CNC Programming and CNC Machining
Teacher
Dr. Manisha Priyadarshini
Category
Core Courses Skill Courses
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Code(Credit) : CUTM1085(0-2-0)
Course Objectives
- Evaluate manufacturing assignment based on critical thinking and problem solving skills. Become a good communicator and effective team member.
- Practice writing complex “G” code programs for CNC turning centers that meet the part specification
- Interpret and demonstrate complex “G” code programs for CNC milling centers that meet the part specification
- Prepare “G: code programs to perform secondary operations including tapping, countersinking, counter boring, and threading.
- Describe and illustrate common problems with tooling and fixtures in CNC programming and machining.
Learning Outcomes
- Explain applications and advantages of CNC machines and technology
- Demonstrate and explain various CNC control Calculate technological data for CNC machining
- Understand the importance and use of PPE’s
- Prepare and understand line program for various profiles Identify and set parameters for various simulators
- Prepare programs , demonstrate , simulate and operate CNC lathe machines for various machining operations
- Prepare programs , demonstrate , simulate and operate CNC milling machines for various machining operations
- Define and explain Modern CNC systems and explain its importance in manufacturing
Course Syllabus
Module I: introduction to CNC technology & programming
Introduction to CNC technology – CNC machines controls. History & development of CNC technology.
Conventional Vs. non-conventional machine tool. Numerical control on CNC machine tools CNC control and CNC Control and types of CNC control Calculation of technological data for CNC machining. CNC clamping system.
Expt 1: Identification of different parts of CNC lathe including data input
Expt 2: Identification of different parts of CNC mill including data input
Module II: Drawing interpretation
Drawing interpretation practice, identifying feature from sketch and operation from feature
Expt 3: Practice on CNC controller using on-screen simulation for generating different profile
Module III: CNC programming
Introduction to CNC programming Introduction and demonstration of line programs CNC programming or lathe & milling machine using iso codes into the CNC simulator. CNC programming for lathe and milling machines using different machining cycles into the CNC simulator. Procedures Associated with part programming, Cutting process parameter selection, Process planning issues and path planning, G & M Codes, Interpolations, Canned Cycles and Subprograms.
Expt 4: Writing simple code and test on controller for CNC lathe
Expt 5: Writing simple code and test on controller for CNC mill
Expt 6: programming canned cycles for simple profile
Module IV: Program generation for CNC milling and turning
Tool compensations Exposure for programming and simulator of FANUC, SINUMERIC
Programming exercise.
Expt 7: Machining of programmed exercise on CNC lathe machine.
Expt 8: Machining of programmed exercise on CNC milling machine.
Module V: CNC Turning
Plan and optimize programs for CNC turning operations. Calculate parameters like speed feed etc. and set a references for the various operations. Prepare operation and operation sequence for the lathe operations like turning, grooving etc. Prepare & set CNC lathe operations and test run programmed Execute program and inspect simple geometrical forms / standard parts Use of various PPE’s on CNC lathe machine
Expt 9-11: Programming for complex shape cylindrical objects with parameter selection, machining. (at least 3 exercises)
Module VI: CNC Milling
Plan and optimize programs for CNC Milling operations. Calculate parameters like speed feed , depth of
cut etc. and set a references for the various operations. Various methods of work process like edge
finding block center etc. Prepare & set CNC Milling operations and test run programmed. Execute program and inspect simple geometrical forms / standard parts. Use of various PPE’s on CNC milling machine
Expt 12-14: Programming for complex shape prismatic objects with parameter selection, machining. (at least 3 exercises)
Module VII: Modern CNC systems
Introduction to advanced CNC systems: Computer Aided Part Programming (CAPP), it’s application using Solidworks/MasterCAM. comparison of manual part programming and CAPP for a simple component, Automatic Tool Changer, Automatic Pallet Control, Automatic Storage & Retrieval Systems.
Expt 15: comparison of manual part programming and CAPP for a simple component
Text Books:
- Programming of CNC machines, by Ken Evans
- CNC Programming Handbook by Peter Smid
- NC Control by Kundra Rao, Tewari
Reference Books:
- https://cache.industry.siemens.com/dl/files/554/74475554/att_56792/v1/PGsl_0313_e n_en-US.pdf
- G codes, M codes Handbook, by Mazak Corporation, sources:
- available at Mini Tool Room, Parlakhemundi campus, CUTM
- https://gist.github.com/anonymous/f14c73a7174bf8a43f0c970817897454
Course outline Prepared by: Sudeep Kumar Singh Date:21/05/2020
Source of reference:
1. Curriculum PG Dploma Tool Desgn and CAD/CAM-level-8
2. Quora.com
Session Plan
Session 1
Conventional Lathe machine. Difference between conventional and CNC lathe. Different types of operations performed on lathe.
https://www.youtube.com/watch?v=hheFVuUBpxo
Identification of different parts of CNC lathe including data input
Session 4
Practice on CNC controller using on-screen simulation for generating different profile-1
Session 5
Practice on CNC controller using on-screen simulation for generating different profile-2
Session 7
Practicing simple code writing on controller for CNC lathe
Session 9
Practicing simple code writing on controller for CNC mill
Session 11
Practice on programming canned cycles for simple profile
Session 13
Machining practice on CNC lathe machine-1
Session 14
Machining practice on CNC lathe machine-2
Session 16
Machining practice on CNC milling machine-1
Session 17
Machining practice on CNC milling machine-2
Session 18
Programming for complex shape cylindrical objects with parameter selection, machining-1
Session 19
Programming for complex shape cylindrical objects with parameter selection, machining-2
Session 20
Programming for complex shape cylindrical objects with parameter selection, machining-3
Session 21
Programming for complex shape prismatic objects with parameter selection, machining-1
Session 22
Programming for complex shape prismatic objects with parameter selection, machining-2
Session 23
Programming for complex shape prismatic objects with parameter selection, machining-3
Project Report:
Based on the below case studies develop a presentation product to identify skills gained during the training. Specifically identify the process/institutional changes required for the CNC operations.
Case Study-1:
https://www.youtube.com/watch?v=_IA0QD_AuV4&feature=emb_logo
Case Study-2
https://www.youtube.com/watch?v=IqGakWMXS1w
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