JPH03275292A - Laser beam machine - Google Patents

Abstract

PURPOSE:To enable laser machining in a simple constitution, in non-contact and on an optional path by moving a truck with a driving means in the direction intersecting a running material, and converging laser beam on the running material through the truck. CONSTITUTION:As the exciting parts of coil pieces 303 provided on a guide rail 301 are shifted in sequence, the truck 302 moves along the guide rail 301. When the laser beam from a laser beam oscillator 307 irradiates the truck 302 simultaneously with the movement of the truck 302, the laser beam is converged on a sheet 101. As the laser beam is converged on the sheet 101, the truck 302 is moved to cut the sheet 101 in the width direction. It is made possible to detect the travel speed of the sheet 101 by a speed detecting means 306, control the shifting speed at an exciting place or the travel speed of the truck 302 and the opening and closing of a shutter 308 by a controller 305, cut the sheet 101 in any direction and notch the sheet 101.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a laser processing device that processes a traveling traveling material with a laser beam, and is particularly suitable for use in cutting sheets of corrugated cardboard strips and inserting silicone into the material. It is something.

<Background technology> When manufacturing a corrugated cardboard case, base paper is fed into a corrugator to create a continuous belt-like sheet, which is then cut to a certain length and stocked as sheets. After printing is performed on the stocked sheets, they are punched out into a desired shape using a cutting die, and cuts and the like necessary for assembly are formed to perform a predetermined assembly.

Conventionally, when producing corrugated hole spaces, a continuous sum-shaped sheet 1- is printed and punched using a cutting die, and then a sheet of a certain length (this After cutting, the process was carried out against a stack of stocked sheet sheets. Due to this, the line for manufacturing cardboard cases was temporarily cut off, and the production efficiency was poor. . Corrugated holes [Generally, there are three layers of horizontal liner consisting of a front liner, a center liner, and a back liner, so if you stock sheet paper, it will warp and age over time.) For punching work. Will it have a negative impact?) Furthermore, in the past, it was necessary to match the color of the product with a cutting die, and it was also necessary to replace the cutting die each time the product was changed. For this reason, in recent years, in the production of a large number of small and large products, which has become more prevalent in lees, many cutting dies are required, and with ζC), it takes a lot of time to change out.
There were problems such as cost, bulkiness, and reduced production efficiency. Furthermore, when cutting into sheets, paper particles that are caught between the front and back liners may be scattered as paper dust, interfering with the printing process.

For this reason, a cutting device that can cut continuous strip-shaped sheets while the sheet is running is desired, but no device that can satisfy the quality of the sheet and whose cutting speed can follow the running speed of the sheet has appeared. The current situation is that they are not.

<Objective of the Invention> The present invention has been made in view of the above situation, and an object of the present invention is to provide a laser processing device that can easily process a traveling material, thereby preventing quality deterioration of the sheet. The purpose is to make it possible to manufacture corrugated cardboard sheets in a series of operations.

Means for Achieving the Object> The laser processing apparatus of the present invention for achieving the above object has the following features:
A guide rail extending in one direction intersecting the traveling direction of a traveling material traveling in one direction, a truck movably supported by the guide rail, and a driving means for driving the movement of the truck. The present invention is characterized by comprising: a single laser oscillator that emits a laser beam toward the truck; and an optical system provided on the truck to converge the laser beam onto the traveling material. ": A laser processing apparatus of the present invention for achieving the above object (a guide 1 knoll extending in one direction and intersecting with the traveling direction of a traveling material traveling in one direction, and the guide 1'
The coils and coils are arranged along the longitudinal direction of the V+7- rail, and the excitation poles are alternately different in the longitudinal direction and the excitation points are sequentially shifted in the longitudinal direction. Both of the guide rails are equipped with permanent magnets in which north and south poles are arranged alternately, and the excitation points of the coils are sequentially shifted to move the carriage along the guide rail, and a laser beam is emitted toward the carriage. lno1 oscillator,
The present invention is characterized in that the truck is provided with: 1) a light system for converging the beam onto the traveling material;

<Function> The truck moves along the guide rail by the driving means,
A laser beam emitted by a laser oscillator is focused onto a traveling material by an optical system. The convergence point of the laser beam moves along a trajectory that combines the movement of the cart and the traveling material, and the desired processing is performed on the traveling material by controlling the moving speed of the cart based on the moving speed of the traveling material.

Furthermore, by sequentially shifting the excitation points of the coils, the cart moves along the guide rails via the permanent magnets. A laser beam emitted by a laser oscillator is focused onto a traveling material by an optical system. As mentioned above, the convergence point of the laser beam moves along a trajectory that combines the movement of the cart and the moving material, and the desired processing is applied to the material by controlling the moving speed of the cart based on the moving speed of the material. Rub.

<Embodiment> FIG. 1 is a perspective view showing a case where a laser processing apparatus according to an embodiment of the present invention is applied to cutting a strip-shaped corrugated board sheet.

A guide rail 30 is installed in a direction intersecting the running direction (arrow X direction in the figure) of the strip-shaped corrugated cardboard sheet 101 as a running material.
1 extends above the seat 101, and the guide rail 30
1 (the right upper part of the sheet 101 is shaped like an IG gland)
1, guide 1, tit JIN to 301
, Several carts 302 (one T-cart in the figure) are movably supported, and the platform "fL302 is near morph-C".
*The speed jr and the movement Sh: jk T' are to be moved.

That is, a large number of coil pieces 303 constituting a coil are sunk in parallel on the idle rail 301, and two coil pieces 30 are placed in adjacent rows.
3, the polarity of the alternate excitation is different, and the excitation points are shifted in the longitudinal direction (arrow Y direction in the figure) (ζ sequentially).
There are 1.

On the other hand, N poles and 5 poles are arranged alternately on the trolley 302.
, f- A permanent magnet 304 is provided, and the carriage 302 is moved along the guide rail 301 via the permanent magnet 304 by sequentially shifting the excitation points of the coil piece 303. In other words, the linear motor is composed of a coil made up of coil pieces 303 and a permanent magnet 304.

The location where the coil piece 303 is excited is controlled by a control device 305, and the speed V of the truck 302 is controlled. The control device 305 receives the speed U of the seat 101 from the speed detection means 306 manually, and controls the moving speed V of the cart 302 (=u/caQθ, where θ is the inclination angle of the guide rail 301) to a desired speed. An excitation command is output from the device 305 to the coil piece 303.

A laser oscillator 307 is provided on the side of the guide rail 301, and the laser oscillator 307 emits a laser beam parallel to the straight portion of the guide rail 301 toward the truck 302. The truck 302 converges the laser beam onto the sheet 101, and the movement of the sheet 101 (X direction) and the truck 302 (Y direction) are combined and the converged laser beam has a moving speed VρInθ = 1. ], O
] is moved in the width direction, and the Kiriichi prayer of N-1.]01 is performed.

Note that 308 in the figure is a shutter for blocking the laser beam.

Next, based on FIGS. 2 to 6, guides 1, . . .
01 and the structure of the trolley 302 will be explained. .

Figure 2 shows 11. in LIA. -I line arrow view, Ki 3N (
In Fig. 4, the plane of one truck 302 is
Figure 5 shows a partially sectional side view and a front view from the outside.

As shown in FIGS. 2 and 3, a stand 4302 is suspended and supported on the guide rail 301, and a stand 11i302 (,
The movement is guided by the guide rail 40, and the air is injected from the guide rail 7b301 side air 402 (thus, the sliding movement is supported). A large number of coil pieces 303 are fixed to 301, and the coil pieces 303 and 303 are arranged on opposing stands*302.
0) A permanent magnet 304 is attached to the top surface.

As shown in FIGS. 4 to 6, the permanent magnet 304 provided on the trolley 302 is NI! ii and S poles are arranged alternately. The main body 403 of the trolley 302 has a cylindrical shape with an open bottom facing the seat 101, and an entrance port 404 for laser beams is formed on the outer peripheral surface.

A reflecting mirror 405 that reflects the laser beam downward is fixed in the main body 403 at an angle of 45 degrees, and the main body 403 below the reflecting mirror 405 converges the laser beam reflected by the reflecting mirror 405 onto the mirror 101. Infrared lens 40
6 is fixed. That is, the optical system is composed of a reflecting mirror 405 and an infrared lens 406. In addition to this, it is also possible to use a parabolic mirror of revolution as the optical system. When using a parabolic mirror of revolution, a part of the large parabolic mirror of revolution may be taken out and used. Furthermore, Figure 5,
407 in FIG. 6 is a sliding material for landing.

As shown in Figure 2, near the convergence point of the laser beam,
A blow-off fan 408 that blows away the fume generated during laser cutting, and a suction fan 409 that sucks the fume blown away by the blow-off fan 408 are left behind. (not shown).

Next, the operation of the laser processing apparatus having the above configuration will be explained.

By sequentially shifting the excitation points of the coil pieces 303 attached to the guide rail 301, the cart 302 moves along the guide rail 301 at a speed V. Combined with the moving speed U of the sheet 101, the cart 302 moves in the width direction of the sheet 01 at a moving speed volnθ.

At the same time as the carriage 302 moves, the laser oscillator 307
- When the beam is irradiated onto the trolley 302, the entrance port is 4.04.
The laser beam entering from the laser beam is reflected downward by a reflecting mirror 405 and converged onto the sheet 101 via an infrared I/F 406.

While converging the laser beam onto the sheet 101, the truck 30
2, the sheet 101 is cut in the width direction. The speed detection means 30 detects the moving speed of the sheet 101.
6, and the shifting speed of the excitation point by the control device 305, that is, the moving speed of the trolley 302 and the shutter 30
By appropriately controlling the opening and closing of the sheet 8, it becomes possible to cut the sheet 101 in any direction or make cuts in the sheet 101.

Fumes generated during laser cutting are blown away by a blowing fan 408 and collected by a suction fan 409.

Further, during cutting, the reflector 405 is constantly irradiated with a laser beam, so that the temperature of the reflector 405 tends to rise, but the reflector 405 is naturally cooled down by the movement of the cart 302. This eliminates the need for a special cooling mechanism or the like.

By the way, the focus of the laser beam does not converge to one point due to the beam waist effect, and as shown in FIG.
The t, , -y, and l parts are different, but if the laser bee 11 pups are 20"n1n and the focal length is 7.5 inches, the diameter W will be about 0.065 + nm, 11 degrees, and the actual sea 1 -101 permissible cutting distance (Yo,!'i +um) There is no practical problem at all.Cause (optical aperture J, lff U) When the apex angle tx is 66 and the sheet The maximum thickness of 101, the maximum cutting allowance when 718m1n (yo 0
．． 4n song and', i -J-Cr, )0 Yuda, double-composed cardboard sheet ]・'s 1 r++3
:) weight of tari, :I, ;, (specific gravity) (approximately 1.000
g-C) If the cutting depth is 0.5 mm, the seam 1 disappears in 1 second when cutting with a laser beam.
Weight of +r.

0,5+mnX vρlnθX 1. OOOg/IY
?・-(11 roar.

Because of this, the sheet width is 168 to 1.6 m, sorting length □. 1 mz m II C 4 m/s
Then, from equation (2) and equation (1), the cutting speed is 6.4
The weight of the sheet that disappears per second at m/s is 0,5nwnX6-4m/s X 1000 g
/rn'=3.2 g/s.

According to experiments, a power of approximately 700 ca, i' = 2.8 Kw is required to eliminate a sheet of 1 g/s. Therefore, at 3.2 g/s, 8.969 K
A laser oscillator with an output of w is required.

Since a commonly available laser oscillator is 10 Kw, laser cutting can be performed with the laser processing apparatus of this embodiment without using a special laser oscillator.

In the above embodiment, one truck 302 focuses one laser beam onto the sheet 101, but as shown in FIG.
a, 410b and a pair of infrared lenses 411a, 411b
Alternatively, the laser beams may be fixed and simultaneously irradiated with laser beams from two laser oscillators, and the two laser beams may be focused on the sheet 101 at the same time. With this scale]7
- By timing the irradiation of Zabino appropriately, it is also possible to cut out long holes for forming gluing margins, etc.

” In the double embodiment, the I/-ㅅ processing equipment is
101 (+) cutting, but it is also possible to use it for slicing wire because of the intermittent holes in the form of perforations in the surface layer of the seam corresponding to the creases.

That is, using the laser oscillators 1 to 11 and the pulse oscillation modes generated in an intermittent state, form lines b) on the surface layer of the sheet 01. It is possible to do so.

By the way, as shown in FIG. 8, which shows a cross section of the sea 1-101+j, the sea 1-101+j is composed of a front liner 412, a wavy insole 413, and a back liner 414. Then, the groove lines are made in the direction of the corrugation of the core 413, and the intermittent holes 415 are connected to the back liner 414 and the core 413.
It is desirable to form it at the position of the adhesive point (top of the step) or at the position of the adhesive point (bottom of the step) of the front liner 412 and 413 (as shown in FIG. 8).

Generally, by using an optical detection device, it is easy to detect the positions of the top and bottom of the step of the running sheet 101. Therefore, by adding a detection device, it is possible to control the carriage 302 to always move to the top or bottom position, and the intermittent holes 415 can be always formed at the top or bottom position. can be controlled to

In the above embodiment, one cart 302 is moved to explain simple cutting in the width direction of the sea 1-101 and sintering. By moving it on the sheet 101 or arranging multiple laser processing devices along the direction of movement of the sheet 1-10'l, it is also possible to process cut grooves, stepped grooves, etc. 5 6 , and it is possible to produce a corrugated sheet for assembling a corrugated cardboard case. Furthermore, in the embodiment described above, the trolley 30
2 was moved by a linear motor, but the carriage 30 was moved using a driving means such as pulling a wire by a motor.
2 may be moved along the guide rail 301.

In the laser processing device described above, the traveling seam )-10
1, a carriage 302 is run by a linear motor, and the laser beam is focused on the sheet 101 via the carriage 302, so that the running sheet 101 can be cut or marked along any route without contact. I can do it. For this reason, the sheet 101 may swell or the inner core 41 may swell.
No. 3 will be cut and scattered as paper dust. Further, since the cart 302 moves linearly on the sheet 101 and always maintains a constant distance from the sheet 101, the laser beam can be focused on the sheet 101 without using a complicated optical system.

<Effects of the Invention> In the laser processing apparatus of the present invention, the cart is movable by the driving means in the direction intersecting the traveling material, and the laser beam is focused on the traveling material via the cart, so that it is easy to use. With this configuration, it is possible to process the moving material along any route without contact. Further, in the laser processing apparatus of the present invention, the cart is movable by a linear motor in a direction intersecting the traveling material, and the laser beam is focused on the traveling material via the cart.
It is possible to perform highly accurate machining on any route without contacting the moving material. As a result, by applying the laser processing device of the present invention to the processing of corrugated sheets, there will be no occurrence of sheet sagging or scattering of paper dust, which will cause quality deterioration of the sheets. It is now possible to produce corrugated cardboard sheets in a series of operations without having to do anything.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the laser processing device according to the present invention, which is applied to the cutting of a seal 1° of a pull-shaped stepped small-rule, and Fig. 2 is a perspective view of the laser processing device according to the present invention. -11 line arrow view, Figure 3 ζ, ■ arrow view in Figure 2, Figure 4 is a plan view of the trolley, Figure 5 is
Partial cross-sectional side view, Figure 6; Front view from the outside (+),
Fig. 7 is a front view showing another example of the trolley, and Fig. 8 is a front view of another example of the trolley.
・It is a partial sectional view of. In the drawing, 1, 0:lI mashi--1, 30] is a guide leno L1 302 III) ILl 303 tI coil piece, 304 is a permanent magnet, 307 is a laser oscillator, 405 is a reflector, 40 is a 412 is the front liner, 413 is the front liner, and 414 is the back liner. 9 Figure 6 Figure 7 JP-A-3 275292 (8) Figure 8 13 12

Claims (2)

[Claims] (1) A guide rail that extends in one direction that intersects with the running direction of the traveling material that runs in one direction, a truck that is movably supported by the guide rail, and a drive means that drives the movement of the truck. A laser processing device comprising: a laser oscillator that emits a laser beam toward the truck; and an optical system that is provided on the truck and focuses the laser beam onto the traveling material. (2) A guide rail that extends in one direction that intersects the running direction of the running material that runs in one direction, and excitation points that are arranged along the longitudinal direction of the guide rail and have excitation polarity alternately different in the longitudinal direction. a coil in which the coils are sequentially shifted in the longitudinal direction;
a trolley that is movably supported along the guide rail and includes permanent magnets in which N and S poles are alternately arranged, and that moves along the guide rail by sequentially shifting the excitation points of the coil; A laser processing device comprising: a laser oscillator that emits a laser beam toward the truck; and an optical system that is provided on the truck and focuses the laser beam onto the traveling material.