JPH055281U - Laser cutting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents the generation of flames from the workpiece during laser cutting. [Structure] A surface of the machined surface on which the workpiece is not present is covered with a cover plate. [Effect] Since the air suction force at the cutting location does not decrease, the occurrence of flame can be prevented and the cutting quality of the cut does not deteriorate.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a laser cutting device that irradiates a workpiece with a laser beam to perform cutting.

[0002]

[Prior Art]

 FIG. 2 is an overall perspective view showing an example of a conventional laser cutting device. The laser cutting device cuts a sheet-shaped work piece into an arbitrary shape, and the work piece 1 is placed on the processing table 2 in an expanded state. The workpiece 1 is irradiated with a laser beam 4 oscillated from a laser oscillator 3. The details will be described below. First, the electric energy supplied from the laser oscillator power source 5 is converted into optical energy by the laser oscillator 3 and oscillated as a laser beam 4. The laser beam 4 is reflected by the first bend mirror 6 and the second bend mirror 7 and hits the convex mirror 8, where the beam diameter of the laser beam 4 is expanded. The expanded laser beam 4 then strikes the concave mirror 9 to become a parallel beam and enters the lens 10. The direction of the laser beam 4 from the lens 10 is changed by the oscillating mirror 11 and focused on the sheet-shaped workpiece 1. The oscillating mirror 11 oscillates around two axes θ 1 and θ 2 which are orthogonal to each other by a mirror oscillating drive device 12, and draws an arbitrary cutting figure on the workpiece 1. As for the focus of the laser beam 4, the distance from the oscillating mirror 11 to the focus varies depending on the coordinate (X, Y) position of the figure. The laser beam 4 is moved along the optical axis so that the laser beam 4 is always focused on the workpiece 1. The processing table 2 has a belt conveyor structure.

On the upstream side of the processing table 2 having the belt conveyor structure, an automatic material supply device 15 for supplying an original material 14 of cloth, which is the sheet-shaped workpiece 1, is provided. The original fabric 14 is supplied to a spreading machine 16 near the processing table 2, spread on the processing table by the spreading machine 16, and is conveyed to a processing surface 17 by a conveyor structure. The processing surface 17 is a surface in a range that can be cut by the swing of the swing mirror 11. Above the processing surface 17 is covered with a processing chamber hood 19 in which an air supply device 18 is installed, and smoke generated during cutting is exposed to the outside through a lower suction opening 30 and a duct 31 (see FIG. 3) by a plow 20. Is discharged. The workpieces cut into the desired shape are collected on the collecting table 21 at the end of the conveyor. Control and operation of the entire system is performed by the control device 22.

[0004]

[Problems to be solved by the device]

 Since the conventional laser cutting device is configured as described above, when the size of the work piece is small and the ratio of the work surface 17 to the area is small, most of the sucked air is sucked from the opening, A small amount of air is sucked from the cutting line of the work piece. Therefore, there is a problem that the flame generated at the time of cutting cannot be prevented due to the weak suction, depending on the material of the workpiece.

The present invention was made in order to solve the above problems, and an object thereof is to obtain a laser cutting device capable of preventing flame generation by a laser beam even when the size of a workpiece is small. To do.

[0006]

[Means for Solving the Problems]

 In the laser cutting device according to the present invention, a cover plate 40 is provided on a portion of the processing surface 17 where the workpiece 1 does not exist.

[0007]

[Action]

 Since the cover plate 40 in this invention conceals the portion of the processing surface where the workpiece is not present, the suction force sucked from the lower suction opening does not decrease, and the gas generated in the cutting line is immediately sucked and discharged. Therefore, the occurrence of flame can be prevented.

[0008]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to FIGS. Note that the description is omitted for the parts that are the same as the conventional example and are not directly related to the present invention. The processing table 2 has a conveyor structure, and a sheet-shaped workpiece 1 can be placed and moved. Further, the processing table 2 is composed of a large number of pedestals 2a. Each of the pedestals 2a is made up of a plurality of thin plate materials arranged upright at regular intervals, or is made of a honeycomb-like honeycomb or the like, which allows air to flow vertically. A hood 19 is provided with an air supply device 18 on the upper side of the processed surface 17 which is defined by. A lower suction opening 30 of an air suction device is provided below the processing table 2 over the entire processing surface 17. The suction opening 30 is led to the outside by the duct 31, and the blower 20 discharges the suctioned air to the outside. A cover plate 40 is supported by the hood 19 so as to float above the table surface so as not to hinder the movement of the conveyor. This cover plate is installed on a portion of the machined surface 17 where the work piece 1 does not exist, and different size cover plates 40 are installed according to the size of the work piece.

As described above, when the size of the work piece 1 is smaller than the work surface 17, the blank space is covered by the cover plate 40, so that the air suction force of the lower suction opening 30 is reduced. It is possible to prevent the generation of flame when cutting without cutting. Also, since it is not necessary to increase the output of the blower, a blower with a small output is sufficient and it is an energy saving measure.

Example 2. In the above-described embodiment, an example in which the cover plate 40 having a different size according to the size of the workpiece 1 is used is shown. However, if the cover plate 40 is a slide type like a shutter door, and the area covered is variable, Furthermore, the operability is good and the area can be finely adjusted. Further, although the air supply device is taken in from the upper part of the hood 19 in the above-mentioned embodiment, if this is taken in from the outside by a duct (not shown), the air in the work place does not have to be discharged, and air conditioning and temperature control are not required. You can prevent the effect of the key from being weakened.

[0011]

[Effect of the device]

 As described above, according to the present invention, when the work piece is smaller than the work surface, the margin is covered with the cover plate, so that the occurrence of flame can be prevented and the adverse effect of the cut flame can be prevented. You can If the cover plate is a slide type, the operability will be improved and fine adjustment will be possible. Furthermore, if the supply air is taken in from the outside, a laser cutting device that does not impair the effects of air conditioning and temperature control in the workplace can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part according to an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional laser cutting device.

FIG. 3 is a schematic view of the vicinity of a processed surface of a conventional laser cutting device.

[Explanation of symbols]

 1 Workpiece 4 Laser beam 17 Processing surface 40 Cover plate

Claims (1)

[Claims for utility model registration] 1. Laser cutting in which a workpiece is irradiated with a laser beam controlled so as to draw a locus of a predetermined shape, and air is sucked downward from above the workpiece. In the device, a laser cutting device is characterized in that a portion of the processing surface where the object is not present is covered with a cover plate.