JPS62101336A - Method and device for preventing buckling of width press - Google Patents

Abstract

PURPOSE:To prevent the generation of the flaw on the surface of the material and buckling, etc., by holding the pressing force of a pressing roll constantly all the time by adjusting with changing the pressing force of the pressing roll according to the width rolling reduction quantity by the width press metal die at the width rolling reduction time by the width press metal die. CONSTITUTION:The pressing force of the pressing roll 4, 5 corresponding to the rolling reduction quantity is operated by inputting to an arithmetic unit 12 the signal 10, 11 of the rolling reduction of the rolling reduction control device 8, 9 in the rolling reduction equipment 6, 7 of the width metal die 2, 3 which performs the width rolling reduction of a material 1. The pressing force adjusting device 17, 18 of the pressing device 15, 16 which performs the pressing of pressing roll 4, 5 is controlled by the operated command signal 13, 14. The generator of the problems of causing a flaw on the surface of the material 1 due to the excess pressing force or of the buckling of the material 1 due to the lack of the pressing force is thus prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for preventing buckling of a width press.

[Prior art 1] As shown in Fig. 3, it has been considered to reduce the width of a material 1 such as a slab using width press molds 2.3 provided opposite to each other at both width ends. At this time, buckling of the material is prevented by pressing the flat portion of the material 1 with a presser roll 4.5.

[Problem to be solved by the invention 1 However, in the past, it was difficult to press the presser roll 4.5 against the material 1 with a constant pressure regardless of the width reduction blade (loss) by the width press dies 2 and 3. To prevent bending, presser roll 4,
The pressing force applied by the presser roll 4.5 increases and becomes excessive, causing defects such as sinking into the material 1 as shown in Fig. 3, or when the width reduction ω is small, the pressing force applied by the presser roll 4.5 increases. Since the force was small, the holding effect was lost, causing problems such as buckling of the material FAI.

The present invention was made by focusing on the above-mentioned conventional problems.
The purpose is to prevent the occurrence of flaws and buckling of the material 1 by changing the pressing force of the presser roll according to the amount of width reduction (width reduction blade) of the width press die 2.3.

[Means for solving the problems] The present invention attempts to solve the above technical problems, and
The pressing force of the presser roll that presses down the flat part of the material to prevent material buckling during width reduction by the width press die is
This invention relates to a method and apparatus for preventing buckling of a width press, which is characterized in that the width press is changed and adjusted according to the width reduction ω by a width press die.

[Function] Therefore, in the present invention, by adjusting the material pressing force by the presser roll according to the width reduction amount by the width press die,
Excessive or insufficient material pressing force by the presser roll can be prevented.

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

FIG. 1 shows an example of the present invention, in which a reduction signal (or reduction blade) signal 10 of the reduction control devices 8 and 9 in the reduction device 6°7 of the width press die 2.3 that performs width reduction of the material 1 is shown. .11
is input into the calculation device 12 to calculate the pressing force of the presser rolls 4 and 5 according to the pressure reduction, and the calculated command signal 13
．． 14 is configured to control a pressing force adjusting device 17.18 of a pressing device 15.16 that presses the presser rolls 4, 5.

The amount of width reduction changes for each pass of material width reduction, as shown in FIG. 2, for example. For this reason, the pressing force of the presser rolls 4 and 5 is controlled according to the reduction amount m by the reduction amount signals 10.11 from the reduction control devices 8 and 9, and the command signal 13.14
The pressing force of the pressing devices 15 and 16 is controlled by changing the setting values of the pressing force adjusting devices W117 and W118.

In the above, taking into account the variation in the pressing force acting on the presser rolls 4 and 5 due to changes in the width reduction amount by the width press dies 2 and 3, the material pressing force of the presser rolls 4 and 5 is always kept constant. By controlling the pressure, it is possible to prevent problems such as flaws occurring on the surface of the material 1 due to excessive pressing force, or buckling of the material 1 due to insufficient pressing force.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and that various types of rolling devices and pressing devices can be adopted, and that the pressing force of the presser roll can be determined based on the width rolling blade instead of the width rolling reduction m. It goes without saying that the invention also includes control, and that various changes can be made without departing from the gist of the invention.

[Effects of the Invention] As described above, according to the method and device for preventing buckling of a width press of the present invention, by controlling the pressing force of the presser roll according to the amount of width reduction, the change in the amount of width reduction can be controlled. The material pressing force of the presser roll can be kept constant at all times.
Therefore, it is possible to achieve an excellent effect of preventing the occurrence of problems such as flaws on the surface of the material due to excessive pressing force or buckling of the material due to insufficient pressing force.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of variation in width reduction amount, and FIG. 3 is a front view showing an example of a conventional width reduction method. 1 is a material, 2 and 3 are width press molds, 4 and 5 are presser rolls, 6 and 7 are rolling devices, 8 and 9 are rolling control devices, 12 is a calculation device, 15.16 is a pressing device, 17.18 indicates a pressing force adjustment device. Patent application Hitoshi Kawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) During width reduction by the width press die, the pressing force of a presser roll for pressing the flat part of the material to prevent buckling of the material is adjusted according to the amount of width reduction by the width press die. A method for preventing buckling of a width press, characterized by changing and adjusting the width of the press. 2) A device that calculates the optimal material pressing force of the presser roll based on the width reduction amount of the width press die, and a pressing force adjustment device that sets the pressing force of the presser roll based on a command signal from the calculation device. A buckling prevention device for a width press, which is characterized by being provided with a buckling prevention device.