0 forewordProduction technology is the mark that measures level of industrialization of a nation, develop at full speed as our country economy, our country manufacturing industry obtained great progress. The has quantity and technical level on any account of numerical control machine tool is a country the important sign of actual strength of modern manufacturing industry, current our country is in the crucial period that creates big country to transform to mechanical production power from machinery, numerical control machine tool applies extensively already in the industry such as industry of auto industry, aerospace, mould. It improved quality of the performance level of component, treatment and manufacturing efficiency, the use person that is numerical control machine tool created tremendous benefit. 1, domestic and international numerical control transforms research current situationA few developed countries such as Japan, beautiful Europe are transformed to numerical control take seriously very much, a few production enterprises use up method to transform general accuracy machine tool into numerical control machine tool to promote company core competition ability to want, even some of company turns numerical control of general accuracy machine tool transform development to become an industry, the Schioess company that is like Germany, US equipment company of the United States, these companies are numerical control of world famous general accuracy machine tool is changed transform a company. Be produced technical limitation at that time, general accuracy machine tool of our country mechanical manufacturing industry makes treatment in machinery there is proportion of about 80% equipments in course of study, numerical control changes rate very low. Because accuse to change when duration,transform a technology to lag behind relatively, our country numerical control changes a machine tool to transform a technology to basically apply in equipment of machine tool of national defence for military use, from 20 centuries 80 time did not rise, technologists of large quantities of one machine tool of perfectness numerical control are changed to numerical control of general accuracy machine tool transform a technology to undertake a large number of fruitful development study, gained quite remarkable success. Numerical control of 2, general accuracy machine tool changes transformed necessity2.1 general accuracy machine tool are put in inadequacy below digital environmentGeneral accuracy machine tool accepts technical restriction, in treatment efficiency of stability of quality of precision, treatment, dependability, production, improvement works respect of modernization of condition, production management and photograph of numerical control machine tool are very further than differring. Craft of general accuracy machine tool simple, function is single, can undertake onefold working procedure is operated only, and to component of more working procedure, complex component production asks that he cannot be finished. Handling time and auxiliary time affect efficiency more, general accuracy machine tool machines precision automation rate is low, low, a lot of unit operation of cargo handling depend on a worker to operate, labor intensity is high, product quality consistency is poor, often cannot assure to machine spare parts high quality. Numerical control of 2.2 general accuracy machine tool turns the advantage that after transforming, hasFlexible better, numerical control machine tool is different general accuracy machine tool needs to make a lot of clamping apparatus, mould often change when machining component, the spare parts is machined on the numerical control machine tool after transform, the key depends on the design of the program, input, editor, do not need to often be adjusted to the machine tool; Stability of quality of treatment spare parts, consistency is good, in the treatment on machine tool of a numerical control a batch of spare partses use similar machine program and cutting tool, treatment condition agrees completely, contrail taking a knife is identical; Manufacturing efficiency is tall, numerical control machine tool and photograph of general accuracy machine tool are compared, the auxiliary time that coordinates a spare parts with the knife library of machining center and handling time can decrease effectively, numerical control machine tool allows the puissant cutting that the machine tool undertakes bigger cutting is measured, the limits of feed expands. Additional, cooperate to use with the knife library of machining center, can come true to have the successive treatment of much talk working procedure on a machine tool, the turnaround time between working procedure decreases greatly, improved productivity. The treatment precision of numerical control machine tool can amount to 0.05mm commonly — 0.1mm, pitch of lever of silk of numerical control machine tool is average the feed backlash of error and transmission catenary can be compensated by march of numerical control device, numerical control machine tool is to pass digital signal form to realize control its machine precision, machine tool every are mobile equivalent of a pulse needs to output one pulse signal by numerical control device, accordingly, precision of fixed position of numerical control machine tool is taller. Use modernization to produce government, when numerical control machine tool undertakes the spare parts is machined, the clamping apparatus that can use to place, cutting tool undertakes standardization, reckon this spare parts assists time, handling time accurately, achieve modernization administration. Numerical control machine tool and photograph of general accuracy machine tool work than was being improved condition, machine tool of good numerical control is adjusted before treatment, input a program and start, numerical control machine tool undertakes automatically machining to the spare parts continuously, till spare parts treatment is finished. The numerical control below environment of 3, number is changed transform measure3.1 sufficient understanding are transformed machine toolNumerical control machine tool is commonly by measure composition of servo and system, numerical control system. Numerical control of general accuracy machine tool is changed transforming is to want after all local transform or transform entirely should transform charge and original parameter function decision by general accuracy machine tool. Change in numerical control precision of existing the function that needs to transform a machine tool, parameter, mechanical drive, moving situation should understand above all in transforming a process, whether can the function after reckonning general accuracy machine tool is transformed beforehand again satisfy a requirement, specific should make clear following item: (1) the type that needs to transform general accuracy machine tool certainly. (2) accurate to needing parameter of transformed orgnaization of general accuracy machine tool, performance data to want to hold. (3) numerical control of general accuracy machine tool is changed transform, ying Shen chooses to control axial amount again, because number of axle looks,immediate decision chooses system of which kinds of numerical control to match to it. (4) numerical control of general accuracy machine tool is changed before transforming, must be clear that component of function of core of primary machine tool is like gear-box, tool carrier to wait, such ability make sure numerical control changes the machine tool after transforming to be able to produce treatment complex part. (5) precision requirement and function are achieved to anticipate after be being transformed to make sure numerical control of general accuracy machine tool is changed, change the place of numerical control machine tool after transforming to have parameter function and rigid structure parameter to want to have enough estimation to numerical control. (6) numerical control of general accuracy machine tool changes the parameter of a few auxiliary safety performance that before transforming, needs to understand a machine tool, in order to make sure the person of personnel of the operation after machine tool numerical control is transformed is safe. (7) the requirement that numerical control of general accuracy machine tool changes the electric control system that in transforming a process, considers to have even to whether can satisfy machine tool of the numerical control after transforming, if cannot achieve a requirement, must pass but controller of process designing logic will undertake transforming. 3.2 be based on type selecting of system of the numerical control below digital environmentBe based on numerical control of the general accuracy machine tool below digital environment to change transforming a key is type selecting of numerical control system. The orgnaization parameter that the basis when type selecting needs to transform a machine tool, performance data chooses appropriate numerical control system to match to it, after ability makes sure general accuracy machine tool is being transformed according to beforehand the function with acquiesce good plan asks to undertake the spare parts is machined, cannot achieve a function to anticipate otherwise. The function on the market the numerous and complicated of numerical control system with differ, different type is numerous, be in consequently when be based on system of numerical control of the choice below digital environment, should mature the function of the general accuracy machine tool before transforming and the precision requirement that characteristic, numerical control changes the place after transforming to want to achieve, function anticipates and anticipate transform expense; And the technical support that the manufacturer that picks numerical control system when special attention wants to transform when selecting numerical control system can provide. System of different numerical control has diverse particular demand to needing the rigid structure of transformed machine tool, actuating device, either all machine tool can undertake counting accusing to change transforming, not be more any needing numerical control is changed transform machine tool and system of all and different numerical control to match, must choose appropriate numerical control system to match to it, ability achieves numerical control to change transform a purpose. The 3.3 rigid structures that are based on digital environment to fall are designed and transformNumerical control of general accuracy machine tool is changed transforming a key is type selecting of numerical control system, but transform a machine tool to achieve system of parameter of treatment precision, function, electric supply and machine tool to make numerical control is changed the requirement such as safe operating rules, part of rigid to the machine tool in transforming a process structure must be redesigned, transform. Above all, be based on the rigid structure below digital environment to design a requirement. Must want to wait for mechanical component to undertake force is analysed sufferring to machine tool transmission shaft, in order to ensure numerical control machine tool can undertake the puissant cutting of bigger cutting quantity, undertake occupation standard of machine tool of the basis when the analysis and national level are carried out getting power. The basis gets result of force analysis, computation, transform a machine tool to achieve security of system of parameter of treatment precision, function, electric supply and machine tool to make sure numerical control is changed certainly what the requirement place such as the operation needs is main the size dimensions of spare parts of machinery getting power and supply power plant, numerical control is changed transform a machine tool when undertaking design and be transforminged to rigid structure, can consult transform successful case, consult data of relevant technology file, to transform successful company scene on-the-spot survey. Undertake CA6140 common lathe counting accusing to change transforming, following requirements must come true in whole design process: Of former lathe advocate transmission system gives reservation, transverse feed system realizes open loop control by personal computer, two axes linkage; Tool carrier uses automatic dislocation tool carrier, have the function of cutting whorl; In X up, feed pulse equivalent is 0.005mm / pulse; In 3 — limits of 1000mm/min feed speed has stepless speed regulation, in X to, 1000 — speed of speed of set of the random inside 3000mm/min. Next, be based on the structure of machine tool machinery below digital environment to transform a requirement. Be in as far as possible the dimension when mechanical component is transformed is changeless perhaps change not quite, the device of mechanical drive structure that uses ideal satisfies the biggest drive to compare, machine efficiency in order to increase production; The mechanical component that needs to transform must achieve particular precision demand, be like exterior surface roughness, form tolerancepublic errand, hardness, intensity in order to ensure between athletic component smooth, reduce attrition resistance; In do not need to increase dynamic circumstance to fall, can make sure numerical control is changed after transformingthe machine tool can produce the part with more and sophisticated treatment. Transform CA6140 common lathe lathe of economy numerical control, of transverse feed orgnaization transform: Will small procrastinate board move tool carrier to transform numerical control tool carrier with the hand; Nut of ball guide screw deputy replace smooth box of board box, polished rod feed and common silk lever; The reservation of incorporated hand-operated device that adjusts an operation is changeless, at the same time reservation supports a construction, gear case body, pace is in into electric machinery installation in procrastinate board hind side, gear case uses decelerate of one class gear. 4, last wordThe article already elaborated the crucial step that transforms general accuracy machine tool amount to to charge a machine tool mainly, put forward numerical control to change transform course of technology of general accuracy machine tool, with period the company that transforms to needing to undertake numerical control of general accuracy machine tool is changed is helped somewhat.