Summary: ? Housing basketry inspects of Di of filling ぷ of enough of of of ⒘ of canister of Mei Di Luan to light ㄉ of crab of Yun of forge Lv neon to write road of angry of N of lofty of awl of Gu of put down of τ straightforward advice to treat Juan Shun to show of Di of filling ぷ of Tao to light forge Chinese catalpa to sunlight slash , 6 legs machine tool, fictitious axis machine tool or new-style and nimble production machining center) it is the fresh blood with familial machine tool, it abandoned to secure slideway cutting tool traditionally oriented means, used 6 freedom to spend shunt-wound orgnaization (Stewart platform) for its construction principal part, consequently theoretic can machine spare parts of aleatoric and complex curved surface (wait for) like impeller, mould. Additional, this kind of new-style machine tool each athletic effect coupling of adjustable lever, have the potential advantage with tall precision. Machine tool precision examines to include geometrical precision, position precision and working precision to examine normally. Current, have not see ISO is organized or some country is aimed at precision of machine tool of fictitious axis numerical control to examine the standard of formulate. The article consults the content that precision of machine tool of conventional numerical control examines, combine the characteristic of machine tool of fictitious axis numerical control, drafted proposal of proved recipe of check of its job precision. Of precision of job of machine tool of 1 conventional numerical control examine to work around machine tool of conventional numerical control of precision examine, standard of world of boat of American NAS979(country) formulate " circle, lozenge, quadrate " experiment of test specimen cutting (abbreviation tries cut a way) standard, our country also has similar level. Express the 1 method that tries the logarithm that cut a way to accuse all-purpose tool milling machine to undertake precision examines to use. From the watch 1 knowable, try Qiefatong to cross 4 kinds of means to examine respectively the linearity of coordinate of X of machine tool edge: X, coordinate of Y, Z mutual the verticality between: The project such as the positional precision of the aperture on the linearity of numerical control interpolation, circularity and X-Y plane. Additional, this law basis numerical control machine tool the journey limits of each coordinate, determine the corresponding size of cutting test specimen. Because traditional machine tool is linear map between the error of each coordinate and journey,such regulations are, use small size test specimen to examine consequently the working precision of great distance has rationality. Use try cut a law to detect precision of machine tool job, examine to test specimen precision experimental condition demand is high, experimental cycle is longer, and because most cutting moves,edge X-Y plane undertakes, did not evaluate the precision of plane of X-Z, Y-Z, reason cannot evaluate all performance of machine tool of conventional numerical control. Newest international machine tool examines the standard recommends inspection of appearance of the lever that use a ball to replace NAS 979 to try cut a way, to the machine tool working precision undertakes rapid and effective detect. The attempt of model of orgnaization of formulate machine tool of case of proved recipe of check of precision of job of machine tool of numerical control of 2 fictitious axes is fictitious the distinction of machine tool of axial numerical control and machine tool of conventional numerical control is versed in in Yujijia the error is error of each adjustable lever length and hinge center position error, accordingly, need drafts proposal of proper proved recipe of working precision check. Although be in,precision of job of machine tool of conventional numerical control examines in, ball lever appearance detects the law is replaced morely try cut a way, but because follow the error that ball lever appearance offers to diagnose software to cannot be used at machine tool of fictitious axis numerical control directly at present,working precision examines, try the first selection method that cuts a law to become here consequently. If plan institute is shown,the theory that makes plan accuses the orgnaization model of the machine tool according to fictitious number of axle, its error expression is Oo1-li · of · of Li=li · Ai-li (RBi)-li · (the Li in RBi) type grows vector for each lever of adjustable lever, its corresponding error is Li;li=Li/Li: Ai nods absolutely error for static platform hinge: Oo1 is move, department of sit quietly mark is apart from an error between origin: R is moved for aleatoric hour, matrix of commutation of the attitude between department of sit quietly mark, should use platform when attitude is changeless, ) of R=E(unit matrix, r is the error of R correspondence: Bi is to move platform hinge to nod opposite coordinate, bi is its corresponding error. From go up type is knowable, because fictitious number of axle accuses error of pose of machine tool cutting tool and error of adjustable lever length,exist nonlinear map concerns, the precision of small size test specimen cannot the working precision of space of work of accurate report large size, the test specimen that needs choice and dimension of limits of space of machine tool work to comparative consequently undertakes cutting, in order to evaluate its job precision. Of precision of job of machine tool of fictitious axis numerical control examine precision of calm attitude job examines when machine tool of fictitious axis numerical control does calm attitude to move, in describing the variable that changes platform pose, only 3 positions variable follows change of cutting tool contrail, and stance part is changeless from beginning to end. Watch 2 it is for machine tool of fictitious axis numerical control when 300mm of × of working space Ø300mm case of proved recipe of check of precision of calm attitude job. Change attitude job precision examines machine tool of fictitious axis numerical control is done change when attitude moves, move platform stance part to change continuously along with cutting tool contrail. This makes the photograph when limits of space of machine tool work decides attitude together compares big about-face, and stance part changes jump over big, the machine tool can amount to working space smaller. Subsequently and is the problem that come: ? of ń of Meng Yun crab thanks of Di of ぷ of of neck wetting eulogy to light forge Qi to protect coil up firm reel silk from cocoons of some Ji of of ぜ of discharge of model ㄊ Yun makes an appointment with B/T 17421 of the Zhu austral N of lofty of brother's son of sunken Hu dainty. 2-2000 " does the machine tool examine general rule -- : of the 2nd part? of tan1huan4 of ㄎ of be favored with of Piao Cuo group magpie of of tan1huan4 of ㄎ of Tuo thoroughfaring cook a meal is graceful ┝ of deficient of sandpiper of Tuo of model ā slander this ┗ sweets wine the negotiation that examines with respect to precision of machine tool of conventional numerical control between? manufactory and user wants a place. Author proposal, according to its principle, talk things over by relevant parties draft change machine tool of axial numerical control changes attitude job precision examines clause, the partial content that as this kind of machine tool working precision examines. Precision of job of 3 last words is the main index that measures machine tool performance. Although pass experiment of test specimen cutting to examine,precision of job of numerical control machine tool already had strict level, but apply to what precision of job of machine tool of fictitious axis numerical control examines to try cut a law to still be in exploration phase. The article analysed precision of job of machine tool of conventional numerical control to examine standard, accuse machine tool and its substaintial distinction according to fictitious number of axle, drafted machine tool of numerical control of new-style and fictitious axis to decide case of proved recipe of check of attitude job precision, and to changing attitude job precision examines offerred a proposal, offer relevant researcher reference. CNC Milling
CNC Machining