material (see, for example, Patent Document 1).
- the processing tool is pressed against the plate material at a constant axial feed speed (moving speed of the processing tool in the direction along the rotation axis of the plate material), while the plate material is formed from the inner end to the outer side.
- a constant axial feed speed moving speed of the processing tool in the direction along the rotation axis of the plate material
- the plate material is formed from the inner end to the outer side.
- the processing tool reaches the outer end of the molding target area, it is moved toward the end at a constant radial traveling speed (moving speed of the processing tool in a direction perpendicularly away from the rotation axis of the plate). Pulled away from the plate.
- a recess (press mark of the processing tool) that matches the shape of the processing tool is formed at a position where the processing tool is separated from the plate material.
- an object of the present invention is to provide a spinning molding method capable of preventing the press marks of the processing tool from being formed.
- a spinning molding method is a spinning molding method in which a molding target region of the plate material is molded into a tapered shape using a processing tool while rotating the plate material, The processing tool is moved from the inner end to the outer end of the region to be molded while being pressed against the plate material, and the plate material is rotated while the position of the processing tool is constrained at the outer end.
- the processing tool is made to wait at the outer end of the molding target region (that is, the molding end point), it is possible to prevent the press mark of the processing tool from being formed.
- the spinning molding method according to another aspect of the present invention is a spinning molding method for forming a molding target region of the plate material into a tapered shape using a processing tool while rotating the plate material, The sheet material is moved from the inner end toward the outer end while being pressed against the plate material, and the axial feeding speed and the radial traveling speed of the processing tool are reduced in the vicinity of the outer end. .
- the plate material is processed slowly in the vicinity of the outer end of the forming target region (that is, the forming end point), so that it is possible to prevent the press mark of the processing tool from being formed.
- the pressing of the processing tool to the plate material may be performed while locally heating a portion of the plate material located on the same circumference as the portion where the processing tool is pressed.
- plate material is pressed can be processed intensively. For this reason, operation of the processing tool for obtaining a desired shape becomes easy.
- the processing tool is a forming roller having a trapezoidal cross section whose diameter decreases in a direction away from the rotation axis of the plate material, and the large diameter portion of the forming roller makes point contact with the plate material when the forming roller is pressed against the plate material.
- the molding roller may be kept in a posture in which an angle formed between a side surface of the molding roller and a plane orthogonal to the rotation axis of the plate material is 1 degree or more and 30 degrees or less. According to this configuration, it is possible to restrict the warpage of the outer portion of the plate material from the portion where the processing tool is pressed by the side surface of the forming roller.
- the pressing of the processing tool to the plate material may be performed in a state where a portion of the plate material where the processing tool is pressed is floated. According to this configuration, it is not necessary to use a mold (mandrel) often used in the conventional spinning molding method, and the manufacturing cost can be reduced.
- FIG. 2A is a cross-sectional view of the plate material immediately before the start of spinning forming
- FIG. 2B is a cross-sectional view of the plate material at the end of spinning forming.
- FIG. 1 is an explanatory diagram of a spinning molding method according to an embodiment of the present invention.
- This spinning forming method is a method of forming the forming target region R (see FIG. 2A) of the plate 1 into a tapered shape using the processing tool 3 while rotating the plate 1.
- the plate material 1 is, for example, a flat circular plate.
- the shape of the plate 1 may be polygonal or elliptical.
- the plate 1 does not necessarily need to be flat over the entire surface.
- the thickness of the central portion may be thinner or thicker than the thickness of the peripheral portion, and the whole or a part thereof is processed into a tapered shape in advance. May be.
- plate material 1 is not specifically limited, For example, it is a titanium alloy.
- the plate material 1 is fixed to the rotating shaft 2. That is, the center line of the rotating shaft 2 is the rotating shaft 10 of the plate 1.
- the rotation axis 10 of the plate 1 may be parallel to the vertical direction, may be parallel to the horizontal direction, or may be directed obliquely.
- the rotating shaft 2 is rotated by a rotating mechanism (not shown).
- the rotary shaft 2 is not provided with a molding die (mandrel), and only the center portion of the plate 1 is supported by the rotary shaft 2 not only before the start of spinning molding but also during spinning molding. That is, the pressing of the processing tool 3 to be described later to the plate material 1 is performed in a state where the portion of the plate material 1 where the processing tool 3 is pressed is lifted.
- a molding die (mandrel) is provided on the rotating shaft 2, and a portion of the plate 1 to which the processing tool 3 is pressed may be supported by the molding die during spinning molding.
- the processing tool 3 is pressed by the plate member 1 toward the outer end (that is, the molding end point) Re from the inner end (that is, the molding start point) Rs of the molding target region R. Moved.
- the processing tool 3 is moved in a direction along the rotation axis 10 of the plate material 1 at a specific axial direction feeding speed according to the place, and is pressed by the plate material 1.
- the processing tool 3 is moved in the direction away from the rotating shaft 10 of the board
- a forming roller 30 that rotates following the rotation of the plate 1 is used as the processing tool 3.
- the processing tool 3 is not limited to the forming roller 30, and may be a spatula, for example.
- the forming roller 30 has a trapezoidal shape that is reduced in diameter toward the direction away from the rotary shaft 10 of the plate 1.
- the forming roller 30 has a large-diameter bottom surface on the rotating shaft 10 side, a small-diameter surface opposite to the rotating shaft 10, and a tapered side surface 31 connecting them. That is, the annular corner portion between the side surface 31 and the bottom surface is the large-diameter portion, and the annular corner portion between the side surface 31 and the top surface is the small-diameter portion.
- a forming roller having another cross-sectional shape for example, a cross-sectional rhombus shape or a long cross-sectional shape).
- the pressing of the forming roller 30 to the plate material 1 causes the large diameter portion of the forming roller 30 to make point contact with the plate material 1 and the forming roller.
- the forming roller 30 is maintained in a posture in which an angle ⁇ (see FIG. 2A) formed by the side surface 31 of the plate 30 and a plane orthogonal to the rotation axis 10 of the plate 1 (that is, a plane parallel to the plate 1) is 1 degree or more and 30 degrees or less. It is done in the state.
- the processing tool 3 is pressed against the plate material 1 while a portion of the plate material 1 located on the same circumference as the portion where the processing tool 3 is pressed is locally heated by the heater 4.
- “on the same circumference” means a portion where the processing tool 3 is pressed and a portion heated by the heater 4 within a ring-shaped range having a certain width around the rotation axis 10 of the plate 1. It means that there exists.
- the portion heated by the heater 4 may exist within a range of ⁇ 10% of the distance from the rotating shaft 10 of the plate 1 to the portion where the processing tool 3 is pressed.
- the heater 4 is disposed on the opposite side of the processing tool 3 with respect to the plate material 1 so that the heater 4 heats the plate material 1 from the back side.
- the heater 4 may be arrange
- the heater 4 is preferably a high-frequency induction heater having a coil portion to which a high-frequency AC voltage of 5 k to 400 kHz is applied.
- the coil portion extends along the plate material 1 extending in the rotation direction of the plate material 1 so that the local heating of the plate material 1 can be continuously performed in the rotation direction of the plate material 1. It is desirable to have a double arc shape. However, a gas burner may be used as the heater 4.
- FIG. 3 shows a pressing state of the processing tool 3 against the plate 1 immediately before the end of spinning molding.
- FIG. 3 shows a pressing state of the processing tool 3 against the plate 1 immediately before the end of spinning molding.
- the outer portion of the plate 1 than the portion where the processing tool 3 is pressed may warp toward the processing tool 3.
- the forming roller 30 having a trapezoidal cross section is used and the posture of the forming roller 30 is maintained as in the present embodiment, the warping of the outer portion of the plate material 1 can be restricted by the side surface 31 of the forming roller 30. it can.
- the processing tool 3 when the processing tool 3 reaches the outer end Re of the molding target region R, the processing tool 3 is put on standby, but in the vicinity of the outer end Re, the axial pushing speed and the radial direction of the processing tool 3 are set. You may reduce advancing speed.
- “in the vicinity of the outer end Re” is a range in which the upper limit is 1/5 of the molding target region R from the outer end Re to the inner side, and can be arbitrarily set.
- the processing tool 3 when the processing tool 3 reaches the end proximity point adjacent to the outer end Re of the molding target region R, the axial feed speed and the radial direction traveling speed of the processing tool 3 are less than half before reaching the end proximity point. It may be lowered.
- the pressing of the processing tool 3 to the plate material 1 may be performed in a state where the plate material 1 is entirely heated, or without heating the plate material 1 instead of locally heating the plate material 1.
- the portion in which the processing tool 3 is pressed in the plate material 1 is compared with the case where the plate material 1 is not heated or the plate material 1 is heated as a whole. Can be processed intensively. For this reason, operation of the processing tool 3 for obtaining a desired shape becomes easy.
Abstract
A spin-molding method whereby a region to be molded on a sheet material is formed into a tapered shape by using a processing tool while rotating the sheet material, wherein the processing tool is moved from the inside end of the region to be molded to the outside end of the region to be molded while pressing the processing tool against the sheet material, and at the outside end the sheet material is rotated in a state in which the position of the processing tool is restrained.
Description
本発明は、板材を加工するスピニング成形方法に関する。
The present invention relates to a spinning molding method for processing a plate material.
従来から、板材を回転させながら加工具を用いて板材の成形対象領域をテーパー状に成形するスピニング成形方法が知られている(例えば、特許文献1参照)。
Conventionally, a spinning molding method is known in which a region to be molded of a plate material is formed into a tapered shape using a processing tool while rotating the plate material (see, for example, Patent Document 1).
通常のスピニング成形方法では、加工具が一定の軸方向送込速度(板材の回転軸に沿う方向での加工具の移動速度)で板材に押圧されながら、板材の成形対象領域の内側端から外側端に向かって一定の径方向進行速度(板材の回転軸から垂直に離れる方向での加工具の移動速度)で移動させられ、加工具が成形対象領域の外側端に到達した直後に加工具が板材から引き離される。
In the normal spinning forming method, the processing tool is pressed against the plate material at a constant axial feed speed (moving speed of the processing tool in the direction along the rotation axis of the plate material), while the plate material is formed from the inner end to the outer side. Immediately after the processing tool reaches the outer end of the molding target area, it is moved toward the end at a constant radial traveling speed (moving speed of the processing tool in a direction perpendicularly away from the rotation axis of the plate). Pulled away from the plate.
しかしながら、そのような方法では、板材における加工具を引き離した位置に、加工具の形状に合う窪み(加工具の押圧跡)が形成される。
However, in such a method, a recess (press mark of the processing tool) that matches the shape of the processing tool is formed at a position where the processing tool is separated from the plate material.
そこで、本発明は、加工具の押圧跡が形成されることを防止できるスピニング成形方法を提供することを目的とする。
Therefore, an object of the present invention is to provide a spinning molding method capable of preventing the press marks of the processing tool from being formed.
前記課題を解決するために、本発明の1つの側面からのスピニング成形方法は、板材を回転させながら加工具を用いて前記板材の成形対象領域をテーパー状に成形するスピニング成形方法であって、前記加工具を、前記板材に押圧しながら前記成形対象領域の内側端から外側端に向かって移動させ、前記外側端では前記加工具の位置を拘束した状態で前記板材を回転させる、ことを特徴とする。
In order to solve the above-mentioned problem, a spinning molding method according to one aspect of the present invention is a spinning molding method in which a molding target region of the plate material is molded into a tapered shape using a processing tool while rotating the plate material, The processing tool is moved from the inner end to the outer end of the region to be molded while being pressed against the plate material, and the plate material is rotated while the position of the processing tool is constrained at the outer end. And
上記の構成によれば、成形対象領域の外側端(すなわち、成形終了点)で加工具が待機させられるので、加工具の押圧跡が形成されることを防止できる。
According to the above configuration, since the processing tool is made to wait at the outer end of the molding target region (that is, the molding end point), it is possible to prevent the press mark of the processing tool from being formed.
また、本発明の別の側面からのスピニング成形方法は、板材を回転させながら加工具を用いて前記板材の成形対象領域をテーパー状に成形するスピニング成形方法であって、前記加工具を、前記板材に押圧しながら前記成形対象領域の内側端から外側端に向かって移動させ、前記外側端の近傍では前記加工具の軸方向送込速度および径方向進行速度を低下させる、ことを特徴とする。
Further, the spinning molding method according to another aspect of the present invention is a spinning molding method for forming a molding target region of the plate material into a tapered shape using a processing tool while rotating the plate material, The sheet material is moved from the inner end toward the outer end while being pressed against the plate material, and the axial feeding speed and the radial traveling speed of the processing tool are reduced in the vicinity of the outer end. .
上記の構成によれば、成形対象領域の外側端(すなわち、成形終了点)の近傍では板材がゆっくりと加工されるので、加工具の押圧跡が形成されることを防止できる。
According to the above configuration, the plate material is processed slowly in the vicinity of the outer end of the forming target region (that is, the forming end point), so that it is possible to prevent the press mark of the processing tool from being formed.
前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分と同一円周上に位置する部分を局所的に加熱しながら行ってもよい。この構成によれば、板材を加熱しない場合や板材を全体的に加熱する場合に比べて、板材における加工具が押圧される部分を集中的に加工することができる。このため、所望の形状を得るための加工具の操作が容易となる。
The pressing of the processing tool to the plate material may be performed while locally heating a portion of the plate material located on the same circumference as the portion where the processing tool is pressed. According to this structure, compared with the case where a board | plate material is not heated or the case where a board | plate material is heated as a whole, the part by which the processing tool in a board | plate material is pressed can be processed intensively. For this reason, operation of the processing tool for obtaining a desired shape becomes easy.
前記加工具は、前記板材の回転軸から遠ざかる方向に向かって縮径する断面台形状の成形ローラであり、前記成形ローラの前記板材への押圧を、成形ローラの大径部が板材に点接触し、かつ、成形ローラの側面と前記板材の回転軸に対する直交面とのなす角度が1度以上30度以下となる姿勢に前記成形ローラを保った状態で行ってもよい。この構成によれば、板材における加工具が押圧される部分よりも外側部分の反り上がりを成形ローラの側面で規制することができる。
The processing tool is a forming roller having a trapezoidal cross section whose diameter decreases in a direction away from the rotation axis of the plate material, and the large diameter portion of the forming roller makes point contact with the plate material when the forming roller is pressed against the plate material. In addition, the molding roller may be kept in a posture in which an angle formed between a side surface of the molding roller and a plane orthogonal to the rotation axis of the plate material is 1 degree or more and 30 degrees or less. According to this configuration, it is possible to restrict the warpage of the outer portion of the plate material from the portion where the processing tool is pressed by the side surface of the forming roller.
前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分が浮いた状態で行ってもよい。この構成によれば、従来のスピニング成形方法でよく用いられていた成形型(マンドレル)を用いる必要がなく、製造コストを低減することができる。
The pressing of the processing tool to the plate material may be performed in a state where a portion of the plate material where the processing tool is pressed is floated. According to this configuration, it is not necessary to use a mold (mandrel) often used in the conventional spinning molding method, and the manufacturing cost can be reduced.
本発明によれば、加工具の押圧跡が形成されることを防止できる。
According to the present invention, it is possible to prevent the pressing marks of the processing tool from being formed.
図1は、本発明の一実施形態に係るスピニング成形方法の説明図である。このスピニング成形方法は、板材1を回転させながら加工具3を用いて板材1の成形対象領域R(図2A参照)をテーパー状に成形する方法である。
FIG. 1 is an explanatory diagram of a spinning molding method according to an embodiment of the present invention. This spinning forming method is a method of forming the forming target region R (see FIG. 2A) of the plate 1 into a tapered shape using the processing tool 3 while rotating the plate 1.
板材1は、例えばフラットな円形状の板である。ただし、板材1の形状は、多角形状や楕円状であってもよい。また、板材1は、必ずしも全面に亘ってフラットである必要はなく、例えば中心部の厚さが周縁部の厚さよりも薄くまたは厚くてもよいし、全体または一部が予めテーパー状に加工されてもよい。板材1の材質は、特に限定されるものではないが、例えばチタン合金である。
The plate material 1 is, for example, a flat circular plate. However, the shape of the plate 1 may be polygonal or elliptical. Further, the plate 1 does not necessarily need to be flat over the entire surface. For example, the thickness of the central portion may be thinner or thicker than the thickness of the peripheral portion, and the whole or a part thereof is processed into a tapered shape in advance. May be. Although the material of the board | plate material 1 is not specifically limited, For example, it is a titanium alloy.
板材1は、回転シャフト2に固定される。すなわち、回転シャフト2の中心線が板材1の回転軸10である。板材1の回転軸10は、鉛直方向に平行であってもよいし、水平方向に平行であってもよいし、斜め方向を向いていてもよい。回転シャフト2は、図略の回転機構によって回転させられる。
The plate material 1 is fixed to the rotating shaft 2. That is, the center line of the rotating shaft 2 is the rotating shaft 10 of the plate 1. The rotation axis 10 of the plate 1 may be parallel to the vertical direction, may be parallel to the horizontal direction, or may be directed obliquely. The rotating shaft 2 is rotated by a rotating mechanism (not shown).
本実施形態では、回転シャフト2に成形型(マンドレル)が設けられておらず、スピニング成形開始前だけでなくスピニング成形の途中でも、板材1の中心部のみが回転シャフト2に支持される。すなわち、後述する加工具3の板材1への押圧は、板材1における加工具3が押圧される部分が浮いた状態で行われる。この構成によれば、従来のスピニング成形方法でよく用いられていた成形型(マンドレル)を用いる必要がなく、製造コストを低減することができる。ただし、回転シャフト2に成形型(マンドレル)が設けられていて、スピニング成形中は、板材1における加工具3が押圧される部分が成形型に支持されてもよい。
In the present embodiment, the rotary shaft 2 is not provided with a molding die (mandrel), and only the center portion of the plate 1 is supported by the rotary shaft 2 not only before the start of spinning molding but also during spinning molding. That is, the pressing of the processing tool 3 to be described later to the plate material 1 is performed in a state where the portion of the plate material 1 where the processing tool 3 is pressed is lifted. According to this configuration, it is not necessary to use a mold (mandrel) often used in the conventional spinning molding method, and the manufacturing cost can be reduced. However, a molding die (mandrel) is provided on the rotating shaft 2, and a portion of the plate 1 to which the processing tool 3 is pressed may be supported by the molding die during spinning molding.
加工具3は、図2Aおよび2Bに示すように、板材1に押圧されながら、成形対象領域Rの内側端(すなわち、成形開始点)Rsから外側端(すなわち、成形終了点)Reに向かって移動させられる。加工具3は、場所に応じた特定の軸方向送込速度で、板材1の回転軸10に沿う方向に移動させられて、板材1に押圧される。また、加工具3は、場所に応じた特定の径方向進行速度で、板材1の回転軸10から垂直に離れる方向に移動させられる。本実施形態では、加工具3として、板材1の回転に追従して回転する成形ローラ30が用いられている。ただし、加工具3は、成形ローラ30に限定されず、例えばヘラであってもよい。
As shown in FIGS. 2A and 2B, the processing tool 3 is pressed by the plate member 1 toward the outer end (that is, the molding end point) Re from the inner end (that is, the molding start point) Rs of the molding target region R. Moved. The processing tool 3 is moved in a direction along the rotation axis 10 of the plate material 1 at a specific axial direction feeding speed according to the place, and is pressed by the plate material 1. Moreover, the processing tool 3 is moved in the direction away from the rotating shaft 10 of the board | plate material 1 with the specific radial direction advancing speed according to a place. In the present embodiment, a forming roller 30 that rotates following the rotation of the plate 1 is used as the processing tool 3. However, the processing tool 3 is not limited to the forming roller 30, and may be a spatula, for example.
より詳しくは、成形ローラ30は、板材1の回転軸10から遠ざかる方向に向かって縮径する断面台形状の形状を有している。すなわち、成形ローラ30は、回転軸10側の大径の底面、回転軸10と反対側の小径の頂き面、およびそれらをつなぐテーパー状の側面31を有している。つまり、側面31と底面の間の環状のコーナー部が大径部、側面31と頂き面の間の環状のコーナー部が小径部である。ただし、加工具3としては、他の断面形状(例えば、断面菱形状や断面長丸状)の成形ローラを用いることも可能である。
More specifically, the forming roller 30 has a trapezoidal shape that is reduced in diameter toward the direction away from the rotary shaft 10 of the plate 1. In other words, the forming roller 30 has a large-diameter bottom surface on the rotating shaft 10 side, a small-diameter surface opposite to the rotating shaft 10, and a tapered side surface 31 connecting them. That is, the annular corner portion between the side surface 31 and the bottom surface is the large-diameter portion, and the annular corner portion between the side surface 31 and the top surface is the small-diameter portion. However, as the processing tool 3, it is also possible to use a forming roller having another cross-sectional shape (for example, a cross-sectional rhombus shape or a long cross-sectional shape).
加工具3として断面台形状の成形ローラ30が用いられた本実施形態では、成形ローラ30の板材1への押圧が、成形ローラ30の大径部が板材1に点接触し、かつ、成形ローラ30の側面31と板材1の回転軸10に対する直交面(すなわち、板材1と平行な面)とのなす角度θ(図2A参照)が1度以上30度以下となる姿勢に成形ローラ30を保った状態で行われる。
In the present embodiment in which the forming roller 30 having a trapezoidal cross section is used as the processing tool 3, the pressing of the forming roller 30 to the plate material 1 causes the large diameter portion of the forming roller 30 to make point contact with the plate material 1 and the forming roller. The forming roller 30 is maintained in a posture in which an angle θ (see FIG. 2A) formed by the side surface 31 of the plate 30 and a plane orthogonal to the rotation axis 10 of the plate 1 (that is, a plane parallel to the plate 1) is 1 degree or more and 30 degrees or less. It is done in the state.
さらに、本実施形態では、加工具3の板材1への押圧が、板材1における加工具3が押圧される部分と同一円周上に位置する部分が加熱器4によって局所的に加熱されながら行われる。ここで、「同一円周上」とは、板材1の回転軸10を中心とするある程度の幅のリング状範囲内に、加工具3が押圧される部分と加熱器4によって加熱される部分とが存することをいう。例えば、板材1の回転軸10から加工具3が押圧される部分までの距離の±10%の範囲内に、加熱器4によって加熱される部分が存していてもよい。
Further, in the present embodiment, the processing tool 3 is pressed against the plate material 1 while a portion of the plate material 1 located on the same circumference as the portion where the processing tool 3 is pressed is locally heated by the heater 4. Is called. Here, “on the same circumference” means a portion where the processing tool 3 is pressed and a portion heated by the heater 4 within a ring-shaped range having a certain width around the rotation axis 10 of the plate 1. It means that there exists. For example, the portion heated by the heater 4 may exist within a range of ± 10% of the distance from the rotating shaft 10 of the plate 1 to the portion where the processing tool 3 is pressed.
本実施形態では、加熱器4が板材1を裏側から加熱するように、加熱器4が板材1に対して加工具3と反対側に配置されている。ただし、加熱器4は、板材1を表側から加熱するように、板材1に対して加工具3と同じ側に配置されていてもよい。
In the present embodiment, the heater 4 is disposed on the opposite side of the processing tool 3 with respect to the plate material 1 so that the heater 4 heats the plate material 1 from the back side. However, the heater 4 may be arrange | positioned with respect to the board | plate material 1 on the same side as the processing tool 3 so that the board | plate material 1 may be heated from the front side.
加熱器4は、5k~400kHzの高周波数の交流電圧が印加されるコイル部を有する高周波誘導加熱器であることが望ましい。このような高周波誘導加熱器では、板材1の局所的な加熱を板材1の回転方向に連続的に行うことができるように、コイル部が、板材1の回転方向に延びる、板材1に沿った二重円弧状をなしていることが望ましい。ただし、加熱器4としては、ガスバーナーを用いてもよい。
The heater 4 is preferably a high-frequency induction heater having a coil portion to which a high-frequency AC voltage of 5 k to 400 kHz is applied. In such a high frequency induction heater, the coil portion extends along the plate material 1 extending in the rotation direction of the plate material 1 so that the local heating of the plate material 1 can be continuously performed in the rotation direction of the plate material 1. It is desirable to have a double arc shape. However, a gas burner may be used as the heater 4.
本実施形態のスピニング成形方法では、加工具3が成形対象領域Rの外側端Reに到達すると、加工具3の位置を拘束した状態で板材1を回転させる。図3は、スピニング成形終了直前の板材1への加工具3の押圧状態を示す。従来技術と同様に、加工具3が成形対象領域Rの外側端Reに到達した直後に加工具3が板材1から引き離されると、図4に示すように、板材1における加工具3を引き離した位置に、加工具3の形状に合う窪み(加工具3の押圧跡11)が形成される。これに対し、本実施形態では、成形対象領域Rの外側端Reで加工具3が待機させられるので、図5に示すように、加工具3の押圧跡11(図4参照)が形成されることを防止できる。
In the spinning molding method of the present embodiment, when the processing tool 3 reaches the outer end Re of the molding target region R, the plate material 1 is rotated in a state where the position of the processing tool 3 is constrained. FIG. 3 shows a pressing state of the processing tool 3 against the plate 1 immediately before the end of spinning molding. Similar to the prior art, when the processing tool 3 is pulled away from the plate 1 immediately after the processing tool 3 reaches the outer end Re of the molding target region R, the processing tool 3 in the plate 1 is pulled away as shown in FIG. A recess (press mark 11 of the processing tool 3) that matches the shape of the processing tool 3 is formed at the position. On the other hand, in this embodiment, since the processing tool 3 is made to stand by at the outer end Re of the molding target region R, as shown in FIG. 5, a press mark 11 (see FIG. 4) of the processing tool 3 is formed. Can be prevented.
ところで、板材1における加工具3が押圧される部分よりも外側部分は、加工具3に向かって反り上がることもある。これに対し、断面台形状の成形ローラ30を用い、成形ローラ30の姿勢を本実施形態のように保てば、板材1の外側部分の反り上がりを成形ローラ30の側面31で規制することができる。
By the way, the outer portion of the plate 1 than the portion where the processing tool 3 is pressed may warp toward the processing tool 3. On the other hand, if the forming roller 30 having a trapezoidal cross section is used and the posture of the forming roller 30 is maintained as in the present embodiment, the warping of the outer portion of the plate material 1 can be restricted by the side surface 31 of the forming roller 30. it can.
(変形例)
本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。 (Modification)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.
本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲で種々の変形が可能である。 (Modification)
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.
例えば、前記実施形態では、加工具3が成形対象領域Rの外側端Reに到達したときに加工具3を待機させたが、外側端Reの近傍では加工具3の軸方向押込速度および径方向進行速度を低下させてもよい。ここで、「外側端Reの近傍」は、外側端Reから内側に向かって成形対象領域Rの1/5を上限とする範囲であって、任意に設定可能な範囲である。例えば、加工具3が成形対象領域Rの外側端Reに隣接する終了近接点に到達したときに加工具3の軸方向送込速度および径方向進行速度を終了近接点に到達する前の半分以下に低下させてもよい。
For example, in the above-described embodiment, when the processing tool 3 reaches the outer end Re of the molding target region R, the processing tool 3 is put on standby, but in the vicinity of the outer end Re, the axial pushing speed and the radial direction of the processing tool 3 are set. You may reduce advancing speed. Here, “in the vicinity of the outer end Re” is a range in which the upper limit is 1/5 of the molding target region R from the outer end Re to the inner side, and can be arbitrarily set. For example, when the processing tool 3 reaches the end proximity point adjacent to the outer end Re of the molding target region R, the axial feed speed and the radial direction traveling speed of the processing tool 3 are less than half before reaching the end proximity point. It may be lowered.
上記の構成によれば、成形対象領域Rの外側端Reの近傍では板材1がゆっくりと加工されるので、図5に示すように、加工具3の押圧跡11(図4参照)が形成されることを防止できる。
According to said structure, since the board | plate material 1 is processed slowly in the vicinity of the outer side edge Re of the shaping | molding object area | region R, as shown in FIG. 5, the press trace 11 (refer FIG. 4) of the processing tool 3 is formed. Can be prevented.
また、板材1への加工具3の押圧は、板材1を局所的に加熱する代わりに、板材1を全体的に加熱した状態で、または板材1を加熱せずに、行ってもよい。ただし、前記実施形態のように、板材1を局所的に加熱すれば、板材1を加熱しない場合や板材1を全体的に加熱する場合に比べて、板材1における加工具3が押圧される部分を集中的に加工することができる。このため、所望の形状を得るための加工具3の操作が容易となる。
Further, the pressing of the processing tool 3 to the plate material 1 may be performed in a state where the plate material 1 is entirely heated, or without heating the plate material 1 instead of locally heating the plate material 1. However, if the plate material 1 is locally heated as in the above-described embodiment, the portion in which the processing tool 3 is pressed in the plate material 1 is compared with the case where the plate material 1 is not heated or the plate material 1 is heated as a whole. Can be processed intensively. For this reason, operation of the processing tool 3 for obtaining a desired shape becomes easy.
1 板材
10 回転軸
3 加工具
30 成形ローラ
31 側面 DESCRIPTION OFSYMBOLS 1 Plate material 10 Rotating shaft 3 Processing tool 30 Forming roller 31 Side surface
10 回転軸
3 加工具
30 成形ローラ
31 側面 DESCRIPTION OF
Claims (8)
- 板材を回転させながら加工具を用いて前記板材の成形対象領域をテーパー状に成形するスピニング成形方法であって、
前記加工具を、前記板材に押圧しながら前記成形対象領域の内側端から外側端に向かって移動させ、前記外側端では前記加工具の位置を拘束した状態で前記板材を回転させる、スピニング成形方法。 A spinning molding method for forming a molding target region of the plate material into a tapered shape using a processing tool while rotating the plate material,
A spinning molding method in which the processing tool is moved from an inner end to an outer end of the molding target area while being pressed against the plate material, and the plate material is rotated while the position of the processing tool is constrained at the outer end. . - 前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分と同一円周上に位置する部分を局所的に加熱しながら行う、請求項1に記載のスピニング成形方法。 The spinning molding method according to claim 1, wherein the processing tool is pressed against the plate material while locally heating a portion of the plate material located on the same circumference as the portion to which the processing tool is pressed.
- 前記加工具は、前記板材の回転軸から遠ざかる方向に向かって縮径する断面台形状の成形ローラであり、前記成形ローラの前記板材への押圧を、成形ローラの大径部が板材に点接触し、かつ、成形ローラの側面と前記板材の回転軸に対する直交面とのなす角度が1度以上30度以下となる姿勢に前記成形ローラを保った状態で行う、請求項1または2に記載のスピニング成形方法。 The processing tool is a forming roller having a trapezoidal cross section whose diameter decreases in a direction away from the rotation axis of the plate material, and the large diameter portion of the forming roller makes point contact with the plate material when the forming roller is pressed against the plate material. And it carries out in the state which maintained the said forming roller in the attitude | position from which the angle which the side surface of the forming roller and the orthogonal surface with respect to the rotating shaft of the said board | plate material make is 1 degree or more and 30 degrees or less. Spinning molding method.
- 前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分が浮いた状態で行う、請求項1~3のいずれか一項に記載のスピニング成形方法。 The spinning molding method according to any one of claims 1 to 3, wherein the processing tool is pressed against the plate material in a state where a portion of the plate material to be pressed by the processing tool is floated.
- 板材を回転させながら加工具を用いて前記板材の成形対象領域をテーパー状に成形するスピニング成形方法であって、
前記加工具を、前記板材に押圧しながら前記成形対象領域の内側端から外側端に向かって移動させ、前記外側端の近傍では前記加工具の軸方向送込速度および径方向進行速度を低下させる、スピニング成形方法。 A spinning molding method for forming a molding target region of the plate material into a tapered shape using a processing tool while rotating the plate material,
The processing tool is moved from the inner end to the outer end of the molding target region while being pressed against the plate material, and the axial feeding speed and the radial traveling speed of the processing tool are reduced in the vicinity of the outer end. Spinning molding method. - 前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分と同一円周上に位置する部分を局所的に加熱しながら行う、請求項5に記載のスピニング成形方法。 The spinning molding method according to claim 5, wherein the pressing of the processing tool to the plate material is performed while locally heating a portion of the plate material located on the same circumference as the portion where the processing tool is pressed.
- 前記加工具は、前記板材の回転軸から遠ざかる方向に向かって縮径する断面台形状の成形ローラであり、前記成形ローラの前記板材への押圧を、成形ローラの大径部が板材に点接触し、かつ、成形ローラの側面と前記板材の回転軸に対する直交面とのなす角度が1度以上30度以下となる姿勢に前記成形ローラを保った状態で行う、請求項5または6に記載のスピニング成形方法。 The processing tool is a forming roller having a trapezoidal cross section whose diameter decreases in a direction away from the rotation axis of the plate material, and the large diameter portion of the forming roller makes point contact with the plate material when the forming roller is pressed against the plate material. And it carries out in the state which kept the said forming roller in the attitude | position from which the angle which the side surface of a forming roller and the orthogonal surface with respect to the rotating shaft of the said board | plate material make is 1 degree or more and 30 degrees or less. Spinning molding method.
- 前記加工具の前記板材への押圧を、前記板材における前記加工具が押圧される部分が浮いた状態で行う、請求項5~7のいずれか一項に記載のスピニング成形方法。 The spinning molding method according to any one of claims 5 to 7, wherein the processing tool is pressed against the plate material in a state where a portion of the plate material to which the processing tool is pressed is floated.
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- 2015-10-13 CN CN201580059003.5A patent/CN107107147B/en not_active Expired - Fee Related
- 2015-10-13 EP EP15855067.3A patent/EP3213832B1/en active Active
- 2015-10-13 WO PCT/JP2015/005181 patent/WO2016067537A1/en active Application Filing
- 2015-10-13 US US15/523,584 patent/US20170304885A1/en not_active Abandoned
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JPH11285750A (en) * | 1998-04-02 | 1999-10-19 | Toyota Motor Corp | Method for drawing cylindrical member and apparatus therefor |
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