Syllabus contents
Theory
Introduction to NC, CNC and DNC – Components of a CNC system: Program,
Machine Control Unit, and Machine Tool – Toolings for CNC – ISO Designation
for Tooling – Tool Material Selection – Tool Inserts.
Steps involved in CNC Programming: Process Planning, Part Programming,
Program Entry, Program Verification, and Production – Manual Part Programming,
Data required for Manual Part Programming – Coordinate system – Designation
of axes – Datum points and Reference Points – NC Dimensioning: Absolute, and
Incremental – CNC Programming procedure –Format of a program.
CNC Part Programming for Turning Centres – Axes system used for turning
-Preparatory functions (G-Codes) for turning Centres – Auxiliary functions
(M-Codes) for turning centres – Tool function codes – Speed function codes –
Feed Specification codes – Rapid Positioning – Tool nose radius compensation –
Linear Interpolation – Circular Interpolation/Filleting.
Canned/Fixed Cycles: Box turning cycle (G90) – Taper turning (G90) –
Facing/Taper facing cycle (G94) – Grooving/Parting cycle (G75) – Single threading
cycle (G92) and Multiple threading cycle (G76) – Multiple turning cycle or Stock
removal cycle (G70 & G71) – Peck drilling cycle (G74) – Boring/Taper Boring
cycle (G90)
CNC Part Programming for Machining Centres – Axes system used for Machining
centres – Preparatory functions (G-Codes) for Machining Centres –Auxiliary
functions (M-Codes) for Machining centres – Preset – Cutter radius compensation
– Tool length compensation – Linear Interpolation – Circular Interpolation.
Canned Cycles: Drilling cycle (G81) – Counter sinking/Counter boring (G82)
–Tapping cycle (G84) – Reaming Cycle (G85) – Boring Cycle (G86) – Peck
drilling cycle (G83) – Sub Program – Mirroring – Circular Pocketing (G170 &
G171) – Rectangular Pocketing (G172 & G173).
15
Ex.No Name of the Experiment
1. Write a Part Program for producing the component shown below in the
turning center, simulate it and produce the component – Using Linear
and Circular Interpolation. Raw Material Size: φ30 mm dia × 41 mm
length. Component Diagram:
5
(iv)
2. Write a Part Program for producing the component shown below in the
turning center, simulate it and produce the component – Using Box turning
cycle, Facing cycle, and Grooving cycle (G90, G94, and G75). Raw
Material Size: φ 30 mm dia × 70 mm length Component Diagram:
Note: Facing 0.5 mm (20 mm to 19.5 mm)
5
3. Write a Part Program for producing the component shown below in the
turning center, simulate it and produce the component – Using the
threading cycle (G92/G76).
Raw Material Size: φ25 mm dia × 70 mm length
Component Diagram:
5
1. Raw Material 4. Facing / Taper Facing Cycle (G94)
2. Box turning Cycle (G90) 5. Grooving / Parting Cycle (G75)
3. Taper Turning Cycle (G90) 6. Circular Interpolation
(v)
4. Write a Part Program for producing the component shown below in the
turning center, simulate it and produce the component – Using multiple
turning cycle (G70 & G71).
Raw Material Size: φ30 mm dia × 41 mm length
Component Diagram:
5
5. Write a Part Program for producing the component shown below in the
turning center, simulate it and produce the component – Using Peck
drilling and Boring cycles (G74 & G90)
Raw Material Size: φ30 mm dia × 70 mm length
Component Diagram: Steps: (1). Pilot Drill – 3 mm dia, (2). Drill 10
mm dia, (3). Boring to 15 mm dia, (4). Taper Boring to 21 mm dia
5
(vi)
6. Write a Part Program for producing the component shown below in the
Machining center, simulate it and produce the component – Using Linear
and Circular Interpolation
Raw Material Size: 100 mm × 100 mm × 15 mm
Component Diagram:
5
7. Write a Part Program for producing the component shown below in the
Machining center, simulate it and produce the component – Using Peck
drilling, Reaming, Tapping and counter-sinking cycles
Raw Material Size: 80 mm × 80 mm × 20 mm
Component Diagram:
5
8. Write a Part Program for producing the component shown below in the
Machining center, simulate it and produce the component – Using
Mirroring function
Raw Material Size: 120 mm × 120 mm × 20 mm
Component Diagram:
5
(vii)
9. Write a Part Program for producing the component shown below in the
Machining center, simulate it and produce the component – Using Circular
and Rectangular Pocketing
Raw Material Size: 100 mm × 100 mm × 20 mm
Component Diagram:
5
Revision + Test 15
Total 75
(viii)