KR101203632B1 - Measurement of roll gap for the twin roll caster - Google Patents

Abstract

The present invention relates to a method for accurately measuring the roll gap using a load cell in order to be able to quickly and accurately measure the roll gap in the two-win roll caster during strip casting, which can adjust the gap between the upper and lower rolls constant Installing each load cell between both roll shafts of the upper and lower rolls and the roll frame; Inserting a measurement object of a material having the same thickness and the same modulus of elasticity at both ends of the upper and lower rolls in which the load cell is installed; The upper and lower rolls in which the measurement object is inserted are moved to the upper side until the pressure values of the load cells installed on both sides of the movable lower rolls are equal to each other, thereby adjusting the roll gap.

2win roll, load cell, upper / lower roll, roll gap

Description

Measurement of roll gap for the twin roll caster {Measurement of roll gap for the twin roll caster}

1 is a first embodiment for explaining a roll gap measurement method of a two-roll roll caster according to the present invention.

Figure 2 is a second embodiment for explaining a roll gap measurement method of a two-roll roll caster according to the present invention.

※ Explanation of symbols on main parts of drawing ※

1: upper roll 2: lower roll

3: upper roll shaft 4: lower roll shaft

5: roll frame 6: load cell

7: extensometer 8: measuring object

9: gap

The present invention relates to a roll gap measuring method of a two-win roll strip caster that can easily and quickly measure and correct the gap between rolls of the strip caster in a short time during casting of the two-roll roll.

One of the most important requirements of a sheet produced by strip casting is the longitudinal thickness variation of the sheet. This thickness variation is absolutely influenced by the roll gap between the two rolls of the caster.

The gap between the rolls of the conventional two-win roll strip caster is mainly determined by visual observation, and the roll gap is adjusted by measuring the thickness of the rolls by inserting thin and long bars and plates between the rolls at both ends of the rolls. The method has been used.

However, this method is difficult to adjust the roll gap quickly and has a problem of inaccuracy, so it is not possible to solve the long thickness variation of the sheet, which is one of the most important requirements of the sheet produced by the strip casting method. There is this.

In addition, only highly skilled workers can adjust the roll gap by visually adjusting and adjusting the roll gap by inserting thin and long bars and boards between the rolls at both ends of the longitudinal direction. There are disadvantages.

Accordingly, the present invention has been invented to solve the above problems, and an object thereof is to provide a method for measuring roll gaps easily and quickly and setting a standardized standard regardless of an operator.

Characteristic technical features of the present invention for achieving the above object is to load each load cell between the roll frame and the roll frame on both sides formed on the upper roll so as to adjust the gap between the upper and lower rolls at the time of two-win roll strip casting A load cell installation step of installing; A zero point setting step of moving the lower and lower rolls of the upper and lower rolls to the upper side to bring the upper and lower rolls into close contact with each other and then moving the lower rolls downward until both load cells become zero at the same time; An extensometer installation step of installing an extensometer at both ends of the upper / lower rolls when both load cells become zero at the same time; And when the extensometer is installed to move the lower roll to the lower in order to maintain the gap of the upper / lower roll as desired, the image to move so that the extension value of the extensometer installed on both ends of the upper / lower roll to maintain the same value / Lower roll spacing step.

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Referring to the accompanying drawings, the roll gap measuring method of the two-win roll strip caster of the present invention having the characteristics as described above in detail as follows.                     

First, as a first method, as shown in Figure 1, the upper and lower rolls (1, 2) of the upper roll (1), that is, the roll shaft (3) formed on both ends of the fixed roll and the roll frame ( 5) The load cell 6 which measures each pressure is installed in between.

Then, the measuring object 8 of the material having the same thickness and the same modulus of elasticity is inserted into both ends of the upper and lower rolls 1 and 2, that is, a sheet or a bar. As described above, when the measuring object 8 of the plate or bar is inserted at both ends between the upper and lower rolls 1 and 2, the lower roll 2 capable of moving in the upper and lower rolls 1 and 2 is movable. What is necessary is to adjust the desired roll gap 9 by moving upwards until the pressure value of the load cell 6 installed in the both sides is the same.

When the gap 9 of the upper and lower rolls 1 and 2 is adjusted in the above manner, this means that the gaps 9 of the upper and lower rolls 1 and 2 are the same from one end to the other end, Thus, the resulting strip is capable of producing a good quality product with the same thickness of the plate.

In the second method, as shown in Fig. 2, the upper and lower rolls 1 and 2, which are installed on the upper roll 1, that is, the roll shaft 3 and the roll frame 5 formed at both ends of the fixed roll 5, respectively. The load cell 6 which measures each pressure is installed in between.

Then, the upper and lower rolls (1,3) of the movable lower roll (2) is moved upward to the upper and lower rolls (1,2) in close contact with the lower roll (2) again to the lower But both the load cells 6 are moved to zero at the same time. However, when the upper and lower rolls 1 and 2 are brought into close contact, the contact surfaces of the upper and lower rolls 1 and 2 are not damaged.

As described above, when both load cells 6 become zero at the same time, an extensometer 7 is provided at both ends of the upper and lower rolls 1 and 2, and then the upper and lower rolls 1 and 2 are disposed. The lower roll 2 is moved downward to maintain the gap 9 of the target as desired, and the stretching value of the extensometer 7 installed at both ends of the upper and lower rolls 1 and 2 maintains the same value. Move it.

As described above, the gaps 9 of the upper and lower rolls 1 and 2 are adjusted, which means that the gaps 9 of the upper and lower rolls 1 and 2 are the same so as to reach from one end to the other end. That is, the resulting strip is to be able to produce a good quality product of the same thickness of the plate.

By using the roll gap measuring method of the twin roll strip caster of the present invention as described above, the gap between the upper roll and the lower roll can be quickly and easily measured in a short time during the casting of the twin roll roll and the gap between the upper roll and the lower roll can be adjusted constantly. There is an effect that can minimize the thickness variation of the plate.

In addition, the roll gap measuring method of the present invention has an effect that can easily and accurately adjust the roll gap, regardless of the operator even if not highly skilled.

Claims (2)

delete A load cell installation step of installing each load cell between both roll shafts and roll frames formed on the upper roll so as to constantly adjust a gap between upper and lower rolls when casting a two-win roll strip; A zero point setting step of moving the lower and lower rolls of the upper and lower rolls to the upper side to bring the upper and lower rolls into close contact with each other and then moving the lower rolls downward until both load cells become zero at the same time; An extensometer installation step of installing an extensometer at both ends of the upper / lower rolls when both load cells become zero at the same time; And When the extensometer is installed, the lower roll is moved downward in order to maintain the gap of the upper / lower roll as desired, and the extension / extension of the extensometer installed at both ends of the upper / lower roll keeps the same value. Roll gap measurement method of a two-roll roll caster comprising a lower roll gap adjustment step.

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