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Deep Kong Zuan designs a principle

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  • source:WEDEMEYER CNC Machining
Normal > is machined as a result of deep aperture is to be in close or close partly undertake below condition, cannot observe directly the cutting circumstance of cutting tool, accordingly, the reasonable design of cutting tool appears to the on the rails of cutting particularly important. Usually, the design of deep Kong Zuan should satisfy 3 principles: Normal >1, tooth chooses principle tooth norms the case of bear of cutting of susceptive of each tooth place in cutting process comes main basis choose, and cutting bear and tooth width are concerned, tooth width should reach the size of broach diameter to allocate according to the cutting position of each tooth. Tooth width allocates should satisfy 3 requirements: Normal >a, assure to get pointed eccentric throw E= (0.

1~0.

2) D0, e value and diameter of the broach that be reached by treatment material are concerned, its size decided the size of broach radial join forces and way. Reasonable offset makes measurable radial load is pressed to already machined hole wall, stability getting is cut since, strengthen the function that direct and improves aperture surface quality. Avoided to get pointed null cutting at the same time, improvement gets a heart to be in abominable cutting condition; Normal >b, A+C+e+F (1~2) Mm, must exist to be built certainly between each tooth namely receive an amount; Normal >c, A+C-e-F (1~3) Mm, this can make cutting radial load presses guide from beginning to end to piece, oriented piece clingy already machined hole wall to be advanced ahead, make full use of oriented piece oriented action, assure the linearity of bore. Following plan institute show each variable sense. 2, tooth material chooses principle Normal > tooth material should age according to each the bear that gets and cutting position will choose. Central tine gets greater axial power, extruding attrition is serious, cutting condition is abominable, accordingly Lv of take an examination chooses bending strength tall, the YG with good impact resistance kind or YW kind hard alloy razor blade; And outside tine and intermediate tine because cutting rate is higher, it is good to should choose red rigid, the YT with tall wearability kind alloy, oriented piece should choose the YT with tall wearability kind material. To the treatment of general alloy steel, all tooth material should choose a kind omnibus good stuff, use YT798 at present. Normal >3, cutting tool chooses principle Normal > deep aperture machines the angle of cutting tool to basically be decided according to workpiece material. The stability that reasonable cutting tool angle cuts a course to assuring to get, break bits to reach raise cutting tool durability to have very great help. The horn after the horn before cutting tool is mixed is among them the most important angle, general of each cutting blade before horny γ 0=00, difficult treatment material takes γ 0=1~30, the stuff with good processability takes γ 0=3~60, brittleness and cold rigid material are desirable negative worth; The horn after blade takes α 0=8~120 commonly outside, inside blade should somes big, 0=12~150 extraction α . CNC Milling