ME2106 Theory of Machines and CADD Assignment Sample NUIG Ireland

ME2106 Theory of Machines and CADD is a course that covers the principles of mechanics and the use of computers in engineering design. The course begins with an introduction to mechanics, where students learn about force, motion, energy, and equilibrium. This is followed by an introduction to CAD (Computer-Aided Design), where students learn how to use computers to create models of mechanical systems.

The course concludes with a study of machines, including gears, belts, chains, brakes, and clutches. Students also learn how to use computer software to analyze the performance of mechanical systems. Overall, ME2106 provides students with a strong foundation in mechanics and CAD design that can be used in any field of engineering.

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In this section, we are describing some assigned tasks. These are:

Assignment Task 1: To demonstrate advanced skills in engineering drawing covering drawing techniques and conventions, enabling them to read, interpret and create production drawings, convert conceptual designs to working engineering drawings, and correctly integrate the use of standard and library components in their drawings, and designs.

To create production drawings that are accurate and unambiguous, engineers must follow certain conventions and techniques when drafting. By understanding the following concepts, engineers will be able to produce drawings that are easy to interpret and manufacture.

The most common type of engineering drawing is the orthographic projection. Orthographic projections are used to represent a 3-dimensional object on a 2-dimensional surface. There are six basic views of an object that can be created using orthographic projection: front view, back view, top view, bottom view, left side view, and right side view. In addition, engineers often use isometric projection drawings to show three-dimensional objects from a different perspective.

When creating orthographic projections, it is important to use the first angle method. In this method, the object is projected onto the XY plane, and the views are created by projecting the object onto the YZ and XZ planes. This method is used in most countries except for the United States, where the third angle method is used. In the third angle method, the object is projected onto the YZ plane, and the views are created by projecting the object onto the XY and XZ planes.

Once the views have been created, they must be arranged on the drawing sheet in a standard format. The front view is always drawn first, followed by the top view, bottom view, left side view, and right side view. The views should be arranged so that they are evenly spaced and aligned with each other.

Each view must also be labelled with a view identifier, which is typically a letter or number. The front view is always labelled with the letter “F”, while the other views are labelled with their respective letters (B, T, L, R).

After the views have been created and labelled, dimensions must be added to the drawing. Dimensions are used to specify the size and location of the object’s features. They are typically added using lines, arrows, and text.

Once the dimensions have been added, the drawing is complete. However, it is often helpful to add notes to the drawing to provide additional information about the object. These notes can be used to specify the materials that are to be used, the tolerances that are to be met, and any special finishing requirements.

When creating engineering drawings, it is important to follow the standards that have been established by professional organizations. The two most common standards are the American Society of Mechanical Engineers (ASME) and the International Standards Organization (ISO).

Both ASME and ISO have established standards for the size, spacing, and arrangement of views on engineering drawings. In addition, they have established standards for the type and size of lines that are to be used, the symbols that are to be used, and the abbreviations that are to be used.

It is important to note that there are many different types of engineering drawings, and each type has its own set of standards. For example, architectural drawings have their own set of standards that are different from the standards that are used for mechanical engineering drawings.

Assignment Task 2: Exhibit engineering skills developed through a self-directed group project.

When working on a self-directed group project, it is important to showcase your engineering skills to prove your capabilities. One way to do this is by documenting everything you do throughout the process, from brainstorming to implementation. This will not only show off your problem-solving abilities but also demonstrate how you work within a team.

Additionally, try to take on as many roles as possible during the project – this will versatility and adaptability, two key qualities any employer is looking for. Finally, don’t hesitate to ask for help when needed; admitting that you need assistance shows that you are willing to learn and improve. By exhibiting these skills, you will be sure to impress anyone who reviews your project.

Assignment Task 3: Complete a risk assessment in respect of the product, service, or system that has been created as part of their project activity taking into account the environmental aspects as well as the safety, health, and welfare of end-users, and workers, etc.

When completing a risk assessment, it is important to take into account all potential risks, including those that may not be immediately apparent. For example, when creating a new product, it is important to consider the environmental impacts of the materials used and the disposal of the product once it has reached the end of its life. Additionally, you must consider the safety of the workers who will be involved in its production, as well as the health and welfare of the end-users. Only by taking all potential risks into account can you create a comprehensive risk assessment.

Assignment Task 4: Exhibit a good knowledge of mechanism terminology and description of basic mechanisms and their applications, derive and analyze degrees of freedom and mobility in planar and 3d systems, and kinematic analysis of basic mechanisms such as slider-crank and 4-bar linkage-type mechanisms using analytical, vector and instant-centre graphical techniques, standard shaft couplings and universal and constant velocity joints.

Kinematic analysis is the study of the motion of objects without taking into account the forces that cause the motion. To carry out a kinematic analysis, you must first understand the basic terms and concepts associated with motion. For example, you must be able to identify the different types of motion, such as linear motion and rotational motion. Additionally, you must be able to describe the different types of mechanisms, such as slider-crank mechanisms and 4-bar linkage mechanisms.

Once you have a good understanding of the basic concepts, you can then begin to carry out a kinematic analysis of simple mechanisms. Several methods can be used for this purpose, including analytical methods, vector methods, and instant-centre methods. Each of these methods has its advantages and disadvantages, so it is important to choose the best method for the particular problem you are trying to solve.

After carrying out a kinematic analysis of a mechanism, you should be able to derive the degrees of freedom and mobility of the system. The degrees of freedom of a system tell you how many independent motions the system is capable of. The mobility of a system tells you how many different ways the system can move.

Finally, you should also be familiar with the different types of shaft couplings and universal joints that are used to connect mechanisms. These include standard shaft couplings, such as the Lovejoy coupling, and constant velocity joints, such as the CV joint. Each of these has its advantages and disadvantages, so it is important to choose the best type of coupling for the particular application.

Assignment Task 5: Analyse static forces in basic mechanisms in static equilibrium and develop free-body diagrams, and mechanical advantage analysis on common mechanical systems such as gear trains, pulley and belt systems, levers, and basic mechanisms.

When carrying out a static analysis of a mechanism, the first thing you need to do is to identify all of the forces that are acting on the system. These forces can be divided into two categories: external forces and internal forces. External forces are those that act on the system from outside, such as gravity or friction. Internal forces are those that are generated within the system, such as the forces between the gears in a gear train.

Once you have identified all of the forces acting on the system, you need to create a free-body diagram. This is a graphical representation of the system that shows all of the forces acting on it. Each force is represented by an arrow, with the direction of the arrow indicating the direction of the force.

After you have created the free-body diagram, you can then begin to analyze the forces acting on the system. This is known as a force analysis. The first step in this process is to determine the sum of all of the forces acting on the system. This is known as the resultant force. The resultant force is the vector sum of all of the individual forces acting on the system.

Once you have determined the resultant force, you can then begin to analyze the different types of forces acting on the system. The most common type of force is linear force, which is a force that acts in a straight line. Another type of force is a rotational force, which is a force that acts in a circular motion. Finally, there is also a gravitational force, which is the force exerted by gravity on the system.

After you have analyzed the different types of forces acting on the system, you can then begin to calculate the mechanical advantage of the system. The mechanical advantage is the ratio of the output force to the input force. The output force is the force exerted by the system on its surroundings, and the input force is the force exerted by the surroundings on the system.

There are three main types of mechanical advantage: mechanical advantage, velocity ratio, and efficiency. Mechanical advantage is the ratio of the output force to the input force. Velocity ratio is the ratio of the output speed to the input speed. Efficiency is the ratio of the output power to the input power.

Assignment Task 6: Explain aspects of cam design including cam and follower displacement, velocity, acceleration, and jerk diagrams using constant velocity, parabolic, harmonic and cycloidal functions.

There are several aspects of cam design that must be considered to create an efficient and effective mechanism. The first is a displacement or the distance the follower moves about the cam. The second is velocity or the speed at which the follower moves. The third is acceleration, or how quickly the velocity changes. Finally, jerk is a measure of how quickly the acceleration changes.

Each of these aspects can be represented using a diagram known as a timing chart. This shows how each variable changes over time about one. By understanding these relationships, it is possible to create cams with various desired characteristics.

For example, a constant velocity cam would have a uniform displacement and velocity throughout its cycle. This would result in a smooth, consistent motion. A parabolic cam would have a displacement that increases and then decreases over time. This would result in acceleration and deceleration of the follower. A harmonic cam would have a displacement that oscillates between two points. This would result in an alternating acceleration and deceleration of the follower. Finally, a cycloidal cam would have a displacement that follows a circular path. This would result in a constant acceleration of the follower.

Each type of cam has its advantages and disadvantages. Constant velocity cams are simple to design and manufacture, but they are not very efficient. Parabolic cams are more efficient, but they are more difficult to design and manufacture. Harmonic cams are even more efficient, but they are very difficult to design and manufacture. Cycloidal cams are the most efficient, but they are nearly impossible to design and manufacture.

It is important to select the right type of cam for the desired application. If efficiency is the primary concern, then a cycloidal cam should be used. If simplicity is the primary concern, then a constant velocity cam should be used. If both efficiency and simplicity are important, then a parabolic or harmonic cam should be used.

Assignment Task 7: Demonstrate an understanding of the basics of conjugate surfaces, as used in constant velocity direct contact devices, and involute gear tooth design and can analyze basic gear tooth layouts, and can do basic kinematic analysis, design, and analysis of simple, compound and planetary gear trains.

Conjugate surfaces are used in constant velocity direct contact devices to ensure that the two surfaces remain in contact with each other at all times. This is necessary to prevent the device from slipping or skidding. The most common type of conjugate surface is the involute gear tooth. This is a gear tooth that has a spiral shape.

To design and analyze gear teeth, it is necessary to understand the basics of kinematics. Kinematics is the study of motion without regard for the forces that cause it. This means that kinematic analysis can be used to determine the motion of objects without knowing the details of the forces involved.

Gear trains are devices that use gears to transfer motion between two or more shafts. The most common type of gear train is the simple gear train. This is a gear train that has only one gear on each shaft. The compound gear train is a gear train that has two or more gears on each shaft. The planetary gear train is a gear train that has three or more gears on each shaft.

Assignment Task 8: Analytically correct imbalances in rotating shafts and rotors.

Rotating shafts and rotors are often subject to imbalances, which can lead to serious problems. Balancing is the process of correcting these imbalances, and it is important to do it correctly to avoid potential catastrophic failures.

There are two main types of balancing: static and dynamic. Static balancing is concerned with correcting the balance of the rotating assembly at rest, while dynamic balancing is concerned with correcting the rotation imbalance of the assembly while it is in operation.

The most common method of static balance correction is known as profile grinding. This involves machining slots or depressions into the heavy areas of the rotor or shaft so that they are lighter and thus more balanced. Another method, known as a counterweight, involves adding weights to the heavy areas to balance them out.

Dynamic balancing is a more complex process, and it generally requires the use of special equipment. The most common method of dynamic balancing is known as the half-split method. This involves dividing the rotor or shaft into two halves and then balancing each half separately. Once both halves are balanced, they are rejoined and the assembly is complete.

Another method of dynamic balancing is known as the single-plane method. This involves balancing the rotor or shaft in only one plane. This is generally done by adding weights to the heavy areas to balance them out.

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