JPH1094832A - Metallic sheet press-forming method and device therefore - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic sheet press-forming device by which a metallic sheet can efficiently be formed into a spherical shape by using dies which can be manufactured at a low cost. SOLUTION: The metallic sheet 30 is fed by a prescribed pitch in one direction so that the metallic sheet 30 being a work is passed through the gap between a male die 10 having a projecting face 12 and a female die 20 having recessed face 22 and formed corresponding to the male die 10, the male die 10 and the female die 20 are moved to be nearer to and away from each other corresponding to the feed movement of the metallic sheet 30 to press-form the metallic sheet 30 into a curved face of a spherical shape. The metallic sheet 30 to be pressed is fed while being passed through the gap between the male die 10 and the female die 20 by a feed mechanism 40 with a prescribed pitch corresponding to a press operation by a press mechanism. Also, the feed mechanism 40 is equipped with a control means 50 for feeding the metallic sheet 30 by an arbitrary feeding condition such as a definite pitch. Consequently, the metallic sheet 30 can appropriately be formed into the spherical shape having the uniformly bent curved surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sheet metal press forming method and a sheet metal press apparatus.

[0002]

2. Description of the Related Art Conventionally, in order to form a metal plate into a spherical shape by using a mold, the metal plate to be formed is entirely pressed by upper and lower dies. In the case of small-volume production, a desired curved surface is formed by manual beating. In order to form a metal plate into a spherical shape, unlike a gutter-like shape whose cross section in one direction is formed in a curved shape,
It is necessary to form the cross section in two orthogonal directions so as to be both curved. That is, a metal plate (thin plate) like a gutter
Can be easily formed by a roller (press) device, but cannot be easily formed into a spherical shape by using a roller (press) device.

[0003]

The productivity cannot be improved by manual production as in the past, and mass production is possible by press working, but a large die is required. Therefore, there is a problem that the manufacturing cost cannot be reduced except for mass-produced products.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet metal press device capable of forming a metal plate into a spherical shape with high production efficiency by using a metal mold that can be manufactured at low cost.

[0005]

The present invention has the following arrangement to achieve the above object. That is, the present invention
The metal plate is fed in one direction at a predetermined pitch between a male mold having a convex surface and a female mold formed corresponding to the male mold and having a concave surface so that a metal plate serving as a work passes. The male mold and the female mold are relatively moved toward and away from each other in accordance with the feeding operation of the metal plate, and the metal plate is press-formed into a spherical curved surface.

Further, the present invention provides a male mold having a convex surface, a female mold formed corresponding to the male mold and having a concave surface, and a metal plate serving as a workpiece between the male mold and the female mold. And a feeding mechanism for feeding the metal plate at a predetermined pitch in one direction so that the metal plate passes, and a male die and a female die in accordance with the feeding operation of the metal plate so as to press-mold the metal plate into a spherical curved surface. There is also a sheet metal press device provided with a press mechanism for relatively moving and moving the plate.

The male mold has a convex cross section cut in the feed direction, and has a convex cross section cut in a direction perpendicular to the feed direction. The female mold has a cut cross section in the feed direction. The metal plate can be suitably formed into a spherical shape because the cross-sectional shape of the metal plate is concave and the cross-sectional shape cut in a direction perpendicular to the feed direction is also concave.

Further, since the male mold and the female mold are formed by laminating a large number of plate members, the manufacturing cost of the mold can be greatly reduced.

Further, the feed mechanism includes a control means for feeding the metal plate at a constant pitch, so that the metal plate can be suitably formed into a spherical shape having a curved surface that is uniformly bent.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a front view showing one embodiment of a sheet metal press apparatus according to the present invention. FIG. 2 shows a press die (a male mold 10 and a female mold 2) of FIG.
FIG. 3 is a front view showing details of (0), and FIG. 3 is an end view taken along line AA of FIG. FIGS. 2 and 3 show a state in which a metal plate as a work is inserted so as to pass between the male mold 10 and the female mold 20. 10 is male type, convex surface 1
2 The convex surface 12 has a convex sectional shape cut in the feed direction as shown in FIG. 3 and also has a convex sectional shape cut in a direction perpendicular to the feed direction as clearly shown in FIG. Is formed. Also, this male mold 10
Although it is possible to form a block made of a steel material by cutting, it can be formed by laminating a large number of plate materials (for example, a steel plate having a thickness of about 5 mm) and welding the side surfaces as in the present embodiment. . When the plate members are formed by lamination, the form of the male mold 10 can be easily manufactured, and the manufacturing cost can be greatly reduced.

Reference numeral 20 denotes a female mold, which is formed corresponding to the male mold 10 and has a concave surface 22. The concave surface 22 has a concave sectional shape cut in the feed direction as shown in FIG. 3 and also has a concave sectional shape cut in a direction perpendicular to the feed direction as clearly shown in FIG. Is formed. Also,
The female die 20 can be formed by cutting a block made of a steel material like the male die 10 by cutting. However, as in the present embodiment, a plate material (for example, a steel plate having a thickness of about 5 mm) is used.
Can be formed by laminating a large number of layers and welding them on the side surfaces. In this case, the form of the female mold 20 can be easily manufactured, and the cost can be significantly reduced. As described above, by forming the male mold 10 and the female mold 20 so as to have curved surfaces in two orthogonal directions, the metal plate 30 can be suitably formed into a spherical shape.

Reference numeral 32 denotes a press mechanism for relatively moving the male mold 10 and the female mold 20 so as to press-mold the metal plate 30 sandwiched between the male mold 10 and the female mold 20. As shown in FIG. 1, the press mechanism 32 includes a base portion 34 and a vertically moving portion 36 that is moved toward and away from the base portion 34. Is fixed, and the vertical
The male mold 10 is fixed to the base. The vertical moving part 36 is the base part 3
4. Both pillar portions 35a, 35 of a gate-shaped portion 35 provided integrally with
The guide b is provided so as to be able to reciprocate up and down while being guided. The male mold 10 is an upper mold arranged above, and the female mold 20 is a lower mold arranged below. The male mold 10 is vertically moved (arrow B) with respect to the female mold 20 by the press mechanism 32. Direction). Accordingly, since the pressing direction matches the direction of gravity, the press mechanism 32 and the entire apparatus can be in a well-balanced form. Further, a conventional general press machine can be used, and the male mold 10 and the female mold 20 can be easily mounted on the press machine. As a power device of the press mechanism 32, for example, a hydraulic cylinder device 38 can be used.

Reference numeral 40 denotes a feed mechanism (see FIG. 3), which is a metal plate 3 inserted between the male mold 10 and the female mold 20 and pressed.
0 is sent at a predetermined pitch in accordance with the press operation by the press mechanism 32. That is, the metal plate 30 is fed at a predetermined pitch during the mold open state in which the male mold 10 and the female mold 20 are separated from each other until one pressing (pressing) operation is completed and the next pressing operation is started. is there. In addition, the feed mechanism 40 includes the control unit 50 that feeds the metal plate 30 under arbitrary feed conditions such as a constant pitch, so that the metal plate 30 can be suitably formed into a spherical shape having a curved surface that is uniformly bent. Can be.
As the feed mechanism 40 including the control means 50, for example,
It is sufficient to provide a mechanism (for example, a rack and pinion movement mechanism) that causes the servo motor to rotate a predetermined rotation under computer control and converts the rotation to a linear movement. Although a specific mechanism of the feed mechanism 40 is not shown, the metal plate 30 may be fed by, for example, contacting and pressing the rear end surface of the metal plate 30. Further, in order to properly insert the metal plate 30 between both inner side surfaces 24a and 24b of the concave portion 24 of the female mold 20, a guide means in a feeding direction may be provided.
The inner surfaces 24a and 24b also function as guide surfaces for the vertical movement of the male mold 10.

Next, a process of forming a molded product having a curved surface as shown in FIG. 5 by the sheet metal press apparatus having the above configuration will be described with reference to the drawings. FIG. 4 is a perspective view showing a state where a metal plate is being pressed. First, a band-shaped flat metal plate cut to a predetermined width,
The feed mechanism 40 is inserted into the recess 24 of the female mold 20,
The paper is intermittently fed at a predetermined pitch so as to pass between the male mold 10 and the female 20. For example, when forming an iron plate having a thickness of 1.6 mm, the sheet is fed at a constant pitch of 5 mm.

The male die 10 is reciprocated (moved toward and away from) the female die 20 by the press mechanism 32 in accordance with the feed at a predetermined pitch, so that the male die 10 pierces the female die 20 as a receiving member. Work, the metal plate 30 as a work
Is partially pressed. Then, the press working process is performed for each feed, and the metal plate 30 is sequentially pressed by the feed pitch so that the metal plate 30 is pressed by the male mold 10.
When it is discharged from between the female and female 20, a molded article having a curved surface as shown in FIG. 4 is formed. A molded article having a curved surface formed in this manner is used, for example, as a corner member of a building having a curved corner. It is not necessary for the feeding step and the pressing step to correspond one-to-one. For example, an irregular processing method such as feeding several times in small increments and pressing once may be used.

Since press molding is performed for each pitch, a trace may remain. However, the trace is formed on the surface and is generally formed into a smooth curved surface. A press die formed by simply cutting a sheet material into a predetermined shape and laminating a large number of them easily leaves traces on the surface of the metal plate, but a press die whose pressing surface is formed smoothly by cutting processing If so, the generation of traces by pressing can be prevented as much as possible. As described above, the present invention has been described variously with reference to preferred embodiments. However, the present invention is not limited to the embodiments, and it is needless to say that many modifications can be made without departing from the spirit of the invention. That is.

[0017]

According to the present invention, a male mold having a convex surface,
The metal plate is fed at a predetermined pitch in one direction so that a metal plate serving as a work passes between the female die formed corresponding to the male die and having a concave surface, and the feeding operation of the metal plate is performed. The metal plate can be press-formed into a molded product having a desired spherical curved surface by relatively moving the male mold and the female mold toward and away according to. The press die according to the present invention is smaller and simpler in shape than conventional ones, and can be manufactured at low cost. Therefore, according to the sheet metal press device including the press die, the manufacturing cost of metal plate processing is reduced. It has a significant effect of being able to do it. Further, according to the sheet metal press apparatus according to the present invention, it is possible to automate a process of forming a metal plate into a spherical shape while having a simple configuration, and to achieve a remarkable effect of improving production efficiency.

[Brief description of the drawings]

FIG. 1 is a front view of a sheet metal press apparatus showing one embodiment of the present invention.

FIG. 2 is a front view of the press die of FIG.

FIG. 3 is an end view taken along line AA of FIG. 2;

FIG. 4 is a perspective view illustrating a use state of the embodiment of FIG. 1;

FIG. 5 is a perspective view showing the shape of a product formed by the apparatus of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Male type 12 Convex surface 20 Female type 22 Concave surface 30 Metal plate 32 Press mechanism 38 Hydraulic cylinder device 40 Feed mechanism

Claims (5)

[Claims] 1. A metal mold having a convex surface and a female mold having a concave surface formed corresponding to the male mold so that the metal plate, which is a workpiece, passes in one direction so that the metal plate passes through the work. Feeding at a predetermined pitch, moving the male and female dies relatively toward and away in accordance with the feeding operation of the metal plate, and press-forming the metal plate into a spherical curved surface; Method. 2. A male mold having a convex surface, a female mold formed corresponding to the male mold and having a concave surface, and a metal plate as a work passing between the male mold and the female mold. A feeding mechanism that feeds the metal plate at a predetermined pitch in one direction, and press-molding the metal plate into a spherical curved surface so that the male die and the female die are relatively moved in accordance with the feeding operation of the metal plate. A sheet metal press apparatus comprising: a press mechanism for moving the sheet metal. 3. The male mold has a convex cross-sectional shape cut in a feed direction, and has a convex cross-sectional shape cut in a direction perpendicular to the feed direction. 3. The sheet metal press according to claim 2, wherein the cross-sectional shape is concave, and the cross-sectional shape cut in a direction perpendicular to the feeding direction is also concave. 4. The sheet metal press according to claim 2, wherein the male mold and the female mold are formed by laminating a large number of plate members. 5. The sheet metal press according to claim 2, wherein the feed mechanism includes a control unit that feeds the metal plate at a constant pitch.