3.1 Calculation formula of cylindrical helical compression spring Table 12-2-8 Calculation formula of cylindrical helical compression spring Name Unit Formulas and Data Main calculation formula Material Diameter d mm C=5-8 Effective coils n Coil Spring rateP’ N/mm Geometry calculation Spring diameter D mm Estiminated according to the constructions Inside diameter D1 mm D1=D-d Outside diameter…
Table 12-2-6 Stress values of compression, tension and torsion spring materials MPa Wire Type Oil Quenched-Tempered Spring Wire Carbon Spring Wire Important Uses Carbon Spring Wire Stainless steel wire for spring Bronze wire Bronze plated wire (aged) 60Si2Mn,60Si2MnA 50CrA、55CrSiA 60CrMnA、60CrMnBA 60Si2Cra,60Si2Crva Compression Spring Test stress 0.550, 0.50 0.450, 0.40r, 710~890 Static load allowable stress 0.500…
Table 12-2-5 Ultimate tensile strength of bronze wire σb Material Silicon bronze wire (from CB 3123-1982) Tin bronze wire (from CB 3124-1982) Beryllium bronze wire (from CB 3134–1982) Wire Diameter/mm 0.1~2 07 >2~4.2 >4.2~6 0.1-2.5 >2.5~4 >4~5 state Before hardening and tempering:HB After hardening and temperingHB Soft 343~568 >1029 Tensile Strength 784 833 833…
Mechanical properties of oil quenched-tempered spring steel wire (from GB/T 18983-2003) Diameter/mm Tensile Strength Section reduction 8/%≥ FDC FDCrV-A FDCrV-B FDSiMn FDCrSi TDC TDCrV-A TDCrV-B TDSiMn TDCrSi 」 FD TD Static Fatigue Strength Level 0.5~0.8 1800~2100 1800~2100 1900~2200 1850~2100 2000~2250 45 45 >0.8~1.0 1800~2060 1780~ 2080 1860~2160 1850~2100 2000~2250 45 45 >1.0~1.3 1800~2010 一 17502010…
Type, performance and application of spring There are many types of springs and many classification methods. The spring types listed in table 12-1-1 are classified according to the structural shape Table 12-1-1 Types, properties and applications of springs Type Structure diagram Property line Performance and Application Cylindrical coil spring Circular section cylindrical helical compression…
Tensile Strength Of Spring Steel Wire Wire diameter / mm Oil quenched and tempered carbon spring steel wire for valves (gb4359) Oil quenched and tempered carbon spring steel wire (gb4360) Tensile strength of oil quenched and tempered silicon manganese alloy spring steel wire (gb4361) Oil quenched and tempered chrome silicon alloy spring steel wire for…
Spring Material and Allowable Stress Most springs work under variable stress, and their performance and service life largely depend on the characteristics of materials. The selection of spring material is mainly determined according to the working conditions of the spring, the type of load, whether it is subject to impact load and the allowable stress…
Type, Code and Application of Cylindrical Spiral Spring Type Code Drawing End structure type Application Cold coil compression spring（Y） Y I Both ends shall be tightened and ground flat It is suitable for cold coil, with material diameter d ≥ 0.5mm, and is not suitable for springs for special purposes n2=1～2.5 Y Ⅱ Both ends…