Skill of Fanuc lathe process designing

Install lathe of numerical control of BIEJING-FANUCPowerMateO of 　 of reference point 　 to share 2 axes neatly, namely main shaft Z and X of cutting tool axis. Good stuff center fastens origin for coordinate, when each knife is close to good stuff, coordinate value is reduced, those who say for feed; Conversely, coordinate value increases, call retreat a knife. When cutting tool of fall back on in the begining when the position, cutting tool stops, this position calls reference point. Reference point is a very main idea in process designing, every carry out automatic loop, cutting tool must return this position, preparation circulates the next time. Accordingly, before executive program, the real position that must adjust cutting tool and main shaft and coordinate numerical value keep consistent. However, the real position of reference point is not changeless, the sort of the cutting tool that process designing personnel can use according to the diameter of the spare parts, place, amount adjusts the position of reference point, shorten the idle stroke of cutting tool. Improve efficiency thereby. 2.

Change 0 it is to work a way in low-pressure electric equipment, the short bearing pin with many existence kind spare parts, its grow diameter comparing to be 2~3 about, the diameter is more under 3mm. Because dimension of spare parts geometry is lesser, common appearance lathe holds clip hard, cannot assure quality. If press process designing of method of as usual compasses, machine a spare parts only in every time loop, because axial dimension is shorter, cause slide block of machine tool main shaft to be in lathe bed slideway is local and frequent move back and forth, movement of orgnaization of pinchcock head clamp is frequent. After working for long, can cause machine tool slideway local and excessive wear away, affect the treatment precision of the machine tool, serious can cause a machine tool to discard as useless even. And the frequent movement of orgnaization of pinchcock head clamp, can cause the damage that controls electrical appliance. Want to solve above problem, the action that must increase main shaft to send into length and orgnaization of pinchcock head clamp is removed, cannot reduce productivity at the same time. It is OK to be imagined from this in machining a loop treatment counts a part, criterion main shaft sends into length to be sheet of spare parts length multiple, can amount to main shaft even the largest moving space, and the behavioral time-interval of orgnaization of pinchcock head clamp is lengthened accordingly for original multiple. More important is, odd before the auxiliary time apportion of a spare parts is counting a spare parts to go up, the auxiliary time of every spare parts shortens greatly, improved manufacturing efficiency thereby. To implement this one tentative plan, I associate to the concept of the main program in computer programming and subprogram, if will involve the command field of dimension of spare parts geometry to be put in a subprogram, and in commanding pilot of concerned machine tool to field and the command field that cut off a spare parts are put in the main program, when every machine a spare parts, through calling a subprogram by the main program the command calls a subprogram, after treatment is finished, jump turn a main program. Need machines a few spare partses to call a subprogram a few times, very the amount that is helpful for increase and decrease machining a spare parts circularly every time. The machine program that weaves through this kind of means also compares concise palpability, facilitate revise, safeguard. Notable is, because each parameter of the subprogram keeps changeless in be called every time, and the coordinate hour of main shaft is changing, to suit with main program photograph, statement of opposite process designing must be used in the subprogram. 3.

Reduce cutting tool idle stroke 　 is in lathe of BIEJING-FANUCPowerMateO numerical control, the motion of cutting tool is driven according to * pace into electromotor, although there is sudden drop fixed position to command G00 in order order, but compare with the feed means photograph of common lathe, still appear efficiency is not tall. Accordingly, want to improve machine tool efficiency, must improve the moving efficiency of cutting tool. The idle stroke of cutting tool is to show cutting tool is close to the distance that reference point of the go back after workpiece and cutting end runs. Want to reduce cutting tool idle stroke only, with respect to the moving efficiency that can improve cutting tool. (the numerical control lathe to nodding position control, ask fixed position precision is taller only, fixed position process but as far as possible fast, and cutting tool is opposite the athletic line of workpiece nots matter. ) the respect is adjusted in the machine tool, should be in the initiative position arrangement of cutting tool as far as possible the place that * close club expects. In program respect, want the structure according to the spare parts, when making exhaust may little cutting tool machines a spare parts to make cutting tool is being installed, each other disperse as far as possible, when be close to good stuff very much each other won't produce interference; On the other hand, as a result of the initiative position with real cutting tool already with produced change so, must undertake modification to the reference point position of cutting tool in the program, make with actual condition conform to, cooperate to choose fixed position order quickly again meanwhile, can control the idle stroke of cutting tool raise a machine tool to machine efficiency thereby inside the least scope. 4.

Optimize parameter, balance cutting tool bear, reduce cutting tool to wear away 　 because of spare parts structure Protean, what cause load of cutting tool cutting likely is lopsided. And because the difference of oneself geometry appearance brings about different cutting tool,exist in respect of stiffness, intensity bigger difference, for example: outside round knife and cut off a knife between, outside between round knife and knife of the circle outside turning over. If these difference are taken no account of when process designing. With intensity, stiffness weak cutting tool bears bigger cutting load, the blame that can bring about cutting tool wears away to damage even normally, and the requirement of treatment quality short of of the spare parts. Because spare parts structure must be analysed when this process designing, with intensity, stiffness taller cutting tool bears bigger cutting load, with intensity, stiffness small cutting tool bears lesser cutting load, make different cutting tool can use reasonable cutting dosage, have the life of general close, decrease grind a knife to reach change the frequency of cutting tool. A few specific conclusion that the article sums up apply to lathe of BIEJING-FANUCPowerMate O numerical control only, but the process designing thought that it behaves has common sense. Want the machine program with reasonable and efficient work out, the program language that must want to be familiar with an use machine tool can try to be applied neatly, understand a machine tool advocate parameter, character of the structural characteristic that analyses a spare parts deep, material and treatment craft. Instruction of lathe of BIEJING-FANUCPowerMateO numerical control includes G, M, S, T. Dictate for preparation the function dictates among them, m instruction is auxiliary function instruction, s controls an instruction for main shaft rotate speed, t chooses to dictate for cutting tool. Next watches listed the instruction code with commonly used part reachs a meaning. The G32 of input of relative value of G91 of lead whorl cutting such as G31 of input of absolute value of G90 of meaning of code of symbol of code of meaning of code symbol code jumps program of M00 of linear interpolation of G01 of end of M02 of fixed position of sudden drop of pace function G00, M03 program stops machine G02, G03 to arrange circle and choice of M01 of the interpolation that go against a circle to stop machine G28 CNC Milling CNC Machining