of ability of fan lamina v is discussed

5/100; (After 2) dish outside round place end jumps accident ≤ 4mm; (Round part way jumps outside 3) disc accident ≤ 3mm; (4) awl before dish outside round place end jumps accident ≤ 6mm; (After working face of mouth of 5) lamina is faced dish do not spend accident ≤ 1/100 straight; (6) classics is static, use balanced survey. 2 lamina strengthen what method reachs material to choose wearing away is a kind with posture is relevant outside material resemble now [Phenomenon] . Want to promote the birthday of impeller use, strengthen to applying outside blade without fail, let it can bear to wear away. Nextpage2.

1 wear away check of spot of cause elucidate author had worn away of blade outside affection , disentomb wear away the most austere position has become breach state (the part is ground wear) , a bit austere position already shape of wear thin blade, additional of the position outside wear together tiny groove. According to spot job element, judgement impeller is worn away by abrasive, erosive wear away, heat wears away wait for much re-act part of the day of shadow of pole of in order to. In the center, if be worn away by abrasive,weigh, already the granule such as imperceptible dust and coal ash, part of the day of shadow of pole of in order to is made fall in wind pressure, microscopical to applying outside the lamina that is on the move quickly cutting, caused blade wear away [1] . 2.

2 choose strengthen method to be told with respect to general situation , the idea that reinforces to applying outside workpiece has many kinds, the charcoal that be like ooze, brush plating to reach wait for spray of boy far away from home. To the applied labour of fan and spot element, solder of gush of only oxygen acetylene reachs the way that can make electric arc v. Trying pull on cent applied the photograph of solder of oxygen acetylene gush and electric arc v compares an experiment. Gush solder (be in harmony is weighed after spray) increase lukewarm rate graceful, increase lukewarm time (Time) is long, to make test specimen changes the current situation is grim, but mix rare rate is lower; And electric arc v increases lukewarm time (Time) is short, test specimen changes the existing state of affairs is very little, but mix rare rate is very high. Because the appearance of impeller reachs the cause such as stiffness, impeller changes the school after the current situation relatively pinch, together with is in the course of production creation impeller, impeller oneself has had certain creation accident, reason is reached to assure the size of impeller model this foundation requests accident, use changes the measure of electric arc v with very small current situation. 2.

3 choose material to get abrasive tatty work, choose a char tungsten commonly cast iron of tall perhaps chromic alloy regards v as material. But the method of v of use electric arc, can make char tungsten initiative granule is major (BuFen) melts, tungsten is contained in what intensity does not consider v layer analyse tall multiple oxide, affect the promotion of wearability; And cast iron of alloy of use Gao Ge regards v as material, can make v layer is containing Cr7C3 tall hard look, and its price is more favourable than char tungsten [2, 3] . The author divided to chose the v material that 3 companies make Tianjin of rose river, China, Harbin to apply compare an experiment, result, if express 1 show. Outside the intensity after expressing phase of 1 v data to make v of ground alloy system than experimental number Fe-Cr-BHRC@gt;50 of river of 1# rose accumulates affection Cr-Ni-SiHRC43 of Tianjin of tumor condition 2# carefully and nearly 3# Harbin Fe-Cr-BHRC@gt;50 carefully and nearly from the watch 1 can look , 1# material piles intensity is high outside solder hind, but quality of of joining together ability is poor, "" is shown to accumulate tumour record outside v layer not "" , smooth; It is to absolve in impeller application course, in "" the "" that accumulate tumour is in "" to hang grey "" , attaint impeller is moved balanced, reason is not used. After 2# material v, admittedly outside shape smoother, dan Jijiang is spent lower, because its wearability is poorer, reason also is not used. No matter 3# material shapes outside, or (HaiShi) outside intensity direction all first-rate, reason chooses his to be v material. of 3 v ability and result 3.

of ability of of 1 v ability is the important essential factor that affects v quality. According to the request to impeller, the park of ability centre of gravity v lamina next falling tone are thin the after rate and degressive solder changes the current situation these two direction. 3.

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The mix rare rate of layer of v of rare rate of 1 falling tone, frit of capable person of the mother in mirrorring v layer is compared into numerary hundred cent. Impeller mother capable person is Q235 commonly or 16Mn. Shift has to wear-resisting alloy material after mother capable person melts rare make part of the day of shadow of pole of in order to, can drop the intention that v layer alloy changes, influence wearability. In make sure the precondition of each other fusion issues mother capable person and wear-resisting alloy, leaving falling tone rare rate basically is degressive mother capable person melts quantity. In view of this, before formal v impeller, applied ability experiment. Coefficient of standard of use difference of author cent is right v of each groups of test specimen, compare later, each groups intensity is worth a result, , choose idealer [the ability standard of Perfection] . When the experiment, divide test specimen 6 groups, group tries 3 pieces pull, try pull size to be 6mm of × of 120mm × 50mm; Material and impeller are same, it is Q235; Wear-resisting alloyed powder piece size is 3mm of × of 90mm × 30mm; Use AX1-500 dc arc welding machine, use dc is being received (receiving relatively receive frit depth) instead; Make electrode with caliber 10mm carbon stick (electrode requirements is large, can reduce) of voltaic fine honey; Tailor-made lengthen solder (degressive charcoal arc is right the roast) of person. piece tries pull on v is able to bear or endure together grind alloyed powder piece, value of v layer intensity comes down on average to be worth record and narrate by group test specimen. Experimental result, if express 2 show. Express standard of 2 ability the joining together of U/V of voltage of I/A of electric current of group of influence test specimen to v layer intensity time (Time) intensity (30025 ～ of HRC)1280 ～ 15 ″ of 302 ′ 32025 ～ of 542300 ～ 50 ″ of 301 ′ 35025 ～ of 583330 ～ 30 ″ of 301 ′ 38025 ～ of 614360 ～ 301 ′ : The function of ability standard that uses form of the 3rd test specimen is best. Melt for degressive mother capable person quantity, should make v electric current decreases alertly, voltage drops, v rate is quickened; But v electric current is too small, can make be able to bear or endure adjust gold powdery piece melts not easily, to make v rate is decreased graceful. Be about to make v rate is quickened, need to increase v electric current. This contradiction [Philosophy] just can seek best combination through the experiment only. When Nextpage electric welder controls, need advertent below at 2 o'clock: (Degree of rock of 1) electric arc as far as possible small, with just exceeding powdery piece remote and advisable, but cannot bite an edge; (2) uses gradient to be the declivous solder of 10 ° of 5 ° ～ , make target of bath roam about as same as the target that apply solder. 3.

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2 palms accuse impeller to change the impeller after the current situation measures v, when test and verify not only need static, use balanced test, still need the size outside each, appearance and plea of positional satisfaction accident. Because v can make impeller is heated to all be not mixed, model into joining together stress, to make joining together changes the current situation, reason still needs to execute be in harmony to act when ability , just can change impeller current situation palm accuses to be inside tolerancepublic errand domain [4, 5] . Executed when v below ability acts: (1) assures joining together order in the v on one lamina is over after a powdery piece, flip through impeller, in position of proportional lamina correspondence, v is additional powdery piece. Such loops relapse, until end each lamina v. According to this order v, can make before impeller, hind dish all mix contractive, and can relieve thermal stress too assemble too, of degressive joining together changes the current situation. (2) hammer attacks of welding line impeller to change because v layer is in,the current situation is cold go producing fore-and-aft, transverse systole to cause in course. v is over one pink piece, with little weight tat, extend v layer, can recoup a part (BuFen) contractive quantity, degressive changes the current situation. (The sources of energy of 3) degressive line reduces line the sources of energy to be able to let the heat that blade gets be defeated to decrease successively into the quantity, thermal stress decrescent. This and the request that leave falling tone rare rate are same. 3.

2 results use above ability to act, to impeller applying v. Detect after solder examination, impeller changes current situation quantity is inside skill request domain, use portable strength plan to applying examination of layer of each lamina v, measure so that each nod HRC@gt;56. The power plant moves clarify, the movement of fan lamina age after v promotes 4 times fluctuation, absolved impeller to be inside an overhaul period of the top of a kitchen range, change because of blade wears away and be being caused or repair protect, assured the regular job of aircrew, got action of good drop finance and economics and social action. Fact of 4 conclusion classics is made examine, cogent Feasible can make this v technical ability, can promote the application of fan lamina birthday use greatly, this skill is applicable bearing abrasive tatty additional workpiece. CNC Milling CNC Machining