NGHIEN cufu - TRAO B6\
z 7^ y . /3
LTNG DUNG CONG NGHE CAD/ CAM/ CAE THI^T KE 3D CAP BANH RANG HYPOIT C O A BO TRUYEN LU'C C H I N H
APPLIED TECHNOLOGY CAD/ CAM/ CAE DESIGN 3D MODELS OF HYPOID GEARS OF MAIN TRANSMISSIONS
Tran Q u a n g H a n h ' , Nguyin Van CudtigS Tru-ong T a t Tai^
'Trudng Cao ddng Kinh te Ky thugt, Dgi hpc Thai Nguyen
^Trudng Dai hpc Giao thdng Van tai
^Trudng Dgi hpc Su phgm Ky thudt Hung Yen
T O M T A T
Bdi bdo gidi thiiu ve phuang phdp thiet ke 3D bdnh rdng hypoit ciia bg truyen luc chinh.
Ddy Id buac quan trgng de cd cdc md hinh 3D bdnh rdng diing trong md phdng ddng luc hgc vd la ca sd quan trgng de gia cdng bdnh rdng hypoit tren cdc mdy CNC.
Tir khda: Md hinh 3D bdnh rdng hypoit.
ABSTRACT
This paper describes a design method for 3D models of hypoid gears in main transmissions.
This step is very important to make the 3D models to use in simulation dynamics and it is an essen- tial foundation for machining hypoid gears on CNC machines.
Keywords: 3D models of hypoid gears.
1. DAT VAN DE vd se phdt trien khi cdng nghiep phu ttg sdn xudt d td ttong nudc dang dugc hinh thanh va cd dinh Banh rang hypoit, bd truyen Iyc chinh la hudng di len. Khdng chi viec nghien ciiu che tao loai chi tiet mdy ca khi cd ket cdu phiic tgp, tinh md tinh todn thiet ke, lap quy trinh cdng nghe che todn thiet ke nhieu thdng sd, cd quy trinh cdng tao d Viet Nam, ciing chua thyc su hoan chinh, nghe gia cdng co khi phiic tap, can gia cdng tten cdn it dp dung cdc phdn mem chuyen dung cho cac mdy chuyen dimg (Gleason Hypoid Gear), khau tinh toan, thiet ke, dieu chinh ty ddng theo cd dp chinh xac cao. Nghien ciiu de tinh toan, chucmg trinh. Dieu dd lam cho chdt lugng san thiet ke va che tgo banh rang hypoit Id mdt vdn phdm banh rang thap, gia thdnh cao va khdng de can thiet. Dgc biet hien nay, viec che tao banh dap iing dugc nhu cdu ciia sdn xuat ciing nhu thi rang hypoit cd mgt thi trudng vdi tiem nang Idn trudng ddi hdi. Trong khi dd tren the gidi, viec ^
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NGHIEN dJfU-TRAODOl
gia cdng bdnh rdng da dugc iing dyng cac cdng nghe mdi, tien tiln, nhu: Tinh todn thilt ke banh rang bdng cdc phdn mim chuyen dyng, gia cdng banh rdng tren may CNC,...
2. P H U O N G PHAP T H I E T Kfi BANH RANG H Y P O I T BQ TRUYEN LU^C CHINH
Thilt k l va chl tao bdnh rdng hypoit ludn Id vdn d l dang dugc quan tdm, nghien ciiu, nhdm ddp ling cdc yeu cdu cua cdc bd truyen bdnh rang ttong mdy bay tryc thang, d td, xe may, bd giam tdc vd ttong nhilu ngdnh cdng nghiep khdc. Ly thuyit nghien ciiu chuyen sdu ve tgo hinh be mat
bien dang rang hypoit da dugc trinh bay trong cdc cdng trinh [3], [4]. C a sd thilt ke cac banh rdng hypoit dugc trinh bay trong cdc tai lieu [l-5j.
Thilt k l bd truyin bdnh rdng hypoit dya tren viec ling dung thudt toan tdng hgp vi tri [6] va viec phan tich vung tiep xiic rang TCA (Tooth Contact Analysis) de dat dugc mdt dudng tilp Xlic cd hudng phii hgp.
LTng dung cu the cdng nghe CAD/CAM/
CAE ttong thilt k l bd truyin lyc chinh tten co sd ly thuyet ciia cac cdng trinh tten, dya vao ban thdng sd cap bdnh rang Hypoid nhu Bang 1.
Bdng 1. Thong sd ca bdn thiit ki be mat bien dgng rdng cap bdnh rdng hypoid
TT 1 2 3 4 5 6 7 8 9 10 11 12
Ten thong so So rana
Ty so truyen Hudng xo5n ciia rang Mo dun phap tuyen Mo dun mat dau Nlia goc con chia Gdc xodn ring He sd dich chinh Goc an khdp danh nghTa diem Chieu rpng bdnh rang Chieu dai tao bdi hinh cdn chia
Dp lech tam
Ky hifu Z
m m 5
P
^
a b L E
Dtra vi
do do mm
do mm mm mm
Ket qua Chu dong
6
Bi dong 41 6,83
Trai 1 Phai 7,000
9,42 ' 11.5"
42°
-0,682 20°
63.3 210.93
78.5°
27,49°
0,682 20°
58 210.93 38 Budc 1: Thief ke he mat bien dgng rdng
Nhgp thdng sd bd truyen Hypoid vdo chuong trinh tinh Excel nhu hmh 2-a, day la chuang trinh dugc lgp trinh bdng Microsoft "Visual Basic (hinh 1), dya tten ca sd Iy thuyet ciia cac cdng trinh [1-5], chuyen dimg cho tinh toan thiet ke be mat rang bd truyen banh rdng hypoit. K i t qua thdng so hinh hpc cua bd truyen nhu hinh 2-b.
Xuat dtr Heu dudi dang file.igs: Tir Excel vao View chpn Macros, hop thoai Macro (hmh 2-c) gdm cd hai dii lieu Datainput.Gear va Data input.Pin!on, Ian Iugt chpn tiing du lieu d l tao file dinh dang.igs cho banh rang vanh chdu va qua diia. Chpn Run va luu file dudi dgng.igs.
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NGHIEN cufu - TRAO DOI
Hinh 1. Lgp trinh thiet ke chuang trinh tinh be mat rdng cua cap bdnh rdng hypoit
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Hinh 2. Tinh todn thong so bd fruyin cgp bdnh rdng Hipoid- a) Thong sd ddu vdo; b) Thong sd hinh hgc ddu ra; c) Cua so Macro
Budc 2: Xdy dtmg md hinh tie File du lieu dinh dgng. igs trin phdn mem Inventor
Tir mdi tiardng Standar (mm), ipt trong phdn mem Inventor, xdy dyng md hinh 3D banh rdng vanh chdu (hoac qud diia) theo kich thudc bao ngodi ca bdn (ldch thudc phdi), nhu hinh 3-a. '^
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NGHIEN cufu-TRAODPI
Hinh 3: Thief ke bdnh rang vdnh chdu: a) Thiit ki kich thudc bao ngodi (kich thu&c phdi) cua bdnh rdng vanh chau; b) Thief ki be mat rdng ciia bdnh rdng vdnh chdu; c) Tgo sd lirang rdng cdn thiet; d) Cat rang Gpi File da Ixm dudi dgng .igs bang cdch vao Manage -> Import tim va gpi file dd luu. Sau khi gpi be mat dugc tao nhu ttong hinh 3-b.
Thyc hien lenh Circular Pattem de tgo sd Iugng be mat rang cdn thiet (hinh 3-c). Thyc hien lenh Split de cat rang (hinh 3-d).
Sau khi thyc hien Spht cho todn bp sd rang ciia bdnh rdng, dugc bdnh rdng vanh chau (Gear) hoan chinh nhu hinh 4-a. Thyc hien cdc budc tucmg ty cho bdnh rdng qud dira (Pinion), ta dugc bdnh rdng qud diia hoan chinh nhu hinh 4-b.
Hinh 4: Bg truyin bdnh rdng hodn chinh:
a) Bdnh rang vdnh chdu; b) Bdnh rdng qud dua; c. d) Ldp ghep bg truyen
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NGHIEN cufu-TRAO D 6 I
3. KET LUAN
Phuang phdp da trinh bay ddc biet cd y nghTa va hieu qua thuc te ddi vdi viec thiet ke banh rdng hypoit, nhdm cung cap sd lieu cho qua trinh tinh toan, md phdng ddng lyc hpc, phdn tich vet tilp Xlic, chuyen true tilp dii lieu 3D cho qua trinh gia cdng banh rang tren cac may CNC. • Ngdy nhdn bai: 14/5/2015
Ngdy phdn bien: 18/6/2015
Tai lieu tham khao:
[1]. Nghien ciru ly thuyet tgo hinh vd xdy dung phuang trinh be mdt rdng bdnh rdng Hypoit; Ngo Xuan Quang; Khoa hpc ky thudt thiiy lpi va mdi trudng, sd 37 (6/2012).
[2]. ANSI/AGMA 2005~D03, Design Manual for Bevel Gears, Copyright American GearManufacturers Association.
[3]. Faydor L. Litvin (1989), Theory of Gearing, NASA RP-1212.
[4]. K. M. rTHCMauHK. rHnoHAHbie nepeflaMH.HsflaTejitcxBO "MamHHOcxpoeHHe" MocKsa 1964. 223c.
[5]. Prof. Veniamin I. Goldfarb, Dr. Stepan V. Lunin. Direct Digital Simulation for Gears Volume 1. E-book.
[6]. Stadtfeld,H.J., 1993, "Handbook ofBevel and Hypoid Gears:Calculation, Manufacturing, and Optimization", Rochester Institute of Technology, Rochester, New York.
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