JPH09150284A - Method for machining bevel with three dimensional laser beam machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bevel machining method with a three dimensional laser beam machine which can simplify the bevel machining at the time of butt- welding containing a bending part after cutting off and bending a work. SOLUTION: In the three dimensional laser beam machine (1) which can freely control the posture of a nozzle (23), at the time of cutting off the work W by using the three dimensional laser beam machine following to an automatic program, a tapered angle of the cut-off line is set from machining data of the plate thickness of the work W and shape of curving line, etc. The cutting-off and the bevel machining are simultaneously executed by controlling of the nozzle (23) corresponding to this tapered angle. The tapered angle can automatically he decided based on the machining data of the plate thickness, the position of curving line, etc. In other way, the operator can suitably input corresponding to the cut-off position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groove processing method using a three-dimensional laser processing machine, and more particularly to a groove processing method using a three-dimensional laser processing machine for a workpiece to be butt-welded including a bent portion. Is.

[0002]

2. Description of the Related Art Conventionally, two works W1 and W2 with a flange 101 as shown in FIG.
In the case of butt welding at a right angle as shown in (B), first, as shown in FIG. 10, each member is developed and laser-cut, and then bent along a bending line BL to perform each work W1. , W2, and the workpieces W1 and W2 are generally butt welded.

[0003]

However, FIG.
Refer to the bending line BL after cutting as described above.
When each member is formed by bending along, the outside of the bent portion is stretched and stretched on the end faces 103 of the works W1 and W2, and the inside is compressed and protrudes outward from the end face 103.

In this case, the protrusions 10 of the works W1 and W2 are provided.
Since the 5 pieces collide with each other and proper welding cannot be performed, it is troublesome to perform the butt welding after scraping off the protruding portion 105.

When the abutting is impossible due to the plate thickness as shown in FIG. 12 (A), welding defects are avoided by abutting as shown in FIG. 12 (B). Therefore, there is a problem that teaching in the automatic welding machine becomes complicated.

The object of the present invention was made by paying attention to the above-mentioned conventional techniques, and when the work is cut and bent, and then the butt welding is performed including the bent portion. An object of the present invention is to provide a groove processing method using a three-dimensional laser processing machine capable of simplifying the groove processing.

[0007]

In order to achieve the above object, a groove processing method using a three-dimensional laser beam machine according to the first aspect of the invention is a tertiary method in which the attitude of a nozzle for irradiating a laser beam can be freely controlled. The original laser processing machine, when performing the cutting processing of the work using the three-dimensional laser processing machine by an automatic program, the taper angle of the cutting line from the processing data such as the plate thickness of the work and the shape of the bending line The nozzle is set and the posture of the nozzle is controlled according to the taper angle.

Therefore, by controlling the attitude of the nozzle in accordance with the processing conditions, it is possible to perform groove processing for butt welding simultaneously with cutting of the work.

A groove processing method using a three-dimensional laser beam machine according to a second aspect of the present invention is characterized in that the taper angle according to the first aspect is automatically determined based on the processing data.

Therefore, the posture of the nozzle is automatically controlled so that the cutting of the work and the groove processing at a predetermined angle are simultaneously performed.

A groove processing method using a three-dimensional laser beam machine according to a third aspect of the present invention uses the taper angle according to the first aspect,
It is characterized in that the operator appropriately inputs in correspondence with the cutting position.

Therefore, by appropriately inputting the taper angle in the portion where the groove processing is required, the posture of the nozzle is controlled to perform the desired groove processing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

7 and 8 show a three-dimensional laser beam machine 1.
The whole is shown. That is, a plurality of (for example, four) columns 5 are erected on the floor surface 3. Left and right X-axis guides 7, 7 extending in the X-axis direction are placed and fixed on the column 5. Further, a support plate 9 is provided on the column 5 in the Y-axis direction.

An X-axis carriage 11 is provided between the X-axis guides 7, 7 so as to extend in the Y-axis direction.
The axis servo motor allows movement and positioning in the X axis direction.

Next to the X-axis carriage 11, the Y-axis guide 1 is provided.
3 is installed side by side, and a Y-axis carriage 15 is provided which can be moved and positioned in the Y-axis direction along the Y-axis guide 13 by a Y-axis servomotor (not shown).

The Y-axis carriage 15 has a Z-axis column 1 which can be moved up and down in the Z-axis direction by a Z-axis servomotor (not shown).
7 is attached to the lower end of the Z-axis column 17,
Processing head 2 via an arm 19 extending in the horizontal direction
1 is provided. A nozzle 23 is detachably attached to the tip of the processing head 21.

The machining head 21 is rotated around an axis in the XY plane (that is, by an A-axis servomotor (not shown)).
It can be freely rotated and positioned in the A-axis direction).

The Z-axis column 17 has a C (not shown).
Around the Z-axis (that is, C-axis direction) by the axis servo motor
Can be freely rotated and positioned.

A work W having a three-dimensional shape is placed on the floor surface 3 in an area surrounded by the plurality of columns 5.
A work table 25 for fixing is provided. An NC control device 27, a laser oscillator 29, a laser oscillator power supply 31 and the like are provided outside thereof.

Therefore, the machining head 21 is positioned by moving the X-axis carriage 11, the Y-axis carriage 15, and the Z-axis column 17 with respect to the work W fixed on the work table 25, and the A-axis and the C-axis are rotated. The posture of the processing head 21 is controlled to irradiate the workpiece W with a laser beam from the nozzle 23 to perform processing.

When the three-dimensional laser beam machine 1 as described above is used, the angle of the nozzle 23 can be freely set, so that it can be used for the groove processing of the work W.

That is, when the teaching is performed prior to the cutting process, if the taper angle to be cut is designated, the groove process can be automatically performed at the same time as the cutting. The taper angle may be determined automatically from the processing conditions such as the plate thickness, the bending angle, the position of the bending line BL, etc., or the taper angle may be appropriately input according to the cutting position of the work W. You may

For example, the work W1 shown in FIG.
When performing butt welding on W2, the workpieces W1 and W2 are cut and processed into a developed shape as shown in FIG. 2B, and then bent along the bending line BL, and butt welded.

At the time of cutting, the break point P0 is used as a teaching point, but in the vicinity of this break point P0, in order to avoid the inconvenience described in the above-mentioned section of the prior art, it is possible to make a recess in the plate thickness direction. Will be needed.

Therefore, the position of the cutting line shown in FIG. 1 (A) is cut with a taper angle as shown in FIG. 1 (B). That is, before and after the break point P0, the work W is cut at a right angle to the surface, but the break point P
In the vicinity of 0, it is cut with a large taper angle as it approaches the break point P0. Then, at the break point P0, the cutting is performed with an inclination of α degrees with respect to the right-angled cutting surface.

This taper angle is shown in FIG. 3 (A) or FIG. 3 (B).
It is controlled by changing the inclination angle of the nozzle 23 as shown in FIG. Here, the setting of the taper angle is
When the reference surface of the dimension of the work W is on the upper surface, it is tapered as shown in FIG. 3A, but when the reference surface is on the lower surface, it is tapered as shown in FIG. 3B. Control to attach.

As a result, the above-mentioned break point P is obtained as in the conventional case.
It is possible to avoid a situation in which the protrusions that occur near 0 collide with each other and butt welding cannot be performed.

Further, for example, when performing the welding process as shown in FIG. 4, the work W is cut and processed in the development view as shown in FIG. 5 and then bent. Referring also to FIG. 6, in this cutting process, the side that becomes butt welding in the work W is grooved at 45 °, for example, at the side L _{A in} FIG. 5, but after passing the break point P0. Is also tapered to prevent the protrusion at the break point P0 position.

As a result, similarly to the above-mentioned case, it is possible to prevent the projections from colliding with each other and enable butt welding.

From the above results, it is possible to weld with a small number of teaching points by giving information such as the position and shape of the bending line or the taper angle to the cut shape given two-dimensionally by the teaching of the work W. Since the groove processing can be performed simultaneously with the cutting processing, it is not necessary to perform complicated teaching in consideration of the groove processing shape. Thereby, the processing efficiency can be improved.

The present invention is not limited to the above-described embodiment, but can be embodied in other forms by making appropriate changes. That is, the three-dimensional laser beam machine 1 described in the above-mentioned embodiment is merely an example, and any device that can freely control the attitude of the nozzle can be applied.

[0033]

As described above, in the groove processing method by the three-dimensional laser beam machine according to the first aspect of the present invention, the attitude of the nozzle is controlled in accordance with the processing conditions so that the workpiece is projected at the same time as cutting. Since groove processing for patch welding can be performed, processing efficiency can be significantly improved.

In the groove processing method using the three-dimensional laser beam machine according to the second aspect of the present invention, the posture of the nozzle is automatically controlled to simultaneously perform the cutting of the workpiece and the groove processing at a predetermined angle, so that the work is not performed by an expert. Even a person can easily perform the groove processing, and the processing efficiency can be significantly improved.

In the groove processing method by the three-dimensional laser beam machine according to the third aspect of the present invention, the taper angle at the portion where the groove processing is required is appropriately input to control the posture of the nozzle to achieve the desired groove processing. Therefore, even complicated groove processing can be performed at the same time as cutting, and the processing efficiency is significantly improved.

[Brief description of the drawings]

FIG. 1 is a graph showing an example of a relationship between a cutting line and a taper angle of a groove by a groove processing method using a three-dimensional laser beam machine according to the present invention.

FIG. 2 is an explanatory view showing a butt welding by the groove shape shown in FIG. 1 and a development view of a work.

FIG. 3 is an explanatory diagram showing a posture of a nozzle in groove processing.

FIG. 4 is a perspective view showing another case of butt welding.

FIG. 5 is a development view of a work.

FIG. 6 is a graph showing a relationship between a cutting edge of a work and a taper angle of a groove.

FIG. 7 is a front view showing an example of a three-dimensional laser beam machine.

FIG. 8 is a plan view seen from the direction VIII in FIG. 7;

FIG. 9 is an explanatory diagram showing an example of conventional butt welding.

FIG. 10 is a development view of a work.

FIG. 11 is an explanatory diagram showing protrusions when a work is bent.

FIG. 12 is an explanatory diagram showing an example of conventional butt welding.

[Explanation of symbols]

 1 3D laser beam machine 23 Nozzle W work

Claims (3)

[Claims] 1. A three-dimensional laser processing machine in which the attitude of a nozzle for irradiating a laser beam can be freely controlled, wherein the workpiece is cut when the workpiece is cut by using the three-dimensional laser processing machine by an automatic program. A groove groove processing by a three-dimensional laser processing machine characterized in that the taper angle of the cutting line is set from the processing data such as the plate thickness and the shape of the bending line, and the posture of the nozzle is controlled according to this taper angle. Method. 2. The groove processing method with a three-dimensional laser beam machine according to claim 1, wherein the taper angle is automatically determined based on processing data. 3. The groove processing method with a three-dimensional laser beam machine according to claim 1, wherein the operator appropriately inputs the taper angle in correspondence with the cutting position.