JPH0216811Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a bending die for moldings for vehicles, and particularly to a bending die for three-dimensionally bending a long material.

[Conventional technology]

FIG. 6 is a perspective view showing an example of a molding for a vehicle. In the figure, reference numeral 1 indicates molding, in which a metal profile 2 made by bending a metal strip material to have a predetermined cross-sectional shape by cold roll forming or the like is fed into an extrusion mold, and the resin is extruded by extrusion molding of a synthetic resin. Long material 4 forming part 3
is cut into a predetermined size, and then the whole or a part thereof is three-dimensionally bent in the X and Y directions with respect to the axis Z direction.

Conventionally, in order to perform such a bending process, the bending process is performed in the X or Y direction using a normal press bending die, and then the bending process is performed in the Y or X direction using a similar method to form molding 1. is manufactured.

[Problem that the invention attempts to solve]

However, such conventional bending methods require two steps, which increases the cost. There were problems in that the bending curvature in the X or Y direction of bending changed slightly, requiring correction again.

This idea was created by focusing on these conventional problems, and by performing bending in one direction and then bending in the other direction, it is possible to bend in three-dimensional directions with a simple structure and operation. The purpose of this invention is to provide a bending die for moldings that can be bent and does not require modification.

[Means for solving problems]

This invention consists of a horizontal die and a lower die that have a shape corresponding to the shape in the direction in which moldings are bent and are provided adjacent to the lower mold, and a horizontal die that has a shape that corresponds to the horizontal die and a horizontal A cam punch provided so as to be movable forward and backward with respect to the die, a cam provided on the upper mold to move the cam punch forward and backward, and a cam having a shape corresponding to the lower die and lowered or lowered opposite to the lower die. A punch provided on the upper die so as to rise, and a highly flexible core material provided between the horizontal die and cam punch, and the lower die and punch for attaching and bending a long material. This is a bending die for moldings.

[Effect]

In the bending die for moldings of this invention, a long material is attached to the core material and placed between the horizontal die and cam punch, and the lower die and punch,
The upper mold is lowered and the cam advances the cam punch toward the horizontal die to bend the long material in one direction, and in this state, the upper die is further lowered to perform bending in the other direction. After that, the upper die is raised and the processed molding is removed from the core material.

〔Example〕

This invention will be explained below with reference to embodiments of the drawings. FIG. 1 is a cross-sectional view of FIG. 2 showing an embodiment of this invention; FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a plan view of the lower die, and FIGS. 4 and 5 are cross-sectional views showing the operating state.

The bending die of this embodiment consists of a fixed lower die 5 and a movable upper die 6 that moves up and down. Lower mold 5
A metal horizontal die 8 and a lower die 9 are provided adjacent to each other in the right angle direction on a rectangular lower plate 7. The horizontal die 8 has a shape corresponding to the shape of the molding 1 in the X direction, and is formed into a substantially arc shape in the embodiment. Lower die 9 is Y of molding 1
It has a shape corresponding to the shape of the direction, and in the embodiment, it has an upper surface bent in a dogleg shape so that the center portion is thinner.

A metal cam punch 10 formed into a shape corresponding to the horizontal die 8 is provided at a position facing the horizontal die 8, and is attached to the cam plate 11. The cam plate 11 has a cam surface 11a, and is urged toward the cam support 14 by a pin 12 and a spring 13 so that it can slide on the lower plate 7 and move forward or backward in the direction of the horizontal die 8. There is.

Between the horizontal die 8 and the cam punch 10 and above the lower die 9, a core material 15 formed into a plate shape from a material with high elasticity, flexibility, and restorability, such as polyurethane resin or polyacetal resin, is provided.
A long hole 15 is formed in the support bar 16 fixed to the horizontal die 8.
It is attached with a loose fit by a. Core material 15
A mounting portion 15b having a shape corresponding to the inside of the elongated material 4 is formed at the upper part of the elongated material 4. Stoppers 17 and 18 are attached to the lower plate 7 on both sides of the horizontal die 8, lower die 9, cam punch 10, and core material 15, and at least one of them is removable.

The upper mold 6 is provided with a cam 20 and a punch 21 on an upper plate 19. The cam 20 has a cam surface 20a corresponding to the cam surface 11a so as to move the cam plate 11, and is inserted between the cam plate 11 and the cam support 14. Punch 21 includes horizontal die 8 and cam punch 1
The long material 4 is bent so that the long material 4 attached to the core material 15 sandwiched between
and has a shape corresponding to the lower die 9.

Next, the effect will be explained. Figures 1 and 2
As shown in the figure, a long material 4 in which a resin part 3 is formed by extrusion molding on a metal profile 2 is attached to the attachment part 15b of the core material 15, and is inserted between the horizontal die 8, the cam punch 10, the lower die 9, and the punch 21. and its both ends abut against the stoppers 17 and 18.

When the upper mold 6 is lowered in this state, the cam surface 20a of the cam 20 is moved to the cam surface 11a of the cam plate 11.
The cam plate 11 and the cam punch 10 are moved forward toward the horizontal die 8. As a result, the elongated material 4 and the core material 15 are sandwiched between the horizontal die 8 and the cam punch 10, and bent in the X direction. When the cam 20 reaches the bottom dead center, the elongated material 4 and the core material 15 are moved to the horizontal die 8 and the cam punch 1.
0 and is bent into an arc shape.

When the upper die 6 further descends, the elongated material 4 and the core material 15 are sandwiched between the horizontal die 8 and the cam punch 10, and then sandwiched between the lower die 9 and the punch 21 to be bent in the Y direction. . At this time, since the elongated material 4 is sandwiched between the horizontal die 8 and the cam punch 10, deformation in the X direction is restricted.

The strokes of the cam punch 10 and the punch 21 are set to take into account spring back. By the above operations, the elongated material 4 is bent in the X and Y directions, and a molding 1 having a predetermined shape is obtained. When the upper die 6 is raised, the cam plate 11 and the cam punch 10 are also moved backward, and when the molding 1 is removed from the core material 15, the core material 15 is restored to its original linear shape.

In the above embodiments, the core material 15 has a structure in which the elongated material 4 is attached to the outside, but it can be divided into two parts and covered from the inside and the outside. Further, in the above embodiment, processing in the Y direction is performed after processing in the X direction, but conversely, processing in the X direction may be performed after processing in the Y direction. Further, the shape and structure of the horizontal die 8, lower die 9, cam punch 10, core material 15, punch 21, etc. can be changed depending on the shape and structure of the molding 1 as a target.

The molding 1 targeted by the present invention is not limited to the one shown in the drawings, but includes all moldings for vehicles, and is not limited to the composite material of the metal profile 2 and the resin part 3. It may also consist of only

[Effect of idea]

According to this invention, it is possible to perform bending in one direction while bending in the other direction, making it possible to perform bending in three dimensions with a simple structure and operation, requiring no modification and reducing manufacturing costs. Effects such as lowering the

[Brief explanation of the drawing]

Fig. 1 is a sectional view of Fig. 2 showing an embodiment of this invention, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a plan view of the lower mold, and Figs. 4 and 5 are FIG. 6 is a cross-sectional view showing an operating state, and FIG. 6 is a perspective view showing an example of a molding for a vehicle. In each figure, the same reference numerals indicate the same parts, 1 is the molding, 4 is the long material, 5 is the lower mold, 6 is the upper mold,
7 is the lower plate, 8 is the horizontal die, 9 is the lower die, 10
is a cam punch, 11 is a cam plate, 14 is a cam support, 15 is a core material, 16 is a support bar, 17,
18 is a stopper, 19 is an upper plate, 20 is a cam, and 21 is a punch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A horizontal die and a lower die that have a shape corresponding to the shape in the direction in which moldings are bent and are provided adjacent to the lower mold, and correspond to the horizontal die. a cam punch having a shape corresponding to the lower die and provided so as to be able to move forward and backward with respect to the horizontal die; a cam provided on the upper mold to move the cam punch forward and backward; A punch provided on the upper die so as to descend or rise in opposition to the die, and a flexible member provided between the horizontal die and cam punch and the lower die and punch for attaching and bending a long material. A bending mold for moldings with a core material rich in (2) The bending die according to claim 1, wherein the cam punch and the cam have a cam surface consisting of an inclined surface that abuts each other. (3) The bending mold according to claim 1 or 2, wherein the punch is moved downward by a cam and a horizontal die, sandwiching the elongated material and the core material.