JPH0243584Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a laser beam burn pattern collecting device.

[Conventional technology]

In a laser processing machine, an acrylic plate is irradiated with a laser beam, which heats and melts the acrylic plate, creating a hole shape (hole diameter d, depth h) as shown in Fig. The characteristics of the laser beam are evaluated based on the shape of the holes and the shape of the holes, which is called a burn pattern.

FIG. 2 is a front view of a conventional device for collecting burn patterns, in which 1 is a laser beam, 2 is its conduit, 3 is an acrylic plate, 4 is a leg that supports it, 5 is a table 6 is a gas cylinder, 7 is a chitso gas spray nozzle. When collecting the burn pattern, the laser beam 1 is irradiated onto the acrylic plate 3 while blowing titanium gas, and the acrylic plate 3 is heated and melted by the irradiation of the laser beam 1, and the holes formed are the burn pattern. .

[Problem that the invention attempts to solve]

According to the above method, when the acrylic plate 3 is heated and melted by the irradiation of the laser beam 1, combustion gas is generated, and this gas is irradiated with the laser beam 1.
alter its intensity distribution, absorb or refract some of its output, and
The problem was that it was difficult to obtain an accurate burn pattern corresponding to the characteristics of the laser beam 1.

The purpose of this invention is to solve the above problems by reducing the amount of combustion gas generated by laser beam irradiation.
It is an object of the present invention to provide a burn pattern acquisition device that does not adversely affect laser light.

[Means for solving problems]

In order to achieve the above-mentioned purpose, this invention provides a collection box with a casing surrounding the acrylic plate, and attaches a gas exhaust duct to the box to suck in and exhaust the acrylic combustion gas generated by laser beam irradiation. That is.

[Effect]

A fan and a gas exhaust port are connected to the gas exhaust duct attached to the collection box, which absorbs the combustion gas generated by laser beam irradiation and dissipates it into the atmosphere. Make sure that no gas is present at all.

〔Example〕

FIG. 1 is a front view showing an embodiment of the present invention.
5 is completely the same as the conventional device, and its explanation will be omitted. 8 is placed on the table 5, and the acrylic plate 3
A burn pattern consisting of a casing 9 whose upper opening is connected to the lower end of the conduit 2 and formed to surround the acrylic plate 3, and a gas exhaust duct 10 attached to an opposing vertical wall surface of the casing 9. It is a collection box. 11 is a fan connected to the gas duct 10, 12 is a gas exhaust port following the fan 11, and 13 is a shutter to be described later.

In the figure, the combustion gas generated by the irradiation of the laser beam 1 onto the acrylic plate 3 is transferred to the gas duct 10.
The gas is sucked in by the fan 11 and released into the atmosphere from the gas outlet 12. In addition, the laser light introduction pipe 2
The shutter 13 provided at the connection between the casing 9 and the casing 9 is closed immediately after the laser irradiation is completed to prevent combustion gas from entering the pipe line 2.

[Effect of idea]

In the burn pattern sampling device, the acrylic plate is surrounded by a casing, and the acrylic combustion gas generated by laser beam irradiation is sucked and exhausted outside the casing using a gas exhaust duct, fan, etc. The negative influence on light is removed, making it possible to collect an accurate burn pattern of laser light.

[Brief explanation of the drawing]

FIG. 1 is a front view of a burn pattern collecting device showing an embodiment of the present invention, FIG. 2 is a front view of a conventional device, and FIG. 3 is a sectional view of the burn pattern. In the figure, 1 is a laser beam, 2 is a pipe, 3 is an acrylic plate, 5 is a table, 6 is a Chitsuso gas cylinder, 7 is a Chitsuso gas spray nozzle, 8 is a burn pattern collection box, 9 is a casing, and 10 is a gas exhaust duct. , 11 is a fan, 12 is a gas exhaust port, and 13 is a shutter. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] In a laser beam burn pattern collecting device,
A conduit for guiding the laser beam is connected to the table of the device, and a burn pattern sampling box is equipped with a combustion gas exhaust duct, and a burn pattern is collected by connecting a fan and a gas exhaust port to the combustion gas exhaust duct. A burn pattern sampling device characterized by being configured so that gas generated during sampling can be released into the atmosphere.