JPS6119692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a direct heat treatment apparatus for rolled wire rods.
When the helical coil discharged from the loop forming machine is conveyed in an inclined state by the conveyor, the helical coil can be easily and reliably transferred between the loop forming machine and the conveyor with an extremely simple configuration. It was designed so that it could be carried out.

Direct heat treatment of the rolled wire rod from the final hot rolling mill involves forming a spiral coil in a loop forming machine, and then spraying a refrigerant onto the spiral coil while transporting it through a bed and side conveyor. It is done by Regarding this direct heat treatment method, several techniques have already been proposed and put into practical use, one example of which is shown in FIG.

That is, in FIG. 1, a rolled wire 1 supplied from a final hot rolling mill is formed into a spiral coil 3 by a loop forming machine 2 rotating around a horizontal axis, and is formed into a spiral coil 3 by a claw 5 provided on a side conveyor 4. etc., the sheet is placed on the bed conveyor 6 in a forward tilted state with the pitch P between each loop and the inclination angle α relative to the horizontal axis H being maintained within a certain range, and is conveyed to the right in FIG. 1I. During this conveyance, the spiral coil 3 is controlled and cooled by a refrigerant 7 such as air supplied from the bottom to the top of the bed conveyor 6, thereby performing direct heat treatment using the temperature immediately after rolling. .

In order to obtain a product with uniform strength (similar to lead patenting) in such controlled cooling during transportation, the spiral coil 3 discharged from the loop forming machine 2 must be tilted 30 to 60 degrees with respect to the horizontal axis, and ,
It is necessary to convey the rolled wire rod 1 while keeping the pitch between each loop at least four times the diameter of the rolled wire rod 1. However, as shown in FIG. 1, it is very difficult to tilt the helical coil 3 discharged vertically from the loop forming machine 2 while being conveyed by the conveyors 4, 6. That is, conventionally, another conveyor 8 is provided between the discharge port of the loop forming machine 2 and the bed conveyor 6, and this conveyor 8 is driven slower than the other conveyors 4 and 6, so that the spiral coil 3 is connected to the bed conveyor 6. The conveyor 8 and the side conveyor 4 are tilted to a predetermined angle α before the conveyor 8 and the side conveyor 4 get on the conveyor, but this is mechanically very complicated, and even if it could be realized mechanically, it would be expensive. In addition, concerns remain regarding equipment reliability, operational stability, etc.

In view of these conventional problems, the present invention is designed so that a spiral coil is discharged from a loop forming machine in a forward tilted position during conveyance. In a direct heat treatment device for rolled wire rods, a coil discharge angle is used in a direct heat treatment device for rolled wire rods, in which a rolled wire rod is formed into a helical coil by a loop forming machine, and the helical coil is conveyed in a forward tilted position by a bed and a side conveyor while being forcedly cooled. The loop forming machine, the bed, and the side conveyor are relatively inclined so that the angle is approximately equal to the conveying angle of the helical coil.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 2 and 3, 10 is a finishing rolling mill, and 11 is a rolled wire rod hot-rolled to a predetermined size by the finishing rolling mill 10. 12 is a water cooler, and 13 is a pinch roller. 14 is a loop forming machine for forming the rolled wire 11 into a helical coil 15, and is rotatably installed around an inclined axis so that the discharge angle β of the helical coil 15 is approximately equal to the conveyance angle α described later. It is being Bed conveyors 16 support the spiral coil 15 from below, and are arranged in pairs close to each other on the left and right sides, and the bed conveyors 16 are provided with pawls 17 at equal intervals. A pair of side conveyors 18 are provided on both the left and right sides so as to sandwich the spiral coil 15 from both sides, and each side conveyor 18 also has claws 1 at equal intervals, similar to the bed conveyor 16.
9 is provided. The bed conveyor 16 and the side conveyor 18 are configured to receive the helical coil 15 discharged from the loop forming machine 14 at substantially the same discharge angle β and convey it while maintaining a forward tilted posture. In addition, the conveyance angle α in this case is 30~30 to uniformly cool the wire.
60 degrees is appropriate, and the conveyance pitch is 1
A diameter of 4 or more times the diameter of 1 is suitable. 20 is a blower that injects air or a refrigerant such as air and mist to the spiral coil 15 during conveyance;
6 and facing upward. Reference numeral 21 denotes a conveyor for transporting the spiral coil 15 in a horizontal state, and is composed of rollers, chains, etc., and a collection device 22 is provided at the final end of this conveyor 21. The stacking device 22 is for stacking the spiral coils 15 vertically, and a conveyor 23 for conveyance is provided below the stacking device 22.

In the above configuration, the rolled wire rod 11 finished by the finishing mill 10 is bent upward through an appropriate guide device (not shown), and then supplied to the loop forming machine 14 via the water cooler 12 and the pinch rollers 13. The loop forming machine 14 rotates around the inclined axis at a rotation speed commensurate with the wire rod speed, and rotates around the inclined axis.
1 is formed into a spiral coil 15 having a predetermined diameter, and the spiral coil 15 is sequentially discharged from the discharge side at a discharge angle β. On the other hand, bed and side conveyor 1
6 and 18 are configured to convey the helical coil 15 in a forward-inclined posture at an angle α;
Since the discharge angle β of the loop forming machine 14 is set to be approximately the same, the bed and side conveyors 16 and 18 rotate the helical coil 15 at an angle α.
It is sufficient to catch it with the claws 17 and 19 while it remains tilted. Therefore, it is very easy to transfer the helical coil 15 from the loop forming machine 14 to the bed and side conveyors 16, 18, and there is no need for means for tilting the helical coil 15, and each loop portion can be It is possible to reliably catch each wire one by one, and it is possible to prevent overlapping of loop portions. The spiral coil 15 being conveyed by the conveyors 16 and 18 is controlled and cooled by supplying refrigerant from the blower 20 below, and then passed through the conveyor 21 and accumulated by the accumulating device 22, and is transferred in predetermined amounts to the conveyor. 23.

Note that if the loop forming machine 14 is tilted, there is a concern that the installation of the related rolling mill 10 etc. will be troublesome, but it is sufficient to lift the rolled wire rod 11 after the rolling mill 10 as in the embodiment. . It is also possible to install the loop forming machine 14 horizontally, and to install the conveyors 16 and 18, which transport the spiral coil 15 while regulating and cooling it, at an angle, or it is also possible to install both at an angle. be. In other words, the loop forming machine 14 and the conveyors 16, 18 should be relatively inclined so that the inclination angle of the helical coil 15 with respect to the conveyors 16, 18 and the coil discharge angle of the loop forming machine 14 substantially match. Good.

According to the present invention, the loop forming machine and the bed and side conveyor are provided so as to be inclined relative to each other, so that the helical coil discharged from the loop forming machine is delivered to the bed and side conveyor in substantially the same state. Therefore, there is no need for any means for tilting the helical coil, and delivery becomes very easy and reliable. Therefore, the equipment cost is reduced, and at the same time, the helical coil can be reliably conveyed in an inclined state, and variations in adjusted cooling can be eliminated.
Moreover, since the delivery operation is easy and reliable, the reliability of the equipment and the stability of operation are improved.

[Brief explanation of the drawing]

Figure 1 is a side view showing a conventional example;
-X arrow view, the same is a plan view, FIG. 2 is a schematic side view showing one embodiment of the present invention, and FIG. 3 is an enlarged side view of the same main part. 11...Rolled wire rod, 14...Loop forming machine, 1
5...Spiral loop, 16...Bed conveyor,
18...Side conveyor.

Claims (1)

[Claims] 1. In a direct heat treatment apparatus for rolled wire rods, the hot-rolled wire rods are formed into helical coils using a loop forming machine, and the helical coils are conveyed in a forward-inclined position by a bed and a side conveyor while being forcedly cooled. 1. An apparatus for direct heat treatment of rolled wire rods, characterized in that the loop forming machine, the bed, and the side conveyor are provided at relative inclinations so that the discharge angle is approximately equal to the conveyance angle of the helical coil.