EP3253509A1 - Verfahren und vorrichtung zum auskragen eines werkstücks - Google Patents
Verfahren und vorrichtung zum auskragen eines werkstücksInfo
- Publication number
- EP3253509A1 EP3253509A1 EP16702528.7A EP16702528A EP3253509A1 EP 3253509 A1 EP3253509 A1 EP 3253509A1 EP 16702528 A EP16702528 A EP 16702528A EP 3253509 A1 EP3253509 A1 EP 3253509A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- collar
- workpiece
- region
- tool
- drawn
- 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
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
- B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
- B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming
-
- 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
- B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/08—Stamping using rigid devices or tools with die parts on rotating carriers
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/22—Deep-drawing with devices for holding the edge of the blanks
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/30—Deep-drawing to finish articles formed by deep-drawing
Definitions
- the present invention relates to a method and an apparatus for producing a collar on a workpiece. Collar or necks are attached to workpieces such as blanks or others
- Prefabricated parts needed for different purposes, for example as a guide support, as a stiffening support or as a thread carrier.
- the necessary collar for this purpose, for example, by means of a forming process, the so-called collar pulling or necking, made on the workpiece.
- the width of the previously produced hole can be made wide, with a collar usually forming perpendicular to the workpiece.
- the degree of expansion can be made dependent on the achievable collar length and / or the size of the expansion to be achieved.
- the hole widening capability is dependent not only on the initial or to-be-achieved hole size, but also on the material itself, which limits the achievable collar size and / or collar length.
- soft, deep-drawable steels have good hole widening capability. Accordingly, that is
- the sheet is inserted into a tool and widened the opening of the perforated, flat sheet by means of a tapered punch and formed a collar.
- the material around the hole should be sufficient to form the collar of the desired length.
- a method and an apparatus for necking out of sheet metal using a punch and a counter-holder is also known, wherein the Ausforms ban the neck collar is to be achieved reliably.
- a flat, provided with a hole sheet is inserted into a device and formed there by means of a punch and a die a collar.
- An improvement of the process reliability should be achieved in that a counter-holder is articulated in order to better abut the sheet metal can.
- the present invention has for its object to provide a method and apparatus for producing a collar on a workpiece available, with large collar lengths can be achieved with good quality even in high-strength metals, especially high-strength steels in a simple manner.
- the object is achieved according to a first teaching of the present invention in a generic method in that the method comprises the following steps: preforming a portion of the workpiece to form a
- the collar includes the frame portion and the expanded drawing sheet portion portion.
- press-based process steps can be implemented, since in particular the collar pulling and widening can be realized by a drawing punch.
- Workpiece made which can serve specifically to support the collar pulling operation. For example, this can provide additional material and / or facilitate the flow of the material into the drawn area. For example, by preforming to form a material reserve, the material in the area of the material reserve can be accumulated, so that for the
- Collar pulling additional material is available.
- a special geometry of the workpiece can be provided, which promotes the collar pull.
- the material of the material reserve can flow during the collar pull especially in the frame area.
- the material reserve is consumed after the collar of the workpiece.
- the workpiece is preferably made of metal, in particular of steel.
- steel both soft deep-drawing steels as well as higher-strength or high-strength steels are considered.
- the workpiece may be a substantially planar, in particular unperforated board, a sheet, a semi-finished or a nearly finished molded component.
- the process can then very efficiently a collar be formed directly on the board.
- the collar pulling in the process is then, for example, a single-stage collar pulling operation.
- the workpiece may also be an already formed, for example, a drawn workpiece, such as a finished part.
- the collar pulling can thus be performed in several stages, for example, in different tools to further increase the collar length and perform the individual process steps flexible.
- the Kragen ist in the process then represents, for example, the last Kragenzieh Kunststoff. Die
- Material reserve can thus be formed, for example, before the beginning of the collar pulling or before the last collar drawing step.
- the method may, for example, be part of a cold forming or hot working, or be integrated into such.
- Collar pulling direction preferably at most the maximum expansion width of
- the collar pulling can be done for example by means of a drawing punch and an adapted die.
- the die for example, has a Aushalskontur, in which the Zargen Suite can be formed, whereby the collar pull can be done during the process reliable process.
- the punching is preferably carried out by means of a cutting punch.
- a combined drawing punch is used, which has a cutting edge, preferably a rounded cutting edge on the drawing punch bottom, so that the punching can be done with this stamp.
- the region of the material reserve lies at least partially outside the region to be drawn. Under the area to be drawn is understood in particular the contact area of the drawing punch with the workpiece.
- Material reserve complete outside the area to be pulled.
- the area of the material reserve is provided in the flange area.
- the region of the material reserve can be provided at a defined distance from the collar-pulling region and can reliably provide material during collar-pulling.
- the area of the material reserve can also be formed in the area to be pulled, that is to say in the region of the drawing floor, whereby a thinning in the region of the, in particular, ground drawing radius can be counteracted.
- one or more elevations, in particular in the form of beads are formed by preforming the area for forming the material reserve.
- one or more circumferential, in particular concentric elevations, in particular in the form of beads are formed around the area to be pulled.
- at least two concentric beads are provided around the area to be drawn.
- the surveys are provided against the Kragenziehraum so that the workpiece safely despite the surveys on the tool for
- Material reserve conceivable, for example, by a thickening material or a
- the preforming of the area for the formation of the material reserve takes place as a function of properties of the workpiece and / or the collar shape to be achieved. Because the area of the material reserve is tailored as a function of the collar shape, reliable production of the collar can be achieved with little effort. For example, the geometry of the area of the material reserve in
- the height, the width and / or the shape of the beads can be made dependent on the material and / or the workpiece thickness.
- the distance of the beads can be made dependent on the material properties. For example, the height of the beads is chosen so that the elongation of the material is not exceeded.
- a length of the workpiece additionally generated by the preforming in the area of the material reserve is dimensioned such that the
- the preforming of the area for forming the material reserve includes, at least in sections, a pre-stretching up to a maximum of the yield strength of the material. It has been shown that by pre-stretching the material and the resulting additional length, the flow of the material from the material reserve into the frame area can be improved and the material reserve can be provided simply and efficiently. Preferably, the extensibility of the material is not exceeded, otherwise the process reliability and quality would be impaired.
- the area of the material reserve essentially corresponds to the collar-length of the workpiece.
- Collar pulling process now additional material can be provided by the material reserve.
- the extent of the area or the cross-sectional length of the area substantially corresponds to the collar length.
- the workpiece in the region of the material reserve during the collar pulling at least temporarily and at least partially acted upon by a particular controlled force for example by the hold-down in Kragenziehraum. Due to the particularly controlled application of force, the material reserve can additionally be pressed into the area to be pulled, which in particular can further improve the material flow in the frame area.
- the preforming of the area for forming the material reserve takes place in a first tool or tool section and at least the collar pulling in a second tool or tool section. In this way, the preforming of the
- Collar pull can be integrated into existing procedures.
- the first tool can optionally also be integrated into other work steps, such as first collar-pulling operations or cutting of the workpiece.
- Workpiece can then be removed and then into the second tool be inserted.
- the workpiece is brought, for example, between a drawing punch and a die with hold-down. After collaring, punching and
- the workpiece can be removed with finished trained collar the second tool.
- Preforming means for preforming a portion of the workpiece to form a material reserve for a collar pulling operation with means for collaring, which are adapted to pull the workpiece such that the workpiece has a drawn adjacent to a flange region drawn area with a Zargen Society and with a to the Zargen Scheme subsequent drawing tray, with means for punching, which are adapted to punch the drawing tray, so that a subsequent to the frame portion Ziehgen inconvenienceteil Suites arises, and with means for expansion, which are adapted to expand the Ziehbodenteil Complex.
- the combination of the frame region and the expanded drawing-sheet partial region makes it possible to form a longer and more precise collar, while the device can be easily realized by means of press-supported devices.
- a material reserve can be formed for a subsequent collar pulling operation, so that in combination with the means for collaring, punching and widening with the apparatus, the collar length can be increased particularly effectively, even with high-strength materials.
- high quality requirements can be met because enough material can be drawn into the frame area and thus the floor area does not thinn excessively.
- the device has means for fixing the workpiece.
- the means for fixing the workpiece may be formed such that the workpiece with its flange portion in the device, in particular during the collar pulling, Punching and widening is fixed.
- the means for fixing can be realized for example by a particular pressure-controlled hold-down.
- the device has a first tool or a first tool portion and a second tool or a second tool portion, wherein the first tool or first tool portion having the preforming means and wherein the second tool or the second tool portion comprises the means for collaring, the means for punching and the means for expanding.
- the preforming means for forming the region of the material reserve are adapted to form one or more elevations, in particular in the form of corrugations, preferably with uniform radii.
- the device has means for at least temporary and at least partially controlled, in particular controlled application of force to the workpiece in the flange area during the collar pulling.
- the means for applying force is provided.
- the material from the region of the material reserve can additionally be pressed into the region to be drawn, which can improve the material flow.
- the means for collar pulling comprise a drawing punch and the means for punching a on
- Drawing punch bottom arranged, in particular rounded cutting edge and a drawing die opposite and arranged adapted to the cutting edge Perforated die.
- the cutting edge protrudes, for example, in Kragenziehraum and spaced from the drawing punch edge of the drawing punch bottom out.
- the drawing punch can also serve to expand the Ziehêtteil Schemes.
- Press-based devices can be realized.
- the collar pulling, punching and widening is realized, for example, only by a movement of the drawing punch in a Kragenziehraum.
- the means for collaring further comprise a die with a
- Aushalskontur so that the workpiece by means of a relative movement of the punch and die can be subjected to a drawing process, so that the collar can be formed by the punch along the Aushalskontur.
- the stamp seen in collar pull direction may have different cross-sectional shapes, such as a round, oval or square cross-section.
- the drawing punch has a substantially round cross-section or is of rotationally symmetrical design.
- the preferably rounded cutting edge is arranged concentrically on the drawing punch bottom.
- the drawing bottom can basically be formed parallel or obliquely to the flange region of the workpiece.
- the boundary line of the drawing floor may be circular, wavy or otherwise shaped.
- drawing die bottom apart from the cutting edge, is substantially flat and extends transversely to the collar pulling direction, unwanted overstretching of the drawing bottom is avoided and more material can flow from the flange region into the frame region.
- a circular, in particular rounded, cutting edge and a particularly sharp-edged perforated die adapted thereto can be provided, so that a circular opening can be punched into the drawing bottom.
- the cutting edge is rounded.
- the cutting edge is greater than 0.15 mm, in particular greater than 0.25 mm, preferably up to 1 mm.
- the radius of the cutting edge is between 0.3 and 0.8 mm.
- an inhibiting element is provided, which for temporary particular defined
- Inhibitor be exercised.
- the inhibiting element is designed as a transversal to the collar pulling movable plow, which inhibits the movement of the perforated die in Kragenziehraum.
- the thrust wedge can release the movement of the perforated die in the collar pulling direction, in particular if the defined restraining force of the perforated die exceeds the cutting force required for punching the drawing bottom part.
- the pusher is spring-loaded.
- the thrust wedge and the perforated die have mating sliding surfaces, which allow sliding of the perforated die on the thrust wedge and displacement of the thrust wedge.
- the perforated die is also spring-loaded to allow a further force against the Kragenziehraum.
- the device is on the
- FIG. 1 is a schematic view of an embodiment of a first
- Fig. 2 is a schematic view of the first tool or
- FIG. 1 A schematic view of an embodiment of a second
- Fig. 4, 5 is a schematic view of the second tool or
- Fig. 6 is a schematic view of the second tool or
- Fig. 7 is a schematic view of the second tool or
- Fig. 8 is a schematic view of the second tool or
- Fig. 1 shows a schematic view of an embodiment of a first
- Tool or tool section 1 of a device prior to the formation of a material reserve is shown in a partial longitudinal section, and is constructed symmetrically about the axis A.
- the tool or the tool section 1 is installed in a suitable, not shown here press and has an upper die la and a matching lower die or
- Stamp lb preforming means for forming a portion 4 of a workpiece or Workpiece section 2 on.
- the workpiece or the workpiece portion 2 in the form of a board or a sheet is placed with the press open between the dies la, lb. Due to the geometry of the pressing surfaces, a region 4 of the workpiece 2 can be reshaped by the tool 1, so that a material reserve for a later collar pulling operation is formed in the region 4.
- the upper die la is moved toward closing the tool 1 in the direction of the arrow 6 on the lower die.
- FIG. 2 shows a schematic view of the first tool 1 from FIG. 1 after the formation of a material reserve in the region 4 of the tool 2
- Elevations formed in the form of two circumferential concentric beads 6a, 6b Elevations formed in the form of two circumferential concentric beads 6a, 6b.
- the pre-forming with the tool 1 caused a pre-stretching of the material in the area 4 of the beads 6 a, 6 b and the adjoining areas, which led to an extension of the cross-sectional length in the region 4 of the workpiece or workpiece section 2.
- Collar pulling process serve as a material reserve.
- the tool 1 can also be a tool section of a more complex tool, not shown, it is in principle possible for this tool to also carry out further machining operations, for example further deformations, of the workpiece 2 during the closing of the press.
- Fig. 3 shows a schematic view of an embodiment of a second
- the device 10 is also constructed symmetrically about the axis A. It has with a movable in Kragenziehraum 8 drawing punch or pull-cutting punch 12 means for collaring of the workpiece 2.
- the drawing punch has a rounded cutting edge 16 arranged on the drawing die bottom 14. The cutting edge 16 protrudes in Kragenziehraum 8 from the drawing punch bottom 14 addition. This avoids the risk of premature
- the tool 10 also has means for fixing the workpiece 2 with the hold-down device 18. As shown by the arrow 9, the hold-down can the
- the tool 10 further has a die 26, whose cross-sectional contour represents the Aushalskontur 28 and is adapted to the drawing die 12.
- a perforated die 30 is resiliently mounted and adapted to the cutting edge 16 to allow a punching of the drawplate portion 42.
- a spring element 32 is provided, which can act on the perforated die with a force against the collar pulling 8.
- the die 26 is also a
- Inhibiting element stored in the form of a thrust wedge 34.
- the pusher supports the
- the pusher wedge 34 presses with a spring element 36 under the perforated die 30.
- the perforated die 30 and the pusher wedge 34 have mutually adapted sliding surfaces 38, 40, which allow sliding of the punch die 30 on the pusher wedge 34.
- 4 and 5 show a schematic view of the second tool 10 of Fig. 3 during the collar pulling.
- the drawing punch 12 is moved in Kragenziehraum 8.
- a drawn region forms in the workpiece 2 with a frame region 44 adjoining the flange region 20 and with a drawing bottom 42 adjoining the frame region.
- the collar pulling material is provided by the area 4 for the collar pulling process and pulled into the frame portion 44.
- the frame portion 44 can be formed longer than with the conventional methods, while the drawing tray 42 is not substantially thinned.
- the beads 6a, 6b are substantially smoothed during the collar drawing. The fact that a rounded cutting edge 16 is provided, which is the
- Fig. 6 shows a schematic view of the second tool
- the back pressure of the punch die 30 on the punch 12 is limited by the provision of the sliding surfaces 38, 40 on the Lochmatrize 30 and the pusher wedge 34 and the spring bearing of the pusher 34 to the necessary cutting force for punching the Zieh foundedteils. If the force limit is exceeded, the thrust wedge 34 deviates outward transversely to the collar pulling direction 8 in the direction of the arrow 48.
- FIG. 7 shows a schematic view of the second tool or tool section 10 of FIG. 3 after the expansion of the drawing tray portion 45.
- the collar comprising longitudinal portions of the frame portion 44 and the widened drawing base portion 45, a long collar can be formed without Material failure from the area 4 of the material reserve and the rounded cutting edge 16 occurs.
- Collar pulling direction 8 drive to the starting position, wherein the workpiece
- FIG. 8 shows a schematic view of the second tool or tool section 10 from FIG. 3 after ejection.
- the workpiece 2 has been conveyed out of the die 26 by the spring-loaded punching die 30 for removal from the tool 10.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015101717.2A DE102015101717A1 (de) | 2015-02-06 | 2015-02-06 | Verfahren und Vorrichtung zum Auskragen eines Werkstücks |
PCT/EP2016/052042 WO2016124528A1 (de) | 2015-02-06 | 2016-02-01 | Verfahren und vorrichtung zum auskragen eines werkstücks |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3253509A1 true EP3253509A1 (de) | 2017-12-13 |
EP3253509B1 EP3253509B1 (de) | 2019-09-04 |
Family
ID=55275088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16702528.7A Active EP3253509B1 (de) | 2015-02-06 | 2016-02-01 | Verfahren und vorrichtung zum auskragen eines werkstücks |
Country Status (5)
Country | Link |
---|---|
US (1) | US10118211B2 (de) |
EP (1) | EP3253509B1 (de) |
CN (1) | CN107206452B (de) |
DE (1) | DE102015101717A1 (de) |
WO (1) | WO2016124528A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109685779B (zh) * | 2018-12-14 | 2021-07-02 | 凌云光技术股份有限公司 | 一种工件边宽检测方法 |
DE102023001962A1 (de) | 2023-05-15 | 2023-12-21 | Mercedes-Benz Group AG | Gegenprägen einer Sicke in einem Blech |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1613961A (en) | 1923-12-10 | 1927-01-11 | Winnifred B Parish | Die mechanism |
DE1452669A1 (de) * | 1965-12-09 | 1969-03-27 | Golde Gmbh H T | Verfahren zur Erzeugung von Muttern fuer Schraubenverbindungen aus Blechmaterial undVorrichtung zu dessen Durchfuehrung |
JPS5742569Y2 (de) * | 1974-10-28 | 1982-09-20 | ||
JPS5155856A (ja) * | 1974-11-13 | 1976-05-17 | Hitachi Ltd | Kaitenjikushiirusochi |
GB1539793A (en) | 1975-04-21 | 1979-02-07 | Hitachi Ltd | Plastic working of metal |
JPH0724871B2 (ja) * | 1988-03-31 | 1995-03-22 | 松下電器産業株式会社 | 熱交換器用フィンのカラー成形法及び金型 |
SU1562043A1 (ru) | 1988-06-21 | 1990-05-07 | Предприятие П/Я А-7179 | Штамп дл выт жки |
JP2643336B2 (ja) * | 1988-08-10 | 1997-08-20 | トヨタ自動車株式会社 | バーリング加工方法および装置 |
US5237849A (en) * | 1992-02-19 | 1993-08-24 | Hidaka Seiki Kabushiki Kaisha | Method of manufacturing fins for heat exchangers |
WO1998015369A1 (fr) * | 1996-10-07 | 1998-04-16 | Kabushiki Kaisha Kanemitsu | Procede de formation d'une bosse solidaire d'une tole |
FR2877864B1 (fr) | 2004-11-16 | 2008-02-01 | Renault Sas | Fixation de tole par fluo taraude a embase conique |
JP2006205232A (ja) * | 2005-01-28 | 2006-08-10 | Toyota Motor Corp | バーリング加工方法、及び、バーリング加工装置 |
DE102006029124B4 (de) | 2006-06-22 | 2009-09-10 | Benteler Automobiltechnik Gmbh | Auskragen von Blechteilen |
DE102008017728B4 (de) * | 2008-04-07 | 2012-05-16 | Thyssenkrupp Steel Europe Ag | Verfahren zur Materialflusssteuerung beim Tiefziehen eines Werkstücks |
SE533132C2 (sv) * | 2008-11-18 | 2010-07-06 | Scania Cv Abp | Förfarande och anordning för pressning av en krage i en metallplåt, samt krage och plåtbleck |
DE102011117066B4 (de) * | 2011-10-27 | 2022-10-13 | Benteler Automobiltechnik Gmbh | Vorrichtung zur Herstellung eines warmumgeformten und pressgehärteten Kraftfahrzeugkarosseriebauteils sowie Verfahren zur Herstellung |
JP2013126673A (ja) | 2011-12-19 | 2013-06-27 | Ricoh Co Ltd | 薄板バーリング加工方法及び薄板雌ねじ形成方法 |
JP5892150B2 (ja) * | 2013-12-09 | 2016-03-23 | ダイキン工業株式会社 | 熱交換器用フィンのアイアニング加工装置、熱交換器用フィン製造方法及び熱交換器製造方法 |
-
2015
- 2015-02-06 DE DE102015101717.2A patent/DE102015101717A1/de not_active Ceased
-
2016
- 2016-02-01 WO PCT/EP2016/052042 patent/WO2016124528A1/de active Application Filing
- 2016-02-01 US US15/548,374 patent/US10118211B2/en not_active Expired - Fee Related
- 2016-02-01 EP EP16702528.7A patent/EP3253509B1/de active Active
- 2016-02-01 CN CN201680009133.2A patent/CN107206452B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN107206452A (zh) | 2017-09-26 |
DE102015101717A1 (de) | 2016-08-11 |
US10118211B2 (en) | 2018-11-06 |
WO2016124528A1 (de) | 2016-08-11 |
EP3253509B1 (de) | 2019-09-04 |
US20180036784A1 (en) | 2018-02-08 |
CN107206452B (zh) | 2020-07-14 |
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