Reduce in accurate machine application cost and improve quality

Time:2023-06-29 13:52:01
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source:XIMENG CNC Machining

The article basically introduced at present on the market a few common kinds filter the method evaluated them the influence to machining craft. The efficient function of coolant and lube is an enormous challenge to the engineer of world each district and machine tool operator. Maintain liquid cleanness to be opposite without metallic impurity the technology such as abrade, bore, honing, polish, EDM and other finish machining is crucial. Efficiency filters lowly to affect the finished product quality of product line badly, influential also to making efficiency and trash management wait. Protective screen filters (bag of filter canister, filter and filter disc) the commonnest perhaps filter the protective screen that means uses some kind of form namely, the grain in liquid of the purify when classics protective screen or loop spreads in the liquid. Protective screen has a lot of kinds of forms, it is the form of bag of filter canister, filter or filter disc normally nevertheless. The medium that they used certain length (basically be to flow delay, braid or spin polypropylene, polyester or cellulose material) , can plait and the appearance of canister of make it filter (increase the surface to accumulate) thereby, spread out or circle on axial core (use at deepness filter) , bag of make it filter (facilitate use or install more dirt) flat perhaps the filter disc data that maintains hank open and flat on frame. Fundamental has a lot of alveolus on these protective screen namely, for instance the aperture of 40 micron size, the contaminant that is more than this dimension among them in liquid shedding outdated can be given by filter. Protective screen filters can bring about pressure to drop, of this pair of use medium filter to already advantage also has disadvantage. It is with filter canister exemple (of course the working principle of filter bag and filter disc also is very much the same) , if measure is true, when filter canister system is beginning to use press difference very small (pressing difference is point to filter upper reaches or before with filter downstream or the poor) between the pressure later. Be given by filter from inside the system as contaminant, these contaminant begin to jam medium of partial filter canister, bring about press difference to lift. This kind of circumstance will last, until press difference to arrive high upriver pressure cannot be overcome, at this moment filter canister can be jammed thoroughly. In be being used actually, downstream pressure can fall a level that cannot use, or it is the circumstance that appears to flow, and before producing this kind of situation, open regular meeting set the biggest press difference, should achieve the biggest when pressing difference, filter canister has jammed basically, or tries clean, but more it is to be taken out discard and change new filter tube. The main benefit that protective screen filters has: Control easily -- the advantage that presses difference is the service life that it can be operator clearly or machine manufacturer indicates filter, and when should take out and change filter canister, still can use a simple system to read take downstream pressure to fall, in order to spark filter of steer clear of of automatic machining center (or in duplex operation system switch comes another shunt-wound filter) or shut a machine. Capital cost -- the value that another advantage that medium filters is it is relatively inferior (although sexual price is compared not certain tall! ) . Filter supplier can reduce the cost of filter crust normally, because the machine of a new setup is met,be in later in a lot of years bring rich and generous income because of the sale of one-time medium. In polluting the application with inferior level, protective screen filter can reflect a very high value. Dan Bing barrier filters the law also is put in blemish, basically include: Change and deal with cost -- the need after filter canister or filter paper are jammed by contaminative grain tries to change, of refill-unit of filter of as time passes purchase cost the meeting is very tall, and take out and change old filter still can produce shutdown time. In certain technology, filter may be about a few days to change. In addition, deal with cost also is more and more the problem that is paid close attention to. The filter of oily to getting pollution, deal with cost is quite high. As ISO 14001 roll out and the attention to enterprise society responsibility, a lot of companies formulate environmental protection policy of the innovation, devote oneself to to reduce craft trash continuously. Efficiency is finite -- losing of this kind of pressure another defect is, it restricted what can achieve below feasible condition to filter level. Accordingly, filter in what place of give attention to two or morethings needs level and maintain velocity of flow and economy filters feasibly between the level, medium filters is a kind of eclectic approach from beginning to end. Affect velocity of flow to avoid commonly, filter ability can be set for 40 micron. But this means the grain that is less than this dimension still in the liquid that consist in flows, bring about thereby wear away, reduce spare parts surface to machine quality, shorten engine oil / coolant service life. This asks to the precision such as car component, bearing and medical treatment things extremely expensive product, be weigh wanted issue particularly. The protective screen that there still are a variety of other kinds in industry of course filters system (the) such as pulverous, fault shedding, but mix as bag of filter canister, filter filter disc is common, and also have a few afore-mentioned drawback. Powder or candle body system still have other drawback, for instance pulverous processing and the health related to this are mixed safe problem, the fault sheds a system (hopeful use number changes again after year filter canister medium) it is a kind of good method that reduces dependence of pair of bad news material, and a lot of can repeat use repetition profit, but cost is very high, and taller to the dependence of the sources of energy. Sedimentation some craft do not have groove to filter particularly medium, the nature that relies on contaminative grain however sedimentations. The liquid is smoked during the loop in chamfer of a memory, bigger over grain can sink in gravitational action fall. Subsequently, below certain circumstance, these grain can keep clear of by scraper conveyer, or accumulate till these grain below certain circumstance to certain and critical point, repass is artificial the hand moves cleanness. Sedimentationed main benefit has: Need not spend money to buy all the time filter medium -- the one-time filter that should not change, run cost to want continuously so under other method. Weakness is as follows: Contaminant purify efficiency is low -- sedimentation be not filter truly, without the method of protective screen or detached grain. What it relies on is the weight of grain oneself, and depend on the liquid is in sedimentation the time that keeps in groove. If the liquid has flowed quickly, sedimentation effect criterion very little. Because this sedimentations,divide bigger or heavier grain to filter only effective. Lighter grain still stays in the liquid to relay follow on current is connected. This is put in attaint risk to finished product or machine. Clean shutdown time -- in the craft in sedimentary without any automatic purify pollution method, clean memory chamfer is the work with a quite high cost. Because it needs longer shutdown time, and want change thoroughly liquid. Cyclone of Nextpage cyclone depart, centrifugal or system of depart of fluid coming back is alive bound each district has wide application. The dimension of these systems, price and complex degree have each different, but general principle is to use the density of liquid and contaminant to differ will sedimentation naturally quickly. The liquid that is polluted by inspiratory the round cone-shaped segregator of a perpendicular installation, high speed of wall of liquid edge container flows. Contaminative grain is swung to go out below the action of centrifugal force, be answered the function that control to fall. Contaminant comes out from the depart in the liquid, through issueing excessive mouth eduction, and clean liquid flows into clean fluid chamfer through excessive exit. The gain with separate cyclone has: Do not use filter medium -- the issue that did not change and defends protective screen filter. The deserted filter that because this won't produce cost of bad news material and need,deals with. Without athletic component -- cyclone filters to do not have any athletic components normally, the possibility of occurrence breakdown is accordingly less. The defect of cyclone system has: Filter finite -- cyclone system normally can filter gives bigger contaminative grain. Get the limitation of craft, they filter to low density or the little grain under 5 micron the result is bad. As a result of cannot filter divides little grain, use this kind of method to be able to bring an issue to high accuracy treatment alone so. Gao Wei protects cost -- system of a lot of cyclone needs fixed cleanness, the contaminant that eliminate accumulates, prevent to issue excessive mouth to jam. High investment cost -- in application of bed of large scale computer, the capital investment of cyclone system wants prep above other to filter method. Magnetism filters the fundamental that magnetism filters is the position that all in current method current must pass place stick of high strenth permanent magnetism, from inside the liquid through sufficient contact purify contains iron contaminant. Magnetism club should take out cleanness regularly, next again replace former. From simple suspension the city in lubricant box makes work magnetic body, to need not the high strenth of 24 hours of any operator interpose, round-the-clock movement designs automatic and clean system, the magnetism on the market filters and separate facility is varied. A lot of abrade had used bosomy magnetism with milling production factory, it is tie-in medium coils normally the system is used, some still can hang magnetism club in filter bag, but the magnetic force that the efficiency of these systems can be used magnetic body normally, contact time that bring to bear on (the time that the liquid has shed in the area of the can adsorptive grain that contain iron) or the limitation of the element such as the fluid quantity that contacts magnetic body actually. To come true the most effective inferior micron class filters, of the design filter system must can ensure all pollution fluid can be exposed in magnetic body environment enough long time, and the enough of magnetic force intensity of magnetic body is epispastic the contaminant in the liquid. This kind of system is returned must easily clean (if be a hand,use a system) or can undertake automatic cleanness reliably. To achieve needs magnetic field strength, attain ideal thereby filter the effect, the magnetic body material of first selection is neodymium iron boron (common says " rare earth " ) . The not stable material that because this is one kind is met in the liquid,corrodes quickly, pass plating nickel processing commonly so, and contact with the liquid that filtering to facilitate cleanness avoids, this kind of material is sealed in stainless steel canal. The magnetic field intensity of rare earth can achieve 12000 gauss (in stainless steel measure besides crust -- measure no point on plating nickel magnet directly, because magnetic body is not such) that use directly. The magnetic field of the magnet of common pottery and porcelain such as sound box of this kind of intensity comparing, latch, switch is strong 6 to 7 times. To choose systematic norms and dimension correctly, no matter be which kinds of system, must understand velocity of flow and pressure, anticipate contaminative grade and contaminative kind. Magnetism filters the liquid that can be used at all sorts of likelihoods to be put in iron qualitative grain. At present this kind of the commonnest application basically is aimed at cast-iron or steely, also can use at magnetism attraction nevertheless smaller and the material of more difficult adsorption, for example stainless steel and carbide. 300 the commonnest stainless steel in industry do not have magnetism generally, but can have after sclerosis paramagnetic, can divide from the filter in the liquid next. Wear away or cutting (abrade, milling) craft can cause sclerosis, because of this liquid medium scattered grain is contained likely paramagnetic, in enough can be given by filter below powerful magnetic force. The material with these magnetism lesser attraction needs to undertake filtering with inferior velocity of flow, so that have enough osculatory time,effective purify is polluted. System of modern high strenth magnetism has distinct advantage: Efficiency is tall -- filter of high strenth magnetism is OK filter is divided small to inferior the dinky grain of micron class. The engine oil in can improving a system / coolant quality, for spare parts quality, surface treatment brings positive effect, achieve the goal that reduces undesirable product finally. This has an advantage especially in high accuracy craft. Cleaner liquid still can prolong the service life of the machine tool significantly, because of,shorten thereby machine tool / machine annulus temperature exorbitant or those who destroy the shutdown time that cause and clean machine place to need is fixed shutdown time. The investment redound that uses magnetism to filter normally very rapid also. Round-the-clock movement -- contemporary magnetism filters the system can be deployed full automatic clean system, ensure the oldest rate shortens defend shutdown time. Economy -- magnetism filters use permanent magnetism core or permanent magnetism stick, need not change or deal with, replace cost and core of old pollution filter with core of time province filter deal with cost. The efficiency that filters as a result of magnetism gets promotion, engine oil / the clean efficiency of coolant also rises subsequently, engine oil changes frequency is reduced, still saved engine oil to change consequently cost and " old " pollute engine oil deal with cost. Environmental protection -- because magnetism filter does not need to use any using up sexual medium, because this won't arise,filter with medium the waste material that concern. In addition, engine oil is cleaner, and need not coolant, need not change often like once upon a time again. Nowadays, from the angle consideration of cost and company image, most contemporary company takes environmental protection seriously very much. The main drawback that magnetism filters depends on it cannot unless filter is magnetic grain. The contaminative proportion that in crossing these grain to process application in the metal, makes is very small. It is OK still that magnetism filters of tie-in other type filter use, ensure complete filter divides all sorts of pollution thereby. Sum up what be faced with as major workmanship to reduce cost and the pressure that increase yield to increase increasingly, use in workmanship filter appropriately the system can bring remarkable influence to work efficiency. Cost of the actor defect that filters because of this balance avery kind of, investment and its are right the improvement of craft degree becomes very important. CNC Milling CNC Machining