JP6892273B2 - Postonilla device - Google Patents

Description

The present invention relates to a post-annealer device, and particularly to a post-annealer device for annealing welded portions between steel sheets in a continuous annealing line.

For example, in the steel sheet manufacturing process, when a steel material is cold-rolled, dislocations caused by plastic deformation are entangled and hardened. Therefore, after the cold rolling process, an annealing treatment is performed to soften the hardened steel material. This quenching is a process of heating steel to reduce lattice defects such as dislocations introduced by processing by diffusion of iron atoms, and to control solid solution / precipitation of solute elements.
In recent years, the mainstream of annealing of cold-rolled coils is continuous annealing in which the coils are put together in a batch, the coils are unwound, a large number of coils are welded one after another, passed through a heating furnace, and then wound again.

FIG. 5 schematically shows the configuration of a typical continuous annealing line.
The continuous annealing line 50 is largely provided with an entry side portion 51, a furnace body portion 52, and an exit side portion 53. The entry side portion 51 includes a payoff reel 54 that feeds out a steel plate coil, a welding device 55 that welds the ends of the steel plates to each other, an electrolytic cleaning device 56 that performs electrolytic cleaning, and an entrance side looper 57. The furnace body 52 has a heating zone, a tropical zone, and a cooling zone (not shown), and is adapted to perform a predetermined heat treatment and cooling treatment. Further, the output side portion 53 includes a temper rolling device 58, an output side looper 59, a shearing device 60, and a winding device 61.

In the continuous annealing line 50 configured in this way, the coil of the cold-rolled steel material is unwound on the payoff reel 54, and then the tip thereof is welded to the rear end of the steel plate of the preceding material in the welding device 55. Be connected.
After that, the steel plate W is electrolytically cleaned by the electrolytic cleaning device 56, and is carried into the furnace body portion 52 through the inlet looper 57.

In the furnace body 52, the steel plate W is annealed in a heating zone (not shown), soaking in the tropics, cooled by a cooling zone, and flowed to a temper rolling apparatus 58.
In the temper rolling apparatus 58, the rigidity and hardness are adjusted, and at the same time, the surface is finished to be dull or glossy.
The steel plate W tempered by the tempering rolling apparatus 58 is sent to the shearing apparatus 60 via the exit looper 59, where shearing treatment such as ear cutting is performed to a predetermined width, and the coiling apparatus 61 again forms a coil. It is taken up by.

By the way, in recent years, it is necessary to process a wide variety of steel plates W, and depending on the type of steel plate W, the annealing treatment for the welded portion is insufficient only with the furnace body portion 52.
That is, the welded portion of the steel plate W welded in the welding apparatus 55 is fragile due to heating and quenching. Therefore, a post-annealer device (see, for example, Patent Document 1) for improving the structure by heat-treating the welded portion prior to the annealing treatment in the furnace body portion 52 is required immediately after the welding apparatus 55.

Japanese Unexamined Patent Publication No. 52-142612

However, in the existing continuous annealing line as shown in FIG. 5, even if an attempt is made to add a post-annealer device immediately after the welding device 55, the installation area is limited, so that a space for maintenance and heating test cannot be secured and the installation cannot be performed. There was a problem. Therefore, in order to incorporate the post-annealer device into the continuous annealing line, it was necessary to expand the installation area of the entire line.

The present invention has been made by paying attention to the above points, and it is possible to secure a space for maintenance and the like even if the installation area is limited in the existing continuous annealing line, and the heat treatment processing accuracy is good. An object of the present invention is to provide a post-annealer device capable of obtaining a stable work.

In order to solve the above-mentioned problems, the post-annealer device according to the present invention is a post-annealer device that is arranged on a continuous quenching line and heat-treats a work welded portion in which plate-shaped workpieces are welded to each other. A device body is provided so as to be able to advance and retreat in a direction orthogonal to the traveling direction of the work flowing above, and the device body is formed in a U shape when viewed from the traveling direction of the work, and heat-treats the work. A housing portion that forms a U-shaped internal processing space and allows the work to be placed in the processing space by advancing the apparatus main body, and a housing portion provided in the processing space of the housing portion to move the work up and down. A clamp means that is narrowly held by the work, a laser marker device that irradiates the upper surface of the work with a line-shaped laser mark, and a linear welding of the work that is narrowly held by the clamp means and aligned with the line-shaped laser mark. A heating means that heats the portion from one surface side of the work, and a cooling means that cools the welded portion of the work sandwiched by the clamping means from the surface opposite to the one surface heated by the heating means. It is characterized by having and.
It is desirable that the heating means is an electromagnetic induction coil provided in the processing space.
Further, it is desirable that the cooling means is arranged along the line-shaped welded portion of the work in the processing space and has a plurality of air cooling nozzles for injecting cooling air to the welded portion of the work.

According to such a configuration, it is possible to retract the main body of the apparatus except for the processing process by the post-annealer apparatus, and perform maintenance and heating tests. Therefore, the post-annealer device can be incorporated into the continuous annealing line even if the footprint on the continuous annealing line is limited.
Further, since the housing portion is U-shaped, the welded portion can be easily visually recognized from the operator side, and accurate heat treatment can be performed by, for example, aligning the laser marker with the welded portion.

Further, the heating means, the control means for controlling the operation of the cooling means, and the temperature measuring means for measuring the temperature of the work are provided, and the control means has the temperature value of the work measured by the temperature measuring means. It is desirable to control the operation of the heating means and the cooling means based on the PID control using the target temperature value.
Further, the heating means based on the PID control and the storage means for accumulating the control pattern information related to the operation control of the cooling means are provided, and the control means heats the heating means based on the control pattern information stored in the storage means. It is desirable that the means and the cooling means can be controlled in operation.
As described above, during heating, PID control, which is feedback control, is performed by using the temperature measuring means, so that a heat-treated processed product having stable quality can be obtained.
Further, in the heat treatment by feedback control, since the pattern information related to the heating control is stored in the storage means, the pattern control based on the past control pattern is performed and heating is performed without stopping the device even when a malfunction occurs in the thermometer or the like. It can be processed, and it becomes easy to identify the cause when a quality defect occurs.

According to the present invention, a post-annealer device capable of securing a space for maintenance and the like in an existing continuous annealing line even if the installation area is limited, and can obtain a stable work piece with good heat treatment processing accuracy and quality. Can be provided.

FIG. 1 is a front view (partial cross section) of the post-annealer device of the present invention. FIG. 2 is a side view of the post-annealer device of FIG. FIG. 3 is a flow chart showing an operation flow of the post-annealer device of FIG. FIG. 4 is a flow chart following the flow of FIG. FIG. 5 is a schematic view showing the configuration of a conventional continuous annealing line.

Hereinafter, embodiments of the post-annealer device according to the present invention will be described with reference to the drawings. The post-annealer device according to the present invention is arranged in a narrow space between the welding device 55 and the electrolytic cleaning device 56 in the continuous annealing line 50 shown in FIG. Then, the welded portion between the trailing end of the leading material and the tip of the trailing material of the steel plate, which is the work piece, welded by the welding device 55 is annealed to improve the structure.

FIG. 1 is a front view (partial cross section) of the post-annealer device of the present invention. 2 is a side view of the post-annealer device of FIG. 1. FIG.
The illustrated post-annealer device 1 includes a device main body 2 and a rail 3 for allowing the device main body 2 to move forward and backward with respect to a work W (steel plate) flowing on a continuous annealing line.
Wheels 4 for traveling on the rail 3 are provided in the front and rear on the bottom of the device main body 2. As a result, as shown in FIG. 2, the apparatus main body 2 is arranged at an advanced position (called a work side) when annealing the work W, and at a retracted position (called a drive side) in the standby state. It is designed to be placed. In the following description, the work side shown in FIG. 2 is the front side, and the drive side is the rear side.

The apparatus main body 2 has a U-shaped housing portion 5 in which a work W carried in a horizontal state is heat-processed. The U-shaped housing portion 5 has a front opening 5a, left and right openings 5b, 5c (see FIG. 1), and a processing space 5d inside the U-shape that communicates with them.
The heat processing treatment for the welded portion W1 of the work W is performed in the processing space 5d. Since the housing portion 5 is formed in a U shape in this way, the operator can use the front opening 5a and the left and right openings. The state of the welded portion W1 in the processing space 5d can be visually recognized from the 5b and 5c sides.

As shown in FIG. 1, a lower clamp member 6 (clamping means) is fixedly arranged at the bottom of the processing space 5d of the housing portion 5, and an upper clamp member 7 (upper clamp member 7 (clamping means) facing the lower clamp member 6 is above the lower clamp member 6 (clamping means). Clamp means) is arranged so that it can be moved up and down. The up-and-down movement of the upper clamp member 7 is performed by two hydraulic cylinder devices 8 arranged above the housing portion 5.
As shown in the figure, during the heat processing process, the work W is clamped from above and below by the lower clamp member 6 and the upper clamp member 7.

Further, as shown in FIG. 1, the lower clamp member 6 and the upper clamp member 7 are arranged in pairs on the left and right, respectively, and the welded portion W1 of the work W is arranged between them (center portion) during the heat processing process. It is supposed to be done.
Further, an electromagnetic induction coil 9 (heating means) for heating the welded portion W1 of the work W from above the work W is provided between the upper clamp members 7 arranged in pairs on the left and right in FIG. There is. As shown in FIG. 2, the electromagnetic induction coil 9 is formed to have a length at least equal to or greater than the width of the work W in the width direction of the work W.

Further, as shown in FIG. 1, a pair of receiving rollers 10 for supporting the work W are provided on the left and right outer sides of the lower clamp members 6 arranged in pairs on the left and right.
Further, a plurality of air cooling nozzles 11 (cooling means) arranged linearly in the width direction of the work W as shown in FIGS. 1 and 2 between the lower clamp members 6 arranged in pairs on the left and right sides. Is provided, and cooling air is injected from below to the welded portion W1 of the work W after heating to cool the work welded portion W1.

Further, similarly to the air cooling nozzle 11, as a temperature measuring means for detecting the temperature of a predetermined portion of the work W as shown in FIG. 2, between the lower clamp members 6 arranged in pairs on the left and right in FIG. A first thermometer 12, a second thermometer 13, and a third thermometer 14 are provided, respectively. Of these, the first thermometer 12 is provided so as to measure the temperature at the center of the work W in the width direction. The second thermometer 13 is a low temperature thermometer for measuring the temperature of the work W to be cooled after the completion of heating, and is provided at a position separated from the first thermometer 12 by a predetermined distance (for example, 200 mm). .. Further, the third thermometer 14 is for measuring the temperature of the work end position away from the center in the width direction of the work W, and is provided at a position 600 mm away from the first thermometer 12, for example. ..

Further, as shown in FIG. 2, a CCD camera 15 is provided in front of the front opening 5a of the housing portion 5 so that the operator can visually recognize the state of the welded portion W1 through a monitor. As a result, remote control can be performed by preparing an operation panel (not shown) even from a place away from the post-annealer device 1.
Further, a laser marker device 16 is arranged next to the CCD camera 15 so as to irradiate the upper surface of the work W with a line-shaped laser mark. That is, by aligning the positions of the line-shaped laser mark and the line-shaped welded portion W1, the electromagnetic induction coil 9 is arranged parallel to the welded portion W1 and the welded portion W1 can be heated with high accuracy.

Further, the post-annealer device 1 includes a programmable logic controller (called PA-PLC) 20 as a control means for controlling the operation of the post-annealer device 1. The PA-PLC 20 receives information on the preceding material and the succeeding material of the work W from the network-connected upper process computer 30, and processing conditions such as heating temperature and heating time.
Further, a server 40 as a storage means is connected to the higher-level process computer 30, and the server 40 stores control pattern data when heat processing is performed in the past, the processing conditions, and the like. The higher-level process computer 30 and the server 40 are provided at a location distant from the device main body 2 and are connected to the PA-PLC 20 via a network, but function as a part of the post-annealer device 1. ..

Subsequently, a series of operations of the post-annealer device 1 configured in this way will be described with reference to the flow of FIG.
First, the programmable logic controller of the post-annealer device 1, that is, PA-PLC20, performs the input setting work of the machining conditions. Specifically, in the case of the automatic operation mode (step S1 in FIG. 3) in the state where the main body device 2 is arranged on the drive side which is the retracted position, the PA-PLC20 is the machining condition (preceding material of the work W). , Information on the trailing material, heating temperature, heating time, etc.) is received from the host process controller 30 and set (step S2 in FIG. 3).
Alternatively, when the mode is not in the automatic operation mode (step S1 in FIG. 3), the operator inputs and sets the machining conditions in the PA-PLC20 by using the operation touch panel (not shown) provided in the housing 5 (step S18 in FIG. 3). ).

Next, the PA-PLC 20 moves the main body device 2 toward the work side along the rail 3 (step S3 in FIG. 3). Then, the work W is carried in while being supported by the receiving roller 10 from the left opening 5d side of the housing portion 5, and the welded portion W1 is arranged at a position directly below the electromagnetic induction coil 9 as shown in FIG. 1 (FIG. 3). Step S4).
Then, the PA-PLC 20 drives the hydraulic cylinder device 8 to lower the upper clamp member 7 (and the electromagnetic induction coil 9), and the work W is narrowed from the upper and lower sides by the upper clamp member 7 and the lower clamp member 6. (Clamp) (step S5 in FIG. 3).

Next, the PA-PLC 20 supplies electric power to the electromagnetic induction coil 9 based on the set processing conditions, and starts heating the welded portion W1 of the work W from above by the induction heating (step S6 in FIG. 3).
Here, when the heat treatment is performed by feedback control (step S7 in FIG. 3), the PA-PLC 20 uses the temperature value and the target value measured by the first thermometer 12 to control the heating temperature based on the PID control. (Step S8 in FIG. 3). The actual information (heating control pattern) whose heating is controlled by the feedback control is periodically (for example, every second) transmitted to the host process controller 30 (step S20 in FIG. 3) and stored in the server 40 (FIG. 3). Step S21). During the heat treatment by this feedback control, the temperature data of the work end measured by the third thermometer 14 is also sent to the PA-PLC20, and it is monitored whether or not it is within the specified temperature.

Alternatively, when the heat treatment is performed by pattern control (step S19 in FIG. 3), the PA-PLC 20 performs heat control by referring to the information of the heat pattern by feedback control accumulated in the server 40 in the previous heat treatment. This pattern control mode is provided so that the heat treatment can be performed even when the first thermometer 12 or the like fails.

When the temperature of the work W rises due to the heat treatment (step S9 in FIG. 3) and reaches a predetermined temperature (for example, 700 ° C.), the PA-PLC20 controls the heating so that the temperature is maintained (in FIG. 3). Step S10), after the elapse of a predetermined time (for example, after 30 sec), the induction heat treatment by the electromagnetic induction coil 9 is stopped (step S11 in FIG. 3).

After the heat treatment is completed, the PA-PLC 20 injects cooling air from the plurality of air cooling nozzles 11 onto the upper work W, and starts cooling the welded portion of the heated work W (step S12 in FIG. 4). Since heating and cooling are performed in a state where the work welded portion W1 is clamped from the upper and lower sides in this way, distortion during machining can be suppressed.
During the cooling process, the PA-PLC 20 looks at the temperature measured by the second thermometer 13, and when it becomes a predetermined temperature (for example, the heat resistant temperature of the receiving roller 10 is 150 ° C.) (step S13 in FIG. 4), the air cooling nozzle The injection from No. 11 is stopped, and the cooling process is completed (step S14 in FIG. 4). During this cooling process, the temperature data of the work end measured by the third thermometer 14 is also sent to the PA-PLC 20 to monitor whether the temperature is within the specified temperature.

When the cooling process is completed, the PA-PLC 20 drives the hydraulic cylinder device 8 to raise the upper clamp member 7 (and the electromagnetic induction coil 9) to clamp the work W by the upper clamp member 7 and the lower clamp member 6. Is released (step S15 in FIG. 4).
Then, the receiving roller 10 is rotationally driven, and the work W for which the annealing treatment of the welded portion W1 has been completed is carried out from the right opening 5c side (step S16 in FIG. 4).
Further, the apparatus main body 2 is retracted along the rail 3 and moved to the drive side which is a standby position (step S17 in FIG. 4), and the heat processing treatment (annealing treatment) for one welded portion W1 is completed.

As described above, according to the embodiment of the present invention, the device main body of the post-annealer device 1 is arranged so as to be able to advance and retreat with respect to the work W, and the housing portion 5 of the device main body is U-shaped so that the inside of the U-shape is formed. The work welded portion W1 is heat-treated in the processing space 5d of the above.
As a result, it is possible to evacuate to the drive side except for the processing process by the post-annealer device 1, and perform maintenance and heating tests on the drive side. Therefore, the post-annealer device can be incorporated into the continuous annealing line even if the footprint on the continuous annealing line is limited.
Further, since the housing portion 5 is U-shaped, the welded portion W1 can be easily visually recognized from the operator side, and the laser marker can be aligned with the welded portion W1 to enable accurate heat treatment.
Further, during heat processing, feedback control (PID temperature control) is performed using a plurality of thermometers to monitor the cooling temperature and the temperature other than the center of the work W, so that a processed product with stable quality can be obtained.
Further, in the heat treatment by feedback control, since the data related to the heat control is saved in the server 40, the pattern control based on the past control pattern is performed and the heat treatment is performed without stopping the device even when a malfunction occurs in the thermometer or the like. In addition, it becomes easy to identify the cause when a quality defect occurs.

In the above-described embodiment, the welded portion W1 is heated from the upper side of the work W and cooled to the welded portion W1 from the lower side of the work W. However, in the present invention, the configuration is shown. The configuration is not limited to the above, and the structure may be such that the work W is heated from the lower side and cooled from the upper side of the work W.

1 Post annealer device 2 Device body 3 Rail 4 Wheels 5 Housing 5a Front opening 5b Left opening 5c Right opening 5d Processing space 6 Lower clamp member (clamping means)
7 Upper clamp member (clamping means)
8 Hydraulic cylinder device 9 Electromagnetic induction coil (heating means)
10 Receiving roller 11 Air cooling nozzle (cooling means)
12 First thermometer (temperature measuring means)
13 Second thermometer (temperature measuring means)
14 Third thermometer (temperature measuring means)
15 CCD camera 16 Laser marker device 20 Programmable logic controller (PA-PLC, control means)
30 Upper process controller 40 Server (storage means)
W work W1 weld

Claims (5)

It is a post-annealer device that is arranged on a continuous annealing line and heat-treats the work welded part where plate-shaped works are welded to each other.
The apparatus main body is provided so as to be able to advance and retreat in a direction orthogonal to the traveling direction of the work flowing on the continuous annealing line.
The device body
It is formed on the workpiece U shape when viewed from the traveling direction of, to form a processing space inside the U-shaped heat-treating the workpiece, to allow placing the workpiece into the processing space by the advancing of the device body With the housing
Clamping means provided in the processing space of the housing portion and holding the work from above and below,
A laser marker device that irradiates the upper surface of the work with a line-shaped laser mark, and
A heating means that heats the linear welded portion of the work, which is sandwiched by the clamping means and aligned with the linear laser mark, from one side of the work.
A cooling means for cooling the welded portion of the work sandwiched by the clamping means from a surface opposite to the one surface heated by the heating means.
A post-annealer device characterized by having. The post-annealer device according to claim 1, wherein the heating means is an electromagnetic induction coil provided in the processing space. 1. The cooling means is arranged along a line-shaped welded portion of the work in the processing space, and has a plurality of air cooling nozzles for injecting cooling air to the welded portion of the work. Alternatively, the post-annealer device according to claim 2. A control means for controlling the operation of the heating means and the cooling means, and
A temperature measuring means for measuring the temperature of the work is provided.
The claim is characterized in that the control means uses the temperature value of the work measured by the temperature measuring means and the target temperature value to control the operation of the heating means and the cooling means based on PID control. The post-annealer device according to any one of 1 to 3. A storage means for accumulating control pattern information related to operation control of the heating means and the cooling means based on the PID control is provided.
The post-annealer device according to claim 4, wherein the control means can control the operation of the heating means and the cooling means based on the control pattern information stored in the storage means.

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