JP2003181552A - Sequential molding equipment - Google Patents

Abstract

(57) [Summary] [Purpose] In conventional sequential molding, since a rod-shaped pressing member moves while being pressed against the surface of a plate material, friction may cause a defective shape such as a processing mark or waving in a moving direction. Therefore, such a problem is prevented. [Structure] A lower pressing member 11 formed as a male type is disposed below a horizontally placed plate material 13 so as to be vertically movable, and a bar-shaped upper pressing member 17 is vertically disposed vertically. It is arranged to be movable in three axial directions. First, the lower pressing member 1
1 is raised and pre-drawn, and then the upper pressing member 17 is pressed.
Is lowered, and the tip is moved while being pressed against the plate material 13 to form details. At this time, the upper pressing member 1
7 is pressed and moved while being slightly vibrated in any of two or three directions of up, down, left, right, front and rear, thereby forming the sheet material 13 without leaving any troubles such as processing marks and waving in the moving direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This application is directed to a shell shape or the like by relatively moving a plate member and a pressing member while pressing a rod-shaped and male or female pressing member against a plate member made of iron or light metal. The present invention relates to an apparatus used in a method for molding a predetermined three-dimensional shape (this molding method will be referred to as sequential molding). In the present invention, arranging the plate members so that their planes are horizontal is referred to as horizontal placement. Also,
Two axes that are orthogonal to each other in the horizontal plane are XY, and an axis that is orthogonal to each of these axes and is parallel to the vertical line is Z. Furthermore, the three orthogonal axes refer to these three axes of XYZ.

[0002]

2. Description of the Related Art Such sequential forming is well known. For example, in Japanese Unexamined Patent Publication (Kokai) No. 5-42328, four sides of a plate material are held horizontally by creases, and a male lower pressing member is pushed up from below to make a rough outline. Pre-drawing into a desired shape, moving the plate in the XY 2-axis directions orthogonal to each other in the horizontal plane while pressing the rod-shaped upper pressing member from above, and moving the pressing member in the vertical Z-axis direction. It is designed to mold a three-dimensional shape.

[0003]

By the way, when the surface of the plate material is moved while pressing the rod-shaped pressing member as in the above-mentioned conventional example, a streak-like processing mark is formed on the surface of the plate material due to friction. There is. Further, due to the accumulation of processing strains, there may be a case in which a defective shape in which the pressing member is wavy in the moving direction is exhibited. Such waviness is particularly likely to occur in a thin plate material. Therefore, an object of the present invention is to prevent the generation of processing marks and defective shapes by the rod-shaped pressing member.

[0004]

In order to solve the above-mentioned problems, the invention of claim 1 relating to the successive forming apparatus of the present application is such that the plate member and the pressing member are three-dimensionally pressed while pressing the pressing member against the surface of the plate member whose periphery is supported. In a device for successive molding that obtains a predetermined three-dimensional shape by relatively moving in the direction,
It is characterized in that the pressing member is rod-shaped and is pressed while being slightly vibrated.

According to the invention of claim 2, in the above claim 1,
The minute vibration direction of the pressing member is a combination of a plurality of directions including an axial direction of the pressing member and a direction intersecting with the axial direction.

[0006]

According to the first aspect of the present invention, since the rod-shaped pressing member moves on the surface of the plate material while vibrating minutely, it is possible to form the plate material so as not to leave a defective shape such as a processing mark or corrugation. it can. Moreover, since the plate material is hit with the tip of the rod-shaped pressing member, the molding portion can be strengthened by work hardening,
This is particularly advantageous for forming thin plates.

According to the second aspect of the present invention, since the rod-shaped pressing member is combined in a plurality of directions including the axial direction and the direction intersecting with the axial direction, it is possible to more reliably prevent the above-mentioned processing marks and defective shapes. Also, the higher the degree of randomness in the vibration direction, the greater the effect.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment will be described below with reference to the drawings. FIG. 1 is a perspective view of an automobile hood which is a product molded by this embodiment, FIG. 2 is a front view of a molding apparatus, FIG. 3 is an enlarged sectional view of a preliminary drawing process, and FIG. 4 is a plan view showing a pressing portion of a plate material. FIG. 5, FIG. 5 is a diagram showing a molding method in the plane of the convex portion, FIG. 6 is an enlarged cross-sectional view of the tip portion of the rod-shaped pressing member, and FIG.

In FIG. 1, a bonnet 1 is a sequentially formed product of the present invention, and is formed into a three-dimensional shape which is the surface shape of an automobile bonnet from an iron plate. The upper surface 2 of the bonnet 1 has a gently curved surface, and a part thereof is provided with a convex portion 3 that is upwardly convex and has a substantially elliptical shape in a plan view.
There are multiple openings. The periphery forms a flange-shaped peripheral wall 5 and is formed into a three-dimensional shell shape as a whole.

As shown in FIGS. 2 to 4, the sequential molding device 6
Is installed on an installation unit 7 such as a floor. On the installation unit 7, a column-shaped support 8 is provided, and a cross beam 9 is laid on the top of the support 8. A lower pressing member 11 is supported on the installation portion 7 via a hydraulic mechanism 10 so as to be vertically movable in the Z direction. A work support base 12 having a substantially quadrangular frame shape in a top view is provided on the installation portion 7 above the lower pressing member 11, and a plate member 13 is placed on the upper end of the work support base 12 to hold the wrinkle having a substantially quadrangular frame shape from above. It is pressed down by 14 and the clamp 15.

As shown in FIG. 4, the wrinkle retainer 14 has a pair of substantially U-shapes, and is formed in a substantially frame shape which is opposed to each other and overlaps the periphery of the plate member 13. Alternatively, the periphery of the plate member 13 is pressed by making it slidable in parallel with the plane of the plate member 13.

The clamp 15 is similarly constructed to be tiltable and slidable. Also, in the case of slide type,
It is also possible to rotate in a plane parallel to the plate member 13 about the axis in the Z-axis direction.

The wrinkle retainer 14 and the clamp 15
Alternatively, the pressing adjustment control mechanism composed of a microcomputer or the like can adjust the pressing force with respect to the periphery of the plate material 13, and the pressing portion can be fed out in accordance with the drawing amount of the plate material 13.

A window hole-shaped space 16 is formed inside the work support 12, and a portion of the plate material 13 facing the space 16 serves as a molding portion, and the lower pressing member is disposed in the space 16 below the plate material 13. 11 is preformed by rising from below.

On the other hand, above the plate member 13, the upper pressing member 1 is provided.
7 is placed. The upper pressing member 17 has a rod shape, and its axial direction is arranged in the vertical direction, and it can be moved up and down in the Z direction by a hydraulic mechanism 18, and can be moved up and down, left and right, or front and back by a vibrator 19 such as an ultra-low frequency vibrator. Direction, ie X
It vibrates slightly in any two or three directions of the three YZ orthogonal axes. The magnitude of the minute vibration does not matter as long as the tip of the upper pressing member 17 is momentarily separated from the surface of the plate member 13.

The upper pressing member 17 is the first slide table 2
It is suspended and supported by the cross beam 9 through the 0 and the second slide table 21. The first slide table 20 and the second slide table 21 are movable in two orthogonal directions X and Y in a horizontal plane. For example, the second slide table 21 is Y.
The first slide table 20 moves in the X direction. A hydraulic mechanism 18 and a vibrator 19 are provided on the first slide table 20.

The first slide table 20 and the second slide table 21 can be moved by various means such as an air cylinder, a hydraulic cylinder, a servo motor and a linear motor. In the case of a servomotor drive, a ball screw mechanism, a rack and pinion mechanism, etc. are possible. The movement control of the slide table and the lower pressing member 11 and the upper pressing member 17 in the Z-axis direction is performed by a control unit composed of a microcomputer (not shown).

As shown in FIG. 3, the lower pressing member 11 is a simple mold made of concrete or the like, has a male shape, and has an upper surface molding portion 22 corresponding to the upper surface 2 of the bonnet 1 as a product and a convex portion. 3 corresponding to the convex molding portion 23, the vent hole 4
And a peripheral wall forming portion 25 corresponding to the peripheral wall 5.

The lower pressing member 11 independently rises in the preliminary drawing step to draw the plate material 13 into a rough shape. This pre-drawing does not use a male and female mold as in normal press molding, but is performed with one side open, so that in the sudden curvature change part 26 between the upper surface molding part 22 and the convex part molding part 23 or the vent hole molding concave part 24. , The plate material 13 does not follow accurately, and a portion apart from the mold surface occurs.

The upper pressing member 17 can be moved up and down by a hydraulic mechanism 18, and its tip is pressed downward from above toward the plate member 13 to precisely form a portion where the lower pressing member 11 cannot be drawn from the opposite side. .

FIG. 5 shows a method of forming the convex portion 3 with the upper pressing member 17. First, the upper pressing member 17 is pressed against a point P0 on the most center side of the plate member 13 to be formed, and the upper pressing member 17 is pressed. The first and second slide tables 20, 2
With the movement control of 1, the pressing portion is moved so as to draw a closed contour line a in the XY plane.

After returning to the original position, the upper pressing member 17 is once retracted upward, then is displaced radially outward by the pressing area at the tip portion of the upper pressing member 17, and is lowered and pressed a little larger. Contour line b that forms the ellipse of
Draw.

By repeating this until the outer peripheral portion of the convex portion 3 is reached, the convex portion 3 having a predetermined shape is formed along the surface of the sudden curvature change portion 26 accurately. It should be noted that the vent hole forming recess 2
With respect to No. 4, the recess can be formed in the same manner.

FIG. 6 is an enlarged cross-sectional view showing the tip end portion of the upper pressing member 17, in which the ball 27 is rotatably fitted at the tip end and the oil hole 2 formed in the axial direction of the upper pressing member 17.
Lubricating oil is supplied from 8. Thereby, the upper pressing member 17
The sliding causes bottom friction and makes it lighter. However, the tip may not be such a rotating portion, but may be simply spherical.

Next, a method of forming the bonnet 1 according to this embodiment will be described with reference to FIG. First, as shown in FIG. 7A, the plate material 13 is sandwiched between the work support 12 and the wrinkle retainer 14, and is fixed by a clamp (not shown, see FIG. 4).

Next, as shown in FIG. 7B, the lower pressing member 11 is raised in the Z-axis direction by the hydraulic mechanism 10 to move the plate member 1
Pressing against the lower surface of No. 3 and pre-draw forming. As a result, the plate material 13 is roughly squeezed, and the top surface 2 and the top side of the projection 3 and the peripheral wall 5 are formed. However, an unformed portion remains in the abrupt curvature change portion 26 which is the skirt of the convex portion 3 and the vent hole forming concave portion 24.

Therefore, as shown in FIG. 7C, the upper pressing member 17 is lowered from above and pressed against the upper surface of the plate material 13 such as the abrupt curvature change portion 26 and the vent hole forming concave portion 24 to form the successive forming. By performing the above, it is possible to form the accurate projection 3 and the recess 30 along the ventilation hole forming recess 24.

Subsequently, as shown in FIG. 7D, the laser device 3 is attached to the plate member 13 removed from the work support 12 or the like.
1 is used to cut the peripheral wall 5 part and presser flange 3
2 is cut off, and the bottom side 33 of the recess 30 is cut to open the ventilation hole 4 to obtain the bonnet 1 as a product.

As described above, according to this embodiment, the rod-shaped upper pressing member 17 is pressed by the vibrator 19 at a proper frequency such as an ultra-low frequency while being slightly vibrated in any two or three directions of up, down, left and right or front and back. Since it is moved, the plate material 13
It can be formed without leaving any defective shape such as machining marks or waviness in the moving direction on the side.

Moreover, since the plate member 13 is tapped by the tip of the upper pressing member 17, the forming portion can be strengthened by work hardening, which is particularly advantageous in forming a thin plate which lacks strength and is easily deformed. Further, since the frictional force is reduced by minute vibration in any two or three directions of up, down, left and right, or front and back, energy required for moving the pressing member is also small.

The invention of the present application is not limited to the above embodiments, and various modifications and applications are possible within the same principle of the invention. For example, the minute vibration direction of the upper pressing member 17 is not necessarily limited to any combination in the directions of the three orthogonal axes, and the upper pressing member 17 is oscillated by arbitrary radiation in the radial direction around the axis, or in addition to this. It may be a random one in which vibrations in the axial direction and in a direction inclined thereto are combined. The higher the degree of randomness, the less likely it is that machining marks, corrugations, etc. will occur.

Further, the lower pressing member 11 may be a female type as well as a male type. Further, the lower pressing member 11 may be fixed immovably in the Z-axis direction or, conversely, may be movable in the three XYZ orthogonal directions. In addition, the rod-shaped pressing member may be the lower pressing member 11.

[Brief description of drawings]

FIG. 1 is a perspective view of an automobile hood molded according to this embodiment.

FIG. 2 is a front view of a molding device.

FIG. 3 is an enlarged sectional view of an essential part in a preliminary drawing process.

FIG. 4 is a plan view of a plate supporting portion.

FIG. 5 is a diagram showing a method of forming a convex portion.

FIG. 6 is an enlarged cross-sectional view of the tip of the lower pressing member.

[Figure 7] Overall molding process diagram

[Explanation of symbols]

1: bonnet, 2: upper surface, 3: convex portion, 4: vent hole,
5: peripheral wall, 6: sequential forming device, 7: installation part, 10: hydraulic mechanism, 11: lower pressing member, 12: work support table, 1
3: Plate material, 14: Wrinkle retainer, 15: Clamp, 16:
Successive forming device, 17: upper pressing member, 18: hydraulic mechanism, 2
4: Vent hole forming concave portion, 26: Curvature sudden change portion

Claims (2)

[Claims] 1. An apparatus for successive molding, wherein a predetermined three-dimensional shape is obtained by relatively moving a plate member and a pressing member in a three-dimensional direction while pressing the pressing member against the surface of a plate member whose periphery is supported. A sequential molding device characterized in that the pressing member has a rod shape and presses while slightly vibrating. 2. The sequential molding apparatus according to claim 1, wherein the minute vibration direction of the pressing member is a combination of a plurality of directions including an axial direction of the pressing member and a direction intersecting with the axial direction.