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دراسة انسيابية المعدن خلال عملية درفلة الحلقات باستخدام اللدونة المرئية

Author name: منهل محمد الياس العساف
Supervisor name: جمال حسين محمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

تطبيق طريقة مارسان في البحث عن منتج جديد حالة تطبيقية في شركة الصناعات الخفيفة والمنشاة العامة للزيوت النباتية

Author name: معتز هزاع فيزي الهزاع
Supervisor name: مازن بكر عادل
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

الثقوب العميقة انتاجها على مكائن الخراطة المركزية وسبل تلافي معوقاتها

Author name: معن عابد توفيق
Supervisor name: عبد علي صاحب | اسماعيل المندلاوي
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

استخدام تيار سائل القطع كمعين لكاسرات الرايش

Author name: وليد خالد جواد
Supervisor name: اسماعيل حسن مهدي المندلاوي
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

انتاجية العمل في ادارة المخازن ووسائل تطويرها

Author name: جابر حسوني خليل
Supervisor name: خالد حسين احمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
University: University of Technology
Language: Arabic
University location: Baghdad

Design and Implementation of a Manipulator With End - Effector

Author name: تحسين فاضل عباس العاني
Supervisor name: طارق الخطيب
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology - Department of Production and Metallurgy Engineering
Language: English
University location: Baghdad

دراسة عملية لطريقة التشكيل التزايدية ثنائية التماس لصفائح AL - 1050 باستخدام مكائن التفريز المبرمجة CNC == Experimental Investigation of Two Point Incremental AL (1050) Sheet Metal Forming Process Using CNC Milling Machine

Author name: حارث يعرب معن
Supervisor name: وسام كاظم حمدان
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

تخطيط مسار نقطي خال من الاصطدام لروبوت ممفصل ذا خمس درجات حرية == Point - To - Point Free Collision Path Planning of 5 DOF Articulated Robot

Author name: محمد عبد الرحمن غفور
Supervisor name: تحسين فاضل عباس
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: ان الهدف الرئيسي من هذا البحث هو ايجاد مسار لمفاصل الروبوت وللماسك النهائي في الروبوت خلال حركة الماسك من نقطة البداية الى نقطة الهدف المراد الوصول اليها خلال حيز مؤتمت بدون الاصطدام مع العوائق الموجودة في بيئة الروبوت اعتمادا على الحل العلوي لاذرع الروب | The main objective of this research is to find a path for the robot joints and gripper from the given start point to the desired goal point without collision with the obstacles which exist in the robot environment depending on the robot links upper solution. This research will investigate the problem of path planning for a 5 axis articulated robot, operating in an environment with obstacles whose boundaries are enveloped by a spherical shape. The path planning approach has been developed in the robot joint space and consists of five phases : The first phase is using Bezier, Hermit, B - spline and NURBS curve techniques considering their control points weight not constant. The second phase is to generate a sufficient number of intermediate points in Cartesian space along those curves. The third phase converts the coordinate of the generated intermediate points from its Cartesian space into joint space and move the robot gripper along the generated path. The fourth phase screens the generated four Bezier, Hermite, B - Spline and NURBS paths in order to choose the best one. The fifth phase is developing the chosen path by using proposed algorithm to improve the selected path.Both forward and inverse kinematics solutions for the robot links using Denavite - Hartenberg representation are important step to determine the manipulator's joint angles and Cartesian coordinates, that assists generating the required path which has been derived in this work.Matlab program has been used as an assistant program to analyze, sketch and implement the algorithms of forward kinematics, inverse kinematics and path planning.This work will not be limited to theoretical studies or simulations, experiments have been run with various tests, on "educational robot" Lab - Volt R5150 to assess which path is the better ability in avoiding the obstacles. The method applies to robots in a fixed and known environment. A number of experiments have been carried out to test the ability of the robot arm to reach its goal without collision It’s found that Bezier curve was the chosen path because it was the better obstacle avoidance and shorter path.

السحب العميق المتعدد المراحل للاقداح السداسية == Multistage Deep Drawing of Hexagonal Cups

Author name: صبيح سلمان داود
Supervisor name: وليد خالد جواد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: The aim of this work is to design and manufacturing a multistage (three stages) deep drawing dies to produce cylindrical and hexagonal cups of (43,33.1,26.8)mm diagonal diameter through two methods. The first method by drawing the hexagonal cups directly by using hexagonal orifice die from a flat sheet (blank) of (80mm) diameter and (0.7) mm sheet thickness for (1006 - AISI) hot rolling low carbon steel material.The second method by redrawing a cylindrical cups of (43,33.1,26.8) mm outer diameter (produced previously by a cylindrical orifice die) in to hexagonal orifice die which transform (convert) these cylindrical cups into hexagonal cups of (43,33.1,26.8)mm diagonal diameter.For all stages of drawing hexagonal cups, wall corner radius of die (0.7, 4)mm, with punch and die profile radius of (4 and 8) mm and drawing speed of (50, 200, 500) mm/min were used to study the effect of these parameter on drawing forces, cup wall thickness, strain distribution over the cup wall and surface defect of the cup wall.A commercially finite element soft ware (ANSYS 11.0)was used to perform the numerical simulation for cylindrical and hexagonal cups in three stages of drawing process. A comparison between theoretical (simulation) and experimental results lie within average of (15 - 20%), and the agreement is good in the first stage.The results shown that excessive metal flow ,maximum thinning of cup wall and maximum strain occurred at corner radius of (0.7) mm and at drawing speed of (500mm/min )for hexagonal cup produced directly from flat sheet.The results shown that the best thickness distribution and strain distribution over the cup wall, better cup wall surface (less surface defects) and lowest drawing force was with percentage (63.8%,45.4%,74.1%) respectively occurred when transform (converting) the cylindrical cup into hexagonal cup with wall corner radius of die (Rc= 4)mm in three stages.

دراسة زاوية تعشق العدة في عمليات التفريز == Studying Tool Engagement Angle In Milling Process

Author name: ليث فاضل شاكر
Supervisor name: ليث عبد الله محمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: هذه الاطروحة تعنى بدراسة تاثير زاوية تعشيق العدة بالمشغولة على ستراتيجيات ونتائج عمليات التفريز بالعدد ذات النهايات المسطحة. تم تصميم نموذجين (CAD model) باستخدام برنامج (Solid work 2013) الاول على شكل كونتور خارجي والاخر على شكل بوكيت داخلي وبعد ذلك تم | This work focuses on the effect of controlling tool engagement angle (TEA) on the milling process planning and the results of end milling operations. Two CAD models has been designed by using Solid Work 2013 software, then G - code have been generated and simulated by using Surfcam V5 software with (Fanuc post processing). AL7075 - T6 alloy has been used for its high machinability, dry machining (no coolant) has been done on 3 - axes milling machine (C - tek) available in the University of Technology Training and Workshop Center.Feeds, speeds and other machining parameters (axial and redial depth of cut) have been selected according to machining handbooks recommendations. Machining of workpieces has been accomplished by using two techniques (two types of tool - path), first one was conventional tool - path machining (contour parallel tool - path), and the second was by using TRUEMILL technique (true engagement controlled tool - path) by Surfcam V5. Thirty experiment have been designed, four of them have been failed, ten have been accomplished and the others neglected for reasonable causes as it will be discussed. Finally a comparison between the two techniques has been made focusing on machining time, material removal rate, cutting temperature and surface roughness. The results confirm that TEA control leads to reduce machining time, we have a time reduction in about (80%) for contour machining and (57%) for pocket machining. Cutting heat was under control though the feeds and the axial depths of cut went higher, also by controlling tool engagement angle we skipped the cause of failure of some experiment in conventional tool - path machining. Surface roughness was not that affected by controlling tool engagement angle, the minimum surface roughness in hand is (0.43 µm), it is higher than the best result of a previous work for the same material by 50%.

سلوك المواد فائقة اللدونة ذات البنية المجهرية الناعمة لسبيكة المغنيسيوم نوع AZ31B والمشكلة بواسطة التشكيل العالي الانفعال == Superplastic Behavior of Fine Grained AZ31B Magnesium Alloy Processed By Severe Plastic Deformation

Author name: زياد طارق عبد الوهاب
Supervisor name: ازل رفعت اسماعيل
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: Superplastic properties and microstructure evolution of commercial AZ31B magnesium alloy processed by two different severe plastic deformation methods Equal Channel Angular Pressing (ECAP) and Equal Channel Angular Rolling) ECAR) were studied. Samples were tested in tension at temperature of 623 K and strain rate ranging from 2.4×10 - 4 1×10 - 2 s - 1. ECAP die with 10 ×10 mm cross section channel, oblique angle of ?=90° and ?=13° was designed to refine the alloy microstructure at temperature of 473 K using route BC. Application of ECAP showed a remarkable grain refinement for AZ31B Mg alloy from 14.1 to 2.1?m after three ECAP passes. Maximum superplastic elongation of 261% was achieved at 623 K and strain rate of 2.45×10 - 4 s - 1. The measured strain rate sensitivity was m = 0.33 demonstrating that viscous glide control creep was the dominant deformation mechanism. In most investigation used ECAR process, the die temperature was set to room temperature, in order to avoid cracking intermediate annealing was used for AZ31B Mg alloy which has poor formability at room temperature. This is caused by a lack of active slip systems, especially in the <c+a> direction. However, in this study a special isothermal ECAR die capable of operating without intermediate annealing was used to process AZ31B Mg alloy. The ECAR was carried out at 623 K using a die of ?115 ° channel angle and without rotation. Processing by ECAR showed less effect on the microstructure refinement where the grain size was reduced from 10?m to 4.2?m after six ECAR passes. ECAR increases the yield and ultimate stress and decreases the elongation corresponding to increasing the number of ECAR passes, the as - received material exhibits large amount of superplastic elongation compared to ECAR processed specimens. Therefore superplastic behavior of the AZ31B magnesium alloy was evaluated at temperatures 623 K and strain rate ranging from 7.8×10 - 4 s - 1? 1×10 - 2 s - 1. The test showed that maximum elongation of 367% can be achieved at 623 K and strain rate of 7.8×10 - 4 s - 1. The strain rate sensitivity (m) was evaluated by two different methods, uniaxial tensile test on the basis of the true stress true strain curve and by strain - rate jump test. The results show small differences between the two method) m = 0.42 - 0.45), which demonstrate that the grain boundary sliding (GBS) is the dominant deformation mechanism during superplastic test Keywords : Superplasticity. Severe plastic deformation. AZ31B magnesium alloy.

نظام ذكي لتقييم الخشونة السطحية لعملية تشكيل الصفائح التزايدية == Intelligent Surface Roughness Evaluation System of Ismf Process

Author name: اوس خالد ابراهيم
Supervisor name: وسام كاظم حمدان
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: تعد عملية تشكيل الصفائح التزايدية تقنية حديثة نسبيا لتشكيل الصفائح المعدنية والتي توفر امكانية تصنيع اجزاء معقدة الشكل وذلك باستخدام مكائن التفريز المبرمجة (CNC milling machines) بدون الحاجة الى قوالب خاصة لكل منتج والتي تتطلب وقتا طويلا للتصنيع مقارنة مع | Incremental Sheet Metal Forming (ISMF) is a modern sheet metal forming technology which offers the possibility of manufacturing 3D complex parts of thin sheet metals using the CNC milling machine. The surface quality is a very important aspect in any manufacturing process. Therefore, this study focuses on the surface quality of parts produced by single point incremental forming (SPIF) process. As a consequence, the objective of this study is to control the surface roughness by studying five forming factors, namely; (tool diameter, step size, tool shape, rotational speed and slope angle).In order to evaluate the surface quality, practical experiments for forming pyramid like shapes have been carried out on sheets of aluminum AA1050 with thickness 0.9 mm. As a result, two Adaptive Neuro - Fuzzy Inference systems (ANFISs) are conducted for predicting the surface roughness. The first system depends on the five forming factors as a direct contact estimation method while the second system utilizes contactless parameters (average gray level, standard deviation and mean frequency) that are extracted from the products images using a vision system as a contactless prediction method. A third model is developed using Sugeno Fuzzy Inference System (SFIS) for the evaluation of forming factors by which the surface roughness for a certain slope angle is obtained.Both quantitative and qualitative assessments have been used to explore the effects of the five forming factors on surface quality of parts produced by SPIF process. The ANOVA and MEP results show that the incremental step size and the forming tool shape are the most important factors affecting the surface roughness. These two factors are directly and inversely proportional to the surface roughness respectively. The maximum and minimum surface roughness, which is achieved from all the 24 experiments is (Ra = 4.3 & Ra = 0.18 µm) respectively. As a result, a surface with roughness smaller than the initial roughness of the sheet (0.27 µm) has been obtained. The qualitative assessment reveals that the surface roughness tends to increase towards the part deep.It can be concluded that the image based estimation of roughness using ANFIS is superior in terms of prediction accuracy. This vision system can achieve (97.856%) testing prediction accuracy compared to (85.799%) that is reached by the direct contact estimation of roughness. Conclusions also show that the vision system is capable of predicting the surface roughness of a hyperboloid part as a non - linear shape with prediction deviation (14.411%), thus enabling to evaluate the surface quality of complex parts that cannot be measured by the stylus. It can also be concluded that the SFIS is a successful approach for estimating the forming factors by which the surface roughness for a particular slope angle is obtained.

التفريز المبرمج باستخدام ملفات STL == Cnc Milling Using Stl Files

Author name: نادية سامي حسن
Supervisor name: ليث عبد الله محمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: تعد ملفات (STL) من الملفات المهمة في برامج الرسم والتصميم المعان بالحاسوب (CAD) والشائعة الاستخدام حاليا في النمذجة السريعة وانظمة التصنيع المعان بالحاسوب (CAM). يتناول هذا البحث اقتراح وتطوير خوارزميات لقراءة ملفات (STL) واستخلاص السمات الهندسية اللازم | Stereolithography (STL) files are considered very important files in both computer aided drawing and design (CAD) programs and are commonly used now days in both rapid prototyping and computer aided manufacturing (CAM) systems.This thesis proposes and develops algorithms to read (STL) files and extract engineering entities required in CNC milling processes. The proposed algorithms are dependent on some mathematical modeling and manipulations of the engineering model by slicing an (STL) file to many slices and then building the required algorithms to adopt these slices to generate CNC machining paths as G - Code.The proposed system in this work is divided to three parts, in the first part of this thesis an algorithm is proposed to extract engineering object entities to some proposed models based on their (STL) files using Matlab program. The proposed models include cube, cylinder, dome, cone and cavity models. In the second part of this thesis, a slicing algorithm is proposed to enable the slices along the proposed models z - axis to find and navigate the required manufacturing data. UGS CAM program was used also to generate the tool paths and to simulate the machining process and then generate NC part program of the proposed objects (G - Code). The machining process was achieved using 3 - axis CNC milling machine, at spindle speed of (700 rpm) and feed rate (60 mm/min).Finally, the third part of this thesis includes comparing results produced based on both (STL) and (UGS), to achieve the required aim by experimentally comparing both objects surface roughness and evaluate their geometrical variations.According to the experimental results, the objects produced using STL models are clearly have rough surfaces compared with the surfaces produced by UGS with average percentage of 13µm, and according to the geometrical variations experiments, CAD readings are in good agreement with experimental results and confirm the validity of the proposed approach with 4.5mm of shape error.

دراسة مقارنة بين T - spline وNURBS في النمذجة والتشغيل باستخدام ماكنة التفريز المبرمجة == Comparison Study of T - Spline And NURBS In Modeling And Machining Using CNC Milling Machine

Author name: مهند مصدق جعفر
Supervisor name: ليث عبد الله محمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: نمذجة السطوح باستخدام تقنية الـ (T - spline ) تعد من اهم الوسائل المتسخدمة الان في التصميم المعان بالحاسوب (CAD).يهدف البحث الى زيادة الانتاجية من المنتجات المعقدة من خلال تعزيز عملية النمذجة السطحية للمنتج وتعزيز التصنيع باستخدام T - SPLINE للنمذجة السط | Surface modeling utilizing T - spline technique is one of the most important tool now in computer aided design (CAD).ThisThesisaims to increase the productivity of complicated products through enhancing the process of product surface modeling and manufacturing by using T - spline for surface modeling. This method provides the designer with many powerful tools to add details only where necessary on the CAD modeling, create non - rectangular topology of the surface, easily edit complex freeform models, and besides maintaining NURBS (non - uniform rational B - splines) compatibility of the model.ThisThesisuses T - spline for surface modeling and compare it with NURBS modeling to get the best modeling points between the two methods. The comparison will be through surface analysis and manufacturing process.ThisThesisincludes design of two types of models : convex model (bicycle seat) and concave model (longitudinal section of the bottle) for each T - spline surface and NURBS surface using Rhinoceros 5.0 software which has been transformed to UG - NX8.5 software to get the machining process simulation and G - code programs for the models. The models have been machined using 3 - axis vertical CNC machine (C - tek) type.Finally, analysis of surfaces (Environment Map analysis, Zebra analysis, Naked Edges analysis, Gaussian Curvature analysis, data structure analysis, Draft Angle analysis) by Rhinoceros 5.0 software and measurement of the roughness by Pocket Surf equipment and measurement runtime for machining by timer, shows that the T - Splines surfaces typically have (50 - 70%) less geometric data structure [ surfaces , 3d curve , 2d curves , vertices , edges , trims , loops , faces ] than the equivalent NURBS surface, inEnvironment Map analysis, the image of T - Spline surface for the models is reflected moreclearly than a NURBS surface, in Naked Edges analysis, the T - Spline surface for the models has a number of naked edge less than the NURBS surface, in measurement runtime for machining (roughing and finishing), the T - spline surface for the bicycle seat model is machined in (16 minutes) less than machining the NURBS surface, and the T - Spline surface for the longitudinal section of the bottle model is machined in (10 minutes) less than machining the NURBS surface. In measurement of roughness, the T - Spline surface for the bicycle seat model has (2.4861 µm) average (Ra) for patches measured roughness average (Ra), and the NURBS surface has (4.9216 µm) average (Ra) for patches measured roughness average (Ra).

تحليل مسار العدة في عملية التشكيل التزايدية للصفائح المعدنية == Analysis of Tool Path In Incremental Sheet Metal Forming Process

Author name: ميثم سعد علي
Supervisor name: وسام كاظم حمدان
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: التشكيل التزايدي للصفائح المعدنية هو عملية مرنة للغاية ومتعددة الاستعمالات للتصنيع السريع لاجزاء الصفائح المعدنيه المعقدة حيث تمتلك امكانية التكيف بامتياز مع انظمة التحكم الرقمي بالحاسوب (مكائن التفريز المبرمج CNC) من خلال السيطرة المباشرة على بيانات CAD | Incremental sheet forming (ISMF) is a highly versatile and flexible process for rapid manufacturing of complex sheet metal parts. It has excellent adaptability to computer numerical control (CNC) systems through direct control of CAD data, minimizing the use of specialized tooling and presses. A sheet of metal is formed by a progression of localized plastic deformation using simple forming tool controlled by a CNC machine - tool. The aim of the presented thesis is to investigate the feasibility of incrementally forming of 3D complex shape (like automotive heat shield shape) and the solar cooker shape by Single Point Incremental Forming process without using a dedicated die depending on different tool paths. Six different forming tool paths (unidirectional ZLVTP, bidirectional ZLVTP, FPRTP, ZGZTP, BSLTP and HSLTP) were generated byUnigraphics - NX8 (UGS - NX8) programing system and applied to realize solar cooker shape and automotive heat shield shape. The feasibility investigation and development of automotive heat shield shape is based on three control factors are tool path type, forming tool head shape and the Z - increment (vertical pitch). For each of these factors, levels were tested. The tool head shape and vertical pitch contain their both on two levels while the tool path type on six levels. Hence, 24 experiments applied to realize automotive heat shield shape based on a full factorial design of experiments, and 6 experiments applied to realize solar cooker shape. Hybrid tool paths are tested to explore the applicability these paths in ISMF process. This thesis discussed the impact of tool paths types and other control factors (tool shape and vertical pitch) on the three different quality characteristic namely geometrical accuracy, thickness variation and forming time. The significant of the control factors are explored using two statistical methods are analysis of variance ANOVA and main effect plot. All experiments were carried out on sheets of Aluminum Alloy (AL1070) with thickness 1.5 mm by using 3axis CNC machine. The CNC machine and dial gauge are used to measure dimensional accuracy and final thickness of formed parts respectively. Depending on the results of this work, Helical - Streamline tool path (HSLTP) and follow periphery tool path (FPRTP) are achieved higher geometrical accuracy when forming the solar cooker shape and the automotive heat shield shape respectively. On the other hand, Z Level profile tool path (ZLVTP) is the best tool path to achieve homogeneous thickness distribution and minimum forming time of formed parts. Hybrid tool paths are undesirable in incremental sheet metal forming. The ANOVA results show that all control factors have influence on the accuracy, especially the tool path type. The tool shape and vertical pitch have no influence on the thickness of the formed parts. But, the vertical pitch has major effects on the forming time and accuracy. In contrast, the tool path shape has a great influence on the process implementation.

التحقيق التجريبي والعددي للصفائح الرقيقة المثقوبة تحت الشد == Experimental And Numerical Investigations of Thin Tensioned Plates With Holes

Author name: ارشد عبد الله راشد
Supervisor name: كريم محسن يونس
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: ان الصفائح المثقوبة تستخدم عالميا في تصنيع الھياكل في التطبيقات الميكانيكية والانشاءات كمثال على ذلك ھياكل الطائرات والتراكيب الطبية ووصلات الربط الخ. ومن المعروف جيدا ان استعمال الثقوب في الھياكل المجھدة تولد اجھادا موقعيا عاليا في منطقة من الثقب تعرف بم | The plates with holes are used in cosmopolitan for manufacturing structures in mechanical and civil engineering applications like aircrafts, medical structures, joint connection applications etc. It is well known that utilizing holes in stressed structures produces highly localized stresses at area of the holes known as the stress concentration area,which leads to reduce the mechanical strength of the structures.The main objective of this study is to investigate the effect of three parameters on the stress concentration factor in plate with two holes having different size holes and subjected to uniaxial tension. The three parameters include firstly, the location of holes when oriented with respect to axis of loading, parallel, transverse and inclined with line of uniaxial tension load at different angles. Secondly, the aspect ratio for the hole size (large to small radius).The last parameter effect is the distance between two holes.Numerical simulation using finite element method for two - dimensional model is developed to determine the maximum value of Von Mises stress with commercial software package ANSYS V.11.The experimental photoelastic technique is carried out on fabricated polycarbonate model loaded in one direction. From the analysis of the results, it is found that the maximum stress concentration factor is at the point tangent to the edge of the hole. The comparison between the finite element method and experimental photoelastic technique results showed the stress concentration factor, which obtained experimentally and with finite element method are congruent, since the maximum variation between the two results is about 7.03% As well as the highest and lowest value of the stress concentration factor equal to 3.1973, 2.0640 at value of angle 60°, 90° respectively.It is recommended from the above conclusions that manipulating the three parameters which effect the stress concentration factor are namely, holes position, size, and distance between two holes on the plate that used in the application will play essential role to reduce the value of stress concentration factor which subsequently crucially minimize or avoid fast failure. This can be translated into saving precious lives preventing money wastage due to structures damage ending into catastrophe.

فحص بلى عدة القطع المعان بالرؤيا الحاسوبية خلال عملية الخراطة == Computer Vision Aided Inspection of Cutting Tool Wear In Turning

Author name: علي كريم علوان العكيلي
Supervisor name: علي عبار خليف
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
Abstract: في الوقت الحاضر , تحظى مكائن القطع المبرمجة باھمية كبيرة في المعامل والورش التصنيعية بسبب دقتھا العالية ومرونتھا لكن لسوء الحظ لا تزال ھذه المكائن غير قادرة على التاكد من جودة السطوح المنتجة. الاتجاه نحو اتمتة عمليات القطع سير للحاجة الملحة للحصول على ج | Nowadays, computerized numerically controlled (CNC) machines have high importance in manufacturing factories and workshops due to their high accuracy and flexibility. Unfortunately they still cannot ensure the quality of machined products. The trend towards automation in machining has been driven by the need to maintain high product quality with improving production rate, these improvements can be possible by monitoring and control of machining process. In this research a vision based monitoringsystem was introduced for the on - line direct automated measurement of the cutting tool flank wear width based on a new algorithm on the basis of canny edge detection and morphological operations for the captured images.Twelve specimens were prepared using STARCHIP CNC turning with four cutting speeds (57,98,110 and 125 m/min) and three depths of cut (0.5,1 and 2 mm) and constant feed of (0.04 mm/rev). Maximum and minimum absolute error and error percentage in the maximum flank wear width was (0.058,0.002 mm) (9.7,0.54 %) respectively. The results show the effectiveness of the proposed method in the monitoring of the tool condition.Also, Vision based monitoring system was proposed for the measurement of tool nose wear which have direct interaction with the workpiece during machining. Measurement operation is done by comparing reference and worn tool images; the algorithm is composed of image preprocessing, Otsu thresholding, conforming method for the exact alignment between the two images and image subtraction is performed in order to detect the nose wear area. Morphological opening by reconstruction was used to remove isolated foreground pixels result in due to the quantization errors. The maximum and minimum error percentage in tool nose wear area (6.72,0.48 %) respectively; the experimental results show that nose wear occurs after the flank wear exceeded its maximum standard limit in roughing operations Keywords : tool wear, flank wear, nose wear image processing, automated visual inspection, tool condition monitoring.

دراسة تاثير ظاهرة الرجوعية على عملية الحني == Study Effect of The Spring Back Phenomenon On The Bending Operation

Author name: عبد الله حمد صنكال العيثاوي
Supervisor name: جمال حسين محمد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

التحليل العددي للتزييت الهيدروداينميكي والتزييت الهيدروداينميكي المرن في عملية البثق على البارد == Numerical Solution Of Hydrodynamic And Elasto - Hydrodynamic Lubrication In Cold Extrusion

Author name: مثنى حمزة سعدون
Supervisor name: جمال حسين | سومر متي
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

دراسة تاثير الشد الامامي على انسيابية المعدن خلال عملية الدرفلة وباستخدام طريقة اللدونة المرئية

Author name: محمد شمران جبير
Supervisor name: جمال حسيـن محمـد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: Arabic
University location: Baghdad
First pages:

استخدام مسيطر المنطق الضبابي للسيطرة على الدرفيل القائد في عملية درفلة الحلقات على البارد == Implementing Fuzzy Logic Controller For Guide Roll On Cold Ring Rolling

Author name: مهند محمد حسين الخفاجي
Supervisor name: جمال حسين محمد | جن ونليانغ
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Doctorate
University: University of Technology
Language: English
University location: Baghdad
First pages:

المتغيرات المثلى لظاهرة الرجوعية في عملية الحني == Optimization Of Process Parameters For Spring Back Phenomena In Bending Operation

Author name: خالدة كاظم منصور
Supervisor name: كريم محسن يونس | اسيل حمد عبد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تاثير عوامل التشغيل الكهرو كيميائي على معدل ازالة المعدن و الخشونة السطحية == Influence Of Electrochemical Machining Parameters On Metal Removal Rate MRR And Surface Roughness

Author name: باقر اياد احمد
Supervisor name: سعد كريم شذر | صلاح عبد الله عبد
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

التصميم والتصنيع المعانين بالحاسوب لتوليد السطح الثلاثي الابعاد باستخدام طرق الملائمة و الاستكمال == CAD/CAM 3D Surface Generation By Using Fitting And Interpolation Methods

Author name: عمر احمد رحيم
Supervisor name: تحسين فاضل عباس
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:

تحقيق في بلى عدد القطع في القطع العمودي باستخدام طريقة العناصر المحددة == Investigation Of Tool Wear In Orthogonal Cutting Using FEA

Author name: مهند هيثم غني
Supervisor name: معن عابد توفيق
General topic: Production engineering metallurgy and materials
Specific topic: Production Engineering
Degree: Master
University: University of Technology
Language: English
University location: Baghdad
First pages:
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