EP3115190B1 - Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse - Google Patents

Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse Download PDF

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Publication number
EP3115190B1
EP3115190B1 EP15002015.4A EP15002015A EP3115190B1 EP 3115190 B1 EP3115190 B1 EP 3115190B1 EP 15002015 A EP15002015 A EP 15002015A EP 3115190 B1 EP3115190 B1 EP 3115190B1
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EP
European Patent Office
Prior art keywords
pressure
stroke
piston
valve
way
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.)
Active
Application number
EP15002015.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3115190A1 (de
Inventor
Hans-Ruedi Honegger
Andreas Dipl.-Ing. Walther
Alex Wehrli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Feintool International Holding AG
Original Assignee
Feintool International Holding AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Feintool International Holding AG filed Critical Feintool International Holding AG
Priority to EP15002015.4A priority Critical patent/EP3115190B1/de
Priority to ES15002015T priority patent/ES2839073T3/es
Priority to CN201610524423.2A priority patent/CN106335210B/zh
Priority to JP2016133066A priority patent/JP6781579B2/ja
Priority to KR1020160084633A priority patent/KR102349812B1/ko
Priority to US15/203,463 priority patent/US10479040B2/en
Publication of EP3115190A1 publication Critical patent/EP3115190A1/de
Application granted granted Critical
Publication of EP3115190B1 publication Critical patent/EP3115190B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/161—Control arrangements for fluid-driven presses controlling the ram speed and ram pressure, e.g. fast approach speed at low pressure, low pressing speed at high pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/163—Control arrangements for fluid-driven presses for accumulator-driven presses

Definitions

  • the invention relates to a hydraulically driven fineblanking press, with a main cylinder arranged in the base, in which the main piston / ram, which can be acted upon by hydraulic fluid via pressure chambers, executes a stroke movement between BDC and TDC in the direction of the stroke axis and carries a table top, is guided, with high-speed stroke cylinders Pressure chambers can be acted upon with hydraulic fluid, double-acting quick stroke pistons with piston rods for the rapid traverse / tactile stroke of the main piston and table top and with a hydraulic system comprising at least one hydraulic pump unit for supplying the pressure chambers with the hydraulic fluid set to a predetermined working pressure by a central controller, the main piston having working surfaces protruding like a disc , which in the master cylinder chamber, one above the other, divide the first (upper) and second (lower) pressure chamber with a small stroke, to which the first (upper) one connected to the hydraulic system Fluid channels and second (lower) fluid channels are assigned in the foot piece, the first fluid channels
  • the invention also relates to a method for controlling a hydraulically driven fineblanking press with a main piston guided in a main cylinder of the foot piece, carrying a table top, which executes a stroke movement between BDC and TDC, in which the main piston with table top is actuated by pressurizing the pressure chambers of a quick lift piston arranged in the quick lift cylinder Rapid traverse / tactile stroke is moved between BDC and OT or OT and UT, then the rapid traverse / tactile stroke is ended and then the main piston performs the cutting or forming operation in the power stroke, the pressure chambers of the main piston being generated by a hydraulic pump unit specified by a central control Working pressure of a hydraulic fluid from a hydraulic system can be applied.
  • the fineblanking process requires special triple-action presses, which basically work from bottom to top and enable controlled control of the cutting process with the auxiliary functions for the ring spike, counter holder and ejector.
  • the serrated ring force and the counter holding force are generated hydraulically and the cutting force is generated mechanically or hydraulically.
  • a method for controlling the drive, in particular of a hydraulic press for reshaping and / or cutting sheet metal, with at least one piston-cylinder unit that can be acted upon from both sides for driving a press ram is known.
  • This press works in the direction of gravity, ie from top to bottom.
  • the upper and lower cylinder chambers of the piston-cylinder unit are connected via a valve device.
  • a motor / pump device with a volume-controllable hydraulic motor / pump device is provided, which is driven at least via a chargeable storage system and whose controllable torque can be fed to a controllable pump device.
  • the DE 10 2012 006 981 A1 discloses a hydraulic press with a ram which is adjustable by means of a hydraulic drive device, the hydraulic drive device having a working cylinder in which a drive piston is slidably received, which divides the interior of the drive cylinder into a first working chamber and a second working chamber, which is connected to a Hydraulic fluid can be acted upon. At least one hydraulic return device is provided in order to bring the ram into its starting position after the forming process.
  • the main piston and the rapid traverse piston belong to separate hydraulic circuits, in which the hydraulic fluid displaced from the working spaces is either transferred to a tank ( DE 10 2009 058 407A1 ) or from the upper working area to the lower working area ( DE 10 2004 006 126 B4 , DE 196 42 635 A1 , DE 102 15 003 A1 , EP 0 891 235 B1 ) be reallocated.
  • the quick-lift cylinders are generally arranged on the head piece of the press and must therefore be able to support the entire upper structure of the press, including the crossbeam, and to lift it during the infeed stroke.
  • the main drive / ram of these known presses is not equipped with any rapid traverse or quick stroke cylinder, so that the cycle time or the achievable number of strokes is correspondingly low.
  • the invention is based on the object of creating a device and a method for controlling the main drive of a hydraulically driven fineblanking press, the hydraulic circuit of which is simplified by eliminating hydraulic lines and reducing the amount of hydraulic fluid while increasing the number of strokes with a simple construction of the press can be.
  • the solution according to the invention is based on the knowledge that the hydraulic fluid in the pressure chambers of the main piston is displaced from one pressure chamber into the other pressure chamber of the main piston during the rapid traverse / tactile stroke when the rapid stroke piston is advanced in the stroke direction.
  • the main piston has working surfaces protruding like a disc, which, lying one above the other in the main cylinder chamber, divide the first (upper) and second (lower) pressure chamber with a small stroke, to which the first (upper) fluid channels and second (lower) fluid channels connected to the hydraulic system Fluid channels are assigned in the foot piece, the first fluid channels being connected to the second fluid channels by a bypass channel each arranged in the foot piece, which forms an internal hydraulic system with these channels and the pressure chambers, which in rapid traverse through pressure-controlled proportional valves when displacing the hydraulic fluid from the first is opened in the second pressure chamber and closed in the power stroke, and that during the power stroke at least one second fluid channel is a power stroke channel and the first pressure chamber is connected to a relief channel, this fluid channel for supplying hydraulic fluid with a predetermined pressure in the second
  • the pressure chamber with a supply channel and branch channel and the relief channel for discharging the hydraulic fluid displaced from the first pressure chamber are connected to a collecting tank via a tank valve.
  • the second pressure chamber of the main piston during the power stroke is connected to the hydraulic pump unit via a safety valve, at least one pressure sensor for pressure detection, at least one pressure limiting valve for limiting the pressure of the delivery flow and a proportional valve for adjusting the delivery rate.
  • the main piston can have the same or differently sized working surfaces, so that both synchronous pistons and other pistons can be used depending on the application.
  • proportional valves and the tank valve are pressure-controlled built-in valves.
  • a further preferred embodiment of the device according to the invention provides that the quick-lift piston divides pressure spaces in the quick-lift cylinder with active areas of different sizes, which are connected to the hydraulic system via channels arranged in the foot piece, the pressure space with the larger effective area in a hydraulic line consisting of an unlockable check valve 3-way proportional valve, controllable proportional valve and high-pressure accumulator are integrated and the pressure chamber with the smaller effective area is connected to the collecting tank via the 4/3-way proportional valve.
  • the different large effective areas on the quick lift piston make it possible to execute the rapid traverse in the upward and downward direction at different speeds.
  • the larger effective area of the quick lift piston is assigned to the upward movement.
  • the quick-lift cylinders are closed pressure-tight on the top of the base with a cover each, so that easy assembly and access is guaranteed.
  • the main piston is assigned a displacement measuring unit for detecting the TDC position of the main piston and the tank valve is assigned to the first pressure chamber of the main piston to build up a counterforce to reduce the cutting impact.
  • the hydraulic pump unit comprises at least one proportional valve for adjusting the flow rate, at least one pressure sensor for controlling the proportional valve and at least one pressure limiting valve for limiting pressure and maintaining the flow rate.
  • the object of the invention is further achieved by a method in that the pressure chambers of the quick stroke piston are fed during rapid traverse / tactile stroke from a high-pressure accumulator permanently tensioned to working pressure and at the same time the pressure chambers of the main piston are separated from the hydraulic system and connected via fluid channels and bypass channels, so that the Hydraulic fluid is displaced from the first pressure chamber in the second pressure chamber in the stroke direction of the rapid lift piston during the rapid traverse almost without pressure.
  • the working pressure in the lower pressure chamber of the main piston during the power stroke is measured with the central control via a controllable proportional valve, at least one pressure sensor for pressure detection, at least one pressure relief valve for limiting the pressure of the delivery flow and a proportional valve for the delivery volume and the hydraulic pump unit and the working pressure in the first pressure chamber are set via the proportional valve.
  • the TDC position of the main piston is set via a distance measuring system with the central controller, the delivery volume of the hydraulic pump unit being reduced before TDC is reached or a counter pressure is generated with the tank valve in the first pressure chamber.
  • the Fig. 1 shows a perspective view of a hydraulically driven fine blanking press 1, the main piston 2 of which basically executes a lifting movement between a bottom dead center UT and an upper dead center OT in the direction of the lifting axis HU from bottom to top.
  • the Press frame 3 of press 1 comprises a head piece 4, a foot piece 5, box-shaped hollow columns 6 and tie rods 7.
  • a table top 8 is arranged on the top OS of the foot piece 5, which supports the lower tool part, not shown further.
  • the rapid lift piston 10 has a piston rod 12 which is guided through the cover 11 and which is connected to a carrier 13 which is fastened to a side wall 14 of the table top 8.
  • the quick lift piston 10 divides a first and second pressure chamber 15a and 15b in the quick lift cylinder 9 (see also Fig. 3 ) from.
  • the pressure chamber 15a and the pressure chamber 15b are each connected to the hydraulic line 17 of the hydraulic system 18 via a channel 16a or 16b made in the foot piece 5 for applying hydraulic fluid to a predetermined pressure, so that it is possible to move the table top 8 in rapid traverse towards the head piece 4 to move vertically.
  • the Figure 4a , 4b and 5 show the spatial position of the fluid channels 24a to 24h and the relief channel 29 in the foot piece 5 in a transparent representation and in section along the line BB of FIG Fig. 2 .
  • a main cylinder chamber 19 is formed in the foot piece 5, the axis HA of which lies on the stroke axis HU of the fineblanking press and accommodates the double-acting main piston 20.
  • the main piston 20 has a cylindrical shaft 21, which has working surfaces 22a and 22b projecting like a disc like a disc at right angles to the axis HA, which divides the main cylinder chamber 19 into a first (upper) pressure chamber 23a and a second (lower) pressure chamber 23b with a low stroke height, so that the Foot piece 5 is compact and has a low overall height.
  • the master cylinder chamber 19 and thus the pressure chamber 23a are closed in a pressure-tight manner by a cover 27 which is fastened to the foot piece 5.
  • the fluid channels 24a to 24d are connected to the fluid channels 24e to 24h by a bypass channel 26 each.
  • a pressure-controlled proportional valve 25a, 25b, 25c and 25d is used as a built-in valve in each of the second (lower) fluid channels 24e to 24h, which valve closes the respective bypass channel 26 when the second pressure chamber 23b with hydraulic fluid of a predetermined pressure from the hydraulic system 18 is applied.
  • the main piston 20 executes a corresponding stroke movement between bottom dead center UT and top dead center OT and, when the proportional valve 25a to 25d is open, displaces the hydraulic fluid in the first (upper) pressure chamber 23a via the first (upper) fluid channels 24a to 24d, the bypass channels 26 and the second (lower) fluid channels 24e to 24h in the second (lower) pressure chamber 23b.
  • the first (upper) pressure chamber 23a, the first (upper) fluid channels 24a to 24d, the bypass channels 26, the lower fluid channels 24e to 24h and the second (lower) pressure chamber 24b thus form a closed hydraulic system which, depending on the position of the proportional valves 25a to 25d can be opened or closed so that the first (upper) pressure chamber 23a and second (lower) pressure chamber 23b are almost pressureless and the hydraulic fluid is displaced into the second (lower) pressure chamber 23b of the main piston 20 as well as a fluid column in the direction of movement BR of the Schnellhubkolben 10 can be built up during the rapid traverse.
  • the Fig. 6 shows the foot piece 5 in a further section along line CC of Fig. 2 , which shows the position of the fluid channel 24e and the relief channel 29 (see also Figure 4a ) clarified.
  • the relief channel 29 opens into the first pressure chamber 23a of the main piston 20 and the fluid channel 24e opens into the second pressure chamber 23b, which are arranged one above the other perpendicular to the stroke axis HU according to the height of the pressure chambers 23a and 23b.
  • a tank valve 30 for opening and closing the relief channel 29 is inserted into the relief channel 29 as a built-in valve which is in the open position when the hydraulic fluid in the pressure chamber 23a is displaced to the collecting tank 44 in the power stroke.
  • the fluid channel 24e is connected to a feed channel 32 lying parallel to the stroke axis HU in the foot piece 5 and to a branch channel 33 which branches off from this and via which the hydraulic system 18, not shown further, is connected.
  • the main piston 20 with the table top 8 executes a stroke in the direction TDC through the quick lift piston 10.
  • the hydraulic fluid located in the first (upper) pressure chamber 23a is removed by the upward movement of the working surface 22a of the main piston 20 when the tank valve 30 is closed
  • the first (upper) pressure chamber 23a is displaced and, when the proportional valve 25a is open, it reaches the lower pressure chamber 23b via the first fluid channel 24a, the bypass channel 26, the second fluid channel 24e.
  • the displacement is indicated by an arrow in the Figure 7b marked.
  • the proportional valve 25a closes, the proportional valve 30 opens and the power stroke begins.
  • Fig. 8 shows the hydraulic line 41 for the rapid traverse and the hydraulic line 42 for the power stroke of the main piston 20.
  • the hydraulic line 41 includes a high pressure accumulator 34 for hydraulic fluid, a logical proportional valve 36 controlled by the central controller 35, which is connected to the hydraulic system 18 via the hydraulic line 17 and adjusts the pressure level in the high pressure accumulator 34, a pressure sensor 38, a safety valve 39, a 4 / 3-way proportional valve 37, which switches the hydraulic fluid on or off according to the position of the quick lift piston 10 in the quick lift cylinder 9 to the pressure chambers 15a or 15b, a releasable check valve 43 assigned to the lower pressure chamber 15b and the pressure chambers 15a and 15b of the quick lift piston 10.
  • the pressure chambers 15a and 15b of the quick lift piston 10 are supplied with a pressure corresponding to hydraulic fluid via the common high-pressure accumulator 34, which pressure is set by the central controller 35 as an accumulator charge by a corresponding control of the valve 36.
  • the proportional valve 25a built into the fluid channel 24e closes, the tank valve 30 opens and the 4/3-way proportional valve 37 switches to a central position.
  • the fluid channel 24e then assumes the function of a power stroke channel in which hydraulic fluid is supplied to a predetermined pressure into the second pressure chamber 23b.
  • the hydraulic line 42 for the power stroke comprises a hydraulic pump unit 40 which has at least one proportional valve 45 for adjusting the delivery rate, at least one pressure limiting valve 46 for limiting the pressure of the delivery flow and at least one pressure sensor 47 for pressure detection for limiting the output and forwarding the pressure value to the central controller 35 for control of the pressure relief valve 46 is assigned, a safety valve 48 which switches the hydraulic fluid fed into the lower pressure chamber 23b on or off, a pressure sensor 49 for determining the pressure value which is used to control the Pressure limiting valve 46 is transferred to the central control, and the pressure chambers 23a and 23b of the main piston 20.
  • the power stroke is ended.
  • the safety valve 48 for the power stroke and the tank valve 30 close, at the same time the proportional valve 25a for the fluid channel 24e and the proportional valve 37 for the supply of hydraulic fluid from the high-pressure accumulator 34 open, and the rapid traverse begins in which the upper pressure chamber 15a of the quick-lift piston 10 is filled with hydraulic fluid predetermined pressure is applied, so that the main piston 20 is lowered together with the table top 8 and reaches its lower target position.
  • the 4/3-way proportional valve 37 switches over, so that hydraulic fluid can be applied to the lower pressure chamber 15b and the quick-lift piston 10 is moved in the direction of its upper target position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Presses (AREA)
  • Punching Or Piercing (AREA)
  • Press Drives And Press Lines (AREA)
  • Fluid-Pressure Circuits (AREA)
EP15002015.4A 2015-07-06 2015-07-06 Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse Active EP3115190B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP15002015.4A EP3115190B1 (de) 2015-07-06 2015-07-06 Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse
ES15002015T ES2839073T3 (es) 2015-07-06 2015-07-06 Dispositivo y procedimiento para el control del accionamiento principal de una prensa troqueladora de precisión
CN201610524423.2A CN106335210B (zh) 2015-07-06 2016-07-05 用于驱控精冲压机的主驱动装置的装置和方法
JP2016133066A JP6781579B2 (ja) 2015-07-06 2016-07-05 精密打抜プレスの主駆動部の制御の為の装置及び方法
KR1020160084633A KR102349812B1 (ko) 2015-07-06 2016-07-05 미세 블랭킹 프레스의 1차 드라이브를 제어하기 위한 장치 및 방법
US15/203,463 US10479040B2 (en) 2015-07-06 2016-07-06 Device and method for controlling the primary drive of a fine blanking press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15002015.4A EP3115190B1 (de) 2015-07-06 2015-07-06 Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse

Publications (2)

Publication Number Publication Date
EP3115190A1 EP3115190A1 (de) 2017-01-11
EP3115190B1 true EP3115190B1 (de) 2020-11-18

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EP15002015.4A Active EP3115190B1 (de) 2015-07-06 2015-07-06 Vorrichtung und verfahren zum steuern des hauptantriebs einer feinschneidpresse

Country Status (6)

Country Link
US (1) US10479040B2 (https=)
EP (1) EP3115190B1 (https=)
JP (1) JP6781579B2 (https=)
KR (1) KR102349812B1 (https=)
CN (1) CN106335210B (https=)
ES (1) ES2839073T3 (https=)

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CN112589707A (zh) * 2020-12-15 2021-04-02 芜湖科捷铝业科技有限公司 一种便于调节的门窗铝型材加工工装
DE102021001805A1 (de) * 2021-04-08 2022-10-13 Weinig Dimter Gmbh & Co. Kg Pressvorrichtung zum Pressen von Werkstücken aus Holz, Kunststoff, Metall und dergleichen
CN117301603A (zh) * 2023-09-26 2023-12-29 合肥海德数控液压设备有限公司 高精度四角动平行压药液压机
CN119795651A (zh) * 2025-03-13 2025-04-11 合肥合锻智能制造股份有限公司 一种双极板液压机及控制系统

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Also Published As

Publication number Publication date
CN106335210A (zh) 2017-01-18
US10479040B2 (en) 2019-11-19
KR20170005768A (ko) 2017-01-16
EP3115190A1 (de) 2017-01-11
KR102349812B1 (ko) 2022-01-11
JP2017013133A (ja) 2017-01-19
JP6781579B2 (ja) 2020-11-04
CN106335210B (zh) 2019-06-21
ES2839073T3 (es) 2021-07-05
US20170120551A1 (en) 2017-05-04

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