Jinsi kiwango cha chemchemi kinavyokokotolewa?

The spring rate k for a helical compression spring is k = Gd⁴/(8D³n), where G is the shear modulus, d is wire diameter, D is mean coil diameter, and n is the number of active coils. This formula assumes round wire and negligible pitch angle.

Sababu ya urekebishaji ya Wahl ni nini?

The Wahl factor Kw accounts for curvature and direct shear effects in helical springs. Kw = (4C-1)/(4C-4) + 0.615/C, where C = D/d is the spring index. It increases the calculated shear stress, especially for small spring indices (tight coils).

Nielekezwe kwenye index ya chemchemi C ipi?

Index ya chemchemi C = D/d kati ya 4 na 12 ni ya kawaida. C 12 inaweza kusababisha kushikamana na kupinda. C = 6–10 ni bora kwa matumizi mengi.

Urefu wa hali imara ni nini na kwa nini ni muhimu?

Urefu wa hali imara ni urefu wa chemchemi inapobonyezwa kabisa hadi spirali zote zinaungana. Unasawiri (spirali zote) × kipenyo cha waya. Chemchemi haipaswi kamwe kubonyezwa hadi urefu wa hali imara wakati wa matumizi, au kuweka kwa kudumu (ubadilishaji wa plastiki) utatokea.

Moduli ya kukata G ipi niitumie?

Common values: Music wire (ASTM A228) G ≈ 79.3 GPa, Stainless 302 G ≈ 69 GPa, Chrome-vanadium G ≈ 77.2 GPa, Phosphor bronze G ≈ 41.4 GPa. G varies slightly with temperature and wire diameter.

Zana ya Uhandisi ya Bure #064

Kikokotozi cha Muundo wa Chemchemi ya Kushindia Iliyogeuza

Design helical compression springs. Enter wire diameter, coil diameter, free length, active coils, and shear modulus to calculate spring rate, max load, shear stress, and solid height.

Spring Rate k Wahl Factor Auto-Calc

Kipenyo cha Waya d (mm)

Kipenyo cha Wastani cha Koili D (mm)

Free Length L₀ (mm)

Active Coils n

Nyenzo (Moduli ya Mkazo wa Kunyata G)

End Type

Quick presets

Results

Spring Rate k

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Mzigo wa Juu Ukiwa Imara (F_solid)

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Mkazo wa Juu wa Kunyata τ (pamoja na Kw)

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Solid Height

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Spring Index C

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Wahl Factor K_w

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Spring Profile

Spring Rate

Msongo wa Kukata na Marekebisho ya Wahl

Wahl Factor

ambapo C = D/d ni faharasa ya chemchemi.

Solid Height

Material	G (GPa)	Typical Use
Waya wa Muziki (A228)	79.3	Matumizi ya jumla, maisha marefu ya uchovu
Chrome-Vanadium	77.2	Msongo mkubwa, mzigo wa mshtuko
Stainless 302	69.0	Upinzani wa kutu
Shaba ya Fosforasi	41.4	Umeme, isiyo na sumaku
Shaba ya Beriliamu	44.8	Haiwashi cheche, inayoelekeza umeme

Mfano — Chemchemi ya Waya wa Muziki

Given: d = 4 mm, D = 30 mm, L₀ = 80 mm, n = 10, G = 79300 MPa

C = 30/4 = 7.5

k = 79300 × 4⁴ / (8 × 30³ × 10) = 79300 × 256 / 2,160,000 = 9.39 N/mm

Solid height = (10+2) × 4 = 48 mm → Travel = 80 − 48 = 32 mm

F_solid = 9.39 × 32 = 300.5 N

⚠️ Note: Usikandamize chemchemi hadi urefu imara wakati wa matumizi. Sanifu safari ya kufanya kazi hadi ≤80% ya kupotoka kunakopatikana. Angalia upindaji ikiwa urefu huru/kipenyo cha wastani > 4.

Kikokotoo cha Ubunifu wa Chemchemi ya Msokoto Inayobanana | Zana ya Bure Mtandaoni #064

Published by Nikolai Shelkovenko on Febuari 15, 2026 Febuari 15, 2026

Results

Spring Rate

Msongo wa Kukata na Marekebisho ya Wahl

Wahl Factor

Solid Height

Duka

Support

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