KR101735940B1 - press apparatus for curvature forming of metal plate using elastic body plate - Google Patents

Abstract

The press apparatus according to the present invention includes: a punch which reciprocates up and down to form a curved surface along a transverse direction; An elastic body plate mounted on a groove formed in a die so as to correspond to the shape of the metal plate and on which the metal plate is lifted; And cylindrical first and second support members disposed in the longitudinal direction of the elastic plate and supporting the elastic plate at symmetrical positions of the left and right sides of the elastic plate under the groove in the groove.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a press apparatus for curving a metal plate using an elastic plate,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press apparatus and, more particularly, to a press apparatus capable of curving a metal plate using a pressure applied by a punch and a deformation / restoration mechanism of an elastic plate mounted on a lower die by the pressure, .

Metal plate materials are used in various parts of ships, aircraft, automobiles, and household appliances, and they are widely used as frame materials. The use thereof is widely used not only as a flat plate type metal plate but also as a curved surface type metal plate.

BACKGROUND ART [0002] In general, as a device for forming a curved surface of a metal plate, a stationary press type plate material forming device using a stationary metal mold is used. However, in the case of a curved surface forming apparatus using such a fixed mold, when the design of the product is changed, the mold must be re-manufactured to match the new design, so that the mold processing cost is increased and the work interruption due to the replacement is inevitable. That is, such a curved surface forming apparatus has a disadvantage in that its production cost and maintenance cost are high, work efficiency due to replacement is low, and it is not suitable for production of various products.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a press apparatus for machining a metal plate material, which is capable of reducing a mold processing cost itself by using an elastic plate and reducing a mold replacement cost according to a new design.

Another object of the present invention is to provide a press device for machining a metal plate material which is highly efficient in operation using an elastic plate and is suitable for producing a multi-product type curved plate.

It is another object of the present invention to provide a press apparatus for machining a metal plate material which can increase a forming rate by supporting a lower portion of an elastic plate with a supporting member.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

According to an aspect of the present invention, there is provided a press apparatus for machining a metal plate material, comprising: a punch for vertically reciprocating a metal plate in a lateral direction to form a curved surface; An elastic body plate mounted on a groove formed in a die so as to correspond to the shape of the metal plate and on which the metal plate is lifted; And cylindrical first and second support members disposed in the longitudinal direction of the elastic plate and supporting the elastic plate at symmetrical positions of the left and right sides of the elastic plate under the groove in the groove.

The metal plate can be processed to a target curvature determined according to the curvature of the punch, based on the pressure applied by the up and down movement of the punch and the deformation / restoration of the elastic plate by the pressure.

The first and second support members rotate clockwise and counterclockwise when pressure is applied to the elastic plate by the punch, based on the friction force with the elastic plate, and the pressure by the punch When it is released, it can rotate counterclockwise and clockwise.

Wherein the first and second support members comprise cylindrical first and second support members provided in the longitudinal direction of the elastic plate at symmetrical positions on the left and right sides of the bottom of the groove and having a curvature corresponding to a curvature of the surfaces of the first and second support members, And is rotatable clockwise or counterclockwise in the first and second lower grooves based on a change in pressure applied to the elastic plate according to the reciprocating movement of the punch .

Wherein the first and second support members include fixing shafts inserted at both ends of a circular coupling hole provided in a side surface of the groove and configured to be movable in the vertical direction on the basis of a change in pressure applied to the elastic plate in accordance with the reciprocating motion of the punch And can rotate clockwise or counterclockwise around the fixing shaft.

The first and second support members move in the direction of the edge of the groove when pressure is applied to the elastic plate by the punch on the basis of the frictional force with the elastic plate, It is possible to move toward the center of the groove.

Wherein the first and second support members are provided in the longitudinal direction of the elastic plate at symmetrical positions on the left and right sides of the bottom of the groove and have cylindrical first and second cylindrical members having a curvature larger than that of the surfaces of the first and second support members, When the pressure is applied to the elastic plate by the punch, the first and second lower grooves are rotated in the direction of the edge of the groove while the pressure by the punch is released It is possible to move in the center direction of the groove while rotating within the first and second lower grooves.

Wherein the first and second support members include fixing shafts at both ends which are inserted into coupling holes having a curvature path provided on a side surface of the groove and, when pressure is applied to the elastic plate by the punch, And moves in the direction of the center of the groove while rotating in the engagement hole when the pressure by the punch is released.

According to the present invention, there is provided a press apparatus for machining a metal sheet material, comprising: a punch which reciprocates up and down to form a curved surface along a transverse direction; An elastic body plate mounted on a groove formed in a die so as to correspond to the shape of the metal plate and on which the metal plate is lifted; And cylindrical first and second support members arranged in the longitudinal direction of the elastic plate at symmetrical positions on the left and right sides of the bottom of the elastic plate in the groove to support the elastic plate, .

Wherein a cross section of the punch of the preliminary pressing portion includes first and second rounds formed with a vertex at a symmetrical position in the transverse direction center of the metal plate material, A single round in which a vertex is formed.

The metal plate can be curved in each of the pre-pressing portion and the main pressing portion based on the pressure applied by the up-and-down movement of the punch and the deformation / restoration of the elastic plate by the pressure. The first and second support members of each of the pre-pressing portion and the main pressing portion are rotated clockwise and counterclockwise when pressure is applied to the elastic plate by the punch, and the pressure by the punch is released It can be rotated counterclockwise and clockwise.

The press device for curving a metal plate material according to the present invention is a device for curving a metal plate by using a press and an elastic plate mounted on the die so as to reduce the mold processing cost itself and reduce the mold replacement cost according to the new design There are advantages.

The pressing device for curving a metal plate material according to the present invention has advantages of high work efficiency and suitable for producing a multi-type curved plate because the metal plate is curved by using an elastic plate mounted on a press and a die.

In the press apparatus for machining a metal plate material according to the present invention, the forming rate can be increased by supporting the lower portion of the elastic plate with the supporting member.

FIG. 1 conceptually illustrates a curved surface machining process of a press apparatus for machining a metal plate material according to the present invention.
Fig. 2 is a view for explaining an example of a punch of a press apparatus for machining a metal sheet material according to the present invention.
Fig. 3 is a view for explaining the relationship between the curvature of the punch and the target curvature of the metal plate in the press apparatus for machining a metal plate material according to the present invention.
4 is a plan view showing a state in which a metal plate 200 is mounted on a press apparatus for machining a metal plate material according to the present invention.
5 is a conceptual view showing another example of a punch of a press apparatus for machining a metal plate material according to the present invention.
FIG. 6 shows an example in which different punch curvatures are implemented using the punch shown in FIG.
7 is a view showing an example of the structure of a press apparatus for machining a metal plate material using an elastic plate according to the present invention.
8 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.
9 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.
10 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.
11 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.
12 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.
13 is a view conceptually showing a configuration of a press apparatus for machining a metal plate material according to the present invention.
14 is a view conceptually showing the structure of a punch for preliminary machining and a punch for main machining in a press apparatus for machining a metal plate material according to the present invention.

For a better understanding of the present invention, its operational advantages and features, and the objects attained by the practice of the present invention, reference should be made to the accompanying drawings, which form a preferred embodiment of the invention, and the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

FIG. 1 conceptually shows a curved surface machining process of a press apparatus 100 for machining a metal plate material according to the present invention. Referring to FIG. 1, the press apparatus 100 includes a punch 110, a die 120, and an elastic body plate 130. 1 are not essential, the press apparatus 100 for machining a metal plate according to the present invention may have more or less components than those of the metal plate curving processing apparatus 100 according to the present invention. Hereinafter, the components will be described in order.

The punch 110 provides a pressure for curving the metal plate while moving up and down. One end of the punch 110 forms a curved surface, and the curvature of the curved surface must be smaller than the target curvature of the metal plate. This is because it is necessary to consider the thickness of the metal plate 200 and the restoring force that the pressure is applied by the punch and the curved metal plate is returned to its original state.

An elastic plate 130 mounted on a groove corresponding to the shape of the metal plate 200 is mounted on the die 120. The elastic plate 130 may be a polyurethane elastic body, a composite material elastic body, or the like. However, the scope of the present invention is not limited thereto.

The metal plate is processed into a curved surface based on the pressure applied by the up and down movement of the punch 110 and the deformation / restoration of the elastic plate 130 by the pressure. At this time, the metal plate can be processed to a target curvature determined according to the curvature of the punch 110.

The elastic plate 130 mounted on the die 120 is deformed in its shape based on the pressure applied by the punch 110 regardless of the shape of one end of the punch 110, It can be recovered. Therefore, since the press apparatus 100 according to the present invention can use the die as it is in various types of curved surface machining, its manufacturing cost is lower than that of the metal die, the mold replacement cost is low, Can be reduced, and it is also suitable for production of various kinds of curved surface materials.

1 (a) shows that the metal plate 200 is placed on the elastic plate 130 mounted on the die 120. FIG. 1 (a), the punch 110 is lowered and pressure is applied to the metal plate 200, as shown in FIG. 1 (b). Then, the metal plate 200 is curved according to the pressure and the interlocking mechanism of deformation of the elastic plate 130.

1 (b), the punch 110 moves up and the pressure applied to the metal plate 200 is released, as shown in FIG. 1 (c). Then, the metal plate 200 is restored by its own restoring force. At this time, the curvature of the restored metal plate 200 is the target curvature.

The pressing apparatus 100 can control the vertical moving speed of the punch 110 in consideration of the restoring force of the metal plate 200. Even if the punch has the same curvature, the molding energy transferred to the metal plate 200 by the punch becomes high if the up-down moving speed is high. Based on this principle, the pressing apparatus 100 can increase the vertical moving speed of the punch 110 as the metal plate having strong restoring force.

The pressing apparatus 100 can control the vertical moving distance of the punch 110 in consideration of the restoring force of the metal plate 200. [ Even with a punch having the same curvature, the greater the up-down movement distance, the greater the forming energy transmitted to the metal plate 200 by the punch. Based on this principle, the pressing apparatus 100 can increase the vertical moving distance of the punch 110 as the metal plate having strong restoring force.

The pressing apparatus 100 can control the time for applying pressure to the metal plate near the lowest point of the vertical movement of the punch in consideration of the restoring force of the metal plate 200. [ Even with a punch having the same curvature, the restoring force of the metal plate can be canceled to some extent as the time for applying the pressure near the lowest point of the up-down movement increases. Based on this principle, the pressing apparatus 100 can increase the pressure applied to the metal plate 200 at the lowest point of the vertical movement of the punch 110 as the metal plate having strong restoring force.

The pressing apparatus 100 may control the curvature of the punch 200 in consideration of at least one of a restoring force of the metal plate 200 and a target curvature of the metal plate 200. The curvature control example of the punch itself will be described in more detail with reference to FIGS. 5 and 6. FIG.

2 is a view for explaining an example of a punch 110 of a press apparatus 100 for machining a metal plate material according to the present invention.

2 (a) is a perspective view of the punch 110. As shown in Fig. 2 (b) is a front view of the punch 110 viewed from the front. 2 (c) shows a right side view of the punch 110. As shown in Fig. Referring to FIG. 2, the punch 110 has a shape similar to a quadrangular prism, and a portion that applies pressure to the metal plate 200 has a round shape having a predetermined curvature for curvature machining. The portion of the punch 110 which applies pressure to the metal plate 200 may have various shapes depending on the shape of the metal plate 200 to be curved.

3 is a view for explaining the relationship between the curvature of the punch 110 and the target curvature of the metal plate 200 of the pressing apparatus 100 for curving a metal plate material according to the present invention.

3, it can be seen that the curvature R_Punch of the round formed at one end of the punch 110 is smaller than the final target curvature R_Target for the metal plate 200. This is because, as described above, the thickness of the metal plate 200 and the restoring force of the metal plate, which is subjected to the pressure by the punch and is operated by the curved surface, should be taken into consideration.

4 is a plan view showing a state in which a metal plate material 200 is put on a pressing apparatus 100 for machining a metal plate material curved surface according to the present invention.

Referring to FIG. 4, it can be seen that the metal plate 200 is placed on the elastic plate 130 mounted on the grooves of the die 120. The shape of the elastic plate 130 as viewed from above is a rectangular shape like the shape of the metal plate 200. The metal plate 200 may be fixed to the die 120 by fastening means 121 to 124 corresponding to corner portions of the elastic plate 130. 4, when the punch 110 is lowered and pressure is applied to the metal plate 200, the metal plate 200 is curved to have a curvature corresponding to the curvature of one end of the punch 110 Can be processed.

5 is a conceptual view showing another example of the punch 110 of the pressing apparatus 100 for machining a metal plate material according to the present invention. FIG. 6 shows an example in which different punch curvatures are implemented using the punch 110 shown in FIG.

Referring to FIG. 5, the punch 110 includes a plurality of lower punching elements 110A to 110E. The descending heights of the plurality of lower punching elements 110A to 110E can be controlled differently. The descent height control of the plurality of lower punching elements 110A to 110E may be performed by a method using an oil pressure or an air pressure, a method of fixing by using a mechanical part at another position, or the like.

The pressing apparatus 100 for processing a metal plate controls the descending heights of the plurality of lower punching elements 110A to 110E in consideration of a restoring force of the metal plate 200 and a target curvature of the metal plate 200 The curvature of the punch 110 can be controlled.

Referring to FIG. 6, the punch 110 may implement different punch curvatures by adjusting the lowering heights of the plurality of lower punching elements. That is, the pressing apparatus 100 for machining a metal sheet material according to the present invention can have a processing ability of a plate material having various curvatures through controlling the descending heights of the plurality of lower punching elements 110A to 110E.

6, the pressing apparatus 100 for machining a metal plate material curved surface according to the present invention controls not only a simple curved surface but also a complex curved surface by controlling the shapes of the plurality of lower punching elements and the arrangement thereof A metal plate may be processed. For example, the pressing apparatus 100 can perform processing of a metal plate having various curved surfaces by setting different descending heights of a plurality of columnar lower punching elements arranged in a rectangular shape.

7 is a view showing an example of the structure of a press apparatus for machining a metal plate material using an elastic plate according to the present invention.

Figure 7 (a) shows the die 120 of the press apparatus. The die 120 is provided with grooves 125 on which the elastic plate 130 and the support members 140 and 142 are mounted. The shape of the groove 125 of the die 120 corresponds to the shape of the metal plate to be curved.

7 (b) shows that the support members 140 and 142 are mounted in the grooves 125 of the die 120. FIG. 7C shows that the support members 140 and 142 are mounted on the grooves 125 of the die 120 and the elastic plate 130 is mounted thereon. A metal plate to be curved in the transverse direction is mounted on the elastic plate 130.

The support members 140 and 142 include a first support member 140 and a second support member 142 through which the first support member 140 and the second support member 142 are inserted, At the symmetrical positions of the left and right lower portions of the elastic plate 130, the elastic plate is disposed in the longitudinal direction of the elastic plate to support the elastic plate.

The metal plate to be machined has a target curvature determined according to the curvature of the punch 110, based on the pressure applied by the up and down movement of the punch 110 and the deformation / restoration of the elastic plate 130 by the pressure Can be processed. The first support member 140 and the second support member 142 are configured such that when pressure is applied to the elastic plate 130 by the punch 110 based on the frictional force with the elastic plate 130, And when the pressure by the punch 110 is released, it can be moved toward the center while rotating in the opposite direction.

7, the elastic plate 130 is mounted on the support members 140 and 142, so that the metal plate to be molded can be more easily curved than the structure shown in Fig. 1 have. This is the same in the embodiments to be discussed later. Hereinafter, the press devices having the same or similar structure as the structure shown in FIG. 7 will be described in more detail.

8 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.

8 (a) shows a state in which the support members 140 and 142 are mounted in the symmetrical positions P1 and P2 at the lower center O of the elastic plate 130 in the groove 125 of the die 120 . In FIG. 8, the points indicated on the support members 140 and 142 indicate the centers of the support members 140 and 142. This is also true in FIG. 9 and FIG.

In the state of FIG. 8 (a), the punch 110 descends for the curved surface machining along the transverse direction of the metal plate. 8 (b), the first supporting member 140 rotates in the clockwise direction to move away from the center O (from P1 to P3), and the second supporting member 142 rotates counterclockwise (Moving from P2 to P4) while rotating in the direction of the center (O). Then, the punch 110 is lifted.

8 (c), the first supporting member 140 rotates counterclockwise to approach the center O (moves from P3 to P1), and the second supporting member 142 rotates counterclockwise, (Moving from P4 to P2) at the center O while rotating in the clockwise direction.

That is, when the pressure is applied to the elastic plate by the punch 110, the support members 140 and 142 move in the direction of the edge of the groove 125 on the basis of the frictional force with the elastic plate 130 And can move toward the center of the groove 125 when the pressure by the punch 110 is released. This is also true in the examples shown in Figs. 11 and 12 to be discussed later.

The frictional force between the elastic plate 130 and the support members 140 and 142 is reduced by the support member 140 and 142 due to the rotation or movement of the support member 140 and 142 as the punch 110 is lowered or raised, It can be reduced compared to the case where it is fixed. Then, the durability of the press apparatus can be increased by freezing the structure having the fixed support member. This is also true in the examples to be discussed in the future.

8, punches are not shown for the sake of simplicity, and only the bottom 125 'portion of the groove 125 of the die 120 is shown. This is the same in the embodiments to be discussed later.

9 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.

9 (a) is a plan view of the elastic plate 130 in the longitudinal direction of the elastic plate 130 from the lower center O of the elastic plate 130 to the horizontally symmetrical positions P1 and P2 within the groove 125 of the die 120 And the support members 140 and 142 are mounted in the first and second lower grooves. The first and second lower grooves may have a curvature corresponding to a curvature of the support members 140 and 142.

In the state of FIG. 9 (a), the punch 110 descends for the curved surface machining along the transverse direction of the metal plate. 9 (b), the first supporting member 140 rotates clockwise in the first lower groove, and the second supporting member 142 rotates counterclockwise in the second lower groove However, unlike the example of Fig. 8, the support members 140 and 142 do not move in the left-right direction.

Then, the punch 110 is lifted. 9 (c), the first supporting member 140 rotates counterclockwise in the first lower groove, and the second supporting member 142 rotates clockwise in the second lower groove, Direction. However, the support members 140 and 142 do not move in the left-right direction.

10 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.

10, the support members 140 and 142 do not move left and right with respect to the center O of the elastic plate 130 despite the vertical movement of the punch 110, as in the example of FIG. Only the rotational motion is performed at the positions P1 and P2. This is because the shaft 140-1 of the first supporting member 140 is provided with a circular connection provided on the side of the groove 125 of the die 120 for fixing the shaft 140-1 in the left- And the shaft 142-1 of the second supporting member 140 is inserted into the hole 125-1 of the groove 120-1 of the die 120 for fixing the shaft 142-1 so as not to move in the left- 125 inserted in the circular coupling hole 125-2 provided on the side surface. Hereinafter, the operation of the press apparatus will be described in more detail.

10 (a), when the punch 110 is lowered, the first support member 140 rotates clockwise about the shaft 140-1 as shown in FIG. 10 (b) The second support member 142 rotates counterclockwise about the shaft 142-1. However, the support members 140 and 142 do not move in the left-right direction.

Then, the punch 110 is lifted. 10C, the first support member 140 rotates counterclockwise about the axis 140-1 and the second support member 142 rotates about the axis 142-1, 1 in the clockwise direction. However, the support members 140 and 142 do not move in the left-right direction.

11 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.

11 (a) is a plan view of the elastic plate 130 in the longitudinal direction of the elastic plate 130 from the lower center O of the elastic plate 130 to the horizontally symmetrical positions P1 and P2 in the groove 125 of the die 120 And the support members 140 and 142 are mounted in the first and second lower grooves. The first and second lower grooves may have curvatures greater than the curvatures of the support members 140 and 142.

In the state of FIG. 11 (a), the punch 110 is lowered for the curved machining along the transverse direction of the metal plate. Then, as shown in FIG. 11 (b), the first support member 140 rotates clockwise and moves away from the center O along the curved surface of the first lower groove (moves from P1 to P3) 2 support member 142 may move away from the center O along the second lower curved surface while moving counterclockwise (P2 to P4). Then, the punch 110 is lifted.

11 (c), the first supporting member 140 rotates in the counterclockwise direction and approaches the center O along the first lower groove (moves from P1 to P1) The second support member 142 can be moved in the clockwise direction to approach the center O along the second sub-groove (from P4 to P2). In this case, due to gravity, the support members 140 and 142 can easily return to their original positions P1 and P2.

12 is a view for explaining the operation of a press apparatus for machining a metal plate material using an elastic plate according to an embodiment of the present invention.

12A, the shaft 140-1 of the first support member 140 is engaged with the engaging hole 125-3 provided on the side surface of the groove 125 of the die 120 and having a curvature path, And the shaft 142-1 of the second support member 140 is inserted into the coupling hole 125-4 having the curvature path provided on the side of the groove 125 of the die 120. [

12 (b), when the punch 110 is lowered in the state of FIG. 12 (a), the first support member 140 rotates clockwise about the shaft 140-1 The second support member 142 moves along the engagement hole 125-3 to the edge of the groove 125 of the die 120 and the second support member 142 rotates counterclockwise about the axis 142-1 And moves to the edge of the groove 125 of the die 120 along the engagement hole 125-4.

Then, the punch 110 is lifted. 12 (c), the first support member 140 rotates counterclockwise about the axis 140-1 and descends along the engagement hole 125-3, O and the second support member 142 moves toward the center O along the coupling hole 125-4 while rotating clockwise about the shaft 142-1 . In this case, as in the example of Fig. 11, the support members 140 and 142 can easily return to their original positions P1 and P2 by gravity.

13 is a view conceptually showing a configuration of a press apparatus 100 'for machining a metal plate material according to the present invention.

Referring to FIG. 13, the press apparatus 100 'includes a preliminary pressing unit and a main pressing unit. The pre-pressing portion primarily curves a metal plate to be processed. The metal plate material subjected to the first curved surface processing by the pre-pressing portion may be moved to the main pressing portion to be finally curved.

Each of the pre-pressing portion and the main pressing portion may have an elastic plate mounted on the groove of the die, a support member mounted on the lower portion of the elastic plate, and a punch structure for curving. 13, the support member is mounted according to the example of Figs. 7 and 8, but may be mounted according to Figs. 9 to 12 in another example of the present invention.

On the other hand, the pre-pressing portion and the main pressing portion are different in the punch. In other words, the cross section of the punch 110 'of the pre-pressing portion is formed by the first and second punches 110 and 110' having vertices at symmetrical positions P5 and P6 at the center of the transverse direction of the metal plate, Includes the second round.

The positions of the first and second rounds, which are portions for initiating contact with the metal plate to preliminarily impart curvature to the metal plate, may be determined according to the curvature to be imparted to the metal plate. For example, the larger the curvature to be given to the metal plate, the shorter the distance between the first and second rounds, and the smaller the curvature to be given to the metal plate, the longer the distance between the first and second rounds.

The punch 110 of the main pressing part includes a single round in which a vertex is formed at the center O of the metal sheet in the transverse direction. The single round is a portion where contact with the metal plate is started to finally impart a curvature to the metal plate.

14 is a view conceptually showing the structure of a punch for preliminary machining and a punch for main machining in a press apparatus for machining a metal plate material according to the present invention.

Referring to FIG. 14 (a), it can be seen that the punch 110 'of the pre-pressing portion has a pair of rounds at symmetrical positions with respect to the center O of the punch. On the other hand, the position of the round pair may vary depending on the curvature to be given to the metal plate in the pre-pressing step. That is, when the curvature to be preliminarily given to the metal plate is R1, the pair of rounds is provided symmetrically with respect to the distance of D1 from the center O. However, when R2 is smaller than R1, the distance D2 farther from the center O As shown in FIG.

Referring to FIG. 14 (b), the punch 110 of the main pressing part may have a single round having different curvatures according to the curvature finally given to the metal plate. That is, the curvature of a single round when the curvature to be given to the metal plate is R1 'is smaller than that of a single round when the curvature to be given to the metal plate is smaller than R1'.

The punches 110 and 110 'are divided into a single hatched area and an overlapping hatched area. The single hatched area is a part fixed to the punch holder. The overlapping hatched areas are separated and combined by the force applied in the longitudinal direction of the punch. . It is only necessary to replace the overlapping hatched areas without the need to separate the punches from the punch holder during machining or breakage of the metal sheet with different curvatures. Therefore, effects such as improvement of work efficiency and reduction of replacement cost can be provided.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

100: press apparatus 110: punch
120: die 125: groove
130: Elastic plate
140, 142: Support member
200: metal plate material

Claims (7)

A punch that reciprocates up and down to form a curved surface along the transverse direction of the metal plate;
An elastic body plate mounted on a groove formed in a die so as to correspond to the shape of the metal plate and on which the metal plate is lifted; And
And cylindrical first and second support members arranged in the longitudinal direction of the elastic plate and supporting the elastic plate at symmetrical positions of the left and right sides of the lower portion of the elastic plate in the groove,
The metal plate is processed to a target curvature determined according to a curvature of the punch based on a pressure applied by the up and down movement of the punch and a deformation / restoration of the elastic plate by the pressure,
Wherein the first and second support members comprise:
When the pressure is applied to the elastic plate by the punch on the basis of the frictional force with the elastic plate, it rotates clockwise and counterclockwise, and when the pressure by the punch is released, Is rotated by a predetermined angle. 2. The apparatus of claim 1, wherein the first and second support members comprise:
And first and second lower grooves provided in the longitudinal direction of the elastic plate at symmetrical positions on the left and right sides of the bottom of the groove and having a curvature corresponding to a curvature of the surfaces of the first and second support members,
Wherein the punch rotates clockwise or counterclockwise in the first and second lower grooves based on a change in pressure applied to the elastic plate in accordance with the reciprocating motion of the punch. 3. The apparatus according to claim 1 or 2, wherein the first and second support members
A fixing shaft inserted into a circular engagement hole provided on a side surface of the groove at both ends,
Wherein the punch rotates clockwise or counterclockwise around the fixing shaft based on a change in pressure applied to the elastic plate in accordance with a vertical reciprocating motion of the punch. 2. The apparatus of claim 1, wherein the first and second support members comprise:
When the pressure is applied to the elastic plate by the punch on the basis of the frictional force with the elastic plate, moves toward the edge of the groove, and when the pressure by the punch is released, Wherein the pressing device is a press device. 5. The apparatus of claim 4, wherein the first and second support members comprise:
And first and second lower grooves provided in the longitudinal direction of the elastic plate at symmetrical positions on the left and right sides of the bottom of the groove and having a curvature larger than that of the surfaces of the first and second support members,
When the pressure is applied to the elastic plate by the punch, the first and second lower grooves move in the direction of the edge of the groove while rotating in the first and second lower grooves, and when the pressure by the punch is released, 2. The press apparatus according to claim 1, characterized in that it moves in the direction of the center of the groove while rotating within the lower groove. 4. The apparatus of claim 3, wherein the first and second support members comprise:
A fixing shaft inserted into a coupling hole having a curvature path provided on a side surface of the groove at both ends thereof,
When the pressure is applied to the elastic plate by the punch, moves in the direction of the edge of the groove while rotating within the hole, and when the pressure by the punch is released, And moves in the center direction. A preliminary pressing portion; And
And a main pressing part,
Wherein each of the pre-pressing portion and the main pressing portion comprises:
A punch that reciprocates up and down to form a curved surface along the transverse direction of the metal plate;
An elastic body plate mounted on a groove formed in a die so as to correspond to the shape of the metal plate and on which the metal plate is lifted; And
And cylindrical first and second support members arranged in the longitudinal direction of the elastic plate and supporting the elastic plate at symmetrical positions of the left and right sides of the lower portion of the elastic plate in the groove,
Wherein the cross section of the punch of the pre-pressing portion includes first and second rounds formed with vertices at symmetrical positions at the center in the transverse direction of the metal plate material,
Wherein the punch of the main pressing part includes a single round in which a vertex is formed at the center of the metal plate in the transverse direction,
The metal plate is curved in each of the pre-pressing portion and the main pressing portion based on the pressure applied by the up-and-down motion of the punch and the deformation / restoration of the elastic plate by the pressure,
The first and second support members of each of the pre-pressing portion and the main pressing portion are rotated clockwise and counterclockwise when pressure is applied to the elastic plate by the punch, and the pressure by the punch is released And rotates in the counterclockwise direction and the clockwise direction.

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