Reach its to make medium application in agriculture machinery by Laser Cutting technology

The China of development existing state of affairs of industry of 1 agriculture machinery is agricultural big country, agriculture is national lifeblood, development of mechanization of farming is agricultural development is important assure. Manufacturing industry of machinery of our country agriculture is after new China holds water, from do not have those who work up rises, with production promotion from supplementary and old-style farm tool new-style farm tool starts. Industry of our country agriculture machinery passes development of 50 years, already formed tractor, internal-combustion engine, cultivation machinery of mechanical, plant protection machinery, results machinery, irrigation and drainage, carriage machinery, pasturage machinery, farming farm tool of machinery of treatment of by-product treatment machinery, feed, half mechanization, procrastinate inside 13 small industries such as fittings, can produce 16 kinds big, the whole industry system of a variety of 104 group, 3200 products, make level of our country mechanization of farming rises ceaselessly, promoted the tremendous change of structure of labor of our country agriculture, made important contribution to the development of our country agriculture and rural economics. Although gross of Chinese agriculture machinery develops quickly, but huge population cardinal number still makes average per capita of Chinese agriculture machinery retains the quantity is in the world under average level, integrated mechanization level is made an appointment with only 48% , present apparent structural sex disequilibrium: Small-sized machinery is more and large and medium-sized mechanical machinery of less, motivation is more and level of mechanization of less, tractor-ploughing is showing machine of form a complete set prep above machine is sowed and machine close, level of grain crop mechanization is general crop of prep above economy, highland mechanization still is in start level. In the meantime, as a result of the agricultural machinist of our country dimensions of course of study slants generally small, product technology content is inferior, new technology and new facility get very good promotion hard again, caused whole of agriculture machinery industry to develop horizontal lag. 1.

The industrial feature that the characteristic that the agriculture of the industrial feature our country of 2 agricultural machinery produces decided our country agriculture is mechanical directly has diversification of breed of agriculture machinery sort, the technical difficulty of agriculture machinery size contrast is very big, and agriculture machinery uses requirement dependability tall, adaptability is strong, especially the cycle of agriculture machinery scientific research, production is long, devoted big. In agricultural production, those who cultivate course of study, forestry, fishery reclaim, cultivate and results gets seasonal influence, experiment of design of course of agriculture machinery development, trial-produce, function, production experiment, promotion sets an example in waiting for measure ability to use production, go; Manufacturing experiment and promotion set an example to get agriculture is seasonal restrict, those who miss production is seasonal operating mode environment, can wait for next year reentry to go only, so, the birth of a kind of new model, general need passes 3 ～ 5 years, some is longer even. Because scientific research of this agriculture machinery is periodic long, the material resources that use up and labor power are much. 1.

The pressing demand our country that 3 agriculture machinery make pair of contemporary processing technique is current although had become the manufacturing big state of agriculture machinery, but production technology of our country agriculture machinery and equipment standard and developed country photograph are compared, still make an appointment with the difference that 20 arrive 30 years. The equipment of the enterprise spends coefficient newly very low, difference is very big. Some forefront production facilities are a developed country even 20 centuries 5, the product of 60 time. Even equipment of old company of a few backbones spends coefficient newly to be only 0.

3 ～ 0.

4, far under other machinery industry 0.

6 ～ 0.

The general level of 7, equipment stale, the product pledges the quantity is controlled hard; Accordingly, agriculture machinery manufacturing industry raised pressing requirement to new-style treatment means, wait like technology of CAD/CAM, laser beam machining, numerical control and automation technology, the application of these advanced techniques, will accelerate our country agriculture machinery to make modern progress, the article basically will discuss Laser Cutting technology to reach its to apply in the research of agriculture machinery manufacturing industry. The principle laser technology of technology of Laser Cutting of 2 numerical control is one of inventions with 20 great centuries, since the first laser came out 1960, solid laser (Nd: YAG) , aeriform laser, semiconductor laser and accurate element laser are born in succession; Laser is different from common light source, it has good monochromatic sex and coherence, very good directional, extremely high energy density, these characteristics make laser applies at domain of of all kinds machining widely, like Laser Cutting, solder, laser quenchs, laser hits mark to wait a moment, and Laser Cutting is considered as the laser is the most mature craft in technical application. Laser Cutting is the laser after using focusing bundle illuminate is in by the surface of cut material, light energy is changed into heat energy, inside the time that counts small second, the temperature of facula area is elevatory the melting point to material even boiling point, material is fused and vaporization, a diameter is hit for the alveolus of 100 μ M, should stimulate beam of light to move along the method of set, beam of light and data are constant interaction, kerf is formed subsequently, in this one process, auxiliary gas has blown kerf through cut mouth, its action has 3: Aid cut (oxygen occupies the quantity of heat of 60% to offer on carbon steel cut) , blow slaggy with refrigeration. the quality of Laser Cutting (the surface roughness that includes the linearity that cuts seamed width, margin and cut section) by mode of laser power, laser (it is low rank model, single standard normally) with the polarization (round polarization) , auxiliary gas pressure and cut speed. The Laser Cutting of 　 of main good point of technology of Laser Cutting of 3 numerical control is the most advanced cut technology on current world, be like the photograph such as cut of efflux of water of blaze cut, Plasma Cutting, high pressure with other cut craft very huger than having advantage, its machined an object to include all metals and metalloid material almost, the material that can burn to tall hardness, tall brittleness, Gao Rong has the cut of three-dimensional and stereo spare parts with complex form, this also is the advantage place of technology of numerical control Laser Cutting. 3.

1 laser power is high, cut quality is good: Stimulating beam of light is the heat source of high energy density, cut mild steel, cut width can is less than 0.

1 ～ 0.

2mm, cut surface surface roughness has ten micron only, the precision of cut part can amount to ± 0.

05mm, the part of Laser Cutting is accordingly good because of cut quality, often need not machining and use directly. 3.

2 inputs quantity of heat small, material is out of shape function of small, material suffers an effect small: Because stimulate the power density of beam of light extremely tall, the heat when cut affects area minimum, have 0 only commonly to thin plate.

01 ～ 0.

1, material is out of shape near cut very small, function suffers an effect scarcely. 3.

3 treatment are flexible good: Laser Cutting need not any cutting tool and mould, laser is conducted through optical lens, cut process can realize full numerical control, in the computer control falls, can come true directly 2 dimension, three-dimensional on of aleatoric appearance board kind with housing kind of the spare parts flexible treatment, special the Ban gold that applies to new product to develop the much variety that develops level, small lot kind the treatment of the spare parts, but the mould design with leave out very high cost, production cost, huge shortens production is periodic. 3.

4 cut efficiency is tall: With 1mm large carbolic board is exemple, cut speed can amount to 40m/min, efficient make odd finished cost is reduced progressionally into geometry, machine a method under the tradition even. 3.

5Laser Cutting contacts optical hot-working to be not, be known as never tatty is all-purpose cutting tool: Stimulate beam of light to wander in spare parts surface can realize cut function, workpiece outfit card is simple, do not need to hold card even, and the close together platoon that workpiece can have aleatoric form expects or cover cut into parts, make raw material gets applied adequately, because dispute contacts treatment, the workpiece after treatment does not have any is out of shape. Technology of Laser Cutting of 4 numerical control makes medium application in agriculture machinery agricultural machinery is phyletic and various, change rapid, new product develops cycle to grow, and the product of most sort belongs to small lot production, the Sheet Metal Fabrication of agriculture machinery product use board of 4 ～ 6mm commonly, board gold sort is much, and update fast, board gold adds traditional agriculture machinery product workpiece uses punching machine means normally, the mould is used up big, normally a large agriculture machinery produces the storeroom nearby 300m2 that plant family expenses deposits at the mould, this shows, if the treatment of agriculture machinery component still stays in traditional pattern, change what restrict a product badly quickly develop with the technology, and of technology of numerical control Laser Cutting flexible treatment advantage came out now with respect to body. CNC Milling CNC Machining