阅读说明：本技术 一种光纤激光切割机快速换气的装置及控制方法 (Device for rapid ventilation of optical fiber laser cutting machine and control method ) 是由 程德志 潘望星 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种光纤激光切割机快速换气的装置及控制方法,包括一个空气电磁阀,一个氮气电磁阀,一个氧气电磁阀,一个排气电磁阀和一个五通气路块,所述五通气路块分别与空气电磁阀、氮气电磁阀、氧气电磁阀、排气电磁阀连接,通过氮气电磁阀、氧气电磁阀、排气电磁阀和排气电磁阀结合使用,快速地将五通气路块内和气体输出后端管道内的余气排干净,从而在切割时,再进入气体输出后端管道的气体为干净的纯气体,能够保证整个工件的切割效果和加工效率。本发明的其优势在于：换气时间快,加工效率高。(The invention relates to a device for quickly ventilating an optical fiber laser cutting machine and a control method thereof, and the device comprises an air electromagnetic valve, a nitrogen electromagnetic valve, an oxygen electromagnetic valve, an exhaust electromagnetic valve and a five-way air passage block, wherein the five-way air passage block is respectively connected with the air electromagnetic valve, the nitrogen electromagnetic valve, the oxygen electromagnetic valve and the exhaust electromagnetic valve, and residual gas in the five-way air passage block and a pipeline at the rear end of gas output is quickly exhausted by combining the nitrogen electromagnetic valve, the oxygen electromagnetic valve, the exhaust electromagnetic valve and the exhaust electromagnetic valve, so that during cutting, the gas entering the pipeline at the rear end of gas output is clean pure gas, and the cutting effect and the processing efficiency of the whole workpiece can be ensured. The invention has the advantages that: the ventilation time is fast, and the processing efficiency is high.)

1. The utility model provides a device that optic fibre laser cutting machine takes a breath fast which characterized in that: including an air solenoid valve, a nitrogen gas solenoid valve, an oxygen solenoid valve, an exhaust solenoid valve and a five-way gas circuit piece, five-way gas circuit piece is connected with air solenoid valve, nitrogen gas solenoid valve, oxygen solenoid valve, exhaust solenoid valve respectively, uses through nitrogen gas solenoid valve, oxygen solenoid valve, exhaust solenoid valve and exhaust solenoid valve combination, and it is clean with the exhaust in the five-way gas circuit piece and the gaseous output rear end pipeline fast to when the cutting, the gas that reentrants the gaseous output rear end pipeline is clean pure gas, can guarantee the cutting effect and the machining efficiency of whole work piece.

2. The device for rapidly ventilating the optical fiber laser cutting machine according to claim 1, wherein: the gas output rear end pipeline is communicated with a processing position of laser on a workpiece; the air electromagnetic valve is used for controlling the selection of the processing gas air; the nitrogen solenoid valve is used for controlling the selection of the processing gas nitrogen; the oxygen solenoid valve is used for controlling the selection of the oxygen of the processing gas; the exhaust solenoid valve is used for: when two different processing gases are switched in the processing process, the valve switch is controlled, so that residual gas in the pipeline can be exhausted quickly; the five-way air passage block is used for: connecting the input ports of nitrogen, air and oxygen, the input port of the exhaust solenoid valve and the pipeline at the rear end of the final gas output.

3. The method for controlling the rapid ventilation of the optical fiber laser cutting machine according to claim 1, wherein the method comprises the following steps: when a laser cutting machine with power section of 8kw or below is used for processing stainless steel with thickness of 14mm-25mm, an oxygen perforation and nitrogen cutting mode is adopted; firstly, when the perforation is executed, the oxygen electromagnetic valve is opened, other valves are closed, and only oxygen is output for processing; a small amount of oxygen can be remained in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block, at the moment, the exhaust program after perforation is executed, the nitrogen electromagnetic valve and the exhaust electromagnetic valve are opened, other valves are closed, nitrogen is cleaned in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block and is exhausted through the laser cutting head and the exhaust electromagnetic valve, and after the exhaust time after perforation is finished, the nitrogen cutting program is executed until the cutting is finished.

Technical Field

The invention relates to a device for quickly ventilating an optical fiber laser cutting machine and a control method, in particular to a device for quickly switching gas, which is provided with an air electromagnetic valve, a nitrogen electromagnetic valve, an oxygen electromagnetic valve, an exhaust electromagnetic valve and a five-way air passage block.

Background

The current laser cutting machine with the power range of 8kw and below generally adopts two modes on the processing technology of thick stainless steel (more than 14 mm): nitrogen gas perforation nitrogen cutting and oxygen perforation nitrogen gas cutting, because the sediment that piles up on panel surface is many and hard after the nitrogen gas perforation, damage the nozzle easily, simultaneously easy because the sediment of sword department leads to the cutting head shake and then arouse the unstability of cutting, so the thick stainless steel plate processing is carried out to the mode of oxygen perforation nitrogen gas cutting commonly used. The oxygen perforation nitrogen cutting mode generates little and soft slag, is easy to blow away, and cannot cause instability when the cutter is started, but under the condition that a quick air interchanger is not arranged, the light-off air blowing delay time after perforation is required to be set to be long (generally, 10 seconds are required to be set at least) to ensure that residual gas in the pipeline is exhausted completely, and therefore the processing efficiency is required to be greatly reduced.

Disclosure of Invention

The invention aims to provide a device and a control method for rapid ventilation of an optical fiber laser cutting machine, which are easy to operate, high in efficiency and high in stability.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention discloses a device for quickly ventilating an optical fiber laser cutting machine, which comprises an air electromagnetic valve, a nitrogen electromagnetic valve, an oxygen electromagnetic valve, an exhaust electromagnetic valve and a five-way air passage block, wherein the five-way air passage block is respectively connected with the air electromagnetic valve, the nitrogen electromagnetic valve, the oxygen electromagnetic valve and the exhaust electromagnetic valve, and residual gas in the five-way air passage block and a gas output rear-end pipeline is quickly exhausted by combining the nitrogen electromagnetic valve, the oxygen electromagnetic valve, the exhaust electromagnetic valve and the exhaust electromagnetic valve, so that during cutting, the gas entering the gas output rear-end pipeline is clean pure gas, and the cutting effect and the processing efficiency of the whole workpiece can be ensured.

The gas output rear end pipeline is communicated with a processing position of laser on a workpiece; the air electromagnetic valve is used for controlling the selection of the processing gas air; the nitrogen solenoid valve is used for controlling the selection of the processing gas nitrogen; the oxygen solenoid valve is used for controlling the selection of the oxygen of the processing gas; the exhaust solenoid valve is used for: when two different processing gases are switched in the processing process, the valve switch is controlled, so that residual gas in the pipeline can be exhausted quickly; the five-way air passage block is used for: connecting the input ports of nitrogen, air and oxygen, the input port of the exhaust solenoid valve and the pipeline at the rear end of the final gas output.

The invention relates to a control method for rapid ventilation of an optical fiber laser cutting machine, which adopts an oxygen perforation and nitrogen cutting mode when a laser cutting machine with a power section of 8kw or below is used for processing stainless steel with the thickness of 14mm-25 mm; firstly, when the perforation is executed, the oxygen electromagnetic valve is opened, other valves are closed, and only oxygen is output for processing; a small amount of oxygen can be remained in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block, at the moment, the exhaust program after perforation is executed, the nitrogen electromagnetic valve and the exhaust electromagnetic valve are opened, other valves are closed, nitrogen is cleaned in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block and is exhausted through the laser cutting head and the exhaust electromagnetic valve, and after the exhaust time after perforation is finished, the nitrogen cutting program is executed until the cutting is finished.

Due to the adoption of the technical scheme, the invention has the advantages that:

after the rapid air interchanger is added, the air interchanging time is not more than 2 seconds at most, the processing air interchanging time of a single contour is shortened by 4 times, the unstable cutting condition is greatly solved, and the processing efficiency is greatly improved.

Drawings

FIG. 1 is a block diagram of the structure of the present invention.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The invention discloses a device for quickly ventilating an optical fiber laser cutting machine, which comprises an air electromagnetic valve, a nitrogen electromagnetic valve, an oxygen electromagnetic valve, an exhaust electromagnetic valve and a five-way air passage block, wherein the five-way air passage block is respectively connected with the air electromagnetic valve, the nitrogen electromagnetic valve, the oxygen electromagnetic valve and the exhaust electromagnetic valve, and residual gas in the five-way air passage block and a gas output rear-end pipeline is quickly exhausted by combining the nitrogen electromagnetic valve, the oxygen electromagnetic valve, the exhaust electromagnetic valve and the exhaust electromagnetic valve, so that during cutting, the gas entering the gas output rear-end pipeline is clean pure gas, and the cutting effect and the processing efficiency of the whole workpiece can be ensured.

The gas output rear end pipeline is communicated with a processing position of laser on a workpiece; the air electromagnetic valve is used for controlling the selection of the processing gas air; the nitrogen solenoid valve is used for controlling the selection of the processing gas nitrogen; the oxygen solenoid valve is used for controlling the selection of the oxygen of the processing gas; the exhaust solenoid valve is used for: when two different processing gases are switched in the processing process, the valve switch is controlled, so that residual gas in the pipeline can be exhausted quickly; the five-way air passage block is used for: connecting the input ports of nitrogen, air and oxygen, the input port of the exhaust solenoid valve and the pipeline at the rear end of the final gas output.

The invention relates to a control method for rapid ventilation of an optical fiber laser cutting machine, which adopts an oxygen perforation and nitrogen cutting mode when a laser cutting machine with a power section of 8kw or below is used for processing stainless steel with the thickness of 14mm-25 mm; firstly, when the perforation is executed, the oxygen electromagnetic valve is opened, other valves are closed, and only oxygen is output for processing; a small amount of oxygen can be remained in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block, at the moment, the exhaust program after perforation is executed, the nitrogen electromagnetic valve and the exhaust electromagnetic valve are opened, other valves are closed, nitrogen is cleaned in the five-way air passage block and the pipeline behind the gas output port of the five-way air passage block and is exhausted through the laser cutting head and the exhaust electromagnetic valve, and after the exhaust time after perforation is finished, the nitrogen cutting program is executed until the cutting is finished.

The invention has the advantages that: the ventilation time is fast, and the processing efficiency is high.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.