JPS63104791A - Laser beam machining method - Google Patents

Abstract

PURPOSE:To improve machining efficiency by forming a starting point to stop the cutting on a visible outline of an object to be machined and then, forming a finishing point on the outside of the outline and afterward, performing the cutting to return to the outline. CONSTITUTION:First, a cutting starting point 21 is set on the outside of the outline 20 of the object 2 to be machined and a piercing line 22 is formed from said point 21 and the cutting on the outline 20 is performed. Next, the cutting is stopped on a cutting stopping point 23 to form a starting point of a micro joint and afterward, a laser head is traversed rapidly with the noncutting until the cutting starting point (finishing point) 26 of the outside of the outline 20. Next, the cutting is performed from the finishing point 26 to a returning machining point 28 on the outline 20 and continuously, the cutting of the outline 20 is performed. The adjustment of the micro joint part is made possible and the machining efficiency is improved by the shortening of the machining time, the output reduction at the time of machining, etc., by this method.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a laser processing method for processing a workpiece, which is a desired cutting plate, from a workpiece plate.

In particular, the present invention relates to a laser processing method that can improve processing efficiency.

(Prior art) In this type of conventional laser processing method, laser processing was carried out as shown in Fig. 3. Fig. 3 shows a diagram of the processing state of a workpiece plate by the conventional method. In the figure, the conventional laser processing method starts projecting the laser beam from a cutting start point (21) outside the outline (20) of the workpiece (2) on the workpiece (1), and After the piercing wire (22) is formed by this cutting, further projection of the laser beam is continued to obtain the above-mentioned outer shape tl.
(20) Make the above cut and add the cut to the external shape &! (2G)
Cut the outline (20) outward at the upper midpoint to form a relief part (24) to interrupt the projection of the laser beam, and after the projection of the laser beam is interrupted, the laser head of the laser processing machine is fast-forwarded. to form a fast-forwarding part (25), and after this laser head fast-forwarding, projection of the laser beam is started again from a cutting start point (28) outside the outline (20) to form a relief part (27), The configuration is such that cutting is performed by returning to the outline (20) from this relief part (27).

[Problem that the invention seeks to solve]

Since the conventional laser processing method is configured as described above, the thickness of the workpiece plate! The problem is that the shape of the micro-joint cannot be changed depending on factors such as the material, and the laser processing method is particularly complex, resulting in large losses in laser processing output, processing time, and laser processing efficiency during finishing work. It had

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a laser processing method that can improve laser processing efficiency by specifying the shape of a micro-jib India for laser processing.

[Means for solving problems]

The laser processing method according to the present invention cuts a workpiece plate along the outline of the object to be machined, forms one end (starting point) of a micro-joint by interrupting the cutting on the outline, and forms one end (starting point) of the micro-joint. It is formed by leaving an uncut part from one end (starting point) and restarting the cutting at a position away from the other end (end point) by a predetermined distance to the outside of the outline line at the other end (end point) opposite to the one end (starting point), and forming the other end (end point). ), the object is processed and formed by cutting inward again on the outline line.

[Effect]

In the laser processing method of the present invention, one end (starting point) is placed on the outline of the object to be processed, and the other end (end point) is cut outside the outline of the object to be processed to form a micro joint. can be easily formed, and processing efficiency can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a diagram of the cutting process of this embodiment.
Figure 2 shows an enlarged view of the micro joint of this example.
In each of the above figures, the laser processing method according to this embodiment shows the outline (20
) Projection of the laser beam is started from the cutting start point (21) outside, cutting in the direction of the above outline line (20), and after forming the piercing line (22) with this cutting, the projection of the laser beam continues. and cut on the above outline line (20),
The projection of the laser beam is interrupted at a midpoint on the outline line (20) to form a cutting stop point (23), and after the projection of the laser beam is interrupted, the laser head of the laser processing machine is fast-forwarded. A fast-feeding part (25) is formed, and after this laser head fast-feeding, a cutting start point (
Start projecting the laser beam again from 2B) to reach the escape part (
27), and from this relief part (27) the outline line (20
) This is a configuration in which the user returns to the top and performs the cutting.

Next, the operation of the method of this embodiment based on the above configuration will be explained. First, a laser beam is projected from a cutting start point (21) outside the outline (20) of the workpiece (2), and the thickness of the workpiece plate (1) is After adjusting the output of the laser beam according to each element such as material quality, cutting is started with the optimum laser beam processing output, and after processing the pierced wire (22), the outline line (20 ) processing begins. The outline line (20) is machined at a predetermined midpoint position on the outline line (20), and the cutting process is continued at a cutting stop point (23) that forms the starting point of the micro joint on the outline line (20). Abort. After this processing is stopped, the laser head of the laser beam machine is fast-forwarded to form a micro joint in the fast-forward section (25).

The micro-joint created by this rapid feed section (25) consists of a non-cutting section between the cutting process stop point (23), which is the starting point, and the next cutting starting point (26), which is the ending point. The width is determined by the distance 11fld+ to the starting point (28) and the distance #d2 to the return processing point (28) on the next outer shadow line (20). These distances d1 and d2 are determined by adjusting the width according to various factors such as the thickness and material of the workpiece plate (1). Further, the fast-forwarding operation of the laser head that forms this micro-joint is controlled by numerical control.

Furthermore, after the above-mentioned rapid forwarding is performed, the laser head is located at a cutting start point (2B) outside the outline (20) determined by the fast forwarding section (25), and from this cutting start point (2B) to the cutting start point The cutting process is started in the same manner as the process from (21), and after forming the relief part (27), the workpiece returns to the outline (20) and the workpiece (2) is processed.

In the above embodiment, the micro joint formed in the rapid feed section (25) is provided at one location on the outer periphery of the workpiece (2), but the micro joint may be provided at a plurality of locations.

Furthermore, although laser processing has been described in this embodiment, the present invention can also be applied to cutting processing using gas, etc.

〔Effect of the invention〕

The laser processing method according to the present invention cuts a workpiece plate along the outline of the object to be machined, forms one end (starting point) of a micro-joint by interrupting the cutting on the outline, and forms one end (starting point) of the micro-joint. It is formed by leaving an uncut part from one end (starting point) and restarting the cutting at a position away from the other end (end point) by a predetermined distance to the outside of the outline line at the other end (end point) opposite to the one end (starting point), and forming the other end (end point). ) to the inside again to return to the outline line to process and form the object, one end (starting point) is set on the outline line of the object to be processed,
By cutting the other end (end point) outside the outline of the workpiece to form a micro-joint, the micro-joint part can be easily formed, reducing the amount of output during machining, shortening machining time, and finishing. This has the effect of improving processing efficiency based on simplification of work and the like.

[Brief explanation of the drawing]

FIG. 1 shows a cutting process using a laser processing method according to an embodiment of the present invention, FIG. 2 shows an enlarged view of a micro joint, and FIG. 3 shows a cutting process using a conventional method. (1): Work plate, (2): Processing object, (20): Outline. (21): Cutting start point, (22): Pierce wire, (23): Cutting stop point (starting point), (24), (27): Relief part, (2B): Cutting start point (end point), ( 28): Return processing point. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (4)

[Claims] (1) Cut the workpiece plate along the outline of the object to be processed,
In a laser processing method that performs laser processing by providing a micro-joint that leaves a non-cutting part where the starting point and the ending point are a pair of ends in a part of the outline, the cutting is interrupted and the starting point is moved to the processing target. After forming the starting point, leave the uncut portion and form an end point opposite to the starting point at a predetermined interval on the outside of the outline line, and then move inside the outline line again from the end point. A laser processing method characterized by having a configuration in which cutting is performed back to . (2) The end point of the above micro joint is the thickness of the workpiece plate.
The laser processing method according to claim 1, characterized in that the distance outward from the outline of the object to be processed is set according to factors such as material. (3) The end point of the above micro joint is the thickness of the workpiece plate.
The laser processing method according to claim 1 or 2, characterized in that the interval between the parts to be cut is set depending on factors such as material. (4) The laser processing method according to each of claims 1 to 3, wherein the micro joints are provided at a plurality of locations on the outline of the object to be processed.