GB/T 3478.5-1995 Test method for cylindrical spur involute splines GB/T3478.5-1995 Standard download decompression password: www.bzxz.net

UDC621.886.6
National Standard of the People’s Republic of China
GB/T3478.1~3478.9--1995
Cylindrical spur involute splines
Straight cylindrical involute splines1995-07-12Promulgated
State Administration of Technical Supervision
Implementation on 1996-05-01
National Standard of the People’s Republic of China
Cylindrical spur involute splines
Inspection methods
Straight cylindrical involute splines inspection methods
1 Subject content and scope of application
This standard specifies the inspection method for cylindrical spur involute splines. GB/T 3478.5—1995
This standard is applicable to the inspection of splines manufactured according to GB/T3478.1 standard, and can also be used as a reference for the inspection of cylindrical spur involute spline gauges.
2 Reference standards
GB1957 Smooth limit gauge
GB/T3478.1 Basic tooth profile tolerance of cylindrical spur involute spline module GB/T3478.6 M value and W value of 30° pressure angle 37.5° pressure angle of cylindrical spur involute spline
GB/T3478.7 Cylindrical spur involute spline GB/T3478.8 M value and W value of 45° pressure angle of cylindrical spur involute spline GB/T3478.9 Measuring rod for cylindrical spur involute spline
GB5106 Involute spline gauge
GB/T13924 Specification for precision inspection of involute cylindrical gears 3 Standard temperature
The standard temperature for measurement is 20℃.
4 Inspection of major and minor diameters of splines
4.1 The limit size of the minor diameter D. of the internal spline can be inspected by the go and stop gauges of ordinary smooth plug gauges, or by other methods. 4.2 The limit size of the major diameter D. of the external spline can be inspected by the go and stop gauges of ordinary smooth ring gauges, or by other methods. 4.3 The ordinary smooth plug gauges and ring gauges used should comply with the provisions of GB1957. 4.4 The major diameter Dci of the internal spline, the minor diameter D. of the external spline, and the minimum radius of curvature of the tooth root arc can be guaranteed by the process. If necessary, they should be inspected. 5 Inspection of the internal spline tooth space width and external spline tooth thickness, as well as the involute end circle diameter and the involute start circle diameter GB/T3478.1 stipulates four inspection methods, including three comprehensive inspection methods and one single inspection method, to inspect the four limit sizes of the tooth space width and tooth thickness (see Figure 1), as well as the involute end circle diameter Dr and the start circle diameter DFe. The involute spline gauge used to check the tooth width and tooth thickness should be in accordance with the provisions of GB5106. Approved by the State Bureau of Technical Supervision on July 12, 1995 and implemented on May 1, 1996
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Tooth width and tooth thickness
GB/T 3478.5-1995
Comprehensive inspection method
Basic method
Bar spacing
Non-full tooth stop gauge
Comprehensive through gauge
Comprehensive through gaugeWww.bzxZ.net
Non-full tooth stop gauge
Span distance
Method A
Bar spacing
Non-full tooth stop gauge
Comprehensive through gauge
Comprehensive through gauge
Comprehensive stop gauge
Non-full tooth stop Regulation
Span of rods
Method B
Auxiliary dimensions
Comprehensive stop gauge
Comprehensive through gauge
Comprehensive through gauge
Comprehensive stop gauge
Auxiliary dimensions
Single inspection method
Span of rods
Span of rods
AFo, fr, AF
AFp.AS.AF.
Span of pants
5.1 Basic method
GB/T 3478.5—1995
Use a comprehensive through-end spline plug gauge or ring gauge to control the minimum value of the internal spline effective tooth width Evmi and the minimum value of the involute end circle diameter DFimin, or the maximum value of the external spline effective tooth thickness Svmax and the maximum value of the involute start circle diameter Dremax, so as to control the minimum value of the effective side clearance Cvmin of the spline pair and ensure the spline tooth side fit properties. At the same time, use a non-full-tooth end spline plug gauge or ring gauge or measure the M value (MR or M) or W value to control the maximum value of the actual tooth width Emax of the internal spline or the minimum value of the actual tooth thickness Smin of the external spline, so as to control the minimum physical size of the internal and external splines. This inspection method is suitable for spline pairs where the comprehensive tolerances and processing tolerances T allow mutual compensation. 5.2 Method A
This method is based on the basic method, and adds a comprehensive stop spline plug gauge or ring gauge to control the maximum value Evmax of the internal spline effective tooth width or the minimum value Symin of the external spline effective tooth thickness, thereby controlling the minimum Cvmin and maximum Cvmax of the effective side clearance of the spline pair. This method is suitable for spline pairs with tolerance requirements for the effective side clearance. Using this inspection method, in order to control the maximum effective side clearance Cvmx of the spline pair, when the comprehensive error △in of the spline is very small and the comprehensive stop spline plug gauge or ring gauge passes, the total tolerance (T+in) value should be compressed accordingly, that is, it is not allowed to use the comprehensive tolerance in to compensate for the processing tolerance T due to a small comprehensive error △in. However, when △> is large, it can be compensated with a smaller processing tolerance T, and the total tolerance (T+) value remains unchanged.
5.3 Method B
This method is basically the same as method A, except that the maximum value Emx of the actual tooth width of the internal spline and the minimum value Smi of the actual tooth thickness of the external spline are used as the dimensions guaranteed by the process, and only spot checks or regular inspections are carried out. This method is suitable for spline pairs with stable processes and tolerance requirements for the comprehensive tolerance IN and the effective side clearance. When this inspection method is used, the compensation relationship between the comprehensive tolerance IN and the processing tolerance T is the same as that of method A. 5.4 Single Item Inspection Method
Use methods such as measuring M value (Mr or MR) or W value to control the maximum value Em and minimum value Emin of the actual tooth width of the internal spline, or the maximum value Sm and minimum value Smin of the actual tooth thickness of the external spline, and use the method of inspecting the cumulative error △F of the tooth pitch, the tooth shape error △f, and the tooth direction error △F: to indirectly control the comprehensive error △IN of the spline. This method is used for both acceptance of parts and analytical inspection. 5.4.1 For acceptance of parts
This method is suitable for spline products that do not have comprehensive gauges or cannot manufacture comprehensive gauges (such as single-piece production, small-batch production, and splines with large diameters).
5.4.2 For analytical inspection
5.4.2.1 Purpose of analytical inspection
When a part is rejected by the gauge or a pair of splines is in poor working condition, analytical inspection can be used to find out the reasons for rejection and poor working condition (see Table 1) in order to improve product quality. When conducting analytical inspection, it is recommended to use indexing error instead of pitch cumulative error. 5.4.2.2 Determination of indexing error
5.4.2.2.1 Since the pitch cumulative error includes the indexing error and the eccentricity of the actual axis of the spline relative to the processing datum or the measuring datum, the eccentricity has no effect on the spline with tooth side fit when it is inspected with a comprehensive gauge. Therefore, the indexing error should be separated from the eccentricity of the spline.
Comprehensive through-end spline gauge rejected
Comprehensive stop-end spline gauge rejected
Non-full-tooth stop-end spline gauge rejected
Few contact teeth, uneven force on each tooth
Poor contact along tooth height 1
Poor contact along tooth direction
GB/T 3478.5—1995
1. EySvmx
2. Comprehensive error A>Exceedance
1. Ev>Evmin;Sy
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