JP5401914B2 - Press machine - Google Patents

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JP5401914B2
JP5401914B2 JP2008273115A JP2008273115A JP5401914B2 JP 5401914 B2 JP5401914 B2 JP 5401914B2 JP 2008273115 A JP2008273115 A JP 2008273115A JP 2008273115 A JP2008273115 A JP 2008273115A JP 5401914 B2 JP5401914 B2 JP 5401914B2
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horizontal frame
frame portion
press
fulcrum
advance
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JP2010099695A (en
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正行 長江
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Murata Machinery Ltd
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Murata Machinery Ltd
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Description

この発明は、パンチプレス等のプレス機械に関し、特にラムを昇降させるプレスドライブ機構に関する。   The present invention relates to a press machine such as a punch press, and more particularly to a press drive mechanism that raises and lowers a ram.

従来、パンチプレスのプレスドライブ機構として、トグル機構を用いたものが多く採用されている（例えば特許文献１）。パンチプレス以外のプレス機械では、ベルクランクを用いたプレスドライブ機構も採用されている（例えば特許文献２）。
特許第３４６７８６８号公報 特開昭５０−１０５５３２号公報 Conventionally, as a press drive mechanism of a punch press, a mechanism using a toggle mechanism is often employed (for example, Patent Document 1). In press machines other than the punch press, a press drive mechanism using a bell crank is also employed (for example, Patent Document 2).
Japanese Patent No. 3467868 JP 50-105532 A

例えば、図８に示すフレーム構成のパンチプレスのプレスドライブ機構８に、特許文献２のベルクランク（同文献の「第１回転部材２６」）を適用した場合、図９に示す試案のようになる。すなわち、プレスフレーム１の上方水平フレーム部１ｂにベルクランク形のクランク部材２１を支点Ａ回りに回動自在に設け、このクランク部材２１の力点Ｂに水平方向に進退する進退部材２５を連結し、かつ作用点Ｃに昇降部材２７の上端を連結し、この昇降部材２７の下端にラム７を連結する。この構成では、クランク部材２１の上部に力点Ｂが位置し、進退部材２５を進退させる駆動部（進退駆動機構）８ｂが上方水平フレーム１ｂの上部に配置されるため、機体の重心が高くなる。重心が高いと、機械振動の原因となり易い。なお、駆動部８ｂを上方水平フレーム１ｂの上部に配置する理由は、進退部材２５と昇降部材２７とが垂直に近いほど、進退部材２５から昇降部材２７への力伝達の効率が良いため、進退部材２５をほぼ水平に配置する必要があるからである。   For example, when the bell crank of Patent Document 2 ("first rotating member 26" of the same document) is applied to the press drive mechanism 8 of the punch press having the frame configuration shown in FIG. 8, the tentative plan shown in FIG. 9 is obtained. . That is, a bell crank-shaped crank member 21 is provided on the upper horizontal frame portion 1b of the press frame 1 so as to be rotatable around a fulcrum A, and a forward / backward member 25 that advances and retreats in the horizontal direction is connected to a force point B of the crank member 21; In addition, the upper end of the elevating member 27 is connected to the action point C, and the ram 7 is connected to the lower end of the elevating member 27. In this configuration, the force point B is located above the crank member 21, and the drive part (advance / retreat drive mechanism) 8b for advancing / retreating the advancing / retreating member 25 is disposed above the upper horizontal frame 1b. A high center of gravity tends to cause mechanical vibration. The reason why the drive unit 8b is arranged at the upper part of the upper horizontal frame 1b is that the force transmission efficiency from the advance / retreat member 25 to the elevating member 27 is better as the advance / retreat member 25 and the elevating member 27 are closer to vertical. This is because the member 25 needs to be arranged almost horizontally.

この発明の目的は、ベルクランク方式のプレスドライブ機構を搭載し、機体の重心が低く抑えられたプレス機械を提供することである。
この発明の他の目的は、上方水平フレーム部が片持ち状であるＣ形のプレスフレームである場合に、クランク部材の取付けが容易で、かつ作業性を損なわないことである。
この発明のさらに他の目的は、ラムの落下防止用の装置を別に設けずに、上昇端停止時のラムの落下を防止できる構成とすることである。 An object of the present invention is to provide a press machine equipped with a bell crank type press drive mechanism and having a low center of gravity of the airframe.
Another object of the present invention is to easily attach the crank member and not to impair workability when the upper horizontal frame portion is a C-shaped press frame having a cantilever shape.
Still another object of the present invention is to provide a configuration that can prevent the ram from dropping when the rising end is stopped without providing a separate device for preventing the ram from dropping.

この発明のプレス機械は、プレスドライブ機構を搭載するプレスフレームを有する。前記プレスフレームは、床に沿って水平方向に延びる下方水平フレーム部と、この下方水平フレーム部の上方にあり、下方水平フレーム部と同方向に延びる上方水平フレーム部と、これら下方水平フレーム部および上方水平フレーム部の少なくとも一端同士を上下に連結する柱部とでなる。前記プレスドライブ機構は、前記上方水平フレーム部に搭載され、このプレスドライブ機構は、水平な回動軸心である支点回りで前記上方水平フレーム部に回動自在に支持され、かつそれぞれ水平な回動軸心である力点および作用点を有するクランク部材と、進退駆動機構により水平方向に進退し、前記力点と回動自在に連結された進退部材と、前記作用点に一端が連結され他端がラムに連結された昇降部材とを有する。前記クランク部材は、このクランク部材の回動範囲内における任意の回動姿勢において、前記支点に対し前記作用点が水平方向に離れて位置し、かつ前記支点に対し前記力点が垂直方向に離れて位置する。前記進退部材は、前記支点よりも下方に配置される。   The press machine of the present invention has a press frame on which a press drive mechanism is mounted. The press frame includes a lower horizontal frame portion that extends horizontally along the floor, an upper horizontal frame portion that is above the lower horizontal frame portion and extends in the same direction as the lower horizontal frame portion, the lower horizontal frame portion, and It consists of a column part which connects at least one end of an upper horizontal frame part up and down. The press drive mechanism is mounted on the upper horizontal frame portion, and the press drive mechanism is rotatably supported by the upper horizontal frame portion around a fulcrum that is a horizontal rotation axis, and is rotated horizontally. A crank member having a force point and an action point which is a dynamic axis; a forward / backward member which is advanced and retracted in a horizontal direction by an advance / retreat drive mechanism; and is rotatably connected to the force point; A lifting member coupled to the ram. When the crank member is in an arbitrary rotation posture within the rotation range of the crank member, the action point is located in the horizontal direction with respect to the fulcrum, and the force point is separated in the vertical direction with respect to the fulcrum. To position. The advance / retreat member is disposed below the fulcrum.

この発明の構成によれば、進退駆動機構により進退部材を水平方向に進退させると、支点回りにクランク部材が回動し、さらに昇降部材がラムと一体に昇降する。クランク部材は、支点に対し作用点が水平方向に離れて配置され、かつ支点に対し力点が垂直方向に離れて配置され、また進退部材が支点よりも下方に配置されているため、進退部材および進退駆動機構を下方水平フレーム部の低い位置に設置することができ、機体の重心を低くできる。
上記構成において、前記昇降部材と前記進退部材とが側面視で交差し、前記進退部材が前記クランク部材側へ前進して前記昇降部材が下降するようにしても良い。その場合、製造コストを低減できる。 According to the configuration of the present invention, when the advance / retreat member is advanced or retracted in the horizontal direction by the advance / retreat drive mechanism, the crank member rotates around the fulcrum, and the elevating member moves up and down integrally with the ram. The crank member is arranged such that the action point is disposed in the horizontal direction with respect to the fulcrum, the force point is disposed in the vertical direction with respect to the fulcrum, and the advance / retreat member is disposed below the fulcrum. the advancing drive mechanism can be installed at a lower position of the lower horizontal frame portion, Ru can be lowered center of gravity of the aircraft.
The said structure WHEREIN: The said raising / lowering member and the said advance / retreat member may cross | intersect by side view, and the said advance / retreat member may advance to the said crank member side, and you may make it the said raising / lowering member fall. In that case, the manufacturing cost can be reduced.

前記プレスフレームは、前記上方水平フレーム部の前記柱部と反対側の先端が前記下方水平フレーム部と連結されずに離れた形状であり、前記クランク部材の前記支点は、前記作用点よりも先端側かつ前記力点よりも上方に位置し、前記昇降部材と前記進退部材は側面視で交差するのがよい。   The press frame has a shape in which a tip of the upper horizontal frame portion opposite to the pillar portion is separated from the lower horizontal frame portion without being connected to the lower horizontal frame portion, and the fulcrum of the crank member is tip of the action point. It is preferable that the elevating member and the advancing / retreating member intersect each other in a side view.

この構成であると、クランク部材の支点を上方水平フレーム部の先端に近い位置に設けることができ、クランク部材の取付けが容易である。また、昇降部材と進退部材を側面視で交差させることにより、クランク部材の力点を上方水平フレーム部の先端に近い位置に設けることができる。それにより、加工位置を作業者の立ち位置に近づけることができ、作業性が良好である。   With this configuration, the fulcrum of the crank member can be provided at a position close to the tip of the upper horizontal frame portion, and the crank member can be easily attached. Moreover, the power point of a crank member can be provided in the position close | similar to the front-end | tip of an upper horizontal frame part by making a raising / lowering member and an advance / retreat member cross | intersect by side view. Thereby, the processing position can be brought close to the worker's standing position, and the workability is good.

前記進退駆動機構は、前記進退部材の前記力点との連結端と反対側端に連結された偏心部材と、この偏心部材を回転駆動するサーボモータとを有し、前記昇降部材が上死点にあるときの前記偏心部材の位相を、ラムの重力によって前記進退部材に作用する力で回動しない位相とするのがよい。   The advance / retreat drive mechanism includes an eccentric member connected to an end opposite to the connection end of the advance / retreat member with the force point, and a servo motor that rotationally drives the eccentric member. The phase of the eccentric member at a certain time may be a phase that does not rotate due to the force acting on the advance / retreat member due to the gravity of the ram.

偏心部材の回転駆動源がサーボモータであるので、偏心部材を任意の位相で停止させることができる。そして、昇降部材が上死点にあるときに偏心部材を停止させることにより、ラムの重力によって進退部材に作用する力で偏心部材が回動しない状態となる。これにより、ラムの落下防止用の装置を別に設けずに、加工停止時のラムの落下を防止できる。   Since the rotational drive source of the eccentric member is a servo motor, the eccentric member can be stopped at an arbitrary phase. Then, by stopping the eccentric member when the elevating member is at the top dead center, the eccentric member is not rotated by the force acting on the advance / retreat member due to the gravity of the ram. Accordingly, the ram can be prevented from dropping when machining is stopped without providing a separate device for preventing the ram from dropping.

この発明のプレス機械は、プレスドライブ機構を搭載するプレスフレームを有するプレス機械であって、前記プレスフレームは、床に沿って水平方向に延びる下方水平フレーム部と、この下方水平フレーム部の上方にあり、下方水平フレーム部と同方向に延びる上方水平フレーム部と、これら下方水平フレーム部および上方水平フレーム部の少なくとも一端同士を上下に連結する柱部とでなり、前記プレスドライブ機構は、前記上方水平フレーム部に搭載され、このプレスドライブ機構は、水平な回動軸心である支点回りで前記上方水平フレーム部に回動自在に支持され、かつそれぞれ水平な回動軸心である力点および作用点を有するクランク部材と、進退駆動機構により水平方向に進退し、前記力点と回動自在に連結された進退部材と、前記作用点に一端が連結され他端がラムに連結された昇降部材とを有し、前記クランク部材は、このクランク部材の回動範囲内における任意の回動姿勢において、前記支点に対し前記作用点が水平方向に離れて位置し、かつ前記支点に対し前記力点が垂直方向に離れて位置し、前記進退部材は、前記支点よりも下方に配置されているため、機体の重心を低く抑えつつ、ベルクランク方式のプレスドライブ機構を搭載できる。
前記昇降部材と前記進退部材とが側面視で交差し、前記進退部材が前記クランク部材側へ前進して前記昇降部材が下降するようにした場合は、製造コストを低減できる。 The press machine according to the present invention is a press machine having a press frame on which a press drive mechanism is mounted. The press frame extends in a horizontal direction along the floor, and above the lower horizontal frame part. And an upper horizontal frame portion extending in the same direction as the lower horizontal frame portion, and a pillar portion that vertically connects at least one end of the lower horizontal frame portion and the upper horizontal frame portion. The press drive mechanism mounted on the horizontal frame portion is supported by the upper horizontal frame portion so as to be rotatable about a fulcrum that is a horizontal rotation axis, and each has a force point and an action that are horizontal rotation axes. A crank member having a point, an advancing / retreating member that is advanced / retracted horizontally by an advancing / retracting drive mechanism and is pivotally connected to the power point; And an elevating member having one end connected to the action point and the other end connected to the ram, and the crank member has the action point with respect to the fulcrum in an arbitrary rotation posture within the rotation range of the crank member. Is located in the horizontal direction, and the force point is positioned in the vertical direction with respect to the fulcrum, and the advancing and retracting member is disposed below the fulcrum, so that the center of gravity of the aircraft is kept low, Ru can be equipped with a press drive mechanism of the bell crank system.
When the elevating member and the advancing / retreating member intersect in a side view and the advancing / retreating member moves forward to the crank member side and the elevating member descends, the manufacturing cost can be reduced.

この発明において、前記プレスフレームは、前記上方水平フレーム部の前記柱部と反対側の先端が前記下方水平フレーム部と連結されずに離れた形状であり、前記クランク部材の前記支点は、前記作用点よりも先端側かつ前記力点よりも上方に位置し、前記昇降部材と前記進退部材は側面視で交差するものとした場合は、上方水平フレーム部が片持ち状である、いわゆるＣ形フレームのプレス機械へのクランク部材の取付けが容易で、かつ作業性を損なわない   In this invention, the press frame has a shape in which a tip of the upper horizontal frame portion opposite to the pillar portion is separated from the lower horizontal frame portion without being connected to the lower horizontal frame portion, and the fulcrum of the crank member When the elevating member and the advancing / retreating member intersect with each other in a side view when located on the tip side of the point and above the force point, a so-called C-shaped frame in which the upper horizontal frame part is cantilevered. Easy installation of the crank member to the press machine and no loss of workability

さらに、前記進退駆動機構は、前記進退部材の前記力点との連結端と反対側端に連結された偏心部材と、この偏心部材を回転駆動するサーボモータとを有し、前記昇降部材が上死点にあるときの前記偏心部材の位相を、ラムの重力によって前記進退部材に作用する力で回動しない位相とした場合は、ラムの落下防止用の装置を別に設けずに、上昇端停止時のラムの落下を防止できる。   The advance / retreat drive mechanism further includes an eccentric member connected to an end opposite to the connection end of the advance / retreat member with the force point, and a servo motor that rotationally drives the eccentric member, and the elevating member is dead. When the phase of the eccentric member at the point is a phase that does not rotate due to the force acting on the advance / retreat member due to the gravity of the ram, a separate device for preventing the ram from falling is not provided, and the rising end is stopped. Can prevent the ram from falling.

この発明の実施形態を図面と共に説明する。この実施形態のプレス機械はパンチプレスであり、図１はその概略構成を示す平面図、図２はその側面図である。このパンチプレスは、側面視Ｃ形のプレスフレーム１を備える。詳しくは、プレスフレーム１は、床に沿って水平方向に延びる下方水平フレーム部１ａと、この下方水平フレーム部１ａの上方にあり、下方水平フレーム部１ａと同方向に延びる上方水平フレーム部１ｂと、これら下方水平フレーム部１ａおよび上方水平フレーム部１ｂの一端同士を上下に連結する柱部１ｃとでなる。上方水平フレーム部１ｂは片持ち状で、その先端より前方は作業者が後記プレスドライブ機構８をプレスフレーム１に取付ける作業をするための作業スペースになっている。なお、プレスフレーム１は、上方水平フレーム部１ｂの先端が垂直フレーム部（図示せず）を介して下方水平フレーム部１ａと連結されたロ字形であってもよい。   An embodiment of the present invention will be described with reference to the drawings. The press machine of this embodiment is a punch press, FIG. 1 is a plan view showing a schematic configuration thereof, and FIG. 2 is a side view thereof. This punch press includes a press frame 1 having a C-shape in a side view. Specifically, the press frame 1 includes a lower horizontal frame portion 1a that extends horizontally along the floor, and an upper horizontal frame portion 1b that is above the lower horizontal frame portion 1a and extends in the same direction as the lower horizontal frame portion 1a. The lower horizontal frame portion 1a and the upper horizontal frame portion 1b are composed of a column portion 1c that vertically connects one end of the lower horizontal frame portion 1a. The upper horizontal frame portion 1b is cantilevered, and the front side of the tip is a work space for an operator to attach the press drive mechanism 8 to the press frame 1 described later. The press frame 1 may have a square shape in which the tip of the upper horizontal frame portion 1b is connected to the lower horizontal frame portion 1a via a vertical frame portion (not shown).

プレスフレーム１における上方水平フレーム部１ｂおよび下方水平フレーム部１ａに、上側および下側の工具支持体である上下のタレット２，３が、互いに同心の垂直軸回りに回転自在に支持されている。これらタレット２，３には、それぞれ複数のパンチ工具４およびダイ工具５が円周方向に並べて設置されている。上下のタレット２，３は、図示しないモータにより、互いに同期回転させて、加工位置Ｐに割り出される。   Upper and lower turrets 2 and 3 which are upper and lower tool supports are supported on the upper horizontal frame portion 1b and the lower horizontal frame portion 1a of the press frame 1 so as to be rotatable around concentric vertical axes. On these turrets 2 and 3, a plurality of punch tools 4 and die tools 5 are arranged side by side in the circumferential direction. The upper and lower turrets 2 and 3 are synchronously rotated with each other by a motor (not shown) and are indexed to the machining position P.

パンチ工具４は、加工位置Ｐに割り出された状態で、ラム７により昇降駆動される。ラム７は、上方水平フレーム部１ｂに搭載されたプレスドライブ機構８により昇降駆動される。プレスドライブ機構８については、後で説明する。   The punch tool 4 is driven up and down by the ram 7 while being indexed to the processing position P. The ram 7 is driven up and down by a press drive mechanism 8 mounted on the upper horizontal frame portion 1b. The press drive mechanism 8 will be described later.

板材Ｗは、加工箇所がパンチ位置Ｐにくるように、板材送り手段１３によりテーブル１４上を前後左右に送られる。板材送り手段１３は、前後（Ｙ方向）移動するキャリッジ１５に、左右（Ｘ方向）移動するクロススライド１６を設置し、板材Ｗの端部を把持するワークホルダ１７をクロススライド１６に取付けたものとしてある。キャリッジ１５を前後方向に移動させる前後移動機構１８、およびクロススライド１６を左右方向に移動させる左右移動機構１９は、例えばサーボモータ１８ａ，１９ａとその回転を直線動作に変換するボールねじ等の変換機構１８ｂ，１９ｂ等からなる。   The plate material W is fed back and forth and right and left on the table 14 by the plate material feeding means 13 so that the processing position is at the punch position P. The plate material feeding means 13 includes a carriage 15 that moves back and forth (Y direction) and a cross slide 16 that moves left and right (X direction), and a work holder 17 that holds an end of the plate material W is attached to the cross slide 16. It is as. A forward / backward moving mechanism 18 for moving the carriage 15 in the front / rear direction and a left / right moving mechanism 19 for moving the cross slide 16 in the left / right direction include, for example, a servo motor 18a, 19a and a conversion mechanism such as a ball screw for converting the rotation thereof into a linear motion. 18b, 19b, etc.

図３〜図５に示すように、プレスドライブ機構８は、上方水平フレーム部１ｂ内の前部に位置するベルクランク部８ａと、後部に位置する駆動部８ｂとでなる。
ベルクランク部８ａは、左右方向に沿う支点Ａ回りに回動自在なクランク部材２１を有する。このクランク部材２１は側面視略三角形で、各頂点の近傍がそれぞれ支点Ａ、力点Ｂ、および作用点Ｃになっている。支点Ａには支点軸２２が一体に設けられ、この支点軸２２が、上方水平フレーム部１ｂに設置された軸受部材２３に回転自在に嵌合している。力点Ｂには、力点連結ピン２４により、前後方向に延びる進退部材２５の前端が連結されている。また、作用点Ｃには、作用点連結ピン２６により、垂直方向に延びる昇降部材２７の上端が連結されている。昇降部材２７の下端には、ラム連結ピン２８によりラム７が連結されている。 As shown in FIGS. 3 to 5, the press drive mechanism 8 includes a bell crank portion 8 a located at the front portion in the upper horizontal frame portion 1 b and a drive portion 8 b located at the rear portion.
The bell crank portion 8a has a crank member 21 that is rotatable around a fulcrum A along the left-right direction. The crank member 21 is substantially triangular in a side view, and the vicinity of each vertex is a fulcrum A, a force point B, and an action point C, respectively. A fulcrum shaft 22 is provided integrally with the fulcrum A, and this fulcrum shaft 22 is rotatably fitted to a bearing member 23 installed on the upper horizontal frame portion 1b. A front end of an advancing / retracting member 25 extending in the front-rear direction is connected to the force point B by a force point connecting pin 24. The upper end of the elevating member 27 extending in the vertical direction is connected to the action point C by the action point connecting pin 26. The ram 7 is connected to the lower end of the elevating member 27 by a ram connecting pin 28.

クランク部材２１は、図３（Ａ）の位置と図３（Ｂ）の位置の範囲内で回動するが、クランク部材２１の回動範囲内における任意の回動姿勢において、次の各関係が成り立つように、支点Ａ、力点Ｂ、および作用点Ｃが配置されている。
（１）支点Ａに対し作用点Ｃが水平方向に離れて位置する。
（２）支点Ａに対し力点Ｂが垂直方向に離れて位置する。
（３）進退部材２５は、支点Ａよりも下方に位置する。 The crank member 21 rotates within the range of the position shown in FIG. 3A and the position shown in FIG. 3B. A fulcrum A, a force point B, and an action point C are arranged so as to hold.
(1) The action point C is located away from the fulcrum A in the horizontal direction.
(2) The force point B is located away from the fulcrum A in the vertical direction.
(3) The advance / retreat member 25 is located below the fulcrum A.

この実施形態では、支点Ａは、作用点Ｃよりも上方水平フレーム部１ｂの先端側、かつ力点Ｂよりも上方に位置する。また、昇降部材２７と進退部材２５は側面視で交差している。進退部材２５が最も前進した状態（図３（Ｂ））でも、作用点連結ピン２４が支点軸２２よりも前方に出ないようになっている。   In this embodiment, the fulcrum A is located on the tip side of the upper horizontal frame portion 1 b from the action point C and above the force point B. Further, the elevating member 27 and the advancing / retreating member 25 intersect each other in a side view. Even in the state where the advance / retreat member 25 is most advanced (FIG. 3B), the action point connecting pin 24 does not protrude forward from the fulcrum shaft 22.

図５に示すように、昇降部材２７は前後に連通する開口２７ａを有し、この開口２７ａに進退部材２５が挿通させたことで、支点Ａ、力点Ｂ、および作用点Ｃを同一平面上に位置させつつ、昇降部材２７と進退部材２５とを交差させることを実現している。進退部材２５は、材質が異なる複数の部位を組み合わせて構成することができる。例えば、クランク部材２１の力点Ｂに連結される前部２５ａ、および後記偏心部材３１に連結される後部２５ｂの材質は金属とし、中間部２５の材質は炭素繊維とする。   As shown in FIG. 5, the elevating member 27 has an opening 27a communicating in the front-rear direction, and the advancing / retreating member 25 is inserted into the opening 27a, so that the fulcrum A, the force point B, and the action point C are on the same plane. It is realized that the elevating member 27 and the advancing / retreating member 25 intersect each other while being positioned. The advance / retreat member 25 can be configured by combining a plurality of parts made of different materials. For example, the material of the front part 25a connected to the force point B of the crank member 21 and the rear part 25b connected to the eccentric member 31 described later is metal, and the material of the intermediate part 25 is carbon fiber.

駆動部８ｂは、進退部材２５を進退させる進退駆動機構として構成されている。駆動部８ｂは、左右方向に沿う回転軸心Ｏ回りに回転する円板状の偏心部材３１を有し、この偏心部材３１の偏心位置に設けた偏心連結ピン３２に進退部材２５の後端を連結してある。偏心部材３１は、サーボモータ３３の回転が減速機３４により減速して伝達されて、回転駆動させられる。駆動部８ｂは、ブラケット３５により、上方水平フレーム部１ｂの左右の側板１ｂａ間に設けた垂直な板である取付板３６に取付けられている。   The drive unit 8b is configured as an advance / retreat drive mechanism for moving the advance / retreat member 25 forward and backward. The drive unit 8b has a disc-shaped eccentric member 31 that rotates about the rotation axis O along the left-right direction, and the rear end of the advance / retreat member 25 is attached to the eccentric connection pin 32 provided at the eccentric position of the eccentric member 31. It is connected. The eccentric member 31 is driven to rotate by the rotation of the servo motor 33 being reduced by the speed reducer 34 and transmitted. The drive portion 8b is attached to a mounting plate 36, which is a vertical plate provided between the left and right side plates 1ba of the upper horizontal frame portion 1b by a bracket 35.

上記構成の動作を説明する。サーボモータ３３で偏心部材３１を１回転させると、進退部材２５が１往復の進退動作をする。この進退部材２５の進退動作により、クランク部材２１が揺動させられ、それにより昇降部材２７は昇降し、ラム７がパンチ工具４に対するパンチ動作と復帰動作とを行う。昇降部材２７の上死点は、偏心連結ピン３２が回転中心Ｏに対しベルクランク部８ａと反対側にある図３（Ａ）の位置であり、下死点は、偏心連結ピン３２が回転中心Ｏに対しベルクランク部８ａ側にある図３（Ｂ）の位置である。よって、進退部材２５が前進するときに昇降部材２７が下降し、進退部材２５が後退するときに昇降部材２７が上昇する。この実施形態の場合、昇降部材２７が上死点と下死点の中間に位置するとき、昇降部材２７と進退部材２５とが直交するようになっている。   The operation of the above configuration will be described. When the eccentric member 31 is rotated once by the servo motor 33, the advance / retreat member 25 performs one reciprocation operation. By the advance / retreat operation of the advance / retreat member 25, the crank member 21 is swung, whereby the elevating member 27 is raised / lowered, and the ram 7 performs the punching operation and the returning operation with respect to the punch tool 4. The top dead center of the elevating member 27 is the position of FIG. 3A where the eccentric coupling pin 32 is on the opposite side of the bell crank portion 8a with respect to the rotation center O, and the bottom dead center is the rotation center of the eccentric coupling pin 32. It is the position of FIG. 3 (B) in the bell crank part 8a side with respect to O. Therefore, when the advance / retreat member 25 moves forward, the elevating member 27 is lowered, and when the advance / retreat member 25 is retracted, the elevating member 27 is raised. In the case of this embodiment, when the elevating member 27 is positioned between the top dead center and the bottom dead center, the elevating member 27 and the advance / retreat member 25 are orthogonal to each other.

このように、進退部材２５が前進するとき昇降部材２７が下降するので、ラム７のパンチ動作時に進退部材２５には圧縮力が作用する。そのため、前記のように進退部材２５が材質の異なる複数の部位２５ａ，２５ｂ，２５ｃを接合して構成されていても、各部位の接合部で分離が生じにくい。逆に、ラム７のパンチ動作時に進退部材２５には引っ張り力が作用する場合には、各部位の接合部で分離が生じやすい。上記理由から、進退部材２５の一部を炭素繊維等で構成することが可能で、製造コストを低減できる。   Thus, when the advance / retreat member 25 moves forward, the elevating / lowering member 27 descends, so that a compression force acts on the advance / retreat member 25 during the punching operation of the ram 7. Therefore, even if the advancing / retreating member 25 is configured by joining a plurality of parts 25a, 25b, and 25c made of different materials as described above, separation is unlikely to occur at the joints of the parts. On the contrary, when a pulling force is applied to the advancing / retreating member 25 during the punching operation of the ram 7, separation is likely to occur at the joint portion of each part. For the above reasons, a part of the advance / retreat member 25 can be made of carbon fiber or the like, and the manufacturing cost can be reduced.

ラム７の上昇端停止時、昇降部材２７は図３（Ａ）の上死点で停止する。偏心部材３１の回動駆動源がサーボモータ３３であるので、昇降部材２７を上死点に正確に停止させることが可能である。昇降部材２７が上死点にある状態では、ラム７の重力によって進退部材２５に引っ張り力が作用する。しかし、このとき偏心部材３１は、偏心連結ピン３２が回転中心Ｏに対しベルクランク部８ａと反対側に位置する中立状態にあり、進退部材２５に作用する力で回動しない位相とされている。このため、ラム７の落下防止用の装置を別に設けることなく、上昇端停止時のラム７の落下を防止できる。   When the rising end of the ram 7 is stopped, the elevating member 27 stops at the top dead center of FIG. Since the rotation drive source of the eccentric member 31 is the servo motor 33, the elevating member 27 can be accurately stopped at the top dead center. In a state where the elevating member 27 is at the top dead center, a pulling force acts on the advancing / retreating member 25 due to the gravity of the ram 7. However, at this time, the eccentric member 31 is in a neutral state in which the eccentric connecting pin 32 is located on the opposite side of the bell crank portion 8a with respect to the rotation center O, and is in a phase that does not rotate due to the force acting on the advance / retreat member 25. . For this reason, it is possible to prevent the ram 7 from dropping when the rising end is stopped without providing a separate device for preventing the ram 7 from falling.

この実施形態のプレス機械は、クランク部材２１は、支点Ａに対し作用点Ｃが水平方向に離れて配置され、かつ支点Ａに対し力点Ｂが垂直方向に離れて配置され、また進退部材２５が支点Ａよりも下方に配置された構成としたことにより、進退部材２５およびその進退駆動機構である駆動部８ｂを上方水平フレーム部１ｂの比較的低い位置に設置することができる。それにより、機体の重心を低くして安定性を向上させることができる。また、機械振動が生じにくい。   In the press machine of this embodiment, the crank member 21 is arranged such that the action point C is arranged in the horizontal direction with respect to the fulcrum A, the force point B is arranged in the vertical direction with respect to the fulcrum A, and the advance / retreat member 25 is provided. With the configuration arranged below the fulcrum A, the advance / retreat member 25 and the drive unit 8b which is the advance / retreat drive mechanism can be installed at a relatively low position of the upper horizontal frame portion 1b. Thereby, the center of gravity of the airframe can be lowered and the stability can be improved. In addition, mechanical vibration is unlikely to occur.

また、クランク部材２１の支点Ａは、作用点Ｃよりも先端側かつ力点Ｂよりも上方に位置させたことにより、クランク部材２１の支点Ａを上方水平フレーム１ｂの先端に近い位置に設けることができる。それにより、クランク部材２１の取付けが容易である。さらに、昇降部材２７と進退部材２５が側面視で交差させ、進退部材２５が最も前進した状態でも作用点連結ピン２４が支点軸２２よりも前方に出ないようにしたことにより、クランク部材２１の力点Ｂを上方水平フレーム１ｂの先端に近い位置に設けることができる。それにより、加工位置Ｐを作業者の立ち位置に近づけることができ、作業性が良好である。   Further, the fulcrum A of the crank member 21 is located at the tip side of the action point C and above the force point B, so that the fulcrum A of the crank member 21 is provided at a position close to the tip of the upper horizontal frame 1b. it can. Thereby, attachment of the crank member 21 is easy. Further, the elevating member 27 and the advancing / retracting member 25 intersect each other in a side view so that the action point connecting pin 24 does not protrude forward from the fulcrum shaft 22 even when the advancing / retreating member 25 is most advanced. The force point B can be provided at a position close to the tip of the upper horizontal frame 1b. Thereby, the processing position P can be brought close to the standing position of the operator, and the workability is good.

なお、図６に示す実施形態のように、進退部材２５が最も前進した状態（同図（Ｂ））では、作用点連結ピン２４が支点軸２２よりも前方に出るように構成してもよい。同図（Ａ）は昇降部材２７が上死点にある状態、同図（Ｂ）は昇降部材２７が下死点にある状態をそれぞれ示す。   Note that, as in the embodiment shown in FIG. 6, in a state where the advance / retreat member 25 is most advanced ((B) in the same figure), the action point connecting pin 24 may be configured to protrude forward from the fulcrum shaft 22. . FIG. 4A shows a state where the lifting member 27 is at the top dead center, and FIG. 4B shows a state where the lifting member 27 is at the bottom dead center.

図７はプレス機械の参考の提案例を示す。クランク部材２１の回動範囲内における任意の回動姿勢において、クランク部材２１の支点Ａ、力点Ｂ、および作用点Ｃの配置につき前記各関係（１）（２）（３）が成り立っていれば良いだけであれば、図７に示す構成としてもよい。同図（Ａ）は昇降部材２７が上死点にある状態、同図（Ｂ）は昇降部材２７が下死点にある状態をそれぞれ示す。すなわち、この提案例は、支点Ａは、作用点Ｃよりも上方水平フレーム部１ｂの反先端側、かつ力点Ｂよりも上方に位置する。昇降部材２７と進退部材２５は側面視で交差しない。 FIG. 7 shows an example of a suggested proposal for a press machine. In any rotational orientation within the rotation range of the crank member 21, the fulcrum A of the crank member 21, the force point B, and the respective relationships per placement of the action point C (1) (2) ( 3) if the consist If only good, the configuration shown in FIG. 7 may be adopted. FIG. 4A shows a state where the lifting member 27 is at the top dead center, and FIG. 4B shows a state where the lifting member 27 is at the bottom dead center. That is, in this proposed example , the fulcrum A is located on the opposite end side of the upper horizontal frame portion 1b from the action point C and above the force point B. The elevating member 27 and the advancing / retracting member 25 do not intersect in a side view.

この場合も、前記同様、機体の重量を低くすることができる。しかし、この提案例の場合、前記各実施形態に比べ、進退部材２５の支点Ａが上方水平フレーム１ｂの先端から離れた位置に配置されるため、クランク部材２１の取付けが若干難しくなる。また、進退部材２５が後退するときに昇降部材２７が下降するため、ラム７のパンチ動作時に進退部材２５に引っ張り力が作用する。そのため、進退部材２５を材質の異なる複数の部位を接合して構成するのには適さない。 In this case as well, the weight of the airframe can be reduced as described above. However, in the case of this proposed example , the fulcrum A of the advance / retreat member 25 is arranged at a position away from the tip of the upper horizontal frame 1b as compared with the above-described embodiments, so that it is slightly difficult to attach the crank member 21. Further, since the elevating member 27 is lowered when the advance / retreat member 25 is retracted, a pulling force acts on the advance / retreat member 25 during the punching operation of the ram 7. Therefore, the advancing / retreating member 25 is not suitable for joining a plurality of parts made of different materials.

上記各実施形態はプレス機械がパンチプレスであるが、この発明は、パンチプレス以外のプレス機械、例えば一般的に成形機械等にも適用できる。   In each of the above embodiments, the press machine is a punch press. However, the present invention can also be applied to a press machine other than the punch press, for example, generally a molding machine.

この発明の実施形態にかかるプレス機械の概略構成を示す平面図である。It is a top view showing a schematic structure of a press machine concerning an embodiment of this invention. 同プレス機械の概略構成を示す側面図である。It is a side view which shows schematic structure of the press machine. （Ａ），（Ｂ）は同プレス機械のプレスドライブ機構のそれぞれ異なる状態を示す側面図である。(A), (B) is a side view which shows each different state of the press drive mechanism of the press machine. 同プレスドライブ機構の平面図である。It is a top view of the press drive mechanism. 図３（Ａ）のＶ−Ｖ断面図である。It is VV sectional drawing of FIG. 3 (A). （Ａ），（Ｂ）はこの発明の異なる実施形態にかかるプレス機械のプレスドライブ機構のそれぞれ異なる状態を示す側面図である。(A), (B) is a side view which shows each different state of the press drive mechanism of the press machine concerning different embodiment of this invention. （Ａ），（Ｂ）は提案例にかかるプレス機械のプレスドライブ機構のそれぞれ異なる状態を示す側面図である。(A), (B) is a side view which shows each different state of the press drive mechanism of the press machine concerning a proposal example . パンチプレスのフレーム構成を示す概略図である。It is the schematic which shows the flame | frame structure of a punch press. 試案のプレスドライブ機構の側面図である。It is a side view of a tentative press drive mechanism.

符号の説明Explanation of symbols

１…プレスフレーム
１ａ…下方水平フレーム部
１ｂ…上方水平フレーム部
１ｃ…柱部
７…ラム
８…プレスドライブ機構
８ａ…ベルクランク部
８ｂ…駆動部（進退駆動機構）
２１…クランク部材
２５…進退部材
２７…昇降部材
３１…偏心部材
３３…サーボモータ
Ａ…支点
Ｂ…力点
Ｃ…作用点 DESCRIPTION OF SYMBOLS 1 ... Press frame 1a ... Lower horizontal frame part 1b ... Upper horizontal frame part 1c ... Column part 7 ... Ram 8 ... Press drive mechanism 8a ... Bell crank part 8b ... Drive part (advance / retreat drive mechanism)
21 ... Crank member 25 ... Advancing / retracting member 27 ... Elevating member 31 ... Eccentric member 33 ... Servo motor A ... fulcrum B ... power point C ... operating point

Claims (3)

プレスドライブ機構を搭載するプレスフレームを有するプレス機械であって、
前記プレスフレームは、床に沿って水平方向に延びる下方水平フレーム部と、この下方水平フレーム部の上方にあり、下方水平フレーム部と同方向に延びる上方水平フレーム部と、これら下方水平フレーム部および上方水平フレーム部の少なくとも一端同士を上下に連結する柱部とでなり、
前記プレスドライブ機構は、前記上方水平フレーム部に搭載され、このプレスドライブ機構は、水平な回動軸心である支点回りで前記上方水平フレーム部に回動自在に支持され、かつそれぞれ水平な回動軸心である力点および作用点を有するクランク部材と、進退駆動機構により水平方向に進退し、前記力点と回動自在に連結された進退部材と、前記作用点に一端が連結され他端がラムに連結された昇降部材とを有し、
前記クランク部材は、このクランク部材の回動範囲内における任意の回動姿勢において、前記支点に対し前記作用点が水平方向に離れて位置し、かつ前記支点に対し前記力点が垂直方向に離れて位置し、
前記進退部材は、前記支点よりも下方に配置されていて、前記昇降部材と前記進退部材とが側面視で交差し、
前記進退部材が前記クランク部材側へ前進して前記昇降部材が下降する、
プレス機械。 A press machine having a press frame on which a press drive mechanism is mounted,
The press frame includes a lower horizontal frame portion that extends horizontally along the floor, an upper horizontal frame portion that is above the lower horizontal frame portion and extends in the same direction as the lower horizontal frame portion, the lower horizontal frame portion, and It consists of a column part that connects at least one end of the upper horizontal frame part up and down,
The press drive mechanism is mounted on the upper horizontal frame portion, and the press drive mechanism is rotatably supported by the upper horizontal frame portion around a fulcrum that is a horizontal rotation axis, and is rotated horizontally. A crank member having a force point and an action point which is a dynamic axis; a forward / backward member which is advanced and retracted in a horizontal direction by an advance / retreat drive mechanism; and is rotatably connected to the force point; A lifting member connected to the ram,
When the crank member is in an arbitrary rotation posture within the rotation range of the crank member, the action point is located in the horizontal direction with respect to the fulcrum, and the force point is separated in the vertical direction with respect to the fulcrum. Position to,
The advance / retreat member is disposed below the fulcrum , and the elevating member and the advance / retreat member intersect in a side view,
The advancing and retracting member moves forward toward the crank member and the elevating member descends;
Press machine. プレスドライブ機構を搭載するプレスフレームを有するプレス機械であって、
前記プレスフレームは、床に沿って水平方向に延びる下方水平フレーム部と、この下方水平フレーム部の上方にあり、下方水平フレーム部と同方向に延びる上方水平フレーム部と、これら下方水平フレーム部および上方水平フレーム部の少なくとも一端同士を上下に連結する柱部とでなり、
前記プレスドライブ機構は、前記上方水平フレーム部に搭載され、このプレスドライブ機構は、水平な回動軸心である支点回りで前記上方水平フレーム部に回動自在に支持され、かつそれぞれ水平な回動軸心である力点および作用点を有するクランク部材と、進退駆動機構により水平方向に進退し、前記力点と回動自在に連結された進退部材と、前記作用点に一端が連結され他端がラムに連結された昇降部材とを有し、
前記クランク部材は、このクランク部材の回動範囲内における任意の回動姿勢において、前記支点に対し前記作用点が水平方向に離れて位置し、かつ前記支点に対し前記力点が垂直方向に離れて位置し、
前記進退部材は、前記支点よりも下方に配置されており、
前記プレスフレームは、前記上方水平フレーム部の前記柱部と反対側の先端が前記下方水平フレーム部と連結されずに離れた形状であり、前記クランク部材の前記支点は、前記作用点よりも先端側かつ前記力点よりも上方に位置し、前記昇降部材と前記進退部材は側面視で交差するものとしたプレス機械。 A press machine having a press frame on which a press drive mechanism is mounted,
The press frame includes a lower horizontal frame portion that extends horizontally along the floor, an upper horizontal frame portion that is above the lower horizontal frame portion and extends in the same direction as the lower horizontal frame portion, the lower horizontal frame portion, and It consists of a column part that connects at least one end of the upper horizontal frame part up and down,
The press drive mechanism is mounted on the upper horizontal frame portion, and the press drive mechanism is rotatably supported by the upper horizontal frame portion around a fulcrum that is a horizontal rotation axis, and is rotated horizontally. A crank member having a force point and an action point which is a dynamic axis; a forward / backward member which is advanced and retracted in a horizontal direction by an advance / retreat drive mechanism; and is rotatably connected to the force point; A lifting member connected to the ram,
When the crank member is in an arbitrary rotation posture within the rotation range of the crank member, the action point is located in the horizontal direction with respect to the fulcrum, and the force point is separated in the vertical direction with respect to the fulcrum. Position to,
The advance / retreat member is disposed below the fulcrum,
Before SL press frame, said a top shape opposite side of the distal end and the pillar portion of the horizontal frame portion is separated without being connected to the lower horizontal frame portion, the fulcrum of said crank member, than the action point distal end and positioned above the point of force, the reciprocating member and the lifting member flop less machines shall intersect in side view. 前記進退駆動機構は、前記進退部材の前記力点との連結端と反対側端に連結された偏心部材と、この偏心部材を回転駆動するサーボモータとを有し、前記昇降部材が上死点にあるときの前記偏心部材の位相を、ラムの重力によって前記進退部材に作用する力で回動しない位相とした請求項１または請求項２記載のプレス機械。   The advance / retreat drive mechanism includes an eccentric member connected to an end opposite to the connection end of the advance / retreat member with the force point, and a servo motor that rotationally drives the eccentric member. The press machine according to claim 1 or 2, wherein a phase of the eccentric member at a certain time is a phase that does not rotate due to a force acting on the advance / retreat member by gravity of a ram.
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CN104441723A (en) * 2014-10-27 2015-03-25 合肥市东庐机械制造有限公司 Lightweight integrated power transmission mechanism for punching machine
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CN2401363Y (en) * 1999-11-23 2000-10-18 江都市锻压机床总厂 Press
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