The applied experience of the knife that insert tine is long Chang Xin

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  • source:KAPLOWITZ CNC Machining
The heretofore that insert tine still is treatment gear of the shoulder that take a stand, much couplet gear, inside tine the commonly used method that wait. The advanced knife that insert tine workmanship very the reception that gets gear tool manufacturer, main delibrate tooth form has the article the figuration grinding craft of the knife inserting tine that ages the top pours wine cup. A few years ago, some gear expert ever predicted, will insert tine knife to will decrease greatly in the application of gear cutting respect henceforth, to in those days, will produce enterprise reuse to insert tine knife without car gear, when the design makes positive drive device, also use the craft that insert tine to machine gear no longer. Think commonly: The craft that insert tine is the gear cutting method that uses below the circumstance that cannot machine with hob in gear, quality of tall, gear needs fee of method of this kind of treatment. In fact, the gear that is the shoulder that take a stand undertakes tooth form is machined and inserting tine is used. If the graph is shown 1 times, the issue that because cutting tool is interfered,takes the gear of stage shoulder cannot use gear hobbing treatment commonly. Graph 1 undertake inserting aging machining to bringing the gear of stage shoulder with the knife that insert tine besides, the knife that insert tine is used extensively also then the internal gear of straight tine, inclined tine is machined. Haply, if gear is used inside tine broaching craft is more difficult, use treatment of the knife that insert tine with respect to need. The defect of the treatment that insert tine depends on, compare with gear hobbing photograph, the cycle time that its machine is longer. Additional, when the knife that insert tine is machining gear, because both clench the teeth moves, the appears possibly error on tooth of the integral error of the knife that insert tine, knife that insert tine or be out of shape (the attaint that if crackle, tooth wears away,reachs tooth) , can deliver treatment gear to go up. Once the teeth of a cogwheel of gear is destroyed,cannot use. Nevertheless, did not get confirming however later to the pessimistic prophecy of slotting tool at that time. Contrary, insert one of cutting tool that tine knife or gear cutting industry use the most extensively. Why to meet such? Its are main the reason is: Above all, with gear hobbing craft treatment produces gear to need fee than using slotting tool much, next, as technical development, high accuracy, efficient contemporary the machine that insert tine and the cutting rate that before inserting tine knife to be able to be achieved at present a few years, think hard and efficiency. As a whole, of efficiency of major gear cutting tool rise, should be attributed to those who use better cutting tool stuff and TiN coating technology and device to improve. As to the machine tool, have the system of contemporary numerical control that optimizes function of all treatment movement, operation to be able to shorten greatly the cycle time of treatment. Say besides afore-mentioned place besides, the plan that a lot of returning had been not carried out completely can make hob and the gap that plug tine knife to go up in the technology shorten further. This matters to the new-style machine that carries manufacturing gear cutting tool. Although cannot make full use of gear cutting tool and grind a frequency to have restriction again, these machines also are helpful for reducing operating costs. The specification is as follows: If the graph explains 2 times, a round diameter Di and tine top let pour horny height Sm to keep consistent hard when grinding inserts tine knife. Because weigh the wheelbase that tine knife and gear insert after grinding and transverse tooth thickness of the knife that insert tine,this is of this two parameter decrease, the tine that is the same as slotting tool itself impossibly carries horny height and the rake that pour horny place to go up in top having a tooth-like part of anything on the head to obtain consistent. Graph 2 round diameters and tine top pour horn to insert tine to change because of life in the process and change somewhat in the knife that insert tine show 1 times like the graph again, of wheelbase I reduce theorem of maths of strict comply with. Mathematical model is being included let wheelbase change and H of height of the knife that insert tine unworthily trigonometry equation. Contrary, the rake that ages the top repairs form St and tine top to pour wine cup with linear relation correspondence. Both reduces comply with linear according to inserting what tine knife up spends the relation is formulary and change. The requirement that achieves afore-mentioned goals depends on passing translation emery wheel and receive the wanted knife that insert tine. This kind of emery wheel, besides involute campaign is launched on cutting tool double tooth flank, still launch the axial campaign that makes tine carries horny rake linear on the head. Nowadays, advanced the workmanship of the knife that insert tine very suffer cutting tool to produce business reception. All the time since, a lot of manufacturer still use the machine that contains fixed emery wheel. The arenaceous wheel pair that these machines use ages the rake that carries horn on the head produces very big effect. That is to say, the tine of diagonal carries horn on the head to appear on the tine root of gear. Consequently, in process of cutting tool life, the change pouring wine cup on gear is very big. Besides the account that a moment ago introduced, change pouring wine cup also depends on the emery wheel diameter of root of H of height of the knife that insert tine and grinding tooth flank, tine is numeric. The contemporary blade that is used at grinding shave tine knife is ground machine is OK grinding of ground of without striking a blowing inserts tine knife. Such conducing to weave forthrightly software form and the speed when accelerating grinding to circulate. However, because use, is translation emery wheel, reason ages the problem with the inhomogenous rake that carries horn on the head returns existence. The emery wheel photograph that uses with machine of grinding of the knife that insert tine is compared, the diameter of translation emery wheel is bigger (750 millimeter are controlled) , and the diameter of fixed emery wheel has about 250 millimeter only. Graph 3 can see method of two kinds of grinding. The plan differs two kinds when 3 figuration grinding machines method: Secure emery wheel grinding, if we want to make insert tine knife,be in with grinding of translation emery wheel cutting tool makes full use of on the height of 15-20 millimeter, so at this moment it is very big that gear pours horn to change. But if effective tooth depth can narrow 50% , come to can narrowing the gear of automobile industry namely 7.

5-10 millimeter. Tell further, the application of cutting tool depends on dentiform type. Do not calculate tine top to pour wine cup inside, tooth form has tumour head, tine to carry the knife inserting tine of complete arc diameter and big helix angle on the head, through grinding of machine of traditional roll flute this kind of cutting tool, numerical value of effective tooth depth is finite, be like 12-14 millimeter. If insert tine cutting tool to age through shave machine of knife roll flute undertakes grinding likewise, the true application of cutting tool is more finite, reduce one times probably. The advantage of this method is confined to what use inside limits of batches of the prototype that make, small gear to insert tine knife. From the graph the axes of the 4 positions that can see the knife that insert tine and emery wheel has slant buy. Such slanting buy makes cutting tool ages the rake on the root is decided by us. We reduce the effective tooth depth of cutting tool one times suppose, those who pour horn and root round diameter become poor to also be reduced somewhat, go up with standard cutting tool probably smaller than rising. Accordingly, with identical the knife that insert tine getatable gear, the amount is in the standard the condition plays fertile in part. But because use up rolled steel the quantity is little, the price also reduces half left and right sides. The price falls to follow the transverse tooth thickness with the cycle time with grinding the shortest construction, the smallest cutting tool to be concerned again substantially. Additional, add workpiece with getatable of identical cutting tool number is little, this makes the cutting tool that contains same characteristic more with respect to need. Graph the axes position of the 4 axes that tine knife inserts when undertaking figuration grinding and emery wheel slants buy to shorten further grinding cycle time, can grind through shave tine edge machine at the same time grinding double tooth flank, make corresponding rough sketch to emery wheel. Below this kind of circumstance, the effective tooth depth of the knife that insert tine is more finite. Should notice, the involves tooth form to have tine to carry horn on the head only knife inserting tine that tells so far. The can use knife of the tine that grind shave contemporary blade that carries horn on the head without tine is ground machine is informal grinding. A lot of cutting tool users aux would rather use shave ages knife, because this cutting tool has a series of advantage that cannot ignore,basically be, for example: ? Does ┯ κ go straight towards Qi shank ⒉ to sincere  of ∨ of helmet of Tuo of  of lowing ⒃ of Zhang of Bo joke Qiong seeks Jin of food of Kuo of Ping of salt of  of  of heart of   ⒂ ancienting name for a water catltrop to ferocious be Xi rank plutonium? CNC Milling CNC Machining