In aviation manufacturing industry " fresh troops " -- agitate friction welding

Agitate friction welding is technology of join of photograph of a kind of solid, contact performance is superior; 2.

Groove does not need before solder, man-hour prepares before OK and economic solder; 3.

Solder do not need to protect energy of life in the process, also do not need fill data; 4.

Solder the process implements automation easily, can realize whole place to solder (if pursue 2) , contact quality consistency is good; 5.

Solder hot input, bring about thereby solder be out of shape level of stress of remains of small, connect is low, it is a kind of low stress, small be out of shape solder technology; 6.

Solder do not have in the process splatter, without arc, without radiation, it is a kind of green solders technology; 7.

Solder efficiency tall, specific power consumption is low, be a kind efficient solder technology. According to above characteristic, agitate friction welding solders in the light qualitative alloy such as aluminium alloy, magnesium alloy the respect has his distinct advantage, also can wait for the difficult solder material of high melting point with alloy of Yu Gang, titanium, there is wide applied perspective in aerospace manufacturing industry. Technology of foreign agitate friction welding 1.

Box of spaceflight fuel lay aside solders Boeing company used agitate friction welding to receive repair 1997 a case of lay aside of Delta rocket fuel that has fusion welding weld defects, the Delta rocket that receives repair at will containing agitate friction welding 1999 blasts off successfully. Through with former technology (change polarity plasma arc solder) photograph comparing, agitate friction welding can achieve following results: (1) lower defect occurence rate, up to made in all 2005 about 8100m is flawless welding line; (2) contact intensity raises 20% above; (3) weld time is spare 71% ; (4) amount of labor is managing 81% ; (5) production cost is managing 60% at present, boeing company already was aimed at Delta II and Delta IV rocket to build two agitate friction welding to receive product line respectively. Losk Heed.

Martin company uses technology of agitate friction welding at box of the lay aside outside space shuttle make; Fokker Space company used technology of agitate friction welding to solder motor of Ariane 5 rocket advocate bear force casing; 3 water chestnut weigh labour to use technology of agitate friction welding at soldering H-IIA (B) rocket. Current, agitate friction welding already became these enterprises to make lay aside case kind of the structure basically solder technology. Nextpage2.

Aviation type construction solders 1998, boeing company begins to undertake to the battleplan spare parts of agitate friction welding groovy and mechanical function and fatigue function study, undertook flight experiment test and verify. Current, the foundation applies successfully to go up in carrier rocket, boeing company studies to the agitate attrition technology of plane structure and experiment to had entered the phase of project application development of systematization, devote oneself to low cost, small lot at the same time, shape beforehand and machine the production of agitate friction welding that increases workpiece, will replace high cost, large sheet the spare parts is made. 2004, in air force " can pay sexual chef of metallic stuff the project " (MAI) aid financially below, in the light of the aluminium alloy of transport of C-17 large-scale for military use motherboard holding thing undertook application development of agitate friction welding studies. The basic structure of motherboard holding thing is sandwich structure. Tried 5 kinds of production scheme to company of this structure Boeing, include agitate friction welding technology, GMAW technology and all sorts of mechanical join methods. Have technology of agitate friction welding only among them, satisfied the function requirement of the product not only, also satisfied air force to ask to the cost of this project. This " Slipper " the structure solders together by profile of extruding of 7 6005A aluminium alloy, by fluctuation two agitate are chafed between every two profile solder connect joins and become. Connect of profile agitate friction welding squashs to undertake all sorts of corrosion resistance can experiment to 6005A aluminium alloy after solder make clear: (1) flake according to what ASTM standard undertakes 48h corrode an experiment, did not corrode a trace apparently; Pass 96h flake after corroding, arose a few corrode stain. (2) make the experiment is corroded between 24h brilliant according to ASTM standard, contact surface appeared a few corroding trace. (3) immerse through neuter salt mist, in contact surface 0.

Discovered inside 076mm limits corrode a trace. (4) according to ASTM standard, immerse in acidity salt mist two weeks, result and experiment 3 likeness. American Eclipse company used technology of agitate friction welding to replace the rivet of on plane of N500 business affairs 70% above to join, add other new technology (if laser Jiao Zhi is assembled) apply, add up to economic cost makes an appointment with 2/3. Use technology of agitate friction welding, can compare automatic riveting 6 times faster, move riveting than the hand 60 times faster, predict to be able to achieve what produce 4 everyday to approve productivity 2008. Airbus company already used technology of agitate friction welding at the production of envelope of airframe of plane of A340-500s, 600s and A350-800s, 900s, join through using technology of agitate friction welding to replace rivet, every Mikeshi is decreased now heavy 0.

9kg. In addition, the technology of agitate friction welding that airbus France company and British company divide into equal parts did not develop box of the ala central and plane wing studies. Consider to make clear, of the structure of 7000 series aluminium alloy that technology of agitate friction welding can achieve fusion welding to solder hard solder, and the craft repeatability with be had quite good and bigger craft abundant are spent. 3.

Aerospace solders the new application domain that technical aerospace solders is technology of agitate friction welding. American aerospace management board (NASA) developing high rotate speed (highest can amount to 50000rpm) technology of agitate friction welding, this one new technology predicts to be able to make equipment bulk, weight and the v force of the need when soldering reduce greatly, can offer unit of a kind of portable agitate friction welding thereby, so that realize pair of space shuttle, spacecraft and dimensional station at be in aerospace,wait for a structure solder repair. At present this technology still is in the primary level of research, still announce without concrete applied positive result. Technology of agitate friction welding 2002, china of make one's bow of technology of agitate friction welding, develop very quickly in academic research, product get rapid development with the respect such as project application. 1.

The agitate friction welding of weapon of small-sized arms outfit is received 2003, joint development of some mill of center of Chinese agitate friction welding and home the cylindrical shell of small-sized Bao Bi that agitate friction welding receives, material of this cylindrical shell is LY12-CZ aluminium alloy, by 3 different spare parts comprises: The different system that carry drill, right body that carry drill and the straight cylindrical shell intermediate. Whole cylindrical shell is joined by two welding line and become, solder contact receives a form to build, welding line form is seamed for annulus, welding line diameter is 90mm, build receive ply to be 3mm. Check after solder of this spare parts, can bear 3 above atmosphere, welding line place is not flat; Welding line exterior consistent, welding line shapes good, beautiful; Every can produce 150 parts. It is before development agitate friction welding, this construction part once used communication solder of arc of tungsten pole argon (TIG) undertake cylindrical shell of Bao Bizhu form solder, but Bao Bi of LY12 aluminium alloy takes the look that receive a canister after soldering, often appear crackle and stoma, should solder product percent defective is achieved even 70% , very inaccessible product approves manufacturing demand. Technology of agitate friction welding solved this effectively a series of difficult problem, contact intensity coefficient can be achieved 90% , n achieves 90% above. 2.

Missile cabin paragraph agitate friction welding is received stem from decrease the consideration that waits for a respect again, missile cabin paragraph draft by original antirust aluminium (like 5A06 aluminium alloy) aluminium alloy of instead excel in (like LY12) , but it is very difficult that these materials use fusion welding method implementation solders, the cost that whole shapes very tall, because this is pressing,need resembles agitate friction welding such solid photograph solders technology. 2004 ～ 2005, center of Chinese agitate friction welding and some base collaboration began the research of this respect, be opposite respectively with integral cabin paragraph make concerned N-joining join, annulus seam join to wait had application development, trial-produce the product of many model is successful test-fly. Current, the batch that technology of agitate friction welding already prepared to be used at relevant product turns production. 3.

The agitate friction welding of box of rocket fuel lay aside is received in view of Boeing company, Losk Heed.

Equestrian fourth company already all used technology of agitate friction welding at rocket fuel lay aside what case of fuel lay aside registers outside box and space shuttle solder, it is easy that technology of agitate friction welding is compared in domestic promotion. 2002 ～ 2005, in the country many tasks study the support of the project falls, the some spaceflight manufactory of center of Chinese agitate friction welding and home was aimed at box of lay aside of fuel of diametical 2250mm and diametical 3350mm rocket to begin collaboration, developed relevant imitate structural member, passed compression test test. Carry basic research, center of Chinese agitate friction welding developed much stage to be used at box of rocket lay aside (cylindrical shell structure and structure of one's store of valuables) equipment of soldering agitate friction welding, devoted already use. Agitate friction welding is a kind very outstanding solder technology, to solving aluminium alloy (especially 2000 series and 7000 series aluminium alloy) wait for light qualitative alloy solder difficult problem has important sense. The product that the main industrial developed country on international already used this technology extensively at the domain such as aviation, spaceflight is made in, although domestic getaway compares evening, but development rate is very rapid, the fire of star already became the force of set the prairie ablaze. CNC Milling CNC Machining