記号 Symbol |
記号の意味 Meaning of the symbol |
単位 Unit |
---|---|---|
P | ばねにかかる荷重 The load on a coiled spring |
kgf |
d | 材料の直径 Diameter of the material |
mm |
D | コイル平均径 Mean diameter of the coil |
mm |
na | 有効巻数 Effective number of turns |
― |
G | 横弾性係数 Modules of rigidity |
kgf/mm2 |
δ | ばねのたわみ Deflection of the spring |
mm |
K | ばね定数 Spring constant |
kgf/mm |
D1 | コイル内径 Inside diameter of coil |
mm |
D2 | コイル外径 Outside diameter of coil |
mm |
上記計算式は圧縮コイルばね及び初張力のない引張コイルばねに適用する。
The above calculation formula is applied for compression coil and extension coil which does not have the initial tension.
Effective number of turns : As an indication, 3 rolls and more would be better.
Aspect ratio :
Coil pitch : As an indication, 0.5D and under would be better.
材料 Material |
G の値 kgf/mm2 G value kgf/mm2 |
|
---|---|---|
ばね鋼鋼材 Steel for spring |
8×103 | |
硬鋼線 Hard steel wires |
8×103 | |
ピアノ線 Piano wires |
8×103 | |
オイルテンパー線 Oil tempered wires |
8×103 | |
ステンレス鋼線 Stainless steel wires |
SUS302 | 7×103 |
SUS304 | ||
SUS316 | ||
SUS631J1 | 7.5×103 | |
黄銅線 Brass wires |
4×103 | |
洋白線 Nickel silver wires |
4×103 | |
りん青銅線 Phosphor bronze wires |
4.3×103 | |
ベリリウム銅線 Beryllium bronze wires |
4.5×103 |