102332 - MACHINE DESIGN

Subject type: Mandatory

Coordinator: Julián Horrillo Tello

Trimester: Third term

Credits: 6

In the subject fundamental subjects of the Design of Machines are worked. It is a key element for the consolidation of learning, as it allows students to apply in the design of machine elements that has been worked on in other subjects. On the other hand, it is a key source of theoretical and applied knowledge for the professional practice of the mechanical engineer.

As a result of the learning activity the student will be able to achieve the following learning outcomes:

• LO2: Select the most appropriate material and / or treatment depending on the application.
• LO4: Dimension the mechanical elements according to the given specifications.
• LO6: Write notebooks about machine and mechanism specifications.
• LO7: Use technical-scientific terminology related to mechanical systems, machines or mechanisms in different languages, especially English.

The development of the contents of the subject is based on the use of a methodology that integrates tools and methods used in professional practice. Being important for this reason to know, understand and apply the Process of Design of Machines, from the definition of the speciations to the determination of the dimensions of the element of machine. The structure used for the study of the different elements of machine is based on the knowledge of the same through his identification and description, the deduction his operation, the understanding of the theoretical development of the bases for the calculation and the calculation depending on your specifications.
The face-to-face part of the course consists of 4 hours a week of theoretical classes in the classroom (large group) and two hours, also weekly, of practical classes in laboratories (small group). In the theoretical classes, of expository and participatory character, concepts on design of elements of machines will be developed. In order to consolidate these concepts, exercises are carried out. In the laboratory practices students will work in groups of two or three people. In order to consolidate the topics worked on in the theoretical classes, in the practices works applied to elements of real machines are carried out.
During the course, students will have documentation of the topics developed in the theoretical and laboratory classes, and examples of solved exercises.
Students will have to devote additional time, non-contact, in the study, resolution of exercises, previous works and reports of the practices, as well as the preparation of the written tests.

1. JOINT ELEMENTS

• Threaded joint technology
• Welded unions
• Selection of market components

2. CALCULATION AND SIZING OF AXES AND TREES

• Theories for calculating and sizing axes and trees
• Analysis of stress concentrations
• Calculation of friction and shape joints

3. LUBRICATION OF BEARINGS AND BEARINGS

• Calculation and selection of bearings
• Description and selection of bearings
• Selection of market components

4. MECHANICAL RESOURCES

• Calculation of springs.
• Stress and strain analysis
• Selection of market components

5. GEARS

• Analysis of applications
• Types of gear breaks and calculations

The following describes the evaluative learning activities that seek to help students acquire the Learning Outcomes of the subject and the teacher to obtain evidence that students achieved in them.

Evaluation activity 1: Written partial test 1 (Ex1).

a) Description:

• Written test (exam) of evaluation of the theoretical contents and the resolution of problems developed in the subjects 1 and 2.

b) Support material:

• Notes and bibliography of the subject

c) Deliverables and links with the evaluation:

• Test resolution.
• Represents 35% of the total grade of the subject.

d) Links with Learning Outcomes:

• In the activity the evidence of having achieved the Learning results is obtained: RA2 and RA4.

Evaluation activity 2: Written partial test 2 (Ex2).

a) Description:

• Written test (exam) of evaluation of the theoretical contents and the resolution of problems developed in the subjects 3, 4 and 5.

b) Support material:

• Notes and bibliography of the subject

c) Deliverables and links with the evaluation:

• Test resolution.
• Represents 35% of the total grade of the subject.

d) Links with Learning Outcomes:

• In the activity the evidence of having achieved the Learning results is obtained: RA2 and RA4.

Evaluation activity 3: Experimental Laboratory Practices (PrE).

a) Description:

• Recognize, interpret, simulate and calculate different elements of machines.
• The activity is carried out in groups of 2-3 students in the laboratory.

b) Support material:

• Notes and bibliography of the subject.
• Internship script.
• Teaching equipment, machine tools, measuring elements, tools and laboratory and workshop consumables.

c) Deliverables and links with the evaluation:

• Practice Experiment Report as indicated in the script.
• This activity represents 20% of the final grade of the subject.

d) Links with Learning Outcomes:

• In the activity the evidence of having achieved the Learning results is obtained: RA2, RA4, RA6 and RA7.

e) Laboratory sessions:

• 7 laboratory sessions.

Evaluation activity 4: Practices of Informative Laboratories (PrD).

a) Description:

• Recognize, interpret, simulate and calculate different elements of machines.
• The activity is carried out in groups of 2-3 students in the laboratory.
• The deliverable material of the activity is a video-report of the same.

b) Support material:

• Notes and bibliography of the subject.
• Internship script.
• Teaching equipment, machine tools, measuring elements, tools and laboratory and workshop consumables.

c) Deliverables and links with the evaluation:

• Video-Practice report according to what the script indicates.
• This activity represents 10% of the final grade of the subject.

d) Links with Learning Outcomes:

• In the activity the evidence of having achieved the Learning results is obtained: RA2, RA4 and RA7.

e) Laboratory sessions:

• 3 laboratory sessions.

The calculation for the Final Grade (NF) of the subject is:

1. NF = 0,35 Ex1 + 0,35 Ex2 + 0,1 Inf + 0,2 Pr

• NF: Final Note
• Ex1: 1st Partial Examination (35%).
• Ex1: 2nd Partial Examination (35%).
• Inf: Work Report Grade (10%) = (Inf1 + Inf2 + Inf3) / 3
• Pr: Practice Notes (20%) = (P1 + P2 + P3 + P4 + P5 + P6 + P7 + P8 + P9 + P10) / 10

Clarifications:

• The minimum grade for each of the exams is 3,5. In the event that any of the grades for the Ex1 and Ex2 activities is below the minimum grade, the final grade for the subject will be limited to 4.
• Minimum mark of practices (Pr) is 4. In case the mark of Practices is below the minimum mark, the final qualification of the asignatura will remain limited to 4.
• Minimum grade of Work Report (Inf) is 4. In case the grade of Work Report is below the minimum grade, the final grade of the subject will be limited to 4.

Recovery:

• It will be possible to recover all the evaluation acts separately (1st Partial Examination, 2nd Partial Examination and Practices).

Budynas, RG, & Nisbett, JK (2021). Design in Shigley Mechanical Engineering. Mexico City: McGraw Hill.

Genovese, PA (2020). Machine Design Notes. Mataró: ESUPT Tecnocampus.

Bhandari, VB (2010). Design of Machine Elements. Nodia: Tata McGraw-Hill.

Wittel, H., Muhs, D., Jannasch, D., & Voßiek, J. (2015). Roloff / Matek Maschinenelemente - Normung, Berechnung, Gestaltung. Wiesbaden: Springer Vieweg.

Juvinall, RC, & Marshek, KM (2017). Design of machine elements. Mexico City: Limusa Wiley.

Decker, K.-H. (1980). Machine Elements. Bilbao: Urmo.