JP2668715B2 - Cutting control method in coil focusing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting control method in a coil concentrator for a wire rod, and more particularly to a cutting control method for producing a half coil.

[Conventional technology and its problems]

In general, a direct heat treatment method is known in which the heat retained by the rolled wire rod is used for the heat treatment at the final stage of the rolling process of the wire rod. For example, in the direct heat treatment method called vertical loop method, the wire rod that comes out of the rolling mill is formed into a coil standing vertically by a horizontal laying type winder, and in this state it is carried in a state where it does not polymerize by a vertical conveyor. Go. At this time, the wire rod is heat-treated by natural or forced cold air, and then is horizontally lowered on a table roller or a feed chain, introduced into the coil concentrating device, and converged.

As an example of this coil focusing device, a focusing tab (tub)
, A centering mandrel provided at the center of it, a horizontal plate that goes in and out at the upper and lower middle of the convergence tab, a positioning arm that goes in and out at the lower side of this horizontal plate, and a wire rod is scraped and pressed by this positioning arm. And a cutting machine (tab shear) for clipping
There is known a coil focusing device composed of (Japanese Patent Publication No. 51-29).
(See Publication No. 14). And in such a coil focusing device,
Since the feed chain is temporarily stopped, the hanging wire is scraped off by the positioning arm and cut by the tab shear, so it is possible to cut without tangling the wire.
It has been.

Further, as another example, since the rectifying mandrel is divided into upper and lower two stages and the upper deciding mandrel is always placed in an upper position, the upper deciding mandrel is swung in a vertical plane to move in and out. There has been known a coil focusing device in which a plurality of coil holding arms are alternately supported by an ascending and descending lower centering bouncer (Japanese Patent Publication No. 49-6476). Further, in such a coil focusing device, since the upper centering mandrel is always in a fixed position, the coil filling rate (coil packing form) becomes constant,
Moreover, it is said that the wire rod continuously coming out of the finish rolling mill can be smoothly formed into a coil and taken out intermittently.

By the way, by using the latter coil concentrating device, from a full coil to a half coil (if the full coil is 2 tons,
In order to produce 1 ton of half coil, when trying to cut a wire with a tab shear using a positioning arm, the tab shear cannot operate because the coil holding arm is a mechanism that swings in a vertical plane.

Therefore, when the coil holding arm is replaced by a diaphragm mechanism (iris) capable of swinging in a horizontal plane, the following new problems occur.

In order to describe this in detail, first, the entire coil concentrator will be described. In FIG. 4, the wire 4 is composed of a table roller 1 (second conveyor) and a feed chain 2 (second conveyor) located below the table roller 1 (second conveyor). 1) and a conveyor 3 composed of a conveyor 1 and a conveyor 3 which are unrolled and are spirally developed and conveyed to be introduced into the convergence tab 5. At the center of the convergence tab 5, a divided upper centering mandrel 6 and a divided lower centering mandrel 7 are arranged, and an iris 8 described later is provided immediately below the convergence tab 5, and the iris 8 is described below. A tab shear made up of a plurality of positioning arms 9 is provided immediately below. Further below is provided a coil chamber 10 composed of a plurality of pins, and a coil plate 11 at the center thereof.
The lower constant-centering mandrel 7 having the above is arranged.

Next, the iris 8 will be described. The iris 8 is composed of six sickle-shaped coil holding arms 12, 12,... As shown in FIG. Two
From the dashed line to the position of the solid line, it enters and exits immediately below the convergence tab 5. That is, these sickle-shaped coil holding arms 12 are pivotally supported by their bases 13, and the base 13 of one of the coil holding arms 12 is integrally formed on a swingable substrate 14. Mounted, this substrate 14 is connected to the rod of a hydraulic cylinder 15. Also this board
14 is also connected to one end of a push-pullable first connecting rod 16, and the other end of the first connecting rod 16 has another coil holding arm 12
It is connected to a rotating lever 17 for rotating the base 13 and is also connected to a second connecting rod for pushing and pulling the next connecting rod.

The coil focusing device provided with the iris 8 is suitable for producing a half coil. That is, the wire rod 4 spirally conveyed by the conveyor 3 is focused in a coil shape and is passed through the focusing tab 5 to the coil chamber.
10 will be introduced. At this time, the upper constant-centering mandrel 6 has a large diameter and is supported by the lower constant-centering mandrel 7.

In this state, in order to produce a half coil, a command to close the iris is issued. That is, when the hydraulic cylinder 15 is operated, the coil holding arm 12 enters the focusing tab 5 through the base plate 14 as shown by the solid line in the third illustration. At the same time, the lower constant-centering mandrel 7 starts descending. As a result, the upper centering bouncer 6 placed on the lower centering bouncer 7 is replaced by the tip of the coil holding arm 12 and supported. as a result,
The coils are sorted up and down. Next, when the lower centering mandrel 7 descends to a position where it does not interfere with the rotation of the positioning arm 9, the positioning arm 9 scrapes the wire rod and cuts it with a tab shear (not shown).

However, in the cutting by such a coil concentrating device, when cutting by a tab shear, as shown in FIG.
When the iris 8 is closed while being caught by the individual coil holding arms 12, the wire 4 hangs down in a loop 4a. In this state, when the plurality of positioning arms 9 scrape the wire 4 and cut it with a tab shear. , Multiple cut pieces,
It becomes so-called double cutting. As a result, the product yield is reduced.

In particular, when the wire rod 4 is carried in the slow cooling mode, the spiral of the wire rod 4 becomes dense and is introduced into the focusing tab 5 on the conveyor 3, so that the coils are not sorted by the iris 8. Therefore, the double-cutting described above frequently occurs.

[Means for solving the problem]

Therefore, the present invention was created in order to solve such a problem, and the gist of the invention is to develop a wire rod coming out of a finishing rolling mill in a spiral shape on a conveyor by a horizontal laying type winding machine. In a coil concentrating device that conveys and conveys to a focusing tab and forms a coil, a first conveyor that faces the conveyor at least to the focusing tab;
And a second conveyor having a step above the conveyor, and a plurality of coil holding arms are horizontally swung just below the focusing tab so that the coil can be moved in and out immediately below the focusing tab, and the coil and the upper stage can be moved. In the coil concentrating device provided with an iris for supporting the stabilizing mandrel and having a tab shear immediately below the iris, the first conveyor is temporarily stopped, and then the iris is closed, while the lower centering mandrel is closed. The cutting control method in the coil focusing device is characterized by lowering the pressure and then operating the tab shear.

〔Example〕

The configuration of the present invention will be described in detail together with its action in the embodiment apparatus shown in the accompanying drawings.

FIG. 1 is a conceptual diagram showing an example of an apparatus for carrying out the present invention,
FIG. 2 shows the operation diagram of FIG. 1, and the same reference numerals as in FIG. 4 denote the same reference numerals, and a description thereof will be omitted.

In the full coil production equipment according to the present invention, in order to switch to the half coil production, the iris 8 is instructed to be closed at an appropriate point in the coil forming process, but before the instruction is issued, the feed chain 2 of the conveyor 3 is moved for several seconds. Stop it. As a result, it is carried from the table roller 1.
The spirally developed wire 4 is stored on the feed chain 2 (see FIG. 1). At that time, the table roller 1
Since there is a step between the feed chain 2 and the feed chain 2, a certain amount of wire material due to polymerization is stored.

As a result, the number of the hanging wire rods 4b in the focusing tab 5 is surely only one, so that such a state (the first conveyor 3
If the iris 8 is closed one second after the stop of the operation), the coils can be surely sorted.

Next, one second before the first conveyor 3 is activated, the lower constant-centering mandrel 7 is lowered (see FIG. 2), and then the wire 4 is cut by a scraping tab shear.

In the present embodiment, the cutting control method when producing a half coil from a full coil production facility has been described, but the present invention is not limited to this, and a 1/3 coil from a full coil or an arbitrary amount of coils is produced. Needless to say, it can be converted in any case.

〔The invention's effect〕

According to the present invention, when a half coil or the like is produced by a full coil production facility, the iris is used for sorting. Therefore, the sorting is easy, and the spiral wire is guided to the focusing tab before the iris is closed. Since the first conveyor to be stopped is temporarily stopped, the iris can be reliably sorted, and double cutting by the tab shear can be eliminated. Therefore, the production yield can be improved.

[Brief description of the drawings]

1 is a conceptual diagram of an example of an apparatus for carrying out the present invention, FIG. 2 is an operation diagram of FIG. 1, FIG. 3 is a bottom view of an iris, and FIG. 4 is an operation diagram of a conventional example. 1 ... Table roller, 2 ... Feed chain, 3 ...
... first conveyor, 4 ... wires, 5 ... focusing tab, 6 ...
… Upper tier decentering bouncer, 7 …… Bottom tier decentering bouncer, 8 ……
Iris, 12 ... Coil holding arm.

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-57-6908 (JP, A) JP-A-59-144524 (JP, A) Actual opening 61-36312 (JP, U) Actual opening Sho-56- 175137 (JP, U) JP 48-42345 (JP, B1) JP 45-11651 (JP, B1) JP 54-10749 (JP, B2)

Claims (1)

(57) [Claims] 1. A coil focusing device for spirally developing and carrying a wire rod coming out of a finish rolling mill with a horizontal laying type winding machine by a sonveyor and introducing it into a focusing tab to form a coil, The conveyor comprises at least a first conveyor facing the focusing tab, and a second conveyor having a step above the first conveyor, and a plurality of coil holding arms are horizontally provided directly below the focusing tab. A coil focusing device having an iris swingable to and from which it can be moved in and out immediately below a focusing tab and supporting a coil and a centering mandrel of an upper stage, and a tab shear provided directly below the iris. Cutting the lower concentric mandrel while closing the iris, and then operating the tab shear after closing the conveyor. Law.