TB/T 2211-2010 English PDF (TBT2211-2010)

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TB/T 2211-2010: Steel helical spring of suspension mechanism for rolling stock
TB/T 2211-2010
TB
RAILWAY INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 45.060
S 40
Partially replacing TB/T 1025-2000, replacing TB/T 2211-1991
Steel helical spring of
suspension mechanism for rolling stock
ISSUED ON. DECEMBER 02, 2010
IMPLEMENTED ON. JUNE 01, 2011
Issued by. Ministry of Railways of People’s Republic of China
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Table of contents
Foreword ... 4 
1 Scope ... 6 
2 Normative references ... 6 
3 Terms and definitions, symbols, units, descriptions and geometric
characteristics ... 7 
3.1 Terms and definitions ... 7 
3.2 Symbols, units, description ... 8 
3.3 Geometric characteristics ... 10 
4 Product classification ... 10 
5 General application requirements ... 11 
5.1 Conditions of use ... 11 
5.2 Performance requirements ... 11 
5.3 Basic requirements ... 17 
6 Product technical specification ... 19 
6.1 Technical characteristics of products ... 19 
6.2 Design features ... 20 
6.3 Materials ... 21 
6.4 Mechanical properties of springs ... 22 
6.5 Surface protection ... 23 
7 Test method ... 23 
7.1 Summary ... 23 
7.2 Axial force-deformation test ... 24 
7.3 Transverse stiffness test ... 25 
7.4 Horizontal free offset or bowing ... 27 
7.5 Geometric characteristic test ... 27 
7.6 Product requirements ... 28 
7.7 Mechanical performance requirements ... 30 
7.8 Surface protection ... 30 
7.9 Fatigue test ... 31 
8 Product quality ... 31 
8.1 Product certification procedures and samples ... 31 
8.2 Product sampling ... 32 
8.3 Type inspection and exit-factory inspection ... 33 
8.4 Product nonconformity ... 33 
9 Marking ... 34 
10 Packaging ... 34 
Appendix A (Normative) Equal pitch and end closed and ground cylindrical
helical compression spring made from circular steel bar ... 35 
A.1 Summary ... 35 
A.2 Inner and outer diameters ... 35 
A.3 End coil of spring ... 36 
A.4 Contact line ... 36 
A.5 Geometric tolerances ... 37 
A.6 Spacing between coils ... 38 
Appendix B (Normative) Magnetic flaw detection of helical spring surface
defects made by circular steel bar ... 41 
B.1 Summary ... 41 
B.2 Method ... 41 
B.3 Special precautions ... 42 
Appendix C (Normative) Fatigue test of steel helical spring for suspension .. 43 
C.1 Test requirements ... 43 
C.2 Vertical fatigue test ... 43 
C.3 Transverse fatigue test ... 44 
C.4 Inspection after fatigue test ... 45 
References ... 46 
Foreword
This standard was drafted in accordance with the rules given in GB/T
1.1-2009.
This standard partially replaces the suspension spring part of the TB/T
1025-2000 “Technical conditions for the supply of hot coil helical compression
springs for rolling stock”, AND the part which is not replaced is the spring used
for buffer and traction device.
As compared with TB/T 1025-2000 “Technical conditions for the supply of hot
coil helical compression springs for rolling stock”, the main technical changes
of this standard are as follows.
- ADD the spring material dedicated for railway AND some spring materials
of European standards (SEE 6.3.3 and Table 5 of 6.4.1);
- ADD the information of spring transverse movement (SEE item 15 of
Table 1), transverse stiffness (SEE 5.2.3.2), transverse free offset or
bending (SEE 5.2.3.3), transverse stiffness test (SEE 7.3), and
transverse fatigue test (SEE Appendix C); DETAIL the spring transverse
characteristics, calculation, and test methods;
- MAKE reference to the determination of non-metallic inclusions in steel –
Standard rating chart microscopy method in GB/T 10561-2005.
This standard replaces TB/T 2211-1991 “Fatigue test of cylindrical helical
spring for rolling stock”. As compared with TB/T 2211-1991, the main technical
changes are as follows.
- DELETE the Appendix C “Repeatability of shot peening pre-stressing
effect” of EN 13298.2002 (SEE Appendix C of 2003 version);
- ADD the TB/T 1758 “Technical conditions for shot peening of rolling stock
springs”, which is directly quoted in the standard (SEE 5.3.2.4);
- ADD the “Fatigue test” requirements (SEE 7.9);
- ADD the transverse fatigue test methods; ADJUST the spring vertical and
transverse fatigue test specifications (SEE Appendix C);
- MAKE adjustment against the contents of the reference (SEE
references).
This standard, through the re-drafting method, modifies and adopts EN
13298.2002 “Railway applications - Suspension components – Helical
suspension springs, steel”.
Steel helical spring of
suspension mechanism for rolling stock
1 Scope
This standard specifies the geometric characteristics, application requirements,
technical specification, test methods, product quality, marking and packaging
of the steel helical spring of suspension mechanism for the newly designed
rolling stock (hereinafter referred to as spring).
This standard applies to.
- Steel helical spring of suspension mechanism for railway rolling stock;
- Equal pitch cylindrical compression springs made of circular
cross-section equal-diameter steel bar;
- Other different shaped helical springs (such as conical helical springs,
unequal pitch springs, or the springs made of steel bar having other
shaped cross-sections).
2 Normative references
The following documents are essential to the application of t...