Contents
Projects Guidance
Project 1Programming and Machining Training for Pin Shaft Turning
Task 1Learn Key Knowledge Points
1.1Preliminary understanding of CNC lathes
1.2Turning features
1.3Knowledge of cutters
1.3.1Classification of cutters
1.3.2Cutters selection
1.4Knowledge of fixtures
1.5Knowledge of measuring tools
1.5.1Vernier caliper
1.5.2Micrometers
1.6Basic instructions
1.6.1Basic format of the CNC turning program
1.6.2Basic preparatory function instructions
1.6.3Miscellaneous function Mcodes
1.6.4CNC lathes utilize Tcode
1.6.5spindle function Scode
Task 2Technological Preparation
1.7Parts drawing analysis
1.8Technological design
1.9CNC machining programming
Task 3Handson Training
1.10Equipment and appliances
1.11Get to know the machine tool
1.11.1Power on
1.11.2Operation panel
1.11.3Return to reference point
1.12Cutters preparation
1.13Set the workpiece origin
1.13.1Zaxis origin setting
1.13.2Xaxis origin setting
1.14Program editing
1.15Simulation of CNC machining program
1.16Part machining
1.17Part inspection
Project Summary
Exercises After Class
Project 2Programming and Machining Training for Handle Turning
Task 1Learn Key Knowledge Points
2.1Basic instructions
2.1.1Circular interpolation instruction
2.1.2Chamfer/Corner arc transition instruction
2.1.3Tool radius compensation instructions
2.1.4Profile modeling roughing turning cycle instruction G73
Task 2Technological Preparation
2.2Part drawing analysis
2.3Technological Design
2.4CNC machining programming
Task 3Handson Training
2.5Equipment and appliances
2.6Check before powering on
2.7Preparation before machining
2.8Part machining
2.9Part inspection
Project Summary
Exercises After Class
Project 3Programming and Machining Training for Drive Shaft Turning
Task 1Learn Key Knowledge Points
3.1General knowledge of thread
3.1.1Classification of threads
3.1.2Representation of metric threads
3.1.3Calculation of dimensions related to thread turning
3.2Thread measuring tool
3.3Basic instruction
Task 2Technological Preparation
3.4Part drawing analysis
3.5Technological design
3.6CNC machining programming
Task 3Handson Training
3.7Equipment and appliances
3.8Check before powering on
3.9Preparation before machining
3.10Part machining
3.11Part inspection
Project Summary
Exercises After Class
Project 4Programming and Machining Training for Drive Wheel Milling
Task 1Learn Key Knowledge Points
4.1Preliminary understanding of CNC machining center
4.2Milling characteristics
4.3Knowledge of cutters
4.4Knowledge of fixture
4.5Knowledge of measuring tools
4.6Technology knowledge
4.6.1Positioning principle
4.6.2Benchmarks
4.6.3Principles for the formulation of machining process
specification
4.7Basic instructions
4.7.1Basic format of CNC milling program
4.7.2Commonly used preparatory function instructions
4.7.3Commonly used auxiliary function instructions
Task 2Technological Preparation
4.8Part drawing analysis
4.9Technological design
4.10CNC machining program writing
Task 3Handson Training
4.11Equipment and appliances
4.12Get to know the machine tool
4.12.1Power on inspection
4.12.2Operation panel
4.12.3Return to origin
4.13Cutters preparation
4.14Edge finder and workpiece alignment
4.14.1Installing the edge finder
4.14.2The machining center calls the edge finder
4.14.3Workpiece alignment
4.15Cutter setting
4.16Program editing
4.17Simulation of CNC machining program
4.18Part machining
4.19Part inspection
Project Summary
Exercises After Class
Project 5Programming and Machining Training for Geneva Wheel Milling
Task 1Learn Key Knowledge Points
5.1Function and principle of coordinate system rotation
5.2Format and application of subprogram
5.2.1Format of subprogram
5.2.2Call subprogram
5.2.3Application of subprogram when a similar shape is
processed repeatedly
5.2.4Application of subprogram in layered processing
Task 2Technological Preparation
5.3Part drawing analysis
5.4Technological design
5.5CNC machining program writing
Task 3Handson Training
5.6Equipment and Appliances
5.7Check before powering on
5.8Part machine
5.9Part inspection
Project Summary
Exercises After Class
Project 6Programming and Machining Training for Threaded Hole of Drive
Shaft and Driven Shaft
Task 1Learn Key Knowledge Points
6.1Common taps
6.2Tapping process method
6.3Thread bottom hole size for tapping cutting
6.4Operation method of thread tapping
6.4.1Hand tapping
6.4.2Mechanical tapping
6.5Tapping instructions
6.6Inspection of threaded holes
Task 2Technological Preparation
6.7Part drawing analysis
6.8Technological design
6.9CNC machining program writing
Task 3Handson Training
6.10Equipment and appliances
6.11Check before powering on
6.12Part machine
6.13Part inspection
Project Summary
Exercises After Class
Preface
With the rapid development and wide application of automation， digitization， networking and intelligent technologies， the demand for talents in the manufacturing industry has undergone great changes， that is， the skilled talents of a single technology in a certain field have been transformed into a composite type of “generalist specialist”. In order to further implement the major task of deepening the integration of production and education proposed by the 19th National Peoples Congress， the “National Vocational Education Reform Implementation Plan” issued by the State Council clearly proposes to start the pilot work of the “diploma certificate several vocational skill grade certificates” system，i.e“1 X”vocational skill grade certificates system，in vocational colleges and applicationoriented undergraduate colleges and universities， and the specific guiding policies and requirements for indepth integration of production and education and “dualelement” education have been clarified. Among them， the 1 X vocational skill grade certificates system is a major system designed for overall consideration and planning for the development of vocational education， and promoting the deep participation of enterprises in collaborative education and deepening the training of compound technical and skilled personnel.
This book is one of the series of textbook for “1 X” vocational skill grade certificates (CNC turning and milling). It is compiled according to the guiding ideology of the training program of the Ministry of education for CNC skilled and urgently needed talents and the requirements of the vocational skill grade certificate for CNC turning and milling processing， combined with the current development of CNC technology and teaching rules. This series of textbooks is based on the examination sample questions of the vocational skill grade certificate of CNC turning and milling machining， using a variety of domestic general CAD/CAM software， starting from the typical tasks of CNC turning and milling， by understanding engineering drawings and technological documents， compiling CNC machining process and machining procedures of parts， especially for the case analysis of CNC turning and milling comprehensive machining technology， especially for the case analysis of CNC turning and milling comprehensive processing technology， so that learners can master CNC programming， positioning and linkage processing， detecting and controlling the machining accuracy of products， testing the accuracy of CNC machine tools， and eliminating general malfunctions of CNC machine tools， etc.
At present， the published higher vocational textbooks for CNC turning and milling have disadvantages such as oldfashioned teaching ideas， slow content update， supporting resources with single form and poor conformity with textbooks， and lack of ideological and political resources， which do not meet the current teaching requirements of stereoscopic， multimedia， computerization， and indepth ideological and political elements. In response to these current situations， this textbook adopts the latest turning and milling equipment， the EPIP teaching mode， and indepth progressive writing methods， highlights practical skills training. After the book is published， there will be a large user group in the secondary and higher vocational schools and the training of CNC equipment machining personnel.
This book contains 6 projects. Project 1 and project 3 is written by Zhao Hui. Project 2 is written by Shi Qingwei. Project 4 is written by Wang Chen.Project 5 is written by Ma Xupeng. Project 6 is written by Wang Peilei. Wang Qixiang Participates in the translation of this book.
Due to the limited level of editors， there will inevitably be flaws， deficiencies and errors in this book. I urge teachers， students and readers who use the book to criticize and correct me.
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