Curtin University Department of Mechanical Engineering ENGINEERING GRAPHICS ENGINEERING DRAWING PROJECT (AutoCAD Drawings) VALUE: 45% DUE DATE: PART- A IS DUE ON 26 MAY 2017 ( 4 PM ) AT THE ASSIGNMENTS OFFICE, LEVEL 2, BUILDING 204 PART - B WILL BE COMPLETED IN THE LAB IN WEEK 12 DURING YOUR REGISTERED LAB SESSION. This project consists of two parts (A & B).  PART A: Home work (15 %)  PART B: In-class assessment (30 %).P a g e | 2 NOTE:  Late assignments will not be accepted.  There is NO provision for submitting manual drawings for this assignment.  The lecturers and lab tutors are not allowed to comment on an assessment before it has actually been submitted for assessment.  This is an individual, not a group assignment. This is to be done on your own. Do not discuss it with other students. Protect your work:  Plagiarism is a serious offence. Curtin imposes severe penalties, including expulsion from the university.  Do not allow others access your AutoCAD file(s).  You must not share your drawings, including the layouts/title blocks, with other student(s).P a g e | 3 BACKGROUND The primary objective of the project is to enhance your skills in creating working drawings of a product. A product consists of a number of components assembled together. The manufacturing of a product requires shape and size description of the parts of the product, quantity of each component, and assembly / arrangement drawings. There are some parts, such as nuts, bolts and washers that are used in conjunction with the dedicated components (designed for a particular product). Such components are called standard parts and are commercially available. A product’s technical documentation includes detail drawings of individual components, specifications for standard parts, and assembly drawings. Detail drawings provide complete information required for manufacturing of individual parts, whereas assembly drawings contain the following information: - Assembly / arrangement description - Part name, code, quantity and drawing reference of individual components - Specifications for standard parts This project gives you complete freedom in terms of selecting the necessary views and the drawing scale to describe the given product and its components. You may find the product and its component less complex when compared to the ones that you described in the previous assignments. However, the project would provide you enough space to demonstrate your ability to apply the principles and standards that govern the interpretation of engineering drawings. It is strongly recommended that you should conduct a thorough analysis of the given product before start creating drawings. Following aspects would be helpful in brainstorming the ideas and concepts: - Do you need more than one view? How many? - What are the views that best describe the object? - Determine which parts should be represented as sectional views on your drawings - type of sectioning! - Do you need to enlarge any of the drawings or reducing the drawing is more appropriate? Select an appropriate standard drawing scale. - What sheet size would be appropriate? Consider the parameters, such as object dimensions, scale, number of views, and margins etc. The drawing sheet size is determined based on the amount of information you plan to provide.P a g e | 4 INSTRUCTIONS AND REQUIREMENTS 1. Prepare a complete set of working drawings: - Create dimensioned detail drawings of the specified non-standard components (one drawing per sheet). - Create an orthographic general assembly drawing with parts list on one sheet. 2. When preparing the assembly drawing, use separate balloons and numbers for each part in each view or use only one balloon in the view that most clearly identifies the part. It is also essential to distinguish between parts when applying section lines (hatching) to the components. 3. When preparing detail drawings, identify every drawing by listing the part name and number. This must be consistent with parts list on assembly drawing. 4. Create all drawings in THIRD-ANGLE PROJECTION system*. FAILURE TO COMPLY WITH THE GIVEN PROJECTION SYSTEM WILL ATTRACT ZERO MARK. 5. Drawing elements, including the sheet layout and title block, shall conform to the specifications given in the lecture notes or Australian drawing standards. 6. Drawings of standard parts are not required. However, complete specifications for such components must be provided in the parts list. 7. Drawings should be created on AutoCAD and need to be complete in all aspects, including dimensioning. Incorrect / incomplete dimensioning will not be accepted. 8. Where necessary, views should be labelled appropriately. 9. Centre your drawings in the drawing area. 10.Leave a space of about 50 mm between views. Also, leave a reasonable space between the views and borders. 11.The drawing elements, such as object features, dimensioning elements, title blocks, labels, scale and notes must be legible on all drawings. 12.A half-page executive summary reflecting the project objective, methodology and learning outcome needs to be included. 13.Provide explanations and assumptions, if any, on a separate sheet. 14.The report shall also include a title page (displaying your name & ID, assignment title, unit name etc.) and a table of contents. 15.No hand-written pages. Avoid printing on both sides of a paper. * It is recommended by AS1100.101 that only the third angle method of orthogonal projection be used.P a g e | 5 PLOTTING / PRINTING  Single side printing only.  Black and white printing only. NO COLOUR PRINTING.  The lines, characters and symbols shall be legible on the drawings. Selecting light colours for AutoCAD layers may result in a faded output when printed in black & white.  Check LTSCALE and PSLTSCALE settings if the hidden lines / centre lines don’t display properly.  The drawings created using the student version of AutoCAD may contain Autodesk’s Educational Version Banner/Stamp. It is not an issue.P a g e | 6 REPORT REQUIREMENTS Your report shall meet the following requirements: 1. Curtin’s official ASSIGNMENT COVER SHEET (A4 page portrait style). Download it from https://esc.curtin.edu.au/Applications/assignments/. Contact the assignments office if the link doesn’t work. 2. Assessment and Feedback Specification (A4 portrait). Download this from Blackboard. 3. A title page – displaying your name & ID, assignment title, unit name etc. (A4 page portrait style). 4. Executive summary (max 300 words on a separate A4 sheet portrait style). It’ll include project objectives, methodology and learning outcomes. 5. Table of contents (on a separate A4 sheet – portrait style). 6. Assumptions / explanations, if any, on a separate A4 page (portrait style). 7. Printed copies of all AutoCAD drawings. 8. All pages of the report should be placed in HORIZONTAL-READ position and stapled in the UPPER-LEFT corner. Fold A3 sheets to A4 after you have stapled all the sheets together. Refer to the document titled “How to bind your report” on Blackboard. 9. The report shall be organised in the following order: - Cover sheet. - Assessment and Feedback Specification, - Title page. - Executive summary. - Table of contents. - Assumptions / explanations, if any. - Assembly drawing. - Detail drawings in order (Part 1, Part 2, …..). DO NOT USE FOLDERS OR PLASTIC SLEEVES. The report shall contain no handwritten pages.P a g e | 7 MARKING  A drawing will be given no marks if it contains any of the following: - Incorrect projection system - Incorrect line types - Non-standard scale - Incorrect/incomplete dimensions - Too many errors - Badly cluttered drawing  More than 60% marks will only be given if the project report addresses all of the requirements, and it is presented professionally.  The drawings that demonstrate correct application of a wide range of drawing elements/techniques will be rewarded accordingly. PART – B  Part B will require creating drawings of two objects. This may include assembly drawings, sectional and auxiliary views.  It requires submitting DWG and PDF files of your drawings. The submitted files shall NOT contain any construction lines or viewport boundary. The PDFs shall be in BLACK and WHITE.  The drawing requirements, as outlined in this document, are applicable to both parts (A and B) of the project.  You will not be allowed to access Internet, your OASIS account, Blackbaord or any information on the “I” drive of the PCs in the lab.  Laptops will not be allowed in the lab.  The following material will be allowed in the lab: Lecture notes, drawing standards, GLAs, AutoCAD templates/master files, title blocks / layouts etc. This material can be on a flash drive or in print format.  It will be helpful if you bring A4, A3 and A2 drawing templates with you. Check that your templates are compatible with the version of the AutoCAD installed on lab PCs.  A sample tile page for part-B is available on Blackboard. NOTE: You must be able to create PDFs of the drawings as submitting .DWG and .PDF files is an essential requirement for Part B.P a g e | 8 PROJECT RESULTS The project results will be available when you receive the official notification of your final results. LATE ASSESSMENT POLICY By default, a late assessment will attract ZERO mark. Under special circumstances, such as medical emergency or bereavement, students may apply with supporting evidence for a waiver of this default late penalty. The request for an extension will be reviewed for approval by the unit coordinator or Head of Department. Such applications are to be lodged BEFORE the original assessment due date using the assessment extension request form. A request submitted without the extension request form will not be considered.P a g e | 9 SHAFT SUPPORT ASSEMBLY Figure 1 shows a SHAFT SUPPORT ASSEMBLY, which is made of several parts, including standard components. The specifications for all parts are given in Table 1: Table 1: Components of shaft support assembly PART NO NAME MATERIAL DETAIL DRAWING REQUIRED 1 BASE 1020 STEEL YES 2 FORK 1020 STEEL YES 3 POST 1020 STEEL NO* 4 SLEEVE 1020 STEEL NO* 5 BUSHING BRASS NO* 6 SET SCREW SLOTTED HEAD CONICAL POINT M10 X 1.5 STEEL YES 7 REGULAR HEX NUT M10 X 1.5 STEEL NO# 8 HEX SOCKET HEAD SET SCREW M9 X 1.25 LENGTH 9 STEEL NO# 9 HEX SOCKET HEAD SET SCREW M7 X 1 LENGHT 9 STEEL NO# * For the assignment, the drawing of this component is not required. In practice, drawings of all dedicated components are created. # The components 7, 8 and 9 are standard components.P a g e | 10 Create the following drawings:  A general assembly drawing (orthographic views) – a sectional view is required. Draw as many views as necessary to describe the product. The assembly drawing must show all the nine components assembled.  Detail drawings of the specified dedicated components (refer to Table 1). Where necessary, provide sectional views. o The detail drawing of part # 1 (BASE) must include a HALF SECTIONAL view. Standard components:  Refer to the lecture notes to work out the dimensions of standard parts. Your best judgment will be acceptable if correct size of a standard part is not available.  The representation of standard parts will be acceptable if they appear to be similar to the ones shown in Figure 1. However, correct representation of screw threads is essential. NOTE:  All representations, including the screw threads, shall conform to Australian drawing standards.  Some of the figures may require missing information to be developed. If dimensions are missing, determine what they should be by their relationship to other parts.  If required, the given sizes can also be modified.  All changes / modifications must be stated on a separate A4 page attached to the report.P a g e | 11 FIGURE 1: SHAFT SUPPORT ASSEMBLY FAO – FINISH ALL OVER (Don’t worry about indicating this information on your drawings).P a g e | 12 OPTIONAL # 3  The drawing on the next page is not part of the Engineering Drawing Project.  You can complete and submit it with the project drawings if you want to do it as a substitute to any or all of the 8 to 10 lecture quizzes.  ONLY a General Assembly Drawing is required.P a g e | 13 SHAFT CLAMP Figure 2 shows a SHAFT CLAMP. The components and their specifications are given in Table 2. Table 2: Components of Rocker Tool Post PART NO NAME MATERIAL QTY 1 UPPER SADDLE 1015 STEEL 1 2 LOWER SADDLE 1015 STEEL 1 3 HEX SOCKET HEAD SCREW 1040 STEEL 2 4 HEX JAM NUT M8 X 1.25 1040 STEEL 2 Create the following drawings: A general assembly drawing - orthogonal view(s). The assembly drawing must contain a sectional view. (Remember: The assembly drawing shall show all the components assembled). NOTE:  All representations, including the screw threads, shall conform to Australian drawing standards.  Some of the figures may require missing information to be developed. If dimensions are missing, determine what they should be by their relationship to other parts.P a g e | 14 FIGURE 2: SHAFT CLAMP DESCRIPTION OF ABBREVIATIONS: CHAM: CHAMFER STL: STEEL CBORE: COUNTERBORE