KR101282753B1 - Incremental sheet forming apparatus with flying die restricted by magnetic force - Google Patents

Abstract

The present invention relates to a sheet forming apparatus having a self-contained flying die, and in particular, a flying die which can be freely moved on one side of a plate to be formed; A punch provided on the other side of the plate; A punch supporter for supporting the punch; A punch driving part provided in the punch supporting part to perform molding by relatively moving the punch toward the plate; And a die constraining portion for constraining the position of the flying die by a magnetic force such that the flying die is positioned corresponding to the punch with the plate interposed therebetween.
As a result, since the die can be fixed and moved by magnetic force without any mechanical support or driving, the molding cost can be reduced by simplifying the configuration of the sheet forming apparatus.
In addition, according to the type of product and the purpose of molding, it is only necessary to replace the flying die and seat it on a plate, so not only is the molding work simple, but also its application can be maximized from small to medium sized products to large products. In addition, it is possible to pressurize the compressive residual stress to improve the formability, thereby improving the usability.

Description

Plate forming apparatus having a magnetically bound flying die {INCREMENTAL SHEET FORMING APPARATUS WITH FLYING DIE RESTRICTED BY MAGNETIC FORCE}

The present invention relates to a sheet forming apparatus, and in particular, by restraining the relative position of the flying die by magnetic force, a separate mechanical support or driving for the die is unnecessary, simplifying the configuration, and hitting the punch through the punch driver. The present invention relates to a sheet forming apparatus having a self-contained flying die which vibrates to improve usability such as bending forming and non-forming pressing for compressive residual stress.

In general, a plate forming method is most commonly used a matching die forming method of putting a plate between a pair of male and female molds and pressing the mold.

However, the matching die molding method is difficult to manufacture and modify the mold, and the mold must be changed from time to time according to the product, and the precision decreases gradually due to the wear of the mold during repeated use. There is a problem that this takes.

Therefore, economical and flexible manufacturing technology that can replace the metal processing industry using the existing mold has been continuously developed.

An example is a scalable system that can respond quickly to various products. A typical molding technology based on such a scalable system is incremental forming technology.

Progressive molding technology produces a metal product of a desired shape by rotating or transferring the material and the tool, respectively, to partially contact the material and the tool, thereby locally forming the material, and gradually proceeding to the area of the material to be molded. Technology.

Unlike the conventional molding process that requires punch and die, such progressive molding technology basically forms a product by driving principle such as CNC lathe or machining center by numerical control method using CAD data and program.

Therefore, the above-mentioned incremental molding technology is easy to modify the product design process through the digital process using IT technology, and also due to the feature of imposing local deformation on the material and the characteristics of the molding technology using low energy, low space, low cost, It is an efficient molding technology that can realize low noise and low vibration.

In particular, it is possible to overcome the limit of elongation of the material can be applied to the difficult molding material can be usefully applied to the production of micro-parts, not only suitable for the manufacture of very large parts difficult to manufacture molds, and other various fields Applicable at

Looking more closely at this progressive molding technology, there is a method of transforming a rotating material with a smooth hemi-spherical tool called Single Point Incremental Forming (SPIF) to process it into an axisymmetric part. On the other hand, CNC progressive forming corresponding to non-axisymmetric SPIF is a method using a computer numerical control machine tool, such as milling, such that the tool follows a contour with a different depth as shown in FIG. In non-axisymmetric SPIF, the metal plate is fixed and the tool is rotated to form the material.

On the other hand, two point incremental forming (TPIF: Positive IF) for processing a complex shape, as shown in Figure 9, using two tools, one is fixed and the other is moved to form a plate do.

In addition, as shown in FIG. 10, a kinematic incremental sheet metal forming (KISF) method using a kinematic die controlled separately from a main tool to improve process flexibility and shape accuracy. Also recently studied.

However, the above-mentioned one-point incremental molding (SPIF) has the advantage that the molding cost is low because there is no additional tooling cost, but it is impossible to produce parts with sharp edges, and there is a limit in formability due to the large deviation between the required shape and the produced shape. There is a disadvantage.

In addition, the advantage gradual molding (TPIF) can improve the formability than the one-point gradual molding (SPIF), but there is a disadvantage that it takes a lot of molding cost and time because the entire mandrel must be manufactured.

In the case of the moving advantage progressive molding (KISF), both the tool (Main too) and the moving die (Kinematic Die) must be driven by a robot capable of driving more than three degrees of freedom, respectively, so that the molding apparatus is complicated and the manufacturing cost is increased. In addition to the increase, since the space for driving the two robots is required, there is a problem in that the usability of the work space is lowered and it is difficult to be applied to plate materials of various sizes and shapes.

Accordingly, an object of the present invention is to provide a sheet forming apparatus having a self-contained flying die which can fix and move a die without any mechanical support or drive by restraining the position of the die in response to a punch by magnetic force. .

In addition, the present invention is to provide a sheet forming apparatus having a self-contained flying die that can simplify the configuration of the sheet forming apparatus to reduce the molding cost while maximizing its applicability from small and medium products to large products.

It is also an object of the present invention to provide a sheet forming apparatus having a self-contained flying die capable of forming a sheet while the punch vibrates with a constant frequency and amplitude.

In addition, the present invention is to provide a plate forming apparatus having a self-contained flying die that can be easily replaced by the flying die, the pressing operation for compressive residual stress to improve the formability as well as bending deformation of the plate.

According to the present invention, the flying die is provided to be freely movable on one side of the plate to be formed; A punch provided on the other side of the plate; A punch supporter for supporting the punch; A punch driving part provided in the punch supporting part to perform molding by relatively moving the punch toward the plate; And a die constraining portion for constraining the position of the flying die by a magnetic force such that the flying die is positioned corresponding to the punch with the plate member interposed therebetween.

The die constraining part may include a first magnetic part provided in the flying die and a second magnetic part provided in the punch support part and having a polarity opposite to that of the first magnetic part.

The first magnetic part and the second magnetic part may be provided as one of a permanent magnet or a solenoid.

When the first magnetic part or the second magnetic part is provided as a permanent magnet, the permanent magnet may be detachably provided to the flying die to control the restraint magnetic force.

When the first magnetic part or the second magnetic part is provided with a solenoid, the solenoid may be replaceable to adjust the restraint magnetic force, or the amount of current input to the solenoid may be adjusted.

The punch driving part may be provided in the punch support part to press and vibrate the punch at a predetermined cycle toward the plate.

The punch driving unit may be provided as one of a hydraulic or pneumatic cylinder, a servo motor, and a solenoid.

When the punch driver is provided with a solenoid, the punch driver may further include an inverter for controlling a vibration period of the punch by adjusting a frequency of an AC current input to the solenoid.

The inverter may be provided to enable the control of the strength of the AC current input to the inverter to enable the amplitude adjustment of the punch.

Further comprising a plate fixing portion for fixing the end of the plate, the plate fixing portion may be provided to be rotatable about a predetermined axis in the plate surface direction of the plate.

The flying die may be provided in any one of a flat surface, a convex shape, a concave shape, a semicircle shape, or a 'c' shape opening downward, in contact with the plate.

The punch support unit may further include a punch support unit driving unit capable of moving the punch support unit in front, rear, left and right so as to move the punch to a predetermined molding position.

On the other hand, the object is, according to another embodiment of the present invention, a flying die which is provided to be freely movable on the upper portion of the formed plate fixed by the plate fixing portion; A punch provided below the plate; A punch supporter for supporting the punch; A punch driving part provided in the punch supporting part to press-push the punch at regular intervals toward the plate to perform molding; A position of the flying die by magnetic force, including a first permanent magnet provided in the flying die and a second permanent magnet provided in the punch support part, so that the flying die and the punch are positioned in the upper and lower portions with the plate interposed therebetween. It is also achieved by a sheet forming apparatus having a magnetic restraint-type flying die including;

Or, the object is, in accordance with another embodiment of the present invention, a flying die which is provided to be freely movable on the upper part of the plate to be fixed by the plate fixing portion; A punch provided below the plate; A punch supporter for supporting the punch; A punch driving part provided in the punch supporting part to press-push the punch at regular intervals toward the plate to perform molding; A first permanent magnet provided in the flying die and a solenoid provided in the punch support part to restrain the position of the flying die by magnetic force such that the flying die and the punch are positioned above and below the plate member. It is also achieved by a sheet forming apparatus having a magnetically bound-type flying die, including a die constraining portion.

The first permanent magnet or the second permanent magnet may be detachably provided to enable the intensity control of the constrained magnetic force.

The punch driving unit may be provided by any one of a hydraulic or pneumatic cylinder or a motor.

The punch driving unit may be provided as a solenoid to vibrate the punch alternately to the N and S poles by the alternating current input to the punch support unit.

It may further include an inverter for adjusting the strength and frequency of the AC current input to the solenoid.

According to the plate forming apparatus having the magnetically-constrained flying die having the above-described structure, the die can be fixed and moved without any mechanical support or driving by constraining the position of the die corresponding to the punch by the magnetic force.

In addition, since there is no need for a separate mechanical support or driving for fixing and moving the die, it is possible to simplify the configuration of the sheet forming apparatus and reduce molding cost.

In addition, according to the type of product and the purpose of molding, simply replace the flying die to be seated on the plate, so the molding operation is not only simple, it can maximize the applicability from small to large products to large products.

In addition, the replacement of the flying die is easy, so that not only the bending deformation of the sheet material but also the pressurization work for compressive residual stress to improve formability can be improved, thereby improving usability.

1 is a block diagram of a sheet forming apparatus having a magnetically bound flying die according to the present invention;
2 and 3 are cross-sectional views of a sheet forming apparatus having a self-contained flying die according to a first embodiment of the present invention;
4 and 5 are cross-sectional views of a sheet forming apparatus having a magnetically bound flying die according to a second embodiment of the present invention;
6 and 7 are cross-sectional views of a sheet forming apparatus having a magnetically bound flying die according to a third embodiment of the present invention;
8 is a configuration diagram of a one-point incremental molding (SPIF),
9 is a configuration diagram of the advantage progressive molding (TPIF),
10 is a configuration diagram of a mobile progressive molding (KISF).

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 and 2, a sheet forming apparatus 1 having a magnetically-constrained flying die according to the present invention includes a flying die 10, a punch 20, and a punch support unit for supporting the punch 20 ( 210, a punch driving unit 230 for relatively forming the punch 20 by moving the punch 20 toward the plate S, and the flying die 10 corresponds to the punch 20 with the plate S therebetween. And a die constraining portion 30 for constraining the position of the flying die 10 by magnetic force to be positioned.

That is, in the sheet forming apparatus 1 having the magnetic force-restricting flying die according to the present invention, the position of the flying die 10 corresponds to the punch 20 by the magnetic force rather than mechanical restraint through the die constraining portion 30. In the constrained state, the punch 20 drives the punch 20 to form the plate S. FIG.

Here, the restraint structure of the flying die 10 and the drive structure of the punch 20 are distinguished from each other, and the restraint of the flying die 10 may use, for example, a permanent magnet or a solenoid, and drive the punch 20. May be driven by, for example, a mechanical configuration (hydraulic / pneumatic cylinder or servomotor, etc.) or by a magnetic force using a solenoid.

Hereinafter, the restraint structure of the flying die 10 and the drive structure of the punch 20 will be described in detail.

First, looking at the restraint structure of the flying die 10 through the die constraining portion 30, the die constraining portion 30 is the first magnetic portion 31 and the punch support portion 210 provided in the flying die 10 And a second magnetic part 35 provided in the second magnetic part 31 and having a polarity opposite to that of the first magnetic part 31.

The first magnetic part 31 conducts the flying die 10 to either the polarity of the N pole or the S pole, and the second magnetic part 35 is provided to have the opposite polarity with the flying die 10. Constrain the flying die 10 to the punch support 210.

Here, the flying die 10 is freely movable on one side of the formed plate S, which means that the flying die 10 is freely movable. It is to be seated on one side of the plate (S) without mechanical support.

Therefore, the position of the flying die 10 is fixed only by restraint by the magnetic force of the die constraining part 30, and when the punch support part 210 moves, it restrains and moves along.

The first magnetic part 31 and the second magnetic part 35 may be provided in various kinds. For example, the first magnetic part 31 and the second magnetic part 35 may be provided as one of a permanent magnet or a solenoid.

That is, both the first magnetic part 31 and the second magnetic part 35 may be permanent magnets, the first magnetic part 31 may be permanent magnets, and the second magnetic part 35 may be provided with solenoids. have.

When the first magnetic part 31 or the second magnetic part 35 is provided as a permanent magnet, the permanent magnet may be detachably provided to the flying die 10 so as to control the restraint magnetic force.

The strength of the magnetic force of the permanent magnet is related to the magnitude of the restraining force of the flying die 10 and the blow energy during the blow vibration of the punch 20.

That is, the plate forming apparatus (1) having a self-contained flying die according to the present invention can be applied to a variety of products from small to medium sized products to large products, and the size and shape of the flying die 10 should be changed according to the type of product. .

Therefore, when the size and weight of the flying die 10 is increased, a relatively large magnetic force is required, so that it is replaced with a permanent magnet having an appropriate magnetic strength.

In addition, there is a need to adjust the blow energy according to the degree of molding or the purpose of molding, that is, whether to bend or simply pressurize the compressive stress, for this purpose by providing a permanent magnet to replace the You can adjust the binding force or hit energy.

On the other hand, when the first magnetic part 31 or the second magnetic part 35 is provided with a solenoid, the strength of the magnetic force may be adjusted by another method.

와 같이 나타낼 수 있으므로 코일의 감은 수(권선수) N 또는 입력되는 전류의 세기를 조절함으로써 플라잉다이의 구속력 또는 타격에너지를 제어할 수 있다. 따라서, 솔레노이드 자체의 교체를 통하여 권선수를 변경할 수도 있고, 인버터(355)를 통하여 솔레노이드로 입력되는 전류량을 조절할 수도 있다.
That is, the strength of the magnetic force by the solenoid

Since it can be expressed as follows, it is possible to control the binding force or the hitting energy of the flying die by adjusting the winding number (winding) N or the strength of the input current. Therefore, the number of windings may be changed by replacing the solenoid itself, or the amount of current input to the solenoid through the inverter 355 may be adjusted.

Next, looking at the driving structure of the punch 20, the punch driving unit 230 may be a blow drive through a mechanical method, such as, for example, hydraulic or pneumatic cylinders or servomotors, or blow using a magnetic force through the solenoid You can also drive.

In particular, in the latter case, since the flying die 10 has the polarity of either the north pole or the south pole by the first magnetic portion 31, the punch is applied to the solenoid 231 by applying an alternating current. Alternately inverting the S pole causes the punch 20 to vibrate by repulsive force or attractive force with the flying die 10.

In this case, the blow cycle of the punch 20 can be controlled by adjusting the frequency of the alternating current applied to the solenoid 231 using the inverter 235, and the number of turns of the solenoid 231 or the alternating current applied to the solenoid 231 can be controlled. By adjusting the intensity, the striking amplitude of the punch 20 can also be controlled.

For reference, when the punch support portion 210 is to be transferred to the next molding position without forming a sheet material, a method of reducing the amplitude of the punch 20 and increasing the frequency may be used.

On the other hand, the flying die 10 used in the sheet-forming apparatus 1 having the magnetically-constrained flying die according to the present invention has a molding purpose (for pressure or bending deformation) and molding conditions (flat plate or sheet having curvature). It can have a variety of cross-sectional shape according to.

For example, when forming a curved surface, as shown in FIGS. 2 and 4, a flying die 10 having a 'c'-shaped cross section opened downward may be used, and the flat plate S may be used. In the case of pressing to leave a compressive stress, a flat flying die 10 as shown in FIGS. 6 and 7 may be used.

In the latter case, since the plate S is subjected to compressive stress, the formability is improved so that necking or fracture does not occur even when the tensile stress is applied during subsequent processing, and the durability life is also improved.

Alternatively, when the compressive stress is applied to the plate S having a constant curvature in addition to the flat plate S, a convex or concave flying die 10 as shown in FIGS. 3 to 5 may be used.

Like the flying die 10, the end shape of the punch 20 can also be used in a variety of shapes depending on the molding conditions and purposes.

In addition, referring to the overall structure of the plate forming apparatus 1 with reference to FIG. 1, the plate S has an end portion fixed to the plate fixing portion 50, and the plate fixing portion 50 may be fixed. It may be provided to be rotatable about a predetermined axis (a) in the plate surface direction of the plate material (S).

In addition, the plate (S), as shown in Figure 1, in many cases is installed in the horizontal direction with respect to the ground, but the application of the present invention is not necessarily limited thereto, even if the plate (S) is installed in an inclined state flying There is no effect on the restraint of the die 10.

On the other hand, the punch 20 may further include a punch support part driving unit 40 to enable the punch support to be moved back and forth, left and right or up and down so as to move (transfer) to the set molding position.

Hereinafter, each embodiment will be described in detail.

1 to 3 show a sheet forming apparatus 1 having a magnetically bound flying die according to a first embodiment of the present invention.

In the sheet forming apparatus 1 having the magnetically-constrained flying die according to the present embodiment, the restraint of the flying die 10 is defined by the first permanent magnet 311 and the punch support part 210 on the flying die 10 side. 2 is carried out by the permanent magnet 351, the impact vibration of the punch 20 is performed by the solenoid 231 provided in the punch support (210).

Referring to the drawings, the flying die 10 is provided on the upper part of the formed plate S fixed by the plate fixing part 50 to be freely moved without any mechanical support.

The punch support part driving part 40 may be further provided below the punch support part 210 so as to transfer the punch support part 210 to a predetermined molding position. The punch support part driving part 40 is provided on the stage 60 which is a working space.

The punch 20 is provided below the plate S, and a punch support part 210 for supporting the punch 20 is further provided.

The punch support part 210 may be provided in various shapes. For example, as illustrated in FIG. 2, the punch support part 210 may be provided in a cylindrical shape so that the punch 20 may be pulled in and out (vibration) from the inside. .

The punch driving unit 230 is provided in the punch support unit 210 to press and vibrate the punch 20 with respect to the plate S at regular intervals. In particular, in the present embodiment, a coil is formed outside the punch support unit 210. A winding solenoid 231 is formed, and a power supply unit 237 and an inverter 235 for applying AC power to the solenoid 231 are provided.

The die constraining part 30 is provided with the first magnetic part 31 and the second magnetic part 35. In the present embodiment, the first magnetic part 31 and the second magnetic part 35 are each of the first magnetic part 31. It is provided with a permanent magnet 311 and the second permanent magnet (351).

According to the above configuration, in the sheet forming apparatus 1 having the self-contained flying die according to the present embodiment, the flying die 10 is conducted to the N pole (or vice versa) by the first permanent magnet 311, Since the second permanent magnet 351 provided in the punch support part 210 is an S pole (or vice versa), the flying die 10 may be operated by a magnetic attraction between the first permanent magnet 311 and the second permanent magnet 351. ) Is constrained to be located on top of the punch 20.

Next, when AC power is applied to the solenoid 231, the punch 20 is sequentially conducted to the N pole and the S pole, and the flying die 10 is conducted to the N pole by the first permanent magnet 311. Therefore, when the punch 20 is the S pole, the attraction force acts between the flying die 10 and the punch 20 as shown in (a) of FIG. 2, and the punch 20 strikes the plate S, and the punch ( When 20) is conducted to the N pole, it is spaced apart from the plate S as shown in FIG. 2B by repulsive force.

At this time, the flying die 10 is to hold the plate (S) firmly from the top when the punch 20 is hit by the attraction force with the second permanent magnet 351 so that the molding by the punch 20 is performed do.

As described above, the restraining force of the flying die 10 may be controlled by appropriately replacing the first permanent magnet 311 or the second permanent magnet 351.

In addition, the punching period of the punch 20 can be controlled by adjusting the frequency of the AC power applied to the solenoid 231 through the inverter 235, the vibration width of the punch 20 is also input through the inverter 235 Control is possible by adjusting the strength of the current.

On the other hand, the shape of the flying die 10 and the punch 20 can be used freely replaceable according to the molding purpose, as shown in Figure 2 is for bending molding, the one shown in Figure 3 is bent in the downward direction The pressurization of (S) is shown.

4 and 5 show a sheet forming apparatus 1 having a self-contained flying die according to a second embodiment of the present invention.

In the plate forming apparatus 1 having the magnetically-constrained flying die according to the present embodiment, the restraint of the flying die 10 is made by the first permanent magnet 311 and the second permanent magnet 351, and the punch 20 The vibration drive of the main body is performed by a servo motor, a hydraulic or pneumatic cylinder, and the like.

Positions of the first permanent magnets 311 and the second permanent magnets 351 are not limited to those shown in the drawings in the present invention, and various modifications are possible. For example, in the case of the second permanent magnet 351, the punch support part 210 itself may be provided as a permanent magnet.

In this embodiment, unlike the first embodiment, since the solenoid 231 is not applied, the punch 20 has no polarity and is driven by a servomotor or a pneumatic cylinder to perform a blow.

The striking period and striking amplitude of the punch 20 in this embodiment is possible by controlling the operations of the servomotor and the pneumatic cylinder.

Meanwhile, FIG. 4 shows an example of the shape of the flying die 10 and the punch 20 when bending the convexly curved plate S to the top, and FIG. 5 is the same plate S as in FIG. 4. An example of the shape of the flying die 10 and the punch 20 for press molding the die is shown.

6 and 7 show a plate forming apparatus 1 having a magnetically bound flying die according to a third embodiment of the present invention.

In the sheet forming apparatus 1 having the self-contained flying die according to the present embodiment, the restraint of the flying die 10 is restricted to the first permanent magnet 311 on the flying die 10 side and the solenoid on the punch support part 210 side. 353, the striking vibration of the punch 20 is performed by a pneumatic / hydraulic cylinder or a servomotor.

In the present embodiment, the solenoid 353 must maintain the opposite polarity of the flying die 10 conducted by the first permanent magnet 311, so that the solenoid 353 is input with a direct current instead of an alternating current.

In the present embodiment, the strength of the constrained magnetic force can be controlled by replacing the first permanent magnet 311 or controlling the current strength of the solenoid 353 or the number of turns of the solenoid 353 through the inverter 355.

On the other hand, the striking period or striking amplitude of the punch 20 is possible through the operation control of the servomotor or the pneumatic cylinder as in the second embodiment.

6 and 7 show an example of the shape of the flying die 10 and the punch 20 for unmolding and pressing a flat plate.

1: Plate forming apparatus having a magnetically bound flying die.
10: flying die 20: punch
210: punch support portion 211: first spring
212: second spring 230: punch driving unit
231: solenoid 235: inverter
237 power supply unit 30 die constraining unit
31: First Magnet 311: First Permanent Magnet
35: second magnetic department 351: the second permanent magnet
353: solenoid 355: inverter
357: power supply S: plate
40: punch support driving unit 50: plate stock fixing
60 stage

Claims (18)

A flying die provided on one side of the plate to be freely moved;
A punch provided on the other side of the plate;
A punch supporter for supporting the punch;
Punch drive unit having a solenoid and an inverter for controlling the oscillation period of the punch by adjusting the frequency of the alternating current input to the solenoid, is provided in the punch support portion to move the punch relative to the plate to perform molding ; And
And a die constraining portion for constraining the position of the flying die by a magnetic force such that the flying die is positioned corresponding to the punch with the plate interposed therebetween. 2. The method of claim 1,
The die constraining portion includes a first magnetic portion provided in the flying die, and a plate member having a magnetic restraining flying die, the second magnetic portion provided in the punch support portion and having a polarity opposite to that of the first magnetic portion. Molding apparatus. The method of claim 2,
And the first magnetic part and the second magnetic part are formed of any one of permanent magnets and solenoids. The method of claim 3,
In the case where the first magnetic part or the second magnetic part is provided as a permanent magnet, the plate forming apparatus having the magnetically-restricted flying die, wherein the permanent magnet is detachably provided to the flying die so as to control the restraint magnetic force. . The method of claim 3,
When the first magnetic part or the second magnetic part is provided with a solenoid, the magnetically constrained flying, characterized in that the solenoid is replaceable or the amount of current input to the solenoid can be adjusted so as to control the restraint magnetic force. Plate forming apparatus having a die. The method of claim 1,
And said punch driving part is provided in said punch support part to pressurize and oscillate said punch toward said sheet material at regular intervals. delete delete The method of claim 1,
The inverter is a plate forming apparatus having a magnetically bound-type flying die, characterized in that it is possible to adjust the strength of the alternating current input to the inverter to enable the amplitude adjustment of the punch. The method of claim 1,
It further comprises a plate fixing portion for fixing the end of the plate, wherein the plate fixing portion is a plate forming apparatus having a magnetic restraining flying die, characterized in that the rotation is provided around a predetermined axis in the plate surface direction . The method of claim 1,
The flying die is a plate forming apparatus having a self-contained flying die, characterized in that the cross section of the contact surface in contact with the plate is provided in any one of a flat, convex, concave, semi-circular or '''opening downward. The method of claim 1,
And a punch support part driving part for allowing the punch support part to move forward, backward, left and right so that the punch can be moved to a predetermined molding position. A flying die provided on the upper part of the formed plate fixed by the plate fixing part to enable free movement;
A punch provided below the plate;
A punch supporter for supporting the punch;
A punch driving part provided in the punch supporting part to press-push the punch at regular intervals toward the plate to perform molding;
A position of the flying die by magnetic force, including a first permanent magnet provided in the flying die and a second permanent magnet provided in the punch support part, so that the flying die and the punch are positioned in the upper and lower portions with the plate interposed therebetween. Die constraining portion to restrain;
The punch driving unit is provided with a solenoid to vibrate the punch alternately to the N and S poles by the alternating current input to the punch support unit,
And an inverter for adjusting the strength and frequency of the alternating current input to the solenoid. A flying die provided on the upper part of the formed plate fixed by the plate fixing part to enable free movement;
A punch provided below the plate;
A punch supporter for supporting the punch;
A punch driving part provided in the punch supporting part to press-push the punch at regular intervals toward the plate to perform molding;
A first permanent magnet provided in the flying die and a solenoid provided in the punch support part to restrain the position of the flying die by magnetic force such that the flying die and the punch are positioned above and below the plate member. Including die;
The punch driving unit is provided with a solenoid to vibrate the punch alternately to the N and S poles by the alternating current input to the punch support unit,
And an inverter for adjusting the strength and frequency of the alternating current input to the solenoid. The method according to claim 13 or 14,
The first permanent magnet or the second permanent magnet is a plate forming apparatus having a magnetic restraint-type flying die, characterized in that detachably provided to enable the intensity control of the restraint magnetic force. delete delete delete

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