EP3183189A1 - Container base and tool and method for producing same - Google Patents
Container base and tool and method for producing sameInfo
- Publication number
- EP3183189A1 EP3183189A1 EP15760105.5A EP15760105A EP3183189A1 EP 3183189 A1 EP3183189 A1 EP 3183189A1 EP 15760105 A EP15760105 A EP 15760105A EP 3183189 A1 EP3183189 A1 EP 3183189A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contour
- radius
- container bottom
- container
- connection
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/12—Large containers rigid specially adapted for transport
- B65D88/128—Large containers rigid specially adapted for transport tank containers, i.e. containers provided with supporting devices for handling
-
- 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
-
- 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
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
Definitions
- the present invention relates to a container bottom and a tool and method for its production.
- Container bottoms are usually curved sheet metal elements which serve to close off the ends of a generally cylindrical container or to divide it into a plurality of chambers.
- the containers themselves are usually cylindrical in shape and have different cross-sections (for example, circular, elliptical, double-shelled, four-shelled, box-shaped).
- the container shell is made of one or more curved (produced by rolling)
- Sheet metal elements formed and has a tubular shape with appropriate cross-sectional geometry on.
- the ends of such a jacket shot are closed with corresponding container bottoms.
- the container bottoms are welded to the jacket shot.
- the container bottom has a connection contour corresponding to the jacket shot, so that the jacket and bottom collide at their respective connection contours and can be connected to one another via a butt seam that is advantageous in terms of production and strength.
- connection configurations in which the container bottom is inserted into the jacket shot or attached to this and the connection between the two elements via a so-called fillet weld.
- fillet weld In addition to cylindrical vessel sections, there are also truncated conical designs.
- the container bottoms usually have a cylindrical or conical edge or board, which merges over a relatively narrow curved (toric curved) brim area into a shallower-mostly spherical-curved dome area, which forms the predominant area proportion of the actual floor.
- torispheric floors which have a dished bottom mold according to DIN 28011, a basket bottom shape according to DIN 28013 or are designed as elliptical bottom or as normal / flat curved bottom.
- the production of such soils is usually carried out in a two-stage process, in which starting from a flat sheet metal disc (Ronde or board) - first, the spherical curvature is formed in a pressing process (pods) and then the brim area and the so-called board in a spinning process ( Flanging) is formed. In the case of thin-walled floors, these can also be produced completely in a pressing process (usually a deep-drawing process).
- Container cross-sections are suitable, the diameter of which are in the order of more than 500 mm in one axial direction and over 1000 mm in another axial direction and at a narrow Krempenradius of about 50 to 75 mm have a Völbungstiefe of more than 250 mm.
- Such container bottoms can not be produced at all by simple deep-drawing methods (single-stage) or only with the abovementioned quality defects.
- Multi-stage deep-drawing processes in which the desired geometry is formed stepwise in several different tools and several process steps, may possibly be suitable, but only economically feasible for mass-produced quantities (several thousand). It is therefore an object to provide a non-circular container bottom, which is produced even with relatively high wall thickness and comparatively large dimensions in a single-stage deep drawing process and the final geometry is repeatable and tolerable in a suitable method and one and can be produced with a suitable tool.
- the container bottom according to the invention has a curved dome area with a curvature radius R, a connection contour which has a first radius of curvature in a first contour section and a second radius of curvature in a second contour section, wherein the first radius of curvature is greater than the second radius of curvature and between peripheral contour and Kalotten Stud a the Kalotten Scheme surrounding and the connecting contour following Krempen Stud is formed, which has a first Krempenabêt with a first Krempenradius and a second Krempenabrough with a second Krempenradius, wherein the first Krempenradius is greater than the second Krempenradius.
- the variation of the Krempenradius in a single contour section with flatter curvature optimizes the deformation conditions for a deep drawing process in this area.
- the flow of material is improved so that a largely wrinkle-free transition of all deformed surfaces is feasible, in a single deep-drawing process in which a corresponding board (Ronde) using a thermoforming tool, a punch, a drawing frame and a hold-down and possibly has a counter-shape.
- the stamp geometry corresponds to the container bottom geometry.
- thermoforming both the actual deep drawing, in which the sheet thickness over the drawn part remains approximately constant, so the surface of the board is equal to the surface of the drawn part (container bottom), as well as the so-called ironing, in which the Shaping of the drawn part by a (partial) surface enlargement at the expense of sheet thickness.
- the inventive molding also allows for improved compressive strength (internal overpressure acting on the concave wall portion of the container bottom) which enhances the usefulness of such a container bottom for a pressure vessel.
- compressive strength internal overpressure acting on the concave wall portion of the container bottom
- the minimum wall thickness and thus the weight and the price (material costs) of the floor can be reduced.
- the voltage transitions in the flat curved, cylindrical shell region are made smoother.
- FIG. 1 is a perspective view of a first embodiment of a container bottom according to the invention
- FIG. 2 is a sectional view of the container bottom of FIG. 1
- FIG. 3 is a perspective view of a second embodiment of a container bottom according to the invention
- FIG. 4 is a sectional view of the container bottom shown in Fig. 3,
- FIG. 5 shows a standing container with a container bottom according to the invention
- Fig. 6 is a tank container assembly with a horizontally disposed container with a
- Fig. 7 is a perspective view of a resulting after the thermoforming process blank for a container bottom according to FIGS. 1-4, and
- FIG. 8 shows a schematic process sequence of a method according to the invention for
- FIG. 1 an embodiment in accordance with the present invention is illustrated. Before a detailed description first follows general explanations to the embodiments.
- the Krempen has (possibly different) curvatures.
- the curvature which is indicated by the so-called Krempenradius or Krempenkurümmung.
- This Krempenradius lies in a cutting plane, the runs normal to Krempen- or bottom surface and indicates the curvature of the brim area in this plane.
- the rim area describes a torus or a partial area of a torus (envelope surface which forms a circular contour when it is displaced along a ring running through its center point).
- this curve defining the torus is not circular, but in turn has differently curved regions, as is the case with non-circular container or bottom cross sections, then the body produced correspondingly by the rim radius is on the one hand with the one, the rim radius provided corresponding curvature and curved to the other according to the curvature of the generatrix.
- the first (weaker curved brim portion) is arranged between two more curved brim portions, in such a way that the Krempenradius does not change abruptly, but between the first brim portion and the second brim portion is formed in each case a transition portion in which the first Krempenradius merges into the second Krempenradius.
- This measure further contributes to the fact that optimized printing technology and production technology soil structures can be formed.
- a third brim portion is provided along the second (more curved) contour portion having a third Krempenradius.
- this third Krempenradius is formed equal to the second Krempenradius.
- the third Krempenradius may be formed smaller than the second Krempen- radius.
- transition sections are formed in each case between a third brim section and an adjacent second brim section, so that here also differently curved brim surfaces smoothly merge into one another.
- Brim area of the container bottom there is a relatively large section to provide, the contour of which is formed by the line of intersection of a there opening tangentially into the container tube.
- This intersection contour is relatively complex, and can be problematic in terms of printing and production engineering.
- a relatively long weld is required for connection with which a corresponding pipe socket is to be welded into the container bottom. Therefore, there are embodiments in which in the first, second and / or third Krempenabites- depending on the position of the container- a connection area is formed, which has a connection contour which describes a circular cylinder section, in particular an oblique circular cylindrical section.
- Such a connection region can be formed in the corresponding deep drawing process by a corresponding design on the pressing tool.
- Connection pipe also needs to be cut only at an angle, without having to have a complex sectional contour, which would be required for direct connection to the container rim.
- connection area can be formed so that it is suitable both for a horizontal (with horizontally extending longitudinal axis) and for a stationary container (with a vertical longitudinal axis).
- the connection region is then shaped so that it opens tangentially from the connection contour, optionally with corresponding fillets, into the collar or shelf of the container bottom (horizontal arrangement of the container) and / or opens tangentially into the lowest point of the dome region of the container bottom ( standing arrangement of the container).
- connection area only needs to be cut out in the area of the connection contour and following it. There then a corresponding obliquely cut pipe can be connected.
- the first Krempenradius is 1.5 to 3 times the second Krempenradius, in other embodiments, it is 1.8 to 2.5 times, and there are also versions in which he 2 times the second Krempenradius.
- These conditions have proven themselves in terms of manufacturing and the printing design of such container bottoms. They allow a production-technically favorable design and / or a pressure-technically favorable design or else an advantageous design with regard to the structural strength of the container in the brim area, which can optionally be connected thereto via intermediate elements with supporting structures.
- the following relationship exists between the curvature radius and the first radius of curvature. These are in a ratio of 2.6 to 1 to 1: 1 to each other. In other cases, a range of 1.5: 1 to 1: 1 is provided and there are also embodiments in which a ratio of 1.2: 1 to 1: 1 is provided. This measure makes it possible to realize differently flat (for example oval, bivalve or suitcase-shaped) containers and a wide variety of container geometries, which are optimized either with regard to the available volume or the compressive strength.
- the first rim radius and the radius of curvature are in a ratio of 1:10 to 1:50, in other embodiments, a range of 1:20 to 1:30 is provided and in other embodiments, there is a ratio of 1 : 25th.
- shape or curvature depth T (corresponding to the "ground height” of the connection contour to the vertex vertex) is 3 to 5 times the second rim radius, in particular 3.5 to 4 times and especially the 3, 75-fold.
- connection diameter (or the connection diameter ratios) can be varied by cutting off a correspondingly produced untreated floor at different heights (different board height) so that the remaining on-board area is of different lengths / heights. With a short on-board area, the diameter is correspondingly smaller, but correspondingly larger with a long on-board area.
- Container bottoms according to the invention are formed from a ductile, deformable metal material, in particular from a conventional stainless steel material (for example in the qualities 1.4301, 1.4404, 1.4571).
- the diameter ratio (large to small diameter, width to height with horizontal container, width to depth with standing container) is 2: 1 to 3.5: 1, in particular 3: 1.
- thermoforming tool in particular a stamp, for producing a container bottom according to the invention.
- a further aspect relates to a method for producing a container bottom according to the invention, comprising the steps of providing a sheet metal blank (blank), deforming the sheet metal blank by means of a thermoforming tool to a deep drawing intermediate and trimming a thermoformed intermediate product along a peripheral contour, wherein the peripheral contour formed by a plurality of contour cuts to be performed sequentially becomes.
- This method helps to perform the desired connection contour or circumferential contour of the container bottom repeatable and tolerant.
- the method can also include the formation of a connection opening in the thermoforming intermediate product or in the container bottom.
- FIGS. 1 and 2 show a first embodiment of a container bottom 1 according to the invention which has a curved dome area 2 with a radius of curvature R.
- the dome region 2 merges via a rim region 3 into an on-board region 4, which ends in a connection contour 5 which corresponds to the container cross-section.
- connection contour 5 has a flat curved first in the top and bottom area
- Contour section 6 with a first radius of curvature ⁇ on.
- the two first contour sections 6 are connected to each other via second, more curved contour sections 7 in the flank regions, which have a radius of curvature r 2 , wherein the connection contour 5 extends smoothly over the first and second contour sections 6 and 7.
- the rim region 3 surrounding the dome region 2 adjoins the dome region 2 with its dome-side edge 8 and, with its connection-side edge 9, adjoins the rim region 4, which is optionally formed between the rim region 3 and the connection contour 5.
- the connection-side edge 9 also forms the connection contour 6.
- the brim area 3 has a first brim section 10 with a rim radius riki.
- This first brim section 10 merges via an optional transition section 11 into a second brim section 12, which has a second rim radius rik2.
- the second brim section 12 adjoins a third brim section 13 which extends in the region of the second contour section 7 and has a third brim wheel radius 2 B.
- the optional rim area 4 extending between the rim area 3 and the connection contour 5 comprises a frustoconical rim area 14 and an adjoining cylindrical rim area 15 which ends in the connection contour 5.
- Bord Struc Struc St. 14 provided or it adjoins directly to the brim area 3, a cylindrical rim area 15 at.
- a frustoconical rim area 14 is provided, which merges into a cylindrical rim area 15 in the area of the second contour section or vice versa.
- depressions 16 are impressed, which are provided for handling the container or the container bottom 1 during manufacture. There, in a defined position fittings (for example, connecting bolts, threaded bolts, etc.) are provided be about which the container bottom 1 can be fixed in a defined position in a handling device.
- fittings for example, connecting bolts, threaded bolts, etc.
- connection region 17 which has a connection edge 18, the contour of which describes a flat circular cylinder section and serves to connect a diagonally cut connection tube 19 (indicated by dashed lines) that along the connection edge
- connection region 17 is formed such that the connection sole 20 extends in the same plane with the sole of the cylindrical flange region 15 or of the cylindrical container section 31 adjoining the connection contour 5 (see FIG. 5). This is a complete emptying of the entire container 30 to realize.
- the connecting pipe 19 To connect the connecting pipe 19, the metal sheet arranged inside the connecting edge 18 is cut out and the connecting pipe
- connection pipe 19 welded to the connection edge 18. If no connection pipe 19 is to be provided, the connection area remains closed.
- connection region 17 ' which is suitable both for a standing (see FIG. 6) and for a horizontal arrangement (see FIG. 7) of a container or the container bottom 1.
- the connection region 17 ' is formed so that it has a connecting sole 20 which runs in a line with the container bottom, and a connecting sole 20', which enters tangentially into the low point T of the Kalotten Schemees 2.
- the connection region 17 ' ends here in a connection edge 18, whose contour corresponds to a straight cylinder section.
- a sampling tube along the tube axis 21 are connected (horizontal container, similar course as in Fig. 2) or alternatively along a tube axis 22 (standing container as shown in Fig. 6, in which the deepest container point in the low point T of the Kalotten Schemees 2 is arranged).
- the connection areas 17, 17 ' are each optionally formed in the container bottom 1.
- Camber radius R 4000 mm
- FIG. 5 shows a cylindrical container 30, which has a cylindrical jacket section 31 corresponding to the connection contour 5, whose upper and lower ends are each closed by a container bottom 1.
- the two connection contours of the container are each welded to the connection contour 5 of the container bottoms 1 by means of a butt seam.
- the container bottom can be inserted into the container shot 31 or attached thereto. The connection then takes place via one or two so-called fillet welds.
- Fig. 5 shows a vertical container whose longitudinal axis 32 extends vertically.
- the container has two reinforcing rings 33, which surround the container shot 31 and are welded thereto.
- the lower container bottom 1 is connected to a ring base 34 which serves as a pedestal.
- Fig. 6 shows a horizontal container arrangement in which also a container 30 is provided, the longitudinal axis 32 but here extends horizontally.
- the container is connected at its ends via ring base 34 with a frame structure 35.
- Frame structure 35 and container 30 form a tank container unit, which is suitable for the transport and storage of liquids.
- FIG. 7 shows a thermoforming intermediate product 36 which is produced during the production of a container bottom 1 according to the invention.
- a flat sheet metal blank Ronde
- this is deformed by means of a punch, which corresponds to the inner shape of the container bottom 1.
- the edge 37 of the board is fixed by means of a hold-down on a thermoforming frame and formed the container bottom shape by pressing the punch into the board.
- the remaining edge 37 on the thermoforming intermediate product 36 is then removed in one or more cutting processes along the cutting lines 38, so that finally the connection contour 5 is formed on the container bottom 1.
- the connection contour 5 is formed on the container bottom 1.
- contour cuts 39, 40 during production which are provided, for example, for connecting a pipe or a fitting.
- the method illustrated in FIG. 8 for producing a container bottom 1 according to the invention basically proceeds in the following steps:
- the step may be provided that a connection opening 39, 40 is provided on the thermoforming intermediate product 36.
- Container bottom 1 or the deep-drawing intermediate product 36 takes place or in a second step, in which the thermoforming intermediate product 36 is processed according to another embossing tool.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL15760105T PL3183189T3 (en) | 2014-08-19 | 2015-08-19 | Container base and method for production same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014111810.3A DE102014111810B3 (en) | 2014-08-19 | 2014-08-19 | Container bottom and tool and method for its production |
PCT/EP2015/069051 WO2016026897A1 (en) | 2014-08-19 | 2015-08-19 | Container base and tool and method for producing same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3183189A1 true EP3183189A1 (en) | 2017-06-28 |
EP3183189B1 EP3183189B1 (en) | 2020-03-18 |
Family
ID=54065324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15760105.5A Active EP3183189B1 (en) | 2014-08-19 | 2015-08-19 | Container base and method for production same |
Country Status (6)
Country | Link |
---|---|
US (2) | US10150611B2 (en) |
EP (1) | EP3183189B1 (en) |
AU (1) | AU2015306180A1 (en) |
DE (1) | DE102014111810B3 (en) |
PL (1) | PL3183189T3 (en) |
WO (1) | WO2016026897A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014111810B3 (en) | 2014-08-19 | 2016-02-18 | WEW Westerwälder Eisenwerk GmbH | Container bottom and tool and method for its production |
USD858213S1 (en) * | 2017-07-18 | 2019-09-03 | Jingdong Wu | Lunch box |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3780901A (en) * | 1972-01-14 | 1973-12-25 | Hahn & Clay | Pin-type vessel closure connector |
US3910447A (en) * | 1974-03-01 | 1975-10-07 | Combustion Eng | Vessel restraint device |
DE8906421U1 (en) * | 1989-05-24 | 1989-08-24 | Zeppelin-Metallwerke Gmbh, 7990 Friedrichshafen | pressure vessel |
US6059372A (en) * | 1997-12-09 | 2000-05-09 | Composite Structures, Inc. | Hopper bottom trailer |
US6401983B1 (en) * | 1997-12-09 | 2002-06-11 | Composite Structures, Inc. | Bulk cargo container |
US6216508B1 (en) * | 1998-01-29 | 2001-04-17 | Amino Corporation | Apparatus for dieless forming plate materials |
DE20005521U1 (en) * | 2000-03-28 | 2000-10-05 | Chemowerk GmbH Fabrik für Behälter und Transportgeräte, 71384 Weinstadt | Standing flat-bottom tank, double-walled, in a transverse oval shape |
JP4908763B2 (en) * | 2005-02-04 | 2012-04-04 | 本田技研工業株式会社 | Forming method of painted steel sheet |
DE112007003721B4 (en) * | 2007-11-29 | 2013-07-04 | Hui Xiao | Sealed composite container for receiving and delivering powder or particulate material |
DE102014111810B3 (en) | 2014-08-19 | 2016-02-18 | WEW Westerwälder Eisenwerk GmbH | Container bottom and tool and method for its production |
US9566892B2 (en) * | 2014-11-10 | 2017-02-14 | Heil Trailer International, Co. | Multi-material tank trailer body |
-
2014
- 2014-08-19 DE DE102014111810.3A patent/DE102014111810B3/en active Active
-
2015
- 2015-08-19 AU AU2015306180A patent/AU2015306180A1/en not_active Abandoned
- 2015-08-19 EP EP15760105.5A patent/EP3183189B1/en active Active
- 2015-08-19 PL PL15760105T patent/PL3183189T3/en unknown
- 2015-08-19 US US15/504,699 patent/US10150611B2/en active Active
- 2015-08-19 WO PCT/EP2015/069051 patent/WO2016026897A1/en active Application Filing
-
2018
- 2018-10-31 US US16/176,671 patent/US20190062043A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20190062043A1 (en) | 2019-02-28 |
US10150611B2 (en) | 2018-12-11 |
WO2016026897A1 (en) | 2016-02-25 |
US20170259990A1 (en) | 2017-09-14 |
AU2015306180A1 (en) | 2017-03-09 |
PL3183189T3 (en) | 2020-09-07 |
EP3183189B1 (en) | 2020-03-18 |
DE102014111810B3 (en) | 2016-02-18 |
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