JP4322033B2 - Sequential forming method and apparatus - Google Patents

Abstract

In forming a secondary form portion having a three-dimensional shape to apart of a primary form portion having a two-dimensional curved plane, a work 240 having a curved plane corresponding to the shape of the primary formportion is prepared, and only the secondary form portion is created by incremental forming.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sequential molding method and apparatus.
[0002]
[Prior art]
Japanese Patent Application Laid-Open Publication No. 2004-228688 discloses a sequential forming means for sequentially forming along a contour line corresponding to the shape of a product to be molded while a rod-shaped tool is in contact with the surface of a metal plate material.
[0003]
[Patent Document 1]
JP 2002-1444 (European Patent Application Publication No. 1147832A2)
[0004]
[Problems to be solved by the invention]
FIG. 1 is a perspective view of a product manufactured by sequential molding by applying the present invention.
The product denoted by reference numeral 1 as a whole is provided with a structure in which a second molded portion 20 having a three-dimensional shape protrudes from a central portion of the first molded portion 10 having a two-dimensionally curved cross-sectional shape.
5 to 9 show a process of manufacturing the product 1 by a normal sequential molding process.
The forming jig 100 disposed on the table 50 includes a first mold member 110 corresponding to the first molded portion 10 of the product and a second mold member 120 corresponding to the second molded portion 20 of the product. Have.
Metal plate 140 as the workpiece (material) is a flat material, is gripped around the by workpiece holder 130 and the workpiece clamp 150. The work holder 130 can be lowered from the top of the second mold member. Sequential molding tool 160 is Yes so along the axis in the vertical direction, can be moved horizontally and vertically.
[0005]
FIG. 6 shows an outline of sequential molding processing, and FIG. 7 shows a molding pass.
6, as shown in FIG. 7, the path P ₁ of molding a first mold part sequentially molded by path P ₂ for molding the second molding part is subjected to the entire workpiece is processed into a shape of the product .
As shown in FIG. 8, the sequential forming tool 160 performs forming by being fed by a pitch P in the Z-axis direction while moving on the XY axis parallel to the upper surface of the planar workpiece 140. In each drawing of FIG. 8, the sequential forming tool 160 is shown, but in reality there is only one. The movement along the contour line is indicated by three tools 160.
[0006]
That is, if the feed pitch P is constant, the molding proceeds along the contour line. When the curvature radius of the curved surface of the first molding part is large, there is a problem that the interval between adjacent passes becomes wide and the moldability is deteriorated.
Therefore, if the feed pitch is reduced to improve the moldability, the total length of the molding pass is increased and the processing time is increased.
[0007]
FIG. 9A shows a state in which the first forming unit 10 and the second forming unit 20 are processed on the workpiece 140 after the sequential forming process is completed.
Next, corresponding to the outer peripheral shape of the product, subjected to appropriate trimming C ₁ to the work 140, obtain the product 1.
An end material having a space 142 obtained by trimming a product by trimming processing remains on the work 140, which causes the yield of the material to deteriorate.
The present invention provides a sequential molding method and apparatus that solves the above-described problems.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the three-dimensional shape sequential molding method of the present invention prepares a workpiece having a curved surface corresponding to the first molding portion, and a part of the workpiece is subjected to a sequential molding process to form a third three-dimensional shape. The second molded part is processed.
The sequential forming apparatus includes a work holder that grips the periphery of the work, a table on which the work clamp is placed, and a sequential forming tool that is installed in an axial direction perpendicular to the table, and corresponds to the curved surface of the work. A work holder and work lamp are provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
2 to 4 are explanatory views showing a method for producing a product by sequential molding according to the present invention.
In the present invention, the forming jig 200 disposed on the table 50 includes only the mold member 220 corresponding to the second forming portion of the product.
The metal plate 240 serving as a workpiece (material) is processed in advance into a curved surface having the same two-dimensional curved surface as the first molded portion of the product.
The work holder 230 has a holder surface 232 that matches the curved surface of the work 240. Similarly workpiece clamp 250 has a clamp surface 252 that matches the curved surface of the workpiece 240.
[0010]
During machining, the sequential forming tool 260 and the table are relatively moved along the plane shape of the second forming portion on the XY plane, and the sequential forming tool 260 is relatively moved in the Y-axis direction. Controls the sequential forming tool 260 so as to move along the first forming portion, that is, the curved surface of the workpiece 240 .
Further, with the progress of processing, send sequential molding tool 260 by a predetermined pitch P _2, processing the second mold portion is the same as the normal sequential molding.
[0011]
As shown in FIG. 4 , since a two-dimensional curved surface is preliminarily applied to the workpiece 240 and only the three-dimensional second forming part is sequentially formed, the forming pass is short and the processing time is shortened. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a product molded by applying the present invention.
FIG. 2 is a perspective view of a device used in the present invention.
FIG. 3 is an explanatory diagram showing an embodiment of the present invention.
FIG. 4 is an explanatory diagram showing an embodiment of the present invention.
FIG. 5 is a perspective view of a device used in the prior art.
FIG. 6 is an explanatory diagram of a conventional technique.
FIG. 7 is an explanatory diagram of a conventional technique.
FIG. 8 is an explanatory diagram of a conventional technique.
FIG. 9 is an explanatory diagram of a conventional technique.
[Explanation of symbols]
1 Product 10 first mold part 20 and the second mold part 200 forming jig 230 of the workpiece holder 240 workpiece 250 workpiece clamp 260 sequential molding tool

Claims (2)

A first molded part whose cross-sectional shape forms a two-dimensional curved surface;
A sequential forming method of forming a metal plate that is a part of the first forming part and includes a second forming part having a three-dimensional shape,
Prepare the metal plate having a curved surface formed in advance in the outer peripheral shape of the product, and the entire product formed in the first molded portion,
Holding the metal plate with a work holder having a holder surface that matches the curved surface of the metal plate and a work clamp having a clamp surface that matches the curved surface of the workpiece,
With the forming jig corresponding to only the second forming portion and the sequential forming processing tool, the shape corresponding to the second forming portion is formed on the metal plate,
In processing the second forming portion, the sequential forming processing tool is moved relative to the two-dimensional curved surface of the first forming portion and sent at a predetermined pitch in the vertical direction. thing,
A sequential processing molding method characterized by the above. A table on which a work holder and a work clamp for holding a metal plate, which is a first forming part formed in the outer peripheral shape of the product in advance and the whole product is formed in a two-dimensional curved surface,
A sequential forming tool installed in an axial direction perpendicular to the table;
A sequential molding apparatus comprising:
The work holder includes a holder surface corresponding to the first molding part;
The work clamp includes a clamp surface corresponding to the first molding part,
A table having a work jig and a work clamp, which is provided only with a second forming part having a three-dimensional shape formed on the first forming part, is mounted on the fixed forming jig. Provided with means to move vertically ,
A sequential molding apparatus characterized by

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