Engineering design Essay Example


In engineering design, the CAD tools help in the designing processes. The CAD tools help in calculating the manufacturing, functional and operational parameters of the machining products. The CAD systems are used differently in the different industries. However, in any designing processes, the virtual components must be considered in relation to the machining tool functions. The report introduces one to the CAD functions in the engineering design process. It focuses on the CAD features and its software’s to show the design practices of the model. It includes presenting an outline on the importance of the CAD in engineering designs of tools and graphics.

The report focuses on the assembling of a pulley that is used in the production process. The report presents the features of the CAD and the software to assist in its functions in the production processes. The design of the pulley is already approved, where the CAD visual sketches are provided to show some of the applications of the CAD features and how the CAD software’s help improve the performance of the machining tool, through showing the commands used in the development of the sketches.


CAD is an important software in many industries through the designing of the tools. The CAD helps in improving the design automations while considering time efficiency. The CAD helps in increased productivity through automation as it provides accurate curves in three and two dimensional space. The CAD has two main components, which include the software and hardware design functions.

In the engineering design process, the computer based technology has helped in the modification of the existing designs, improvement and the development of new superior products. The report begins by explaining the features of the CAD, and is followed by a visual sketch of the Pulley components. The report explains the software that helps in the development of the given sketches, through presenting the commands used in the development of the sketches while using the CAD model. The discussion of the report presents how the design concept of the pulley sketches are used and meet the manufacturing requirements of the BS8888 when the CAD model is applied.

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Computer-Aided Design presents the processes of using the computer systems to assist in the design optimization, analysis, modification and in the creation designs. That is; it is a computer system that helps improve the productivity of a designer while improving the quality and other communications of a design either electric, machining products or manufacturing outputs among many others. Thus, the Computer-Aided Design (CAD) has numerous features that influence its accuracy in productivity and quality.

The computer-aided design system features are numerous. For instance, the CAD presents that when making designs one can erase and redraw besides the increased possibility of magnify the designs. The designed images can be viewed from any angles. Thus, the main features of the CAD are that it offers a greater accuracy in designing the tools and making the drawings. The objects include the drawings designed using the 2D and 3D CADs. More importantly, the designing using the CAD provides the powerful scaling and rotation through the reflection options including the engineering components that increases the efficiency in terms of costs.

The features of the CAD mainly include the properties of position, dimensions and other forms that improve modelling. The systems help integrate the designs of the tools that enable the simulation of the manufacturing sequences. Solid modelling presents one of the main features of the CAD. That is; it includes the creation of the engineering drawings from the solid models through the surface modelling. It increases the automations of the designs including the applications of the re-usage of the design components.

The hardware and software system of the CAD systems helps in the designing of the functions of the pulley machine. The CAD software includes the programs of a computer such as the graphics that run the CAD by facilitating the engineering functions of the machining product. The software’s are important in helping in the improvement of the productivity, quality and interactions through the process of manufacturing and documentations (Omura, 179). The CAD software’s help in improving the efficiency of the systems through the increased accuracy in the heat transfer calculations, strain and stress analysis and other dynamic responses.

The CAD software helps in the efficient management of engineering projects that include the graphical interfaces while supporting solid modelling. The finite element software uses numerical engineering applications to send commands to the machining product to develop and make certain holes among others in a given material (Autodesk, 57).

Pulley Assembly

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The diagram above presents a 3D-CAD pulley model. The pulley is meant to support the movement as it turns on an axle to support the movements. The pulley consists of two main parts as will be discussed below.

It has a pulley fork, pulley wheel and pulley top bracket, which are modelled using the CAD model as will be presented below, including the CAD commands used to develop this final output product to be used in the production process.

Pulley Fork

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he projection above presents the chamfer, the thread and where the holes will be drilled for the assembly to the pulley. It includes accurate estimates of the size of each component to ensure it fits perfectly into pulley shown above. According to the BS8888, in each drawing the every symbol or line presents something. The finite element software was used alongside the CAD to develop the above drawing. Engineering design 7Engineering design 6Engineering design 5Engineering design 4Engineering design 3T

Pulley Wheel

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The orthographical presentation above of the pulley wheel including the technical specifications of the wheel such as sizes of all sections. For instance, it shows that the chamfer ends are both 0.5 * 45o from both ends.

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The figure presents the CAD presentation of the top bracket of the pulley. For instance, it presents that the technical requirements for the Hole through at the ends and in the center among others. The CAD system will send a command to the machining system to drill holes through the given estimates.


The pulley presented in the report consists of three main parts. Namely, the pulley fork, the pulley wheel and the pulley top bracket. The pulley is anticipated to be used in the manufacturing industry in Nottingham in the production process. The design concept of the pulley has already been accepted. Thus, the report helps understand how the CAD model was used to ensure the three components drawings are acceptable (Ajeet, 305). Below, the report includes an analysis of whether the drawings meet the BS8888 requirements regarding the development of drawings using the CAD model.

The CAD finite element software was used to develop the drawings presented above. The commands used were the line commands, circles, polygons and rectangles. The commands used followed the following procedure for the pulley fork (Omura, 189).

Command 1: Line..

Point 1: It was chosen on the screen

Point 2: it was chosen on the screen

Point 3: ”””””

Command. Enter

The circle commands

Two main points on the circle were used.

Command: Circle

Point 1: center point was chosen on the screen

Point 2: radius of the circle was chosen

Point 3: diameter of the circle was chosen

Command: enter

After all necessary specifications were given, the lines and the circle were developed. Other commands included identifying the line to specify what the drawing should mean including the size dimensions, location and mating dimensions among other symbology information as presented in the drawings. The Pulley fork, wheel and top bracket drawings are illustrations of the orthographic plan of the pulley assembly. According to the BS8888, all CAD drawings must sufficient symbology information including the geometrical product specification. The drawings are presented in both landscape and portrait forms where the dimension of each part are given in millimetres. In each of the orthographic drawings presented above, various lines and angles among other symbols are used to represent something such as presented below.

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The short chain and continous lines are very dominant in the three drawings, and have their different representations. The three CAD diagrams presented, provide the approximate dimensioning methods that are used to draw the pulley fork, wheel and top brackets. For instance, regarding the pulley fork, the screw thread is presented as a male threat that can be cut or rolled using a die. For the puller wheel, the serrations marked 60o help push the fit component of the pulley designed. Thus, the CAD features are presented through the pulley drawings through how they help in ensuring accuracy of the dimesions given to fit into the anticipated pulley design. The features include ensuring accuracy in the calculatio of the dimesions of the pulley to ensure each part fits into its section in the designed pulled. The software features help to include accurate arthographic representations of the drawings as depicted below.


The CAD in machining is a very important tool in the engineeringof almost all products. CAD helps in the accurate development, improvement and modifications of complex products with many components. The use of the CAD softwares and hardwares helps in the automatic detection and accuracy of the system parts such as the pulley fork, and wheel. The finite element software and the BS8888 standards play a very important role in ensuring the accuracy of the engineering of products such as the pulley shown above. The CAD in engineering of products helps to process the metadata that is then used to make and develop the perfect dimensions such as those given in the drawings presented. The CAD in engineering of products leads to the increase of the accuracy in the precision of the tools.

Works Cited

Ajeet, Singh. Machine Drawing: Includes AutoCAD. New York: Tata McGraw- Hill Education, 2008.

Autodesk. «Finite Element Analysis in Practice.» Instructors Manual: Autodest Algor Simulation Professional 2011 (2010): 1-266 Retrieved from:

Omura, George. Introducing AutoCAD 2009 and AutoCAD LT 2009. New York: John Wiley & Sons, 2008.


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Command Dimensioning

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