Technology of laser beam machining is in agricultural the application in the car

The power density that reason can make the focus is in achieves 105 ～ 1013 W/cm2.

Temperature can amount to above of C of 10 thousand ° . Below such high temperature. Any material fuse instantaneous quickly and vaporization, volatile high speed eject comes out, generation is directional at the same time very strong impact. Accordingly, laser beam machining is workpiece produces high temperature below smooth fuel factor melt and suffer bow wave to cast the integrated course that give. The characteristic of the characteristic laser beam machining of 2 laser beam machining basically has the following sides: It is almost right all metals and metalloid material can undertake laser beam machining; 2 it is the facula that stimulates light energy focusing to become minimum.

Can undertake nicety is machined be mixinged imperceptibly.

If seam the treatment with small hole curtilage imperceptibly: 3 it is to be able to use illuminator to will stimulate beam of light send toward the segregation room that is far from laser or other place to undertake machining; 4 it is to add man-hour not to need cutting tool, belong to blame contact treatment. Do not have machining to be out of shape: 5 it is to need not machine tool and special environment, facilitating automata is machined continuously.

Treatment efficiency is tall, treatment is out of shape and heat is out of shape small. Technology of 3 laser beam machining is in agricultural the application in auto industry 3.

1Laser Cutting Laser Cutting uses the CO2 laser of high-power mostly, also can use YAG laser to careful cut. Laser is OK cut metal, OK also cut is metalloid. In Laser Cutting process. Give birth to mechanical concussion and pressure to be not being produced by cut material as a result of laser, cut plus Laser Cutting seam small, facilitating automata, reason uses treatment glass, pottery and porcelain and the component with all sorts of petty nicety in actual middling. Laser Cutting with its cut limits rate of wide, cut is high, cut seam quality of narrow, cut area of good, hot influence small, treatment is flexible the gender is big wait for an advantage, get applied extensively in modern industry. Be in agricultural in the course of study below the car.

Automobile body enclothes a three-dimensional outline to use Laser Cutting to be able to improve cut efficiency 8 ～ 20 times, economic data 30 ％ of 15 ％ ～ , reduce manufacturing cost substantially thereby. And treatment precision is tall, product quality is reliable. 3.

2 laser solder to be Cm2 of ／ of 105 ～ 107 W when the power density of laser, when irradiation time is controlled for 1 ／ 100 S about, can undertake laser solders. Laser beam welding is received general need not solder and welding flux, need workpiece to machine area " to heat up frit " to be together only can. Laser beam welding receives rate fast, hot influence area is small, solder quality is high, can solder akin material.

Also can solder heterogeneous material, still can undertake soldering through glass. In agricultural auto industry, laser technology basically is used at automobile body to spell solder, solder with the spare parts. Laser spells solder is in automobile body the design is made in, according to automobile body different design and function ask, choose the stencil steel of different specifications.

Finish automobile body through laser cuts out and spelling outfit technology of some ～ place make.

For example before inside windshield frame, door board, automobile body motherboard, central post. Laser spells solder to have reduce spare parts and mould amount, reduce spot welding number, optimize material dosage, reduce spare parts weight, reduce cost and raise dimension precision to wait for advantage.

Already was made at present how old agricultural car manufacturer and fittings supplier are used. Laser beam welding receives what basically be used at structure of automobile body frame to solder.

For example coping solders with what side builds automobile body, and the resistor spot welding of method of traditional welding flux already was soldered by laser gradually be replaced. Use laser beam welding to receive a technology. Workpiece joins the joint range breadth between can decrease, can reduce plank to use an amount already. Can raise bodywork again stiffness, the spare parts solders place was not out of shape almost. Solder rate is rapid.

And the heat treatment after needing solder. Current, laser beam welding receives component common wait at hinge of tappet of transmission gear, valve, door. 3.

When 3 laser quench when laser power density is 103-105 W/cm2 about. Can come true right cast-iron, medium carbolic iron even the material such as mild steel undertakes laser surface quenchs. Quench layer deepness is commonly 0.

7 ～ 1.

1 Mm, quench layer hardness quenchs than convention about tall 20 ％ . Laser quenchs be out of shape small. The surface that can solve mild steel quenchs aggrandizement problem. Quench in laser in the process, very big degree of superheat and degree of supercooling can make the grain of hard layer of temper by dipping in water extremely fine, wrong density is extremely high and form in surface layer press stress.

The wearability that improves work greatly then, fight fatigue, anti-corrosive, fight the function such as oxidation. Prolong the service life of workpiece. Laser quenchs the technology is in agricultural the application in the car basically includes agricultural car engine air cylinder covers wall, crankshaft, camshaft, exhaust valve, valve base to wait. Italy the company uses Feiyate HPL one 10 model cylinder of laser processing engine covers wall, reduced oily cost, saved cost; Germany production limited company of one Nuremberg machinery built Aogesibao 1984 laser quenchs product line, undertake to large engine cylinder bushing laser quenchs, quench the layout of the belt has alternate reticulation type, corkscrewed yarn type and sine wave type, raise cylinder bushing wearability greatly: Changchun one steam is covered to cylinder of CAl41 car engine undertake laser quenchs processing, overhaul course of development raises 20100000km: Limited company of technology of laser of the hair in Qingdao uses laser network craft to machine the spare parts surface such as engine crock aperture, crankshaft, life raises 3-5 times. 3.

Fu of frit of laser of Fu of 4 laser frit also says laser surrounds Fu or laser frit spread, it is a kind of of technology of material surface modified important method. It is to use high-energy laser bundle (Cm2) of ／ of 104 ～ 106 W is in metallic surface irradiation, through fusing quickly, expand and rapid and caky (cooling rate is S) of 102 ～ 106 OC ／ normally, in Fu of frit of base material surface one has the stuff of special physics, chemistry or mechanical function, make a kind of new composite material thereby, what lack in order to make up for airframe is high-powered. This kind of composite material can produce the advantage of two kinds of material adequately. Make up for mutual the inadequacy between. Technology of laser frit Fu is in agricultural the application in auto industry is wide, the exterior frit Fu that waits for component like annulus of cylinder bushing, crankshaft, piston, commutator, gear. After the Stellite alloy of Fu of frit of sealed and cone-shaped face of engine exhaust valve. Wear-resisting function raises 5 times than basic material. 3.

5 laser alloy changes laser alloy (1aser Surface Alloying, LSA) is a kind of when local modified handles metallic stuff appearance new method. It is to be below the illuminate that high-energy quantity stimulates beam of light.

The alloy element that makes the one layer of base material surface and basis need to join fuses quickly at the same time, mix, the surface that forms ply to be M of μ of 10 ～ L 000 melts layer, make material surface forms the exterior alloy that has requirement deepness and chemical part to change a layer inside very short time. Because have the certain property of prep above base material,this kind of alloy changes a layer.

Can achieve the goal that exterior modified deals so. Be in agricultural auto industry respect, the wear-resisting that laser surface alloy changes craft to be able to improve workpiece appearance apparently, be able to bear or endure corrode, high temperature resistant wait for function. Lengthen what work below all sorts of abominable work requirements is agricultural car component if cage of bearing, bearing, cylinder, lining the service life that wait. 3.

6 laser do not have modular figuration without modular figuration laser is to use when stimulating thin plate of metal of scanning of beam of light.

Intense temperature gradient arises inside action area and cause thermal stress, make board makings realizes plasticity to bend be out of shape. Germany uses laser take shape at agricultural automobile manufacturing industry.

Undertook agricultural the car is enclothed flexible and corrective with other different model figuration, have computer closed-loop control to curving figuration process, precision of angle of bend can achieve ± 0.

20. 3.

7 laser hit mark laser to make bid is to point to use high-energy quantity to wash face of workpiece of illuminate of beam of light. Light energy instantaneous becomes heat energy.

Make workpiece surface arises quickly evaporate. Cut the character of need giving place and figure in workpiece surface thereby. In order to serve as the permanent mark that prevent bogus. 4 epilogue our country is agricultural auto industry technology and foreign photograph are older than returning existence difference. Begin the research of theory of foundation of laser beam machining and crucial technology energetically.

Agricultural to promoting our country auto industry production level and international competition ability, development nation industry has important sense. CNC Milling CNC Machining