EP0427676B1 - Querförderpresse - Google Patents

Querförderpresse Download PDF

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Publication number
EP0427676B1
EP0427676B1 EP90810844A EP90810844A EP0427676B1 EP 0427676 B1 EP0427676 B1 EP 0427676B1 EP 90810844 A EP90810844 A EP 90810844A EP 90810844 A EP90810844 A EP 90810844A EP 0427676 B1 EP0427676 B1 EP 0427676B1
Authority
EP
European Patent Office
Prior art keywords
ram
retaining pin
pressing
transverse conveyor
die
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
EP90810844A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0427676A1 (de
Inventor
Ulrich Steinhauser
Ernst Ballmer
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.)
Hatebur Umformmaschinen AG
Original Assignee
Hatebur Umformmaschinen 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 Hatebur Umformmaschinen AG filed Critical Hatebur Umformmaschinen AG
Priority to AT90810844T priority Critical patent/ATE98536T1/de
Publication of EP0427676A1 publication Critical patent/EP0427676A1/de
Application granted granted Critical
Publication of EP0427676B1 publication Critical patent/EP0427676B1/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
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/14—Ejecting devices

Definitions

  • the present invention relates to a method for the trouble-free removal of a compact and a cross conveyor press according to the preambles of claims 1 and 4.
  • High-speed cross conveyor presses in the sense of the present invention are automatic forging machines which have a plurality of forming stations arranged horizontally next to one another.
  • a wire that is fed step by step with or without preheating is first divided into sections and then transported with the aid of a gripper system from one forming station to the other, where it is formed between the punch and the die, until the compact finally falls from the last forming station onto a conveyor belt.
  • a conventional ejector without self-control is shown in DE-A-2 027 692, wherein pressed parts, such as articulated crosses, tripods, T-pieces, etc., are guided or held between the forming tools with ejectors and retaining pins on the die and die side.
  • a holding pin is drawn into the stamp by self-control during stamp retraction. Thanks to this design, parts with deep stamping on the stamp side, so-called “tulips”, can fall down freely into the chute.
  • US-A-3 911 718 shows, among other things, a retaining pin-piston combination (part 35a, FIGS. 5 and 6) with which a controlled retraction would be possible.
  • the control required for this takes place via valves arranged outside the tool, so that such a proposal cannot lead to the desired success due to the inevitably associated switching time delays in high-speed forming presses.
  • US Pat. No. 3,748,887 also shows holding pins which are controlled by pneumatic valves arranged outside the forming tool. In view of the relatively long connecting lines between the valve and the working cylinder, long switching times also result here, so that this control cannot be used in high-speed forming machines.
  • the task underlying the present invention thus arose, while avoiding additional switching and control elements, that is to say with the elements already present on the machine in the tool area, of developing a control for the plunger-side holding pin, which is practically vibration-independent and absolute even at extreme output frequencies works synchronously in relation to the main drive of the machine and at the same time is easily accessible with an uncomplicated design and can therefore be replaced quickly.
  • the stamp-side retaining pin should therefore take the preformed compact from the penultimate forming station in the course of a press slide stroke, insert it into the die and retract together with the receding stamp after the shaping has been carried out, so that the compact that is ejected from the die is no longer in the way and then falls down by gravity.
  • a pressed part or compact 2 is fed on a multi-stage press with a horizontal pressing plane laterally in the direction of the arrow shown in the illustration from top to bottom of the forming station.
  • the compact 2 is brought into its shaping position by a transverse transport pliers with pliers jaws 6a, 6b and then, during the pushing through and into the tools (die 3 and punch 4), is held between an ejector 5 and a retaining pin 1 (FIG. 2), so that the jaws 6a, 6b can be released from the compact.
  • the ejector 5 is braked in its longitudinal movement by a known ejector brake B.
  • the retaining pin 1 is a controlled retaining pin, since it can be displaced via an ejector pin 10, which is preferably guided coaxially within the plunger 4 in a bearing bush 21 and is coupled to a known ejector drive.
  • the control of the ejector pin 10 on the stamp side causes the compact 2 to be pushed into the die 3 against the braked ejector 5 before the insertion into the die 3, so that the stamp 4 can then carry out its shaping work , as can be seen from Fig. 3.
  • the holding pin 1 is displaceably guided on its section facing the stamp head in a preferably coaxial stamp bore 16 and has on the stamp head opposite end section 17 a piston 8 which is displaceable together with the retaining pin 1 in a coaxial bore 18 which is enlarged relative to the stamp bore between a front end position X 1 and a rear end position X 2.
  • a line 20 leads with its mouth 19 at a pressure medium inlet point 9 lying along the displacement path, a pressure medium 7 from a source, not shown, into the coaxial bore 18. If the piston 8 has been displaced into a position just behind the reversing point 9 by the ejector pin 10 on the stamp, as can be seen in FIG.
  • the pressure medium 7 flows from the line 20 into the cylinder space section 11b and pushes the holding pin 1 with a at the appropriate pressure high speed in its position shown in Fig. 2, in which it is present at the front end position X1 and at the same time pushes the compact 2 against the braked ejector 5.
  • stamp-side ventilation channels could also be provided.
  • the device described above which works with a pressure medium reversal, is replaced by a spring device.
  • a spring 12 guided as a compression spring in a telescopic housing 22, is articulated between a bearing 13 within the plunger 4 and a bearing 14 on the holding pin 1 or on its end section 17.
  • the spring 12 passes through a spring turning point 15 (FIG. 7a) and loads the retaining pin on both sides of this turning point in the direction of the front or rear end position X1, X2.
  • the retaining pin is in its front end position X1, in the illustration in Fig. 7b in its rear end position X2.
  • the retaining pin reversals as structural units, each with line orifices 19 arranged at different longitudinal distances between the end positions X 1 and X 2 or placed differently Spring-turning points 15 ready.
  • the holding pin 1 on its piston 8 could also be displaced forwards and backwards relative to the plunger 4 via directional valves.
  • This embodiment variant is particularly suitable for comparatively slow-running presses in which the reversing process does not require an extremely high reversing speed.
  • the directional control valves should be mounted as close as possible to the piston 8 on the ram side.
  • the first and second embodiments can be used on cross conveyor presses with high press stroke rates with up to over 180 strokes per minute.
  • the actual reversing process of the holding pin takes up only a small fraction of the number of pressing strokes, which can be reliably achieved with these embodiments.
  • the reversal effected according to the invention in connection with the actuation of the stamp-side ejector pin ensures a switching frequency that is precisely matched to the respectively required number of production in short as well as in continuous operation.
  • the control device accommodated in the stamp for example as an exchangeable component, is resistant to external influences completely protected and can be installed and removed quickly and easily on the stamp side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
EP90810844A 1989-11-09 1990-11-02 Querförderpresse Expired - Lifetime EP0427676B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90810844T ATE98536T1 (de) 1989-11-09 1990-11-02 Querfoerderpresse.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH403889 1989-11-09
CH4038/89 1989-11-09

Publications (2)

Publication Number Publication Date
EP0427676A1 EP0427676A1 (de) 1991-05-15
EP0427676B1 true EP0427676B1 (de) 1993-12-15

Family

ID=4268657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810844A Expired - Lifetime EP0427676B1 (de) 1989-11-09 1990-11-02 Querförderpresse

Country Status (5)

Country Link
US (1) US5099672A (ja)
EP (1) EP0427676B1 (ja)
JP (1) JPH0712498B2 (ja)
AT (1) ATE98536T1 (ja)
DE (1) DE59003881D1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960015733B1 (ko) * 1994-07-16 1996-11-20 맹혁재 등속조인트의 외륜단조성형장치 및 그 단조성형방법
JP5021257B2 (ja) * 2006-09-08 2012-09-05 Ｎｔｎ株式会社 横型鍛造装置用金型
JP5021256B2 (ja) * 2006-09-08 2012-09-05 Ｎｔｎ株式会社 横型鍛造装置用金型
JP5688568B2 (ja) * 2008-07-15 2015-03-25 山野井精機株式会社 被加工金属部材に突起を形成する突起形成方法
IT201900012591A1 (it) * 2019-07-22 2021-01-22 A Agrati S P A Dispositivo per frenare lo spostamento assiale per inerzia dell’estrattore del pezzo mentre viene espulso fuori da un relativo gruppo di matrici di una machina stampatrice per la produzione di viteria e bulloneria
CN114535489B (zh) * 2022-01-07 2024-05-07 浙江福达合金材料科技有限公司 一种铆钉型电触头脱模装置及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254437B (de) * 1964-04-10 1967-11-16 Fritz Bernhard Hatebur Vorrichtung zur Steuerung von Hilfselementen, wie Pressschlittenauswerfer, Pressschlittenfuehrungshuelse od. dgl. fuer Doppeldruck- und Mehrstufenpressen
DE1527998A1 (de) * 1966-12-15 1970-04-09 Walter Hoernlein Kg Metallware Auswerfer fuer Blechstanzlinge od.dgl.
US3524338A (en) * 1968-02-05 1970-08-18 Continental Can Co Stripping punch
DE2027692B2 (de) * 1970-06-05 1974-01-03 F.B. Hatebur Ag, Basel (Schweiz) Quertransport-Warmgesenkschmiedepresse
US3748887A (en) * 1971-10-01 1973-07-31 Ladish Co Method and apparatus for locating stock in forming dies
US3911718A (en) * 1974-06-12 1975-10-14 Robert E Requarth Hydraulic ejection device
US4222260A (en) * 1978-05-15 1980-09-16 Wsp Industries Corporation Warm forging of connecting rod caps

Also Published As

Publication number Publication date
ATE98536T1 (de) 1994-01-15
DE59003881D1 (de) 1994-01-27
JPH0712498B2 (ja) 1995-02-15
JPH03165938A (ja) 1991-07-17
US5099672A (en) 1992-03-31
EP0427676A1 (de) 1991-05-15

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