KR100815718B1 - Heat treatment apparatus for wire rod coil - Google Patents

Abstract

A multi-layer heat treatment apparatus for a wire rod coil is provided to obtain required quality of a wire rod and prevent deterioration of productivity by changing slow and rapid cooling patterns, thereby easily performing a heat treatment operation. As an apparatus for heat treatment of a wire rod coil discharged from a laying head by air cooling, a multi-layer heat treatment apparatus for the wire rod coil comprises: a lower housing(60) of which upper and lower and left and right sides are isolated from the outside; a lower conveyor(20) installed in the lower housing to transfer the wire rod coil through an inner part of the lower housing; an upper housing(70) which is disposed on an upper part of the lower housing, and of which an upper part is opened; an upper conveyor(30) installed in the upper housing to transfer the wire rod coil through an inner part of the upper housing; a rotary conveyor(40) for optionally supplying the wire rod coil discharged from the laying head into the lower housing and the upper housing; and a rotary conveyor(50) for guiding a wire rod coil discharged from the lower housing and the upper housing to a reform tube, wherein the rotary conveyors include a plurality of tables installed in the transfer direction of the wire rod coil such that neighboring tables are rotated together with one another, chains installed in such a shape that the chains encircle upper and lower parts of the tables and perform the movement of the endless track, a drive motor for driving the chains, and a rotary unit including a motor, a worm and a worm gear to rotate the tables.

Description

Heat treatment apparatus for wire rod coil

1 is a schematic configuration diagram showing a production facility of a typical wire rod coil;

2 is a view showing an air-cooled configuration of a wire rod coil in a production facility of a conventional wire rod coil;

3 is a drawing of a problem of the prior art;

4 and 5 are views for explaining the installation position of the blowing nozzle of the cooling air in the air-cooled configuration of the wire rod coil according to the conventional configuration;

6 is a view showing a multilayer heat treatment apparatus of a wire coil according to the present invention;

7 is a perspective view showing a multilayer heat treatment apparatus of a wire coil according to the present invention;

8 is a view showing a rotating conveyor of the present invention.

※ Explanation of symbols about main part of drawing ※

20: lower conveyor 30: upper conveyor

40, 50: rotating conveyor 42: table

44: chain 46: drive motor

52: spring 54: turnbuckle

56: motor 58: worm and worm gear

60: lower housing 62: heating coil

70: upper housing 72: blower

The present invention relates to a multilayer heat treatment apparatus for a wire rod coil.

In general, the wire is produced by rolling after heating the billet material to a certain temperature, such as 1,000 ~ 1,100 ℃ in a heating furnace to enable hot rolling.

That is, as shown in Figure 1, the raw material (B) heated to a constant temperature in the heating furnace 1 is rough rolling (2), intermediate rough rolling (3), intermediate sand rolling (4) and finishing rolling (5) By rolling through the wire rod (W) of the desired dimensions can be produced.

The wire W manufactured to a desired dimension is first cooled by the coolant while passing through the cooling unit 6, and then converted into a spiral wire coil C through a laying head 7. Then, it falls to the conveyor 8, the air cooling heat processing which is secondary cooling in this conveyor 8 is performed, and is integrated in the accumulator 9.

The secondary cooling structure in the conveyor 8 is as shown in FIG.

That is, a plurality of blowers 10A, 10B, 10C, 10D are sequentially arranged in the lower portion of the conveyor 8 along the longitudinal direction of the conveyor 8, and the conveyor 8 has a cooling housing 11 It has the configuration of the form enclosed by). In addition, the cover 12 is installed on the upper portion of the cooling housing 11 to be opened and closed.

Accordingly, the cover 12 is opened and closed in accordance with the speed of air cooling, and appropriate air cooling is achieved by the selective driving of the blowers 10A, 10B, 10C, and 10D and the selection of the driving speed.

At this time, the length L of the wire rod C transferred from the upper part of the conveyor 8 is formed differently according to the size of the material or the speed of the conveyor 8 (see FIG. 3). In the figure, the portion indicated by 'I' represents the interval, that is, the interval between the wire coils (C).

And, as shown in Figure 4, more blowing nozzles 14 are installed on both sides than the central portion of the conveyor (8), which is a wire coil (C) of both sides compared to the central portion of the conveyor (8) This is because the degree of integration is greater. In addition, the conveyor 8 is connected to the drive motor 13 is driven to rotate. Of course, the blowing nozzle 14 is installed to blow the blowing air formed by the blower to the wire coil (C).

If the number and size of the blower nozzles 14 are increased, it is advantageous for the heat treatment of the quenching material, but it tends to adversely affect the heat treatment of the slow cooling material. Therefore, in most cases, in the case of a slow cooling material, the conveyor speed is lowered so that the height of the wire rod coil is made high, and the heat dissipation is delayed. This allows for faster cooling.

In addition, as shown in Figure 5, when the heat treatment of the slow cooling material is performed, the cover 12 is covered on the upper portion of the cooling housing 11 by the driving of the cylinder 15 to block the heat of dissipation, quenching When the heat treatment operation of the ash is performed, the cover 12 is opened at the upper portion of the cooling housing 11 by the driving of the cylinder 15, and has a structure for operating the blower (10). Unexplained reference numeral 16 denotes a weight.

However, this configuration has the following problems.

First, as shown in FIG. 3, when the wire coils C that are spaced apart from each other (I) are to be heat treated in different patterns, that is, the wire coils requiring slow cooling and the wire coils requiring rapid cooling are cooled. When present together inside the housing 11, heat treatment suitable for each of these wire coils C is difficult.

That is, when the slow moving heat treatment is required for the wire rod moving forward and the quench heat treatment is required for the wire rod moving afterwards, the cooling housing 11 is maintained in a condition suitable for the slow cooling heat treatment, and then the wire rod moving in advance is removed from the conveyor. When the heat treatment is changed to a suitable condition for the quench heat treatment, there is a problem that the heat treatment appropriate to the wire coil to be quench heat treatment is not performed properly.

In this case, the distance (I) between the wire coil which requires slow cooling heat treatment and the wire coil which requires rapid quenching heat treatment must be set large, so that the heat treatment suitable for each of the wire rod coil moving ahead and the wire rod moving afterwards is performed. The method was not only a problem that significantly lowered the production speed of the wire rod, but also a fatal problem that the quality of the wire rod was deteriorated by inevitable atmospheric conditions.

Accordingly, the present invention is to solve the above-mentioned problems, and to facilitate the heat treatment according to the pattern change of quenching and slow cooling, so as to obtain the required quality of the wire rod and to prevent the decrease in productivity. It is an object to provide a heat treatment apparatus.

As a technical configuration for achieving the above object, the present invention is a device for heat-treating the wire coil discharged from the laying head by air cooling, the lower housing is blocked up and down and left and right, and the wire rod through the interior of the lower housing A lower conveyor installed to transfer coils, an upper housing disposed above the lower housing and opened at an upper portion thereof, an upper conveyor installed to transfer wire rod coils through the interior of the upper housing, and discharged from the laying head. And a rotational conveyor installed to selectively supply wire rod coils to the lower housing and the upper housing, and a rotational conveyor installed to guide wire rod coils discharged from the lower housing and the upper housing to the reforming tube. Adjacent ones are provided along the conveying direction of the coil The table is provided to be movable, the chain is installed to move in an endless track in the form of wrapping the upper and lower parts of the table, the drive motor connected to drive the chain, and the rotating means for rotating the table, the rotating means is a motor And a multi-layer heat treatment apparatus of the wire rod coil formed of a worm and a worm gear connected to convert the rotational force of the motor to the vertical rotation of the table.

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

Figure 6 is a schematic configuration diagram showing a multilayer heat treatment apparatus of a wire coil according to the present invention, Figure 7 is a cross-sectional view of FIG.

The multi-layer heat treatment apparatus of the present invention has a conveyor that receives the wire rod falling from the laying head and transfers it along a predetermined path. The conveyor includes a lower conveyor 20 and an upper conveyor positioned above the lower conveyor 20. 30). And, the wire coil discharged from this conveyor is integrated in the integrated device through the guide conveyor 22.

The lower conveyor 20 is surrounded by the lower housing 60 having a rectangular cross section to suppress the heat of the wire coil C1 transferred by the lower conveyor 20 from dissipating to the outside, and The lower housing 60 is provided with a heating coil 62 for generating heat by the supply of power.

The upper conveyor 30 is disposed in the upper housing 70 of which the upper part is open, and both sides of the upper housing 70 are connected to the blower 72 to have blown air.

In addition, the apparatus of the present invention is rotatably installed at the inlet side of the upper conveyor 30, the rotating conveyor 40 for guiding the wire rod coil discharged from the laying head toward the upper conveyor 30, and the lower conveyor 20 It is rotatably installed at the exit side, and has the rotation conveyor 50 for guiding the wire rod coil discharged from the lower conveyor 20 toward the guide conveyor 22. As shown in FIG.

The rotational conveyors 40 and 50 are used to change the movement path of the wire rods depending on whether the wire rod coils need quench heat treatment or the wire coils which require quench heat treatment. That is, in the case of the wire rod coil requiring slow cooling heat treatment by driving the rotating conveyors 40 and 50, the wire coils are introduced into the lower housing 60 through the lower conveyor 20 and then discharged to the guide conveyor 22. A path of the wire coil is formed, and in the case of the wire coil which needs quenching heat treatment, a path of the wire coil which is introduced into the upper housing 70 through the upper conveyor 30 and discharged to the guide conveyor 22 is formed. .

The rotating conveyors 40 and 50 described above have substantially the same configuration, which may have the configuration shown in FIG.

The rotating conveyors 40 and 50 are provided along a conveying path of the wire rod coil, and the table 42 and the neighboring ones are rotatably connected to each other, and endless tracks in the form of wrapping the upper and lower parts of the table 42. A chain 44 mounted to move, a drive motor 46 for generating power to rotate the chain 44, and a rotation means for rotating the table 42 as necessary. The chain 44 may have a structure that maintains a certain degree of tension by the weight 48.

The table 42 is rotatably connected, for example, via a hinge pin or the like, and these tables 42 have a configuration in which the rotation angle can be adjusted by the spring 52 and the turn buckle 54 as necessary. Can be. This configuration is configured to rotate the table 42 in a direction opposite to the rotation direction by the spring 52 and a spring 52 for providing an elastic force to rotate the table 42 connected to each other to a preset position. It can be implemented by the turn buckle 54.

The rotating means may be used to rotate the table 42 located at the leftmost end of FIG. 8 at an angle, and the rotating means may use a cylinder.

Alternatively, as shown in the embodiment of the present invention, the motor 56 and the worm and the worm gear 58 for converting the rotational force of the motor 56 into the up and down rotational motion of the table 42 are provided. It may be used.

The operation of the present invention will be described below.

When the material to be rolled in a hot state is a slow cooling material, the coil C1 falling while being wound in a spiral form by the laying head is introduced into the lower housing 60 dedicated to the slow cooling heat treatment through the lower conveyor 20.

The speed of the lower conveyor 20 for moving the coil C1 to the lower housing 60 is set at a low speed suitable for slow cooling, and the rotational conveyor 40 provided at the inlet side has a tip portion thereof indicated by a dotted line in FIG. The rotating conveyor 50 provided at the exit side is rotated so that the tip part may descend as shown by the solid line of FIG.

Therefore, the wire coil C1 that has been slowly cooled by the lower housing 60 is supplied to the guide conveyor 22 through the rotating conveyor 50 and subsequently dropped into the reforming tube and accumulated.

When the material is a quenching material, the rotating conveyor 40 provided at the inlet side is rotated so that its tip portion is lowered as shown by the solid line in Fig. 6, and the rotating conveyor 50 provided at the outlet side is the tip portion thereof. As shown by the dotted line in Fig. 6, it is rotated to ascend.

Therefore, the coil C2 falling from the laying head enters the inside of the upper housing 70 through the rotating conveyor 40 and the upper conveyor 30 provided at the inlet side, and is heat treated, and then guides through the rotating conveyor 50. It is fed to the conveyor 22 and subsequently falls into the reforming tube and is integrated.

At this time, the speed of the upper conveyor 30 is set to have a speed suitable for quenching, quenching is performed by blowing air into the upper housing 70 by the operation of the blower (72).

As described above, according to the multilayer heat treatment apparatus of the wire coil according to the present invention, the upper and lower housings suitable for slow cooling and quenching are provided to allow optimum cooling to be performed by passing the wire rod discharged from the laying head through the upper or lower housing. have.

Claims (6)

An apparatus for heat-treating the wire coil discharged from the laying head by air cooling, A lower housing blocked up, down, left and right, A lower conveyor installed to transfer the wire rod coil through the inside of the lower housing; An upper housing disposed at an upper portion of the lower housing and opened at an upper portion thereof; An upper conveyor installed to transfer the wire rod coil through the inside of the upper housing; A rotational conveyor installed to selectively supply the wire rod coil discharged from the laying head to the lower housing and the upper housing; And a rotational conveyor installed to guide the wire coil discharged from the lower housing and the upper housing to the reforming tube. The rotating conveyor is provided with a plurality of rotational conveyor along the direction of the wire rod coil, the neighboring ones are rotatably installed, the chain is installed to move in an endless track in the form surrounding the upper and lower parts of the table, and the drive motor connected to drive the chain And, consisting of a rotating means for rotating the table, The rotating means is a multi-layer heat treatment apparatus for a wire coil, characterized in that the motor, and a worm and a worm gear connected to convert the rotational force of the motor to the vertical rotation of the table. The multilayer heat treatment apparatus of claim 1, wherein the lower housing is configured to be heated by a heating coil that generates heat by supply of power. The apparatus of claim 1, wherein the upper housing is configured to receive blowing air generated by a blower. delete delete 2. The apparatus of claim 1 further comprising a spring coupled to exert an elastic repulsive force to pivot the neighboring table to a predetermined position, and a turnbuckle coupled to pivot the neighboring table in a direction opposite to the rotational direction of the spring. Multilayer heat treatment apparatus of the wire coil.

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