Commit 8da5d034 authored by Nanditha Nair's avatar Nanditha Nair

Update week05.md

parent a4215ef8
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......@@ -35,16 +35,14 @@ PCB is an acronym for printed circuit board also known as a printed wiring board
### Types of Milling
<b>A. Conventional Milling (UP)</b>
<p align="center"><img alt="Conventional Milling" height="350" width="600"src="../../images/week05/conmilling.jpg" /> </p>
<p align="center"><img alt="Conventional Milling" src="../../images/week05/conmilling.jpg" /> </p>
1. Chip width starts from zero and increases which causes more heat to diffuse into the workpiece and produces work hardening
2. Tool rubs more at the beginning of the cut causing faster tool wear and decreases tool life
3. Chips are carried upward by the tooth and fall in front of cutter creating a marred finish and re-cutting of chips
4. Upwards forces created in horizontal milling tend to lift the workpiece, more intricate and expansive work holdings are needed to lessen the lift created
<b>B. Climb Milling (Down)</b>
<p align="center"><img alt="Climb Milling" height="350" width="600"src="../../images/week05/climbmilling.jpg" /> </p>
<p align="center"><img alt="Climb Milling" src="../../images/week05/climbmilling.jpg" /> </p>
1. Chip width starts from maximum and decreases so heat generated will more likely transfer to the chip
2. Creates cleaner shear plane which causes the tool to rub less and increases tool life
3. Chips are removed behind the cutter which reduces the chance of recutting
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