This document provides an introduction to computer aided design and manufacturing (CAD/CAM). It discusses the product development cycle, various design processes, and the advantages of concurrent engineering over sequential engineering. It also describes CAD systems and their architecture, as well as computer graphics topics like coordinate systems, 2D and 3D transformations, line drawing algorithms, and viewing transformations. Key CAD applications and benefits are outlined. The document provides details on several CAD and design related topics at a high level.
computer-aided design and computer-aided manufacturing) refers to computer software that is used to both design and manufacture products. ... CAD/CAM applications are used to both design a product and program manufacturing processes, specifically, CNC machining.
computer-aided design and computer-aided manufacturing) refers to computer software that is used to both design and manufacture products. ... CAD/CAM applications are used to both design a product and program manufacturing processes, specifically, CNC machining.
The slide presents introduction to computer aided design and drafting, and introduction to AutoCAD software. 2D and 3D modelling using AutoCAD software is presented.
Towards smart and competitive sustainable machiningLiu PeiLing
Computer Numeric Control (CNC) revolutionized the machining technology and has been the cutting edge of digital manufacturing since 1950s. CNC machining model, simulation,
verification, and optimization have been a vivid research topic of Smart Machining that automated the CNC programming (CAM) and cutting process, hence greatly increased machining productivity since 1990s. This paper traces back the history of CNC simulation, analysis the different CNC machining models, tested with application examples, and listed different CNC verification industry applications for the last 20 years. The new challenge comes from sustainable manufacturing. Towards mart and competitive sustainable machining, CNC model and simulation will be used to optimize the machining process, where the raw material could be saved through First Part correct technology, the energy could be saved through cutting speed optimization, and used parts could be saved by remanufacturing.
Towards smart and sustainable machiningLiu PeiLing
Computer Numeric Control (CNC) revolutionized the machining technology and has been the cutting edge of digital manufacturing since 1950s. CNC machining model, simulation, verification, and optimization have been a vivid research topic of Smart Machining that automated the CNC programming (CAM) and cutting process, hence greatly increased machining productivity since 1990s. This paper traces back the history of CNC simulation, analysis the different CNC machining models, tested with application examples, and listed different CNC verification industry applications for the last 20 years. The new challenge comes from sustainable manufacturing. Towards smart and competitive sustainable machining, CNC model and simulation will be used to optimize the machining process, where the raw material could be saved through First Part Correct technology, the energy could be saved through cutting speed optimization, and used parts could be saved by remanufacturing.
EXTREMELY LOW COST SCANNING SYSTEM FOR FREE FORM SURFACESijmech
Reverse engineering is the process of reconstructing a computer model for physical object based on 3D data point captured from the surface of the object. This work presents a low end and extremely cost effective technique for representing the free form surfaces of physical objects in a CAD model. An analogue signal was used to acquire the free form surface data unlike conventional methods like laser scanners or Coordinate Measurement Machines (CMM). The surface was scanned using a Linear Variable Differential Transducer, (LVDT) as position sensor for measuring the data from the surface of the object. The analogue signal was acquired through a data acquisition system in a continuous fashion to PC. Solid works CAD/CAM software was used to obtain the free form surface from the acquired 3D data using spline technique.
A dedicated system was constructed to collect data using vertical milling machine. The benefit of this scanning technique is the ability to scan the target free form surface of the physical object in the following aspect: cost effective scanning technique, low end acceptable accuracy, speed and ease of calibration. Special software was built to minimize the data acquired during the scanning operation for reducing modeling time.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
3. SYALLABUS
Product cycle
Design process
Sequential and concurrent engineering
Computer aided design – CAD system architecture
Computer graphics – co-ordinate systems- 2D and 3D transformations -
homogeneous coordinates
Line drawing -Clipping- viewing transformation
4. Product cycle
The cycle through which a product goes from development to
retirement is called product life cycle.
The product cycle starts with developing the product concept,
evolving the design, engineering the product, manufacturing the
part, marketing and servicing.
The product undergoes the following two main processes
Design process
Manufacturing process
5.
6. DESIGN PROCESS
Design is an activity that needs to be well organized and should take into
account all influences that are likely to be responsible for the success of the
product under development.
The following models are considered in design purpose
Shigley
Pahl and Beitz
Ohsuga
Earle
11. MORPHOLOGY OF DESIGN
Morphology design refers to the study of the chronological structure of
design projects.
It is defined by seven phases and their sub steps. Out of seven phases, the
first three phases belong to the design the proposed by asimow and the
remaining four phases belong to production, distribution, consumption and
retirement.
12.
13. SEQUENCIAL ENGINEERING
Three major phases of conventional manufacturing process are design,
process planning and manufacturing.
All these phases are sequentially carried out.
14.
15. CONCURRENT ENGINEERING
It is the methodology of restructuring the product development activity in
a manufacturing organization using cross functional team approach.
16.
17. COMPARISION BETWEEN SEQUENTIAL
AND CONCURRENT ENGINEERING
Product development cost
Number of design changes
Lead time for product development
Customer satisfaction
Coordination between departments
18.
19.
20. COMPUTER AIDED DESIGN
Groover and Zimmers defined “CAD is the technology concerned with the use
of computer systems to assist the creation, modification, analysis and
optimization of a design”.
21. Roles of CAD in Design
Accurately generated and easily modifiable graphical representation of the
product.
User can nearly view the actual product on the screen, make any
modification to it and present his ideas on screen without any prototype,
especially during the early stages of the design process.
Complex design analysis in short time. By implementing Finite Element
Analysis (FEA) methods user can perform as follows
Static, dynamic & natural frequency analysis
Heat transfer analysis
Fluid flow analysis
Plastic analysis
22. Roles of CAD in Design
It records and recalls information with consistency and speed
Use of Product Data Management (PDM) systems can store the whole
design and processing history of a certain product for future reuse and
upgrade.
26. CAD SYSTEM ARCHITECTURE
It is an early model which was used for the basic geometry construction
and modelling purpose.
Four major components of CAD System Architecture are
1. Database
2. Operating system
3. Input/output devices
4. User interface
27.
28.
29. COMPUTER GRAPHICS (CG)
Computer graphics is a technology which uses the display of the drawing or
the geometric model of the component in CAD.
CG may be defined as the process of creation, storage and manipulation of
drawings and pictures with aid of a computer.
It is an extremely effective medium for communication between users and
computers.
There are two types
1. Passive CG
2. Interactive CG
32. ADVANTAGES OF COMPUTER
GRAPHICS
The object drawings can be denoted by its geometric model in three
dimensions. i.e. X, Y, Z coordinates.
Accurate drawings can be made.
Sectional drawings can be easily created.
Modification of geometric model of objects is easy.
It is easy storage and retrieval of drawings.
33. APPLICATIONS OF COMPUTER
GRAPHICS
Paint programs
Design programs
Presentation graphics software
Animation software
CAD software
Desktop publishing
Education and training
Image processing
34. CO-ORDINATE SYSTEMS
In general, there are two types of co-ordinate system
1. Cartesian – Linear distances X,Y and Z
2. Polar – Angles such as θ, α, φ
35. Left hand and right hand co-ordinate systems
Multiple co-ordinate systems
World co-ordinate system
Object co-ordinate system
Hierarchical co-ordinate system
View point co-ordinate system
Model view co-ordinate system
Screen co-ordinate system
View port co-ordinate system
37. 2D & 3D
(GEOMETRIC)TRANSFORMATION
A geometric transformation is an operation that modifies
its shape, size, position, orientation etc. with respect to its
current configuration operating on the vertices.
Some of the important transformations are
Translation
Scaling
Rotation
Reflection
Shear
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38. 2D & 3D TRASLATION
,
, ,
x y
x
y
x x t y y t
tx x
ty y
P P T
P P T
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38
2D FORMULA 3D FORMULA
39. 2D & 3D SCALING
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39
2D FORMULA 3D FORMULA
,
0
0
x y
x
y
x x s y y s
sx x
sy y
P S P
40. 2D & 3D ROTATION
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40
2D FORMULA 3D FORMULA
41. HOMOGENEOUS TRANSFORMATION
The three dimensional representation of two
dimensional plane is called as homogeneous
representation and the transformation using
homogeneous representation is called
homogeneous transformation.
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43. LINE DRAWING
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Straight line segments are used a great deal in computer generated
pictures. The following criteria have been stipulated for line drawing
displays:
i. Lines should appear straight
ii.Lines should terminate accurately
iii.Lines should have constant density
iv.Line density should be independent of length and angle
v.Line should be drawn rapidly
44. DDA ALGORITHM
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A popular method uses an algorithm known as “Digital Differential
Analyzer” which generates lines from their differential equations.
For a line segment joining two points P1 and P2, a parametric
representation is given by
P(u) =P1+(P2-P1)u
In terms of x(u) and y(u)
x(u) = x1 + (x2-x1)u
y(u) = y1 + (y2-y1)u
45. BRESENHAM’S LINE ALGORITHM
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The basic principle of Bresenham’s line algorithms is to select the optimum
raster location to represents a straight line.
To achieve optimum raster scan, the algorithm always increments either x
or y by one unit depending on the slope line.
The increment in the other variable is determined by examining the
distance between the actual line location and the nearest pixel.
This distance is called decision variable or error.
46. CLIPPING
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If any part of the geometry is not inside the window, it is made invisible by
the graphic software is called clipping.
49. VIEWING TRANSFORMATIONS
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Displaying an image of a picture involves in mapping the co-ordinates of the
picture into the appropriate coordinates on the device where the image is to
be displayed.