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| Excavator bucket teeth laser processing |
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The principle of excavator bucket tooth processing
Laser processing is through the lens focal to spring full density is very high energy utilization. Relying on the photothermal effect removal method for machining the workpiece excess material.
Laser is a kind of nourishing the radiation strengthening withstand light. It has high brightness, high directivity, high monochromaticity and Gao Xiang in four comprehensive performance. Through the optical system can be obtained, the beam focal into dozens of meters to several emblem emblem small spot meter diameter. Which will be on the density is increased to l0¡¯- 1010 W/cm¡¯. When the beam to the workpiece surface. The light is absorbed and rapidly converted to heat the workpiece. The irradiation spot temperature rises rapidly, melting, gasification and the formation of small pit. Due to thermal expansion so. Make dot Thursday metal melting, small pit metal Yan expansion of the vapor. Produce badge type want to blow. The spraying molten touch high speed and produces a strong directionality of anti shock wave, so in the machined surface of a hole.
2 the processing characteristics
Laser processing has the following characteristics.
(1), optical processing. High density. The power density of.0¡¯1010 W/cm¡¯, can be a variety of metal materials and non-metallic materials.
(2) laser processing without obvious mechanical force. There is no tool loss, high processing speed, small heat affected zone, easy to realize the automation of machining process.
(3) for processing of the workpiece through the glass, the material can be laser. As for the vacuum tube devices such as Na.
(4) the laser spot can be to focus Chenghui meters, and can be adjusted on the output size, it can be precise, fine processing.
(5) the average processing precision. .Olmm. the highest precision can reach 0.001mm, surface rough degree of olive R, up to 0.4-0.1 Bu M.
3 van day
Laser surface heat treatment, welding, cutting, drilling, carving and side service emblem fine processing and other processing.
(a) laser drilling
The laser can be processed in special parts and special material hole, such as the rocket engine nozzle, chemical fiber spinneret plate, watch jewel bearings and polycrystalline diamond wire drawing die and other parts of the emblem hole machining. The efficiency of laser drilling is very high, for example, by mechanical method for diamond chess punch. Need 24h; and YAG, laser drilling. Only 2S, power density, light punch is generally 10¡¯l0¡¯ W/cm¡¯,
(2) the emblem of light cutting
The power density of laser cutting side of the general is about 10, lo, w/..,. It can cut Li metal material, can be cut and non metal materials. Also the filament tube into the glassy exact side vacuum, which is the unique function of laser processing. High power CO, continuous gas laser light olive extract is widely used in cutting steel, gang of alloy plate, quartz and ceramic, plastic, wood, paper, board and cloth; solid, light John a pulsed laser used in semiconductor wafer cutting side and chemical fiber spinning head shaped holes processing etc..
(3) laser welding
Use mayonnaise light irradiation of highly concentrated energy, the workpiece processing zone "hot" together. Laser Na connected without solder and Na Jing. Only Yu power density, beam 10¡¯- 10¡¯ W/cm¡¯, irradiation of about 1/100. Time to. Laser welding process quickly, small heat affected zone, the welding quality of t high, regardless of the same material or different materials and connected, even through the glass container with internal material. Car parts are over SO%, optical processing, including laser, then accounted for 40%, the methods of nourishing light welding can save cost. To reduce assembly time, liquid fatigue strength than spot welding. Impact resistance, corrosion resistance is also improved.
(4) the laser surface treatment
For cast iron, carbon steel and other materials. Even the agricultural surface quenching can laser. The depth of the hardening layer is 0.7-1. 1mm, withered permeable layer hardness than conventional thin fire about 20%, power density, optical surface quenching was about 10¡¯-10¡¯ W/cm¡¯. |
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