JP2915447B2 - Method and apparatus for inspecting surface of roll after polishing - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting fine irregularities, particularly chattering, on a surface of a roll used for rolling an aluminum foil or the like after polishing the roll.

[Conventional technology]

Since the surface of a roll of this type is damaged by use, it is usually used after being polished periodically. However, in the polishing step, a very fine axial stripe pattern, that is, so-called chattering may be generated on the roll surface. Of course, such irregularities are harmful to rolling,
Roles cannot be reused.

Conventionally, to check whether chattering has occurred on the roll surface after polishing, the roll surface is rotated at a low speed while irradiating a spotlight on the roll surface, and visual judgment is made.

However, in such a method, it is difficult to determine the chattering. For this reason, for example, when polishing with fine sandpaper, the chattering emerges and the determination becomes easy.
This time, the abrasion of the sandpaper remains, and again requires repolishing.

[Problem of the Invention]

Therefore, an object of the present invention is to detect chattering accurately using a measuring instrument, instead of a visual feeling.

[Means for solving the problem]

In order to solve the above-mentioned problem, in the present invention, a relatively long rod placed on one end on a round bar and supported swingably is brought into contact with the polished roll surface to keep the roll constant. While rotating at a speed, the vibration at the contact portion of the rod with the rolling roll is detected by a vibration sensor attached to the contact portion of the rod, and this is detected by a vibrometer at both ends and the center of the rolling roll. Measurement was made and chattering was detected by comparing these measured values.

[Action]

The chattering tends to occur at the central portion of the rolling roll. Therefore, when the measured value at the central portion is higher than that at both ends, it is understood that chattering has occurred.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in the drawing, a flat iron rod 2 is in contact with the surface of a rolling roll 1 which is an object to be inspected. The rod 2 has a chevron member 3 fixed at one end, and a cushion sheet 4 made of thin rubber, synthetic resin, or the like adhered to the inner surface of the rod 2. The angled member 3 is mounted on a round bar 5, and the rod 2 is swingable around the round bar 5. It is preferable that a cushion sheet 6 made of a thin rubber, a synthetic resin, or the like be fixed to a contact portion between the rod 2 and the roll 1.

A sensor 8 is attached to the surface opposite to the contact surface between the roll 1 and the rod 2 via a fixture 7 such as a magnet. The sensor 8 is a vibrometer 9 (for example, a VM manufactured by Lion Corporation).
−28).

Now, when the roll 1 is rotated at a constant rotation speed, if the surface of the roll 1 has irregularities, the vibration is sensed by the sensor 8 via the rod 2 and the attachment 7 and measured by the vibrometer 9.

Empirically, chattering occurs almost at the center of the roll 1, and therefore, in practice, it is sufficient to compare the vibration measurement values obtained by the vibrometers 9 at the center and both ends of the roll 1. That is, it is sufficient to detect whether or not the vibration measurement value at the center of the roll (which may be the acceleration of the vibration) has a significant difference in magnitude as compared to the both ends.

〔effect〕

According to the present invention, as described above, the swingable rod is brought into contact with the roll after polishing, and the vertical movement of the rod is measured by the vibrometer. This makes it easy to detect chattering, which has been difficult to perform, and also has an effect in reducing manpower.

[Brief description of the drawings]

FIG. 1 is a diagram showing an inspection apparatus of the present invention. 1 ... rolling roll, 2 ... rod, 3 ... angle member, 4 ...
Cushion sheet, 5: round bar, 6: cushion sheet, 7: mounting fixture, 8: sensor, 9: vibrometer.

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hideyuki Yukimura 4-1-1 Aioimachi, Yao-shi, Osaka Toyo Aluminum Co., Ltd. Yao Works (56) References JP-A-58-22901 (JP, A) 58-109008 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01B 5/00-5/30 G01H 17/00

Claims (2)

(57) [Claims] 1. A relatively long rod, one end of which is mounted on a round bar and supported swingably, is brought into contact with the polished roll surface,
While rotating the rolling roll at a constant speed, vibration of the rod in contact with the rolling roll is measured at both ends and the center of the rolling roll, and chattering is detected by comparing these measured values. Surface inspection method of the roll after polishing. 2. An end is placed on a round bar and supported swingably,
A relatively long rod with the other end in contact with the surface of the rolling roll,
A surface inspection device for a polished roll, comprising a vibration sensor attached to the upper surface of the other end of the rod and a vibrometer for measuring a signal from the sensor.