How Do You Measure an Extension Spring?

Muyenera kuyitanitsa kasupe wosintha, koma miyeso yanu ndi yosagwirizana. Kuyitanitsa gawo lolakwika kumatanthauza kuchedwa kokwera mtengo, kuwononga ndalama, ndi makina omwe sanagwire ntchito.

Kuyeza kasupe wowonjezera molondola, muyenera miyeso itatu yofunika: utali waulere (kupimidwa kuchokera mkati mbedza mpaka mkati mbedza), m'mimba mwake kunja kwa koyilo, ndi wire diameter. Kugwiritsa ntchito digito ma calipers[1] ndikofunikira kuti mulongosole bwino.

Kupitilira wanga 14 zaka mu makampani mwambo kasupe, I've seen more projects delayed by incorrect measurements than by almost any other issue. Wopanga injini adzatumiza chojambula chokhala ndi miyeso yomwe ili pafupi ndi kachigawo kakang'ono ka millimeter, koma cholakwika chaching'ono chimenecho chingapangitse kasupe womaliza kukhala wosagwiritsidwa ntchito. Kupeza miyeso itatu iyi kuyambira pachiyambi ndi sitepe imodzi yofunika kwambiri popanga kapena kusintha kasupe. Let's go through each one so you can measure with confidence.

How Should You Measure an Extension Spring's Length?

You measured your spring from the outside tip of one hook to the outside of the other. The replacement spring arrived, but it's too long and feels loose when installed.

This is a very common mistake. The correct way to measure the "free length" of an extension spring is from the inside of one hook to the inside of the other. This represents the spring's length at rest before any load is applied.

I will never forget a client who worked on agricultural equipment. They needed to replace a critical spring in a harvester, and the machine was down during peak season. They were in a huge rush and sent us measurements taken from the outside of the hooks. Tidapanga akasupe ndendende momwe amajambula. Pamene adaziyika, akasupe anali aatali kwambiri ndi ofota, zomwe zidapangitsa kuti makina apambane. Tinayenera kuthamangira batch yatsopano, ndipo anataya nthawi yamtengo wapatali. Zomwe zinandichitikirazi zinandiphunzitsa kuti nthawi zonse ndiyang'ane kawiri ndi makasitomala pa muyeso umodzi wapadera. It's the baseline for everything.

Chifukwa M'kati-ku-Mkati ndi Muyeso

This measurement method is the industry standard because it directly relates to the spring's performance. Zonse zowerengera za Mlingo wa masika[^ 2] ndipo katundu amatengera paulendo mtunda, zomwe zimayambira pautali waulere.

• Imatanthauzira Zero Point: The inside-to-inside length is the spring's true length before any stretching force is applied.
• Imatsimikizira Kuwerengetsera Kulondola: Mukawerengera kutalika kwa masika (Utali Wowonjezera - Utali Waulere), kugwiritsa ntchito zolondola utali waulere[^ 3] ndikofunikira kuti mupeze mtengo wolondola wa katundu. Kuyeza kuchokera kunja kumawonjezera ma diameter awiri a waya mpaka kutalika, zomwe zidzataya mphamvu zanu zonse zowerengera.

What's the Right Way to Measure the Diameter?

Munayeza kukula kwa mkati mwa makola. Tsopano kasupe watsopano wafika, but it's too wide and won't fit into the designated channel in your product's housing.

Vutoli limachitika chifukwa mulingo wamakampani ndikulongosola akasupe ndi awo Kunja Diameter (YA). The OD is the spring's widest point and is the critical measurement for ensuring the spring has proper clearance to move without rubbing or binding.

Ndinkagwira ntchito ndi gulu lopanga kachipangizo kamagetsi komwe kanagwiritsidwa ntchito pobweza chivundikiro chotsetsereka.. Iwo anatchula Mkati Diameter (ID) chifukwa kasupewo amayenera kukwanira pamtengo waung'ono wolondolera. Komabe, mapangidwe awo a nyumba anali olimba kwambiri. Pamene tinapanga kasupe ku ma ID awo, OD yotulukayo inali yayikulu pang'ono kuti ikwane munjira yanyumba. Chivundikirocho chikanamatirira ndi kukwapula. Tidayenera kusintha kukula kwa waya ndi kuchuluka kwa ma coil kuti tipange mapangidwe atsopano omwe amakwaniritsa zofunikira za ID pa positi komanso zofunikira za OD panyumba.. Izi zinandiphunzitsa kuti nthawi zonse ndizifunsa za chilolezo.

Kunja Diameter Ndi Kiyi ya Fit

Pomwe Mkati Diameter (ID) ndikofunikira ngati kasupe afika pa ndodo, OD ndi yomwe imatsimikizira ngati ikukwanira mkati danga. Pachifukwa ichi, wakhala muyezo wapadziko lonse lapansi.

• Zitsimikizo Chilolezo: OD ndiye muyeso womwe mumayang'ana pa dzenje kapena njira yomwe masika angagwiremo. Kasupe amafunikira malo owonjezera pang'ono kuti akule ndi kukhazikika popanda kukangana.
• Kusasinthasintha mu Kuyeza: Ndikosavuta kupeza muyeso wolondola komanso wobwerezabwereza wa OD nawo ma calipers[1] kuposa kuyeza ID.
• Kuwerengera Ma Diameters Ena: Mukakhala ndi OD yolondola ndi waya awiri[^ 4], Mean Diameter (D) ndi Inside Diameter (ID) akhoza kuwerengedwa mosavuta. ID = OD - (2 × Wire Diameter).

Mumayezera Bwanji Diameter Ya Waya Molondola?

Munagwiritsa ntchito rula kapena tepi kuyeza kuti muyerekeze kukula kwa waya. Kasupe womwe mudalandira ndi wamphamvu kwambiri chifukwa ngakhale cholakwika chaching'ono chinapangitsa kuti waya wokhuthala kwambiri.

The waya awiri[^ 4] is the most critical dimension for a spring's performance. Muyenera kuyeza ndi zojambula za digito[^ 5]s](https://www.penntoolco.com/blog/the-different-types-of-calipers-and-their-uses-in-precision-measurement/?srsltid=AfmBOorcMFECtyqV0o61gihn_Y5_py6TK0PCCSEwjyLFWivJ1aOOHC-N)[^1] pa ngodya ya 90-degree ku waya. Since it's used to the 4th power in the Mlingo wa masika[^ 2] fomula, ngakhale cholakwika chaching'ono chimakhudza kwambiri kuuma.

Uku ndi kuyeza komwe kulibe malo olakwa. Ndinali ndi kasitomala mu gawo lamagalimoto omwe anali prototyping makina atsopano latch. Anatitumizira zojambula ndi a waya awiri[^ 4] pa 1.5mm. Tinapanga zigawo. Iwo anali ofooka kwambiri. Pambuyo pa chisokonezo chachikulu, adayesanso chitsanzo choyambirira chomwe amayesa kukopera ndipo adazindikira kuti wayayo analidi 1.8mm. Kusiyanitsa kwakung'ono kwa 0.3mm uku kudapangitsa kuti kasupe yemwe anali wamphamvu kuwirikiza kawiri! Chifukwa cha cholakwika chaching'onocho, dongosolo lawo lonse prototyping anakankhidwira mmbuyo ndi milungu iwiri. Panopa, Nthawi zonse ndimauza makasitomala anga: ngati mungathe kuyeza chinthu chimodzi mwangwiro, pangani waya awiri.

Chifukwa chiyani Precision Siikukambirana

Mgwirizano wapakati waya awiri[^ 4] ndipo mtengo wa masika ndiwokwera kwambiri. Izi zikutanthauza kuti kusintha pang'ono mu kukula kwa waya kumapanga kusintha kwakukulu kwa mphamvu.

• Mphamvu ya Four: Ndondomeko ya masika (k = Gd⁴ / 8D³Na) zikuwonetsa kuti waya awiri[^ 4] (d) akukwezedwa ku mphamvu yachinayi. Izi zimapereka chikoka chochulukirapo pakuuma komaliza kuposa kusintha kwina kulikonse.
• Gwiritsani Ntchito Chida Choyenera: Wolamulira siwolondola mokwanira. Muyenera kugwiritsa ntchito ma calipers kapena micrometer kuti muwerenge bwino.
• Onetsetsani Kusasinthasintha: It's good practice to measure the wire in a few different spots along the spring's body to check for any inconsistencies, ngakhale izi ndizosowa ndi waya wamasika wapamwamba kwambiri.

Mapeto

Kupewa zolakwika zodula, measure an extension spring's free length inside the hooks, m'mimba mwake, ndi waya wake awiri ma calipers[1]. Miyezo yolondola iyi ndi zonse zomwe mukufuna.

[1]: Dziwani kuti ndi ma calipers ati omwe amapereka molondola kwambiri poyezera kukula kwa masika.
[^ 2]: Phunzirani za ubale wofunikira pakati pa ma waya awiri ndi kuchuluka kwa masika kuti mugwire bwino ntchito.
[^ 3]: Kumvetsetsa momwe mungayezere kutalika kwaufulu molondola ndikofunikira kuti muwonetsetse kuti kasupe wanu akuyenda bwino.
[^ 4]: Dziwani njira zabwino zoyezera mainchesi a waya kuti mupewe zolakwika zokwera mtengo pamasika.
[^ 5]: Onani momwe ma calipers a digito amalimbikitsira kuyeza kwake, kuonetsetsa kuti kasupe wanu akukwanira bwino.