Cylindrical Cutting Clearance

12.4.2
Cylindrical cutting clearance
Fig. 1
Confident cutting clearance
FS cutting force uS cutting clearance z cylindrical height

The cylindrical height results in the greatest possible grinding without changing dimensions.

Eqn. 1
\require{color}\definecolor{myred}{RGB}{255,0,0} s_{\color{myred}0}<4
Eqn. 2
\require{color}\definecolor{myred}{RGB}{255,0,0} u_{\color{myred}S}=\frac{1}{150}\cdot s_{\color{myred}0}\cdot\sqrt{\frac{0,8\cdot R_{\color{myred}m}}{10}}
Cutting ClearanceuS=0.032mm 
Sheet thicknesss0 = 1mm
Tensile strengthRm = 295MPa
Calc 1
Cylindrical cutting clearance < 4 mm

Example I A DC04 with a sheet thickness of 1 mm results in a cutting clearance of 0.032 mm.

Eqn. 3
\require{color}\definecolor{myred}{RGB}{255,0,0} s_{\color{myred}0}>4
Eqn. 4
\require{color}\definecolor{myred}{RGB}{255,0,0} u_{\color{myred}S}=\frac{1}{200}\cdot s_{\color{myred}0}\cdot\sqrt{\frac{0,8\cdot R_{\color{myred}m}}{10}}
Cutting ClearanceuS=0.097mm 
Sheet thicknesss0 = 4mm
Tensile strengthRm = 295MPa
Calc 2
Cylindrical cutting clearance > 4 mm

Example I A DC04 with a sheet thickness of 4 mm results in a cutting clearance of 0.97 mm.

25
Semmlinger, E.; Hellwig, W.Spanlose Fertigung: Schneiden-Biegen-ZiehenVieweg Fachbücher19904. Auflage
© 2023 4Ming e.K.
Kdia v1.3.1
4Ming® Prototypes, tools, die cushions, presses
Management consulting, process development & process optimization
Interactive Sheet Metal Forming Technical Guide