Brief introduction of technology of agitate friction welding

Agitate friction welding (FRICTION STIR WELDING) it is a kind of pure mechanization method of continuous solid photograph join, in process of agitate friction welding, the agitate head that form of a column carries special axis shoulder and needle protruding is rotating to insert by solder workpiece, agitate head and was produced by the attrition between solder material attrition is hot, make material thermoplastic change, when agitate tool moves ahead along the interface that wait for solder, thermoplastic the material that turn by the forehead of agitate head to hind move, and effect is created in the mechanical forge of agitate tool fall, realize the solid photograph between workpiece to join. Solder the principle pursues (picture origin: TWI) characteristic of technology of agitate friction welding: 1, agitate friction welding is the implementation below the plasticity condition in material, consistency of metallographic of product welding line is tall, welding line does not have hot crack, without be mingled with, wait for fusion welding blemish without air hole. 2, the mechanical device that agitate friction welding uses automation undertakes soldering, avoided to be opposite jockey person is skilled of degree depend on. Realized whole place to solder automation. 3, agitate friction welding need not do special processing to layer of aluminium alloy oxidation before solder, also do not need crevasse, solder stuff stuff and protective breath do not need in the process, simplified welder foreword. 4, agitate friction welding solders the process won't produce soot, splatter, ultraviolet ray and electromagnetism radiate, came true to solder the environmental protection of the process is changed. 5, the stress of welding line remains of agitate friction welding is low, do not have basically be out of shape, welding line attribute is close to mother capable person, mechanical performance is superior. Raised welding line dependability. Solder solder of a place of strategic importance of attrition of process graph agitate -- use at FSW to solder the solder of a place of strategic importance of attrition of filling solder agitate of end aperture (Friction Plug Welding, FPW) it is England solders institute (The Welding Institute, TWI) the photograph of a solid of the invention solders technology, it is to use what can use up is special model club of a place of strategic importance the method that agitate friction welding end aperture or blemish have elimination, club of a place of strategic importance falls in constant pressure or tensile action, drive club of a place of strategic importance to rotate through actuating device, with aperture of a place of strategic importance (the aperture that wait for solder) the interface undertakes attrition, form model to melt a metal, protect approach period of time, can finish solder, can have big depth through this technology narrow clearance solders. Club of a place of strategic importance cost of material low, environmental protection, solder of this kind of method fast fast, normally, the aperture with fill deep 100mm wants 20s only, and still can undertake soldering in harsh environment. My company is aimed at market demand, established project group technically to already had successful research and development and test to this technology. Already applied at blemish rehabilitate, FSW to solder at present the domain such as end aperture purify. CNC Milling