JP2600838B2 - Width reduction method and apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for width reduction in a rolling line capable of obtaining a large width reduction.

[Prior Art] A conventional width reduction method and apparatus uses a width reduction mold provided so as to be able to approach and separate from each other on both sides in the width direction of the plate material, and the width of the plate material is reduced a plurality of times in small increments. , A desired width dimension.

[Problems to be Solved by the Invention] However, in the above-described conventional width reduction method and apparatus, when a large width reduction amount is given to the plate material so that the plate material has a desired width dimension by one press, when the plate material is wide, Buckles, or when the plate is narrow, a bulge occurs at the center of the plate a as shown in FIG. 4 (a so-called drum shape).
Since the plate material becomes inferior, for example, the thickness dimension becomes non-uniform in the width direction, the width reduction has to be performed in a small number of times in a plurality of times as described above.

However, performing the width reduction in a small number of times by dividing the plate material into a plurality of times in this manner increases the width reduction step, and requires installation of a large number of width reduction equipment, thereby increasing the product cost. Since this is not preferable, it has been desired to be able to reduce the width in a single operation without making the sheet material defective.

The present invention has been made in view of the above circumstances, and has as its object to provide a width reduction method and apparatus capable of obtaining a large reduction amount without deteriorating a plate material.

Means for Solving the Problems According to the present invention, after the presser dies are arranged above and below the plate material apart from the surface of the plate material, the left and right width reduction dies are placed in the width direction of the position where the presser dies are arranged in the plate material. A width reduction method characterized by performing width reduction while constraining the spread of the plate material in the vertical direction by the presser die by moving the presser die close to both sides, and a presser die separated from the surface of the plate material vertically above and below the plate material. And a width reduction die capable of approaching and separating from each other at both sides in the width direction of the plate material at the position where the presser die is disposed.

[Operation] When the width of the plate material is greatly reduced by the width reduction die, the plate material freely expands in the vertical direction, and is constrained from the middle by the upper and lower presser dies. As a result, the plate material becomes a space between the upper and lower presser dies. The thickness distribution is equal, and a large width reduction can be obtained without the sheet material becoming defective.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which a pair of width reduction dies 3 are provided on both sides in the width direction substantially at the center of the inside of a housing 1 by a width reduction cylinder 2 to approach and separate from each other in the width direction. Guides 4 and 5 are provided at positions above and below the width reduction mold 3 on both sides inside the housing 1, and an upper frame 7 that holds the upper presser mold 6 exchangeably between the upper guides 4 is supported so as to be able to move up and down. Similarly, a lower frame 9 for exchangeably holding the lower presser die 8 between the lower guides 5 is supported so as to be vertically movable,
Worm gear 10 between upper and lower frames 7, 9 and housing 1
A worm jack 13 for height adjustment and a cylinder 14 for setting composed of a worm wheel 11 and a screw shaft 12 are arranged, and a counter balance cylinder 15 is provided between the upper and lower frames 7, 9 and the housing 1. connect.

In addition, 16 is a plate material before width reduction, and 17 is a plate material after width reduction.

When the width of the plate 16 is reduced, the worm jack 13 is first operated with the cylinder 14 extended, and the upper and lower frames 7, 9 are raised and lowered, and the thickness of the plate 16 of the upper and lower holding molds 6, 8 is reduced. It is made to stand by so as to have an interval wider than the dimension (the thickness dimension of the plate 17 after the width reduction).

Next, the plate material 16 is passed between the upper and lower pressing dies 6 and 8, the width reduction cylinder 2 is operated, and the width reduction is performed by the width reduction die 3 so that the plate material 16 has a desired width dimension at one time. Then, the plate member 16 is pressed down from both sides and freely expands in the vertical direction, but is restrained from the middle by the upper and lower presser dies 6 and 8, so that the space between the upper and lower presser dies 6 and 8 as shown in FIG. Plates 17 of equal thickness
Thus, a large width reduction can be obtained without causing a shape defect.

Thereafter, the cylinder 14 is contracted to move the upper and lower frames 7, 9 up and down, so that the interval between the upper and lower presser dies 6, 8 is widened to take out the plate material 17 whose width has been reduced, or to feed the same, and in the same manner, Width reduction.

In this case, by arbitrarily changing the shape of the holding surfaces of the upper and lower holding dies 6, 8, it is possible to freely form the plate 17 having a thickness distribution equal to the shape of the holding surface of the holding dies 6, 8. it can.

FIG. 3 is an explanatory view of another embodiment of the present invention. A cylinder 14 'in which the cylinder 14 of FIG. 1 is turned upside down is arranged so that its rod contacts the screw shaft 12 of the worm jack 13. Thus, the operation can be stabilized, and a large width reduction can be obtained as in FIG.

It should be noted that the width reduction method and apparatus of the present invention are not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, according to the width reduction method and apparatus of the present invention, after arranging the pressing dies on the upper and lower sides of the plate away from the surface of the plate, the left and right width reduction dies are placed on the plate. By moving the presser die closer to both sides in the width direction at the position where the presser die is arranged, the presser die is used to perform the width reduction while restraining the spread of the plate material in the vertical direction. Large width reduction can be obtained, and
Since the upper and lower holding dies are not reduced, excellent effects such as the necessity of applying a rolling force positively in the thickness direction can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall view of one embodiment of the present invention, FIG. 2 is a cross-sectional view of a plate after width reduction by the apparatus of FIG. 1, and FIG. 3 is a partially enlarged view of another embodiment of the present invention. FIG. 4 is a cross-sectional view of the plate material when the width is largely reduced by the conventional apparatus. In the drawing, reference numeral 1 denotes a housing, 3 denotes a width lowering die, 6 denotes an upper holding die, and 8 denotes a lower holding die.

Claims (2)

(57) [Claims] After arranging presser dies above and below the plate material apart from the surface of the plate material, moving the left and right width reduction dies closer to both sides in the width direction of the position where the presser dies are arranged on the plate material. A width reduction while restraining the spread of the plate material in the vertical direction with the presser die. 2. A pressing die is disposed above and below a plate material apart from the surface of the plate material, and width-reducing dies which can be moved toward and away from each other are disposed on both sides in the width direction of the position of the pressing die on the plate material. A width reduction device.