BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

More documents

Recommendations

Info

50 Silviu Berbinschi et al solution for the profiling of rack-gear tool reciprocally enveloping with an ordered curl profiles associated with a couple of rolling centrodes, using the capabilities of CATIA software, by making an kinematics entity which will simulate the rolling movement of the two centrodes [8]. 2. Application for Rack-Gear Profiling In order to obtain the tool’s profile for various polygonal shafts, for various side lengths, is need to follow two stages. The first stage is to choose the side length and the diameter of the rolling circle as input data. This thing may be done introducing in an text or Excel file the value, in following, the CATIA software will automate modify the whole mechanism, with the new values. In the same stage is created the mechanism, the rolling of this and the tool’s profile determination. The coordinates of points belongs to profile will be exported in a text or Excel file. The second stage consist in the partial remake of the mechanism couples, the rolling of this for the new tool’s profile, for the previous modified values and the export of points in a new file. 2.1. First stage 2.1.1. Data input and mechanism elements construction. In this step are created a folder with all files needed for the mechanism. First of all for the input data is created a text of excel file with the names and the values of the input parameters, namely the piece shaft radius Ra, the polygonal side length L and the rolling circle radius of blank Rrp. These are the parameters which may be modified by user. This file will be linked with the parameters from the CATIA file. In the following example is considered a hexagonal shaft with L=50 mm and the including radius Ra=50 mm. In order to simplify the representation we consider the rolling radius Rrp=50 mm. The shaft sketch and the associated centrode are represented in figure 1. The mechanism elements are successive created, in the Part environment, are suggestive named and inserted in an assembly file, created in the Assembly environment, named GenCremaliera. The Part type files are: baza; piesa; cremaliera and tachet. The Baza file contains the standing part of the mechanism and represent more lines needed to mount others elements, see figure 2. From a point named OriginePiesa is construct a line named AxaArbore, representing the piece’s axis and next another line which will be as guide for the rolling line named GhidajDreaptaRulare. The segment having the rolling radius length and which contain the gearing pole is created in order to ease the
Bul. Inst. Polit. Iaşi, t. LVI (LX), f. 2, 2010 51 mechanism assembling. The point PolulAngrenarii is situated on the rolling circle with radius Rrp. Fig. 1 – The shaft sketch. This file contain a parameters table (Design Table) named DateIntrare which link the line and point’s parameters from the Part file (from CATIA) with the input data from the file DateIntrare.txt. The file Piesa contain, firstly, the geometrical elements of the profile for which is determined the tool’s profile, see figure 2. Another sketch from this file is CercRulare which contain a circle with radius Rrp. The two values Ra and Rrp are linked with the text file DateIntrare.txt. The file Cremaliera contain the rolling straight line (DreaptaRulare) representing a circular pitch of the curl to be generated and having the length as function of the rolling radius Rrp, controlled by file DateIntrare.txt. The file Tachet have the straight lines which are tangent and respectively normal at the piece’s profile in the contact points. Fig. 2 – Assembly file with kinematics couples and tool’s profile.
Page 1:
BULETINUL INSTITUTULUI POLITEHNIC D
Page 5:
Papers presented at THE INTERNATION
Page 8 and 9:
SILVIU BERBINSCHI, VIRGIL TEODOR, N
Page 10 and 11:
Page 12 and 13:
CONSTANTIN CHIRIȚĂ, ADRIAN HANGAN
Page 15 and 16: BULETINUL INSTITUTULUI POLITEHNIC D
Page 17 and 18: Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 19 and 20: (6) ⎧ ⎪ ⎨ ⎪ ⎩⎪ FR 1 FR
Page 21: Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 24 and 25: 10 Taxiarchis Belis and Aristomenis
Page 36 and 37: 22 Nikolaos Tapoglou and Aristomeni
Page 46 and 47: 32 Eugen Străjescu et al. The mode
Page 48 and 49: 34 Eugen Străjescu et al. On the o
Page 50 and 51: 36 Eugen Străjescu et al. 3.5 3 2.
Page 52 and 53: 38 Eugen Străjescu et al. 2.5 2 1.
Page 63: BULETINUL INSTITUTULUI POLITEHNIC D
Page 69 and 70: (5) Bul. Inst. P olit. Iaşi, t. LV
Page 73 and 74: p (4) g( ) (5) p g( ) Bul. Inst. Po
Page 81 and 82: (5) Bul. Inst . Polit. Iaşi, t. LV
Page 87: Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 90 and 91: 76 Ana-Maria Matei and Marius-Nicol
Page 98 and 99: 84 Marius Ionuţ Rîpanu et al. The
Page 100 and 101: 86 Marius Ionuţ Rîpanu et al. Fig
Page 102 and 103: 88 Marius Ionuţ Rîpanu et al. The
Page 104 and 105: 90 Marius Ionuţ Rîpanu et al. R E
Page 106 and 107: 92 Iustina Elena Rotman et al be co
Page 108 and 109: 94 Iustina Elena Rotman et al This
Page 110 and 111: 96 Iustina Elena Rotman et al 5. *
Page 112 and 113: 98 Cătălin Ungureanu et al. Devia
Page 114 and 115:
100 Cătălin Ungureanu et al. VI g
Page 116 and 117:
102 Cătălin Ungureanu et al. d [m
Page 118 and 119:
104 Cătălin Ungureanu et al. SIST
Page 120 and 121:
106 Birgit Kjærside Storm parts wi
Page 122 and 123:
108 Birgit Kjærside Storm They are
Page 124 and 125:
110 Birgit Kjærside Storm A fresh
Page 126 and 127:
112 Birgit Kjærside Storm rate of
Page 128 and 129:
114 Birgit Kjærside Storm The HSP
Page 130 and 131:
116 Birgit Kjærside Storm 4. P i z
Page 132 and 133:
118 Ioana Petre et al. The utilizat
Page 134 and 135:
120 Ioana Petre et al. by a pneumat
Page 136 and 137:
122 Ioana Petre et al. Another appl
Page 138 and 139:
124 Ioana Petre et al. APLICAŢII I
Page 140 and 141:
126 Mihăiță Horodincă absorbed
Page 142 and 143:
128 Mihăiță Horodincă 3. Some E
Page 144 and 145:
130 Mihăiță Horodincă For certa
Page 146 and 147:
132 Mihăiță Horodincă behaviour
Page 149 and 150:
Page 151 and 152:
As the planetary processional trans
Page 153 and 154:
Bul. Inst. Polit. Iaşi, t. LVI (LX
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
(4) Bul. Inst. Polit. Iaşi, t. LVI
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
then, under the principle of optima
Page 223 and 224:
Page 225 and 226:
c) Calculate values (14) ⎧V ⎪
Page 227:
Page 230 and 231:
216 Dănuț Zahariea and Mihaela Tu
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
222 Dănuț Zahariea and Marius Sta
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
228 Irène Alexandrescu et al. Glob
Page 244 and 245:
230 Irène Alexandrescu et al. 3. S
Page 246 and 247:
232 Irène Alexandrescu et al. The
Page 248 and 249:
234 Irène Alexandrescu et al. depa
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Conventional approach Client specif
Page 263 and 264:
Page 265 and 266:
Page 267 and 268:
Page 269 and 270:
Page 271 and 272:
Page 273 and 274:
Page 275 and 276:
Page 277 and 278:
Rate of recycling, [%] Bul. Inst. P
Page 279 and 280:
Page 281 and 282:
Page 283 and 284:
Page 285 and 286:
Page 287 and 288:
Fig. 15 - Air velocity distribution
Page 289:
Page 292:
Stachie Marius 221 Storm Kjærside
show all

BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI - Universitatea ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?