EP0482360B1 - Motorgetriebene Presse mit Kraft- und Wegsensoren - Google Patents

Motorgetriebene Presse mit Kraft- und Wegsensoren Download PDF

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Publication number
EP0482360B1
EP0482360B1 EP91116078A EP91116078A EP0482360B1 EP 0482360 B1 EP0482360 B1 EP 0482360B1 EP 91116078 A EP91116078 A EP 91116078A EP 91116078 A EP91116078 A EP 91116078A EP 0482360 B1 EP0482360 B1 EP 0482360B1
Authority
EP
European Patent Office
Prior art keywords
press
threaded spindle
nut
housing
spindle
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.)
Expired - Lifetime
Application number
EP91116078A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0482360A3 (en
EP0482360A2 (de
Inventor
Guenther Dipl.-Ing. Henzler
Alfred Dipl.-Ing. Hettich
Richard Dipl.-Ing. Bader
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0482360A2 publication Critical patent/EP0482360A2/de
Publication of EP0482360A3 publication Critical patent/EP0482360A3/de
Application granted granted Critical
Publication of EP0482360B1 publication Critical patent/EP0482360B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B30B1/18—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 screw 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
    • B30B15/0094—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
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof

Definitions

  • the invention relates to a press according to the preamble of claim 1.
  • a spindle is axially fixed, rotatably guided in a rotationally fixed, axially displaceable nut.
  • the nut is supported axially on the spindle. It can carry a pressing tool at its free end and is guided in the press housing with high expenditure on storage technology.
  • the conventional spindle / nut arrangements also called spindle drives for short, have a large volume.
  • the associated presses are correspondingly large and heavy.
  • a press is known from EP 0 358 770, the displacement and force sensors of which are incorporated in the flow of the pressing force and are integrated in a space provided for this purpose.
  • This press also has a rotationally fixed threaded spindle which is axially displaceable and which is axially displaced by axially non-displaceable, rotatably mounted nuts, driven by a drive motor.
  • This press is well suited for molding sintered metal objects.
  • the mounting of the drive and the design of the nut displacing the spindle are less favorable because the pressure sensor arranged there is delivered to the full working pressure. In the worst case, this can destroy the sensor. Otherwise, if a more robust sensor were arranged, its sensitivity would no longer be sufficient for the high accuracy of pressure measurement required above.
  • the press according to the invention with the characterizing features of claim 1 has the advantage that it is particularly compact, accurate to measure, insensitive to interference and easy to use for many different purposes, such as flanging, embossing, caulking or the like. Without a process-specific retooling of the measuring device necessary is.
  • a radial bearing is saved compared to comparable press designs for the bearing of the spindle drive. This means that possible errors such as bores or bolts that are too large, too small or tapered on different sides, sloping attachment or seizing can be reliably detected. Defective press connections can be sorted out in good time.
  • FIG. 1 shows the overall structure of the press schematically and partially in section
  • FIG. 2 shows the threaded spindle assembly with gear
  • FIG. 3 shows a detail of the upper threaded spindle area.
  • the press shown in FIG. 1 shows, on the left-hand side in the viewing direction, an electric drive 3 to which a gear 5 is flanged.
  • the gear 5 is mounted on a spindle drive housing 7, which has a spindle housing extending parallel to the gear 5 9 wears.
  • the spindle drive housing 7 On its side facing away from the spindle housing 9, the spindle drive housing 7 is connected to a press frame 11 which is connected via support columns 13, 15 to a base plate 17 forming a foundation.
  • a press ram 19 protrudes from the spindle drive housing 7 or the press frame 11 in the direction of the base plate 17 and holds a tool holder 21 at its free end in which a mandrel-like workpiece 23 is seated.
  • An anvil-like tool holder 25 sits on the base plate 17. This holds a further, hub-like workpiece 27 into which the workpiece 23 is to be pressed.
  • the assembly of the press 1 schematically shown in FIG. 2 corresponding to FIG. 1 shows in the spindle drive housing 7 a countershaft 29, the input shaft 31 of which is driven via the gear 5 (not shown here) (corresponding to FIG. 1).
  • a rotary encoder directly coupled to the gear train 29 serves as a displacement sensor 33 for checking the advance of the threaded spindle 35 and is arranged in a protected manner within the spindle drive housing 7.
  • a threaded spindle 35 in the form of a planetary roller threaded spindle is mounted in the spindle drive housing 7.
  • This threaded spindle 35 is encompassed in a leading manner by a nut 37.
  • the nut 37 is encompassed by a bearing sleeve 39 so that it cannot rotate.
  • a certain axial play is set between the nut 37 and the bearing sleeve 39. The axial play must correspond to the travel distance of the force sensor 47, which it needs to indicate the acting forces.
  • the bearing sleeve 39 is mounted in the spindle drive housing 7 together with the threaded spindle 35 and the nut 37 via an upper and a lower radial ball bearing 41, 43. Between a collar 38 of the nut 37, a force measuring ring 47 is supported on the fixed outer ring of the upper radial ball bearing 41 via the housing-fixed ring of an axial ball bearing 45. Axially coupled to the collar 38 is followed by a drive gear 49 which is in engagement with a gear of the countershaft 29 for driving the nut 37.
  • an anti-rotation device 51 On its side facing away from the press ram 19 of the threaded spindle 35, an anti-rotation device 51, not shown in detail, is arranged in the upper part of the spindle housing 9 and at the same time forms an axial guide for the threaded spindle 35.
  • the electric drive 3 is started by actuating a switch (not shown).
  • the nut 37 is rotated with the bearing sleeve 39 via the gear 5, the countershaft 29 and the drive gear 49.
  • the threaded spindle 35 is moved axially in the direction of the base plate 17 or away from it.
  • the pressing process begins as soon as the workpiece 23 touches the workpiece 27.
  • the pressure that builds up is transferred via the press ram 19 and the threaded spindle 35 to the nut 37, the collar 38 and further to the thrust bearing 45.
  • the axial force is transmitted from the axial bearing 45 to the outer ring of the radial ball bearing 41 via the force measuring ring 47.
  • the pressing force is absorbed by the spindle drive housing 7, the press frame 11, the columns 13, 15 and the base plate 17.
  • the size of the pressing force is determined by the force measuring ring 47 and displayed by evaluation devices, not shown.
  • the course of the pressing force can be represented over the pressing path. By detecting the deviations between the measured and the ideal pressure force curve determined in tests, the actual pressure force curve can be precisely assessed. This results in a particularly reliable quality control for press connections.
  • the mounting space of the press in the area of the tool holder is sufficiently dimensioned and accessible free of disturbing, sensitive measuring arrangements and cables.
  • the integrated arrangement of the force sensor 47 directly in the support area between the nut 37 or the threaded spindle 35 and the spindle drive housing 7 enables a particularly sensitive, trouble-free measurement of the pressing force.
  • a slide 55 is fixedly connected to the threaded spindle 35 at its upper end.
  • This has the form of a two-armed lever, each arm carrying a slide-bearing-like bore 56, 58, each of which is encompassed by a column 57, 59 parallel to the threaded spindle 35.
  • the columns 57, 59 are anchored at their upper end in a yoke 53 fixed to the housing and at their lower ends, not shown, in the spindle drive housing 7.
  • the force sensor is arranged as a force measuring ring with the bearing sleeve and is connected to an evaluation unit by means of electrical sliding contacts.
  • the force sensor is arranged in the form of one or more cantilever arms or bending beams equipped with strain gauges. These are clamped at one end to the housing, with the other end they are supported transversely to their longitudinal axis on the nut or the threaded spindle in such a way that, in proportion to the pressing force, they are bent following the axial play of the nut.
  • Such a sensor arrangement has a particularly high sensitivity.
  • the threaded spindle is provided with a central longitudinal bore in which the force sensor and the associated electrical connections are held.
  • the force sensor is included in the force flow by being supported on an adjacent end face, for example of the stamp, or, in the case of a split design of the threaded spindle, of a section of the threaded spindle.
  • a rotatable arrangement of the force sensor for example coupled to the nut, is possible if it is electrically connected to the outside, for example via sliding contacts.
  • a torsion sensor or the like can also be used as the force sensor.
  • a linear encoder can also be used as a displacement sensor for direct displacement measurement coupled to the threaded spindle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP91116078A 1990-10-25 1991-09-21 Motorgetriebene Presse mit Kraft- und Wegsensoren Expired - Lifetime EP0482360B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9014783U DE9014783U1 (de) 1990-10-25 1990-10-25 Motorgetriebene Presse mit Kraft- und Wegsensoren
DE9014783U 1990-10-25

Publications (3)

Publication Number Publication Date
EP0482360A2 EP0482360A2 (de) 1992-04-29
EP0482360A3 EP0482360A3 (en) 1992-08-19
EP0482360B1 true EP0482360B1 (de) 1995-03-08

Family

ID=6858750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91116078A Expired - Lifetime EP0482360B1 (de) 1990-10-25 1991-09-21 Motorgetriebene Presse mit Kraft- und Wegsensoren

Country Status (2)

Country Link
EP (1) EP0482360B1 (ko)
DE (2) DE9014783U1 (ko)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8146240B2 (en) 1997-07-21 2012-04-03 Newfrey Llc Riveting system and process for forming a riveted joint

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08224699A (ja) * 1995-02-23 1996-09-03 Mitsubishi Electric Corp プレス制御方法およびプレス装置
DE19705462C2 (de) 1997-02-13 2002-01-10 Schmidt Feinmech Verfahren zum Betreiben einer Elektropresse
US9015920B2 (en) 1997-07-21 2015-04-28 Newfrey Llc Riveting system and process for forming a riveted joint
DE29808262U1 (de) * 1998-05-07 1998-09-17 Walter Söhner GmbH & Co, 74193 Schwaigern Presse
GB9906389D0 (en) * 1999-03-22 1999-05-12 Hughes Glyn Computer controlled mechanical press
DE10011859C2 (de) * 2000-03-10 2002-05-29 Carsten Winter Einpressvorrichtung
EP1537988B1 (en) * 2000-10-30 2009-02-11 Aida Engineering Co., Ltd. Bottom dead centre correction device for servo press machines
DE10218633B3 (de) * 2002-04-25 2004-08-19 Tmd Friction Europe Gmbh Presse
FR2869168B1 (fr) * 2004-04-14 2006-06-23 Transrol Soc Par Actions Simpl Verin d'actionnement a capteur associe a sa tige
DE102006014705B3 (de) * 2006-03-30 2007-07-05 Krauss-Maffei Kunststofftechnik Gmbh Stanzvorrichtung, insbesondere für Kunststoffformteile
JP5699617B2 (ja) * 2011-01-13 2015-04-15 新東工業株式会社 電動シリンダ及び電動シリンダシステム
JP5699618B2 (ja) * 2011-01-13 2015-04-15 新東工業株式会社 電動シリンダシステム
PL2659164T3 (pl) 2011-09-14 2019-09-30 Sintokogio, Ltd. Siłownik elektryczny i układ siłownika elektrycznego
US9027220B2 (en) 2012-08-07 2015-05-12 Newfrey Llc Rivet setting machine
CN103737274A (zh) * 2013-12-29 2014-04-23 大连华阳化纤科技有限公司 一种纺丝组件的安装与密封装置
DE102014110507A1 (de) * 2014-07-25 2016-01-28 Ief-Werner Gmbh Pressverfahren mit Kompensation von Positionierfehlern bei einem Pressvorgang und Presse zur Durchführung eines solchen Verfahrens
CN111571187B (zh) * 2020-06-22 2024-04-16 十堰恒瑞机电设备有限公司 一种高效的汽车半轴螺钉压装机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4592220A (en) * 1984-08-07 1986-06-03 Rca Corporation System and method for the in press adjustment of workpiece holding force
US4548066A (en) * 1984-08-07 1985-10-22 Rca Corporation Press workpiece thickness measuring system and method
SU1433744A1 (ru) * 1986-08-01 1988-10-30 Куйбышевский политехнический институт им.В.В.Куйбышева Способ управлени процессом запрессовки на механическом прессе
SU1438947A1 (ru) * 1987-04-27 1988-11-23 МВТУ им.Н.Э.Баумана Устройство дл сборки запрессовкой конических соединений
JP2519498B2 (ja) * 1988-01-16 1996-07-31 ファナック株式会社 電動式粉末成形機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8146240B2 (en) 1997-07-21 2012-04-03 Newfrey Llc Riveting system and process for forming a riveted joint

Also Published As

Publication number Publication date
EP0482360A3 (en) 1992-08-19
DE9014783U1 (de) 1992-02-20
DE59104865D1 (de) 1995-04-13
EP0482360A2 (de) 1992-04-29

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