How to raise line cut to machine the precision of workpiece and exterior quality

Treatment parameter is in this phase, should adopt reduce width of pulse of high frequency power source, increase pulse space, reduce the way that exports voltaic indication, the bosseyed scintilla that makes electrode silk place suffers stimulates faze force to reduce, also reduced scintilla discharge to ask at the same time unoccupied place, make dog cut has when electric current adjusts traversal speed and machine tool empty traversal speed to be close to. Should be in small electric current, narrow arteries and veins undertakes below premise of pulse of wide, small energy. Silk of the molybdenum when walking along silk quickly is a kind of random vibration, molybdenum silk is when the idling, amplitude is in about 0.

03ram left and right sides, for the escape vibration influence to workpiece surface, when cut sunken model, first time cut leaves the surplus that has minimum, next with big arteries and veins wide, big electric current is fast feed, high speed is efficient the external form that processes work, certain from workpiece interval retreats molybdenum silk when the 2nd cut, discharge namely clearance is increased, reason does not have electric spark 2 times when cut, be, second low erode discharge process. 2.

Fragile when first time cut machines an end, a large number of works that its cut processes had been finished, next for many times cut treatment, essence undertakes in the light of precision of ascensive treatment workpiece and exterior quality. Need before adopting cut cut 2 times so adjust position of canister of lay aside silk, change guide pulley and guide pulley bearing. Because one, the position with located silk of electrode of 2 cut treatment is not identical, when the 2nd cut, cut when seaming width to exceed first time cut greatly cut seam width, cut the vibration that seams two side to cannot restrict molybdenum silk. One of hub titles that because move back and forth takes a machine tool of cut of electric spark line,affect cut precision are title of electrode silk vibration. The trends that the reason of electrode silk vibration basically has canister of lay aside silk is lopsided, radial the trends of bearing of bearing of canister of silk of jumpy, lay aside, guide pulley, guide pulley is jumpy and the tension of electrode silk. In machining a process additionally, electrode silk moves in high speed (its motion speed is high temperature of the generation in 300 ～ 700m/min) and cut (10000 ℃ are controlled) action, together with ageing makes electrode silk loss, diameter is reduced, cause tension to drop, amplitude increases, the vibration in bringing about treatment thereby increases, the influence machines the effect. When close silk, must exert oneself to do sth. alertly proper, fall in the condition that ensures electrode silk is ceaseless as far as possible taut electrode silk in order to assure the tension of electrode silk (should control) in 15N commonly, make electrode silk is in in the oscillatory control in cut process 0, in 03mm. Because this can adopt the method of close silk twice,will progress afore-mentioned index. Close of vibration of silk of the electrode when right now the vibration of electrode silk and sky carry, utmost ground reduces electrode silk vibration, increase pulling force crucial. Among them cut is double-faced face call surplus treatment, right now electrode silk is to be in relatively undertake cut is machined in the environment of block, oscillatory to electrode silk damp effect is bigger, be helpful for electrode silk at the same time cutting the not random; in seaming and the 2nd cut is unilateral surplus treatment, difference mistake weighs the discharge power that increases man-hour action to go up in electrode silk, electrode silk the damp position of two side is different also, cut the tie that seams pair of electrode silk amplitude full smooth effect is nonexistent also. 3.

The analysis that the work out by of the program machines a method to 2 cut and experiment repeatedly, the consideration is detailed when 2 cut, the machine tool locates precision reachs the element such as cut discharge clearance 2 times afresh, when the 2 cut program that writes cut sunken standard, ≈ of F extraction △ 0.

05mm is advisable, among them △ F=f2-f1, compensation of clearance of cut of F1- first time, f2- compensation of clearance of the 2nd cut. Experimental result makes clear, when △ F is too big, proportional go at machine tool sky, did not undertake scintilla discharge machines; to spend a hour when △ F namely, proportional at the machine tool bilateral and symmetrical surplus is machined, cannot achieve the goal that cut machines 2 times likewise. Current, the move back and forth that has cut technology for many times walks along machine tool of silk thread cut to move toward the market in succession. When even treatment speed is 50mm2/min, can not obtain Ra ≤ in disorder through many second cut 1.

The exterior thick clumsy of 0 micron is spent, 10 micron of precision ≤ . The result of the integrated application that move back and forth walks along machine tool of silk thread cut to implement cut for many times is technology of accurate drive and control technology, pulse power source, numerical control technology, also be the important step of precision of ascensive cut treatment and exterior quality. If tentatively,move back and forth of series of Su Sanguang HA takes machine tool of silk thread cut, use SKD2 to control system of automatic process designing of system and EAPT, numerical control system contains expert database, can be what the user raises sacrificial vessel put oneself in another's position to machine craft parameter for many times. Machine tool noumenon uses workbench of coordinate of X of drive of entrance communication servo, Y, use pitch to compensate a function at the same time, fixed position precision is tall, can stabilize treatment, treatment for long the surface does not have stripe glossily, especially big norms machine tool machines model the precision of aperture and jump pace precision all is compared before cut machine tool has electric spark line to rise significantly, , overall function stepped solid one pace ahead. CNC Milling CNC Machining