KR0121187Y1 - Calibration gauge for reduction roll gap - Google Patents

Abstract

The present invention relates to a pressure reduction device for maintaining a constant casting pressure reduction during the bromyeon cycle, the height corresponding to the set value of the rolling roll gap to reduce the gap between the rolling rolls to the set value (H) At the same time, the block gauge 1 having a width (W) corresponding to one third or more of the length of the down roll can be reciprocated by an external force to accommodate horizontal defects of the down roll. Consists of a structure connected to the head portion of the dummy bar 100, to be formed at the same height as the set value of the roll roll gap, and at the same time to correct the roll roll gap by using a block gauge formed in a width of more than one third of the roll roll length. Therefore, not only the working time for the calibration of the rolling roll gap is shortened, but also the correctness can be corrected even when the flatness of the rolling roll is bad.

Description

Low Pressure Roll Cap Calibration Gauge

The present invention relates to a pressure reduction device for maintaining the cast slab load uniformly during a bromyeon cycle, and more particularly, to a pressure drop gap calibration gauge capable of accurately and quickly correcting a pressure drop roll gap of a pressure reduction device. .

In general, a soft reduction system is a device for stepping down by using a plurality of pressure reduction rolls in a non-solidified section so as to maintain a constant reduction in the amount of hot cast cast by the machine. The low pressure device not only reduces the internal segregation of the cast, but also suppresses the internal crack.

Therefore, the low pressure device is limited to high value-added products due to its work characteristics. In addition, the pressure reduction device must precisely maintain the rolling roll gap so as to apply an accurate rolling pattern for each type of cast steel.

In other words, the actual rolling error of the pressure reduction device should be maintained at a minimum value of ± 0.3mm, and the gap of the pressure reduction roll that was first measured and set by the surface wear of the rolling roll, the bearing wear of the roll shaft, etc. may be frequently changed due to the characteristics of the equipment or work. As the precision of cast iron load decreases while changing, it should be periodically measured and calibrated.

The conventional measuring gauge for measuring the gap of the rolling roll is a T-shaped gauge provided with a measuring rod made of the set standard value of the rolling roll cap at the tip of the handle, and is a portable pin type gauge.

In the method of use, the operator inserts a measuring gauge between each pressing roll and visually measures the insertion state of the measuring gauge, so that the pressing roll and the measuring rod are inserted at right angles to each other.

If the operator determines that the measuring gauge is not properly inserted between the rolling rolls or the gap is too wide, the operator of the PLC loader is contacted by a radio to calibrate.

By the way, the measuring method described above requires the operator to approach each of the five step down rolls, which are inconveniently accessible, to communicate with the driver of the PLC loader to calibrate the measurement results, and to measure and calibrate one roll down roll for about 10 minutes. Since it takes longer, it takes about 1 hour or more to calibrate the entire roll down roll, causing a problem in the operation.

Accordingly, the present invention has been devised to solve the problems described above, and provides a light pressure roll cap calibration gauge made of a block type (block type) to be used in combination with the dummy bar to move a narrow space. Its purpose is to.

1 is a perspective view schematically showing a gauge for calibrating down roll gap according to the present invention.

Figure 2 is a side cross-sectional view showing a state in which the pressure drop roll gap correction gauge coupled to the dummy bar according to the present invention.

Figure 3 is a state diagram of use of the gauge for light pressure roll gap correction according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Block gauge 2: Connection part

H: Thickness equal to the set value of the pressure roll cap

W: Thickness more than three quarters of the length of the rolling roll

Hereinafter, with reference to the accompanying drawings illustrating an embodiment according to the present invention in detail as follows.

1 is a perspective view schematically showing a gauge for low pressure roll gap correction according to the present invention, Figure 2 is a side cross-sectional view showing a state in which the pressure gauge for low roll gap correction according to the present invention is coupled to the dummy bar, 3 is a state diagram of the gauge for calibrating the pressure drop roll gap according to the present invention, as shown in these figures, corresponding to the set value of the pressure drop roll gap so that accurate calibration is made in the process of reducing the gap between the pressure drop rolls to a predetermined value. Reciprocating the block gauge 1 formed with the width W corresponding to at least one-third of the length of the rolling roll to receive the flatness of the rolling roll and maintaining the horizontal state by accommodating the badness of the flat roll. It is structured to be connected to the engaging portion 101 of the dummy bar 100 to operate.

Here, the block gauge 1 is made of a special steel having excellent wear resistance, and is hardened (H _R C 58 ± 5) to have a certain hardness on the upper and lower surfaces which are in direct contact with the rolling roll.

In addition, the thickness (H) of the block gauge (1) is formed at the same height as the set value of the rolling roll gap in order to precisely maintain the rolling reduction amount of the hot cast cast to a certain size through the playing machine, the width (W) In order to minimize the cause of the measurement error caused by the poor flatness of the roll down roll, the roll roll has a structure formed at least one third of the length of the down roll.

In addition, the body of the block gauge (1) has a structure in which the connecting portion (2) having a hook shape is formed integrally so as to be disassembled or coupled with the dummy bar (100) along one side.

Of course, one side of the dummy bar 100 has a structure formed integrally with the engaging portion 101 to be coupled to the connecting portion (2).

Hereinafter, with reference to the accompanying drawings illustrating the operation according to the present invention in detail as follows.

First, the head of the dummy bar 100 is removed in a state in which all of the rolling rolls in which the error is generated are removed, and the connection part of the block gauge 1 is connected to the engaging portion 101 of the dummy bar 100 from which the head part is removed. Insert 2) to join.

In addition, a plurality of pressure reduction rolls 201 to 20 which constitute a pressure reduction device 200 may be configured as a pressure reduction roll calibration gauge in which the engaging portion 101 of the dummy bar 100 and the connection portion 2 of the block gauge 1 are coupled to each other. 204).

At this time, when the block gauge 1 is positioned at the center of the first push down rolls 201 and 201 of the low pressure lowering device, the measurer needs to gradually reduce the push down roll while communicating with the driver of the PCL loader using the radio.

In this state, the block gauge 1 is stopped between the first rolls 201 and 201, and the driver of the PCL loader communicates with the measuring device while gradually reducing the gap of the first rolls 201 and 201. To complete.

When the calibration of the first roll down rolls 201 and 201 is completed through the above-described process, the dummy bar 100 is moved inward of the light pressure lowering device 200.

That is, while the block gauge 1 connected to the locking portion 101 of the dummy bar 100 enters between the second pressing rolls 202 and 202, measurement and calibration work is performed.

Of course, while slowly entering the block gauge 1 between the third push down rolls 203 and 203 and the fourth push down rolls 204 and 204, the measurement and calibration operations are repeated through the same process as described above.

Of course, after the measurement and calibration of the pressing roll is completed, the dummy bar 100 and the block gauge 1 are disassembled, and when the head is coupled to the engaging portion 101 of the dummy bar 100, all the calibration work is performed. It's done.

As described above, according to the low pressure roll gap calibration gauge according to the present invention, the pressure reduction roll is formed by using a block gauge formed at the same height as the set value of the pressure reduction roll gap and formed at a width equal to or greater than one third the length of the pressure reduction roll gap. Since the gap is corrected, the work time for the calibration of the rolling roll gap is not only shortened, but also when the flatness of the rolling roll is bad, it is possible to accurately correct the gap.

Claims (1)

In the process of reducing the gap between the rolling rolls to the set value, the height (H) corresponding to the setting value of the rolling roll gap is formed so that the correct calibration can be performed. For low pressure roll gap correction, characterized in that the block gauge (1) formed in the width (W) corresponding to more than one third of the structure is connected to the head of the dummy bar 100 reciprocating by an external force gauge.