CNC Machine Tools

Total Hours in Course81

Number of hours for lectures6

Number of hours for laboratory classes18

Independent study hours57

Date of course confirmation17.02.2015

Responsible UnitInstitute of Engineering and Energetics

Course developer

Inženiertehnikas un enerģētikas institūts

Jānis Lāceklis-Bertmanis

Dr. sc. ing.

Course abstract

The aim of the course is to provide the theoretical knowledges and practical skills in the management of a set of numerical control machine tools, cutting mode selection of the coordinate reference systems and zero points, CNC control programs.

Learning outcomes and their assessment

1. Knowledge - of the importance of job security in working with CNC workbench – practical works; manages numerical control workbench management principles - practical work;
2. Skills - able to develop CNC machining programs and to make out parts - Test and practical works;

3. Competence - is able to evaluate the advantages and disadvantages of the developed CNC machine tool management programs - practical work; is able to develop a CNC control programmers and practically make a component – Test.

Course Content(Calendar)

LECTURES:
1. Safety at work with CNC machine tools. Coordinate axes and reference systems – 1h;
2. The contents of the CNC program, the base of the workpiece, base selection – 1h;
3. The importance of G and M codes for the development of a digital control program – 1h;
4. Creation of lines and curves drills and contours. Use of basic cycles – 1h;
Test 1 – The meaning of the G and M codes of the control program – 1h;
5. Simulated program and program correction – 1h;
6. Preparation of machine tools and accessories for digital control CNC for work – 1h;
Test 2 – Creation of a control program for the given detail – 1h.

PRACTICAL WORKS:
1. Location of work safety warning signs on workbenches – 4h;
2. Coordinate systems on CNC machine – 4h;
3. Origin selection on CNC machine – 4h;
4. Development of processing program – 4h;
5. Parts making with CNC milling machine – 4h;

6. Parts making with CNC lathe – 4h.

Requirements for awarding credit points

Test type - test with mark. The final test task consists of a test on the theoretical subjects acquired during the study course. All tests, homework must be carried out.

Description of the organization and tasks of students’ independent work

Preparation for tests and practical works – 48 hours;

Criteria for Evaluating Learning Outcomes

Students who have at least assessment 6 in this course of study. The final examination test may not write, and the test rating is compared with the test assessment.

Compulsory reading

1. Avotiņš J. Metālapstrāde. Jelgava: LLU, 2009. 400 lpp.
2. Programming Workbook. HAAS AUTOMATION, INC.2800 Sturgis Rd. Oxnard, CA 93030. June 2006. 400 p.

3. Smid P. CNC Programming Handbook: A Comprehensive Guide to Practical CNC Programming. Edition 3. Industrial Press, Inc. 2008. 600 p.

Periodicals and other sources

1. Journal of Process Mechanical Engineering Proceedings of the Institution of Mechanical Engineers. Part E: Journal of Process Mechanical Engineering. Published by Sage Publications. ISSN (printed): 0954-4089. ISSN (electronic): 2041-3009.

Notes

Obligatory for students of the master of professional higher education program “Agricultural engineering”. 2nd year 3rd semester.

Atsauksmes