Rotary flow guide type air draft system of laser cutting machine

Abstract

The invention discloses a rotary flow guide type air draft system of a laser cutting machine. The rotary flow guide type air draft system comprises longitudinal beams, a left air guide pipe, a right air guide pipe, a first cross brace, a second cross brace, bottom braces and rotary opening and closing mechanisms, wherein the left air guide pipe is welded to the left longitudinal beam, the right air guide pipe is welded to the right longitudinal beam, and the two ends of the first cross brace are respectively welded to one ends of the two longitudinal beams; the two ends of the second cross brace are welded to the other ends of the two longitudinal beams respectively and communicated with air draft openings in the longitudinal beams, the end of the left air guide pipe and the end of the right air guide pipe are welded to the first cross brace and communicated with the second cross brace, the two ends of the bottom braces are welded to the two longitudinal beams correspondingly, and therotary opening and closing mechanisms are connected with the left air guide pipe and the right air guide pipe. a double air draft air duct formed by the left air guide pipe and the right air guide pipe is used for carrying out air draft operation, so that the air draft efficiency is high, and the heat dissipation effect is good; and the segmented air draft is achieved, an air draft fan operates ata low load, the energy consumption is low, and the noise is low.

Description

technical field [0001] The invention belongs to the technical field of laser cutting machine, in particular, the invention relates to a rotary guide type exhaust system of a laser cutting machine. Background technique [0002] The principle of the laser cutting machine is: the heat input by the beam far exceeds the reflected, conducted or diffused part of the cut material, and the material is quickly heated to the vaporization temperature, and evaporates to form holes. [0003] As the beam moves linearly relative to the material, the holes are continuously formed into a slit with a very narrow width (such as about 0.1mm). The heat effect of trimming is very small, and there is basically no deformation of the workpiece. During the cutting process, auxiliary gas suitable for the material to be cut is also added. When cutting steel, oxygen must be used as an auxiliary gas to produce an exothermic chemical reaction with molten metal to oxidize the material, and at the same tim...

AI Technical Summary

Problems solved by technology

[0008] 1. Due to the multiple heat dissipation holes set on the middle beam, each section separated by the brace is in a normally open state, and segmental ventilation cannot be realized, so that the exhaust fan is always running at high load, with high energy consumption and high noise

[0009] 2. There is only one hollow middle beam set in the middle as the ventilation duct, and the single ventilation duct has low ventilation efficiency and poor heat dissipation effect

[0010] 3. The hot gas entering the middle beam from the heat dissipation holes on both sides of the middle beam at the same time collides, which makes the draft resistance large, and the exhaust fan needs to run at high load all the time, which consumes a lot of energy and makes a lot of noise

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