EP2522443A2 - Method for defining a punching tool set for punching of work pieces and punching machine with such a punching tool set - Google Patents
Method for defining a punching tool set for punching of work pieces and punching machine with such a punching tool set Download PDFInfo
- Publication number
- EP2522443A2 EP2522443A2 EP20120179637 EP12179637A EP2522443A2 EP 2522443 A2 EP2522443 A2 EP 2522443A2 EP 20120179637 EP20120179637 EP 20120179637 EP 12179637 A EP12179637 A EP 12179637A EP 2522443 A2 EP2522443 A2 EP 2522443A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- punching
- punch
- die
- punching die
- machining program
- 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
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Classifications
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- 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
- B21D37/08—Dies with different parts for several steps in a process
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- 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
- B21D28/14—Dies
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- 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
- B21D28/246—Selection of punches
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- 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
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- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49716—Converting
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- 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
- Y10T83/0524—Plural cutting steps
-
- 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
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8727—Plural tools selectively engageable with single drive
-
- 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
- Y10T83/869—Means to drive or to guide tool
- Y10T83/8733—Tool movable to cooperate selectively with one of a plurality of mating tools
-
- 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
- Y10T83/929—Tool or tool with support
- Y10T83/9411—Cutting couple type
- Y10T83/9423—Punching tool
Definitions
- the invention further relates to a computer program product comprising coding means which are adapted to carry out the above machining program and a method for punching machining of workpieces, in particular sheets.
- US 6,401,056 B1 describes the collection of information about punches during tool life. Included are, among other things, regrinding operations on punching dies as well as the size-related development of the punching die height associated with the regrinding.
- the acquired tool data is to enable the tool user to determine the time at which a punching tool must be repaired or replaced.
- stamping dies are generally used with a die opening, the wall of which runs under a so-called "clearance angle" with respect to the wall of the stamping punch dipping into the die opening.
- the clearance angle is intended to ensure that the punched out material reliably leave the punching die and that the punch can return to its original position without hindrance after penetrating the workpiece to be machined and the associated immersion in the die opening of the punching die.
- the clearance angle on punching dies would be as large as possible.
- Regrinding of punching dies is carried out in particular due to signs of wear on the die cutting edge and is connected to the punching die with a material removal in the dipping direction of the punch. With the material removal goes due to the Angular clearance associated with an enlargement of the cross section of the die opening at the level of Matrizenschneidkante ("die cutting edge cross section").
- die cutting edge cross section is decisive for the assignment of the punching die to a cooperating punch ("stamping punch assignment") or for the thickness of the workpiece which can be machined by means of the punching die and the punch punch associated therewith ("workpiece thickness assignment").
- a cutting gap with a gap width depending on the material thickness to be processed ideally remains between the die cutting edge of the punching die and the punch.
- a punching tool set is provided for this purpose which comprises a round punch with a diameter of 5 mm and a punching die with a circular die opening whose die cutting edge has a diameter of 5.2 mm.
- the punching tool users are kept for individual processing tasks, such as a specific sheet thickness and a specific punch diameter, punching tool sets that are designed specifically for the respective machining task. Regrinding of the punching die of such a punching tool set, for example due to wear on the die cutting edge, is only provided to an extent in which the enlargement of the die cutting edge cross section associated with the regrinding of the cutting die does not lead to an engagement between the die cutting edge and the associated punch further cutting gap results.
- the die cutting edge cross-section already expands due to a slight regrinding of the punching die to a value which, given the punching punch, must not be exceeded in the interest of high-quality machining results. In the case of an excessively wide cutting gap, only lower quality machining results would be possible by means of the punching tool set. If the size of the Matrizen cutting edge cross section has reached its limit, it is usually apart from further regrinding and instead removed the punching die from the inventory and scrapped.
- the change of the die cutting edge cross-section associated with the post-processing is taken into account when assembling a punching tool set from a punch and from a punching die produced by post-processing of a precursor punching die.
- the die cutting edge cross section of the punching die (created by post processing) results from the change in the die cutting edge cross section associated with the postprocessing.
- This "current" die cutting edge cross-section forms the basis for the punch stamp assignment and / or the workpiece thickness assignment of the punching die. It is conceivable that the punching die is assigned to a different punch than the predecessor punching die due to the post-processing and the associated material removal.
- the punching die another Workpiece thickness to be assigned as the predecessor punching die.
- the post-processed, in particular the reground punching die is also used to assemble punching tool sets.
- the cancellation according to the invention of a rigid bonding of punching dies to certain punches and / or to certain workpiece thicknesses results in a maximization of the service life of the punching dies.
- the punching tool sets defined in the described manner are to be arranged on the punching device of a punching machine such that they can perform the desired workpiece machining.
- the height of the punch die measured in the direction of insertion of the punch decreases and the die cutting edge shifts accordingly.
- the height position of the die cutting edge on the top of the punch die facing the punch is important for workpiece machining in several respects.
- the height of the die cutting edge is required in order to be able to measure the amount of the punching stroke to be executed by the punch. It must also be ensured that the top side of the punching die does not protrude above a workpiece support on which the workpiece is mounted in the surroundings of the punching device, for example during subsequent movements which the workpiece performs between individual punching strokes relative to the punching device.
- the above aspects are taken into account when setting up the punching device of a punching machine by the punching die is positioned on the punching device of the punching machine in the dipping direction of the associated punch depending on the amount of material removal during the post-processing.
- the height adjustment of the punching die on the punching device of the punching machine is carried out by means of a corresponding lifting device of the punching machine as a function of the amount of material removal in the post-processing of the punching die.
- a punching die associated punch is part of a punch assembly comprising a plurality of punches.
- the controlled by the machining program setting device serves to position the punch assembly and the punching die relative to each other such that the punching die and the punch of the defined punching tool set in cooperation can perform the relevant workpiece machining.
- the punching die is part of a punching die assembly comprising a plurality of punching dies.
- the punching die assembly on the one hand and the punch of the defined punching tool set on the other hand are positioned so that the punching die of the defined punching tool set and the associated punch are functional.
- the machining program according to the invention is performed numerically controlled.
- the subject of claim 11 is a provided for this purpose computer program product. If the machining program according to the invention runs on a numerical control of the punching machine, the claimed lifting device and the adjusting device according to the invention are controlled in the sense of the invention.
- the machining program according to the invention in a method for punching machining of workpieces, in particular sheets, integrated.
- the change in the die cutting edge cross section associated with machining the precursor die may be of a different nature.
- the reason for a change in the size of the die cutting edge cross-section caused by the post-processing can be a clearance angle under which the wall of the die opening runs on the predecessor punch die with respect to the wall of the punch piercing the die opening.
- the punch stamp assignment and / or the workpiece thickness assignment of the punching die according to the invention in dependence on the amount of the clearance angle (claim 8).
- the dimensional change of the die cutting edge cross-section associated with the post-processing Based on the dimensional change, starting from the original Size of the die cutting edge cross section are determined as a result of the post-processing adjusting size of the die cutting edge cross-section.
- the machining-related change of the die cutting edge cross section is in a change in shape. Accordingly, the punch stamp assignment and / or the workpiece thickness assignment is made in response to the change in the shape of the die cutting edge cross section associated with the finishing operation.
- Fig. 1 has a punching machine 1 for punching machining workpieces in the form of sheets 2, a C-shaped machine frame 3 with an upper frame leg 4 and a lower frame legs 5.
- a conventional coordinate guide 7 is housed in a pharynx 6 of the machine frame 3.
- this includes a transverse rail guide 8 and a transverse rail 9 guided thereon.
- the transverse rail guide 8 can be moved jointly with the transverse rail 9 in the direction of a horizontal ⁇ axis by means of a drive motor, not shown.
- the cross rail 9 can be moved by means of a likewise not shown drive motor along the transverse rail guide 8 in the direction of a horizontal and thereby perpendicular to the ⁇ -axis extending x-axis.
- cross rail 9 clamping claws 10 of conventional design for holding a sheet 2 are provided.
- the cross rail 9 serves as a tool magazine.
- 9 tool holder 11 are releasably attached to the cross rail.
- a tool holder 11 is in Fig. 6 shown.
- the punching station 12 is a Monostanzkopf. Accordingly, the punching station 12 includes tool bearings in the form of an upper tool holder 13 on the upper frame leg 4 and in the form of a lower tool holder 14 on the lower frame leg fifth
- a punch 15 and in the lower tool holder 14 a punching die 16 are loaded into the upper tool holder 13. Together, the punch 15 and the punching die 16 form a punching tool set 17.
- the punching die 16 is in detail in the FIGS. 2a, 2b, 2c shown.
- Fig. 6 shows the punching die 16 in combination with the punch 15.
- An electric rotary / lifting drive 18 of the punching machine 1 comprises an upper electrical rotary / lifting drive unit 19 and a lower electric rotary / lifting drive unit 20.
- the punching tool which is inserted into the upper tool holder 13, in the present case the punch 15, along a running in the direction of a vertical z-axis lifting axis 21 and lowered and also rotated in a direction of rotation 22 illustrated by a double arrow about the lifting axis 21.
- the punching tool inserted into the lower tool holder 14, here: the punching die 16 can be moved by means of the lower rotary / lifting drive unit 20 move translationally along the lifting axis 21 and rotate in the direction of rotation 22 about the lifting axis 21.
- FIGS. 2a, 2b is the punching die 16 of conventional design. It has a circular cutting edge 24 which in the illustrated case is circular, which in turn delimits a die opening 25 with a circular cross section.
- the die opening 25 extends in the installed position on the punching machine 1 in the direction of the lifting axis 21. Along the lifting axis 21 of the punch 15 dives in the sheet metal processing in the die opening 25 a.
- An arrow 26 points in FIG. 2b
- the die cutting edge 24 of the punching die 16 and a corresponding circular punch cutting edge act under stamping processing of the sheet 2 concerned together in the punching sheet metal processing.
- the die opening 25 widens in the dipping direction 26, forming a clearance angle ⁇ , which is greatly oversubscribed. Accordingly, the die opening 25 has a frusto-conical shape.
- the clearance angle ⁇ is to ensure that punched slugs which are punched out of a machined sheet 2 by means of the die cutting edge 24 function reliably out of the punching die 16 at the bottom.
- the punching die 16 has resulted by post-processing a predecessor punching die 16 'with a height h 0 .
- the precursor punching die 16 ' was reground due to wear on the die cutting edge.
- 26 material with an erosion height of ⁇ h was removed on the precursor punching die 16 'in the direction of insertion 26.
- an increase in the die cutting edge cross section or the die cutting edge diameter from d 0 to d was associated with the material removal.
- a corresponding increase in the diameter of the die cutting edge 24 will result if the punching die 16, starting from their dimensions in accordance with FIGS. 2a, 2b, 2c is reground again by the amount ⁇ h.
- FIGS. 3a, 4a show the punching template assemblies 27, 28 in section along the in the FIGS. 3b, 4b indicated cutting lines.
- each ten punching dies 27/1 ... 27/10 or 28/1 ... 28/10 are integrated. Each of them has a die opening 25 with a die cutting edge 24 of the FIGS. 2a, 2b, 2c
- the die opening 25 of each punching die 27/1 ... 27/10, 28/1 ... 28/10 forms a clearance angle ⁇ .
- the punching die assemblies 27, 28 are largely identical. The only constructive difference is an elevation of the punching die assembly 28 relative to the punching die assembly 27. Thus, the punching die assembly 28 provides a larger regrinding reserve.
- the course of the lifting axis 21, which simultaneously represents a rotation axis, is in the FIGS. 3a, 3b and 4a, 4b indicated.
- the die openings 25 of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 are arranged with their centers on a circular arc about the lifting or rotation axis 21.
- the punching die 16 are in accordance with FIGS. 2a, 2b, 2c and the punching dies 27/1 ... 27/10 and 28/1 ... 28/10 according to the Figs. 3a, 3b and 4a, 4b a specific punch ("punch stamp assignment") and / or a specific workpiece, in the present case a specific sheet thickness ("workpiece thickness assignment", here: “sheet thickness assignment”) assigned.
- the punch stamp assignment and / or the workpiece thickness assignment of a punching die is made as a function of the diameter of the punching to be produced and moreover as a function of the thickness of the sheet to be punched.
- the diameter of the cutout to be created gives the matching one Stamp diameter of the punch to be used before.
- the thickness of the sheet to be processed is decisive insofar as in the interest of a functionally reliable workpiece machining of the die cutting edge diameter must exceed the punch diameter of the punch to be combined with the punching die by a dependent on the sheet thickness to be processed measure.
- Fig. 5 the punching die arrangement 27 or the punching die arrangement 28 identical in this view with the punching die arrangement 27 is shown.
- the die openings 25 of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 are dimensioned with the respective die cutting edge diameter before and after a regrinding process.
- the die cutting edge diameter of the individual punching dies 27/1 ... 27/10, 28/1 ... 28/10 has accordingly increased by 0.2 mm in each case owing to the material removal associated with the regrinding.
- the stamping die assignment of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 remained unchanged regardless of the regrinding process, then only the sheet-metal thickness assignment of the punching dies 27/1 ... 27/10, 28/1 would be left. ..28 / 10 to change.
- the punching dies 27/1 ... 27/10, 28/1 ... 28/10 could be used instead of the sheet thicknesses 1 mm, 2 mm ... 10 mm before regrinding Following the post-processing sheet thicknesses of 3 mm, 4 mm ... 12 mm can be machined.
- the stamping punch assignment of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 is maintained despite the regrinding of the punching die arrangements 27, 28, then the stamping punch assignment of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 to change. If sheet metal thicknesses of 1 mm, 2 mm ... 10 mm are also to be processed following finishing, the punching dies are 27/1 ... 27/10, 28/1 ... 28/10 following the post-processing To assign a punch with a punch diameter of 4.2 mm.
- a punch stamp assignment and / or a sheet thickness assignment of the punching dies 16, 27/1 ... 27/10, 28/1 ... 28/10 is carried out as part of a computer-aided tool management.
- a data memory of a numeric tool management system 32 ( Fig. 1 ) are stored the essential data of the tools held by the operator of the punching machine 1 tool inventory.
- the individual tools assigned identification numbers (“ident numbers"), the dimensions of the respective tool when new and the regrinding length of the individual tools, ie the amount in millimeters, which has been removed on the respective tool, starting from the new state in particular due to wear.
- the database of the tool management system 32 is changeable. For example, additional tools can be created in the tool management or created tools can be removed from the inventory. In the case of reworking tools, the re-grinding length is entered for the relevant tool and stored in the data memory of the tool management system 32.
- the regrinding length for example, of punching dies is limited for design reasons. If the maximum regrinding length is reached, the relevant tool is no longer reworked, but then, if a post-processing would be necessary, taken from the inventory.
- a sheet metal 2 is to be machined on the punching machine 1, a numerical machining program to be processed by means of the CNC control 23 of the punching machine 1, namely an NC program 33 (FIG. Fig. 1 ) created.
- a tool requirement list is also generated in which all tools required for the execution of the NC program 33 are entered.
- To create the tool requirement list use is made of the tool data stored in the tool management system 32. If a circular punch-out with the diameter d is to be created on a sheet 2 with the thickness s, a round punch with the nominal diameter d is selected from the tool stock that is created in the tool management system 32.
- the punching die selected can be a stamping tool in the new state, but also a post-processed punching tool whose die opening has only been given the required nominal diameter due to the material removal carried out during the post-processing.
- the selected punching tools appear with their identification numbers in the tool requirement list of the NC program 33 to be imported into the CNC controller 23 and to be processed by means of the CNC controller 23.
- the operator of the punching machine 1 can assemble the punching tool set defined by means of the data of the tool management system 32 in order to set up the punching device 12.
- the operator accesses the punching tools of, for example, a tool cabinet housed in a tool inventory.
- a scraper 29 is fixed to the tool holder 11.
- the punch 15 and the punching die 16 is attached to the used as a tool magazine cross rail 9 of the punching machine 1.
- the other magazine locations are fitted to the cross rail 9 with tool holders 11 and punching tool sets arranged thereon.
- the distribution of the individual tool holder 11 with the respective punching tool sets on the magazine locations on the cross rail 9 is defined in the context of the setup process for the punching machine 1.
- the cross rail 9 moves numerically controlled to the punching station 12, where the punch 15 and the punching die 16 in the usual way to the upper tool holder 13th and transferred to the lower tool holder 14.
- the scraper 29 is installed at the punching station 12.
- the cross rail 9 moves with the now empty tool holder 11 in a position in which the sheet 2 to be processed by means of the cross rail 9 also provided clamping claws 10 can be detected.
- This results in the conditions according to Fig. 1 Immediately by the replacement in the upper tool holder 13 and in the lower tool holder 14 of the punch 15 and the punching die 16 are arranged in a workable state.
- Such a height adjustment may be necessary in particular if the punching die 16 is a post-processed punching die and the lower tool holding fixture 14 still has its predecessor punching die with regard to its height adjustment is tuned.
- the lower tool holder 14 is lifted by means of acting as a lifting device lower rotary / lifting drive unit 20 by the extent of the material removal carried out in the post-processing of the predecessor of the punching die 16.
- the sheet 2 to be processed is positioned in the usual way by means of the coordinate guide 7 and then processed by the punch 15 with one or more strokes.
- FIGS. 7a, 7b can also use a punching tool 17, as in the FIGS. 7a, 7b is shown, are used.
- This punching tool set 17 includes one of the punching dies 27/1 ... 27/10 of the punching die assembly 27 according to FIGS. 3a, 3b and an eccentric punch 30.
- FIGS. 7a, 7b on the punching die assembly 27 only five of the total of ten punching dies 27/1 ... 27/10 shown.
- the punching die assembly 27 and the eccentric punch 30 are attached to a tool holder 11 and fixed by means of the tool holder 11 on the cross rail 9 of the punching machine 1.
- the eccentric punch 30 is loaded into the upper tool holder 13 and the punching die assembly 27 into the lower tool holder 14 of the punching station 12.
- the height position of the punching die assembly 27 is adjusted if necessary by means of the lower rotary / lifting drive unit 20.
- Deviating from the conditions according to Fig. 6 is the punching tool set according to the FIGS. 7a, 7b after being replaced by a relative movement of the punching die assembly 27 on the one hand and the eccentric punch 30 on the other hand arranged in a workable state.
- the said relative movement is a relative rotational movement about the lifting axis 21.
- the relative rotational movement is carried out by means of the upper rotary / lifting drive unit 19. This can the eccentric punch 30 um move the lifting shaft 21 in rotational positions in which the eccentric punch 30 can cooperate for sheet metal processing with each of the punching dies 27/1 ... 27/10.
- the eccentric punch 30 is part of a punch assembly 31 which cooperates with the punching die assembly 27.
- the punching operation only one of the punches of the punch assembly 31 is activated and assigned to the workpiece machining one of the punching dies 27/1 ... 27/10.
- the punching tool set 17 used for workpiece machining is arranged in a workable state by relative rotation of the upper tool (punch 30 of the punch assembly 31) and lower tool (one of the punching dies 27/1 ... 27/10 of the punching die assembly 27).
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- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Die Erfindung betrifft ein Bearbeitungsprogramm zum Betreiben von Stanzmaschinen zum stanzenden Bearbeiten von Werkstücken, insbesondere von Blechen,
- ● wobei die Stanzmaschine einen Stanzwerkzeugsatz für die stanzende Werkstückbearbeitung aufweist, der eine Stanzmatrize zum stanzenden Bearbeiten von Werkstücken, insbesondere von Blechen sowie einen bei der Werkstückbearbeitung in einer Eintauchrichtung in die Stanzmatrize eintauchenden Stanzstempel umfasst,
- ● wobei die Stanzmatrize eine von einer Matrizenschneidkante begrenzte Matrizenöffnung aufweist, die sich in der Eintauchrichtung des Stanzstempels erstreckt und deren Querschnitt sich in Eintauchrichtung des Stanzstempels ändert und
- ● wobei die Stanzmatrize unter Abtragen von Material in Eintauchrichtung des Stanzstempels und damit verbunden unter Verlagerung der Matrizen-Schneidkante in Eintauchrichtung sowie unter Änderung des Querschnittes der Matrizenöffnung auf Höhe der Matrizeschneidkante ("Matrizen-Schneidkantenquerschnitt") nachbearbeitet ist.
- Wherein the punching machine has a punching tool set for the punching workpiece machining, which comprises a punching die for punching machining of workpieces, in particular sheets, as well as a punch that dives into the punching die during workpiece machining in a dipping direction,
- Wherein the punching die has a die opening which is delimited by a die cutting edge and which extends in the direction of insertion of the punching punch and whose cross section changes in the direction of insertion of the punching punch and
- ● where the punching die is under removal of material in the direction of insertion of the punch and thus associated with displacement of the die cutting edge in the direction of insertion and under change the cross section of the die opening at the level of Matrizeschneidkante ("Matrizen cutting edge cross section") is reworked.
Die Erfindung betrifft des Weiteren ein Computerprogrammprodukt, welches Kodierungsmittel umfasst, die zum Durchführen des vorstehenden Bearbeitungsprogramms angepasst sind sowie ein Verfahren zum stanzenden Bearbeiten von Werkstücken, insbesondere von Blechen.The invention further relates to a computer program product comprising coding means which are adapted to carry out the above machining program and a method for punching machining of workpieces, in particular sheets.
In der Praxis eingesetzt werden in der Regel Stanzmatrizen mit einer Matrizenöffnung, deren Wand unter einem sogenannten "Freiwinkel" gegenüber der Wand des in die Matrizenöffnung eintauchenden Stanzstempels verläuft. Der Freiwinkel soll dafür sorgen, dass das ausgestanzte Material die Stanzmatrize funktionssicher verlassen und dass der Stanzstempel nach dem Durchdringen des zu bearbeitenden Werkstückes und dem damit verbundenen Eintauchen in die Matrizenöffnung der Stanzmatrize ohne Behinderung in seine Ausgangslage zurückkehren kann. Im Interesse einer möglichst hohen Prozesssicherheit beim Stanzen wäre der Freiwinkel an Stanzmatrizen möglichst groß auszuführen.In practice, stamping dies are generally used with a die opening, the wall of which runs under a so-called "clearance angle" with respect to the wall of the stamping punch dipping into the die opening. The clearance angle is intended to ensure that the punched out material reliably leave the punching die and that the punch can return to its original position without hindrance after penetrating the workpiece to be machined and the associated immersion in the die opening of the punching die. In the interests of the highest possible process reliability during punching, the clearance angle on punching dies would be as large as possible.
Ein Nachschleifen von Stanzmatrizen wird insbesondere auf Grund von Verschleißerscheinungen an der Matrizenschneidkante durchgeführt und ist an der Stanzmatrize mit einem Materialabtrag in Eintauchrichtung des Stanzstempels verbunden. Mit dem Materialabtrag geht aufgrund des Freiwinkels eine Vergrößerung des Querschnittes der Matrizenöffnung auf Höhe der Matrizenschneidkante ("Matrizen-Schneidkantenquerschnitt") einher. Gleichzeitig ist der Matrizen-Schneidkantenquerschnitt maßgebend für die Zuordnung der Stanzmatrize zu einem damit zusammenwirkenden Stanzstempel ("Stanzstempelzuordnung") beziehungsweise für die Dicke des mittels der Stanzmatrize und des dieser zugeordneten Stanzstempels bearbeitbaren Werkstückes ("Werkstückdickenzuordnung"). Etwa im Falle eines Stanzwerkzeugsatzes, der einen Stanzstempel mit Kreisquerschnitt und eine Stanzmatrize mit im Querschnitt kreisförmiger Matrizenöffnung umfasst, verbleibt idealerweise zwischen der Matrizenschneidkante der Stanzmatrize und dem Stanzstempel ein Schneidspalt mit einer von der zu bearbeitenden Materialdicke abhängigen Spaltweite. Soll beispielsweise in ein 2 mm dickes Blech eine kreisförmige Ausstanzung mit einem Durchmesser von 5 mm eingebracht werden, so wird zu diesem Zweck ein Stanzwerkzeugsatz vorgesehen, der einen runden Stanzstempel mit einem Durchmesser von 5 mm und eine Stanzmatrize mit einer kreisförmigen Matrizenöffnung umfasst, deren Matrizenschneidkante einen Durchmesser von 5,2 mm besitzt.Regrinding of punching dies is carried out in particular due to signs of wear on the die cutting edge and is connected to the punching die with a material removal in the dipping direction of the punch. With the material removal goes due to the Angular clearance associated with an enlargement of the cross section of the die opening at the level of Matrizenschneidkante ("die cutting edge cross section"). At the same time, the die cutting edge cross section is decisive for the assignment of the punching die to a cooperating punch ("stamping punch assignment") or for the thickness of the workpiece which can be machined by means of the punching die and the punch punch associated therewith ("workpiece thickness assignment"). For example, in the case of a punching tool set comprising a punch with a circular cross section and a punching die with a circular die opening in the cross section, a cutting gap with a gap width depending on the material thickness to be processed ideally remains between the die cutting edge of the punching die and the punch. For example, if a circular punched hole with a diameter of 5 mm is to be inserted into a 2 mm thick sheet metal, a punching tool set is provided for this purpose which comprises a round punch with a diameter of 5 mm and a punching die with a circular die opening whose die cutting edge has a diameter of 5.2 mm.
Von den Stanzwerkzeugnutzern werden für einzelne Bearbeitungsaufgaben, beispielsweise für eine bestimmte Blechdicke sowie einen bestimmten Stanzdurchmesser, Stanzwerkzeugsätze vorgehalten, die speziell für die jeweilige Bearbeitungsaufgabe ausgelegt sind. Ein Nachschleifen der Stanzmatrize eines derartigen Stanzwerkzeugsatzes beispielsweise aufgrund von Verschleiß an der Matrizenschneidkante ist nur in einem Umfang vorgesehen, in welchem die mit dem Nachschleifen der Schneidmatrize verbundene Vergrößerung des Matrizen-Schneidkantenquerschnittes nicht dazu führt, dass sich zwischen der Matrizenschneidkante und dem zugeordneten Stanzstempel ein zu weiter Schneidspalt ergibt.The punching tool users are kept for individual processing tasks, such as a specific sheet thickness and a specific punch diameter, punching tool sets that are designed specifically for the respective machining task. Regrinding of the punching die of such a punching tool set, for example due to wear on the die cutting edge, is only provided to an extent in which the enlargement of the die cutting edge cross section associated with the regrinding of the cutting die does not lead to an engagement between the die cutting edge and the associated punch further cutting gap results.
Aufgrund des Freiwinkels der Stanzmatrize erweitert sich der Matrizen-Schneidkantenquerschnitt aber bereits aufgrund eines geringfügigen Nachschleifens der Stanzmatrize auf einen Wert, der bei gegebenem Stanzstempel im Interesse hochwertiger Bearbeitungsergebnisse nicht überschritten werden darf. Im Falle eines zu weiten Schneidspaltes wären mittels des Stanzwerkzeugsatzes nur noch Bearbeitungsergebnisse minderer Qualität realisierbar. Hat die Größe des Matrizen-Schneidkantenquerschnittes ihren Grenzwert erreicht, so wird üblicherweise von einem weiteren Nachschleifen abgesehen und stattdessen die Stanzmatrize aus dem Bestand genommen und verschrottet.Due to the clearance angle of the punching die, however, the die cutting edge cross-section already expands due to a slight regrinding of the punching die to a value which, given the punching punch, must not be exceeded in the interest of high-quality machining results. In the case of an excessively wide cutting gap, only lower quality machining results would be possible by means of the punching tool set. If the size of the Matrizen cutting edge cross section has reached its limit, it is usually apart from further regrinding and instead removed the punching die from the inventory and scrapped.
Die Nutzungsdauer von Stanzmatrizen zu verlängern, ist Aufgabe der vorliegenden Erfindung.To extend the useful life of punching dies is the object of the present invention.
Erfindungsgemäß gelöst wird diese Aufgabe durch die Gegenstände der unabhängigen Patentansprüche 1, 2, 4, 11 und 12.This object is achieved according to the invention by the subject matters of
Anspruchsgemäß wird beim Zusammenstellen eines Stanzwerkzeugsatzes aus einem Stanzstempel und aus einer durch Nachbearbeitung einer Vorgänger-Stanzmatrize erzeugten Stanzmatrize die mit der Nachbearbeitung verbundene Änderung des Matrizen-Schneidkantenquerschnittes berücksichtigt. Ausgehend von dem Matrizen-Schneidkantenquerschnitt der Vorgänger-Stanzmatrize ergibt sich anhand der mit der Nachbearbeitung verbundenen Änderung des Matrizen-Schneidkantenquerschnittes der Matrizen-Schneidkantenquerschnitt der (durch Nachbearbeitung entstandenen) Stanzmatrize. Dieser "aktuelle" Matrizen-Schneidkantenquer-schnitt bildet die Grundlage für die Stanzstempelzuordnung und/oder die Werkstückdickenzuordnung der Stanzmatrize. Es ist denkbar, dass die Stanzmatrize aufgrund der Nachbearbeitung und des damit verbundenen Materialabtrages einem anderen Stanzstempel zugeordnet wird als die Vorgänger-Stanzmatrize. Zusätzlich oder alternativ kann die Stanzmatrize einer anderen Werkstückdicke als die Vorgänger-Stanzmatrize zuzuordnen sein. In jedem Fall ist gewährleistet, dass auch die nachbearbeitete, insbesondere die nachgeschliffene Stanzmatrize zur Zusammenstellung von Stanzwerkzeugsätzen herangezogen wird. Aus der erfindungsgemäßen Aufhebung einer starren Bindung von Stanzmatrizen an bestimmte Stanzstempel und/oder an bestimmte Werkstückdicken resultiert eine Maximierung der Nutzungsdauer der Stanzmatrizen.According to the claims, the change of the die cutting edge cross-section associated with the post-processing is taken into account when assembling a punching tool set from a punch and from a punching die produced by post-processing of a precursor punching die. Starting from the die cutting edge cross section of the predecessor punching die, the die cutting edge cross section of the punching die (created by post processing) results from the change in the die cutting edge cross section associated with the postprocessing. This "current" die cutting edge cross-section forms the basis for the punch stamp assignment and / or the workpiece thickness assignment of the punching die. It is conceivable that the punching die is assigned to a different punch than the predecessor punching die due to the post-processing and the associated material removal. Additionally or alternatively, the punching die another Workpiece thickness to be assigned as the predecessor punching die. In any case, it is ensured that the post-processed, in particular the reground punching die is also used to assemble punching tool sets. The cancellation according to the invention of a rigid bonding of punching dies to certain punches and / or to certain workpiece thicknesses results in a maximization of the service life of the punching dies.
Die in der beschriebenen Weise definierten Stanzwerkzeugsätze sind an der Stanzvorrichtung einer Stanzmaschine derart anzuordnen, dass sie die gewünschte Werkstückbearbeitung durchführen können.The punching tool sets defined in the described manner are to be arranged on the punching device of a punching machine such that they can perform the desired workpiece machining.
Aufgrund des Materialabtrages nimmt die in Eintauchrichtung des Stanzstempels gemessene Höhe der Stanzmatrize ab und die Matrizenschneidkante verlagert sich entsprechend. Die Höhenlage der Matrizen-Schneidkante an der dem Stanzstempel zugewandten Oberseite der Stanzmatrize ist für die Werkstückbearbeitung in mehrerlei Hinsicht bedeutsam. Beispielsweise wird die Höhenlage der Matrizenschneidkante benötigt, um den Betrag des von dem Stanzstempel auszuführenden Stanzhubes bemessen zu können. Auch muss sichergestellt sein, dass die Oberseite der Stanzmatrize etwa bei Nachsetzbewegungen, welche das Werkstück zwischen einzelnen Stanzhüben relativ zu der Stanzvorrichtung ausführt, nicht über eine Werkstückauflage vorragt, auf welcher das Werkstück in der Umgebung der Stanzvorrichtung gelagert ist. Die genannten Aspekte werden beim Einrichten der Stanzvorrichtung einer Stanzmaschine berücksichtigt, indem die Stanzmatrize an der Stanzvorrichtung der Stanzmaschine in Eintauchrichtung des zugeordneten Stanzstempels je nach Höhe des bei der Nachbearbeitung erfolgten Materialabtrages positioniert wird.Due to the material removal, the height of the punch die measured in the direction of insertion of the punch decreases and the die cutting edge shifts accordingly. The height position of the die cutting edge on the top of the punch die facing the punch is important for workpiece machining in several respects. For example, the height of the die cutting edge is required in order to be able to measure the amount of the punching stroke to be executed by the punch. It must also be ensured that the top side of the punching die does not protrude above a workpiece support on which the workpiece is mounted in the surroundings of the punching device, for example during subsequent movements which the workpiece performs between individual punching strokes relative to the punching device. The above aspects are taken into account when setting up the punching device of a punching machine by the punching die is positioned on the punching device of the punching machine in the dipping direction of the associated punch depending on the amount of material removal during the post-processing.
Gemäß Patentanspruch 1 wird mittels einer entsprechenden Hubeinrichtung der Stanzmaschine die Höheneinstellung der Stanzmatrize an der Stanzvorrichtung der Stanzmaschine in Abhängigkeit von der Höhe des Materialabtrages bei der Nachbearbeitung der Stanzmatrize vorgenommen.According to
Ausweislich Patentanspruch 2 ist der einer Stanzmatrize zugeordnete Stanzstempel Teil einer Stanzstempelanordnung, die mehrere Stanzstempel umfasst. Die durch das Bearbeitungsprogramm gesteuerte Stelleinrichtung dient dazu, die Stanzstempelanordnung und die Stanzmatrize relativ zueinander derart zu positionieren, dass die Stanzmatrize und der Stanzstempel des definierten Stanzwerkzeugsatzes im Zusammenwirken die betreffende Werkstückbearbeitung durchführen können.According to claim 2 of a punching die associated punch is part of a punch assembly comprising a plurality of punches. The controlled by the machining program setting device serves to position the punch assembly and the punching die relative to each other such that the punching die and the punch of the defined punching tool set in cooperation can perform the relevant workpiece machining.
Gemäß Patentanspruch 4 ist die Stanzmatrize Bestandteil einer Stanzmatrizenanordnung, die mehrere Stanzmatrizen umfasst. Die Stanzmatrizenanordnung einerseits und der Stanzstempel des definierten Stanzwerkzeugsatzes andererseits werden derart positioniert, dass die Stanzmatrize des definierten Stanzwerkzeugsatzes und der zugeordnete Stanzstempel funktionsfähig sind.According to
Ausweislich Patentanspruch 11 wird das erfindungsgemäße Bearbeitungsprogramm numerisch gesteuert durchgeführt. Gegenstand von Patentanspruch 11 ist ein zu diesem Zweck vorgesehenes Computerprogrammprodukt. Läuft das erfindungsgemäße Bearbeitungsprogramm auf einer numerischen Steuerung der Stanzmaschine ab, so werden die anspruchsgemäße Hubeinrichtung und die anspruchsgemäßen Stelleinrichtungen im Sinne der Erfindung gesteuert.As shown in
Gemäß Patentanspruch 12 ist das erfindungsgemäße Bearbeitungsprogramm in ein Verfahren zum stanzenden Bearbeiten von Werkstücken, insbesondere von Blechen, integriert.According to
Besondere Ausführungsarten der in den unabhängigen Patentansprüchen beschriebenen Erfindung ergeben sich aus den abhängigen Patentansprüchen 3 und 5 bis 10.Particular embodiments of the invention described in the independent claims will become apparent from the
Die mit der Bearbeitung der Vorgänger-Stanzmatrize verbundene Änderung des Matrizen-Schneidkantenquerschnittes kann unterschiedlicher Natur sein.The change in the die cutting edge cross section associated with machining the precursor die may be of a different nature.
Gemäß Patentanspruch 7 resultiert aus der Nachbearbeitung der Vorgänger-Stanzmatrize eine Veränderung der Größe des Matrizen-Schneidkantenquerschnittes. Dementsprechend wird die Stanzstempelzuordnung und/oder die Werkstückdickenzuordnung der nachbearbeiteten Stanzmatrize in Abhängigkeit von der mit der Nachbearbeitung verbundenen Änderung der Größe des Matrizen-Schneidkantenquerschnittes vorgenommen.According to claim 7 results from the post-processing of the predecessor die a change in the size of the die cutting edge cross-section. Accordingly, the punch stamp assignment and / or the workpiece thickness assignment of the post-processed punching die is made in response to the change in the size of the die cutting edge cross-section associated with the post-processing.
Grund für eine durch die Nachbearbeitung bedingte Änderung der Größe des Matrizen-Schneidkantenquerschnittes kann ein Freiwinkel sein, unter welchem an der Vorgänger-Stanzmatrize die Wand der Matrizenöffnung gegenüber der Wand des in die Matrizenöffnung eintauchenden Stanzstempels verläuft. In diesem Fall erfolgt die Stanzstempelzuordnung und/oder die Werkstückdickenzuordnung der Stanzmatrize erfindungsgemäß in Abhängigkeit von dem Betrag des Freiwinkels (Patentanspruch 8). Mit Hilfe einfacher trigonometrischer Funktionen lässt sich aus dem Freiwinkel und aus der Höhe des bei der Nachbearbeitung in Eintauchrichtung des Stanzstempels erzielten Materialabtrags die mit der Nachbearbeitung verbundene Maßänderung des Matrizen-Schneidkantenquerschnittes bestimmen. Anhand der Maßänderung kann ausgehend von der ursprünglichen Größe des Matrizen-Schneidkantenquerschnittes die sich als Ergebnis der Nachbearbeitung einstellende Größe des Matrizen-Schneidkantenquerschnittes ermittelt werden.The reason for a change in the size of the die cutting edge cross-section caused by the post-processing can be a clearance angle under which the wall of the die opening runs on the predecessor punch die with respect to the wall of the punch piercing the die opening. In this case, the punch stamp assignment and / or the workpiece thickness assignment of the punching die according to the invention in dependence on the amount of the clearance angle (claim 8). With the help of simple trigonometric functions can be determined from the clearance angle and from the height of the material removal achieved in the reworking in the dipping direction of the punch, the dimensional change of the die cutting edge cross-section associated with the post-processing. Based on the dimensional change, starting from the original Size of the die cutting edge cross section are determined as a result of the post-processing adjusting size of the die cutting edge cross-section.
Gemäß Patentanspruch 9 besteht die bearbeitungsbedingte Änderung des Matrizen-Schneidkantenquerschnittes in einer Formänderung. Dementsprechend wird die Stanzstempelzuordnung und/oder die Werkstückdickenzuordnung in Abhängigkeit von der mit der Nachbearbeitung verbundenen Änderung der Form des Matrizen-Schneidkantenquerschnittes vorgenommen.According to claim 9, the machining-related change of the die cutting edge cross section is in a change in shape. Accordingly, the punch stamp assignment and / or the workpiece thickness assignment is made in response to the change in the shape of the die cutting edge cross section associated with the finishing operation.
Nachstehend wird die Erfindung anhand beispielhafter schematischer Darstellungen näher erläutert. Es zeigen:
- Fig. 1:
- Eine Stanzmaschine in teilweise aufgebrochener Darstellung mit einem aus einem Stanzstempel und aus einer Stanzmatrize bestehenden Stanzwerkzeugsatz an einer Stanzstation,
- Fign. 2a, 2b, 2c:
- eine Stanzmatrize erster Bauart zur Verwendung an einer Stanzmaschine gemäß
Fig. 1 , - Fign. 3a, 3b:
- eine Stanzmatrizenanordnung erster Bauart zur Verwendung an einer Stanzmaschine gemäß
Fig. 1 , - Fign. 4a, 4b:
- eine Stanzmatrizenanordnung zweiter Bauart zur Verwendung an einer Stanzmaschine gemäß
Fig. 1 , - Fig. 5:
- die Stanzmatrizenanordnung gemäß den
Fign. 3a, 3b zur Erläuterung der Stanzstempelzuordnung und/oder der Blechdickenzuordnung von Stanzmatrizen der Stanzmatrizenanordnung, - Fig. 6:
- einen Stanzwerkzeugsatz bestehend aus einem Stanzstempel und aus einer Stanzmatrize gemäß den
Fign. 2a, 2b, 2c an einem Werkzeughalter, - Fign. 7a, 7b:
- einen Stanzwerkzeugsatz bestehend aus einem Stanzstempel und aus einer Stanzmatrize einer Stanzmatrizenanordnung gemäß den
Fign. 3a, 3b und - Fig. 8:
- einen Stanzwerkzeugsatz bestehend aus einem Stanzstempel einer Stanzstempelanordnung und aus einer Stanzmatrize einer Stanzmatrizenanordnung gemäß den
Fign. 3a, 3b .
- Fig. 1:
- A punching machine in a partially cut-away view with a punching tool set consisting of a punch and a punching die at a punching station,
- FIGS. 2a, 2b, 2c:
- a punching die of the first type for use on a punching machine according to
Fig. 1 . - FIGS. 3a, 3b:
- a punching die assembly of the first type for use on a punching machine according to
Fig. 1 . - FIGS. 4a, 4b:
- a punching die assembly of the second type for use on a punching machine according to
Fig. 1 . - Fig. 5:
- the punching die arrangement according to
FIGS. 3a, 3b to explain the punch stamp assignment and / or the sheet thickness assignment of punching dies of the punching die assembly, - Fig. 6:
- a punching tool set consisting of a punch and a punching die according to the
FIGS. 2a, 2b, 2c on a tool holder, - FIGS. 7a, 7b:
- a punching tool set consisting of a punch and a punching die of a punching die assembly according to
FIGS. 3a, 3b and - Fig. 8:
- a punching tool set consisting of a punch of a punch assembly and a punching die of a punching die assembly according to the
FIGS. 3a, 3b ,
Gemäß
An der Querschiene 9 sind Spannpratzen 10 herkömmlicher Bauart zur Halterung eines Bleches 2 vorgesehen. Außerdem dient die Querschiene 9 als Werkzeugmagazin. Zu diesem Zweck sind an der Querschiene 9 Werkzeughalter 11 lösbar angebracht. Im Detail ist ein Werkzeughalter 11 in
An den freien Enden des oberen Gestellschenkels 4 sowie des unteren Gestellschenkels 5 befindet sich eine als Stanzstation 12 ausgeführte Stanzvorrichtung. Bei der Stanzstation 12 handelt es sich um einen Monostanzkopf. Dementsprechend umfasst die Stanzstation 12 Werkzeuglagerungen in Form einer oberen Werkzeugaufnahme 13 an dem oberen Gestellschenkel 4 sowie in Form einer unteren Werkzeugaufnahme 14 an dem unteren Gestellschenkel 5.At the free ends of the
In dem gezeigten Beispielsfall sind in die obere Werkzeugaufnahme 13 ein Stanzstempel 15 und in die untere Werkzeugaufnahme 14 eine Stanzmatrize 16 eingewechselt. Gemeinsam bilden der Stanzstempel 15 und die Stanzmatrize 16 einen Stanzwerkzeugsatz 17. Die Stanzmatrize 16 ist im Einzelnen in den
Ein elektrischer Dreh-/Hubantrieb 18 der Stanzmaschine 1 umfasst eine obere elektrische Dreh-/Hubantriebseinheit 19 sowie eine untere elektrische Dreh-/Hubantriebseinheit 20. Mittels der oberen Dreh-/Hubantriebseinheit 19 wird das in die obere Werkzeugaufnahme 13 eingewechselte Stanzwerkzeug, im vorliegenden Fall der Stanzstempel 15, entlang einer in Richtung einer vertikalen z-Achse verlaufenden Hubachse 21 angehoben und abgesenkt und außerdem in einer durch einen Doppelpfeil veranschaulichten Drehrichtung 22 um die Hubachse 21 gedreht. Entsprechend lässt sich das in die untere Werkzeugaufnahme 14 eingewechselte Stanzwerkzeug, hier: die Stanzmatrize 16, mittels der unteren Dreh-/Hubantriebseinheit 20 längs der Hubachse 21 translatorisch bewegen und in Drehrichtung 22 um die Hubachse 21 drehen.An electric rotary / lifting drive 18 of the punching
Alle wesentlichen Funktionen der Stanzmaschine 1 sind numerisch gesteuert. Zu diesem Zweck vorgesehen ist eine in
Gemäß den
Ausgehend von dem Niveau der Matrizenschneidkante 24 erweitert sich die Matrizenöffnung 25 in Eintauchrichtung 26 unter Ausbildung eines stark überzeichnet dargestellten Freiwinkels α. Dementsprechend besitzt die Matrizenöffnung 25 kegelstumpfartige Form. Der Freiwinkel α soll sicherstellen, dass Stanzbutzen, die mittels der Matrizenschneidkante 24 aus einem bearbeiteten Blech 2 ausgestanzt werden, funktionssicher aus der Stanzmatrize 16 nach unten hin austreten.Starting from the level of the
In
Wie in
Der Durchmesserzuwachs lässt sich mit Hilfe einfacher trigonometrischer Funktionen bestimmen. Beispielsweise ergibt sich der Durchmesserzuwachs des Matrizen-Schneidkantendurchmessers zu
Eine entsprechende Vergrößerung des Durchmessers der Matrizenschneidkante 24 wird sich ergeben, wenn die Stanzmatrize 16 ausgehend von ihren Abmessungen gemäß den
In gleicher Weise wirkt sich ein Materialabtrag an Schneidplatten in Form von Stanzmatrizenanordnungen 27, 28 aus, wie sie in den
In die Stanzmatrizenanordnungen 27, 28 sind jeweils zehn Stanzmatrizen 27/1...27/10 beziehungsweise 28/1...28/10 integriert. Jede davon besitzt eine Matrizenöffnung 25 mit einer Matrizenschneidkante 24 der zu den
Der Verlauf der Hubachse 21, die gleichzeitig eine Drehachse darstellt, ist in den
In Abhängigkeit von der Größe d der Matrizen-Schneidkantenquerschnittes bzw. -durchmessers sind die Stanzmatrize 16 gemäß den
Maßgebend für die Stanzstempel- bzw. für die Blechdickenzuordnung der Stanzmatrize 16, 27/1...27/10, 28/1...28/10 ist die zu lösende Bearbeitungsaufgabe.Decisive for the punch or for the sheet thickness assignment of the punching die 16, 27/1 ... 27/10, 28/1 ... 28/10 is the processing task to be solved.
Sind beispielsweise an Blechen kreisrunde Ausstanzungen zu erstellen, so wird die Stanzstempelzuordnung und/oder die Werkstückdickenzuordnung einer Stanzmatrize in Abhängigkeit von dem Durchmesser der zu erstellenden Ausstanzung und darüber hinaus in Abhängigkeit von der Dicke des stanzend zu bearbeitenden Bleches vorgenommen. Der Durchmesser der zu erstellenden Ausstanzung gibt den damit übereinstimmenden Stempeldurchmesser des einzusetzenden Stanzstempels vor. Die Dicke des zu bearbeitenden Bleches ist insofern maßgebend, als im Interesse einer funktionssicheren Werkstückbearbeitung der Matrizen-Schneidkantendurchmesser den Stempeldurchmesser des mit der Stanzmatrize zu kombinierenden Stanzstempels um ein von der zu bearbeitenden Blechdicke abhängiges Maß übersteigen muss.For example, if circular cut-outs are to be produced on metal sheets, the punch stamp assignment and / or the workpiece thickness assignment of a punching die is made as a function of the diameter of the punching to be produced and moreover as a function of the thickness of the sheet to be punched. The diameter of the cutout to be created gives the matching one Stamp diameter of the punch to be used before. The thickness of the sheet to be processed is decisive insofar as in the interest of a functionally reliable workpiece machining of the die cutting edge diameter must exceed the punch diameter of the punch to be combined with the punching die by a dependent on the sheet thickness to be processed measure.
In Anbetracht dieser Zusammenhänge ist es ohne weiteres ersichtlich, dass eine Änderung des Matrizen-Schneidkantendurchmessers, wie sie sich aufgrund des Nachschleifens von Stanzmatrizen mit einem Freiwinkel ergibt, eine Änderung der Stanzstempelzuordnung und/oder der Blechdickenzuordnung der betreffenden Stanzmatrize bedingen kann.In view of these relationships, it is readily apparent that a change in the die cutting edge diameter, as resulting from the regrinding of punch dies with a clearance angle, may necessitate a change in the die assignment and / or the sheet thickness assignment of the punching die concerned.
In
Bliebe die Stanzstempelzuordnung der Stanzmatrizen 27/1...27/10, 28/1...28/10 ungeachtet des Nachschleifvorganges unverändert, so wäre ausschließlich die Blechdickenzuordnung der Stanzmatrizen 27/1...27/10, 28/1...28/10 zu ändern. Bei Einsatz eines runden Stanzstempels mit einem Nenndurchmesser von 4mm könnten mit den Stanzmatrizen 27/1... 27/10, 28/1...28/10 anstelle der Blechdicken 1 mm, 2 mm... 10 mm vor dem Nachschleifen im Anschluss an die Nachbearbeitung Blechdicken von 3 mm, 4 mm...12 mm bearbeitet werden.If the stamping die assignment of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 remained unchanged regardless of the regrinding process, then only the sheet-metal thickness assignment of the punching dies 27/1 ... 27/10, 28/1 would be left. ..28 / 10 to change. When using a round punch with a nominal diameter of 4 mm, the punching dies 27/1 ... 27/10, 28/1 ... 28/10 could be used instead of the
Wird die Blechdickenzuordnung der Stanzmatrizen 27/1...27/10, 28/1... 28/10 trotz des Nachschleifens der Stanzmatrizenanordnungen 27, 28 beibehalten, so ist die Stanzstempelzuordnung der Stanzmatrizen 27/1... 27/10, 28/1...28/10 zu ändern. Sollen auch im Anschluss an die Nachbearbeitung Blechdicken von 1 mm, 2 mm...10 mm bearbeitet werden, so sind die Stanzmatrizen 27/1...27/10, 28/1...28/10 im Anschluss an die Nachbearbeitung einem Stanzstempel mit einem Stempeldurchmesser von 4,2 mm zuzuordnen.If the sheet thickness assignment of the punching dies 27/1 ... 27/10, 28/1 ... 28/10 is maintained despite the regrinding of the punching die
Neben Änderungen ausschließlich der Werkstückdickenzuordnung oder ausschließlich der Stanzstempelzuordnung sind auch Änderungen sowohl der Werkstückdicken- als auch der Stanzstempelzuordnung denkbar. Eine Vielzahl von Zuordnungsänderungen ist möglich.In addition to changes only the workpiece thickness assignment or excluding the punch combination, changes in both the Werkstückdicken- and the punch combination are conceivable. A large number of assignment changes is possible.
Eine Stanzstempelzuordnung und/oder eine Blechdickenzuordnung der Stanzmatrizen 16, 27/1...27/10, 28/1...28/10 wird im Rahmen einer computergestützten Werkzeugverwaltung vorgenommen. In einem Datenspeicher eines numerischen Werkzeugverwaltungssystems 32 (
Der Datenbestand des Werkzeugverwaltungssystems 32 ist veränderbar. Beispielsweise können zusätzliche Werkzeuge in der Werkzeugverwaltung angelegt oder angelegte Werkzeuge aus dem Bestand herausgenommen werden. Im Falle einer Nachbearbeitung von Werkzeugen wird zu dem betreffenden Werkzeug die Nachschleiflänge eingegeben und in den Datenspeicher des Werkzeugverwaltungssystems 32 aufgenommen. Die Nachschleiflänge beispielsweise von Stanzmatrizen ist aus konstruktiven Gründen begrenzt. Ist die maximale Nachschleiflänge erreicht, wird das betreffende Werkzeug nicht mehr nachbearbeitet sondern dann, wenn an sich eine Nachbearbeitung erforderlich wäre, aus dem Bestand genommen. Im Falle von Stanzmatrizen mit Freiwinkel bestimmt ein Rechner des Werkzeugverwaltungssystems 32 anhand der eingegebenen Nachschleiflänge sowie anhand des in dem Werkzeugverwaltungssystem 32 hinterlegten Betrages des Freiwinkels den sich als Ergebnis der Nachbearbeitung ergebenden neuen Durchmesser der Matrizenöffnung.The database of the
Ist auf der Stanzmaschine 1 ein Blech 2 zu bearbeiten, so wird zunächst ein mittels der CNC-Steuerung 23 der Stanzmaschine 1 abzuarbeitendes numerisches Bearbeitungsprogramm, nämlich ein NC-Programm 33 (
In der Werkzeugbedarfsliste des in die CNC-Steuerung 23 einzuspielenden und mittels der CNC-Steuerung 23 abzuarbeitenden NC-Programms 33 erscheinen die ausgewählten Stanzwerkzeuge mit ihren Identifizierungsnummern. Anhand dieser Identifizierungsnummern kann der Bediener der Stanzmaschine 1 zum Einrichten der Stanzvorrichtung 12 den mittels der Daten des Werkzeugverwaltungssystems 32 definierten Stanzwerkzeugsatz zusammenstellen. Zu diesem Zweck greift der Bediener auf die Stanzwerkzeuge eines beispielsweise in einem Werkzeugschrank untergebrachten Werkzeugbestandes zu.The selected punching tools appear with their identification numbers in the tool requirement list of the
Auf die in
Nach dem Rüsten des Werkzeugmagazins an der Querschiene 9 der Stanzmaschine 1 wird der im Rahmen der durchzuführenden Blechbearbeitung zuerst benötigte und den Stanzstempel 15 sowie die Stanzmatrize 16 umfassende Stanzwerkzeugsatz 17 an der Stanzstation 12 der Stanzmaschine 1 eingewechselt. Zu diesem Zweck verfährt die Querschiene 9 numerisch gesteuert zu der Stanzstation 12, wo der Stanzstempel 15 und die Stanzmatrize 16 in üblicher Weise an die obere Werkzeugaufnahme 13 sowie an die untere Werkzeugaufnahme 14 übergeben werden. Auch der Abstreifer 29 wird an der Stanzstation 12 installiert.After setting up the tool magazine on the cross rail 9 of the punching
Anschließend verfährt die Querschiene 9 mit dem nun leeren Werkzeughalter 11 in eine Position, in welcher das zu bearbeitende Blech 2 mit Hilfe der an der Querschiene 9 gleichfalls vorgesehenen Spannpratzen 10 erfasst werden kann. Es ergeben sich damit die Verhältnisse gemäß
Nach Anordnung des Stanzstempels 15 und der Stanzmatrize 16 in einem bearbeitungsfähigen Zustand wird das zu bearbeitende Blech 2 in gewohnter Weise mittels der Koordinatenführung 7 positioniert und anschließend durch den Stanzstempel 15 mit einem oder mehreren Arbeitshüben bearbeitet.After arranging the
Anstelle des aus dem Stanzstempel 15 und der Stanzmatrize 16 bestehenden Stanzwerkzeugsatzes 17 gemäß
Auch bei der Definition der aus den Stanzmatrizen 27/1...27/10 und dem exzentrischen Stanzstempel 30 bestehenden Stanzwerkzeugsätze 17 wird auf die Werkzeugdaten des für die Stanzmaschine 1 zur Verfügung stehenden Werkzeugverwaltungssystems 32 zurückgegriffen. Eine Nachbearbeitung der Stanzmatrizenanordnung 27 wird bei der Stanzstempelzuordnung beziehungsweise bei der Blechdickenzuordnung der Stanzmatrizen 27/1...27/10 gegebenenfalls berücksichtigt.Also in the definition of the punching dies 17 consisting of the punching dies 27/1 ... 27/10 and the
In der vorstehend zu
Abweichend von den Verhältnissen gemäß
Gemäß
Claims (12)
dadurch gekennzeichnet, dass
das Bearbeitungsprogramm für eine Hubeinrichtung (20) zum Positionieren der Stanzmatrize (16, 27/1...27/10, 28/1...28/10) in Eintauchrichtung (26) des Stanzstempels (15, 30), welcher der Stanzmatrize (16, 27/1...27/10, 28/1...28/10) in Abhängigkeit von der mit der Nachbearbeitung der Stanzmatrize (16, 27/1...27/10, 28/1...28/10) verbundenen Änderung des Matrizen-Schneidkantenquerschnittes einerseits und dem Querschnitt des Stanzstempels (15, 30) und/oder der bei der Werkstückbearbeitung zu durchdringenden Werkstückdicke andererseits zugeordnet ist, Steuerbefehle umfasst, aufgrund derer die Hubeinrichtung (20) die Stanzmatrize (16, 27/1...27/10, 28/1...28/10) in Eintauchrichtung (26) des der Stanzmatrize (16, 27/1... 27/10, 28/1...28/10) zugeordneten Stanzstempels (15, 30) in Abhängigkeit von der Höhe des Materialabtrages an der Stanzmatrize (16, 27/1...27/10, 28/1... 28/10) positioniert.
characterized in that
the machining program for a lifting device (20) for positioning the punching die (16, 27/1 ... 27/10, 28/1 ... 28/10) in the dipping direction (26) of the punch (15, 30), which the Punching die (16, 27/1 ... 27/10, 28/1 ... 28/10) depending on the post-processing of the punching die (16, 27/1 ... 27/10, 28/1. ..28 / 10) change of the die cutting edge cross section on the one hand and the cross-section of the stamping punch (15, 30) and / or the workpiece thickness to be penetrated during workpiece machining, on the other hand comprises control commands, on the basis of which the lifting device (20) drives the punching die (16, 27/1 ... 27/10, 28/1 ... 28/10) in the dipping direction (26) of the punching die (16, 27/1 ... 27/10, 28/1 ... 28/10) associated with punch (15, 30) in dependence positioned by the height of the material removal on the punching die (16, 27/1 ... 27/10, 28/1 ... 28/10).
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
characterized,
in Abhängigkeit von einer mit dem Materialabtrag an der Stanzmatrize (27/1...27/10, 28/1... 28/10) oder der Nachbearbeitung der Stanzmatrize (27/1...27/10, 28/1...28/10) verbundenen Änderung der Größe des Matrizen-Schneidkantenquerschnittes positioniert.
depending on a with the material removal on the punching die (27/1 ... 27/10, 28/1 ... 28/10) or the post-processing of the punching die (27/1 ... 27/10, 28/1 ... 28/10) positioned change in the size of the die cutting edge cross-section.
Priority Applications (1)
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EP20120179637 EP2522443B1 (en) | 2008-10-18 | 2008-10-18 | Program for operating a punching tool for punching of workpieces |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120179637 EP2522443B1 (en) | 2008-10-18 | 2008-10-18 | Program for operating a punching tool for punching of workpieces |
EP20080018279 EP2177290B1 (en) | 2008-10-18 | 2008-10-18 | Method for defining a punching tool set for punching of work pieces, such a punching tool set and punching machine with such a punching tool set |
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EP20080018279 Division EP2177290B1 (en) | 2008-10-18 | 2008-10-18 | Method for defining a punching tool set for punching of work pieces, such a punching tool set and punching machine with such a punching tool set |
EP08018279.3 Division | 2008-10-18 |
Publications (3)
Publication Number | Publication Date |
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EP2522443A2 true EP2522443A2 (en) | 2012-11-14 |
EP2522443A3 EP2522443A3 (en) | 2012-12-05 |
EP2522443B1 EP2522443B1 (en) | 2014-07-30 |
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ID=40337824
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EP20120179637 Not-in-force EP2522443B1 (en) | 2008-10-18 | 2008-10-18 | Program for operating a punching tool for punching of workpieces |
EP20080018279 Not-in-force EP2177290B1 (en) | 2008-10-18 | 2008-10-18 | Method for defining a punching tool set for punching of work pieces, such a punching tool set and punching machine with such a punching tool set |
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EP20080018279 Not-in-force EP2177290B1 (en) | 2008-10-18 | 2008-10-18 | Method for defining a punching tool set for punching of work pieces, such a punching tool set and punching machine with such a punching tool set |
Country Status (3)
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US (2) | US8701532B2 (en) |
EP (2) | EP2522443B1 (en) |
JP (1) | JP5858595B2 (en) |
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Also Published As
Publication number | Publication date |
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JP5858595B2 (en) | 2016-02-10 |
US20140202298A1 (en) | 2014-07-24 |
JP2011025309A (en) | 2011-02-10 |
US9573182B2 (en) | 2017-02-21 |
US20100095824A1 (en) | 2010-04-22 |
EP2177290A1 (en) | 2010-04-21 |
EP2522443A3 (en) | 2012-12-05 |
EP2177290B1 (en) | 2013-08-07 |
EP2522443B1 (en) | 2014-07-30 |
US8701532B2 (en) | 2014-04-22 |
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