| Subject name (in Hungarian, in English) | Machine elements 1. | |||
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Machine Elements 1
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| Neptun code | BMEGEGIBGG1 | |||
| 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): | 2 | 1 | 1 | |
| nature (connected / stand-alone): | - | coupled | coupled | |
| Type of assessments (quality evaluation) | exam | |||
| ECTS | 5 | |||
| Subject coordinator | name: | Dr. Kerényi György Zsolt | ||
| post: | associate professor | |||
| contact: | kerenyi.gyorgy@edu.bme.hu | |||
| Host organization | Department of Machine and Product Design | |||
| http://www.gt3.bme.hu | ||||
| Course homepage | http://www.gt3.bme.hu/bgg1 | |||
| Course language | hungarian, english, german | |||
| Primary curriculum type | mandatory | |||
| Direct prerequisites | Strong prerequisite | BMEGEGIBXGA, BMEGEMMBXN2 | ||
| Weak prerequisite | BMEGEVGBG10 | |||
| Parallel prerequisite | ||||
| Milestone prerequisite | at least obtained 0 ECTS | |||
| Excluding condition | BMEGEGEAGG1 | |||
Aim
To acquaint students with the principles and methods of machine construction, their basic tasks. To prepare for solving simpler construction tasks independently: to create structural models, to identify possible causes of failure, to estimate stress and limit states, to perform dimensioning and/or verification procedure, especially concerning various joints, springs, mapping elements, shafts and rotors in machines.
Learning outcomes
Competences that can be acquired by completing the course
Knowledge
Knows the most basic methods and procedures of machine building and design methodology. Provides an overview of production, maintenance, installation, etc., the most important rules for designing structures. Understands the main principles of sizing and inspecting machine structures. Aware of the determination of the tightening torque, force play and sizing of bolted joints. Provides an overview of the most important types of joints and fasteners, their operating principle, power play, selection, sizing and inspection methods. Knows the most important types of metal and rubber springs, their principle of operation, power play, selection, sizing, inspection methods (including the operation of spring systems and the most important issues of vibration damping). Knows the design, dimensioning, and verification methods for shafts and rotors, including fatigue, deformation testing, critical speed determination, and the problem of rotor balancing. Understands the phenomenon of fatigue, the principles of dimensioning for repetitive loads, the most important methods of traditional (safety area-based) and new dimensioning procedures. Aware of the theoretical foundations of the operation of seals, the materials of seals, the mechanism of operation, their design together with the installation environment. Understands the main aspects of the design of pipelines, pipe fittings, pressure vessels, their design methods, and the most basic methods of their dimensioning/ verification.
Ability
Able to interpret, characterize and model the structure and operation of the structural units and elements of mechanical systems, the design and relationship of the applied systems. Apply calculation and modelling principles and methods of mechanical design. Able to create simpler mechanical models (with the necessary abstractions and neglections). Able to select, scale and inspect joints (including shaft joints) and fasteners with the most important material, strength and shape. Calculates the tightening torque of the screw connection, the voltage generated in the screw. Calculates the mechanical properties of metal and rubber springs, their deformation and the stresses arising in them. Determines the design size of shafts and rotors using simple models of strength and deformation considerations and vibrational issues. Use the Wöhler curve, the Smith and Haigh diagrams to test and check the repetitive load on a component. Determines the stress components arising in a thin-walled pipe loaded with internal pressure and the wall thickness of the pipe. Recommends the selection and installation of suitable seals.
Attitude
Open to learning with his/her instructor and fellow students. Expands knowledge by continuously acquiring knowledge in the course of his/her work, Strives to learn and use the necessary standards when solving tasks. Strives for an accurate and error-free clear solution. Open to learning and using advanced computer systems.
Independence and responsibility
Independently thinks through the design tasks and/or problems to be solved of simple mechanical structures. Accepts well-founded professional and other critical remarks. Considering as many aspects as possible, it performs its task with a systematic and complex approach. With knowledge, the student makes a responsible, informed decision based on his/her analysis. Does his/her job with the responsibility of a (prospective) engineer conscientiously.
Teaching methodology
There is a two-hour lecture per week to transfer theoretical knowledge. Here, the technical knowledge and knowledge competencies required for the mid-year performance appraisal and exam are presented. Classroom exercises are used to practice the lecture's curriculum and consult on the planning task. The laboratory sessions are used to present basic mechanical components and perform simple measurements.
Support materials
Textbook
Szendrő Péter (szerk.): Gépelemek, Mezőgazdasági Kiadó, 2007. ISBN 9789632866451
Zsáry Árpád: Gépelemek I. Nemzedékek Tudása Tankönyvkiadó, Budapest, 2003. ISBN 97896319458509789631945850
Lecture notes
Tóth S. – Molnár L. – Bisztray S. – Marosfalvi J.: Gépelemek 1., Műegyetemi Kiadó, Budapest, 2007., azonosító: 45080identification: 45080
Tóth S. – Goda T.: Gépelemek 1 tervezési segédlet, Műegyetemi Kiadó, Budapest, 2010., azonosító: 45087
Online material
https://regi.tankonyvtar.hu/hu/tartalom/tamop425/2011_0001_521_Gepelemek/adatok.html
Validity of the course description
| Start of validity: | 2023. July 15. |
| End of validity: | 2028. July 15. |
General rules
Learning outcomes are assessed through two mid-year construction planning tasks during the diligence period. These partial performance evaluations prove the practical application of knowledge and competence. A mid-year partial performance evaluation is the preparation of a protocol for laboratory measurements. It is based on written performance measurement to be completed during the examination period (summary study performance assessment, exam) and active participation in the internships (partial performance assessments).
Assessment methods
Detailed description of mid-term assessments
| Mid-term assessment No. 1 | ||
| Type: | formative assessment, simple | |
| Number: | 1 | |
| Purpose, description: | It is a complex way of evaluating the knowledge, ability, attitude, and independence and responsibility type competence elements of the subject, the form of which is the individually designed construction planning task. The content, requirements, submission deadline and evaluation method of the planning tasks (2 in number) are determined by the person in charge of the subject in agreement with the supervisor. The tasks are 20-20 points, and 20-20% are included in the exam mark. | |
| Mid-term assessment No. 2 | ||
| Type: | formative assessment, simple | |
| Number: | 1 | |
| Purpose, description: | Laboratory sessions should be attended, measurements should be made, and appropriate protocols should be prepared. In laboratory measurements, the task is to measure the tightening torque of a screw and determine the springs' characteristics. The deadline for the submission of the minutes and the evaluation method is determined by the person in charge of the subject in agreement with the supervisor. The preparation of the protocols of good quality and their submission by the deadline is a criterion requirement of the subject. | |
Detailed description of assessments performed during the examination period
Elements of the exam:
| Written partial exam | ||
| Obligation: | mandatory (partial) exam unit, failing the unit results in fail (1) exam result | |
| Description: | The summary assessment consists of three written parts, each of which must reach the required minimum level separately, as follows: • elaboration of minimum questions: at least 5 out of 6 questions must be answered completely correctly. Criterion requirement. The time available is 10 minutes. • elaboration of theoretical questions: At least 11 points must be achieved from the total score of the theoretical questions (28 points). The time available is 50 minutes. • numerical examples and drawing question: Out of the total score of the tasks (32 points), at least 13 points must be achieved. The time available is 60 minutes. If the student does not meet the required minimum level in even one of the parts, the grade obtained for the exam is insufficient. | |
| Oral partial exam | ||
| Obligation: | does not apply | |
| Description: | ||
| Practical partial exam | ||
| Obligation: | does not apply | |
| Description: | ||
| Inclusion of mid-term results | ||
| Obligation: | mandatory (partial) exam unit, failing the unit results in fail (1) exam result | |
| Description: | Semi-annual planning assignments are included in the exam mark with a weight of 40%. To obtain a signature, design tasks must be completed at a level of at least 40%. In evaluating the design task, the quality of continuous progress, drawing and written documentation is evaluated. The design task: to compile the technical documentation, including the construction drawings and calculations performed within the framework of the individual work. | |
The weight of mid-term assessments in signing or in final grading
| ID | Proportion |
|---|---|
| Mid-term assessment No. 1 | 100 % |
| Mid-term assessment No. 2 | 100 % |
The condition for signing is that the score obtained in the mid-year assessments is at least 40%.
The weight of partial exams in grade
| Type: | Proportion |
|---|---|
| Written partial exam | 60 % |
| Inclusion of mid-term results | 40 % |
Determination of the grade
| Grade | ECTS | The grade expressed in percents |
|---|---|---|
| very good (5) | Excellent [A] | above 90 % |
| very good (5) | Very Good [B] | 85 % - 90 % |
| good (4) | Good [C] | 72 % - 85 % |
| satisfactory (3) | Satisfactory [D] | 59 % - 72 % |
| sufficient (2) | Pass [E] | 46 % - 59 % |
| insufficient (1) | Fail [F] | below 46 % |
The lower limit specified for each grade already belongs to that grade.
Attendance and participation requirements
The lack of the value means that there is no attendance requirement.
At least 70% the exercises (rounded down) must be actively attended.
At least 70% 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).
| Can the submitted and accepted partial performance assessments be resubmitted until the end of the replacement period in order to achieve better results? | ||
| NO | ||
| 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 cannot be improved or repeated, the final result is assessed in accordance with Code of Studied 122. § (6) | ||
| Completion of unfinished laboratory exercises: | ||
| missed laboratory practices may be performed in the repeat period, non-mandatory | ||
| 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 | 56 |
| mid-term preparation for practices | 7 |
| preparation for laboratory practices | 14 |
| elaboration of a partial assessment task | 8 |
| exam preparation | 35 |
| additional time required to complete the subject | 30 |
| altogether | 150 |
Validity of subject requirements
| Start of validity: | 2023. July 15. |
| 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 plan and carry out tasks to a high professional standard, either independently or in a team.
Independence and responsibility
- Student has the ability to work independently on engineering tasks.
Prerequisites for completing the course
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Knowledge type competencies
(a set of prior knowledge, the existence of which is not obligatory, but greatly facilitates the successful completion of the subject) |
none |
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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) |
none |