EP0315543A1 - Schlagpresse mit Kniehebelhemmung - Google Patents

Schlagpresse mit Kniehebelhemmung Download PDF

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Publication number
EP0315543A1
EP0315543A1 EP88402774A EP88402774A EP0315543A1 EP 0315543 A1 EP0315543 A1 EP 0315543A1 EP 88402774 A EP88402774 A EP 88402774A EP 88402774 A EP88402774 A EP 88402774A EP 0315543 A1 EP0315543 A1 EP 0315543A1
Authority
EP
European Patent Office
Prior art keywords
slide
connecting rods
hammer
tool holder
exhaust device
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.)
Granted
Application number
EP88402774A
Other languages
English (en)
French (fr)
Other versions
EP0315543B1 (de
Inventor
Guy Neyret
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0315543A1 publication Critical patent/EP0315543A1/de
Application granted granted Critical
Publication of EP0315543B1 publication Critical patent/EP0315543B1/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
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/02—Special design or construction
    • B21J7/04—Power hammers

Definitions

  • the invention relates to an impact press of the type comprising a tool holder mounted to slide in a driven slide and subjected to the action of an elastically loaded hammer and sliding in said slide, an exhaust device separating the elastic load from with the slide in a determined position of the stroke.
  • the elastic load thus released violently drives the hammer which strikes the tool holder, the tool of which is in contact with the workpiece after the first stroke or approach stroke.
  • the exhaust systems generally use a radial exhaust of balls or circular segments which come opposite holes or grooves at a position of advance of the slide. These balls or segments support the full load of the elastic load, generally constituted by a spring, so that the mechanism is subjected to significant wear.
  • the object of the present invention is to provide a new exhaust system for an impact press which practically does not wear out the mechanism while being of simple and economical construction and safe operation.
  • the impact press according to the invention is characterized in that said exhaust device comprises two connecting rods articulated one on the other at one end and the other end of which is articulated respectively on the hammer and on the workpiece carrier, a return spring tending to bring the connecting rods into an alignment position in which the articulation axes are aligned along a straight line parallel to the movement of the mechanism, one of the connecting rods comprising a ramp with which an axis cooperates secured to the slide.
  • the press comprises a slide 1 driven in translation relative to a frame 2 by any suitable means such as a lever with rack-pinion or connecting rod for manual drive, cam for mechanical drive, or jack for pneumatic drive.
  • a sliding hammer 3 subjected to the action of a compression spring 4.
  • the spring 4 is in abutment against a nut 5 screwed on the slider 1 to initially adjust the pressure of the spring 4.
  • a sliding tool holder 6 In the slide 1 is also housed a sliding tool holder 6.
  • the hammer 3 and the tool holder 6 are connected to each other by a toggle joint system 7.
  • This system consists of two connecting rods 8, 9 hinged one on the other at one end around an axis 10.
  • the other end of the connecting rod 8 is articulated on an axis 11 integral with the hammer 3 while the other end of the connecting rod 9 is articulated on an axis 12 integral with the tool holder 6.
  • the arrangement is such that, when the toggle joint 7 is unfolded (FIGS. 1 and 2), the axes 10, 11, 12 are aligned on a straight line parallel to the movement of the slide 1.
  • the connecting rod 8 has a lateral cutout 13 terminated by a ramp 14, an axis 15 secured to the slide 1 sliding in the cutout 13 when the toggle joint 7 is unfolded.
  • a return spring 16 acting on the axis 10 tends to unfold the toggle joint 17.
  • the axis 15 which previously slid in the cutout 13, comes into contact with the ramp 14.
  • the slider 1 drives the axis 15 which attacks the ramp 14 and thus spreads the connecting rod 8 to the right (in the drawing).
  • the axis 10 is no longer aligned with the axes 11 and 12, so that the toggle 7 is no longer rigid and folds back. This folding allows the hammer 3 to strike the tool holder 6 under the action of the spring 4 ( Figure 3).
  • a stop 17 secured to the frame 2 can be provided which stops the tool holder 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP88402774A 1987-11-06 1988-11-04 Schlagpresse mit Kniehebelhemmung Expired - Lifetime EP0315543B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8715751 1987-11-06
FR8715751A FR2622836A1 (de) 1987-11-06 1987-11-06

Publications (2)

Publication Number Publication Date
EP0315543A1 true EP0315543A1 (de) 1989-05-10
EP0315543B1 EP0315543B1 (de) 1991-02-06

Family

ID=9356788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402774A Expired - Lifetime EP0315543B1 (de) 1987-11-06 1988-11-04 Schlagpresse mit Kniehebelhemmung

Country Status (4)

Country Link
US (1) US4895213A (de)
EP (1) EP0315543B1 (de)
DE (1) DE3861761D1 (de)
FR (1) FR2622836A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6810767B1 (en) * 2002-07-22 2004-11-02 Aerospace Systems & Components, Inc. Floating roller lock
GB2423050A (en) * 2005-02-10 2006-08-16 Black & Decker Inc Hammer with ramps causing pivotal oscillation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE195625C (de) *
US2594522A (en) * 1950-10-06 1952-04-29 Thompson Sam Power-driven hammer
FR1099458A (fr) * 1953-12-18 1955-09-06 Seignol Presse ou potence de frappe à inertie
GB920195A (en) * 1960-12-15 1963-03-06 Mustad Maschinen Und Eisenware Spring loaded impact device
FR2343531A1 (fr) * 1976-03-10 1977-10-07 Laffay Gilbert Dispositif a frappe automatique pour le marquage, poinconnage, rivetage ou similaire

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1633995A (en) * 1927-06-28 Power hammer
US1959516A (en) * 1930-08-28 1934-05-22 Black & Decker Mfg Co Hammer
US2080130A (en) * 1936-02-15 1937-05-11 Hansen Mfg Co A L Stapling and tacking machine
US2626598A (en) * 1950-08-14 1953-01-27 Tarwater Lawson Electric hammer
US2772858A (en) * 1955-04-25 1956-12-04 Joseph C Novack Power hammers
US2787178A (en) * 1955-10-25 1957-04-02 Maxim George Axially projectable impact tool
US3063508A (en) * 1959-07-06 1962-11-13 Albert R Henry Pavement breaking drill
SU713680A1 (ru) * 1977-03-01 1980-02-05 Институт Автоматики Ан Киргизской Сср Ударный механизм дл бурильных машин
US4159634A (en) * 1978-05-19 1979-07-03 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Toggle mechanism for pinching metal tubes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE195625C (de) *
US2594522A (en) * 1950-10-06 1952-04-29 Thompson Sam Power-driven hammer
FR1099458A (fr) * 1953-12-18 1955-09-06 Seignol Presse ou potence de frappe à inertie
GB920195A (en) * 1960-12-15 1963-03-06 Mustad Maschinen Und Eisenware Spring loaded impact device
FR2343531A1 (fr) * 1976-03-10 1977-10-07 Laffay Gilbert Dispositif a frappe automatique pour le marquage, poinconnage, rivetage ou similaire

Also Published As

Publication number Publication date
FR2622836A1 (de) 1989-05-12
DE3861761D1 (de) 1991-03-14
US4895213A (en) 1990-01-23
EP0315543B1 (de) 1991-02-06

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