Sheet Metal Forming — Name the Operation That Produces Cup-Shaped Parts In manufacturing of thin sheet components, which process forms a flat blank into a seamless, cup-like shape by bending accompanied by plastic flow of metal under a punch and die?

Introduction / Context:
Cup-shaped components such as cans, shells, and housings are widely produced from sheet metal. Identifying the correct forming process is essential for selecting tooling, clearances, lubrication, and press capacity. This question targets the fundamental concept behind creating deep cups from flat blanks.

Given Data / Assumptions:

• Starting workpiece is a flat sheet metal blank.
• Final geometry is a seamless cup (no joints), formed under a punch into a die cavity.
• Material undergoes plastic deformation and controlled bending/unbending at the die radius.

Concept / Approach:
The operation that converts a flat circular blank into a cup by plastic flow with minimal thickness change is called deep drawing (commonly shortened to drawing in press-work). Material flows radially inward while being restrained by a blank-holder to avoid wrinkling. Unlike forging or extrusion, drawing is a sheet process with mainly membrane stresses and limited through-thickness compression.

Step-by-Step Solution:
Recognize a seamless cup from a flat blank → characteristic of drawing (deep drawing).Note material flow: radial inflow under a blank-holder, bending over die radius, then wall formation under the punch.Distinguish from other processes: squeezing/coining are bulk/precision compressive operations; planishing smooths surfaces with light blows.Therefore, the correct process name is drawing.

Verification / Alternative check:
Design rules for drawing specify limits such as drawing ratio and need for redraws; these are not applicable to squeezing or coining of bulk forms.

Why Other Options Are Wrong:
Squeezing: compresses bulk metal; not a sheet cup-forming operation.Coining: very high-pressure precision embossing; negligible metal flow forming a cup.Planishing: finishing/smoothing, not primary shape formation.Extruding: pushes metal through a die opening; typical for rods/tubes, not cups from sheets.

Common Pitfalls:
Confusing deep drawing with stretching; drawing aims to preserve thickness, stretching thins the sheet significantly.

Final Answer:
drawing