How to draw tolerance zones using data of tables of tolerances and fundamental deviations. Seminar 4

Август 13, 2022

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How to draw tolerance zones using data of tables of tolerances and fundamental deviations. Seminar 4

Содержание

2. Step 1: Recall what we know about tolerance zones it has lower and upper boundaries it
3. Step 2: Tolerance zone over zero line
4. Step 3: Example with table data Ø50k6 nominal dimension quality class fundamental deviation quality class =6
5. Step 4: Fundamental deviation table for shaft
6. Step 5: Tolerance table
7. Step 6: Drawing shaft zone
8. Step 7: Find table data for the hole It is needed to define value of tolerance
9. Step 8: Using table for holes
10. Step 9: Symmetrical zone It is needed to define fundamental deviation for Ø28js7 nominal dimension quality
11. Step 10: Using table
12. Step 11: Draw the zone
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Step 1: Recall what we know about tolerance zones
it has lower

and upper boundaries
it has height of rectangular = tolerance
it can be over / under and symmetrically about zero line

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Step 2: Tolerance zone over zero line

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Step 3: Example with table data
Ø50k6
nominal dimension quality class
fundamental deviation
quality class

=6 – so it from 3 to 7 than look through the table (ei=+2μm)
IT6= 16μm (micrometers)

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Step 4: Fundamental deviation table for shaft

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Step 5: Tolerance table

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Step 6: Drawing shaft zone

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Step 7: Find table data for the hole
It is needed to

define value of tolerance for
Ø25H7
nominal dimension quality class
IT-? fundamental deviation - ?

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Step 8: Using table for holes

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Step 9: Symmetrical zone
It is needed to define fundamental deviation for

Ø28js7
nominal dimension quality class
fundamental deviation of symmetrical zone
The rule is that fundamental deviations of js:
es=ei = ±Td/2= ±10.5μm

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Step 10: Using table

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Step 11: Draw the zone