JPS59179207A - Method for processing rolling roll - Google Patents

Abstract

PURPOSE:To perform highly accurately and efficiently profile-processing in in- line by melt cutting a roll into a target profile with the aid of a laser beam basing on a wearing profile of the roll measured by irradiating the laser beam onto the roll surface. CONSTITUTION:A roll profile is measured by irradiating a laser beam for detection to the surface of a roll R while moving a displacement-meter head 11 along the roll R surface. At that time, the position change of a measuring point is detected by a pulse generator 18 to store the detected results in the memory of a microcomputer 19 by making the results correspond to the measured profile. The roll R is processed basing on the stored information by moving laser-beam heads 2a, 2b for melt cutting in the direction of the roll R axis while rotating the roll R. That is, the necessary positions and quantities of melt cutting, based on the processing conditions necessary for obtaining a prescribed profile from the stored information, are obtained. The computor 19 gives instructions to a driving device 6 of the head 2 and a laser generator 7 in accordance with the positions and quantities of melt cutting mentioned above to control the feeding speed of the head 2 and the laser intensity.

Description

[Detailed Description of the Invention] The present invention relates to a method for processing rolling rolls with high viscosity and high efficiency, and is suitable for immediate infin processing of rolls (processing the rolls while they are still installed in the rolling mill). Regarding.

As the rolling process progresses, the rolls undergo +4, H: (, and the initially set shape begins to collapse.Therefore, the rolls are replaced when this wear reaches the allowable limit.This roll change The used rolls extracted from the rolling mill are processed with off-fins to give them the desired roll profile and surface condition, and are recycled.

At δ, in addition to this processing of the stiff roll, a grinding process (tentatively called shape processing) is performed to remove wear due to use, roughness, scratches, etc., and at the same time give the required profile /I/. A process that engraves unevenness such as a satin pattern on the roll surface (
(tentatively called surface kaloe). However, generally 1
From the point of view of efficiency, tool machining using a grindstone or a cutter can be adopted for 11 types, but the latter requires shot machining or electric discharge machining, and therefore at least two types of tool machining are usually used for roll machining. Processing equipment must be prepared. Moreover, the above-mentioned tool machining requires large equipment, wear and tear, cracks, and deformation of the tools used, and delicate control of grinding is also difficult! In addition, shot machining and electric discharge machining also require processing of the blown shot balls, machining stability,
There are some deficiencies in terms of efficiency.

On the other hand, since rolling is interrupted to change the rolls, and the work itself is time-consuming, it is desirable to reduce the frequency of this work as much as possible. In order to extend the period between roll changes as much as possible, in rolling mills that roll several types of nuhupu with different widths, the following setup is generally carried out every time roll 0 is replaced with a new roll. Rolling is continued. In addition, we started by rolling the widest material,
The rolling target is gradually changed to a narrow material.In other words, once rolling of a certain width material is continued, the roll (1) is changed to the width of the material being rolled, as shown in Figure 1.
1] (W/) Only the part (1) corresponding to the area (1) is subject to wear, but in this state it was rolled in the previous @Zoku Tetsu, l:Q wide [1
] If a steel sheet is rolled, the plate thickness will become thicker in the area corresponding to the worn area (1), resulting in poor accuracy. If rolling is carried out on the narrow and narrow rolls first, it will be necessary to change the rolls as soon as the next wide roll is rolled.

However, the necessity of rolling from wide width to narrow width and changing 71 shapes in this way poses a major constraint on the rolling process and is extremely inconvenient.

For example, the rolling order does not match the delivery date or storage order, which may cause the rolling month to be rearranged or product delivery to be delayed.

In addition, even if such a roll schedule is adopted, it is very possible to extend the period until the low/I/low change, and in reality there are cases where the change is forced after only 24 hours of continuous use. Not even a few.

So-called infin processing of rolls can be considered as an effective method for resolving such restrictions on roll schedules and extending the period during which rolls need to be replaced. According to in-line machining, depending on the wear
The roll profile or surface condition can be optimally maintained or modified, and by carrying out such machining operations, it is possible to achieve the so-called schedule-free rolling, which is advantageous and does not restrict the rolling process. This makes it possible to realize this and dramatically extend the period until roll change.

The processing method applied to this infin processing is such that the equipment can be structurally incorporated into the rolling mill V' roll/I/ without major damage, and that processing waste (7i7T cutting chips, tool scraps, etc.) can be easily incorporated into the rolling machine. It is necessary that there are no problems with the processing.

It is difficult to say that any of the conventional methods mentioned above are suitable for this condition.

In line with the above conditions, is water produced by high-pressure water such as water?
il+cut is considered effective. However, for infin machining, accuracy and controllability are also important points, and it is also necessary to be able to perform high-speed machining, which is inferior to water grinding in these respects, making it impractical. I can't say it. In addition, it cannot be expected to form unevenness such as a satin pattern.

The present invention not only enables high-rolling fabric and highly efficient shape machining, and also enables delicate control of machining conditions, the equipment used can be small, and there are no problems such as machining waste or wear and tear on tools. Furthermore, the solvent equipment used in the method is also useful for the surface processing, and therefore, the object of the present invention is to provide a roll processing method that is particularly effective for in-line processing.

That is, the present invention includes a processing method using a laser beam. First, the surface of the roll is irradiated with a laser beam for displacement detection to actually measure its low/I/abrasion shape, and based on the measured results, the laser beam is irradiated 11q so that the roll has the target roll shape. The gist of the present invention is a method for processing a rolling roll, which is characterized by blowing a gas around the [(alpha) position to form a solvent.

In melt cutting using laser beam irradiation, since the energy density of the laser beam as a heat source is extremely high, high-speed processing is possible, and at the same time, extremely high processing accuracy can be expected. this? Bath agents are used to instantaneously melt the surface of an object to be irradiated by irradiating it with a laser beam.
Since evaporated matter or melted matter caused by beam irradiation can be efficiently removed, a solvent surface with better precision can be obtained. This gas can be sprayed through the hole (3) attached to the tip of the laser beam spatula F (torch) (2j) shown in Figure 2, or by installing a separate spray nozzle (4). can.

Further, regarding the measurement of the surface shape (condition) using a laser beam, the specific means will be described later, but this also has extremely high accuracy.

High precision measurement with an error of about ±5μ is possible.

Therefore, according to the method of the present invention, shape processing with high accuracy and control efficiency can be realized, and at the same time, highly accurate control is possible. Furthermore, the solvent generated by laser beam irradiation does not cause any problems such as generation of door debris or wear and tear on tools. In terms of equipment, it has the advantage that the optical system is the main component and does not require a large device, and the laser beam solvent equipment used to carry out this method can also be used for surface treatments such as satin finishing. It also has the advantage of being easy to do.

Therefore, the method of the present invention can be extremely advantageously applied not only to off-line roll processing but also to roll processing with infins as is, and the period until roll change can be dramatically reduced by implementing in-line processing. This makes it possible to fully realize extension and schedule-free rolling.

Next, a specific example of the method of the present invention will be described.

FIG. 3 is an explanatory diagram conceptually showing an example of an apparatus for carrying out the method of the present invention.

In the same figure, ■ is the rolling roll to be processed, (2
a, ), (21)) are processing laser beam heads shown in FIG. 2, which are installed so as to irradiate a laser beam toward the surface of the roll. In the illustrated example, a pair of left and right rollers are provided in parallel in the roll axis direction, and each of them is supported by a guide (5) and is movable along the guide (5). Each beam head (2a) (2'b)
A drive device (6aX6'l) is attached to the , and the structure is such that it is moved by this drive. Each beam head (
2), laser oscillators (
The laser beam (A) generated in 7a) (7'b) is supplied, and this beam passes through the focusing lens (
(not shown) onto the roll surface. FIG. 4 shows this optical system in the case of infin processing. That is, the upper and lower work rows/' (R1) (R
2) A pair of left and right beam heads (2aX2
The laser oscillators (7a) (7b) are installed on the upper and lower two heads on each side (left and right); The laser beam passes through the beam tube (8/) (8x) and is refracted by a polarizing mirror or a transparent polarizing mirror, and passes through each beam head (
2a) (21)). In this case, the horizontal beam tube (8-2) f the guide (5
).

In Figure 3, 71'' (2a) (2b)
) Each VC is equipped with a sensor for detecting the position in the roll axis direction, such as a pulse generator (9a) (9'b).

αO is a laser-based roll profile meter, which is equipped with a displacement needle head having the following structure.The structure is shown in Fig. 5, and the laser beam oscillated by a laser diode (6) (a) is passed through the focus detection mechanism α■, and then reaches the roll surface 0 through the light-receiving lens (14).The focus of the beam spot on the roll surface is detected through the light-receiving lens 0Φ. Detected by mechanism α■, then this beam spot diameter (4)
The position of the light-receiving lens (distance from the roll surface) is automatically adjusted by a high-speed micro servo motor (IF9, C!ll) so that it is within a pre-specified tolerance range.
At this time, the displacement of the light receiving lens (14) is extracted from the servo motor α0, and the condition (wear condition) of the roll surface (G) is determined.
This displacement meter head (11)
Like the processing laser beam head (2), it is supported by a guide a0, and is moved along the guide a0 in the reroll axis direction by a drive device (6c). A controller α force is connected to the displacement meter head α, which controls the detection operation of the displacement meter head and at the same time extracts the amount of displacement of the light receiving lens (14) from its operation. Microcomputer in charge of solvent control -〇Q) Input Ic. A roll axial position detection sensor, such as a pulse generator α8), is also attached to this displacement meter head (11).

If the apparatus having the above configuration is used, the roll processing according to the present invention can be performed as follows using the microcomputer 〇〇.

In other words, first run the displacement meter head 0D of the profile maker α0 over the entire length of the roll side barrel or a required part (both ends) to actually measure the wear condition of the roll and the roll profile. .

This actual measurement is carried out over the entire circumference while rotating the RO/I/, and it is preferable to take the average for accuracy. Often, a single measurement is sufficient. During this measurement, the pulse generator 08) detects the change in the position of the measurement point, and stores it in the memory of the microcomputer 09) in parallel with the celestial measurement result. The X-axis is taken in the direction of the roll axis, and the y-axis is taken in the direction of the rear of the roll.
Assuming that the orthogonal coordinates are I-, the points on the roll surface are stored in the form (x, y).

■ Based on the information about the roll profile obtained in this way, the solvent racer beam head (2ε, ) (2b) is then rotated at a predetermined speed.
Move the awn along the roll axis direction to perform awning 1.

That is, from the information stored, the processing conditions necessary to obtain the desired roll profile, the locations where cutting consultation is required, and the amount of solvent therefor are determined. When applying the solvent, use the laser beam head (2a) (2) for the solvent according to the required processing conditions determined previously.
b) Give commands to the drive unit W (6a) (6'b) and the racer oscillator (7a, X71)) to drive the head (
2) The feed rate and beam intensity are adjusted so that the roll is formed into the desired profile.

Note that after the above processing, the same operation cycle may be repeated one or more times, which is effective in ensuring processing accuracy.

Further, the profile 411 laser used in the method of the present invention and the solvent laser may share a laser oscillator, and the laser beam may be used for both purposes by switching the intensity.

FIG. 6 (This is a flowchart showing an embodiment of the present invention method, which is particularly suitable for infin processing. The symbols used in the flowchart are as shown in FIG. 7. The equipment used is exactly the same as in FIG. 2. The same is true.In this method, during rolling, the roll profile is constantly positioned for a certain period of time, and when wear progresses and exceeds a predetermined tolerance range, it is detected. Then, in the evening, remove the area that requires cutting to correct the wear and apply a bath agent to the area.

After 141J of this melting (7), the o-rubrofil was measured again and fed back, and if it was detected that the solvent was still insufficient, the solvent was added for one month. This cycle is repeated until it is within the range of the roll force.

If such a processing method based on feedback control is adopted, the rolls can be kept in the proper shape for as long as necessary for as long as necessary, despite the progressive wear of the rolls during rolling. It is possible to maintain f.

As explained above, the method of the present invention uses a racer for both roll profile measurement and roll machining, so the machining accuracy is extremely high and the efficiency is very high. It is also extremely suitable for infin processing. Therefore, the present invention can be said to have extremely high utility value, particularly in extending the row/L/change period m1 and centralizing nucleation-free rolling through the introduction of infin processing.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining how to grind worn roll surfaces for schedule-free rolling, Fig. 2 is a schematic explanatory diagram showing the roll melting method used in the method of the present invention, and Fig. 3 is a diagram illustrating the method of grinding the worn roll surface for schedule-free rolling. FIG. 4 is a schematic explanatory diagram showing the body and body side of the equipment for carrying out the roll processing method; FIG.
The figure is an explanatory diagram of a laser set profile meter used in the method of the present invention, Figure 6 is a flowchart showing a specific example of the method of the present invention suitable for in-line processing, and Figure 7 is the symbols used in the flowchart of Figure 6. FIG. In the figure, 2: laser beam head 13: hole for spraying, 4: nozzle for spraying, 5 guide, 6
: Drive device, 7: Racer oscillator, 8: Beam 9, q
: Pulse generator, 10: Profile meter, 1
1: Displacement meter head, I2: Laser diode, 13:
Focus detector line!・, 14: Light receiving lens '15': High speed micro servo motor, 16: Guide, 17: Controller, 1
8: Pulse generator, 19: Microcomputer - Applicant: Sumitomo Metal Atsushi Industries, Ltd.

Claims (1)

[Claims] (1) Roll surface A method for processing a rolling roll, characterized by spraying Ganu in the vicinity of the irradiation position while applying a bath.