EP0043389B1 - Outil et procédé de coupe de haute précision - Google Patents
Outil et procédé de coupe de haute précision Download PDFInfo
- Publication number
- EP0043389B1 EP0043389B1 EP80200663A EP80200663A EP0043389B1 EP 0043389 B1 EP0043389 B1 EP 0043389B1 EP 80200663 A EP80200663 A EP 80200663A EP 80200663 A EP80200663 A EP 80200663A EP 0043389 B1 EP0043389 B1 EP 0043389B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting
- punch
- plate
- support
- retaining
- 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
Links
Images
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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/04—Processes
- Y10T83/06—Blanking
Definitions
- the invention relates to a tool for a fineblanking machine according to the preamble of claim 1 and a method for operating the same.
- the fineblanking technique differs from normal punching in particular in that the workpiece is clamped between a cutting plate and a press plate, also called a cutting and holding plate, before the cutting process begins, and on the workpiece a counterholder acts on the opposite side.
- the holding plate and, if necessary, also the cutting plate each carry an annular tooth following the partial contour, which is pressed into the workpiece before the cutting process.
- Fineblanked parts are used in a number of industrial sectors in thicknesses between 0.3 mm and 15 mm.
- US-A-1 995 446 describes a punching device for producing metal rakes, especially garden rakes.
- the stamp B punches recesses through the metal strip C into the form A with the form plate 10 and form slots 16, 17 into it by means of the punch tools 18, 19.
- bolts 24 and 25 are provided in the mold plate 10 on opposite sides of the mold slot 16, which engage in the already punched recesses and thus secure the material to be punched.
- the bolts are under the action of the coil springs 27.
- a wiper plate 30 is also provided.
- the known device is not a fineblanking tool since the counter holder is missing. It is also not a question of high-quality, tear-free smooth cuts and there is also no question that the limit values of fineblanking technology would be sought.
- DE-C-511 609 describes a punching device in which the workpiece S is guided and cut by the stationary shear knife 3 by means of a movable jaw 2, whereupon the remaining part of the workpiece A is clamped between the movable jaw 2 and the stationary jaw 1 and punched by stamp 5.
- the essence of the invention is to be seen in the fact that the material is laterally supported on its outer surface outside the cutting line at critical points by the support members. What is critical at first is always the part of the lateral surface that is closest to the cutting line and the distance between it, the web or edge width, is smaller than the material thickness. But even if this distance is greater than the material thickness, but the diameter of the hole to be cut is smaller than the material thickness, the invention has a surprisingly advantageous effect: Apparently the pressure distribution in the workpiece is influenced by the support so favorably that the cutting process is thereby considerably facilitated and thus the service life of the tool is increased sustainably. Especially in this case, however, the cutting punch should be surrounded on its entire circumference by one or more support members.
- the values achievable in fineblanking with a ring spike are unforeseen improved to a degree.
- the invention makes it possible to design interior and exterior shapes up to the limit values D / S ⁇ 2 / 3; A / S ⁇ to manufacture, in steel and non-ferrous metals, with thicknesses from 1 mm to 20 mm, even up to 30 mm.
- a cutting punch 1 designed as a punch is shown, which penetrates the material clamped and to be punched between the holding member 4, designed as a holding plate, and the cutting plate 2, down to the cutting plate 2.
- the punch 1 is moved forward with the cutting force F s .
- the counterholder 8 counteracts it with the counterforce F G.
- the punched part 7 cut out of the punched grid 6 is shown between the punch 1 and the counter holder 8.
- the lead frame 6 is thus a perforated plate
- the stamped part 7 is a waste slug.
- the holding force F H is transmitted to the holding plate 4 by the pressure bolts 5.
- the material to be cut is not held in place by means of an annular spike provided on the holding plate 4. Rather, the holding plate 4 has special holes 9 through which longitudinally movable support stamps 3 pass. These support the material to be punched on the lateral surfaces 11 of the holes adjacent to the cutting line 12.
- the holes 9 have a diameter of 1.02 to 1.06 the diameter of the support stamp 3, so that there is a game x, and any jamming is avoided.
- the punch 1 is surrounded on all sides by support stamps 3.
- the diameter of a support punch 3 is equal to the diameter D of the punch 1 or the hole to be cut, so that the holes adjacent to the cutting line of the material to be punched are supported on their entire circumferential surface.
- the shortest distance A (see FIG. FIG. 3) between the punch 1 and an adjacent support punch 3 may be between 1/3 and 2/3 of the thickness S of the lying material to be cut, and the diameter D of the hole punch 1 is between 2/3 and 1/1 of the thickness S, and yet be obtained high quality cut surfaces without tearing. This is completely unattainable with known techniques, not even by fine cutting with a ring spike.
- This first punching process can still be carried out without the participation of the support stamp 3, since the area of the punching has not yet been weakened by surrounding holes.
- the clamping of the material via the forces F H and F G prevents the material from bending, and the force F H ensures that the punched grid 6 is stripped from the punch 1 after the punching process has been carried out when the punch is withdrawn.
- the holding plate 4 then strips the lead frame or perforated plate 6 from the punch and the same is then moved until the first cut hole comes to rest under a support punch 3.
- the punched grid 6 can be moved into the new hole position by hand or via automatically driven coordination.
- the support stamp 3 is then inserted into the cut hole, then the material clamped the holding plate 4, and finally cut the next hole by means of the punch 1 acting against the counter-holder 8. During this punching process, the support punch 3, which is retracted into the first hole, already has a lateral support.
- the holding plate 4 carries the hole pattern to be cut into the material in shape and distance. As can be seen, the process consists of four bars, i. H. the device according to the invention has four functions.
- the individual elements of the device can be driven mechanically or hydraulically.
- a hydraulic drive is advantageous because it enables the individual forces, speeds of the elements and the cutting path to be better controlled.
- a perforated plate is shown in cross section, as can be produced in the manner described above.
- the cut surfaces of the holes are smooth and tear-free.
- the achievable limits are D / S> 2/3; A / S> 1 / a .
- the invention in the described embodiment can be used e.g. B. in the production of sieve sorting plates for seeds, sieve sorting plates for food processing, cutting plates for a meat grinder, cooling line support plates for reactors, etc.
- the lateral support is now provided by a support member 3, which is designed as a support plate concentrically surrounding the cutting punch 1 and movable in its direction. With its inner recess, the support plate is brought into positive engagement with the outer shape to be punched. The support plate 3 thus supports the outer shape in its lateral surface 11 by positive locking. The positive connection is achieved in that the support plate 3 is designed according to the outer shape. The support plate 3 is moved vertically with the control force F c . It must be stable enough that it can absorb the horizontal forces emanating from the lead frame 6 when cutting.
- the device is operated in principle as described for FIGS. 1 and 2. That is, the outer shape is first clamped by means of the ring-shaped holding member 4 and supported laterally by means of the support plate 3, and then punched by means of a punch 1 and counter-holder 8.
- the form-fitting lateral support of the shapes to be punched makes it possible to produce round or shaped holes with the smallest diameters and / or web and edge widths in relation to the material thickness.
- the result is highly smooth perforated walls with the highest degree of measurement accuracy, which cannot be achieved by a conventional drilling, milling or punching process, and at the same time with a long service life of the tool. Examples are shown in Fig. 8 ... 12.
- the support member 3 here consists of four clamping parts which can be positively and positively attached to the lateral surface 11 of the blank and which are moved with the control force F c .
- the holding member 4 is designed as an annular extension of a pressure part connected to the pressure bolts 5.
- the clamping parts or the control force F c support the blank during cutting.
- 16 round blanks 7 are cut out, which can be formed into sleeves, for example, in a subsequent extrusion processing.
- the lead frame 6, here in the form of a waste ring has an extremely small edge width A in relation to the material thickness S, for example 30% of S. In this way, in spite of the high-quality cutting surface, substantial material savings are achieved.
- the stamped part 7 is a gear.
- the lead frame 6 shown above in FIG. 17 is a waste ring of edge width A with internal teeth.
- the edge width A can be made extremely small, so that, despite the excellent quality of the tooth cut surfaces, a remarkable material saving is achieved here.
- the support members 3 are brought into supportive contact with all the parts of the lateral surface 11 of the part whose distance from the cutting line 12 is smaller as the Material thickness S.
- the part When making particularly small holes, the part must be supported as far as possible over its entire circumference. This makes cutting easier and significantly increases the tool life.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Turning (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Claims (10)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80200663T ATE9768T1 (de) | 1980-07-08 | 1980-07-08 | Werkzeug und verfahren zum feinschneiden. |
EP80200663A EP0043389B1 (fr) | 1980-07-08 | 1980-07-08 | Outil et procédé de coupe de haute précision |
DE8080200663T DE3069413D1 (en) | 1980-07-08 | 1980-07-08 | Tool and method for precision cutting |
SU813301193A SU1032994A3 (ru) | 1980-07-08 | 1981-06-23 | Штамп дл вырубки деталей из металлической заготовки или пробивки отверстий |
DD81231374A DD201757A5 (de) | 1980-07-08 | 1981-07-01 | Werkzeug und verfahren zum feinschneiden |
US06/279,560 US4509395A (en) | 1980-07-08 | 1981-07-01 | Process for precision cutting |
CA000381367A CA1175341A (fr) | 1980-07-08 | 1981-07-08 | Methode et outil de decoupage de precision a l'emporte-piece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP80200663A EP0043389B1 (fr) | 1980-07-08 | 1980-07-08 | Outil et procédé de coupe de haute précision |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0043389A1 EP0043389A1 (fr) | 1982-01-13 |
EP0043389B1 true EP0043389B1 (fr) | 1984-10-10 |
Family
ID=8187020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80200663A Expired EP0043389B1 (fr) | 1980-07-08 | 1980-07-08 | Outil et procédé de coupe de haute précision |
Country Status (7)
Country | Link |
---|---|
US (1) | US4509395A (fr) |
EP (1) | EP0043389B1 (fr) |
AT (1) | ATE9768T1 (fr) |
CA (1) | CA1175341A (fr) |
DD (1) | DD201757A5 (fr) |
DE (1) | DE3069413D1 (fr) |
SU (1) | SU1032994A3 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103527916A (zh) * | 2013-10-21 | 2014-01-22 | 青岛海信电器股份有限公司 | 一种待冲压金属件 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3324680A1 (de) * | 1983-07-08 | 1985-01-24 | DAKO-Werkzeugfabriken David Kotthaus GmbH & Co KG, 5630 Remscheid | Verfahren zum feinschneiden von werkstuecken und feinschneidwerkzeug zur ausuebung des verfahrens |
CN101274345B (zh) * | 2007-03-28 | 2011-12-21 | 鸿富锦精密工业(深圳)有限公司 | 金属壳体成型方法及其采用的旋切装置 |
DE102008026893A1 (de) | 2008-06-05 | 2009-12-10 | Schaeffler Kg | Verfahren zum Herstellen eines Käfigelements für einen Wälzlagerkäfig und Wälzlagerkäfig |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE511609C (de) * | 1928-11-03 | 1930-10-31 | Nat Machinery Co | Vorrichtung zur Herstellung von durchlochten Werkstuecken |
US1995466A (en) * | 1932-12-03 | 1935-03-26 | Bishop Frank | Punching mechanism |
DE1951811A1 (de) * | 1968-10-17 | 1970-05-21 | Western Electric Co | Verfahren und Einrichtung zum Lochstanzen |
DE1957011A1 (de) * | 1969-11-13 | 1971-05-27 | Fischer Brodbeck Gmbh Praez St | Stanzwerkzeug fuer Kleinlochungen |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1147364A (en) * | 1913-08-15 | 1915-07-20 | William S Bidle | Machine for making nut-blanks. |
GB411948A (en) * | 1932-12-31 | 1934-06-21 | David Etchells And Son Ltd | Improvements in, or relating to, nut forging machines |
FR1042580A (fr) * | 1950-05-23 | 1953-11-02 | L Morane Ets | Procédé de perçage de lingots métalliques et presse pour la mise en oeuvre de ceprocédé |
FR1112344A (fr) * | 1953-11-12 | 1956-03-13 | Kabel U Metallwerke Neumeyer A | Procédé et dispositif d'estampage à la presse, en particulier à froid, de pièces de forme à collerette, en métal, de préférence en acier |
US3174318A (en) * | 1958-01-23 | 1965-03-23 | Daniel M Fox | Method of forming articles from ductile materials |
US3232156A (en) * | 1963-12-26 | 1966-02-01 | Harrington & King Perforating | Multiple step perforating of sheet metal |
US3296905A (en) * | 1965-01-08 | 1967-01-10 | John S Killaly | Compressive stripping unit and indexing type nibbling punch for turret punch presses and the like |
DE1292110B (de) * | 1966-03-17 | 1969-04-10 | Schlegel | Geschlossenes Gesenk fuer Gesenkschmiedehaemmer und -pressen |
CH475805A (de) * | 1967-06-05 | 1969-07-31 | Feintool Ag | Feinschnittstanzwerkzeug |
DE2034043A1 (de) * | 1970-07-09 | 1972-01-13 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | Vorrichtung zur spanlosen Herstellung von Kegelzahnrädern |
US3788177A (en) * | 1971-07-02 | 1974-01-29 | R Williamson | Forming tool and fixture therefor |
US3971275A (en) * | 1975-09-18 | 1976-07-27 | Mach John J | Nestable die alignment means for punch press machines |
US4277994A (en) * | 1977-10-17 | 1981-07-14 | Gargrave Robert J | Matrix element |
US4299112A (en) * | 1977-10-20 | 1981-11-10 | Kabushiki Kaisha Wako | Method and device for producing synchronizer ring |
JPS56163048A (en) * | 1980-05-21 | 1981-12-15 | Wako:Kk | Precision die forging method |
-
1980
- 1980-07-08 EP EP80200663A patent/EP0043389B1/fr not_active Expired
- 1980-07-08 AT AT80200663T patent/ATE9768T1/de not_active IP Right Cessation
- 1980-07-08 DE DE8080200663T patent/DE3069413D1/de not_active Expired
-
1981
- 1981-06-23 SU SU813301193A patent/SU1032994A3/ru active
- 1981-07-01 US US06/279,560 patent/US4509395A/en not_active Expired - Fee Related
- 1981-07-01 DD DD81231374A patent/DD201757A5/de unknown
- 1981-07-08 CA CA000381367A patent/CA1175341A/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE511609C (de) * | 1928-11-03 | 1930-10-31 | Nat Machinery Co | Vorrichtung zur Herstellung von durchlochten Werkstuecken |
US1995466A (en) * | 1932-12-03 | 1935-03-26 | Bishop Frank | Punching mechanism |
DE1951811A1 (de) * | 1968-10-17 | 1970-05-21 | Western Electric Co | Verfahren und Einrichtung zum Lochstanzen |
DE1957011A1 (de) * | 1969-11-13 | 1971-05-27 | Fischer Brodbeck Gmbh Praez St | Stanzwerkzeug fuer Kleinlochungen |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103527916A (zh) * | 2013-10-21 | 2014-01-22 | 青岛海信电器股份有限公司 | 一种待冲压金属件 |
CN103527916B (zh) * | 2013-10-21 | 2016-05-11 | 青岛海信电器股份有限公司 | 一种待冲压金属件 |
Also Published As
Publication number | Publication date |
---|---|
CA1175341A (fr) | 1984-10-02 |
ATE9768T1 (de) | 1984-10-15 |
US4509395A (en) | 1985-04-09 |
SU1032994A3 (ru) | 1983-07-30 |
EP0043389A1 (fr) | 1982-01-13 |
DD201757A5 (de) | 1983-08-10 |
DE3069413D1 (en) | 1984-11-15 |
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