KR20190056445A - A bending apparatus for forming a corrugation on a metal plate and a method using the bending apparatus - Google Patents

Abstract

The present invention relates to a bending device (9) for forming a corrugation (2) on a metal sheet (1) for the construction of a sealed membrane of a fluid storage tank, wherein the bending device (9) ; a lower matrix comprising first and second matrix elements (15, 16) slidably mounted on the lower frame (11) in the x direction; An upper punch 12; Wherein the auxiliary means comprise first and second flange clamps 24 and 25 and wherein the bending device 9 also comprises auxiliary means 36 and 37 which are connected to the first and second matrix elements 15 and 16, To move toward a position adjacent to each other. The present invention also discloses a method of using such an apparatus.

Description

A bending apparatus for forming a corrugation on a metal plate and a method using the bending apparatus

The present invention relates to a bending device for forming a wrinkle on a metal plate.

Metal plates obtained by this kind of bending device are particularly for the construction of fluid-tight membranes of fluid storage tanks. The present invention also relates to the field of fluid seal and thermal insulation membranes for the storage and / or transport of fluids such as cryogenic fluids.

International Publication WO 2015170054 discloses a bending apparatus for forming a corrugation at right angles to the preformed corrugation on a metal plate comprising preformed corrugations. The bending device includes a lower die having first and second die elements, each die element having a metal plate bearing surface and a concave half of the engraved portion, wherein the first and second die elements And can be slid between the spaced position and the gathered position. The engraved portions of the first and second die elements in the above-mentioned gathered positions together form an imprint corresponding to the shape of the corrugation to be formed. The bending apparatus further includes an upper punch, which can move relative to the lower frame and has a shape complementary to the shape of the engraved portion. Also, the first and second die cushions extending over the respective opposite sides of the upper punch, each facing the first and second die elements, slide in the x direction between an apart position and a collect position, Respectively.

In operation, when the metal plate is clamped between the die cushions and the die elements, moving the upper punch from the rest position to the bending position drives the bending of the metal plate, and while bending the metal plate, force to the die elements and die cushions in the x-direction and thus move them to the gathered position.

In the embodiment shown in FIG. 16 of the above-mentioned document, the bending device has means for assisting in moving the die elements and die cushions to a location where they are gathered. Such ancillary means is particularly advantageous in that it enables to ensure that the die elements and die cushions move throughout their movement, that is, to move to the final gathered position, while the punch is moving to the bending position. The assisting means includes cam followers which are configured to act upon cam surfaces maintained by the upper frame when the upper frame is moved from the rest position to the bending position. Also, when the upper punch is moved from the rest position to the bending position, the cam surfaces tend to be directed toward the cam surfaces so as to be supported on the cam follower and move to the location where the die elements are gathered. However, such ancillary means are not entirely satisfactory. In practice, the force aiding the movement is applied to the die elements in a cantilever fashion, which is likely to degrade the sliding connection in which the die elements are mounted for translation. Furthermore, since the cam surfaces and the cam followers are respectively disposed at the heights of the side of the upper frame and the die elements, such an auxiliary means significantly increases the overall size of the bending device.

An object of the present invention is to provide a bending apparatus for forming a wrinkle on a metal plate and a method of using the bending apparatus.

One concept on which the present invention is based is to propose a compact and reliable bending apparatus for forming corrugations on metal plates.

In one embodiment, the invention provides a bending device for forming a wrinkle on a metal plate for the construction of a fluid-tight membrane of a fluid storage tank, said bending device comprising:

A lower frame;

A lower die having a first die element and a second die element, each having a bearing surface for a metal plate and a concave half of imprinting, wherein each of the first die element and the second die element is in a spaced- The first die element and the engraved halves of the second die element are mounted on the lower frame so as to be slid in the x direction to slide between the gathered positions, A lower die together with an engaging portion corresponding to a shape of a wrinkle portion to be formed when the lower die is formed;

An upper punch disposed on a lower die, the upper punch having a lower end provided with a head having a complementary shape to the shape of the impression, the upper punch being movable vertically relative to the lower frame between a rest position and a bend position , The head of the upper punch at the bending position meshing inside the engraved portion of the lower die to be pressed onto the metal plate; And

A first die cushion and a second die cushion extending on respective opposing sides of the upper punch on the lower die, the first die cushion and the second die cushion facing the first die element and the second die element, respectively, Wherein the first die cushion and the second die cushion are movable vertically relative to the lower frame between the unlocked position and the clamping position, and wherein the first die The cushion and the second die cushion comprise a first die cushion and a second die cushion respectively adjacent the bearing surfaces of the first die element and the second die element for clamping the metal plate against the bearing surfaces of the first die element and the second die element, And a die cushion,

The bending device further comprises an auxiliary means configured to assist in moving the first die element and the second die element to a location where they are gathered,

A first arm and a second arm each mounted on a lower frame to pivot about a respective rotational axis, each arm including a first arm and a second arm, the first arm and the second arm being pivoted in such a manner as to pivot the upper punch from the rest position to the bending position, A first arm and a second arm having a first end configured to move while the punch is moving from the rest position to the bending position and a second end provided with the cam follower,

The cam followers of the first and second arms are configured to act with the cam surfaces respectively held by the first die element and the second die element; During pivotal actuation of the first arm and the second arm, which is driven by the upper punch moving from the rest position to the bending position, each cam follower rests on a respective cam surface held by a first die element or a second die element A cam follower and a cam surface are provided so as to exert a force that tends to move the first die element and the second die element to a position where they are gathered in the x direction.

Thanks to such ancillary means, the movement of the die elements is synchronized with the movement of the upper punch and does not require a dedicated actuator.

In addition, the first and second arms are supported on the lower frame, and the force assisting the movement of the die elements is not applied in a cantilever manner on the die elements, which creates the risk of degrading the sliding connection , Wherein the die elements are mounted for translational movement through the sliding connection.

Embodiments of this type of bending apparatus may have one or more of the following advantages.

According to one embodiment, the rotational axes of the first and second arms are horizontal and perpendicular to the x-direction.

According to one embodiment, the auxiliary means comprises a contact member, the contact member being mounted on the lower frame so as to be vertically movable and having a bearing surface located between the engaging portions of the first die element and the half of the second die element, The metal plate is pinched between the bearing surface of the contact member and the upper punch and the upper punch and the contact member move in the direction of the lower frame while the upper punch moves from the rest position to the bending position; The contact member is supported with respect to the first end of each of the first arm and the second arm such that the first arm and the second arm are pivoted while the upper punch moves from the rest position to the bending position. According to an equivalent embodiment, each arm acts with a separate contact member.

According to one embodiment, the bearing surface of the contact member is flush with the bearing surface of the first and second die elements when the upper punch is in the rest position.

According to one embodiment, the first end of each of the first and second arms has an idler roller, and the cam surface of the contact member is held against the idler roller.

According to one embodiment, the cam surfaces held by the first die element and the second die element are moved between the first end of the first arm and the second arm and the cam follower of the first arm or the second arm in the x direction And an angle formed between a first vertical axis passing through the rotation axis of the arm and a second axis passing through the rotation axis and the second end of the arm moves from the rest position to the bending position, Each of the cam followers moving in the direction of the cam surface to move the first die element and the second die element on their respective cam surfaces in a direction of its cam surface, Apply a force that tends to move to a gathered position.

According to one embodiment, the cam surfaces held by the first and second die elements are surfaces oriented in a general direction intersecting the x direction.

According to one embodiment, each cam follower having a second end of one of the first and second arms is received in a groove held by one of the first die element and the second die element, One of the sides of the groove.

According to one embodiment, the cam surfaces are mounted on the first die element and the second die element, respectively, so that they can be adjusted in the X direction. This allows adjustment of the relative positioning of the cam surfaces relative to the kinematics of the first and second arms to control the intervention of the ancillary means.

According to one embodiment, each of the first and second arms is bent.

According to one embodiment, each of the cam followers providing the second end of the first and second arms is an idler roller.

According to one embodiment, the auxiliary means further comprises third and fourth arms pivotally mounted about respective rotational shafts, each arm having a third and fourth arms, while the upper punch moves from the rest position to the bending position, A first end configured to move while the upper punch moves from the rest position to the bending position such that the arms pivot, and a second end provided with the cam follower;

The cam followers of the third and fourth arms are connected to the first die element and the second die to assist in moving the first die element and the second die element to the assembled position while the upper punch moves from the rest position to the bending position. Are each configured to cooperate with the individual cam surfaces held by the elements.

According to one embodiment, the first arm and the second arm on the one hand and the second arm and the fourth arm on the other hand are arranged on separate opposite sides of the intermediate transverse plane oriented in the x direction.

According to one embodiment, the auxiliary means comprises two contact members and each contact member is movably mounted on a lower frame vertically, and the auxiliary means is engraved in half of the first die element and the second die element By having the bearing surface positioned between the sections, the metal plate is held between the upper punch and the bearing surface of each contact member, and the contact members move in the direction of the lower frame while the upper punch moves from the rest position to the bending position ; The two contact members are respectively supported with respect to the first ends of the first and second arms and with respect to the first ends of the third and fourth arms, respectively, so that the upper punch moves from the rest position to the bending position The first arm, the second arm, the third arm, and the fourth arm are pivoted.

According to one embodiment, the two contact members are symmetrical with respect to a vertical symmetry plane.

According to one embodiment, a bending device is for forming a wrinkle at a right angle to a preformed preform on a metal plate, said bending device comprising:

Two blades for deforming preformed corrugations on the respective opposing sides of the intersection region between the preformed corrugation and the corrugation to be formed, as two blades between the lower position on the lower frame and the upper position for bending the previously formed corrugation Two blades mounted for movement; And

And a motion transfer mechanism configured to transfer movement between the contact members and the blades such that the blades move to an upper position for bending while the upper punch moves from the rest position to the bending position Respectively.

According to one embodiment, the blades are each mounted on the support member so as to slide in the x direction between a spaced position and a gathered position; The support member is mounted on the lower frame so as to be vertically movable; The apparatus for operating the blades includes two levers, each of the levers being mounted on the lower frame and articulated relative to the lower frame, and each lever being movable between a rest position and a bending position, A first end acting in conjunction with one or the other of the two contact members to drive a pivoting action, and a second end; The second ends of the levers act together with the support members to move the blades vertically from the lower position to the upper position for bending during the pivoting action of the levers driven by moving the support member vertically and thus moving the upper punch from the rest position to the bending position It moves.

According to one embodiment, the levers are mounted pivotally about a horizontal axis of rotation oriented in the x direction.

According to one embodiment, the levers are symmetrical with respect to a vertical plane of symmetry. The levers are thus pivoted in opposite rotational directions, which ensures a balance of forces.

According to one embodiment, each of the blades is held by a carrying part slidably mounted on the guide rail, and the guide rail is fixed to the support member and extends in the transverse direction.

According to one embodiment, the bending apparatus has one or more elastic members configured to deflect the blades toward a spaced position.

According to one embodiment, the first and second die elements are biased towards the spaced position by the first biasing member.

According to one embodiment, the first and second die cushions are biased towards a position spaced apart by the second biasing member.

According to one embodiment, the bending device is intended to form a corrugation in a metal plate having a preformed corrugation extending in a direction perpendicular to the corrugation to be formed, each of the first and second die elements having a V- And these grooves are intended to receive the preformed corrugations.

According to one embodiment, each of the die cushions includes a male element projecting in the direction of the lower frame, which has a V shape, the V shape being introduced into the groove of the facing die element when the die cushions are in the clamping position .

According to one embodiment, the head of the upper punch has fingers protruding from the head in the direction of the lower frame, and the fingers are oriented toward the area of the intersection between the grooves of the first and second die elements and the engraving.

According to one embodiment, the first and second die cushions are mounted on the first and second support plates, respectively, to slide vertically; The first and second support plates being mounted on the upper frame to slide in the x direction to allow movement of the die cushions between the gathered and spaced positions; Each die cushion is deflected by the biasing members at a distance from the respective support plate.

According to one embodiment, the biasing members for biasing the biasing force between each die cushion and its respective support plate are a spring, a gas cylinder, a hydraulic cylinder or pneumatic cylinders.

According to one embodiment, each cam surface has a profile at its upper portion, the profile of which emanates from the half-angled portion upward from the bottom. This kind of profile is particularly advantageous in that it positions the intervention of the auxiliary means at the end of the movement.

According to one embodiment, there is provided a method of using the above-mentioned bending apparatus,

Positioning the metal plate to bear against the bearing surfaces of the first die element and the second die element; And

Moving the upper punch from the rest position to the bending position to form a wrinkle on the metal plate.

Another concept on which the present invention is based is to propose a reliable and compact bending device for forming a corrugation on a metal plate, which comprises blades intended to deform preformed corrugations perpendicular to the corrugation to be formed.

According to one embodiment, the present invention provides a bending device for forming a wrinkle on a metal plate for the construction of a fluid-tight membrane of a fluid storage tank, wherein the wrinkles to be formed are perpendicular to the preformed wrinkles on the metal plate, The bending apparatus comprises:

A lower frame;

A lower die configured to form an imprint corresponding to the shape of the wrinkle to be formed;

An upper punch disposed on a lower die, the upper punch having a lower end provided with a head having a shape complementary to the shape of the stamp, the upper punch being movable vertically relative to the lower frame between a rest position and a bend position, The head of the upper punch at the bending position engaging the inside of the engraved portion of the lower die to be pressed onto the metal plate;

Two blades for deforming preformed corrugations in the respective opposite sides of the crossing region between the preformed corrugation and the corrugation to be formed as two blades for moving between the lower position and the upper position for bending the previously formed corrugation, Two blades mounted on the blade; And

An operating device of the blade, the operating device of the blade comprising:

At least one contact member mounted on the lower frame so as to be able to move vertically by having a bearing surface located inside the engraved portion of the lower die such that the metal plate is held between the bearing surface of the contact member and the upper punch, The contact member moving in the direction of the lower frame while the upper punch moves from the rest position to the bending position; And

A movement transmission mechanism configured to transmit movement between the contact member and the blade such that the blades move toward an upper position for bending while the upper punch moves from the rest position to the bending position, Wherein the at least one lever is mounted on the lower frame and articulated relative to the lower frame and includes a housing formed in the contact member for driving the pivoting action of the lever while the upper punch moves from the rest position to the bending position, And a first end mounted to be movable within the body.

This type of construction is particularly advantageous in that it can reduce friction between the contact member and the metal plate. Moreover, this allows the contact member to have a bearing surface with a large and constant dimension during the movement of the upper punch in the direction of the bending position. The bending device of this kind thus enables the deformation of the preformed corrugation to prevent marking on the plate in areas where the plate is supported with respect to the contact members intended to transmit movement to the blades .

Embodiments of such bending devices of the kind may have one or more of the following features.

According to one embodiment, the first end of the lever is provided with a roller mounted in a housing formed in the contact member for movement.

According to one embodiment, the bending apparatus has two contact members, each of which has a bearing surface mounted on the lower frame so as to be vertically movable and positioned inside the engraved portion of the lower die, Is sandwiched between the upper punch and the bearing surface of each contact member, the contact members moving in the direction of the lower frame while the upper punch moves from the rest position to the bending position; The motion transfer mechanism includes two levers, each of which is mounted on the lower frame and articulated relative to the lower frame so that the upper punch can move to drive the pivoting action of the levers while moving from the rest position to the bending position And a first end mounted to the housing formed in one or the other of the contact members.

According to one embodiment, the levers are pivoted about horizontal rotation axes oriented in a direction transverse to the longitudinal direction of the crease to be formed.

According to one embodiment, the two levers are symmetrical about an intermediate transverse plane. Thus, the levers are pivoted in opposite rotational directions, which ensures a balance of forces.

According to one embodiment, the bending device further comprises an abutment mechanism configured to stop movement of the contact member in the direction of the lower frame. This kind of abutment mechanism can ensure the positional accuracy of the blades, especially at the upper position for bending.

According to one embodiment, a lever or a first end of each lever is provided with a geometrically shaped shaft rotatably mounted with a roller, said geometric shaft comprising at least one Lt; / RTI >

According to one embodiment, a geometric shaft is configured to abut against the end of the groove to form a contact mechanism configured to stop movement of the contact member in the direction of the lower frame.

According to one embodiment, the blades are each mounted on a support member and slid in a direction transverse to the longitudinal direction of the wrinkles to be formed between the spaced position and the gathered position; The support member is mounted on the lower frame to move vertically; The lever or each lever has a second end; The second end of the lever acts in conjunction with the support member to move the support member vertically and thus moves the blades from the lower position to the upper position for bending during the pivoting action of the lever driven by the upper punch moving from the rest position to the bending position .

According to one embodiment, each of the blades is held by a carrying part slidably mounted on the guide rail, and the guide rail is fixed to the support member and extends in the transverse direction.

According to one embodiment, the lower die comprises first and second die elements, each die element having a metal plate bearing surface and a concave half of the engraved portion, wherein the first and second die elements are each on a lower frame The first and second die elements can be slid between a spaced position and a gathered position by sliding in the x direction and the engraved portions of the first and second die elements can be formed when the first and second die elements are in a gathered position An engraved portion corresponding to the shape of the wrinkle portion to be formed is formed together.

According to one embodiment, the bearing surfaces of the contact members or respective contact members are at the same height as the bearing surfaces of the first and second die members when the upper punch is in the rest position.

One embodiment of the present invention provides a method of using a bending device, comprising:

Positioning the metal plate in a supported manner against the lower die; And

To form a wrinkle on the metal plate, and

In order to move the blades from the lower position to the upper position for bending the preformed wrinkles,

Moving the upper punch from the rest position to the bending position.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood from the following description, taken in conjunction with the accompanying drawings, of a number of specific embodiments of the invention, which are provided by way of non-limiting example only, will be.
1 is a cross-sectional perspective view of a bending device in a rest position;
Figure 2 is a cross-sectional perspective view of the bending device from Figure 1 in the bend position.
Figure 3 is a partial perspective view of the lower frame of the bending device, only a portion of which is shown.
4 is a cross-sectional view similar to that of Fig.
Figure 5 is a partial perspective view of a lower frame of a bending device in which the die elements are shown only partially.
6 is a cross-sectional view of the longitudinal plane detailing the device for the operation of the blades while the bending device is in the bending position.
Figure 7 is a partial view of a lower frame showing part of the device and auxiliary means for actuating the blades, the auxiliary means being adapted to assist in moving to a position where the first and second die elements are gathered.
Fig. 8 is another partial view of a lower frame showing part of the device and auxiliary means for actuating the blades, in which the auxiliary means are arranged to assist in moving to the position where the first and second die elements are gathered.
9 is a view of a corrugated metal plate intended for the construction of a fluid-tight membrane of a liquefied natural gas storage tank.
10 is a partial perspective view of a lower frame of a bending apparatus according to a modified embodiment.
Figure 11 is a partial view of a bending device according to another embodiment in a rest position.
Fig. 12 is a partial view of the bending device of Fig. 11 in the bending position.

Figure 9 shows a corrugated metal plate 1, which is intended for the formation of a fluid-tight membrane of a storage tank for cryogenic fluids such as liquefied natural gas.

The rectangular metal plate 1 has a first row of parallel low wrinkles 2 extending from one edge of the plate to the other edge in the y direction and a second row of parallel low wrinkles 2 extending from one edge of the metal plate 1 to the other edge in the x direction And an extended second row of parallel high wrinkles 3. The direction (x, y) of the series of corrugations is a right angle. The corrugations 2,3 protrude from the inner surface of the metal plate 1, for example, intended to contact the fluid contained in the tank. Here, the sides of the metal plate 1 are parallel to the corrugations 2,3. The terms " high " and " low " have relative meanings, and the so-called low-wrinkling portion 2 has a lower height than the so-called high-wrinkling portion 3. In a variation not shown, the corrugations 2,3 may have the same height.

The metal plate (1) has a plurality of flat surfaces (4) between the corrugations (2, 3). At each intersection level between the low wrinkle 2 and the high wrinkle 3, the metal plate 1 has a node zone 5. The nodal region 5 has a central portion 6 with a summit protruding toward the interior or exterior of the tank. Moreover, the central portion 6 is formed by a pair of concave corrugations 7 formed on the crest of the high corrugation 3 on the one hand and by a pair of depressions 8 on the other hand , And the lower corrugated portion (2) penetrates into the depressed portion.

The corrugations 2, 3 of the metal plate 1 allow the sealing membrane to be flexible and to allow it to be deformed due to the effects of thermal stress and mechanical stress generated by the liquefied natural gas stored in the tank .

The metal plate 1 may be made of an alloy of iron and nickel, in particular stainless steel, aluminum, Invar (registered trademark), i.e. having an expansion coefficient between 1.2 x ^10-6 and 2 x ^10-6 K- ¹ or, or an expansion coefficient of typically 7 × 10 ^-6 K ^- can be made of a ferrous alloy having a degree of high manganese content of ^1. However, the use of other metals or alloys is also contemplated.

As an example, the metal plate 1 has a thickness of approximately 1.2 mm. Thicknesses of the metal plate 1 increase the cost and increase the rigidity of the wrinkles 2, 3 as a whole. As an example, the metal plate has a width of 1 m and a length of 3 m.

Figures 1-8 illustrate a bending device 9 that allows the formation of the lower wrinkle 2 and the nodal region 5 between the previously formed higher wrinkle 3 and the lower wrinkle 2 .

Conventionally, the orientation in the "longitudinal direction" of the bending device 9 is parallel to the axis y, i.e. parallel to the direction of the crease 2 to be formed and the "transverse" That is, transverse to the direction of the crease 2 to be formed.

As shown in Figs. 1 and 2, the bending apparatus 9 has an upper frame 10 and a lower frame 11. The upper frame 10 and the lower frame 11 can move vertically relative to each other between the rest position shown in Fig. 1 and the bending position shown in Fig.

The upper frame 10 is provided with an upper punch 12 so that it can apply pressure on the metal plate and the pressure can bend the metal plate and form the corrugation 2. [ The upper punch 12 has a head 13 at the lower end thereof and the head is elongated in the longitudinal direction. The head 13 has a convex portion, and its section has a V shape corresponding to the shape of the wrinkle portion to be formed. The upper punch 12 further comprises a finger 14 protruding from the middle region of the head 13 in the direction of the lower frame 11. [ The fingers 14 have a blade shape and the blade shape is configured to deform an intersection region between a preformed corrugation to be formed and a corrugation to be formed to form a protrusion apex in the nodal region.

Moreover, the bending device 9 has a die composed of first and second die elements 15,16, and the die elements are slid horizontally horizontally between the spaced and gathered positions, Is mounted on the frame (11). The die elements 15,16 have a bearing surface 17 and are intended to bear the metal plate 1 against the bearing surface. Each of the die elements 15,16 further comprises a half imprint 18,19 on the side facing the other die element 15,16. When the two die elements 15, 16 are in the gathered position, the half engravings 18, 19 together form an imprint corresponding to the shape of the corrugation to be formed. Further, in the gathered position, the engraving portion is disposed under the head 13 of the upper punch 12.

The biasing members, not shown, bias the two die elements 15, 16 towards their spaced apart positions. The biasing members are, for example, springs, each spring bearing against one of the die elements 15, 16 on the one hand and against an element fixed relative to the lower frame 11 on the other hand. According to another embodiment, which is not shown, the biasing members are springs whose ends are respectively supported against one and the other of the two die elements 15,16.

Furthermore, the lower frame 11 may be provided with abutment elements 20 to limit the return movement of the die elements 15,16, which may cause the spacing of the die elements 15,16 relative to the lower frame < RTI ID = To define the location of the location. The abutment element 20 is fixed with respect to one side of the lower frame 11 and has a portion protruding toward the die elements 15,16, the ends of which form an abutment surface.

Each die element 15,16 is fixed to a carrying part 21 mounted on the guide rail 22 held by the lower frame 11 so as to slide horizontally in the transverse direction. The conveying portion 21 is advantageously a rolling carriage, which has a plurality of rolling bodies configured to cooperate with rolling tracks held by the guide rails 22.

The die elements 15, 16 each have a laterally directed void space, such as a V-shaped groove 23 in the middle, which extends transversely to allow passage of preformed wrinkles.

Furthermore, the upper frame 10 holds two die cushions 24, 25, which extend on the respective opposite sides of the upper punch 12. [ Each die cushion 24, 25 is disposed thereon towards the respective die element 15, 16. The die cushions 24 and 25 are held by the upper frame 10, which are configured to move vertically from the unlocked position to the clamping position and at the clamping position, the die 10 is moved toward the lower frame 11, Presses the metal plate (1) against the bearing surface (17) of the elements (15, 16).

The die cushions 24 and 25 are mounted so as to move vertically with respect to the upper frame 10. [ To this end, each die cushion 24, 25 is mounted on a support plate 26 so as to slide vertically through a guide device. The guide device has a plurality of guide portions 27 which are fixed to each of the die cushions 24 and 25 and are mounted on and slid into bores formed in the support plate 26. [ Furthermore, gas cylinders 28, also known as gas springs, have a first end fixed to the support plate 26 and a second end fixed to one of the die cushions 24,25. The gas cylinders 28 exert a force on the die cushions 24,25 which tends to move the die cushions downwardly away from the support plate 26. [ The movement of the die cushions 24 and 25 into the clamping position and the movement of the upper punch 12 to the bending position results in the upper frame 10 moving downward in the direction of the lower frame 11 Can be performed simultaneously with movement. Alternatively, the gas cylinder 28 may be replaced by any other suitable deflecting means and may be replaced by, for example, a coil spring or hydraulic cylinder or pneumatic cylinder.

The die cushions 24 and 25 are slidably mounted horizontally in a transverse direction perpendicular to the longitudinal direction of the creases to be formed, between the spaced positions and the gathered positions. To this end, each support plate 26 is fixed to the carrying parts 29, which are mounted on and slid on the guide rails 30 held by the upper frame 10. Moreover, the one or more biasing members 31 shown in FIG. 1 deflect the die cushions 24, 25 toward their spaced apart positions. As one example, the biasing members 31 are springs, which have a first end bearing against the lateral face of the punch 12 and a second end bearing against the opposing support plate 26.

In addition, the upper frame 10 is provided with abutment elements 32 for restricting the movement of the die cushions 24 and 25 relative to the upper frame 10, In order to define the separation positions of the two. Each abutment element 32 has a plate 34 fixed to the upper frame 10 which is provided with an internally threaded bore and an externally threaded screw 33 so that the screw 33 Act together with the internally threaded bore and the end protruding in the direction of one of the die cushions 24 and 25 constitutes the abutment surface.

Each die cushion 24, 25 has a downwardly projecting male element 35 on a groove 23 formed in the facing die elements 15, 16. Thus, during operation, when the die cushions 24, 25 are in the clamping position, the preformed high corrugations are pressed against the male elements 35 of the die cushions 24, 25 and the grooves 23 of the die elements 15, / RTI > So that the metal plate 1 is clamped to the level of the preformed corrugation.

Moreover, the bending device 9 is provided with an auxiliary means adapted to assist in moving to the position where the die elements 15,16 are gathered. The auxiliary means enables to ensure that the die elements 15,16 and eventually the die cushions 24,25 move throughout their travel distance while the upper punch 12 is moving to the bending position, As shown in FIG.

The auxiliary means comprises at least one arm 36, 37 shown in Figures 1-5 for each of the die elements 15, 16, which is mounted on the lower frame 11 and pivoted thereon. The arms 36 and 37 are rotatable about the horizontal rotation shaft 39 and 40 and are oriented parallel to the longitudinal direction. In the illustrated embodiment, the auxiliary means comprises two arms 36, 37, 38 for each of the die elements 15, 16. The two arms 36, 38 which assist in the movement of the same die element 15 are advantageously identical and their rotating shafts 39, 40 are advantageously aligned. The two arms 36, 38 intended to assist in the movement of the same die element 15 are arranged on separate opposite sides of the intermediate transverse plane of the lower frame, Thereby enabling a uniform distribution of force.

For example, as shown in Figs. 3, 7 and 8, the arms 36, 37 are mounted on the T-shaped support 62 and rotate thereon. Each of the supports 62 is positioned adjacent to the edge of the lower frame 11 and is centered about a longitudinally oriented mid-vertical plane. The rotating shafts 39, 40 of the two arms 36, 37 are located at the two ends of the upper branch of T.

Each of the arms 36 and 37 has a first end 41 configured to move in the direction of the lower frame 11 while the upper punch 12 is moving from its rest position (Figure 1) to the bending position (Figure 2) Which is intended to cause the arms 36, 37 to pivot. To this end, the auxiliary means comprises two contact members 43, 44 which are vertically movable on the lower frame 11. [ Each of the contact members 43,44 has a bearing surface 45 located inside the imprint of the die, i.e. between the die elements 15,16. 1, the bearing surfaces 45 of the two contact members 43, 44 are located on the bearing surface 17 of the die elements 15, 16 when the upper frame 10 is in its rest position, .

While the upper punch 12 is moving from its rest position to the bending position, when the upper punch 12 reaches the intermediate position of contact with the metal plate 1, the head 13 of the upper punch 12 is initially So that the metal plate 1 is clamped against the bearing surfaces 45. Moving the upper punch 12 from the above-mentioned intermediate contact position to the bending position shown in FIG. 2 then causes the bearing surfaces 45 to move downward in the direction of the lower frame 11. During operation, when the upper punch 12 is brought into contact with the portion of the metal plate to be bent, the upper punch 12 is forced against the contact members 43, 44, And tends to move the contact members toward the lower frame 11.

The cam surfaces of each of the contact members 43 and 44 are supported on the first one of the two arms 36 and 37 so that the contact members 43 and 44 are moved in the direction of the lower frame 11 The arms 36,37 are pivoted when moved down. The first end 41 of each of the arms 36 and 37 is provided with idler rollers on a longitudinally oriented horizontal shaft which cooperate with the cam surfaces of the contact members 43 and 44 , Undesirable friction can be reduced. The rollers are advantageously equipped with bearings which can further reduce unwanted friction.

1 to 5, the second end 42 of the arms 36 and 37 has a cam follower, which is connected to the idle roller 46 on a longitudinally oriented horizontal shaft . Each roller 46 can be received in a groove 47 formed in one of the die elements 15,16 by being offset relative to the plane in which the arm is pivoted. The grooves 47 are formed by two surfaces extending in a substantially vertical direction on the respective opposite sides of the roller 46 in the transverse direction. The surface defining the groove 47 in the direction of the longitudinal median plane of the bending device 9 constitutes the cam surface 48 configured to act with the roller 46.

The two arms 36, 37 extend in two distinct transverse planes. Also, when the upper punch 12 moves toward the lower frame 11, the two arms 36, 37 are pivoted in opposite rotational directions. In the illustrated embodiment, the arms 36, 37 are bent.

The configuration of each of the arms 36, 37 may be formed as a supplement to the following two geometrical axes: a first vertical axis passing through the axis of rotation of the arms 36, 37 and, And a second axis intersecting the rotation axis and intersecting the rotation axis of the roller 46 on the other hand. When the arm 36,37 is pivoted because the upper punch 12 is moved from its rest position to its bending position, the first and second axes defined by the arms 36,37 respectively The arms 36 and 37 are configured so that the angle formed is reduced. That is, the arms 36, 37 are configured so that the portion of the arms 36, 37 extending between the second end of the arms and the axis of rotation, while vertically moving the upper punch 12 to its bend position. During bending, therefore, each roller 46 exerts a horizontal force directed onto the respective cam surface 48 towards the longitudinal median plane of the bending device 9, which causes the die elements 15,16 ) To move them to the location where they are gathered. Conversely, when the bending action is completed and the upper frame 10 is returned to its rest position, the die elements 15,16 are deflected toward the spaced apart positions by the respective biasing members, Which is directed away from the longitudinal median plane of the bending device 9 on the arm 46 until the arms return to the initial position shown in Figure 1, As shown in Fig.

Grooves 47 are formed in each part 64, the position of which can be adjusted along the axis X with respect to the individual die elements 15,16. Thus, the period of intervention of the auxiliary means can be adjusted. To this end, each part 64 is fixed to a respective die element 15,16 by means of a control screw 65 which controls the position of the part 64 relative to the die elements 15,16 Can be adjusted.

In the embodiment of Figures 1-8, the cam surface 48 is a vertical surface. However, the cam surface 48 may have different profiles depending on the kinematics of the required movement of the dies and as a function of the period of kinematics in which intervention of the auxiliary means is required. 10, the cam surface 48 has a profile 66 at its upper portion, which diverges from the longitudinal intermediate plane of the bending device in the upward direction from the bottom. This type of profile is particularly advantageous in that the intervention location of the auxiliary means is preferably at the end of the movement.

Moreover, the bending device 9 has two blades 49, 50 and a device for actuating the blades, which are arranged on the lower frame 11, as shown particularly in Figures 3, 4, And the device is particularly shown in Figs. 5 and 6. Fig. The blades 49, 50 are disposed on separate opposite sides of the longitudinal median plane. The blades 49 and 50 each have a blade which is directed upward and extends parallel to the longitudinal direction. The blades 49 and 50 are intended to deform preformed corrugations on both sides of the intersection between the preformed corrugation and the corrugation to be formed in order to form a concave corrugation at the top of the previously formed corrugation.

The blades (49, 50) are slidably mounted relative to the lower frame (11) in the transverse direction between the spaced and gathered positions. To this end, the blades 49, 50 are respectively secured to a carrying part 51 slidably mounted on the guide rail 52.

The guide rails 52 are held by the support member 53 shown in Fig. The elastic members, not shown, automatically deflect the blades 49 and 50 toward the spaced apart positions. To this end, the spring members act between the central portion of the support member 53 and the blades 49, 50.

 Further, the support member 53 is mounted so as to move vertically with respect to the lower frame 11 between an upper position and a lower position for bending the preformed corrugation, and in the upper position, the blades 49, Can work with it to form. The support member 53 is guided to translate relative to the lower frame 11. [ 6, the support member 53 has a cylindrical bore at a central portion disposed opposite the finger 14, which is fixed to the lower frame 11 and is fixed to the upper frame 10, Of the guide tube 54 in a complementary manner.

The bending device 9 comprises a device for the operation of the blades shown in Fig. 6, in which the blades 49, 50 move upwardly from the lower position to the upper bending position during the bending action, As shown in FIG. The device for actuating the blades has two levers 55,56. The levers 55 and 56 are each mounted on the lower frame 11 and articulated with respect to the lower frame 11 around the horizontal horizontal axis of rotation.

The levers 55 and 56 each have a first end 57 provided with a roller 58 and the roller is mounted in a housing 59 formed in one or the other of the contact members 43 and 44, . Each of the housings 59 is formed by a top surface and two lateral walls on which grooves the bottom surface and rollers the rollers roll.

The levers 55 and 56 are pivoted when the contact members 43 and 44 move downward in the direction of the lower frame 11 because the upper punch 12 moves from the rest position to the bending position. 1 and 2, the first end 57 of the levers 55, 56 has a metal pin or cylinder 63, which is coaxial with the axis of rotation of the roller 58, Lt; RTI ID = 0.0 > 58 < / RTI > To this end, a fork can be provided, in particular at the ends of the levers 55,56, which has two parts extending on the respective opposite sides of the roller 58 and which pin 63 is fixed do. The pins 63 are also received in the grooves formed in the lateral walls of the contact members 43 and 44 on the respective opposite sides of the housing 59 to enable the rollers 58 to be retained within the housing 59. 5, the pin 63 is configured to abut against one of the ends of the grooves, which stops movement of the contact member in the direction of the lower frame 11 . This allows the blades to be accurately positioned at their upper bending position.

6, the levers 55, 56 each have a second end 60 that cooperates with the support member 53 to move vertically during the pivoting action of the levers 55, 56. To this end, the second end (60) of each lever (55, 56) acts in conjunction with the horizontal rim (61) held by the central portion of the support member (53). The levers 55, 56 are symmetrical about the transverse midplane. Thus, the levers 55,56 are pivoted in opposite rotational directions, which ensures a balance of forces.

During operation, when the upper punch 12 is brought into contact with the portion of the metal plate 1 that is to be bent, the upper punch 12 is pushed through the contact members 43, A force is exerted on the first end 57. This force causes the second ends 60 of the levers 55 and 56 to move between the horizontal edges of the support members 53 when the blades 49 and 50 are moved to their upper bending position by pivoting the levers 55 and 56 61), and at the upper bending position, the blades deform the apex of the preformed corrugation (3). When the bending action is completed and the upper punch 12 is raised to its rest position, the support member 53 returns to its lower rest position due to the effect of gravity and the levers return to its initial rest position And drives the pivotal action of the levers 49, 50 in the opposite rotational direction until the pivotal movement. The contact members 43 and 44 then return to their initial positions in which the bearing surfaces 45 of the two contact members 43 and 44 are in contact with the bearing surface 17 of the die elements 15 and 16, .

A method of using the bending device 9 is described below.

Initially, the metal plate 1 is placed on the bearing surface 17 of the die elements 15,16. The metal plate 1 is arranged so that its preformed high corrugations are located inside the V-shaped grooves 23 of the die elements 15,16.

Thereafter, the upper frame 10 moves downward in the direction of the lower frame 11 until the die cushions 24, 25 are located in their clamping positions, and in the clamping position the metal plate is moved downwardly by the die elements 15, The bearing surface 17 of which is shown in Fig. Then, as the gas cylinder 28 is compressed, the upper frame 10 continues to lower, causing the upper punch 12 to deform the metal plate 1. [

When the metal plate 1 is clamped between the die cushions 24 and 25 and the die elements 15 and 16 and deformed by the effect of the upper punch 12, By applying a traction force opposing the biasing members on the die elements 15,16.

At the same time, the metal plate 1 is clamped between the bearing surface 45 of the contact members 43, 44 and the upper punch 12, and the contact members 43, 44 move toward the lower frame 11. This movement of the contact members 43, 44 simultaneously drives the pivoting action of the arms 36, 37, 38 and the levers 55, 56.

The effect of the pivoting action of the arms 36,37 and 38 is such that by moving the cam followers 46 they can move on the respective cam surfaces 48 held by the die elements 15,16, Which forces them to assist in moving to the position where the die elements 15,16 are gathered. The force exerted on the die elements 15, 16 to move the die elements to a gathered position is advantageously constituted by this kind of auxiliary means so that they are applied in part due to the effect of the deformation by the metal plate, So that intervention only at the end of the movement ensures that the die elements 15,16 reach their final gathered position.

Moreover, pivoting the levers 55,56 drives the movement of the blades 49,50 to the upper position and eventually causes deformation of the preformed corrugations on the respective opposite sides of the intersection between the preformed corrugation and the corrugation to be formed Cause.

When the upper punch 12 reaches its extreme position, the upper frame 10 can move upward in the direction of the rest position away from the lower frame 11. [ The die cushions 24,25 and die elements 15,16 then automatically return to their spaced apart positions by their respective biasing members. The support member 53 returns to its rest position due to the effect of gravity and drives the levers 55,56 and the contact members 43,44 towards their initial upper position. Furthermore, when the die elements 15,16 return to their spaced apart positions, the cam surface 48 moves the arms 36,37 against each other until the arms 36,37 return to their initial position To the roller (46). ≪ / RTI >

Referring to Figs. 11 and 12, a bending apparatus according to another embodiment is shown. This embodiment differs from the other embodiments described above in that the bending device 9 does not have auxiliary means. However, as in the preceding embodiment, the bending device 9 is provided with contact members 43, 44 having a housing 59 and a roller (not shown) mounted at one end of the lever 55, The levers 55 and 56 are pivoted while the upper punch 12 is moving from the rest position to the bending position.

In an advantageous embodiment, the movement of the contact members is guided so that the contact members move along a defined trajectory in the vertical direction while the upper punch moves from its rest position to the bending position. The respective contact members 43 and 44 are guided by the supporting portion 67 fixed to the lower frame 11, for example, and the lower portion of the contact members 43 and 44 slides with respect thereto.

It should be pointed out that although the bending device 9 described above is capable of forming a corrugation on a single preformed corrugated metal plate, the present invention is by no means limited to such a kind of embodiment. In particular, by arranging the plurality of bending devices 9 described above in the longitudinal direction in order, the wrinkles can be formed on the metal plate having a plurality of parallel preformed wrinkles.

Although the present invention has been described in connection with a number of specific embodiments, it is not intended to be exhaustive or to limit the invention to the precise form disclosed, including all technical equivalents of the described means, The point is obvious.

It should be especially noted that this kind of bending device can equally be used for the formation of the high corrugations of the metal plate. In such a case, the bending device is simplified and does not include the blade, grooves formed in the die elements, and male elements held in the die cushions.

&Quot; comprising ", " comprising ", and their uses do not exclude the presence of elements or steps other than those listed in a claim.

In the claims, any reference signs in parentheses shall not be construed as limiting the claim.

9. Bending device 12. Upper punch
13. Head 14. Finger
15.16. Die element 20. abutment element

Claims (26)

A bending device (9) for forming a corrugation (2) on a metal plate (1) for the construction of a fluid-tight membrane of a fluid storage tank, said bending device (9) comprising:
A lower frame 11;
A lower die having a first die element 15 and a second die element 16 each having a bearing surface 17 for the metal plate 1 and a half imprint 18, Each of the first die element 15 and the second die element 16 is mounted on the lower frame 11 slidably in the x direction so as to slide between a spaced position and a gathered position, 15 of the second die element 16 and the engraved portions 18 and 19 of the half of the second die element 16 are formed in the corrugations 2 and 3 which are to be formed when the first die element 15 and the second die element 16 are in a gathering position A lower die together with an engraved portion corresponding to the shape of the lower die;
An upper punch (12) disposed on a lower die, the upper punch having a lower end provided with a head (13) having a complementary shape to the shape of the stamp, and the upper punch (12) And the head 13 of the upper punch 12 in the bending position is movable vertically with respect to the lower frame 11 by means of an upper punch 12 which meshes with the inside of the engraved portion of the lower die so as to be pressed onto the metal plate 1. [ 12); And
A first die cushion 24 and a second die cushion 25 extending on the respective opposing sides of the upper punch 12 on the lower die and facing the first die element 15 and the second die element 16, , Wherein the first die cushion (24) and the second die cushion (25) are slidably mounted in the x direction between a gathered position and a spaced position, the first die cushion (24) and the second die cushion 25 can move vertically with respect to the lower frame 11 between the unlocked position and the clamping position and wherein the first die cushion 24 and the second die cushion 25 at the clamping position engage the metal plate 1 Which are respectively adjacent to the bearing surfaces 17 of the first die element 15 and the second die element 16 for clamping against the bearing surfaces 17 of the first die element 15 and the second die element 16, A first die cushion 24 and a second die cushion 25,
The bending device (9) further comprises auxiliary means configured to assist in moving the first die element (15) and the second die element (16) to a gathering position, said auxiliary means comprising:
A first arm 36 and a second arm 37 respectively mounted on the lower frame 11 so as to pivot around the respective rotary shafts 39 and 40. Each arm is arranged such that the upper punch 12 is in the rest position A first end portion 41 configured to move while the upper punch 12 is moving from the rest position to the bending position such that the first arm 36 and the second arm 37 are pivoted while moving from the rest position to the bending position, (36) and a second arm (37) having a second end (42) provided with a first arm (46)
The cam followers 46 of the first arm 36 and the second arm 37 act together with the cam surface 48 respectively held by the first die element 15 and the second die element 16 Configured; Each cam follower 46 is pivoted to the first die element 15 during pivotal actuation of the first arm 36 and the second arm 37 driven by the upper punch 12 moving from the rest position to the bending position, Or a force that tends to move the first die element 15 and the second die element 16 to a gathered position in the x direction on the respective cam surface 48 held by the second die element 16, , The cam follower (46) and the cam surface (48) are made so as to apply a force to the bending device. 2. A device according to claim 1, characterized in that the auxiliary means comprise contact members (43, 44), which are mounted on the lower frame (11) The metal plate 1 has a bearing surface 45 between the bearing surface 45 of the contact members 43 and 44 and the upper surface of the upper punch 18, The upper punch 12 and the contact members 43 and 44 move in the direction of the lower frame 11 while the upper punch 12 is moved from the rest position to the bending position; The contact members 43 and 44 are supported with respect to the first end 41 of each of the first arm 36 and the second arm 37 so that the upper punch 12 is moved from the rest position to the bending position, 1 arm 36 and second arm 37 are pivoted. 3. The apparatus according to claim 2, wherein the first end (41) of each of the first arm (36) and the second arm (37) has idler rollers, (9).  Method according to claim 2 or 3, characterized in that the cam surfaces (48) held by the first die element (15) and the second die element (16) The first and second arms 36 and 37 are arranged in the x direction between the first end and the cam follower 46 of the second arm 37, The angle formed between the first vertical axis and the second axis passing through the second end 42 of the arms 36,37 is greater than the angle formed by the upper punch 12 from the rest position to the bending position Each of the cam followers 46 is moved in the direction of the cam surface 48 so that the first arm 36 and the second arm 37 are each made to decrease when the arms 36, To move on the respective cam surface (48) with a force which tends to move said first die element (15) and said second die element (16) to their collecting position. 5. A cam follower according to claim 4 wherein each cam follower (46) having a second end (42) of one of the first arm (36) and the second arm (37) Is received in a groove (47) held by one of the die elements (16) and one of the cam surfaces (48) forms one of the sides of the groove (47). Method according to one of the claims 1 to 5, characterized in that the cam surfaces (48) are mounted on the first die element (15) and the second die element (16) ). 7. A device according to any one of the preceding claims, wherein each cam surface (48) has a profile (66) at its upper portion, the profile of which emanates from the portions (18, 19) , A bending device (9). The bending device (9) according to any one of claims 1 to 7, wherein each of the first and second arms (36, 37, 38) is bent. 9. A device according to any one of claims 1 to 8, wherein each of the cam followers (46) with the first end (36) and the second end of the second arm (37) is an idler roller, Bending device (9). 10. A device according to any one of the claims 1 to 9, characterized in that the auxiliary means further comprises third and fourth arms (38) pivotally mounted about respective axes of rotation, A first end configured to move while the upper punch 12 is moving from the rest position to the bending position such that the third and fourth arms 38 are pivoted while moving from the rest position to the bending position and a second end ; The cam followers of the third and fourth arms 38 move to a position where the first die element 15 and the second die element 16 are gathered while the upper punch 12 moves from the rest position to the bending position Each of which is configured to cooperate with a respective cam surface (48) held by a first die element (15) and a second die element (16) to assist the bending device (9). 11. A method as claimed in claim 10, wherein the first arm (36) and the second arm (38) and, on the other hand, the second arm and the fourth arm (37) (9). ≪ / RTI > 13. A method as claimed in claim 11 or 12, characterized in that the auxiliary means comprises two contact members (43, 44), each contact member being vertically movably mounted on the lower frame (11) By having a bearing surface 45 positioned between the one die element 15 and the half engraved portions 18 and 19 of the second die element 16, the metal plate 1 is supported by the upper punch 12 and And the contact members 43 and 44 are moved in the direction of the lower frame 11 while the upper punch 12 moves from the rest position to the bending position Moving; The two contact members 43 and 44 are connected to the first ends 41 of the first arm 36 and the second arm 37 and to the first ends 41 of the third and fourth arms 38 So that the first arm 36, the second arm 37, the third arm and the fourth arm 38 are pivoted while the upper punch 12 is moved from the rest position to the bending position, 9). The bending device (9) according to claim 12, characterized in that the bending device (9) is for forming the corrugations (2) at right angles to the corrugations (3) previously formed in the metal plate (1)
Two blades 49 and 50 for deforming the preformed corrugation 3 on the respective opposite sides of the intersecting region 5 between the preformed corrugation 3 and the corrugation 2 to be formed, , Two blades (49, 50) movably mounted between a lower position on the lower frame (11) and an upper position for bending a preformed corrugation; And
Move between the contact members 43 and 44 and the blades 49 and 50 so that the blades 49 and 50 move to the upper position for bending while the upper punch 12 moves from the rest position to the bending position. Further comprising: a device for blade operation, the device having a motion transfer mechanism configured to transmit a force to the bending device (9). 14. The apparatus of claim 13, wherein the blades (49, 50) are each mounted on the support member (53) to slide in the x direction between a spaced position and a gathered position; The support member 53 is mounted on the lower frame 11 so as to be vertically movable; The apparatus for the operation of the blades has two levers 55 and 56 and each of the levers is mounted on the lower frame 11 and articulated relative to the lower frame 11, (57) which cooperates with one or the other of the two contact members (43, 44) to drive the pivoting action of the levers (55, 56) while the lever (12) moves from the rest position to the bending position, And a second end (60); The second end 60 of the levers 55,56 cooperates with the support member 53 to move the support member 53 vertically and thus move the upper punch 12 from the rest position to the bending position To move the blades (49, 50) from a lower position to an upper position for bending during the pivoting action of the levers (55, 56). Method of using a bending device (9) according to any of the claims 1 to 15, characterized in that the metal plate (9) is mounted on the bearing surface (17) of the first die element (15) and the second die element To be supported relative to each other; And
Moving the upper punch (12) from the rest position to the bending position to form the pleats (2) on the metal plate (1). A bending device (9) for forming a corrugation (2) on a metal plate (1) for the construction of a fluid-tight membrane of a fluid storage tank, the corrugation being to be formed comprises a corrugation (3) , And the bending device (9) comprises:
A lower frame 11;
A lower die configured to form an imprint corresponding to the shape of the crease 2 to be formed;
An upper punch (12) disposed on a lower die, the upper punch having a lower end provided with a head (13) having a shape complementary to the shape of the stamp, the upper punch (12) The head 13 of the upper punch 12 being movable vertically with respect to the frame 11 and at the bending position being pivotable about an upper punch 12 );
Two blades 49 and 50 for deforming the preformed corrugation 3 at the respective opposite sides of the crossing region 5 between the preformed corrugation 3 and the corrugation 2 to be formed, Two blades 49, 50 mounted on the lower frame 11 so as to be movable between a position and an upper position for bending the preformed corrugation; And
An operating device of the blade, the operating device of the blade comprising:
At least one contact member (43,44) mounted on the lower frame so as to be vertically movable, by having a bearing surface (45) located inside the engraved portion of the lower die, the metal plate (1) 43 and 44 of the lower frame 11 and the upper punch 12 of the lower frame 11 while the upper punch 12 is moved from the rest position to the bending position, At least one contact member (43, 44) moving in the direction of the arrow; And
To transfer the movement between the contact members 43 and 44 and the blades 49 and 50 so that the blades 49 and 50 move toward the upper position for bending while the upper punch 12 moves from the rest position to the bending position A motion transmission mechanism comprising a motion transmission mechanism having at least one lever (55,56), the at least one lever being mounted on a lower frame (11) And is movably mounted within the housing 59 formed in the contact members 43 and 44 for driving the pivoting action of the levers 55 and 56 while the upper punch 12 is moving from the rest position to the bending position. (9) having a first end that is substantially perpendicular to the first axis. The bending device (9) according to claim 16, wherein the first end of the lever (55, 56) is provided with a roller mounted in a housing (59) movably in the contact member (43, 44). 18. A device according to claim 16 or 17, comprising two contact members (43,44), each contact member being mounted on the lower frame so as to be vertically movable and having a bearing surface The metal plate 1 is pinched between the upper punch 12 and the bearing surface 45 of each of the contact members 43 and 44 so that the contact members 43 and 44, Move in the direction of the lower frame (11) while the upper punch (12) moves from the rest position to the bending position; The movement transfer mechanism has two levers 55 and 56 which are respectively mounted on the lower frame 11 and articulated with respect to the lower frame so that the upper punch 12 moves from the rest position to the bending position Having a first end mounted to a housing (59) formed on one or the other of the contact members (43,44) so as to be able to move to drive the pivoting action of the levers (55,56). 19. A bending device (9) according to claim 18, wherein the levers (55,56) are mounted pivotally about horizontal rotation axes oriented in a direction transverse to the longitudinal direction of the crease to be formed. 20. A bending device according to any one of claims 16 to 19, further comprising an abutment mechanism configured to stop movement of the contact members (43, 44) in the direction of the lower frame (11) ). 21. A device according to any one of claims 16 to 20, characterized in that at the first end (57) of the lever (55, 56) or the respective lever (55, 56) Wherein the geometric shaft (63) is movable in at least one groove formed in a wall of a contact member (43, 44) constituting a side of the housing (59). 22. A device according to any one of claims 20 and 21, wherein the geometric shaft (63) is arranged at the end of the groove to form an abutment mechanism adapted to stop the movement of the contact members (43,44) in the direction of the lower frame (9). ≪ / RTI > 23. The apparatus according to any one of claims 16 to 22, wherein the blades (49, 50) are mounted on a support member (53), respectively, and are slidable in a direction transverse to the longitudinal direction of the wrinkles to be formed between the spaced- under; The support member 53 is mounted on the lower frame 11 so as to move vertically; The levers 55, 56 or each lever has a second end; The second ends of the levers 55,56 act together with the support members 53 to vertically move the support members and thus the levers 55,56, which are driven by the movement of the upper punch 12 from the rest position to the bending position, 56) move the blades (49, 50) from a lower position to an upper position for bending. Method according to any of claims 16 to 23, characterized in that the lower die comprises a first die element (15) and a second die element (16), each die element bearing surface for a metal plate 17 and a concave half engraved portion 18,19, the first die element 15 and the second die element 16 being slidable in the x-direction so as to be able to slide between the spaced position and the gathered position, And the engraved portions 18 and 19 of the first die element 15 and the second die element 16 are respectively mounted on the first die element 15 and the second die element 16 And the engaging portion corresponding to the shape of the crease portion (2) to be formed is formed together when the engaging portion (2) is in the collecting position. A method as claimed in claim 24, characterized in that the bearing surfaces (45) of the contact members (43,44) or of the respective contact members (43,44) are such that when the upper punch (12) 2 is at the same height as the bearing surface (17) of the die element (16). 26. A method of using a bending device (9) according to any one of claims 16 to 25,
Positioning the metal plate (1) to be supported against the lower die; And
In order to form the corrugations 2 on the metal plate 1,
Moving the upper punch (12) from the rest position to the bending position to move the blades (49, 50) from the lower position to an upper position for bending the preformed wrinkle.

Images