FR2730433A1

FR2730433A1 - Sheet metal bending tool and procedure

Info

Publication number: FR2730433A1
Application number: FR9501904A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-02-14
Filing date: 1995-02-14
Publication date: 1996-08-14

Abstract

The tool, esp. for bending lengthwise ribs in metal sheets 1.5-2.5 m wide, consists of a frame (1) some 1 m high and twice the width of the metal sheets. The frame contains the fold pressing mechanism wit a die (4) and matrix (4), the matrix being raised vertically by a power cylinder to press the sheet metal against the die. The tool can also be used to join two sheets, by clipping their edges together. The ribs are formed by applying the matrix to the underside of the metal sheet (15) while the die is rotated above it.

Description

MEMOIRE DESCRIPT@F I1 est connu de realiser des plieuses qui fonctionnent ci 2 etapes successives avec un deplacement vertical pour emboutir une premier serie de plis puis une rotation de 2 presseurs articules qui @aconnent une 2 eme serie de plis
Les 2 phases peuvent s'enchainer automat iquement si (iii it i I i se une came qui au debut du deplacement vertical empeche la rotation permettant ensuite grace a une forme appropriee la rotation des presseurs il est difficile d' eviter un deplacement vertical descendant au mometit ou rommence la rotation les plis de la 2 eme phase n' etant plus alors bien formes
On evite cette difficulte en remplacant la cane par un ressort
Par ailleurs les plieuses classiques comportent un col de cygne obligeant a retourner la tole pour pratiquer un pli sur 1' autre bord
Pour pratiquer une serie de plis sur une tole de 1,5 m de largueur il Eaut remplacer le col de cygne par un cadre de 3 m de largueur . La plieise etant fixce au milieu du cadre il est possible de realiser une serie de plis dans la largueur de la tole par simple deplacement transversal de cette derniete
Avec un tel cadre il est possible de simplifier le guidage de la matrice pendant le deolacement vertical .Il est en effet possible de la releir aux montants du cadre par un tirant de 1.5 m de largueur Dour un cadre de 3 m le deplacement vertical etant faible par rapport a la largueur de l!S n le deplacement de la matrice au cours du levage sera de quelques millimetres absirbe par les ieux de construction
Le dessin ioint explicite ces innovat itins
Le cadre est represente sous le repere (1 ) u
Le poinconrepere (2) est fixe sur le cadre , Il peut par exemple etre realise a partir d' un tube place sur la diagonale et complete par 2 fers U a anale vif repere (3) t
Ce poincon principal est complete eventuellement par 2 profiles repere (14) qui permettront comme represente sur la figure 2 de faire un pli supplementaire par la rotation du presseur repere (4) repere
La matr ice comporte un profile principal repere (9 ) represente comme un fer 1 et comportant 2 articulations repere (5) sur lesquelles sont ixes les presseurs repere (4 ) Ces derniers sont representes a titre d' exemple sur la figure 2 exprimes par des hachures sous forme de 2 tubes superposes completes par un fer plat repere (13)La rotation du presseur provoquera le formage d' un pli supplementaire grace a i appui de la tole sur le poincon annexe repere( 1)
La figure 2 est une vue partielle a plus grande echelle de la figure I ou sont representes la cadre repere (I) ,le poincon repere (2) avec ses complements en fer U ou tube repere (3), la matrice repere (4) et son profile repere (9)
La matrice est soulevee verticalement en premiere phase par l' action du verin repere (1 ) sur elquel prennent appuis 2 bielles repere (6) articules entre elles au point de contact avec le verin et d' autre part sir la partie mobile de la matrice repere (4)
Pour assurer le guidage au cours du levage 2 tirants reperd (7) relient le profile repere (9) au cadre repere (1)
De plus pour eviter la torsion du profile repere (9) il est prevu lateralement au cadre un profile repere (11) fixe sur le profile repere (9 ) et coulissant entre 2 guides repere (12) fixes sur le cadre repere (I)
De meme pour assurer le guidage de la cette du verin il est prevu 2 tirants repere (8) qui la relie au acdre
Pour eviter une rotation des presseurs avant que le profil renere (9 ) n' ait
pris contact avec le poincon re@ere (2) on dispose de ressor@s re@ere @@@
empechant cette rotation prematuree
Les points d' attache de ces ressorts seront determirles de fac on a
ce queleur rection sur la matrice articulez passe en dessous de l' articulation
en position basse de la matrice et au dessus de cette articulation en position haute
pour aider alors la rotation de la matrice Au contraire les bielles seront disposees de facon a ce < îie en en position basse
l' axe de la bie@@e passe legerement a cote de l' articulation pour amorcer
la rotation de ces derniers en position haute
Sur la figure 3 est represente un exemple de formage obtenu en rive des toles qui permet d' assembler 2 toles ci' en ippalit les nervures de rive
Il faut pour cela qu'une des nervures soit legerement plus grande que l' autre
Ce resultat sera facilement atteint en utilisant un plat repere (16) d'une largueur
superieure a la distance des angles des fers repere (3) qui de finissent la
largueur du meplatpartie basse de la nervure lorsque le plat est situe au dessous
de la tole repere (15)
En placant ce plat repere (16) au dessus de la tole avant gormage on augmente a la
fois la largueur du meDlat de la tole repere ( 15) et la longueur des 2 flancs
a 450 sur la figure 3 MEMORY DESCRIPT @ F I1 is known to make folding machines which work in 2 successive stages with a vertical displacement to stamp a first series of folds then a rotation of 2 articulated pressers which @aconnaise a 2 nd series of folds
The 2 phases can be linked automatically if (iii it i I i se a cam which at the beginning of the vertical displacement prevents rotation allowing then thanks to an appropriate form the rotation of the pressers it is difficult to avoid a vertical displacement descending to mometit or resumes rotation the folds of the 2nd phase no longer being well formed
We avoid this difficulty by replacing the cane with a spring
In addition, the classic folding machines have a swan neck that requires the sheet to be turned over to make a fold on the other edge.
To practice a series of folds on a sheet 1.5 m wide it is necessary to replace the swan neck with a frame 3 m wide. The fold being fixed in the middle of the frame it is possible to make a series of folds in the width of the sheet by simple transverse displacement of the latter
With such a frame it is possible to simplify the guiding of the matrix during the vertical deolacement. It is indeed possible to re-read it to the uprights of the frame by a tie of 1.5 m in width For a frame of 3 m the vertical displacement being small compared to the width of l! S n the displacement of the matrix during the lifting will be of a few millimeters absorbed by the construction eyes
The drawing explains these itinerant innovations
The frame is represented under the mark (1) u
The punch (2) is fixed on the frame, It can for example be made from a tube placed on the diagonal and completed by 2 irons U with a sharp anal marked (3) t
This main punch is possibly completed by 2 marked profiles (14) which will, as shown in FIG. 2, make an additional fold by the rotation of the pressed presser (4) marked
The master has a main profile marked (9) represented as an iron 1 and comprising 2 articulated markings (5) on which are fixed the pressers marked (4) These are represented by way of example in FIG. 2 expressed by hatching in the form of 2 superimposed tubes completed by a flat iron marked (13) The rotation of the presser will cause the formation of an additional fold thanks to the support of the sheet on the annexed punch marked (1)
Figure 2 is a partial view on a larger scale of Figure I where are represented the frame marked (I), the punch marked (2) with its iron fittings U or tube marked (3), the matrix marked (4) and its marked profile (9)
The matrix is lifted vertically in the first phase by the action of the identified jack (1) on which are supported 2 marked connecting rods (6) articulated together at the point of contact with the jack and on the other hand on the mobile part of the matrix landmark (4)
To provide guidance during lifting, 2 reperd tie rods (7) connect the marked profile (9) to the marked frame (1)
In addition to avoid twisting of the marked profile (9) there is provided laterally to the frame a marked profile (11) fixed on the marked profile (9) and sliding between 2 marked guides (12) fixed on the marked frame (I)
Likewise to ensure the guiding of this cylinder, it is provided with 2 tie rods (8) which connects it to the acre
To avoid rotation of the pressers before the re-profile (9) has
contacted the re @ ere punch (2) we have re @ ere re @ ere @@@
preventing this premature rotation
The attachment points of these springs will be determined so that
what their rection on the articulated matrix passes below the articulation
in the low position of the matrix and above this articulation in the high position
to help then the rotation of the matrix On the contrary the connecting rods will be arranged so that in the lower position
the axis of the bie @@ e passes slightly next to the joint to initiate
the rotation of these in high position
In Figure 3 is shown an example of forming obtained on the edge of the sheets which allows to assemble 2 sheets ci 'in ippalit the ribs of edge
One of the ribs must be slightly larger than the other.
This result will be easily achieved using a flat marker (16) of a width
greater than the distance from the angles of the irons marked (3) which end the
width of the lower flat part of the rib when the dish is located below
sheet metal (15)
By placing this reference plate (16) above the sheet before forming, we increase the
times the width of the metal plate of the marked plate (15) and the length of the 2 sides
a 450 in figure 3

Claims

CLAIMS 10

Device allowing the production of ribs parallel to the length of a sheet from 1.5 to 2.5 m in width, characterized by the use of a frame with a height of the order of a meter and a double width of that of the sheet metal, this frame being distributed at intermediate intervals of the order of 2.5 m on the bending tool for the ribs, the length of which is not limited 2)

Device according to claim I, characterized by the use of a combined lifting and folding machine, known rotation available in the frame axis and complemented by 2 profiles (14) fixed on the frame (1) and making it possible to produce an additional fold in end of rotation of the pressers 30)

Device according to previous claims characterized by the em'loi of tie rods connecting the matrix to the complete frame by urt guide (11) sliding between 2 dishes (I avoiding the twisting of the matrix 4) according to previous claims characterized by the use of a jack lifting (10) ensuring the lifting and then the rotation of the Dressers (3) oar 1 'connecting rods (6) articulated between them by flirting the bass and articulated on the pressers in the upper part @a head of the cylinder is fixed to @irants (8) 5)

Device according to claim 4 characterized by the use of springs è (13) preventing the rotation of the pressers before the first lifting phase is completed the profile (9) then bearing on the punch the fasteners of this spring being disodode so prevent rotation in the low position and help this rotation in the high position 6)

Device according to the preceding claims, characterized by the use of a flat iron (16) which places above the sheet (15) before forming atigmene the dimensions of the rib to allow the nesting on a neighboring rib 70)

Device according to claim 2, characterized by the use of a punch comprising

soda on a tube (2) 2 sharp angle U irons (3 @)