MoldMaking Technology

MAY 2017

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Software 18 MoldMaking Technology —— MAY 2017 a consistent chip load. When enter- ing tight areas, slower feed rates are applied upon reaching the maximum set-allowance for tool engagement. One challenge with step-up rough cutting is the amount of time the tool spends cutting only at its tip, which is where you will see tool wear first. To reduce tool wear, consider a surface- based CAD/CAM that recognizes the exit motion of a trochoidal movement and raises up the cutting tool slightly in the Z direction. This keeps the tool off of the steel while still maintaining a cir- cular movement, which in turn reduces the time the tool's tip is on the steel. This can extend cutter life. After the tool path has been dis- played, your surface-based CAD/CAM should apply an accurate representation In this simulation of step-up rough cutting, the green shows the Z level for stepdown, and the red and blue show approaches and escapes of the cutter. The key to this roughing strategy is ensuring the tool is not overloaded.

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