Kuroverwa KweSimbi Yakaomeswa NePCBN Cutter

Kurovera kwesimbi yakaoma nePCBN cutter

Mumakore gumi apfuura, kukwizwa chaiko kwesimbi dzakaomeswa nepolycrystalline cubic boron nitride (PCBN) kwave kutsiva kukuya kwechinyakare zvishoma nezvishoma. Tyler Economan, maneja weinjiniya kuIndex, USA, akati, "Kazhinji, kukuya grooves inzira yakatsiga inopa huchokwadi hwepamusoro pane kukora. Nekudaro, vanhu vachiri kuda kukwanisa kupedzisa workpiece pane lathe. Yakasiyana-siyana yekugadzirisa inodiwa."

Zvishandiso zvakasiyana-siyana zvakaomeswa zvinosanganisira simbi yekumhanya, simbi inofa, inotakura simbi uye alloy simbi. Masimbi ane ferrous chete anogona kuomeswa, uye maitiro ekuomesa anowanzo kuiswa kune yakaderera kabhoni simbi. Kuburikidza nekuomeswa kwekurapa, iyo yekunze kuomarara kweiyo workpiece inogona kuitwa yakakwirira uye inopfekwa, nepo mukati mune zviri nani kuoma. Zvikamu zvakagadzirwa nesimbi yakaoma zvinosanganisira mandrels, ekisero, zvinobatanidza, mavhiri ekutyaira, camshafts, magiya, bushings, drive shafts, mabearings, nezvimwe zvakadaro.

Zvisinei, "zvakaoma zvinhu" ihama, kuchinja pfungwa. Vamwe vanhu vanofunga kuti workpiece zvinhu zvine kuoma kwe40-55 HRC zvinhu zvakaoma; vamwe vanotenda kuti kuoma kwezvinhu zvakaoma kunofanira kuva 58-60 HRC kana kupfuura. Muchikamu ichi, maturusi ePCBN anogona kushandiswa.

Mushure mekuomeswa kweiyo induction, iyo nzvimbo yakaomeswa yakaomeswa inogona kusvika 1.5mm gobvu uye kuomarara kunogona kusvika 58-60 HRC, nepo zvinhu zviri pasi pedenga repamusoro kazhinji zvakapfava. Muchiitiko ichi, zvakakosha kuve nechokwadi kuti yakawanda yekucheka inoitwa pasi pepamusoro pevhu rakaoma.

Zvishandiso zvemuchina zvine simba rakakwana uye kusimba inzvimbo inodiwa yekugezera yezvikamu zvakaomarara. Sekureva kweEconoman, “Kusimba kwechishandiso chemuchina uye kuwedzera simba kwesimba, ndiko kuwedzera kukwenenzvera kwechinhu chakaoma. Nezve workpiece zvinhu nekuoma kweanopfuura makumi mashanu HRC, akawanda maturusi emwenje maturusi haasangane neinodiwa yekucheka mamiriro. Kana simba remuchina (simba, torque, uye kunyanya kuoma) rakapfuura, machining haagone kupedzwa zvinobudirira.

Rigidity inonyanya kukosha kune workpiece inobata chigadziro nokuti iyo yekuonana pamusoro pekucheka kwekucheka ine workpiece yakakura panguva ye grooving process, uye chigadziro chinoshandisa simba guru pane workpiece. Kana uchisungirira simbi yakaomeswa yekushanda, yakafara clamp inogona kushandiswa kuparadzira iyo yekusunga pamusoro. Paul Ratzki, maneja wekushambadzira weSumitomo Electric Hard Alloy Co., akati, "Zvikamu zvichagadzirwa zvinofanirwa kutsigirwa zvakasimba. Paunenge uchigadzira zvinhu zvakaomeswa, vibration uye kudzvanywa kwechishandiso kunogadzirwa kwakakura zvakanyanya kupfuura kana uchigadzira akajairwa maworkpieces, izvo zvinogona kukonzera workpiece clamping. Haikwanise kubhururuka kunze kwemuchina, kana kukonzera kuti blade yeCBN iputse kana kutopwanya. "

Iyo shank inobata grooving insert inofanira kuva pfupi sezvinobvira kuderedza overhang uye kuwedzera kusimba kwechishandiso. Matthew Schmitz, maneja weGRIP zvigadzirwa kuIsca, anonongedza kuti kazhinji, maturusi e monolithic akanyanya kukodzera kugezesa kwezvinhu zvakaomarara. Nekudaro, iyo kambani inopawo modular grooving system. "Iyo modular shank inogona kushandiswa mumamiriro ekugadzira apo chishandiso chinowanzo kukundikana," anodaro. "Haufanire kutsiva shank yese, unongoda kutsiva chinhu chinodhura. Iyo modular shank inopawo akasiyana machining sarudzo. Iskar's Grip modular system inogona kuiswa mune dzakasiyana siyana zvigadzirwa. Unogona kushandisa chibatiso chine 7 mablades akasiyana emitsara yechigadzirwa 7 kana chero nhamba yemablades ekugadziriswa kwakasiyana Mutsetse wechigadzirwa mumwechete une slot wide."

Sumitomo Electric's toolholders yekubata CGA-mhando inoisa inoshandisa yepamusoro-clamping nzira inodhonza blade kudzoka mumubati. Ichi chibatiso chinewo siruu yekumisa parutivi kubatsira kuvandudza kugadzikana uye kuwedzera hupenyu hwematurusi. Rich Maton, mubatsirimaneja wedhipatimendi redhizaini yekambani, akati, "Ichi chibatiso chakagadzirirwa grooving yeakaomeswa workpieces. Kana blade ikafamba mumubati, blade inopera nekufamba kwenguva uye hupenyu hwekushandisa hunochinja. Nekuda kwepamusoro-kubereka machining zvinodiwa zvemotokari. indasitiri (senge 50-100 kana 150 workpieces pakucheka-cheka), kufanotaura kwehupenyu hwematurusi kwakakosha zvakanyanya, uye shanduko muhupenyu hwematurusi inogona kukanganisa kugadzirwa. "

Sekureva kwemishumo, Mitsubishi Materials 'GY akateedzera Tri-Lock modular grooving system inofananidzwa mukuomarara kune akabatanidzwa blade chucks. Iyo sisitimu inobata yakavimbika mashizha ekugezera kubva kumativi matatu (peripheral, kumberi nepamusoro). Magadzirirwo ayo maviri ekugadzirisa anodzivirira blade kuti irege kubviswa panguva ye grooving: V-shaped projection inodzivirira blade kuti iende kumativi; kiyi yekuchengetedza inobvisa kuenderera mberi kweblade kunokonzerwa nekucheka simba panguva ye slot machining.

Inowanzo shandiswa grooving insert yezvikamu zvesimbi zvakaomeswa zvinosanganisira nyore masikweya kuisa, kugadzira kuisa, slotted kuisa, nezvimwe zvakadaro. Kazhinji, magaro akachekwa anodiwa kuti ave nepamusoro pekupedzisira nekuti ane chikamu chekusangana, uye mamwe maO-mhete kana snap ring grooves. Sekureva kwaMark Menconi, nyanzvi yechigadzirwa paMitsubishi Materials, "Maitiro aya anogona kupatsanurwa kuita mukati dhayamita groove machining uye ekunze dhayamita groove machining, asi mazhinji maoparesheni anoda kucheka kwakanaka, kusanganisira kujeka kubata chaiko kubva pakadzika 0.25 mm yekucheka. Cheka kusvika chidimbu chakazara nehudzamu hunosvika 0.5mm."

Iyo grooving yesimbi yakaomeswa inoda kushandiswa kwezvishandiso zvine kuoma kwepamusoro, zviri nani kupfeka kuramba uye yakakodzera geometry. Chinokosha ndechekuona kuti carbide insert, ceramic insert kana PCBN insert inofanira kushandiswa. Schmitz akati, "Ini ndinogaro sarudza ma carbide ekuisa kana ndichigadzira maworkpieces ane hardness pazasi 50 HRC. Kune maworkpiece ane kuoma kwe50-58 HRC, ceramic inoisa isarudzo ine hupfumi zvakanyanya. Chete kana iyo workpiece CBN inoisa inofanirwa kutariswa nekuomarara kusvika ku58 HRC. Iwo maCBN anoisa anonyanya kukodzera kugadzira zvinhu zvakakwirira-zvakaoma nekuti michina yekugadzira haisi yekucheka zvinhu asi chishandiso / workpiece interface. Nyusa zvinhu.

Pakurovera kwesimbi dzakaomeswa zvikamu zvine kuoma kweinopfuura 58 HRC, chip control harisi dambudziko. Sezvo yakaoma grooving inowanzoshandiswa, machipisi akafanana neguruva kana zvidimbu zviduku uye anogona kubviswa nemaoko. Sumitomo Electric's Maton akati, "Kazhinji, rudzi urwu rwemaswafi runopwanyika nekuparara kana ichinge yarova chero chinhu, saka kubata kweiyo swarf ine workpiece hakukanganise workpiece. Kana iwe ukabata swarf, ivo vanopwanya muruoko rwako."

Chimwe chezvikonzero nei kuisirwa kweCBN kwakakodzera kucheka kwakaoma ndechekuti kunyangwe kupisa kwavo kupisa kwakanaka kwazvo, mashandiro ekugadzirisa anodzikiswa zvakanyanya muchiitiko chekuchinja kwekushisa. Economan anoti, "Kutaura zvazviri, kana iyo CBN yekuisa ikasangana neiyo workpiece zvinhu, inoburitsa kupisa kwekucheka pamuromo, asi nekuti iyo CBN yekuisa haigone kuchinjika kune tembiricha shanduko, zvakaoma kutonhorera zvakakwana kuchengetedza nguva dzose. tembiricha. State. CBN yakaoma kwazvo, asi zvakare ine brittle uye inogona kuputika nekuda kwekushanduka kwekushisa. "

Kana uchicheka simbi zvidimbu zvine kuomarara kwakaderera (senge 45-50 HRC) ine simende carbide, ceramic kana PCBN inoisa, machipisi anogadzirwa anofanira kunge ari mapfupi sezvinobvira. Izvi zvinonyatsobvisa kupisa kwekucheka mumudziyo wemidziyo panguva yekucheka nokuti machipisi anogona kutakura huwandu hwakawanda hwekupisa.

Iskar's Schmitz inokurudzirawo kuti chishandiso chigadziriswe mu "inverted" state. Akatsanangura, “Pakuisa mudziyo pamuchina, mudziyo unofarirwa nemugadziri wemuchina unoiswa nekucheka blade kumusoro, sezvo izvi zvichibvumirakutenderera kweworkpiece kuti iite yakaderera kudzvanywa pane muchina njanji kuchengetedza muchina wakagadzikana. Nekudaro, kana blade ikachekwa kuita workpiece zvinhu, machipisi akaumbwa anogona kuramba ari pablade uye workpiece. Kana chibatiso chikatenderedzwa uye mudziyo ukakwidziridzwa pasi, blade haizoonekwe, uye kuyerera kwechip kunobva kwatiza kubva munzvimbo yekucheka pasi pechiito chegiravhiti. "

Kuomeswa kwepamusoro inzira iri nyore yekuvandudza kuoma kwesimbi yakaderera kabhoni. Nheyo ndeyekuwedzera iyo kabhoni yemukati pane imwe kudzika pasi pepamusoro pezvinhu. Kana iyo grooving yakadzika ikapfuura ukobvu hwepamusoro hwakaomeswa layer, mamwe matambudziko anogona kubuda nekuda kwekuchinja kwe grooving blade kubva kune yakaoma zvinhu kuenda kune yakapfava. Kuti izvi zviitike, vagadziri vezvishandiso vakagadzira akati wandei blade mamakisi emhando dzakasiyana dzeworkpiece zvinhu.

Duane Drape, maneja wekutengesa kuHorn (USA), akati, "Kana uchichinja kubva pachinhu chakaoma kuenda kune chakapfava, mushandisi haagare achida kushandura blade, saka isu tinofanirwa kutsvaga chishandiso chakanakisa cherudzi urwu rwemachining. Kana cemented carbide insert ikashandiswa, ichasangana nedambudziko rekunyanya kupfeka kana blade ikacheka nzvimbo yakaoma. Kana CBN inopinza yakakodzera kucheka zvinhu zvakakwirira-yakaoma ikashandiswa kucheka chikamu chakapfava, zviri nyore kukuvadza blade. Tinogona kushandisa compromise: high hardness carbide inserts + super lubricated coatings, kana kuti zvinyoro CBN isa mamakisi + ekucheka anoisa akakodzera kucheka zvinhu zvakajairika (pane kuomesa machining).

Drape akati, "Unogona kushandisa CBN inoisa kucheka zvinobudirira zvishandiso zvebasa nekuoma kwe45-50 HRC, asi blade geometry inofanirwa kugadziriswa. Yakajairika CBN inoisa ine yakaipa chamfer pane yekucheka kumucheto. Iyi yakashata chamfer CBN yekuisa yakapfava kumuchina. Kana iyo workpiece zvinhu zvichishandiswa, zvinhu zvichava nekudhonza-kunze kwekuita uye hupenyu hwekushandisa huchapfupiswa. Kana iyo CBN giredhi ine yakaderera kuomarara ikashandiswa uye geometry yekucheka kumucheto ikashandurwa, iyo workpiece ine kuomarara kwe45-50 HRC inogona kucheka zvakabudirira.

Iyo S117 HORN grooving insert yakagadziridzwa nekambani inoshandisa PCBN tip, uye kudzika kwekucheka kunosvika 0.15-0.2 mm kana giya regeji rakanyatsochekwa. Kuti uwane kupedzisa kwepamusoro, blade ine ndege yekutsvaira pane imwe neimwe yekucheka kumativi ose maviri.

Imwe sarudzo ndeye kushandura matanho ekucheka. Zvinoenderana neIndex's Economan, "Mushure mekucheka nepakati yakaomeswa, maparamita makuru ekucheka anogona kushandiswa. Kana iyo yakaomeswa kudzika ingori 0.13mm kana 0.25mm, mushure mekucheka nekudzika uku, zvingave mablades akasiyana anotsiviwa kana zvakadaro Shandisa blade imwechete, asi wedzera maparamita ekucheka kusvika padanho rakakodzera."

Kuti uvhare huwandu hwakakura hwekugadzirisa, PCBN blade mamakisi ari kuwedzera. Magiredhi ekuoma kwepamusoro anobvumira kukurumidza kucheka kumhanya, nepo mamakisi ane kuoma kuri nani anogona kushandiswa munzvimbo dzisina kugadzikana dzekugadzirisa. Kune kuenderera kana kukanganiswa kucheka, akasiyana PCBN yekuisa mamakisi anogona zvakare kushandiswa. Sumitomo Electric's Maton yakaratidza kuti nekuda kwehunyoro hwePCBN maturusi, inopinza yekucheka mipendero inowanzoita chipping kana machining simbi yakaoma. "Tinofanirwa kuchengetedza kumucheto, kunyanya mukukanganisika kucheka, mupendero wekucheka unofanirwa kugadzirirwa kupfuura mukuramba uchicheka, uye kona yekucheka inofanira kunge yakakura."

Iskar ichangoburwa IB10H uye IB20H mamakisi inowedzera kuwedzera Groove Turn PCBN chigadzirwa mutsara. IB10H igiredhi rakanaka-grained PCBN yepakati nepamusoro-soro inoenderera mberi yekucheka kwesimbi yakaoma; nepo IB20H iine yakanaka uye yepakati saizi yezviyo PCBN tsanga, ichipa kupfeka kwakanaka kuramba uye kukanganisa kupikisa. Chiyero chinogona kumira kuomarara mamiriro esimbi yakaomeswa yakakanganiswa kucheka. Iyo yakajairika yekutadza maitiro ePCBN chishandiso inofanira kunge iri iyo yekucheka mupendero inoperapane kuerekana kutsemuka kana kutsemuka.

Iyo BNC30G yakavharwa PCBN giredhi yakaunzwa neSumitomo Electric inoshandiswa kuvhiringika grooving yesimbi yakaoma workpiece. Nekuenderera mberi kwegrooving, kambani inokurudzira BN250 yayo universal blade giredhi. Maton akati, “Pakuramba uchicheka, blade inochekwa kwenguva yakareba, izvo zvinogadzira kupisa kwakanyanya. Nokudaro, zvinodikanwa kushandisa blade nekudzivisa kupfeka kwakanaka. Panyaya yepakati grooving, blade inoramba ichipinda uye ichibuda ichicheka. Iine simba guru pamuromo. Naizvozvo, zvinodikanwa kushandisa blade nekusimba kwakanaka uye inogona kumira mukati menguva. Pamusoro pezvo, blade coating inobatsirawo kuwedzera hupenyu hwekushandisa. "

Pasinei nerudzi rwegoroko riri kugadzirwa, maworkshop aimbovimba nekukuya kuti apedze simbi dzakaomeswa zvikamu zvinogona kushandurwa kuita grooving nePCBN maturusi ekuwedzera kubereka. Hard grooving inogona kuwana dimensional yechokwadi inofananidzwa nekukuya, uku ichideredza zvakanyanya nguva yekugadzira.