JPH1133633A - Manufacture of formed part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently manufacture the formed part secured a high precise shape and dimension. SOLUTION: When an aluminum plate 50 is extruded toward the roll 14 of a die 12, one end side in the width direction of the aluminum plate 50 is continuously and plastically deformed following the outer shape of the roll 14, whereby the intermediate member 52 secured the shape of the cross section is manufactured. Plural formed parts 60 secured the dimension are manufactured by machining the outer diameter of the intermediate member 52 using laser beam machining or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a molded article, and more particularly to a method for producing a molded article having a plastically deformed portion from one end to another end.

[0002]

2. Description of the Related Art Conventionally, a press die has been used to form an end of a sheet metal so as to be recessed into a predetermined shape.

FIG. 4 shows a mold 80 as an example used for such molding. This mold 80
It comprises a lower die 86 having a concave portion 88 and an upper die 82 which is arranged to face the lower die 86 and approaches and separates from the lower die 86. The upper die 82 is provided with a convex portion 84 which is projected in conformity with the shape of the concave portion 88 of the lower die 86.

An aluminum plate 90 is disposed between the lower die 86 and the upper die 82 of the die 80. When the upper die 82 approaches the lower die 86 and presses the aluminum plate 90, the convex portions 84 and The aluminum plate 90 is plastically deformed according to the shape of the concave portion 88, and a molded product 92 having a specific shape is formed. As a result, one molded product 92 is formed, and a plurality of molded products 92 can be manufactured by repeating this operation.

[0005]

However, in the above-described press die 80, when forming the aluminum plate 90, the aluminum plates 90 are disposed one by one between the upper die 82 and the lower die 86, and are pressed at once. Therefore, it is difficult to match the force and the forming position at the time of molding in all the aluminum plates 90. Also, depending on the shape of the molding, it may be difficult to ensure the accuracy of the molding shape by press working. In some cases, the shape is corrected in order to ensure molding accuracy, but in this case, the number of manufacturing steps increases. In addition, in order to obtain one molded product, both the upper mold 82 and the lower mold 86 must be manufactured, which increases the manufacturing cost.

The present invention has been made in view of the above-mentioned facts, and has as its object to provide a method for producing a molded article capable of efficiently producing a molded article having high molding accuracy.

[0007]

According to the first aspect of the present invention,
A molded article production method for producing a molded article having a plastically deformed portion from one end to another end, wherein a rotating body is positioned at one end of a plastic member, and a predetermined pressing force is applied to the plastic member. While rotating the rotating body in a state where it is applied to the rotating body, the rotating body and the plastic member are moved relative to each other, and the rotating body is moved to the other end of the plastic member, and the outer shape of the rotating body And forming a plastically deformed portion depressed in accordance with the above.

According to the present invention, the rotating body and the plastic member are moved relative to each other while rotating the rotating body while applying a predetermined pressing force to the plastic member. Since the recess is made in accordance with the outer shape of the rotating body, the cross-sectional shape of the plastically deformed portion of the plastic member can be secured based on the outer shape of the rotating body. Thus, it is not necessary to separately provide a step of correcting the shape in order to secure the accuracy of the cross-sectional shape. In addition, since the rotating body rotates while applying a predetermined pressing force to the plastic member to form the plastic deformation portion, the plastic deformation portion having the same cross-sectional shape can be continuously formed. Furthermore, since the plastic deformation portion has a shape corresponding to the outer shape of the rotating body, when changing the shape, it is sufficient to change the shape of the rotating body, and it is not necessary to manufacture a mold, and The manufacturing cost can be kept lower than in the case of manufacturing. Therefore, it is possible to obtain a molded product with high molding accuracy with high production efficiency, and to produce a highly accurate molded product in a short period of time.

The rotating body used here should have an arc surface that is continuous at least in an arc around the rotation axis, as long as it can be secured by rotating the cross-sectional shape of the plastically deformed portion. Can be. Such a rotating body includes a cylindrical or drum-shaped one and an arc-shaped one. Further, the shape of the rotating body may be rectangular, circular, or elliptical in the radial cross section of the rotating body, or may have a more complicated shape, depending on the shape of the plastic deformation portion.

According to a second aspect of the present invention, when a plurality of molded products are obtained from the plastic member, one end of one molded product coincides with the other end of another molded product. It is characterized in that an area is set.

According to the present invention, since the area of the molded article is set in the plastic member so that the ends of the molded article coincide with each other, a plurality of molded articles can be obtained from the plastic member. At this time, by setting the region so that the plastically deformed portion of the molded product is linearly continuous, the rotating body to which a predetermined pressing force is applied continuously forms the plastically deformed portion, so that the same cross-sectional shape is used. A plurality of molded products having the plastically deformed portion can be easily manufactured. Thereby, it is possible to easily obtain a plurality of molded products having high shape and dimensional accuracy from the plastic member. In addition, since a plurality of molded products can be obtained by performing a single rotation by the rotating body, a large number of highly accurate molded products can be efficiently obtained.

According to a third aspect of the present invention, a portion to be processed is set in a strip shape along one side of a thin flat metal plate, and rolling is performed while pressing a roller from one end to the other end of the processed portion. By moving or rotating, the processed portion is formed into a continuous concave portion corresponding to the outer shape of the roller, and is cut so as to be divided into predetermined dimensions in the longitudinal direction of the band-shaped concave portion.

According to the present invention, the portion to be processed of the metal plate is
Rolling or rotating while pressing the roller to form a concave portion corresponding to the outer shape of the roller, and dividing into predetermined dimensions in the longitudinal direction of the concave portion, from the metal plate, has a concave portion corresponding to the outer shape of the roller A plurality of molded articles of a predetermined size can be obtained. Thereby, it is possible to efficiently obtain a molded product in which both the cross-sectional shape and the dimensions are secured with high precision.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a molding machine 10 according to this embodiment.
It is shown. The molding machine 10 is loaded with an aluminum plate 50 as a molding target.

The molding machine 10 is provided with a mold 12 having a roller 14 rotatable in the direction of arrow R. Mold 1
The roller 14 has a U-shaped bracket 16 and a rotating shaft 1.
At 8 it is rotatably mounted.

The cross-sectional shape of the roller 14 in the radial direction is substantially elliptical, and the diameter of the roller 14 is largest at the central portion in the axial direction.

A support shaft 20 is connected to the bracket 16 in the upward direction in FIG.
2 are connected. The elevating unit 22 houses an elevating mechanism (not shown), and is connected to an elevating control unit 24 that controls driving of the elevating mechanism. Lift control unit 2
4 controls the driving of the lifting mechanism to adjust the length of the support shaft 16, whereby the position of the roller 14 in the vertical direction in FIG. 1 is adjusted.

The molding machine 10 is provided with a transport section 26 for transporting an aluminum plate 50 to be molded. The transport section 26 includes an endless belt 30 stretched over a pair of rollers 28, and a pair of holding rollers 32 disposed above the endless belt 30.

The roller 28 around which the endless belt 30 is stretched
Are connected to the transport control unit 34, respectively. The transport control unit 34 controls the rotation of the roller 28 so that the endless belt 30 moves at a predetermined speed in the direction of arrow F.

The endless belt 30 is disposed adjacent to the roller 14, and the pressing roller 32 is connected to the endless belt 3.
0. The position of the pressing roller 32 depends on the moving direction of the endless belt 30 (arrow F).
With respect to the roller 14.

The width of the endless belt 30 is
The width of the endless belt 30 is smaller than the width dimension of the endless belt 30.
When the end in the width direction of 0 is aligned, the other end of the aluminum plate 50 protrudes toward the roller 14 side. For this reason, the other end of the aluminum plate 50 protruding toward the roller 14 can come into contact with the roller 14 disposed on the side of the endless belt 30.

An extruder 36 for extruding the aluminum plate 50 to the molding machine 10 is disposed upstream of the molding machine 10 in the conveying direction. The extruder 36 includes an extruder 38 for extruding the aluminum plate 50 and an extruder 40 for moving the extruder 38 toward the molding machine 10. They are connected by a shaft 42. Extrusion drive 40
Is connected to a drive control unit (not shown), and the push-out drive unit 40 controls the push-out unit 3 in response to an instruction from the drive control unit.
8 is extruded toward the molding machine 10.

An outer diameter processing means (not shown) is disposed downstream of the molding machine 10 in the transport direction. The plastically deformed aluminum plate 50 is guided to the outer diameter processing means. The outer diameter processing means cuts the guided aluminum plate 50 in the width direction so as to have a predetermined size in the transport direction.

The outer diameter processing means can apply all methods usually used for cutting as long as the aluminum plate 50 can be cut into a desired size. For example, laser processing and W / C can be used. No.

The elevation control section 24, the transport drive section 34, and the extrusion control section (not shown) are connected to a controller (not shown). Based on the position of the aluminum plate 50, the controller instructs the elevating control unit 24, the transport drive unit 34, and the extrusion control unit to operate, guides the aluminum plate 50 to the transport unit 26, and controls the height of the mold 12 Is adjusted, and the aluminum plate 50 is formed by the mold 12.

In the molding machine 10, the aluminum plate 50 to be molded is moved by the extrusion section 38 to the transport section 26,
It is extruded into the mold 12 adjacent to this. In the mold 12, the aluminum plate 50 contacts the roller 14 of the mold 12 at one end protruding from the endless belt 30, and the roller 1
4 to be pressed downward and plastically deform. Aluminum plate 5
The intermediate member 52 is formed by plastically deforming 0. The intermediate member 52 is cut into a predetermined size by the outer diameter processing means, and cut into individual molded products 60.

Next, the operation of the present embodiment will be described. The molded product 60 is produced by plastically deforming the aluminum plate 50 to be molded to obtain the intermediate member 52, and then cutting the aluminum plate 50 into predetermined dimensions.

FIG. 2 shows a molded article 60 desired to be produced. This molded product 60 is made of an aluminum plate 50 and has a longitudinal dimension L. In addition, molding 6
0 has a molded portion 54 continuously formed in an arc shape from one end to the other end on one end side in the width direction. The roller 14 provided on the mold 12 of the molding machine 10 is selected according to the shape of the molding section 54 of the molded product 60.

The aluminum plate 50 has a longitudinal dimension M (M ≧ M) which is equal to or greater than the dimension obtained by connecting three such molded products 60 in the longitudinal direction.
3L).

As shown in FIG. 1, this aluminum plate 50
Is loaded into the extruder 36 with the moving direction indicated by the arrow F as the longitudinal direction, the extruder 36 pushes out the aluminum plate 50 to the transfer section 26 in which the mold 12 is arranged. The extruded aluminum plate 50 moves in the direction of arrow F while suppressing the upward movement of the aluminum plate 50 on the endless belt 30 by the roller 32.

As shown in FIG. 3, when the aluminum plate 50 moves in the direction of arrow F and the leading end of the aluminum plate 50 is disposed below the roller 14 of the mold 12, the elevation control unit 2
The lifting unit 22 is operated by 4 (see FIG. 1), and the roller 14 is lowered. An endless belt 30 is provided below the roller 14.
Is not arranged, and the upward movement is prevented by the pressing roller 32. When the roller 14 descends and presses the surface of the aluminum plate 50, one end in the width direction of the aluminum plate 50 Plastically deforms downward in an arc shape according to the shape of the peripheral surface of the roller 14. At this time, the aluminum plate 5
The thickness of 0 is reduced by plastic deformation.

When one end of the aluminum plate 50 is plastically deformed,
The extruder 36 resumes the extrusion of the aluminum plate 50. Since the aluminum plate 50 is extruded by the extruder 36 (see FIG. 1) in the direction of arrow F with a predetermined pressure, the movement of the aluminum plate 50 is not hindered by the contact with the roller 14. For this reason, the roller 14 rotates and sequentially contacts the surface of the aluminum plate 50 to feed the aluminum plate 50 in the direction of arrow F. As a result, as the aluminum plate 50 moves relatively to the roller 14, the aluminum plate 50 is continuously plastically deformed along the arrow F direction. The continuous forming part 54 corresponding to is formed. This allows
Intermediate member 5 having molded portion 54 continuous from one end to the other end
2 are formed. The longitudinal dimension N of the intermediate member 52 is substantially equal to the longitudinal dimension M of the aluminum plate 50 (N = M ≧ 3L).

The obtained intermediate member 52 is cut to the longitudinal dimension L of the molded product 60 by, for example, laser processing. As a result, three molded articles 60 can be obtained by cutting the intermediate member 52, whose accuracy in the cross-sectional shape is ensured by the rollers 14 of the mold 12, at predetermined dimensions.

As described above, by using the mold 12 having the roller 14 without separately providing a step for ensuring the accuracy of the shape, the accuracy of the cross-sectional shape can be ensured, and the predetermined shape after molding can be obtained. Since the cutting is performed so as to be separated for each of the dimensions, the precision of the dimensions of the molded product 60 can be easily secured.

The molded article 60 can be obtained by processing the intermediate member 52 made of the aluminum plate 50 into a required shape by performing an outer diameter process, so that the molded member 60 can be formed from the intermediate member 52 without going through a complicated process. Article 60 can be made.

Therefore, a large number of molded products 60 having high accuracy in cross-sectional shape and dimensions can be efficiently produced in a short period of time. The molded article 60 is suitable, for example, as a sipe blade for a tire.

Further, since the aluminum plate 50 is plastically deformed while being moved by using the roller 14, the aluminum plate 50 having a different length can be similarly formed using the roller 14. Even if the shape or size of the molded product 60 is changed, it can be easily handled by changing the shape or position of the roller 14.

In the present embodiment, the aluminum plate 50 is
Although extrusion was performed toward No. 2, molding was not limited to this. For example, the same effect as described above can be obtained by a molding method in which the aluminum plate 50 is pulled out from the mold 12 or a molding method in which the position of the aluminum plate 50 is fixed and the mold 12 is rolled on the aluminum plate 50. Obtainable.

In this embodiment, the object to be formed is an aluminum plate 5
Although 0 was set, the object to be molded is not limited to these. The member is not limited to the aluminum plate 50 as long as it can be plastically deformed by pressing, and may be a sheet metal made of another material, and may be a resin as long as it can be plastically deformed.

Further, in the present embodiment, three molded articles 60 are produced from the intermediate member 52, but the number of molded articles 60 which can be produced from the intermediate member 52 is not limited to three. An aluminum plate 50 having a longitudinal dimension such that three or more molded products 60 can be obtained can be used in the same manner as described above. When the aluminum plate 50 has the same size as a plurality of molded products 60, the molded product 60 can be obtained by dividing the aluminum plate 50 equally. Alternatively, the molding may be performed using an aluminum plate 50 having a longitudinal dimension larger than the longitudinal dimension of one molded article 60, and thereafter, one molded article 60 may be cut out with accurate dimensions.

In the present embodiment, if the molded product 60 is disposed on the intermediate member 52 so that one end of one molded product coincides with the other end of the other molded product, the longitudinal direction of the molded portion 54 It is not necessary to match only at the ends that are both ends. In addition, although the number of the formed portions 54 provided on the intermediate member 52 is one, the invention is not limited to this. For example, the molded portions 54 may be provided at both ends in the longitudinal direction, and cut at a portion that becomes the center line of the two molded portions 54, and two molded products 60 may be obtained from the width direction of the intermediate member 52. In this case, the molded product 60 is in contact with the other molded products 60 at the other end between the molded portions 54 in addition to the ends at both ends in the longitudinal direction of the molded portion 54.

In the present embodiment, the moving direction of the aluminum plate 50 and the relative moving direction of the roller 14 match, but the present invention is not limited to this. For example, the rollers 14 may be relatively moved in a direction perpendicular to the moving direction of the aluminum plate 50. With this, the same effect as described above can be obtained.

[0044]

As described above, according to the present invention, the sectional shape of the plastically deformed portion of the plastic member can be ensured based on the outer shape of the rotating body. Since the manufacturing cost can be kept lower than in the case of manufacturing a mold, it is possible to obtain a molded product with high molding accuracy with high production efficiency, thereby producing a highly accurate molded product in a short time. Can be.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a molding machine according to an embodiment of the present invention.

FIG. 2 is a perspective view of a molded product according to the embodiment of the present invention.

FIG. 3 is a conceptual diagram illustrating an outline of a molded article manufacturing method according to an embodiment of the present invention.

FIG. 4 is a conceptual diagram illustrating a conventional press working.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Molding machine 12 Die 14 Roller (rotating body, roller) 22 Elevating part 26 Conveying part 36 Extruder 50 Aluminum plate (plastic member, metal plate) 52 Intermediate member 54 Molding part (plastic deformation part, processed part, concave part) ) 60 Molded product

Claims (3)

[Claims] 1. A molded article manufacturing method for manufacturing a molded article having a plastically deformed portion from one end to another end, comprising: positioning a rotating body at one end of a plastic member; While rotating the rotating body in a state where a predetermined pressing force is applied to the rotating body, the rotating body and the plastic member are relatively moved with each other, and the rotating body is moved to the other end of the plastic member, A method for manufacturing a molded product, comprising forming a plastically deformed portion depressed according to the outer shape of the rotating body. 2. When a plurality of molded products are obtained from the plastic member, an area of each molded product is set so that one end of one molded product coincides with the other end of another molded product. The method for producing a molded article according to claim 1, wherein 3. A processing section is set in a strip shape along one side of a thin-walled flat metal plate, and is rolled or rotated while pressing a roller from one end to the other end of the processing section. A method for producing a molded product, characterized in that the processed portion is a continuous concave portion corresponding to the outer shape of the roller, and cut so as to be divided into predetermined lengths in the longitudinal direction of the band-shaped concave portion.