Domande d'esame VERIFICATO
esame gennaio 2021
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The document is a comprehensive exercise for engineering students focusing on technical representation. It includes:
- Detailed engineering drawings of two distinct mechanical components:
- A complex part with multiple views (principal, section A-A) showing dimensions, radii, and surface roughness indicators (Ra 6.3, Ra 1.6, Ra 0.8).
- A shaft assembly incorporating a bearing, illustrating axial fixation methods and specific tolerances (Ø 21 H7/h6).
- A set of 7 questions directly related to the first drawing, prompting students to:
- Determine various critical dimensions and their maximum/minimum values.
- Analyze the spatial relationship between specified surfaces (4/1 and 4/2) and calculate their distance.
- Identify the maximum permissible average arithmetic roughness for a given surface.
- Interpret and describe the meaning of specific technical symbols present on the drawing.
- An additional set of 7 questions (8-14) covering the second drawing and general principles:
- Determine tolerance types and actual values for a shaft coupling, referencing provided tables.
- Design a sleeve with a medium interference fit, requiring knowledge of tolerance systems.
- Identify the number and type of rolling elements in the bearing assembly.
- Explain the axial fixation methods for both the outer and inner races of the bearing, as well as the overall bearing assembly.
- Identify any visible anti-rotation devices.
- Extensive tables providing numerical values for roughness (Ra in µm) and dimensional tolerances for holes (H7, H8, H9, H10, H11) and shafts (h6, h7, h8, h9, h10, h11) across various nominal diameters, crucial for solving tolerance-related problems.
- Instructions for a drafting task: "Disegnare a mano libera su carta bianca formato A2 l'oggetto rappresentato ricopiando le rappresentazioni date e completando con le viste e i tagli richiesti, tutto senza linee nascoste." (Draw freehand on A2 white paper the represented object, copying the given representations and completing with required views and sections, all without hidden lines).