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Mechanical Engineering

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Apr 3, 2024

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Abie Bonkovski EML2322L Spring 24’ 2-16-2024 Design Description: Among recent times, slicing onions has been a controversial topic for the average and inexperienced home cook. With the risk of injury, in addition to the ‘guarantee’ of crying, many have shied away from slicing onions, and perhaps other vegetables as well. An invention to avoid slicing onions would be both efficient and would require less energy in meal preparation for the average cook. As seen in the drawings, this assembly will be a complete extension of the pre-existing air engine, including 6 OTS components and 7 machined parts, with the extended base being a combination of two different machined parts made of two different metals. The aluminum and steel extended base (1) will support all other parts of the assembly, allowing it to fully function without external support holding it up. The carbon steel gliding food platform (2) will be supporting the onion and can be arranged to a closer or farther distance depending on the size of the onion. This gliding food platform will ‘float’ due to its connection with steel linear bearings (6). These linear bearings will glide across steel rods (8) that are threaded from both internal sides of the extended base, that is screwed down to the aluminum sheet. The aluminum scotch yoke axle (3) will be responsible for transferring the circular motion of the flywheel and converting it into linear motion so that the onion will be julienned back and forth. This circular motion is transferred into linear motion by connecting the scotch yoke to the screw, which will go back and forth as the screw displaces. Connected to the axle, there will be a threaded steel connector (4) and steel connector holder (5) that work in unison to keep the threaded steel blade height setting selector (7) upright. The blade height setting selector is an essential piece behind the motive of the design. When julienning the onion, the blade must sequentially decrease in height to account for the height decrease of the onion. The last aspect of the assembly will be how the ceramic blade (9) is held from the blade height setting selector. There will be a steel blade handle (10), which will connect to the blade through the usage of a round top screw and nut. All in all, these components amount to less than $75, sitting at a price of $66.30. As seen in the drawings, this design has many moving parts that all assemble to form an efficient machine responsible for julienning onions. Thanks to the ceramic blade, it will be low maintenance and will require sharpening 11.2 times less than the average stainless-steel blade. The molecular structure of zirconium oxide allows for a clean slice of the vegetable without the degradation of the blade edge. Certain off-the-shelf components will be further elaborated upon in the MIR of the assembly.

MIR Specification Table:

Concept Sketches:

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