Laser engraving machine carved painting processing principle and characteristics

Laser processing laser beam is high brightness, high power, high directivity characteristics of a kind of technology application.Its basic principle is to has enough power (or energy) after focusing laser beam irradiation to material parts, appropriate material in laser within 10 to the minus 11 power seconds after started to turn light energy into heat energy, be as heated up fast.Depending on the lighting parameters, material can be gasification and melting, the microstructure changes and generate considerable thermal stress, so as to achieve the workpiece material has been removed, connect, modification and separation processing purpose.

The characteristics of laser engraving machine carved painting processing:

(1) strong adaptability.Processing of various materials, including high hardness, high melting point, high strength and brittleness, soft materials;As well as in the atmosphere for processing, can be processed in the vacuum.
(2) the high machining precision and good quality.Due to the laser of high energy density and non-contact flexible manufacturing, and can finish in an instant, so the thermal deformation of workpiece, and no mechanical deformation, the tip of small parts and processing is very good.
(3) high machining efficiency, good economic benefit.In some cases, the laser cutting efficiency can be improved using 8-20 times, the direct costs of laser drilling can save 25% 75%.

There is no stamping device of laser engraving machine punched way

Any kind of hot carving technology, besides the minority can begin from the edge of the plate are generally required a small hole on the plate. Earlier in laser punching compound machine is with a hole punch out first and then begin from the holes by laser engraving. With no stamping device of laser engraving machine has two kinds of the basic ways of perforation:

(1) to break the perforation: material after continuous laser irradiation in the formation of laser beam and a pit and then by coaxial oxygen flow quickly remove the molten material into a hole.General hole size and thickness of the uniform blast hole diameter to thickness of half so for thicker plate blasting perforation aperture is bigger, and do not round, shoulds not be used on demand higher parts (such as oil sieve tube), can only be used for waste. In addition for perforation of oxygen to the same pressure and sculpture, splash is bigger.
(2) pulse perforation: the peak power of pulse laser makes a small amount of material to melt or boil commonly used as auxiliary air or nitrogen gas to reduce make hole expanding vapour pressure with exothermic oxidation is carving the oxygen pressure is small. Each pulse laser to produce only a small particle injection, gradually thorough, so thick plate punch time takes a few seconds. Once the perforation completed should be carved carved to replace auxiliary gases with oxygen. Perforation diameter is small, so the quality is better than that of blasting hole perforation. Therefore the use of laser should not only have high output power;More important in time and space characteristics of beam so generally out of our fleet laser can not adapt to the requirement of laser engraving machine.

Pulse perforation also need to have a reliable pneumatic control system so as to realize the switch of the gas type, gas pressure and aperture time control. In the use of pulse perforation. Clear condition, in order to obtain high quality of incision, from workpiece resting pulse perforation to the transition of workpiece constant continuous carving technology should face up to. In theory usually change accelerating period of carving the premise: such as focal length, position of nozzle, gas pressure, but because time is too short to change the above premise is unlikely.

Clever through special noise prevention cutting knife carving machine operation

Engraving machine during operation, if there are different from the usual noise main shaft, we need special attention, carving factory technicians to accumulate through long-term experience and practice examination, the reasons of abnormal boils down to two points:

(1) special noise source, we should start from axial motor, see if there are any damage, or x guide lack of lubricating oil, dirty, too close, ball wear, ball drops wait for a special noise will appear, when begin from the inspection found that the problem must be handled in time, avoid by all means cause an effect to work.
(2) engraving machine machine aging also can appear special noise, serious will be cutting knife, this is because the main shaft bearing quality problems, or by the causes for too long, wear quality declining after damage, consider replacing spindle bearing.

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