KR101193831B1

KR101193831B1 - Apparatus for measuring bar steel and method thereof

Info

Publication number: KR101193831B1
Application number: KR20100073150A
Authority: KR
Inventors: 정해근
Original assignee: 현대제철 주식회사
Priority date: 2010-07-29
Filing date: 2010-07-29
Publication date: 2012-10-23
Also published as: KR20120011398A

Abstract

The present invention includes a roller table in which a bar is located thereon, and a first motor for moving the bar; A bar detection sensor installed at one side of the roller table to detect an entry and exit of a bar and generate an entry signal and an exit signal; A second motor having the same reduction ratio as the first motor and installed indoors; A pulse generator installed indoors for generating a pulse signal; And a control unit for measuring the length of the bar through the entry signal, the advance signal, and the pulse signal.

Description

Bar length measuring apparatus and its method {APPARATUS FOR MEASURING BAR STEEL AND METHOD THEREOF}

The present invention relates to a steel bar length measuring apparatus and method having excellent durability and a low error rate.

In general, in order to produce a rolled material in a steel mill, a rolling process is performed, and the rolling process is performed by inserting slabs, blooms, billets, etc., produced in a continuous casting process, between two rotating rolls to form a thin and long shape. will be.

A rolling mill is a device for forming a plate material, a bar material or the like through plastic deformation of a material while passing the material between rotating rolls at room temperature or high temperature. A conveyance guide is provided between the rolling mill and the rolling mill to feed the rolling mill to the rolling mill in the next step.

When the reinforcing bar is produced in the rolling mill, reinforcing bars are continuously produced, which are cut to a predetermined length and loaded and stored. In order to cut the reinforcement to a certain length, a cutter having a cutting blade (SHEAR MACHINE) is used.

An object of the present invention is to propose an apparatus and a method for measuring the length of a steel bar in which the error rate is small and heat damage does not occur.

In order to solve the above problems, the method of measuring the length of the bar according to an embodiment of the present invention, the entry and exit of the bar through the bar detection sensor provided on one side of the roller table including a first motor for moving the bar Generating an entry signal and an exit signal; Installing a second motor having the same rotational ratio as the first motor indoors; And measuring the length of the bar by performing pulse counting through a pulse generator that measures an operating time of a second motor installed in the room based on the entry signal and the exit signal.

The bar detection sensor may be a photosensor installed at one end of the roller table.

The method of measuring the length of the steel bar may further include driving the first motor and the second motor in the same manner.

The method of measuring the length of the steel bar may further include connecting the first motor and the second motor in parallel from the same power source.

Another embodiment of the present invention, the bar length measuring device includes a roller table in which the bar is positioned on top of the bar table, and a first motor for moving the bar; A bar detection sensor installed at one side of the roller table to detect an entry and exit of a bar and generate an entry signal and an exit signal; A second motor having the same reduction ratio as the first motor and installed indoors; A pulse generator installed in the room and configured to generate a pulse signal by measuring an operating time of the second motor; And a controller electrically connected to the first motor, the second motor, and the pulse generator to measure a length of the steel bar through the entrance signal, the exit signal, and the pulse signal.

The bar length measuring device may further include a circuit breaker for driving the first motor and the second motor in the same manner.

The first motor and the second motor may be connected in parallel from the same power source.

According to one embodiment of the present invention having the above-described configuration, since the pulse generator (PG) for measuring the bar length is installed in the room, it is possible to prevent the thermal damage and the measurement error due to heat.

1 is a conceptual diagram for explaining a method for measuring the length of a bar that is an embodiment of the present invention.
Figure 2 is a flow chart illustrating a method for measuring the length of the bar is an embodiment of the present invention.

Hereinafter, a bar length measuring apparatus and a method thereof according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, different embodiments are given the same or similar reference numerals for the same or similar configurations, and the description is replaced with the first description.

1 is a conceptual diagram illustrating a bar length measuring device according to an embodiment of the present invention.

As shown, the bar length measuring device according to an embodiment of the present invention, the bar (P) is installed on the roller table 100, the roller table is located on one side of the upper part is detected by entering and exiting the bar enters It may include a bar detection sensor 200 for generating a signal and an exit signal, and a measurement unit 300 installed in the room to measure the bar length based on the entry and exit signals from the bar detection sensor 200. .

The roller table 100 may include a first motor as a member for moving the bar P toward the heating furnace.

The bar detecting sensor 200 is a component for generating an entry and exit signal, which is a signal for measuring the length of the bar P, and a photo sensor may be used.

The measuring unit 300 installed indoors has a second generator 310 having the same rotational ratio as the first motor, a pulse generator 320 for generating a pulse signal for measuring an operating time of the second motor 310, and the bar. It may include a communication unit 330 for receiving the entry and exit signals from the sensor and the control unit 340 for measuring the length of the bar through the entry signal, the entry signal, the pulse signal. Although not shown, a circuit breaker for driving the first motor and the second motor in the same manner may be further included.

In order for the first motor and the second motor 310 to rotate in the same manner, the first motor and the second motor 310 may be connected in parallel from the same power source. The first motor, the second motor 310, and the pulse generator 9320 will be appreciated by anyone who is electrically connected to each other by the control unit 340.

Hereinafter, a method for measuring the length of a bar through a bar length measuring device according to an embodiment of the present invention having the above-described configuration will be described in detail with reference to the flowchart of FIG. 2.

Figure 2 is a flow chart for explaining a method for measuring the length of the bar, which is an embodiment of the present invention. First, as shown, the bar detection sensor is installed on one end of the roller table installed in front of the heating furnace (S1). In this case, the bar detection sensor may be a photosensor. The bar detection sensor generates an entrance signal and an exit signal for the bar entering through the roller table having the first motor (S2). On the other hand, a second motor having the same rotation ratio as the first motor is installed indoors (S3). The room may be an electric room. Meanwhile, a pulse generator for detecting an operating time of the second motor may be installed together in the electric room (S4). Here, the first motor and the second motor may be driven in the same manner, and the first motor and the second motor may be connected in parallel from the same power source. Then, the length of the bar is measured by the pulse signal, the entry and exit signals for the second motor (S5).

According to one embodiment of the present invention having the above-described configuration, since the rod length is sensed by using a twin motor (second motor) installed in the room instead of the roller table, maintenance is simplified, and thermal damage and heat Occurrence of the error can be prevented in advance.

Such a bar length measuring device and method thereof are not limited to the configuration and operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: roller table
200: bar detection sensor
300: measuring unit

Claims

Generating an entrance signal and an exit signal by detecting entrance and exit of the bar through a bar detection sensor installed at one side of a roller table including a first motor for moving the bar;
Installing a second motor having the same rotational ratio as the first motor indoors; And
And measuring the length of the bar by performing pulse counting through a pulse generator that measures an operating time for a second motor installed in the room based on the entry signal and the exit signal.

The method of claim 1,
And the bar detecting sensor is a photosensor installed at one end of the roller table.

The method of claim 1,
And driving the first motor and the second motor in the same manner.

The method of claim 1,
And the first motor and the second motor are connected in parallel from the same power source.

A roller table having a bar located thereon, a first motor for moving the bar;
A bar detection sensor installed at one side of the roller table to detect an entry and exit of a bar and generate an entry signal and an exit signal;
A second motor having the same rotation ratio as the first motor and installed indoors;
A pulse generator installed in the room and configured to generate a pulse signal by measuring an operating time of the second motor; And
And a control unit electrically connected to the first motor, the second motor, and the pulse generator to measure a length of the bar through the entry signal, the advance signal, and the pulse signal.

The method of claim 5, wherein
The bar detection sensor is a bar length measuring device, which is a photosensor installed at one end of the roller table.

The method of claim 5, wherein
The bar length measuring device further comprising a circuit breaker for driving the first motor and the second motor in the same manner.

The method of claim 5, wherein
The bar length measuring device of which the first motor and the second motor are connected in parallel from the same power source.