KR20040025755A - Apparatus for cutting high-temperature scrap-coil, using rapid cooling - Google Patents

Abstract

PURPOSE: An apparatus for crushing high temperature scrap coil using rapid cooling is provided which is capable of skipping posttreatment process and improving transportation efficiency by crushing the coil to small pieces by applying mechanical impact to coil whose material is changed by rapidly cooling the tail end of high temperature scrap coil. CONSTITUTION: In an apparatus for treating scrap coil(5) at the tail end of wire rod discharged from coil coiler and transferred to conveyor rollers(3), the apparatus for crushing high temperature scrap coil using rapid cooling comprises a wire rod sensing and stopping means comprising a pair of sensing sensors(8) installed with being penetrated into both side guides(3a) of the conveyor rollers, and a stopper roller(10) at a central part of which a stopper pin(10a) is formed as the stopper roller is being rotationally operated by stopper driving cylinder(9) so that the stopper roller is operated according to sensing signals generated from the pair of sensing sensors; and a wire rod cooling and cutting means comprising a lower deformed roller(15) installed at the same elevation as the conveyor rollers in front of the wire rod sensing and stopping means, and an upper deformed roller(13) which is installed directly above the lower deformed roller in such a manner that the upper deformed roller is vertically moved, in which refrigerant injection nozzles(14) are formed, and which is axially connected to driving motor(21).

Description

High temperature scrap coil shredding device using rapid cooling {APPARATUS FOR CUTTING HIGH-TEMPERATURE SCRAP-COIL, USING RAPID COOLING}

The present invention relates to a high temperature scrap coil shredding apparatus using rapid cooling, and more particularly, to rapidly cool the rear end high temperature scrap coil to apply mechanical shock to the changed coil material and to shred it to a small size so as to omit and transport the post-treatment process. The present invention relates to a high temperature scrap coil shredding device using rapid cooling which can improve efficiency.

In general, after heating and hot rolling the raw material at 900 ℃ or higher, the wire or bar produced by winding around 800 ℃ and cooling process is rolled through the rolling mill continuously. Due to the effect of tension at, the shape becomes unstable than the middle part, and the work is performed at a relatively high temperature because water is not cooled for work stability.

Referring to the manufacturing process of the wire rod manufactured by such a high temperature heating process in detail, the material heated to 1000 ℃ or more passes through a continuous hot rolling mill consisting of a step of winding in a coil shape at a high temperature around 800 ℃.

In the related art, as illustrated in FIG. 1 or 3, the rear end portion having passed through the coil winding machine 1 is used to cut a defective portion by using the cutter 4 on the cooling conveyor roller 3 due to insufficient cooling unevenness and shape. Then it is put in the scrap box (6) is transferred to the coil cutting plant, which is a post-process is re-cut into a short length and then put into the steelmaking process.

The conventional process of processing the defective portion of the rear end of the wire is performed by manually cutting and scraping to secure a uniform shape and material over the entire length. The rear end of the cut coil is placed in a box in a coil state without any pre-treatment. In addition to the lack of proper filling, not only manpower and time loss due to frequent box replacements, but also re-cutting work to improve the melting efficiency and workability of scraps during recycling of scrap coils in the steelmaking process In addition, additional time and economic losses occurred.

In order to solve the above problems, the present invention is to automatically detect and cut the defective parts of the hot end of the high temperature wire after cutting and to reduce the shock absorption value of the material by using the material change generated when the high temperature material is rapidly cooled The basic technology is to construct a device that can omit the post-treatment process and improve transportation efficiency by crushing the high temperature scrap material into a small size by giving a mechanical impact to the material.

1 is a flowchart illustrating a conventional rear end coil scrap processing process;

2 is a flowchart illustrating a rear end coil scrap processing process to which a high temperature scrap coil shredding device using rapid cooling according to the present invention is applied;

3 is a schematic diagram of a conventional scrap processing process.

Figure 4 is a perspective view showing the configuration and operation of the high temperature scrap coil shredding device using a rapid cooling according to the present invention;

Figure 5 is a side view showing the operating state of the hot scrap coil shredding device using a rapid cooling according to the present invention;

Figure 6 is an enlarged side view showing a wire cutting unit constituting a high temperature scrap coil crushing device using a rapid cooling according to the present invention;

7 is a block diagram illustrating the operation of a high temperature scrap coil shredding apparatus using rapid cooling according to the present invention.

♠ Explanation of symbols on the main parts of the drawings.

1: coil winding machine 2: rolling coil 3: conveyor roller 4: cutter

5: Rear end scrap coil 6: Scrap box 7: Fracture scrap coil

8: Detection sensor 9: Stopper drive cylinder 10: Stopper roller 10a: Stopper pin

11: Refrigerant supply line 12: Up & down cylinder 13: Upper release roller

14: refrigerant spray nozzle 15: lower release roller 16: scrap / refrigerant induction duct

17: refrigerant opening and closing controller 18: stopper roller rotation controller

In order to achieve the above object, the present invention is a pair of sensing sensors installed through the guides on both sides of the conveyor roller, and the stopper pin is rotated by the stopper drive cylinder to operate according to the detection signal generated therefrom. A wire rod detecting and stopping means formed of a stopper roller formed in the rod; The lower release roller is installed at the same height as the conveyor roller in front of the wire detecting and stopping means, and is installed to be movable upward and downward from the upper side thereof, while a refrigerant spray nozzle is formed therein and is axially coupled to the driving motor 21. It provides a high temperature scrap coil shredding device using rapid cooling, characterized in that consisting of a wire rod cooling cutting means made of a release roller.

In addition, the upper release roller constituting the present invention is installed so as to be movable up and down by a bearing block inserted into the shangdong guide formed integrally on both side guides of the conveyor roller, and a release roller moving cylinder installed on one side thereof. It provides a high temperature scrap coil shredding device using a rapid cooling characterized in that.

The high temperature scrap coil shredding apparatus using the rapid cooling according to the present invention forms a martensite structure when the tissue of the coil wound at a high temperature is rapidly cooled in austenite. Since the expansion of the internal stress increases the hardness of the steel appears to have the material properties that break easily occurs even in a weak impact.

In other words, the present invention proposes a method for processing the rear end of the coil using a martensite transformation structure characteristic when the high temperature material is rapidly cooled, thereby providing a low cost and process omission when treating the rear end coil of the wire coil. have.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.

Figure 4 is a perspective view showing the configuration and operating state of the hot scrap coil shredding device using a rapid cooling according to the present invention, Figure 5 is a side view showing the working state of the hot scrap coil shredding device using a rapid cooling according to the present invention. 6 is an enlarged side view illustrating the wire cutting unit constituting the high temperature scrap coil shredding apparatus using rapid cooling according to the present invention.

The present invention is to crush the coil by installing a release roller (13, 15) to quench the coil in the rear end of the coil winding (1) to shorten the conventional process and to impact the rapidly cooled coil. The device was configured to allow.

As shown in Figures 4 to 6, the detailed operation principle of the high temperature scrap coil shredding device using the rapid cooling according to the present invention is the hot coil rear end portion 5 exiting the coil winding machine 1 between the rollers When it is detected by the installed sensor 8, the stopper roller 10 with the stopper pin 10a attached to the stopper roller 10 is installed at a lower height than the conveyor roller after a predetermined time in proportion to the conveyor roller 3 speed. It is rotated by (9).

At this time, the stopper pin (10a) of the stopper roller 10 is directed upward to stop the progress of the rear end coil (5), the upper and lower release rollers (13, 15) are provided at the front end with a certain time difference Will work.

When the upper release roller 13 is moved downward by the up and down moving cylinder 12, the rotation shaft 13a of the upper release roller 13 at the moment the coil is pressed between the lower release roller 15 and the upper release roller 13. When the refrigerant supplied from the refrigerant supply line 11 penetrated through the center of the sprayed through the injection nozzle 14, the hot coil 5 is rapidly cooled and the martensite transformation occurs instantaneously.

The martensite transformation of the coil is broken by the compression shock between the upper and lower release rollers, and at the same time, the stopper roller 10 having the stopper pin 10a is rotated by the stopper drive cylinder 9 to be restored to its original state. The coil 5 is advanced forward again.

When the advancing coil 5 passes between the upper and lower release rollers 13 and 15 on which the refrigerant is sprayed in a state in which a compression shock is applied, the rapidly cooled coils 5 are guides 3a of both sides of the conveyor roller 3. The bearing block 19 inserted into the shangdong guide 20 integrally formed in the) and the upper release roller 13 installed to be movable up and down by the release roller moving cylinder 12 installed on one side thereof is downwardly operated. At the same time, it is easily broken (cutting) by the shock due to the rotation of the drive motor 21 is axially coupled thereto.

The amount of cut at the rear end of the coil is made by a time delay until the detection sensor 8 made of the photo sensor detects the rear end of the coil and the stopper pin 10a operates.

This delay time is determined by the rolling speed and the speed of the conveyor roller 3, and the cutting amount and position can be changed by adjusting the operation time of the stopper pin 10a as shown in the following equation.

When cutting the wire rod wound N times the coil rear end, the sensing sensor 8 detects the rear end and then selects the correct cutting position so that the stopper pin 10a catches the rear end of the coil and injects refrigerant (T). ) Can be expressed as Equation 1 below, and the time T1 at which the coolant spraying completion and the upper and lower release rollers 13 and 15 are raised is set as the delay time by the controller at the instant that Eq. Can be adjusted.

T = t ₁ + t _a- (N × t _f )-t _d

T1 = T + D / v

here,

t ₁ : End detection time by photosensor

t _a : The time of arrival of the cutting position on the stopper pin, the distance between the photosensor and the stopper pin divided by the conveyor roller speed.

t _f : Time taken for coil to form one ring, coil circumferential length divided by rolling speed

N: number of coiling to cut

t _d : Delay time of stopper pin

D: diameter of one ring coil

v: conveyor roller speed

FIG. 5 illustrates an embodiment of a control procedure and a crushing process in which a scrap crushing apparatus cuts a coil according to the present invention, and the stopper pin 10a rotates after the detection sensor 8 detects an end portion. While stopping the rear end, the interval between the rings of the coil is increased, and the upper release roller 13 is downward while spraying the injection nozzle 14 with the refrigerant, while rotating by the drive motor 21, while the coil rapidly cooled up and down. The release roller (13, 15) is to give a shock to break.

In addition, the refrigerant injected into the injection nozzle 14 may provide a refrigerant supply system to simultaneously use the liquefied gas and the cooling water in order to maximize its cooling ability, and the liquefied gas is mainly used at low cost. .

The broken coils drop together with the refrigerant between the conveyor rollers 3 and enter the scrap box 6 through the induction line 16. The coils are broken by the rotation pitch of the upper and lower release rollers 13 and 15. Because of the short length, additional cutting is unnecessary, and the filling rate of the scrap box 6 is increased, and thus, an additional effect of increasing the transportation efficiency of the replacement cycle is increased.

FIG. 6 shows that after the end portion 5 of the coil is cut, the stopper pin 10a is rotated to restore the original state, and then the refrigerant is connected to the process of breaking the coil and the center of the release rollers 13 and 15. The nozzle nozzle 14 for injecting the coolant supplied from the supply line 11 and the direction are modeled, and the coolant is formed in a wide range by forming the nozzles 14 at the direct and rear ends of the rotating upper release roller 13. By spraying directly on the material to maximize the rapid cooling effect.

In addition, when the diameter of the rolled material is large, the cooling rate does not decrease relatively. Therefore, in the situation where it is necessary to prevent the transformation into martensite due to insufficient cooling capacity, the cooling water refrigerant generally used to compensate for the cooling capacity. The solution can be solved by simultaneously spraying a low temperature liquefied gas.

7 is a block diagram illustrating the operation of a high temperature scrap coil shredding apparatus using rapid cooling according to the present invention.

FIG. 7 is a block diagram showing the operation control of the apparatus of the present invention, and (A) also shows the positions of the upper release roller 13 and the stopper pin 10a in the coil advancing state from the front end to the rear end immediately. 13 remains in an up state and the stopper pin 10a also remains in a down state.

7B shows the stopper pin 10a rotating in an up state in the operation sequence after the rear end 5 of the coil is sensed by the sensor 8 to stop the rear end coil 5. And the upper release roller 13 is down, and the refrigerant is automatically supplied.

As described above, the present invention is generated when the end portion of the coil is automatically sensed and cut and then rapidly cooled to the hot material without the manual work in the process of scraping the defective end of the hot rolled hot material. By reducing the shock absorption value of the material by changing the material, and then impacting the material to break the coil into a small size, it saves time and re-cuts the scrap by reducing the number of scrap box replacements that occurred during the processing of existing wires and rear ends. There is a practical effect that the cost of the work and the additional process can be omitted.

Claims (4)

In the apparatus for processing the rear end scrap coil (5) of the wire rod (2) discharged from the coil winding machine (1) and conveyed to the conveyor roller (3), A stopper pin is rotated by a pair of detection sensors 8 installed through both side guides 3a of the conveyor roller 3 and a stopper drive cylinder 9 to operate according to a detection signal generated therefrom. Wire rod detecting and stopping means (10a) comprising a stopper roller (10) formed at the center portion; The lower release roller 15 is installed at the same height as the conveyor roller 3 in front of the wire detecting and stopping means, and the refrigerant spray nozzle 14 is formed and driven therein while being installed to be movable upward and downward. A high temperature scrap coil crushing device using rapid cooling, characterized in that it comprises a wire rod cooling cutting means consisting of an upper release roller (13) coupled to the motor (21). The method of claim 1, The upper release roller 13 has a bearing block 19 inserted into the shanghai copper guide 20 integrally formed on both side guides 3a of the conveyor roller 3, and a release roller moving cylinder installed at one side thereof. High temperature scrap coil shredding device using a rapid cooling, characterized in that it is installed to be movable up and down by 12). The method according to claim 1 or 2, The upper release roller 13 has a coolant supply line 11 penetrating the central portion of the rotating shaft 13a to supply the coolant to the coolant spray nozzle 14, thereby crushing the high temperature scrap coil using rapid cooling. Device. The method according to claim 1 or 3, The upper release roller (13) is a high temperature scrap coil crushing apparatus using rapid cooling, characterized in that to supply the liquefied gas and the cooling water to the refrigerant supply line (11) at the same time to spray the refrigerant injection nozzle (14).