The Service Life and Extension Methods of the Laser Generator in CO₂ Laser Cutting Machines

Introduction

General Service Life of the Laser Generator

Factors Affecting the Service Life

Working Environment

1. Temperature and Humidity:The suitable temperature range is 15 - 35°C, and the relative humidity should be maintained at 40% - 60%. When the temperature exceeds 35°C, the internal optical and electronic components of the laser generator may deteriorate in performance due to overheating and age more rapidly. If the humidity exceeds 60%, the components may get damp, leading to short - circuits.
2. Dust and Impurities:Dust and impurities in the working environment, once entering the laser generator, can adhere to the optical lenses, affecting laser transmission and focusing, reducing power, and wearing parts. For instance, in a stone - cutting workshop with much dust, the lenses of the laser generator are likely to be contaminated.

Usage Patterns

1. Power Setting and Operating Duration:Operating at a high power for an extended period, such as above 80% of the rated power, may reduce the service life by 20% - 30%. Continuous operation for long hours without sufficient cooling and rest is also detrimental.
2. Frequency of Start - up and Shutdown:Frequent start - up and shutdown subjects the components to electrical current surges, easily causing damage. The high - current during each start - up exerts pressure on components like the power module and electrodes.

Maintenance

1. Cleaning and Calibration:Regular cleaning of optical lenses, mirrors, etc. is necessary. Otherwise, dirt on the lenses absorbs laser energy, causing them to heat up and deform, affecting the output. Regular calibration of the optical path ensures efficient laser utilization.
2. Gas Management:The purity, pressure, and flow rate of the working gases are crucial. Low - purity gases may cause chemical reactions inside the generator, corroding components. Unstable pressure and flow rate affect laser generation and output.

Methods to Extend the Service Life

Optimize the Environment

1. Regulate Temperature and Humidity:Install air - conditioners and dehumidifiers. Pay attention to cooling in summer, controlling the temperature at 15 - 35°C and humidity at 40% - 60%.
2. Dust - proof and Purification:Equip with dust covers or air - purification devices, clean the surroundings regularly, and install dust - proof mats at the workshop entrance to filter the air.

Standardize Usage

1. Control Power and Duration:Set the power according to materials and processes, preferably at 60% - 70% of the rated power. After 4 - 6 hours of continuous operation, stop for 30 - 60 minutes.
2. Reduce Start - up and Shutdown Times:Minimize unnecessary start - up and shutdown in production arrangements. Set the equipment to standby for short - term pauses. Wait for the circuit to stabilize before restarting.

Strengthen Maintenance

1. Regular Cleaning and Calibration:Clean the lenses every 100 - 200 hours using special tools and reagents. Calibrate the optical path every 500 - 1000 hours.
2. Gas Management and Monitoring:Use high - purity gases, regularly check the supply system, and install purity monitoring equipment. The purity of CO₂ should be above 99.99%, and that of nitrogen and helium should be above 99.995%.

Conclusion