فهرست علائم
تنش مهندسی
کرنش مهندسی
تنش حقیقی
کرنش حقیقی
F نیرو
سطح مقطع اولیه
طول اولیه
طول ثانویه
قطر بلانک اولیه
قطر سنبه(قطر ظرف کشیده شده از بلانک)
فهرست جداول
عنوان |
صفحه |
فصل سوم) |
|
جدول 3-1 : درصد عناصر آلیاژی و خصوصیات فیزیکی ورق برنج 30/70 ……………………………. |
36 |
فصل چهارم) |
|
جدول4-1: مشخصات قطعات آزمایش شده جهت اثبات شبیه سازی برای ورق برنج30/70……… |
56 |
جدول4-2: بررسی تاثیر نیروهای ورقگیر بر (LDR) در شبیه سازی…………………………………….. |
63 |
جدول4-3: بررسی تاثیر اصطکاک بر (LDR) در شبیه سازی …………………………………………… |
67 |
جدول4-4: بررسی تاثیر ضخامت ورق اولیه بر (LDR) در شبیه سازی ………………………………… |
70 |
جدول4-5: بررسی تاثیر لقی بین سنبه و ماتریس بر (LDR) در شبیه سازی…………………………… |
73 |
پیوست1) |
|
جدول6-1: طول و عرض قطعات پاره و سالم در نمونه های تجربی و شبیه سازی……………………… |
86 |
جدول6-2: طول و عرض قطعات شبیه سازی شده در نیروهای ورقگیر متفاوت ………………………. |
86 |
جدول6-3: طول و عرض قطعات شبیه سازی شده دراصطکاک های متفاوت………………………….. |
86 |
جدول6-4: طول و عرض قطعات شبیه سازی شده در ضخامت های متفاوت ………………………….. |
87 |
جدول6-5: طول و عرض قطعات شبیه سازی شده در لقی های متفاوت …………………………………. |
87 |
فهرست اشکال
عنوان |
صفحه |
|
فصل اول) |
||
شکل 1-1. موتور ماشین و رادیاتور خنک کننده و رادیاتور بخاری…………………………………….. |
3 |
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شکل 1-2.رادیاتور خنک کننده موتور………………………………………………………………………….. |
4 |
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شکل 1-3.رادیاتور بخاری …………………………………………………………………………………………. |
5 |
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شکل 1-4. مخزن آب بخاری بنز مایلر…………………………………………………………………………… |
5 |
|
شکل 1-5. شماتیکی از الف)کشش عمیق هیدرودینامیکی ب)کشش عمیق هیدروفرمینگ………. |
7 |
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شکل 1-6. شماتیکی از فرآیند شکل دهی کشش عمیق متداول………………………………………….. |
8 |
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شکل 1-7. فرآیند شکل دهی کشش عمیق،( قطر اولیه و قطر سنبه )………………………. |
8 |
|
فصل دوم) |
||
شکل 2-1. منحنی حد نسبت کشش و فشار……………………………………………………………………. |
12 |
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شکل 2-2. منحنی حد نسبت کشش و ضخامت برای سه جنس فولاد،مس و آلومینیم…………….. |
12 |
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شکل 2-3. اثر ضخامت ورق برحد نسبت کشش…………………………………………………………….. |
13 |
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شکل 2-4. اثر نیروی ورقگیر برحد نسبت کشش…………………………………………………………….. |
14 |
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شکل 2-5. نمودار اثر نیروی ضریب C برحد نسبت کشش ………………………………………………. |
15 |
|
شکل 2-6. اثر شعاع انحنای ماتریس برحد نسبت کشش (LDR) در دو آلیاژ آلومینیم…………… |
17 |
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شکل 2-7. اثر شعاع انحنای ماتریس برحد نسبت کشش (LDR)……………………………………….. |
19 |
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شکل 2-8. اثر نسبت شعاع انحنای ماتریس بر ضخامت ورق( ) بر روی حد نسبت کشش………………………………………………………………………………………………………………………… |
20 |
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شکل 2-9. اثر ضریب اصطکاک برحد نسبت کشش………………………………………………………… |
21 |
|
شکل 2-10. اثر ضریب اصطکاک برحد نسبت کشش برای مقادیر بالای حساسیت نرخ کرنش(m)………………………………………………………………………………………………………………….. |
22 |
|
شکل 2-11.نمودار وابستگی ضریب اصطکاک برحد نسبت کشش در نیروی ورقگیر گوناگون.. |
22 |
|
شکل 2-12.تاثیر ضریب اصطکاک برحد نسبت کشش در فشارهای مختلف بین ورق و ورقگیر.. |
23 |
|
شکل 2-13.تاثیر ضریب اصطکاک برحد نسبت کشش در فشارهای مختلف بین ورق و ماتریس… |
23 |
|
شکل 2-14.تاثیر ضریب اصطکاک برحد نسبت کشش در فشارهای مختلف بین ورق و سنبه…….. |
24 |
|
شکل 2-15.تاثیر ضریب اصطکاک بین ورق با ماتریس و ورقگیر برحد نسبت کشش……………… |
25 |
|
شکل 2-16.تاثیر ضریب اصطکاک برحد نسبت کشش در ناهمسانگردی های مختلف……………. |
26 |
|
شکل 2-17.نمودار دمای شکل دهی – حد نسبت کشش…………………………………………………… |
27 |
|
شکل 2-18.نمودار ناهمسانگردی های نرمال – حد نسبت کشش در اصطکاک های مختلف……… |
28 |
|
شکل 2-19. نمودار ناهمسانگردی های نرمال – حد نسبت کشش……………………………………….. |
29 |
|
شکل 2-20. نمودار شعاع قوس قالب-حد نسبت کشش در ناهمسانگردی های نرمال مختلف…….. |
29 |
|
شکل 2-21. نمودار ناهمسانگردی نرمال – حد نسبت کشش در اصطکاک های2/0و05/0……….. |
30 |
|
شکل 2-22. قطعات بشکه ای،سهموی و مخروطی تولید شده به روش ویسکوپلاستیک………….. |
31 |
|
شکل 2-23. شماتیکی از قالب کشش عمیق در فرآیند جدید طراحی…………………………………. |
32 |
|
شکل 2-24. قطعات الف)تجربی و ب)شبیه سازی با حد نسبت کشش 9……………………………… |
33 |
|
فصل سوم) |
||
شکل 3-1. ورق بریده شده به شکل دمبل برای آزمون کشش……………………………………………. |
37 |
|
شکل 3-2. نمودار نیرو جابجایی، در نتیجه آزمون کشش………………………………………………….. |
37 |
|
شکل 3-3. ورق دمبل شکل بسته شده به دستگاه آزمون کشش………………………………………….. |
38 |
|
شکل 3-4. نمودار تنش-کرنش مهندسی و حقیقی، در نتیجه آزمون کشش………………………….. |
39 |
|
شکل 3-5. پرس هیدرولیک 100 تن …………………………………………………………………………… |
40 |
|
شکل 3-6. قالب(سنبه، ماتریس و ورقگیر) مورد نظر جهت آزمایش تجربی…………………………. |
40 |
|
شکل 3-7. قطعات رسم شده در ماژول Part ………………………………………………………………… |
41 |
|
شکل 3-8. خواص وارد شده در ماژول Property ……………………………………………………….. |
42 |
|
شکل 3-9. فاصله ورق اولیه با ماتریس،سنبه و ورقگیر در ماژول Property ……………………….. |
43 |
|
شکل 3-10. تعریف نوع تحلیل در ماژول Step …………………………………………………………….. |
43 |
|
شکل 3-11. تعریف set در ماژول Step……………………………………………………………………… |
44 |
|
شکل 3-12. تعریف نمودارهای خروجی در ماژول Step………………………………………………… |
44 |
|
شکل 3-13. تعریف خروجی های گرافیکی در ماژول Step …………………………………………… |
45 |
|
شکل 3-14. تعریف نوع Contactها در ماژول Interaction ……………………………………….. |
45 |
|
شکل 3-15. تعریف نوع Interaction در ماژول Interaction …………………………………….. |
46 |
|
شکل 3-16. تعریف نوع Load در ماژول Load…………………………………………………………… |
47 |
|
شکل 3-17. تعریف Boundary Condition برای ماتریس در ماژول Load………………….. |
47 |
|
شکل 3-18. تعریف Boundary Condition برای ورقگیر و سنبه در ماژول Load…………. |
48 |
|
شکل 3-19. تعریف شکل مشبندی قطعات توسط Assign Mesh Control در ماژول مش… |
48 |
|
شکل 3-20. تعریف Partition برای برش قطعه در ماژول Mesh…………………………………… |
49 |
|
شکل 3-21. تعریف تعداد المانهای هر ضلع توسط Seed Edges در ماژول Mesh…………… |
49 |
|
شکل 3-22. نمودار حساسیت مش بندی و همگرایی در ماژول Mesh………………………………. |
50 |
|
شکل 3-23. تعیین نوع المانهای هر قطعه توسط Element Type در ماژول Mesh…………… |
50 |
|
شکل 3-24. چک کردن بدون ایراد بودن مشبندی هر قطعه توسط Verify Mesh در ماژول Mesh………………………………………………………………………………………………………………………. |
51 |
|
شکل 3-25. مراحل ایجاد و حل Job در ماژول Job………………………………………………………. |
51 |
|
شکل 3-26. نتایج یک تحلیل در ماژول Visualization………………………………………………. |
52 |
|
فصل چهارم) |
||
شکل 4-1. قطعه تولید شده با ضخامتmm6/0و فشارورقگیرbar50…………………………………. |
57 |
|
شکل 4-2. توزیع ضخامت قطعه شبیه سازی شده با فشار ورقگیر bar50……………………………. |
57 |
|
شکل 4-3. قطعه تجربی برش خورده با فشار ورقگیر bar 05 ………………………………………….. |
58 |
|
شکل 4-4. قطعه شبیه سازی برش خورده با فشار ورقگیر bar50…………………………………….. |
58 |
|
شکل 4-5. نمودار مقایسه ضخامت نمونه تجربی و شبیه سازی در نقاط تعیین شده برای ورق با ضخامتmm6/0و فشار ورقگیر bar 50………………………………………………………………………… |
59 |
|
شکل 4-6. قطعه تولید شده باضخامتmm6/0و فشار ورقگیرbar40…………………………………. |
60 |
|
شکل 4-7. توزیع ضخامت قطعه شبیه سازی شده با فشار ورقگیر bar 40 …………………………… |
61 |
|
شکل 4-8. قطعه تجربی برش خورده عرضی با فشار ورقگیر bar 40 …………………………………. |
61 |
|
شکل 4-9. قطعه شبیه سازی برش خورده عرضی با فشار ورقگیر bar 40 ……………………………. |
62 |
|
شکل 4-10. نمودار مقایسه ضخامت نمونه تجربی و شبیه سازی در نقاط تعیین شده برای ورق با ضخامتmm6/0و فشار ورقگیر bar 40………………………………………………………………………… |
62 |
|
شکل 4-11. توزیع ضخامت قطعه شبیه سازی شده با ضخامت6/0، اصطکاک 31/0، لقی 9/0 در بار های مختلف ………………………………………………………………………………………………………….. |
65 |
|
شکل 4-12. نمودار تاثیر فشار ورقگیر بر (LDR) …………………………………………………………… |
66 |
|
شکل 4-13. توزیع ضخامت قطعه شبیه سازی شده با ضخامت6/0،فشار ورقگیرbar40، لقی 9/0 در اصطکاک های مختلف ……………………………………………………………………………………………. |
69 |
|
شکل 4-14. نمودار تاثیر اصطکاک بر (LDR)………………………………………………………………. |
69 |
|
شکل 4-15. توزیع ضخامت قطعه شبیه سازی شده با فشار ورقگیرbar40، لقی 9/0، اصطکاک 3/0 در ضخامت های مختلف…………………………………………………………………………………………. |
72 |
|
شکل 4-16. نمودار تاثیر ضخامت بر (LDR) ………………………………………………………………… |
72 |
|
شکل 4-17. توزیع ضخامت قطعه شبیه سازی شده با ضخامتmm6/0،فشار ورقگیرbar40، اصطکاک 3/0 در لقی های مختلف ………………………………………………………………………………… |
75 |
|
شکل 4-18. نمودار تاثیر لقی بین سنبه و ماتریس بر (LDR) ……………………………………………. |
75 |
|
فهرست مطالب
عنوان |
صفحه |
اعلان منحصر به فرد بودن پایان نامه …………………………………………………………………………………. |
ت |
قدردانی………………………………………………………………………………………………………………………. |
ث |
اهدا نامه………………………………………………………………………………………………………………………. |
ج |
فهرست علائم………………………………………………………………………………………………………………. |
ح |
فهرست جداول ……………………………………………………………………………………………………………. |
خ |
فهرست اشکال……………………………………………………………………………………………………………… |
د |
چکیده فارسی………………………………………………………………………………………………………………. |
1 |
فصل اول: مقدمه…………………………………………………………………………………….. |
2 |
1-1-شرح نیاز صنعت ………………………………………………………………………………………………. |
3 |
1-2-مقدمه……………………………………………………………………………………………………………… |
6 |
1-3-انواع فرآیندهای کشش عمیق………………………………………………………………………………. |
7 |
1-3-1-کشش عمیق با فشار هیدرو استاتیک………………………………………………………………….. |
7 |
1-3-2-کشش عمیق متداول……………………………………………………………………………………….. |
8 |
1-4- حد نسبت کشش (LDR: Limiting Draw Ratio)………………………………………….. |
8 |
1-5- اهمیت (LDR)………………………………………………………………………………………………. |
9 |
1-6-برخی از عوامل کاربردی که بر حد نسبت کشش (LDR) تاثیر می گذارند…………………… |
9 |
فصل دوم: مروری بر منابع………………………………………………………………………… |
10 |
2-1-بررسی های انجام گرفته در زمینه جنس و ضخامت ورق اولیه……………………………………… |
11 |
2-2-بررسی های انجام گرفته در زمینه ورقگیر………………………………………………………………… |
13 |
2-3-بررسی های انجام گرفته در زمینه اثر پروفیل سنبه……………………………………………………… |
16 |
2-4-بررسی های انجام گرفته در زمینه اثر شعاع ماتریس…………………………………………………… |
17 |
2-5- بررسی های انجام گرفته در زمینه لقی……………………………………………………………………. |
20 |
2-6- بررسی های انجام گرفته در زمینه اصطکاک…………………………………………………………… |
20 |
2-7- بررسی های انجام گرفته در زمینه دمای ناحیه کاری………………………………………………….. |
26 |
2-8- بررسی های انجام گرفته در زمینه ناهمسانگردی………………………………………………………. |
28 |
2-9- مطالعات انجام شده در زمینه های دیگر………………………………………………………………….. |
30 |
2-10- ضرورت انجام تحقیق………………………………………………………………………………………. |
34 |
فصل سوم: شرح آزمایش………………………………………………………………………….. |
35 |
3-1-خصوصیات برنج 30/70………………………………………………………………………………………. |
36 |
3-2- آزمون کشش……………………………………………………………………………………………………. |
36 |
3-3- دستگاه پرس……………………………………………………………………………………………………. |
40 |
3-4- قالب………………………………………………………………………………………………………………. |
40 |
3-5- شبیه سازی………………………………………………………………………………………………………. |
41 |
3-5-1- ماژول Part …………………………………………………………………………………………… |
41 |
3-5-2- ماژول Property ……………………………………………………………………………………. |
42 |
3-5-3- ماژول Assembly ………………………………………………………………………………… |
42 |
3-5-4- ماژول Step ………………………………………………………………………………………….. |
43 |
3-5-5- ماژول Interaction ………………………………………………………………………………. |
45 |
3-5-6- ماژول Load …………………………………………………………………………………………. |
46 |
3-5-7- ماژول Mesh ………………………………………………………………………………………… |
48 |
3-5-8- ماژول Job ……………………………………………………………………………………………. |
50 |
3-5-9- ماژول Visualization ………………………………………………………………………….. |
51 |
3-6- آزمایش های انجام شده جهت اثبات اعتبار شبیه سازی………………………………………………. |
53 |
3-7- بررسی های انجام شده در شبیه سازی جهت بررسی عوامل موثر بر (LDR)…………………. |
53 |
3-7-1- بررسی تاثیر نیروی ورقگیر بر (LDR)………………………………………………………….. |
53 |
3-7-2- بررسی تاثیر اصطکاک بین ورق و سطح داخلی ماتریس بر (LDR)……………………… |
53 |
3-7-3- بررسی تاثیر ضخامت ورق بر (LDR)……………………………………………………………. |
54 |
3-7-4- بررسی تاثیر لقی بین سنبه و ماتریس بر (LDR)………………………………………………… |
54 |
فصل چهارم: نتایج…………………………………………………………………………………… |
55 |
4-1- نتایج آزمایش های انجام شده جهت اثبات اعتبار شبیه سازی……………………………………….. |
56 |
4-1-1- قطعه معیوب……………………………………………………………………………………………… |
56 |
4-1-2- قطعه سالم………………………………………………………………………………………………….. |
60 |
4-2- بررسی های انجام شده در شبیه سازی جهت بررسی عوامل موثر بر(LDR)…………………… |
63 |
4-2-1- بررسی تاثیر نیروی ورقگیر بر (LDR)…………………………………………………………… |
63 |
4-2-2- بررسی تاثیر اصطکاک بین ورق و ماتریس بر (LDR)……………………………………… |
66 |
4-2-3- بررسی تاثیر ضخامت ورق بر(LDR) ……………………………………………………………. |
70 |
4-2-4- بررسی تاثیر لقی بین سنبه و ماتریس بر(LDR) ………………………………………………… |
73 |
فصل پنجم: نتیجه گیری و پیشنهادات………………………………………………………….. |
77 |
5-1- نتیجه گیری………………………………………………………………………………………………………. |
78 |
5-2- پیشنهادات………………………………………………………………………………………………………… |
78 |
5-3- منابع و مراجع……………………………………………………………………………………………………. |
79 |
پیوست1……………………………………………………………………………………………………………………… |
85 |
چکیده انگلیسی……………………………………………………………………………………………………………. |
88 |
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