Modul

Written examination on the contents of Mechanical Design I&II

Duration: 90 min plus reading time

Preliminary examination: Successful participation in the preliminary work in the field of Mechanical Design I&II

Learning object springs:

• be able to recognize spring types and explain stress
• Identify and describe the properties of a resilient LSS in machine elements presented later on
• Understanding and explaining the principle of action
• Know and list areas of application for springs
• graphically illustrate the load and the resulting stresses
• be able to describe the degree of species usefulness as a means of lightweight construction
• be able to analyse different solution variants with regard to lightweight construction (use species efficiency)
• Being able to explain several springs as a circuit and calculate total spring stiffness

Learning objects Technical Systems:

• Being able to explain what a technical system is
• "Thinking in systems."
• Using system technology as an abstraction tool for handling complexity
• Recognizing functional relationships of technical systems
• Getting to know the concept of function
• be able to use C&C²-A as a means of system technology

Learning objects Visualization:

• Ability to create and interpret schematics
• Using freehand technical drawing as a means of communication
• To be able to apply the technical basics of freehand drawing
• Derivation of 2D representations into different perspective representations of technical structures and vice versa
• Master reading of technical drawings
• Dedicated dimensioning of technical drawings
• Create sectional views of technical systems as a technical sketch

Learning objects Bearings:

• be able to recognize bearings in machine systems and explain their basic functions
• name bearings (type/type/function) and recognize them in machine systems and technical drawings
• Being able to name areas of application and selection criteria for the various bearings and bearing arrangements and explain interrelationships
• Ability to functionally explain the design of the bearing definitions in different directions radially/axially and circumferentially
• Know and describe selection as an iterative process as an example
• be able to perform dimensioning of bearing arrangements as an example of the engineer's approach to dimensioning machine elements
• Develop first ideas for probabilities in predicting the life of machine elements
• Recognise from the damage pattern whether static or dynamic overload was the cause of material failure
• Calculate equivalent static and dynamic bearing loads from the catalogue and given external forces on the bearing
• Being able to name, explain and transfer the basic equation of the dimensioning to the bearing dimensioning

Learning objectives seals:

The students…

• can discuss the basic functions of seals
• can describe the physical causes for mass transfer
• can apply the C&C-Model on seals
• can name, describe and apply the three most important classification criteria of seals
• can explain the function of a contacting seal and a non-contacting seal.
• can differentiate the seal types and organize them to the classification criteria.
• can discuss the structure and the effect of a radial shaft seal
• can evaluate radial shaft seals, compression packings, mechanical seals, gap seals and labyrinth seals
• can describe and apply the constructional principle of selffortification
• can describe the stick-slip phenomenon during the movement sequences of a reciprocating seal

Learning design:

The students…

• understand the meaning of design
• are able to recognize and implement basic rules and principles of design
• are able to design the connection of partial systems into the total system
• can name requirements of design and take them into account
• know the main groups of manufacturing methods
• are able to explain the manufacturing processes
• are able to depict a casted design in a drawing clearly, e.g. draft of the mold, no material accumulation, …
• know how  components are designed
• Know how the production of the components has an effect on
• their design
• Know the requirements and boundary conditions on design

Learning bolted connections:

The students…

• can list and explain various bolt applications.
• can recognize bolt types and explain their function
• can build a C&C² model of a bolted joint and discuss the influences on its function
• can explain the function of a bolted connection with the help of a spring model
• can reproduce, apply and discuss the screw equation.
• Can estimate the load-bearing capacity of low-loaded bolted joints for dimensioning purposes
• Can indicate which bolted joint is to be calculated and which only roughly dimensioned.
• Can carry out the dimensioning of bolted connections as flange connections
• Can create, explain and discuss the force deflection diagram of a bolted connection

None

MKL I:

Introduction to product development

Tools for visualization (technical drawing)

Product creation as a problem solution

Technical Systems Product Development

• Systems theorie
• Contact and Channel Approach C&C²-A

Basics of selected construction and machine elements

• Federn
• bearings and fence
• sealings

The lecture is accompanied by exercises with the following content:

gear workshop

Tools for visualization (technical drawing)

Technical Systems Product Development

• Systemtheorie
• Contact amd Channel Approach C&C²-A

Exercises for springs

Exercises for bearings and fence

MKL II:

• sealings
• design
• dimensioning
• component connections
• bolts

An in-depth study of machine design (parts 3 + 4) can be carried out as part of the "Extracurricular Module in Engineering". 

MKL1: 

presence: 33,5 h

Attendance in lectures: 15 * 1.5 h = 22.5 h

Presence in exercises: 8 * 1.5 h = 12 h

self-study: 56,5 h

Personal preparation and wrap-up of lecture and exercises including the processing of the test certificates and preparation for the exam: 56.5 h

Total: 90 h = 3 LP

MKL2: 

Presence: 33 h

Attendance in lectures: 15 * 1.5 h = 22.5 h

Presence in exercises: 7 * 1.5 h = 10.5 h

Self study: 87 h

Personal preparation and wrap-up of lectures and exercises, including the processing of the test certificates and preparation for the exam: 87h

Total: 150 h = 5 LP

Additional expenditure for degree programs from other disciplines MKL1 + MKL2 in total: 30 h = 1 LP

Lecture

Tutorial

Project work during the semester

Online-test