Nghiên cứu, thiét kế, chế tạo máy đo độ nhám tự động

NGHIEN CUXJ, THIET KE, CHE TAO MAY DO BQ N H A M TIT DQNG Nguydn Vdn Vinh, Nguy in Thj Phuvng Mai, Nguyen Thj Kim Ciic Bd mem Ca Chfnh xdc ct Quang hge, Vien Ca khi, Trudng Dgi hoc Bdch khoa Hd Ngi Tdm tdt: Nhdm be mat Id mgt chi tieu quan trgng di ddnh gid chdt lugmg sdn phdm co Vih Nam hien nax chua cd ca sa ndo che tgo vd sdn xudt cdc thiet bi nhdm be mat Do vay viec chi tgo mdy nhdm kiiu tiep xuc diiu kien kinh te ciia nuoc ta lii?n cho phep gidm kinh phf cho ngeinh cdng nghiep ca chi tgo nhap khau mdy ciia cdc hdng nuoc ngodi vdi chi phf cao Trong bdi bdo ndy trinh bdy cdc kit qud nghien ciru thiet ke che tao mdy nhdm kiiu dien cdm vdi todn bg cum ddu do, cdm bien, h? thong mach diin dim khiin, kit ndi mdy tfnh nhdm phuc vu quy trinh kiim tra chdt lugmg vd gop phdn hg gid I sdn phdm ca Abstract: Surface roughness is an important character to estimate mechanical products In Vietnam, iintU now there is no where can produce and manufacture the Roughness tester Therefore, manufacturing automatic roughness tester condition in our country now allow to reduce funding for the manufacturing industry when imported equipment from the other countries with high cost This article presents results in designing and manufacturing the roughness tester, which has the inductance type sensors with stylus tip, inductance sensors, control circuit system Connecting computer to computer receive at testing process and lower cost contributed to engineering products I Gidl THIEU Dac diem ciia may nham bang dau dd tiep xuc Mdy nhdm 1dm viec ty dgng dugc thidt kd bao gdm h? thdng co khf chfnh xac kdt hop vdi mach didu khidn ty ddng vd kdt ndi may tfnh Ba khdi chiire nang hop ba bg phan CO bdn cua thiet bj: He thdng co khf ddn ddng ddu vd chuydn ddi - Cdc mach dien tir xir ly tfn hieu vd didu khidn qud trinh bdng may tfnh - Phdn mdm xir ly sd lieu vd hidn thj, bidu dien thdng sd nhdm Trong thidt bi nay, nhay vd dg chi'nh xdc cdn phai nhd hon pm, dd viec chuySn ddi dong vai trd quan trgng nhdt Bg cam bidn hien khdng dugc ban tren thi tnrdng II CAu TRUC MAY DO 146 Mnch ngudn tno tfn hi6u Sin PhSn Kii ly tfn hieu Nguyen ly va hoat ddng ciia may Cam biS'n nham dugc md td trdn hinh 1: Dau tiep Diiu dien cam xiic vdi chi tiet va djch chuyen ngang dya Bd phan D6ng ca trdn CO" cau vi'tme dai dc Dugc gan vdi 06 chuyen djch chuyen Vi dieu khiSn dfiiADC ddng ca dien mdt chieu Djch chuyen 12 bil Cam bifi'n thdng dii'ng ciia ddu qua co cau khuyech goc dai CO khf (he thdng canh tay ddn), Djch chuyen ciia dau theo chieu cao nhap May tfnh nhd bd mat tao ndn su bien ddi khe hd tii' •Xu ly sd' lifiu Hien Ihi • Di^u khii'n ciia hai cudn cam dugc gdn vi sai trdn cum ddu (cdm bien dien cdm) Khi khe hd tii' Mtiy in thay ddi, do hieu dien the giira hai dau hai cudn cam thay ddi Sy sai khdc hieu dien the giira hai cudn cam dugc chuyen qua bd khuyech dai, sau dd tfn hieu qua bg Igc nhieu dugc chuyen qua mach chuyen ddi ADC 12 bit vd bg xu ly tfn hieu Cdc tfn hieu ndy sau da dugc xu ly se dugc chuyen den mdy tfnh de tfnh todn va hidn thj man hinh thdng qua bd dem I/O Mdy tfnh 1dm nhidm vii didu khien vd tfnh todn kdt qua de dua dugc cac I Macli khuech dai & boi dp Hinh Sff nguyen ly may Hinh Anh dau da che tao duffc \ ^ thdng sd nhdm vd ve dd thj bien dang be mat 2.1 Cum dau * Miii Id bd phdn di chuyen tryc tiep tren bd mat vdt phdt hidn nhirng sai lech ve chieu cao nhdm vi vay rat chong mdm dd bi gay vd nen yeu cau cd bdn kinh cong nhd chju mdi mdn cao cung virng vd bien dang deo Dua tren cdc tieu chudn thidt kd miii cua Nhat vd thye nghiem thidt bi da chd tao dugc vdi cdc thdng sd nhu hinh 3: vat lieu hgp kim, chieu ddi 1= 50mm miii cd bdn kfnh = 6pm, gdc dau : 60° lue cua ddu F=0,08m * He thdng khuydch dai ca khf Ty sd truyin ca chi'nh Id ty sd giira dich chuyIn cua dlu x va khe hd tir y Yeu cdu tfnh todn ehidu ddi phdn cdm bien b cho ddu quay dugc gdc 10° ma khdng vudng hai cudn cdm (Hai cudn cam ban chd gdc quay ciia can do) Theo hinh ta cd mdi quan he giira bidn thien dich chuydn ciia ddu va bien thien khe hd cdm bien 147 IMIllll I ^1/ , 4J Jf^^^^^flL Ax , , Ax' A)' = h.tg a=h-' — = h * -; c h+d * lie thdng hai cudn ciim mdc vi sai Cuon diiy loi ferit cd khe bd khdng khf a thay doi, hi bo phan chuyen tfn hieu co khf tin hii'u dii-n Hai cugn day dugc mdc theo kieu vi ninh Cum dau sai Qk iridl tidu phi luyen cua hai cuon ( Ihl diiy vii lang phan gidi Vdi hai cudn cam dugc mac vi sai voi hai bien trd tap thdnh mdt mach cdu Cuon 'M'i, cam dugc chd tao vdi sd vdng n= lOOO i'"3&*W vdng vd dudng kfnh day qudn d