Technology of cutting of dry type air cooling machines medium application to discuss in Che Xi

Introductive and current, cutting of domestic and international metal processes a trade, around raise the cutting efficiency, research task that prolongs cutting tool service life, roughly from the following 4 respects spread out: It is material of research cutting tool, 2 it is structure of research cutting tool, the 3 reasonable actor that are angle of geometry of research cutting tool and cutting dosage are chosen, the 4 development that are new technology of finishing of research cutting tool. The job of face of this all directions, improved the cutting efficiency of cutting tool and service life effectively, but, reduce temperature rise of cutting tool cutting, reduce cutting tool to wear away with cutting force, it is the main task that must study in cutting process and discusses likewise. Numerical control is changed shortened the settling time of the machine tool, machine tool and cutting tool make technical progress, those who changed treatment efficiency is rapid rise, also arise go out to cut bits in great quantities, send out a bigger quantity of heat; Right now, if still press traditional method: Increase cutting agent dosage, with respect to the greater harm of the environment that can create. Contain in traditional cutting agent a large number of sulfur, phosphor, chloric wait for material, these harmful liquid are discharged at will, conglutinate is placed in the open air that cuts bits to go up, when treatment splatter, rise, long let out be in happen constantly; But, its final a home to return to, will be drinking water source, land and air; Destroy zoology environment, serious effect mankind and move a plant to grow, him damage fry and descendants. Long-term since, use cutting agent, those who create the sources of energy is many use up, the burden that increases to the enterprise, people uses manufacturing cost concept already " reasonable " ground explanation; As to, to the immediate harm of handlers body, for production; Also do not have but Lai He. To solve afore-mentioned problems, each country government increased the superintendency strength of cutting fluid pollution, publish management of very rigorous cutting waste liquid, limitation and condemnatory measure in succession. Especially after ISO14000 environment standard and announce of ISO16000 healthy level are carried out, the pressure that the enterprise faces environmental protection is greater, the cost that because cutting medicine comes into being,makes rises in year after year. The graph forms this for the cost of machining center, see in the graph, fat dose oneself the 15% ～ that occupy a machine tool to run cost 30% . For this, study new cutting tool refrigeration, lubricant way; Carry out be used less or need not method of treatment of the dry type of cutting agent, half dry type makes improvement the technology of environment, another forward position that improves cutting efficiency and cutting tool service life. Current, after this kind of technology already accused to change into amount to, metallic cutting machines the main research task that course of study faces. Among them: Technology of air cooling cutting is one of doing type cutting processing technique partly, it is MQL(minim lubricates) of cutting technology outspread, use this one technology for rapid promotion, recently, combine production, we machined medium effect to undertake manufacturing test and verify in car, milling to technology of air cooling cutting. 2, the simple work principle of system of treatment of cutting of air cooling of system of air cooling cutting and design program are: The microtherm air cooling that lets machine of efflux of microtherm air cooling generate (- 30 ℃ ～ - 50 ℃ ) interfuse the plant of unusual drop is oily, and eject is nodded to cutting, to cutting tool before, hind knife face executive refrigeration, lubricate and discharge bits in order to reduce cutting temperature rise. This system is main by: The orgnaization such as oily atomizer of machine of efflux of air cooling of air compressor, low temperature, minim, ejector, cutting tool is comprised. Graph 2, the systematic diagram that processes unit for air cooling turning. If plan institute is shown, by the air stream that air compressor generates, classics dust segregator is cleared small ion, drop via air desiccator again to dew point, after entering air refrigeration unit to cool, before from fluctuation two direction gush is provided to the knife, the cutting dot from the back. 3, experiment of air cooling turning pursues 3, structure of use lathe tool 3.

Inside 1 air cooling, outside cooling turning and contrast of oily mist turning fall in air cooling action for test and verify, inside, outside the cutting function of cooling lathe tool, we made for a special purpose inside cold lathe tool (see a picture 3) . It can pass the conduit of interior of cutter hub of locate lathe tool, carry air cooling near knife head go up, below two exit, gush to bit before, hind knife face, watch one, the cutting effect of different and cooling means is cooling means cutting dosage cutting journey (cutting tool life) (Mm) rotate speed N (R/min) feed F (Mm/r) back penetration of a cutting tool measures Ap (Mm) cutting fluid (sparge) 50.

2124 air cooling (outside cooling) 50.

2158 air cooling (inside cooling) 100.

272.

5111 connect lathe tool with general (standard type can control type construction on dislocation) with cooling means is machined beyond two conduit (the structure sees a picture 2) with traditional sparge cooling cutting means undertook contrast. Its are as a result: It is together wear away at the back 0.

When 3mm, with cutting of traditional sparge refrigeration, journey of cutting tool cutting machines width to measure) by workpiece for 24mm(only; Use air cooling, from exterior on, gush of below two direction to bit before, the journey of cutting tool cutting from the back achieves 58mm, cutting tool life lengthened 1 times; But, when use air cooling, with inside when cutting of cooling lathe tool, made the condition that improves accordingly fall in rotate speed, feed and quantity of back penetration of a cutting tool, journey of cutting tool cutting still is as high as 111mm; Reflected adequately, below air cooling action, use inside the advantage of cold lathe tool. The cutting effect of 3 kinds of cooling means sees the watch is mixed graph 4. 3.

2, experiment condition machine tool: Numerical control establishs car work material: Norms: 1200 × of high temperature alloy, Φ 120 cutting tool: Turning of fat dose sparge and outside turning of cooling air cooling uses standard type type lathe tool can be pressed on dislocation. Turning of cooling air cooling is used inside self-restrained inside cold lathe tool. Bit model: CNCMG120408E cutting dosage: See a table condition of one air cooling: Machine of efflux of CTL-2/50 air cooling generates - air cooling of 50 ℃ left and right sides reduces air source: The workshop matchs tracheal pressure centrally 0.

3 ～ 0.

Cutting of 4Mpa fat dose uses oil: Cutting of mineral oil air cooling uses oil: Plant sex low temperature is oily (30 milliliter / when) 4, air cooling milling experiments 4.

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1, the in producing practice for technology of cutting of air cooling of test and verify to this application effect of milling of fat dose refrigeration and air cooling milling, combine production, we undertook a large number of fat doses cool the comparative experiment of milling treatment and craft of treatment of microtherm air cooling. The discovery when the experiment, the compression that the workshop offers source atmospheric pressure is not worth badly, the actuating pressure of machine of efflux of short of CTL-2/50 air cooling 0.

4 ～ 0.

8Mpa, but still undertook machining. The result is: Use lamina of a large number of stainless steel of fat dose milling to change a knife, can machine 5 ～ 8, and when air cooling milling, in actuating pressure insufficient circumstance falls, still be 10 to be able to machine 8 ～ , cutting tool service life is lengthened apparently. Should believe, below the problem before getting what assure adequately when gas source pressure, cutting of use air cooling, cutting tool life will have further lengthen. The experiment sees a picture with milling cutter and workpiece appearance 5. 4.

2, experiment condition machine tool: Numerical control of birth of factory of the 4th machine tool establishs Shanghai mill workpiece material: Norms of 1Cr13 stainless steel, material: 100 × of 50 × 48 (inside back arc face is differ sectional) cutting tool: Standard type hard alloy but model of razor blade of milling cutter of dislocation ball head: Dosage of cutting of P26315R16, STMT09T308: See a table condition of 3 air cooling: Machine of efflux of CTL-2/50 air cooling generates - air cooling of 50 ℃ left and right sides reduces air source: The workshop matchs centrally tracheal 0.

1 ～ 0.

Cutting of 15Mpa fat dose uses oil: Mineral oil (20 litres / cent controls) air cooling cutting uses oil: Plant sex low temperature is oily (30 milliliter / when) graph 5, the experiment is expressed with appearance of milling cutter and workpiece 2, dosage of cooling means cutting machines the effect of fat dose milling and air cooling milling a number (cutting tool life) () rotate speed N (R/min) take a knife.

8 air cooling of 55 ～ 180036002.

58 ～ 10 note: Rated job leeway is machine of efflux of CTL-2/50 air cooling: 0.

4 ～ 0.

8Mpa, but real work style is pressed in the experiment only 0.

15Mpa left and right sides, . 5, cutting effect is analysed from afore-mentioned treatment example, can think: In process of treatment of car, mill, the initial application effect of air cooling of use low temperature is good and remarkable. Especially, be like,be aimed at difficult treatment material: The milling that wait, turning has stainless steel and high temperature alloy practical. The preliminary conclusion that the experiment reachs is: ① works basically in machine of efflux of contented air cooling below the condition, technology of air cooling cutting mixes the cutting tool service life of type cutting technology to grow than the tradition. When cutting of ② air cooling, cool inside the effect of cooling means outside means comparing is good, outstanding performance is in of cutting tool service life increase a respect. ③ tries check proof, the service life of cutting tool follows air cooling to pressure, discharge increases and be lengthened. ④ is in process of car, mill, the thermal drop that nods considering cutting is small, accordingly, can increase cutting dosage appropriately; Because cutting tool service life is lengthened, saved wither to do work needs auxiliary time, treatment efficiency has those who show chopsticks to rise. ⑤ undertook actual measurement to the workpiece surface surface roughness of material of alloy of finish machining high temperature, can achieve Ra2 steadily.

05 ～ Ra2.

5 μ M, ⑥ undertook to machining the lamina of stainless steel machine after check of magnetic particle flaw detection is measured, did not discover the unusual appearance such as crackle. Because ⑦ takes the place of in order to enrage oily, without smoky aerosol, environmental cleanness, harmless to the body, advantageous operation, still improved efficiency, jockey person special reception. 6, the application of applied foreground and the technology of cutting of air cooling of problem low temperature that remain to be discussed further carries out a proof, it can improve cutting efficiency, lengthen cutting tool life, reduce specific power consumption and finished cost. Above all, the factory is the biggest person that be benefited, next, lead as a result of effect of the improvement of working environment, treatment rise, bring income to increase, the worker also is happy to accept, social meaning is more far-reaching. The place on put together is narrated, we think: This technology can satisfy the requirement that transforms conventional device with modern engineering technology, should have wide applied perspective, but this technology should get used to the rough machining at big cutting dosage, cutting tool structure (especially inside cold structure) wait for logical choice with cutting parameter, still remain farther experiment, discuss. CNC Milling CNC Machining