ASSIGNMENT 13.1
QUESTION :
Classify the following manufacturing processes as to whether they
are shape-replication or shape-generative:
(a)Honing the bore of a cylinder,
(b)Powder metallurgy gear,
(c)Rough turning a cast roll,
(d)Extrusion of vinyl house
siding.
ANSWER:
Shape replication is an example of process under mass conserving which the part replicates the information stored in the tooling by being forced to assume the shape of the surface of the tool cavity. The examples of shape-replication process can be define by the process of casting, injection molding, and closed-die forging. In addition, during mass reducing processes or shape-generation processes, the starting material is greater than the mass of the final part. This is because the part shape is produced by the relative motion between the tool and the workpiece. The examples manufacturing processes that undergo through this process is milling and drilling.
The manufacturing processes are classified as follow:
(a)
Honing the bore of a cylinder
*Shape-generation
(b)
Powder metallurgy gear
*Shape- replication
(c)
Rough turning a cast roll
*Shape-generation
(d)
Extrusion of vinyl house siding
*Shape-replication
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