JP3787900B2 - Sequential stretch forming equipment for metal plates - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molding apparatus that forms a three-dimensional shell shape on a metal plate constituting a casing, doors, and the like, and in particular, a sequential stretch molding apparatus that obtains a predetermined shape by sequentially stretching using a rod-shaped molding punch. It is about.
[0002]
[Prior art]
The technique of forming a three-dimensional shell shape from a metal plate by performing sequential overhang forming has been used for a long time, as seen in spinning processing, sheet metal processing by hammering, and the like.
[0003]
Recently, in thin plate forming, various three-dimensional shell shapes have been studied by sequentially performing overhang forming by controlling the trajectory of a bar-shaped tool on a metal plate that is fixed around the overhang forming portion. It has been broken.
[0004]
The most practical example was published in Plasticity and Processing, Vol. 35, No. 406, (1994), page 1311 (hereinafter referred to as Example 1). Clamping to the frame around the entire circumference, guiding the frame so that it can be moved according to the feed in the depth direction of the tool, and pressing the plate material from the center side toward the periphery with a bar-shaped tool Then, it is a difficult method to produce a cone or pyramid shaped product. In this method, a rod-shaped mold is fixed to a bed of a numerically controlled milling machine, a plate material clamped on a frame is supported by the mold, and the clamped frame is guided with the bed so as to be slidable in the vertical direction. The rod-shaped tool is attached to the main shaft.
[0005]
In addition to this, for example, “Study on Flexible Sequential Forming by Ball Roller” Transactions of the Japan Society of Mechanical Engineers (Part C); Vol. 58, No. 554, pages 3147-3155 (1992), “Sharp Convex by Reverse Process” CNC incremental stretch molding of contour products ”Journal of Japan Society for Technology of Plasticity; Volume 35, No. 406, pages 1348 to 1353 (1994-11).
[0006]
These are the basic examinations of sequential stretch forming, and the literature related to the forming equipment is "Prototype of flexible thin plate sequential forming machine with simple tools", 1994 Spring Meeting of the Japan Society for Technology of Plasticity; 573 Pages to 576 pages (1994-5).
[0007]
[Problems to be solved by the invention]
As the forming apparatus in the sequential stretch forming method, any mechanism can be used as long as the working table for fixing the metal plate and the forming punch can move in the vertical and horizontal directions relatively. In the molding apparatus, there are many restrictions on the shell shape that can be molded. In particular, when the shell shape exists upside down, setup operations such as reversing the metal plate, fixing the metal plate on the processing table, replacing the fixed support plate, etc. are necessary, which increases the setup time. In addition, a decrease in accuracy due to the reversal of the metal plate and the displacement at the time of replacing the support plate occurs, which is a problem in designing the actual forming apparatus.
[0008]
As a method for solving the above-mentioned problems, a molding apparatus having molding punches in both the upper and lower directions of the metal plate may be used. Since the apparatus is large and expensive for securing, it is not used in the actual molding apparatus.
[0009]
Moreover, in the method of Example 1, although it is set as the apparatus structure which has a shaping | molding punch in the up-and-down both directions of a metal plate, since the board | plate material and the type | mold fixed to the bed cannot move relatively in a horizontal direction, the shape of the vertex of a molded article is a bed. Limited to the shape of the fixed mold. For this reason, when a large and small variety of molded products are manufactured, a mold corresponding to the shape of the apex of the molded product is required, and there is a problem that it is not possible to cope with a large variety of small-quantity production.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a horizontal movement mechanism that moves a processing table in which a metal plate to be formed is fixed in a horizontal direction in a forming apparatus that obtains a three-dimensional shell shape by sequentially stretching and forming the metal plate. A tool support for supporting the sequential forming punch is provided on the upper and lower parts of the processing table so that it can be formed from both the upper and lower surfaces of the metal plate fixed to the processing table. In addition to the vertical movement mechanism in the vertical direction, the lower tool support portion has a horizontal movement mechanism having a movement amount smaller than the machining table in the horizontal direction in addition to the vertical direction.
[0011]
As a result, it is possible to mold a wide variety of molded products without being limited by the lower punch shape. Even in a shape in which the three-dimensional shell shape exists in both the upper and lower directions of the metal plate, the metal plate can be formed from the upper and lower surfaces without being inverted.
[0012]
The present invention includes a clamping mechanism for placing a metal plate and clamping the periphery thereof, a table movable in an XY plane, an upper punch positioned above the table, and holding the upper punch on the table An upper punch driving means for driving in the vertical direction with respect to the table, and a lower punch driving for holding the lower punch positioned below the table and driving the lower punch in the vertical direction and the XY direction with respect to the table Means, and the tip of the upper punch is contacted and moved along the contour of the bottom of the three-dimensional shell shape formed on the metal plate, and the tip of the lower punch is formed on the metal plate A metal sheet sequential stretch forming apparatus comprising the table and a control means for controlling each of the driving means in conjunction with each other so as to contact and move along the contour of the top of the shape.
[0014]
In addition, the surface property of the molded product is improved by applying minute vibration and rotation control to the molding punch during sequential stretch molding. Further, by controlling the rotation angle of the forming tool, forming with a non-axisymmetric forming punch can be performed.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
FIG. 1 is a front view of a sequential stretch forming apparatus according to the present invention. FIG. 2 is a side view of the sequential stretch forming apparatus according to the present invention.
[0019]
Hereinafter, the configuration of the molding apparatus will be described with reference to FIGS. 1 and 2.
[0020]
1 is an upper punch and 2 is a lower punch. Reference numeral 11 denotes a workpiece which is a metal plate to be formed. Reference numeral 7 denotes a table for fixing and moving the workpiece 11. The workpiece 11 is fixed to the table 7 by a clamp 10. Reference numerals 8a and 8b denote horizontal movement mechanisms for moving the table 7 in the horizontal direction. The X-direction table mechanism 8a for moving in the horizontal direction (X direction) in FIG. 1 and the horizontal direction in FIG. This is a Y-direction table mechanism unit 8b that moves in the (Y direction). The moving mechanism unit moves the table 7 by a method in which a rotating mechanism such as a motor is combined with a ball screw.
[0021]
Reference numeral 3 denotes an upper tool support part for supporting the upper punch 1, and reference numeral 4 denotes a lower tool support part for supporting the lower punch 2. The upper tool support unit 3 moves in the Z direction by the upper tool support unit vertical movement mechanism unit 5 at the upper part. The lower tool support 4 is moved in the Z direction by the lower tool support vertical movement mechanism 6. Further, the lower tool support portion 4 can be moved in the horizontal direction by lower tool support portion moving mechanism portions 9a and 9b at the lower portion thereof. The X-direction lower tool support portion moving mechanism 9a that moves the lower tool support portion 4 in the horizontal direction (X direction) in FIG. 1 and the lower tool support portion 4 in the horizontal direction (Y direction) in FIG. It is the Y direction lower tool support part moving mechanism part 9b which performs. Here, the maximum amount of movement of the X direction lower tool support part moving mechanism 9a and the Y direction lower tool support part moving mechanism 9b is set according to the shape to be molded. In this embodiment, the moving amount is 100 mm.
[0022]
Also, an X-direction lower tool support moving mechanism 9a that moves the upper tool support 3, upper tool support vertical movement mechanism 5, and lower tool support 4 in the X, Y, and Z directions, a Y-direction lower tool The support part moving mechanism part 9b, the lower tool support part vertical moving mechanism part 6, the X direction table moving mechanism part 8a, and the Y direction table moving mechanism part 8b are supported by the C-shaped base frame 12 in FIG. The above moving mechanism is controlled by a numerical control not shown, for example, by a computer or simultaneous multi-axis control by a computer.
[0023]
Next, an example of a method for forming a three-dimensional shell shape on a metal plate by the sequential stretch forming apparatus having the above-described configuration will be described. This forming apparatus performs forming of a three-dimensional shell shape on a metal plate, for example, a quadrangular frustum shape shown in FIGS. 3A and 3C. ) Will be described. Here, FIG. 3B and FIG. 3D show the PP ′ and QQ ′ sectional views of FIG. 3A and FIG. 3C, respectively.
[0024]
FIG. 4 is a diagram in which the work 11 is fixed to the table 7. In the embodiment of FIG. 4, the workpiece 11 is fixed to the table 7 by the clamp 10 using a fixing jig 15. The table 7 is provided with an L-shaped step portion 16, and a back plate 17 provided with a hole of a predetermined size according to the machining shape of the work 11 is disposed on the step portion 16, and FIG. The portion 13 other than the molded portion in a) is prevented from being deformed when the shell shape 14 is molded.
[0025]
The upper punch 1 is positioned at the forming start position A shown in FIG. 4A with respect to the fixed work 11 by the upper tool support portion vertical movement mechanism 5, the X direction table movement mechanism 8a, and the Y direction table movement mechanism 8b. To do. At the A position, the lower end of the upper punch 1 and the work 11 are in contact with each other. FIG. 4B is a sectional view in the X direction passing through the center of the upper punch in this state. Next, at the A position, the upper tool support portion vertical movement mechanism 5 moves the upper punch 1 downward in the Z direction by Zp. FIG. 4C is a cross-sectional view in the X direction passing through the center of the upper punch in this state. Subsequently, the table 7 is moved by L so that the upper punch 1 comes to the position B in FIG. 4A by the Y-direction table moving mechanism 8b, and then the upper punch 1 is moved to C by the X-direction table moving mechanism 8a. Move by L so that it comes to the position of. Further, the Y direction table moving mechanism 8b is moved by L so as to reach the position D, and finally, the X direction table moving mechanism 8a is moved by L so as to be located at the position A.
[0026]
By performing the above-mentioned table rotational movement ABCDA, the upper punch 1 returns to the position A of the work 11, and the quadrangular frustum shape 14 having a depth Zp in the Z direction is formed on the work 11. Similarly, a series of movements of the upper punch 1 in the Z direction and the circular movement of the table 7 in the X and Y directions is repeated N times a predetermined number of times, thereby obtaining a quadrangular pyramid having a depth in the Z direction of N × Zp. A trapezoidal shape is formed. At this time, after the Nth turn of the table 7 is finished, the table 7 is moved by the X direction table moving mechanism 8a so that the upper punch 1 comes inward by Xp toward the center of the quadrangular pyramid as shown in FIG. , The upper punch 1 is moved downward by the movement pitch Zp in the Z direction by the upper tool support vertical movement mechanism 5, and the (N + 1) th round movement of the table 7 is moved in the X and Y directions. By setting the movement amount to (L-2 × Xp), the angle θ of the side surface of the quadrangular frustum shape 14 can be arbitrarily set.
[0027]
Similarly to the above, the lower punch 2 is brought into contact with the workpiece 11, the lower punch 2 is moved upward in the Z direction by the lower tool support portion vertical movement mechanism portion 6, and fixed by the clamp 10 and the fixing jig 15. The workpiece 11 is moved around by the X-direction table moving mechanism 8a and the Y-direction table moving mechanism 8b of the table 7, and as shown in FIGS. A truncated pyramid shape can be formed.
[0028]
Next, the case where it shape | molds using the upper punch 1 and the lower punch 2 simultaneously is demonstrated using FIG. FIG. 5A is a view of the quadrangular frustum shape of FIG. 3A as viewed from above in the Z direction when the upper punch 1 and the lower punch 2 are formed. However, the table 7 and the clamp 10 are not shown. FIG.5 (b) is HH 'sectional drawing in Fig.5 (a). Here, when forming a convex shape downward in the Z direction, movement of the upper punch 1 in the Z direction by the upper tool support portion vertical movement mechanism 5 and table 7 by the X direction table movement mechanism 8a and the Y direction table movement mechanism 8b. This movement is the same as in FIG.
[0029]
In the forming method shown in FIG. 5, the lower punch 2 is supported from the lower surface of the workpiece 11 instead of using the back plate 17 for suppressing deformation other than the quadrangular pyramid shape as used in the case of FIG. 4. Used as a material. That is, the lower tool 2 supports the lower tool in the X direction in conjunction with the movement of the table 7 in the X and Y directions so that the upper tip g of the lower punch 2 moves along the outer contour of the truncated pyramid shape formed on the workpiece 11. The lower punch 2 is moved in the X and Y directions by the part moving mechanism 9a and the Y direction lower tool supporting part moving mechanism 9b. When the lower punch 2 is moved in the X and Y directions, and the line connecting the centers of the upper punch 1 and the lower punch 2 is perpendicular to the moving direction of the table 7, the lower punch 2 is moved in the X and Y directions. Move.
[0030]
For example, in the quadrangular frustum shape of FIG. 3a, the lower punch 2 does not move in the X and Y directions when forming the straight portion, but the direction of movement from the X direction to the Y direction or from the Y direction to the X direction. 5 (b), the center pitch of the upper punch 1 and the lower punch is kept at the distance f when the circular movement starts to move, and the lower punch moves along the outer contour portion. As shown in FIG. 5A, the table 7 is moved while moving the arc from the point E to the point F by the X direction lower tool support part moving mechanism 9a and the Y direction lower tool support part moving mechanism 9b.
[0031]
That is, when the ratio of the amount of movement in the X direction and the Y direction changes in the movement of the table 7, the lower punch 2 moves in the X and Y directions, and the upper punch 1 and the direction vector of the table 7 move. Control is performed so that the lower punch is moved so that the line connecting the center lines of the lower punch 2 is a right angle.
[0032]
By performing the above operation, the shell shape can be formed even when the back plate 17 in FIG. 4 is not provided.
[0033]
Next, differences between the conventionally known molding apparatus and molding method of Example 1 and the molding apparatus and molding method of the present invention will be described by taking the molding method of the three-dimensional shell shape shown in FIG. 6 as an example.
[0034]
6A and 6B are perspective views of a truncated cone that is an example of a molded product. 6 (a) has a circular top 25A having a diameter of 2L at the center, an inclined portion 25B inclined at an angle θ with respect to a horizontal plane outside the top 25A, and an outer side of the inclined portion 25B. Has a flange portion 25C parallel to the horizontal plane. The truncated cone 26 in FIG. 6B has a circular top portion 26A having a diameter L at the center, an inclined portion 26B that is inclined at an angle θ with respect to a horizontal plane outside the top portion 26A, and an outer side of the inclined portion 26B. Has a flange portion 26C parallel to the horizontal plane.
[0035]
First, the characteristics when the truncated cone 25 and the truncated cone 26 shown in FIGS. 6A and 6B are molded in the conventionally known molding apparatus and molding method of Example 1 will be described.
[0036]
When the truncated cone 25 of FIG. 6A is formed, a mold having a head having a circular cross section and a diameter of 2 L is required in order to support the circular top 25A from the inside at the time of forming. Similarly, when the truncated cone 26 of FIG. 6B is molded, a mold having a head with a circular cross section and a diameter L is required to support the circular top 26A from the inside during molding. become.
[0037]
Therefore, in order to form the two types of truncated cones shown in FIGS. 6A and 6B, two types of molds are required. Similarly, when molding various 3D shell shapes with different shapes and dimensions at the top of the molded product center, a mold corresponding to the shape and dimensions of the top is required to support the top of the molded product central portion. As a result, mold costs become enormous.
[0038]
Next, in the molding apparatus and molding method of the present invention, a method for molding the truncated cone 25 and the truncated cone 26 shown in FIGS. 6A and 6B will be described with reference to FIGS. FIG. 7A is a view of the truncated cone 25 of FIG. 6A as viewed from above in the Z direction when the upper punch 1 and the lower punch 2 are formed. FIG. 7B is a view of the truncated cone 26 of FIG. 6B as viewed from above in the Z direction when the upper punch 1 and the lower punch 2 are formed. However, the table 7 and the clamp 10 are not shown.
[0039]
First, when the truncated cone 25 shown in FIG. 6A is formed, the upper tool support vertical movement mechanism 5, the lower tool support vertical movement mechanism 6, and the X-direction table movement with respect to the fixed work 11. The upper punch 1 is moved to the forming start position A shown in FIG. 7A by the mechanism 8a, the Y direction table moving mechanism 8b, the X direction lower tool support moving mechanism 9a, and the Y direction lower tool support moving mechanism 9b. 2 is similarly positioned at the molding start position a. At the positions A and a, the lower end of the upper punch 1 and the work 11 and the upper end of the lower punch 2 and the work 11 are in contact with each other. FIG. 8A is a sectional view in the X direction passing through the center of the upper punch in this state. Next, at the position a, the lower tool support part vertical movement mechanism 6 moves the lower punch 2 upward in the Z direction by Zp. FIG. 8B is a sectional view in the X direction passing through the center of the upper punch in this state. Subsequently, the upper punch 1 is moved by the X-direction table moving mechanism 8a and the Y-direction table moving mechanism 8b so as to draw an arc having a diameter of 2L + 2m from the position A to B in FIG. At the same time, the lower punch 2 is moved by the X-direction lower tool support moving mechanism 9a and the Y-direction lower tool support moving mechanism 9b so that the lower punch 2 comes to the position b in FIG. When the lower punch 2 is moved in the X and Y directions, and the line connecting the centers of the upper punch 1 and the lower punch 2 is perpendicular to the moving direction of the table 7, the lower punch 2 is moved in the X and Y directions. Move.
[0040]
Similarly, one cycle of the movement of the table 7 in the X and Y directions and the movement of the lower punch 2 in the X, Y, and Z directions linked to the ABCDA of the upper punch 1 is repeated N times a predetermined number of times. Thus, a truncated cone shape having a depth in the Z direction of N × Zp is formed. At this time, after the n-th cycle is finished, the table 7 and the lower punch 2 are moved so that the lower punch 2 comes relatively inward by Xp toward the center of the truncated cone as shown in FIG. At the same time, after moving in the X direction, the lower tool support portion vertical moving mechanism 6 moves the lower punch 2 relative to the upper punch 1 in the Z direction by the moving pitch Zp. Next, in the (n + 1) th cycle, the angle θ of the side surface of the truncated cone 25 is arbitrarily set by making the horizontal distance between the upper punch 1 and the lower punch 2 relatively larger by Xp than the nth round. be able to.
[0041]
Next, in the case of forming the truncated cone 26 shown in FIG. 6B, unlike the case of forming the truncated cone 25, the table 7 is moved to the upper punch by the X direction table moving mechanism 8a and the Y direction table moving mechanism 8b. 1 is moved so as to draw an arc having a diameter of L + 2 m from A ′ to B ′ in FIG. At the same time, the lower punch 2 is moved by the X direction lower tool support moving mechanism 9a and the Y direction lower tool support moving mechanism 9b so that the lower punch 2 comes to the position b 'in FIG. 7B. When the lower punch 2 is moved in the X and Y directions, and the line connecting the centers of the upper punch 1 and the lower punch 2 is perpendicular to the moving direction of the table 7, the lower punch 2 is moved in the X and Y directions. Move. Other than that, the truncated cone 26 can be molded by the same procedure as when the truncated cone 25 is molded.
[0042]
According to the present invention, by simultaneously controlling the relative movement amount of the lower punch 2 with respect to the workpiece 11, a three-dimensional shell shape having an arbitrary shape and size can be formed, and the die cost is reduced. it can.
[0043]
Further, the sequential stretch forming apparatus according to the method of the present invention has an upper tool support portion vertical movement mechanism portion 5 and a lower tool support portion vertical movement mechanism portion 6 around the axes of the upper punch 1 and the lower punch 2 as shown in FIG. Of the upper punch 1 by controlling the rotation angle of the upper punch 1 and the lower punch 2 when the table 7 is moved and the lower punch 2 is moved. 10A, or when the shape of the lower punch 2 is a non-axisymmetric shape shown in FIG. 10B, sequential overmolding without the back plate 17 is possible. . Further, molding is possible also when the upper punch 1 has a roller shape having the directionality shown in FIG.
[0044]
Further, in the present molding apparatus, a vibration adding unit 19 having a function of giving minute vibrations to the upper punch 1 and the lower punch 2 can be attached.
[0045]
In the sequential overhang forming apparatus according to the present invention, the cutting tool 20 and the laser torch part 21 shown in FIGS. 9B and 9C can be attached to the upper tool support part 3 and the lower tool support part 4. And equipped with a tool holder for storing a plurality of upper punches 1, lower punches 2, cutting tools 20 and laser torches 21 having different shapes, and automatically changing them, and forming as a forming punch and a drilling cutting tool, As shown in FIG. 12, it is possible to form a three-dimensional shell shape 23 in which a fixed portion of the workpiece 11 having the hole 22 and its peripheral portion are removed.
[0046]
A specific example for forming the quadrangular frustum shape shown in FIG. 3A will be described below.
[0047]
The workpiece is aluminum (A1050) having a plate thickness of 1.0 mm, and L = 300 mm in FIG. The upper punch 1 and the lower punch 2 have a hemispherical tip and a diameter of 10 to 20 mm. The angle θ of the side surface of the quadrangular frustum shape 13 is 45 degrees.
[0048]
The specific dimensions and control mechanism of the apparatus will be described with reference to FIGS. The dimensions will be described with reference to the symbols in FIGS. 1 and 2. The dimensions of the apparatus main body are W = 3600 mm, H = 2200 mm, K = 2900 mm, and the dimensions of the table 7 are I = 1900 mm and J = 1000 mm. The amount of movement of the table 7 is 1500 and 800 mm in the X and Y directions, respectively, and the amount of movement of the lower tool support 4 in the X and Y directions is 100 and 100 mm, respectively, and the upper tool support 3 and the lower tool support 4 in the Z direction. Each moving amount is 150, 100 mm. A moving mechanism combining a servo motor and a ball screw is used at the rear of the moving machine, and the rotation of the servo motor is simultaneously controlled by a machine controller using a personal computer at a high speed.
[0049]
In the present embodiment, the configuration, dimensions, molded product dimensions, molded product shape, molded product punch shape, molded product punch size of the sequential stretch molding apparatus are shown as described above. It is not a thing. Further, in the forming method, the Z-direction depth Zp is moved by the upper punch 1 at a fixed position. However, the Zp movement is performed at a different position for each turn, and the punch 1 is moved in the Z direction. However, the operation of moving the table 7 may be performed.
[0050]
【The invention's effect】
The sequential stretch forming apparatus according to the present invention includes a moving table in the X and Y directions on the processing table, a moving mechanism in the Z direction on the tool support that supports the upper punch and the lower punch, and a processing table on the lower tool support. By providing a moving mechanism with a small moving amount compared to the moving amount of the metal plate, it is possible to process overhanging from both the upper and lower sides of the metal plate and to offset the upper and lower punches and simultaneously use them for forming Since the lower tool support part can be moved in the X and Y directions, it is relatively inexpensive and compact as a device for moving the upper punch and lower punch independently of the workpiece. realizable.
[0051]
In addition, by providing the tool support with a rotation angle control and vibration addition mechanism, it is possible to significantly reduce the frictional force with the workpiece surface that occurs during punch movement, and to suppress scuffing on the surface of the molded product. .
[0052]
Furthermore, a cutting tool and a laser torch part can be attached to the tool support part, and a three-dimensional shell shape with a complicated shape can be formed by equipping a tool holder with automatic control and forming a hole with a predetermined shape used at the time of molding. The fixed support plate having the shape can also be manufactured by this forming apparatus.
[Brief description of the drawings]
FIG. 1 is a front view of a sequential stretch forming apparatus that is an embodiment of the method of the present invention.
FIG. 2 is a side view of a sequential stretch forming apparatus which is an embodiment of the method of the present invention.
FIGS. 3A to 3D are a perspective view and a sectional view of a square frustum shape formed by using the apparatus of the present invention.
FIG. 4A is a perspective view of a sequential overmolding portion according to the apparatus of the present invention, and FIGS. 4B to 4D are horizontal sectional views of the molding portion.
FIG. 5 is a plan view (a) and sectional views (b) and (c) showing a forming procedure of forming using an upper punch and a lower punch at the same time.
6A and 6B are perspective views of a frustum shape formed by using the device of the present invention.
FIGS. 7A and 7B are plan views showing a molding procedure of molding using the upper punch and the lower punch at the same time. FIGS.
FIGS. 8A to 8C are cross-sectional views showing a molding procedure of molding using the upper punch and the lower punch at the same time.
FIGS. 9A to 9C are front views of an upper tool support according to another embodiment of the present embodiment.
FIGS. 10A and 10B are a front view and a cross-sectional view of a punch according to another embodiment of the present embodiment.
FIG. 11 is a front view and a sectional view of a punch according to another embodiment of the present embodiment.
FIG. 12 is a perspective view of a square frustum shape formed by a forming apparatus according to another embodiment of the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper punch, 2 ... Lower punch, 3 ... Upper tool support part, 4 ... Lower tool support part,
5 ... Upper tool support part vertical movement mechanism part, 6 ... Lower tool support part vertical movement mechanism part,
7 ... table, 8a ... X-direction table moving mechanism,
8b ... Y direction table moving mechanism, 9a ... X direction lower tool support moving mechanism,
9b ... Y direction lower tool support part moving mechanism part, 10 ... Clamp, 11 ... Workpiece,
12 ... Base frame, 13 ... Work part outside the shell-shaped part,
DESCRIPTION OF SYMBOLS 14 ... Square frustum shape shape | molded in the workpiece | work 11, 15 ... Fixing jig, 16 ... Step part, 17 ... Fixed support plate, 18 ... Rotation control mechanism, 19 ... Vibration addition unit,
20 ... Cutting tool, 21 ... Laser torch, 22 ... Hole,
23 ... Square pyramid shape taken out by cutting, 24 ... Remaining workpiece after cutting the forming part, 25 ... Frustum, 25a ... Top part of the truncated cone, 25b ... Inclined part of the truncated cone,
25c: flange portion of the truncated cone, 26: truncated cone, 26a: top of the truncated cone,
26b: an inclined portion of the truncated cone, 26c: a flange portion of the truncated cone,
27: Non-axisymmetric punch, 28: Non-axisymmetric punch, 29 ... Roller punch having directionality.

Claims (3)

A table having a clamping mechanism for placing a metal plate and clamping the periphery, and a table movable in the XY plane;
An upper punch driving means that is located above the table, holds the upper punch, and drives the upper punch vertically with respect to the table;
A lower punch driving means that is positioned below the table and holds the lower punch, and is capable of driving the lower punch in the vertical direction and the XY direction with respect to the table;
The tip of the upper punch is brought into contact with and moved along the contour of the bottom of the three-dimensional shell shape formed on the metal plate, and the top of the three-dimensional shell shape is formed on the metal plate of the tip of the lower punch And a control means for controlling the table and the driving means in conjunction with each other so as to contact and move along the contour of the metal sheet. 2. A metal sheet sequential stretch forming apparatus according to claim 1 , wherein either or both of the upper punch driving means and the lower punch driving means have a minute vibration generating mechanism. 2. A metal sheet sequential stretch forming apparatus, wherein either or both of the upper punch driving means and the lower punch driving means according to claim 1 are provided with a rotation control mechanism for controlling a rotation angle of the punch. .

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