Cutting size (machining)

Intervention parameters for milling and grinding: cutting depth a _p , working intervention a _e , feed intervention a _f .

Relationship between depth and width of cut using the example of turning .

Forces or intervention variables are in the manufacturing technology in machining sizes directly by the operator on or the CNC program machine tool can be set. Among them include the feed f, the contact width (also cutting depth or cutting width ) or delivery and the depth of cut (cutting width working engagement ) . In contrast to this, the chip sizes are derived from the internal forces and result from the tool setting angle . ${\displaystyle a_{p}}$ ${\displaystyle a_{e}}$ ${\displaystyle \kappa }$

The work engagement is measured in the work plane. It is spanned by the vectors of the cutting and feed speeds. ${\displaystyle a_{p}}$

In manufacturing processes with rotating tools such as milling or grinding with grinding wheels, there is also work intervention. It is measured in the working plane, perpendicular to the feed direction. ${\displaystyle a_{e}}$

The feed engagement refers to the engagement of the tool in the feed direction.

Relationship with voltage quantities

The chip width is the width of the chip perpendicular to the cutting direction measured in the cutting plane . ${\displaystyle b}$

${\displaystyle a_{p}=b\cdot \sin {\kappa }}$

The chip thickness is the thickness of the chip perpendicular to the cutting direction, measured perpendicular to the cutting surface. ${\displaystyle h}$

${\displaystyle h=f\cdot \sin {\kappa }}$

The chip cross-section is the cross-section of the chip to be removed, measured in the cut surface.

${\displaystyle A=a_{p}\cdot f=b\cdot h}$

Metal removal rate

When calculating the material removal rate Q, there are special features for milling and grinding, since the cutting direction changes during the rotation of the tool. The volume removed per unit of time results here as

${\displaystyle Q=a_{p}\cdot a_{e}\cdot v_{f}}$

with as feed rate . ${\displaystyle v_{f}}$

Individual evidence

1. ↑ ^{a b c d} Denkena, Tönshoff: Spanen - basic, Springer, 3rd edition, 2011, p. 6 f.
2. ↑ ^{a b c} Andreas Risse: Manufacturing processes in mechatronics, precision and precision device technology , Springer, 2012, p. 143.
3. ↑ Denkena, Tönshoff: Spanen - basic, Springer, 3rd edition, 2011, p. 54.
4. ↑ Schönherr: Machining, Oldenbourg, 2002, p. 13 f.
5. ↑ Denkena, Tönshoff: Spanen - basic, Springer, 3rd edition, 2011, p. 281.
6. ^ Fritz, Schulze: Manufacturing technology , 9th edition, p. 265.
7. ^ Fritz, Schulze: Manufacturing Technology , 11th Edition, p. 286.