Brief Introduction to CO2 Laser Working Principle and Classification

The carbon dioxide laser was first used in 1964 with a wavelength of 10.6 μm. Because this is a very efficient laser, as a commercial model for its conversion efficiency of 10%, so carbon dioxide laser widely used in laser cutting, welding, drilling and surface treatment. As a commercial application of laser up to several kilowatts, which is currently the strongest material handling laser.

1.The operating principle

Carbon dioxide laser is a molecular laser. The main substance is carbon dioxide molecules. It can express a variety of energy state which depends on its vibration and rotation of the form may be. The mixed gas in the carbon dioxide is a plasma (plasma) formed by low-pressure gas (usually 30-50 torr) due to electron release. As in the Maxwell-Boltzmann distribution law, in the plasma, the molecules exhibit a variety of excited states. Some will exhibit a high energy state (00o1) which behaves as an asymmetrical swing state. When the collision with the hollow wall or natural distribution, this molecule will accidentally lose energy. This high-energy state will naturally descend to a symmetrical wobble (10o0) and radiate a photon (a 10.6μm light beam) that may propagate in any direction. Occasionally, a kind of photon that will travel down the cavity of the optical axis will also swing in the resonance mirror.

In general, carbon dioxide laser working material is composed of carbon dioxide, helium, nitrogen mixture. Nitrogen acts as a buffer gas as well as its molecules resonate to deliver energy to the carbon dioxide molecules. Because the level of relaxation is the bottleneck, the helium acts as a heat sink to deliver energy to the helium atoms.

2.The type of carbon dioxide laser

Waste heat rejection of the way the laser system design has a great impact. In principle, there are two possible ways. The first way is based on automatic processing of natural diffusion of hot air to the pipe wall, the operating principle is sealed and slow axial laser. The second is based on gas forced convection, its operating principle is fast axial laser. In general, there are five main types of carbon dioxide laser:

Sealed or no flow

Slow axial flow

Fast axial flow

Fast horizontal flow

Horizontal excited atmosphere (TEA)

Sealed or flowless carbon dioxide lasers are usually marked with a laser for beam deflection. Its discharge tube is completely sealed. The quality of this laser beam is very good. And in most cases the entire discharge tube can be replaced with old and new can be re-filling so easy to maintain. This eliminates the need for a separate gas supply system. Only need to do less in the laser head connection. So it is both compact and lightweight. But its energy output is low (usually less than 200 watts).

TEA carbon dioxide laser is usually used in the manufacture of protective cover. Can only operate in the pulse situation. Low air flow and high pressure. Its excitation voltage is about ten thousand volts. The distribution of the laser beam energy in the relatively large area is uniform. Its maximum energy can reach 1012 watts and its pulse width is very small. However, this type of laser is difficult to concentrate at a small point due to the multi-state operation.

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operation.

Automatic soldering machine classification

Automatic soldering machines, also named as automatic soldering robots, automatic welding robots, etc., is a substitute for manual welding of the machine. With the enterprise labor costs become higher and higher, this replacement of artificial welding tools are more and more accepted by factory. At the same time, due to the development of science and technology in China, China's technological gap and the level of the world is getting smaller and smaller, some companies began to imitate Japan's technology, automatic soldering machine localization level is higher and higher, and catch up with the Japanese Trends. Especially in recent years, no matter from the accuracy or temperature, China's soldering machine can compared with Japan's soldering machine.

Automatic soldering machine classification:

First, the automatic soldering machine by axial points:

1, single-axis automatic soldering machine

2, two-axis automatic soldering machine

3, three-axis automatic soldering machine

4, four-axis soldering machine

5, four-axis soldering machine

Second, according to the motor type

1, Stepper motor-based automatic soldering machine

2, The servo motor-based automatic soldering machine

Third, according to the type of control

1, Single-chip control-based automatic soldering machine

2, PLC-based automatic soldering machine

Four, according to the number of welding points

1, Single-head automatic soldering machine

2, Double-headed automatic soldering machine

3, Three automatic soldering machine

4, Long automatic soldering machine

Five, according to the way to divide the solder

1, Contact-type soldering machine ------- soldering iron

2, Non-contact welding ------- laser soldering machine

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capacitor soldering machine

customized stripping machine for wire cable

Stripping four group wire cables together, good performance.

Customized stripping machine base on wire cable.

Sinrad Technology

stripping and cutting machine for usb cable assemble

robotic soldering machine application

Automatic soldering machine is common application in the production, wave soldering and reflow, and now widely used in post-welding process of automatic solder robot, is commonly used in automated solder equipment, automatic soldering machine for automatic welding pin, Iron, connectors and other products, spot welding, drag welding. At present, the automatic solder technology has become the mainstream of the industry trend, Sinrad technology co., ltd will introduce the robotic soldering machine’s application.

Solder application technology development, but also to expand its application areas, is currently widely used in automotive electronics, home appliances, spare parts, LCD, circuit boards and other advanced manufacturing industries. Automated solder technology has become the mainstream of the development of the relevant industry trends, automated solder equipment in the following occasions, the application has a pivotal role.

(1) In the aerospace, defense, aviation, automotive and communications equipment industries, in order to ensure the welding accuracy and solder joints in different extreme conditions of reliability, automatic welding technology is the best choice.

(2) Devices that are sensitive to temperature and can not pass through reflow soldering and wave soldering, such as connectors, DIP packages, shields, sensors, transformers, cables, cables, speakers and motors.

(3) mixed circuit board, rigid and flexible combination board, soft and hard combination board, with three-dimensional structure or stack design of the workpiece limits the wave soldering and reflow soldering and other production equipment.

(4) small batch production or trial production, will not use the complex production methods or expensive large equipment.

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Laser marking in the application of medical products

In the medical industry, the identification code is mainly reflected in the pharmaceutical and medical equipment. As the inkjet marking method is easy to fall off caused by tampering, but also often because of paint containing toxic substances and environmental pollution and other factors do not meet the medical industry safety standards. In this environment, the medical industry in urgent need of a product management is conducive to safe and environmentally friendly processing products to prevent bad businessmen will be mixed with medical products into the hospital endangering human health. Therefore, the use of "non-contact" processing, green, anti-off a new generation of marking methods laser marking - to subvert the medical industry's new technology.

Laser marking to bring benefits to the medical industry

Laser marking for the physical removal of processing methods, hit out the product logo is not easy to wear, can not be changed, with a strong anti-counterfeiting and uniqueness, easy to achieve a "one medicine one yard" for medical products manufacturers brought great the benefits of. It is perfect with the medical device product trace ability system, you can maximize the safety and control of the product to avoid the product was tampered with the phenomenon.

Application of Laser Marking in Drugs

Laser Coding Equipment can be easily in the kit or drug packaging on the two-dimensional code and drug monitoring of the marking, to help the product trace the source, with authenticity, trace ability. Through the laser marking out of the drug supervision, to help drug monitoring departments to fully monitor the production factory, circulation, transportation, savings, distribution and other processes.

Application of laser marking in medical equipment

The use of laser marking machine in the stainless steel surgery and dental equipment and other medical equipment on the mark, easier to read, after numerous disinfection and cleaning of the mark is still clearly visible, and can effectively prevent the bacteria stick to the surface of the equipment.

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