Logical choice milling cutter and milling are politic

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  • source:WILK CNC Machining
The new development of milling technology makes manufacturer possible through improving treatment efficiency economic and many time and money. From choose appropriate milling cutting tool to machine the task, arrive to use scroll to cut a way in face mill treatment, and undertake with milling cutter when the condition suits Kong Jia is versed in, manufacturer can be in need not invest the situation that buys new facility to fall, improve productivity considerably. When the choice suits to machine the milling cutter of the task, all sorts of factors that must consider to pledge from material of workpiece be goinged to by the geometrical appearance of treatment spare parts and dimension. Be in machine job shops, the case that has planar milling with milling cutter of 90 ° square shoulder is very common. Below certain circumstance, this kind of choice has its rationality. If the workpiece appearance of need milling is irregular, or cast surface can be brought about cut deep quantity to produce change, milling cutter of square shoulder may be optimal choice. But fall in other condition, the milling cutter of 45 ° face that chooses a level may benefit is more. When milling cutter when cutting horn to be less than 90 ° , because cut bits to attenuate, axial cuts bits ply to be able to be less than the feed rate of milling cutter, criterion milling cutter cuts corner the influence with very large generation of will applicable to its every tine feed. In face mill treatment, cut the face milling cutter that is 45 ° into horn to be able to make cut bits to become thinner. Reduce as what cut corner, the ply that cut bits can be less than every tine feed, and this can make feed rate rises conversely 1 original.

4 times. Below this kind of circumstance, if use the face milling cutter that cuts horn to be 90 ° , as a result of unavailable the axial that place of milling cutter of 45 ° face produces cuts bits to reduce small effect, productivity can reduce 40 ％ . Another when the user often can ignore choice milling cutter important facet -- the dimension of milling cutter. A lot of job shops are right large part (be like engine cylinder body or plane structural member) when undertaking face mill is machined, it is the milling cutter with use lesser diameter, this left very big room to improve productivity. Below good case, milling cutter is due the cutting blade of 70 ％ participates in cutting. For example, milling when the many surfaces of a large part, the face milling cutter of 50mm of a diameter will have 35mm to participate in cutting only, reduced manufacturing efficiency thereby. If use the milling cutter with bigger diameter, with respect to can economic many handling time. Another kind of way that improves milling treatment is the milling strategy that optimizes face milling cutter. When undertaking machining process designing to planar milling, the user must consider cutting tool to cut the way of workpiece above all. Normally, milling cutter is simple ground cuts work directly (graph 1) . This kind cuts means to be able to accompany very big concussion noise normally, because exit cutting when bit,this is when, milling cutter place arises cut bits the thickest be caused by. Because bit forms very big impact to workpiece material, often can cause vibration, arise can shorten of cutting tool life pull stress. Graph 1 milling cutter cut workpiece to be able to cause vibration and generation to pull stress Nextpage directly a kind of better feed way is to use scroll to cut a way, below the circumstance that lowering feed rate and cutting rate namely, milling cutter scroll cuts work (graph 2) . This means milling cutter to must arrange hour hand to rotate, ensure its undertake machining with arranging mill means. Such formation cut bits by thick to thin, can reduce what vibration and action provide at the knife to pull stress thereby, pass into more heat in metal cutting in cutting bits. Cut the way of workpiece every time through changing milling cutter, can make cutting tool life is lengthened 1 - 2 times. To realize way of this kind of feed, the process designing radius of cutting tool method should use the 1/2 of milling cutter diameter, increase to arrive from cutting tool of workpiece slant buy distance. Graph the way that 2 scroll cut a law to be able to reduce what vibration and action provide at the knife to although scroll cuts a law to basically be used at improving cutting tool to cut work,pull stress, but same treatment principle also the other level that applicable cuts at mill. To the planar milling treatment of large area, commonly used process designing means is to let the full-length successive of workpiece of cutting tool edge walk along knife milling, finish Chengxiayici in opposite way cutting. To hold amount of constant radial penetration of a cutting tool, eliminate vibration, the means taking a knife that uses the knife below helix and corner of scroll milling workpiece to be united in wedlock the effect is normally better. Machinist people the cutting noise that causes to vibration is very familiar, it happens when cutting tool cuts work normally, or cutting tool undertakes below condition of penetration of a cutting tool 90 ° change direction quickly when. Corner of scroll milling workpiece can eliminate this to plant noise and prolong cutting tool life. Generally speaking, the corner radius of workpiece should be milling cutter diameter 75% - 100% , can shorten so the arc length of penetration of a cutting tool of milling cutter and reduce vibration, allow to use higher feed rate. To prolong cutting tool life, in face mill treatment, the Kong Huo that should avoid cutting tool to go up from workpiece as far as possible interrupts place to pass (if possible sentence) . Present milling cutter from an aperture among when passing, cutting tool is in a side of aperture is suitable mill, and the other a side in aperture is to go against mill, such meetings cause very big impact to bit. To bypassing when process designing of cutting tool method through be in aperture is mixed sunken antrum, can avoid to produce this kind of situation. More and more Nextpage manufacturer use milling cutter to machine aperture with helix interpolation or circumferential interpolation means. Although this is planted,treatment speed of the method is slightly worse than bore, but have an advantage more however to a lot of treatment. Be in irregular apparently when bore, broach gets work very hard possibly along central line, bring about broach to produce deflection in workpiece surface thereby. In addition, every machine broach the aperture of 25mm, need the power of about 10 horsepower, this is meant, when the bore on small-power machine tool, the optimal power that short of place needs the likelihood is worth. In addition, the need on certain part machines the aperture of a lot of different measurement, if the knife library capacity of the machine tool is finite, use hole milling means to because change,can avoid a machine tool cutting tool and stop often machine. When using milling cutter hole milling, cutting tool dimension becomes particularly important. If relative to at bore diameter character, the diameter of milling cutter is too small, add man-hour to may form core of a makings in the center of aperture. When this makings core drops, may damage workpiece or cutting tool. If milling cutter diameter is too big, can damage cutting tool itself and workpiece, because milling cutter is absent central cutting, collision may happen in cutting tool bottom. In addition, when using milling cutter hole milling, answer to undertake machining process designing from the central line of cutting tool. Because use but when milling cutter of type of dislocation razor blade undertakes helix interpolation milling, the feed rate that the predestined relationship outside bit manages can compare central part to be gotten high much, and process designing personnel can ignore this sometimes, use the exorbitant feed that exceeds a knife to provide effective working range to lead inadvertently. Through choosing appropriate milling cutter, make cutting tool is mixed with vibration pull the kind with the least stress to cut workpiece material, know below which kinds of circumstance hole milling compares bore treatment is more effective, manufacturer processes work semifinished product elegant spare parts with respect to ground of can efficient, low cost. CNC Milling