JP2021505400A - Equipment and related methods for sequential stamping by magnetic molding - Google Patents

Abstract

The present invention relates to a device for stamping a blank (50) to manufacture a stamping component. The device includes: a punch (40) with a contact surface (41); anvil (70); a die (80); a magnetic field generating means (60) disposed on the contact surface within the punch. In the initial position: the contact surface of the punch receives a portion of the first surface of the blank; the anvil and the magnetic field generating means are on each side of the same portion of the blank. The magnetic field generating means faces the first surface (51), and the anvil (70) is placed on the second surface (52) of the blank (50) from the second surface. Face-to-face at some distance; the die (80) is configured to face the second face (52) in another portion of the blank. The magnetic field generating means is configured to apply pressure in the direction Z'Z in the direction of the anvil with respect to the blank. The device includes a first means (43) for moving the punch in the direction Z'Z and a second means (72) for moving the anvil in the same direction. [Selection diagram] Fig. 1

Description

The present invention belongs to the field of molding, more specifically stamping.

The present invention relates to an apparatus and method for stamping a blank with a magnetic pulse in order to manufacture a stamping component, particularly a component called a deep drawing stamping component.

In the field of molding, especially metal molding, stamping is a method of choice because of its robustness and good control.

Stamping is generally used in the manufacturing industry, especially in the automobile manufacturing industry, due to its high acceptable production rate, especially for forming trim panels such as hoods or doors of motor vehicles.

Stamping is a molding method that consists of obtaining parts with a somewhat complex shape by plastic deformation of the blank under the action of pressure.

The stamping device for implementing this method basically consists of a die and a punch having a substantially complementary shape in which a blank is positioned between them. The above shape is obtained by pushing the blank into the die by the action of a punch. The movement of the blank is generally controlled by the blank holder, which reduces the appearance of wrinkles or cracks on the final stamping component by applying holding pressure to the blank.

However, it has been found that it is difficult to select the mold clamping force to be applied to the blank holder when there are parts that are difficult to mold, especially deep drawing stamping parts. If the force of the blank holder is too strong, wrinkles will be removed but the risk of cracking is high. If the force of the blank holder is too weak, the risk of wrinkles is high.

Alternative methods of the stamping method are known for manufacturing deep drawn stamping parts.

Among them, a hydraulic molding method can be mentioned. In this method, the blank is formed by the action of a pressurized fluid.

The relevant hydraulic molding apparatus consists of a two-part sealed enclosure, including a hollow mold with recesses that complement the shape of the part to be obtained. The blank is placed inside the enclosure. The hydraulic pressure is applied to the blank and presses the blank into the recess of the mold. This quasi-static molding method has the major advantage of eliminating punching and, in particular, the generation of complex shapes that are undercuts. However, high pressure is essential for molding, which tends to require a large tonnage of pressure on large parts. Therefore, this method is mainly used for molding tubular parts. One of the drawbacks of this method is the cycle time, often tens of seconds, due to filling and pressurizing times.

Among the existing hydraulic molding methods, a submerged discharge molding method (Electro Hydraulic Forming method) known as an EHF method can be mentioned, which is a high-speed deformation method. Such a method has a number of advantages, especially a significant reduction in the elastic return of the metal and the increase in formability. However, the main drawbacks are the need to bring the part to be molded into contact with water (potential corrosion and essential drying) and water management.

Hot molding methods such as a superplastic forming method known as SPF can also be mentioned. This method is based on the ability of some alloys, such as titanium, to withstand significant deformation. Whereas traditional alloys generally deform only within the typical range of a few percent to 50%, these alloys, hereinafter referred to as superplastic alloys, are sometimes referred to under certain conditions of temperature, pressure, and deformation. So, the growth can reach more than 1000%.

The relevant SPF molding apparatus consists of a two-part sealed enclosure containing a hollow mold with recesses complementary to the final external geometry of the part to be obtained. The blank is placed inside the enclosure and is fixedly held between the two parts. Pressurized gas is injected into the enclosure, deforming the blank and pressing it into the recess. Pressure and temperature (about 900 ° C for titanium alloys) need to be perfectly controlled.

The obvious drawbacks associated with this SPF forming apparatus and related methods are the cycle time, cost, and the fact that only a few materials can be used.

An object of the present invention is, in particular, to overcome all or part of the limitations of the prior art solutions mentioned above, in particular by proposing solutions that allow stamping components, especially deep drawing stamping components. That is.

To this end, the present invention primarily aims at an apparatus for stamping blanks for manufacturing stamping parts, wherein the apparatus is:
-Punch including contact surface;
-Anvil;
-Die;
-In the punch, the magnetic field generating means arranged on the contact surface is included.

The term "blank" means a thin plate, especially made of metallic material. A plate is said to be thin if one of its dimensions is significantly smaller than the other two, typically at least an order of magnitude smaller in size.

In the initial position, i.e. before the stamping stage, the stamping device is:
-The contact surface of the punch is formed to accept a portion of the first surface of the blank;
-The anvil and the magnetic field generating means are configured to be arranged on each side of the same portion of the blank.

The magnetic field generating means faces the first surface. The anvil faces the second surface of the blank on the opposite side of the first surface by a certain distance from the second surface. The die is formed so as to face the second surface in another portion of the blank.

The magnetic field generating means is formed so as to apply pressure in the direction Z'Z in the direction of the anvil with respect to the blank, and is configured for this purpose.

The stamping device includes a first displacement means arranged to displace the punch in the direction Z'Z with respect to the die. The punch is advantageously displaced in translation.

The stamping device includes a second displacement means arranged to displace the anvil with respect to the die in the direction Z'Z.

The punch, the anvil, and the die are preferably made of a metallic material to withstand the high pressure generated by the magnetic field generating means.

The stamping device according to the present invention differs from the conventional stamping device in that stamping is performed by the magnetic field generating means, not by the punch itself.

Similarly, the magnetic field generating means is used differently from the conventional framework of the magnetic molding method which simultaneously forms the entire blank. The magnetic field generating means is arranged so as to generate a magnetic pulse only for a part of the blank. The relative displacement of the punch with respect to the generating means allows displacement of the blank region that will be affected by the magnetic pulse.

Therefore, such a device advantageously provides a radius of curvature of less than 2 mm, fine engraving or tight tolerances, and avoids cracking or cracking of the material in areas of high elongation, especially in the case of aluminum. Due to the advantages that magnetic molding can bring, such as, it can operate in high speed expansion and deformation.

Therefore, such stamping devices are particularly adapted for manufacturing stamping components, especially deep drawing stamping components, without creating cracks in the components.

The stamping device is also adapted for making flanged edges due to the advantages of magnetic molding described above.

According to the preferred embodiments, the invention also satisfies the following features, which are implemented separately or in each combination of technical actions.

According to a plurality of preferred embodiments, the first displacement means includes a linear actuator.

According to a plurality of preferred embodiments, in order to obtain good efficiency of the above method, the magnetic field generating means is, for example, in the form of a spiral planar coil. The coil is arranged on a plane substantially parallel to the contact surface of the punch.

According to a plurality of preferred embodiments, the stamping device holds the other portion of the blank against the die in order to limit the formation of wrinkles, and the holding pressure on the movement of the blank with respect to the die. Includes a blank holder configured to grant.

The present invention also relates to a method for stamping a blank with a magnetic pulse in order to manufacture a stamping component by a stamping device according to at least one of its embodiments. The above method is the following step:
a) The step of positioning the blank in the stamping device;
b) The step of applying pressure to the first surface of the blank in the direction Z'Z by exposing the blank to a magnetic field generated by the magnetic field generating means, and pressing the blank anvil;
c) Including the step of displacing the punch by the first displacement means and the anvil by the second displacement means in the direction ZZ with respect to the die.
Steps b) and c) are preferably repeated synchronously until the desired shape for the finished stamping part is obtained.

Synchronous means that the steps are performed continuously, sequentially, or simultaneously.

As the punch is displaced, a magnetic pulse is generated by the magnetic field generating means, which, on the one hand, applies axial pressure to the blank in the direction of the anvil and presses the blank against the anvil. On the other hand, a radial pressure is applied to the blank in the direction of the die to press the blank against the die.

This dual axial and radial pressure can advantageously deform the blank with excellent molding accuracy without the risk of cracking the resulting component.

The present invention is given as a non-limiting example and will be better understood by reading the following description made with reference to the following drawings.

1 to 4 are schematic cross-sectional views of an embodiment of the stamping apparatus according to the present invention, showing continuous steps of stamping a blank. FIG. 6 is a schematic cross-sectional view of an embodiment of the stamping device according to the invention, showing a series of steps for stamping a blank. FIG. 6 is a schematic cross-sectional view of an embodiment of the stamping device according to the invention, showing a series of steps for stamping a blank. FIG. 6 is a schematic cross-sectional view of an embodiment of the stamping device according to the invention, showing a series of steps for stamping a blank. FIG. 5 is a schematic diagram similar to FIG. 1 showing a specific embodiment of the stamping device having a blank holder.

In these figures, the same reference numerals from one figure to another refer to the same or similar elements. For clarity, the elements shown are not at exact scale unless otherwise stated.

As shown in FIGS. 1 to 4, the stamping device 10 is formed so as to stamp the blank 50 in order to manufacture a stamping component, particularly a deep drawing stamping component.

In one exemplary embodiment, the blank 50 is made of a metallic material such as steel.

The blank 50 has a first surface 51 and a second surface 52 opposite the first surface 51.

In a preferred non-limiting embodiment of the present invention, the stamping device 10 shown in sectional views in FIGS. 1 to 4 is adapted for manufacturing a bucket. Bucket means a hollow cylindrical stamping component with or without a flanged rim.

It will be readily understood that the teachings of the present invention can be applied to other embodiments.

In this description, terms such as "upper", "lower", "high", "low", left "left", and "right" are simplified. Is used for the orientation of the various elements presented in FIGS. 1-4. However, unless otherwise indicated, these terms only describe the relative placement of these elements after any virtual rotation of the assembly into a viable orientation in space. is there.

The stamping device 10 includes a first frame 20 and a second frame 30. As shown, the first frame 20 may be the lower part of the stamping device and the second frame 30 may be the upper part. Alternatively, without departing from the scope of the present invention, the first frame 20 may be the upper, left or right portion of the stamping device, and the second frame 30 may be the lower, right portion in each case. Or it may be the left part.

First Frame The first frame 20 is in the form of a first hollow body that preferably defines the range of the first open cavity 23 in the center.

In certain embodiments, the first open cavity 23 preferably has a cylindrical shape with a circular cross section.

As shown in FIGS. 1 to 4, the first hollow body is formed of a lower portion 21 and a side portion 22, and an inner wall 221 thereof defines a range of the first open cavity 23.

The punch 40 is arranged in the first open cavity 23.

In a particular example where the desired final stamping component is a bucket, the punch 40 is preferably in the shape of a cylinder with a circular cross section and longitudinal axis Z'Z.

In the examples of FIGS. 1 to 4, the longitudinal axis of the punch 40 is a vertical axis, preferably coincident with the longitudinal axis of the first open cavity 23.

The punch 40 is preferably solid and is made of a material that can withstand the high pressures produced by the magnetic field generating means, such as a metallic material.

The punch includes a contact surface 41 and a side surface 42. The contact surface 41 is formed to accept a portion of the blank that will be stamped. The side surface 42 is formed so as to face the inner wall 221 of the side portion 22 of the first hollow body when the punch is positioned in the first open cavity 23.

The punch 40 is movable in the first open cavity 23. The punch 40 is along its longitudinal axis Z'Z.
-The retracted position where the punch is placed in the first open cavity 23,
-Translation is possible between the punch and the unfolding position located outside the first open cavity 23.

The punch 40 is displaced to its unfolded position in direction Z'Z. The punch 40 is displaced toward its receding position in direction ZZ'.

In the example of FIG. 4, the punch 40 is shown in the unfolded position.

The first displacement means 43 is configured to displace the punch 40 between the retracted position and the deployed position. The first displacement means 43 is manually or automatically operated.

In certain exemplary embodiments, the first displacement means 43 includes at least one linear, hydraulic or pneumatic actuator, such as a cylinder operating between the first frame 20 and the punch 40. In this exemplary embodiment, preferably the fixed portion of the linear actuator (eg, the cylinder body) is housed in a first open cavity 23 formed in a first frame 20. The moving parts of the linear actuator, such as the cylinder piston, can be displaced out of the first open cavity 23 to deploy the punch 40 in the direction ZZ, and the direction ZZ to return the punch 40 to its retracted position. 'Can be displaced towards the first open cavity 23. In a particularly advantageous mode, the control means controls the first means 43 to displace the punch.

In one modification, the first displacement means 43 is in the form of a support that supports a thrust screw that can work with the punch 40 to laterally displace the punch 40 along the longitudinal axis ZZ. ..

The stamping device 10 also includes a magnetic field generating means 60.

The magnetic field generating means 60 is arranged on the contact surface 41 of the punch 40 inside the punch.

The magnetic field generating means 60 is configured to generate a concentrated magnetic field over a very short period of time in a defined space, as will be described later.

In one preferred exemplary embodiment, the magnetic field generating means 60 is, for example, in the form of a spiral planar coil. The flat coil is preferably arranged on a surface substantially parallel to the contact surface 41 of the punch 40.

The magnetic field generating means 60 preferably forms an integral part of the assembly further comprising an electrical energy storage unit and one or more switches (not shown).

The electric energy storage unit is configured to store an appropriate amount of energy, for example, about several kilojoules to several tens of kilojoules (kJ), and is formed to store the above-mentioned energy.

In one preferred exemplary embodiment, the storage unit is a battery of discharge capacitors.

Second Frame The second frame 30 is in the form of a second hollow body that defines the range of the second open cavity 33.

In certain embodiments, the second open cavity 33 preferably has a cylindrical shape with a circular cross section.

As shown in FIGS. 1 to 4, the second hollow body is formed by the upper portion 31 and the side portion 32, and the inner wall 321 thereof defines the range of the second open cavity 33.

The second frame 30 is such that the second open cavity 33 accepts the punch 40 when the punch 40 is displaced in the direction ZZ along its longitudinal axis ZZ to its unfolded position. It is arranged with respect to the first frame 20 so as to be. The free end 322 of the side portion 32 of the hollow body of the second frame 30 substantially faces the free end 222 of the side portion 22 of the first hollow body of the first frame 20.

In the second hollow body and the punch 40, the punch 40 can be freely translated and displaced in the second open cavity 33 so that the thickness of the blank 50 is increased to the inner wall 321 of the second open cavity 33 and the punch 40. It has dimensions so that it can pass between the side surface 42 and the side surface 42.

In one preferred embodiment, the side surface 42 of the punch 40 and the side wall 32 of the second hollow cavity 33 have a substantially complementary shape, except for the thickness of the final stamping component and the clearance for operation.

In one non-limiting embodiment, if the punch 40 is in the shape of a cylinder with a circular cross section, the second open cavity 33 is a cylinder with a circular cross section that is larger in diameter than the outer diameter of the punch.

In the examples of FIGS. 1 to 4, preferably, the longitudinal axis of the second open cavity 33 coincides with the longitudinal axis of the punch 40.

The stamping device further includes an anvil 70.

The anvil 70 is housed in a second open cavity 33. The anvil is movable in the second open cavity 33. The anvil can be translated along the longitudinal axis Z'Z. The second displacement means 72 is configured to laterally displace the anvil 70 within the second open cavity 33.

The second displacement means 72 is manually or automatically operated.

In one exemplary embodiment, the second displacement means 72 includes at least one linear, hydraulic or pneumatic actuator, such as a cylinder operating between the second frame 30 and the anvil 70. In this exemplary embodiment, preferably the fixed portion of the linear actuator (eg, the cylinder body) is housed in a second open cavity 33. A moving part of the linear actuator, such as a cylinder piston, can be displaced in the second open cavity 23, thereby displaces the anvil 70 in the second cavity. In a particularly advantageous mode, the control means controls the second displacement means 72 of the anvil 70.

In one modification, the second displacement means 72 is in the form of a support that supports a thrust screw that can work with the anvil to laterally displace the anvil 70 along axis ZZ'.

In one preferred embodiment, the first displacement means 43 and the second displacement means 72 are similar.

The stamping device further includes a die 80.

The die 80 is arranged at the free end 322 of the side portion 32 of the second frame 30. The free end 322 of the side portion 32 of the second frame 30 forms the lower surface 81 of the die 80.

In one preferred embodiment, the side portion 32 of the second hollow body of the second frame 30 forms the die 80.

The anvil 70 and die 80 are preferably made of a metal material, such as steel, having sufficient structural strength to withstand the high pressure generated by the impact of the blank 50 on the anvil and die during the stamping method described below. To.

The punch 40, the anvil 70, the die 80 and the magnetic field generating means 60 are such that the blank 50 is positioned flat among the various elements described above at the initial position of the stamping device 10 (FIG. 1), i.e. before the start of the stamping method. Are placed against each other.

More specifically, the punch 40 is positioned so that its contact surface 41 receives a portion of the first surface 51 of the blank 50 at the retracted or intermediate position of the punch. .. In the example shown in FIG. 1, the contact surface 41 of the blank is formed so as to receive the central portion of the first surface 51 of the blank 50. The anvil 70 and the magnetic field generating means 60 are arranged on each side of the same portion of the blank 50. The magnetic field generating means 60 faces the first surface 51 of the blank 50. The lower surface 71 of the anvil 70 faces the second surface 52 of the blank 50.

The lower surface 71 of the anvil 70 is located on the other side of the blank, opposite to the second surface 52 of the blank 50. In the example shown in FIG. 1, the lower surface 81 of the die 80 is arranged on the peripheral edge of the blank on the opposite side of the second surface 52 of the blank 50.

The lower surface 71 of the anvil 70 is arranged at a distance from the second surface 52 of the blank 50.

Preferably, as shown in FIG. 1, the magnetic field generating means 60 thus remains positioned in the direction ZZ with respect to the blank 50, mainly in the direction of the lower surface 71 of the anvil 70. Pressure can be applied and is configured to apply pressure.

In one embodiment, as shown in FIG. 5, the stamping device 10 includes a blank holder 90. The blank holder 90 is stored between the free end 222 of the side portion 22 of the first hollow body and the free end 322 of the side portion 32 of the second hollow body. The blank holder 90 is such that when the blank is in a predetermined position on the punch 40, the blank is compressed between the blank holder and the die at the free end 322 of the side portion 32 of the second hollow body. , Consists of. Adjusting the force of the blank holder and / or adjusting the clearance between the blank holder and the die adjusts the wrapping of the blank during molding of the blank by preventing or limiting the formation of wrinkles.

In one exemplary embodiment, the blank holder 90 is pressed and held against the free end 322 of the side portion 32 of the second frame 30 by a compression means such as a gas spring.

From this, an example of the stamping method will be described.

The blank 50 is formed to fit the shape of the lower surface 71 of the anvil 70 and the inner wall 321 of the side 32 of the second frame 30 to form a bucket type deep drawing stamping. The resulting bucket may or may not include a flanged rim.

In the pre-step, the blank 50 is cut from the sheet to the desired dimensions (length and width, or diameter, and thickness).

In a first step called step a), the blank 50 is positioned within the stamping device 10.

As shown in FIG. 1, the substantially flat shaped blank 50 is positioned between the first frame 20 and the second frame 30.

In one embodiment, the blank 50, on the one hand, is placed on the punch 40 in its central portion. The blank 50 is arranged so that its first surface 51 abuts on the abutting surface 41 of the punch.

The blank 50 is arranged so that its second surface 52 faces the lower surface 71 of the anvil 70. The lower surface 71 of the anvil 70 is positioned at a distance e from the second surface 52 of the blank 50.

The distance e defines the desired depth for deformation of the blank at each drive (discussed below). By maximizing the distance e, the number of times of driving is reduced, and as a result, the molding time is reduced.

The blank 50, on the other hand, is located at its peripheral edge between the lower surface 81 of the die 80, and thus the free end 322 of the side 32 of the second frame 30 and the free end 222 of the side 22 of the first frame 20. Be placed. The second surface 52 of the blank 50 faces the die 80 at a distance from the die 80. The first surface 51 of the blank 50 is arranged to face the free end 222 of the side portion 22 of the first frame 20.

In one exemplary implementation, when the blank 50 is placed on the punch 40, the punch is laterally displaced from its receding position along direction ZZ to shift the blank 50 to the periphery of the blank. The second surface 52 of the blank in the portion is arranged in the immediate vicinity (for example, about 1 mm) of the second frame 30, and thus the free end 322 of the side portion 32 of the lower surface 81 of the die 80.

When the stamping device 10 includes the blank holder 90, the blank 50 is held by the blank holder in a state of being in contact with the free end 322 of the side portion 32 of the second frame 30.

The method subsequently comprises a second step called step b) in which the blank 50 is deformed by magnetic molding.

The central portion of the blank 50 arranged in the vicinity of the magnetic field generating means 60 is exposed to the magnetic field generated from the magnetic field generating means 60, whereby the axial pressure is applied to the first surface 51 of the blank 50. Then, the blank is strongly pressed against the lower surface 71 of the anvil 70. The arrows shown in FIG. 2 indicate the axial pressure applied to the blank 50.

As a result, the blank 50 is deformed and comes into contact with the lower surface 71 of the anvil 70.

During this step b) shown in FIG. 2, the magnetic field generating means 60 gradually deforms the central portion of the blank 50 to obtain a first stamp having a depth P1 smaller than the required final stamp depth P. .. The peripheral edge is pressed against the free end 322 of the side 32 of the second frame 30 and thus against the lower surface 81 of the die 80.

The anvil 70 advantageously makes it possible to limit the impact of driving into the blank and prevent the blank from cracking.

At the end of step b), the blank 50 is deformed to have a first stamp.

In a third step called step c), the punch 40 and the anvil 70 are displaced.

The punch 40 is displaced in the direction Z'Z by the first displacement means 43 until the contact surface 41 of the punch is pressed again against the first surface 51 of the blank 50, whereby the central portion of the blank 50 is magnetically fielded. It returns to the immediate vicinity of the generation means 60. As shown in FIG. 3, the peripheral edge of the blank 50 is held at a distance from the die 80.

The displacement of the punch 40 is carried out in the same direction as the displacement of the central portion of the blank 50 in step b).

The anvil 70 is displaced in the direction Z'Z by the second displacement means 72.

In one exemplary implementation, the relative displacements of the punch 40 and the anvil 70 with respect to the die 80 are carried out sequentially, preferably at the same time.

The displacement of the punch 40 and the displacement of the anvil 70 are not necessarily the same amount.

The anvil 70 is displaced in the direction Z'Z by a sufficient distance, which defines the desired depth for sequential deformation of the blank.

In one exemplary implementation, the punch 40 and anvil 70 relative displacements are performed continuously. The molding of the blank 50 by the magnetic field generating means 60 is considered to be instantaneous with respect to the displacement of the punch 40 and the displacement of the anvil 70. In fact, the duration of the displacement of the punch 40 and the duration of the displacement of the anvil 70 are generally much longer (about 1 second) than the duration of the magnetic pulse generated by the magnetic field generating means 60 (about a few microseconds). ). In a particular case of this embodiment, the second and third steps are performed simultaneously without changing the results of the steps.

In the fourth step, steps b) and c) are sequentially repeated.

Steps b) and c) are repeated until the final stamping component depth P to be obtained is obtained.

As the punch 40 and the anvil 70 are displaced relative to the die 80, the magnetic field generating means 60 advantageously applies axial pressure in the direction of the anvil 70 to the center of the blank 50 to create the blank. Press the central part of the above against the above anvil. The magnetic field generating means 60 also applies a radial pressure in the direction of the die 80 toward the inner wall 321 of the side portion 32 of the second frame 30 to the blank 50 to press the blank against the inner wall. The horizontal arrows shown in FIGS. 3 and 4 indicate the direction of the radial pressure applied to the blank 50. This radial pressure of the blank 50 against the inner wall 321 of the side 32 of the second frame 30 can advantageously allow the blank to perfectly match the shape of the inner wall.

The number of iterations of steps b) and c) depends in particular on the desired depth of the material and stamping parts that make up the blank.

At the end of the stamping method, the blank became a bucket type deep drawing stamping component with or without a flanged rim.

In the example of FIG. 4, the bucket is of a bucket type without a flanged rim.

The present invention is not limited to the preferred embodiments described above as non-limiting examples and the above-mentioned modifications. The present invention also relates to a modified embodiment conceived by those skilled in the art.

The above description clearly shows that the various features and advantages of the present invention achieve the objectives set by the present invention. In particular, the present invention provides a stamping device adapted for manufacturing stamping components, especially deep drawing stamping components, without creating wrinkles or cracks in the components. With such a stamping device and related stamping methods, the part can be machined at high speed and the blank can be deformed with excellent molding accuracy without the risk of cracking the part which would be advantageous.

The present invention also advantageously allows the manufacture of flanged edges.

Claims (5)

A blank (50) stamping device (10) for manufacturing stamping components, wherein the device is:
-Punch (40) including the contact surface (41);
-Anvil (70);
-Die (80);
-In the punch (40), the magnetic field generating means (60) arranged on the contact surface (41).
Including
The stamping device is in the initial position:
-The contact surface (41) of the punch (40) is formed to accept a portion of the first surface (51) of the blank (50);
-The anvil (70) and the magnetic field generating means (60) are formed so as to be arranged on each side of the same portion of the blank (50);
-The magnetic field generating means (60) faces the first surface (51), and the anvil (70) is the second of the blank (50) on the opposite side of the first surface (51). Face the surface (52) at a distance from the second surface;
-The die (80) is formed so as to be arranged to face the second surface (52) in another portion of the blank (50);
-The magnetic field generating means (60) is configured to be formed so as to apply pressure in the direction ZZ in the direction of the anvil (70) with respect to the blank (50).
The stamping device displaces the first displacement means (43) and the anvil (70) arranged so as to displace the punch (40) with respect to the die (80) in the direction Z'Z. A device (10) including a second displacement means (72) arranged to displace in the direction ZZ with respect to (80). The stamping device (10) according to claim 1, wherein the first displacement means (43) includes a linear actuator. The stamping device (10) according to claim 1 or 2, wherein the magnetic field generating means (60) is in the form of a planar coil. The stamping apparatus (10) according to any one of claims 1 to 3, comprising a blank holder (90) configured to hold the other portion of the blank (50) against the die. A method for stamping a blank (50) with a magnetic pulse in order to manufacture a stamping component by the stamping device (10) according to any one of claims 1 to 4, wherein the method is as follows. Step:
a) A step of positioning the blank (50) in the stamping device (10);
b) By exposing the blank (50) to the magnetic field generated by the magnetic field generating means (60), pressure is applied to the first surface (52) of the blank (50) in the direction Z'Z, said. Steps to press the blank against the anvil (70);
c) A step of displacing the punch (40) by the first displacement means (43) and the anvil (70) by the second displacement means (72) in the direction Z'Z with respect to the die (80). Including
The steps b) and c) are repeated until the desired shape for the stamping part of the finished product is obtained.

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