JPH06170564A - In-line laser dull-working device - Google Patents

Abstract

PURPOSE:To enable dull-working in line and to contrive the improvement of workability and the reduction of grinding cost by transferring a laser to rolling rolls with fibers for transferring and converging it on the surface of roll after adjusting the position. CONSTITUTION:The laser which is emitted from a laser oscillator 1 is transferred to work rolls 5 for rolling with the fibers 2 for transferring. The adjustment of position is executed by driving stages 3 for controlling working position in the axial direction and radial direction of the rolls 5 and dull-working is executed by converging the laser on the surfaces of rolls 5 by using condenser lenses 4 mounted on the stages 3. The deterioration of working is prevented by executing gas purge to prevent the soiling on the surfaces of the condenser lenses 4. In this way, roughness is recovered in-line without pulling the work rolls 5 for rolling out of a rolling mill.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-line laser dulling machine, and its purpose is to recover the roughness of a rolling roll.

[0002]

2. Description of the Related Art Rolling rolls have their roughness reduced in inverse proportion to the rolling tonnage, and rolls are exchanged at a constant tonnage.
In the roll replacement, the line is stopped and replaced, and the roll replacement is spent for 10 to 40 minutes. The roll pulled out from the rolling mill is grinded off-line after off-line, and there are shot dull processing, electric discharge dull processing, and laser dull processing. In laser dull processing, a roll for rolling is processed by transferring a laser to a mirror.

[0003]

In the prior art, the rolling roll is pulled out from the rolling mill in order to recover the roll roughness, and the dull processing is performed after grinding off-line, so that the work rate of the rolling line is reduced, the grinding cost is increased, and the roll is used. It caused a decrease in rotation.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve the problems of the prior art in an advantageous manner and includes a laser emitting device, a laser transfer fiber, an XY stage for processing position control, and a laser condenser lens. The in-line laser dull processing device consisting of is used to dull in-line to recover the roll roughness.

FIG. 1 is a diagram showing an embodiment of the invention. The laser oscillator 1 is provided with a Q switch for making a pulse laser inside the oscillator, and can emit a pulse laser of 1 KHz to 99 KHz. The transfer fiber 2 is for transferring the laser emitted from the laser oscillator to the roll. X- for machining position control
The Y stage 3 is positionally adjustable in the roll axial direction and the roll radial direction, and is driven by a motor. A laser condenser lens is mounted on the XY stage. The laser condensing lens 4 is a lens for condensing the laser beam transferred from the fiber on the roll surface, and gas purging is performed in order to prevent the lens surface from being contaminated, thereby preventing workability deterioration. The work roll 5 for rolling is a roll for rolling a steel strip, 6 is a backup roll for rolling, and 7 is a steel strip.

FIG. 2 is a detailed view of the laser condensing lens portion. Reference numeral 8 is a gas purging hose, and 9 is a mount, which is divided into two parts so that it can slide in the roll radial direction. Reference numeral 10 is a condenser lens protective cover that minimizes damage at the time of breakage. Further, the front part of the protective cover has a gas injection hole, and the disturbance of rolling oil or steam is scattered by the purge gas to maintain stable workability. Reference numeral 11 denotes a lens group for focusing the laser beam transferred by the fiber on the roll surface. Reference numeral 12 is a laser focusing lens. Reference numeral 13 is a drive motor for sliding the gantry in the roll radial direction.

FIG. 3 is a detailed view of the XY stage for processing control, in which 14 is a slide table, 15 is a screw screw for moving the condenser lens mount to the processing position, and a reverse screw is cut from the screw center. Yes, it simplifies the device. Reference numeral 16 is a drive motor for rotating the screw screw.

[0008]

According to the present invention, it is possible to recover the roughness inline without pulling out the rolling roll from the rolling mill, and the time during which the line is stopped can be operated every time the roll is exchanged. Contributes to reducing grinding costs. Laser dull processing of rolling rolls is generally performed with a mirror for laser transfer, but since it is difficult to keep the mirror clean in a bad environment, using fiber for laser transfer facilitates engineering. In addition, the laser can be transferred up to just before the rolling roll with a transmittance of 98% or more regardless of the environment around the rolling mill.

The current rolling schedule for cold rolling is rolling from a wide material to a narrow material, and if the width is reversed, roughness irregularities called edge marks are transferred to the steel sheet, degrading the surface appearance quality of the product. However, by installing an inline laser dull processing device on the cold rolling final stand, edge marks are prevented and cold rolling schedule-free rolling becomes possible.

[0010]

According to the present invention, in order to recover the roll roughness, the rolling roll is not drawn out from the rolling mill, but is directly in-line processed into the roll, so that the working rate of the rolling line is improved, the roll unit and the grinding are performed. The cost can be reduced, and the number of roll stocks can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

[Fig. 2] Detailed view of the laser condenser lens unit

FIG. 3 is a detailed view of an XY stage for processing control.

[Explanation of symbols]

 1 Laser Oscillator 2 Transfer Fiber 3 XY Stage for Processing Position Control 4 Laser Focusing Lens 5 Work Roll for Rolling 6 Backup Roll for Rolling 7 Steel Strip 8 Gas Purging Hose 9 Stand 10 Focusing Lens Protective Cover 11 Lens Group 12 Laser condensing lens 13, 16 Drive motor 14 Slide table 15 Screw screw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhide Tagata 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corp. Kimitsu Steel Co., Ltd.

Claims (1)

[Claims] 1. A laser oscillator equipped with a Q switch for forming a pulse laser in the laser oscillator, a laser transfer fiber for transferring a laser emitted from the laser oscillator to a rolling roll, and a roll axial direction and a roll radial direction. An in-line laser dull processing apparatus comprising: an XY stage for controlling a processing position, which is positionally adjustable, and a condenser lens for collecting a laser beam transferred by a fiber on a roll surface.