High speed is machined (HSM) have a lot of advantages, but should reduce cutting cost already, want utmost ground to produce the advantage that high speed machines again, still need to overcome a lot of difficulty in actual production. In high speed treatment, when cutting rate increases, cutting force will be reduced, use this one characteristic, can give the part with dimension public errand and exterior smaller surface roughness through increasing main shaft rotate speed to machine. Although high speed machines Shang Moming to be defined truly, but 500000r/min can be achieved in rotate speed of the main shaft in certain experiment, 100000r/min can be achieved in actual production. When because become,main shaft rotate speed exceeds 8000r/min, rotate the spare parts needs to have a balance, because this can machine high speed the definition,be rotate speed not under 8000r/min. When main shaft rotate speed under 8000r/min when, distributing when arbor quality only very lopsided when, ability meets centrifugal force to produce adverse effect to treatment. uses an amount to increase ceaselessly as the machine tool of 8000r/min of prep above of main shaft rotate speed, the balance issue that sets cutting tool appears significant all the more, it involves cutting tool and knife clip. Should rotate the academic center axes of arbor and actual axis of rotation are different when the heart, can produce lopsided situation. Whether does need to make a lot of issues should consider when the balance to cutting tool when the decision, and the person that normally the circumstance issues a lot of use often ignored these issues. Among them a the most crucial question is to be in the cutting tool when high speed is machined is lopsided the attaint to bearing of machine tool main shaft. Lopsided cutting tool can increase an additional load to main shaft, cause main shaft bearing to wear away prematurely thereby with invalidation. This is caused not only repair and change the expenditure of main shaft bearing is wasteful, and because the meeting stops machine the loss that causes manufacturing time. Lopsided meeting reduces cutting tool cutting tool function and life, also can cause at the same time brace up quiver, make machine exterior quality to become poor. cutting cutting tool and cutting tool collet (especially 7: 24 awl handle) put in a lot of potential lopsided factors. When main shaft rotate speed increases, centrifugal force can cause appreciably of main shaft aperture to swell, and the awl handle of arbor cannot swell along with main shaft, this can reduce the interface of arbor and main shaft to accumulate, reduce connective thereby firm sex. is designed through the change and choose knife clip and cutting tool carefully, can amend a few lopsided elements. This means symmetrical design to be able to avoid on certain level lopsided. Move to taking however of the spare parts adjustable the arbor of arbor and asymmetry, need to use cutting tool to balance regulating system. Use at high speed is machined when assembly type cutting tool, the design factor that should consider awl handle arbor carefully, choice that balances adjustable element and cutting tool precision and symmetry. The taper dimension public errand of arbor of awl handle machines the function of cutting tool to have very big effect to high speed. The accuracy class of taper can consult normally international standard ISO 1947. Taper public errand is the public errand of the aperture of main shaft locking that in order to examines to influence arbor is balanced and beat and arbor taper. Grade of public errand of taper of machine tool main shaft is AT2 commonly, but AT3 is better. besides taper public errand, in cutting tool in assembling, still need to consider other factor. Each public errand is met cumulative what cause cutting tool together is prejudicial. The length of system of clip of jumpy, knife mixes the circle that these elements include cutting tool other part (like collet, snap ring) symmetry. is in high speed treatment, we must be clear about cause lopsided element and reduce lopsided measure. Affect rate among them the biggest is knife clip. In high speed treatment, should clip of knife of design of preferential use balance may move balance knife to place. Balancing design knife to place is place a balance to spend to the knife from the design give assure, but cannot compensate what cause by other part in rigging a process is lopsided. Right now, what cause by other part suppose only is lopsided be but of oversight, but in be being produced actually often unworkable. Lopsided volume should be measured when accordingly we suggest to using this kind of knife to place, inside the limits that makes sure its allow in the standard as far as possible. is adjustable balance knife clip is divided give on the design outside assuring, still can compensate what in rigging a process, cause by other part is lopsided. Manufacturer people had used a lot of methods to balance a knife to place, if use ball of bolt, steel, adjust annulus and carbon block for the adjustment. is adjustable the ability with lopsided compensation of balance knife clip is finite, below a few circumstances, because lopsided quality is too great, down to cannot make cutting tool restores a balance, the rotate speed that brings about a machine tool to cannot press a set thereby runs, right now need reduces a machine tool rotate speed and assemble cutting tool afresh. The element that other restricts high speed to machine still includes workpiece material, workpiece to hang extend deepness of profile of quantity, clamping apparatus, cutting tool, cutting to wait. balances a process to be able to improve cutting tool and the quality that the knife places to distributing, make both the lopsided centrifugal force with the smallest generation when rotating. Balance a process to involve all lopsided elements impossibly however. The lopsided quality of any degree will cause vibration. Knife clip reachs structure of its installation, machine tool to wait to will affect oscillatory feature. ISO 1940/1 and ANSI 2. 19, 1989 it is the standard that the definition spends evenly. Two standards all are on economic base, application " G " grade system stipulated the balance asks. For example, spend G2 evenly.
5 mean circumferential and oscillatory speed not to exceed 2.
5mm/s. These grade appear as what high quality machine tool, cutting tool and knife place and rise ceaselessly. Spend when formulary balance when cannot be being achieved, should reduce main shaft rotate speed. CNC Milling