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

Ch05


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5-1

()


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5-2

23


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sn As Ac b


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(U)


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5-3

(ship)


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5-3-1

(Continuous chip)


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5-6(a)(Rake angle)


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5-3-2

BUE


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


5 3 3

5-3-3

(Discontinuous chip)5-6(c)


5 3 4

5-3-4

(Serrated chip)


5 3 5

5-3-5

(Chip breakers)


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5-4


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5-5

5-5-1

(Rake angle)

(clearance angle)

(point angle)

(cutting angle)


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5-5-2

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


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


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5-5-3

ISO


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  • VB0.3 mm

  • VBmax0.6 mm


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  • VB0.3 mm

  • VBmax0.6 mm

  • KT0.06 + 0.3 f f

    (ISO 3002/1)

    VB0.2 mm


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5-5-4

n

V

T

Vc Tc


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5-6


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(1)

f(mm/rev)

r(mm)


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(2)

f (mm/rev)


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(BUE)


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5-7


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A()CB()


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5-8


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


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


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(Ceramic)


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CBNCBNCBN1600K(HRC 60)CBN


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5-9

5-9-1


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dmnwnw(rpm)dm(x)dwnwdw

tm


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ap

(xy)Ac

zw


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5-9-2

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


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(conventional milling)(climb milling)


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mm/rev

Vtmm/minntrpmaf ()f/TT


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V

t l


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( l + Dt )


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ab


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5-9-3


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( z ) f mm/rev t Vf

l ntrpm


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zw vf

d


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