JP2811868B2 - Width reduction press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a width reduction press.

[Prior Art] Conventionally, width reduction presses include, for example, JP-A-63-2530, JP-A-62-127340, JP-A-63-212001, and JP-A-63-242402. There is one shown in Japanese Patent Publication No.

As shown in FIG. 7, the width reduction press includes a tapered portion 2 on the opposing surface, the interval between which decreases as going downstream in the line direction 1; A pair of dies 4, 4 having a parallel portion 3 extending in parallel with the direction 1 are provided so as to be able to approach and separate from each other on both sides of the press material 5 extending in the line direction 1, and press between the dies 4, 4 The buckling prevention rolls 6, 6 are provided above and below the material 5, and the pair of dies 4, 4 are moved toward and away from each other, so that
Press material 5 is reduced in width between 4 and 4 and buckling prevention rolls 6 and 6
This prevents the buckling of the press material 5 which has been pressed down by pressing the press material 5 vertically.

[Problems to be Solved by the Invention] However, the above conventional width reduction press has a low probability but has the following problems.

That is, when the press material 5 is reduced in width, the press has mechanical play, the press material 5 has an uneven temperature distribution or an imbalance in component distribution, or the press material 5 being conveyed.
If there is a run-out, there is a probability of about 1 in 10,000, but as shown by the imaginary line in FIG. 7, the press material 5 after the width reduction may be twisted.

As described above, when the press material 5 is twisted, the eighth
As shown in the figure, since the cross-sectional shape in the width direction of the press material 5 is deformed, there is a problem that the product becomes defective or does not bite into the next rolling mill.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a width reduction press capable of preventing twisting of a width-reduced press material.

Means for Solving the Problems According to the present invention, a pair of dies provided on both sides of a press material extending in a line direction so as to be able to approach and separate from each other, and a small number of dies between the dies and above or below the press material. A buckling prevention roll provided on one side, and a torsion prevention member extending in the width direction of the press material provided in contact with or slightly away from the press material at least upstream of the buckling prevention roll in the line direction. The present invention relates to a width reduction press characterized by comprising:

[Operation] A torsion preventing member provided on the upstream side in the line direction of the buckling prevention roll restrains the press material on the mold entry side from twisting, and presses the portion where the width is reduced between the dies. Reduce the occurrence of twisting in the material.

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

FIGS. 1 and 2 show a first embodiment of the present invention. In FIG. 1 and FIG. 2, portions denoted by the same reference numerals as those in FIG. 7 represent the same components.

The buckling prevention rolls 6 and 6 are disposed at the center of gravity 7 of the press load applied to the press material 5 by the mold 4.

A plate-shaped torsion prevention member 8 extending in the width direction of the press material 5 is provided slightly near the upstream side of the buckling prevention roll 6 in the line direction 1 and above the press material 5 and slightly away from the press material 5.

Reference numeral 9 denotes a pinch roll provided on the upstream side in the line direction 1 between the dies 4,4.

While the press material 5 is intermittently sent in the line direction 1, the pair of dies 4, 4 are moved close to and away from each other, so that the press material 5 sent between the dies 4, 4 is reduced in width by the dies 4, 4. And the width dimension is equal to the interval between the parallel portions 3, 3.

At this time, the buckling prevention roll 6 presses the center of gravity 7 of the press load of the press material 5 so that the press 5
Prevent buckling.

When there is mechanical play in the press, when the press material 5 has uneven temperature distribution or unbalanced component distribution,
When the press material 5 being conveyed is skewed to the left or right or due to other disturbances, the press material 5 whose width has been reduced may be twisted. In the present invention, if the press material 5 is likely to be twisted, The press material 5 is first provided with a twist preventing member 8 provided near the upstream side of the buckling preventing roll 6 in the line direction 1.
, The torsion of the portion is restrained, and the pressing material 5 is a continuous body. Therefore, the restraining force on the portion of the pressing material 5 which hits the torsion preventing member 8 is entirely applied, and the pressing material 5 is
Twist is prevented from occurring in the portion where the width is reduced between the portions.

FIG. 3 shows a second embodiment of the present invention, in which the torsion preventing member 8 is held in contact with the press material 5, so that the same operation and effect as in the above embodiment can be obtained. it can.

FIG. 4 shows a third embodiment of the present invention, in which a roll extending in the width direction of the press material 5 is provided slightly apart from the press material 5 as the torsion preventing member 8. The same operation and effect as the embodiment can be obtained.

FIG. 5 shows a fourth embodiment of the present invention, in which a roll extending in the width direction of the press material 5 is held in contact with the press material 5 as the torsion preventing member 8, and even in this case, each of the aforementioned The same operation and effect as the embodiment can be obtained.

FIG. 6 shows a fifth embodiment of the present invention. In addition to the torsion preventing member 8, another torsion preventing member 10 is provided at the upper and lower portions of the buckling prevention rolls 6, 6 upstream and downstream of the press material 5 as appropriate. In this case, the same operation and effect as those of the above embodiments can be obtained.

It should be noted that the width reduction press of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the width reduction press of the present invention, since the twist prevention member is provided at least on the upstream side in the line direction of the buckling prevention roll, it is possible to prevent the press material from being twisted. An excellent effect that it can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment of the present invention, and FIG.
FIG. 3 is a side view of a second embodiment of the present invention,
FIG. 4 is a side view of a third embodiment of the present invention, FIG. 5 is a side view of a fourth embodiment of the present invention, FIG. 6 is a side view of a fifth embodiment of the present invention, FIG. The figure is a perspective view of a conventional example, and FIG.
FIG. 3 is a cross-sectional view of a press material in which a twist has been generated by the apparatus shown in the figure. In the drawing, 1 is a line direction, 4 is a mold, 5 is a press material, 6 is a buckling prevention roll, and 8 and 10 are twist prevention members.

────────────────────────────────────────────────── ─── of the front page continued (72) inventor Hiroshi Kobayashi, Yokohama, Kanagawa Prefecture Isogo-ku, Shin'nakahara-cho, address Ishikawajima-Harima Heavy Industries Co., Ltd. Yokohama in the second plant (58) investigated the field (Int.Cl. ^6, DB name ) B21B 1 / 00,15 / 00 B21J 1/04

Claims (1)

(57) [Claims] 1. A pair of dies provided on both sides of a press material extending in a line direction so as to be able to approach and separate from each other, and a seat provided between the dies and at least one of above and below the press material. A buckling prevention roll, and a twist prevention member extending in the width direction of the press material provided in contact with or slightly away from the press material at least upstream of the buckling prevention roll in the line direction. Width reduction press.