| Subject name (in Hungarian, in English) | CNC Practice | |||
|
CNC Practice
|
||||
| Neptun code | BMEGEGTBV95 | |||
| Type | study unit with contact hours | |||
| Course types and number of hours (weekly / semester) | course type: | lecture (theory) | exercise | laboratory excercise |
| number of hours (weekly): | 0 | 0 | 2 | |
| nature (connected / stand-alone): | - | - | individual | |
| Type of assessments (quality evaluation) | mid-term grade | |||
| ECTS | 3 | |||
| Subject coordinator | name: | Dr. Jacsó Ádám | ||
| post: | adjunct | |||
| contact: | jacso.adam@gpk.bme.hu | |||
| Host organization | Department of Manufacturing Science and Engineering | |||
| https://manuf.bme.hu/ | ||||
| Course homepage | https://manuf.bme.hu/?page_id=517 | |||
| Course language | hungarian | |||
| Primary curriculum type | optional | |||
| Direct prerequisites | Strong prerequisite | none | ||
| Weak prerequisite | ||||
| Parallel prerequisite | ||||
| Milestone prerequisite | at least obtained 0 ECTS | |||
| Excluding condition | none | |||
Aim
The course aims to teach the students the programming methods of CNC machine tools, which are widely used in industry, through guided and independent laboratory exercises. The structure of the subject is entirely practice-oriented, and both theoretical and practical knowledge are imparted in labs using machine tools. Students of the course can learn about the basics of cutting processes on a CNC milling machine, dialogue-based CNC programming, programming the machining of various geometric features (face milling, milling of external and internal contours, drilling cycles, roughing and smoothing operations, etc.), geometric transformations used during programming (mirroring, rotation, scaling, etc.), with different cutting tools and equipment, they can gain experience in machine setup and part production.
Learning outcomes
Competences that can be acquired by completing the course
Knowledge
The student understands the normal operation of the machining centre and the CNC controller. The student is aware of the basic rules of programming. The student understands the program's structure and can choose the right machining strategy. The student knows the operation of the controller, its characteristics and application fields. The student understands the importance of workpiece zero offset measurement and tool measurement. The student is aware of the operation of the machining centre during production, the elimination of any problems that may have arisen, and the management of restarted production. The student knows how to program the machining of external and internal contours. The student knows the importance, characteristics and application fields of drilling cycles. The student is aware of the transformation methods in programming. The student understands the importance of general health and safety rules of workshop-level work.
Ability
The student can plan the machining process for the production of the given part. The student is capable of producing a part designed in a CAD system. The student chooses the machining methods and the tools necessary for the part production. The student can identify possible machining errors and problems. The student reveals the causes of possible machining errors and problems. The student is capable of performing and evaluating basic mid-production measurements. Based on in-process production measurements, the student understands the manner and quality of the necessary intervention in the machining procedure. The student professionally handles the machine tools, equipment and cutting tools required for processing. The student uses experience to maintain and increase machining efficiency. The student uses professional lexical knowledge fluently in interpreting and implementing individual working stages of machining.
Attitude
The student is open to learning about the fundamental processes of component production. The student participates in implementing individual work processes proactively and responsibly. The student can provide accurate and error-free task solutions for engineering precision. The student strives to implement the principle of energy efficiency and environmental awareness when solving production technology tasks. The student appreciates the equipment and tools provided.
Independence and responsibility
The student can independently think through cutting tasks and problems. The student accepts the well-founded professional critical comments and opinions. As part of a work team, The student cooperates with his fellow students in solving tasks. The student assumes responsibility for maintaining the integrity of his fellow students and the equipment and tools. The student is committed to systems thinking and problem-solving principles and methods.
Teaching methodology
The purpose of the subject is to provide students with a practical basis for using and programming CNC machine tools. The tasks are performed independently or in small workgroups during the laboratory exercises. The activities of the students are managed and supervised by the lecturer. The students' preparedness is assessed during each laboratory exercise (with the help of continuous communication and verbal control), considering the students' activity, preparation and knowledge.
Support materials
Textbook
Mátyási Gyula, Sági György: CNC, CAD/CAM - Számítógéppel támogatott technológiák, Műszaki Könyvkiadó, ISBN 9789631660487, [2012]
Lecture notes
Online material
https://www.nct.hu/pdf/NC_Documents/Magyar/Maro/magprm_2xx.pdf
Validity of the course description
| Start of validity: | 2024. January 1. |
| End of validity: | 2028. July 15. |
General rules
The condition for completing the subject is that the student participates in at least 85% of the labs. The grade's determination matches the subject's practice-oriented nature, as it is based on an independently solved programming project at the end of the semester. The project task includes preparing the machining program for a prismatic part and then machining the part at a CNC machining centre.
Assessment methods
Detailed description of mid-term assessments
| Mid-term assessment No. 1 | ||
| Type: | formative assessment, point-in-time personal act | |
| Number: | 1 | |
| Purpose, description: | The purpose of the student achievement assessment is to evaluate the comprehensive theoretical and practical knowledge of the students and the experience gained during the semester. The student achievement assessment is done at the end of the semester by presenting an independently solved project task. The project task includes preparing the machining program for a prismatic part and then machining the part at a CNC machining centre. | |
Detailed description of assessments performed during the examination period
The subject does not include assessment during the examination period.
The weight of mid-term assessments in signing or in final grading
| ID | Proportion |
|---|---|
| Mid-term assessment No. 1 | 100 % |
The weight of partial exams in grade
There is no exam belongs to the subject.
Determination of the grade
| Grade | ECTS | The grade expressed in percents |
|---|---|---|
| very good (5) | Excellent [A] | above 90 % |
| very good (5) | Very Good [B] | 86 % - 90 % |
| good (4) | Good [C] | 71 % - 86 % |
| satisfactory (3) | Satisfactory [D] | 56 % - 71 % |
| sufficient (2) | Pass [E] | 41 % - 56 % |
| insufficient (1) | Fail [F] | below 41 % |
The lower limit specified for each grade already belongs to that grade.
Attendance and participation requirements
At least 85% of laboratory practices (rounded down) must be actively attended.
Special rules for improving, retaken and replacement
The special rules for improving, retaken and replacement shall be interpreted and applied in conjunction with the general rules of the CoS (TVSZ).
| Taking into account the previous result in case of improvement, retaken-improvement: | ||
| new result overrides previous result | ||
| The way of retaking or improving a partial assessment for the first time: | ||
| partial assesment(s) in this group can be improved or repeated once up to the end of the repeat period | ||
| Completion of unfinished laboratory exercises: | ||
| missed laboratory practices may be redeemed by alternative partial assessment by the end of the retake period | ||
| Repetition of laboratory exercises that performed incorrectly (eg.: mistake in documentation) | ||
| incorrectly performed laboratory practice (e.g. Incomplete/incorrect report) can be corrected upon improved re-submission | ||
Study work required to complete the course
| Activity | hours / semester |
|---|---|
| participation in contact classes | 28 |
| preparation for laboratory practices | 14 |
| additional time required to complete the subject | 48 |
| altogether | 90 |
Validity of subject requirements
| Start of validity: | 2024. January 1. |
| End of validity: | 2028. July 15. |
Primary course
The primary (main) course of the subject in which it is advertised and to which the competencies are related:
Mechanical engineering
Link to the purpose and (special) compensations of the Regulation KKK
This course aims to improve the following competencies defined in the Regulation KKK:
Knowledge
- Student has the knowledge of the theories and contexts of fundamental importance in the field of engineering and of the terminology which underpins them.
Ability
- Student has the ability to apply the theories and related terminology in an innovative way when solving problems in a given field of engineering.
Attitude
- Student strives to meet and enforce quality standards.
Independence and responsibility
- Student has the ability to work independently on engineering tasks.
Prerequisites for completing the course
|
Knowledge type competencies
(a set of prior knowledge, the existence of which is not obligatory, but greatly facilitates the successful completion of the subject) |
Expected knowledge-type competencies in a few sentences |
|
Ability type competencies
(a set of prior abilities and skills, the existence of which is not obligatory, but greatly contributes to the successful completion of the subject) |
Expected skills in a few sentences |