公开(公告)号：EP0849070B1

公开(公告)日：2005-05-18

申请号：EP97908494.4

申请日：1997-03-18

申请人： NITTO KOHKI CO., LTD.

发明人： SHIMADA, Keisuke ,  SHOJI, Michihiro

IPC分类号： B30B15/18 ,  B30B1/32 ,  B21D28/20

CPC分类号： F15B21/087 ,  B30B15/16

摘要： When a start switch (SW3) is depressed, a one-shot multivibrator circuit (15) is actuated to output one pulse. When the pulse enters a self-holding circuit (16), the self-holding circuit (16) is self-held to output an H-level signal until reset. As a result, a transistor (17) is turned on to actuate a relay (R1) for lowering a ram. When the ram reaches the lower limit position, a lower limit switch (LS4) is opened, so that a signal from a one-shot multivibrator circuit (18) causes a self holding circuit (21) to self-hold an H-level signal. The signal is delayed by a delay circuit (22) to turn a transistor (23) on. Therefore, a relay (R2) for raising the ram is actuated. Restarting will not be effected due to the operation of the one-shot multivibrator circuit (15) even when the start switch is kept depressed. Also, the service life of a valve changeover mechanism can be extended owing to the operation of the delay circuit (22). Further, erroneous operations can be prevented by operations of a delay circuit (19) and an AND circuit (24) even when the lower limit switch (LS4) chatters.

公开(公告)号：EP1138958A3

公开(公告)日：2004-01-14

申请号：EP01105486.3

申请日：2001-03-14

申请人： Euromac S.r.l.

发明人： Ostini, Giorgio

IPC分类号： F15B19/00 ,  F15B15/24 ,  B30B15/18 ,  F15B9/10

CPC分类号： B21D28/20 ,  B21D28/00 ,  F15B19/00

摘要： A fluid-operated circuit for setting the top dead center (TDC) and the bottom dead center (BDC) of the punch actuation cylinder (1) in punching machines comprises a first copying distributor (5) which distributes pressurized fluid, which has a spool (5a) at one end and can be connected in output to the upper section (2a) of the chamber (2) in which the actuation cylinder (1) slides and in input to a first pump (8) for feeding low-pressure fluid and to at least one first fast-acting electric valve element (6); the spool (5a) can be pushed into position by contact by a corresponding setting element (4) with continuous micrometric movement.

公开(公告)号：EP0769336B1

公开(公告)日：2003-01-29

申请号：EP95924520.0

申请日：1995-07-07

申请人： AMADA COMPANY, LIMITED

发明人： KOYAMA, Junichi

IPC分类号： B21D5/02 ,  G05B19/404 ,  B30B15/18

CPC分类号： B21D5/02 ,  B21D5/004 ,  G05B19/404 ,  G05B2219/37205 ,  G05B2219/37357 ,  G05B2219/37403 ,  G05B2219/45143 ,  G05B2219/50063

摘要： A press brake is provided for bending a work accurately. An engagement position relationship between upper and lower molds is controlled based on a D value indicating a theoretical engagement position relationship between upper and lower molds which correspond to a target bending angle for actually bending a work, a theoretical machine deflection is calculated based on a theoretical load for performing bending to an average value for bending angles, an actual machine deflection is calculated based on an actual pressure by a hydraulic cylinder and a correction amount of the D value is calculated based on the difference between the theoretical machine deflection and the actual machine deflection. In addition, not only the bending angle accuracy relative to various bending conditions is to be improved but also the number of corrections is to be reduced. A device for calculating a distance D value comprises input means for enabling the input of work material, tensile strength, plate thickness and so forth, work winding judging means, spring back amount calculating means, an air bend, bottoming judging means, work holding angle calculating means, means for calculating a pressuring force when a work is held, and table travelling value calculating means.

公开(公告)号：EP0549793A1

公开(公告)日：1993-07-07

申请号：EP91913072.4

申请日：1991-07-18

申请人： Aida Engineering Ltd.

发明人： UEHARA, Tadayoshi ,  SUZUKI, Toshio

IPC分类号： B21J5/06 ,  B30B1/32 ,  B30B15/18 ,  B21J9/20 ,  B21J9/12

CPC分类号： B21J9/12 ,  B21J9/20 ,  B30B15/18 ,  B30B15/20

摘要： A method of plastic forming in which a blank in the die undergoes plastic deformation with the advance of a punch whose moving speed is controllable. Deformation of the die incurred by am impact caused when the punch strikes the die is prevented by slow advance of the punch until the die touches the blank. When the punch comes into contact with the die, the pressure to move the punch forward, while interfering with the advance of the punch, is raised to a limit at which plastic deformation occurs. The advance speed of the punch is controlled so that, with release of the pressure having interrupted the advance of the punch, distortion speed of the blank may be made substantially uniform almost throughout the area subjected to plastic forming. Uniform stress acting on the die as a result of uniformized distortion speed of the blank leads to a uniform amount of deformation of the die almost throughout area subjected to plastic forming, whereby lowering of precision in forming caused by fluctuations in the deformation amount of the die is prevented. With the pressure of ejecting means made relatively higher than that of the punch at the time of ejection, spring-back of the die is prevented by ejection of the blank under pressure.

摘要翻译： 一种塑料成型方法，其中模具中的坯件随着冲击器的前进而发生塑性变形，其移动速度是可控制的。 通过冲头的缓慢推进，直到模具接触坯料，防止冲头撞击模具时产生的冲击引起的模具变形。 当冲头与模具接触时，将冲头向前移动同时妨碍冲头的前进的压力升高到发生塑性变形的极限。 控制冲头的前进速度，使得随着压力的释放中断冲头的进行，坯料的变形速度几乎可以在整个塑性成形区域内基本上均匀。 由于坯料均匀化的变形速度，作用在模具上的均匀的应力导致几乎整个塑性成形区域的模具的均匀变形量，从而降低由模具的变形量的波动引起的成形精度 被阻止 由于喷射装置的压力在喷射时相对高于冲头的压力，所以通过在压力下弹出坯料来防止模具的回弹。

公开(公告)号：EP0284903B1

公开(公告)日：1993-06-02

申请号：EP88104222.0

申请日：1988-03-17

申请人： GEBR. SCHMIDT FABRIK FUR FEINMECHANIK

发明人： Schmidt, Rolf

IPC分类号： B30B15/18 ,  B30B15/26

CPC分类号： B30B15/18 ,  B30B15/26

公开(公告)号：EP0339832B1

公开(公告)日：1992-11-11

申请号：EP89303647.5

申请日：1989-04-12

申请人： BRITISH UNITED SHOE MACHINERY LIMITED ,  DEUTSCHE VEREINIGTE SCHUHMASCHINEN GmbH ,  DVSG Patentverwaltungs G.m.b.H.

发明人： Berny, Hans-Jürgen ,  Bergstrasser, Werner

IPC分类号： B30B15/18

CPC分类号： B26D7/26 ,  B30B15/166 ,  B30B15/18

公开(公告)号：EP0243407B1

公开(公告)日：1991-07-31

申请号：EP86906229.9

申请日：1986-10-20

申请人： UNIVERSAL ENGINEERING DEVELOPMENT CO. PTY. LTD.

发明人： SPICER, Andrew, Ian

IPC分类号： B30B15/18 ,  B30B1/36

CPC分类号： B21D28/002 ,  B30B15/161 ,  Y10T83/141 ,  Y10T83/148 ,  Y10T83/2153 ,  Y10T83/8696 ,  Y10T83/8726 ,  Y10T83/8824 ,  Y10T83/8827 ,  Y10T83/886

摘要： An improved punch assembly (10) for a punch press comprises a main piston (13) driving a punching tool (11) and an auxiliary piston (17) which can be selectively enabled to cooperate with the main piston (13) in a high force, slow speed mode or disabled to allow the main piston (13) to operate alone in a low force high speed mode. The punch assembly (10) also comprises a pressure transducer (41) and position transducer (25) whose respective outputs are connected to a microprocessor controller for the punch assembly. Operation of the punch press is microprocessor controlled to reduce noise and punch cycle time. A stripper assembly (42-48) is also provided and operates in conjunction with the punching tool (11) under microprocessor control to facilitate tool stripping. The stripper assembly (42-48) can also be used for automatic measuring of work sheet thickness.

摘要翻译： PCT No.PCT / AU86 / 00312 Sec。 371日期1985年10月17日第 102（e）日期1985年10月17日PCT提交1986年10月20日PCT公布。 公开号WO87 / 02309 日本1987年4月23日。用于冲压机的改进的冲头组件（10）包括驱动冲压工具（11）的主活塞（13）和辅助活塞（17），所述主活塞能够选择性地能够与主阀组合 （13）在高力，慢速模式或禁用以允许主pisto1（13）在低力高速模式下单独操作。 冲头组件（10）还包括压力换能器（41）和位置传感器（25），其各自的输出连接到用于冲头组件的微处理器控制器。 冲压机的操作由微处理器控制，以减少噪音和冲压周期。 还提供了汽提器组件（42-48），并且在微处理器控制下与冲压工具（11）一起操作以便于工具剥离。 剥离器组件（42-48）也可用于工件厚度的自动测量。

公开(公告)号：EP0284903A3

公开(公告)日：1989-09-20

申请号：EP88104222.0

申请日：1988-03-17

申请人： GEBR. SCHMIDT FABRIK FUR FEINMECHANIK

发明人： Schmidt, Rolf

IPC分类号： B30B15/18 ,  B30B15/26

CPC分类号： B30B15/18 ,  B30B15/26

摘要： Eine Kolbenpresse (10) weist einen Stößel (17) auf, der mit einem in einem Zylinder (15) laufenden Kolben (16) verbunden ist. Der Zylinder (15) ist über Ventile (42, 45) mit Druckluft beaufschlagbar. Um Preßaufgaben mit geregeltem Weg/Zeit-Verlauf vornehmen zu können und eine ohne großen Installationsaufwand zu betreibende Kolbenpresse zur Verfügung zu haben, wirkt der Stößel (17) mit einem Wegmeßsystem (18) zusammen. Ein Ausgangssignal (s) des Wegmeßsystems (18) wird in einem Regler (37) mit vorgegebenen Sollwerten (s₀, s₁, s₂, s₃) verglichen. Der Regler (37) steuert elektropneumatische Servoventile (42, 45) zur Druckbeaufschla­gung des Zylinders (15) nach einem vorgegebenen Weg/Zeit-Verlauf (s (t) ) an (Fig. 1).

公开(公告)号：EP0316519A1

公开(公告)日：1989-05-24

申请号：EP88113357.3

申请日：1988-08-17

申请人： S + S ELEKTRONIK GERÄTEBAU GMBH

发明人： Frisch, Helmuth ,  Hartinger, Johann ,  Weber, Alois

IPC分类号： B30B15/18

CPC分类号： B30B15/0041 ,  Y10T83/141

摘要： Es wird ein Verfahren zur Messung und Korrektur der Stößelverstellung bei schnellaufenden Hub­pressen beschrieben. Die hierbei verwendeten Stößel dienen zum Schneiden, Stanzen, Biegen- und/oder Prägen von Halbzeugen oder dergleichen mit hohen Toleranzanforderungen. Der Stößel ist in Abhängig­keit von der Hubzahl nachzustellen und der jeweils tatsächliche Wert der Eintauchtiefe des Stößels wird gemessen. Hierzu dient ein mehrere Induktions­schleifen aufweisender Detektorkopf (4), der mit dem Stößelhub entlang eines Permanentmagnetstreifens (1) geführt wird, der in seiner Längsausdehenung in einer Vielzahl sich abwechselnder Nord-Süd-Pole unterteilt ist. Der induzierte Spannungsverlauf wird über Cosinus- und Sinusfunktionen der Induktions­schleifen für jede vorgegebene Weglängeneinheit abgegriffen und die Amplituden beider Funktionen am Umkehrpunkt gemessen und ausgewertet, und zwar der­gestalt, daß die eine der Amplituden bzw. das der am Umkehrpunkt gemessenen Amplitude benachbarte Maximum als Referenzspannung dient und die andere Amplitude den Meßwert vorgibt.

摘要翻译： 此处使用的公羊服务为切割，冲压，弯曲和/或半成品的冲压或类似的具有高的公差要求。 作为笔画的数目和在每种情况下为所述冲头的浸入深度的实际值的函数被测量应调整的RAM。 为了这个目的，利用了一个检测器头部（4），其具有感应环的多个部分并加以引导沿着永磁体条带（1）在其纵向范围被划分成大量的交替的北极的冲头冲程的 -South极。 感应电压特性被取出用于经由感应环的余弦和正弦函数的位移长度的每个预定单元，和两个函数的幅度被测量和评估在转折点，更确切地说在寻求一种方法所做的一个 振幅或最大邻接在转折点所测量的振幅作为参考电压，而另一个振幅给出的测量值。 ... ...

公开(公告)号：EP0243407A4

公开(公告)日：1989-03-22

申请号：EP86906229

申请日：1986-10-20

申请人： UNIVERSAL ENG DEV

发明人： SPICER ANDREW IAN

IPC分类号： B30B1/36 ,  B21D28/00 ,  B30B15/00 ,  B30B15/16 ,  B30B15/18

CPC分类号： B21D28/002 ,  B30B15/161 ,  Y10T83/141 ,  Y10T83/148 ,  Y10T83/2153 ,  Y10T83/8696 ,  Y10T83/8726 ,  Y10T83/8824 ,  Y10T83/8827 ,  Y10T83/886

摘要： An improved punch assembly (10) for a punch press comprises a main piston (13) driving a punching tool (11) and an auxiliary piston (17) which can be selectively enabled to cooperate with the main piston (13) in a high force, slow speed mode or disabled to allow the main piston (13) to operate alone in a low force high speed mode. The punch assembly (10) also comprises a pressure transducer (41) and position transducer (25) whose respective outputs are connected to a microprocessor controller for the punch assembly. Operation of the punch press is microprocessor controlled to reduce noise and punch cycle time. A stripper assembly (42-48) is also provided and operates in conjunction with the punching tool (11) under microprocessor control to facilitate tool stripping. The stripper assembly (42-48) can also be used for automatic measuring of work sheet thickness.