FR2823686A1 - Metal bar cold bending machine has roller with angled recess to allow square or rectangular-section bar to be bent across its angle - Google Patents

Abstract

The bar bending machine, comprising a plate (14) with a central spiral (17) to grip one end of the bar (19), and a lever (15) with a roller (16) to apply a pressure to the bar, has the roller made with an angled recess (26) enabling a bar of square or rectangular section to be bent by applying a pressure to one of its edges. The roller is in two assembled sections with flat and recessed surfaces, the recess (26) having two faces, each lying at an angle of 45 deg to the vertical. In a variant of the design the recess can be made in a shaping piece fitted between the roller and the bar.

Description

first and second stages (S120, S122).

  The present invention relates to an improved cold metal curler for working a metal bar on an edge or in the field or on a flat surface. This useful flight makes it possible in particular to bend the square or rectangular metal bars diagonally. That is to say in a direction which is not perpendicular to one side of their section, and in particular in a particular relevant case in a direction confused with the diagonal of their section, that is to 45 with respect to one side of the bar for a square bar. The voluteuse is intended for the general public of do-it-yourselfers and ironworkers of art who will be able thanks to the invention to develop new patterns while preserving the extent of the possibilities of the prior art. The worked metal bars are used in the realization of gates, grids, fences, window protection and indoor furniture and thanks to the invention will be able to adopt shapes in three dimensions which give a portal relief effects up to then impractical. Indeed, previously the portals included arabesques or scrolls but which were circumscribed in the plane of the portal. The metal bars worked are of the soft rolled metal, copper, S aluminum, stainless steel type and of any type of section, square, rectangular, octagonal, round. There are many known metal cold volutators. These voluteurs only allow the metal to be bent on a field or on a flat surface, that is to say perpendicular to one side of the section of the metal bar. The principle of use of these voluteuses is simple: The bar rests on uli horizontal flat plate generally arranged at height of the basin of the user. A first end of the bar is wedged in a heart, which is a volute of first shape, arranged approximately on the axis of rotation of a lever arm. Initially, the metal bar can be bent up to 360 around this core by bending by means of a lever arm which the user actuates. The arm of the sink has a roller mounted on an axis, the roller is in pressure contact with the bar during bending, the lever arm is mounted pivoting around the axis of the plate, the first end of the bar being positioned substantially on the axis of the plate. In a second step, the bar is bent up to 360 around volutes of second shape that 3 o 1'user comes to position on the tray in continuity with the shape of the heart. In the prior art, the roller adopts a shape of a hollow cylinder and of a cylindrical and smooth outer surface, the scrolls also adopt a vertical and smooth flat outer surface. A first problem with this voluteuse is that it is only possible to bend the bar on chanp or flat, that is to say by placing one side of the bar on the tray 3 .; horizontal. Indeed, a metal bar, for example, of square section cannot rest on its edge since the bar under the effect of its gravity finds itself in an unstable position and comes to reposition itself in a stable position on one of these sides. It is even more impossible to bend it on edge since under the effect of the pressure of the bending, the bar then returns violently to resume a stable equilibrium position by positioning itself on o field. The voluers of the prior art can therefore only bend on a field or on a flat

  and cannot bend diagonally at the edge.

  The volutes of the prior art do not have an adjustable roller. Indeed, the prior art only proposes a roller which is a hollow cylinder with a smooth and cylindrical outer surface. This effectively limits the panoply of potential achievements made by the

the voluteuse with a simple pebble.

  The scrolls of the prior art do not furthermore have scrolls of adjustable first shape, which means that the user must have a set of scrolls of first shape in order to be able to make scrolls on bars of different shape first. The volutes of the prior art have a non-adjustable lever arm, which imposes on the user a limited number of lever arm positions which is then particularly stressed in effort during bending, the lever arm may be subjected deformations, and does not offer the user the optimal positions for bending with a

minimal effort.

  The volutes of the prior art use a lever arm which is weakened in its design since it is mounted in rotation about an axis. This axis must therefore support

  significant efforts and risk breaking.

  - The invention overcomes the faults of the prior art and proposes a voluteuse which works on edge or on field or on flat by bending the metal diagonally, a voluteuse which has a roller of adjustable form allowing to work different sections of metal in different conditions, a volute of first adjustable shape proposing different geometries of volutes of first shape, an adjustable lever arm allowing to minimize the efforts of the user and to minimize the mechanical stresses on the machine, a lever arm mounted in rotation on a crown so that

  bear more effort and not risk breaking.

  In one aspect of the invention, the shaped roller has a recess on its outer surface so as to be able to treat the metal bar diagonally, that is to say to allow to maintain the metal bar in a stable position according to a longitudinal angle determined along an edge on the plate. In an improved aspect of the invention, the recess rib in the shaped roller adopts a wedge shape in the format of a wedge

  of the metal bar in order to stabilize it as much as possible.

  > In one aspect of the invention, the scrolls are bored on their outer surface of a rib so as to keep the bar on edge during bending. In an improved aspect of the invention this rib has a wedge shape in the format of a wedge

  of the metal bar in order to stabilize it on the edge as much as possible.

  In one aspect of the invention, during bending, a fitting having on an external surface a recess in the form of a rib is disposed between the shaped roller and the bar. The bar is thus kept stable on the edge. In an improved aspect of the invention, this rib has the shape of a corner of the front bar, cone to

  keep the bar stable on edge during bending.

  In one aspect of the invention, the shaped roller is adjustable and reversible in a manner 3; to be able to adapt to all types of bar sections. It is composed of two parts, a first part provided with a rib and a second part sliding along the first part provided with a complementary rib. This shaped roller can thus adopt a series of rib shapes so as to be able to adapt to the standard sections of the various metal bar templates commonly proposed in the

4 cornmerce.

  In one aspect of the invention the roller is mounted free sliding and pivoting about an axis secured to the lever arm. This roller is used in a use of the voluteuse which becomes a volute rewinder. In this configuration, a circular or elliptical disc is secured to the plate, a first end of the bar 4; is wedged against this disc by means of a fixing device, it is wound by bending by means of the lever arm around this disc. The advantage of the free sliding roller is to be able to wind a bar around a closed volute, for example circular or elliptical, over at least two turns. In the case where the bar is wound on two turns the height of the sliding roller is at least less than twice the height of the axis on

which is mounted the roller.

  In one aspect of the invention, the first shape scroll is adjustable so as to be able to create several starts of different shapes. I1 consists of two half-hearts of S complementary forms. A first half-hole in which is inserted a first end of the metal bar and a second half-heart of a shape complementary to the first half heart and whose inner surface comes to match the first half-heart so that the outer surface of the two half-c_ur present gives form to a first volute of form. In an improved aspect of the invention, the adjustable core o has six adjustment positions at six equal progressive angles. Each position

  - determines an increasingly open outer surface of the spiral.

  In one aspect of the invention, the lever arm is mounted on a crown, the crown pivots in rotation around a support disc fixed on a base. This arrangement makes it possible to request much greater efforts than in the prior art where the lever arm of AS was mounted on a fixing rod which was pivotally mounted around an axis, all the effort being transferred to the axis which was of the order of 22 mm, while according to the invention all the force is distributed by the crown on the support disc whose diameter is of size

  much greater than 22 mm, in the order in certain embodiments of 220 mm.

  In one aspect of the invention, the lever arm is adjustable in rotation relative to the crown so as to be able to offer the user several geometric configurations which can determine the attack distance to the metal bar in order to play on the moment exerted on the bar during bending. In one aspect of the invention, the

  arm has six adjustment positions.

  In one aspect of the invention, the user can obtain a curved bar in relief by bending the bar at a first end on a flat surface or on a field, then by bending its other end on an edge. In the case of a square bar, and a shaped roller having a wedge-shaped rib having an angle of 45 with the vertical, the bar obtained will present after bending according to this process a general shape of two

  circular scrolls in two planes with an angle of 45 between them.

  o We will now refer to the figures in which:

  Figure 1 shows a sectional view of the voluter.

  Figure 2 shows a perspective view from above of the bending machine bending a bar 3 Figure 3 shows a side view of a bending of bar on edge according to a first embodiment Figure 4a shows a side view of a bar bending on edge according to a second embodiment Figure 4b shows a view from another side of a piece of form used in the

  o carrying out the bending according to the second embodiment in FIG. 4a.

  Figure S shows a side view of a bar bending on an edge according to a third embodiment Figures 6a, 6b show a sectional view from above of the first element of the adjustable roller, Figure 6c , 6d represent a sectional and top view of the second element of the gal and of adjustable shape Figures 6 e, 6f represent a sectional view of the gal and of adjustable shape assembled

in two different positions.

  Figure 6g shows a sectional view of another variant of the shaped roller according to a

  variant adapting to a wrapping function of the present invention.

  Figure 7 shows a perspective view of a bar bending on a field in a

  particular configuration of the roller with adjustable and reversible shape.

  FIG. 8a, 8b represent a perspective view from above and from the side of the first element of a volute of first form. FIGS. 8c, 8d represent a top and side view of the second element of a complementary volute of first form. 8e shows a perspective view of a volute of adjustable first form and assembled o In Figure 1 is shown the volute 1 according to the invention which consists of a base 10, a foot 11 which can be of a height of about 1 meter so as to establish a working height at the height of the pelvis of a man of average height. The foot 11 is secured to the base 10 which rests on the ground. On the upper face of the foot 11 is secured an attachment support 12 of cylindrical outer surface and whose upper surface is of a diameter greater than the upper surface of the foot 11. Around the attachment support 12 is mounted a crown 13, the crown 13 is provided with a central bore with a diameter very slightly greater than that of the fixing support 12 and this in order to be able to be animated in rotation in the horizontal plane around its vertical axis of o symmetry around the fixing support 12. The crown 13 is provided with handles 13a on which can be embedded rotation arms which the user can actuate in its bending operations. On the upper face of the fixing support 12 is secured a plate 14. The plate 14 is pierced with a central passage 14a which serves as a fixing hole for the volutes of first form 17 on the plate 14. A lever arm 15 composed a lever arm support 15a and a ram arm 1 Sb is mounted on the crown 13 by the lever arm support lSa. In the horizontal plane, the angle at which the lever arm 1S is attached to the crown 13 is adjustable, thus offering the user a variety of choices for attacking the metal bar during bending. The ram arm 1 Sb is slidably mounted in translation relative to the lever arm support 15a, fg2, a rack 15c and its cover lSe make it possible to adjust the position of the ram arm lSb relative to the lever arm support lSa. On the end of the ram arm 15b is mounted an axis 15d which serves as an axis of rotation for the roller 16. The roller 16 works just above the plate 14 so as to be able to bend the bars which rest on one side or on a edge on this plate 14. A volute of first form 17 is solidarisoe at

  3; plate 14 on its upper face and is in this particular case in the center of plate 14.

  Figure 2 shows a perspective view from above, a bar 19 of which a user initiates bending on an edge. A first end l9a of the bar 19 is wedged in a volute of first shape 17. A roller of improved shape 16 and provided with a rib 26 is in contact with the bar and maintains it in a stable position on qo ridge on the plate 14. By actuating the lever arm 15 anticlockwise, the user will bend the bar around the first form volute 17. A

  locking key 18 wedges the bar in the first form volute 17.

  Figure 3 shows a side view of a bar bending on an edge according to a first embodiment. In this mode, the shaped roller 16a is a hollow cylinder provided at its center with a cylindrical bore 21. The roller is mounted to pivot in rotation about a cylindrical axis 22 secured to the lever arm 1 S. The lower surface 23 of the roller 16a is flush with the upper surface of the plate 14. The lateral external surface of the roller has a generally cylindrical shape but nevertheless comprising a recess 26 on its periphery on its lower part which in the present case takes the form of a rib in the form of corner of the bar 19. This wedge-shaped section rib has two perpendicular lateral surfaces and thus accommodate a first corner 28a of a metal bar 19 which in this embodiment has a square section. The metal bar 19 rests on the plate 14 on an edge 29 which is defined by the corner 28b adjacent to the corner 28a held in the recess 26 of the shaped roller 16a. The metal bar

  is curved around the volute of form 17.

  FIG. 4a represents a side view of a bending of bar on edge according to a second embodiment. In this embodiment, the shaped roller 16 adopts a known shape which is that of a hollow cylinder and of a planar and cylindrical lateral outer surface. A shaped part 41 is positioned by the user between the shaped roller - 16 the metal bar 19, which in this example is for example of rectangular section. The shaped part 41 has the general external shape of a rectangular parallelepiped. One of these lateral surfaces 42 is bored according to a recess 26a which in this example

  embodiment has the shape of a section rib having a wedge shape.

  According to this exemplary embodiment, the rib has two faces perpendicular to each other and this in order to adapt to a bar of square or rectangular section. For example in this exemplary embodiment, the corner has an angle of 30 relative to the vertical,

  which will allow the bar to be bent at an angle of 30 relative to the side of the bar.

  The bar 19 is curved around the volute of firm 17.

  Figure 4b shows a side view in a direction perpendicular to that of Figure 4a of the shaped part 41 which in this example adopts a general shape of

  parrallélipède hollowed out on one of its faces with a rib 26a.

  FIG. 5 represents a side view of a bar bending on an edge according to a third embodiment. In this embodiment, it is the scrolls 17a which 'have on their outer surface an obviously rib 26b so as to be able

  stabilize the bar 19 on edge during bending.

  Figures 6 e, 6f show a side view of the gal and of adjustable shape ab le and reversible 60, 61 composed of a first roller element 60 represented in FIG. 6a and 6b and of a second roller element 61 represented in figure 6c, 6d. The first roller element o 60 adopts a shape of hollow cylinder and outer surface having a first rib face and a second rib face. The second element of the roller 61 has a general shape of a hollow cylinder with an internal diameter equal to that of the external diameter of the first element of the roller 60. The second element of roller 61 therefore slides in translation around the first element of roller 60. The first element roller, fig 6a, fig 3 S 6b consists first of a hollow cylindrical cylinder 6ûa on its upper part, then in a cone section 60b of decreasing diameter on its adjoining part, then in a cone section of increasing diameter 60c on its lower part. The second roller element 61 has a lower part with a cylindrical external surface 61a, and a high part 61b with a conical external surface of decreasing diameter. The second roller element 61 comprises a fixing device for fixing it to the first roller element 60. This device consists of three holes 62a, 62b, 62c into which three screws can be inserted. Depending on the altitude at which the second roller element 61 is secured to the first roller element 60, the outer surface of the assembled roller has a rib 26d, FIG. F and 26e, FIG. E, of a particular type because it has a height particular and therefore adapting to S a bar section of a particular type. This rib is not strictly wedge-shaped, but has the two edges of a wedge. The assembly of the two roller elements, 61 therefore constitutes an adjustable roller. We can therefore clearly see in FIGS. 6e, 6f two positions for adjusting the roller of adjustable shape corresponding to two sections of

different bars.

  FIG. 6g represents a side view of a roller of shape 16c of a particular type since it corresponds to a roller of shape allow to bend by winding a bar around a volute of first shape 17. In this aspect of the invention, the roller 16c is mounted free sliding around the axis of the cylindrical axis 22 of the arm of the lever 15, it has an obviously stabilizing 26. The height of the roller 16c is less than at least at twice the height of the cylindrical axis 22 and this in order to be able to bend the bar over at least two closed turns. Thanks to this sliding free-form roller 16c, it therefore becomes possible to bend a bar of square section on a diagonal edge.

  or rectangular around a volute of first shape 17.

  o Figure 7 shows in perspective the adjustable roller 16 bending in - a particular arrangement or it bends a bar 19 on the flat, that is to say by being in contact with one side of the bar. To use the roller 16 in this configuration, the roller 16 must be turned 180 to 180 with respect to its arrangement shown in FIG. 6e, 6f so that it has on its lower part its smooth cylindrical section which is that of the first element of roller 60, the second roller element 61 then being in the middle of the axis. The bar is bent against this smooth cylindrical outer section of the first

roller element 60.

  FIGS. 8a, 8b show a side and top view of the first element 80 of a volute of first foil 17 which is constituted by a device for hooking 81 to the plate 14 which in this example is a threaded rod, d 'a support disc 82 which completes the drilling made in this plate 14, secured to the support disc is fixed a volute of shape 90 which has a bar end holding cavity 83 in which

  comes to lodge the end of the curved metal bars.

  FIGS. 8c, 8d represent a side and top view in perspective of the second element of a volute of first form 84. (: e second volute element of first form 84 comprises fixing lugs 85a, 85b on the plate 14 The second scroll element has a lateral inner surface 92 complementary to a part of the lateral external surface 93 of the first element of the volute of first shape 80, so as to be able to be embedded on a part of its periphery so that that the two 3 o assembled elements form a smooth and spiral-shaped outer surface. Depending on the position of assembly between the first volute element of first shape 80 and the second volute element of first shape 81, the outer volute surface of first shape adopts a particular external surface. It is understandable that one thus obtains a volute of adjustable first shape which can realize several patterns of 3; lute of first form according to the assembly position of the two parts. On the face

  8e is shown in perspective an example of assembly.

  The invention therefore relates to a metal bar cold scroller (19) comprising a plate (14), a scroll (17), a roller (16), a lever arm (15) o actuating the roller (16) which bends the bar (19) around the volute (17), characterized in that at least one of the parts in pressure contact with the metal bar (19) during bending has a stabilization recess (26) so as to ability to bend the bar

  (19) by keeping it on edge at a stable longitudinal angle during bending.

  The invention therefore also relates to a cold metal rod bender characterized in that the stabilizing recess (26) is a rib of cross section

wedge shape.

  1 The invention therefore also relates to a cold metal rod bender characterized in that the rib (26) has two faces which are each oriented at an angle of 45 with the vertical, this type of rib adapting in particular to bars of

metal (19) of square section.

  The invention therefore also relates to a metal bar cold roller (19), characterized in that it also comprises a shaped part (41) which is positioned between the shaped roller (16) and the metal bar (193 , the shaped part (41) has a stabilization recess (26) in order to keep the metal bar (19) stable according to a

  o longitudinal angle during bending.

  The invention therefore also relates to a cold metal rod curler according to claim I, characterized in that the shaped roller (16) has a stabilizing recess (26) adjustable so as to be able to adapt to several types of section. of different metal bar. The invention therefore also relates to a cold metal rod bending machine according to claim 5 characterized in that the shaped roller (16) consists of two parts, a first part (60) and a second part (61), the second part (61) slides on the first part (60), the first part (60) has a rib face (60d), the second part (61) has a second rib face (61b), so that that the assembly of the two parts forms a rib (26) which is adjustable according to the fixing position of the

  second piece on the first piece.

  The invention therefore also relates to a cold metal bar spiraling device, characterized in that in the direction of sliding the height of the second part (61) is less than the height of the first part (60) in order to leave a gap between the plate (14) and the second part (61) in certain fixing positions so that the metal bar (19) can be worked on the field or on the flat against the cylindrical lateral or external wall (60a) of the first part (60) , that is to say allowing in certain fixing positions that the same roller can work on field or on flat in a

  direction and on a diagonal edge in the rib if we turn the roller 180.

  The invention therefore also relates to a cold metal rod bender (19) 3> comprising a plate (14), a volute (17), a roller (16) mounted freely on an axis (15d) secured to an arm of lever characterized in that the scroll is of closed external shape and that the height of the roller (16) of shape is less than the height of the axis (lSd) so that the scroller can wind a bar around the scroll closed and the roller

  (16) can bend at different altitudes on the axis.

  The invention therefore also relates to a cold metal rod volute valve according to claim 1, characterized in that the volute (17) is a volute of first adjustable shape and composed of two complementary parts, a first part (80) solidarisce to the plate and a second part (84) having several fixing positions on the plate l, so that the two parts fixed on the plate have an outer lateral surface in the form of a spiral which is increasingly open depending on the fixing positions of

the second part (84).

  The invention therefore also relates to a method of cold volutage in relief of a rectangular or square metal bar (19) on an edge according to a first end (19a) and on a plate according to the other end (19b) characterized in that 'it includes at least the following steps S a. a first step of stabilization of a metal bar (19) on an edge on a plate (17) by inserting it into the recess (26) of a part in contact with this metal bar, a first end (19a ) of the bar (19) is slid into a volute of first shape (17) b. a second bending step while maintaining this part provided with a recess (26) in contact with the bar (19) under pressure in its obviously c. a third step of removing the bar (19), worked at a first end (19a), and to present its second end (19b) S 'on the plate d. a fourth step where the metal bar (19) is placed on a flat surface, the second end (19b) of the bar being slid into a volute of first shape (17) - e. a fifth step of bending the bar (19) according to its second end (19b) on a flat plate Rev en d ication s 1) Cold metal brazing device (19) comprising a plate (14), a volute (17), a roller (16), a lever arm (15) actuating the roller (16) which bends the bar (19) around the volute (17), characterized in that at least one of the parts in contact in pressure with the metal bar (19) during bending has a stabilization recess (26) so as to be able to bend the bar (19) while keeping it on edge in a

  stable longitudinal angle during bending.

  2) metal bar cold valve according to claim 1 characterized in that the stabilization recess (26) is a section rib

wedge-shaped.

  3) Metal bar cold valve according to claim 2 characterized in that the rib (26) has two faces which are each oriented at an angle of 45 with the vertical, this type of rib adapting

  in particular with metal bars (19) of square section.

  4) metal bar cold valve (19) according to claim 1 characterized in that it also comprises a shaped part (41) which is positioned between the shaped roller (16) and the metal bar (19) , the shaped part (41) has a stabilization recess (26) in order to keep the metal bar (19) stable at an angle

longitudinal during bending.

  Z 5 s) metal bar cold valve according to claim 1 characterized in that the shaped roller (16) has a stabilization recess (26) adjustable so as to be able to adapt to several types of cross section

different metal bar.

  o 6) metal bar cold valve according to claim 5 characterized in that the shaped roller (16) consists of two parts, a first part (60) and a second part (61), the second part (61 ) slides on the first part (60), the first part (60) has a rib face (60d), the second part (61) has a second rib face (61b), so that the assembly of the two pieces form a rib (26) which is adjustable according to the fixing position of the

  second piece on the first piece.

  7) Metal bar cold shutter according to claim 6 characterized in that in the direction of sliding the height of the second part (61) is less than the height of the first part (60) in order to leave a gap between the plate (14) and the second part (61) in certain fixing positions so that the metal bar (19) can be worked on the field or on a flat surface against the cylindrical external side wall (60a) of the first part (60), that is to say allowing in certain fixing positions that the same roller can work on field or on flat in one direction and on diagonal edge in the rib

if we turn the roller 180.

  8) Metal bar cold valve (19) comprising a plate (14), a volute (17), a roller (16) mounted freely on an axis (15d) secured to a lever arm characterized in that the volute is of external form fermoe o and that the height of the roller (16) of form is less than the height of the axis (lSd) so that the voluteuse can wrap a bar around the closed volute and that the roller ( 16) can bend to

different altitudes on the axis.

  9) Metal bar cold volueter according to claim I characterized in that the volute (17) is a volute of first adjustable shape and composed of two complementary parts, a first part (80) so l idari se e flat to and a second part (84) comprising several fixing positions on the plate so that the two parts fixed on the plate have an outer lateral surface in the form of a spiral which is increasingly open according to the positions of

securing the second part (84).

  ) Method of cold volutage in relief of a metal or rectangular bar (19) or square on an edge at a first end (I 9a) and on a flat at the other end (19b) characterized in that it comprises at least the following stages: in a first stage of stabilization of a metal bar (19) on an edge on a plate (17) by inserting it into the recess (26) of a part -, in contact with this bar of metal, a first end (19a) of the bar (19) is slid into a volute of first shape (17) b a second step of bending while maintaining this part provided with a recess (26) in contact with the bar ( 19) in pressure in its obviously S c a third step of withdrawal of the bar (19), worked at a first end (19a), and to present its second end (19b) on the plate of a fourth step or the bar of metal (19) is arranged flat, the second end (19b) of the bar being glued issce in a first form volute (17) e a fifth step of bending the bar (19) at its second end (19b) on a flat