WO2013167232A1 - Procédé et dispositif pour diviser une pièce en plusieurs parties - Google Patents

Procédé et dispositif pour diviser une pièce en plusieurs parties Download PDF

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Publication number
WO2013167232A1
WO2013167232A1 PCT/EP2013/001146 EP2013001146W WO2013167232A1 WO 2013167232 A1 WO2013167232 A1 WO 2013167232A1 EP 2013001146 W EP2013001146 W EP 2013001146W WO 2013167232 A1 WO2013167232 A1 WO 2013167232A1
Authority
WO
WIPO (PCT)
Prior art keywords
workpiece
cutting
tool
notch
notching
Prior art date
Application number
PCT/EP2013/001146
Other languages
German (de)
English (en)
Inventor
Wolfram Volk
Peter DEMMEL
Original Assignee
Technische Universität München
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 Technische Universität München filed Critical Technische Universität München
Publication of WO2013167232A1 publication Critical patent/WO2013167232A1/fr

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
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/002—Precutting and tensioning or breaking

Definitions

  • the invention relates to a method for cutting a workpiece and to a device arranged for cutting a workpiece.
  • the invention is particularly concerned with the desire for a burr-free cutting of workpieces, so that necessary processing steps for burr removal can be avoided.
  • a cutting of a workpiece according to DIN 8588 is understood to mean a mechanical separation of a workpiece without the formation of shapeless material, that is to say, in particular, without chips.
  • the most commonly used in industry for cutting a workpiece is the so-called shear cutting, the workpiece is divided between two moving blades that move past each other while maintaining a defined cutting gap.
  • shear cutting is one of the most commonly used separation processes in sheet metal working.
  • shearing which is also referred to as normal cutting, the material is deformed by the two penetrating cutting until its formability is exhausted and the material is lost through breakage.
  • burrs on the workpiece are adjusted during manual further processing or during assembly
  • a burr on the workpiece can lead to a reduced positioning accuracy when positioning the workpiece or when mounting in an assembly.
  • burrs on the workpiece in subsequent manufacturing steps can also lead to damage or increased wear on the tools.
  • the object of the invention is therefore to provide an alternative method for cutting a workpiece, wherein the fracture or cut surface after the cutting is as free of burrs as possible.
  • Another object of the invention is to provide a device with which a workpiece can be cut as free of burrs as possible.
  • the first object is achieved by a method for cutting a workpiece, wherein a notch geometry ending in the workpiece is introduced into the workpiece to be cut along a parting line with plastic deformation at least on one side and the workpiece is sheared along the parting line.
  • the invention proceeds from the consideration of producing a predetermined breaking point in the workpiece by a targeted introduction of a material deformation, which results in a burr-free cutting or fracture surface in a subsequent cutting of the workpiece. It has been found that a suitable material deformation can be generated by introducing a notch geometry, wherein the material of the workpiece is plastically deformed. By introducing a notch geometry under plastic deformation of the material, the structure of a particularly ductile material in the compressed or stretched, which leads to a local work hardening in the material. In the area of the notch impression, the hardness of the material thus increases, in particular in the case of metallic materials.
  • a burr-free cut or fracture surface can be produced by dividing the material in the region of the microstructure change effected by the notch impression. This is achieved by cutting the workpiece in the region of the local pre-deformation. In this case, the cutting edge of a cutting tool penetrates into the area pre-deformed by the notch impression. It can not come to a burr formation, since in the last separation phase due to the introduced notch indentation of the material can not take place in the cutting tool.
  • the invention also offers an advantage in the division of high and very high-strength workpieces, as they must be increasingly processed due to the increased requirements in the field of lightweight construction.
  • the specified method is particularly suitable for cutting metallic sheet metal parts.
  • other materials for example a ductile polymer, can also be made free from burrs and chips by the stated method be parted. Due to the introduced notch geometry, the cutting force required for cutting during shear cutting is reduced even with hard and brittle materials.
  • the method is thus also suitable for cutting a fiber-reinforced plastic or ceramic.
  • notch geometry is not necessarily understood to mean only the shape of a notch in the actual sense, which is often described as a wedge shape.
  • a wedge or actual notch shape is generally advantageous for generating a predetermined breaking point in conjunction with resulting voltage peaks.
  • the workpiece When introducing the plastic deformation in the form of a notch geometry as well as in the following dicing process, the workpiece can basically be in a warm, semi-warm or cold state.
  • the workpiece for introducing the notch geometry is moved with a holding-down device against a notching tool and the workpiece for this purpose rectified sheared with a first cutting tool against a second cutting tool.
  • the required pressing tool can be further simplified.
  • the Zerteillui the workpiece is thereby significantly shortened, which increases the production throughput considerably.
  • the notch geometry is introduced by a bite or knife cutting.
  • the kerf geometry along the dividing line introduced by means of a wedge-shaped cutting edge in the workpiece.
  • this is not a dicing method in accordance with the DIN 8588 standard, since in the present case the notch geometry in the component ends and the workpiece is not divided by the introduction of the notch geometry. Rather, it is therefore an incomplete dicing process that results in separation of the workpiece only in combination with another dicing process.
  • the invention is not limited to the fact that the notch geometry is introduced on one side into the workpiece. Rather, the notch geometry along the dividing line can also be introduced into the workpiece on both sides. In this case, the two notch geometries are introduced in such a way that a material connection remains in the workpiece between the notch geometries. Also, the two-sided introduction of a notch geometry, the workpiece is not completely divided. Preferably, the two-sided notch geometry with wedge cutters in the manner of the so-called Teissmonys according to the standard DIN 8588 introduced. In the present case, this is an incomplete bite-cutting because the workpiece is not broken after the notch geometries have been introduced.
  • the process steps of introducing a kerf geometry ending in the component and shearing cutting can be carried out both in two separate working steps and combined in a common working step.
  • the introduction of the notch geometry in a joint step with the shear cutting is to be preferred. In this case, for example, penetrates a notching tool against a hold-down in the workpiece while a cutting tool is moved against the notching tool, the notching tool acts as a second cutting tool of the shear cutting.
  • the component to be divided is deformed by a forming process, in particular by deep drawing.
  • the dividing line for dividing the workpiece is provided in particular in an edge region of the workpiece, so that the edges are cut off or separated outside the shaping.
  • Particularly advantageous is the introduction of the notch geometry in one step with the Umformveralthoughi.
  • a shaping die or a punch forming the workpiece in the die at the same time be configured as a notching tool, so that in particular during deep drawing along the desired parting line, for example at the edge of the die, the corresponding notch geometry is introduced into the workpiece.
  • the workpiece is sheared in one step with the forming process.
  • the introduction of the notch geometry can take place before or during the forming process.
  • the notching tool is at the same time designed as a cutting tool for the shear cutting.
  • the deep-drawing and the cutting of the workpiece thus take place in a single combined operation. A separate machining process for separating edges of the formed by deep drawing workpiece can thus be completely eliminated.
  • the formed by deep drawing workpiece is generated directly burr-free and freed from its edges.
  • the depth of the impression of the notch geometry should be selected in the material of the workpiece to be divided depending on its ductility.
  • the notch geometry for example, should preferably be introduced at least to a depth of 10%, based on the thickness of the workpiece, at least to a depth of 10%.
  • the specified method is particularly suitable for cutting workpieces having a thickness between 0.3 mm and 3 mm.
  • the method is also suitable for cutting workpieces with thicknesses over 10 mm. In general, the method is not limited to a specific workpiece thickness.
  • the second object is achieved according to the invention by a device for dividing a workpiece, which comprises a first and a second cutting tool, which are movable relative to each other with the interposition of the workpiece, a blank holder and a movable against the workpiece notching tool.
  • the notching tool for introducing a kerf geometry ending in the workpiece along a parting line and the cutting tools for shearing the workpiece along the parting line are arranged.
  • the notching tool has, for example, a wedge or knife edge formed in accordance with the desired parting line, which can be introduced into the workpiece under plastic deformation of the material.
  • the wedge cutting edge or another active element for introducing the notch geometry can be made, for example, from a hardened steel.
  • the device is adapted to move the workpiece for introducing the notch geometry with the hold-down device against the notch tool and the same time scissors cut the workpiece with the first cutting tool against the second cutting tool.
  • the device can be made simpler and cheaper and the dicing process can be carried out more quickly.
  • the notching tool preferably comprises a first wedge cutting edge and a second wedge cutting edge, which are movable relative to one another and arranged to incomplete cutting teeth. This makes it possible to introduce a notch geometry on both sides along the dividing line into the workpiece.
  • the device comprises a die and a punch, and wherein the die and / or the punch is additionally designed as a notching tool / are.
  • the device is designed as a deep-drawing tool with a shaping die and a punch for molding the workpiece into the die.
  • the die and / or the punch are at the same time designed to introduce the notch geometry into the workpiece to be treated.
  • the notching tool penetrates the die or on the stamp at the same time in the workpiece, so that the desired notch geometry in the workpiece in one step with the deep drawing takes place.
  • the workpiece can be processed in one step with a forming process, such as thermoforming, is parted.
  • a forming process such as thermoforming
  • the die and / or the punch are designed both as a notching tool and as a cutting tool.
  • the workpiece can thus be cut both shaped and burr-free.
  • the notching tool is designed as a second cutting tool against which the first cutting tool is guided during shear cutting.
  • Vorteihafta the device comprises a control device for actuating the movable tools, which is arranged to perform the division of the workpiece according to the method described above.
  • FIG. 1 shows schematically the cutting of a workpiece by notching and shearing in a two-stage two-sided process
  • Fig. 2 schematically dividing a workpiece by notching and shear cutting in a two-stage unilateral process
  • FIG. 3 shows schematically the cutting of a workpiece by notching and shear cutting in a single-stage one-sided process.
  • Fig. 1 the cutting of a workpiece 2 by notching and shearing is shown schematically in a two-stage two-sided process.
  • the process is divided into a total of four phases, wherein the phases a) and b) are assigned to the method step of introducing a notch geometry and the phases c) and d) to the method step of shearing.
  • a sheet-like workpiece 2 is introduced between a first notch part 4 and a second notch part 5.
  • the two notching parts 4, 5 comprehensive notching tool 6 is this purpose in an open state.
  • the two notch parts 4, 5 each comprise a cutting edge 7 for introducing a notch geometry 12.
  • the work piece 2 is positioned in the notching tool 6 such that the desired parting line 10 at which the work piece 2 is to be cut is arranged between the cutters 7.
  • phase b) the notch part 4 is moved with the interposition of the workpiece 2 against the notch part 5. Under an embossing force, the cutting edges 7 penetrate into the material of the workpiece 2 on both sides, forming the respective notch geometry 12. In this case, the material of the workpiece 2 is locally plastically deformed. The blades 7 are dimensioned so that after completion of the phase b) between the resulting notch geometries 12 a material connection 13 remains. The workpiece 2 is not divided.
  • the notch introduction according to phases a) and b) corresponds to an incomplete Teissbreak.
  • the workpiece 2 is sheared along the introduced notch geometries 12.
  • the workpiece 2 is pressed in phase c) by means of a blank holder 14 against a die 16.
  • the die 16 may be formed, for example, for shaping the workpiece 2 by deep drawing.
  • the hold-down 14 may be formed in particular as a stamp 15. Or it is a separate, not marked stamp provided.
  • a first cutting tool 18 moves against the workpiece 2.
  • the workpiece 2 is positioned so that the dividing line 10 and the introduced Kerbgeometrien 12 between the die 16 and the first cutting tool 18 is arranged. Subsequently, the first cutting tool 18 is moved further against the workpiece 2.
  • the die 16 also acts as a second cutting tool 19. While maintaining a predetermined cutting gap, the workpiece 2 is sheared by counter-moving the two cutting tools 18, 19 along the parting line 10.
  • the local deformation of the material due to the introduced notch geometries 12 leads to crack formation in the material connection 13. Because of the introduced notch impression 12, the material can not flow to a cutting tool 18, 19 during shear cutting. The result is a burr-free cut or fracture surface, which is aligned approximately perpendicular to the workpiece surface.
  • FIG. 2 schematically shows the cutting of a workpiece 2 by notching and shearing in a two-stage one-sided method.
  • the sequence is identical to FIG. 1.
  • a notch part 4 is omitted.
  • This notch part 4 is replaced by the hold-down 14.
  • the holding-down device 14 moves against the notch part 5 of the notching tool 6.
  • the result is a notched geometry 12 introduced on one side into the workpiece 2, which ends in the workpiece 2 and has led to a local plastic deformation of the workpiece 2.
  • Fig. 3 the cutting of a workpiece 2 by notching and shear cutting is shown schematically in a one-stage unilateral process.
  • the introduction of the notch geometry and the shear cutting take place in one work step.
  • the notch part 5 of the notching train 6 at the same time acts as a die 16, for example, for a deep drawing and as a second cutting tool 19th
  • phase a the workpiece 2 is positioned between a holding-down device 14, a first cutting tool 18 and a notching part 5.
  • the hold-down 14 is moved with the interposition of the workpiece 2 against the die 16 and the second cutting tool 19.
  • the cutting edge 7 penetrates under plastic deformation along the parting line 10 on one side into the workpiece 2.
  • the first cutting tool 18 moves against the workpiece 2.
  • phase c the first cutting tool 18 is moved further against the workpiece 2 or against the die 16 acting as the second cutting tool 19.
  • the workpiece 2 is sheared along the parting line 10 at which the one-sided notch geometry 12 is introduced.
  • the wedge 7 of the die 16 is shaped so that in phase c) the first cutting tool 18 can be moved against the die 16 under shear cutting of the workpiece 2.
  • an edge 20 of the workpiece 2 is separated along a parting line 10 from the workpiece.
  • a control device 24 is provided according to FIG. 1.
  • the specified method can be configured so that only a single-acting press is required to cut the workpiece 2.
  • the active tools are, as indicated by the arrows drawn, moved to divide the workpiece 2 with force only in one direction.
  • the workpiece 2 for introducing the notch geometry 12 with the hold-down 14 against the notch part 4, 5 of a notching tool 6 is moved and the workpiece 2 with the first cutting tool 18 rectified sheared against the second cutting tool 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Punching Or Piercing (AREA)
  • Shearing Machines (AREA)

Abstract

L'invention concerne un procédé pour diviser une pièce (2) en plusieurs parties ainsi qu'un dispositif (22) approprié. Ce procédé consiste à réaliser dans la pièce à diviser (2), au moins d'un côté, une entaille (12) se terminant dans ladite pièce (2), le long d'une ligne de séparation (10) tout en exerçant une déformation plastique, et à cisailler la pièce (2) le long de la ligne de séparation (10). Il est ainsi possible d'obtenir directement une surface de coupe ou de rupture sans bavure.
PCT/EP2013/001146 2012-05-10 2013-04-18 Procédé et dispositif pour diviser une pièce en plusieurs parties WO2013167232A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102012009188.5 2012-05-10
DE102012009188 2012-05-10
DE102012011767.1 2012-06-15
DE102012011767A DE102012011767A1 (de) 2012-05-10 2012-06-15 Zerteilen eines Werkstücks

Publications (1)

Publication Number Publication Date
WO2013167232A1 true WO2013167232A1 (fr) 2013-11-14

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DE (1) DE102012011767A1 (fr)
WO (1) WO2013167232A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015106961A1 (fr) * 2014-01-15 2015-07-23 Wolfgang Rixen Procédé de production de passages dans un corps métallique par cisaillement à grande vitesse
GB2539381A (en) * 2015-05-22 2016-12-21 Burnsides (Marketing Aids) Ltd Manufacturing method
JP2017006971A (ja) * 2015-06-25 2017-01-12 日伸工業株式会社 プレス加工品の製造方法及びプレス加工品
DE102018106520B3 (de) 2018-03-20 2019-02-28 Benteler Automobiltechnik Gmbh Verfahren zur Bearbeitung eines Blechprofils
CN111842813A (zh) * 2020-07-29 2020-10-30 东莞市逸昊金属材料科技有限公司 一种锆基非晶合金铸锭的生产方法
IT201900006551A1 (it) * 2019-05-06 2020-11-06 Euromeccanica Mazzer S R L Metodo di taglio dell’alluminio e macchinario di taglio

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
JP6004117B2 (ja) * 2013-09-30 2016-10-05 日産自動車株式会社 金属箔の切断装置
DE102014208952A1 (de) * 2014-05-12 2015-11-12 Volkswagen Aktiengesellschaft Pressengebundenes Werkzeug zum gratfreien Scherschneiden von Blechwerkstücken und Verfahren zu dessen Betrieb
DE102014218336A1 (de) * 2014-09-12 2016-03-17 Bayerische Motoren Werke Aktiengesellschaft Trennverfahren und -vorrichtung
EP3088096B1 (fr) * 2015-04-29 2021-07-07 TRUMPF Werkzeugmaschinen GmbH + Co. KG Dispositifs et procédé de formage par pression de barrettes de liaison entre des parties d'une pièce à usiner en plaques
CN106424304A (zh) * 2016-11-04 2017-02-22 深圳市佰瑞兴实业有限公司 一种模切用复合刀模
DE102016013879A1 (de) * 2016-11-19 2018-04-12 Audi Ag Verfahren und Herstellung eines warmumgeformten und pressgehärteten Fahrzeugkarosseriebauteils

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SU816624A2 (ru) * 1979-01-28 1981-03-30 Timoshchenko Viktor A Способ вырезки деталей из листо-ВыХ зАгОТОВОК
US4362078A (en) * 1980-03-25 1982-12-07 Akzona Incorporated Method of blanking
DE3931320C1 (fr) 1989-09-20 1991-08-08 Feintool International Holding, Lyss, Ch
DE10239453A1 (de) * 2002-08-28 2004-03-11 Dynamit Nobel Kunststoff Gmbh Werkzeug zum Prägestanzen von Durchbrüchen in Kunststoffteilen, Verfahren zum Prägestanzen und Bauteil
WO2010117317A1 (fr) * 2009-04-06 2010-10-14 Gestamp Hardtech Ab Procédé de fabrication d'un produit mis en forme et utilisation du procédé
WO2010140960A1 (fr) * 2009-06-02 2010-12-09 Precomp Solutions Aktiebolag Procédé et dispositif de poinçonnage / de découpe d'un composant à partir d'un flan

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Patent Citations (7)

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Publication number Priority date Publication date Assignee Title
SU475193A1 (ru) * 1973-07-27 1975-06-30 Ленинградский Ордена Ленина Политехнический Институт Им.Калинина М.И. Способ вырезки деталей из листовых заготовок
SU816624A2 (ru) * 1979-01-28 1981-03-30 Timoshchenko Viktor A Способ вырезки деталей из листо-ВыХ зАгОТОВОК
US4362078A (en) * 1980-03-25 1982-12-07 Akzona Incorporated Method of blanking
DE3931320C1 (fr) 1989-09-20 1991-08-08 Feintool International Holding, Lyss, Ch
DE10239453A1 (de) * 2002-08-28 2004-03-11 Dynamit Nobel Kunststoff Gmbh Werkzeug zum Prägestanzen von Durchbrüchen in Kunststoffteilen, Verfahren zum Prägestanzen und Bauteil
WO2010117317A1 (fr) * 2009-04-06 2010-10-14 Gestamp Hardtech Ab Procédé de fabrication d'un produit mis en forme et utilisation du procédé
WO2010140960A1 (fr) * 2009-06-02 2010-12-09 Precomp Solutions Aktiebolag Procédé et dispositif de poinçonnage / de découpe d'un composant à partir d'un flan

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015106961A1 (fr) * 2014-01-15 2015-07-23 Wolfgang Rixen Procédé de production de passages dans un corps métallique par cisaillement à grande vitesse
GB2539381A (en) * 2015-05-22 2016-12-21 Burnsides (Marketing Aids) Ltd Manufacturing method
GB2539381B (en) * 2015-05-22 2017-09-20 Burnsides (Marketing Aids) Ltd Manufacturing method
JP2017006971A (ja) * 2015-06-25 2017-01-12 日伸工業株式会社 プレス加工品の製造方法及びプレス加工品
DE102018106520B3 (de) 2018-03-20 2019-02-28 Benteler Automobiltechnik Gmbh Verfahren zur Bearbeitung eines Blechprofils
IT201900006551A1 (it) * 2019-05-06 2020-11-06 Euromeccanica Mazzer S R L Metodo di taglio dell’alluminio e macchinario di taglio
CN111842813A (zh) * 2020-07-29 2020-10-30 东莞市逸昊金属材料科技有限公司 一种锆基非晶合金铸锭的生产方法

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