02. surface characteristics
TRANSCRIPT
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1. PART AND ASSEMBLY DRAWINGS
2. SURFACE CHARACTERISTICS
3. DIMENSIONAL TOLERANCES
4. FITS
5. GEOMETRIC TOLERANCES
6. DIMENSIONING
7. THREADED FASTENING
8. SHAFT AND PIPE JOINERS
9. BEARINGS
10. GEARS 1: DEFINITION
11. GEARS 2: HELICAL
12. GEARS 3: BEVEL
13. BELTS AND CHAINS
14. WELDED JOINTS AND RIVETS
2. SURFACE CHARACTERISTICS
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
It is quite convenient to check the ISO 1302:2002 standard to understand completely this lesson
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
We know all materials have some roughness and waviness
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Waviness and roughness are not the same thing
Waviness Roughness
Waviness Roughness
Waviness Roughness
Waviness Roughness
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Roughness height is one of major parameters for quantification of surface roughness. There exist different patterns for defining roughness height.
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Ra: Average roughness index or height (more common). It is the height obtained dividing the area between the
roughness profile and the mean line by the evaluation length.
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Rz: Mean peak-to-valley index. The distance of highest peak to deepest valley of a sample length is termed as peak-to-valley distance. Measure this peak-to valley
for five successive equal sample length to obtain Rz
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Different manufacturing processes yields different amount of roughness on the surface
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Basically the finer the finish and the tigher the tolerance the greater the cost. Ideally from a cost impact point of view ir is best for the designer to accept the finish and tolerance capability of the primary process.
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Basic graphical symbol No specification
Name: APA (any process allowed)
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Basic graphical symbol for surfaces that require
machining Name: MRR (material
removal required)
Basic graphical symbol Removal of material prohibited from the
surface Name: NMR (no material
removal)
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Profile parameters
16%-rule Max rule
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Surface lay orientation
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material
Examples…
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Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit
Examples…
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Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning ü Roughness mean peak-to-valley: 3,2 µ
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning ü Roughness mean peak-to-valley: 3,2 µ ü 16%-rule (default)
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning ü Roughness mean peak-to-valley: 3,2 µ ü 16%-rule (default) ü Default filter window
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning ü Roughness mean peak-to-valley: 3,2 µ ü 16%-rule (default) ü Default filter window ü Parallel orientation
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Machining process: turning ü Roughness mean peak-to-valley: 3,2 µ ü 16%-rule (default) ü Default filter window ü Parallel orientation ü Evaluation length of 5 sampling length (default)
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
ü Process shall remove material ü Unilateral upper specification limit ü Filter window: 0,008-0,8 mm ü Roughness: Rz=3,2 µ ü 16%-rule (default) ü Evaluation length of 5 sampling length
(default)
ü Process shall remove material ü Double-sided upper and lower
specification limits ü Machining process: turning ü Upper limit: Roughness: Ra=0,8 µ (16%-
rule) ü Lower limit: Roughness: Ra=0,2 µ (16%-
rule) ü Default filter window ü Evaluation length of 5 sampling length
(default)
Examples…
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
You can find different symbols that have changed throughout time
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Same surface texture on any surface of the part
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Same surface texture on any surface of the part (different indication)
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Same surface texture …except in two faces
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Alternative use of leader lines
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
The general rule is that the graphical symbol together with the complementary information shall be oriented so that they can be read from the bottom or right-hand side of the drawing, in conformity with ISO 129
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
Autodesk Inventor allows you to include the symbol in your drawings (Annotate tab)
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SURFACE CHARACTERISTICS INTRODUCTION | SYMBOLS | DRAWINGS
Industrial Drawing 2015 Ramón Rubio
http://www.ted.com/talks/katherine_kuchenbecker_the_technology_of_touch
Time to watch a TED talk related to the technology of touch
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1. PART AND ASSEMBLY DRAWINGS
2. SURFACE CHARACTERISTICS
3. DIMENSIONAL TOLERANCES
4. FITS
5. GEOMETRIC TOLERANCES
6. DIMENSIONING
7. THREADED FASTENING
8. SHAFT AND PIPE JOINERS
9. BEARINGS
10. GEARS 1: DEFINITION
11. GEARS 2: HELICAL
12. GEARS 3: BEVEL
13. BELTS AND CHAINS
14. WELDED JOINTS AND RIVETS
2. SURFACE CHARACTERISTICS