Chapter 11: Problem 15

List four situations in which casting is the preferred fabrication technique.

Short Answer

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Question: List four specific situations where casting is the superior choice for the fabrication process.

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Situation 1: Complex Internal Geometries

The casting method allows for the creation of extremely complex internal geometries that can't be easily achieved through machining or forging techniques. The molten metal is poured into a hollow mold cavity with intricate internal shapes, producing a part that requires little to no post-processing. In this situation, casting is the preferred fabrication technique because it's more efficient and cost-effective than other methods.

Situation 2: Producing Large or Irregularly Shaped Components

Casting is an excellent technique for manufacturing large or irregularly shaped parts that can't be easily produced using other methods like machining or additive manufacturing. Because casting uses molds and molten metal, it can create components of any shape or size, including large industrial castings. In this case, casting is the best fabrication technique due to its ability to accommodate a wide range of shapes and sizes.

Situation 3: Creating Parts with High Surface Finish

Casting can produce parts with high surface finish, often eliminating the need for additional post-processing steps like grinding or polishing. This is especially true when using fine-grained molding materials such as investment casting or die casting. As a result, casting is the preferred fabrication technique for parts that require a high surface finish right out of the mold.

Situation 4: Producing Near-Net-Shape Parts

Casting is an advantageous fabrication technique for situations where near-net-shape (NNS) components are desired, which significantly reduces the need for additional machining operations. NNS parts are very close to their final shape and require little to no post-processing, resulting in significant cost and time savings. Examples of processes that produce near-net-shape components include investment casting, pressure die casting, and squeeze casting. In these scenarios, casting is the preferred fabrication technique because it provides significant benefits over other methods like forging or machining.

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List four situations in which casting is the preferred fabrication technique.

Short Answer

Step by step solution

Situation 1: Complex Internal Geometries

Situation 2: Producing Large or Irregularly Shaped Components

Situation 3: Creating Parts with High Surface Finish

Situation 4: Producing Near-Net-Shape Parts

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