Mr Xiao Ruihua: Regard a machine tool as the mainest fundamental function part, slideway directs system and huge of system of transmission of ball guide screw are affecting the promotion of machine tool speed. Current, li Shile's slideway directs the system has very high rate and acceleration, ball slideway directs systematic speed can amount to 5 M/s; Acceleration can amount to 500 M/s2; Roller slideway directs systematic speed amounts to 3 M/s, acceleration amounts to 150 M/s2 (see a picture 1) . System of transmission of ball guide screw uses pattern of the loop inside ball, reformed motion is characteristic, achieved high speed exercise. Taller stiffness is had on moving direction, have the characteristic such as high accuracy and low noise at the same time. Compare with photograph of linear electric machinery, its have higher feed power, but speed and acceleration are inferior, uphold a requirement opposite also taller. Linear electric machinery is answering the respect photograph such as speed and fixed position precision to have larger dominant position than drive of ball guide screw. But, the whole machine structure that uses linear electric machinery does not have amortize, so, control system is complex, still need to adopt preventive measure to solve magnet to attract cut bits to reach medicinal powder the problem such as heat. Additional, the price of linear electric machinery also guide screw of prep above ball. Asking the application of high traversal speed is medium, li Shile offerred product of guide screw of ball of nicety of high speed series. Cooperate nicety to roll the guide screw that press, the flange type that the special end that has ball loop function covers is only the main element that nut is decision system performance. This end lid is compound place of efficient and tangent loop comes true inside a monomer must all function, assured very tall system stability. The nut that has 4 raceway can hold the ball of more amount, increased laden capacity thereby. Its are the biggest lead is 40 Mm, sharp movement speed can amount to 240 M/min. The system of distributes drive nut FAR transmission of ball guide screw that Rexroth develops, although the guide screw natural frequency of system of transmission of ball guide screw does not have a change, but because two end secure guide screw,do not move, leave out circumgyrate moves, accordingly, because answer the self-excitation frequency that have a change of luck is moved and causes,won't appear. Additional, also was used of Li Shile by drive nut tall accurate treatment, accordingly, also won't produce self-excitation frequency. So, this plan can allow high rotate speed (high linear rate) , and won't produce resonance phenomenon. Compare with photograph of system of transmission of groovy ball guide screw, the speed of this system is very supreme gave 10 times. Graph Nextpage of product of ball guide screw Ms. Han Mei of company of Li Shile of 1 rich world: Enterprise of Ke Er spy already had 30 perennial to produce the history of ball guide screw, the design in ball guide screw, make reached domain of be on sale to accumulate rich experience. Guide screw of ball of Ke Er spy is having distinctive market product to locate, its product includes guide screw of high accuracy ball, big norms not to have guide screw of ball of carry on one's shoulder of guide screw of butt joint ball, burden and nut to come back transition ball guide screw (see a picture 2) . The diameter that normally we offer for domestic leader business is in guide screw of high accuracy ball in the guide screw of 63~125mm, its sheet root can achieve 13 M without butt joint length, precision is between IT1~IT5 class. One is in in production domain of ball guide screw cannot evasive difficult problem is as guide screw length increase, corresponding guide screw precision can drop. For example, in cover with tiles with Dalian at first in the arrange with process of limited company of machine tool of Ding Xishi of machine a place of strategic importance, they also showed this kind of concern, with the machine tool because of production exit the precision to guide screw of big norms ball asks very tall. Examine except the requirement the journey error of groovy Lead/300, the error to every lead also can raise corresponding requirement. The tall disappear of the precision of guide screw of ball of Ke Er spy the trouble back at home besides the user, in the machine tool debug with in using, guide screw of ball of Ke Er spy satisfied the use requirement of the user completely. No matter the guide screw of ball of big norms high accuracy that company diameter is 63~160mm series is quality or price have very strong competition ability. The odd root of 11m of the diametical 100mm that factory of heavy-duty machine tool uses Hua Ding of Qinghai of guide screw of big norms ball, length does not have guide screw of butt joint ball, be a model need not the guide screw of ball of train in excess specified length of the butt joint, no matter be,ask in precision and the Dou Yuangao on product life receives guide screw at be opposite. Graph the ball guide screw that research and development of 2 company of Ke Er spy produce weighs load ball guide screw to expand as the development of domestic leader business, level of design research and development also rises ceaselessly, in ball guide screw choose on gradually incline to high accuracy, heavy load, train in excess specified length is spent and big lead. Guide screw of ball of Ke Er spy complied with the Spain that has experience of guide screw of 30 old production ball just about the demand of home market, provide the product with excellent quality and good service for domestic leader business, continue to hold lead dominant position in domain of big norms guide screw. In the diametical 160mm that for Wuhan milling machine of boring of shift of door of double dragon of numerical control of factory of heavy-duty machine tool offers, length 7. The guide screw that 7m, precision is IT5 class is the product of ball guide screw of the biggest specification that provides for domestic user up to now, its dead load amounts to 250t, move load to amount to 52t. Guide screw of heavy load ball the advance rapidly as modern production technology, emerge as the times require of a batch of another batch machine tool of high speed numerical control. Its ask to have the high speed main shaft with outstanding performance not only, and also raised very tall requirement to feed system. Guide screw of high speed ball deputy it is to point to can get used to high speed to change requirement, contented bear the weight of requirement and the ball guide screw of can exact location deputy, it is the first selection drive that high speed of machine tool of implementation numerical control changes and fixed position component. The ball guide screw in numerical control machine tool often is in predicting load big, rotate speed is high and medicinal powder the job below the condition of hot difference, because this guide screw is easier calorific. The consequence that ball guide screw heats up production to cause is very serious, it is especially in open loop system, this meeting makes feed system loses fixed position precision. Traditional ball guide screw is rotate by guide screw of drive of servo electric machinery drive nut and workpiece movement. To get used to market demand, company of Ke Er spy developed nut to come back transition ball guide screw and hollow model ball guide screw. Guide screw of ball of transition of nut of guide screw of ball of nut transition coming back coming back is servo electric machinery drives nut to rotate directly, drive workpiece is mobile, reducing calorific, reduce moment of inertia to reach reduce the respect such as noise to have good performance. Heightening effect of feed career side especially very remarkable. When engineering personnel is being designed, classics regular meeting encounters such situation: The working distance that asks as a result of machine tool place is greater, be in normally 7m above, considering the self-prossessed problem of itself of common ball guide screw, guide screw moment of inertia is too big, because this must take the kind of gear rack drive. And as it happens of guide screw of ball of transition of nut of Ke Er spy coming back can overcome guide screw self-prossessed the flagging problem that pose, take the reasonable kind that prop up, guide screw of ball of theoretic nut transition coming back can grow indefinitely, be restricted to exceed equipment offerred perfect transmission solution. CNC Milling