Technology

In this assignment you are expected to use EdgeCAM to generate 3-axis CNC tool path for the milling of the three-dimensional geometric model your group designed. The model and tool path are supposed to be used in the CNC lab sessions which will commence in Week 6. However, you can design a new model for the CNC lab if you do not want to use this one.

Resources available:

1. Ball end cutter:
?1mm (3 mm long *), ?2 mm (5 mm long), ?3 mm (8 mm long), ?6 mm (10 mm long)
2. Flat end cutter:
?1mm (3 mm long), ?2 mm (5 mm long), ?3 mm (8 mm long), ?6 mm (10 mm long)
3. workpiece:
The stock is made of ureol. The dimension of the stock is 150 mm (x) × 100 mm (y) × 25 mm (z) . Margins left in Y direction should be larger than 5 mm to reduce the risk of collision with the fixture (a vice) if your total cutting depth is more than 10 mm.

* Length of cutting edge

Requirement:

1. Total machining time should not exceed 60 min unless the geometry is extremely complex. Less than 45 min is preferred.
2. CAD models downloaded from internet are allowed.
3. This is a group assignment (2 students)
One online submission by one student is required. Please do not forget to put your partner’s name and student number on the coversheet.
Contributions made by each group member should be clarified in the report.
4. Use screen shot to assist your description in the assignment
5. Format:
There is no specific requirement on the format of the report. You just need to follow the general format which may include Introduction, Method/Procedure, Results/Discussion, Conclusion and Student Feedback (optional).
In the Discussion section, you may like to answer following questions:
– What strategies are used to optimize your tool path?
– How effective are the strategies? How much time is saved?
– What problems have you encountered?
– Your solutions
6. Production:
– Font size: 11 or 12
– Style: Times New Roman or Arial
– Single space in each paragraph
7. Documents to be submitted online:
– The assignment (a word or pdf file)
– CAD model
– EdgeCAM file (“.epf” file)
– Do not submit NC codes

8. Late submission without pre-approval will be not accepted.
Extension request in following unexpected circumstances are normally acceptable: bereavement, unexpected illness, religious observance grounds, or community services. Extension request for more than 1 week should be submitted to RMIT Special Consideration Unit.