JPS62214812A - Detection device for roll gap - Google Patents

Abstract

PURPOSE:To accurately measure roll gaps without influences of rolling oil and vibration by installing a noncontact type roll gap detector whose height is to be adjustable on the top and the bottom of a block movable in the rolling direction. CONSTITUTION:A block 13 is slidably fitted in a guide member 12, levers 15 and 16 are supported to be capable of opening and closing in the appearance of scissors appearance on a pin 14, and eddy current type roll gap detectors 19 and 20 are fixed to respective top heads 17 and 18 of the levers 15 and 16. For measurement of roll gaps, gaps y1 and y2 are measured by moving a piston rod 22 left, adjusting an opening angle of the levers 15 and 16, and fixing them with a fixture 21. The prescribed control valve is controlled in proportion to gap variation amounts for controlling oil amounts to a screw down cylinder. The detectors 19 and 20 accurately detect the gaps because the noncontact type detectors are not affected by the rolling oil and vibrations cause variations only due to a relative position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll gap detection device that accurately measures the roll gap by 1q.

[Prior Art] A conventional general rolling mill is shown in Fig. 4, in which 1 and 2 are a pair of upper and lower work rolls, and 3.4 is an upper and lower work roll 1.
．． 5 is a lowering cylinder equipped with a position detector 6 such as Magnescale, 7 is an axle box that supports the lower supporting roll 4, and the piston rod 5a of the lowering cylinder 5 is connected to the axle box 7. It is in contact with the bottom surface.

In the above-mentioned rolling mill, when measuring the roll gap H between the upper and lower work rolls 1 and 2, conventionally this is done by detecting the amount of movement of the piston rod 5a using the position detector 6. In this case, the detection accuracy is poor due to the influence of the deflection and eccentricity of the hold-down rolls 3 and 4, and the elastic collapse of the rolls.

Therefore, in order to solve this problem and improve detection accuracy, an optical and non-contact position detector 10 is attached to the axle box 8 that supports the upper work roll 1, as shown in FIG. A bracket 11 is attached to the axle box 9 that supports the lower work roll 2.
(=I, position detector 10 by position detector 10)
It has been proposed to measure the distance between the bracket 11 and the bracket 11 and thereby measure the roll gap. Due to the influence of backlash, the accuracy of the detector does not improve appreciably.

On the other hand, in order to further improve detection accuracy, it is necessary to directly detect the distance between the roll barrels of the upper and lower work rolls 1 and 2 using a roll gap detector.

[Problems to be Solved by the Invention] However, when the above-mentioned roll gap detector detects the distance between roll barrels using, for example, an optical detector, the detection accuracy decreases due to the influence of rolling oil, and the durability deteriorates. Furthermore, if an eddy current type detector that is not affected by rolling oil is used as a roll gap detector, the detection accuracy and durability will be improved without being affected by rolling oil, but the roll gap It becomes necessary to insert the detector into the gap between the rolls,
Furthermore, there are problems such as the detection accuracy not being as expected unless displacement due to imaging can be canceled.

The present invention has been made in view of the above-mentioned circumstances, with the object of making it possible to accurately detect the roll gap between work rolls of a rolling mill using an eddy current type roll gap detector. .

[Means for Solving the Problems] The present invention provides a non-contact type roll gap detector for detecting the roll gap in a roll barrel section on the upper and lower surfaces of a block that is movable in a direction parallel to the direction of rolling material progress. The structure is such that the position can be adjusted in the height direction.

[Function] When measuring the roll gap, the roll gap detector is adjusted in the direction parallel to the rolling material progress direction and in the height direction, and the gap from the roll gap detector to the roll barrel is adjusted to the optimum state, and the roll gap is The roll gap is measured in the barrel section, but the roll gap detector is not affected by rolling oil, and the relative positions of the upper and lower roll gap detectors do not change, so even if the block vibrates during measurement, the upper and lower roll gap detectors will not be affected by the rolling oil. Roll nip is canceled.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which a guide member 12 is disposed on the entry side or exit side of the rolling mill, and the guide member 12 is provided with one movement in a direction parallel to the rolling material progressing direction. Obtain block 1
A pair of levers 15.3 are fitted onto pins 14 fixed to the block 13, and are rotatable up and down.
16 so that it can be opened and closed like scissors, and the pin 1
4, a piston rod 2 of a fluid pressure cylinder 22 for pushing and pulling the block 13 in a direction parallel to the rolling material traveling direction;
2a, a head 17.18 is fixed to the tip of the lever 15.16 on the roll gap side, and a surface of the head 17.18 facing the roll and substantially parallel to the tangential direction of the roll outer circumference,
Eddy current type roll gap detector 19.2 for measuring the roll gap between the upper and lower work rolls 1 and 2 in the roll barrel section
0, and a lever fixing fitting 21 is removably attached to the opposite end of the lever 15.degree. 16 on the side of the roll gap so that the scissor-like lever 15.degree.

When measuring the roll gap between the upper and lower work rolls 1 and 2, the block 13 is slid along the guide member 12 by the hydraulic cylinder 22, and the scissor-shaped levers 15, 16 are moved.
The angle of inclination of the levers 15 and 16 is adjusted by rotation around the pin 14, and the levers 15 and 16 are fixed by the lever fixing fittings 21, thereby positioning the roll gap detectors 19 and 20 relative to each other as if they were attached to one member. Ensure that the relationship does not change during roll gap measurement.

When measuring the roll gap with the roll gap detector 19.20 in such a state, the gaps y1 and y2 of the roll barrel parts are
is measured, the roll gap change Ay is corrected to the roll gap change in the vertical direction between the upper and lower work rolls 1 and 2 based on these yl and y2, and the opening degree of the control valve is controlled based on this value. Controls the amount of pressurized oil supplied to the pressure reduction cylinder 5 in Fig. 4.

The levers 15, 16 are fixed by lever fixing fittings 21 so that the relative positional relationship of the roll gap detectors 19, 20 does not change, so even if the roll gap detectors 19, 20 move up and down due to vibration, , unless the roll gap between the upper and lower work rolls 1 and 2 actually changes, if yl increases, y2 decreases by the amount of increase in yl, and if y] decreases, y2 increases by the amount of decrease in y1. Therefore, measurement errors due to vibration are canceled.

FIG. 3 shows another embodiment of the present invention, in which a block-shaped head 23 is fixed to the tip of a piston rod 22a of a fluid pressure cylinder 22, and the upper and lower surfaces of the head 23 are formed into an inclined shape substantially parallel to the tangential direction of the roll outer circumference. , in the hole drilled in the inclined shape part,
Eddy current type roll gap detectors 19 and 20 whose position can be adjusted in the height direction are fitted and fixed. As means for adjusting the position of the roll gap detectors 19, 20 in the height direction, a liner is inserted into the hole or a push bolt is provided.

Even with such a configuration, the roll gap can be accurately detected at the roll barrel portion.

In addition, in the embodiments of the present invention, the case where the roll gap detection device is installed on one side of the rolling input side or the rolling exit side has been described, but it can be implemented even if it is installed on both sides of the rolling input side or the rolling exit side. It goes without saying that various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] The roll gap detection device of the present invention has the above-described configuration.
Therefore, the roll gap can be accurately measured without being affected by rolling oil or vibration at the roll barrel portion, which is an excellent effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the roll gap detection device of the present invention, FIG. 2 is a detailed view of the lever tip of the roll gap detection device of FIG. 1, and FIG. 3 is another embodiment of the roll gap detection device of the present invention. FIG. 4 is an explanatory diagram of an example of a conventional roll gap detection device, and FIG. 5 is an explanatory diagram of another example of the conventional roll gap detection device. In the figure, 1 is an upper work roll, 2 is a lower work roll, 12 is a guide member, 13 is a block, 14 is a pin, 15.16 is a lever, 17.18 is a head, 19.20 is a roll gap detector, and 21 is a The lever fixing metal fitting 22 indicates a fluid pressure cylinder.

Claims (1)

[Claims] 1) Non-contact type roll gap detectors for detecting the roll gap in the roll barrel section are installed on the top and bottom surfaces of a block that is movable in a direction parallel to the rolling material progressing direction so that the position can be adjusted in the height direction. A roll gap detection device characterized by: