JPH11277285A - Laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily carry out processing work exceeding a moving stroke by disposing a first linear movement mechanism of a large moving quantity disposed on one end side in the transverse direction of a work and a second linear movement mechanism of a small moving quantity placed on the moving bed of this first linear movement mechanism. SOLUTION: In the first linear movement mechanism 8 for imparting the large moving quantity S1, a screw shaft 801 which is, for example, long in size, itself has high mechanical strength and is bold and heavy 10 weight is turned by a motor of large driving force and, therefore, electrical consumption is large and so-called inertia is inevitably generated at the time of starting and stopping of the large-weight screw shaft 801. At the time of executing the processing within the small moving quantity 32, the work movement of small electric power consumption and extremely little inertia is embodied as the light weight screw shaft 171 is operated to be tuned if the work is assumed to be moved by the second linear movement mechanism 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser processing apparatus for mainly cutting a plate material placed on a processing table by a laser beam.

[0002]

2. Description of the Related Art Generally, a laser processing apparatus for performing fine processing based on NC (numerical control) data inputted is widely used.

Conventionally, for example, devices shown in FIGS. 5 to 9 have been proposed. That is, reference numerals 2 and 3 denote working tables attached to the fixed frame 1, and the working tables 2 and 3 have a large number of rotatable free bearings 4,
The work W is mounted on the free bearings 4, 4,. In the central portion of the processing tables 2 and 3 as a whole, an opening 5 in the longitudinal direction of the work W, that is,
Are formed. The opening 5 is for dropping the cut work W and taking out the finally cut work W out of the apparatus.

[0004] Reference numeral 6 denotes a work W placed on a processing table.
The work moving device 6 moves in the longitudinal direction of the work W, that is, in the X direction while holding the work. For example, the work moving device 6 is a holding member capable of holding and releasing an end in the width direction of the work, for example, an end in the Y1 direction. 7 and a drive mechanism 8 that can move the holding member 7 in the X direction.

As the driving mechanism 8, a well-known linear moving mechanism is appropriately employed. For example, a motor (not shown) and a screw shaft 801 rotated by the motor are used.
And a guide member 80 parallel to the screw shaft 801
The drive mechanism 8 includes a movable table 803 having a female screw that is screwed to the screw shaft 801 and that is moved in the X direction along the guide member 802.

The moving device 9 in the Y direction is similar to the driving mechanism 8 in the X direction described above. For example, a motor 901 and a screw shaft 902 rotated by this motor are provided.
And a guide member 90 parallel to the screw shaft 902
3 and a moving table 904 having a female screw screwed to the screw shaft 902 and moved in the Y direction along the guide member 903, constitute a moving device 9 in the Y direction.

Reference numeral 11 denotes an appropriate laser oscillator mounted on the fixed frame 1, for example, a carbon dioxide gas laser oscillator;
Converts the laser light output from the laser oscillator 11 into a work W
A first reflecting mirror for reflecting the laser beam directed in the Y1 direction in a direction perpendicular to the surface of the work W, ie, a Z1 direction; A processing torch provided with a condensing lens 15, a laser processing head 16 is constituted by these 13 to 15, and the laser processing head 16 is appropriately moved in the Y direction by the moving device 9 in the Y direction, Be moved.

The fixed frame 1, the processing table 2,
3, a laser processing device is configured by the work moving device 6, the processing head moving device 9, and the laser processing head 16,
One end of the work W placed on the processing tables 2 and 3 is held by the holding member 7. Thereafter, the power supply of the laser oscillator (not shown) is operated, and the laser oscillator 11 is turned on.
, Laser excitation and amplification are performed, and a desired laser beam is output from the laser oscillator 11. While the output laser light is irradiated onto the work W via the first and second reflecting mirrors 12 and 13 and the condenser lens 15,
The workpiece moving device 6 and the processing head moving device 9 are appropriately driven based on the NC data input in advance to perform desired laser processing.

That is, in laser processing, laser processing is performed by moving the work W in the X direction for processing in the X direction and by moving the laser processing head 11 in the Y direction for processing in the Y direction.

Of course, the position of the processing torch 14 is appropriately adjusted in the Z direction as needed. The cut work W is dropped downward from the opening 5 of the table and taken out of the apparatus.

[0011]

By the way, if a so-called dedicated laser processing device based on individual specifications is used, the production cost of the device is high, and therefore, considering the cost reduction and immediate delivery of the processing device, A "standard processing apparatus" in which various specifications are predetermined by a manufacturer, that is, a so-called commercially available "general-purpose processing apparatus" that is compacted in consideration of installation and operability of the processing apparatus is frequently used. As described above, with the realization of the “general-purpose processing device” in consideration of the low cost and the immediate delivery of the processing device, the laser processing device has been rapidly spread recently. In this case, the movement stroke of, for example, the work moving device 6 in the “general-purpose processing device” is a value based on past specification data grasped by the manufacturer, and most of the processing can be performed.

[0012] However, regardless of the past specification data that the manufacturer has grasped, there is a tendency for the user to gradually increase the number of cases where the longest possible workpiece is laser-processed. In this case, the moving stroke of the work moving device 6 in the “general-purpose processing device” is a predetermined moving amount. It is necessary to suspend and shift the work holding position in the longitudinal direction of the work. However, from the operator's side, the work of changing the holding position of the work by the holding member 7 is troublesome, and in particular, a great amount of adjustment time is spent as the area of the workpiece W becomes large or its own weight becomes large. Was.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object the object of the present invention is to provide a general-purpose laser processing apparatus, which can easily perform a processing operation exceeding a moving stroke of the work moving apparatus, and is inexpensive. It is to provide a simple laser processing device.

[0014]

According to a first aspect of the present invention, a plurality of rotatable free bearings are protruded from an upper surface,
A processing table having a vertical opening opposed to the workpiece in the center in the vertical direction, and a workpiece movement for moving the workpiece in the longitudinal direction of the workpiece while holding one end of the workpiece placed on the processing table. The present invention is applied to a laser processing apparatus including an apparatus and a processing head moving apparatus that moves a laser processing head in a width direction of a work. The feature is that the work moving device comprises a first linear moving mechanism having a large moving amount disposed on one end side in the width direction of the work;
And a second linear moving mechanism having a small moving amount that is mounted on the moving table of the linear moving mechanism and moves the work holding member in the same direction as the moving direction of the moving table.

According to a second aspect of the present invention, in the first aspect,
The first linear movement mechanism has a long screw shaft rotated by a driving machine.

According to a third aspect of the present invention, in the first or second aspect, an auxiliary machining table is attached to each end of the workpiece in a longitudinal direction of the workpiece.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 4 are diagrams showing an embodiment of the present invention. In these configurations, the components substantially the same as those in FIGS. 5 to 9 are denoted by the same reference numerals. Omit.

1 to 4, the work W placed on the processing table 1 is moved in the longitudinal direction of the work, that is, X.
Each of the work moving devices 18 for moving in the directions
A first linear moving mechanism 8 having a large moving amount for linearly moving in the direction, a second linear moving mechanism 17 having a small moving amount mounted on the first linear moving mechanism 8, and a holding member 7; ing. For example, the motor includes a motor (not shown), a screw shaft 801 rotated by the motor, a guide member 802 parallel to the screw shaft 801, and a female screw screwed to the screw shaft 801. Table 803 moved in the direction
A first linear moving mechanism 8 having a large moving amount is configured by the above. This first linear moving mechanism 8 is the same as the conventional one,
The maximum movement amount provided as a "general-purpose laser processing apparatus" is defined, and for example, this movement stroke is S1.

Reference numeral 17 denotes a second linear moving mechanism having a small moving amount and having substantially the same configuration as the first linear moving mechanism 8, and includes, for example, a motor (not shown) and a screw shaft rotated by the motor. 171, a guide member 172 parallel to the screw shaft 171, and a moving table 173 having a female screw screwed to the screw shaft 171 and moved in the X direction along the guide member 172, a second linear moving mechanism 17 are constituted. This second
The moving stroke S2 of the linear moving mechanism 17 is smaller than the moving stroke S1 of the first linear moving mechanism 8, and the holding member 7 for holding and releasing the work W is attached to the moving table 173. I have.

Reference numerals 19 and 20 denote X1 of the processing tables 2 and 3.
Auxiliary machining tables attached to the ends in the X direction and the X2 direction. On the upper surfaces of the auxiliary machining tables 19 and 20, a large number of rotatable free bearings 4, 4,. The work W is smoothly supported by the free bearings 4, 4,...

In the laser processing apparatus configured as described above, one end of the work W placed on the processing tables 2 and 3 is held by the holding member 7 as in the related art. Thereafter, a power supply device of a laser oscillator (not shown) is operated, and laser excitation and amplification are performed by the laser oscillator 11, and a desired laser beam is output from the laser oscillator 11. The output laser light is applied to the work W via the first and second reflecting mirrors 12 and 13 and the condenser lens 15 and is composed of the first and second linear moving mechanisms 8 and 17. The work moving device 18 and the processing head moving device 9 to be driven are appropriately driven based on the NC data input in advance, and desired laser processing is performed.

That is, at the time of laser processing, the work W
Is moved in the X direction within the range of the movement amount S1 + S2. As described above, the moving amount S1 of the second linear moving mechanism 17 is added to the moving amount S1 of the work W as a "general-purpose laser processing apparatus", and a wide range of laser processing with a large moving amount in the X direction is performed. Can be done.

In this case, the work is largely moved in the X direction.
Since the components 9 and 20 are attached, the workpiece W is stably supported even in a so-called “general-purpose laser processing device”.

As described above, in the conventional "general-purpose processing apparatus", in order to perform the processing exceeding the specified moving stroke of the work moving apparatus, the work is interrupted in the middle of the processing work and the holding position of the work is changed to the longitudinal direction of the work. Although it was necessary to shift in the direction, the laser processing apparatus according to the present invention is intended for a general-purpose laser processing apparatus, and the second linear movement mechanism 17 and the auxiliary processing tables 19 and 20 are added to the “general-purpose laser processing apparatus”. By attaching it, it is possible to easily perform processing work exceeding the moving stroke of the “general-purpose laser processing device” without the need to change the work holding position, and to reduce the cost to the inexpensive “general-purpose laser processing device”. A simple configuration may be added, and as a result, a desired laser processing apparatus can be realized at low cost.

The first linear moving mechanism 8 having a large moving amount S1 provided in the "general-purpose laser processing apparatus" has:
A second linear moving mechanism 17 having a moving amount S2 smaller than the moving amount S1 is additionally provided. However, the first linear moving mechanism 8 for providing a large moving amount S1 is, for example, long and itself. Since the screw shaft 801 having a large mechanical strength and having a large weight is rotated by a motor having a large driving force, in order to move the work by the first linear moving mechanism 8, the power consumption is large and the weight of the self-weight is large. When the large screw shaft 801 is started and stopped, so-called inertia is inevitably generated. For this reason, if the work is moved by the second linear movement mechanism 17 during the processing within the small movement amount S2 during the laser processing operation, the screw shaft 171 having a small own weight is rotated. In addition, it is possible to realize a work movement with low power consumption and extremely little inertia, that is, almost no knocking.

Although the laser processing apparatus according to the present invention is most suitable for a cutting operation, it is needless to say that the laser processing apparatus is also applicable to operations such as welding and drilling.

[0027]

As is apparent from the above description, in the conventional "general-purpose processing apparatus", in order to perform the processing beyond the moving stroke of the work moving apparatus, the work is interrupted during the processing operation. Although it was necessary to perform a troublesome adjustment operation of shifting the work holding position in the longitudinal direction of the work, the laser processing apparatus according to the present invention has a large number of rotatable free bearings protruding from the upper surface, and has a central position. A work table provided with vertical openings opposed to each other in the longitudinal direction of the work, and a work moving device for moving the work in the longitudinal direction of the work while holding one end of the work placed on the work table And a processing head moving device for moving the laser processing head in the width direction of the work, wherein the work moving device is disposed at one end in the width direction of the work. A first linear moving mechanism having a large moving amount, and a second moving mechanism having a small moving amount which is mounted on the moving table of the first linear moving mechanism and moves the work holding member in the same direction as the moving direction of the moving table. Of the linear movement mechanism of
By attaching the second linear movement mechanism and auxiliary processing table to the “general-purpose laser processing device”, it is possible to perform processing operations that exceed the moving stroke of the “general-purpose laser processing device” without the need to change the work holding position. What is necessary is just to attach the above-mentioned simple configuration to an inexpensive "general-purpose laser processing apparatus" which can be easily performed, and as a result, a desired laser processing apparatus can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged front view showing a main part in FIG. 1;

FIG. 4 is a partial cross-sectional side view showing an enlarged usage state in FIG. 1;

FIG. 5 is a perspective view showing a conventional example.

6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is an enlarged sectional view showing the processing table in FIG. 5;

FIG. 8 is an enlarged partial cross-sectional front view showing a main part in FIG. 7;

FIG. 9 is a partial cross-sectional side view showing an enlarged usage state in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed frame 2, 3 Processing table 4 Free bearing 7 Work holding member 8 First linear moving mechanism 9 Processing head moving device 11 Laser oscillator 12 First reflecting mirror 13 Second reflecting mirror 14 Processing torch 15 Light collecting Lens 16 Laser processing head 17 Second linear moving mechanism 18 Work moving device 19, 20 Auxiliary processing table

Claims (3)

[Claims] A machining table having a plurality of rotatable free bearings protruding from an upper surface and having a vertical opening opposed to a longitudinal direction of a work at a central portion;
A laser processing device including a work moving device that moves the work in the longitudinal direction of the work while holding one end of the work placed on the processing table, and a processing head moving device that moves the laser processing head in the width direction of the work In the above, the work moving device may include a first linear moving mechanism having a large moving amount disposed on one end side in the width direction of the work, and a moving table mounted on the moving table of the first linear moving mechanism. A laser processing apparatus comprising: a second linear moving mechanism having a small moving amount for moving a work holding member in the same direction as the moving direction. 2. The laser processing apparatus according to claim 1, wherein the first linear moving mechanism has a long screw shaft rotated by a driving machine. 3. The laser processing apparatus according to claim 1, wherein an auxiliary processing table is attached to each end of the processing table in a longitudinal direction of the work.