KR20110105017A - Intermittent transper type heat treatment furnace - Google Patents

Intermittent transper type heat treatment furnace Download PDF

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Publication number
KR20110105017A
KR20110105017A KR1020100024004A KR20100024004A KR20110105017A KR 20110105017 A KR20110105017 A KR 20110105017A KR 1020100024004 A KR1020100024004 A KR 1020100024004A KR 20100024004 A KR20100024004 A KR 20100024004A KR 20110105017 A KR20110105017 A KR 20110105017A
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KR
South Korea
Prior art keywords
heat treatment
furnace
roller
transfer
jig
Prior art date
Application number
KR1020100024004A
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Korean (ko)
Inventor
이광래
Original Assignee
우경금속주식회사
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Priority to KR1020100024004A priority Critical patent/KR20110105017A/en
Publication of KR20110105017A publication Critical patent/KR20110105017A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2407—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/02—Observation or illuminating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/122—Preheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0059—Regulation involving the control of the conveyor movement, e.g. speed or sequences

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Abstract

According to the present invention, the heat treatment object continuously transferred in the heat treatment compartment partitioned according to the heat treatment time of the heat treatment object is delayed for a minimum heat treatment time so that the heat treatment is performed, thereby minimizing heat loss in the heat treatment furnace while continuously heat treating the object. It is an object of the present invention to provide a heat treatment furnace of an intermittent feed method that enables the feeding of water.
The heat treatment furnace of the intermittent transfer method according to the present invention for achieving the above object is provided with inlet and outlet side doors that can be opened and closed on both sides, respectively, and are divided into a preheating furnace, a main furnace, and a holding furnace to keep each other airtight. A heat treatment furnace frame provided with an inner door to open and close as possible;
A heat diffusion means provided in the preheating furnace, the main furnace, and the holding furnace, respectively, for thermal diffusion therein; At least one roller conveying means for delaying and conveying a conveying jig loaded with a heat treatment object on the bottom for a heat treatment time; A thermocouple for detecting an internal temperature; A heater for internal heating; And a controller for controlling the operation of the heater based on the operation control of the thermal diffusion means and the roller transfer means and the temperature signal of the thermocouple.

Figure P1020100024004

Description

Heat Treatment Furnace of Intermittent Transfer Method {INTERMITTENT TRANSPER TYPE HEAT TREATMENT FURNACE}

The present invention relates to a heat treatment furnace of an intermittent transfer method, and more particularly, an intermittent heat treatment furnace capable of automating by automatically transporting a transfer jig loaded with a heat treatment object while minimizing heat loss due to heat treatment. It is about.

Generally, a heat treatment furnace can be roughly classified into a continuous heat treatment furnace in which heat treatment is carried out while continuously transporting a small heat treatment object, and a box heat treatment furnace for heat treating a large heat treatment object or a predetermined number of heat treatment objects at once.

Continuous heat treatment furnace is provided with a conveyor means in the longitudinal direction in the heat treatment furnace frame that is open on both sides. The conveyor means transfers the heat treatment object at a predetermined time interval, and the feeding speed is controlled so that the heat treatment object can be exposed for the time required for the heat treatment. Therefore, all the heat treatments are completed while the heat treatment object is transferred by the conveyor means and passes through the heat treatment furnace frame.

Such a continuous heat treatment furnace is advantageous in continuity because it continuously supplies the heat treatment object through the conveyor means, but since both sides of the heat treatment furnace frame are open, a lot of heat loss has occurred. This is not only because the energy consumption is increased due to the decrease in energy efficiency, but the heat treatment object may be exposed to the outside air, which may lead to deterioration of the quality of the heat treated product.

Box-type heat treatment furnace is made of a closed box shape having a predetermined size, the upper portion is provided with opening and closing means such as an openable door. The box-type heat treatment furnace inserts a predetermined number or a large heat treatment object into the furnace, and heat-opens and removes the heat treatment object from the heat treatment furnace by opening and closing the means after the heat treatment for the required heat treatment time.

However, since the conventional box-type heat treatment furnace is heat-sealed to the heat treatment furnace frame by the opening and closing means during the heat treatment, there is no fear that the heat treatment object is exposed to the outside air, thereby improving heat treatment quality. However, the conventional box-type heat treatment furnace has a limitation in the continuity due to heat treatment because the opening and closing means to open and close the opening and closing of the heat treatment object.

The present invention has been made in view of this point, and the heat treatment object continuously transferred in the heat treatment compartment partitioned according to the heat treatment time of the heat treatment object is delayed during the minimum heat treatment time to perform the heat treatment in the interior of the heat treatment furnace It is an object of the present invention to provide a heat treatment furnace of an intermittent transfer method that can continuously transfer heat treatment objects while minimizing heat loss.

The heat treatment furnace of the intermittent transfer method according to the present invention for achieving the above object, the inlet side door and the outlet side door is provided on each side, and the inside of the preheating furnace, the main furnace and the holding furnace to be separated from each other to be kept airtight. A heat treatment furnace frame provided with an openable inner door;

In the preheating furnace, the main furnace and the maintenance furnace respectively,

Thermal diffusion means provided to allow thermal diffusion therein; At least one roller conveying means for delaying and conveying a conveying jig loaded with a heat treatment object on the bottom for a heat treatment time; A thermocouple for detecting an internal temperature; A heater for internal heating; And a controller for controlling the operation of the heater based on the operation control of the thermal diffusion means and the roller transfer means and the temperature signal of the thermocouple.

In particular, the heat diffusion means is characterized in that the drive fan is installed inside the heat treatment furnace frame, and the drive motor is installed outside the heat treatment furnace frame to drive the drive fan.

In addition, the roller transport means, a plurality of rollers are provided at regular intervals in the width direction with respect to the transport direction of the transfer jig; A chain that connects adjacent rollers to interlock with each other; And a driving motor for rotating the chain. And

An elevating jig positioned below the plurality of rollers and installed to protrude upwardly therebetween to elevate and transfer the transfer jig; And an elevating means including an actuator providing an actuation force to the elevating jig.

At this time, each roller is formed in a hollow cylindrical shape, and a pair of sprockets are formed at both ends thereof, respectively, and a reinforcing member supporting the grid is provided. It is characterized in that the protrusions are further formed to guide the direction of transport stably.

In particular, the roller conveying means according to the present invention is characterized in that the elevating means to elevate the transfer jig by a short period of the heat treatment time of the preheating furnace and the main furnace.

On the other hand, the heat treatment furnace of the intermittent transfer method according to the present invention, the heat treatment furnace frame is provided with a rotary feed roller of the turntable method to change the transfer direction of the transfer jig on the inlet side, the same as the roller transfer means on the outlet side It is characterized in that the roller conveying means is further provided.

According to the heat treatment furnace of the intermittent transfer method of the present invention, the following effects are obtained.

First, the heat loss to the outside of the heat treatment furnace frame can be reduced, and in particular, since the heat treatment can be stably performed, productivity can be improved.

Secondly, the inside of the heat treatment furnace is divided into a preheating furnace, a main furnace and a holding furnace, which is provided with an inner door that can be opened and closed to maintain airtightness, and can block heat loss to the outside of the heat treatment furnace when the inner door is opened and closed. The inlet and outlet doors that can be opened and closed respectively can reduce heat loss lost to the outside of the heat treatment furnace when entering and exiting the heat treatment object, compared to the case where the door is installed on the top of the heat treatment furnace, thereby reducing the power consumption required for heat treatment. There is an effect that can eventually reduce the energy consumption (about 50% reduction of the power cost by the box-type heat treatment is installed on the top door opening and closing in the prior art).

Third, since the internal temperature and time of each furnace divided into compartments can be operated independently, it is possible to secure work safety and continuity of work.

Fourth, since the transfer time can be adjusted according to the heat treatment time varies depending on the heat treatment object, any heat treatment can be performed through one heat treatment furnace.

Fifth, by providing a turntable rotary feed roller at the inlet side of the heat treatment furnace to change the transfer direction of the transfer jig loaded with the heat treatment object, it is easy to install in a narrow space can be improved space utilization.

1 is a cross-sectional view for showing the overall configuration of the heat treatment furnace according to the present invention.
Figure 2 is a perspective view showing a part to explain the configuration of a roller according to the present invention.
3A to 3I are cross-sectional views illustrating a heat treatment procedure of the heat treatment furnace of the intermittent transfer method according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

(Configuration by heat treatment)

1 is a cross-sectional view for showing the overall configuration of the heat treatment furnace according to the present invention. Here, reference numeral "O" denotes a heat treatment target to be heat treated, and "J" denotes a transfer jig for transferring the heat treatment target.

The heat treatment furnace according to the present invention is provided with an inlet door 110a and an outlet door 110d that can be opened and closed, and are divided into a preheating furnace 100a, a main furnace 100b, and a holding furnace 100c inside each other to be airtight. It includes a heat treatment furnace frame 100 is provided with an inner door (110b, 110c) that can be opened and closed.

In particular, the inlet side door (110a), the inner door (110b, 110c) and the outlet side door (110d) are respectively installed to open and close up and down by an actuator (not shown), such as a cylinder. Of course, these doors (110a ~ 110d) may be opened and closed by the motor drive using the tension of the wire. In addition, reference numeral "W" not illustrated in FIG. 1 means a counter-balancing weight that allows the doors 110a to 110d to be opened and closed stably without sudden opening and closing. These actuators operate under the control of a controller which will be described later.

The heat treatment furnace frame 100 may be made of any material as long as it can withstand the temperature required for heat treatment, but most preferably, it is made of a firebrick.

On the other hand, in the heat treatment furnace frame 100 according to the present invention, the heat diffusion means 120 and the roller transfer means for transporting the heat treatment object (O) to be exposed to heat for a predetermined time to facilitate heat diffusion therein 130a to 130d, a thermocouple 140 and heater 150 for the detection and heating of the internal temperature, and a controller for controlling these components.

The heat diffusion means 120 is installed in the preheating furnace 100a, the main heating furnace 100b and the holding furnace 100c, respectively, to maintain a constant temperature by circulating hot air generated from the heater 150.

The heat diffusion means 120 includes a drive fan 121 installed inside the heat treatment furnace frame 100 to substantially circulate the hot air, and a drive motor 122 for driving the drive fan 121. do.

The drive motor 122 is installed outside the heat treatment furnace frame 100 by extending the drive shaft, and operates while the heat treatment furnace is operated under the control of a controller which will be described later.

Roller transfer means (130a ~ 130d) is provided as necessary in the preheating furnace (100a), the main furnace (100b) and the holding furnace (100c). That is, in FIG. 1, one roller conveying means 130a and 130b are installed in the preheating furnace 100a and the main heating furnace 100b, respectively, and two roller conveying means 130c and 130d are provided in the holding furnace 100c. The installed example is shown. This is because the heat treatment time in the holding furnace 100c is generally longer than the heat treatment time in the preheating furnace 100a and the main furnace 100b.

The roller conveying means (130a ~ 130d) is a conveying part for transferring the conveying jig (J) to the adjacent compartment, and the conveying jig (J) spaced apart from the conveying part for a predetermined time so that the heat treatment to the heat treatment object (O) It includes a lifting means for letting.

The conveying part includes a plurality of rollers 131 provided at predetermined intervals in the width direction with respect to the conveying direction of the conveying jig, a chain C connecting the rollers 131 so as to rotate in association with the chain, and a chain A drive motor (not shown) for driving (see FIGS. 1 and 2).

In particular, the roller 131, as shown in Figure 2 showing an example of the roller according to the invention, is manufactured in a hollow for weight reduction, the reinforcing member 134 is installed inside. The reinforcing member 134 is connected to the roller 131 by a grid-like rib and is installed to be able to complement each other, and sprockets 134a and 134b are formed at both ends to install a pair of the chains C, respectively. . These sprockets 134a and 134b are connected by a chain C between other adjacent rollers 131. On the outer circumferential surface of the roller 131, protrusions 135 each having a predetermined width are protruded. The protrusion 135 guides the groove portion P formed on the bottom surface of the transfer jig to allow the transfer jig to be stably transferred.

The conveying unit thus formed is connected to two adjacent rollers 131 by a chain C, and one side of the conveying unit is provided with a driving motor (not shown). The drive motor is controlled through the control of the controller, which is controlled to be driven continuously during the heat treatment or to be driven only when it is moved.

As shown in FIG. 1, the lifting means includes an elevating jig 132 having an upper end protruded therebetween through the plurality of rollers 131, and an actuator for providing an up and down operation of the elevating jig 132. 133).

The lifting jig 132 is moved up and down so that the transfer jig J does not come into contact with the roller 131 during the heat treatment time, or when the heat treatment time elapses, the jig J is lowered again to contact the roller 131. To be transported to the next compartment.

The actuator 133 may use a pneumatic cylinder, a hydraulic cylinder, a cam drive device or a gear drive device as a driving means for substantially operating the lifting jig 132. In particular, the actuator 133 is to control the time that the lifting jig 132 is lifted up through the controller. That is, the controller controls the lifting jig 132 to be lifted up independently from the preheating furnace 100a, the main furnace 100b, and the holding furnace 100c, respectively. This method can control the closing time of each furnace, thereby minimizing heat loss.

In addition, the lifting means may further comprise a weight (not shown) to have a counter balancing valve function so that the lifting jig 132 can move up and down stably during the operation of the actuator 133.

The thermocouple 140 is installed in the preheating furnace 100a, the main furnace 100b and the holding furnace 100c, respectively, and detects the internal temperature of each furnace and outputs it to the controller. This is to control the heat treatment in the preheating furnace 100a, the main furnace 100b and the holding furnace 100c at different temperature conditions.

The heater 150 uses a conventionally manufactured one that is commonly used for heat treatment, such as an electric heater. The heater 150 is installed in the preheating furnace 100a, the main heating furnace 100b, and the holding furnace 100c, respectively, and controlled to maintain the set temperature through the controller.

The controller controls the operation of the heater 150 based on the operation control of the thermal diffusion means 120 and the roller transfer means 130a to 130d and the temperature signal of the thermocouple 140, which will be described in more detail in the description below. Explain.

On the other hand, the heat treatment furnace of the intermittent transfer method according to the present invention, the rotary feed roller 160 is provided on the inlet side of the heat treatment furnace frame 100 so as to change the entry direction of the feed jig (J), the roller feed on the outlet side Means 170 are provided. It is disadvantageous in terms of space utilization because the length of the heat treatment furnace is lengthened if the transfer jig J is configured to be transferred in the longitudinal direction of the heat treatment furnace frame 100. This is to allow the transfer jig (J) to be transferred in the width direction of the heat treatment furnace frame 100, thereby increasing the space utilization. The rotary feed roller 160 employs a turntable method made of a conventional technique, and the roller feed means 170 employs the roller feed means 130a to 130d described above.

(work)

3A to 3I are cross-sectional views illustrating a heat treatment procedure of the heat treatment furnace of the intermittent transfer method according to the present invention. Here, the reference numerals for the configurations of the present invention described above are used as they are.

The controller operates the heat diffusion means 120 while the heat treatment process is continued so that the heat of the preheating furnace 100a, the main furnace 100b and the holding furnace 100c is evenly spread. In addition, the controller operates the actuator 133 to control the roller 131 to be continuously rotated. Then, the thermocouple 140 detects the internal temperature of the preheating furnace 100a, the main furnace 100b, and the holding furnace 100c, and controls each heater 150 based on the thermocouple 140 to maintain the set temperature. Finally, the controller controls the lifting means in accordance with a pre-input heat treatment time.

Here, the heat treatment time input in advance is a time taken for heat treatment normally, and in this invention, it means the actual heat treatment time which respectively consists of the preheating furnace 100a, the main furnace 100b, and the holding furnace 100c. And, these heat treatment time usually takes a lot of time compared to the other furnace holding furnace (100c). For convenience of description, the heat treatment time of the preheating furnace 100a and the main furnace 100b is set to 20 minutes, and the heat treatment time of the holding furnace 100c is input to 40 minutes. And, the internal temperature of the preheating furnace (100a), the main furnace (100b) and the holding furnace (100c) is set, it can be easily understood by those skilled in the art that this is made by the control of the thermocouple 140 and the heater 150 Therefore, detailed description thereof is omitted here.

In the present invention, the controller is controlled by the queue method, which will be briefly described as follows.

By preheating In earnest With keeping ● X ● ○ ● ○ X ● ■ ○ ● ■ ○ X ● ☆ ■ ○ ●

In Table 1, ●, ○, ■ and ☆ respectively represent a new transfer jig on which a heat treatment object is mounted, and “X” represents an empty state, respectively. Then, the controller first controls the transfer of the transfer jig to the neighboring furnace, the queue method to send the transfer jig behind the empty furnace.

As described above, when the preliminary step is completed, the controller opens the inlet door 110a. Accordingly, the transfer jig J in which the heat treatment object O is loaded through the rotation feed roller 160 enters the preheating path 100a as shown by the arrow in FIG. 3A. At this time, the controller operates the roller feed means 130a of the rotary feed roller 160 and the preheating path 100a.

When the feed jig comes to the center position of the roller feed means 130a, the controller controls the lifting means. That is, the controller operates the actuator 133, and as shown by the arrow in FIG. 3B, the lifting jig 132 lifts the feeding jig J and delays the feeding so that it is not fed anymore, and at the same time, the entrance door ( Close 110a).

When the heat treatment time, that is, 20 minutes, elapses in the preheating furnace 100a, the controller operates the actuator 133 to open the inner door 110b and then lowers the lifting jig 132 as shown in FIG. 3a. Accordingly, as indicated by the arrow in FIG. 3C, the transfer jig J is transferred to the main furnace 100b.

Then, the controller operates the actuator 133 and lifts the transfer jig J of the main furnace 100b as indicated by the arrow in FIG. 3d, closes the inner door 110b, and then closes the inlet door 110a. Open. Then, the transfer jig (J) having a new heat treatment object (O) is introduced into the preheating furnace (100a) by using the rotary feed roller (160), and then lifts the lifting jig 132 of the preheating furnace (100a). At the same time close the inlet door (110a) and maintain a preheating state for 20 minutes. Accordingly, the heat treatment object O laminated on the transfer jig J introduced into the preheating furnace 100a is in a preheated state, and the heat treatment object O of the heat furnace 100b is in a heated state.

In the next operation, the controller opens the inner door 110c, lowers the lifting jig 132 in the main furnace 100b, and then drives the roller transport means 130b and 130c. As a result, the transfer jig J is transferred to the holding furnace 100c as shown in FIG. 3E, and at the same time, the lifting jig 132 of the holding furnace 100c is raised as shown in FIG. 3F, and the inner door 110c is closed. . Then, the controller opens the inner door 110b and lowers the lifting jig 132 inside the preheating furnace 100a, and then transfers the roller conveying means 130a and 130b to transfer the conveying jig J as shown in FIG. 3e. Transfer to the main furnace (100b). At the same time, the controller raises the lifting jig 132 inside the main furnace 100b and closes the inner door 110b as shown in FIG. 3F. Finally, the controller opens the inlet side door 110a and the heat treatment object enters the preheating furnace 100a through the new feed jig J through the rotary feed roller 160, and then the elevating of the preheating furnace 100a. Lift the jig 132 and at the same time close the inlet side door 110a and maintain this state for 20 minutes.

Then, the controller repeats the procedure as described with reference to FIGS. 3A to 3F. At this time, since there is no internal door between the roller conveying means (130c, 130d) in the holding path (100c), the transfer jig J is transferred only in the holding path (100c) as shown in Figs. (O) is heat treated for 40 minutes.

Finally, the controller opens the exit door (110d) as shown in Figure 3i to the outside of the heat treatment furnace frame 100 by using the roller transfer means 130d and the roller transfer means 170 to the transfer jig j is completed heat treatment. Will be taken out. Accordingly, the heat treatment object O mounted on the transfer jig J has a time of 20 minutes in the preheating furnace 100a, a time of 20 minutes in the main furnace 100b, and a time of 40 minutes in the holding furnace 100c. During the heat treatment.

As described above, the heat treatment furnace of the intermittent transfer method according to the present invention allows the doors to be opened only while the transfer jig J is transferred, thereby minimizing heat loss due to heat treatment in the heat treatment furnace frame 100. In particular, the heat treatment furnace frame 100 is divided into a preheating furnace (100a), the main furnace (100b) and the holding furnace (100c) is carried out step by step while being transported in each step to improve the productivity through continuity You will get

The reason for operating each room separately is because the temperature of each room is different, the maintenance time is different according to the product type, and also to maintain the set temperature of each room and to minimize the heat loss.

100: heat treatment furnace frame 100a: preheating furnace
100b: main furnace 100c: maintenance furnace
110a: Entrance door 110b, 110c: Internal door
110d: exit side door 120: thermal diffusion means
121: drive fan 122: drive motor
130a ~ 130d: roller conveying means 131: roller
132: lifting jig 133: actuator
134: reinforcing member 134a, 134b: sprocket
135: protrusion 140: thermocouple
150: heater 160: rotary feed roller
170: roller transport means
C: Chain J: Transfer Jig
O: Heat treatment object P: Groove

Claims (6)

Inlet and outlet doors (110a) and outlet doors (110d) that can be opened and closed on both sides, respectively, and is divided into a preheating furnace (100a), a main furnace (100b) and a holding furnace (100c) inside to open and close to enable airtightness to each other. And a heat treatment furnace frame 100 provided with possible inner doors 110b and 110c;
In the preheating furnace 100a, the main furnace 100b and the holding furnace 100c, respectively,
Thermal diffusion means 120 provided to be thermal diffusion therein;
At least one roller transfer means (130a to 130d) for delaying and transferring the transfer jig J on which the heat treatment object O is loaded for a predetermined heat treatment time at the bottom;
A thermocouple 140 for detecting an internal temperature;
A heater 150 for internal heating; And
The controller further controls the operation of the heat diffusion means 120 and the roller transfer means (130a ~ 130d), the operation of the heater 150 based on the temperature signal of the thermocouple 140; Heat treatment furnace of the intermittent transfer method characterized in that.
The method of claim 1,
The thermal diffusion means 120,
A drive fan 121 installed inside the heat treatment furnace frame 100 and a drive motor 122 installed outside the heat treatment furnace frame 100 to drive the drive fan 121. Heat treatment furnace of intermittent feed method.
The method of claim 1,
The roller conveying means (130a ~ 130d),
A plurality of rollers 131 installed at regular intervals in the width direction with respect to the transfer direction of the transfer jig J; A chain (C) for connecting the adjacent rollers (131) to interlock with each other; And a driving motor for rotating the chain (C). And
An elevating jig 132 positioned below the plurality of rollers 131 to protrude upward through the plurality of rollers 131 to elevate the transfer jig J; And an elevating means including an actuator (133) for providing an actuation force to the elevating jig (132).
The method of claim 3, wherein
Each roller 131,
It is made of a hollow cylinder shape, there is provided a pair of sprockets (134a, 134b) at both ends and is provided with a reinforcing member 134 for supporting in a grid form,
Heat treatment furnace of the intermittent transfer method, characterized in that the outer peripheral surface is further provided with a projection (135) is inserted into a pair of grooves (P) formed on the bottom surface of the transfer jig (J) to guide the transport direction stably.
The method of claim 3, wherein
The roller conveying means (130a ~ 130d) is a period of the heat treatment time of the preheating furnace (100a) and the main furnace (100b) by a period of the lifting means is characterized in that the lifting means to raise and lower the transfer jig (J). Heat treatment furnace of intermittent feed method.
6. The method according to any one of claims 1 to 5,
The heat treatment furnace frame 100,
A turntable rotary feed roller 160 is provided at the inlet side so as to change the conveying direction of the conveying jig J.
Heat treatment furnace of the intermittent transfer method, characterized in that the roller feed means (170) and the same as the roller feed means (130a to 130d) is further provided on the outlet side.
KR1020100024004A 2010-03-18 2010-03-18 Intermittent transper type heat treatment furnace KR20110105017A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101289105B1 (en) * 2011-11-08 2013-07-23 주식회사 포스코 Furnace for heating material and heating method of use it
KR102671679B1 (en) * 2023-09-15 2024-06-03 퍼니스원 주식회사 Heat treatment device with fireproofing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101289105B1 (en) * 2011-11-08 2013-07-23 주식회사 포스코 Furnace for heating material and heating method of use it
KR102671679B1 (en) * 2023-09-15 2024-06-03 퍼니스원 주식회사 Heat treatment device with fireproofing

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