JPS6317034B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a steel line equipped with a laser side trimmer.

[Prior art]

The steel line in conventional continuous pickling equipment is the
As shown in the figure. In the figure, 1 is a hot-rolled strip coil, 3 is a shear for cutting the end face of the strip coil, 5 is a welding machine for connecting the leading strip coil end 7 and the trailing strip coil end 6, and 8 is a pickling machine. A tank, 9 a rotary side trimmer for cutting off unnecessary parts of the outer edge of the steel plate, 10 a shear for cutting off the steel plate to a required length, and 11 a reel for winding up the steel plate.

In a conventional steel line, a strip coil 1, a shear 3, a welding machine 5, a pickling tank 8, a rotary side trimmer 9, a shear 10, and a reel 11 are installed in this order.

Note that when strip coil 1 becomes empty, strip coil 2 is selected and used. 4 is a shear for the strip coil 2. While the strip coil 2 is in use, preparation work for the strip coil 1 is carried out.

Examples of side trimming when welding a leading steel plate and a trailing steel plate having different widths using a conventional steel line are shown in FIGS. 2 and 3. first,
After welding with the welding machine 5, the ends of the plates are cut off with a notch in the welding machine 5 as shown in FIG. Next, after pickling is completed in the pickling tank 8, the ends of the boards are continuously cut off using a rotary side trimmer 9 as shown in FIG.
The reason why side trimming is performed in two stages in this manner is that when the difference in plate width is large, cutting resistance increases rapidly with only the rotary type side trimmer 9, making rapid shifting difficult.

In this way, conventional steel lines require side trimming using a welding machine, so the steel line must be stopped not only during welding but also when notching, which has the drawback of hindering the speeding up of steel lines. had.

[Summary of the invention]

The present invention eliminates the above-mentioned drawbacks of the conventional method, and in order to reduce the downtime of the steel line due to welding machines, the present invention provides a steel line with a structure in which the spacing between the two beam nozzles can be changed. A laser beam side trimmer was installed.

That is, the present invention includes a strip coil, a shear for cutting the end face of the strip coil, a welding machine for connecting the leading strip coil end and the trailing strip coil end, a pickling tank, and a variable interval between the two beam nozzles. This is a steel line equipped with a laser beam side trimmer, which is characterized by a laser beam side trimmer, a shear for cutting the steel plate to the required length, and a reel, arranged in this order.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 4 shows an embodiment of the present invention, in which a laser beam side trimmer 12 is disposed after the pickling tank 8, and a shear 10 is disposed after the laser beam side trimmer 12. It should be noted that, among other symbols, those that are the same as those in FIG. 1 are equivalent, and their explanation will be omitted.

FIG. 5 shows the structure of the laser beam side trimmer 12. The laser beam emitted from the oscillator 13 is reflected by the reflecting mirrors 14, 15, and 16, and then condensed by the lens 17 and irradiated onto the end of the steel plate 18. At this time, oxygen gas 21 is fed into 19. The nozzle 19 is mounted on a cart 22 that can move back and forth, and can move quickly on rails 23.

The state of cutting when using the laser beam side trimmer 12 is shown in FIG. In FIG. 6, 24 is a side trimming line of the steel plate.

Unlike conventional rotary type side trimmers, the laser beam side trimmer 12 does not apply force due to cutting resistance to the nozzle and is capable of high-speed cutting, making it possible to perform rapid shifts as shown in Figure 6. becomes. Therefore, notching by the welding machine 3 is no longer necessary, and the downtime of the steel line is significantly reduced. For example, the downtime caused by conventional welding machines is about 40 seconds, but trimming time is just over 10 seconds, so using a laser beam side trimmer reduces line downtime to 30 seconds.

In the above embodiment, two carts equipped with beam nozzles were used in order to make the interval between the beam nozzles variable, but the method is not limited to this method; for example, screw shafts, oil cylinders, etc. may be used. It's okay.

〔Effect of the invention〕

Since the present invention has the above-described configuration, notching with a welding machine is unnecessary, and the downtime of the steel line is significantly reduced, which has the effect of increasing the speed of the steel line.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing a conventional steel line.
Figure 2 is an explanatory diagram showing cutting with a conventional welding machine,
FIG. 3 is an explanatory diagram showing cutting off with a conventional rotary type side trimmer. FIG. 4 is a block diagram showing an embodiment of the present invention, FIG. 5 is an explanatory diagram showing a laser beam side trimmer, and FIG. 6 is an explanatory diagram showing the state of cutting when the laser beam side trimmer is used. 1, 2... Strip coil, 3, 4... Shear,
5... Welding machine, 8... Pickling tank, 10... Shear, 1
1...Reel, 12...Laser beam side trimmer.
Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A strip coil, a shear for cutting the end face of the strip coil, a welding machine for connecting the leading strip coil end and the trailing strip coil end, a pickling tank, a side trimmer, and a steel plate to the required length. In a steel line in which a shear for cutting and a reel are arranged in that order, the above side trimmer is a laser beam side trimmer equipped with two beam nozzles configured so that the interval between them can be changed. A steel line equipped with a distinctive laser beam side trimmer.