KR960005215B1 - Device of automatic dividing with cold rolling annealing process - Google Patents

Abstract

The dividing device includes annealing furnace(13), input side(12) and output side(14) compensating parts, welding equipment(11), pay off reel(10), tension reel(17), a computer processor, length measuring sensor(18) established at tension reel(17), welding hole sensor(15) arranged between cutter(16) and output compensating part(14), a programming language controller working in weld zone cutting mode and length cutting mode, and cutter(16) operating under the programming language controller. The device can actively cope with the needs of various kinds of users and prevent length errors of products following elongation of base materials during dividing process.

Description

Automatic splitting device of cold rolling annealing process

1 is a schematic illustration of the sensor position of the cold annealing process line according to the present invention.

Figure 2 is a block diagram showing the automatic product splitting apparatus of the cold rolling annealing process according to the present invention.

3 is a flowchart corresponding to an automatic product splitting apparatus for explaining the present invention.

* Explanation of symbols for main parts of the drawings

10: payoff reel 11: welder

12: compression compensation unit 13: annealing furnace

14: exit compensation part 15: welding hole sensor

16: cutter 17: dent reel

18: Length measuring sensor 19: PLC (Programmalbe Logic Controller)

12: processor computer

The present invention relates to a product automatic splitting device of a cold rolling annealing process that can prevent the product length error due to the stretching of the material length in the product splitting process after the cold rolling annealing process and can actively respond to the demands of various demands.

In general, the cold rolled material coil is passed through the annealing line included in the heating furnace to give the workability of the material.

1 is a schematic diagram of an annealing line to be applied to the present invention, which is the same as the standard annealing line except for the respective sensors 15 and 18. Based on this, the cold rolled material coiled to the payoff reel 10 coming through compression is welded by the welder 11 for continuous operation and passes through the annealing furnace 13. At this time, in order to keep the speed of the material passing through the annealing furnace 13 constant, the side compensation part 12 for compensating the material movement speed delay generated during welding is provided between the annealing furnace 13 and the welding machine 11. It is prepared. The annealing furnace 13 is heated up to 950 ° C. and is given tension for smooth flow of the material.

The raw material that has passed through the annealing furnace 13 is divided into a predetermined length by the cutter 16 of the output, in which the exit between the cutter 16 and the annealing furnace 13 for smooth operation during the operation of the cutter for product division. Compensation unit 14 is installed.

On the other hand, the cold-rolled annealing line works continuously unless special obstacles occur, so that the material input at compression and the product splitting at the exit side occur continuously.

In the processing operation of the whole device, first, the processor computer receives the material weight, the upper and lower limits of the order packing stage, and whether the welding point is allowed in the product as the material and the order condition from the host controller at the same time as the material input and passes the annealing process. It predicts the stretching length (material change when passing through an annealing furnace and material change when working with temper rolling mill) according to various changes of material and finally sets the product division length and cutting mode (length or welding mode) in the lower PLC. By controlling the division.

At this time, the calculation of the length of the object to be divided is carried out for the second time, and the first calculation takes into account the material information when receiving the indication data from the host controller, and calculates the length and number of divisions based on the weight of the pavement. The second calculation is the actual split information, and the actual split length of the corresponding product is calculated and set in the PLC in consideration of the cutting length performance of the previous product and the length increased during the annealing process.

In addition, the length to be cut is calculated by the following formula (1) as the sum of the length calculated from the weight of the material and the length increased in the annealing process.

Length to be cut (m) = weight / (thickness x width x specific gravity) + △ L ............... ......(One)

(△ L: Increased length of material during annealing)

ΔL is the variation in the length of material generated during the annealing process in the actual industry, which can be analyzed and predicted and applied to the following two factors.

The first factor is the elongation that occurs when passing through the annealing furnace. The change of material during annealing within the proper annealing temperature after cold working can be represented by internal stress control, softening, recrystallization, and crystal growth.

This series of changes occurs in continuous annealing, and the physical material is expected to change due to factors such as the tension of the strip during travel, nonuniformity of the annealing temperature (especially in the longitudinal direction), and line speed.

The stretching in the annealing furnace occurs when the tension is applied to the yield strength of the material or more, and the higher the temperature in the annealing furnace, the higher the tension, the more severe the relationship has a functional relationship as shown in the following equation (2). .

△ L1α × f (Temp, Tens) ......................... .................(2)

Here, α: steel coefficient, Temp: annealing furnace temperature Tens: tension f: function ΔL1 The amount of stretching of the material in the annealing furnace.

In Equation (2), the steel coefficient α is made up of the material input steel grade classification (8 divisions), and is used by regression analysis of a large amount of unemployed business performance value (length calculation value).

The second factor is stretching in the rough mill.

In order to improve the mechanical properties of the finished material after annealing, drawing is performed under cold pressure of 0.3-3.0%. The use effect includes plate surface roughness adjustment, shape adjustment, yield point elongation prevention, etc. However, the amount of change in material length (increase) involved in this process is changed according to the following elongation. Cause

......................... 3)

L1: cold-charge length

L2: Length after cold pressing

ΔL2: EL × Li / 100

△ L2: Material drawing amount by using under cold pressure

Therefore, the total length in the annealing process is obtained by the following equation (4).

△ L = △ L1 (calculation in annealing furnace) + △ L2 (stretching under cold pressure) ...... (4)

On the other hand, the conventional product division method is classified into the following several by the process classification in the annealing process.

Firstly, the annealing final product is the core process of product division, and the process is divided according to the acceptance of welding point among the requirements of the demand price. When the welding point is allowed, the length of the splitting object covers the entire length of the injected material.

On the other hand, the margins ~% displayed in the packaging range classification is to be secured as a margin in the division length calculation process in order to prevent the excess or less of the order stage that may occur as a result of product division.

Second, there are secondary process materials and ECL materials.

The secondary process material is a material that needs to be treated separately in the correction process according to the special demand of the demand price. In the annealing process, only the process of dividing the input material into the input material is required.

ECL (ELECTROLYTIC CLEANING LINE) material also passes through the granulation of the annealing process and divides the input material as it is.

In this way, the number of products and the product weight (product length) derived through the product division target length calculation logic are converted to the cutting target length and the cutting mode in the lower PLC and set for each product.

However, in the conventional product division, in order to calculate the product length, the worker calculates the product length by looking at the material weight and the demanded product weight, calculates the number of products, and substitutes the material length. There was a problem that errors occur frequently.

In addition, the length of the manually calculated product in the process of cutting out the outgoing product is operated by a cutter by referring to the manual input using the PLC screen or the length wound on the tension reel displayed on the pitting. There was an inevitable problem.

The present invention has been made to solve the above problems.

Accordingly, an object of the present invention is to automatically divide the length of the final product produced in the annealing process in real time processing according to the demand of the demand price, thereby greatly reducing the on-site workload according to the product division to improve the work capacity, process By accurately predicting and applying material changes in phases, it is possible to suppress unnecessary scraps as much as possible to improve order acceptance, and finally to provide an automatic splitting device for cold rolling annealing processes that can secure ingot productivity and product quality.

As a technical means for achieving the above object, the apparatus of the present invention is an automatic division of the product of annealing line equipment including an annealing furnace, an entrance and exit compensation unit and a welding machine, a payoff reel and tension reel, and a processor computer. An apparatus, comprising: a length measuring sensor mounted on the tension reel to measure a length of a product; A welding hall sensor for detecting a presence of a welding hole provided between the cutter and the exit compensation part; According to the cutting control data of the processor computer, the welding score by the welding hole sensor is checked, and if this welding score corresponds to the welding point allowable data value, commanding a decrease in exit speed and cutting of the product, and then passing the number of passes before welding. Weld part cutting mode to be set to "0" and the length measurement value by the length measuring sensor are checked, and this length measurement value is commanded to decrease the exiting speed corresponding to the set length data value and to cut the product, and then to measure the measurement length value. PLC operating in length cutting mode for setting the value to "0"; And it characterized in that it comprises a cutter for cutting the product according to the command of the PLC.

Hereinafter, the present description will be described with reference to the accompanying drawings.

FIG. 1 shows that the welding hole sensor 15 and the measuring sensor 18 are provided at the exit side and the tension reel, respectively, in order to achieve the present invention.

Referring to FIG. 1, the welding hole sensor 15 is a sensor that detects the presence or absence of a hole to be displayed after welding a material as the welding machine 12 for a continuous process by a photo sensing method, and the length measuring sensor 18 is a tensioner. According to the rotation speed of the reel 17, the rotating plate having the slits is registered and rotated, and then the light passing through the slits on the rotating plate is detected, and the sensor measures the cutting length.

2 is a block diagram of an annealing line control device for implementing the present invention.

As shown in FIG. 2, the PLC 19 including the device controller, the speed controller, and the length change length is configured to input control data (cutting length, cutting mode, allowable weld number) from the processor computer 20, In addition, the processor computer 20 is configured to output the cut product length record and the cutting completion signal.

In addition, the PLC 19 is configured to transmit the operation instruction signal to the cutter 16 and to receive the cutting completion signal from the cutter 16.

In addition, the PLC 19 is configured to be provided with the sensing signal of the welding hole detection sensor 15 and the length measuring sensor 18.

As described above, the product cutting process according to the configuration of the annealing control apparatus will be described with reference to FIGS. 2 and 3.

First, when the cutting control data of the product cutting mode, the cutting length, and the welding point allowable water are inputted to the PLC 19 from the processor computer 20 shown in FIG. 2, the PLC 19 first cuts the welding mode. Determine whether the mode is applied.

When it is determined that the PLC 19 is in the welding part cutting mode, the sensor detects the hole detection sensing signal from the welding hole detection sensor 18 and accumulates the number of passes of the welding point according to the hole detection signal. The welding hole detection operation and the counting operation are repeated until the welding point tolerance is reached.

On the other hand, when the reception count value reaches the welding point allowable number, the cutting speed (50M / min) is reduced to the progress and exit speed between the cutters, the cutting material is cut through the operation instructions of the cutter (16), the number of accumulated welding point passing Is set to 0, then the welding part cutting mode operation is finished.

On the other hand, it is determined that the cutting mode is not the welding part cutting mode, and it is determined whether or not the measured length measured by the length measuring sensor 18 installed in the tension reel 17 is equal to or larger than the cut length setting value, Command to decelerate at the cutting speed (70M / min), cut the material through the operation instruction of the cutter 16, and set the accumulated measurement length of the length measuring sensor 18 of the tension reel to 0. It ends.

Therefore, through the product division method according to the present invention, it is possible to improve the degree of automation of the product cutting control and the prediction of the product length, and it is possible to fully guarantee the demand for the required weight, thereby improving the acceptance of the order and reducing the scrap generation rate. By significantly reducing the workload of field workers, it is possible to obtain productivity and product quality per person.

Claims (1)

Products of annealing line equipment including annealing furnace 13, mouth and exit compensators 12 and 14, welding machine 11, payoff reel 10 and tension reel 17, and processor computer 20 An automatic splitting apparatus comprising: a length measuring sensor (18) installed in the tension reel (17) to measure a length of a product; A welding hall sensor 15 that detects the presence or absence of a welding hole provided between the cutter 16 and the exit compensation unit 14; According to the cutting control data of the processor computer 20, the welding score by the welding hole sensor 15 is checked, and if the welding score corresponds to the welding point allowable data value, commanding a decrease in exit speed and cutting of the product. Welding mode for setting the number of passes before welding to " 0 " and the length measurement value by the length measuring sensor 18. If the length measurement value corresponds to the set length data value, the exit speed decreases and A PLC 19 operating in the length cutting mode for commanding cutting and then setting the measured length value to " 0 "; And a cutter (16) for cutting the product in accordance with the instructions of the PLC (19).