Engineering Assessment Answer
Assignment Task:
Compression testing is frequently done to a specific limit or to a break (rupture). Depending on the type of material being tested, break detection can be defined when the test is performed to a break. If the test is performed to a specific limit, either a load limit or deflection limit is used. Almost all materials can experience compressive forces in one way or another depending upon their application, but the most common materials are composites, concretes, wood, stone, brick, mortars, grouts, polymers, plastics, foam, and metals among many others.
For this coursework [2], you are required to design a power screw system for a compression testing machine. Employing the application of power screw(s), shaft(s), gears and their respective control systems. The machine power screw must be run using an electromotor and gearbox.
Applying sound engineering principles, you are required to propose an effective means of applying torque from an electromotor to the moving power screw and produce the required force.
1.2 Technical specifications
- The function of the product is to drive a compression test on standardized specimen up to 50 kN loaded forces.
- The temperature range during operation is between +10 and +35°C.
- The humidity will range from 10 to 90% (non-condensing).
- The conception must take into consideration the easiest feasibility to manufacture each part of the machine and by this way reduce the cost as far as it is possible.
- The desired service life is 15 years
- Size: 2500 x 2000 x 3000 mm
- Distance between compression plate: Minimum 300 mm
- Upper/lower compression plate dimensions: Minimum diameter 800 mm
- The Max force at full speed must be 50 kN. & Max load speed is 150 mm / min
- Tolerances and surface finishes must be specified as far as it is needed for the design to achieve suitable product quality. The power screw used for this application should be self-locking.
- The transmission must accommodate any type of Bevel, Spur or Helical gears but not Worm gears.
1.3 Expected outcomes
- Material selection using CES for a power screw.
- Design analysis of a power screw.
- Selection of electromechanical components.
- Show cognitive skills with respect to modelling and simplifying real problems.
- Optimization of mechanical design.
- Computer-aided drawing of the power screw
- A formal report of the design process.
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