With average grinding machine treatment exceeds part of precision, low surface roughness

02--0.

H4 of 04 μ M, precision- - when the journal of H5, it is undertake on expensive high accuracy grinding machine. But factory of build and repair of average project machine does not have high accuracy grinder however, want grinding to give such low surface surface roughness, so tall journal precision is very difficult. We have a large number of tests on common cylindrical grinder of existing equipment M131W, undertake detecting necessarily to its, blow grind and adjust, pass nap and careful balance emery wheel, grinding bead to go up appropriate whole more waiting for Gao Wei blade, grind with respect to what can realize freeboard precision, low surface roughness completely annul, effectively grinding gives precision H4- - H6, surface roughness Ra0.

02--0.

The spare parts of 04 μ M. This way is simple, go to the lavatory to go easily, the effect quite beautiful. 2 exceed mechanism of grinding of essence of life to exceed grinding of essence of life is it is OK to rely on emery wheel working face to go up nap gives a large number of waiting for that grind a small blade high this one character and be able to undertake. The tall small blade such as these can be excised from labour tabulation face scanty, still have blemish of a few minim and minim appearance and on size error and surplus. Accordingly, using the small cutting tool such as these is many, if grinding dosage is proper, leave many extremely imperceptible cutting mark likely on treatment face, so attainable very low surface surface roughness. In addition, because be in,still spend light to grind level without blaze, still have very bright the friction that come, slippery crowded, polish and control the function such as light, reason makes the exterior surface roughness that machines secret to get is reduced further.

The overhaul of 3 pairs of average grinding machine to be on flexible grinder grinding gives surface roughness Ra0.

02--0.

The workpiece of 04 μ M, answer old flexible grinder to undertake the project detects as follows, do not accord with precision to ask, want to undertake blowing grinding overhauling. (1) overhaul bed slideway 1) detect and what kind blows slideway of form of lathe bed V: Inside perpendicular plane do not spend continuously, on 1m length, must not exceed 0.

01mm; Inside horizontal do not spend continuously, on 1m length, must not exceed 0.

01mm; With saddle of slideway not verticality, on 250mm length, must not exceed 0.

02mm; The contact orders a requirement 12- - at 14 o'clock (25 × 25) Mm. 2) detected what kind blows slideway of lathe bed plane: The imparity of V form slideway is spent, on 1m length, must not exceed 0.

02mm; Inside perpendicular plane do not spend continuously, on 1m length, the law must exceed 0.

01mm; Osculatory stain asks 12- - at 14 o'clock (25 × 25) Mm. (2) overhaul saddle slideway 1) detect and what kind blows saddle V form slideway; Inside perpendicular plane do not spend continuously, 0 must not exceed on entire length.

01mm; Osculatory stain asks 10- - at 12 o'clock (25 × 25) Mm. 2) detect and what kind blows slide saddle smooth slideway: The rough travel of V form slideway is spent, 0 must not exceed on entire length.

02/1000mm; Osculatory stain asks 10- - at 12 o'clock (25 × 25) Mm. (3) the clearance that adjusts grinding spindle and plain bearing liner turns in the Tu Se on diameter of grinding spindle axis and plain bearing liner grind, blow with drawknife grind watch of plain bearing liner contains a scale, osculatory stain should reach a point 12- - at 14 o'clock (25 × 25) Mm, after this undertakes installing adjustment, adjust the clearance of grinding spindle and plain bearing liner 0.

0025--0.

005mm. Such, can overcome in the malady that arris circle appears in the workpiece in grinding. (4) electric machinery of balance grinding spindle and emery wheel because the vibration of grinding spindle electric machinery is very big to the influence of workpiece surface surface roughness, so grinding spindle electric machinery needs to pass a balance, emery wheel should have a balance twice; With diamond pen nap emery wheel hind has thick balance, the emery wheel classics after reoccupy oilstone or thick car makes balance of essence of life after close nap. 4 essence, fine twice what kind whole emery wheel is the workpiece that makes grinding goes out to be able to achieve Ra0 of exterior surface roughness.

02--0.

04 μ M, use undermentioned the labour of two kinds of methods has essence of life, fine two nap emery wheel. (1) with Jin Gang slate pencil essence is repaired, the emery wheel after reoccupy fine vehicle is fine repair annulus, OK and contented surface is rough Ra0.

4--0.

The requirement of 8 μ M, want grinding to give Ra0.

02--0.

2 μ M is very difficult. But, after if use diamond pen energy,be being repaired, the emery wheel after reoccupy fine vehicle is fine long, can achieve this kind of requirement completely. Fine TL60#ZR1 can be used when repairing- - the emery wheel of ZR2, diametical φ 100mm is controlled. Get on emery wheel clamp in an arbor first, go up in accurate lathe again the circle outside fine vehicle, slant in order to eliminate place. Fine Xiu Sha undertakes in grinder later annulus, grind arenaceous office with emery wheel essence namely annulus. Head wearing relies on to bringing roll when nap emery wheel, its rotate speed wants low, classics trade department is 80- - 100r/min, want when feed small, move back and forth is via trade department 0.

002mm, workbench reciprocate speed under 0.

3m/min, need classics for many times move back and forth is appropriate whole. Nap emery wheel and by direction of rotation of nap emery wheel identical, namely the linear velocity way that both contact chooses is opposite. Cooling fluid wants sufficient, so that develop floating arenaceous bead, there is surplus in avoiding grinding process surface of the arenaceous workpiece that pull hair. Emery wheel is course essence, fine after two nap, in emery wheel grind bead to go up but nap gives more waiting for Gao Wei blade, after emery wheel nap ends, reused wool brush away is dropped by the arenaceous bead of surface of nap emery wheel. Before grinding, want to undertake filtering strictly to cooling fluid. When grinding, cooling fluid wants sufficient, avoid burn workpiece appearance. (2) with Jin Gang slate pencil essence is repaired, reoccupy oilstone is fine long use keen odd grain diamond first pen essence is repaired, large emery wheel is ground can repair on bead piece more wait for Gao Wei blade, reoccupy oilstone (or arenaceous) undertake fine long, on the base that builds in essence of life namely, the nap on bead is ground to give more waiting for in emery wheel tall small blade. When be being repaired with diamond pen essence, emery wheel nap implement installation wants correct (graph 2) . But feed must not is more than every time 0.

005mm, fore-and-aft feed suggests to be worth with lowest. In process of nap emery wheel, want to notice to hear voice, it is in order to hear even froufrou optimal. If hear ignore tall ignore low, gradually tall gradually when the low, abnormal noise that gives out toot toot even, should check workbench to whether crawl, cooling fluid is abundant, diamond pen is sharp. After be being repaired through diamond pen essence, reoccupy oilstone undertakes fine long. Oilstone should use emery wheel to grind on luckily grinder smooth. Fine when repairing, oilstone must as circumferential as emery wheel surface is equal, slight contact, adagio fore-and-aft and mobile 2-3 second can. After passing essence of life, fine nap, usable hand points to the direction of rotation down emery wheel, near surface of emery wheel job gently, make fore-and-aft shift, if the contact feels like lens face,feel glossily right now can; When be like the feeling that has hand of the thorn that wear bead, usable cut go the paintbrush that 2/3 brushs hair gently the float bits of surface of brush away emery wheel. When 5 grinding dosage undertakes exceeding precision grinding with M131W average grinding machine, assure to achieve Ra0 of exterior surface roughness effectively.

The experience grinding of 02 μ M is measured. M/min4 of working linear velocity- - the workbench when 10 grinding is fore-and-aft feed speed (Mm/min)50- - 100 grinding deepness (Mm)0.

0025--0.

When 005 grinding transverse feed frequency 1- - the grinding surplus on radius of 4-6 of frequency of stroke of the 2 workbench when be being ground without scintilla light (Mm)0.

003--0.

006 accessible exterior surface roughness (μ M)Ra0.

02--0.

046 grinding note and the problem that appear possibly (the osculatory case that emery wheel and important document should note when 1) grinding contacts emery wheel when workpiece surface when, the successive sound that audibility whistle whistles, the emery wheel that the water mark of workpiece surface can be set is taken away, see faint scintilla at the same time, cooling fluid can be increased when elder brother, the saponification liquid that the chroma of cooling fluid uses than common grinding is tallish, but the requirement filters clean, undertake feed after that. Every time feed is every pairs of journeys 0.

005mm, grinding arrives finally, till do not have scintilla till. Right now handwheel of will transverse feed is pressed to feed direction, make emery wheel is seized to workpiece slightly, but do not make feed, be equal to pair of workpiece to undertake polishing namely, did not make sure workpiece surface surface roughness can amount to Ra0 so.

02 μ M. (2) prevent workpiece to expand when summertime grinding, machine tool floodlight has can approach work, come loose in order to prevent lamp artillery piece to heat causes workpiece to expand and affect grinding quality. (3) labour assorted surface pulls hair this is cooling fluid sordid or emery wheel surface has surplus arenaceous those who cause, should strict close filter cooling fluid or float arenaceous brush. (4) have local burn because cooling fluid is inadequate,this is, feed is too big, or emery wheel uses blunt be caused by. (5) workpiece surface is local moire treatment ends, workpiece surface majority is very good, but local have imperceptible ripple. This may be main shaft becomes loose, electric machinery vibration or other reason cause, require a basis particular case, adopt relevant measure to try to solve. CNC Milling CNC Machining