Working drawings terminology: In manufacturing documentation, are 'detail drawings' commonly referred to as 'piece-part drawings,' meaning they fully define one individual component so it can be fabricated and inspected without needing other sheets?

Difficulty: Easy

Correct Answer: Correct

Explanation:


Introduction / Context:
Detail drawings (often called piece-part drawings) are the backbone of working drawings. They communicate everything a machinist, fabricator, or inspector needs to make and verify a single component without referencing other documents. Understanding this terminology helps drafters organize drawing sets properly and avoid ambiguity during production.



Given Data / Assumptions:

  • The topic concerns standard mechanical working drawings used for manufacturing.
  • “Detail drawing” describes a drawing of one part, not an assembly.
  • Industry practice expects complete definition on the detail sheet: geometry, material, finish, and tolerances.


Concept / Approach:
A piece-part (detail) drawing should be self-sufficient. It contains orthographic and/or section views, dimensions, tolerances, material and heat-treat notes, surface finish, revision history, and any special processes. This completeness lets the part be manufactured and inspected independently, then later combined using an assembly drawing and bill of materials.



Step-by-Step Solution:

Identify the drawing type: if it describes one component only, it is a detail (piece-part) drawing.Verify completeness: geometry, dimensions, tolerances, notes, and title block information must enable standalone manufacture.Confirm no dependence on other sheets for basic size or form; references are allowed for standards but not for missing definition.Relate the detail drawing to assembly via a part number that appears in the bill of materials.


Verification / Alternative check:
In a typical project set, assemblies show how parts fit together, while detail drawings provide exact specifications per part. Shop routing and inspection plans rely on these single-part sheets, confirming the equivalence of “detail drawing” and “piece-part drawing.”



Why Other Options Are Wrong:

Incorrect: Conflicts with standard drafting terminology.Only for sheet-metal parts: The term applies across materials and processes.Only when an assembly exists: Detail drawings exist regardless of whether an assembly drawing is issued at the same time.


Common Pitfalls:
Leaving critical tolerances off the detail; forcing the shop to read an assembly just to interpret a single part; scattering requirements across multiple sheets.


Final Answer:
Correct

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