EP2804751B1 - Verwendung von daten des kraftflusses in einer presse für den betrieb eines stössels - Google Patents

Verwendung von daten des kraftflusses in einer presse für den betrieb eines stössels Download PDF

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Publication number
EP2804751B1
EP2804751B1 EP13709147.6A EP13709147A EP2804751B1 EP 2804751 B1 EP2804751 B1 EP 2804751B1 EP 13709147 A EP13709147 A EP 13709147A EP 2804751 B1 EP2804751 B1 EP 2804751B1
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EP
European Patent Office
Prior art keywords
plunger
inclination
press
data
tool part
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
EP13709147.6A
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German (de)
English (en)
French (fr)
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EP2804751A1 (de
Inventor
Thomas Spiesshofer
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L Schuler GmbH
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L Schuler GmbH
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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
    • B30B15/165—Control arrangements for fluid-driven presses for pneumatically-hydraulically driven presses
    • 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
    • B30B1/26—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 cams, eccentrics, or cranks
    • B30B1/28—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 cams, eccentrics, or cranks the cam, crank, or eccentric being disposed below the lower platen or table and operating to pull down the upper platen or slide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • 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
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam

Definitions

  • the invention relates to the use of data of the power flow in a press for the operation of a plunger, wherein the press at least one connected via at least one drive train, a force generating drive means, at least one hub exporting and force transmitting, at least one tool upper part receiving plunger and comprises at least one of the plunger and the corresponding tool upper part associated lower tool part, and between the lower tool part and the upper tool part, a workpiece or material is machined or deformed.
  • Such presses are known as versions with upper drive or lower drive for the plunger.
  • the respective element of the drive train connected to and operating the ram may be designed as a drawbar / Werneruel in a sub-drive or as a threaded spindle or directly a force-generating element such as piston / cylinder unit.
  • Presses - both with top drive and with bottom drive - should, however, be designed so that they ensure an optimized force and travel path of the ram and its stroke and can act differentiated according to the processing requirements. From normal positions deviating positions of individual machine elements as well as the plunger should include as far as possible the construction system or balance in order to avoid on the one hand complex designs of the plunger guide and on the other hand to ensure the machining process.
  • This invention aims solely to compensate for the inclination of the plunger so that a largely parallel to the press table plunger movement can be guaranteed.
  • the invention assumes that all these expenses and facilities, such as guiding and protection devices can be dispensed with, if the desired parallel movement of the plunger can be ensured by controlled and regulated drive motors. In the event of malfunction oblique or inclined positions of the plunger, these should also be allowed, for which solutions in this regard were not covered by the development directions taken so far and thus factually excluded.
  • the core idea was to combine the principle of a guide shaft-controlled electronic cam control with the force control so that depending on the operating mode, the movement phases of the plunger are controlled on the one hand via electronic position cam discs and on the other hand via a force control or force limitation to control the plunger movement.
  • a tilt control of the individual pressure points should also use the generation of a desired tilting of the plunger in addition to the compensation of occurring at eccentric load different suspension of all lying in the power flow drive elements, but this position control was done with the position cam and a position offset.
  • a misalignment of the plunger in the upper reversal point is to be avoided during the 360 ° circulation mode according to a second embodiment in that the area of the upper reversal point is passed through in the cycle with symmetrical position adjustment and the asymmetric position adjustment after the upper reversal point before the following load phase is reactivated.
  • control of the tilt of the plunger should be such that detected during the load phase in the area before the lower reversal point, the position of the plunger or upper tool with respect to tilt and deviation of the lower reversal point by means of a plunger position measuring device and within a control loop the tilting position and if necessary, the immersion depth is influenced.
  • the immersion depth of the plunger is to be controlled.
  • the expected deviations of the lower reversal position of the plunger or tool depending on influencing variables, such as duration-related temperature changes and stroke rates are stored in the controller taking into account a machine-specific model.
  • the behavior of the local press is influenced in relation to a predetermined virtual guide shaft, with the individual servomotors being to be influenced in their deviation from the predetermined guide shaft position.
  • various preparation phases are required, which must be laborious to make a corresponding adjustment of the machine.
  • main drive is assigned a cam control with separate electronic cams for each drive.
  • the invention is based on the object, one in the types described above of presses, i. both with top drive and with sub-drive with asymmetrically occurring pressing forces as well as Ziehkissen adoptedn to allow an unwanted as resulting from malfunctioning tilt of the plunger or counteract this or a deliberate inclination of the plunger foundedstuern with structural elements, what data of the power flow in a press for the operation of the plunger are to be used without using elaborate protective mechanisms.
  • the invention proceeds from the operation of Hooke's Law in the construction system of a press. Accordingly, an oblique position of the plunger generates due to off-center forces different loads of the parts in the power flow, which stretch according to the Hooke's law depending on the force acting or rebound or move or move.
  • the formation of the tension element as a tie rod or pull spindle and according to claim 4, the formation of the pressure element as a connecting rod or spindle or piston / cylinder unit.
  • force or motion detecting element For receiving the data of an expansion or rebound or movement underlying parts according to claim 8 at least one arranged in at least part of the press, force or motion detecting element is provided, which preferably in the force or motion sensitive areas of expansion or rebound or articular variable mounting of the tension element or pressure element attached and as a piezoelectric element, strain gauges o.ä. acting element is executed.
  • the data determined by the second means or third means and the data of the data determined by the first means of the position of the plunger can be so controlled / regulated in process operation as the desired force curve / force balance adjusts.
  • the determined data of the position of the plunger can also be specified according to claim 11, after which the desired force curve / force compensation is set.
  • the reference variables from the determined data of the force flow of the parts involved or the forming forces and the reference variables from the determined data of the position of the plunger can advantageously be changed according to claim 12 during the process operation.
  • the data resulting from the respectively changing forces or positions of the plunger during the process are processed by at least one of the first, second and third means.
  • the invention establishes a relationship of the respective drive means to the monitored position of the plunger by means of this data, evaluates this relationship and can influence a tilt of the plunger despite different forces and thus different springing of the components deliberately to the effect that an inclined position of the plunger deliberately approved or counteracted the inclination of the plunger or the inclination of the plunger is controlled in the operation.
  • the invention thus provides both for a targeted or to be admitted as well as for a malfunction resulting from maladjustment of the ram to each of the process useful solution.
  • the invention is applicable to both top-drive presses and bottom-press presses, and as "quasi-sensory means" for receiving data from parts involved in the force flow, those parts can be determined which are preferably flow-relevant, component-sensitive areas such as e.g. a pressure or train connection, depending on the upper or lower drive, lie with the plunger.
  • flow-relevant, component-sensitive areas such as e.g. a pressure or train connection, depending on the upper or lower drive, lie with the plunger.
  • the present invention according to the features of claim 1 or claim 2 and the features dependent thereon can be classified with marginal effort such that it is technologically easy to implement.
  • the region of the tie rod connection with the plunger that is used as "quasi-sensory means" tensile / pressure point for the data to be detected with strain gauges or piezo elements.
  • the design according to the invention namely the control and regulating device which safeguards the mechanical construction of the press and the adjustment of asymmetrical pressing forces and also processes the data of the first, second and third means, is likewise in an existing system designed as already proposed integrated.
  • a controlled or regulated process flow in eg forming with the inclusion of at least the first agent or the second agent or the third agent can be adjusted.
  • a relationship is established between the forming forces occurring with the data processed with the second means or the third means and the position of the plunger determined with the first means or the second means.
  • the invention provides a further effect which, in addition to the interaction of the forming forces such as the die cushion forces, also has an advantageous effect on the overall structural complexity of generic presses and in particular on an optimizing design of the hydraulic components when using a die cushion.
  • Fig. 1 shows a press 1 with sub-drive, arranged in a substructure 3 drive means 2 eccentric drive elements 2.1, motors or servomotors 2.2
  • Drawbar 2.3 and connecting rod 2.5 includes.
  • a stroke h between a non-designated top dead center and a non-designated bottom dead center exporting plunger 1.1 has a tool shell 1.2.
  • Two pairs of drawbars 2.3 and Buchpleuel 2.5 as components of a drive train 2.6 engage the plunger 1.1 each in the region of a tensile / pressure point 2.4 for transmitting the drive for the stroke h of the plunger 1.1.
  • the plunger 1.1 with the upper tool part 1.2 corresponds to a arranged on the base 3 lower tool part 3.2, wherein the upper tool part 1.2 acts on a lying on the lower tool part 3.2 workpiece 5 for shaping.
  • the lower tool part 3.2 is arranged on a belonging to the base 3 table 3.1.
  • a control and regulating device 4 is provided whose function corresponds to that in the document WO2012041313 already described system can be designed.
  • About the tie rods 3 and Werpleuel 2.5 are differentiated acting on the workpiece 5 to be formed between the tool upper part 1.2 and workpiece 5 forces acting so that the press 1 permanently after a force required exclusively for the workpiece 5 force system, but still without the invention disclosed use of a train 2.4.1, can be operated.
  • the press 1 operating according to that system takes into account control processes which, on the one hand, can be used for the new inventive approach according to the features disclosed in the claims and, on the other hand, go beyond their effectiveness.
  • the deformations occurring in the construction system of the press 1 as a result of the asymmetrically occurring forces, in interaction with the forming forces involved, an angle of rotation and a spring constant or at least one of these dimensions of at least one machine element of the press 1, is related to its structural rigidity or eccentric element Drive unit 2 encountered force balance due to counteracting, restoring forces (Hooke's Law) initiated.
  • the tension on the tappet 1.1 in the one between tappet 1.1 and pull rod 2.3 changeable position permitting tensile / pressure point 2.4 unstably mounted train 2.4.1 is used, i. that this area is used as a "quasi-sensory remedy" and surprisingly expanded functionally.
  • a second means 4.2 before the data for this desired position of the plunger 1.1, whereby, for example, after hitting the upper tool 1.2 on the lower tool part 3.2 a resulting unequal movement of the two drive trains 2.6 is continued.
  • the upper tool part 1.2 and the lower tool part 3.2 are now closed in parallel, with the unequal Further movement on the spring stiffness of the press 1 asymmetric as unequal acting forces are generated selectively.
  • third means 4.3 provide for the acquisition of force flow data via a force receiving element 2.4.4.
  • the data obtained from the respective forming force are then used as reference variables and the position of the tappet 1.1 is guided in such a way that a desired force curve is established.
  • the gentle balancing of the construction system of the press 1 is balanced or completed.
  • the training of the first, second and third means 4.1, 4.2, 4.3 is subject to the skill of the art and must not be detailed here.
  • the inventive principle is equally applicable to a press not discussed here with top drive, in which the power flow from an overhead drive means via a plunger with a tool upper part to a lower tool part via a pressure connection.
  • the ram with the tool upper part between an upper and a lower dead center in at least one reversing individual stroke or the bottom dead center and the top dead center continuous strokes are placed on the lower tool part placing.
  • the parts involved in the power flow such as connecting rods or spindles, which act at a pressure point on the plunger and are connected in this with the plunger.
  • analogue force-absorbing elements 2.4.4 such as strain gauges or piezoelectric elements or equivalent means, are used to record the force flow data.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
EP13709147.6A 2012-01-16 2013-01-15 Verwendung von daten des kraftflusses in einer presse für den betrieb eines stössels Active EP2804751B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012100325.4A DE102012100325C5 (de) 2012-01-16 2012-01-16 Verwendung von Daten des Kraftflusses in einer Presse für den Betrieb eines Stößels
PCT/DE2013/100008 WO2013107444A1 (de) 2012-01-16 2013-01-15 Verwendung von daten des kraftflusses in einer presse für den betrieb eines stössels

Publications (2)

Publication Number Publication Date
EP2804751A1 EP2804751A1 (de) 2014-11-26
EP2804751B1 true EP2804751B1 (de) 2019-02-27

Family

ID=47882102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13709147.6A Active EP2804751B1 (de) 2012-01-16 2013-01-15 Verwendung von daten des kraftflusses in einer presse für den betrieb eines stössels

Country Status (10)

Country Link
US (1) US10464275B2 (es)
EP (1) EP2804751B1 (es)
KR (1) KR102037544B1 (es)
CN (1) CN104136208B (es)
BR (1) BR112014017480B1 (es)
CA (1) CA2861447C (es)
DE (1) DE102012100325C5 (es)
ES (1) ES2722249T3 (es)
MX (1) MX367462B (es)
WO (1) WO2013107444A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016106286B4 (de) * 2016-04-06 2023-03-02 Schuler Pressen Gmbh Verfahren und Vorrichtung zur Steuerung und Regelung der Stößelbewegung und der Stößelkräfte an Mehrpunkt-Servo-Hybrid-Pressen
CN106608073A (zh) * 2016-12-21 2017-05-03 苏州蓝王机床工具科技有限公司 分体式刚性保险器
EP3825024A1 (en) * 2019-11-25 2021-05-26 Duplo Corporation Punching device and punching method
WO2021118908A1 (en) 2019-12-10 2021-06-17 Barnes Group Inc. Wireless sensor with beacon technology

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT215257B (de) * 1959-02-06 1961-05-25 Georg Achtermann Presse mit Unterantrieb
US3407913A (en) * 1965-08-26 1968-10-29 Aida Iron Works & Co Ltd Safety device in press machine and control device therefor
FR2655907B1 (fr) * 1989-12-19 1993-07-30 Plazenet Jean Presse plieuse hydraulique a tablier inferieur mobile.
DE4118569A1 (de) * 1991-06-06 1992-12-10 Univ Dresden Tech Hydraulischer druckpunkt
JP3231536B2 (ja) 1993-02-25 2001-11-26 トヨタ自動車株式会社 プレス機械の異常診断方法
JP3690534B2 (ja) * 1995-10-25 2005-08-31 株式会社小松製作所 高速液圧プレス
DE19642587A1 (de) * 1996-10-15 1998-04-16 Ulrich Keller Mehrpunktpresse mit hydraulischen Druckkissen und invers einstellbaren Federsteifen der Druckpunkte zur Kompensation der Stößelschrägstellung
TW553063U (en) * 1999-08-03 2003-09-11 Kosmek Kk Device for obtaining calibration data of mechanical press, and load display device for mechanical press
JP3689010B2 (ja) 2001-03-15 2005-08-31 株式会社放電精密加工研究所 プレス機
KR100559432B1 (ko) * 2004-01-08 2006-03-10 현대자동차주식회사 메커니컬 프레스 장치
DE102004009256B4 (de) * 2004-02-26 2008-04-03 Schuler Pressen Gmbh & Co. Kg Mechanische Mehrservopresse
DE102005040263A1 (de) * 2005-08-24 2007-03-01 Müller Weingarten AG Verfahren und Vorrichtung zur Steuerung und Regelung der Stößelbewegung an servo-elektrischen Pressen
DE102006056520A1 (de) * 2006-11-30 2008-06-05 Schuler Pressen Gmbh & Co. Kg Presse mit Kurvenkorrektur
DE102006059796A1 (de) * 2006-12-15 2008-06-19 Müller Weingarten AG Verfahren und Vorrichtung zur Steuerung und Regelung von Stößellageabweichungen an servo-elektrischen Pressen
EP2008799A1 (de) * 2007-06-28 2008-12-31 Bruderer Ag Stanzpresse
DE102009057409B4 (de) * 2009-12-08 2013-02-28 Schuler Pressen Gmbh & Co. Kg Stößelantrieb mit Belastungsprofilanpasssung
DE102011052860A1 (de) 2010-08-24 2012-03-01 Schuler Pressen Gmbh Verfahren zum Betreiben einer Presse mit Unterantrieb und danach betriebene Presse

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
MX2014008528A (es) 2014-08-27
WO2013107444A1 (de) 2013-07-25
BR112014017480A2 (pt) 2017-06-13
CN104136208A (zh) 2014-11-05
DE102012100325B4 (de) 2014-09-04
BR112014017480B1 (pt) 2022-01-04
DE102012100325A1 (de) 2013-07-18
MX367462B (es) 2019-08-21
KR20140125380A (ko) 2014-10-28
ES2722249T3 (es) 2019-08-08
DE102012100325C5 (de) 2019-06-19
US10464275B2 (en) 2019-11-05
BR112014017480A8 (pt) 2017-07-04
CA2861447A1 (en) 2013-07-25
KR102037544B1 (ko) 2019-10-28
US20150047517A1 (en) 2015-02-19
EP2804751A1 (de) 2014-11-26
CN104136208B (zh) 2016-08-24
CA2861447C (en) 2020-03-24

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