JPH0270308A - Method and device for edging - Google Patents

Abstract

PURPOSE:To keep a stock good condition and to obtain a large drafting amount by edging the sheet stock by use of edging dies and restricting spread of the stock in upper and lower directions by press dies. CONSTITUTION:A sheet stock 16 is passed between upper and lower press dies 6, 8 and edging is prefomed so that the stock 16 is made to have a prescribed width dimension by edging dies 3 in one edging operation. The stock 16 freely expand in upper and lower directions by drafting from both sides and is brought to be a sheet stock having a thickness equal to a space between upper and lower press dies 6, 8 by restriction by the dies 6, 8 from part of way. Hence, a large edging amount is obtained without shape defects.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for width reduction in a rolling line that allows a large width reduction amount to be obtained.

[Prior Art] Conventional width reduction methods and devices use width reduction dies that are installed on both sides of a plate in the width direction so that they can approach and separate from each other, and reduce the width of the plate in small amounts in multiple steps. , so as to obtain a desired width dimension.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional width reduction method and apparatus, if a large width reduction amount is applied to the plate material so that the plate material has the desired width dimension in - times of pressing, when the plate material is wide, If the plate material is narrow, a bulge will occur in the center of the plate material (a so-called drum shape) as shown in Figure 4, and the thickness dimension will become uneven in the width direction. Since the plate material becomes defective, it is necessary to carry out the width reduction in small portions in multiple steps as described above.

However, performing the width reduction in small quantities in multiple steps in this way increases the product cost because the width reduction process takes a long time and requires the installation of a large number of width reduction equipment. Since this is undesirable, it has been desired to be able to roll down the width in one step without making the plate defective.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a width reduction method and apparatus that can obtain a large reduction amount without making the plate material defective.

[Means for Solving the Problems] The present invention provides a method in which, after arranging presser dies above and below a plate material apart from the surface of the plate material, the width reduction die is used to reduce the width of the plate material, and the presser die is used to reduce the width of the plate material. A width reduction method characterized by restraining the spread in the vertical direction, a presser die is arranged above and below the plate material apart from the surface of the plate material, and width reduction dies that can be moved close to and separated from each other are arranged on both sides of the plate material in the width direction. This invention relates to a width reduction device characterized by the following.

[Function] When the width of the plate material is greatly reduced by the width reduction die, the plate material expands freely in the vertical direction and is restrained by the upper and lower presser dies from the middle, so as a result, the plate material fills the space between the upper and lower presser dies. The thickness distribution is equal to that of the plate material, and the plate material does not become defective.
A large amount of width reduction can be obtained.

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

Figures 1 and 2 show an embodiment of the present invention, in which a pair of width reduction molds 3 are provided on both sides in the width direction of the core inside the housing 1 and are moved toward and away from each other in the width direction by width reduction cylinders 2. ,housing! Guides 4 and 5 are provided at positions above and below the width reduction mold 3 on both sides of the interior, and between the upper guides 4, an upper frame 7 that holds the upper presser mold 6 in an exchangeable manner is supported so as to be movable up and down. A lower frame 9 that exchangeably holds an upper presser mold 8 is supported between the lower guides 5 so as to be movable up and down,
A worm jack 13 for height adjustment and a cylinder 14 for setting are arranged between the upper and lower frames 7.9 and the housing 1, and are composed of a worm gear IO, a worm wheel 11, and a screw shaft 12, and a cylinder 14 for setting. 7
Counter balance cylinder 15 between °9 and housing 1
and connect.

Note that 16 is a plate material before width reduction, and 17 is a plate material after width reduction.

To reduce the width of the plate material 1B, first extend the cylinder 14, operate the worm jack I3, raise and lower the upper and lower frames 7.9, and lower the upper and lower presser molds 6.8 to the thickness dimension of the plate material 1B. It is made to stand by so that a wider interval (thickness dimension of the plate material 17 after width reduction) is achieved.

Next, the plate material 1B is passed between the upper and lower holding molds 6.8, and the width reduction cylinder 2 is operated to perform width reduction using the width reduction mold 3 so that the plate material 18 has a desired width dimension at one time. Then, the plate material 1B is rolled down from both sides and freely expands in the vertical direction, but is restrained by the upper and lower presser dies 6 and 8 from the middle, so that the space between the upper and lower presser dies 0.8 The plate materials 17 have the same thickness dimension, and a large width reduction can be obtained without causing shape defects.

After that, the cylinder 14 is contracted and the upper and lower frames 7.9
By raising and lowering the upper and lower presser molds 6°8, the width-reduced plate material 17 is taken out or sent, and the next width reduction is performed in the same way. In this case, the upper and lower presser molds By arbitrarily changing the shape of the presser surface of the presser die 6.8, it is possible to freely form the plate material 17 having a thickness distribution equal to the shape of the presser surface of the presser die 6.8.

FIG. 3 is an explanatory view of another embodiment of the present invention, in which a cylinder 14° with the top and bottom of the cylinder 14 in FIG. This is aimed at stabilizing the operation, and the first
As shown in the figure, it is possible to obtain a large width reduction amount.

It should be noted that the width reduction method and apparatus of the present invention are not limited to the above-described embodiments, and it goes without saying that various changes may be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the width reduction method and apparatus of the present invention, after arranging presser dies above and below the plate material apart from the plate surface, the width reduction die is used to reduce the width of the plate material. Since the plate is rolled down, an excellent effect can be achieved in that a large width reduction amount can be obtained without causing shape defects in the plate material.

[Brief explanation of the drawing]

Fig. 1 is an overall view of one embodiment of the present invention, Fig. 2 is a sectional view of a plate material after width reduction is performed by the apparatus shown in Fig. 1, and Fig. 3 is a partially enlarged view of another embodiment of the present invention. 4 are cross-sectional views of a plate material when a large width reduction is performed using a conventional device. In the figure, 1 is a housing, 3 is a width reduction die, 6 is an upper presser die, and 8 is an upper presser die.

Claims (1)

[Claims] 1) After arranging presser dies above and below the plate material apart from the surface of the plate material, the width of the plate material is reduced using a width reduction die, and the spread of the plate material in the vertical direction is controlled by the presser die. A width reduction method characterized by restraint. 2) A width reduction device characterized in that presser dies are disposed above and below the plate material apart from the surface of the plate material, and width reduction dies that can be moved closer to and separated from each other are arranged on both sides of the plate material in the width direction.