JPS58167010A - Rolling mill - Google Patents

Abstract

PURPOSE:To prevent the damage of machine parts and the deterioration of product quality caused by the vibration generating at the time of biting a material to be rolled, by constructing a rolling mill in such a way that the gap existing between a roll chock and a housing window in stopped by a hydraulic cylinder acting by detecting the tip of the material. CONSTITUTION:In a quadruple rolling mill constituted of upper and lower working rolls 1, 2, upper and lower back up rolls 5, 6 and roll chocks 3, 4, 7, 8, etc. used for supporting these rolls arranged in a housing, when the tip of a flowing material 13 to be rolled is detected by a photocell 9, a position-detecting signal is outputted from a position detector 10 to a controller 11. By this signal, the controller 11 actuates a hydraulic cylinder 12 to get rid of a gap by pressing the roll chocks 3, 4 against the housing. After biting the material, the hydraulic cylinder 12 is released by a time switch. At the time of roll rearranging, a worm 16 is rotated by a motor and the gap is enlarged by retreating a plate 18 through a worm wheel 15, a screw 14, and a nut 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill, and 41 provides a rolling mill that softens the horizontal impact toward the housing window of the rolls IjIIh that occurs when rolling material is bitten, and provides suitable working conditions. Regarding.

Conventional rolling mills were equipped with a mechanism to adjust the gap between the roll lock and the housing window, and there was no means to eliminate the gap between the rolling mills, which generates an impact force the size of an umbrella during rolling. This caused damage such as roll chocks to occur more quickly.

An object of the present invention is to provide a rolling mill 1 that prevents damage to various equipment and quality troubles caused by vibrations caused by rolling material.

The gap between the housing window and the roll chock was designed to be transparent from the beginning due to thermal expansion of the roll chock and housing during pressure treatment, to prevent tumbles when loading and unloading the roll assembly, and to shorten the roll change time. Vat is provided to ensure smooth insertion of the roll assembly into the housing.

However, due to this gap, the roll locks that catch the rolled material swing unstably within the housings on both sides.
When the tip of the rolled material is bitten by the upper and lower rolls in this state, the torque distribution between the upper and lower rolls becomes unbalanced, roll crossing occurs, and the impact force increases, resulting in repeated blows. This accelerates impact wear on the roll chock housing window surface. It is no exaggeration to say that 80% of the rolling impact in a rolling mill occurs when the rolled material is bitten. Furthermore, as the rolling biting speed increases year by year and the wear of the grooves increases, the vibration of the entire rolling mill becomes impossible to ignore.

The purpose of the present invention is to restrain such impact force (horizontal force) and eliminate the gap between the roll chock and the housing window only when the rolled material is caught. In the case of a quadruple rolling mill, etc., the work roll and reinforcement roll are offset during rolling, and the work roll and reinforcement roll are loaded with gap killing force on the side of the roll chock in proportion to the rolling reaction force. No roll crossing or rocking occurs inside. In addition, during rolling, the side surface of the roll chock is covered with l!
Since it requires 1 it, a mechanism is provided to reduce the gap between the rolled material and return it to the specified gap after biting, and at the same time widen it further when changing the rolls.

Embodiments of the present invention will be described below based on the drawings.

#! FIG. 1 is a side view of a quadruple rolling mill incorporating a roll chock pressing device according to the present invention. This rolling mill carries out rolling material [work rolls 1.2 and 1.2 to be rolled in contact with each other].
The rolls are arranged by reinforcing rolls 5.6 supporting 2. The work roll 1.2 is supported at the roll shaft end by a work roll chock 3.4 and the reinforcing roll 5.6 is supported by a reinforcing roll chock 7.8.

The present invention provides an arrangement between the conventional roll chock and the housing.
Ninth, the pressing of each roll chock kills O1!1M due to roll catching.The pressure that presses each roll chock is connected to the device, the hydraulic system that is the operating source, and the detector and controller that detect the rolled material when the rolls are rearranged. Multi-composed of widening screw mechanism.

When the rolled material 13 is flowing in the quadruple rolling mill shown in the first factor, the rolled material 13 is detected by the photocell 9 and enters the detector 10, and a detection signal is sent to the controller 11. When the detection signal is input, the controller 11 controls the control valve of the hydraulic circuit, and simultaneously supplies the required pressure oil to the hydraulic cylinders 12 in the upper and lower work roll chocks 3.4. Roll chocks 8, 4 [Kill the p-gap by pressing against the housing. After biting, the hydraulic cylinder 12 is released by a time switch n1, and at the same time, the roll chocks 3 and 4 are also released, returning to the proper gap between the roll chock and the housing, and rolling continues. The above operation is repeated when the rolled material is bitten.

The screw mechanism that widens the cap when replacing the rolls will be explained with reference to FIG. The screw mechanism is screw 14. Natsu 17. The plate 181 is composed of a worm wheel 15° and a worm 16 side, and when the rolls are changed, the worm wheel 15. Screw 14. The gap is widened by pulling the plate 1st through the nut 17. Also, when returning the gap, the worm 16 can be reversed to obtain a proper clearance.

In this example, the gap killing signal tsen t- (HMD) was used, but in the case of a tandem mill, etc., the previous stage jamming signal (
A similar purpose can be achieved by using a load cell or main motor power supply, etc.).

Also, although this example was explained using a four-fold rolling mill, a six-fold rolling mill,
Of course, it can also be used in cross mills, etc.

According to the present invention, it is possible to restrain the impact force generated when the rolled material is bitten. It also depends on smooth roll changes.

[Brief explanation of drawings]

FIG. 1 is a side view of a rolling mill equipped with the mechanism of the present invention, and FIG. 2 is a plan view of the rolling mill equipped with the mechanism of the present invention.

Claims (1)

[Claims] 1. In the roll lock and housing of the rolling mill, a mechanism that can freely move forward and backward in the horizontal direction perpendicular to the roll axis and a sensor that catches the tip of the rolled material are used together.t41
A rolling mill that makes mold.