JP2003311341A - Press processing method and device for sheet using blank inlet velocity control - Google Patents
Press processing method and device for sheet using blank inlet velocity controlInfo
- Publication number
- JP2003311341A JP2003311341A JP2002118976A JP2002118976A JP2003311341A JP 2003311341 A JP2003311341 A JP 2003311341A JP 2002118976 A JP2002118976 A JP 2002118976A JP 2002118976 A JP2002118976 A JP 2002118976A JP 2003311341 A JP2003311341 A JP 2003311341A
- Authority
- JP
- Japan
- Prior art keywords
- material inflow
- speed
- punch
- wrinkle
- inflow speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は自動車用部品、家電
製品用部品、容器等を、鋼板、アルミ板等の薄板材をプ
レス加工することにより製造する方法及び装置に関し、
加工中にシワ押さえ圧力を制御するプレス加工方法及び
プレス装置に係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing automobile parts, home electric appliance parts, containers, etc. by pressing a thin plate material such as a steel plate or an aluminum plate.
The present invention relates to a press working method and a press device for controlling a wrinkle pressing pressure during working.
【０００２】[0002]
【従来の技術】シワ押さえはシワの発生を防ぐために設
置されているものであり、シワ押さえ圧力を増加させる
と成形限界が低下して割れが発生しやすくなる。従来
は、シワ押さえ圧力はシワを発生しない必要最小限かけ
れば良く、厳密な制御は必要とされていなかった。しか
しながら昨今、自動車の環境対策、安全性向上の要求か
ら高強度鋼板の適用が拡大しており、高精度のシワ押さ
え圧力制御が必要となってきている。2. Description of the Related Art A wrinkle retainer is installed to prevent the generation of wrinkles. If the pressure of wrinkle retainer is increased, the molding limit is lowered and cracking is likely to occur. Heretofore, the wrinkle pressing pressure has only to be the minimum necessary amount that does not cause wrinkles, and strict control has not been required. However, in recent years, the application of high-strength steel sheets has expanded due to the demands for environmental measures and safety improvement of automobiles, and high-precision wrinkle pressing pressure control has become necessary.
【０００３】薄板のプレス加工においてシワ押さえ圧力
（ＢＨＦ）が高すぎる場合は、材料に過大な張力がかか
り「割れ」が発生し、低すぎる場合には材料の張力が不
足し「シワ」が発生することが一般的に知られている。
しかし材料の特性のバラツキにより、プレス加工に対す
るシワ押さえ圧力の適正値は変動する問題があった。そ
の対策として、シワ押さえ圧力（荷重）の制御に関し、
特開平７−２６６１００号公報には、予め素材の物理量
と適正シワ押さえ荷重との関係を求めておき、実際の物
理量に応じて適正シワ押さえ荷重を求め、プレス加工時
にシワ押さえ荷重を制御する方法が開示されている。When the wrinkle pressing pressure (BHF) is too high in the pressing of a thin plate, excessive tension is applied to the material to cause "cracking", and when it is too low, the material tension is insufficient and "crease" occurs. It is generally known to do.
However, there is a problem that the appropriate value of the wrinkle holding pressure for press working varies due to the variation in material properties. As a countermeasure, regarding wrinkle pressure (load) control,
Japanese Patent Laid-Open No. 7-266100 discloses a method of previously obtaining a relationship between a physical quantity of a material and an appropriate wrinkle holding load, obtaining an appropriate wrinkle holding load according to an actual physical quantity, and controlling the wrinkle holding load during press working. Is disclosed.
【０００４】[0004]
【発明が解決しようとする課題】しかし、特開平７−２
６６１００号公報に開示された発明は、シワ抑え荷重が
目標値である一定値となるように制御する方法であり、
加工中にシワ押さえ荷重の目標値を制御する技術は開示
されていない。本発明は、薄板のプレス加工において
「割れ」「シワ」の発生がシワ押さえへの材料の流入速
度の過不足によることに着目し、加工中に発生する「割
れ」、「シワ」を防止する方法及び装置を提供すること
を目的とする。However, JP-A-7-2
The invention disclosed in Japanese Patent No. 66100 is a method of controlling the wrinkle suppressing load to be a constant value which is a target value,
No technique is disclosed for controlling the target value of the wrinkle pressing load during processing. The present invention focuses on the fact that the occurrence of "cracks" and "wrinkles" in the press working of thin plates is due to the excess or deficiency of the inflow speed of the material into the wrinkle holder, and prevents "cracks" and "wrinkles" that occur during processing. It is an object to provide a method and a device.
【０００５】[0005]
【課題を解決するための手段】係る課題を解決するた
め、本発明の要旨とするところは、下記のとおりであ
る。
（１）プレス加工中において材料流入速度を測定し、材
料流入速度が所定範囲内となるようにシワ押さえ圧力を
制御することを特徴とする材料流入速度制御を用いた薄
板のプレス加工方法。
（２）プレス加工中においてポンチ移動速度および材料
流入速度を測定し、ポンチ移動速度に対する材料流入速
度が所定範囲内となるようにシワ押さえ圧力を制御する
ことを特徴とする材料流入速度制御を用いた薄板のプレ
ス加工方法。
（３）予めポンチ移動速度に対する材料流入速度の目標
値を定め、前記材料流入速度の目標値の±11％以内とな
るようにシワ押さえ圧力を制御することを特徴とする前
記（2）記載の材料流入速度制御を用いた薄板のプレス
加工方法。
（４）プレス加工中において材料流入量を測定し、前記
材料流入量に基づいて材料流入速度を算出し、前記材料
流入速度が所定範囲内となるようにシワ押さえ圧力を制
御することを特徴とする材料流入速度制御を用いた薄板
のプレス加工方法。
（５）プレス加工中においてポンチ移動量および材料流
入量を測定し、前記ポンチ移動量及び材料流入量に基づ
いて前記ポンチ移動速度に対する材料流入速度を算出
し、前記材料流入速度が所定範囲内となるようにシワ押
さえ圧力を制御することを特徴とする材料流入速度制御
を用いた薄板のプレス加工方法。
（６）予めポンチ移動量に対する材料流入量の目標値を
定め、前記材料流入量の目標値に基づいて材料流入速度
の目標値を定め、前記流入速度の目標値の±１１％以内
となるようにシワ押さえ圧力を制御することを特徴とす
る前記（４）又は（５）記載の材料流入速度制御を用い
た薄板のプレス加工方法。
（７）ポンチ、ダイス及びシワ押さえと、更にプレス加
工中のポンチ移動速度測定手段と材料流入速度測定手段
と、前記ポンチ移動速度測定手段で測定したポンチ移動
速度と材料流入速度測定手段で測定した材料流入速度に
基づいて前記シワ押さえのシワ押さえ圧力を調整する制
御手段を有することを特徴とする材料流入速度制御を用
いた薄板のプレス加工装置。
（８）ポンチ、ダイス及びシワ押さえと、更にプレス加
工中のポンチ移動量測定手段と材料流入量測定手段と、
前記ポンチ移動量測定手段で測定したポンチ移動量と材
料流入量測定手段で測定した材料流入量に基づいて材料
流入速度の目標値を求める材料流入速度演算手段と、前
記材料流入速度演算手段で求めた材料流入速度の目標値
に基づいて前記シワ押さえのシワ押さえ圧力を調整する
制御手段を有することを特徴とする材料流入速度制御を
用いた薄板のプレス加工装置。
（９）材料流入速度測定手段又は材料流入量測定手段が
シワ押さえに設置されていることを特徴とする前記
（７）又は（８）記載の材料流入速度制御を用いた薄板
のプレス加工装置。In order to solve such a problem, the gist of the present invention is as follows. (1) A method of pressing a thin plate using material inflow speed control, which comprises measuring a material inflow speed during press working and controlling a wrinkle pressing pressure so that the material inflow speed is within a predetermined range. (2) The material inflow speed control is characterized in that the punch moving speed and the material inflow speed are measured during press working, and the wrinkle holding pressure is controlled so that the material inflow speed with respect to the punch moving speed is within a predetermined range. Pressing method for thin sheets. (3) The target value of the material inflow speed with respect to the punch moving speed is set in advance, and the wrinkle holding pressure is controlled so as to be within ± 11% of the target value of the material inflow speed. A method for pressing a thin plate using a material inflow speed control. (4) The material inflow rate is measured during press working, the material inflow rate is calculated based on the material inflow rate, and the wrinkle holding pressure is controlled so that the material inflow rate is within a predetermined range. Pressing method for thin plate using controlled material inflow speed. (5) The punch movement amount and the material inflow amount are measured during the press working, and the material inflow speed with respect to the punch movement speed is calculated based on the punch movement amount and the material inflow amount, and the material inflow speed is within a predetermined range. A method for pressing a thin plate using material inflow speed control, which is characterized in that the wrinkle pressing pressure is controlled so that (6) The target value of the material inflow amount with respect to the punch movement amount is set in advance, and the target value of the material inflow speed is determined based on the target value of the material inflow amount so that it is within ± 11% of the target value of the inflow speed. The method for pressing a thin plate using the material inflow speed control according to the above (4) or (5), characterized in that the wrinkle pressing pressure is controlled. (7) Punch, die and wrinkle holder, and punch moving speed measuring means and material inflow speed measuring means during press working, and punch moving speed and material inflow speed measuring means measured by the punch moving speed measuring means. A thin plate press working apparatus using material inflow speed control, comprising control means for adjusting the wrinkle pressing pressure of the wrinkle presser based on the material inflow speed. (8) Punch, die and wrinkle holder, and punch movement amount measuring means and material inflow amount measuring means during press working,
Material inflow speed calculation means for obtaining a target value of the material inflow speed based on the punch movement amount measured by the punch movement amount measurement means and the material inflow amount measured by the material inflow amount measurement means, and the material inflow velocity calculation means A thin plate press working apparatus using material inflow speed control, comprising control means for adjusting the wrinkle pressing pressure of the wrinkle presser based on a target value of the material inflow speed. (9) The thin plate press working apparatus using the material inflow speed control according to (7) or (8), wherein the material inflow speed measuring means or the material inflow amount measuring means is installed on the wrinkle retainer.
【０００６】[0006]
【発明の実施の形態】以下、本発明について、詳細に説
明する。図１はプレス加工前の例、図２はプレス加工後
の例を示している。まず、ダイス２上の材料４に対し
て、シワ押さえが上から圧力をかける。加工においてポ
ンチ１が上から移動して材料４をプレスする。この際、
ポンチ１とダイス２の間の材料４には、シワ押さえの圧
力により張力が発生している。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. FIG. 1 shows an example before press working, and FIG. 2 shows an example after press working. First, the wrinkle presser applies pressure to the material 4 on the die 2 from above. In processing, the punch 1 moves from above and presses the material 4. On this occasion,
Tension is generated in the material 4 between the punch 1 and the die 2 by the pressure of the wrinkle presser.
【０００７】図３は前記（７）〜（９）に係る本発明の
装置構成例を示している。ポンチ１にポンチ移動速度測
定手段６が設置されており、プレス加工に際してポンチ
移動速度を測定する。ポンチ移動速度測定手段６はポン
チ位置検出器によりポンチ移動量測定手段（図示しな
い）としてもよく、ポンチ移動量を時間微分することに
よりポンチ移動速度を得ることもできる。また、シワ押
さえ３に材料流入速度測定手段５が設置されており、プ
レス加工に際してシワ押さえへの材料流入速度を測定す
る。材料流入速度測定手段５はパルスジェネレーターを
接続した車輪を材料に押し付けて材料流入量を測定する
材料流入量測定手段（図示しない）とし、材料流入量を
時間微分することにより得ることができる。また、材料
に予め等間隔の線又は網目を描き、シワ押さえ３に備え
た線又は網目の検出器（材料流入速度測定手段５又は材
料流入量測定手段）により材料に描かれた線又は網目の
通過を検知することにより材料流入速度又は材料流入量
を測定する方法もある。この場合も材料流入速度は、材
料流入量を時間微分することにより得ることができる。
さらに、レーザードップラー方式等による材料速度計を
用いることにより直接、材料流入速度を測定することも
できる。材料流入速度測定手段５又は材料流入量測定手
段をシワ押さえ３に設置すると、位置調整等の装置が不
要となる利点があるが、シワ押さえ３に設置しなくとも
測定は可能である。FIG. 3 shows an example of the apparatus configuration of the present invention according to (7) to (9) above. A punch moving speed measuring means 6 is installed in the punch 1 and measures the punch moving speed during press working. The punch moving speed measuring means 6 may be a punch moving amount measuring means (not shown) using a punch position detector, or the punch moving speed can be obtained by differentiating the punch moving amount with time. Further, a material inflow speed measuring means 5 is installed on the wrinkle retainer 3 to measure the material inflow velocity into the wrinkle retainer during press working. The material inflow rate measuring means 5 is a material inflow rate measuring means (not shown) that measures the material inflow rate by pressing a wheel to which a pulse generator is connected to the material, and can be obtained by differentiating the material inflow rate with respect to time. In addition, lines or meshes that are evenly spaced are drawn on the material in advance, and lines or meshes drawn on the material by the line or mesh detector (material inflow velocity measuring means 5 or material inflow amount measuring means) provided in the wrinkle retainer 3 are drawn. There is also a method of measuring the material inflow velocity or the material inflow rate by detecting passage. Also in this case, the material inflow rate can be obtained by differentiating the material inflow amount with respect to time.
Further, the material inflow velocity can be directly measured by using a material velocity meter of a laser Doppler method or the like. If the material inflow velocity measuring means 5 or the material inflow amount measuring means is installed in the wrinkle holder 3, there is an advantage that a device such as position adjustment is unnecessary, but the measurement is possible without installing it in the wrinkle holder 3.
【０００８】図４はプレスに先立って実施したテストプ
レスにより定められた、ポンチ移動速度と材料流入速度
の目標値の例を示している。プレス装置の形式により、
ポンチ移動速度およびポンチ移動速度のパターンは異な
るが、いずれの形式のプレス装置においても事前にテス
トプレスを行うことにより、ポンチ移動速度に対する材
料流入速度の目標値を得ることができる。FIG. 4 shows an example of target values of the punch moving speed and the material inflow speed, which are determined by a test press carried out prior to the press. Depending on the type of press equipment,
Although the punch moving speed and the pattern of the punch moving speed are different, a target value of the material inflow speed with respect to the punch moving speed can be obtained by performing a test press in advance in any type of press device.
【０００９】また、図５に示すように、プレスに先立っ
て実施したテストプレスにより求められた目標値をポン
チ移動量に対する材料流入量で整理することもできる。
図５によるプレス方法では、ポンチ移動量とポンチ移動
量を時間微分して得られるポンチ移動速度および材料流
入量から、材料流入速度の目標値を算出できるので、後
述の図６に従い、材料流入速度が適正範囲となるように
シワ押さえ圧力を制御することにより、割れやシワが発
生しないプレス成形を実現できる。Further, as shown in FIG. 5, the target value obtained by the test press carried out prior to the pressing can be arranged by the material inflow amount with respect to the punch moving amount.
In the pressing method according to FIG. 5, the target value of the material inflow speed can be calculated from the punch movement amount and the punch movement speed and the material inflow amount obtained by differentiating the punch movement amount with time. By controlling the wrinkle pressing pressure so that is within an appropriate range, it is possible to realize press molding without cracks or wrinkles.
【００１０】図６は材料流入速度とシワ押さえ圧力との
関係の例を示しており、シワ押さえ圧力を制御すること
により、材料流入速度を適正値範囲に収めることができ
る。材料流入速度が適正範囲より多いと材料にかかる張
力が過少となるためシワが発生し、適正範囲より少ない
と材料にかかる張力が過大となるため、割れが発生す
る。FIG. 6 shows an example of the relationship between the material inflow speed and the wrinkle holding pressure. By controlling the wrinkle holding pressure, the material inflow speed can be kept within an appropriate value range. If the material inflow speed is higher than the proper range, the tension applied to the material will be too small to cause wrinkles, and if it is less than the proper range, the tension applied to the material will be excessive, resulting in cracking.
【００１１】前記（１）に係る発明では、上記に説明し
たようにプレス加工中において材料流入速度を測定し、
張力が所定範囲内となるようにシワ押さえ圧力を制御す
る。ポンチ流入量又はポンチ流入速度が一定又は既知の
場合は、材料流入速度のみを測定し、所定範囲内となる
ようにシワ押さえ圧力を制御すればよい。In the invention according to (1), as described above, the material inflow rate is measured during the press working,
The wrinkle pressing pressure is controlled so that the tension is within a predetermined range. When the punch inflow amount or the punch inflow velocity is constant or known, only the material inflow velocity may be measured and the wrinkle holding pressure may be controlled so as to be within a predetermined range.
【００１２】図７は本発明における材料特性のバラツキ
により材料流入速度とシワ押さえ圧力との関係が変化し
た場合の対応の例を示している。材料特性のバラツキに
より材料流入速度とシワ押さえ圧力との関係が実線から
点線に変化し（矢印）、材料流入速度が適正値範囲の
上限を超えた場合、シワ押さえ圧力を増加させ（矢印
）、材料流入速度を適正値範囲に制御している。FIG. 7 shows an example of a case where the relationship between the material inflow rate and the wrinkle pressing pressure is changed due to the variation of the material characteristics in the present invention. Due to variations in material properties, the relationship between the material inflow speed and the wrinkle holding pressure changes from the solid line to the dotted line (arrow), and when the material inflow speed exceeds the upper limit of the appropriate value range, the wrinkle holding pressure is increased (arrow), The material inflow speed is controlled within the proper value range.
【００１３】前記（２）に係る発明では、ポンチ移動速
度及び材料流入速度を測定し、図４に示したようにポン
チ移動速度に対する材料流入速度の目標を求め、図６に
示すように材料流入速度が所定範囲内となるようにシワ
押さえ圧力を制御する。In the invention according to (2), the punch moving speed and the material inflow speed are measured, the target of the material inflow speed with respect to the punch moving speed is obtained as shown in FIG. 4, and the material inflow is shown as shown in FIG. The wrinkle pressing pressure is controlled so that the speed is within a predetermined range.
【００１４】前記（３）に係る発明では、予めポンチ移
動速度に対する材料流入速度の目標値を定め、前記目標
値の±１１％以内となるようにシワ押さえ圧力を制御す
る。ポンチ移動速度と材料流入速度の目標値との関係
は、以下の方法により決定できる。In the invention according to (3), the target value of the material inflow speed with respect to the punch moving speed is set in advance, and the wrinkle pressing pressure is controlled so as to be within ± 11% of the target value. The relationship between the punch moving speed and the target value of the material inflow speed can be determined by the following method.
【００１５】すなわち、事前にシワ押さえ圧力を変化さ
せてテストプレスを実施し、割れもシワも発生しない最
適なプレスが行えた際のポンチ移動速度と材料流入速度
を記録し、材料流入速度の目標値とする。プレス加工中
に測定した材料流入量が目標値−１１％より小さいと割
れが発生し、目標値＋１１％より大きいとシワが発生す
るので、目標値±１１％以内となるようにシワ押さえ圧
力を制御することが好ましい。That is, a test press is carried out by changing the wrinkle pressing pressure in advance, and the punch moving speed and the material inflow speed at the time of the optimum press without cracks and wrinkles are recorded, and the target of the material inflow speed is recorded. The value. If the material inflow measured during press working is smaller than the target value -11%, cracking will occur, and if it is larger than the target value + 11%, wrinkles will occur. Therefore, the wrinkle holding pressure should be kept within the target value ± 11%. It is preferable to control.
【００１６】前記（４）に係る発明では、前記（１）の
発明で測定する材料流入速度の代わりに材料流入量を測
定して、その値から材料流入速度を算出し、材料流入速
度が所定範囲内となるようにシワ押さえ圧力を制御す
る。In the invention according to (4) above, instead of the material inflow rate measured in the above (1) invention, the material inflow rate is measured, and the material inflow rate is calculated from the value, and the material inflow rate is predetermined. Control the wrinkle holding pressure so that it is within the range.
【００１７】前記（５）に係る発明では、前記（２）に
係る発明で測定するポンチ移動速度及び材料流入速度の
代わりに、ポンチ移動量及び材料流入量を測定し、それ
らの値を時間微分することによりポンチ移動速度及び材
料流入速度を求め、前記ポンチ移動速度に対する材料流
入速度を算出し、前記材料流入速度が所定範囲内となる
ようにシワ押さえ圧力を制御する。In the invention according to (5), instead of the punch moving speed and the material inflow speed measured in the invention according to (2), the punch moving amount and the material inflow amount are measured, and these values are differentiated with respect to time. By doing so, the punch moving speed and the material inflow speed are obtained, the material inflow speed with respect to the punch moving speed is calculated, and the wrinkle pressing pressure is controlled so that the material inflow speed is within a predetermined range.
【００１８】また、前記（６）に係る発明では、前記
（３）に係る発明で予め定めるポンチ移動速度に対する
材料流入速度の目標値の代わりに、割れもシワも発生し
ない最適なプレスが行えた際のポンチ移動量に対する材
料流入量を目標として予め定め、ポンチ移動量および材
料流入量を測定し、ポンチ移動量、材料移ポンチ移動量
を時間微分して得られるポンチ移動速度および材料流入
量から、材料流入速度の目標値を定め、材料流入速度が
前記の目標値の±１１％以内となるようにシワ押さえ圧
力を制御する。Further, in the invention according to the above (6), an optimum press without cracks or wrinkles can be performed instead of the target value of the material inflow speed with respect to the punch moving speed which is predetermined in the invention according to the above (3). In advance, the material inflow amount relative to the punch movement amount is set as a target, the punch movement amount and the material inflow amount are measured, and the punch movement amount and the material movement punch movement amount are time differentiated to obtain the punch movement speed and the material inflow amount. The target value of the material inflow speed is determined, and the wrinkle holding pressure is controlled so that the material inflow speed is within ± 11% of the target value.
【００１９】[0019]
【実施例】以下、実施例について説明する。材料とし
て、直径２００mm、厚さ１．０mmの３５０MPa級冷延鋼
板を用いた。金型は円筒深絞り用でパンチは径１００m
m、肩Ｒ８mm、ダイスは径１０２．６mm、肩Ｒ８mmを用
いた。EXAMPLES Examples will be described below. As a material, a 350 MPa class cold-rolled steel sheet having a diameter of 200 mm and a thickness of 1.0 mm was used. The die is for deep cylindrical drawing, and the punch has a diameter of 100 m.
m, shoulder R8 mm, diameter 102.6 mm, shoulder R8 mm were used.
【００２０】本発明例として、図３に示すようにポンチ
１にポンチ移動速度測定装置６を設置し、ポンチ移動速
度を測定した。また、ダイス２に材料流入速度測定装置
５としてパルスジェネレーターを接続した車輪を材料に
押し付けて材料流入量を測定し、材料流入量を時間微分
することにより、プレス加工中の材料流入速度を測定し
た。プレス加工に先立ち、シワ押さえ圧を変化させてテ
ストプレスを実施し、割れもシワも発生しない最適なプ
レスの際のポンチ移動速度と材料流入速度を記録し、ポ
ンチ移動速度に対する材料流入速度の目標値とした。As an example of the present invention, as shown in FIG. 3, a punch moving speed measuring device 6 was installed on the punch 1 to measure the punch moving speed. In addition, the material inflow rate was measured by pressing a wheel having a pulse generator connected to the die 2 as a material inflow rate measuring device 5 against the material and measuring the material inflow rate, and differentiating the material inflow rate with time. . Prior to pressing, test pressing is performed by changing the wrinkle pressing pressure, the punch moving speed and the material inflow speed at the time of the optimum press that does not cause cracks or wrinkles are recorded, and the target of the material inflow speed against the punch moving speed is recorded. Value.
【００２１】本発明例ではプレス加工中に材料流入速度
を測定し、材料流入速度の測定値が目標値の±１１％以
内となるようにシワ押さえ圧力制御した。その結果、30
回のプレス加工において割れおよびシワの発生は皆無で
あった。一方、比較例ではプレス加工中のポンチ移動速
度および材料流入速度の測定を行わずに、シワ押さえ圧
力を９［Ton］一定として加工したところ、３０回のプ
レス加工において、シワ１件、割れ６件が発生した。In the example of the present invention, the material inflow rate was measured during press working, and the wrinkle holding pressure was controlled so that the measured value of the material inflow rate was within ± 11% of the target value. As a result, 30
No cracks or wrinkles were found during the pressing process once. On the other hand, in the comparative example, the punch movement speed and the material inflow speed during the press working were not measured, and the wrinkle pressing pressure was constant at 9 [Ton]. A case has occurred.
【００２２】[0022]
【発明の効果】本発明により、プレス加工において加工
中に発生する「割れ」、「シワ」を防止することができ
る。According to the present invention, it is possible to prevent "cracking" and "wrinkles" that occur during processing in press working.
【図１】プレス加工前の装置構成例を示す。FIG. 1 shows an example of a device configuration before press working.
【図２】プレス加工後の装置構成例を示す。FIG. 2 shows an example of a device configuration after press working.
【図３】本発明の装置構成例の概要を示す。FIG. 3 shows an outline of a device configuration example of the present invention.
【図４】ポンチ移動速度に対する材料流入速度の目標値
の例を示す図である。FIG. 4 is a diagram showing an example of a target value of a material inflow speed with respect to a punch moving speed.
【図５】ポンチ移動量に対する材料流入量の関係を示す
図である。FIG. 5 is a diagram showing a relationship between a punch movement amount and a material inflow amount.
【図６】材料流入速度とシワ押さえ圧力との関係の例を
示す図である。FIG. 6 is a diagram showing an example of a relationship between a material inflow speed and a wrinkle pressing pressure.
【図７】材料特性のバラツキにより材料流入速度とシワ
押さえ圧力との関係が変化した場合の対応の例を示す図
である。FIG. 7 is a diagram showing an example of a case in which a relationship between a material inflow rate and a wrinkle pressing pressure is changed due to variation in material characteristics.
１ ポンチ ２ ダイス ３ シワ押さえ ４ 材料 ５ 材料流入速度定手段 ６ ポンチ移動速度測定手段 1 punch 2 dice 3 wrinkle holder 4 materials 5 Material inflow rate determination means 6 Punch moving speed measuring means
Claims (9)
定し、材料流入速度が所定範囲内となるようにシワ押さ
え圧力を制御することを特徴とする材料流入速度制御を
用いた薄板のプレス加工方法。1. A method for pressing a thin plate using material inflow speed control, which comprises measuring a material inflow speed during press working and controlling a wrinkle pressing pressure so that the material inflow speed falls within a predetermined range. .
よび材料流入速度を測定し、ポンチ移動速度に対する材
料流入速度が所定範囲内となるようにシワ押さえ圧力を
制御することを特徴とする材料流入速度制御を用いた薄
板のプレス加工方法。2. A material inflow speed control, wherein the punch moving speed and the material inflow speed are measured during press working, and the wrinkle pressing pressure is controlled so that the material inflow speed with respect to the punch moving speed falls within a predetermined range. A method for pressing a thin plate using.
度の目標値を定め、前記目標値の±11％以内となるよう
にシワ押さえ圧力を制御することを特徴とする請求項２
記載の材料流入速度制御を用いた薄板のプレス加工方
法。3. The target value of the material inflow speed with respect to the punch moving speed is set in advance, and the wrinkle pressing pressure is controlled so as to be within ± 11% of the target value.
A method for pressing a thin plate using the described material inflow rate control.
し、前記材料流入量に基づいて材料流入速度を算出し、
前記材料流入速度が所定範囲内となるようにシワ押さえ
圧力を制御することを特徴とする材料流入速度制御を用
いた薄板のプレス加工方法。4. A material inflow rate is measured during press working, and a material inflow rate is calculated based on the material inflow rate,
A method for pressing a thin plate using the material inflow speed control, wherein the wrinkle pressing pressure is controlled so that the material inflow speed falls within a predetermined range.
び材料流入量を測定し、前記ポンチ移動量及び材料流入
量に基づいて前記ポンチ移動速度に対する材料流入速度
を算出し、前記材料流入速度が所定範囲内となるように
シワ押さえ圧力を制御することを特徴とする材料流入速
度制御を用いた薄板のプレス加工方法。5. A punch movement amount and a material inflow amount are measured during press working, and a material inflow velocity with respect to the punch movement speed is calculated based on the punch movement amount and the material inflow amount, and the material inflow velocity is within a predetermined range. A method for pressing a thin plate using material inflow speed control, which is characterized in that the wrinkle pressing pressure is controlled so as to be inside.
目標値を定め、前記材料流入量の目標値に基づいて材料
流入速度の目標値を定め、材料流入速度が前記流入速度
の目標値の±11％以内となるようにシワ押さえ圧力を制
御することを特徴とする請求項４又は５記載の材料流入
速度制御を用いた薄板のプレス加工方法。6. A target value of the material inflow amount with respect to the punch movement amount is set in advance, and a target value of the material inflow speed is determined based on the target value of the material inflow amount, and the material inflow speed is ± of the target value of the inflow speed. The press working method for a thin plate using the material inflow speed control according to claim 4 or 5, wherein the wrinkle pressing pressure is controlled to be within 11%.
プレス加工中のポンチ移動速度測定手段と材料流入速度
測定手段と、前記ポンチ移動速度測定手段で測定したポ
ンチ移動速度と材料流入速度測定手段で測定した材料流
入速度に基づいて前記シワ押さえのシワ押さえ圧力を調
整する制御手段を有することを特徴とする材料流入速度
制御を用いた薄板のプレス加工装置。7. A punch, a die and a wrinkle retainer, and a punch moving speed measuring means and a material inflow speed measuring means during press working, and a punch moving speed and a material inflow speed measuring means measured by the punch moving speed measuring means. A thin plate press working apparatus using material inflow speed control, comprising control means for adjusting the wrinkle pressing pressure of the wrinkle presser based on the measured material inflow speed.
プレス加工中のポンチ移動量測定手段と材料流入量測定
手段と、前記ポンチ移動量測定手段で測定したポンチ移
動量と材料流入量測定手段で測定した材料流入量に基づ
いて材料流入速度の目標値を求める材料流入速度演算手
段と、前記材料流入速度演算手段で求めた材料流入速度
目標値に基づいて前記シワ押さえのシワ押さえ圧力を調
整する制御手段を有することを特徴とする材料流入速度
制御を用いた薄板のプレス加工装置。8. A punch, a die and a wrinkle holder, and a punch movement amount measuring means and a material inflow amount measuring means during press working, and a punch movement amount and a material inflow amount measuring means measured by the punch movement amount measuring means. A material inflow speed calculation means for obtaining a target value of the material inflow speed based on the measured material inflow amount, and a wrinkle holding pressure of the wrinkle press is adjusted based on the material inflow speed target value obtained by the material inflow speed calculation means. A thin plate press working apparatus using a material inflow speed control, characterized by having a control means.
定手段がシワ押さえに設置されていることを特徴とする
請求項７又は８記載の材料流入速度制御を用いた薄板の
プレス加工装置。9. The thin plate press working apparatus using the material inflow speed control according to claim 7, wherein the material inflow speed measuring means or the material inflow amount measuring means is installed on the wrinkle retainer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007152427A (en) * | 2005-11-08 | 2007-06-21 | Toyota Motor Corp | Method and apparatus for determining press defect, and press forming apparatus |
| JP2009274137A (en) * | 2003-11-11 | 2009-11-26 | Nippon Steel Corp | Press forming apparatus, press forming method, computer program and recording medium |
-
2002
- 2002-04-22 JP JP2002118976A patent/JP4299491B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009274137A (en) * | 2003-11-11 | 2009-11-26 | Nippon Steel Corp | Press forming apparatus, press forming method, computer program and recording medium |
| JP2007152427A (en) * | 2005-11-08 | 2007-06-21 | Toyota Motor Corp | Method and apparatus for determining press defect, and press forming apparatus |
| JP4678312B2 (en) * | 2005-11-08 | 2011-04-27 | トヨタ自動車株式会社 | Press failure determination method, press failure determination device, and press forming apparatus |
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| Publication number | Publication date |
|---|---|
| JP4299491B2 (en) | 2009-07-22 |
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