Treatment of high grade mould establishs milling cutter with CBN small diameter

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  • source:WILDA CNC Machining
Japanese day developed the CBN ball head that is used at machining high grade mould to establish milling cutter and blade of CBN circular arc to establish milling cutter into tool company, use its function characteristic and treatment example brief introduction to be as follows now. 1 CBN material is characteristic the comparison of all sorts of cutting tool material. CBN(gets together nitrogen of brilliant cubic metre changes boron) 3 times what the hardness of material is hard alloy material about, the cutting tool that makes with it can realize macrobian life to machine. CBN material hardness is tall and easy damaged, make with its can come true long when the small diameter that successive high accuracy machines establishs milling cutter, need uses scientific grinding technology and the cutting tool design that prevent collapse blade. The nicety that is antrum of late pattern of contented tall hardness machines demand and head of ball of SSBL200 CBN of characteristic of 2 cutting tool stands milling cutter SSBL200 to grow head of neck CBN ball to establish milling cutter is developed. It was used can prevent blade of collapse of point of a knife and the cutting blade form that drop cutting negative charge, realized the macrobian life of high accuracy treatment and cutting tool to change. The R precision of this cutting tool achieves ± 0.

005mm, r0.

The effective length of limits of norms of 05 ～ R1mm is 0.

3 ～ 10mm, in all 23 kinds of norms. The milling of efficient, high spirit that blade of SSR200 CBN circular arc establishs blade of circular arc of milling cutter SSR200 CBN to establish milling cutter to be used at the mould. To prevent blade of collapse of point of a knife, undertook to point of a knife the aggrandizement of passivation is handled losing edge. The control program that development of this company proper motion uses when processing undertakes machining at the same time to circumferential blade from bottom blade, make bottom blade and circumferential blade implementation do not have the flowing join of lapping defect, made sure R precision achieves ± 0.

005mm. The norms limits of this cutting tool is Ø0.

5 ～ Ø2.

0mm, radius of circular arc of cutting blade corner is R0.

05 ～ R0.

5mm, effective length 1.

5 ～ 10mm, in all 26 kinds of norms. Head of ball of SSBL200 CBN of example of 3 treatment application stands milling cutter to machine the treatment of example stopwatch mould to use R0.

The head of SSBL200 CBN ball of 5 × 5L stands mould of stopwatch of mill of milling cutter essence antrum. Mould material is STAVAX(HRC52) , are made an appointment with when the treatment that finish is used, wear extent of part of the R after machining a mould antrum is 1µm about, treatment surface surface roughness is Rz1.

30µm. According to wearing away the state is mixed exterior surface roughness, still but proceed finish machining. Three-dimensional model the treatment of mould of antrum perpendicular wall uses R0.

The head of SSBL200 CBN ball of 1 × 1L stands mill of milling cutter essence three-dimensional model mould of antrum perpendicular wall, mould material is STAVAX(HRC52) , the cutting length of a mould antrum is mill of essence of life about 14m, are made an appointment with when using, cutting tool wears away position is good, machine Rz1 of exterior surface roughness.

85µm, still but proceed finish machining. Blade of SSR200 CBN circular arc establishs milling cutter to machine example to use Ø2 × R0.

The blade of SSR200 CBN circular arc of 5 × 6L establishs mould of mill of milling cutter essence antrum, the treatment that establishs milling cutter with head of ball of SSB200 standard CBN undertakes comparative as a result. Mould material is STAVAX(HRC52) , cutting condition sees a table 1, treatment sees a table as a result 2. When treatment is planar, although set of surface roughness of will academic surface is same standard, use circular arc blade to establish milling cutter to be able to establish milling cutter to choose older feed rate than using ball head. When this second essence mill machines circular arc blade to establish milling cutter to use 58 minutes, and when ball head stands milling cutter to use, differ about 2 times. In addition, machine the difference that naked eye of exterior quality presence can see. This shows, union machines utility to choose applicable cutting tool to be able to improve treatment efficiency, reduce finished cost. Express blade of circular arc of SSR200(of cutting tool of 1 cutting condition) (Ø2 × R0.

Head of ball of 5 × 6L)SSB200() 3000mm/min of speed of feed of 40000r/min of R1 rotate speed is cut deep (Ad × Rd)0.

05 × 0.

6mm0.

05 × 0.

Mist of 05mm cooling fluid oil expresses blade of circular arc of SSR200(of cutting tool of 2 treatment result) (Ø2 × R0.

Head of ball of 5 × 6L)SSB200() Rz1 of surface roughness of surface of 58min1h55min of handling time of surface of R1 essence mill.

9µmRz2.

3µm CNC Milling CNC Machining