JP3312431B2 - Wire coil heat treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment apparatus for a wire coil, and more particularly to a heat treatment apparatus for carrying out a heat treatment while conveying a wire coil having an eccentric overlapped wire loop in which wire loops are shifted.

[0002]

2. Description of the Related Art Generally, as a heat treatment apparatus for the above-mentioned eccentrically superposed wire coil (hereinafter simply referred to as wire coil),
A roller hearth type heat treatment furnace is used. Conventionally, a wire coil is directly placed on a hearth roller and heat treated while being conveyed in the furnace. For this reason, the heated and softened wire coil is liable to be scratched or scratched, and it is easy for the coil to hang down from the gap between the hearth rollers and fall or get caught on the rollers. This greatly affected the hot rolling process of the wire coil and the subsequent process after the heat treatment, and hindered the smooth operation of the entire wire production line.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which the wire coil is prevented from being damaged, and the wire coil is caught and dropped in the heat treatment furnace. It is an object of the present invention to provide a heat treatment apparatus that can prevent the heat treatment.

[0004]

According to the present invention, there is provided a heat treatment apparatus for a wire coil, comprising:
A heat treatment furnace comprising a plurality of skids for supporting a part of the continuous wire rod coil, a roller conveyor for arranging the skids in the furnace length direction and conveying the skid from an inlet portion to an outlet portion of the furnace body, and a lower portion of the furnace body. A skid return conveyor extending in the longitudinal direction of the furnace body, a charging conveyor disposed at a position separated from the roller conveyor and supplying the wire rod coil, and a lower side of the charging conveyor. A skid supply conveyor having a skid mounting surface moving toward the rear end of the roller conveyor, a skid supply transfer device for transferring the skid from the skid return conveyor onto the skid supply conveyor, and the roller conveyor An extraction-side conveyor that is disposed at a distance from the extraction-side coil to extract the wire coil; And Sukitsudo takeout conveyor having Sukitsudo mounting surface to aerodrome moves below the extraction side conveyor,
A skid unloading and transferring device for transferring skids from the skid unloading conveyor onto the skid return conveyor;
A wire coil guide disposed at the rear end of the extraction-side conveyor and extending obliquely upward from the upper side of the skid loading surface of the skid take-out conveyor toward the rear end, and placed side by side on the skid supply conveyor; After the wire coil transferred from the charging conveyor onto the skid is heat-treated in the heat-treating furnace, the used skid is circulated from the skid take-out conveyor to the skid supply conveyor via the skid return conveyor. It is characterized in that it is made to be.

[0005] In the present invention, the front side refers to the conveying direction of the wire coil, and the rear side refers to the opposite direction.

In the wire coil heat treatment apparatus according to the present invention, it is preferable that a recess having a size through which the wire coil guide passes when the skid is transferred from the roller conveyor to the skid take-out conveyor is provided on the front side of the skid.

[0007]

According to the wire coil heat treatment apparatus of the present invention,
The eccentrically overlapped wire loop-shaped wire coils stacked with the wire loops shifted are transferred from the loading conveyor onto the skids placed side by side on the skid supply conveyor, and one wire coil is mounted on a plurality of skids. And heat-treated while being conveyed in a heat treatment furnace by a roller conveyor. Since the wire coil is supported by a skid, it can be prevented from hanging between the rollers of the roller conveyor and being caught or dropped by the rollers, and does not directly contact the rollers, so that the wires are scratched or scratched by the rollers. Nothing.

[0008] The wire coil after the heat treatment is transferred from the skid to the extraction conveyor via the wire coil guide and supplied to the next step. The skid is placed on the skid take-out conveyor, separated downward from the wire coil, and transferred to the skid return conveyor by the skid take-out transfer device.
It is returned in the rearward direction and is transferred onto a skid return conveyor by a skid supply / transfer device, and is used for loading a new wire coil and heat-treating, and thereafter is circulated and used in the same route.

In the present invention, if a concave portion is provided on the front side of the skid to allow the wire coil guide to pass when the skid is transferred from the roller conveyor to the skid take-out conveyor, the longitudinal length of the skid is long. Even in the case of a skid or when the rigidity of the wire coil after heat treatment is small, the tip of the wire coil guide can be arranged close to the roller conveyor, and the wire coil guide ensures that the wire coil does not interfere with the skid. It can be guided on the extraction conveyor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the whole apparatus, and 1 is a heat treatment furnace, which is composed of a heating chamber 1a and a cooling chamber 1b, and has a roller conveyor 3 for conveying a heated object from an inlet 2a to an outlet 2b of a furnace body 2. In addition, a heater 4 is provided in the heating chamber 1a as shown in FIG. Reference numeral 5 denotes a skid returning conveyor provided below the furnace body 2 and extending in the longitudinal direction of the furnace body. In this embodiment, a roller conveyor type is used. Reference numeral 7 denotes an eccentrically superposed wire loop-shaped wire coil which is stacked with the wire loop shifted.

Reference numeral 10 denotes a charging side conveyor which is connected to a wire rod hot rolling line (not shown) and supplies the wire coil 7 to the heat treatment furnace 1. The front end of the conveyor 10 is a predetermined distance from the rear end of the roller conveyor 3 of the heat treatment furnace 1. It is located at a distance. Numeral 15 denotes a skid for supporting a part of the continuous wire coil 7, which has a breathability in which a bar is framed in a grid as shown in FIG. At the time of transfer onto the take-out conveyor 40 (described later),
A recess 16 is provided which is large enough for the wire coil guide 35 (see FIG. 5) to pass therethrough.

Reference numeral 20 denotes a chain conveyor type skid supply conveyor having a skid mounting surface 21 which moves obliquely upward from below the loading conveyor 10 toward the rear end of the roller conveyor 3. 25 is a skid return conveyor 5
A skid feeding and transferring apparatus for transferring the skid 15 onto the skid feeding conveyor 20 from above, comprising a table lifter having a drive roller conveyor 26 on the upper surface.

An extraction side conveyor 30 for extracting the wire rod coil 7 has a rear end located at a predetermined distance from the front end of the roller conveyor 3 of the heat treatment furnace 1. Numeral 40 denotes a chain conveyor type skid take-out conveyor, which has a skid mounting surface 41 which moves obliquely downward from the front end of the roller conveyor 3 to below the extraction conveyor 30.

Reference numeral 35 denotes a wire coil guide fixed to a support rod 36 fixed to the rear end of the extraction-side conveyor 30. The tip 35a of the wire-coil guide extends from the skid mounting surface 41 of the skid take-out conveyor 40 to the thickness of the skid 15. Are separated by an amount corresponding to the extra dimension, and the upper surface thereof is located on the extraction side conveyor 30.
Is inclined obliquely upward toward the mounting surface 31.

Reference numeral 45 denotes a skid take-out / transfer device for transferring the skid 15 from the skid take-out conveyor 40 to the skid return conveyor 5, and comprises a table lifter having a drive roller conveyor 46 on the upper surface.

Next, the wire coil heat treatment apparatus 50 having the above-described structure is used.
Will be described. The skid 15 is transferred from the skid return conveyor 5 to the skid supply conveyor 20 by the skid supply and transfer device 25 and has a predetermined interval P
(See FIG. 3), they are arranged on the skid mounting surface 21 and are continuously transported in the arrow X direction. The wire coil 7 is supplied onto the skid 15 from the loading side conveyor 10, and one wire coil 7 is heat-treated while being transported in the heat treatment furnace 1 while being supported by the plurality of skids 15. .

At this time, since the wire coil 7 is mounted on the skid 15 and does not directly contact the roll of the roller conveyor 3, there is no occurrence of scratches or scratches due to contact with the roll. Also, the wire coil 7 softened by heating in the heating chamber 1a is supported by the skid 15 without relative movement, so that it is possible to prevent an accident in which the wire is hung between the rollers and falls or falls on the rollers.

As shown in FIG. 4, the wire coil 7 after the heat treatment is guided by a wire coil guide 35, extracted onto the extraction-side conveyor 30, and conveyed to the next process side.
The skid 15 is separated from the wire coil 7 by being placed on the skid take-out conveyor 40, transferred by the skid take-out device 45 onto the skid return conveyor 5 and conveyed in the direction of the arrow Y, and used for supporting a new wire coil 7. Used for circulation.

When the above-mentioned skid 15 is transferred onto the skid take-out conveyer 40, the wire coil 7 is moved to the cooling chamber 1.
As shown in FIG. 4, the skid 15 passes over the upper sprocket 42 of the skid take-out conveyor 40 since the temperature in the cooling b is lowered to, for example, about 100.degree. Until it passes, the rear end portion is pressed downward by the wire rod coil 7 and moves forward in a substantially horizontal state. After passing through the upper sprocket 42, as shown in FIG. Will be transferred. At this time, since the skid 15 is provided with the concave portion 16 large enough to allow the wire coil guide 35 to pass through, the interference between the skid 15 and the wire coil guide 35 is prevented.

In order to place the skid 15 on the skid feed conveyor 20 and thus on the roller conveyor 3 of the heat treatment furnace 1 at a predetermined interval P, the speed of these conveyors is relatively low. On the other hand, the skid return / transfer device 45 and the skid supply / transfer device 25 are set to appropriate high / lower speeds and conveyor speeds, and the skid return conveyor 5 is set to partially increase the conveyor speed. What is necessary is just to set the transport speed of each part.

The present invention is not limited to the above embodiment. For example, a conveyor other than the roller conveyor 3 of the heat treatment furnace 1 may be of a type other than those described above, or a skid supply / transfer device 25 and skid take-out. Transfer device 4
5 may be of a type other than the table lifter.

The wire coil guide 35 has a plate shape,
The skid 15 may not be provided with the concave portion 16 if the skid 15 has a short length in the front-rear direction or if the rigidity of the wire coil is sufficiently large.

[0023]

As described above, according to the present invention,
The wire coil is placed on a plurality of circulating skids and heat-treated while being conveyed in a heat treatment furnace by a roller conveyor, so that the wire coil does not directly contact the rollers of the roller conveyor, and the roller coil does not contact the rollers. In addition to preventing the wire coil from being scratched or scratched by the contact of the wire, the wire coil can be prevented from being caught and dropped in the heat treatment furnace due to the wire coil falling down between the rollers.

[Brief description of the drawings]

FIG. 1 is a device layout (partially cutaway front view) of a wire coil heat treatment apparatus showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a longitudinal sectional view of a device at a furnace entrance portion in FIG.

FIG. 4 is a longitudinal sectional view of a device at a furnace outlet part in FIG. 1;

FIG. 5 is a perspective view of a portion B in FIG.

FIG. 6 is a perspective view of the skid in FIG. 5;

FIG. 7 is an enlarged vertical sectional view of a portion B showing the behavior of the skid in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat treatment furnace, 2 ... Furnace body, 2a ... Inlet part, 2b ... Outlet part, 3 ... Roller conveyor, 5 ... Skid return conveyor,
7 ... wire rod coil, 10 ... loading side conveyor, 15 ... skid, 16 ... recess, 20 ... skid supply conveyor, 21 ...
Skid mounting surface, 25 ... Skid supply and transfer device, 30 ...
Extraction side conveyor, 35: wire coil guide, 40: skid take-out conveyor, 41: skid mounting surface, 45: skid take-out transfer device, 50: wire coil heat treatment device.

Claims (2)

(57) [Claims] 1. A heat treatment apparatus for a wire coil having an eccentric overlapped wire loop shape in which wire loops are displaced and stacked, wherein a plurality of skids for supporting a part of the continuous wire coil are provided. A heat treatment furnace provided with a roller conveyor that is arranged and conveyed from an inlet portion to an outlet portion of the furnace body, a skid return conveyor provided below the furnace body and extending in the longitudinal direction of the furnace body, and separated from the roller conveyor. A feeding conveyor arranged at a position for supplying the wire coil, a skid feeding conveyor having a skid mounting surface moving from below the feeding conveyor toward a rear end of the roller conveyor, and the skid. A skid supply / transfer device for transferring the skid from the return conveyor onto the skid supply conveyor, and separated from the roller conveyor; An extraction conveyor disposed at a position for extracting the wire coil, a skid extraction conveyor having a skid mounting surface moving downward from the front end of the roller conveyor to the extraction conveyor, and from above the skid extraction conveyor. A skid take-out / transfer device for transferring a skid onto the skid return conveyor; and a skid take-out conveyor disposed at a rear end of the extraction side conveyor and obliquely upwardly from above a skid mounting surface of the skid take-out conveyor toward the rear end. A wire coil guide that extends from the loading conveyor and heat-treats the wire coil transferred from the loading conveyor onto the skid placed side by side on the skid supply conveyor in the heat treatment furnace. Circulating from the skid take-out conveyor to the skid supply conveyor via the skid return conveyor Wire coil heat treatment apparatus, wherein was Unishi. 2. A wire coil heat treatment apparatus according to claim 1, wherein a recess having a size through which the wire coil guide passes when the skid is transferred from a roller conveyor to a skid take-out conveyor is provided on a front side of the skid.