Yeyiphi imingeni efihliweyo kuyilo lweNtwasahlobo lweCompression?

Uyile umthombo woxinzelelo ngamandla afanelekileyo. Kodwa ekuvavanyeni, iyagoba, breaks, okanye uyeke nje ukusebenza. Kutheni oku kusenzeka xa izibalo zibonakala zichanekile?

Eyona mingeni iqhelekileyo efihliweyo kuyilo loxinzelelo lwentwasahlobo ibambene phantsi komthwalo, ukuphelelwa yindawo yokuhamba (imiba ukuphakama okuqinileyo), ukungaphumeleli kwangaphambi kwexesha kuxinzelelo oluphezulu, kunye nokwehla komgangatho wokusebenza ngenxa yeemeko zokusingqongileyo ezifana nobushushu okanye umhlwa. Ukuqonda oku kuthintela ukusilela okunexabiso elikhulu.

I've seen these issues countless times over my 14 iminyaka kwishishini. Injineli indithumelela uyilo olukhangeleka lugqibelele ephepheni, kodwa ndiyakwazi ukubona kwangoko ingxaki eza kubangela ukuba lusilele kwihlabathi lokwenyani. It's rarely about simple force calculations. Imingeni yangempela kwiinkcukacha zendlela intwasahlobo eya kuziphatha ngayo phantsi koxinzelelo kunye nexesha. Let's break down these challenges one by one, ngoko unokuziphepha kwiprojekthi yakho elandelayo.

Kutheni iCompression yakho yaseNtwasahlobo igoba endaweni yokucinezela?

Intwasahlobo yakho idinga ukuxhasa umthwalo onzima. Kodwa xa ufaka uxinzelelo, iqubuda ecaleni okwebhanana, iyasilela ngokupheleleyo injongo yayo kwaye inokonakalisa imveliso yakho.

Oku kubizwa ngokuba buckling. Kwenzeka xa intwasahlobo ide kakhulu kwaye ibhityile ngobubanzi bayo. Umyinge wobude bayo obukhululekileyo ukuya kwidayamitha ephakathi yeyona nto ibalulekileyo eqikelela ukuba ingaba intwasahlobo iya kugquma phantsi komthwalo ngaphambi kokuba ixinaniswe ngokupheleleyo..

Ndikhumbula iprojekthi yenkampani yezixhobo zonyango. Babeyila ixesha elide, iprobe ebhityileyo ebidinga intwasahlobo ebuyayo elula kakhulu. Ubude obukhululekileyo buphelile 80 iimilimitha, kodwa ububanzi bangaphandle bebubodwa 6 iimilimitha. Ngomzuzu bayifaka kumdlalo wovavanyo, yaqhobosha. Umthombo wawumde kakhulu kwaye ubhityile ukuba ungahlala uthe tye. Sineendlela ezimbini ongakhetha kuzo ukusombulula oku. Ekuqaleni, sinokwandisa ububanzi bentwasahlobo, kodwa oku kuya kutshintsha amandla. Isisombululo esingcono kwisixhobo sabo yayikukufaka intonga ekhokelayo embindini wentwasahlobo. Intonga yayisebenza njengomqolo, ukuthintela intwasahlobo ukuba ingagobi emacaleni. Lulungiso olulula, kodwa enye ehlala ingahoywa kwinqanaba lokuqala loyilo.

Ukuqonda umlinganiselo wokuSlenderness

Undoqo ekuthinteleni ukubhitya ngumlinganiselo wokubhitya, obuBubude obuMahala (L) yahlulwe ngeMean Diameter (D).

Kwenzeka ntoni xa iNtwasahlobo yakho iphuma kwigumbi lokuhamba?

Your mechanism needs to move a specific distance. But it suddenly stops short, and you hear a crunching sound. Umthombo uphume ezantsi kwaye ngoku sisiqhekeza esiqinileyo sentsimbi.

This happens when the required travel is greater than the spring's available deflection before it reaches its solid height. Ubude obuqinileyo bubude bentwasahlobo xa zonke iikhoyili zichukumisa. Kufuneka uyilwe ngesithuba esaneleyo sesithinteli ukunqanda oku.

Umzekelo oqhelekileyo woku wawukunye nomxhasi weemoto oyila i-latch yebhokisi yeglavu entsha. Their drawings called for the spring to compress 15 mm. Intlakohlaza abayiyileyo yayinemijikelo eyaneleyo yokuvumela 15.5 mm yokuhamba. Ephepheni, yasebenza. But they didn't account for manufacturing tolerances of the plastic parts. Ezinye iiletshi zazizama ukucinezela intwasahlobo ukuba 16 mm. This forced the spring to its solid height, nto leyo yabeka umthwalo owothusayo ngendlela emangalisayo kwilatshi yeplastiki, ebangela ukuba yophuke. We redesigned the spring with a few more iikhoyili ezisebenzayo[^ 1] and a slightly smaller wire diameter. Oku kwanika uhambo olufumanekayo ngakumbi kwaye lwenza umda wokhuseleko, solving the problem completely. Ungaze uyila intlakohlaza ukuze isebenze ngokowona mlinganiselo uphakamileyo.

Key Travel and Height Terms

• Ubude obusimahla: Ubude obupheleleyo bentwasahlobo kwimeko yayo engaxinzelelwanga.
• I-Colas eSebenzayo: The coils that are free to deflect under load.
• Ubude obuqinileyo: Ubude bentwasahlobo xa ixinzelelwe ngokupheleleyo. The approximate formula is: (Iikhoyili ezipheleleyo) x (Ububanzi bocingo).
• Uhambo olukhoyo: Umahluko phakathi kobude obukhululekile kunye nokuphakama okuqinileyo. Uhambo lwakho olufunekayo kufuneka lube ngaphantsi kweli nani.

Kutheni le nto iSprings iqhekeka nangona amandla echanekile?

Intwasahlobo yakho ibonelela ngobungakanani obufanelekileyo bamandla, and it doesn't buckle or bottom out. Kodwa emva nje kwamawaka ambalwa emijikelo kuvavanyo, iyakhawuleza. Intlakohlaza iyasilela ixesha elide phambi kobomi bayo obulindelweyo bemveliso.

Oku kukusilela kokudinwa, kwaye kubangelwa luxinzelelo oluphezulu, hayi nje amandla aphezulu. Ngalo lonke ixesha intwasahlobo ixinzelela, i-wire material igxininiswe. Ukuba olu xinzelelo luphezulu kakhulu, iintanda ezincinci zenza kwaye zikhule kunye nomjikelo ngamnye kude kube yintwasahlobo.

Ndasebenza kwiprojekthi yenkampani eyenza iintonga zepogo. Iiprototypes zokuqala zazisilela emva kokutsiba okungamakhulu ambalwa kuphela. Intlakohlaza yavelisa imvula enkulu, ngoko amandla ayechanekile, but it couldn't survive the repeated impact. The stress on the wire was too high. The original design used a standard carbon steel. We solved the problem by switching to a high-tensile chrome silicon alloy wire. This material can handle much higher stress levels for millions of cycles. We also made a small adjustment to increase the wire diameter slightly. This combination lowered the operating stress to a safe level, and the new springs could withstand even the most aggressive testing. Force tells you how strong the spring is now; stress tells you how long it will last.

Managing Stress for Long Cycle Life

Ukuqukumbela

Designing a compression spring goes far beyond force. You must consider buckling, travel limits, kunye noxinzelelo lokudala inxalenye ethembekileyo ngokwenene kwihlabathi lenene.

[^ 1]: Learn about active coils to optimize your spring's deflection capabilities and performance.