EP1446247B1 - Vorrichtung zum ausstossen von umformteilen aus einem umformwerkzeug - Google Patents

Vorrichtung zum ausstossen von umformteilen aus einem umformwerkzeug Download PDF

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Publication number
EP1446247B1
EP1446247B1 EP02774242A EP02774242A EP1446247B1 EP 1446247 B1 EP1446247 B1 EP 1446247B1 EP 02774242 A EP02774242 A EP 02774242A EP 02774242 A EP02774242 A EP 02774242A EP 1446247 B1 EP1446247 B1 EP 1446247B1
Authority
EP
European Patent Office
Prior art keywords
spring
plunger
guide tube
pitch
ejection
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
EP02774242A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1446247A1 (de
Inventor
Rudolf Lüthi
Daniel Meier
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.)
Adval Tech Holding AG
Original Assignee
Adval Tech 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 Adval Tech Holding AG filed Critical Adval Tech Holding AG
Publication of EP1446247A1 publication Critical patent/EP1446247A1/de
Application granted granted Critical
Publication of EP1446247B1 publication Critical patent/EP1446247B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices

Definitions

  • the present invention relates to a device for ejecting formed parts, in particular those made of sheet metal, from a forming tool with a movable in the forming tool in a guide tube and in the ejection direction by a spring loaded ram (see, eg DE-A-40 28 425 ).
  • feather pillows Such devices are known and are also referred to as feather pillows. As feathers are regularly used in such feather pillows compression springs.
  • the forming tool may be e.g. to act in a press a multi-stage, consisting of an upper and a lower part progressive tool.
  • the upper part is in this case installed in the press ram and performs lifting movements together with it.
  • Modern presses run with high stroke rates of a few hundred strokes per minute. Between each stroke, the parts to be formed, e.g. be ejected safely from the top. Production figures of 100 million units per year are not uncommon. Up to now, tool life of about 1/3-year could be achieved under such conditions. The wear or failure of the feather pillows proved to be a limiting factor.
  • the invention is inter alia the object of a device for ejecting formed parts from a forming tool with a in the forming tool in a Specify guide tube in movably guided and in the ejection direction by a spring loaded ram, which is characterized by a longer service life. According to the invention this object is achieved in such a device in that a tension spring is used as a spring.
  • the invention is based on the finding that the compression springs previously used in the spring cushion tend to deflect radially as soon as they are compressed and that the deflection can be so great that the spring contacts the guide tube. This results in a metallic abrasion and ultimately leads to failure of the spring cushion.
  • a tension spring is used instead of a compression spring, this problem will be avoided with advantage and it is achieved in accordance with the task a longer life.
  • a coil spring is used as a tension spring and used so that the guide tube and the plunger are arranged substantially within this coil spring.
  • threaded plugs are provided for connecting the spring to the guide tube and to the plunger on the guide tube and on the plunger, into which screwed into the spring ends.
  • the pitch of the thread on the threaded plug of a central spring pitch is dimensioned accordingly, being provided as an average spring pitch such as it has the spring at a middle position of the plunger between its two end positions.
  • 1 denotes the plunger of a press, which is not shown itself.
  • 2 designates the upper part of a forming tool attached to the ram 1, 3 the actual forming tool, 4 a sheet metal part which has already been formed, and 5 a spring pillow according to the invention inserted in a stepped bore in the press ram 1.
  • the spring cushion 5 in turn comprises a plunger 6, which is displaceable in two sliding guides 7 and 8 in its longitudinal direction.
  • the sliding guides 7, 8 are arranged on the inside on a guide tube 9.
  • the guide tube 9 is part of a type of sleeve 10, which still has an outer tube 11.
  • the outer tube 11 opens into a flange 12 which is fixed to a step 13 of the mentioned stepped bore.
  • the drawing shows the spring-pad plunger 6 in its fully extended lower end position, in which the spring 15 is the least tensioned and therefore has only a small slope along its central region, where it is free. If the plunger 6 is pressed when closing the tool by the spring travel F up to its upper end position, the spring 15 is stretched maximum and receives in its free area, the maximum slope. In a ram position exactly halfway between the two end positions, the spring 15 naturally has an average pitch. On the two plugs, the spring 15 is fixed by the thread. This changes the pitch of the spring 15 here at the transition between the two end positions not. In order to preserve the spring and to keep the slope difference between its middle, free section and its two end sections as low as possible on the average, the slope on the end sections is chosen approximately equal to the mentioned average slope.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP02774242A 2001-11-22 2002-11-19 Vorrichtung zum ausstossen von umformteilen aus einem umformwerkzeug Expired - Lifetime EP1446247B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH21562001 2001-11-22
CH215601 2001-11-22
PCT/CH2002/000622 WO2003043759A1 (de) 2001-11-22 2002-11-19 Vorrichtung zum ausstossen von umformteilen aus einem umformwerkzeug

Publications (2)

Publication Number Publication Date
EP1446247A1 EP1446247A1 (de) 2004-08-18
EP1446247B1 true EP1446247B1 (de) 2007-06-27

Family

ID=4567736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774242A Expired - Lifetime EP1446247B1 (de) 2001-11-22 2002-11-19 Vorrichtung zum ausstossen von umformteilen aus einem umformwerkzeug

Country Status (7)

Country Link
US (1) US7254979B2 (enrdf_load_stackoverflow)
EP (1) EP1446247B1 (enrdf_load_stackoverflow)
JP (1) JP2005509524A (enrdf_load_stackoverflow)
KR (1) KR20040066840A (enrdf_load_stackoverflow)
CN (1) CN1270843C (enrdf_load_stackoverflow)
DE (1) DE50210394D1 (enrdf_load_stackoverflow)
WO (1) WO2003043759A1 (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7765847B2 (en) * 2006-11-02 2010-08-03 Flextronics Ap, Llc Modular power pack assembly
CN101885033B (zh) * 2009-05-11 2012-08-29 福光企业股份有限公司 锻造部品成型机的顶托通出装置
CN102363176A (zh) * 2011-06-29 2012-02-29 天津汽车模具股份有限公司 一种用于汽车模具行程限位的缓冲式限位板
CN102794383B (zh) * 2012-08-13 2015-04-15 苏州工业园区新凯精密五金有限公司 一种台阶型产品退料顶针接料主模结构
CN103331388A (zh) * 2013-07-03 2013-10-02 合肥亿恒机械有限公司 一种新型顶料机构
CN103803794B (zh) * 2014-02-26 2016-08-24 广州市南亚纸浆模塑设备有限公司 一种结构改进的冲压凹模
CN104014681A (zh) * 2014-06-27 2014-09-03 成都丽元电器有限公司 一种新型弹簧式取料装置
CN106944569A (zh) * 2017-03-15 2017-07-14 无锡市翱宇特新科技发展有限公司 一种五金冲压模具的顶料机构
CN108723278A (zh) * 2018-05-11 2018-11-02 盐城杰精机械制造有限公司 一种铆接机
CN109482743B (zh) * 2018-11-24 2024-03-22 鑫望威科技有限公司 一种汽车门模具及使用方法
CN110727118A (zh) * 2019-10-22 2020-01-24 中国人民解放军第四军医大学 方便调节的骨科医生观片装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US445238A (en) * 1891-01-27 Machinery for forming car-wheels
US1721283A (en) * 1927-07-30 1929-07-16 Burdsall & Ward Co Swaging machine
US1977163A (en) * 1933-07-22 1934-10-16 Waterbury Farrel Foundry Co Die mechanism
US2227524A (en) * 1938-11-08 1941-01-07 Hazel Atlas Glass Co Apparatus for manufacturing closures
US2329325A (en) * 1943-03-01 1943-09-14 Sherman E Berry Machine for reshaping bottle caps
CH295447A (de) * 1951-04-30 1953-12-31 Ag L Schuler Auswerfvorrichtung an einer Presse.
DE1142149B (de) * 1962-01-08 1963-01-10 Schuler L Ag Ausstosser an Blechpressen
NL6704471A (enrdf_load_stackoverflow) * 1967-03-29 1968-09-30
US3620113A (en) * 1969-09-08 1971-11-16 Dayton Progress Corp Ejector type punch
US3911719A (en) * 1974-12-02 1975-10-14 Ragsdale Brothers Inc High speed ejector mechanism
US4887448A (en) * 1988-06-21 1989-12-19 Teledyne Industries Inc. Knockout pin apparatus
DE4028425A1 (de) * 1990-09-07 1992-03-12 Alcoa Gmbh Verpackwerke Verfahren und vorrichtung zum entfernen von verschlusskapseln und abscherringen aus einem tiefziehwerkzeug

Also Published As

Publication number Publication date
KR20040066840A (ko) 2004-07-27
CN1270843C (zh) 2006-08-23
AU2002340702A1 (en) 2003-06-10
US7254979B2 (en) 2007-08-14
CN1585680A (zh) 2005-02-23
JP2005509524A (ja) 2005-04-14
EP1446247A1 (de) 2004-08-18
WO2003043759A1 (de) 2003-05-30
US20040255636A1 (en) 2004-12-23
DE50210394D1 (de) 2007-08-09

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