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GB/T 3478.5-2008 English PDF (GBT3478.5-2008)

GB/T 3478.5-2008 English PDF (GBT3478.5-2008)

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GB/T 3478.5-2008: Straight cylindrical involute splines -- Metric module, side fit -- Part 5: Inspection
GB/T 3478.5-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 21.120.30
J 18
Replacing GB/T 3478.5-1995
Straight cylindrical involute splines -
Metric module, side fit - Part 5: Inspection
(ISO 4156-3:2005, Straight cylindrical involute splines -
Metric module, side fit - Part 3: Inspection, MOD)
ISSUED ON: SEPTEMBER 22, 2008
IMPLEMENTED ON: MAY 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Standard temperature ... 6 
4 Inspection of major diameter and minor diameter of spline ... 6 
5 Inspection of the space width of internal spline, tooth thickness of external
spline, diameter of involute end circle, diameter of involute starting circle ... 6 
6 Selection and labeling of inspection methods ... 15 
Appendix A (Normative) Gauges ... 18 
Foreword
GB/T 3478 “Straight cylindrical involute splines - Metric module, side fit” is
divided into 9 parts:
- Part 1: Generalities;
- Part 2: 30° pressure angle dimensions tables;
- Part 3: 37.5° pressure angle dimensions tables;
- Part 4: 45° pressure angle dimensions tables;
- Part 5: Inspection;
- Part 6: 30° pressure angle M and W values;
- Part 7: 37.5° pressure angle M and W values;
- Part 8: 45° pressure angle M and W values;
- Part 9: Measuring pin.
This part is the part 5 of GB/T 3478.
This part modifies and adopts ISO 4156-3:2005 “Straight cylindrical involute
splines - Metric module, side fit - Part 3: Inspection”. The main differences are
as follows:
- Respectively INCLUDE the calculation of the diameter of the measuring bar
DRi and DRe in clause 8.5, the calculation of pin spacing MRi and cross-pin
distance MRe in clause 8.6, the calculation of the average length W of the
common nominal line of the external spline in clause 9 of ISO 4156-3:2005
into part 6, part 7, part 8 of GB/T 3478;
- MOVE the gauge design part of clause 10 of ISO 4156-3:2005 into
Appendix A;
- ADD the one-way test method;
- ADD the analytical inspection; INCLUDE the appendix (indexing error
analysis) of ISO 4156-3:2005 into clause 5.4.
This part is a revision of GB/T 3478.5-1995 “Straight cylindrical involute splines
- Inspection methods”.
The main differences between this part and GB/T 3478.5-1995 are as follows:
Straight cylindrical involute splines -
Metric module, side fit - Part 5: Inspection
1 Scope
This part of GB/T 3478 specifies the test method for the straight cylindrical
involute splines.
This part is applicable to the inspection of splines manufactured according to
GB/T 3478.1. It may also be used as a reference when using the gauge to
inspect the straight cylindrical involute splines.
2 Normative references
The provisions in following documents become the provisions of this part
through reference in this part of GB/T 3478. For the dated references, the
subsequent amendments (excluding corrections) or revisions do not apply to
this part; however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 1957 Tolerances and general features for plain limit gauges
GB/T 3478.1 Straight cylindrical involute splines - Metric module side fit -
Part 1: Generalities (GB/T 3478.1-2008, ISO 4156-1:2005, MOD)
GB/T 3478.6 Straight cylindrical involute splines - Metric module side fit -
Part 6: 30° pressure angle M and W values
GB/T 3478.7 Straight cylindrical involute splines - Metric module side fit -
Part 7: 37.5° pressure angle M and W values
GB/T 3478.8 Straight cylindrical involute splines - Metric module side fit -
Part 8: 45° pressure angle M and W values
GB/T 3478.9 Straight cylindrical involute splines - Metric module side fit -
Part 9: Measuring pin
GB/T 13924 Inspection code for accuracy of involute cylindrical gears
3 Standard temperature
The standard temperature for measurement is 20 °C.
4 Inspection of major diameter and minor diameter of
spline
4.1 The limit size of the minor diameter of the internal spline Dii may be checked
by the general smooth GO plug gauge and the NO GO plug gauge, it may also
be measured by other methods.
4.2 The limit size of the minor diameter of the external spline Dee may be
checked by the general smooth GO plug gauge and the NO GO plug gauge, it
may also be measured by other methods.
4.3 The use of general smooth plug gauge and ring gauge shall comply with
the provisions of GB/T 1957.
4.4 The major diameter of internal spline Dei, the minor diameter of external
spline Die, the minimum radius of curvature of the root arc may be guaranteed
by the process. If necessary, it shall be tested.
5 Inspection of the space width of internal spline, tooth
thickness of external spline, diameter of involute end
circle, diameter of involute starting circle
In GB/T 3478.1, it specifies three composite inspection methods and one single-
item inspection method, totally four inspection methods, which are used to
inspect four limit sizes of the space width and the tooth thickness (see Figure
1), as well as the minimum value of diameter of the involute’s end circle DFi min
and the maximum value of the diameter of the starting circle DFe max.
See Appendix A for the involute spline gauges used to inspect the space width
and tooth thickness.
thereby controlling the minimum value Cv min of the active side gap.
At the same time, use the non-whole-depth NO GO spline gauge (plug gauge
or ring gauge) or use the measured M value (pin spacing MRi or cross-pin
distance MRe) (for the external spline, it may use the average length W value of
the measured common normal line), to control the maximum value of actual
space width of the internal spline Emax or the minimum value of the actual tooth
thickness of the external spline Smin, thereby controlling the minimum physical
size of the internal and external.
5.2 Method-A
On the basis of the basic method, add the use of NO GO composite spline
gauge (plug gauge or ring gauge), to control the maximum value of the active
space width of the internal spline Ev max or the minimum value of the active tooth
thickness of the external spline Sv min, thereby controlling the maximum value
Cv max of the active side gap.
This method is suitable for two-way-rotation transmissions that have return
requirements.
5.3 Method-B
Use the GO composite spline gauge and the NO GO composite spline gauge
(plug gauge or ring gauge) to respectively control the minimum value Ev min and
the maximum value Ev max of the active space width of the internal spline or the
maximum value Sv max and the minimum value Sv min of the active tooth thickness
of the external spline, thereby controlling the minimum value Cv min and the
maximum value Cv max of the active side gap.
This method may only be used when the method-A is adopted, and it is proved
by mass production that the process quality is stable. If the process quality
fluctuates and may affect the product quality, it shall also use the method-A.
5.4 Single-item inspection method
Use the NO GO sector gauge and the NO GO sector gauge, or the pin spacing
MRi, to control the maximum value Emax and the minimum value Emin of the
actual space width of the...
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