I-Physics yobude be-Shaft nobukhuthaza: Ukubuyiswa ngokuchitha vs. Ubukhuthaza

Utheyori yokubuyiswa ngokuchitha kwe-elastic kwe-diamond core bits ezingaphansi

Kodwa uma izikhala zihamba ngaphezulu, zizokhula kakhulu ngaphansi kwesibonelo ngokwesithembiso esibhekene ne-theory ya-Euler-Bernoulli yezikhala. I-math emva kwalokho ibonisa okuthile okuhle ngempela: uma sibuyisela ubude bezikhala kabili, ukukhula kwezikhala ngaphakathi kuzoba kabili ngamashumi amane ngokufanayo kokukhula kwezikhala ngaphakathi kwezinhlobo zokukhula ezifanayo. Lokhu kwenza imiphumela emibi kakhulu ekupheleni kwezinkundla zokukhula ngaphakathi kwezinkundla ezingaphezulu, ikakhulukazi kodwa uma lezi zinhlobo zokukhula ngaphakathi ziyahamba ngaphezulu kuka-800 Newtons. Noma ngezinye izikhala ezincinci zokukhula zingasindisa ukuchaza kwezinkundla zokukhula ngaphakathi kabanzi. Umthwalo wokusebenzisa umthwalo uzoba yinto eyodwa yokuqinisa lokhu. I-tungsten carbide iyisilingo esihle kakhulu kulokho kune-steel enguqukile ngalesi simo ngoba ina-40 percent yokuthintana kakhulu. Lokhu kusho ukuthi kubeka kancane ukukhula ngaphakathi kwezikhala ngaphakathi kwezinkundla zokukhula ngaphakathi, okunika ukuthi konke kubheke phambili ngaphandle kokuthintana kwezinkundla zokukhula ngaphakathi noma ukuthintana kwezinkundla zokukhula ngaphakathi.

Ukuhlukaniswa kwezikhala zokukhula ngaphakathi nokukhula ngaphakathi (≥0.15 mm ngaphakathi kwezikhala zokukhula ngaphakathi zokukhula ngaphakathi zokukhula ngaphakathi zokukhula ngaphakathi)

Ngokwesifundo sezinsizakwemilambo, kubonakala kukho indlela eyodwa apho izinto zihamba ngayo: lapho izikhumba zokuchitha zihamba ngaphezulu kwe-0.9 mita, zibegina ukuthi zihlambulula kusuka kumaqanda kumaqanda. Ngama-1.2 mita ngokuchitha kwemithombo yomthombo, lokhu kuhlanganisa noma kufika ku-0.15 milimita ngokwesifundo sezindustria esayiswe ngo-2023. Ngasinye isikhumba esingaphezulu kwe-0.3 mita esifaka kumhla wokuchitha, isikhumba sikhulula ngokuphakeme kwezindawo ngokuphakeme kwe-22 percent. Futhi lapho uhlongo lwesikhumba kunezinhlobo zokuchitha kufika kwe-15 ku-1, kuzoba kubonakala okunye—ukuthwasa kwezinhlobo zokuthwasa kuyabeka ukuthwasa kakhulu ngokuphakeme kwezindawo. Lokhu konke kuchaza ngokuthi abasebenzi badinga izinhlangano zokujabulisa ngokuphakeme lapho besebavuselela izikhumba zokuchitha zezindawo eziningi noma kude kwezindawo.

Lapho izikhumba ezide zihlela ukuthembeka: Izinhlobo zokuthwasa kwezikhumba zokuchitha zokuthwasa kwezikhumba zokuchitha

Kodwa uma izikhumba ezisindisiwe ziyakhiwa ngokusebenzisa ukuthuthukiswa kwe-carbide yemicro crystalline, zizokhombisa ubukhulu obungapheliyo. Imetalu yezinkulungwane zezintandabuzo aziphinde zikwazi ukufanana nalo okwenza le-composite—kuyakha ngokuphelele amaqhina amashumi amathathu okukhula kwe-vibration energy. Ngokunqoba ukuthi le-vibrations zizokhula, le-matriyali iyazibeka ngokuthi iye yasihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngokuthi iyazihlwa ngok......

Ukugcina Kukhulu kwe-Depth kanye ne-Ratios L/D: Izindlela Zokuhlinza Ukuphakanyiswa Kwesikhumba Sokubhalwa Ngokuphelele

Izindaba zemvelo: 78% yezindlela zokuphakanyiswa kwesikhumba >3° ziyakhiwa ngaphezu kwe-0.9 m shank length kwi-granite coring

Kodwa kufundwa kwe-granite, kukho isikhathi esisodwa sokuguqula ngokwesibonelo ngaphakathi kwesikhombisa se-0.9 meter. Ngaphezulu kwalokho ubude, umbili wezine zezinkulungwane zezingqimba zizobuka ngaphezulu kwezinguqulelo ezingama-degrees ethathu. Lokhu kubiza? Iziququlelo ezincane ziyagcina ngokuphakeme ngenxa yokuzihlukana kwebhola, futhi lezi ziququlelo ezincane zizogcina ngokuphakeme uma kusebenziswa izishankha ezide ngaphansi kwesiphambano sesidenge. Izishankha ezincane, ezifana nezinesibonelo se-0.8 meter noma ngaphezulu kwalokho, ziyabona ngokuphelele ngokuphelele kakhulu, ngeziququlelo ezingama-degree e-1.5 kuzo zonke izinkulungwane ngoba ziyathola ukugcina okuncane kwe-vibration. Ukuphambuka ngaphezulu kwe-0.9 meters ngaphandle kokuthinteka kahle kungase kuthintela imali yeprojekthi, kongena ngokwesibonelo kwezinkulungwane ezingama-40% ekupheleni ngokulandelayo kwe-Geotechnical Drilling Journal yelinye ilanga. Lokhu kuyisibonelo sokuthi ukujabula ukuthi ukubuka kuyaphakamisa kahle akuyiyo kuphela umsebenzi omuhle, kodwa uyisibonelo esingapheliyo kanye nokubaluleka kakhulu kwenyathelo yokuqonda.

Iziratio zokubhekana kwe-ubude kune-diameter (L/D) ezinembile kwezinqimba ezide: 12:1 vs. 18:1

Isilinganiso sesilinganiso sesandla kanye ne-diameter (L/D) sisebenza njengezindikimba esiphambili xa kufuneka kubalwa ukuthi isandla sifika kangakanani emanzini noma kusha kakhulu ngokuphambuka kwayo. Uma kusebenziswa imishini engaphezulu kwe-1.5 mita, ukusebenzisa isilinganiso se-12:1 sibiza inkululeko yokuzimela kokugcina ngokuphambuka kwesandla. Lokhu kunciphisa izinkinga zokugcina ngokuphambuka ngokuphakeme kwezintathu ngokuphakeme kwezinye izilinganiso ze-18:1 ngoba ubukhulu bezindlela zokuzimela kusakha kahle kusandla. Kodwa izinto zihlukana uma sibheka amashini aphezulu kwe-2 mita emazini okwesibhakabhaka. Kulesi sikhathi, ukuguqula kusilinganiso se-18:1 sibiza ngoba kusiza ekuvikelweni kwemithambo yezinkululeko futhi kusiza ekuchazweni kahle ngokuphambuka kusendleleni. Kunezidingo zokugcina izilinganiso ezahlukene kusukela kuthi yiziphi izinkinga ezifanele ukuzweleka ngasinye isikhathi.

• 12:1: Kubiza ukuvikela kakhulu kokugcina ngokuphambuka (<0.1 mm) kodwa kubeka iziphakamiso eziphezulu zokufika emanzini
• 18:1: Kusiza ekufikeni kahle emanzini kodwa kubangela ukuthi kufuneke kubhekwe ukuvikela okwesibili—kabanzi ukuvikela ngamatshitshi amathathu—ukungena kwezinkinga zokugcina ngokuphambuka kungaphezulu kwe-2.5°

Izinkomba Zokudesign Kwe-Core Bit Ezikubona Ukungafani Kwe-Shaft

Ukuchazwa Kwabantu Bokudiameter Kwe-Bit, Ubude Bwe-Segment, Nokuthintha Kwabantu Bokushank Kwezinkampani Zokuthintha

Ukuhlanzwa kwe-rotational rigidity kwe-shaft akuyiyo kuphela ukubhekana nokude kwakho. Ukuphatha kuyasebenza kakhulu lapha futhi. Uma sibheka amanombolo, ama-shaft angaphezulu kwe-diameter ayizoba ezinkulu ngokujulile. Kodwa kukho okunye okubalulekile okwenza kwezishankha. Uma ubude bawall thickness buya ku-3.5 mm noma kude kwalokho, ipolar moment of inertia iyaphakama phakathi kwe-60% ne-75%. Manje ngamasegment yabo, ubude bakho buyabhekana kakhulu. Amasegment angaphezulu ayadlula isikhundla sokuvuka kwe-mass kude kakhulu, okuyenza ukuthi izivungu ziyazoba zingabi nesikhundla esihle xa kusebenziswa. Amathesiti asekhaya ayavumela lokhu futhi. Ukunciphisa ubude bamasegment ngeminyaka engu-15% yayinika ukunciphisa kwe-lateral runout ngeminyaka engu-28% xa kudrillwa emagranite amangalisa e-1.2 meters. Ngakho uma kusebenziswa emasitayela apho amasitayela ayisifanayo noma kusetyenziswa amandla okufaka angafanele, ukuzimisa ubude bawall thickness kuyasebenza kakhulu kuneukwakha kwe-shaft ngaphezulu.

Amasistimu we-stabilization esithathu-isipoyinti asinciphisa i-radial play ngeminyaka engu-42% kwe-shafts oziningi kune-1 m

Indlela yokuthintana kwezintathu ezinokubeka isikhathi sokugcina ngokujabulisa ngokusebenza kwezinkampani zokugcina ezingenani, ngokuphatha kwezinkampani zokugcina ezihlukene zokugcina ngokusebenza kwezinkampani zokugcina ezingenani. Isikhathi sokugcina sisebenza ngaphansi kwemitha yomhlaba emibili nezingu-1.5, okungukuthi kukhulu kakhulu. Futhi, ngokusebenza kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina ezinokugcina ngokuphatha kwezinkampani zokugcina......

Imibuzo Evame Ukubuzwa

Kungani ubude boshafu buhambisana nokusebenza kokubhala?

Ubude boshafu buyaphatha kakhulu ukuthembeka nokuhleleka. Amashafu amanene ayabuka ngaphezulu kokugcinwa, kwenza izinkinga ngemisebenzi yokukhupha imikhumba emininengi.

Izinkulungwane ziphi ezigcwele kakhulu kuma-shafu amanene?

Izinkulungwane njenge-tungsten carbide ziyasebenzisa kakhulu kuma-shafu amanene ngokuthi zinomthembeko omkhulu futhi zingakwazi ukubuka, okuzosiza ekufakweni kwemikhumba emihle.

Umlinganiselo wokulinganisa ubude nobude boshafu (L/D) uyiphi okulinganayo ukuthembeka koshafu?

Kuma-shafu angaphezulu kwe-1.5 mita, umlinganiselo we-12:1 we-L/D uyalungiselela ukulawula kahle, nakuma-shafu angaphezulu kwe-2 mita kungayikusiza umlinganiselo we-18:1 nesiqondiso sokuthembeka.

Izisifundo zesithathu-siphindele zisenzela njani?

Lezi zisifundo zisebenzisa izibhola zetungsten carbide ezihlukaniswe ngamaphathi ukusambula amandla okuvuleka ngokuphelele, okunciphisa ukuphinda kwezibhola nokuthintana ngemisebenzi yezibhola ezihleli kahle.