Matsaloli na CNC Machining don Samun Karamin Tashin Mafi Kyau

Design for Manufacturability: Uba na CNC Machining mai kara gaba

Matsalolin DFM don wasa redrawing mai kyau

DFM ko Design for Manufacturability yana da mahimmanci idan ya zo ga samun kyakkyawan sakamako daga aikin CNC ba tare da fuskantar matsaloli ba daga baya kamar sake tsara sassa a minti na ƙarshe, ɓacewar lokacin ƙarshe, ko ma'amala da ƙirar da ta fi rikitarwa. Samun siffar ɓangaren daidai daga farkon yana taimakawa kauce wa waɗannan yankunan da ke da wuyar gaske wanda ke ɗaukar lokaci mai tsawo don aiki. Ka yi tunanin aljihunan da ke cikin ciki, da ƙananan ramuka, da kuma yankunan da aka yanke waɗanda za su iya cinye lokacin aiki na kimanin 40% kuma kawai su lalata kayan aiki da sauri. Lokacin da aka tsara sassan tare da daidaitattun fasali waɗanda ke aiki da kyau tare da kayan aikin yankan na yau da kullun, babu buƙatar kayan aiki na musamman wanda ke adana kuɗi akan saiti mai yiwuwa rage farashin a wani wuri kusan 25%. Zaɓin kayan yana da ma'ana don daidaita abin da ɓangaren yake buƙatar yi da yadda sauƙi yake aiki. Alal misali, 6061 aluminum da titanium. Aluminum yana yanka kusan 30% cikin sauri kuma yana aiki sosai don yawancin abubuwa a waje da aikace-aikacen sararin samaniya inda buƙatun ƙarfi ba su da tsananin gaske. Kuma a duk lokacin da zai yiwu yin amfani da kayan aiki uku maimakon zaɓuɓɓukan ƙira da yawa yana sauƙaƙa shirye-shirye, rage kurakurai yayin samarwa, kuma yana sa abubuwa su yi sauri gaba ɗaya.

Takonar Tashin Kudin: Haɗawa na Kammalawa na Kudin da Kudin CNC da Kudin

Lokacin da aka saita ƙayyadaddun haƙuri, yana da mahimmanci don daidaita abin da ɓangaren yake buƙatar aiki yadda ya kamata da abin da za a iya samarwa. Yin nisa fiye da inci 0.005 yawanci yana nufin biyan kuɗi don kayan aiki na musamman, tsawon lokacin saiti, da kuma yawan ingancin inganci. Zai fi kyau a mai da hankali kan haƙuri mai ƙarfi kawai inda suke da mahimmanci kamar kujerun ɗaukar hoto ko wuraren hatimi, kiyaye daidaitattun ƙayyadaddun inci 0.01 a wani wuri. Wannan hanyar da ta fi hankali yawanci tana adana tsakanin kashi 15 zuwa 35 cikin ɗari a kan farashin kayan aiki ba tare da cutar da aikin ba tunda yawancin sassan kasuwanci suna aiki daidai cikin damar CNC na yau da kullun. GD&T yana da kyau don yin bayani dalla-dalla yadda wani sashi zai dace da aiki, rage waɗannan yanayin takaici inda mutane daban-daban ke fassara zane daban kuma suna buƙatar sake aiki. Kuma ku tuna ku duba idan haƙuri yana da ma'ana tare da wanda zai yi aiki da ɓangaren a lokacin gwajin samfurin, ba da zarar abubuwa sun riga sun fito daga layin samarwa ba.

Matsaloli na CNC na Fasaha ta Hanyar Materia

Takonar Kullum Dukkaci na Tafiyar Dukkaci da Kullum Dukkaci na Tafiyar Dukkaci ta Hanyar Materia

Karakatun kayan abu suka taka mahimmanci mai yawa wajen fahimtar wani abu ne ya zama mafi kyau don amfani da kayan aiki, kuma kuma yadda mu yi amfani da kayan aiki na cuttting, kuma yadda mu yi amfani da kayan aiki na cooling a lokacin da mu ke soya. Misali, kayan abu na aluminum suka yi aiki da kyau da kayan aiki na carbide na high speed ba tare da coating ba saboda su taimaka wajen kare kariya na buildup. Amma stainless steel ya nuna hanyar farko – suka bukata carbide mai tsoro don yin aiki da shi, kuma masu amfani suna yi amfani da kayan aiki na moderate speeds domin kare kariya na work hardening. Kuma akwai kayan abu mai gaba daya kamar Inconel wanda suka faruwa da kariya ta yau da kullum. Wadannan kayan abu suna bukata halayen da suka dace da su kamar ceramic ko cubic boron nitride (CBN) inserts, kuma kuma yadda mu yi amfani da feed rates da suka dace da su wanda suka kashe 0.15 mm per tooth, kuma kuma yadda mu yi amfani da heat da kariya ta yau da kullum yana zama babban muhimmi. Kuma kuma yadda mu yi amfani da cooling suka faruwa da kariya ta yau da kullum wajen yadda mu ke soya. Flood coolant ya zama mafi kyau don aluminum parts, amma lokacin da mu ke soya da titanium components, masu amfani suna yi amfani da high pressure through-tool systems wanda suka ci gaba da 1000 psi domin kare kariya na temperature. Lokacin da mu kawo dukkan wannan bayanin da suka dace da kayan abu da suka dace da su kuma mu kawo su daidai, an nuna cewa yana kare kariya na cycle times a lokacin da aka soya a duniya, kadan lokacin da suka kare kariya na 24% waccan bayanin da aka samu daga various aerospace prototyping projects a lokacin da suka gabata.

Samun Kammala Ta Fuskanta Na Musamman A Duk Madaidaici Na Aluminum, Stainless Steel, da Exotics

Samun daidaitattun kayan aiki na ƙasa yana zuwa ne da daidaita tsarin maimakon manne wa saitunan girma ɗaya. Alal misali, aluminum saboda yana narkewa da sauƙi, muna bukatar mu cire waɗannan kwakwalwan nan da nan don kauce wa matsaloli kamar haushi da shafawa. Amma ƙarfe mai ƙarfe yana aiki dabam. Mun yawanci nufin a kusa da 35% radial alkawari a nan da kuma ci gaba da gama wucewa karkashin game da 0.05 mm don samun cewa nice goge look ba tare da wani burrs. Idan ana aiki da ƙarfe na jan ƙarfe ko kuma filastik mai zafi, kayan aiki masu kaifi suna da muhimmanci. Wani abu kamar 15 digiri rake kwana taimaka hana deformation matsaloli da kuma rage burring muhimmanci. Bayan an gama aiki, muna bincika waɗannan ƙimar Ra ta amfani da fasahar auna ba tare da tuntuɓar ba. Wadannan yawanci suna fadowa a wani wuri tsakanin 0.4 da 3.2 micrometers, wanda ke da mahimmanci idan ana ma'amala da hatimi mai ƙarfi ko haɗin gani. Hakanan, zafin jiki yana taka muhimmiyar rawa. Injin yana bukatar lokacin dumi mai kyau kuma zafin jiki na sanyaya ya kamata ya kasance cikin + ko - 2 digiri Celsius. Wannan kwanciyar hankali na thermal shine abin da ke ba mu damar kula da daidaito na matakin micron da ake buƙata don abubuwa kamar ƙirar gani ko manyan kayan aikin ma'auni.

Takonin Tattalin Kafin Aiki don Samun Dabara na Gaba da Dabara a CNC Machining

Kwamfatin Mashi, Tsarin Kafa da Kafa, da Tsarin Kafa na Hanya

Samun daidaito na matakin micron ba kawai game da samun inji mai kyau ba; yana buƙatar tsananin sarrafa tsari a ko'ina. Shaguna suna buƙatar bincika daidaitattun spindle a kai a kai, tabbatar da yadda axes ke motsawa, da kuma amfani da diyya mai yawa don kiyaye daidaiton siffar a tsawon lokaci. Yadda aka yi amfani da shi da kyau yana da muhimmanci. Tsarin tsari tare da tsananin tsauri na iya ɗaukar sassa masu rikitarwa yayin da har yanzu suna kiyaye abubuwa masu ƙarfi don hana rawar jiki haifar da magana ko matsalolin matsayi yayin aiki. Amma zafin jiki yana da muhimmanci. Ko da ƙananan canje-canje a yanayin yanayi sama ko ƙasa da +/- 1 digiri Celsius zai canza girman gaske, musamman lokacin aiki tare da kayan kamar aluminum waɗanda ke faɗaɗa kaɗan lokacin da aka dumama (kimanin micrometers 23 a kowace mita a kowace digiri Celsius). Wannan shine dalilin da ya sa shaguna da yawa ke aiwatar da dabarun sarrafa zafin jiki kamar gudanar da zafin jiki kafin fara samarwa da kuma amfani da tsarin da aka rufe don kiyaye yanayin sanyaya mai daidaito. Yawancin ayyukan sarrafawa masu mahimmanci suna bin waɗannan nau'ikan jagororin kwanciyar hankali na thermal waɗanda aka gwada kuma aka tabbatar dasu a duk faɗin masana'antar.

Tasfirin a Wajen Tsarin da Tattalin Kuskuren Da Zaman Lissafi

Yaduwa da ayyukan da suka hada da zaman lafiya (real time feedback) zuwa cikin CNC machining, yana canza dukkan abubuwan da suka fito daga ayyukan da suka dace da kafin kari (open loop operation) zuwa abu mai kyau da yawa wanda ake kira shi closed loop control. A yanzu, makinolin da suka faru a rana suka gaba da touch probes da laser scanners wanda suka yi amfani da su don tattauna dimenshinai idan abubuwan suka faru. Wadannan abubuwan suka gano idan dimenshinai suka ci gaba daga mahimman da suka dace, wanda ke kamar plus ko minus 0.005 millimeters. Idan suka gano, aljebra ta zama ta saita tsarin kofin abinci (tool paths) ko ta yi wasu saiti na muhimmi sannan kuma ba su da kuskure mai yawa. Kullum baya suka haɗa statistical process control zuwa cikin ayyukan su. Wannan yana taimaka wajen gano abubuwan da suka dace kamar kuskure na kofin abinci (tool wear) idan suka faru kamar yanzu kuma ba su da kuskure a cikin abubuwan da suka faru. Kullum masu sanyi sun bayyana neman da suka dace kuma. Wasu matakan da suka dace da kofin abinci (adaptive compensation methods) wanda kofin abinci suka saita su da kofin abinci (tools) a matsayin su da kofin abinci (wear sensors) suka dace da kuskure (scrap rates) da kamar 40%. A hakanan, wadannan aljebra mai kyau suka dace da kofin abinci (surface finishes) da suka dace da kofin abinci (Ra) da kamar 0.4 micrometers a cikin duk kofin abinci (production batches), wanda ke muhimmi ga ayyukan da suka dace da kofin abinci (high precision manufacturing).

Kiyaye na bayan Kafin-Karanta da Kiyaye na Kwalitas

Binciken bayan aiki yana da mahimmanci don tabbatar da sassan suna aiki yadda yakamata, suna bin ƙa'idodi, kuma suna da ƙarfi a cikin lokaci. Babban gwajin ya ƙunshi bincika girma da waɗannan manyan na'urorin auna daidaito, kimanta yadda farfajiyoyi suke da santsi da na'urori na musamman, da kuma tabbatar da kayan ta hanyar gwajin taurin ko kallon sunadarai. Sa'ad da masana'antun suka yi amfani da fasahar sarrafa lissafi, za su iya rage lahani da kusan rabi a aikin da ya fi dacewa domin waɗannan hanyoyin suna gano matsaloli tun da wuri kafin wani abu ya faru. Yin cikakken bincike yana da muhimmanci. Rahotannin dubawa, rajista lokacin da wani abu bai cika takamaiman bayanai ba, da kuma bin diddigin inda kayan suka fito duk suna taimakawa inganta ayyukan da wucewa audits daga ka'idoji kamar ISO, AS9100, ko FDA. Musamman ma da muhimmanci ga sassa da ake amfani da su a cikin jiragen sama ko na'urorin kiwon lafiya, gwajin da ba ya lalatawa ya zama mahimmanci. Hanyoyi kamar duba mai sanya fenti ko kuma hasken X na micro focus suna ba da ƙarin duba inganci ba tare da canza yadda sashi yake ba ko aiki.