EP4201548B1 - Outil de poinçonnage - Google Patents

Outil de poinçonnage

Info

Publication number
EP4201548B1
EP4201548B1 EP22020620.5A EP22020620A EP4201548B1 EP 4201548 B1 EP4201548 B1 EP 4201548B1 EP 22020620 A EP22020620 A EP 22020620A EP 4201548 B1 EP4201548 B1 EP 4201548B1
Authority
EP
European Patent Office
Prior art keywords
die
cylinder
adapter
punching tool
magnetic
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
EP22020620.5A
Other languages
German (de)
English (en)
Other versions
EP4201548A1 (fr
Inventor
Klaus Pfeifer
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.)
Alfra GmbH
Original Assignee
Alfra GmbH
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 Alfra GmbH filed Critical Alfra GmbH
Publication of EP4201548A1 publication Critical patent/EP4201548A1/fr
Application granted granted Critical
Publication of EP4201548B1 publication Critical patent/EP4201548B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B21D28/343—Draw punches
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides
    • B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/003—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass in punching machines or punching tools
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices
    • B21D45/04—Ejecting devices interrelated with motion of tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/14—Punching tools; Punching dies

Definitions

  • the invention relates to a stamping tool for mobile use which has improved handling compared to conventional stamping tools.
  • Hydraulic or pneumatic punch presses designed for mobile use are intended to remedy this problem.
  • the punch is connected to the hydraulic cylinder by a screw or bolt, and the material to be punched must already have a pre-drilled hole through which the screw or bolt is inserted. The punch is thus drawn directly into the die.
  • the necessity of the pre-drilled hole is often cited as a disadvantage.
  • EP 3 025 824 B1 a mobile hydraulic tool with a drive piston that can be hydraulically adjusted between a starting position and an end position, a hydraulic tool housing having a cylinder section that guides the drive piston and a pulling or pushing tool unit that can be detachably connected to the drive piston and the hydraulic tool housing.
  • US 2012/255184 A1 which forms the basis for the preamble of claim 1, US 4 793 063 A , and US 5 327 631 A , all reveal a stamping tool with magnetic holding devices.
  • the present invention is therefore based on the objective of providing an improved stamping tool for mobile use, in which no parts of an assembly can fall off, even in the case of careless operation.
  • the cylinder (11) is a hydraulic or pneumatic cylinder designed to draw the punch (19) into the die (17) by means of an adapter (13a) and a fastening means (13b) attached thereto.
  • the adapter (13a) serves to establish a connection between the fastening means (13b) and the cylinder (11).
  • the fastening means (13b) is anchored on one side in the adapter (13a), on its side opposite the cylinder (11) it has a device for force-fit connection of the punch (19).
  • the spacer bushing (15) compensates for height differences in order to optimize the positioning of the punch (19) and, if necessary, to compensate for the difference of a stepped fastening element (13b).
  • the "first magnetic means" (21) are in particular one or more magnets which are provided in at least one of two adjacent components.
  • the arrangement of the first magnetic means (21) can be radial or axial.
  • the components are made of a ferromagnetic material, magnets in one of the two components are sufficient; if the components are not made of a ferromagnetic material, at least ferromagnetic sections must be incorporated opposite the magnet(s) in the components.
  • the present invention has the initial advantage that the spacer sleeve (15) is held in a simple manner on the cylinder (11) by the first magnetic means (21), the spacer sleeve (15) in turn holding the assembly consisting of the adapter (13a) with the fastening means (13b) attached thereto.
  • the spacer sleeve (15) is held in a simple manner on the cylinder (11) by the first magnetic means (21), the spacer sleeve (15) in turn holding the assembly consisting of the adapter (13a) with the fastening means (13b) attached thereto.
  • the punching tool (1) according to the invention can be used and modified independently of the shape of the opening to be punched. In particular, it can be used for all round, angular and/or special-shaped tool contours.
  • the die (17) is held on the spacer sleeve (15) by second magnetic means (23).
  • the second magnetic means (23) are essentially designed like the first magnetic means (21).
  • the die (17) is held on the spacer bushing (15) by mechanical means.
  • These mechanical means can be formed, for example, from screw connections or bayonet fittings.
  • the spacer bushing (15) preferably has an extended passage (153) which, on the one hand, carries the mechanical means for holding the die (17). On the other hand, the extended passage (153) also ensures more uniform and stable guidance of the fastening element (13b).
  • the first magnetic means (21) are arranged in the end face (111) or on the lateral surface of the cylinder (11). Both arrangements are equivalent according to the invention, the choice depending on the size of the stamping tool or the materials used. This further development increases the variability of the present invention.
  • recesses (157) can be provided in the end surface (155) of the spacer sleeve (15) facing the cylinder (11), i.e., in the side of the component opposite the magnetic field. The components can then be easily removed from each other, for example, by simply rotating them.
  • the second magnetic means (23) in the end face (159) or on the lateral surface of the A spacer bushing (15) is arranged. Both arrangements are equivalent according to the invention, the choice depending on the size of the stamping tool or the materials used. This further development increases the variability of the present invention.
  • recesses can be provided in the end face (175) of the die (17) facing the spacer bushing (15), i.e., in the side of the component opposite the magnetic field.
  • the components can then be easily removed from each other, for example, by simply rotating them.
  • the adapter (13a) and the fastening means (13b) can be permanently connected to each other.
  • a special embodiment of the stamping tool (1) according to the invention provides that the adapter (13a) and fastening means (13b) are designed in two parts and that the fastening means (13b) has at least one projection (13b1) which is arranged inside the cavity (171) of the die (17) in the assembled state.
  • the individual fastening element (13b) is first guided through the die (17) until the projection (13b1) rests within the cavity (171). Subsequently, the fastening element (13b) guided through the die (17) is guided through the existing spacer sleeve (15) before being connected to the adapter (13a). Finally, the adapter (13a) is anchored in the cylinder (11).
  • the fastening means (13b) is a screw.
  • stamping waste described above is solved in another embodiment of the invention by the fact that, due to the first magnetic means (21) and/or the second magnetic means (23), a material to be stamped is removed from the material.
  • the waste piece punched out of the die can be ejected. In particular, with sufficient magnetic force, the waste piece can be pushed out of the die.
  • the stamping tool 1 belongs to the category of mobile hydraulic/pneumatic tools, which exist in various configurations in the prior art.
  • the tool unit is the adapter 13a with a fastening element 13b attached to it, which in turn carries the die 17 and punch 19 for the actual stamping process.
  • Figure 1 shows the stamping tool 1 according to a first embodiment in a schematic, partially cut-away exploded view.
  • the adapter 13a which is connected to the drive piston (not shown), is inserted into the cylinder 11.
  • the fastening element 13b is positively engaged in the adapter 13a, for example by screwing it in place.
  • the adapter 13a and the fastening element 13b are designed as a single component and are permanently and firmly connected to each other.
  • the fastening element 13b is pushed through the opening 153 of the spacer sleeve 15 with its end facing away from the cylinder 11 until the adapter 13a rests in the receiving opening 151.
  • the spacer sleeve 15 is held on the cylinder by the first magnetic means 21.
  • permanent magnets e.g., neodymium magnets
  • These permanent magnets can be flush with the end face 111 for maximum magnetic force.
  • the permanent magnets can be positioned slightly deeper than the end face 111, thus reducing the magnetic force on the spacer sleeve 15 to be held. In this way, different magnetic forces can be achieved depending on the size and weight of the spacer sleeve 15 and the other components to be attached.
  • the die 17 is now pushed over the free end of the fastening element 13b, so that the fastening element 13b extends through its opening 173 and the cavity 171.
  • the die 17 is connected to the first magnetic element 21 via second magnetic means 23.
  • the stamping tool 1 according to the invention which is largely assembled in this way, can now be brought to the material to be stamped and positioned as a force-fit connected assembly without any of the components being able to fall off.
  • the still free outer end of the fastening element 13b is now guided through a pre-drilled hole in the material to be punched and the punch 19 is attached to the fastening element 13b from the opposite side, for example by screwing it on.
  • the punch 19 is now drawn through the material to be punched into the cavity 171 and punches out the desired opening.
  • Figure 1 shows the stamping tool 1 according to a second embodiment alternative to the first embodiment in a schematic, partially cut-away exploded view.
  • Figure 2 is largely identical to Figure 1 , so that the basic structure does not need to be described again.
  • adapter 13a and fastener 13b are designed in two parts. Furthermore, fastener 13b has at least one projection 13b1, which, when assembled, is located within the cavity 171 of the die 17.
  • the extruded waste piece of the punched material is located in the cavity 171 of the die 17, where it can become stuck depending on the type of material, its thickness, and other factors. Removing the waste piece from the die of a conventional punching tool may require additional tools or auxiliary devices, which can be quite time-consuming.
  • the waste piece can be reached very easily by sliding the fastening means 13b, whereby the projection 13b1 engages behind the waste piece and pushes it out of the die 17.
  • the die 17 is not held on the spacer bushing 15 by second magnetic means 23, but by mechanical means, which is not covered by the claims.
  • These mechanical means can, for example, consist of a screw connection or a bayonet fitting.
  • the die 17 can also be held on the spacer bushing 15 by second magnetic means 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (6)

  1. Outil de poinçonnage (1) pour une utilisation mobile, comprenant
    - un cylindre (11),
    - un adaptateur (13a) avec un moyen de fixation (13b) fixé à celui-ci, l'adaptateur (13a) pouvant être introduit au moins partiellement dans le cylindre (11) à son premier bout,
    - une douille d'écartement (15), laquelle présente une ouverture de réception (151) pour l'adaptateur (13a) et un passage (153) pour le moyen de fixation (13b),
    - une matrice (17), laquelle présente un passage (173) pour le moyen de fixation (13b) et une cavité (171), et
    - un poinçon (19), qui peut être relié au moyen de fixation (13b),
    la matrice (17) étant maintenue par des deuxièmes moyens magnétiques (23) sur une douille d'écartement (15) et
    les deuxièmes moyens magnétiques (23) étant disposés dans la face frontale (159) ou sur la surface latérale d'une douille d'écartement (15),
    caractérisé en ce que la douille d'écartement (15) est maintenue par des premiers moyens magnétiques (21) sur le cylindre (11), les premiers moyens magnétiques (21) étant disposés dans la face frontale (111) ou sur la surface latérale du cylindre (11).
  2. Outil de poinçonnage (1) selon la revendication 1, dans lequel des évidements (157) sont prévus dans la face d'extrémité (155) de la douille d'écartement (15) orientée vers le cylindre (11).
  3. Outil de poinçonnage (1) selon la revendication 1, dans lequel des évidements sont prévus dans la face d'extrémité (175) de la matrice (17) orientée vers la douille d'écartement (15).
  4. Outil de poinçonnage (1) selon l'une des revendications 1 à 3, dans lequel l'adaptateur (13a) et
    le moyen de fixation (13b) sont réalisés en deux parties et le moyen de fixation (13b) présente au moins une saillie (13b1) qui, à l'état monté, est disposée à l'intérieur de la cavité (171) de la matrice (17).
  5. Outil de poinçonnage (1) selon l'une des revendications 1 à 4,
    dans lequel le moyen de fixatio(13b) est une vis.
  6. Outil de poinçonnage (1) selon l'une des revendications 1 à 5,
    dans lequel, en raison des premier moyens magnétiques (21) et/ou des deuxièmes moyens magnétiques (23), un déchet poinçonné dans le matériau à poinçonner peut être expulsé de la matrice (17).
EP22020620.5A 2021-12-23 2022-12-22 Outil de poinçonnage Active EP4201548B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021134528.6A DE102021134528B3 (de) 2021-12-23 2021-12-23 Stanzwerkzeug für den mobilen Einsatz

Publications (2)

Publication Number Publication Date
EP4201548A1 EP4201548A1 (fr) 2023-06-28
EP4201548B1 true EP4201548B1 (fr) 2026-02-18

Family

ID=86498063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22020620.5A Active EP4201548B1 (fr) 2021-12-23 2022-12-22 Outil de poinçonnage

Country Status (3)

Country Link
US (1) US12544820B2 (fr)
EP (1) EP4201548B1 (fr)
DE (1) DE102021134528B3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1074765S1 (en) 2023-11-27 2025-05-13 Benjamin R. Willemstyn Hole punching assembly
USD1074766S1 (en) 2023-11-27 2025-05-13 Benjamin R. Willemstyn Hole punching assembly
GB202408450D0 (en) * 2024-06-13 2024-07-31 Black & Decker Inc Portable electric knockout punch

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5327631A (en) * 1992-06-29 1994-07-12 Lincavage George P Roll pin punch kit apparatus

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Publication number Priority date Publication date Assignee Title
US3056203A (en) * 1960-03-08 1962-10-02 Calkins Eugene Moses Power driven hole cutter
US3641860A (en) * 1969-11-14 1972-02-15 Lawrence V Whistler Sr Punch retainer assembly
US4403417A (en) 1982-06-04 1983-09-13 Wilson Stephen K Draw punch
US4793063A (en) * 1987-03-31 1988-12-27 Ducret Lucien C Punch gun
IT1395812B1 (it) 2009-09-29 2012-10-26 Teseo Spa Fustella per la lavorazione di pelli e sistema per il bloccaggio amovibile della stessa ad un albero di una macchina per la lavorazione di pelli
US9393711B2 (en) * 2011-04-11 2016-07-19 Milwaukee Electric Tool Corporation Hand-held knockout punch driver
US9254526B2 (en) * 2011-12-09 2016-02-09 Textron Innovations Inc. Punch profile for a punch, and the assembly in which the punch is used
DE102012101894A1 (de) * 2012-03-06 2013-09-12 Tkr Spezialwerkzeuge Gmbh Werkzeugverbindung
US20140208558A1 (en) * 2013-01-28 2014-07-31 Production Products, Inc. Rammer tool
DE102014117403A1 (de) 2014-11-27 2016-06-02 Tkr Spezialwerkzeuge Gmbh Mobiles Hydraulikwerkzeug
US10532481B2 (en) * 2015-11-25 2020-01-14 Ridge Tool Company Punch tool system
EP3917734A4 (fr) 2019-01-30 2022-11-09 Black & Decker Inc. Mécanismes de raccordement rapide pour ensembles goujons de traction
US20210094086A1 (en) * 2019-10-01 2021-04-01 Michael Edward Laut Center Punch Driver for Positioning a Fastener

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5327631A (en) * 1992-06-29 1994-07-12 Lincavage George P Roll pin punch kit apparatus

Also Published As

Publication number Publication date
DE102021134528B3 (de) 2023-06-29
US12544820B2 (en) 2026-02-10
US20230201905A1 (en) 2023-06-29
EP4201548A1 (fr) 2023-06-28

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