Ch05
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Ch05. 5-1  緒 論. 實際切削加工過程中,影響加工品質的主要因素有切削條件 ( 切削速度、進給、切深 ) 、刀具材料、刀具幾何形狀、工件材料、工具機性能。. 5-2  切削力學與能量. 為了解析基本金屬的切削力學,首先定義切削的維度關係,當刀具切刃口與工件和刀具間相對運動的方向相垂直者為 2 維切削,即為正切削。而刀具的切刃口與工件和刀具間相對運動方向不相垂直者為 3 維切削,便是斜切削。. 切屑與刀面的摩擦係數 μ. 剪切面的平均剪應力 τ s ,平均垂直應力 σ n ,剪面的面積 A s ,切削面積 A c ,切削寬度 b. 切削比 由上式得.

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Ch05

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Ch05


5-1

()


5-2

23



sn As Ac b



(U)


5-3

(ship)


5-3-1

(Continuous chip)


5-6(a)(Rake angle)


5-3-2

BUE


(Continuous chip with Built-up Edge)5-7BUE


5-3-3

(Discontinuous chip)5-6(c)


5-3-4

(Serrated chip)


5-3-5

(Chip breakers)


5-4



5-5

5-5-1

(Rake angle)

(clearance angle)

(point angle)

(cutting angle)




5-5-2

(adhesion wear)(abrasion wear)(diffusion wear)


5-125-12(crater)(crater wear)(flank wear)


5-5-3

ISO


  • VB0.3 mm

  • VBmax0.6 mm


  • VB0.3 mm

  • VBmax0.6 mm

  • KT0.06 + 0.3 f f

    (ISO 3002/1)

    VB0.2 mm


5-5-4

n

V

T

Vc Tc


5-6


(1)

f(mm/rev)

r(mm)


(2)

f (mm/rev)


(BUE)


5-7



A()CB()


5-8


TMT18%(W)(Cr)(V)(Co)T-1HSS18%4%1%18-4-1HSSM5%(Mo)(Cr)(V)(W)(Co)


ISOP()K()M()WC312%WCTiCTaCNbCWC


(Ceramic)


CBNCBNCBN1600K(HRC 60)CBN



5-9

5-9-1


dmnwnw(rpm)dm(x)dwnwdw

tm


ap

(xy)Ac

zw


5-9-2

(slab-milling)(face milling)(end milling)


(conventional milling)(climb milling)


mm/rev

Vtmm/minntrpmaf ()f/TT


V

t l


( l + Dt )


ab


5-9-3


( z ) f mm/rev t Vf

l ntrpm


zw vf

d


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