He aha nga Taurangi Matua i roto i te Hoahoa Puna Torsion?

Your product needs specific rotational force, but a generic spring fails. This leads to poor performance and broken parts. Proper design focuses on wire, porotaka, and legs for perfect function.

Ko nga taurangi matua mo te hoahoatanga o te puna toronga ko te momo rawa me tona kaha tensile, te diameter waea, the body's coil diameter, me te maha o nga koti kaha. These factors collectively determine the spring's torque output, taumata ahotea, me te kaha hurihuri.

I've seen many projects where a simple prototype works, but the final product fails. The reason is often a misunderstanding of how the spring's physical properties create the force. It's a precise calculation, ehara i te whakaaro. Ki te hanga puna e mahi pono ana mo nga mano o nga huringa, we have to engineer it from the wire up. Let's start with the most important question: how much force do you actually need?

How Is Torque Calculated for a Torsion Spring?

Your lid feels too heavy or it slams shut. The wrong spring torque ruins the product's feel. Ka tatauhia e matou te reiti o te puna ki te tuku i te kaha tika e hiahiatia ana mo te nekehanga whakahaere.

Ka tatauhia te taipana ma te whakarea i te reiti puna ki nga nekehanga o te haere koki. The spring rate itself is determined by the material's modulus of elasticity, diameter waea, and coil count. Ma tenei ka taea e maatau te miihini i tetahi puna e whakarato ana i te tino tika, predictable force at any given position.

Kei te maumahara ahau ki tetahi kaihoko e hanga ana i tetahi ipu para arumoni teitei me te taupoki kati. I whakamahia e ta raatau tauira tuatahi he puna kaha rawa atu. The lid slammed shut with a loud bang, he iti noa te ahua, he morearea haumaru pea. They gave us the lid's weight and the distance from the hinge, a ka tatauhia e matou te taipana tika hei kati me te ata noho. Ka mahi whakamuri matou ki te hoahoa i tetahi puna me te reiti puna tino pai. The final product felt smooth and high-quality, a ko taua wheako kaiwhakamahi pai i heke ki te whakarite tika i te tatauranga taipana.

Te Turanga o te Kaha: Te Raru o te Ra

The spring rate is the soul of the design. It defines how much the spring "pushes back" for every degree it is wound.

• He aha te Reiti Puna? It's a measure of the spring's stiffness, expressed in torque per degree of rotation (E.g., N-mm/degree or in-lb/degree). A spring with a high rate feels very stiff, while one with a low rate feels soft. Our goal is to match this rate to the force required by your mechanism.
• Kī matua: The spring rate is not arbitrary. It is a direct result of the material's properties (Modulus of Elasticity), te diameter waea, the coil diameter, me te maha o nga koti kaha. Wire diameter has the most significant impact—a small change in wire thickness causes a huge change in the spring rate.

He aha te take i tino hira ai te Diane Coil me te Rahi Arbor?

He tino pai te ahua o to puna, engari ka herea, ka pakaru ranei i te wa o te whakaurunga. You didn't account for how the spring's diameter changes under load, ka hinga i mua i tana mahi.

Ko te diameter o roto o te puna torsion me nui ake i te take (rakau) ka eke ki runga. I te mea kua werohia te puna, ka heke tona diameter. Mena he iti rawa te waatea, ka herea te puna ki runga i te whanga, he waku, mahi pohehe, me te kore kino.

I mahi tahi matou me tetahi roopu miihini i runga i tetahi miihini miihini i whakamahi i te puna torsion hei whakahoki mai i te ringa karetao.. He pai te ahua o ta raatau tauira CAD, engari i te whakamatautau, ka pakaru tonu nga puna i te hautanga o to ratou oranga. I asked them for the arbor diameter and the spring's inside diameter. When they wound the spring to its final position, the clearance was almost zero. The spring was grinding against the shaft with every cycle. This intense friction was creating a weak spot and causing it to snap. We redesigned the spring with a slightly larger inside diameter, and the problem disappeared completely. It’s a simple detail that is absolutely critical.

Designing for a Dynamic Fit

A torsion spring is not a static component; its dimensions change in operation.

• The Rule of Winding: As a torsion spring is wound in the direction that closes the coils, the coil diameter tightens and gets smaller. The body length of the spring also gets slightly longer as the coils press together. This is a fundamental behavior that must be accounted for in the design.
• Calculating Clearance: We recommend a clearance of at least 10% between the arbor and the spring's inner diameter at its most tightly wound position. Hei tauira, if a spring's ID tightens to 11mm under full load, the arbor should be no larger than 10mm. This prevents binding and ensures the spring can operate freely. A professional spring designer will always perform this calculation.

Ka Paa Te Aranga Awhiowhio Nga Mahi o te Koanga?

Kua whakauruhia to puna, a, ka pakaru tonu. I utaina e koe te puna i runga i te huarahi e wetekina ai, ka ngaro tona kaha katoa, ka pakaru tonu te wahanga.

Āe, he mea nui te ahunga awhiowhio. A torsion spring should always be loaded in a direction that tightens or closes its coils. Ma te whakamahi i te kaha ki tera taha ka wetekina te puna, ka whai hua, ngaro tona taipana, ka taka tata tonu.

Koinei tetahi o nga mea tuatahi ka whakapumautia e matou mo tetahi hoahoa hou. A customer once sent us a drawing for a "right-hand wound" puna. I hangaia e matou kia rite ki o raatau whakaritenga. He wiki i muri mai ka waea ratou, pouri, e kii ana ko nga puna "kua ngaro." After a short conversation and a few photos, we realized their mechanism loaded the spring in a counter-clockwise direction. They actually needed a left-hand wound spring. We made a new batch for them, and they worked perfectly. It highlights how a spring can be perfectly manufactured but still fail if it's not correctly specified for its application. We always ask, "Which way will you be turning it?"

Winding, Stress, and Proper Loading

The direction of the wind determines how the spring safely manages stress.

• Right-Hand vs. Ringa-maui: A right-hand wound spring is like a standard screw; the coils travel away from you as you turn it clockwise. A left-hand wound spring is the opposite. The choice depends entirely on how the spring will be loaded in your assembly.
• Stress Distribution: When you load a spring in the correct direction (tightening the coils), the bending stress is distributed favorably across the wire's cross-section. When you load it in the wrong direction (opening the coils), the stress concentrates on a different point, leading to much higher stress levels and causing the material to yield. The spring essentially just bends open and is destroyed.

Whakamutunga

Proper torsion spring design balances torque, inenga, and direction. By engineering these variables together, we create a reliable component that performs exactly as your product requires, cycle after cycle.