SE465257B

SE465257B - Bending method

Info

Publication number: SE465257B
Application number: SE8904019A
Authority: SE
Inventors: J I Wilkens
Original assignee: Ecophon Ab
Priority date: 1989-11-28
Filing date: 1989-11-28
Publication date: 1991-08-19
Also published as: SE8904019L; SE8904019D0

Abstract

A method for converting a straight flanged metal profile, preferably of T-shape or L-shape and intended for use as a ceiling fixture, into such a state that it is easy to bend to the desired concave and/or convex shape. The profile flange which upon bending is subjected to the greatest change in length is folded by plastic deformation in the transverse direction along its length, while the rest of the profile is held stationary. Each fold 14 is produced over the greater part of the width of the profile flange 12, as seen from its outer edge. <IMAGE>

Description

465 257 10 15 20 25 30 35 40 enda figur, som visar ett ändparti av en enligt det nya för- farandet framställd metallprofil i perspektivvy. 465 257 10 15 20 25 30 35 40 single figure, which shows an end portion of a metal profile produced according to the new method in perspective view.

Den pá ritningen visade och i överensstämmelse med förfarandet enligt uppfinningen framställda metallprofilen 10 utgörs i föreliggande fall av en T-profil av aluminium. Pro- filen är avsedd att vid ett senare tillfälle bockas utmed längden i det plan, som anges med en dubbelpil, dvs. i den uppàtriktade flänsens 12 plan. Profilflänsen 12 eller livet är utmed huvuddelen av sin bredd veckat, så att dess kontur erhållit en längdökning av cirka 8% i förhållande till sin fràn början raka form.The metal profile 10 shown in the drawing and produced in accordance with the method according to the invention in the present case consists of a T-profile of aluminum. The profile is intended to be bent at a later time along the length of the plane, which is indicated by a double arrow, ie. in the plane of the upwardly directed flange 12. The profile flange 12 or the waist is folded along the main part of its width, so that its contour has obtained a length increase of about 8% in relation to its initially straight shape.

I föreliggande fall upptar varje veck 14 ungefär 90% av profilflänsens 12 bredd, räknat fran dess ytterkant.In the present case, each fold 14 occupies approximately 90% of the width of the profile flange 12, calculated from its outer edge.

Eftersom flänsen 12 från början var rak har den alltså genom förfarandet enligt uppfinningen förlängts avsevärt.Since the flange 12 was initially straight, it has thus been considerably elongated by the method according to the invention.

Detta innebär att metallprofilen 10 vid en böjning i avsedd riktning inte alls har så stort böjmotstànd, som den skulle ha haft utan veckning. Hàllfastheten är dock fullt tillräcklig för-att t ex bära upp ett undertak med konventionellt upphängningssystem. Vid en bockning kommer vecken 14 att sträckas ut, respektive komprimeras. Om metallprofilen sålunda bibringas konkav form sträcks flänsen 12 ut i varierande grad beroende pá krökningsradien. Den del av flänsen 12, som ligger längst bort fran basdelen 16, kommer att sträckas mest. Pa motsvarande sätt kommer flänsen 12 att komprimeras vid konvex bockning, så att den del, som ligger längst bort fràn basdelen 16, blir mest komprimerad vid en given krökningsradie.This means that the metal profile 10, when bent in the intended direction, does not have as great a bending resistance as it would have had without folding. However, the strength is fully sufficient to, for example, support a suspended ceiling with a conventional suspension system. During a bend, the folds 14 will be stretched or compressed. If the metal profile is thus given a concave shape, the flange 12 is stretched to varying degrees depending on the radius of curvature. The part of the flange 12 which is furthest from the base part 16 will be stretched the most. Correspondingly, the flange 12 will be compressed during convex bending, so that the part furthest from the base part 16 will be most compressed at a given radius of curvature.

Vid framställningen av den nya T-formade metallprofilen 10 utförs veckningen lämpligen mellan tva valsar i en konven- tionell sickmaskin (visas inte). Det är härvid nödvändigt att metallprofilen hålls rak i ett stationärt tillstànd och för detta ändamål används lämpliga mothàll, som pressar profilen mot ett plant underlag. Försiktighet bör vidtas vid vecknings- förfarandet, så att flänsmaterialet inte trasas sönder i direkt anslutning till den inre delen 18 av vecken 14 intill basdelen 16. Härvid bör hänsyn tas till godstjockleken hos flänsen 12 samt till veckningsdjupet, dvs. utsträckningen av varje veck 14 i den med basdelen 16 parallella riktningen.In the production of the new T-shaped metal profile 10, the folding is suitably performed between two rollers in a conventional bending machine (not shown). It is necessary here that the metal profile is kept straight in a stationary state and for this purpose suitable abutments are used, which press the profile against a flat surface. Care should be taken in the folding process, so that the flange material is not torn apart in direct connection with the inner part 18 of the folds 14 next to the base part 16. In this case, the wall thickness of the flange 12 and the folding depth, ie. the extent of each fold 14 in the direction parallel to the base portion 16.

Ett analogt förfarande används vid framställning av en L-formad metallprofil eller en profil av annat utseende. 465 257 För att den färdiga metallprofilen skall få större hall- fasthet kan det i vissa fall vara lämpligt att utelämna veck- ningen utmed vissa delar av flänslängden, vilka med säkerhet inte skall bockas i anslutning till användningsatället.An analogous method is used in the production of an L-shaped metal profile or a profile of a different appearance. 465 257 In order for the finished metal profile to have a greater hall strength, it may in some cases be appropriate to omit the folding along certain parts of the flange length, which must certainly not be bent in connection with the place of use.

Det kan vara värt att notera att metallprofilen efter veckning men före bockning kan lackeras med lämplig färg, som tal efterföljande bockning pá användningsstället utan att den därvid spricker eller flagnar av.It may be worth noting that the metal profile after folding but before bending can be painted with a suitable color, such as subsequent bending at the place of use without it cracking or flaking off.

Claims

10 15 20 25 30 465 257 Patent claims

Method for bringing a straight flanged metal profile, preferably of T- or L-shape and intended for use in suspended ceiling mounting, in such a condition that it is easy to bend to the desired concave and / or convex 'é' shape, characterized in that the profile flange, which during bending will be subjected to the largest change in length, is folded in a transverse direction along its length by plastic deformation - each fold (14) being provided over the main part of the width of the profile flange (12) - below that the profile (10) is otherwise kept straight in the stationary state.

Method according to claim 1, characterized in that the metal profile is bent in direct connection with its place of use.

Method according to Claim 1 or 2, characterized in that the length of the contour of the profile flange (12) is increased by 5-10% through folding.

4. A method according to claim 3, characterized in that the length is increased by 8%.

Method according to one of Claims 1 to 4, characterized in that the profile flange (12) is provided with a sinusoidal fold.

Method according to one of Claims 1 to 5, characterized in the length of the flange (12). that the folding is carried out along the entire profile

A method according to any one of claims 1-6, characterized in that 80% of the width of the profile flange (12), calculated from its free edge. that each fold (14) is provided over at least

Method according to claim 7, characterized in that the folding is achieved over at least 90% of the width.