EP0315543B1 - Schlagpresse mit Kniehebelhemmung - Google Patents
Schlagpresse mit Kniehebelhemmung Download PDFInfo
- Publication number
- EP0315543B1 EP0315543B1 EP88402774A EP88402774A EP0315543B1 EP 0315543 B1 EP0315543 B1 EP 0315543B1 EP 88402774 A EP88402774 A EP 88402774A EP 88402774 A EP88402774 A EP 88402774A EP 0315543 B1 EP0315543 B1 EP 0315543B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slide
- tool holder
- connecting rods
- hammer
- impact press
- 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
Links
Images
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 (see for example GB-A-920195).
- 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 present invention aims to provide a new exhaust system for an impact press which causes practically no wear of the mechanism while being simple and economical in construction and safe to operate.
- 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 tool holder, 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.
- 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 articulated 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 7.
- 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 can be provided integral with the frame 2 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)
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8715751A FR2622836A1 (de) | 1987-11-06 | 1987-11-06 | |
FR8715751 | 1987-11-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0315543A1 EP0315543A1 (de) | 1989-05-10 |
EP0315543B1 true 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)
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 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1633995A (en) * | 1927-06-28 | Power hammer | ||
DE195625C (de) * | ||||
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 |
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 |
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 |
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 |
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 |
-
1987
- 1987-11-06 FR FR8715751A patent/FR2622836A1/fr not_active Withdrawn
-
1988
- 1988-10-31 US US07/264,360 patent/US4895213A/en not_active Expired - Lifetime
- 1988-11-04 EP EP88402774A patent/EP0315543B1/de not_active Expired - Lifetime
- 1988-11-04 DE DE8888402774T patent/DE3861761D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0315543A1 (de) | 1989-05-10 |
DE3861761D1 (de) | 1991-03-14 |
FR2622836A1 (de) | 1989-05-12 |
US4895213A (en) | 1990-01-23 |
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