KR20120032865A

KR20120032865A - Apparatus for measuring elongation of skin pass mill

Info

Publication number: KR20120032865A
Application number: KR1020100094408A
Authority: KR
Inventors: 강기수; 김동일
Original assignee: 현대제철 주식회사
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2012-04-06

Abstract

The present invention relates to an apparatus for measuring elongation of a rough rolling mill to accurately measure elongation by measuring a change in length of the rolling plate at the front and rear ends of the rolling mill, and measuring a traveling length of the rolling steel sheet at the front end of the rolling mill in response to a trigger signal. A first laser length measuring unit; A second laser length measuring unit measuring a traveling length of the rolled steel sheet at a rear end of the rolling mill in response to the trigger signal; A trigger generator for simultaneously outputting the trigger signal to the first laser length measuring unit and the second laser length measuring unit; And a controller configured to control the trigger generator to output the trigger signal, and calculate an elongation rate using the measured values measured by the first laser length measuring unit and the second laser length measuring unit.

Description

Elongation measuring device of temper rolling mill {APPARATUS FOR MEASURING ELONGATION OF SKIN PASS MILL}

The present invention relates to a device for measuring elongation of a rough rolling mill, and more particularly, to a device for measuring elongation of a rough rolling mill so that elongation can be accurately measured by measuring a change in length of a rolling plate in front and rear ends of the rolling mill.

Skin Pass Mill (SPM) is a facility used in the temper rolling process to improve the mechanical properties of the produced rolled sheet, to give roughness on the product surface and to correct the shape of the plate.

The temper rolling process is an important process that influences the quality of the rolled steel sheet because it belongs to the final process in the rolling process, and the magnitude of yield stress, which is a mechanical property of the product, varies according to elongation.

Therefore, the elongation in the temper rolling process is an important factor that determines the quality of the rolled steel sheet and needs accurate measurement.

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

An object of the present invention is to provide an apparatus for measuring elongation of a rough rolling mill to accurately measure elongation through measuring a change in length of a rolling plate at front and rear ends of a rolling mill.

Elongation measuring apparatus of the temper rolling mill according to the present invention, the first laser length measuring unit for measuring the traveling length of the rolled steel sheet in front of the rolling mill in response to the trigger signal; A second laser length measuring unit measuring a traveling length of the rolled steel sheet at a rear end of the rolling mill in response to the trigger signal; A trigger generator for simultaneously outputting the trigger signal to the first laser length measuring unit and the second laser length measuring unit; And a controller configured to control the trigger generator to output the trigger signal, and calculate an elongation rate using the measured values measured by the first laser length measuring unit and the second laser length measuring unit.

In the present invention, the rolling reduction force of the rolling mill according to the elongation measured is characterized in that the real-time control.

As described above, the present invention improves the quality of the rolled steel sheet by accurately performing the elongation measurement by measuring the length change of the rolled plate at the front and rear ends of the rolling mill, and automatically improves the elongation, thereby improving productivity and real-time loss rate measurement. Through it can be used for real-time elongation control of the rolled steel sheet.

1 is a view for explaining the configuration of the elongation measuring device of the temper rolling mill according to an embodiment of the present invention.
Figure 2 is a flow chart for explaining the operation of the elongation measuring apparatus of the temper rolling mill according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to Examples. These embodiments are only for illustrating the present invention, and the scope of rights of the present invention is not limited by these embodiments.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a view for explaining the configuration of the elongation measuring device of the temper rolling mill according to an embodiment of the present invention.

Referring to FIG. 1, an elongation measuring apparatus of a temper mill according to an embodiment of the present invention may include a trigger generator 1, a controller 2, a first laser length measuring unit 3, and a second laser length measuring unit ( 4).

When the temper rolling process is started, the trigger generation unit 1 receives a trigger signal for measuring the length of progress of the rolled steel sheet 8 at the front and rear ends of the rolling mill 5 under the control of the control unit 2. 3) and the second laser length measuring unit 4 are simultaneously output.

The first laser length measuring unit 3 measures the traveling length L of the rolled steel sheet at the front end of the rolling mill 5 in response to the trigger signal input from the trigger generating unit 1.

The second laser length measuring unit 4 measures the traveling length L 'of the rolled steel sheet 8 at the rear end of the rolling mill 5 in response to the trigger signal input from the trigger generating unit 1.

The length (L, L ') of the rolled steel sheet 8 is measured that the traveling speed of the rolled steel sheet 8 at the rear end of the rolling mill 5 passing through the rolling mill 5 is faster than the rolled steel sheet 8 at the front end of the rolling mill. Measure using

That is, the traveling lengths L and L 'of the rolled steel sheet 8 are calculated by measuring the moving speed of the rolled steel sheet 8 at the front and rear ends of the rolling mill 5.

The control unit 2 controls the trigger generator 1 to simultaneously output the trigger signal, and the length of the rolled steel sheet L and the second laser in front of the rolling mill 5 measured from the first laser length measuring unit 3. The elongation is calculated using the rolling steel plate traveling length L 'of the rear end of the rolling mill 5 measured from the length measuring part 4.

The equation of the elongation calculation is calculated via "elongation = [L'-L] / L".

In addition, the control unit 2 performs the temper rolling by controlling the rolling force of the rolling mill 5 according to the elongation measured in real time.

Figure 2 is a flow chart for explaining the operation of the elongation measuring apparatus of the temper rolling mill according to an embodiment of the present invention.

1 and 2, when the temper rolling process starts, the rolled steel sheet 8 wound on the pay-off reel 6 enters the rolling mill 5 through the roll 9, and the rolled steel sheet 8 entered. ) Is wound around the tension reel (7) through a rough rolling process through the rolling mill (5).

The elongation measurement operation during the temper rolling process of the rolling mill 5 is as follows.

First, a trigger signal is simultaneously output to the first laser length measuring unit 3 provided at the front end of the rolling mill 5 and the second laser length measuring unit 4 provided at the rear end of the rolling mill 5 (S1).

Then, the first leisure length measuring unit 3 measures the traveling distance L of the rolled steel sheet 8 at the front end of the rolling mill 5 in response to the trigger signal, and the second laser length measuring unit 4 triggers the trigger. In response to the signal, the traveling length L 'of the rolled steel sheet 8 is measured at the rear end of the rolling mill 5 (S2).

Here, the moving distance L of the rolled steel sheet 8 measured at the front end of the rolling mill 5 and the running length L 'of the rolled steel sheet 8 at the rear end of the rolling mill 5 were calculated by the elongation calculation formula "Elongation = Elongation is calculated by substituting [L'-L] / L "(S3).

Then, by using the calculated elongation to control the rolling force of the rolling mill to perform the temper rolling (S4).

As described above, the present invention improves the quality of the rolled steel sheet by accurately measuring the elongation rate by measuring the length of the rolled plate at the front and rear ends of the rolling mill, and automatically improves the elongation rate, thereby improving productivity. Can be used for real-time elongation control.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1: Trigger generating unit 2: Control unit
3: first laser length measuring unit 4: second laser length measuring unit
5: rolling mill 6: pay-off reel
7: tension reel 8: rolled steel sheet
9: roll

Claims

A first laser length measuring unit measuring a traveling length of the rolled steel sheet in front of the rolling mill in response to a trigger signal;
A second laser length measuring unit measuring a traveling length of the rolled steel sheet at a rear end of the rolling mill in response to the trigger signal;
A trigger generator for simultaneously outputting the trigger signal to the first laser length measuring unit and the second laser length measuring unit; And
And a controller configured to control the trigger generator to output the trigger signal, and calculate an elongation rate using the measured values measured by the first laser length measuring unit and the second laser length measuring unit. Elongation measuring device.

The apparatus of claim 1, wherein the control unit
Elongation measuring apparatus of the temper rolling mill, characterized in that for controlling the rolling force of the rolling mill in real time according to the elongation to be measured.