JP4516369B2 - Casting mold - Google Patents

Casting mold Download PDF

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JP4516369B2
JP4516369B2 JP2004214176A JP2004214176A JP4516369B2 JP 4516369 B2 JP4516369 B2 JP 4516369B2 JP 2004214176 A JP2004214176 A JP 2004214176A JP 2004214176 A JP2004214176 A JP 2004214176A JP 4516369 B2 JP4516369 B2 JP 4516369B2
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pressure pin
mold
cavity
hydraulic cylinder
pin
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JP2006035229A (en
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俊仁 竹内
伸郎 川内
崇成 矢崎
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Honda Motor Co Ltd
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Description

本発明は、金型本体にキャビティ型が嵌め込まれている鋳造金型に関し、詳しくはキャビティ内の溶湯を一部又は全部を加圧する加圧ピンと該加圧ピンを移動させる加圧ピン移動手段とを備えた鋳造金型に関する。   The present invention relates to a casting mold in which a cavity mold is fitted in a mold body, and more specifically, a pressure pin that presses part or all of the molten metal in the cavity, and a pressure pin moving means that moves the pressure pin. The present invention relates to a casting mold provided with

金型本体に嵌め込まれているキャビティ型のキャビティ内に充填された溶湯(充填物)が半凝固状態にあるときに、得られる鋳造品の品質向上等の目的で、キャビティ内の溶湯を部分的に加圧するための部分加圧機構が設けられている。従来の部分加圧機構は、加圧ピンと、この加圧ピンを移動させる油圧シリンダ(加圧シリンダ)のシリンダロッドとが同軸線上にて直結されるように構成されている(例えば、特許文献1参照。)。   When the molten metal (filled material) filled in the cavity of the cavity mold fitted in the mold body is in a semi-solid state, the molten metal in the cavity is partially used for the purpose of improving the quality of the cast product obtained. A partial pressurizing mechanism is provided for pressurizing at a predetermined pressure. A conventional partial pressure mechanism is configured such that a pressure pin and a cylinder rod of a hydraulic cylinder (pressure cylinder) that moves the pressure pin are directly connected on a coaxial line (for example, Patent Document 1). reference.).

即ち、図4に示すように、従来では油圧シリンダ100は金型本体101にボルト102によって固定され、加圧ピン103はキャビティ型104内に形成したガイド孔104a内を摺動自在に挿通されている。加圧ピン103の他端側(図の右端側)には雌ねじが螺刻されており、油圧シリンダ100のシリンダロッド105の先端側に螺刻された雄ねじをねじ込むことにより、加圧ピン103と油圧シリンダ100のシリンダロッド105が同軸上で直結されている。なお、キャビティ型104のキャビティ内の溶湯(不図示)がガイド孔104a側に侵入しないように、ガイド孔104aと加圧ピン103との間の隙間は100μm程度以下に設定されている。
特開平7−308748号公報(図1)
That is, as shown in FIG. 4, conventionally, the hydraulic cylinder 100 is fixed to the mold body 101 by the bolt 102, and the pressure pin 103 is slidably inserted in the guide hole 104 a formed in the cavity mold 104. Yes. A female screw is threaded on the other end side (the right end side in the figure) of the pressurizing pin 103. By screwing the male thread threaded on the tip end side of the cylinder rod 105 of the hydraulic cylinder 100, The cylinder rod 105 of the hydraulic cylinder 100 is directly connected on the same axis. The gap between the guide hole 104a and the pressure pin 103 is set to about 100 μm or less so that molten metal (not shown) in the cavity of the cavity mold 104 does not enter the guide hole 104a side.
Japanese Patent Laid-Open No. 7-308748 (FIG. 1)

ところで、従来では、加圧ピン103の摺動方向は、通常型開き方向に平行であり、油圧シリンダ(加圧シリンダ)100のシリンダロッド105と加圧ピン103とが同軸線上にて直結されるように構成され、ガイド孔104aと加圧ピン103との隙間100μm程度の公差が設けられている。   By the way, conventionally, the sliding direction of the pressure pin 103 is parallel to the normal mold opening direction, and the cylinder rod 105 of the hydraulic cylinder (pressure cylinder) 100 and the pressure pin 103 are directly connected on a coaxial line. Thus, a clearance of about 100 μm between the guide hole 104a and the pressure pin 103 is provided.

また、上記キャビティ型104の材質はある程度硬質な材料(例えば、工具鋼(SKD60)を使用し、金型本体101は上記工具鋼(SKD60)よりも廉価な材料(例えば鋳鋼(FCD60)を使用して、コストの低減を図っている。よって、上記工具鋼(SKD60)と鋳鋼(FCD60)は熱膨張係数が異なることから、熱膨張量に差が生じる。   The cavity mold 104 is made of a material that is somewhat hard (for example, tool steel (SKD60)), and the mold body 101 is made of a material that is less expensive than the tool steel (SKD60) (for example, cast steel (FCD60)). Therefore, since the tool steel (SKD60) and the cast steel (FCD60) have different coefficients of thermal expansion, there is a difference in the amount of thermal expansion.

即ち、鋳造時に高温になる金型本体101とキャビティ型104の熱膨張量がそれぞれ異なる(この場合には、キャビティ型104側の方が熱膨張量が大きい)ことによって、例えば図4の場合では、キャビティ型104が加圧ピン103に対して直角方向(図の矢印A方向)に大きく熱膨張することにより、加圧ピン103を矢印A方向に曲げようとする力が働くことになる。   That is, the mold body 101 and the cavity mold 104 that are heated at the time of casting have different thermal expansion amounts (in this case, the thermal expansion amount is larger on the cavity mold 104 side), for example, in the case of FIG. The cavity mold 104 greatly expands in the direction perpendicular to the pressure pin 103 (in the direction of arrow A in the figure), so that a force for bending the pressure pin 103 in the direction of arrow A acts.

このため、加圧ピン103の他端側(図の右端側)は、油圧シリンダ100のシリンダロッド105に螺合によって直接結合されているので、キャビティ型104の矢印A方向への熱膨張による力によって加圧ピン103にたわみが生じ、部分加圧時に加圧ピン103がガイド孔104a内に片当たりして移動不良が発生することがあった。   For this reason, since the other end side (the right end side in the figure) of the pressure pin 103 is directly coupled to the cylinder rod 105 of the hydraulic cylinder 100 by screwing, the force due to the thermal expansion of the cavity mold 104 in the arrow A direction. As a result, the pressure pin 103 may bend, and the pressure pin 103 may come into contact with the guide hole 104a during partial pressurization, resulting in poor movement.

また、加圧ピン103の摺動方向は、上記したように通常型開き方向に平行であり、油圧シリンダ(加圧シリンダ)100のシリンダロッド105と加圧ピン103とが同軸線上にて直結されるように構成されている。この場合、型の熱膨張量の差は、型開き方向即ち、金型本体101とキャビティ型104とが接する面から製品面たるキャビティの向きに生じ易く、通常の加圧ピン103の摺動方向、即ち型開き方向に平行の場合であると、この差からくるガイド孔104aの位置変化の影響は少なく、ガイド孔104aと加圧ピン103との隙間100μm程度の公差にて、熱膨張量の差を吸収できることが多かった。   The sliding direction of the pressure pin 103 is parallel to the normal mold opening direction as described above, and the cylinder rod 105 of the hydraulic cylinder (pressure cylinder) 100 and the pressure pin 103 are directly connected on the coaxial line. It is comprised so that. In this case, the difference in the amount of thermal expansion of the mold is likely to occur in the mold opening direction, that is, in the direction from the surface where the mold body 101 and the cavity mold 104 are in contact to the cavity that is the product surface. That is, in the case of being parallel to the mold opening direction, the influence of the position change of the guide hole 104a resulting from this difference is small, and the thermal expansion amount of the clearance between the guide hole 104a and the pressure pin 103 is about 100 μm. In many cases, the difference could be absorbed.

ところで、加圧ピンの移動不良の発生は、型開き方向に対して角度がつけばつくほど生じ易く、型開き方向に対し90°即ち、垂直方向に摺動させるような構造のものに移動不良が発生し、特に型開き方向に垂直に摺動する加圧ピンを備えた鋳造金型を製造することはできなかった。   By the way, the occurrence of improper movement of the pressure pin tends to occur as the angle with respect to the mold opening direction increases, and the improper movement of the pin has a structure that slides 90 ° to the mold opening direction, that is, in the vertical direction. In particular, it was not possible to manufacture a casting mold having a pressure pin that slides perpendicularly to the mold opening direction.

そこで本発明は、キャビティの熱膨張による力が加圧ピンに作用した場合でも、加圧ピンにたわみが生じることを防止することができ、特に加圧ピンの摺動方向が型開き方向に垂直であっても確実に摺動し、加圧ピンの配設自由度が高い鋳造金型を提供することを目的とする。   Therefore, the present invention can prevent the pressure pin from being bent even when the force due to the thermal expansion of the cavity acts on the pressure pin. In particular, the sliding direction of the pressure pin is perpendicular to the mold opening direction. Even so, an object is to provide a casting mold that slides reliably and has a high degree of freedom in disposing pressure pins.

上記目的を達成するために本発明は、金型本体に嵌め込まれているキャビティ型に形成されたガイド孔に摺動自在に挿通され、先端側をキャビティの内部に入れて前記キャビティの内部に充填された溶湯の一部又は全部を加圧する加圧ピンと、前記加圧ピンを移動させて前記キャビティ内に出し入れさせる加圧ピン移動手段とを備えた鋳造金型であって、前記金型本体内にて前記加圧ピンの後端側と前記加圧ピン移動手段との間を連結手段を介して連結し、前記連結手段は、前記加圧ピンの後端側を該加圧ピンの軸線方向に垂直な面に沿って移動可能に連結したことを特徴としている。 In order to achieve the above object, the present invention is slidably inserted into a guide hole formed in a cavity mold fitted in a mold body, and the inside of the cavity is filled by inserting the tip side into the cavity. A casting mold comprising a pressure pin for pressing part or all of the molten metal and a pressure pin moving means for moving the pressure pin into and out of the cavity. And connecting the rear end side of the pressurizing pin and the pressurizing pin moving means via connecting means, and the connecting means connects the rear end side of the pressurizing pin in the axial direction of the pressurizing pin. It is characterized in that it is connected so as to be movable along a plane perpendicular to.

また、前記加圧ピンの摺動方向が、前記鋳造金型の型開き方向に対して垂直であることを特徴としている。   Further, the sliding direction of the pressure pin is perpendicular to the mold opening direction of the casting mold.

(作用)
本発明によれば、鍛造時に高温になるキャビティ型と金型本体との熱膨張係数が異なる場合に、キャビティ型と金型本体との熱膨張量の違いによって、加圧ピンと加圧ピン移動手段との間の連結部分に加圧ピンの軸線方向に対して垂直の力が作用する場合でも、連結手段によって加圧ピンの後端側を該加圧ピンの軸線方向に垂直な面に沿って移動可能に連結しているので、加圧ピンの軸線方向に対して垂直に作用する力を吸収することができる。
(Function)
According to the present invention, when the coefficient of thermal expansion between the cavity mold and the mold main body, which becomes high during forging, is different, the pressure pin and the pressure pin moving means depend on the difference in thermal expansion amount between the cavity mold and the mold main body. Even when a force perpendicular to the axial direction of the pressure pin acts on the connecting portion between the pressure pin and the rear end side of the pressure pin by the connecting means along a plane perpendicular to the axial direction of the pressure pin. Since it is connected so that it can move, the force which acts perpendicularly to the direction of an axis of a pressure pin can be absorbed.

請求項1に記載の発明によれば、金型本体内にて加圧ピンの後端側と加圧ピン移動手段との間を連結手段を介して連結し、連結手段は、加圧ピンの後端側を該加圧ピンの軸線方向に垂直な面に沿って移動可能に連結しているので、キャビティ型と金型本体との熱膨張量の違いによって、加圧ピンと加圧ピン移動手段との間の連結部分に加圧ピンの軸線方向に対して垂直の力が作用する場合でも、加圧ピンの軸線方向に対して垂直に作用する力を吸収することができ、加圧ピンのたわみを防止することができる。 According to the first aspect of the present invention, the rear end side of the pressure pin and the pressure pin moving means are connected via the connecting means in the mold body, Since the rear end side is connected so as to be movable along a plane perpendicular to the axial direction of the pressurizing pin, the pressurizing pin and the pressurizing pin moving means depend on the amount of thermal expansion between the cavity mold and the mold body. Even when a force perpendicular to the axial direction of the pressure pin acts on the connecting portion between the pressure pin, the force acting perpendicular to the axial direction of the pressure pin can be absorbed. Deflection can be prevented.

また、請求項2に記載の発明によれば、加圧ピンの摺動方向が、鋳造金型の型開き方向に対して垂直であっても、連結手段によって加圧ピンの後端側を該加圧ピンの軸線方向に垂直な面に対して微動自在に連結しているので、加圧ピンの軸線方向に対して垂直に作用する力を吸収して、加圧ピンにたわみが生じることが防止されることにより、加圧ピンを確実に摺動させることができ、加圧ピンの配設自由度を高めることができる。   According to the second aspect of the present invention, even if the sliding direction of the pressure pin is perpendicular to the mold opening direction of the casting mold, the rear end side of the pressure pin is moved by the connecting means. Since it is connected to the surface perpendicular to the axial direction of the pressure pin so as to be movable, the force acting perpendicular to the axial direction of the pressure pin is absorbed, and the pressure pin may bend. By being prevented, the pressure pin can be slid reliably, and the degree of freedom of arrangement of the pressure pin can be increased.

以下、本発明を図示の実施形態に基づいて説明する。図1は、本発明の実施形態に係る鍛造金型を示す概略断面図である。
〈実施形態1〉
図1に示すように、本実施形態における鍛造金型は、金型本体1にキャビティ型2を嵌め込むようにして構成されており、キャビティ型2に形成したガイド孔2aには、加圧ピン3が図の左右方向に摺動自在に挿通されている。なお、キャビティ型2の材質はある程度硬質な材料(例えば、工具鋼(SKD60)であり、金型本体1は工具鋼(SKD60)よりも廉価な材料(例えば鋳鋼(FCD60)であることにより、金型本体1とキャビティ型2の熱膨張係数は異なっている。加圧ピン3の後端側(図の右側)は、連結部材4を介して油圧シリンダ5のシリンダロッド5aに連結されている(連結部材4による連結構造については後述する)。油圧シリンダ5は金型本体1にボルト6によって固定されている。
Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 is a schematic cross-sectional view showing a forging die according to an embodiment of the present invention.
<Embodiment 1>
As shown in FIG. 1, the forging die in this embodiment is configured such that a cavity die 2 is fitted into a die body 1, and a pressure pin 3 is inserted into a guide hole 2 a formed in the cavity die 2. It is slidably inserted in the left-right direction in the figure. The cavity mold 2 is made of a material that is hard to some extent (for example, tool steel (SKD60), and the mold body 1 is made of a material that is less expensive than the tool steel (SKD60) (for example, cast steel (FCD60)). The thermal expansion coefficients of the mold body 1 and the cavity mold 2 are different from each other, and the rear end side (the right side in the figure) of the pressure pin 3 is connected to the cylinder rod 5a of the hydraulic cylinder 5 via the connection member 4 ( The connection structure by the connection member 4 will be described later.) The hydraulic cylinder 5 is fixed to the mold body 1 by bolts 6.

加圧ピン3は、油圧シリンダ5の駆動によりキャビティ型2の内部(図では不図示)に対してその先端側(図の左側)が出し入れ自在に移動し、キャビティ型2のキャビティ内部(不図示)に充填された溶湯(不図示)が半凝固状態にあるときに、加圧ピン3の先端側(図の左側)をキャビティ型2のキャビティ内部(不図示)に入れて、この半凝固の溶湯(充填物)を部分的に加圧するものである。なお、キャビティ型2のキャビティ内部の溶湯がガイド孔2a側に侵入しないように、ガイド孔2aと加圧ピン3との間の隙間は100μm程度以下に設定されている。   The pressure pin 3 is driven by the hydraulic cylinder 5 so that its tip side (left side in the figure) can be moved in and out with respect to the inside of the cavity mold 2 (not shown in the figure). When the molten metal (not shown) filled in () is in a semi-solid state, the tip end side (left side in the figure) of the pressure pin 3 is placed inside the cavity (not shown) of the cavity mold 2 and this semi-solid state is obtained. The molten metal (filler) is partially pressurized. The gap between the guide hole 2a and the pressure pin 3 is set to about 100 μm or less so that the molten metal inside the cavity of the cavity mold 2 does not enter the guide hole 2a side.

連結部材4は、加圧ピン連結部材4aと油圧シリンダ連結部材4bと連結リング部材4cとで構成されている。   The connecting member 4 includes a pressure pin connecting member 4a, a hydraulic cylinder connecting member 4b, and a connecting ring member 4c.

加圧ピン連結部材4aの一端側(加圧ピン3側)には、周囲に雄ねじが螺刻された小径の軸部4dが形成され、他端側(油圧シリンダ5側)には、加圧ピン3と同じ径の円頭部4eが形成されており、軸部4dは、加圧ピン3の後端面側に形成した雌ねじに螺合されて連結されている。また、円頭部4eの端面には、レンチ等によって軸部4dの雄ねじを加圧ピン3内の雌ねじにねじ込むための角穴4fが形成されている。   A small-diameter shaft portion 4d is formed on one end side (pressure pin 3 side) of the pressure pin connecting member 4a, and a male screw is threaded around it, and a pressure is applied to the other end side (hydraulic cylinder 5 side). A circular head 4e having the same diameter as that of the pin 3 is formed, and the shaft portion 4d is screwed and connected to a female screw formed on the rear end face side of the pressure pin 3. Further, a square hole 4f for screwing the male screw of the shaft portion 4d into the female screw in the pressure pin 3 by a wrench or the like is formed on the end face of the circular head 4e.

油圧シリンダ連結部材4bの一端面側(油圧シリンダ5側)内径には雌ねじが螺刻されており、この雌ねじに油圧シリンダ5のシリンダロッド5aの先端側に螺刻された雄ねじが螺合されて連結されている。油圧シリンダ連結部材4bの他端面側には、加圧ピン連結部材4aの円頭部4eの端面が摺動自在に接している。油圧シリンダ連結部材4bの軸部は、加圧ピン連結部材4aの円頭部4eよりも数mm程度大径に形成されており、油圧シリンダ連結部材4bの、加圧ピン連結部材4aの円頭部4e側付近の外周には雄ねじが螺刻されている。   A female thread is threaded on the inner diameter of one end surface (hydraulic cylinder 5 side) of the hydraulic cylinder connecting member 4b, and a male thread threaded on the distal end side of the cylinder rod 5a of the hydraulic cylinder 5 is threaded onto this female thread. It is connected. The end face of the circular head 4e of the pressure pin connecting member 4a is slidably in contact with the other end face side of the hydraulic cylinder connecting member 4b. The shaft portion of the hydraulic cylinder connecting member 4b is formed to have a diameter of several millimeters larger than the circular head portion 4e of the pressure pin connecting member 4a, and the head of the pressure pin connecting member 4a of the hydraulic cylinder connecting member 4b. A male screw is threaded on the outer periphery near the portion 4e.

なお、この雄ねじが螺刻されている部分は、油圧シリンダ5側付近の外周よりも少し小径に形成されている。また、油圧シリンダ連結部材4bの外周面には偶数個の締め付け用面座(不図示)が形成されており、スパナ等によってシリンダロッド5aに容易に締め付けることができる。   Note that a portion where the male screw is threaded is formed to have a slightly smaller diameter than the outer periphery in the vicinity of the hydraulic cylinder 5 side. Further, an even number of fastening seats (not shown) are formed on the outer peripheral surface of the hydraulic cylinder connecting member 4b, and can be easily fastened to the cylinder rod 5a with a spanner or the like.

連結リング部材4cの一端側(油圧シリンダ5側)は大口径(油圧シリンダ連結部材4bの直径と同じ径)の筒状に形成されており、この内周面の端面から中央部には雌ねじが螺刻されており、この雌ねじに油圧シリンダ連結部材4bの周面に螺刻された雄ねじが螺合されて連結されている。また、連結リング部材4cの前記内周面の後方側には、1〜2mm程度の隙間を有するようにして加圧ピン連結部材4aの円頭部4eが位置している。   One end side (hydraulic cylinder 5 side) of the connecting ring member 4c is formed in a cylindrical shape having a large diameter (the same diameter as that of the hydraulic cylinder connecting member 4b), and an internal thread is provided from the end surface of the inner peripheral surface to the central portion. A male screw threaded on the peripheral surface of the hydraulic cylinder connecting member 4b is screwed and connected to the female screw. In addition, a circular head 4e of the pressure pin connecting member 4a is located on the rear side of the inner peripheral surface of the connecting ring member 4c so as to have a gap of about 1 to 2 mm.

連結リング部材4cの他端側(加圧ピン3側)には、内側方向に厚みを有する係止部4gが形成されており、係止部4gの中央部には、加圧ピン連結部材4aの軸部4dの円頭部4e側(この部分には雄ねじは形成されていない)が、1〜2mm程度の隙間を有するようにして挿通される円形状の開口穴4hが設けられている。連結リング部材4cの係止部4gの両面には、加圧ピン連結部材4aの円頭部4eと加圧ピン3の端面がそれぞれ摺動自在に接している。また、連結リング部材4cの周面には偶数個の締め付け用面座(不図示)が形成されており、スパナ等によって容易に着脱することができる。   On the other end side (pressure pin 3 side) of the connecting ring member 4c, a locking portion 4g having a thickness in the inner direction is formed, and the pressure pin connecting member 4a is formed at the center of the locking portion 4g. A circular opening hole 4h is provided on the side of the circular head 4e of the shaft portion 4d (a male screw is not formed in this portion) so as to be inserted so as to have a gap of about 1 to 2 mm. The circular head 4e of the pressure pin connection member 4a and the end surface of the pressure pin 3 are slidably in contact with both surfaces of the locking portion 4g of the connection ring member 4c. Further, an even number of fastening face seats (not shown) are formed on the peripheral surface of the connecting ring member 4c, and can be easily attached and detached with a spanner or the like.

図1のように、加圧ピン3と加圧ピン連結部材4aと油圧シリンダ連結部材4bと油圧シリンダ5のシリンダロッド5aは、それぞれ同軸線上に位置している。よって、油圧シリンダ5のシリンダロッド5aを駆動することにより、連結部材4を介して連結されている加圧ピン3は、キャビティ型2のガイド孔2a内を左右方向に摺動自在に移動することができる。   As shown in FIG. 1, the pressurizing pin 3, the pressurizing pin connecting member 4a, the hydraulic cylinder connecting member 4b, and the cylinder rod 5a of the hydraulic cylinder 5 are respectively positioned on the same axis. Therefore, by driving the cylinder rod 5a of the hydraulic cylinder 5, the pressure pin 3 connected via the connecting member 4 moves slidably in the left-right direction within the guide hole 2a of the cavity mold 2. Can do.

そして、キャビティ型2のキャビティ内部(不図示)に溶湯(充填物)を充填した初期時には、図2(a)に示すように、油圧シリンダ5のシリンダロッド5aは駆動されておらず、加圧ピン3の先端側はキャビティ型2のキャビティ内部に押し出されていない。その後、キャビティ型2のキャビティ内部に充填された溶湯が半凝固状態にあるときに、得られる鋳造品の品質向上等の目的で、キャビティ型2のキャビティ内部の溶湯を部分的に加圧するために、図2(b)に示すように、油圧シリンダ5のシリンダロッド5aを駆動する。   When the molten metal (filled material) is filled in the cavity (not shown) of the cavity mold 2, the cylinder rod 5a of the hydraulic cylinder 5 is not driven as shown in FIG. The tip side of the pin 3 is not extruded into the cavity of the cavity mold 2. Thereafter, when the molten metal filled in the cavity of the cavity mold 2 is in a semi-solid state, in order to partially pressurize the molten metal inside the cavity of the cavity mold 2 for the purpose of improving the quality of the obtained cast product. As shown in FIG. 2B, the cylinder rod 5a of the hydraulic cylinder 5 is driven.

シリンダロッド5aが駆動されると、シリンダロッド5aに連結されている油圧シリンダ連結部材4bの端面が加圧ピン連結部材4aの円頭部4eを押すことにより(このとき、連結リング部材4cの係止部4gの加圧ピン3側の端面も加圧ピン3の後端面を押している)、シリンダロッド5aと同軸上に加圧ピン3がガイド孔2a内を図の左方向に摺動自在に移動し、加圧ピン3の先端でキャビティ2の内部(不図示)の溶湯を部分加圧する。   When the cylinder rod 5a is driven, the end surface of the hydraulic cylinder connecting member 4b connected to the cylinder rod 5a pushes the circular head 4e of the pressure pin connecting member 4a (at this time, the engagement of the connecting ring member 4c). The end face of the stopper 4g on the pressure pin 3 side also presses the rear end face of the pressure pin 3), and the pressure pin 3 is slidable in the guide hole 2a in the left direction in the figure on the same axis as the cylinder rod 5a. The molten metal inside the cavity 2 (not shown) is partially pressurized with the tip of the pressure pin 3.

ところで、この加圧ピン3による溶湯の部分加圧時、及びこの部分加圧時における鍛造動作中には、金型本体1とキャビティ型2は高温になっている。このため、材質の異なる金型本体1とキャビティ型2は、熱膨張係数がそれぞれ異なることによって熱膨張量に差が生じる(この場合には、キャビティ型2側の方が熱膨張量が大きい)。よって、図2(c)に示すように、キャビティ型2が加圧ピン3に対して直角方向(図の矢印A方向)に大きく熱膨張することにより、加圧ピン3を矢印A方向に曲げようとする力が働くことになる。   By the way, the mold main body 1 and the cavity mold 2 are at a high temperature during the partial pressurization of the molten metal by the pressurizing pin 3 and during the forging operation during the partial pressurization. For this reason, the mold body 1 and the cavity mold 2 of different materials have different thermal expansion amounts due to different thermal expansion coefficients (in this case, the thermal expansion amount is larger on the cavity mold 2 side). . Therefore, as shown in FIG. 2 (c), the cavity mold 2 greatly expands in the direction perpendicular to the pressure pin 3 (in the direction of arrow A in the figure), thereby bending the pressure pin 3 in the direction of arrow A. The power to try will work.

なお、図2(c)は、上記した溶湯の部分加圧を終えてキャビティ型2のキャビティ内部から加圧ピン3を引き戻して元の位置まで移動させた状態である。このとき、シリンダロッド5aの駆動によって連結リング部材4cの係止部4gの円頭部4e側の面が円頭部4eを押すことにより、加圧ピン3が元の位置(図2(a)の位置)に戻る。   FIG. 2C shows a state in which the partial pressurization of the molten metal is finished and the pressure pin 3 is pulled back from the cavity of the cavity mold 2 and moved to the original position. At this time, when the cylinder rod 5a is driven, the surface on the circular head 4e side of the locking portion 4g of the connecting ring member 4c presses the circular head 4e, so that the pressure pin 3 is moved to its original position (FIG. 2 (a)). Return to position.

この際、本発明においては、図2(c)に示すように、キャビティ型2が熱膨張して加圧ピン3に対して矢印A方向への力が作用すると、加圧ピン3の矢印A方向への微小な移動に応じて加圧ピン3の後端側に連結されている加圧ピン連結部材4aの軸部4dが開口穴4h内において矢印A方向に微小に移動することにより、加圧ピン3に対して矢印A方向に曲げようとする力を吸収することができる。 At this time, in the present invention, as shown in FIG. 2C, when the cavity mold 2 is thermally expanded and a force in the direction of the arrow A acts on the pressure pin 3, the arrow A of the pressure pin 3 by the shaft portion 4d of the pressure pin connecting member 4a which is connected to the rear end side of the pressure pin 3 according to a small movement in the direction to move minutely in the direction of arrow a in the opening hole 4h, pressurized A force to bend the pressure pin 3 in the direction of arrow A can be absorbed.

よって、従来のように加圧ピン3がガイド孔2a内に片当たりして移動不良が発生することが防止されることにより、溶湯の部分加圧時において加圧ピン3を長期にわたって安定して円滑に移動させることができる。   Therefore, the pressure pin 3 is prevented from moving due to the one-piece contact in the guide hole 2a as in the prior art, so that the pressure pin 3 can be stably maintained for a long time when the molten metal is partially pressurized. It can be moved smoothly.

また、上記した連結部材4を加圧ピン3及び油圧シリンダ5のシリンダロッド5aとの連結状態を解除して取り外すときは、油圧シリンダ5のボルト6を外して、油圧シリンダ5のシリンダロッド5aと一体に連結部材4と加圧ピン3を金型本体1の外側に露出するまで引っ張り出し、油圧シリンダ連結部材4b、連結リング部材4cの周面に形成した面座(不図示)にスパナ等を当てて回すことによってシリンダロッド5aとの連結状態を容易に解除することができ、更に、加圧ピン連結部材4aの端面の角穴4fにレンチ等を入れて回すことによって、加圧ピン3との連結状態を容易に解除することができる。
〈実施形態2〉
本実施形態では、図3に示すように、金型本体としての固定金型10と移動金型11を有する鍛造金型において、固定金型10に嵌め込まれているキャビティ型12の両側に形成された各ガイド孔12aには上記した加圧ピン3が水平方向に摺動自在に挿通されており、加圧ピン3の先端側をキャビティ13の内部に入れて、キャビティ13の内部に充填された溶湯14の一部(両側の縁部)を加圧するように構成されている。
When the connecting member 4 is removed by releasing the connection state between the pressure pin 3 and the cylinder rod 5a of the hydraulic cylinder 5, the bolt 6 of the hydraulic cylinder 5 is removed and the cylinder rod 5a of the hydraulic cylinder 5 is removed. The connecting member 4 and the pressure pin 3 are pulled together until they are exposed to the outside of the mold body 1, and a spanner or the like is attached to a seat (not shown) formed on the peripheral surface of the hydraulic cylinder connecting member 4b and the connecting ring member 4c. The connection state with the cylinder rod 5a can be easily released by rotating the contact with the pressure pin 3, and further by inserting a wrench or the like into the square hole 4f on the end face of the pressure pin connection member 4a and turning it. Can be easily released.
<Embodiment 2>
In this embodiment, as shown in FIG. 3, a forging die having a fixed die 10 as a die body and a moving die 11 is formed on both sides of a cavity die 12 fitted in the fixed die 10. Further, the pressure pin 3 is slidably inserted in each guide hole 12a in the horizontal direction, and the tip end side of the pressure pin 3 is inserted into the cavity 13 so as to be filled in the cavity 13. It is comprised so that a part (edge part of both sides) of the molten metal 14 may be pressurized.

加圧ピン3の後端側(図の右側)には、図1、図2に示した実施形態1と同様に、連結部材4を介して油圧シリンダ5が連結されている。連結部材4の構成は上記した実施形態1と同様であり、本実施形態では重複する説明は省略する。なお、図3に示した本実施形態の鍛造金型では、固定金型10と移動金型11の型開き方向は矢印A1、A2(図の上下方向)であり、加圧ピン3の摺動方向(図の左右方向)に対して垂直である。   A hydraulic cylinder 5 is connected to the rear end side (right side in the drawing) of the pressurizing pin 3 through a connecting member 4 as in the first embodiment shown in FIGS. The configuration of the connecting member 4 is the same as that of the first embodiment described above, and a duplicate description is omitted in this embodiment. In the forging die of this embodiment shown in FIG. 3, the opening directions of the fixed die 10 and the moving die 11 are arrows A1 and A2 (vertical direction in the drawing), and the sliding of the pressure pin 3 is performed. It is perpendicular to the direction (left-right direction in the figure).

このように、加圧ピン3の摺動方向が、鋳造金型(固定金型10と移動金型11)の型開き方向に対して垂直であっても、実施形態1で述べたように、連結部材4によって加圧ピン3の後端側を該加圧ピン3の軸線方向に垂直な面に対して微小に移動可能に連結しているので、加圧ピン3の軸線方向に対して垂直に作用する力を吸収して、加圧ピン3にたわみが生じることが防止されることにより、加圧ピン3を確実に摺動させることができ、加圧ピン3の配設自由度を高めることができる。 Thus, even if the sliding direction of the pressure pin 3 is perpendicular to the mold opening direction of the casting mold (the fixed mold 10 and the movable mold 11), as described in the first embodiment, Since the rear end side of the pressure pin 3 is connected to the surface perpendicular to the axial direction of the pressure pin 3 by the connecting member 4, the connection member 4 is perpendicular to the axial direction of the pressure pin 3. By absorbing the force acting on the pressure pin and preventing the pressure pin 3 from being bent, the pressure pin 3 can be slid reliably, and the degree of freedom in disposing the pressure pin 3 is increased. be able to.

よって、図3に示すような、型開き方向に垂直に摺動する加圧ピン3を備えた鋳造金型を製造することができるので、溶湯(薄物ワーク)の縁を良好に部分加圧することが可能となり、得られる鍛造品の内部品質を高めることができる。   Therefore, as shown in FIG. 3, a casting mold having a pressure pin 3 that slides perpendicularly to the mold opening direction can be manufactured. Therefore, the edge of the molten metal (thin workpiece) can be partially partially pressurized well. And the internal quality of the resulting forged product can be improved.

本発明の実施形態1に係る鍛造金型を示す概略断面。The schematic cross section which shows the forge metal mold | die which concerns on Embodiment 1 of this invention. 図2(a)は、本発明の実施形態1における連結部材を介して加圧ピンがシリンダロッドに連結されている状態を示す概略断面図、図2(b)は、油圧シリンダの駆動により本発明の実施形態1における連結部材を介して加圧ピンを移動させた状態を示す概略断面図、図2(c)は、キャビティに熱膨張が生じたときの本発明の実施形態1における連結部材の加圧ピン連結部材が微動した状態を示す概略断面図。FIG. 2A is a schematic cross-sectional view showing a state in which the pressure pin is connected to the cylinder rod via the connecting member in Embodiment 1 of the present invention, and FIG. FIG. 2C is a schematic cross-sectional view showing a state in which the pressure pin is moved through the connecting member in the first embodiment of the invention, and FIG. 2C is a connecting member in the first embodiment of the present invention when thermal expansion occurs in the cavity. The schematic sectional drawing which shows the state which moved the pressure pin connection member of. 本発明の実施形態2に係る鍛造金型を示す概略断面。The schematic cross section which shows the forge metal mold | die which concerns on Embodiment 2 of this invention. 従来例における加圧ピンの連結構造を示す概略断面。The schematic cross section which shows the connection structure of the pressure pin in a prior art example.

符号の説明Explanation of symbols

1 金型本体
2 キャビティ型
3 加圧ピン
4 連結部材(連結手段)
4a 加圧ピン連結部材
4b 油圧シリンダ連結部材
4c 連結リング部材
4d 軸部
5 油圧シリンダ(加圧ピン移動手段)
5a シリンダロッド(加圧ピン移動手段)

DESCRIPTION OF SYMBOLS 1 Mold body 2 Cavity mold 3 Pressure pin 4 Connection member (connection means)
4a Pressure pin connecting member 4b Hydraulic cylinder connecting member 4c Connecting ring member 4d Shaft part 5 Hydraulic cylinder (Pressure pin moving means)
5a Cylinder rod (pressure pin moving means)

Claims (2)

金型本体に嵌め込まれているキャビティ型に形成されたガイド孔に摺動自在に挿通され、先端側をキャビティの内部に入れて前記キャビティの内部に充填された溶湯の一部又は全部を加圧する加圧ピンと、前記加圧ピンを移動させて前記キャビティ内に出し入れさせる加圧ピン移動手段とを備えた鋳造金型であって、
前記金型本体内にて前記加圧ピンの後端側と前記加圧ピン移動手段との間を連結手段を介して連結し、前記連結手段は、前記加圧ピンの後端側を該加圧ピンの軸線方向に垂直な面に沿って移動可能に連結した、
ことを特徴とする鋳造金型。
The guide hole formed in the cavity mold fitted in the mold body is slidably inserted, and the tip end side is inserted into the cavity to press a part or all of the molten metal filled in the cavity. A casting mold comprising a pressure pin and a pressure pin moving means for moving the pressure pin to move in and out of the cavity;
In the mold body, the rear end side of the pressure pin and the pressure pin moving means are connected via a connection means, and the connection means adds the rear end side of the pressure pin to the additional side. It is connected so as to be movable along a plane perpendicular to the axial direction of the pressure pin.
A casting mold characterized by that.
前記加圧ピンの摺動方向が、前記鋳造金型の型開き方向に対して垂直である、
ことを特徴とする請求項1に記載の鋳造金型。

The sliding direction of the pressure pin is perpendicular to the mold opening direction of the casting mold,
The casting mold according to claim 1, wherein:

JP2004214176A 2004-07-22 2004-07-22 Casting mold Expired - Fee Related JP4516369B2 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106661U (en) * 1982-12-28 1984-07-18 本田技研工業株式会社 Mold for molten metal forging
JPS6415650U (en) * 1987-07-15 1989-01-26
JPH071102A (en) * 1993-06-22 1995-01-06 Honda Motor Co Ltd Injection forming method
JPH08155622A (en) * 1994-12-05 1996-06-18 Toshiba Mach Co Ltd Local pressure device
JPH10272549A (en) * 1997-03-31 1998-10-13 Toyota Motor Corp Die for casting cast iron product
JP2004154806A (en) * 2002-11-05 2004-06-03 Araco Corp Die casting apparatus
JP2004195540A (en) * 2002-12-20 2004-07-15 Toyota Motor Corp Metal mold

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106661U (en) * 1982-12-28 1984-07-18 本田技研工業株式会社 Mold for molten metal forging
JPS6415650U (en) * 1987-07-15 1989-01-26
JPH071102A (en) * 1993-06-22 1995-01-06 Honda Motor Co Ltd Injection forming method
JPH08155622A (en) * 1994-12-05 1996-06-18 Toshiba Mach Co Ltd Local pressure device
JPH10272549A (en) * 1997-03-31 1998-10-13 Toyota Motor Corp Die for casting cast iron product
JP2004154806A (en) * 2002-11-05 2004-06-03 Araco Corp Die casting apparatus
JP2004195540A (en) * 2002-12-20 2004-07-15 Toyota Motor Corp Metal mold

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