1、附录 专业英语翻译 Study of Dry Thin Wall Cylinder Liner forDiesel Enginecylinder Block Bore andCylinder Bore MachiningFirst chapter outline1.1 air cylinders attritionJudges the engine whether needs the overhaul, mainly is decided by the air cylinder wearing capacity, the air cylinder air ram group attrition
2、 hasHas the grinding compound to wear, the molecular machinery wears, corrodes the characteristic which - the machinery wears. In air cylinder working condition bad:Temperature high, pressure high, if oil feed insufficiency or lubrication condition bad, is easy to form the boundary friction, causesD
3、o not select has the metallic contact, forms the adherency. The hot adherency repairs a vehicle the initial period operational phase in new Che Heda to be easy to produce.In order to resist the hot adherency, must enhance the components the manufacture and the assembly quality and the lubricating oi
4、l quality.The cylinder body if coordinates the piston curl, in the attrition question is an inalienable whole, two has denseCuts relation. Generally besides special material, in two kind of mutual compounding ingredients one kind, if wearing capacity smallSpeech, then another kind of material wearin
5、g capacity also reduces along with it.Time the engine cylinder body manufacture precision and the assembly shape position common difference is remarkable to the cylinder wall attrition influence. In The manufacture and the overhaul are the strict control and the inspection air cylinder and the main
6、axle altar hole spool thread verticality, the air cylinder hole to the main bearingHole site, has the great significance to the engine service life. The cylinder wall attrition experiment proved that, When verticality errorIncreases to above 0.10mm when by 0.05mm, the cylinder wall wears correspondi
7、ngly increases 30-40%; Cylinder hole column errorAchieved when 0.04 mm, after exercises 20,000 kilometers, a cylinder hole column error increases to 0.10mm-0.12 mm.When an initial column error is smaller than 0.025 mm, after moves 20,000 kilometers, a cylinder hole column error only increases0.05 mm
8、 -0.06 mm.1. 2 cylinder walls surfaces appearanceThe cylinder wall forms the overlapping shape groove by to improve rubs the vice- lubrication condition is reduces the attrition the important link. EvenGoes against the net grain honing to be possible to cause the cylinder wall surface to present the
9、 clearly discernible overlapping net grain trench, and groove crest honingHas the microscopic plane, causes the flat topping area to account for the total area about 60%, like this may enhance the cylinder wall the oil storage ability,Causes the cylinder wall the wearing capacity to compare the non-
10、 flat topping network grain honing the cylinder tube to reduce about 78%. The use indicated that, carries on the flat topThe net grain honing, after the engine exercises 100,000 kilometers, still obviously net grain trench.The cylinder wall processing quality to its attrition influence remarkable, t
11、he rough surface is easy to destroy the lubricant film continuity;Is not easy in the smooth surface to preserve the lubricating oil. Under the certain working condition, the air cylinder wearing capacity if is roughHas the certain relations, therefore must reasonably choose the surface roughness. Th
12、e material indicated, for prevented pulls the cylinder, by all means mustThe maintenance lubricant film, the cylinder wall and the piston curl surface roughness must fully control. The Japanese material believed, cylinder wall surfaceRoughness take 0.3 mu m as suitable, its superficial honing trace
13、should form the oil storage surface. The French material believed,Regarding the linear precision work, should use 0.5-1.25 mu m the roughness. Regarding industry in application model cast iron,The cylinder wall surface do not have too to be smooth, otherwise can hinder to wear in; But the too rough
14、surface can cause the attrition increase.Therefore usually takes between 0.5-1.0 mu m, after wears in, surface roughness between 0.12-0.15 mu m.The modern motor car engine takes in the cylinder tube extremely in the enhancement wear-resisting life aspect the grinding compound attrition. Experimental
15、 tableBright, the cylinder wall total wearing capacity one about the half is the grinding compound wears to. Eliminates enhances the engine the filtration system functionOutside, in the assembly line ships out the engine usually has the massive grinding compound granule, is wearing in the initial pe
16、riod, causes the attritionSharp growth. The material indicated that, the engine installs to the automobile on, at first in 100-200 kilometer travelling schedule, in lubricating oilContains the silicon quantity to be most. Therefore does well the engine 清洁度, to guarantees the engine quality, the reli
17、ability all has the significanceSignificance.1.3 cylinder bodies distortionsThe cylinder body possibly appears various distortion in the use, brings extremely badly to the engine service lifeInfluence. The cylinder body distorts the reason usually has three: Namely internal stress, outside load and
18、temperature. Was mad the cylinder body has been makingIn the regulation Shang Neng guaranteed the correct position and the shape between the mating surface. But passes through period of time after making on the productionDoes not conform to the specification to distort greatly, its main reason is be
19、cause has not carried on effective actual effect processing to the castingOr the actual effect processes is improper. In addition, is mad the cylinder body after the rough machining force cutting, also can have the processing internal stress,Also must in carry on a time of actual effect processing,
20、otherwise will be able to have the distortion in the later use process. In recent years inIn the overseas research components distortion mechanism literature proposed some views, namely thought has the distortion intrinsic reasonIs the material crystallization flaw, like vacancy, dislocation, along
21、crystal grain flaw, hole and other sundry goods and so on. EspeciallyMaybe the dislocation and its the proliferation are the main reason which the influence distorts.1. 4 air cylinders and piston tolerance clearancesThe air cylinder and the piston tolerance clearance with importantly affects to the
22、engine service life, it is the design, the manufactureWith uses one of engine important parameters. Believed generally that, the assembly initial gap gathers the running in gap to be smaller,Coordinates the vice- life to be longer. The small initial gap only then through the enhancement processing p
23、recision, reduces the shape position common difference,The improvement piston structure and the material can achieve. Gap excessively small, is not easy to guarantee the lubricant film, increased the attrition, evenPulls the cylinder. Gap oversized, the engine explosion pressure drops, the piston pi
24、ne spacious, lateral swings enlarges, is easy to cause knocksCylinder. At present, the scientific research department develops has the true lubrication the tube surface piston, causes to rub the vice- tolerance clearance to be possibleReduces to 0.02mm below, this gap and the initial tolerance clear
25、ance are 0.08 friction vice- compares, may enhance sendsThe motive course 20,000 kilometers, this to enhances the engine the life to have the great significance.The second chapter cylinder hole, stops the mouth and the cylinder jacket hole processingAffects the engine service life in view of above e
26、ach kind of question, on the craft, the equipment we must performProcessing, can guarantee the engine the reliability. Under the main discussion is mad the cylinder body the question.Second chapter outline2.1 thin walls cylinder liners diesel engineOur company produces the diesel engine is a dry typ
27、e thin wall set of organism, its processing including the cylinder hole processing, stops mouth CanadaLabor, cylinder jacket hole processing, therefore we must all strictly control to the semifinished materials and each processing working procedure, can guaranteeFinal end product quality. The thin w
28、all cylinder jacket is the contemporary engine development tendency. It in does not change the engine cylinder holeThe center distance, does not increase the engine weight under the condition, enhances the engine power 10% 20%. Usually, according toThe material quality is different, the thin wall cy
29、linder jacket divides into the cast iron thin wall cylinder jacket and the steel thin wall cylinder jacket two kinds. Cast iron thin wall cylinder jacketed wallThick 2 3mm, may quenches through the improvement material quality and the laser enhances the resistance to wear. Steel thin wall cylinder j
30、acket wall thickness 1 What 1.5mm, is most commonly used at present is 20 low-carbon steel. 20 low-carbon steel are not wear-resisting, in order to enhance the resistance to wear,Must cover the loose hole chrome-plating level in the low-carbon steel substrate, therefore is called it the steel thin w
31、all chrome-plating cylinder jacket.At present, uses the improvement material quality, laser quenching, the chrome-plating, the enhancement processing precision, reduces the surface roughnessThe traditional method improved the cylinder jacket performance already to approach the limit. Therefore, the
32、thin wall cylinder jacket active face mustThe production oil storage structure, by stores up the lubricating oil, guarantees the cylinder jacket and the piston motion vice- life.2.1.1 water jackets cores group coreThe water jacket core group core localization must be accurate, the relative machining
33、 localization datum error must be smaller than 1mm.Otherwise after processes completes wall thickness uneven (like chart 2.1), various spots processing stress phase difference is big, cylinder Kong Yifa causes troubleShape; The diesel engine works when can have the radiation to be uneven, causes the
34、 cylinder hole not to be round, even produces pulls the cylinder breakdown.2.2.2 flees Shui QiangMust guarantee between various cylinders hole flees the water cavity (chart 2.2), enable organism to have enough flees the water ability. Like thisThe engine work is the entire cylinder hole can cool eve
35、nly, otherwise can cause the cylinder hole to have the partial heat, causes to pull the cylinderAnd so on significant breakdown.2.2.3 semifinished materials aging treatments of metalWhen semifinished materials aging treatment of metal an extremely important link. May use the heat ageing or the vibra
36、tion effectiveness for a period of time, in large quantities ofIn the quantity production situation, the vibration effectiveness for a period of time is a first choice.2.2.4 groups of cores requestsWhen casting the group core must , the cooling temperature drop be even, by reduces the blowhole, the
37、trachoma, the sand inclusion, shrinksCasting defect and so on pine production. This not only affects the casting the waste product rate, if appears in machine adds with the assembly in notPossibly discovered the flaw (slightly shrinks pine, sand inclusion, checking and so on), but can have the probl
38、em in the use operating mode, will be straightMeets causes cylinder Kong Louhuo to appear cylinder Kong Lie and so on the significant breakdown.2.3 machining skills reasonable arrangement:Thick boring cylinder holeFinished boring cylinder holeMachine adds the effectiveness for a period of timeHalf f
39、inished boring cylinder holeFinished boring cylinder holeDelimits stops the mouthHoning cylinder jacket holeFinished boring cylinder jacket holePresses the cylinder jacketClean cylinder holeHoning cylinder hole2.3.1 thick borings cylinders holeOrganism processing uses two sells locates at the same t
40、ime, after the locating surface and the cotter hole processing completes, first carries on the cylinder holeThick boring working procedure processing. But the cylinder hole following processing must arrange at the precision work section, after the three axle hole completes. Like thisMay fully releas
41、e in this period of time because of the thermal load which the thick boring process load but produces greatly. The thick boring process load unilateral shouldIn 5mm, then carries on the finished boring working procedure, the process load unilateral control in 2mm, if has the conditionShould better c
42、arry on cooling in the processing, like this both may save the cutting tool and to be possible to reduce the equipment attrition. At the same time must controlCylinder hole position in phi 0.5, after may cause the foreword processing like this to save many nonessential troubles. By nowRoughness is n
43、ot main.2.3.2 cylinders Kong Yuzhi mouthThrough series Kong Xi, the chambering and the hot clean, organism passed through the enough actual effect (mainly is inspiresAfter moves), carries on gathers the tile, the three axle hole precision work. Afterwards is the cylinder screen and the cylinder hole
44、 precision work. Because of thisThe spot datum is the main axle hole. Between the cylinder jacket is extremely strict to cylinder Kong Yuzhi mouth shape position common difference request, thereforeI thought cylinder Kong Jizhi the mouth best processing completes: Both may guarantee the proper align
45、ment the request, and solved has stopped the mouthThe end surface beats the question to the cylinder hole. This request has a special plane or carries on the processing from the generatrix, causes cylinder hole CanadaThe labor cutting tool and stops at the same time the mouth processing cutting tool
46、 to install on a cutter bar, completes the cylinder while a processing circulationKong Jizhi mouth final size. Our company BX020 boring processing from the generatrix is this kind of function engine bed, underIs to in this kind of processing way practical application question analysis and the soluti
47、on.2.3.2.1 scenes synopsesOur company is the home production vehicle uses the diesel engine the main factory, organism is the diesel engine important part. ItsThe processing is extremely complex, how but cylinder Kong Jizhi did the mouth precision guarantee is the difficulty.Slippery wrapHeadstockSt
48、ops the mouth processing localization ironButterfly shaped springBelt wind holeChe Zhikou knife holderOrganism cylinder holeOrganism stops the mouthCutter barFine (pulls) the boring knife holderPushes the boring knife holderChart 2.4 work clothes and processing schematic drawingsProcessing schematic drawingLike the chart shows, the work piece material is the cast alloy iron, the boring processing stops mouth deep b the common difference is b+0.04,0Aperture phi D -0.06Roughness R a 1.6, stops the mouth end surface to beat 0.025mm to the cylinder hole center. Because of this equi
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