Thick aluminium board the development of machine of the makings below high speed and application

Keywords: 　 of Blanking Machine of 　 of Circular Saw of 　 of Thick Al Plate is thick the makings below aluminium board is the difficult problem of one old technique that puzzles industry of our country aviation all the time. Well-known, aluminium alloy plank, especially thick aluminium board the application on plane structure more and more for extensive, the new structure such as integral casing, bridge is in our country already was used in great quantities in the development of each model plane. But industry of domestic most aviation to thick aluminium board next makings basically use common method, plunge limit of the dig that discharge aperture namely, milling or use the material below advanced large CNC Milling, its technology economic benefits is inferior. To solve thick aluminium board the difficult problem of next makings, my company developed successfully large thick aluminium board machine of the makings below high speed. The article makes one introduction with respect to the main technique parameter of this machine tool, total construction and cutting tool, undertake technical economy is analysed. 1 machine tool is main this machine tool basically uses technical standards at the entrance to mix homebred and large thick aluminium board next makings treatment. 1.

1 makings norms and material name are the biggest length: 3 660 Mm; The biggest width: 2 000 Mm; The biggest ply: 100 Mm. Material brand sees a table 1. Express product of 1 material brand to exceed LC9LY9 of aluminous China of aluminous forge of duralumin duralumin forge, LY12LD14LD2 United States 70752024201460611.

2 machine tools are main technical standards and mesa of treatment means job: × of 4 800 Mm 1 300 Mm; Curium a diameter: 610 ～ 660 Mm; Main shaft rotate speed: 144 ～ 1 440 R/min, stepless frequency control; Feed speed: 58 ～ 8 500 Mm/min, stepless frequency control; Electric machinery stage counts: 3 (main shaft, feed each 1, lubricant electric machinery a) ; General power: 18 KW; Cover an area of: × of 6 400 Mm 1 600 Mm. Treatment means sees a picture 1. Graph Fig of 1 treatment sketch map.

The total construction of total construction and working principle machine tool is like machine tool of 1 　 Machining Scheme2 the graph is shown 2 times. Graph 2 machine tools are overall structural Fig.

2 　 Structure Of High Speed Blanking Machine For Thick Al Plate1.

Working platform; 2.

Float orgnaization; 3.

Crossbeam; 4.

Air cylinder; 5.

I-steel slideway; 6.

Set tine fretsaw; 7.

Procrastinate board; 8.

Lathe bed; 9.

Pedestal; 10.

Reducer. Main shaft (curium piece) choose common communication electric machinery, adopt drive of a pair of leather belt annulus. Main shaft component is installed at lug board on, procrastinate board by drive of another communication electric machinery, classics reducer, drive one guide screw, nut orgnaization makes feed move. To get used to the requirement of different cutting craft, both speed all can be adjusted by respective transducer, realize infinitely variable speeds. Device of movable type clamp can is opposite thick aluminium board execute many bits of even clamp, and clamping force is adjustable. Center lubricant device and hand to use lubricant pump, to lathe bed slideway, guide screw, the place such as nut, bearing undertakes lubricating, when fretsaw is machined, to curiuming area undertakes a cutting by sparge condenser sparge refrigeration lubricates, lathe bed slideway uses steeliness telescopic shield defends, mobile cable defends with rectangular metal collapsible tube, cut bits to be collected effectively, configured along with procrastinate board the funnel accumulating bits that moves together. Clamp device by solder crossbeam makes fundamental component part, 20 didymous platoons are installed to become 10 air cylinder inside. Two end all have crossbeam one float orgnaization, when hand push beam, crossbeam relies on this orgnaization to move on the I-steel slideway on workbench, after shift reachs the designated position () of the fixed position that block iron, clamp of air cylinder movement is thick aluminium board, right now ability can make expect below sawing. When workpiece condole, discharge, but hand push beam comes outside workbench face. Working platform is large solder type frame structure, this mesa is the bearing face that expects below workpiece, also be the oriented foundation with clamp mobile unit. Leave on mesa have strip form undercut. After the perch at the beginning of workpiece hoisting, by 4 attune whole orgnaization is undertaken fine tuning is opposite knife, this orgnaization can break up to mesa, in order to facilitate workpiece assembles and unassemble. Splatter to prevent to add man-hour to cut bits, in mesa installed between 6 pedestal can go to the lavatory disassembled sliding door. Procrastinate board mobile on the double rectangular slideway of lathe bed, procrastinate board mobile deputy inside stick have FQ-1 answer model board, use additionally inclined set adjust its clearance. Guide screw drive procrastinates board the nut that go up makes procrastinate board make feed motion. Because guide screw is very long, cause sag of chain to because its are self-prossessed,decrease too big, in guide screw both ends proper place installed the auxiliary bearing of oriented gyro wheel, because this is installed at procrastinating board the nut that go up can half nut just can be in make it auxiliary bearing has been crossed when shift. Two upright bearing install guide screw the form of a move about of a fixed, axial. This machine tool uses control of afterwards report contactor, by control station of ark, operation and frequency control system are comprised. Because the machine tool belongs to large facility, reason operates a station in the setting other lathe bed, so that control ark is reached in lathe bed,two ground all can operate. Motion of main shaft cutting and feed motion all use safeguard of multiple electric equipment, center lubricant system automatically to be able to be opposite many lubricant dot is carried out lubricate automatically. Be those who obtain different type, norms is thick the optimal cutting effect of aluminium board, motion of main shaft cutting and feed motion all can pass respective transducer to implement stepless speed regulation conveniently. 3 cutting tool is thick aluminium board is machined with the makings below fretsaw cutting, because discharge bits,appear constantly not free and stick a knife, place the phenomenon such as the knife because of fretsaw end panel beats and be being caused. When high speed cutting, this one phenomenon is more serious. We ever chose fretsaw of some factory standard to make try cut treatment, its are main parameter is as follows. Cutting tool: 610 Mm of diametical D ＝ , matrix width B=6 Mm, tine counts) of Z=80(thick tine, set a fretsaw, cutter hub YG8, matrix end panel is the biggest jumpy 0.

8 Mm; Material: The United States 7075, ply δ =38 Mm; Condition: N=700 R/min(v=1 342 M/min) of main shaft rotate speed; Feed speed: Vs=140 Mm/min. Try below the condition that lubricates without refrigeration in point cut discovery for many times, every treatment is less than 1 Min, need to retreat Dao Qing to manage groovy aluminous bits is stuck on the chamfer that hold bit, accordingly when the chamfer holding bit of major tooth already by aluminous bits conglutinate and workpiece clips fretsaw piece matrix phenomenon is serious, feed force increases apparently, cause feed system to call the police even sometimes jockey, reason curiums a loss is severe. Convert after suit aluminium alloy thick board the special fretsaw of high speed cutting piece undertake machining, its are main parameter is as follows. Diametical D=660 Mm, , b=6 of knife head width.

5 Mm, chamfer of thick tine of Z ＝ 40(, empty bits increases) , hard alloy of cutter hub YG8, end panel is the biggest jumpy 0.

8 Mm. Radial and jumpy ± 0.

5 Mm, knife head width is more than matrix width 0.

5 Mm. Its are the biggest the characteristic is two office leave bit matrix have side edge, material of this side edge still is YG8, fretsaw of resect of the side edge when be being machined piece the hits because of end panel beats and connecting with workpiece area when high speed rotates, solved fretsaw thoroughly piece matrix is placed phenomenon. Mix through different to be the same as a brand ply differ with ply the thick aluminium of the brand board cutting experiments (2) seeing a table makes clear: Choose those who take side edge to set tine fretsaw piece (treatment of YG8) of thick tine cutter hub is thick aluminium board effect is very ideal, not only cutting dosage has bigger rise, and the durability of bit also is improved somewhat. Express 2 thick aluminium board cutting test data is cut Vs/mm of speed of feed of material cutting speed.

N/r of effect of Min-1 lubricant condition.

Min - 1v/m.

Min - =50 Mm1 2002 300524 of 17075 ply δ .

It is good that 5 cuttings area adds quality of sparge refrigeration, lubricant cut, without the phenomenon that place a knife, bit temperature rise stabilizes economy of technology of =100 Mm1 2602 5001604 of 7075 ply δ to analyse 　 thick aluminium board the development application of machine of the makings below high speed solved me the aluminium of less than of ply of company 100 Mm board next makings difficult problem. Grow the 3 600 Mm, 7075 aluminium that cut thick 50 Mm in order to cut now board for exemple, undertake to issueing the material below makings and other way with this machine tool technical economy is analysed, see a table 3. The watch expects below 3 high speed machine and other the contrast of technical economic benefits of next stuff kind machines methodological cutting tool and cutting dosage man-hour / Min efficiency */ times bad news expects / times outfit of managing rate */ places Kg means is common treatment method: Rocker drills the hole that get a platoon; Dig of double housing planer cuts broach of the 20 Mm that decorate a border: Bore 180; Decorate a border: Unilateral surplus 5 Mm, bilateral in all 10 Mm360120117.

011 hold clip for many times marvellous milling cutter of 30 Mm of treatment of planer-type milling machine, cent is machined 2 times 60814.

581.

17 outfit clip is thick 660 Mm of  of machine of the makings below aluminium board high speed curiums piece (knife head is wide 6.

5 Mm, unilateral is jumpy 0.

8 Mm, main shaft: 700 R/min, feed: 150 Mm/min24203.

944.

* of 32 outfit clip is with common treatment method 1 undertake comparative. See by the watch, with common treatment methodological photograph is compared, use work efficiency of the makings below this method to be able to raise 20 times, managing rate is material 4.

32 times, and cut is smooth level off, exterior surface roughness can amount to Ra 6.

M(of 3 μ can regard first working procedure of finish machining as) . In addition, the aluminium that is contented and different name, norms board next makings, obtain first-rate cutting dosage, rotate speed of machine tool main shaft and feed speed can adopt stepless speed regulation, this brought huge to go to the lavatory to effective treatment. CNC Milling