EP3590617B1 - Method for manufacturing a support profile comprising a sheet and support profile manufactured using this process - Google Patents
Method for manufacturing a support profile comprising a sheet and support profile manufactured using this process Download PDFInfo
- Publication number
- EP3590617B1 EP3590617B1 EP19183901.8A EP19183901A EP3590617B1 EP 3590617 B1 EP3590617 B1 EP 3590617B1 EP 19183901 A EP19183901 A EP 19183901A EP 3590617 B1 EP3590617 B1 EP 3590617B1
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- Prior art keywords
- seam
- edge
- longitudinal
- beam profile
- radius
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- 238000000034 method Methods 0.000 title claims description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002184 metal Substances 0.000 claims description 45
- 238000003466 welding Methods 0.000 claims description 43
- 238000005452 bending Methods 0.000 claims description 11
- 230000004927 fusion Effects 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000005253 cladding Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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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
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
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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
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
- B21D47/01—Making rigid structural elements or units, e.g. honeycomb structures beams or pillars
Definitions
- the invention relates to a method for producing a support profile from sheet metal, the sheet metal having a first longitudinal edge and a second longitudinal edge, the first longitudinal edge and the second longitudinal edge being parallel to one another.
- the present invention also provides a carrier profile which is produced by the method according to the invention, in particular according to one of the embodiments described above.
- the method comprises a step of bending, the sheet metal being bent into the shape of the carrier profile.
- the first longitudinal edge is bent into a first envelope with a first envelope edge and the second longitudinal edge is bent into a second envelope with a second envelope edge, the first envelope edge and the second envelope edge being in direct contact, with sheet metal being bent to form the carrier profile in such a way that the first and the second longitudinal edge lie within the carrier profile.
- the method further comprises a step of welding the first folded edge and the second folded edge to one another, the welding being formed by a step of high-frequency welding or by a step of fusion welding.
- a method for producing a support profile is from among others FR 2 865 667 A1 known. Processes of this type are used for the production of support profiles with integrated rails. However, the outwardly bent envelopes lead to an inhomogeneous outer surface with additional joints or edges, which make it difficult to use for carrier profiles with a precise surface fit. The welding consumables used for this process can also contribute to the unevenness of the outer surface, but reworking them can weaken the connection point and thus the strength of the support profile.
- a method according to the preamble of independent claim 1 is for example from DE69002760T2 known.
- the object of the present invention is to provide a method for producing a support profile from a sheet metal which has both high strength and high surface quality.
- independent claims 1 and 14 Accordingly, in a method according to the preamble of independent claim 1, there is an inventive solution to the object when the longitudinal edges are bent over by 180 ° so that the envelopes each on the later On the inside of the support profile, the longitudinal edges being bent in such a way that, after the sheet metal has been formed into the support profile and before the two cover edges have been welded, the end face facing the other edge, which runs orthogonally to the respective envelope and has a first radius into an outer side of the support profile, and with a second radius merges into the respective envelope, at least the first radius being smaller than the sheet thickness D of the sheet metal .
- the folded edges are welded to one another either by means of inductive high-frequency welding or fusion welding.
- a high-frequency (HF) welding process By using a high-frequency (HF) welding process, a particularly good connection between the two envelopes can be achieved, with the use of welding consumables being dispensed with.
- This process gives the weld seam a particularly high level of strength and enables its high stability without supporting the seam from the inside on the profile.
- the eddy currents generated by the induction coils also make it possible to limit the heat input to the edges to be welded.
- a fusion welding process such as a metal-active gas welding process or a carbon dioxide laser welding process can also be used.
- the inwardly bent envelopes also reinforce the stability of the support profile in the area around the weld, since the support profile is double-walled in this area. As a result, the moment of resistance and the geometrical moment of inertia of the support profile can be increased in this area without additional reinforcement elements having to be welded on in this area.
- the edge of the envelope forms the folded edge of the envelope. After the bend has taken place, and before the two folded edges are welded together, it forms the new outer edge of the respective longitudinal edge, so to speak.
- the sheet metal is preferably formed in a process for cold roll forming.
- the sheet metal is preferably a pure metal sheet without a plastic coating or the like. In any case, the base material of the sheet metal is worn away. More preferably, the sheet is a steel sheet.
- the carrier profile has a longitudinal side, the longitudinal side having an inner width, the weld running along the longitudinal side.
- the rigidity of the long side can be increased, whereby in particular one-sided loaded carrier profiles can be reinforced without increasing their external dimensions.
- the carrier profile has a first width of the first envelope perpendicular to the longitudinal extension of the carrier profile and a second width of the second envelope perpendicular to the longitudinal extension of the carrier profile, the first envelope over the first length and the second envelope over the second length rest against an inside of the support profile.
- the rigidity and the geometrical moment of inertia of the carrier profile can be increased further.
- the effect of the eddy currents and thus of the heat input on the edges to be welded can be improved by the high-frequency welding step through the electrical contact between the envelopes and the inside of the carrier profile.
- the first width and the second width are each at least twice the thickness of the sheet metal.
- the sum of the first width and the second width covers at least 50% of the inner width of the long side.
- the sum of the first width and the second width essentially completely covers the inner width of the longitudinal side.
- a particularly stressed side wall of the carrier profile can be additionally reinforced mechanically.
- the first longitudinal edge and the second longitudinal edge abut one another.
- at least a part of the carrier profile can be made double-walled, so that its cross-sectional values can be improved without the use of a greater thickness of the sheet metal used for production.
- at least a first cavity of the carrier profile can be doubled in its wall thickness.
- eddy currents flowing back on the inside of the support profile can cause the first longitudinal edge to be welded to the second longitudinal edge in addition to welding the edge of the first envelope to the edge of the second envelope.
- the first radius is less than half the sheet metal thickness D, more preferably less than 10% of the sheet thickness D, particularly preferably less than 2% of the sheet thickness, and very particularly preferably the first radius is so small that there is a sharp edge at this point.
- the second radius is preferably larger than the first radius and is preferably more than 30% of the sheet metal thickness D.
- a groove is rolled in the area of the later folded edge, in particular in the area of the first radius, the groove being made in the side of the sheet metal opposite the later first radius, and / or the longitudinal edge is made up to later cover edge thinned to a smaller thickness.
- the smaller thickness of the thinned longitudinal edge is preferably between 50% and 80% of the sheet metal thickness D.
- the end face between the first radius and the second radius is also preferably straight, so that the end faces of the two folded edges can be at least partially brought into flat contact during welding .
- this embodiment has the advantage that the longitudinal edges can be bent over by 180 ° with as little damage as possible. In addition, it is thereby possible to upset the edges of the fold with sharp edges before welding on the outer circumference and then to weld the edges of the fold without breaking.
- the production of the support profile includes an additional step of finishing the weld, for example by grinding or planing.
- the quality of the surface of the weld seam can be further improved, so that particularly high surface tolerances can be achieved.
- the folded edges are preferably pressed against one another in such a way that a weld seam is raised on the outside of the carrier profile, which is planed off immediately after welding while it is still hot in order to achieve a high surface quality.
- the elevation of the weld seam is preferably planed in the line at a distance of 500 mm to 700 mm from the weld point. A particularly economical production is thereby achieved.
- This embodiment also contributes to rapid production of the support profile.
- edges of the fold do not have to be so strongly compressed or upset during welding in order to achieve a clean weld seam, especially on the outside of the carrier profile, and a high surface quality after planing the weld seam. This also reduces the risk of cracking.
- the width of a weld seam formed by the welding is at least a single thickness of the sheet metal, but is at most three times the thickness of the sheet metal.
- the step of high-frequency welding further preferably comprises the use of an impedance core.
- a rod made of ferritic material is held in the area of the induction coil in the interior of the support profile, with the heat input being able to be concentrated further on the edges to be welded.
- the carrier profile 10 is formed from a sheet metal 12, in particular a sheet metal strip, the sheet metal 12 having a first envelope 4 bent by 180 ° with a first envelope edge 6 and a second envelope 5 bent by 180 ° with a second envelope edge 7.
- the sheet metal 12 is brought into the shape of the carrier profile 10, with the first folded edge 6 and the second folded edge 7 of the formed sheet metal 12 lying against one another .
- the area of the sheet metal 12 lying between the first folded edge 6 and the second folded edge 7 thus forms a cladding sheet 13 of the carrier profile 10.
- the envelopes 4 and 5 are bent inward in such a way that the first longitudinal edge 2 and the second longitudinal edge 3 within the carrier profile 10 lie.
- the bending and the means for its implementation are known and are not described in detail here.
- the forming preferably takes place in a process for cold roll forming.
- the carrier profile 10 encloses a first cavity 11 and a second cavity 17.
- the envelopes 4 and 5 are pressed firmly against the cladding sheet 13 of the carrier profile 10 by the 180 ° bending, so that the envelopes 4 and 5 form a double-walled area of the carrier profile 10 with the enveloping sheet 13.
- the first envelope 4 has a first width 14 and the second envelope 5 has a second width 15.
- the shape of the envelopes 4 and 5 is selected such that the contact point of the first envelope edge 6 and the second envelope edge 7 is in the middle of the longitudinal side 16.
- the sum of the first width 14 and the second width 15 essentially completely covers the inner width 9 of the longitudinal side 16.
- the carrier profile 10 is continuously guided through at least one induction coil through which alternating current flows, with a gap between the first folded edge 6 and the second folded edge 7 which, after passing through the induction coil, is caused by pressing the first folded edge 6 and the second folded edge 7 together is closed.
- the side surfaces 8 are each by a profile roller pressed together, so that the material of the folded edges 6 and 7 heated to a welding temperature is welded together to form a weld seam 1.
- the width of the weld 1 is approximately twice the thickness of the sheet metal 12, so that the envelope edges 6 and 7 are welded to one another over their entire thickness, but the envelopes 4 and 5 themselves are essentially not welded to the cladding sheet 13.
- the means for performing high-frequency welding are already known and will not be described in detail.
- the surface quality of the carrier profile is further improved by a subsequent step of mechanical reworking of the weld seam 1, in particular by a step of scraping or planing.
- the invention is not limited to the above embodiment, but rather to the scope of the claims.
- the sum of the first width 14 and the second width 15 can cover the entire inner circumference of the first cavity 11 so that the first longitudinal edge 2 and the second longitudinal edge 3 lie directly against one another.
- a groove 18 is preferably rolled in the area of the later folded edge in order to facilitate further deformation and to reduce the risk of cracking.
- the longitudinal edge is thinned to a smaller thickness until the later edge of the envelope, as is the case Figure 3 shows.
- the smaller thickness is preferably between 50% and 80% of the original sheet metal thickness D of the sheet metal 12.
- the thinned edge area is then reshaped as shown in FIG Figure 4 is shown.
- the resulting edge 6 has an end face facing the other edge 7, which runs orthogonally to the respective envelope 4 and with a first radius R1 into an outside of the carrier profile , and with a second radius R2 merges into the envelope 4, the first radius R1 being significantly smaller than the sheet thickness D of the sheet metal and the second radius R2.
- the edge of the envelope is compressed in such a way that the first Radius R1 is particularly small and essentially forms a sharp edge.
- the end face facing the other folded edge runs essentially straight between the first radius R1 and the second radius R2, so that the two folded edges can be at least partially brought into flat contact during welding, which makes the welding process much easier and a relatively low contact pressure during welding requires. This can reduce the risk of cracks.
- FIG. 5 shows, when welding on the outer circumference, a certain weld seam elevation 19 arises, which is also desired, since this weld seam elevation 19, like Figure 6 shows, in a planing step immediately following the welding process, planing can be carried out while still hot in order to achieve particularly high dimensional accuracy and surface quality.
- a certain elevation 20 also arises on the inner circumference, but due to the relatively large second radius R2, it does not protrude beyond the surface of the two envelopes 4 and 5 directed into the interior of the carrier profile.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Laser Beam Processing (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Trägerprofils aus einem Blech, wobei das Blech einen ersten Längsrand und einen zweiten Längsrand aufweist, wobei der erste Längsrand und der zweite Längsrand parallel zueinander sind. Die vorliegende Erfindung stellt auch ein Trägerprofil bereit, welches durch das erfindungsgemäße Verfahren, insbesondere nach einem der vorstehend beschriebenen Ausführungsformen, hergestellt ist.The invention relates to a method for producing a support profile from sheet metal, the sheet metal having a first longitudinal edge and a second longitudinal edge, the first longitudinal edge and the second longitudinal edge being parallel to one another. The present invention also provides a carrier profile which is produced by the method according to the invention, in particular according to one of the embodiments described above.
Das Verfahren umfasst dabei einen Schritt des Biegens, wobei das Blech in die Form des Trägerprofils gebogen wird. Dabei wird der erste Längsrand zu einem ersten Umschlag mit einer ersten Umschlagkante und der zweite Längsrand zu einem zweiten Umschlag mit einer zweiten Umschlagkante gebogen, wobei die erste Umschlagkante und die zweite Umschlagkante in direktem Kontakt stehen, wobei Blech derart zu dem Trägerprofil gebogen wird, dass der erste und der zweite Längsrand innerhalb des Trägerprofils liegen.The method comprises a step of bending, the sheet metal being bent into the shape of the carrier profile. The first longitudinal edge is bent into a first envelope with a first envelope edge and the second longitudinal edge is bent into a second envelope with a second envelope edge, the first envelope edge and the second envelope edge being in direct contact, with sheet metal being bent to form the carrier profile in such a way that the first and the second longitudinal edge lie within the carrier profile.
Das Verfahren umfasst ferner einen Schritt des Verschweißens der ersten Umschlagkante und der zweiten Umschlagkante miteinander, wobei das Verschweißen durch einen Schritt des Hochfrequenzschweißens oder durch einen Schritt des Schmelzschweißens gebildet wird.The method further comprises a step of welding the first folded edge and the second folded edge to one another, the welding being formed by a step of high-frequency welding or by a step of fusion welding.
Ein Verfahren zur Herstellung eines Trägerprofils ist unter anderem aus
Weitere Verfahren zur Herstellung von Trägerprofilen sind aus der
Ein Verfahren nach dem Oberbegriff des unabhängigen Anspruchs 1 ist beispielsweise aus der
Gegenstand der vorliegenden Erfindung ist die Bereitstellung eines Verfahrens zur Herstellung eines Trägerprofils aus einem Blech, welches sowohl eine hohe Festigkeit als auch eine hohe Oberflächengüte aufweist.The object of the present invention is to provide a method for producing a support profile from a sheet metal which has both high strength and high surface quality.
Die Aufgabe wird gelöst durch die Merkmale der unabhängigen Ansprüche 1 und 14. Demnach liegt bei einem Verfahren gemäß dem Oberbegriff des unabhängigen Anspruchs 1 dann eine erfindungsgemäße Lösung der Aufgabe vor, wenn die Längsränder um 180° umgebogen werden, sodass die Umschläge jeweils an der späteren Innenseite des Trägerprofils anliegen, wobei die Längsränder derart umgebogen werden, dass die Umschlagkante, nach Umformen des Blechs zu dem Trägerprofil und vor dem Verschweißen der beiden Umschlagkanten, eine der jeweils anderen Umschlagkante zugewandte Stirnseite aufweist, die orthogonal zu dem jeweiligen Umschlag verläuft und mit einem ersten Radius in eine Außenseite des Trägerprofils, und mit einem zweiten Radius in den jeweiligen Umschlag übergeht, wobei zumindest der erste Radius kleiner ist als die Bleckdicke D des Blechs..The object is achieved by the features of
Die Umschlagkanten werden entweder mittels induktivem Hochfrequenzschweißen oder Schmelzschweißen miteinander verschweißt. Durch die Verwendung eines Hochfrequenz-(HF)-Schweißverfahrens kann eine besonders gute Verbindung zwischen den beiden Umschlägen erreicht werden, wobei auf die Verwendung von Schweißzusätzen verzichtet wird. Dieses Verfahren verleiht der Schweißnaht eine besonders hohe Festigkeit, und ermöglicht deren hohe Stabilität ohne die Naht von innen am Profil abzustützen. Die durch die Induktionsspulen erzeugten Wirbelströme ermöglichen es zudem, den Wärmeeintrag auf die zu verschweißenden Kanten zu beschränken.The folded edges are welded to one another either by means of inductive high-frequency welding or fusion welding. By using a high-frequency (HF) welding process, a particularly good connection between the two envelopes can be achieved, with the use of welding consumables being dispensed with. This process gives the weld seam a particularly high level of strength and enables its high stability without supporting the seam from the inside on the profile. The eddy currents generated by the induction coils also make it possible to limit the heat input to the edges to be welded.
Alternativ zu einem HF-Schweißverfahren kann auch ein Schmelzschweißverfahren wie zum Beispiel ein Metall-Aktivgas-Schweißverfahren oder ein Kohlenstoffdioxidlaser-Schweißverfahren genutzt werden.As an alternative to an HF welding process, a fusion welding process such as a metal-active gas welding process or a carbon dioxide laser welding process can also be used.
Durch die nach innen gebogenen Umschläge wird außerdem die Stabilität des Trägerprofils im Bereich um die Verschweißung weiter verstärkt, da das Trägerprofil in diesem Bereich doppelwandig ausgeführt ist. Dadurch können das Widerstandsmoment und das Flächenträgheitsmoment des Trägerprofils in diesem Bereich erhöht werden, ohne dass zusätzliche Verstärkungselemente in diesem Bereich angeschweißt werden müssen. Die Umschlagkante bildet die Falzkante des Umschlags. Sie bildet nach erfolgter Umbiegung, und bevor die beiden Umschlagkanten miteinander verschweißt werden, sozusagen die neue Außenkante des jeweiligen Längsrandes.The inwardly bent envelopes also reinforce the stability of the support profile in the area around the weld, since the support profile is double-walled in this area. As a result, the moment of resistance and the geometrical moment of inertia of the support profile can be increased in this area without additional reinforcement elements having to be welded on in this area. The edge of the envelope forms the folded edge of the envelope. After the bend has taken place, and before the two folded edges are welded together, it forms the new outer edge of the respective longitudinal edge, so to speak.
Zusammen mit dem HF-Schweißverfahren kann durch das Nachinnenbiegen der Umschläge eine besonders hohe Oberflächengüte erreicht werden, sodass Trägerprofile, welche durch einem erfindungsgemäßen Verfahren hergestellt wurden, als Präzisionsprofile einsetzbar sind.Together with the HF welding process, by bending the envelopes inward, a particularly high surface quality can be achieved, so that carrier profiles which have been produced by a process according to the invention can be used as precision profiles.
Vorzugsweise findet die Umformung des Blechs in einem Verfahren zum Kaltwalzprofilieren statt.The sheet metal is preferably formed in a process for cold roll forming.
Bei dem Blech handelt es sich vorzugsweise um ein reines Metallblech ohne Kunststoffbeschichtung oder dergleichen. Verscheißt wird jedenfalls das Grundmaterial des Blechs. Weiter vorzugsweise handelt es sich bei dem Blech um ein Stahlblech.The sheet metal is preferably a pure metal sheet without a plastic coating or the like. In any case, the base material of the sheet metal is worn away. More preferably, the sheet is a steel sheet.
Vorteilhafte Ausführungsformen der vorliegenden Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the present invention are the subject of the subclaims.
Gemäß einer besonders bevorzugten Ausführungsform der vorliegenden Erfindung weist das Trägerprofil eine Längsseite auf, wobei die Längsseite eine Innenbreite aufweist, wobei die Verschweißung entlang der Längsseite verläuft. Durch das Umbiegen der Umschläge nach Innen kann die Steifigkeit der Längsseite erhöht werden, wodurch insbesondere einseitig belastete Trägerprofile verstärkt werden können, ohne dessen äußere Abmessungen zu vergrößern.According to a particularly preferred embodiment of the present invention, the carrier profile has a longitudinal side, the longitudinal side having an inner width, the weld running along the longitudinal side. By bending the folds inwards, the rigidity of the long side can be increased, whereby in particular one-sided loaded carrier profiles can be reinforced without increasing their external dimensions.
Gemäß einer weiteren besonders bevorzugten Ausführungsform der vorliegenden Erfindung weist das Trägerprofil eine erste Breite des ersten Umschlags senkrecht zur Längserstreckung des Trägerprofils und eine zweite Breite des zweiten Umschlags senkrecht zur Längserstreckung des Trägerprofils auf, wobei der erste Umschlag über die erste Länge und der zweite Umschlag über die zweite Länge an einer Innenseite des Trägerprofils anliegen. Dadurch können die Steifigkeit und das Flächenträgheitsmoment des Trägerprofils weiter gesteigert werden. Insbesondere kann durch den elektrischen Kontakt zwischen den Umschlägen und der Innenseite des Trägerprofils die Wirkung der Wirbelströme und damit des Wärmeeintrags auf die zu verschweißenden Kanten durch den Schritt des Hochfrequenzschweißens verbessert werden.According to a further particularly preferred embodiment of the present invention, the carrier profile has a first width of the first envelope perpendicular to the longitudinal extension of the carrier profile and a second width of the second envelope perpendicular to the longitudinal extension of the carrier profile, the first envelope over the first length and the second envelope over the second length rest against an inside of the support profile. As a result, the rigidity and the geometrical moment of inertia of the carrier profile can be increased further. In particular, the effect of the eddy currents and thus of the heat input on the edges to be welded can be improved by the high-frequency welding step through the electrical contact between the envelopes and the inside of the carrier profile.
Gemäß einer weiteren Ausführungsform der vorliegenden Erfindung betragen die erste Breite und die zweite Breite jeweils zumindest das Doppelte der Dicke des Blechs. Dadurch kann insbesondere der unmittelbar an die Schweißnaht angrenzende Bereich des Trägerprofils verstärkt werden.According to a further embodiment of the present invention, the first width and the second width are each at least twice the thickness of the sheet metal. As a result, in particular the region of the carrier profile directly adjacent to the weld seam can be reinforced.
Gemäß einer alternativen Ausführungsform der vorliegenden Erfindung überdeckt die Summe der ersten Breite und der zweiten Breite zumindest 50% der Innenbreite der Längsseite.According to an alternative embodiment of the present invention, the sum of the first width and the second width covers at least 50% of the inner width of the long side.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung überdeckt die Summe der ersten Breite und der zweiten Breite die Innenbreite der Längsseite im Wesentlichen vollständig. Dadurch kann eine besonders beanspruchte Seitenwand des Trägerprofils mechanisch zusätzlich verstärkt werden.According to a further preferred embodiment of the present invention, the sum of the first width and the second width essentially completely covers the inner width of the longitudinal side. As a result, a particularly stressed side wall of the carrier profile can be additionally reinforced mechanically.
Gemäß einer weiteren Ausführungsform der vorliegenden Erfindung stoßen der erste Längsrand und der zweite Längsrand aneinander. Dadurch kann zumindest ein Teil des Trägerprofils doppelwandig ausgeführt werden, sodass dessen Querschnittswerte ohne die Verwendung einer höheren Dicke des zur Herstellung verwendeten Blechs verbessert werden können. Insbesondere bei einseitig belasteten Trägerprofilen kann zumindest ein erster Hohlraum des Trägerprofils in seiner Wandstärke verdoppelt werden. Des Weiteren kann durch auf der Innenseite des Trägerprofils rückfließende Wirbelströme zusätzlich zur Verschweißung der Kante des ersten Umschlags mit der Kante des zweiten Umschlags eine Verschweißung des ersten Längsrands mit dem zweiten Längsrand hervorgerufen werden.According to a further embodiment of the present invention, the first longitudinal edge and the second longitudinal edge abut one another. As a result, at least a part of the carrier profile can be made double-walled, so that its cross-sectional values can be improved without the use of a greater thickness of the sheet metal used for production. In particular in the case of carrier profiles that are loaded on one side, at least a first cavity of the carrier profile can be doubled in its wall thickness. Furthermore, eddy currents flowing back on the inside of the support profile can cause the first longitudinal edge to be welded to the second longitudinal edge in addition to welding the edge of the first envelope to the edge of the second envelope.
Gemäß einer weiteren besonders bevorzugten Ausführungsform der vorliegenden Erfindung ist der erste Radius kleiner als die Hälfte der Blechdicke D, weiter bevorzugt kleiner als 10% der Blechdicke D, besonders bevorzugt kleiner als 2% der Blechdicke, und ganz besonders bevorzugt ist der erste Radius so klein, dass an dieser Stelle eine scharfe Kante besteht. Der zweite Radius ist dabei vorzugsweise größer als der erste Radius und beträgt vorzugsweise mehr als 30% der Blechdicke D. Um eine derartige Geometrie mit einem besonders kleinen ersten Radius zu erreichen und die Längsränder mit möglichst geringer Schädigung um 180° umbiegen zu können, wird in das Blech vor oder während des Umbiegens der Längsränder eine Rille im Bereich der späteren Umschlagkante, insbesondere im Bereich des ersten Radius, eingewalzt, wobei die Rille in die dem späteren ersten Radius gegenüberliegende Seite des Blechs eingebracht wird, und/oder der Längsrand wird bis zur späteren Umschlagkante auf eine geringere Dicke ausgedünnt. Die geringere Dicke des ausgedünnten Längsrandes beträgt vorzugsweise zwischen 50% und 80% der Blechdicke D. Weiter vorzugsweise verläuft die Stirnseite zwischen dem ersten Radius und dem zweiten Radius gerade, so dass die Stirnseiten der beiden Umschlagkanten beim Verschweißen zumindest teilweise flächig in Kontakt gebracht werden können.According to a further particularly preferred embodiment of the present invention, the first radius is less than half the sheet metal thickness D, more preferably less than 10% of the sheet thickness D, particularly preferably less than 2% of the sheet thickness, and very particularly preferably the first radius is so small that there is a sharp edge at this point. The second radius is preferably larger than the first radius and is preferably more than 30% of the sheet metal thickness D. In order to achieve such a geometry with a particularly small first radius and to be able to bend the longitudinal edges by 180 ° with the least possible damage, in the sheet metal before or during the bending of the longitudinal edges a groove is rolled in the area of the later folded edge, in particular in the area of the first radius, the groove being made in the side of the sheet metal opposite the later first radius, and / or the longitudinal edge is made up to later cover edge thinned to a smaller thickness. The smaller thickness of the thinned longitudinal edge is preferably between 50% and 80% of the sheet metal thickness D. The end face between the first radius and the second radius is also preferably straight, so that the end faces of the two folded edges can be at least partially brought into flat contact during welding .
Diese Ausführungsform hat wie oben bereits erwähnt den Vorteil, dass die Längsränder mit möglichst geringer Schädigung um 180° umgebogen werden können. Zudem ist es dadurch möglich, die Umschlagkanten vor dem Verschweißen am Außenumfang scharfkantig zu stauchen und die Umschlagkanten anschließend bruchfrei zu verschweißen.As already mentioned above, this embodiment has the advantage that the longitudinal edges can be bent over by 180 ° with as little damage as possible. In addition, it is thereby possible to upset the edges of the fold with sharp edges before welding on the outer circumference and then to weld the edges of the fold without breaking.
Gemäß einer weiteren Ausführungsform der vorliegenden Erfindung umfasst die Herstellung des Trägerprofils einen zusätzlichen Schritt des Nachbearbeitens der Verschweißung, beispielsweise durch Schleifen oder Hobeln. Dadurch kann die Qualität der Oberfläche der Schweißnaht weiter verbessert werden, sodass besonders hohe Oberflächentoleranzen erreicht werden können. Die Umschlagkanten werden beim Verschweißen vorzugsweise derart aufeinander gepresst, dass an der Außenseite des Trägerprofils eine Schweißnahtüberhöhung entsteht, die unmittelbar nach dem Verschweißen im noch heißen Zustand abgehobelt wird, um eine hohe Oberflächenqualität zu erreichen. Das Abhobeln der Schweißnahtüberhöhung erfolgt bevorzugt in der Linie in einem Abstand von 500 mm bis 700 mm zum Schweißpunkt. Dadurch wird eine besonders wirtschaftliche Fertigung erreicht. Diese Ausführungsform trägt außerdem zu einer schnellen Fertigung des Trägerprofils bei. Durch das oben beschriebene Stauchen der Umschlagkanten vor dem Schweißvorgang müssen die Umschlagkanten beim Verschweißen nicht so stark zusammengepresst bzw. gestaucht werden, um insbesondere auf der Außenseite des Trägerprofils eine saubere Schweißnaht sowie, nach Abhobeln der Schweißnahtüberhöhung, eine hohe Oberflächengüte zu erreichen. Dadurch wird auch die Rissgefahr verringert.According to a further embodiment of the present invention, the production of the support profile includes an additional step of finishing the weld, for example by grinding or planing. As a result, the quality of the surface of the weld seam can be further improved, so that particularly high surface tolerances can be achieved. During welding, the folded edges are preferably pressed against one another in such a way that a weld seam is raised on the outside of the carrier profile, which is planed off immediately after welding while it is still hot in order to achieve a high surface quality. The elevation of the weld seam is preferably planed in the line at a distance of 500 mm to 700 mm from the weld point. A particularly economical production is thereby achieved. This embodiment also contributes to rapid production of the support profile. Due to the above-described upsetting of the edges of the fold before the welding process, the edges of the fold do not have to be so strongly compressed or upset during welding in order to achieve a clean weld seam, especially on the outside of the carrier profile, and a high surface quality after planing the weld seam. This also reduces the risk of cracking.
Gemäß einer weiteren bevorzugten Ausführungsform der vorliegenden Erfindung beträgt die Breite einer durch das Verschweißen gebildeten Schweißnaht zumindest das Einfache einer Dicke des Blechs, beträgt jedoch höchstens das Dreifache einer Dicke des Blechs.According to a further preferred embodiment of the present invention, the width of a weld seam formed by the welding is at least a single thickness of the sheet metal, but is at most three times the thickness of the sheet metal.
Weiter vorzugsweise umfasst der Schritt des Hochfrequenzschweißens die Verwendung eines Impederkerns. Insbesondere wird ein Stab aus ferritischem Material im Bereich der Induktionsspule im inneren des Trägerprofils gehalten, wobei der Wärmeeintrag weiter auf die zu verschweißenden Kanten konzentriert werden kann.The step of high-frequency welding further preferably comprises the use of an impedance core. In particular, a rod made of ferritic material is held in the area of the induction coil in the interior of the support profile, with the heat input being able to be concentrated further on the edges to be welded.
Ausführungsbeispiele der vorliegenden Erfindung werden im Folgenden anhand von Zeichnungen näher erläutert.Embodiments of the present invention are explained in more detail below with reference to drawings.
Es zeigen:
- Figur 1:
- einen Querschnitt eines durch ein erfindungsgemäßes Verfahren
hergestellten Trägerprofils 10, - Figur 2:
- eine Detailansicht eines der beiden Längsränder im Querschnitt vor dem Umbiegen mit einer eingewalzten Rille,
- Figur 3:
- die
Detailansicht aus Figur 2 mit einem ausgedünnten Randbereich anstatt einer eingewalzten Rille, - Figur 4:
- die
Detailansicht aus Figur 3 nach dem Umbiegen des Längsrands, - Figur 5:
- die
Detailansicht aus Figur 4 nach dem Verscheißen der Umschlagkanten, und - Figur 6:
- die
Detailansicht aus Figur 5 nach dem Abhobeln der Schweißnahtüberhöhung.
- Figure 1:
- a cross section of a
carrier profile 10 produced by a method according to the invention, - Figure 2:
- a detailed view of one of the two longitudinal edges in cross section before bending with a rolled-in groove,
- Figure 3:
- the detailed view
Figure 2 with a thinned edge area instead of a rolled-in groove, - Figure 4:
- the detailed view
Figure 3 after bending the long edge, - Figure 5:
- the detailed view
Figure 4 after the cover edges have been scoured, and - Figure 6:
- the detailed view
Figure 5 after planing off the weld seam elevation.
Das Trägerprofil 10 wird aus einem Blech 12, insbesondere einem Blechstreifen geformt, wobei das Blech 12 einen ersten um 180° gebogenen Umschlag 4 mit einer ersten Umschlagkante 6 und einen zweiten um 180° gebogenen Umschlag 5 mit einer zweiten Umschlagkante 7 aufweist. Durch Biegen parallel zur Längserstreckung des Blechs 12, und somit parallel zum ersten Längsrand 2 und dem zweiten Längsrand 3, wird das Blech 12 in die Form des Trägerprofils 10 gebracht, wobei die erste Umschlagkante 6 und die zweite Umschlagkante 7 des geformten Blechs 12 aneinander liegen. Der zwischen der ersten Umschlagkante 6 und der zweiten Umschlagkante 7 liegende Bereich des Blechs 12 bildet somit ein Hüllblech 13 des Trägerprofils 10. Die Umschläge 4 und 5 werden dabei derart nach innen gebogen, dass der erste Längsrand 2 und der zweite Längsrand 3 innerhalb des Trägerprofils 10 liegen. Das Biegen und die Mittel zu dessen Durchführung sind bekannt und werden hier nicht näher beschrieben. Vorzugsweise findet die Umformung in einem Verfahren zum Kaltwalzprofilieren statt.The
Das Trägerprofil 10 umschließt dabei einen ersten Hohlraum 11 und einen zweiten Hohlraum 17.The
Die Umschläge 4 und 5 sind durch das 180°-Biegen fest an das Hüllblech 13 des Trägerprofils 10 gepresst, sodass die Umschläge 4 und 5 mit dem Hüllblech 13 einen doppelwandigen Bereich des Trägerprofils 10 bilden. Dabei weißt der erste Umschlag 4 eine erste Breite 14 und der zweite Umschlag 5 eine zweite Breite 15 auf.The
Die Form der Umschläge 4 und 5 ist dabei derart gewählt, dass der Berührpunkt der ersten Umschlagkante 6 und der zweiten Umschlagkante 7 in der Mitte der Längsseite 16 liegt. Dabei überdeckt die Summe der ersten Breite 14 und der zweiten Breite 15 die Innenbreite 9 der Längsseite 16 im Wesentlichen vollständig.The shape of the
Im Schritt des Verschweißens wird das Trägerprofil 10 kontinuierlich durch zumindest eine mit Wechselstrom durchflossene Induktionsspule geführt, wobei zwischen der ersten Umschlagkante 6 und der zweiten Umschlagkante 7 ein Spalt vorliegt, welcher nach Durchgang durch die Induktionsspule durch Aneinanderpressen der ersten Umschlagkante 6 und der zweiten Umschlagkante 7 geschlossen wird. Dabei werden die Seitenflächen 8 durch je eine Profilrolle zusammengepresst, sodass das auf eine Schweißtemperatur erhitzte Material der Umschlagkanten 6 und 7 zu einer Schweißnaht 1 zusammengeschweißt wird. Die Breite der Schweißnaht 1 beträgt dabei in etwa das Doppelte der Dicke des Blechs 12, sodass die Umschlagkanten 6 und 7 über ihre gesamte Dicke miteinander verschweißt sind, die Umschläge 4 und 5 selbst jedoch im Wesentlichen nicht mit dem Hüllblech 13 verschweißt sind. Die Mittel zur Durchführung des Hochfrequenzschweißens sind bereits bekannt und werden nicht näher beschrieben.In the welding step, the
Durch die Verwendung eines Impederkerns, welcher im vom Trägerprofil 10 umschlossenen ersten Hohlraum 11 gehalten wird, wird ein Rückfließen der Wirbelströme in den Umschlägen 4 und 5 reduziert, wobei der Wärmeeintrag in den Umschlagkanten 6 und 7 verbessert wird, und eine besonders gute Verschweißung erreicht wird.By using an impedance core, which is held in the
Durch einen anschließenden Schritt einer mechanischen Nachbearbeitung der Schweißnaht 1, insbesondere durch einen Schritt des Schabens oder Hobelns, wird die Oberflächenqualität des Trägerprofils weiter verbessert.The surface quality of the carrier profile is further improved by a subsequent step of mechanical reworking of the
Der Fachmann wird erkennen, dass die Erfindung nicht auf die obige Ausführungsform beschränkt ist, sondern auf den Umfang der Ansprüche. Zusätzlich zu der Innenbreite 9 der Längsseite 16 kann die Summe der ersten Breite 14 und der zweiten Breite 15 den gesamten Innenumfang des ersten Hohlraums 11 überdecken, sodass der erste Längsrand 2 und der zweite Längsrand 3 direkt aneinanderliegen.Those skilled in the art will recognize that the invention is not limited to the above embodiment, but rather to the scope of the claims. In addition to the
Wie
Wie
Claims (14)
- A method for manufacturing a beam profile (10) from a metal sheet (12), the metal sheet (12) having a first longitudinal edge (2) and a second longitudinal edge (3), wherein the first longitudinal edge (2) and the second longitudinal edge (3) are parallel to each other, the method comprising:a. bending the metal sheet (12) to the beam profile (10), wherein the first longitudinal edge (2) is bent to a first seam (4) with a first seam edge (6) and the second longitudinal edge (3) is bent to a second seam (5) with a second seam edge (7), wherein the first seam edge (6) and the second seam edge (7) are in direct contact with each other;b. welding the first seam edge (6) and the second seam edge (7) together,wherein the metal sheet (12) is bent to the beam profile (10) in such a way that the first (2) and second (3) longitudinal edges are located within the beam profile (10), the welding being performed by means of a step of high-frequency welding or by a step of fusion welding,
characterised in that the longitudinal edges (2, 3) are folded by 180° so that the seams (4, 5) each abut against a side which is to become the inner side of the beam profile (10), the longitudinal edges (2, 3) being folded in such a way that the seam edge (6, 7), after forming the metal sheet (12) to the beam profile and before welding the two seam edges (6, 7) together, has an end face opposite the respective other seam edge (6, 7) which extends orthogonally to the respective seam (4, 5) and merges into an outer surface of the beam profile with a first radius R1 and into the respective seam (4, 5) with a second radius R2, wherein at least the first radius R1 is smaller than the sheet thickness D of the metal sheet (12). - The method according to claim 1, characterized in that the beam profile (10) has a longitudinal side (16), wherein the longitudinal side (16) has an inner width (9), and wherein the weld (1) extends along the longitudinal side (16).
- The method according to claim 1 or 2, characterised in that the beam profile (10) has a first width (14) of the first seam (4) perpendicular to the longitudinal extension of the beam profile and a second width (15) of the second seam (5) perpendicular to the longitudinal extension of the beam profile (10), wherein the first seam (4) and the second seam (5) abut against an inner side of the beam profile (10) over the first length (14) and over the second length (15), respectively.
- The method according to claim 3, characterized in that the first width (14) and the second width (15) are each at least twice the thickness of the metal sheet (10).
- The method according to claims 2 and 3, characterized in that the sum of the first width (14) and the second width (15) covers at least 50 % of the inner width (9) of the longitudinal side (16).
- The method according to claims 2 and 3, characterized in that the sum of the first width (14) and the second width (15) covers substantially the entire inner width (9) of the longitudinal side (16).
- The method according to claim 7, characterized in that the first radius R1 is smaller than half the sheet thickness D, particularly preferably smaller than 10 % of the sheet thickness D.
- The method according to claim 7 or 8, characterized in that the second radius R2 is larger than the first radius R1 and is preferably more than 30 % of the sheet thickness D.
- The method according to one of claims 7 to 9, characterised in that a groove (18) is rolled into the metal sheet (12) before or during the folding of the longitudinal edges (2, 3) in the region of the seam edge (6, 7) to be formed, in particular in the region of the first radius R1, and/or the longitudinal edge (2, 3) is thinned to a smaller thickness up to the seam edge (5, 6) to be formed.
- The method according to claim 10, characterized in that the reduced thickness of the thinned longitudinal edge is between 50 % and 80 % of the sheet thickness D.
- The method according to one of claims 7 to 11, characterised in that the end face extends linearly between the first radius R1 and the second radius R2, so that the end faces of the two seam edges (6, 7) can be brought at least partially in surface contact during welding.
- The method according to one of claims 1 to 12, characterised in that the seam edges (6, 7) are pressed together during welding so that a weld reinforcement (19) is produced on the outside of the beam profile (10) that is planed off immediately after welding while still warm.
- The method according to claim 13, characterised in that planing off the weld reinforcement (19) is carried out in the line at a distance of 500 mm to 700 mm from the welding point.
- A beam profile (10) made from a metal sheet (12), the metal sheet (12) having a first longitudinal edge (2) and a second longitudinal edge (3), wherein the first longitudinal edge (2) and the second longitudinal edge (3) are parallel to each other, the metal sheet (12) being bent to the beam profile (10), wherein the first longitudinal edge (2) is bent to a first seam (4) with a first seam edge (6) and the second longitudinal edge (3) is bent to a second seam (5) with a second seam edge (7), wherein the first seam edge (6) and the second seam edge (7) are in direct contact with each other and the first seam edge (6) and the second seam edge (7) are welded together,
wherein the first seam (4) and the second seam (5) are bent in such a way that the first (2) and second (3) longitudinal edges are located within the beam profile (10), wherein the first (6) and the second (7) seam edge are high-frequency welded,
characterised in that the longitudinal edges (2, 3) are folded by 180° so that the seams (4, 5) each abut against a side which is to become the inner side of the beam profile (10), the longitudinal edges (2, 3) being folded in such a way that the seam edge (6, 7), after forming the sheet (12) to the beam profile and before welding the two seam edges (6, 7) together, has an end face opposite the respective other seam edge (6, 7) which extends orthogonally to the respective seam (4, 5) and merges into an outer surface of the beam profile with a first radius R1, and into the respective seam (4, 5) with a second radius R2, at least the first radius R1 being smaller than the sheet thickness D of the metal sheet (12), wherein the beam profile (10) is in particular produced by means of a method according to any of claims 1 to 14.
Applications Claiming Priority (1)
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DE102018115974.9A DE102018115974B4 (en) | 2018-07-02 | 2018-07-02 | Process for producing a carrier profile from a sheet and carrier profile produced by the method |
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EP3590617A1 EP3590617A1 (en) | 2020-01-08 |
EP3590617B1 true EP3590617B1 (en) | 2021-01-20 |
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EP19183901.8A Active EP3590617B1 (en) | 2018-07-02 | 2019-07-02 | Method for manufacturing a support profile comprising a sheet and support profile manufactured using this process |
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EP (1) | EP3590617B1 (en) |
DE (1) | DE102018115974B4 (en) |
DK (1) | DK3590617T3 (en) |
ES (1) | ES2861056T3 (en) |
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DE2031812A1 (en) * | 1970-06-26 | 1971-12-30 | IG-Glas Spezialvertrieb GmbH, 8059 Moosinning | Spacer for an insulating glass unit |
CN1035077C (en) * | 1988-07-25 | 1997-06-04 | 管科技有限公司 | Structural member with welded hollow end sections and process for forming same |
SE462787B (en) * | 1989-01-03 | 1990-09-03 | Ortic Ab | MANUFACTURED MANUFACTURING AFFAIRS OF COATED STEEL BANDS |
DE4030335C2 (en) * | 1990-09-25 | 1998-05-20 | Lingemann Helmut Gmbh & Co | Hollow rung profile for insulating glazing and method for its production |
DE4442434C1 (en) * | 1994-11-29 | 1995-10-05 | Welser Ohg Josef | Method for mfr. of rolled hollow plate profiles |
JP2002168576A (en) * | 2000-12-06 | 2002-06-14 | Showa Denko Kk | Heat exchanging tube and its manufacturing method |
FR2865667A1 (en) * | 2004-01-29 | 2005-08-05 | Clerc Ind | Metal unit manufacturing method, involves longitudinally bending and/or folding metal strip to form perform in which C-shaped profile is formed by lateral parts that are connected to tubular part by free bends joined by weld ridge |
DE102008051894A1 (en) * | 2008-10-16 | 2010-05-06 | Behr Gmbh & Co. Kg | Metal load-adapted structural part for a heat exchanger, method for producing a load-adapted structural part, heat exchangers |
GB2486671A (en) * | 2010-12-22 | 2012-06-27 | Denso Marston Ltd | A Heat Exchanger, a Tube for a Heat Exchanger, a Method of making a tube for a Heat Exchanger and a Method of Making a Heat Exchanger |
-
2018
- 2018-07-02 DE DE102018115974.9A patent/DE102018115974B4/en not_active Expired - Fee Related
-
2019
- 2019-07-02 EP EP19183901.8A patent/EP3590617B1/en active Active
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EP3590617A1 (en) | 2020-01-08 |
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