JPH0234689B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll forming apparatus for forming a tapered plate material with a flange portion having an irregular cross section whose cross-sectional shape changes in the longitudinal direction.

In the automobile industry, tapered plate materials whose cross-sectional shape changes in the longitudinal direction are used, such as belt moldings with irregular cross-sections for wide door frames. When forming a tapered plate material b having a portion a, conventionally, a hydraulic press device was mainly used to process the flange portion a one side at a time. Therefore, in such a conventional method,
There was a problem with poor processing efficiency.

The present invention was made in view of such circumstances,
The purpose is to provide a roll forming apparatus that can efficiently and accurately form a tapered plate material having flanges on both sides.

The present invention to achieve the above-mentioned object is a roll forming device for forming a tapered member having an irregular cross section whose cross-sectional shape changes in the longitudinal direction, wherein the end face of the tapered member has a cross-sectional shape in the longitudinal direction with respect to the rotation axis. A cylindrical male roll piece having an inclination angle that corresponds to the change in , and a cylindrical female roll piece having a groove on its outer periphery that meshes with the male roll piece. It is.

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

As shown in FIG. 2, a cylindrical male roll piece 1 whose one end face has a required inclination angle with respect to the rotation axis;
A cylindrical female roll piece 2 having a groove 2a on its outer periphery that engages with the male roll piece 1 is supported on a stand (not shown) so that it can be rotated and moved up and down so as to sandwich the forming line from above and below. urge

These male type roll piece 1 and female type roll piece 2
is the surface length in the axial direction of the male roll piece 1 in advance,
It is set at a position corresponding to the surface length of the axial groove 2a of the female roll piece 2.

When forming the plate material 3 using the roll forming apparatus having such a configuration, the male roll piece 1 and the female roll piece 2 are held at a required gap corresponding to the plate material 3, and the male roll piece 1 and the female roll piece 2 are held in the opposite directions. It rotates at a constant speed. The plate material 3 thus formed has flanges 3a on both sides, as shown in FIG. 3, and is a product whose cross section changes in the longitudinal direction. Third
In the figure, the dimension L is the circumferential length of the male roll piece 1 and the female roll piece 2, and after continuously forming a long plate material 3, it is cut at length L or L/2. This allows you to obtain a large number of tapered sashes of the same length.

As described above, when the plate material 3 is formed using the male roll piece 1 and the female roll piece 2, a tapered plate product with a flange portion 3a having an irregular cross section in the longitudinal direction can be obtained. edge,
The change in the cross section of the product is determined by the inclination angle of both roll pieces 1 and 2, the rising height of the flange portion 3a is determined by the engagement depth of both roll pieces 1 and 2, and the length of the product is determined by the inclination angle of both roll pieces 1 and 2. It can be easily changed by selecting the diameters of the two.

In the embodiment described above, one end face of the male roll piece 1 and one end face of the groove 2a of the female roll piece 2 are perpendicular to the axis, but depending on the shape of the product to be obtained, both ends may be The surface may have an inclination angle.

As explained above, according to the roll forming apparatus of the present invention, the male roll pieces each having an inclination angle with respect to the axis and the female roll pieces having grooves corresponding to the male roll pieces are used to form a sheet material. Since it can be continuously roll-formed, tapered plate products with irregular cross sections can be manufactured simply and efficiently with high precision, and mass production is also possible.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a tapered plate material, FIG. 2 is an explanatory diagram of a roll forming apparatus of the present invention, and FIG. 3 is an explanatory diagram showing the shape of a molded plate material. 1...Male roll piece, 2...Female roll piece, 2
a... Groove.

Claims (1)

[Claims] 1. A roll forming device for forming a tapered member having an irregular cross-section whose cross-sectional shape changes in the longitudinal direction, wherein the end face has an inclination angle relative to the rotational axis corresponding to the change in the cross-sectional shape of the tapered member in the longitudinal direction. 1. A roll forming device comprising: a cylindrical male roll piece; and a cylindrical female roll piece, the outer periphery of which has a groove that meshes with the male roll piece.