Amaliy ish tish frezalash stanoklarini sozlash

40–rasm. Chastotalar grafigi


; ; .

A2 jadval bo‘yicha barcha uzatishlar nisbati uchun ahamiyatga ega tishlar summasini tanlaymiz, ΣZ=78.

; z₁ =30; z₁'=48;
; z₂'=2z₂; z₂=26; z₂'=52;
; z₃=22; z₃'=56.


II va III vallar orasida:


; ;

Tishlar summasini tanlaymiz ΣZ =70.

; z₄=43; z₄'=27;
; z₅=31; z₅'=39;
, z₆=20; z₅'=50;
Tekshiramiz. Hisoblanlang tezliklar qutisi bo‘yicha n_min ni aniqlaymiz:


n_min=1000 =157,1 ayl/min.


Echish uchun masalalar

1.V_min=0,5 m/min; V_max =2,0 m/min; d_min=20 mm; d_max =30 mm bo‘lganda shpindelning aylanishlar chastotasini rostlash diapazonini D_n ni aniqlang.

2. Yetaklanuvchi valning berilgan aylanishlar chastotasida yetakchi valning aylanishlar chastotasini va tishli uzatma parametrlarini aniaqlang. Boshlang’ich ma’lumotlar 8 jadvalda keltirilgan.

8-jadval. Boshlang’ich ma’lumotlar

Variantlar		0	1	2	3	4	5	6	7	8	9
Uzatma sxemaisi
Dastlabki ma’lumotlar		n1=100 ayl/min	n1=150 ayl/min	n1=350 ayl/min	n1=100 ayl/min	n1=150 ayl/min	n1=160 ayl/min	n1=200 ayl/min	n1=350 ayl/min	n1=500 ayl/min	n1=150 ayl/min
		z1= 25	z1= 30	z1= 18	z1= 25	z1= 45	z1= 20	z1= 1	z1= 2	z1= 3	z1= 5
		z2= 30	z2= 28	z2= 45	z2= 45	z2= 25	z2= 50	z2= 60	z2= 90	z2= 72	z2= 100

1. 
   Tezlikni rostlash diapazoni qiymatini aniqlang. φ progressiya maxraji qiymatini aniqlang. Dastlabki ma’lumotlar 9-jadvalda keltirilgan.
   

9-jadval. Dastlabki ma’lumotlar

Variantlar	0	1	2	3	4	5	6	7	8	9
nmin, ayl/min	30	35,5	40	11,2	80	40	9	31,5	90	31,5
nmax, ayl/min	56	80	315	125	150	1000	31,5	160	1000	560
z	12	8	10	8	12	8	12	8	8	6

2. 
   Aylanishlar chastotasini rostlash diapazonini va progressiya maxrajini aniqlang. n₁=45; n₂=63; n₃=90; n₄=125; n₅=180; n₆=250; n₇=355; n₈=500.
   
3. 
   Agar optimal kesish tezligi V va ishlov beriladigan yuza diametri d bo‘lsa shpindelining aylanishlar chastotasi qatori n = 63, 71, 80, 90, 100, 112, 125, 140, 160, 180, 200, 224, 250 ayl/min bo‘lgan stanok uchun kesish tezligining nisbiy yo‘qotilishini aniqlang. Dastlabki ma’lumotlar 10-jadvalda keltirilgan.
   

10-jadval. Dastlabki ma’lumotlar

Kattalik	Variantlar
	0	1	2	3	4	5	6	7	8	9
V, m/min	110	70	120	70	115	35	52	70	75	30
d, mm	240	240	200	80	180	100	1120	100	160	80

4. 
   3 valli tezliklar qutisi uchun kinematik sxemani tuzing, struktura setkasini, aylanishlar chastotasi grafigini quring, aylanishlar chastotasi geometrik qatorini hisoblang, uzatishlar nisbatini hisoblang, uzatmalarning tishlari sonini aniqlang. Yetaklovchi valning chastotasi n₁=1000 ayl/min. Dastlabki ma’lumotlar 11-jadvalda keltirilgan.
   

11-jadval. Dastlabki ma’lumotlar

Kattalik	Variantlar
	0	1	2	3	4	5	6	7	8	9
Aylanishlar chastotasining geometrik qatori maxraji	2	1,26	1,41	1,26	1,58	1,26	1,58	1,78	1,41	1,41
Shpindelning aylanishlar chastotasi soni, z	4	4	6	6	6	6	6	4	6	6
Shpindelning minimal aylanishlar chastotasi n, ayl/min	125	160	90	125	100	80	63	100	63	90

4 misolni echilishiga qarang (s. 64).

5. 
   u₁, u₂, u₃ uzatishlar nisbatini ta’minlashi kerak bo‘lgan uch juft tishli shesternyalar tishlari sonini aniqlang. Masalani echishda A2-jadvaldan foydalanish tavsiya etiladi. 12-jadvalda dastlabki ma’lumotlar keltirilgan.
   

12-jadval. Dastlabki ma’lumotlar

Uzatish nisbati	Variantlar
	0	1	2	3	4	5	6	7	8	9
U1	1,0	1,0	1,0	1,0	1,05	1,06	1,06	1,41	1,88	2,11
U2	1,5	1,58	1,41	1,33	1,26	1,33	1,26	2,66	2,24	2,51
U3	1,88	2,37	1,68	1,58	1,58	1,41	1,33	2,99	2,99	2,99

41-rasm. Uch pog’onali tezliklar qutisining kinematik sxemasi

13-jadval. Mustoqil ish uchun topshiriq variantlari

Variant №	Vmin /Vmax, m/min	Dmin /Dmax, mm	φ	P el.dv,	nel.dv, ayl/min	Nel/dv, kVt
01	50/200	20/250	1,26	1	1460	7
02	30/100	20/150	1,26	1	950	4,5
03	60/200	45/250	1,41	1	960	3
04	10/120	120/400	1,26	2	750/1500	6/7
05	20/200	120/550	1,41	2	750/1500	10/11,5
06	50/120	60/150	1,26	2	750/1500	4/5
07	90/200	120/325	1,41	2	750/1500	3,5/4
08	60/150	45/200	1,41	1	960	7
09	80/200	60/180	1,26	1	960	8
10	15/120	60/375	1,26	1	960	10
11	15/375	30/160	1,41	1	1460	9
12	35/225	50/250	1,41	1	1420	7
13	90/150	45/180	1,26	2	750/1500	4/5
14	90/250	100/180	1,26	1	960	4,5
15	70/150	30/180	1,26	2	750/1500	7/7,5
16	50/350	90/400	1,26	2	750/1500	8/9
17	40/300	60/200	1,26	1	1420	7
18	50/250	20/350	1,41	2	1500/3000	4,5/5,5
19	90/250	120/180	1,26	1	960	3,5
20	90/250	100/180	1,26	2	750/1500	4/5
21	15/400	45/400	1,41	1	1420	8
22	20/200	120/200	1,41	1	960	4,5
23	40/250	120/200	1,26	2	750/1500	4,5/5
24	50/275	120/500	1,41	1	960	7
25	35/225	35/250	1,41	1	1420	10
26	80/275	120/275	1,41	2	750/1500	3,5/4
27	80/250	100/250	1,26	2	750/1500	4,5/5
28	40/375	100/200	1,26	1	1420	7
29	50/250	120/200	1,26	1	960	7
30	70/375	120/550	1,26	2	750/1500	7,5/8
31	30/450	35/450	1,41	1	1420	10
32	30/450	20/325	1,41	2	750/1500	7,5/8
33	70/275	110/180	1,41	1	960	3,5
34	70/200	60/180	1,41	1	960	4
35	15/225	50/300	1,41	1	1420	8
36	90/300	90/325	1,41	2	750/1500	4,5/5
37	35/150	45/250	1,41	2	750/1500	7,5/8
38	15/120	60/300	1,26	1	960	10
39	15/375	30/400	1,41	1	1420	10
40	80/375	60/250	1,26	2	1500/3000	7,5/8
41	90/300	60/180	1,26	1	1420	5
42	90/200	120/180	1,26	2	750/1500	3
43	90/120	60/180	1,26	2	750/1500	3
44	15/375	60/300	1,41	1	1420	7
45	40/225	35/385	1,26	3	750/1500	7,8/8
46	50/175	45/400	1,26	1	1420	10
47	50/325	50/350	1,41	2	1420	8
48	45/120	60/225	1,26	1	960	4.5
49	60/150	45/200	1,41	2	750/1500	4
50	30/275	70/275	1,26	2	750/1500	9

8. Ikki tezlikli, Z=9, φ=1,41 yuritmaning struktura setkasini quring.

9. Z=17, φ=1,26, φ=1,41 ga struktura setkasini quring.
10. Ikki tezlikli, Z=9, φ=1,26 yuritmaning struktura setkasini quring.
11. Z=15 ga struktura setkasini quring.
12. 13-jadvalda ma’lumotlar bo‘yicha bosh harakat yuritmasini kinematik hisobini bajaring.


Hisobot mazmuni

1. Ishning maqsadi.

2. Struktura setkasini qurish tartibini ifodalash.
3. O‘qituvchi ko‘rsatgan variant bo‘yicha struktura setkasini qurish.
4. Aylanishlar chastotasi grafigini qurish tartibini ifodalash.
5. O‘qituvchi ko‘rsatgan variant bo‘yicha aylanishlar chastotas grafigini qurish.
6. Jadvaldagi variant bo‘yicha bosh harakat yuritmasi kinematik hisobini bajarish.
7. Nazorat savollariga javob berish.