Laser assists agitate friction welding (LAFSW) be a kind new improvement agitate friction welding, agitate friction welding is the technology that develops nearly 10 years. In agitate friction welding, solder heat energy is to come from between tool and workpiece attrition quantity of heat. Because this kind of craft needs relatively great power, accordingly, the device that uses in agitate friction welding is heavy and costly. Laser assists agitate friction welding to heat with laser the sources of energy workpiece, and the main effect of agitate head is agitate and join workpiece two parts. As a result of this kind of reason, laser assists agitate friction welding is a kind mix relatively simply cheap means. The case that this article discussed alloy of AZ91DMg of use LAFSW join and the actor weakness that use this craft presence. 1 laser assists agitate friction welding to overcome the inadequacy that exists in agitate friction welding, be like (1) outfit clip solders the clamping apparatus of workpiece is bigger, forward and mobile welder provides the power with very great need, welder has wear rate relatively tall; (2) heat with induction coil method unwarrantable proper place, solder agitate head and clamping apparatus device are heated the influence of induction coil and make agency heat with induction coil reach apply to conductor material only, can not use at other metalloid with blame conductor material. The laser that people developed assists agitate friction welding. This kind of method mixes by general milling machine Nd: YAG laser is transformed. Laser the sources of energy is rotating before agitate head workpiece of the warm-up inside narrow range. Such, the workpiece bulk before gyral agitate head, plasticity increases (illustration 1) . Next, use the methodological join work like common FSW craft. Rotate the high temperature bate before the tool workpiece, and need not use clip of outfit of powerful clamping apparatus can assure join. Forward shift solders the tool needs very little power only, decreased to wear away so. To laser the sources of energy the advantage of this kind of craft still has solder capability is higher, in soldering, won't cause wear away too much. Business laser, have accurately laser diameter control equipment, accordingly, the be heated area that controls workpiece and laser source reach the amount of workpiece, and hold the be affected by the heat of other position of the system be easier. Graph 1 laser assists principle of agitate friction welding of 2 experiments build soldering 700-W is used in the experiment, have 1064 Nm wavelengh, much mode Nd: YAG laser system and general 3-hp roll are worn establish milling machine. Test specimen outfit is placed in establish milling machine platform to go up, pin of 4 Ф 23 Mm, what a material is straight handle of 20 Mm of high-speed steel Ф is cylindrical the tool is built-in long 4 Mm, head of agitate of Ф 9 Mm. The optical fiber that grows through 5m of core of M of 800 μ stimulate beam of light to deliver welder to make a stand directly. In front of agitate head beam of light comes loose anxious form spot of Ф 1 Cm (see a picture) . Solder with thermocouple the working temperature that the surface of similar test specimen will come to be appointed beforehand, 200W power laser can heat test specimen to 320 ℃ left and right sides, rotate speed of the axis coming back is spent for 1700rpm. 3 conclusion and discuss the sectional MgAZ91 with two thick 4 Mm alloy board is pressed in front parameter join of the description, see a picture 2. Because this research is the job of primary level merely, still need to be in workpiece machinery function and the laser that optimal combination discovers in combining the productivity of craft and FSW parameter. Laser can be used at heating to be not martensite material, resemble plasticity material and pottery and porcelain. LAFSW solder joins the type of these material returns will further research. The welder that 4 conclusion laser assists agitate friction welding art had been proved. The use mark that surges workpiece of light energy warm-up wears what be provided in welder and need to provide greater power in workpiece to reduce, the method that improves with this kind simplified to use, solder because of what this uses economy the method already became a possibility. Additional, taller solder speed achieved better beneficial result in improve. CNC MillingCNC Machining