EP2303488B1 - Method and device for producing fine-blanked parts from a material strip - Google Patents

Method and device for producing fine-blanked parts from a material strip Download PDF

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Publication number
EP2303488B1
EP2303488B1 EP20090772089 EP09772089A EP2303488B1 EP 2303488 B1 EP2303488 B1 EP 2303488B1 EP 20090772089 EP20090772089 EP 20090772089 EP 09772089 A EP09772089 A EP 09772089A EP 2303488 B1 EP2303488 B1 EP 2303488B1
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EP
European Patent Office
Prior art keywords
strip
cutting
die
fine blanking
plate
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.)
Active
Application number
EP20090772089
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German (de)
French (fr)
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EP2303488A1 (en
Inventor
Willi Grimm
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.)
Feintool Intellectual Property AG
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Feintool Intellectual Property 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
Priority to EP20080012011 priority Critical patent/EP2140954B1/en
Application filed by Feintool Intellectual Property AG filed Critical Feintool Intellectual Property AG
Priority to PCT/EP2009/004364 priority patent/WO2010000389A1/en
Priority to EP20090772089 priority patent/EP2303488B1/en
Publication of EP2303488A1 publication Critical patent/EP2303488A1/en
Application granted granted Critical
Publication of EP2303488B1 publication Critical patent/EP2303488B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10Incompletely punching in such a manner that the parts are still coherent with the work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16Shoulder or burr prevention, e.g. fine-blanking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/04Processes
    • Y10T83/0448With subsequent handling [i.e., of product]
    • Y10T83/0467By separating products from each other
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/04Processes
    • Y10T83/0524Plural cutting steps
    • Y10T83/0529Blanking and cutting
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/04Processes
    • Y10T83/06Blanking
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/202With product handling means
    • Y10T83/2074Including means to divert one portion of product from another
    • Y10T83/2079Remaining or re-inserted product portion from base material

Abstract

The incomplete compound die cut along the circumference of the fine-blanked part is carried out with a specially shaped cutting edge of cutting punch (11) and/or cutting plate (5) such that the fine-blanked part (1) initially remains bonded to at least one partial connecting part on the material strip (2), either on the upper or lower plane at a level relative to the material strip. It is then moved together with the material strip in the running direction of the strip to a subsequent removal stage (ejector), in which the fine-blanked part and material strip are separated from each other perpendicular to the running direction of the material strip towards the bottom by braking the connecting part without a vertical shear force and without pressing, wherein the removed fine-blanked part (1) is fed through a chute (9) in the cutting plate.

Description

  • The invention relates to a method for producing fine blanking parts in a fine blanking tool, in which a strip of material between two tool parts from an upper press or guide plate and a lower cutting plate and an upper and lower cutting punch is clamped, the cutting in cooperation with the upper and lower Cutting punch as an incomplete section along the circumference of the fine cutting so that the fine cutting part at at least a partial connecting portion on the strip of material at its upper or lower level at an altitude relative to the strip of material initially bound cohesively and then together with the strip of material in the direction of the strip moved to a subsequent demolding stage with ejector and then the fine blanking part is removed from the tool interior in the direction of the strip of material.
  • The invention further relates to an apparatus for producing fine cutting parts from a strip of material with two tool parts of an upper press or guide plate and a lower cutting plate and an upper and lower cutting punch for clamping the strip of material and incomplete cutting of fine blank from the strip of material, wherein the fine blanking at least one partial connecting portion on the strip of material at its upper or lower level at an altitude relative to the strip of material initially remains firmly bonded, and a demolding stage with ejector.
  • State of the art
  • From the DE 10 2004 032 826 A1 is a method for producing stamped parts in a tool, in particular fine blanking tool, by means of at least one stamp, with which the stamped part is pushed out of a strip of material known. In this known method, the punched part is pushed from the material strip of this after being pressed out to a discharge. The punch cooperates with a counter-holder in an insert when pressing out the stamped part, wherein the counter-holder the stamped part is lifted when opening the tool to the surface of the insert and the strip of material from the insert. The strip of material is lifted by the cutting plate at a defined distance which corresponds at least to the thickness of the stamped parts.
  • Although this known prior art avoids the disadvantageous for Feinschneidteile pushing back the cutting part in the strip of material, but this advantage is bought by relative movements within the tool cavity perpendicular to the direction of the strip of material, which requires a complete opening of the tool and at the same time complicates the structure of the tool. Full opening of the tool requires a larger opening travel, which limits the number of press strokes. Therefore, this prior art can not be used on high-speed presses.
  • Other known solutions lead the stampings by separating devices (see DE 27 48 228 A1 ) or blowing off. Often the stamped part is pushed back into the strip of material and discharged with the strip of material. However, such a back pressure has the disadvantage that the high cut quality achieved by fine blanking is considerably worsened. The roughness of the smooth-cut functional surfaces and their tolerance accuracy suffer from the back pressure against the original cutting direction and by expressing significant quality losses.
  • From the generic JP 11309522 A a method for punching a stamped part of a plate-shaped strip material is known in which in a first cutting operation, the stamped part remains connected along its circumference with the strip material and in a second step, the semifinished product is finished with the main punch.
    Also in this known method, the tool must be fully opened, which leads to the limitation of the number of press strokes and limits the use of presses at low speeds.
  • In the DE-A-2 056 828 a precision punching method is disclosed in which two punching cut tools are used, of which one punch is stepped in the profile, wherein the gradation opposite to the second punch can take a positive and / or negative distance, such that sharp-edged, convex contours with materials low extensibility are generated and a crushing gaps is prevented.
  • task
  • In this prior art, the present invention seeks to improve a method and an apparatus for producing fineblanked parts such that a vertical relative movement between strip of material and fineblanking part is completely avoided, reduces the necessary opening and closing path of the device and simple structure the device is a use on high-speed presses possible, the fineblanking parts suffer no damage to the functional surfaces.
  • This object is achieved by a method of the type mentioned with the features of claim 1 and by an apparatus having the features of claim 8.
  • Advantageous embodiments of the method and the device are the dependent claims.
  • The solution according to the invention is characterized in that for cutting used in a recording of the insert insert with partially shaped bevels along the cutting edge and a Matrizeneinsatz associated cutting punch used and connected via at least one connection point with the strip of material fine blank and the material strip by a shearing force Breaking out with the ejector perpendicular to the running direction of the material stiffener be removed from the mold without pressing back down, wherein the demoulded fine cutting part is discharged through a chute in the cutting plate.
  • According to the method of the invention, the fine blanking part is cut to about 80 to 90% of its circumference completely from the strip of material. There are only individual connection areas or points between the fine blank and the strip of material.
    The fine blanking part is held after the unfinished complete cut on the material strip in particular by two or more connecting parts. These connection parts are arranged so that they do not come to lie in the area of the important functional surfaces of the fine blanking part during later breaking.
  • The connection points between the material strip and the fineblanking part are created by the special shape of the cutting edges of the inserts in conjunction with the kinematics of the fine blanking press used, which always moves independently of the thickness variations of the material strip in the same vertical position of the two decisive cutting edges.
  • In a recording of the cutting insert a die insert is used interchangeably, which is provided with partially shaped chamfers along their cutting edges and associated with the cutting punch.
    This has the extraordinary advantage that the Matrizeneinsatz is reusable by a front-side regrinding, the resulting by the regrinding height or material loss of Matrizeneinsatzes is easily compensated by one or more used in the recording records, which has economic benefits in the replacement management brings with it.
  • The die insert is held evenly biased along its circumference in the receptacle and projects beyond the base plate of the insert such that the die insert can selectively clamp the strip of material when closing the device on the punch, ie predetermined locations, without the base plate being able to engage. In other words, it is the usual surface clamps of the material strip between the upper and lower part avoided. This has the further advantage that the Feindschneidöl kept ready in the lubrication pockets not only the surface pressing is distributed unintentionally and then is no longer sufficient to cut available.
  • The concentration of fine-cutting-specific clamping forces on the die inserts also has the advantage that the production of smooth-cut separating surfaces on the fine-cutting part is supported.
  • A spring force applied to the fineblank part by an ejector ensures that the fineblank part and the material strip are kept free of tears when the tool is opened.
  • After demolding, the fine cutting part separated from the strip of material is removed vertically downwards to the running direction of the material strip by a drop stem in the cutting plate.
  • The inventive device is simple and compact and has the great advantage that the required way to open and close the upper and lower parts are significantly reduced. This is achieved in that in a receiving space of the cutting insert a force-locking under uniform bias Matrizeneinsatz is arranged, which is associated with the cutting punch, wherein the cutting edges of the die insert with a partially shaped chamfer for at least by a connecting pigtail on the material strip tailed cutting the fine cutting part the material strips are provided, and that the die insert relative to the cutting plate has a height offset for partial clamping of the strip of material on a press and guide plate and that in the demolding stage of the ejector for breaking the at least one partial connection point of the strip of material without transfer of a vertical shear force component to the connection point, and that in the cutting plate, a chute for discharging the separated fine cutting part is provided down to the direction of the strip of material.
  • The special shaping of the cutting edges of the die insert consists of a partially shaped chamfer, which can vary in length and / width and / or inclination and interrupts the cutting edge of the die insert accordingly, so that the fine cutting part of the strip of material is not completely cut out and at partial connection points on Material strip remains connected at its upper or lower level at an altitude relative to the material strip cohesively.
  • The space required for the transport of the composite of strips of material and fine blanking space within the interior of the device is achieved in that the die insert relative to the cutting plate has a height offset, which is dimensioned so that the required space for the material thickness downwardly protruding, however is still ensured on the strip of material fineblanking parts, so that the fineblanking parts can not be pushed back in the vertical direction or otherwise moved.
  • The protruding from the cutting plate When inserting the material strip, die inserts also allow a concentration of the fine cutting-specific clamping forces around the cutting geometry, which has the advantage that the quality of the parting surfaces on the fine cutting part can be improved.
  • The die insert is interchangeable and can also be used several times after regrinding. The height or material loss on the die insert resulting from regrinding can be very easily compensated for by documents of different thickness placed in the receiving space below the die insert, enabling flexible and cost-effective spare parts stocking with a high material utilization of the die inserts.
  • Another advantage is that the lubricant stored on the inlet side in lubricant pockets remains in the pockets when the material strip is clamped because only a punctiform clamping of the material strip occurs around the cutting geometry and the previously common planar clamping of the material strip between upper and lower and lower part of the device is eliminated.
  • The cutting punch is associated with a arranged in the press ram, tensioned by a spring assembly ejector, which when opening the tool, i. Running back of the press ram, by relaxing the spring pack prevents the at least one connecting section of the strip of material.
  • The inventive method and the inventive device are characterized by small opening and closing paths, so that high cycle rates and high Ausbringleistungen can be achieved, whereby the use of high-speed presses is made possible.
  • Further advantages and details will become apparent from the following description with reference to the accompanying drawings.
  • embodiment
  • The invention will be explained in more detail below using an exemplary embodiment.
  • It show the
  • 1a to 1d a simplified schematic representation of the sequence of the method according to the invention,
  • Fig. 2 a sectional view of the design of the connecting portion between fine blank and material strips on the one hand and the design of die insert and cutting punch on the other hand and
  • Fig. 3 a sectional view of the device according to the invention for preventing the demolition of the connecting portion of the strip of material.
  • With the inventive method to Fine cutting parts 1 of a strip of material 2, preferably locking parts for car seats, are produced. However, the method according to the invention is not limited to such parts and the parts may also have other geometric shapes.
  • The Fig. 1a shows the inventive device with inserted strips of material 2 in the open state of the upper tool part 3 and lower tool part 4. The lower tool part 4 includes a cutting plate 5, which has a receiving space 6 for receiving a Matrizeneinsatzes 7, wherein the cutting plate 5 fed on a base plate rests. The Matrizeneinsatz 7 is in the Fig. 1a shown as a tubular insert, but may also have other more complicated shapes. At its periphery of the die insert 7 is held for example by a screw, not shown in the cutting plate 5 under uniform bias, so that the forces occurring during cutting can be safely absorbed by die insert 7. The Matrizeneinsatz 7 is thus removed from the receiving space 6 of the cutting plate 5 and can be reground accordingly if necessary. By a placed in the receiving space 6 of the cutting plate 5 pad 8, the loss of height of the die insert 7 is compensated as a result of regrinding. It documents 8 are kept at different thicknesses, so that depending on the size of the regrinding different height losses can be compensated and the die insert 7 reaches the original height again.
  • Compared to the cutting plate 5, the die insert 7 has a height offset H, so that the Die insert 7 is well above the level of the cutting plate 5. This height offset H is dimensioned such that it corresponds approximately to the material thickness of the material strip 2. The upper tool part 3 and lower tool part 4 of the device according to the invention are opened so far that the imported material strip with the tailed fine cutting part 1 has sufficient space in the direction R of the material strip 2.
  • In the lower cutting plate 5 is the die insert 7 a chute 9 for discharging the fine cutting parts 1 is arranged approximately vertically downwards to the direction R of the material strip 2.
  • The die insert 7 is a punch 11 in the upper tool part 3 for cutting the fine blanking part 1 from the strip of material 2 and the chute 9 associated with an ejector 12.
    The upper tool part 3 includes a press or guide plate 10 in which at least one cutting punch 11 and at least one ejector 12 are guided.
  • Fig. 1b shows the closed upper tool part 3 and lower tool part 4 with clamped between die insert 7 and the guide plate 10 strips of material 2. The clamping takes place around the cutting geometry, so that the fine cutting specific clamping forces are concentrated on a narrow range. This supports the production of smooth-cut separating surfaces on the fine blanking part 1. By the relative to the cutting plate 5 higher placed die insert 7 remain in the insert arranged lubrication pockets 13 unaffected even in the clamped state of the material strip 2, whereby the lubricant supply is available in the pockets exclusively for the fine cutting process.
  • The Fig. 1c shows the step of the method according to the invention, in which the cutting punch 5 has performed an incomplete complete cut in the strip of material 2 and the fine part cutting part 1 is cut to about 80 to 90% of its circumference. It will be up now Fig. 2 Reference is made, in which the fine blanking part 1 remains connected to, for example, a narrow connecting portion 14 with the material strip 2 cohesively after the cut.
    The incomplete complete cut is achieved by a corresponding preparation of the cutting edges 15 of the die insert 7 in conjunction with the kinematics of the fineblanking press used, which always moves into the same vertical position of the cutting edges of die insert 7 and cutting punch 11, regardless of the thickness variations of the strip of material.
    The cutting edge 15 of the die insert 7 can be broken, for example, along its edge profile by one or more chamfers 16. Of course, it is part of the solution according to the invention if the width and / or length and / or inclination of these bevels vary. This depends on the size, geometry and their distribution on the die insert 7 and / or cutting punch 11 and on the thickness and quality of the material strip and on the allowable shape tolerances radially and axially at the attachment points of the fine blank 1, which by the dimensions h and i on the die insert 7 and the dimensions 1 and k on the cutting punch is illustrated. This also applies to the Einschertiefe T of the cutting punch 11 in the die insert. 7
  • In the Fig. 1d It is shown that the ejector 12 of the demolding stage has separated the connecting parts 14 between the fineblank 1 and strips of material 2 shearing force and fineblanking part 1 is discharged through the chute 9 perpendicular to the direction R of the strip of material 2 down. The connecting parts 14 are broken by the ejector 12 largely free of damage. Advantageously, the connecting parts 14 are distributed on the circumference of the fine blanking part 1 that they are not located on the functional surfaces of the fine blanking part.
  • The strip of material 1 forms after the cutting operation with the tailed fine cutting part 1 a composite that can be transported without any relative movement in the vertical direction with the device according to the invention open in the direction R to the demolding stage, because by the relative to the die insert 7 deeper placed cutting plate 5 sufficient Place of about the thickness of the material strip 2 down protruding fine cutting parts 1 is present. This is associated with the very great advantage that the necessary opening travel in the device according to the invention can be kept so small that the cycle numbers can be massively increased. This allows the use of high speed presses.
  • The Fig. 3 shows a section of the device according to the invention for preventing the demolition of the connecting portions 14 from the material strip 2 and the pressing back of the fine blanking part 1 in the material strip 2 when opening the tool, which is particularly advantageous for components with small Auswerferkräften.
  • The punch 11 is associated with an ejector 20 which is acted upon by pressure pins 21 with the counter-holding force FHG.
    In the press ram 17, a Einlegerring 18 is added, in which a spring assembly 19 is arranged that acts in the direction of the hydraulic counter-holding force FGH and thus supports them. When running back the press ram, ie when opening the tool, the spring pack 19 can relax, so that connecting section 14 between fine blank 1 and strips of material 2 intact, ie without demolition of the cutting plate, can be ejected. The cutting punch 11 and the guide plate 10 remain unchanged during this phase in its vertical position, whereby a pushing back of the fine cutting part 1 is prevented in the material strip 2.
  • LIST OF REFERENCE NUMBERS
  • Fine cutting part 1 strips of material 2 Upper tool part 3 Lower tool part 4 cutting board 5 Recording room in 5 6 die insert 7 document 8th chute 9 Press or guide plate 10 cutting punch 11 ejector 12 lubrication pocket 13 connecting part 14 cutting edge 15 chamfers 16 press ram 17 insert ring 18 spring assembly 19 ejector 20 pushpin 21 Backstop force F GH height offset H Einschertiefe T Running direction of the material strip 2 R Dimensions of chamfer 16 to 7 Hi Dimensions of bevel 16 at 12 l, k

Claims (12)

  1. Method for producing fine blanking parts in a fine blanking tool, wherein a material strip (2) is clamped between two tool parts (3,4) respectively between an upper pressure pad or guiding plate (10)n and a lower cutting die (5) as well as between an upper shearing punch (11) and a lower shearing punch and the cutting is carried out in cooperation with the upper and lower shearing punches, wherein the cutting is realized as an incomplete compound die alongside the circumference of the fine blanking part (1) with a specially formed cutting edge of the shearing punch and/or the cutting die in such a way, that the fine blanking part (1) for the time being at partial connecting sections (14) stays materially connected to the material strip with an elevation with regard to the material strip possibly at its upper or lower plane and then together with the material strip is moved in the moving direction (R) of the strip (2) until a following removal stage with an elector (12) and then the blanking part (1) is unloaded from the inner of the tool in direction (R) of the material strip (2), characterized in that for cutting are used a die-plate inset (7), which can be positioned in a seating (6) of the cutting die (5), and an allocated to the die-plate inset (7) shearing punch (11) with partially shaped bezels (16) along their cutting edges, wherein the fine blanking part (1) at least connected to the sections (14) of the material strip (2) is removed downwards perpendicular to the moving direction(R) of the material strip (2) with the elector (12)) by means of fracturing without shearing force and pressing back, wherein the removed fine blanking part (1) is removed through a falling passage (9) in the cutting die (5).
  2. Method according to claim 1, characterized in that the fine blanking part (1) up to 80 to 90 % of its circumference is completely cut out of the material strip (2).
  3. Method according to claims 1 and 2, characterized in that the fine blanking part (1) after the incomplete compound die is hold at the material strip (2) by at least one, in special cases by two or more, connection section/s (14).
  4. Method according to claim 1, characterized in that the die-plate inset (7) due to resharpening the face side can be used repeatedly, wherein the loss of height respectively the loss of material of the die-plate inset (7) created by the resharpening process is compensated by one or more spacers ((9 set into the seating (6) of the cutting die (5).
  5. Method according to claim 1, characterized in that the die-plate inset (7) alongside its circumference is uniformly prestressed due to the shape matched to the geometry of the fine blanking part (1).
  6. Method according to claims 1 to 5, characterized in that the clamping of the material strip (2) between upper and lower tool parts (3,4) is realized by solely the die-plate inset (7).
  7. Method according to claim 1, characterized in that the fine blanking part (1) and the material strip (2) are holded free from breaking by means of a spring force created by an elector (20) at opening of the tool.
  8. Device for producing fine blanking parts from a material strip according to claim 1 with two tool parts (3,4) respectively between an upper pressure pad or guiding plate (10) and a lower cutting die (5) as well as between an upper shearing punch (11) for clamping the material strip (2) and for cutting out incompletely the fine blanking part (1) from the material strip (2) wherein the fine blanking part (1) and the material strip (2) are after the cutting process are materially connected by partial connecting sections (14) and that the die-plate inset (7) with regard to the cutting die (5) has an elevation to partially clamp the material strip (2) at a pressure pad or guiding plate (10) the fine blanking part (1), and removal stage with an elector (12), characterized in that in a seating (6) of the cutting die (5) is located a die-plate inset (7) nonpositively hold under uniform prestress to which is allocated the shearing punch (12), wherein the cutting edges (15) of the die-plate inset (7) are interrupted by a partially shaped bevel (16) for incompletely cutting out the fine blanking part (1) for at least connected to the sections (14) of the material strip (2), and that the die-plate inset (7) with regard to the cutting die (5) has an elevation (H) to partially clamp the material strip (2) at the pressure pad and guiding plate (10) and that the elector (12) in the removal stage is provided for braking out at least a partially connection section (14) without shearing force from the material strip (2), and that in the cutting die (5) is provided a falling passage (9) for perpendicularly with regard to the moving direction (R) of the material strip (2) downwards removing the fine blanking (1) broken off the material strip (2).
  9. Device according to claim 8, characterized in that the bevels (16) have a different length and/or width and/or angularity.
  10. Device according to claim 8, characterized in that the die-plate inset (7) is exchangeable.
  11. Device according to claim 8, characterized in that one or several positioned in the seating (6) under the die-plate inset (7) spacers (8) of different thickness are provided to compensate the material and height loss created by resharpening the die-plate inset.
  12. Device according to claim 8, characterized in that an elector (20) associated to the shearing punch (11) and prestressed by an spring packet (19) arranged in the ram (17) of the press is provided to prevent a breaking off at least one connection section (14) from the material strip (2) through relaxation of the spring packet (19) at opening the tool, i.e. running back of the ram (17).
EP20090772089 2008-07-03 2009-06-17 Method and device for producing fine-blanked parts from a material strip Active EP2303488B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20080012011 EP2140954B1 (en) 2008-07-03 2008-07-03 Method and device for manufacturing finely cut sections from a strip of material
PCT/EP2009/004364 WO2010000389A1 (en) 2008-07-03 2009-06-17 Method and device for producing fine-blanked parts from a material strip
EP20090772089 EP2303488B1 (en) 2008-07-03 2009-06-17 Method and device for producing fine-blanked parts from a material strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090772089 EP2303488B1 (en) 2008-07-03 2009-06-17 Method and device for producing fine-blanked parts from a material strip

Publications (2)

Publication Number Publication Date
EP2303488A1 EP2303488A1 (en) 2011-04-06
EP2303488B1 true EP2303488B1 (en) 2012-02-08

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EP20080012011 Expired - Fee Related EP2140954B1 (en) 2008-07-03 2008-07-03 Method and device for manufacturing finely cut sections from a strip of material
EP20090772089 Active EP2303488B1 (en) 2008-07-03 2009-06-17 Method and device for producing fine-blanked parts from a material strip

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EP20080012011 Expired - Fee Related EP2140954B1 (en) 2008-07-03 2008-07-03 Method and device for manufacturing finely cut sections from a strip of material

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US (1) US8910549B2 (en)
EP (2) EP2140954B1 (en)
JP (1) JP5698125B2 (en)
AT (2) AT524251T (en)
WO (1) WO2010000389A1 (en)

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US8910549B2 (en) 2014-12-16
EP2140954B1 (en) 2011-09-14
WO2010000389A1 (en) 2010-01-07
AT524251T (en) 2011-09-15
JP2011526212A (en) 2011-10-06
US20110132162A1 (en) 2011-06-09

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