JPS6119691B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a direct heat treatment apparatus for rolled wire rods.
The spiral coils discharged from the loop forming machine are securely held and transported one by one so that the loop portions do not overlap.

Direct heat treatment of the rolled wire rod from the final hot rolling mill involves forming it into a helical coil using a loop forming machine, and then transporting it in a forward-inclined position by a predetermined angle. This is done by spraying a refrigerant onto the surface. 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-inclined state with the pitch P between each loop and the inclination angle α relative to the horizontal axis H maintained within a certain range, and is conveyed to the right in FIG. During this conveyance, the spiral coil 3 is regulated 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. It can be done.

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. 6, the conveyor 8 and the side conveyor 4 are tilted to a predetermined angle α, but this is mechanically very complicated, and even if it could be realized mechanically, it would be costly. In addition to the increased costs, concerns remain regarding equipment reliability, operational stability, etc.

Furthermore, it is very difficult to reliably catch each loop portion of the helical coil 3 discharged from the loop forming machine 2 one by one by the claws 5 of the side conveyor 4. That is, as shown in FIG. 2, it is impossible to bring the coil discharge port 2a formed by the guide pipe of the loop forming machine 2 and the position of the claw 5 of the side conveyor 4 close to each other dimensionally, so that the loop part falls freely ( The claws 5 can only catch the helical coil 3 while the coil is moving (moving), which may cause interference between the claws 5 and the loop portion or a catching error.
This is because the loop part of the helical coil 3 is not aligned at the proper catching position 9 due to variations in the rotational speed of the loop forming machine 2 or because the loop part to be caught may be pulled by the previous loop part. It is.

The present invention was provided for the purpose of solving these conventional problems, and is characterized by forming a hot-rolled wire rod into a helical coil using a loop forming machine. In the direct heat treatment device for rolled wire rods, which performs forced cooling while conveying the helical coil in a forward-inclined position, a conveyor conveys the helical coil discharged from the loop forming machine so as to fold it and form a predetermined pitch; A hanger having a large number of hooks spaced at equal intervals in the conveyance direction, and each loop portion of the spiral coil protruding from the terminal end of the conveyor in the conveyance direction is hooked one by one by the hooks, held, and conveyed. conveyor and
The hanger conveyor includes a bed conveyor that receives the spiral coil so that the loop portion hooked by the hook assumes a predetermined forward tilted posture, and a release means for removing the loop portion from the hook at the terminal end of the hanger conveyor.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. In FIGS. 3 to 5, reference numeral 10 indicates a rolled wire rod hot-rolled in a finishing mill, and reference numeral 11 indicates a helical coil 12 continuous with the rolled wire rod 10. The spiral coil 12 is rotatably supported around an inclined axis so that the spiral coil 12 discharged from the coil 12 is tilted forward. 13 is a water cooler, and 14 is a pinch roller. Reference numeral 15 denotes a front conveyor, which is provided on the coil discharge side of the loop forming machine 11, and is for sequentially conveying the helical coils 12 discharged from the loop forming machine 11 by tilting them forward and aligning them at a predetermined pitch. It is. In addition, this front conveyor 1
In addition to being constituted by a pair of left and right chain conveyors, 5 can also be constituted by a roller conveyor or the like. A pair of left and right support conveyors 16 are provided outside the terminal end of the front conveyor 15 to support the spiral coil 12 on the front conveyor 15 so that it projects in the conveyance direction. A presser roller 17 is provided above the end of the preconveyor 15 to ensure complete ejection. Each support conveyor 16 is composed of a plurality of rollers, and the distance between the left and right sides in the conveyance direction is set large so as to allow the loop portion 12a of the spiral coil 12 to fall in the conveyance direction. Reference numeral 18 denotes a hanger conveyor, which has a pair of left and right chains 21 suspended between sprockets 19 and 20, and each chain 21 is provided with a large number of hooks 22 at equal intervals. Each chain 21 is a chain rail 2 supported by a fixed frame 23 as shown in FIG.
A hook 22 is attached to each chain 21 via a mounting bracket 25. The hooks 22 are for hooking each loop portion 12a of the helical coil 12 protruding from the front conveyor 15 in the conveying direction, one by one, and the hooks 22 are rotatably supported by the mounting bracket 25. In addition, an engaging portion 26 and a cam driven portion 27 are bent into an L shape at both ends with a phase difference of about 90 degrees, and the hook 22 has an engaging portion 26 facing in the conveying direction. Helical spring 28
is energized by. The tip of the engaging portion 26 is formed into a spherical shape as shown in FIG. 8, so that the loop portion 12a of the helical coil 12 can be reliably hooked one by one without damaging it. A release means 29 is provided at the terminal end of the hanger conveyor 18 for removing the loop portion 12a of the helical coil 12 from the hook 22.
is provided. The release means 29 is composed of, for example, a cam plate 30, etc., and this cam plate 30 is provided on the fixed side at a position where the cam driven portion 27 of the hook 22 passes, and the engaging portion is released by contact with the cam driven portion 27. 26 are configured to rotate inwardly by about 90 degrees relative to each other as shown in FIG. Reference numeral 31 denotes a bed conveyor provided below the hanger conveyor 18, which consists of a pair of left and right chains 34 suspended between sprockets 32 and 33. It is for receiving and transporting. The bed conveyor 31 is provided with a vertical adjustment means 35 so that the loop portion 12a assumes a predetermined forward tilted posture. The vertical adjustment means 35 is a screw shaft 3 fixed to the frame 36 of the bed conveyor 31.
7, a worm gear 38 which is screwed onto this screw shaft 37 and supported only rotatably, and a worm 39 which engages with this worm gear 38. Note that the chain 34 is provided with an uneven portion for preventing slipping. 40 is a guide plate that guides the loop portion 12a falling from the front conveyor 15 onto the bed conveyor 31. Reference numeral 41 denotes a relay conveyor that transports the spiral coil 12 that has come off the hanger conveyor 18 in a horizontal state, and an accumulation device 42 is provided at the terminal end of this relay conveyor 41. Accumulator 42
is for stacking and accumulating the spiral coils 12 vertically, and a discharge conveyor 43 is provided below this accumulating device 42. A blower 44 blows air or a refrigerant such as air and mist onto the helical coil 12 being conveyed from below, and is provided below the bed conveyor 31.

Next, the effect will be explained. When the rolled wire rod 10 that has been finish rolled in the finishing mill is supplied to the loop forming machine 11 via the water cooler 13 and the pinch rollers 14, the loop forming machine 11 rotates at a rotational speed commensurate with the wire rod speed, and the rolling The wire rod 10 is formed into a helical coil 12 of a predetermined diameter, and the helical coil 1
2 are sequentially discharged from the discharge side. This spiral coil 12 falls forward and is laid down on the front conveyor 15, so it is conveyed by the front conveyor 15 while being aligned at a predetermined pitch, and at the end, it is turned toward the conveying direction side. Make it stand out. When the helical coils 12 protrude from the front conveyor 15, the ends of the protruding loop portions 12a are hooked one by one by the hooks 22 of the hanger conveyor 18 to be held and conveyed. At this time, the hooked loop part 1
The rear end side of the coil 2a falls onto the bed conveyor 31 along the guide plate 40 and is supported thereby. It is transported while being held in a forward tilted position (α = 30 to 60 degrees). During this transportation, coolant is supplied from the blower 44 to perform controlled cooling. Next, when the terminal end of the hanger conveyor 18 is reached, the cam driven part 27 of each hook 22 contacts the cam plate 30, and the hook 22 rotates inward against the spring 28, so that the loop part 12a is removed from the hook 22, and the helical coil 12 is successively laid down onto the relay conveyor 41. After passing through the cam plate 30, the hook 22 is returned to its original state by the spring 28. The spiral coil 12 on the relay conveyor 41 is the accumulator 4
2, where they are accumulated in predetermined amounts and then carried out by a carry-out conveyor 43.

The inclination angle of the helical coil 12 during conveyance is adjusted as appropriate by vertically moving the bed conveyor 31 using the vertical adjustment means 35 and changing the distance from the hanger conveyor 18.

If regulated cooling is not required, the hanger conveyor 18 is stopped. Then, the helical coil 12 that has passed through the front conveyor 15 goes into a protruding state and sequentially falls downward and is transferred onto the bed conveyor 31, so that it can be conveyed by the bed conveyor 31 in a fallen state.

Note that the cam plate 30 of the release means 29 can be provided so as to be freely changeable in position along the conveying direction, and in that case, the release position can be adjusted as desired. Further, the release means 29 may have a configuration other than that in the embodiment.

As described in detail in the embodiments above, in the present invention, the spiral coils discharged from the loop forming machine are not caught in a fallen state, but are caught in a state in which they are laid down on a conveyor, so it is possible to easily and reliably capture one coil at a time. can be caught. Further, since it is not necessary to tilt the loop forming machine more than necessary, it is possible to prevent an increase in equipment cost, a decrease in rolling speed, etc. Since the helical coil is transported with the upper part of the loop portion hanging from the hook, the loop portion does not come off from the hook during transportation. In particular, even if the hook is short, the loop portion will not come off from the hook due to deformation of the loop portion due to creep deformation or the like. Furthermore, even if there is a disturbance in the loop shape at the start or end of the coil, especially at the end, the coil can be conveyed while leaning on the previous suspended loop.Also, since there is no side conveyor, costs are reduced and Maintenance is easy, and there is no fear that the starting end, ending end, etc. of the coil will get caught during transportation. It is possible to catch the loop part in a state where the relative speed between the loop part and the hook is zero, and it is possible to prevent the coil from being damaged. In addition, since the loop forming machine is designed to catch during transportation rather than near the discharge port, in the unlikely event that
Even if a catching mistake occurs, the wire rod 10
It is extremely safe as there is no need to worry about the liquid going out of line, and post-processing is simple, requiring only a minimum amount of line stoppage.

[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 an enlarged plan view showing the catching state, FIGS. 3 to 8 illustrate one embodiment of the present invention, and FIG. 3 is an overall side view, Figure 4 is a view taken along the line A-A in Figure 3, Figure 5 is an enlarged view taken along line B-B in Figure 3, Figure 6 is an enlarged view of the main parts, and Figure 7 is a perspective view of the hook. , FIG. 8 is a sectional view of the same. 10...Rolled wire rod, 11...Loop forming machine, 1
2...Spiral coil, 15...Pre-conveyor, 1
8...Hanger conveyor, 22...Hook, 29
...Release means, 31...Bed conveyor, 35...
...Vertical adjustment means.

Claims (1)

[Claims] 1. In a direct heat treatment device for rolled wire rods, in which a hot 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 while being forcedly cooled, the wire rod is discharged from the loop forming machine. A conveyor that transports a spiral coil at a predetermined pitch by folding it down, and a spiral coil that has a large number of hooks spaced at equal intervals in the transport direction and that protrudes from the terminal end of the conveyor in the transport direction. A hanger conveyor that hooks and holds each loop portion one by one with the hooks for conveyance; a bed conveyor that receives a spiral coil so that the loop portions hooked by the hooks are in a predetermined forward-inclined posture; and a hanger conveyor. A device for direct heat treatment of rolled wire rods, comprising a release means for removing the loop portion from the hook at the terminal end of the rod.