US20170173656A1 - Crimping Unit for a Crimping Tool - Google Patents

Crimping Unit for a Crimping Tool Download PDF

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Publication number
US20170173656A1
US20170173656A1 US15/451,491 US201715451491A US2017173656A1 US 20170173656 A1 US20170173656 A1 US 20170173656A1 US 201715451491 A US201715451491 A US 201715451491A US 2017173656 A1 US2017173656 A1 US 2017173656A1
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United States
Prior art keywords
crimping
movement
tool
unit
bed
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Abandoned
Application number
US15/451,491
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English (en)
Inventor
Siegfried Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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Filing date
Publication date
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Assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT reassignment BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAUER, SIEGFRIED
Publication of US20170173656A1 publication Critical patent/US20170173656A1/en
Abandoned legal-status Critical Current

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws

Definitions

  • the invention relates to a crimping unit for a crimping tool, to a crimping tool having a corresponding crimping unit, and to a method for retrofitting crimping tools with a corresponding crimping unit.
  • crimping methods in order to connect sheets made of the same or different materials together in a form-fitting manner by cold forming.
  • an outer sheet is connected inseparably to an inner structural sheet by crimping or hemming the sheet edges.
  • the sheets are first of all preformed three-dimensionally with the aid of a deep-drawing method and trimmed. Subsequently, for example, the outer sheet is given a flange angled through about 90°. During the actual crimping operation, this flange is laid down fully on an edge of the structural sheet in several passes by a roll hemming tool guided along the flange by a robot. Usually, at least one tool change is necessary between the individual passes.
  • pressing tools having crimping jaws which crimp the sheets and connect them together in several pressing strokes.
  • a flange of the sheet-metal parts to be connected is likewise first of all precrimped with a precrimping jaw before subsequently being finish-crimped with a finish-crimping jaw.
  • the two steps can take place in two different pressing tools or with two different geometries of the crimping jaws. In any case, it is necessary to change the tool used.
  • WO 01/24954 A1 describes a hemming device in which use is made of only one hemming jaw and first of all a flange of the outer sheet is precrimped by a horizontal linear movement. Subsequently, the entire lower tool of the hemming device is raised, together with the hemming bed holding the sheet-metal parts, by a lifting movement and pressed against the hemming jaws in order to finish-crimp the already precrimped flange.
  • Such pressing tools require complicated hydraulics in order to raise the large and heavy lower tool and press it against the hemming jaw.
  • the required hydraulic units are correspondingly complicated and the investment costs high.
  • Control effort also proves to be very complex, since the heavy lower tool has to be moved against the hemming jaw as precisely as possible in order to achieve sufficient quality of the crimping.
  • flexibility that is as great as possible for adaptation of the tool to new workpieces is intended to be achieved.
  • a crimping unit a crimping tool, a method for crimping and a method for retrofitting a crimping tool in accordance with embodiments of the invention.
  • a crimping unit for a crimping tool for crimping workpieces includes:
  • the stand element thus provides the fastening possibility for anchoring the entire crimping unit and to connect it for example to the crimping tool.
  • the carrier element is connected to the stand element in a linearly movable manner and can thus be displaced in the first direction of movement with respect thereto.
  • the slide element is likewise designed so as to be linearly movable and, to this end, is correspondingly connected to the carrier element in a displaceable manner.
  • a second slide rail system can be provided between the slide element and the carrier element, said second slide rail system providing guidance of the movement in the second direction of movement and in an opposite direction thereto.
  • the crimping unit itself thus represents a module which autonomously allows a single crimping element to move in two directions in which it is possible for it to travel independently of one another.
  • the modular and autonomous construction of the entire crimping unit furthermore makes it possible to configure it virtually independently of the crimping bed of the crimping tool. A complicated movement of the crimping bed is therefore not necessary.
  • the modular construction affords the possibility of equipping existing crimping tools, for example roll crimping tools or pressing tools, with the crimping unit and thus of retrofitting them therewith in a particularly simple manner.
  • the carrier element includes a corresponding geometry in order to arrange the first and second slide rail systems on the carrier element.
  • the carrier element has a substantially T-shaped or L-shaped geometry, wherein the slide rail systems are each fastened to one of the legs of the T-shaped or L-shaped geometry.
  • first and the second direction of movement are oriented substantially perpendicularly to one another.
  • angles of between 70° and 110°, preferably between 80° and 100°, particularly preferably about 90°, are deemed to be substantially perpendicular.
  • the crimping unit connected to the slide element forms a tool which is brought into contact with the workpiece to be formed in order to deform the latter by crimping an edge region.
  • Workpieces should be understood as being, in particular, sheet-metal workpieces made of aluminum sheet, steel sheet or sheets made of some other metal materials and combinations of different sheets.
  • the rigid connection of the crimping element to the slide element can take place in a force-fitting, form-fitting and/or materially integral manner, such that the crimping element can be moved together with the slide element.
  • the crimping element is connected to the slide element in a rigid but detachable manner, for example by a screw connection, such that, if required, the crimping element can be replaced or exchanged for a crimping element having an identical or different geometry.
  • the crimping element can likewise be embodied in one piece with the slide element.
  • the crimping element can include:
  • the crimping element has one or two crimping portions in order to precrimp and/or finish-crimp the workpiece.
  • the respective portions can have a geometry that is as suitable as possible.
  • the first crimping portion that is able to be provided for precrimping can be configured in an inclined manner with respect to the first direction of movement.
  • the crimping element thus has a surface which is set at an angle with respect to the first direction of movement of the carrier element.
  • the first crimping portion can have a curved surface.
  • the curvature is embodied in a concave manner and thus defines a fillet.
  • the sheet, or the flange of the sheet is deformed in an analogous manner as soon as the crimping portion is displaced against the flange and impinges thereon.
  • a radius of curvature of the first crimping portion can accordingly be adapted to the flange to be formed.
  • the sheet to be crimped is arranged such that a flange to be crimped is oriented substantially in the direction of the first direction of movement.
  • the first crimping portion is angled in the same way with respect to the flange and can form the latter in a corresponding manner as soon as it is pressed against the flange.
  • the second crimping portion is configured in particular for finish-crimping. This means that its geometry impinges on the already precrimped flange when it is moved in the first direction of movement, such that the flange is formed fully. Therefore, the second crimping portion can be embodied substantially parallel to a subsequent orientation of the flange in the finish-crimped state.
  • the crimping element is suitable in particular for the production of what are referred to as “single crimps”, which can be embodied as “normal crimps”, “stepped crimps” or “hollow crimps”.
  • the crimping element, and the first and/or second crimping portion thereof, can be geometrically shaped in a manner corresponding to the crimp to be produced.
  • the surface of the second crimping portion can have a flat surface for producing a normal crimp or a corresponding step for stepped crimping of the flange.
  • the carrier element is movable in the first direction of movement at least between a first starting position and a first end position.
  • first starting position a position in which the crimping element is spaced apart from the crimping bed, receiving the workpiece, of the crimping tool such that the workpiece can be inserted into the crimping bed.
  • the slide element is movable in the second direction of movement at least between a second starting position, a precrimping position and/or a finish-crimping position.
  • the possibly provided second slide rail system allows linear displacement in the second direction of movement between at least two of the three abovementioned positions.
  • any desired number of intermediate positions are likewise possible. It goes without saying, here too, that the abovementioned positions and intermediate positions can be reached in any desired order and direction.
  • the starting position should be understood as being a position in which the crimping element is spaced apart from a crimping bed, receiving the workpiece, of the crimping tool such that the workpiece can be inserted into the crimping bed.
  • the carrier element and/or the slide element are each configured to be movable linearly by means of at least one pneumatically and/or hydraulically actuable drive, in particular a lifting cylinder, and/or an electromechanical drive.
  • the drives allow, in particular, a sufficiently large drive force in order to provide the requisite force for crimping the workpieces.
  • these drives are especially suitable since they can maintain a respectively set position, even when the respective element is moved in the respectively other direction of movement. This is important in particular for the slide element, which is moved into the precrimping position or the finish-crimping position and is subsequently moved against the workpiece in the first direction of movement in order to crimp the flange.
  • additional locking measures can be provided, in order to prevent unintentional displacement of the carrier element and/or of the slide element in that the particular element is able to be locked in at least one of said positions or intermediate positions.
  • the described drives in particular the hydraulic drives, can be fastened directly to one or more elements of the crimping unit, for example to the slide element, the carrier element and/or the stand element.
  • the carrier element is configured to be movable by a hydraulic drive and the slide element is configured to be movable by a pneumatic drive.
  • the other described embodiments and combinations are also possible, however.
  • a crimping tool for crimping a workpiece includes:
  • the crimping tool can include at least one holding-down device for fixing the workpiece to the crimping bed. In this way, undesired displacement and detachment of the workpiece with respect to the crimping bed, in particular during precrimping and finish-crimping, can be prevented.
  • the stand element can be arranged in a fixed position with regard to the crimping bed.
  • the stand element can be fastened directly to the crimping bed.
  • the crimping unit can be arranged directly at the peripheral surface of the crimping bed.
  • the crimping unit can be arranged such that the first direction of movement is oriented for a lifting movement or lowering movement of the carrier element relative to the crimping bed, and the second direction of movement is oriented for a linear movement of the crimping element in the direction of the crimping bed.
  • the first and second directions of movement always include the possibility of a movement in the respectively opposite direction.
  • the crimping tool can include a plurality of crimping units, wherein the crimping units are arranged adjacently to one another. This means that more than one crimping unit can be arranged next to one another in order to increase the width of the workpiece portion to be crimped.
  • the crimping units can be configured identically.
  • the plurality of crimping units can partially or fully enclose the crimping bed and thus allow the workpiece to be processed at several points in succession or at the same time. The workpiece merely has to be inserted into the crimping tool once, and so, in this way, the cycle time can be considerably reduced again with respect to the known tools.
  • the method includes the acts of:
  • the step of precrimping can first of all include a linear movement of the slide element in the second direction of movement for arranging the crimping element, in particular the first crimping portion, over the flange to be precrimped.
  • the step of finish-crimping, following the precrimping can first of all include a return movement of the carrier element counter to the movement of the carrier element in the first direction of movement for precrimping and/or a linear movement of the slide element in the second direction of movement from the precrimping position into a finish-crimping position for positioning the crimping element, in particular the second crimping portion, over the precrimped flange.
  • the carrier element is first of all moved in the first direction of movement for precrimping. After precrimping, the carrier element is moved in the opposite direction to this previous movement. This occurs, however, before it is moved in the first direction of movement again, i.e. counter to the opposite direction, in a subsequent step for finish-crimping.
  • the method before the step of precrimping, to also include a step of fixing the first and/or second sheet with regard to the crimping bed, in particular by way of a holding-down device.
  • the method can additionally include one or more acts for applying an adhesive, in particular what is referred to as a lining adhesive, in order to adhesively bond at least the two sheets, in addition to bordering, with the aid of the adhesive and additionally to seal them off in that the adhesive can fill a resulting crimp joint.
  • an adhesive in particular what is referred to as a lining adhesive
  • the adhesive can be applied to the first sheet and/or to the second sheet and be cured after the crimping operation has been completed.
  • the retrofitting method includes the acts of:
  • existing crimping installations can be extended to form a mixed configuration consisting of known crimping robots and crimping units according to the invention or the previous crimping robots can be replaced in their entirety.
  • one or more crimping units can be added at defined locations in addition to existing crimping robots, or replace the latter, in order to allow easy, quick and secure crimping at least locally.
  • this can be in particular a hem segment in the region of the window channel, which is accessible only with difficulty with the conventional crimping tools and usually requires a complicated tool change between the precrimping step and the hemming step.
  • the described retrofitting possibility allows the previous plant to be replaced and improved, such that the cycle time can be significantly reduced.
  • an increased and reproducible quality of the crimping is achieved.
  • the described crimping unit can be produced with comparatively low technical outlay and can be combined easily in a modular manner. It is accordingly possible to dispense with conventionally used roll hemming heads in these fields.
  • FIG. 1 shows a first embodiment of a crimping unit according to the description.
  • FIG. 2 shows a first method step for crimping a workpiece with a second embodiment of a crimping unit according to the description.
  • FIG. 3 shows a second method step.
  • FIG. 4 shows a third method step.
  • FIG. 5 shows a fourth method step.
  • FIG. 6 shows a fifth method step.
  • FIG. 7 shows a sixth method step.
  • FIG. 8 shows a seventh method step.
  • FIG. 9 shows a schematic plan view of a third embodiment of a crimping tool according to the description.
  • FIG. 1 shows a crimping unit 11 for a first embodiment, illustrated in parts, of a crimping tool 10 for crimping a workpiece W.
  • the crimping unit 11 has a stand element 12 for fastening the crimping unit 11 and a carrier element 13 which is connected to the stand element 12 so as to be movable linearly in a first direction of movement A relative to the stand element 12 .
  • the crimping unit 11 has a slide element 14 which is connected to the carrier element 13 so as to be movable linearly in a second direction of movement B relative to the carrier element 13 .
  • the crimping unit 11 is configured such that the second direction of movement B is oriented substantially perpendicularly to the first direction of movement A.
  • a crimping element 15 is provided, which is configured to crimp the workpiece W and is connected rigidly to the slide element 14 .
  • the crimping element 15 has a first crimping portion 15 a which is inclined at an angle ⁇ 1 to the first direction of movement A at least for precrimping the workpiece W.
  • first crimping portion 15 a can be configured in a curved manner.
  • a corresponding crimping element is illustrated in FIGS. 2 to 8 and can also be used for this first embodiment instead of the inclined first crimping portion 15 a.
  • the crimping element 15 has a second crimping portion 15 b which is provided at least to finish-crimp the workpiece W. This is arranged adjacently to the first crimping portion 15 a and is oriented perpendicularly (angle ⁇ 2 ) to the first direction of movement A, and thus substantially parallel to the second direction of movement B, in the embodiment illustrated, and has a substantially flat surface for producing a “normal crimp”.
  • the carrier element 13 is movable at least between a first starting position and at least one further position, which are described in more detail in FIGS. 2 to 8 , in the first direction of movement A.
  • the same goes for the slide element 14 , which is movable at least between a second starting position B′ 1 , a precrimping position B′ 2 and a finish-crimping position B′ 3 in the second direction of movement B.
  • the carrier element 13 and the slide element 14 can furthermore each be movable in desired intermediate positions between said positions.
  • the drives for the carrier element 13 and the slide element 14 are not illustrated. However, they can each be configured to be movable linearly by a pneumatically and/or hydraulically actuable drive, in particular a lifting cylinder, and/or an electromechanical drive.
  • the crimping unit 11 is part of the only partially illustrated crimping tool 10 .
  • the latter furthermore includes a crimping bed 19 for receiving the workpiece W to be crimped.
  • the crimping tool 10 can include at least one holding-down device for fixing the workpiece W to the crimping bed 19 , said holding-down device likewise not being illustrated.
  • the crimping unit 11 is arranged such that the first direction of movement A is oriented for a lifting movement or lowering movement of the carrier element 13 relative to the crimping bed 19 , and the second direction of movement B is oriented for a linear movement of the crimping element 15 in the direction of the crimping bed 19 .
  • the first direction of movement A thus corresponds to a substantially vertical direction of movement and the second direction of movement B corresponds to a substantially horizontal direction of movement.
  • FIGS. 2 to 8 illustrate the method acts for crimping a workpiece W′ with an only partially illustrated crimping tool 20 .
  • a crimping bed 29 and a crimping unit 21 are provided, the latter being optionally inclined slightly in the direction of the crimping bed 29 compared with the first embodiment illustrated in FIG. 1 .
  • the tilted arrangement affords the possibility of adapting the crimping element and the crimping direction to a possible inclined position of the workpiece or of the flange F′, such that the first direction of movement A′ is directed parallel to the orientation of the flange F′.
  • the crimping unit 21 For the sake of clarity, of the crimping unit 21 , only the carrier element 23 and the slide element 24 or the crimping element 25 are illustrated. Of course, the crimping unit 21 can nevertheless likewise include the components thereof that are not illustrated. In contrast to FIG. 1 , the slide element 24 and the crimping element 25 are embodied in one piece with one another such that the two elements 24 , 25 are designated together only as “slide element 24 ” in the following text. In addition, the crimping element 25 has a curved crimping portion 25 a.
  • the method for crimping the workpiece W′ comprises the step, illustrated in FIG. 2 , of inserting the workpiece W′, which has a first sheet W′ 1 , for example an outer skin, and a second sheet W′ 2 .
  • the two sheets W′ 1 and W′ 2 can be arranged in the crimping bed 29 of the crimping tool 20 together or in succession.
  • the first sheet W′ 1 is already embodied with a flange F′ that is angled at about 90 ° to another surface of the sheet W′ 1 .
  • the carrier element 23 and the slide element 24 are each in their starting positions, which allow the insertion and arrangement of the first and second sheets W′ 1 , W′ 2 .
  • first of all a linear movement of the slide element 24 in the second direction of movement B′ for arranging the crimping element 25 , in particular the first crimping portion 25 a , over the flange F′ to be precrimped is illustrated.
  • the movement thus extends from the starting position B′ 1 of the slide element 24 in the second direction of movement B′ as far as the precrimping position B′ 2 of the slide element 24 , wherein the movement points in the direction of the crimping bed 29 .
  • the step of precrimping the flange F′ of the first sheet W′ 1 takes place with the aid of the crimping element 25 , which is displaced in the first direction of movement A′ by a first linear movement of the carrier element 23 .
  • the carrier element 23 is lowered from the starting position A′ 1 into a precrimping position A′ 2 , such that the flange F′ is impinged on by the curved first crimping portion 25 a and follows the surface geometry of the lowering first crimping portion 25 a. Accordingly, the flange F′ is bent over laterally.
  • the described sequence and orientation of the directions of movement A′, B′ has the particular advantage that the flange F′ is pressed against the crimping bed 29 by the linear movement of the carrier element 23 . Lateral deviation of the sheets W′ 1 , W′ 2 and associated folding of the sheets W′ 1 , W′ 2 can thus especially be prevented.
  • FIG. 5 for preparing the step of finish-crimping following precrimping, first of all a return movement of the carrier element 23 counter to the precrimping movement of the carrier element 23 in the first direction of movement A′ is provided.
  • the carrier element 23 thus first of all carries out a lifting movement, which is directed counter to the lowering movement illustrated in FIG. 4 .
  • a linear movement, illustrated in FIG. 6 , of the slide element 24 in the second direction of movement B′ takes place out of the precrimping position B′ 2 into a finish-crimping position B′ 3 for positioning the crimping element 25 , in particular the second crimping portion 25 b , above the precrimped flange F′.
  • the actual step of finish-crimping the precrimped flange F′ takes place according to FIG. 7 with the crimping element 25 by way of a second linear movement of the carrier element 23 in the first direction of movement A′.
  • the carrier element 23 is lowered again in order to press the second crimping portion 25 b against the precrimped flange F′.
  • the carrier element 23 and the slide element 24 are moved into the end positions A′ 1 , B′ 1 , illustrated previously in FIG. 2 , again, in order to remove the crimped workpiece W′ and to be able to insert new sheets.
  • the method can furthermore include a step of fixing (not illustrated) the first and/or second sheet with regard to the crimping bed, in particular by way of a holding-down device (likewise not illustrated).
  • FIG. 9 shows a schematic plan view of a third embodiment of a crimping tool 90 in accordance with the description.
  • the crimping tool 90 can include a plurality of crimping units 91 (for example two crimping units 91 are illustrated), wherein the crimping units 91 are arranged adjacently to one another in order to increase a width of the hem portion, to be crimped, of the workpiece W′′.
  • the crimping units 91 are preferably designed in an identical manner and enclose the crimping bed 99 only partially in the peripheral direction thereof (corresponds in this case to the plane of the drawing). Alternatively, however, several crimping units can also be provided, which entirely enclose the crimping bed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US15/451,491 2014-09-12 2017-03-07 Crimping Unit for a Crimping Tool Abandoned US20170173656A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014218280.8 2014-09-12
DE102014218280.8A DE102014218280A1 (de) 2014-09-12 2014-09-12 Bördeleinheit für ein Bördelwerkzeug
PCT/EP2015/069114 WO2016037821A1 (de) 2014-09-12 2015-08-20 Bördeleinheit für ein bördelwerkzeug

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/069114 Continuation WO2016037821A1 (de) 2014-09-12 2015-08-20 Bördeleinheit für ein bördelwerkzeug

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US15/451,491 Abandoned US20170173656A1 (en) 2014-09-12 2017-03-07 Crimping Unit for a Crimping Tool

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US (1) US20170173656A1 (de)
EP (1) EP3191238A1 (de)
CN (1) CN106488814A (de)
DE (1) DE102014218280A1 (de)
WO (1) WO2016037821A1 (de)

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CN212503294U (zh) * 2020-06-04 2021-02-09 京东方科技集团股份有限公司 翻折装置
CN112338089A (zh) * 2020-10-09 2021-02-09 江苏富浩电子科技有限公司 一次折边料带吸废料一体机构
CN114012411B (zh) * 2021-09-29 2023-10-27 山西江淮重工有限责任公司 翻边装置
CN114433744A (zh) * 2022-01-10 2022-05-06 江阴创意科技有限公司 一种用于隔热罩的成型工艺

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JPH0790299B2 (ja) 1991-08-01 1995-10-04 トライエンジニアリング株式会社 ローラー式ヘミング加工方法
DE19947518C1 (de) 1999-10-01 2001-03-15 Thyssenkrupp Ind Ag Verfahren zum Vor- und Fertigfalzen von Bauteilen und Falzvorrichtung zur Durchführung dieses Verfahrens
DE10112656A1 (de) * 2001-03-16 2002-09-19 Bayerische Motoren Werke Ag Bördeleinheit
JP4483192B2 (ja) * 2003-03-31 2010-06-16 オイレス工業株式会社 ホルダユニット及びそのホルダユニットを具備したヘミング加工装置
DE10338537A1 (de) * 2003-08-19 2005-03-24 Cubo Gmbh Vorrichtung zum Vor-und Fertigfalzen
ITTO20030906A1 (it) * 2003-11-14 2005-05-15 Ol Ci S R L Macchina per la lavorazione di parti in lamiera metallica, in particolare macchina flangiatrice, e sistema di azionamento per una tale macchina.
CN1898059B (zh) * 2003-12-03 2012-07-25 乔纳森·莱奥·坎彼安 带有短凸缘的片材的成形和连接
CN101166588B (zh) * 2005-04-27 2011-04-06 本田技研工业株式会社 辊子卷边方法和辊子卷边装置
KR101360332B1 (ko) * 2007-03-05 2014-02-21 현대자동차 주식회사 프레스 장치
DE102009059676B4 (de) * 2009-12-19 2013-04-18 Thyssenkrupp Drauz Nothelfer Gmbh Verfahren und Vorrichtung zum Falzen von ein oder mehreren Blechen

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DE102014218280A1 (de) 2016-03-17
EP3191238A1 (de) 2017-07-19
WO2016037821A1 (de) 2016-03-17
CN106488814A (zh) 2017-03-08

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