Ðåôåðàò: Ïðîåêòèðîâàíèå âåðòèêàëüíî ôðåçåðíîãî ñòàíêà
Òàêèì îáðàçîì ïîëó÷àåì, íà âñåõ ñòóïåíÿõ îòíîñèòåëüíóþ ïîãðåøíîñòü íå ïðåâûøàþùóþ
ïðåäåëüíî äîïóñòèìóþ (2.6%)
Êèíåìàòè÷åñêèé ðàñ÷åò ïðèâîäà ïîäà÷ ñî ñòóïåí÷àòûì
ðåãóëèðîâàíèåì.
Ðàñ÷åò ïðèâîäà ïîäà÷ âåäåì àíàëîãè÷íî ðàñ÷åòó ïðèâîäà ãëàâíîãî äâèæåíèÿ.
1. Äèàïàçîí ðåãóëèðîâàíèÿ ÷àñòîò âðàùåíèÿ
Rn = Smax / Smin = 1600 / 50 = 32
2. Çíàìåíàòåëü ãåîìåòðè÷åñêîãî ðÿäà ÷àñòîò âðàùåíèÿ øïèíäåëÿ:
tgj = lg Rn / zs - 1 = lg 32 / 15 = 0.1
Èç ïðèëîæåíèÿ 1 âûáèðàåì áëèæàéøåå ñòàíäàðòíîå çíà÷åíèå äëÿ j
j = 1.26
3. Îïðåäåëÿåì ðÿä ïîäà÷ (ìì/ìèí)
| 1600 | 1269.84 | 1007.81 | 799.84 | 634.80 | 503.81 | 399.84 | 317.33 |
| 251.85 | 199.88 | 158.63 | 125.9 | 99.9 | 79.3 | 62.94 | 50 |
4. Ïðåîáðàçîâàíèå âðàùàòåëüíîãî äâèæåíèÿ âûõîäíîãî âàëà êîðîáêè ïîäà÷ â ïîñòóïàòåëüíîå
äâèæåíèå ñòîëà ïðîèñõîäèò ñ ïîìîùüþ
5. Äëÿ îïðåäåëåíèÿ ÷àñòîò âðàùåíèÿ âûõîäíîãî âàëà êîðîáêè ïîäà÷ nn (ìì/îá) íåîáõîäèìî
êàæäîå çíà÷åíèå ðÿäà ïîäà÷ ðàçäåëèòü íà ïåðåäàòî÷íîå ÷èñëî.
Ðåçóëüòàòû ñâîäèì â òàáëèöó.
| 266.67 | 211.64 | 167.97 | 133.31 | 105.8 | 83.97 | 66.64 | 52.89 |
| 41.96 | 33.31 | 26.44 | 20.98 | 16.65 | 13.22 | 10.49 | 8.33 |
6. Âûáèðàåì îïòèìàëüíóþ ñòðóêòóðíóþ ôîðìóëó:
16 = 4(1) x 2(4) x 2(8)
7. Íà îñíîâå îïòèìàëüíîãî âàðèàíòà ñòðîèì ñòðóêòóðíóþ ñåòêó è ãðàôèê ÷àñòîò âðàùåíèÿ
âûõîäíîãî âàëà.
1600
1269
1007 (266)
799 (211)
634 (167)
503 (133)
399 (105)
317 (83)
251 (66)
199 (52)
158 (41)
125 (33)
99 (26)
79 (20)
62 (16)
50 (133)
(10)
(8)
8. Îïðåäåëèì êîëè÷åñòâî çóáüåâ è ïåðåäàòî÷íîå îòíîøåíèå.
Ïåðâàÿ ãðóïïà ïåðåäà÷ åz = 93
z1âù = 93 / 1+1.26 = 41 z1âä = 93 - 41 = 52 i1` = 41 / 52 = 0.788
z2âù = 93 / 1+1.262 = 36 z2âä = 93 - 36 = 57 i2` = 36 / 57 = 0.63
z3âù = 93 / 1+1.263 = 31 z3âä = 93 - 31 = 62 i3` = 31 /62 = 0.5
Âòîðàÿ ãðóïïà ïåðåäà÷ åz = 120
z4âù = 120 / 1+1/1.26 = 67 z4âä = 120 - 67 = 53 i4` = 67 / 53 = 1.264
z5âù = 120 / 1+1.262 = 46 z5âä = 120 - 46 = 74 i5` = 46 / 74 = 0.721
z6âù = 120 / 1+1.265 = 29 z6âä = 120 - 29 = 91 i6` = 29 / 91 = 0.318
Òðåòüÿ ãðóïïà ïåðåäà÷ åz = 150
z7âù = 150 / 1+1.1.263 = 100 z6âä = 150 - 100 = 50 i6` = 100 / 50 = 2
z8âù = 150 / 1+1.266 = 30 z6âä = 150 - 30 = 120 i6` = 30 / 120 = 0.25
9. Îïðåäåëèì ôàêòè÷åñêèå çíà÷åíèÿ ÷àñòîò âðàùåíèÿ âûõîäíîãî âàëà è îòíîñèòåëüíûå
ïîãðåøíîñòè. ïîëó÷åííûå ïðè ðàñ÷åòå âåëè÷èíû çàíîñèì â òàáëèöó.
|
Ïô1 |
999.954 * i1` * i4` * i7` |
1991.97 | 0.4 % |
|
Ïô2 |
999.954 * i2` * i4` * i7` |
1592.26 | 0.5 % |
|
Ïô3 |
999.954 * i3` * i4` * i7` |
1263.94 | 1.1 % |
|
Ïô4 |
999.954 * i1` * i5` * i7` |
978.65 | 2.1 % |
|
Ïô5 |
999.954 * i2` * i5` * i7` |
782.424 | 2.2 % |
|
Ïô6 |
999.954 * i3` * i5` * i7` |
620.97 | 1.4 % |
|
Ïô7 |
999.954 * i1` * i6` * i7` |
501.1 | 0.2 % |
|
Ïô8 |
999.954 * i2` * i6` * i7` |
400.66 | 0.3 % |
|
Ïô9 |
999.954 * i3` * i6` * i7` |
317.98 | 0.9 % |
|
Ïô10 |
999.954 * i1` * i4` * i8` |
248.9 | 0.2 % |
|
Ïô11 |
999.954 * i2` * i4` * i8` |
199.07 | 0.2 % |
|
Ïô12 |
999.954 * i3` * i4` * i8` |
157.99 | 0.3 % |
|
Ïô13 |
999.954 * i1` * i5` * i8` |
122.33 | 2.1 % |
|
Ïô14 |
999.954 * i2` * i5` * i8` |
97.8 | 2.2 % |
|
Ïô15 |
999.954 * i3` * i5` * i8` |
78.6 | 2.4 % |
|
Ïô16 |
999.954 * i1` * i6` * i8` |
62.6 | 0.5 % |
|
Ïô17 |
999.954 * i2` * i6` * i8` |
50.08 | 0.1 % |
|
Ïô18 |
999.954 * i3` * i6` * i8` |
39.8 | 0.4 % |
