JP4509740B2 - Molding method using servo press - Google Patents
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- JP4509740B2 JP4509740B2 JP2004318280A JP2004318280A JP4509740B2 JP 4509740 B2 JP4509740 B2 JP 4509740B2 JP 2004318280 A JP2004318280 A JP 2004318280A JP 2004318280 A JP2004318280 A JP 2004318280A JP 4509740 B2 JP4509740 B2 JP 4509740B2
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Description
本発明は、サーボプレスを用いて上型と下型により複合加工を行うサーボプレスを用いた成形方法に関する。 The present invention relates to a molding method using a servo press that performs combined processing using an upper mold and a lower mold using a servo press.
近年、ＡＣサーボモータを用いたサーボプレスが普及してきており、その高生産性が注目されている。サーボプレスは、サーボ制御によりスライドを自由かつ高精度に動作させることが可能で、加工速度、ストローク、加圧力を所望な値に制御することができる。また、リンク機構の採用により小出力のモータで大きな成形力を発生することができるようになった。 In recent years, servo presses using AC servomotors have become widespread, and their high productivity has attracted attention. The servo press can operate the slide freely and with high precision by servo control, and can control the processing speed, stroke, and applied pressure to desired values. In addition, a large molding force can be generated with a small output motor by adopting a link mechanism.
そして、サーボプレスを適用して、スライドが上限位置から次に上限位置に戻るまでの間、上限位置より低い所定の待機位置と、この待機位置より低い所定の下限位置との間で、スライドを所定回数反復駆動して多段モーション加工を行う際に、下限位置、待機位置、下限位置での加圧時間、待機位置での停止時間、下限位置での加圧力などの加工条件を、各段毎に自由に設定して、多工程加工や複合加工を行う装置及びその方法が提案されている（例えば、特許文献１参照）。 Then, by applying the servo press, the slide is moved between a predetermined standby position lower than the upper limit position and a predetermined lower limit position lower than the standby position until the slide returns from the upper limit position to the next upper limit position. When performing multi-stage motion machining by repeatedly driving a predetermined number of times, machining conditions such as the lower limit position, standby position, pressurization time at the lower limit position, stop time at the standby position, pressurizing force at the lower limit position are set for each stage. An apparatus and a method for performing multi-step machining and complex machining by freely setting them to have been proposed (for example, see Patent Document 1).
しかし、特許文献１に開示された装置及びその方法においては、多段モーション加工が単に下降領域、加圧工程、上昇領域を繰り返すだけであり、各段の加圧工程では必ず所定時間だけ加圧力を保持することになる。
従って、この装置及びその方法を用いて絞り加工後に、下死点でワークを加圧しスライドを停止した状態でワークにピアス加工を行うと、加圧力保持によるモータへの負荷、下死点付近でのフレームの伸び、温度上昇に起因する金型の変形などの問題が生じる虞がある。
However, in the apparatus and method disclosed in Patent Document 1, the multi-stage motion processing simply repeats the descending region, the pressurizing step, and the ascending region. Will hold.
Therefore, after drawing using this device and its method, when the workpiece is pierced with the workpiece pressed at the bottom dead center and the slide stopped, the load on the motor due to the holding of the applied pressure, near the bottom dead center There is a possibility that problems such as the deformation of the mold due to the elongation of the frame and the temperature rise may occur.
本発明は、従来の技術が有するこのような問題点に鑑みてなされたものであり、その目的とするところは、複合加工における設備に対する負荷を軽減し、トータル加工時間を短縮することができるサーボプレスを用いた成形方法を提供しようとするものである。 The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to reduce the load on equipment in complex machining and reduce the total machining time. An object of the present invention is to provide a molding method using a press.
上記課題を解決すべく請求項１に係る発明は、サーボプレスを用いて上型と下型により複合加工を行う成形方法であって、スライドを下降させ下死点で加圧保持してワークに絞り加工を行った後、前記上型を開放させ、次いで絞り加工が施された前記ワークに前記上型側に設けた駆動手段によるピアスポンチの作動によりピアス加工を行うものである。 In order to solve the above-mentioned problem, the invention according to claim 1 is a molding method in which a servo press is used to perform composite processing with an upper mold and a lower mold, and the slide is lowered and held at the bottom dead center to pressurize the workpiece. After the drawing process, the upper mold is opened, and then the workpiece subjected to the drawing process is pierced by the operation of the piercing punch by the driving means provided on the upper mold side.
請求項２に係る発明は、サーボプレスを用いて上型と下型により複合加工を行う成形方法であって、スライドを下降させ下死点で加圧保持してワークに絞り加工を行った後、前記スライドを所定位置まで上昇させて停止させ、次いで絞り加工が施された前記ワークに前記上型側に設けた駆動手段によるピアスポンチの作動によりピアス加工を行うものである。 The invention according to claim 2 is a molding method for performing combined machining with an upper die and a lower die using a servo press, after the slide is lowered and pressed at the bottom dead center to perform drawing processing on the workpiece. The slide is lifted to a predetermined position and stopped, and then the piercing is performed by the operation of the piercing punch by the driving means provided on the upper die side on the work subjected to the drawing.
以上説明したように本発明によれば、絞り加工後にスライドを下死点からわずかに上昇させてワークに対して加圧力を保持することなくピアス加工を行うので、モータの負荷が増大したり、金型の温度が上昇して金型が変形したりすることがなく、複合加工におけるトータル加工時間も短縮され、生産性が向上する。 As described above, according to the present invention, after the drawing process, the slide is slightly lifted from the bottom dead center and the piercing process is performed without holding the pressing force on the workpiece. The mold temperature does not rise and the mold is not deformed, the total machining time in the complex machining is shortened, and the productivity is improved.
以下に本発明の実施の形態を添付図面に基づいて説明する。ここで、図１は本発明に係るサーボプレスを用いた成形方法を実施する装置の概要断面図、図２は孔開け装置の動作状態を示す概要断面図、図３はスライドのストロークと時間の関係図、図４は成形方法の説明図である。 Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic cross-sectional view of an apparatus for performing a molding method using a servo press according to the present invention, FIG. 2 is a schematic cross-sectional view showing an operation state of a punching apparatus, and FIG. FIG. 4 is a diagram for explaining the forming method.
本発明に係るサーボプレスを用いた成形方法を実施する装置は、図１に示すように、スライド１の下面に上型２を取り付け、ベッド３の上方にガイドポスト４を介してボルスタ５が設けられ、更にベッド３の上面に下型（パンチ）６がボルスタ５から突出して配設されている。また、上型２の内部にピアス加工用の孔開け装置１０がスライド１に固定されて収納されている。孔開け装置１０は上型２に固定して設けてもよい。 As shown in FIG. 1, an apparatus for carrying out a molding method using a servo press according to the present invention has an upper mold 2 attached to the lower surface of a slide 1 and a bolster 5 provided above a bed 3 via a guide post 4. Further, a lower die (punch) 6 is provided on the upper surface of the bed 3 so as to protrude from the bolster 5. Also, a piercing device 10 is housed in the upper mold 2 by being fixed to the slide 1. The punching device 10 may be fixed to the upper mold 2.
更に、スライド１を上下方向に駆動すると共に、加工速度、ストローク、加圧力を所望な値に制御することができるサーボプレス（不図示）が設けられている。サーボプレスは、ＡＣサーボモータやＡＣサーボモータを制御する機器などを備えている。 Further, a servo press (not shown) is provided that can drive the slide 1 in the vertical direction and can control the processing speed, stroke, and applied pressure to desired values. The servo press is equipped with an AC servo motor, a device for controlling the AC servo motor, and the like.
孔開け装置１０は、図２に示すように、ピアスポンチ１１と、ピアスポンチ１１を固定するポンチ固定部材１２と、ポンチ固定部材１２を押圧する押圧部材１３と、押圧部材１３をシリンダロッド１４ａの先端に取り付けた油圧シリンダ１４と、ピアスポンチ１１、ポンチ固定部材１２、押圧部材１３を案内するハウジング１５からなる。 As shown in FIG. 2, the punching device 10 includes a pierce punch 11, a punch fixing member 12 that fixes the piercing punch 11, a pressing member 13 that presses the punch fixing member 12, and the pressing member 13 of the cylinder rod 14a. It consists of a hydraulic cylinder 14 attached to the tip, a pierce punch 11, a punch fixing member 12, and a housing 15 for guiding the pressing member 13.
更に、ポンチ固定部材１２と押圧部材１３で、カムを構成している。また、下型としてのパンチ６には、ピアス加工時に、ピアスポンチ１１の先端が入り込むボタンダイ１６が設けられている。なお、図２（ａ）は絞り加工時、同（ｂ）はピアス加工時の孔開け装置１０の状態を示す。 Further, the punch fixing member 12 and the pressing member 13 constitute a cam. The punch 6 as the lower die is provided with a button die 16 into which the tip of the piercing punch 11 enters during piercing. 2A shows the state of the punching device 10 during drawing, and FIG. 2B shows the state of the punching device 10 during piercing.
以上のように構成された装置による本発明に係るサーボプレスを用いた成形方法について説明する。
先ず、図３と図４（ａ）に示すように、スライド１が上死点に位置し、孔開け装置１０はピアスポンチ１１を後退させた状態で、薄鋼板のワークＷをボルスタ５とパンチ６上にセットし、スライド１をストロークＳＴ１だけ時間Ｔ１で下降させる。すると、スライド１がストロークＳＴ１だけ下降することにより、上型２がワークＷに当接する。
A forming method using the servo press according to the present invention by the apparatus configured as described above will be described.
First, as shown in FIG. 3 and FIG. 4 (a), the slide 1 is located at the top dead center, and the punching device 10 moves the pierced punch 11 backward and the workpiece W of the thin steel plate is punched with the bolster 5 6 is set, and slide 1 is lowered at time T1 by stroke ST1. Then, the upper die 2 comes into contact with the workpiece W by the slide 1 being lowered by the stroke ST1.
次いで、図３と図４（ｂ）に示すように、上型２がワークＷに当接してから、スライド１を更にストロークＳＴ２だけ時間Ｔ２で下降させると、スライド１は下死点に至る。そして、スライド１が下死点に到達した後、時間Ｔ３だけ加圧力を保持する。すると、上型２とパンチ６によりワークＷに絞り加工が施こされる。 Next, as shown in FIGS. 3 and 4B, when the slide 1 is further lowered at time T2 by the stroke ST2 after the upper mold 2 comes into contact with the workpiece W, the slide 1 reaches the bottom dead center. Then, after the slide 1 reaches the bottom dead center, the pressing force is maintained for a time T3. Then, the work W is drawn by the upper die 2 and the punch 6.
次いで、図３と図４（ｃ）に示すように、上型２のワークＷに対する加圧力がゼロになるようにスライド１を下死点からわずかなストロークＳＴ３だけ上昇させた後、油圧シリンダ１４を前進動作させ押圧部材１３でポンチ固定部材１２を水平方向に押圧する。ポンチ固定部材１２と押圧部材１３でカムを構成しているので、ポンチ固定部材１２は押圧部材１３の水平方向の押圧動作によりハウジング１５で案内されて垂直方向に下降する。 Next, as shown in FIGS. 3 and 4C, the slide 1 is raised from the bottom dead center by a slight stroke ST3 so that the pressure applied to the workpiece W of the upper mold 2 becomes zero, and then the hydraulic cylinder 14 The punch fixing member 12 is pressed in the horizontal direction by the pressing member 13. Since the punch fixing member 12 and the pressing member 13 form a cam, the punch fixing member 12 is guided by the housing 15 by the horizontal pressing operation of the pressing member 13 and descends in the vertical direction.
すると、ポンチ固定部材１２に固定されたピアスポンチ１１はパンチ６に設けられたボタンダイ１６に向かって突出する。そして、ピアスポンチ１１とボタンダイ１６によりワークＷにピアス加工が施こされる。 Then, the piercing punch 11 fixed to the punch fixing member 12 protrudes toward the button die 16 provided on the punch 6. Then, the workpiece W is pierced by the piercing punch 11 and the button die 16.
このように、スライド１を下死点からわずかなストロークＳＴ３だけ上昇させるので、スライド１に不必要な昇降動作をさせることなく、また上型２のワークＷに対する加圧力をゼロにしてピアス加工を行うので、ＡＣサーボモータに対する不要な負荷や上型２及び下型６の温度上昇が発生することがない。 In this way, since the slide 1 is lifted by a slight stroke ST3 from the bottom dead center, the piercing process is performed without causing the slide 1 to move up and down unnecessarily and with zero pressure applied to the workpiece W of the upper die 2. As a result, unnecessary load on the AC servo motor and temperature rise of the upper mold 2 and the lower mold 6 do not occur.
次いで、図３と図４（ｄ）に示すように、油圧シリンダ１４を後退動作させて押圧部材１３を後退させる。すると、ピアスポンチ１１の下降により縮装されたスプリング（不図示）によりピアスポンチ１１はポンチ固定部材１２と共に上昇してボタンダイ１６から離れ、上型２とハウジング１５に収納される。なお、ピアス加工の加工時間は、時間Ｔ４である。 Next, as shown in FIGS. 3 and 4 (d), the hydraulic cylinder 14 is moved backward to retract the pressing member 13. Then, the pierce punch 11 is lifted together with the punch fixing member 12 by a spring (not shown) that is contracted by the lowering of the pierce punch 11, is separated from the button die 16, and is stored in the upper mold 2 and the housing 15. In addition, the processing time of the piercing process is time T4.
次いで、図３と図４（ｅ）に示すように、スライド１を時間Ｔ５だけ上昇させて上死点に戻し、ワークＷの絞り加工とピアス加工の１サイクル（成形時間はＴ１＋Ｔ２＋Ｔ３＋Ｔ４＋Ｔ５）の作業が終了する。 Next, as shown in FIG. 3 and FIG. 4 (e), the slide 1 is raised by time T5 and returned to the top dead center. finish.
このように、絞り加工のみを行うのに必要とされる時間（Ｔ１＋Ｔ２＋Ｔ３＋Ｔ５）に、ピアス加工に必要とされる油圧シリンダ１４を前進・後退させるだけの時間Ｔ４を足すだけで、絞り加工とピアス加工のトータル加工時間になるので、トータル加工時間の短縮が図れる。 In this way, the drawing and piercing operations are simply performed by adding the time T4 required to move the hydraulic cylinder 14 forward and backward required for piercing to the time required for performing only the drawing (T1 + T2 + T3 + T5). Therefore, the total machining time can be shortened.
なお、本発明の実施の形態では、孔開け装置１０の駆動手段を油圧シリンダ１４で構成したが、電動モータで構成することもできる。電動モータを用いる場合には、カムを構成するポンチ固定部材１２や押圧部材１３などの代わりに減速機構や回転・直進運動変換機構などを必要とする。 In the embodiment of the present invention, the driving means of the punching device 10 is configured by the hydraulic cylinder 14, but may be configured by an electric motor. In the case of using an electric motor, a speed reduction mechanism, a rotation / linear motion conversion mechanism, or the like is required instead of the punch fixing member 12 and the pressing member 13 constituting the cam.
絞り加工後にスライドを下死点からわずかに上昇させてワークに対する加圧力を保持せずにピアス加工を行うので、モータの負荷が増大したり、金型の温度が上昇して金型が変形したりすることがなく、複合加工におけるトータル加工時間も短縮され、サーボプレスの特徴を生かした成形方法を実現することができる。 After drawing, the slide is lifted slightly from the bottom dead center, and piercing is performed without maintaining the pressure applied to the workpiece. Therefore, the load on the motor increases, the mold temperature rises, and the mold deforms. In addition, the total machining time in the complex machining can be shortened, and a molding method utilizing the features of the servo press can be realized.
１…スライド、２…上型、３…ベッド、５…ボルスタ、６…下型（パンチ）、１０…孔開け装置、１１…ピアスポンチ、１２…ポンチ固定部材、１３…押圧部材、１４…油圧シリンダ、１５…ハウジング、１６…ボタンダイ、Ｗ…ワーク。 DESCRIPTION OF SYMBOLS 1 ... Slide, 2 ... Upper type | mold, 3 ... Bed, 5 ... Bolster, 6 ... Lower type | mold (punch), 10 ... Hole punching device, 11 ... Pierce punch, 12 ... Punch fixing member, 13 ... Pressing member, 14 ... Hydraulic pressure Cylinder, 15 ... housing, 16 ... button die, W ... workpiece.
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| JP2004318280A JP4509740B2 (en) | 2004-11-01 | 2004-11-01 | Molding method using servo press |
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| JP2004318280A JP4509740B2 (en) | 2004-11-01 | 2004-11-01 | Molding method using servo press |
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| JP2006122996A JP2006122996A (en) | 2006-05-18 |
| JP4509740B2 true JP4509740B2 (en) | 2010-07-21 |
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| JP5982560B2 (en) | 2013-04-02 | 2016-08-31 | 株式会社キーレックス | Press machine |
| CN113547014B (en) * | 2021-07-22 | 2023-04-28 | 蒙飞燕 | Automatic stamping equipment is used in production of electron stamping workpiece |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0357517A (en) * | 1989-07-27 | 1991-03-12 | Nissan Motor Co Ltd | Press working device |
| JPH0890093A (en) * | 1994-07-26 | 1996-04-09 | Toyota Motor Corp | Combination press forming method and device therefor |
| JP2004017122A (en) * | 2002-06-19 | 2004-01-22 | Komatsu Ltd | Method for protecting motor for servo press from overload |
| JP2006122997A (en) * | 2004-11-01 | 2006-05-18 | Honda Motor Co Ltd | Forming method using servo press |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0357517A (en) * | 1989-07-27 | 1991-03-12 | Nissan Motor Co Ltd | Press working device |
| JPH0890093A (en) * | 1994-07-26 | 1996-04-09 | Toyota Motor Corp | Combination press forming method and device therefor |
| JP2004017122A (en) * | 2002-06-19 | 2004-01-22 | Komatsu Ltd | Method for protecting motor for servo press from overload |
| JP2006122997A (en) * | 2004-11-01 | 2006-05-18 | Honda Motor Co Ltd | Forming method using servo press |
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