KR20020050348A - The Account Method and Controler of Pass Line using of an Estimated Model of Thickness - Google Patents

Abstract

PURPOSE: A method for calculating an appropriate elevation of a pass line after pressing using a thickness estimation model equation of a material to be processed according to widthwise rolling amounts and an apparatus in which the elevation is automatically adjusted by an adjusted value calculated by the method are provided. CONSTITUTION: The apparatus for adjusting a pass line using a thickness estimation model equation and an apparatus for adjusting the same is characterized in that some of table rolls of pinch rolls composing table rolls(1) are arranged on a frame(10) so that some of the table rolls are interlocked by ascending and descending operations of the frame(10), a cam contact part is installed at both sides of the lower part of the other side of the frame(10) that is vertically moved by a hinge shaft coupled to the lower part of one side of the frame(10), an oval cam(6) contacts the cam contact part, a gear(7) is connected to the cam(6), a shaft(9) is connected to the cam(6) and the gear(7) by a shaft of a motor(8) driven by a PLC(programmable logic controller) signal(11) into which a pass line adjusted value is inputted, and five rolls(2-2 to 2-6) starting from a first roll(2-1) of outlet pinch rolls initially receiving a widthwise rolled material are sequentially connected onto the table roll that is arranged on the frame(10).

Description

The Account Method and Controller of Pass Line using of an Estimated Model of Thickness}

The present invention relates to a device for adjusting the lifting and lowering of the pass line for conveying the slab in the width direction in the rolling process and a method for calculating the adjustment value of the lifting, in detail the width reduction by the width of the material By using the predictive model equation of the thickness change according to the quantity, the adjustment value calculation method and the adjustment value which can automatically adjust the raising and lowering height of the pass line in accordance with the thickness change at all times after pressing the material A passline adjuster operating on an adjustment value.

Referring to the process of rolling the width of the slab in the rolling process of a general steelmaking facility, as shown in FIG. 7, the material 5 passing between the side guides 4 on a pass line is a pinched pinch roll 3. -5) the buckling is prevented by the entry anti-buckling roll (3-4) and the exit buckling prevention roll (3-5), and at the same time, the two presses arranged on both sides in the width direction of the material After width rolling while passing between the dies 3-2, the table roll 1 connected with the press die 3-2 receives the rolled material and transfers it to the next process.

However, when the width of the material is rolled in this way, the width of the material decreases, but the thickness increases as the width decreases, so that it is impossible to work with a conventional pass line. That is, the thickness of the material naturally increases as the width of the material is increased in rolling amount, and the increased thickness of the material hangs on the table roll, thereby making it impossible to advance the material.

Therefore, in the related art, not only the rolling device is used by limiting the width rolling amount of the material so that the width change of the material to be rolled is not too large. Since the table roll to which the old material is transferred is fixed, there is a problem that the table roll hits the raw material and causes equipment damage.

The present invention has been made to solve the problems as described above, by using the thickness change prediction model of the material according to the width of the roll width by width of the material in order to increase the width rolling amount and to enable stable operation, pass after pressing It is an object of the present invention to provide a method for calculating an appropriate height of a line and an apparatus for automatically adjusting the height of a pass line by the adjustment value calculated by the calculation method.

1 is a plan view (a) and a side view (b) of a pass line of a press installation according to the present invention;

2 is a perspective view of FIG.

3 is an operating state diagram of the frame lifting mechanism according to the present invention,

4 is a connection state diagram of a gear and a cam driven by a motor;

5 is a flow diagram (Flow Diagram) according to the present invention,

6 is a flow chart of a process of adjusting pathlines in accordance with the present invention;

7 is a plan view of a pass line of a conventional press installation.

(Explanation of reference numerals)

1 ... table rolls of conventional passlines,

2 ... the table roll of the passline according to the present invention,

2-1 ... Rear first roll of exit pinch roll,

2-2.Rear second roll of exit pinch roll (reference roll for passline adjustment),

2-3.Rear third roll of exit pinch roll,

2-4 to 2-6 ... the fourth to sixth rolls on the back of the exit pinch roll,

3 ... the press fixture body,

3-1.Exit Pinch Roll,

3-2 ... Press Die,

3-3 ... exit buckling prevention roll,

3-4 ... entrance buckling prevention roll,

3-5 ... inside pinch roll,

4 ... Side Guide, 5 ... Slab,

6 ... Cam, 7 ... Gear,

8 ... motor, 9 ... shaft,

10 ... frame, 11 ... PLC signal.

The present invention calculates the height of the pass line of the back table roll of the press equipment by using a model prediction formula for the thickness change of the material according to the width reduction amount for each width of the material, the height of the pass line by the calculated value As a device that can automatically adjust, it will be described in detail below in accordance with the accompanying drawings.

1 and 2, a part of the pinch roll (table roll according to the present invention) 2 constituting the table roll 1 for receiving the rolled material and transferring it to the next step, as shown in FIGS. Is disposed on the frame 10, and is configured to be interlocked with the lifting and lowering operation of the frame 10, and the other configuration is the same as the pass line of the conventional press equipment.

And, as shown in Figures 3 and 4, the configuration for raising and lowering the frame 10, both sides of the lower side of the other side of the frame 10 that flows up and down by the hinge shaft 13 coupled to the lower end of one side. Cam contact portion 12 is installed in the, the cam contact portion 12 is in contact with the oval cam 6, the cam 6 is connected to the gear (7), the cam 6 and the gear The shaft 9 which connects (7) is comprised by the axis | shaft of the motor 8 which is driven by the PLC signal machine 11. As shown in FIG.

In addition, a table roll 2 is disposed on the frame 10 as described above, starting from the first roll 2-1 of the exit pinch roll to which the rolled material is first handed over to the table roll 2. Five rolls (2-2), (2-3), (2-4), (2-5), and (2-6) are sequentially connected.

Therefore, the gear 7 is connected to the gear 7 by connecting the shaft 9 connected to the shaft of the motor 8 to the gear 7, and the cam 6 for converting the rotational movement of the gear 7 into linear motion is the gear 7. The frame 10 and the table roll 2 are constituted by one set in accordance with the operation of the cam 6 which is operated together with the rotation of the gear 7 by the driving of the motor 8 by It is supposed to work.

Then, the frame 10 on the roll 2-6 side away from the exit pinch roll 3-1 is fixed to maintain the same path line as the conventional table roll 1, and the exit pinch roll ( The frame 10 on the roll 2-1 side close to 3-1) is configured to be lifted and lowered by the motor 8.

Next, the operation of the pass line adjusting device according to the present invention will be described.

The step of adjusting the lifting and lowering of the pass line by calculating the press-lifting adjustment value of the pass line adjusted by the thickness change of the material according to the width reduction amount for each width of the material, and step by step showing the operation of adjusting the lifting and lowering of the pass line by the obtained adjustment value. It is as shown in Figure 1, and when calculating the model prediction equation for the thickness change of the material after the press is as shown in equations (1-1) to (1-5) of Table 1.

Material width before press Model formula for predicting material thickness change after pressing 1000 or less H2 = 245.91 * ( ^Δw ) ^0.1254 ..... (1-1) 1001 to 1100 H2 = 247.51 * (△ w) ^0.0884 ..... (1-2) 1101-1180 H2 = 247.82 * ( ^Δw ) ^0.0816 ..... (1-3) 1181-1280 H2 = 248.47 * (△ w) ^0.0703 ..... (1-3) 1281- H2 = 248.98 * (△ w) ^0.0644 ..... (1-4)

Δw: Width reduction amount of material (slab)

H2: material thickness after pressing

First, the information on the thickness (H1), width (w) and width reduction (Δw) of the slab (working material) to be worked on is received in the above calculation formula, where the material thickness H1 is fixed to 250 mm. -After calculating the material thickness (H2) after pressing in the thickness prediction model equation according to the width reduction amount according to the width reduction of each material of the formulas (1-1) to (1-5) of Table 1, 50 of the thickness difference before and after pressing A passline adjustment value A which subtracts% from the conventional passline value is determined. This pass line adjustment value A is represented by the following formula (2).

Pass line adjustment value (A) = conventional pass line-(ΔH / 2) ... (2)

Here, the criterion for the pass line adjustment value (A): Table Roll

ΔH = H2-H1 = H2-250

The reason for applying 1/2 of the thickness difference (ΔH) before and after pressing in Equation (2) is that the material thickness increases to the upper and lower part in the thickness direction, so only the amount of lower part is calculated to adjust the pass line. This is because

Also, the pass line adjustment value is based on the second roll 2-2 of the roll close to the cam 6. The first roll (2-1), even if the thickness prediction model formula is accurate, there is no consideration of the error, so when the material enters, the impact may continue to impose on the installation.

In addition, when the roll on the third or more rolls 2-3 is used as a reference, the pass line adjustment value A becomes large, so that unnecessary motor operation and mechanical operation increase. Therefore, it is most preferable to refer to the second roll 2-2.

The following is a step of adjusting the pass line after receiving the value of Equation (2), and receives the path line adjustment value (A) of Equation (2) from the PLC 11 to drive the motor 8 to the frame 10. And the table 2 are connected to the gear 7 by the shaft 9 so that the table 2 descends, and transmits power, and in one set according to the operation of the cam 6 which converts the rotational movement of the gear 7 into linear motion. The frame 10 and the tail roll 2 are lowered by the indicated pathline adjustment value A so that the pathline on the back of the press equipment can be automatically adjusted.

FIG. 6 is a flowchart illustrating a method of adjusting a pathline by applying the calculated adjustment value after obtaining the pathline adjustment value by the width of the workpiece, and from the start to completion of the pathline adjustment. The process is clearly illustrated.

According to the passline calculation method and apparatus utilizing the thickness prediction model formula of the present invention made up of the above objects and configurations, it is possible to predict the thickness change of the material after pressing that the thickness after the width rolling of the material is increased so that no further progression is possible on the table. By automatically adjusting the height of the pass line according to the formula, the productivity and work efficiency can be improved by increasing the width rolling width.

Claims (2)

The thickness (H1) of the material is fixed at 250 mm, and when the width of the material is 1000 or less, 245.91 * (Δw) 0.1254, 1001-1100, 247.51 * (Δw) 0.0884, 1101-1180, 247.82 * (Δw) 0.0816, 1181 to 1280, 248.47 * (Δw) 0.0703, 1281 or more, and after calculating the material thickness (H2) after width rolling using the formula of 248.98 * (Δw) 0.0644, H2-H1 The thickness change (ΔH) determined by the above method is applied to a conventional passline- (ΔH / 2) equation, and the pathline adjustment value (A) based on the second roll (2-2) of the exit pinch roll is determined. Pass line calculation method using the thickness prediction model formula, characterized in that obtaining. A part of the table roll 2 of the pinch roll constituting the table roll 1 is disposed on the frame 10 to be interlocked with the lifting operation of the frame 10, but coupled to the lower end of one side. Cam contact portions 12 are provided on both sides of the lower end of the other side of the frame 10 that flows up and down by the hinge shaft 13, and the cam contact portions 12 are in contact with the oval cam 6. A gear 7 is connected to the cam 6, and the shaft 9 connecting the cam 6 and the gear 7 is driven by a PLC signal 11 in which a pass line adjustment value A is input. And the first roll 2-1 of the exit pinch roll, which first receives the rolled material to the table roll 2 arranged on the frame 10, while being composed of the shaft of the motor 8, Five rolls (2-2), (2-3), (2-4), (2-5), (2-6) is a model of the thickness prediction model characterized in that is connected in sequence A pass-line adjustment devices.