Treatment austenite stainless steel uses bit of microcosmic geometry appearance and coating optimize

Of 1mm pour arris. Of broach point pour a circle to use wool to brush craft, with the three-dimensional optics that contains GFM MikroCAD the measuring instrument measures the round radius of point. The broach diameter that the experiment uses is 8.

5mm, contain inside cooling aperture. Auger cut speed to be 60m/min, feed turns for every 0.

1 - 0.

25mm. In full trial, use 5% emulsion to serve as cooling lubricating fluid, feed flow pressure is 40bar. Auger cut via, aperture grows 25mm, the long way of aperture is compared adjacent 3. Test specimen material is the most commonly used austenite stainless steel 1.

4301 (X5CrNi18-10) . Result of feed force test shows, inside the feed limits of the experiment, point of first-rate cutting blade pours round radius to be 14 μ M. Not only bigger point pours round radius to be able to produce greater feed power, even if the point that is less than 14 μ M pours round radius, its feed force also is more than round radius to be the broach of 14 μ M. In addition, pour round radius when point when the value is greater, knife face pours arris to also can bring about feed force to rise apparently before. The experiment returns discovery, the influence that microcosmic geometry appearance cuts torque to getting and the influence to feed force have cutting blade to concern similarly, what what differ is, it wants to the influence of torque a few smaller. Appearance of as microcosmic as cutting blade also geometry has the figure cutting bits that gets the generation that cut place to concern apparently, dan Zaigang begins to get test specimen level, the figure cutting bits that produces is very similar still. Become when bore is deeper, round to point radius is bigger the bit that had pouring arris with face of the knife before be opposite beforehand, long cut bits grow in quantity with what tangle together, and this is planted the case is more clear when feed is lesser. Have minor point to pour round radius to be worth but the bit that did not pour arris, it is in feed 0.

When 1mm, can produce what won't tangle together to be mixed shortly cut bits, rose to machine dependability thereby, because short cut bits to jam not easily the chamfer holding bit of broach. When good in treatment tenacity workpiece stuff, the case that in bore exit generation wool perverses is very common, the size that wool perverses and feed are concerned. Reduce feed to be able to reduce wool to perverse on certain level height, but, reduce feed to be able to bring about handling time longer with finished cost taller. The experiment shows, cutting blade is microcosmic geometrical appearance has distinct effect to wool perversing height. Inside the feed limits that experimenting (0.

1 - 0.

25mm) , round radius approachs point 0.

The hair that the broach place of 14 μ M produces perverses height is the smallest. Coating can lengthen broach significantly life and not the photograph of hard alloy broach of coating is compared, use horniness coating to be able to improve broach life significantly. However, inside a paragraph of quite long period, the breed of horniness coating ever maintained relative stability. Just arrived the last few years, ability development gives a lot of new coating systems. Differ besides coating material outside, the structure of coating also arrives by monolayer multilayer, arrive again coating of accept rice structure, become more and more complex. Accordingly, although preelection the coating system that fits experiment requirement, but be in the experiment or compared breed of a lot of coating. Undertook all sorts of coating are mixed adoption not the life test of the broach of integral hard alloy of coating. Experiment broach used identical hard metal matrix, identical macroscopical with microcosmic geometry appearance, and same point pours round radius (14 μ M) . Opposite at not coating broach, broach of coating of two kinds of TiN has lesser advantage only on wearability. Cutting effect is better is TiAlN, TiAlN+WC/C, TiCN, TiB and AlTiSiN coating broach, and the cutting tool life of AlCrN coating is apparent broach of excel other coating. Compare with TiN coating photograph, mix in same cutting condition wear away bandwidth is spent (100 μ M) below the regulation, the cutting distance of AlCrN coating broach is 3 times of TiN coating broach. In addition, alCrN coating broach is being gotten after cutting length to achieve 65m, still can continue to use, make clear this broach to should be used below taller cutting speed, can achieve better economic result thereby, and can managing cutting tool and machine tool cost, reduce finished cost. Conclusion studies the result shows: The microcosmic geometry appearance of blade of ① broach cutting and coating reach a result to have apparent effect to machining a process; When ② getting cuts austenite stainless steel, the most appropriate point pours round radius to be 14 μ M; Face of ③ advanced knife increases the practice of arris to should abandon; ④ uses AlCrN coating to be able to improve the treatment efficiency of cutting tool significantly. CNC Milling CNC Machining