| Course title | CNC Machine Tools |
| Course code | MmehB022 |
| Credit points (ECTS) | 5 |
| Total Hours in Course | 135 |
| Number of hours for lectures | 8 |
| Number of hours for seminars and practical classes | 36 |
| Number of hours for laboratory classes | 12 |
| Independent study hours | 79 |
| Date of course confirmation | 13/12/2023 |
| Responsible Unit | Institute of Engineering and Energetics |
| Prior knowledge | |
| MmehB002, Metal Processing Technology and Design I MmehB021, Metal Processing Technology and Design II MatZ4012, Material Science (Construction Materials) |
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| Course abstract | |
| The course aims 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;
2.Manages numerical control workbench management principles - practical work; 3.Able to develop CNC machining programs and to make out parts - Test No 1. and practical works; 4.Is able to evaluate the advantages and disadvantages of the developed CNC machine tool management programs - practical work; 5.Is able to develop a CNC control programmers and practically make a component. – Test No 2. |
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| Course Content(Calendar) | |
| Full time intramural studies:
LECTURES: 1. Safety at work with CNC machine tools. Work safety warning signs on their importance and positioning on CNC machine. Coordinate axes and reference systems – 1 hour; 2. The contents of the CNC program, the origin of the workpiece, origin point – 1 hour; 3. The importance of G and M codes for the development of a digital control program – 1 hour; 4. Creation of lines, drills and contours. Use of basic cycles – 1 hour; 5. Test – The meaning of the G and M codes – 1 hour; 6. Simulated program and program correction - 1 hour; 7. Preparation of machine tools and accessories for digital control CNC for work. Preparation of a digital-controlled CNC machine-tool for a technological process – 1 hour; 8. Test – Creation of a processing program for the given detail – 1 hour. PRACTICAL WORKS: 1. Location of work safety warning signs on workbenches – 3 hours; 2. Coordinate systems on CNC machine – 4 hours; 3. Origin selection on CNC machine – 5 hours. 4. Development of processing program – 5 hours; 5. Create a CNC programming codes – 5 hours; 6. Tools selection for working with CNC machines – 4 hours; 7. Parts making with CNC milling machine – 5 hours; 8.Parts making with CNC lathe – 5 hours. LABORATORY WORKS: 1.CNC workbench control panel – 3 hours; 2.Subprograms of processing program – 5 hours; 3.Use of processing cycles – 4 hours. Part time extramural studies: All topics specified for full time studies are accomplished, but the number of contact hours is one half of the number specified in the calendar. |
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| Requirements for awarding credit points | |
| Test type - exam. Examination tasks consist of: test about theoretical study; practical task on topics learned from laboratory works. All tests and laboratory work must be credited. | |
| Description of the organization and tasks of students’ independent work | |
| Preparation for tests and practical works. Homework: To create a CNC processing program for a given part. | |
| Criteria for Evaluating Learning Outcomes | |
| Students who have at least assessment 7 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. [tiešsaiste] [skatīts 05.02.2018.] Pieejams: https://www.ise.ncsu.edu/processes/wp-content /uploads/sites/11/2013/08/LatheProgramming Workbookxlwb.pdf. 3. Smid P. CNC Programming Handbook: A Comprehensive Guide to Practical CNC Programming. Edition. 3. Industrial Press, Inc., 2007. 600 p. 2003. gada izdevums: [tiešsaiste] [skatīts 05.02.2018.] Pieejams: https://books.google.lv/books ?id=JNnQ8r5me rMC&lpg=PA1&ots=P_ NIKQ5OtQ&lr&pg =PR20#v=onepage&q&f=false |
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| Further reading | |
| 1. Avotiņš J. Metālapstrāde: kursa darbs "Tehnoloģisko procesu izstrāde": metodiskie norādījumi. Jelgava: LLU, 2005. 90 lpp. 2. Сафин В.Н. Основы программирования фрезерных станков ЧПУ: учобное пособие к лабораторным работам. Челябинск: Издателский центр ЮУрГУ, 2012. 34 с. [tiešsaiste] [skatīts 05.02.2018.] Pieejams: http://docplayer.ru/44935780-Osnovy-rogrammirovaniya -frezernyh-stankov-s-chpu.html 3. CNC Programming Handbook. 3rd edition. New York, NY, USA: Industrial Press, Inc., 2007. | |
| Periodicals and other sources | |
| 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 bachelor of professional higher education program “Design and Crafts” for full and part time students. | |