Reference no: EM133254063
Machine Design
LO1. Design and analyse mechanical system using mechanical components with a detail material selection on the components used in the design based on calculations.
Introduction
Load carrying mechanism is widely used in the industry and construction area. Examples are cranes, ASRS, AGVs, robots and many more. Using mechanism to carry load is much more efficient and fast compare to the manual way of doing it. By using the right mechanism it is possible to design an efficient load carrying system.
Objective
In this assignment you have to develop a system to carry the load from one point to another. Develop your design using all possible mechanisms. Analyse the system developed by showing all calculations in relation to the mechanisms used in your system. Based on the calculation done a detail material selection of actuators must be done. Your system must be a fully automated system however this element is not important for the system analysis.
Your system should consist of three different types of motion conversions using different mechanical components such as linear, rotary, reciprocating or intermittent motion. These motions should be developed using any mechanical component such as power screw, bearings, pulleys, belts, gears, shaft and etc.
Your system should be built under the following criteria:
1) The system must have at least three different mechanisms with three different motion conversions. (Example: Linear to Linear, Rotation to Rotation, Linear to Rotation, Rotation to Linear, Rotation to Reciprocating, Rotation to Intermittent and etc.)
2) You are not allowed to use the same mechanisms in your designs except for pneumatic and hydraulic actuators which are allowed only twice.
3) Design must include the use of bearings to reduce stress on joints and fixtures. Proper bearings must be used for each joint.
4) Design must show proper usage of mechanical components such as gears, belts, power screws and etc.
5) Design must show proper usage of actuators such as motors, gears, bearings, power screw, pneumatic or hydraulic cylinders. Selection must be done after design calculation is done.
6) Cam shaft, Crank shaft and piston can be only used is you understand the system well.
7) The whole design must have a safety factor of 4
Calculation
1) Analyse the system via calculation to show how these different mechanisms are moved and to achieve the total movement in the system you have designed.
2) Calculation should be done to show the forces in the mechanism when a 12 kg load is applied. A suitable design should be given to overcome this load.
What You Have to Do
Concept Design
Select two feasible innovative design solutions and provide detailed hand sketches (redraw the approved designs) and not scanned copies. Explain each of the design and also explain the reasons for the choice of design. Both designs must use different mechanical components to achieve the given task. All part of your system must be labeled and explained briefly.
Embodiment Design
3D Development of Design
Provide detailed 3D drawings using any CAD software for your chosen design and examine how the various functions will be accomplished with detail explanation of the system.
Calculations
Provide detailed analysis via calculations to demonstrate that your device will be able to work safely. Provide drawings and written annotation to clearly explain each section of your work. Be sure to provide the correct units at each stage and also provide suitable conclusions to each stage of the work.
Material selection
Based on the analysis via calculation the design must show proper usage of actuators such as motors, pneumatic or hydraulic cylinders. Selection of the real actuator with data sheet should be based on the calculation done. Full data sheet for chosen material selection should be attached in the appendix.
Discussion and Conclusion (LO4 - PO5, C4)
A mature discussion of observations/findings and a concise conclusion with related to the design.
One to One Presentation
Prepare and present an overview of the report. The presentation will last approximately 15 minutes followed by a five minutes where you will be expected to answer questions relating to the report / presentation. The presentation will be given in a professional manner.
Scheduled Check Points
The marking will be done progressively. You are required to submit each element (from a to f) within a given period. Failure to do so will be awarded zero mark for that specific element. Table 1 shows the submission week for each element.