WO1991001831A1 - Verfahren zur bildung einer platte aus einem band und vorrichtung zur durchführung des verfahrens - Google Patents
Verfahren zur bildung einer platte aus einem band und vorrichtung zur durchführung des verfahrens Download PDFInfo
- Publication number
- WO1991001831A1 WO1991001831A1 PCT/EP1990/001177 EP9001177W WO9101831A1 WO 1991001831 A1 WO1991001831 A1 WO 1991001831A1 EP 9001177 W EP9001177 W EP 9001177W WO 9101831 A1 WO9101831 A1 WO 9101831A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sheet metal
- metal plates
- edges
- folding
- pieces
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
-
- 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
-
- 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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
- B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
Definitions
- the invention relates to a method for forming a plate, in particular from galvanized sheet metal, from a strip, in particular for the production of thin-walled duct elements. Furthermore, the invention relates to a device for carrying out such a method.
- the panels required for producing the duct elements are usually cut out of a strip which is pulled off a roll. Since, on the one hand, the channel elements generally have a length of more than two meters and, on the other hand, the commercially available coils made of galvanized sheet metal have a significantly smaller width, there is generally a considerable drop when the panels are cut out of the strip. Even if this waste is collected, the costs of collecting, sorting and storing are also increased considerably.
- the invention has for its object to improve a method of the type mentioned so that plates of any size with as little waste as possible if a tape of commercial width is used as the starting material. This object is achieved by a method having the features of claim 1. Devices for performing such a method are the subject of claims 4-17.
- the pieces can be soldered to one another or welded to one another. As a rule, however, it will be more advantageous to fold these pieces together.
- the new band can be produced fully automatically without any problems, because both the cutting off of the pieces from the first band and the joining of these pieces into the new band can be carried out fully automatically.
- the plates or sheets can also be cut off from the new strip in a fully automated manner.
- Figure 1 is a plan view of a schematically illustrated device for the production of sheets from a strip
- Figure 2 is a schematically shown side view of this device.
- FIG. 3 shows a partial side view of a device for connecting the edges of two sheet metal plates by folding
- Figure 4 is a sectional view of the device taken along line 4-4 in Figure 3;
- Figure 5 is an enlarged compared to Figure 3
- Figure 6 is a plan view of the folding head in
- FIG. 7 sectional views along the lines corresponding to up to 17 in FIG. 5.
- a device for forming plates from sheet metal, in particular galvanized sheet metal has a stand 101 in which at least one commercially available coil or coil 102, but preferably a plurality of coils with a horizontal axis, can be rotatably mounted. If the stand 101 can accommodate multiple coils, 101 coils can be provided with sheets of different widths and / or thickness in the stand.
- a pulling device which is designed in a known manner, pulls the strip 103 wound up here from the coil 102 and feeds it to a first pair of scissors 104.
- This first pair of scissors 104 is equipped with a device which makes it possible to automatically cut off pieces 105 of any desired length from the strip 103. The cut is always made at right angles to the lateral edges of the strip 103, so that the pieces 105 have a rectangular shape.
- Each of the cut pieces 105 comes to a first transport device 106, which transports the cut piece 105 at right angles to the transport device of the belt 103 to a folding machine 107 or other connecting machine.
- the transport device 105 is shown schematically in FIG. 2 as a roller conveyor. It feeds the pieces 105 to the folding machine 107 in such a way that the sides 105 'created by the cutting of the first scissors 104 are aligned with one another, as shown in FIG. 1.
- the folding machine 107 which will be described in detail later, has a folding device (not shown) which is moved back and forth on the rail 108 transversely to the direction in which the pieces 105 are transported, and the pieces 105 immediately following one another by a fold 109 to form a new volume 110.
- the width of this new belt 110 can be exactly that
- ISA / EP Requirements are adapted, since it is determined by the freely selectable length of the pieces 105, which can be adjusted on the first scissors 104.
- the new belt 110 is fed to a second pair of scissors 112 in the same direction in which the pieces 105 are fed to the folding machine 107.
- This second pair of scissors 112 automatically cuts sheets or plates 113 from the new band 110.
- the length of the plates 113 measured in the direction of transport can be chosen as desired.
- channel elements are bent from the plates 113 and closed by a further folding process in the initially still open longitudinal side.
- the length of these channel elements corresponds to the width of the new band 110, which is why these channel elements can be produced without the generation of waste.
- the folds formed by means of the folding machine 107 run in the longitudinal direction of these channel elements and therefore lead to the wall surfaces of the channel elements being stiffened in the desired manner.
- a device 1 for connecting the edges of two sheet metal plates by folding comprises a machine frame 2, which is only indicated schematically in the drawing, and on the top of which rectangular profile supports 3 have a bearing surface for two sheet metal plates 4 or 5 is formed. As can be seen from FIG.
- the support surface formed by the profile beams 3 consists of two sections which are separated by a space over the entire length of the machine frame.
- the free edges of the metal plates 4 and 5 protrude into this space in such a way that they overlap one another and at the same time are held at a mutual, vertical distance, cf. FIG. 4.
- gill means for example in the form of hydraulically lowerable clamping jaws 7, are provided on both sides of the intermediate space dividing the support surface, which are only indicated schematically in FIGS. 3 and 4 and with the help of which the sheet metal plates 4, 5 on the stop bar 6 and can be fixed on the support surface.
- FIG. 4 runs in the lower part of the machine frame, a relatively strong double T-beam 8, which is fixed to the machine frame 2 connected is.
- This carrier 8 extends over the entire length of the machine frame 2 and projects beyond it on one or both sides, as can be seen in FIG.
- a carriage 12 is displaceably guided in the longitudinal direction of the device 1 on the carrier 8 with the aid of rollers 9, 11.
- the carriage 12 is supported with the rollers 9 on the top of the carrier 8, while it is guided with the rollers 11 laterally on the central web 8 of this carrier.
- the carriage also carries an electric motor 15 which is connected to the pinion 14 via a conventional (not shown) gear (not shown).
- the pinion 14 is driven by the motor 15, the carriage 12 runs back and forth on the guide formed by the carrier 8.
- a folding head 16 (to be described later) is fixed, but exchangeable, to the top of the carriage 12.
- the folding head 16 When the folding head 16 is advanced with the carriage 12 in the direction of the arrow V (FIG. 3), the two free edges of the sheet metal plates 4, 5 are gripped by the folding head and gradually (in a manner still to be described) by a fold with each other connected.
- the folding head 16 When the folding head 16 has run past the entire length of the free edges of the sheet metal plates 4, 5, these can now be removed from the machine frame by plates connected by the fold, whereupon the carriage 12 with the folding head 16 by correspondingly reversing its drive can be returned to the starting position (shown in FIG. 3).
- the structure and operation of the folding head 16 are described below.
- the folding head 16 has an inlet end 17 and an outlet end 18 (FIG. 3). At the inlet end 17, the free edges of the sheet metal plates 4, 5 to be connected enter the folding head 16, at the outlet end 18 the edges of the sheet metal plates now joined by the fold emerge from the folding head 16 again.
- An upper pocket 21 and a lower pocket 22 for receiving the free edges of the sheet metal plates 4 and 5 are arranged at the inlet end of the folding head 17.
- the structure of these pockets 21, 22 is. best seen in Figure 7.
- the pockets are arranged at a mutual, vertical distance and overlap one another. They each comprise two plates 24 and 25, which are held at a mutual distance by a spacer 23, the plates 25 being angled downwards and upwards and thus forming outwardly widening insertion openings for the metal plates 4, 5, which follow one another open on opposite sides.
- the overlap area of the pockets 21, 22 on the folding head 16 can be adjusted appropriately.
- the edge edges of the sheet metal plates 4, 5 slide against the base of the pockets formed by the spacers 23.
- the pocket base and the edge edge run parallel to the feed direction V of the folding head 16.
- a plurality of preform rollers are rotatably arranged in pairs on the folding head 16, each of which holds the edge of a sheet metal plate 4 or 5 between them and deforms when the folding head 16 is fed.
- two pairs of preform rollers 31, 32, which are assigned to the sheet metal plates 4 and 5 are arranged on the relevant section of the folding head 16.
- the axes of rotation D of these pairs of rollers 31, 32 lie in horizontal planes, but they do not run perpendicular to the feed direction V, but rather at a small angle ⁇ * * • of, for example, 1 to 6, preferably 2 to 4 ° (FIG. 6) . With this small angle, the axes of rotation D of the pairs of preform rollers also run obliquely towards the bottom of the pockets 21, 22.
- the sheet metal plates 3, 4 Due to this oblique position of the axes of rotation D of the pairs of preforming rollers, the sheet metal plates 3, 4 receive a movement component towards the bottom of the pockets 21, 22 during the advance of the folding head 16 as soon as they are gripped by the rollers of the respective pairs, through which the edges of the Sheet metal plates are firmly attached to the bottom of the pockets so that the marginal edges assume a constant position which is essential for the formation of a firm and precise fold. Without such a movement component being issued, the edge edges could detach from the bottom of the pockets and thereby impair the quality of the fold formed.
- the profile of the pairs of preform rollers 31, 32 can be seen from FIGS. 8 and 9, respectively.
- the edge profile of the sheet metal plates 4, 5 generated by the relevant pairs of rollers is also shown, specifically outside the pairs of rollers for the sake of clarity.
- Correspondingly profiled form rollers engage in these guide tracks 35, 36, which adjoin the pairs of preform rollers 31, 32, so that the sheet metal plates 4, 5 are thereby held at a precisely defined, lateral distance relative to one another.
- FIGS. 5 and 6 also show, the pairs of preform rollers 31, 32 follow pairs of form rollers 37, 38, which are also rotatably mounted on the folding head 16 and whose profile can be seen in FIGS. 10 and 11, respectively.
- these figures also show the formation of these pairs of rollers 37, 38 with corresponding beads 39 or grooves 41, which come into positive engagement with the guide tracks 35, 36 of the sheet metal plates 4, 5 mentioned with reference to FIGS. S and 9, and position these sheet metal plates exactly as the folding head passes.
- FIGS. 10 and 11 also show the profile generated by the form roller pairs 37, 38 at the edges of the metal plates 4, 5.
- a further section 42 (FIGS. 5 and 6) adjoins the section of the folding head 16 which carries the roller pairs 31, 32, 37, 38 and contains guideways 43, 44 through which the sheet metal plates which are initially still held at a vertical distance from one another 4, 5 in the further advance run the folding head 16 are merged.
- FIGS. 12 and 13 show sectional views of these guideways at the beginning and end of this folding head section 42.
- the two sheet metal plates 4 and 5 still have the distance predetermined by the pockets 21, 22 and the pairs of form rollers 37, 38.
- the edges of the sheet metal plates 4, 5, on the other hand, are considerably closer to one another.
- guide members 45 and 46 which project with their free marginal edges into the guideways 43, 44, are also fixedly arranged on the folding head section 42.
- bent-over edge sections of the sheet metal plates 4, 5 are in sliding contact, so that the two sheet metal plates 4, 5 are thereby kept at a proper lateral distance from one another even when passing through section 42.
- a further section 47 adjoins the folding head section 42, which is shown in the respective cross-sectional view in FIGS. 12 to 15.
- the edges of the sheet metal plates 4, 5 brought together by the guide members 45, 46 in accordance with FIG. 13 reach profile grooves 48, 49 in the folding head section 47, in which the edges of the metal plates when the folding head 16 is advanced continue to be deformed and brought closer together.
- the deformation is not carried out with the help of rolling, but due to sliding folding elements ("sliding shoes").
- the shape and arrangement of the two deformed sheet metal plate edges is also shown in FIG. 14, namely for better clarity because of the outside of the profile grooves 48, 49.
- FIG. 15 shows the gradual change in shape of the profile grooves 48, 49, which takes place during the transition from FIG. 14 to FIG. 15. As well as the deformation and arrangement of the sheet metal edges now achieved.
- both pairs of form rollers 51, 52 are again arranged on the folding head section 47, the cross-sectional profiles of which are shown in FIGS. 16 and 17 together with the sheet metal edges which are now completely folded together.
- Both pairs of shaped rollers 51, 52 comprise a lower roller 53 with a circular cylindrical jacket, on which an upper roller 54 with two lateral beads 56, 57 enclosing the fold 55 rests.
- the fold 55 is finally pressed together between the rollers 53, 54, the previously formed and described above-described groove-shaped guide tracks 35, 36 being completely smoothed out again after a pre-smoothing in the profile grooves 48, 49 (see FIG. 15). has taken place.
- FIG. 4 it is assumed that the folding head 16 has already advanced so far from its starting position shown in FIG. 3 that the pockets 21, 22 at least partially in the space between the sheet-metal plate receiving surfaces above the double-T beam 8 lie so that the Both sheet metal plates 4, 5 can be pushed into the pockets 21, 22 from both sides before they are clamped with the clamping jaws 7, as a result of which they maintain their mutually overlapping position at a mutual vertical distance.
- a spreader device 60 is provided on the inlet side 17, which spreads the sheet metal plates 4, 5, which are initially arranged in the same plane on the support surface and already overlap with their edges, and automatically require them ⁇ lichen vertical distance when the folding head 16 is pushed from the starting position shown in Figure 3 in the feed direction V.
- the spreader device 60 comprises spreading members 61, 62 protruding from the inlet side 17 with inclined surfaces 63 and 64 directed obliquely towards the sheet metal plates 4, 5.
- the spreading members 61, 62 engage with their upward or downward sloping surfaces 63, 64 on the edges of the sheet metal plates 4, 5 already clamped on the receiving surface, whereby the edge of the sheet metal plate 4 from Spreader member 61 is raised and inserted into the pocket 21 and the edge of the sheet metal plate 5 is lowered by the spreader member 62 and inserted into the pocket 22.
- the folding head 16 is arranged on the carriage 12 in an exchangeable manner.
- the device can easily be adapted to other fold shapes, for example depending on different sheet thicknesses, can be converted by mounting the required folding head on the slide.
- the main advantage of the invention is that the sheet metal plates to be folded together remain exactly positioned during the folding process, which ultimately makes a first-class folding of the two sheet metal plates 4, 5 possible.
- the inclined axes of rotation of the pairs of preform rollers 31, 32 primarily ensure the exact positioning of the sheet metal plates, as a result of which a movement component directed toward the base of the pockets 21, 22 is impressed on the sheet metal plates from the start. If necessary, the axes of rotation of subsequent pairs of rollers, for. B. the roller pairs 37, 38, also run obliquely in the manner indicated.
- the sheet metal plates 4, 5 are clamped according to the invention in the region of their front edges perpendicular to the edges to be folded together on the stop strips 6 with the help of the gill means 7 and the fact that the folding head 16 runs away from this clamped front edge of the metal sheets 4, 5 during the formation of the fold 55.
- stresses towards the rear end of the sheet metal plates can possibly even out and a certain relative expansion of the sheet metal plates can take place, which likewise has a favorable effect on the folding quality.
- Such a favorable effect would not occur if the sheet metal plates were clamped at their rear edge and the folding head ran towards this clamped edge during the folding.
- the device with a leading folding head 16 is advantageous compared to a folding block held stationary on the machine frame because, in the case of sheet metal plates which are held stationary and the leading folding head, further sheet metal plates can be connected by folds without large return movements of the interconnected sheet metal plates.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP3925963.3 | 1989-08-05 | ||
DE19893925963 DE3925963C1 (en) | 1989-08-05 | 1989-08-05 | Galvanised sheet panels for thin wall ducting - are formed from identical lengths cut from strip and then joined into new strip from which panels are cut |
DE19904001963 DE4001963C1 (en) | 1990-01-24 | 1990-01-24 | Plate making system - has strips with sections of same length cut preferably from band and connected to each other along longitudinal sides |
DEP4001963.2 | 1990-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991001831A1 true WO1991001831A1 (de) | 1991-02-21 |
Family
ID=25883752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1990/001177 WO1991001831A1 (de) | 1989-08-05 | 1990-07-19 | Verfahren zur bildung einer platte aus einem band und vorrichtung zur durchführung des verfahrens |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0485445A1 (de) |
JP (1) | JPH04507219A (de) |
CA (1) | CA2063719A1 (de) |
WO (1) | WO1991001831A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT406939B (de) * | 1992-10-22 | 2000-10-25 | Peter Knoll | Vorrichtung zum profilieren von blechen |
ES2318919A1 (es) * | 2005-02-01 | 2009-05-01 | Jose Umbelco, S.L. | Tren de engatillado de bandas metalicas por sus bordes en forma continua. |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105436332B (zh) * | 2015-12-18 | 2018-11-20 | 森特士兴集团股份有限公司 | 一种水平链接缝锁缝机 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2695445A (en) * | 1950-07-20 | 1954-11-30 | Detroit Steel Products Co | Method of screening frames by a continuous process using screening rolls |
GB1073056A (en) * | 1964-04-17 | 1967-06-21 | Bahco Ab | Method of making rectangular drums of sheet material |
DE2257325B2 (de) * | 1971-12-09 | 1976-03-18 | AB Svenska Fläktfabriken, Nacka (Schweden) | Verfahren zum kontinuierlichen verbinden der kanten von zwei flaechenelementen aus duennem material sowie vorrichtung zur durchfuehrung des verfahrens |
DE2321623B2 (de) * | 1973-04-28 | 1979-05-03 | Fasti-Werk Carl Aug. Fastenrath, 5632 Wermelskirchen | Anlage zum Quer- und Längsteilen von Blechen |
-
1990
- 1990-07-19 EP EP19900911664 patent/EP0485445A1/de not_active Withdrawn
- 1990-07-19 CA CA 2063719 patent/CA2063719A1/en not_active Abandoned
- 1990-07-19 WO PCT/EP1990/001177 patent/WO1991001831A1/de not_active Application Discontinuation
- 1990-07-19 JP JP51084490A patent/JPH04507219A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2695445A (en) * | 1950-07-20 | 1954-11-30 | Detroit Steel Products Co | Method of screening frames by a continuous process using screening rolls |
GB1073056A (en) * | 1964-04-17 | 1967-06-21 | Bahco Ab | Method of making rectangular drums of sheet material |
DE2257325B2 (de) * | 1971-12-09 | 1976-03-18 | AB Svenska Fläktfabriken, Nacka (Schweden) | Verfahren zum kontinuierlichen verbinden der kanten von zwei flaechenelementen aus duennem material sowie vorrichtung zur durchfuehrung des verfahrens |
DE2321623B2 (de) * | 1973-04-28 | 1979-05-03 | Fasti-Werk Carl Aug. Fastenrath, 5632 Wermelskirchen | Anlage zum Quer- und Längsteilen von Blechen |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT406939B (de) * | 1992-10-22 | 2000-10-25 | Peter Knoll | Vorrichtung zum profilieren von blechen |
ES2318919A1 (es) * | 2005-02-01 | 2009-05-01 | Jose Umbelco, S.L. | Tren de engatillado de bandas metalicas por sus bordes en forma continua. |
Also Published As
Publication number | Publication date |
---|---|
CA2063719A1 (en) | 1991-07-25 |
EP0485445A1 (de) | 1992-05-20 |
JPH04507219A (ja) | 1992-12-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AT390432B (de) | Verfahren zur herstellung eines abstandhalterrahmens und vorrichtung sowie anlage zur durchfuehrung des verfahrens | |
EP1125653B1 (de) | Profilieranlage mit einer Profiliermaschine und mit einer Schweissvorrichtung | |
AT403350B (de) | Biegemaschine zum herstellen eines abstandhaltenden innenrahmens für eine isolierglasscheibe | |
DE2905841A1 (de) | Verfahren und vorrichtung zur herstellung von verbundplatten, insbesondere verbundglasscheiben | |
DE69102000T2 (de) | Rohr und Verfahren zur Herstellung. | |
DE2825903C3 (de) | Vorrichtung zum Ineinanderfalten von mehreren Bahnen | |
DE2423279A1 (de) | Aus plattenmaterial durch praegen geformte gegenstaende | |
DE1690760B1 (de) | Vorrichtung zum maschinellen Herstellen von Wabentraegern | |
EP2177285B1 (de) | Vorrichtung zum Rollformen von Blech | |
DE10226517C1 (de) | Verfahren und Vorrichtung zum Herstellen eines Hohlprofils | |
WO1991001831A1 (de) | Verfahren zur bildung einer platte aus einem band und vorrichtung zur durchführung des verfahrens | |
DE4403339A1 (de) | Vorrichtung zur Endformbearbeitung eines durch Elektro-Widerstandsschweißung erzeugten Rohres | |
DE2336233A1 (de) | Verfahren und vorrichtung zur herstellung von metallstangen mit gezahnten kanten | |
DE1565740B2 (de) | Vorrichtung fuer die kontinuierliche herstellung leichtgewichtiger zusammengesetzter metallischer i-traeger mittels einer elektrischen widerstands-nahtschweisseinrichtung | |
DE2455902C3 (de) | Verfahren zur Herstellung von Tübbing- bzw. Tunnelausbausegmenten und Einrichtungen zur Durchführung des Verfahrens | |
DE2451469A1 (de) | Verfahren und vorrichtung zum falten von bogen aus papier oder dergleichen | |
DE4001963C1 (en) | Plate making system - has strips with sections of same length cut preferably from band and connected to each other along longitudinal sides | |
DE2163731C3 (de) | ||
DE19721654A1 (de) | Verfahren und Vorrichtung zum Biegen von Profilen auf mehreren Biegestationen | |
DE3530513C2 (de) | ||
EP0565129B1 (de) | Herstellung eines Torblattes | |
DE2604681A1 (de) | Verfahren und vorrichtung zur herstellung von hohlprofilen | |
AT406846B (de) | Herstellung von profilstücken | |
DE1602404C (de) | Verfahren und Vorrichtung zum Herstellen von Rohrblechplatten mit gleichen Rohrverlaufmustern | |
DE2346703C3 (de) | Vorrichtung für die Bearbeitung von Plattenheizkörpern |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1990911664 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2063719 Country of ref document: CA |
|
WWP | Wipo information: published in national office |
Ref document number: 1990911664 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1990911664 Country of ref document: EP |