300735 Automated Manufacturing: Manual CNC Part Programming Solution

This assignment solution demonstrates manual CNC part programming for a generic CNC mill, focusing on generating machine codes without CAD assistance. It includes creating NC code for a specific process, detailing the operations from defining the program zero to tool path instructions. The solution covers boundary surface programming and center milling operations, comparing manual NC programming with CAD/CAM approaches, and emphasizing the importance of post-processing for machine-specific code conversion. The document also highlights the differences between numerical part programming and CAD/CAM machine operations, addressing aspects like speed, feed management, and path selection. Desklib offers a platform to access this and many other solved assignments.

Solution:
The part programming divided into two segment. Both operations of NC part programming have
demonstrate in following figure. The operation are follows as given number from 1 to 18
Figure. 1 Part programming for boundary surface of Sheet
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Figure. Part programming for center milling operation
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N01 G71 G90 G94
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N02 G00 X-20 Y 0
N03 G00 Z20
N04 G01 G42 D20 Z -20 S1000 F200 M03
N05 G01 X0 Y0
N06 G01 X220
N07 G01 X 250 Y -30
N08 G01 X 250 Y -330
N09 G02 X 220 Y -360 R 30
N10 G01 X 30 Y -360
N11 G02 X 0 Y -330 R30
N12 G01 X 0 Y -30
N13 G01 X 30 Y 0
N14 G01 X0 Y0
N15 G00 Z +20
N16 G00 X 110 Y -75
N17 G01 X 140 Y -75
N18 G02 X 155 Y -90
N19 G01 X 155 Y -270
N20 G02 X 140 Y -255
N21 G01 X 110 Y -255
N22 G02 X 95 Y -270
N23 G01 X 95 Y -90
N24 G02 X 110 Y -75
N25 G00 Z +20
N26 G40
N27 G00 X -20 Y 0
N28 G00 Z 20
N29 M30
NC part programming:
Answer: 5
In manual NC part programming, it is require to crate NC code for the specific process and
operation as well. Whereas the CAD/ CAM part programming is used for multipurpose when it
develop for first time, it can feed into other computer device and machine operation also for
same operation. It is require to convert into machine language. The programming post process
used to change code which is necessary to read and operate through NC controller for particular
machine operation. The CAD/CAM post processor must be feed into specific code such as G-
code and N-code with the X, y and Z co-ordinate system. The output must be written in
individual machine tools.
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For numerical part programming, it is not necessary to perform with specific source, it can
provide accurate output without specific source. Whereas in CAD/CAM machine operation need
automatic selection process for the individual machine operation. Also, the CAD/CAM machine
tool system can manage speed and feed at running operation. Path selection for the process also
automatic CAD/CAM system and machine tool selection. At the same time, the numerical part
programming techniques need manual feed data such as speed and feed for machine operation.
References
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disposition=inline%3B%20filename%3DSTEP-
NC_The_STEP_compliant_NC_Programmin.pdf
Laguionie, R., Rauch, M., & Hascoët, J. (2018). Toolpaths Programming
in an Intelligent Step-NC Manufacturing Context. Arxiv.org. Retrieved 9
April 2018, from https://arxiv.org/abs/0905.3079
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