Fluid of rational application cutting ensures quality of aperture of bore with a reamer

The sodium carbonate of 75 ％ and 0.

25 ％ inferior sodium nitrate is made up and become, commonly used machine at grinding; Exterior active aqueous solution by 94.

The soap of the water of 5 ％ , 4 ％ and 1.

The anhydrous sodium carbonate of 5 ％ is made up and become, multi-purpose wait at mill of fine vehicle, essence and aperture of bore with a reamer. Emulsion is the mixture liquid of oil and water, differ according to oil and water compound scale, cent is common emulsion, extremely press emulsion and antirust emulsion. The emulsification oil of 5 ％ of 3 ％ ～ adds water dilute, can form low density emulsion, namely common emulsion. Common emulsion refrigeration and clean action stronger. Join in emulsification oil sulfur, phosphor, chloric wait for an organic compound, can form extremely press emulsification oil, raise lubricating film to be able to bear or endure the ability that gets temperature, pressure, use 20 ％ of 5 ％ ～ extremely press emulsification oil to add water dilute to form extremely press emulsion, extremely press emulsion lubricant action is stronger. Join on the foundation of common emulsion 0.

Of 1 ％ inferior the antirust additive such as 3 natrium, urea can form sodium nitrate, phosphoric acid antirust emulsion, basically have antirust, cooling effect. The bases of cutting oil is mineral oil, commonly usedly system of bad news of total loss of L-AN7, L-AN10, L-AN15, L-AN32, L-AN46 uses oil and light diesel fuel, kerosene to wait, minority uses animal oil or vegetable oil, wait like oil of soya-bean oil, rapeseed oil, cottonseed and castor oil, the quantity of heat of fluid of this kind of cutting is low, viscosity is big, fluidity is poor, lubricant effect is good, commonly used in the treatment such as honing. Different metallic stuff its are mechanical the otherness with function and technical properties constant presence, so when aperture of bore with a reamer, need fibrous root occupies the different function characteristic that machines an object, the choice uses appropriate cutting liquid. When bore with a reamer cuts medium carbon steel and alloy steel, because medium carbon steel and alloy steel have good cutting to machine function, add man-hour to won't produce many heat in metal cutting, cut bits changeful form breaks off, cutting tool wears away not easily, when choosing cutting fluid so, basically use give priority to in order to lubricate, refrigeration is complementary cutting fluid, reduce the goal of the exterior surface roughness of workpiece in order to achieve. When aperture of low speed bore with a reamer, appropriate chooses the vulcanization emulsion with big chroma; When middling speed bore with a reamer is cut, appropriate chooses the mixed liquor of sulfurized oil and kerosene, increase lubricity. When bore with a reamer cuts stainless steel, the thermal conductivity difference as a result of stainless steel material, cut bits to stick knife, cutting tool easily to wear away to wait for a characteristic quickly, choose cutting fluid to want in order to drop temperature, clean cut bits to give priority to. 3 ％ inferior the sodium carbonate that sodium nitrate adds 2 ％ mixes with a few hot water, add the system of bad news of L-AN46 total loss of 1 ％ with oil next 0.

The alcohol of 5 ％ adds up to the water dilute at surplus is being used after rising, the emulsification oily bore with a reamer that such become matching cuts stainless steel result very good. Bore with a reamer is cut cast-iron when, as a result of cast-iron in the existence of black lead has to matrix cut apart action, cast-iron intensity, plasticity and tenacity are very so poor, but hardness and brittleness are very big, and the surface has tiny flaw and pinhole, in treatment easy form collapse to break cut bits, do not need to cool, lubricant effect is not apparent also, accordingly, bore with a reamer is cast-iron Kong Shi, do not add cutting juice, be like can one aperture repeats bore with a reamer to be cut twice, the exterior surface roughness that can reduce workpiece is worth, make workpiece surface surface roughness is worth reduce Ra3.

2mm left and right sides. When bore with a reamer cuts brass, because be comprised by copper and zincic element brassily, the brass that uses commonly in industry contains zincic quantity not to exceed 45 ％ , reason its characteristic is plasticity good, intensity is high and cutting processability is good, need to try to lubricate when treatment the cutting fluid that action gives priority to, use the rape oil with older viscosity commonly. Bore with a reamer cuts unripe aluminium, namely when cast aluminium alloy, the plasticity difference as a result of this kind of alloy, intensity is low and brittleness is big, surface roughness of the surface when treatment is worth big, oil of the coal when bore with a reamer is cut or the miscella of 30 ％ kerosene and 70 ％ rape oil can reduce the exterior surface roughness of workpiece to be worth. The change of cutting fluid and aperture treatment quality 1.

The breed difference of the breed cutting fluid of cutting fluid affects the surface roughness that machines hole wall to be worth size directly. In actual production, the choice of cutting fluid is unreasonable, the surface roughness that often can create treatment aperture hole wall directly drops (see a picture 1) . Graph the choice of 1 cutting fluid is unreasonable the surface roughness that often can create treatment aperture hole wall directly drops in the Nextpage effective treatment in us, when aperture of bore with a reamer, if join the emulsion with high concentration, surface of workpiece hole wall is bright and clean the face that be like lens, exterior surface roughness is worth very small, ra can be achieved 0.

8 ～ 1.

6mm; If join system of total loss bad news to use oil, workpiece surface color sends black, exterior surface roughness is a bit poorer than using emulsion, ra value is commonly 1.

6mm left and right sides; Add aqueous solution, workpiece surface surface roughness is worth the biggest, ra value is commonly 3.

2mm left and right sides. Practice makes clear: Be worth when hole wall surface roughness when the demand is very low, should join when aperture of bore with a reamer extremely press emulsion to regard cutting as fluid; Exterior surface roughness is worth when the demand is bigger, multi-purpose aqueous solution regards cutting as fluid; If surface roughness requirement is general, system of bad news of optional total loss regards cutting as fluid with oil. 2.

The lubricant function stand or fall when the discretion of pH indicator of chroma cutting fluid of cutting fluid can affect treatment directly, so the chroma of cutting fluid is the parameter of a craft that attention needs in actual production, namely each treatment facilities needs set index of a chroma, choose the highest chroma demand inside system of supply of this cooling fluid to be worth namely, the cutting tool that can ensure the treatment labor situation with top demand so asks to satisfy, if machine the cutting fluid chroma of aluminium alloy to choose 10 ％ of 8 ％ ～ commonly (12 ％ of 10 ％ ～ ask for the chroma of special cutting tool) , and the chroma with cast-iron treatment chooses 5 ％ ～ commonly 7 ％ . 3.

Because the mental allowance of aperture of bore with a reamer is small,the cleanness of cutting fluid is spent, the chamfer holding bit of cutting tool itself is more shallow, of arbor inside cooling fluid hole is not large also, spend a requirement to the cleanness of cutting fluid consequently taller. In our production, device of similar aperture of two bore with a reamer, machine same content, one of these day, the quality of aperture of bore with a reamer of an equipment becomes suddenly very poor, appeared to play wool phenomenon, and two paragraphs of aperture that this aperture is intermediate available archives, still appeared to go up to leave small case greatly, and the quality of aperture of bore with a reamer of an equipment is very good still. We beat from treatment parameter, main shaft the respect searchs an account, did not find a problem. We consider finally whether related to cutting fluid, tried to increase cutting fluid concentration first then, rise by 8 ％ to 10 ％ , but the result is bad still, tried to change again later cutting fluid, undertake cleaning to the reactive filter of cutting fluid, after completing these works, try aperture of bore with a reamer, hole wall precision satisfies a requirement completely, the cleanness that shows cutting fluid spends precision of pair of aperture of bore with a reamer to have immediate effect. In actual production, the cleanness of cooling fluid spends the use of bad immediate still impact to cutting tool. Some more consistent inside the reamer with cooling fluid cooling aperture, because cooling fluid is dirty and jam inside the case of cooling fluid aperture is very much, once cooling fluid aperture jams, cut bits to often cannot be discharged normally quite, can appear to already machined hole wall to pull hair so, make workpiece discards as useless. Additional, cooling fluid is dirty still affect cutting tool and arbor, because cooling fluid is too dirty,the arbor of 2 is, cut bits to be stuck on arbor, make arbor torque rises and appear twist caustic, brought about finally arbor cannot be used normally quite and discard as useless, the invalidation that workpiece also must discard as useless is sequential. Graph 2 cooling fluid are too dirty cause arbor torque to rise and appear to twist caustic and discard as useless finally 4.

The temperature of cutting fluid is lubricant action is the contact that relies on cutting fluid to filter cutting tool and work very thin oily film is formed between the surface, reduce the attrition between cutting tool and workpiece cutting face thereby, reduce the conglutinate that cuts bits and cutting tool and the generation of the tumour that accumulate bits. Want to form oily film, cutting fluid must have certain viscosity, but temperature has the effect that cannot ignore to viscosity. Look all day long, as the change of indoor environment temperature, the temperature of cooling fluid can produce a few change, in the meantime, temperature still meets the cutting fluid inside equipment produce change because of the continuance of handling time, accordingly, the control of environmental temperature is helpful for machining the safeguard of quality, especially finish machining; Look all the year round, summer and the difference in temperature in the winter are bigger, emulsion of same pH indicator, summer viscosity decrescent, winter viscosity greatens, accordingly, when choosing emulsion, summer should choose viscosity bigger, should choose viscosity in the winter a bit small. Epilogue to improve the precision of the efficiency of aperture of bore with a reamer, workpiece and exterior quality, prolong cutting tool service life at the same time, obtain optimal economic benefits, wait besides machine tool, cutting tool and reasonable cutting parameter normally beyond attention object, choose appropriate cutting fluid sort according to machining an object, use reasonable cutting liquid the chroma, cleanness that assures cutting fluid is spent and the temperature change that controls cutting fluid, will be helpful for ensuring quality of aperture of bore with a reamer. CNC Milling CNC Machining