Control product cleanness spends index

This Article Describes How We Can Improve Cleanliness Index From Two Aspects.

Meanwhile, it Also Reminds Professionals The Fact That Different Art Methods Have Different Problems In Product Cleanliness.

Thus, there Is A Need To Squarely Face These Problems And Solve Them.

Did not get for a long time enough attention quality index product is stuck to go up in fashioning a process those are ab extra or generate by process place, not only oneself does not need, and can regular to its behind job, dependability and the harmful material that life generation affects, be called normally contaminant. Cleanness spends the quality index that has long history as is one uses measure of control product contaminant (basically be solid grain weight) quality character is worth, undertake assess through normative experiment method. In the industry such as machine of the car that produces in those batch, bearing, internal-combustion engine, project, every is important in the product line of component, set the process that Jie aids efficient and special device to undertake cleaning exercise commonly, in order to ensure the cleanness of the product is spent. Graph the 1 hydraulic pressure that causes abnormal knocking holds out column and plain bearing liner in addition, a lot of enterprises still built professional cleanness to spend lab, give through normative method and affirmatory index test and verify. But even if such, come for years, the industry spends this quality index to still take seriously not quite to cleanness, be in besides report in industry technology program on the investment to rinsing equipment, still can spend test equipment and onefold and constant assess target to see from the pallet cleanness with those old continuance, especially after a bit. In fact, this respect supplements each other, be worth because of this quality character by a lot of more applicable year, won't consider to promote the standard of hardware of course. However, follow the change of people quality concept, quality awareness in recent years, be opposite especially car kind the security of the product, dependability, and the higher demand to its environmental protection and energy-saving respect, make link of a few craft that often are ignored in former days, quality got huge takes seriously, "Cleanness is spent " it is namely. The causes consequently formerly trouble that spends because of cleanness in fact, blemish goes to also have, just pay close attention to degree insufficient, wait for dynamical assembly component like water pump, lubricating oil pump, engine, transmission especially, pass the following and typical example, you have the value that spends to product cleanness further understanding. This example has the drawback of respect of car engine abnormal knocking, and those who accompany consumer ego to protect consciousness is ceaseless strengthen, and the field acceptance of the enterprise and to product liability heart strengthen ceaselessly, even if such blemish also needs to be treated with very serious manner. Undertake to engine through professional analytic, card causes before discovery one to death, cause rocker to cannot be raised, clearance appears between the gyro wheel that causes rocker to go up and cam, at be give out the abnormal knocking like knock when camshaft is rotational. A parts card is to death it is normal to mix component that graph 1a place shows. The 2nd analytic result makes clear, the abnormal knocking of engine is go up by what neck of main shaft of Wu Yuqu axis cooperates, next two spool mixed solid grain shape in tile sundry, pull hair already surface of plain bearing liner (1b seeing a picture) , caused abnormal knocking again. And disassemble further, the analysis also makes clear, the card that before one hydraulic pressure holds out column also is actually to death by Wu Xi little aluminous bits grain is jumbly cooperating face clearance to cause. And get to the bottom of sth traces to the source, all these, it is there still is what be deficient in and cause on the control that spends because of the cleanness of assembly or component, the importance this shows that product cleanness spends one spot. The promotion that cleanness spends index and carry out by before narrates cleanness spends a meaning knowable, the ration that character of this one quality is worth is stated is the foreign matter that takes with product place necessarily, namely the quantity of hangover is relevant. In fact, a lot of years since, cleanness is spent also is the weight with hangover really (it is unit of measurement with Mg) those who regard assess as index, and impurity of paper of filter be been in by the remain of metage basically is given priority to with solid grain content again. To at the monitoring to grain content size, reach stop before this century 10 years metaphase, just mention in the standard that implementing domestic and internationally " when having a demand, the dimension that answers grain and sort have a test, but first choice deposit is in hangover of paper of filter of 100 μ M " . Apparent, the foreign matter size here is point to the biggest grain, use common optical microscope to be finished through means of artificial range estimation commonly, but this kind of state is in produced very big change in recent years. Graph 2 advanced cleanness spend test equipment cleanness to spend what index control is worth to rise undeniable, the quality that workpiece is cleaning after hangover (Mg) remain a main assess index, but in recent years its control a value to already had rise apparently, with some the main part of the engine of the small car that discharge an amount of well-known trademark series is exemple, the target that its basically contain lid of a cylinder body, crock, crankshaft, camshaft and connecting rod already compressed 40%-100% nearly 5 years, this is what taste quality to producing with enterprise oneself is exacting, and the development of engine product technology is close together and relevant. On the other hand, for detersive the result that spends experiment after to obtain can the case that bona fide report gives a product, at the same time also for the enterprise mutual between the test is provided more as a result can compare a gender, the first when work in the experiment, also be most the equipment tone that in cleaning working procedure together, adopts of the foundation also is rising, graph 2 it is a kind of representative equipment. See from inside the graph, of this machine clean an area to be one sealed area, nonexistent tradition " open cistern type " the lotion that operates generation splatters and even often drop the case that rinses pressure. This equipment still heads unit of an automatic second birth, not only ensured costly clear lotion lasts, reliable ground is used repeatedly, and in assure its character while more environmental protection. When because undertaking cleanness,also spending an experiment, assure effectively 2.

5~3.

Of 0bar rinse the parameter such as pressure, make test result more authentic. Cleanness spends index increase with the index that spends at reflective product cleanness, the photograph is older come onefold " hangover quality (Mg) " increased again nowadays multinomial, spend to the cleanness of the product thereby raised more strict requirement. Graph in hangover of · of analysis of sex of physics of 3 hangover grain the largest particle size. It is only before this one index " option " , but already became nowadays surely check project, the key was to establish corresponding standard, had the basis of differentiate thereby. And detect accordingly method, have at present a variety of, besides traditional optical microscope, also have the stereomicroscope when using metallographic to analyse, or what behind will speak of is more advanced " cleanness spends analytic system " . The physics of · hangover is characteristic. Ceng Di arrives in front, the main body of hangover is solid metal grain, they are the biggest to the influence of the product. But in fact always still can some of metalloid odd-come-short exists, if content of smeary, fiber is waited a moment. The part is famous industry group still set to this " length of the biggest fiber " this one index. But company of production of engine of great part mainstream or the harm that pay close attention to metallic grain more, made principle of the following differentiate: Aluminium cannot be contained to make grain in hangover. And differentiated fashion is simpler, use puissant magnet to be close to already carbonadoed male content of rudimental solid grain can. Graph 3 use namely advanced " cleanness spends analytic system " the analytic result of the hangover to a sample, graph 3 pairs 3 kinds among them: In metallic grain, metalloid impurity and fiber " the biggest " and " second big " offerred form, mensurable description. Diameter of bead of grain of the solid in · workpiece hangover (size) statistical analysis, what statistical analysis points to is trial work cleans the impurity of after to press grain bead diameter to be in the distributinging circumstance of different interval. For example, the assess form that is a kind of model below (see a table 1) , rating can be installed according to actual condition, the watch is a give typical examples 1. This index in expressing the exemple on give typical examples of distributinging monitoring of statistic of 1 particle size is divided into AA, A and B3 level, but usually the enterprise often installs only " eligible " doorsill. Additional, it is OK to be returned below some circumstances every " bead diameter interval " set is different " the coefficient that increase advantageous position " , with more cater to by the circumstance of check product. Each enterprises can design the test report form that satisfies oneself demand to have corresponding feature again already accordingly. Of course, undertake by further requirement statistic is analysed, still but if scale pursues 4 in that way change trends pursue, the abscissa in the graph is time. Nextpage closes Wu You to taste cleanness to spend an analysis to the car 0 assembly will tell, regard the job as the engine oil of medium, will strictly tell also is his important " package " one of, likewise cleanness spends a question. In fact, it is early at the beginning of this century the level that already had a standard (wait like ISO4406, ISO4407) the cleanness that made clear fluid medium spends a requirement, not only show palpability checks a method, and the statistical analysis afore-mentioned hangover grain size is evaluation index certainly. In last few years, many assembly plants are in when implementing this one standard, promoted hardware gradually, detect the class of equipment, from can the optical microscope with common have the aid of, the high strenth of fix eyes on, inefficient work artificially, the cleanness that develops to if the graph is shown 5 times,be used spends analytic system. This kind of advanced instrument is the testing system that integrates through smooth Electromechanical, scan quickly to all and residual grain of surface of clean after filter paper automatically, be opposite at the same time particle size and the classified interval that press a regulation undertake metrical mixing statistic, most after is worth by the doorsill of set or different grade is opposite this one cleanness of workpiece spends index to make judgement. Apparent this kind of instrument can taste cleanness to spend an analysis with Wu You not only, still narrate the test of this one index of workpiece with Wuqian likewise. Need points out is, although oil tastes an analysis to be reached in many component factories,include the assembly plant such as transmission to already was carried out somewhat in recent years, be in nevertheless in be being made as car cardiac engine, the cleanness of the engine oil that uses to its spends an analysis to just begin. This also expresses palpability to detect to this the acknowledge of project and index and take seriously. Graph the statistical curve that grain of μ M of 4 diameter 50~100 counts (give typical examples) the complexity that control product cleanness spends is beyond question, the cleanness the product spends control to be in the manufacturing process that the foundation in rated limits is a product. Although almost all more important, the product line that cleanness spends index to ask was installed clean industry, and the function of cleaning machine, efficiency also is in by the effort at mill business rise ceaselessly, but the cleanness that the fact is control good product is spent or have the complexity that comparative. Does the reason where? The technique that still basically produces a course by dominant decides. The crankshaft of typical spare parts in the engine that in front content mentions is exemple, to its cleanness spends what quality index asks to rise is a very difficult process. Practice makes clear, the payoff that cleanness of a finished product spends a level is not merely absolutely most after cleans working procedure to have together it " wash male clean " so simple, it will be the comprehensive report of whole process. And should reflect technical progress already more very much, want to consider the measure of economy, production cost again, often meeting and this one " target desire " be contrary to. Still be with crankshaft exemple, afore-mentioned complexity are reflected in a lot of respect. The plan is residual and the impurity that a kind of 5 advanced cleanness spends hangover to analyse cleanness of instrument crankshaft classics to spend experiment after to arise, main out 3 place: The semifinished product face that is not treatment face, sector board; Oily aperture; The treatment face such as journal. And among them influencing factor is numerous. Semifinished product cast is much in crankshaft semifinished product at forging, it is especially in the medium, little engine that discharge an amount, and the foundry technology that uses in home with " sand mold " the method is given priority to, use lesser " housing " . Although latter is formed the person that workpiece surface condition wants good Wu Qian apparently, but because of " one-time " housing process cost is high, reason industry trend is cast at choice sand mold. Of course, still can increase a to improve quality of semifinished product face " gush bolus is sclerotic " working procedure, but this can raise production cost again. Practice makes clear, although was installed in product line,clean industry, but the workmanship of semifinished product and formation workpiece surface mass, still have bigger effect to be being spent at the final cleanness of crankshaft. Be in abroad manufacturer of a few famous cars, the cleanness of semifinished product set that already was crucial workpiece spends control worth, if crankshaft semifinished product is 50mg (the quality of hangover) , and can by on the home is being adjusted appropriately when necessary, but the meeting when rising is carried out to encounter some of difficulty in home. Nevertheless, must point out is make in aluminium situation of semifinished product manufacturer is completely different, need square (user) can make to crucial aluminium semifinished product makes clear cleanness spend doorsill worth, basically be those involve the work that has athletic part, carapace of the lid that be like a crock, water pump, lubricating oil pump. Some cleanness spends index to return the weight that is hangover not merely, resemble this kind covering semifinished product to the crock crucial a requirement that still put forward to be analysed to granularity further. To this, even if domestic semifinished product also can be carried out stoutly for goods factory. Bore, since treatment of crankshaft oily aperture is long-term, the bore technology that treatment of oily aperture of domestic and international crankshaft adopts all is " the gun is gotten " , but in recent years deep aperture of progressively already instead is gotten (like twist drill of hard alloy straight power) . Will tell from the many sided such as production cost and work efficiency, new technology is more sound, accordingly from this century first, use in newly-built product line " the gun is gotten " the scale of craft already decreased apparently, this kind of circumstance measures motor product line in medium, small blame very. But from will tell on the other hand, go by Wu Zhi what adopt when new technology is minim lubricates, get the with 800bar pressure high pressure cutting side the treatment side craft than the gun oil is rinsed, the means that uses latter undoubtedly is right the effect of the cutting etc hangover of cleared bore after than many former and ambitious. The refrigeration since the influence cutting fluid of element of fluid of the cutting in grinding process, lubricant, clean a platoon to cut, antirust wait for main effect, have very great help to machining the on the rails of the process. Manufacturing practice admonishs people, machine a component of the system as whole cutting, cutting fluid must produce corresponding effect through choose correctly and using talent. It is with grinding exemple, ever was in automobile industry axis kind what use extensively is corundum in spare parts treatment kind emery wheel, what follow the demand such as pair of production quality and manufacturing efficiency in recent years is ceaseless rise, in the grinding craft of journal of such as crankshaft, the scale that chooses CBN emery wheel is rising ceaselessly, by had at right now rotate speed, bear rise apparently, the cutting fluid that chooses accordingly also must from before " fluid of water radical cutting " instead " fluid of oil radical cutting " . Although latter is right the workpiece that be added also has clean the effect certainly, when should adopting high pressure to furnish especially, it is better that its clean function, but the water that compares oiliness surface activator base cutting fluid, both still have bigger difference. Exterior activator on one hand can adsorptive all sorts of solid are atomic (pink of cutting, iron, grinding) wait for hangover with greasy filth, form an adsorptive film in workpiece surface, prevent particle and greasy filth conglutinate to be in workpiece, emery wheel (cutting tool) on, on the other hand can infiltration is mixed to particle smeary on sticking interface, they and interfacial depart, take away along with cutting fluid, rise to clean action thereby. Graph the 6 principle signal that are this one process. Apparent, changing the after of grinding means and cutting fluid, although can promote the treatment of crankshaft effectively quality and productivity, and use liquid of oil radical cutting more advantageous also at workpiece antirust, but photograph comparing is chosen " water radical " , clean a cut result to be able to be reduced somewhat, this also is a fact that does not dispute. When because how is this having technology,program, craft is adjusted, the influence that spends to may causing workpiece cleanness gives proper attention, still be necessary occasionally. Graph of 6 surfaces activator clean, decontamination action Guan Wuqing washs labour the setting cleans industry mediumly in product line ask to have huge effect to ensuring the product accords with cleanness to spend, but branch of this same need craft decides via considering after integratedly. In recent years the following 2 tendency are worth to pay close attention to: · cancels among clean industry, set product line terminal only that one. It is with crankshaft line exemple, past part enterprise can be in rough machining (include " bore " working procedure) , the after of heat treatment establishs a among " clean " , but means of this kind of technological arrangement is very scarce already in recent years. This also is of course with real need and go out to consider to concern at socioeconomic. The clear lotion that · cleaning machine chooses. With cutting fluid likeness, clear lotion also has oil radical is mixed the cent of water radical, long-term since, the clear lotion of water radical held great share, nevertheless this one state also is being changed somewhat in recent years. In crankshaft line terminal clean working procedure, the factory selected more and more car engine " oil radical " clear lotion, especially those use CBN emery wheel in grinding working procedure, chose the company of cutting oil. Without doubt, be chosen as treatment like using cutting oil, if pass oil radical to clean fluid to undertake,clean a process, bring very great help to the antirust meeting of workpiece. However, also be like same power Shuang Renjian, in light of the effect that cleans, be inferior to the clear lotion of water radical for certain, its immanent cause and in front the purify action mechanism that elaborate is identical. The place on put together is narrated, can see the importance that control product cleanness spends and complexity clearly, fact truly such, deciding those who spend a level the product is final and clean is to clean working procedure anything but, or it is the experiment method that cleanness spends a lab / program, it is the result that collaboration of whole process put together uses. Accordingly once produce the problem of this respect, when perhaps be faced with a requirement to promote the index doorsill that cleanness spends the value, also must item-by-item, chase the ground integration analysis. Crankshaft regards engine as assembly in one comes close, although be each case only,its cleanness is spent, but the element that involves square respect area, also but amplify arrives other product. Additional, different company asks to go up objectively to the quality of the product or have certain difference, a few index that the article mentions are to be in apparently at higher level, because this is in the article,the seriousness of a few issues that can reach experience, complexity promotes higher rate, but the author also believes, no matter the importance that product cleanness spends puts much higher position to had been not been. CNC Milling CNC Machining