摘要 :
A mathematic model is established using infinitesimal geometry for the cutting edge design of special milling cutters which use equal lead helix as cutting edges; equations are given for front-end and proclitic surface of revoluti...
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A mathematic model is established using infinitesimal geometry for the cutting edge design of special milling cutters which use equal lead helix as cutting edges; equations are given for front-end and proclitic surface of revolution of ball pillar milling cutters, ball taper milling cutters and angularly conical milling cutters;and corresponding models are established for the continuity cutting edge curves of milling cutters. Typical examples are given to illustrate the applications of mathematic models, which prove the correctness and applicability of these geometric models.
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摘要 :
In the milling process,the major flank wear land area (two-dimensional measurement for the wear) of a small-diameter milling cutter,as wear standard,can reflect actual changes of the wear land of the cutter.By analyzing the wearin...
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In the milling process,the major flank wear land area (two-dimensional measurement for the wear) of a small-diameter milling cutter,as wear standard,can reflect actual changes of the wear land of the cutter.By analyzing the wearing characteristics of the cutter,a cutting force model based on the major flank wear land area is established.Characteristic parameters such as pressure parameter and friction parameter are calculated by substituting tested data into their corresponding equations.The cutting force model for the helical milling cutter is validated by experiments.The computational and experimental results show that the cutting force model is almost consistent with the actual cutting conditions.Thus,the cutting force model established in the research can provide a theoretical foundation for monitoring the condition of a milling process that uses a small-diameter helical milling cutter.
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摘要 :
When machining D60 steel by high speed turn-milling under the different cooling and lubricating conditions, the cutting performance and the wear mechanism of the cermet cutter are researched. With water soluble cooling fluid, the ...
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When machining D60 steel by high speed turn-milling under the different cooling and lubricating conditions, the cutting performance and the wear mechanism of the cermet cutter are researched. With water soluble cooling fluid, the wear performance of the cermet cutter is bad, and does not adapt to the requirements of machining. However, when machining D60 by high speed turn-milling is under dry conditions, the wearing performance of the cermet cutter is very good and the cutting time lasts almost 3 hours. The wear mechanism of the cermet cutter under the water soluble cooling fluid is different from the dry condition. With the water soluble cooling fluid, a great deal of little chap units are formed since high frequency alternates heat stress. The crash and desquamate of these chap units is the main cause of the cutter wearing. Under dry cutting conditions, it is the main cause of cermet cutter wear in the felting phase intenerating causing rigid phase grains to fall.
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