olsjdt.files.wordpress.com€¦ · web viewexplain how these commands can impact upon engineering...

BTEC NATIONAL EXT DIPLOMA IN ENGINEERING

LEARNER NAME ASSESSOR NAME

N. Hodgson

DATE ISSUED HAND IN DATE SUBMITTED ON

Criteria Evidence FeedbackP3 - Produce 2D CAD detail drawings of five components that make up an assembly or sub-assembly to given standards, using appropriate commands

Completion of task 1

P5 - Produce an assembly drawing and exploded view of an assembly or sub-assembly containing at least five parts, using appropriate commands.


P6 - Interpret the properties of an engineering component or circuit from a given CAD drawing


M2 - Explain how the range of commands used to produce CAD drawings can impact drawing production


This brief has been verified as fit for purpose

Internal Verifier ANTHONY SPICER

Signature A J Spicer Date

17/08/2012

Student declaration

I declare that all the work submitted for this assignment is my own work or, in the case of group work, the work of myself and the other members of the group in which I worked, and that no part of it has been copied from any source.

I understand that if any part of the work submitted for this assignment is found to be plagiarised, none of the work submitted will be allowed to count towards the assessment of the assignment

Signed …………………………………… Date ……………………………………

Our Lady & St John Catholic College Engineering 1

UNIT 17 – Computer Aided Drafting in Engineering (A/600/0267)

ASSIGNMENT TWO – 2D CAD PORTFOLIO

Our Lady & St John Vocational Centre

Assessor's commentsQualification Edexcel Lev 3 National Diploma in

EngineeringAssessor name N. Hodgson

Unit number and title

Unit 17 – Computer aided drafting in Engineering (A/600/0267)

Learner name

Assignment title ASSIGNMENT TWO – 2D CAD PORTFOLIO

Grading criteria Achieved?

P3 - Produce 2D CAD detail drawings of five components that make up an assembly or sub-assembly to given standards, using appropriate commandsP5 - Produce an assembly drawing and exploded view of an assembly or sub-assembly containing at least five parts, using appropriate commands.M2 - Explain how the range of commands used to produce CAD drawings can impact drawing production

Learner feedback

Assessor feedback

Action plan

Assessor signature Date

Learner signature Date

Edexcel BTEC Level 2 Extended Certificate in Engineering FX533


ASSIGNMENT OBJECTIVES

The aim of this module is to provide the learner with an introduction to CAD and to enable them to produce engineering drawings to given industry standards.

The purpose of this assignment is to provide a framework in which the learner will:

Be able to produce and interpret CAD drawings

ASSIGNMENT INTRODUCTION Computer Aided Drawing (CAD) is now used extensively throughout the engineering industry as a means of communicating drawing data to required standards. Two- and three-dimensional representations of components can be drawn and modified allowing the sharing of data from designer to customer. CAD data can be shared with CNC machines and Computer Aided Manufacturing (CAM) software, which may then assist in improving productivity, flexibility and quality of the final product.

During this assignment you are going to use computer-aided design to produce to number of 2D CAD detail drawings that use a wide range of drawing commands and that meet British Standards for Engineering drawings. These drawings will make up the majority of the evidence for this assignment so it is important that you print these and keep them in your folder of evidence.

Task 1 – 2D DETAIL DRAWINGS

P3 - Produce 2D CAD detail drawings of five components that make up an assembly or sub-assembly to given standards, using appropriate commands

Using a suitable CAD package, you are required to produce 2D CAD detail drawings for each of the components that make up the ‘G Clamp’ assembly. These drawings should be dimensioned appropriately and be presented to a standard that would be accepted in an Engineering workplace

(ref. BS8888, BS3939, BS2917)

During the production of these drawings your tutor will carry out observations and may ask you to explain the methods that you have used to carry out various operations.

Task 2 – ASSEMBLY AND EXPLODED VIEW

P5 - Produce an assembly drawing and exploded view of an assembly or sub-assembly containing at least five parts, using appropriate commands.

Using a suitable CAD package, you are required to produce an assembly drawing and an exploded view of the ‘G Clamp’ assembly. These drawings should be dimensioned or labelled appropriately and be presented to a standard that would be accepted in an Engineering workplace.Edexcel BTEC Level 2 Extended Certificate in Engineering FX533


(ref. BS8888, BS3939, BS2917)

During the production of these drawings your tutor will carry out observations and may ask you to explain the methods that you have used to carry out various operations.

Task 3 – INTEPRETING ENGINEERING DRAWINGS

P6 - Interpret the properties of an engineering component or circuit from a given CAD drawing

You are a recently qualified Engineer now working for a Small company that makes products for an Engineering Merchants

You have been asked to manufacture a prototype for a clamping device.

Your task is to now carefully study the drawing pack given to you with this assignment brief, then, answer the questions requiring you to interpret information from the Engineering drawings and other sources in order to be able to begin to manufacture the clamping device.



Extracting information from the G Clamp assembly drawing, complete the parts table below by adding the part names and the quantity required for each part

2. What is the drawing number for the G Clamp assembly drawing?

………………………………………………………………………………………

3. Dimension the rectangle below to show the minimum size of material blank required in order too manufacture the G Clamp body



1. Explain why it is necessary to create two Datum edges (datum A & datum b) in order to accurately mark out the G Clamp Body.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

2. What is the overall finished length and width of the G Clamp Body Part

………………………………………………………………………………………

3. What is the tolerance given on the length and width dimensions? Explain what this means?

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

4. Using the extract from the Zeus tapping drill chart state what is the recommended drill size for an M8 threaded hole.

………………………………………………………………………………………

Explain why the hole diameter recommended smaller than 8mm? ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

5. Using the extract from the Zeus tapping drill chart state what is the recommended drill size for the following threaded holes.

a. M2.0 x pitch 0.25 …………………………………………………….

b. M4.0 x pitch 0.50 …………………………………………………….

c. M6.0 x pitch 1.00 …………………………………………………….

d. M10 x pitch 1.50 …………………………………………………….



What material should the ‘Thread Foot’ part be manufactured from?

………………………………………………………………………………………………………………………………………………………………………………

6. From the list below choose the most suitable diameter stock bar required to produce the part

10mm 15mm 25mm 19mm

7. The drawing has been drawn by the draftsman in a scale of 2:1, explain what this means.

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

8. What is the tolerance on the final external diameter of the part?

………………………………………………………………………………………

9. The drawing requests a chamfer of 1mm X 45, what does the number 45 represent?

………………………………………………………………………………………

10.Explain what is meant by the hatched lines seen in the view labelled section A-A

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

11.What do the dotted lines on the top views represent?

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………



What material is the part ‘Handle End’ to be manufactured from?

………………………………………………………………………………………

12.From the list below choose the most suitable diameter stock bar required to produce the part

10mm 15mm 25mm 19mm

Task 4 – IMPACT OF CAD COMMANDS ON DRAWING PRODUCTION

M2 - Explain how the range of commands used to produce CAD drawings can impact drawing production

Consider the list of CAD drawing commands shown below. Explain how these commands can impact upon engineering drawings production in terms of the following,

Speed of production, how can CAD commands be used effectively to reduce the time taken to produce Engineering drawings

Accuracy of drawings, how can CAD commands be used effectively to improve or maintain accuracy

Repeatability, how can CAD commands be used effectively to improve or maintain repeatability (i.e. use of standard parts libraries)

Commands: absolute/relative/polar coordinates; features eg linetypes, grids, snaps, circle, text, hatching, dimensioning, layers/levels, colour; viewing eg zoom, pan; inserting other drawings eg symbols, blocks; modifying eg copy, rotate, move, erase, scale, chamfer, fillet



HOW WILL THE ASSIGNMENT BE ASSESSEDYour report should be presented in an appropriate format in order that it can be read by both your assessor and any others, who may wish to read your work,

• The assignment should be either word processed or written neatly on A4 paper

• The front cover sheet attached to this brief must be included with the following information, student name, date, unit and assessment number.

• Correct use of spelling and grammar.

• Clear and legible writing or font/font size.

• Clear indication of the tasks being completed.

• Appropriate text and web based sources should be used to research your assignment.

Your work must be your own. Any websites or books used to obtain information must be referenced in a bibliography at the end of your assignment.

It is important that your assignment is handed in on or before the ‘hand in date’ stated on the front cover sheet. Late assignments will only be assessed if the reasons for the lateness have been discussed with both yourself and the assessor. Any work handed in after the hand in date without prior agreement with the assessor will not be assessed.


olsjdt.files.wordpress.com€¦ · web viewexplain how these commands can impact upon engineering...

Documents