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Measurement, Sketching and Technical Drawing

Introduction to Technical drawing, Sketching and Measurement Techniques.

This session is designed to introduce students to basic technical drawing, sketching and measurement techniques. The skills each student should acquire during this session are a foundation for future courses in later years, it is very important to ensure students have a clear understanding of the basics regarding this topic. To attempt to build on skills and knowledge which are not `solid' and well known will with out a doubt cause many problems in the coming semester and years. Students are required to provide several basic drawing implements described in detail below. Students who don't have access and/or are unable to acquire this equipment are asked to see the supervisor beforehand. There are several tasks involved in this session each building on the previous one. Students are assessed on the work they submit. Assessment is based on quality, completion, understanding and effort. While each student's work varies in neatness and is not usually an issue in most courses, students are advised that neatness and clarity are important aspects in sketching and technical drawing, these aspects will be considered when assessment is given. Since there is two groups participating in this session one group will complete task 1 and 2 while the other group will complete tasks 3 and 4 first, on completion, the two groups will exchange tasks and equipment. Time available for each task: 0.5 hr Introduction and demonstration 1 hr Measurement 1 hr Sketching and Technical Drawing 0.5 Technical Drawing Interpretations Equipment required (by students): Drawing pencils (1x soft + 1x hard) Eraser Set squares Ruler Drawing Pad (A4) Tools Provided (by department): Calipers (inside, outside, vernier) Height gauge Bore gauges Depth gauges Stards Materials provided:

Measurement, Sketching and Technical Drawing AERO1600 Workshop Technology

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Measurement, Sketching and Technical Drawing

Procedure Please ensure you have a copy of the Measurement, Sketching and Technical drawing handout. The first ½ hour of this session is an introduction into the use measuring tools and the basics of generating a sketch and /or technical drawing. This session is not devoted to teaching students every aspect of technical drawing but rather provide the basics required for this course and for later Technical drawing courses done in 2nd year. The measuring skills are very important due to that fact that you will be expected to know these methods in future courses, please ensure you fully understand the operation of the measurement tools. Note: we will be working in both metric and imperial measurements, since both are commonly used in the aircraft industry. Some of the equipment that we will be using is metric only, if this is the case is please convert all measurements.(see handout for conversion factors). The supervisors will start by demonstrating the operation and use of all the measuring equipment. Students will be provided with example sketches technical drawings along with a template on which they are to follow for the technical drawings. There is also a short handout on the types of sketches and technical drawing along with some advice on how to get started with your drawings.

Measurement

(Task 1)

Measurement is an important aspect of engineering, the ability to correctly and accurately measure components will become second nature during the coming years. This task will require students to make 25 measurements using at least three different measuring tools. Located in the main student workshop will be several components from aircraft or machinery, these are the components students are required to take their 25 measurements from. Students can take measurements from all the parts or just one, as long as there is 25 different measurements (ie diameters, thickness, spacing, bore, length, depth etc). All measurements made must be accompanied with a short description of the part where the measurement was taken, please fill out the included sheet for this task. Students are encouraged to use all the available measuring tools to gain an understanding of the possible methods available to engineers. Please refer to the handout if you are unsure on how to use a particular instrument, if you are still unsure please approach the

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Measurement, Sketching and Technical Drawing

supervisor, DO NOT use these instruments unless you know what you are doing. The instruments are very expensive and delicate. . Students are then required to submit the completed drawing. Assessment is based on the accuracy of the readings. Note: Working in a group is acceptable, however ensure you do your own work. Copying will not be tolerated in this course or any other for that matter.

Sketching (Task 2)

Students will be required to make a freehand pencil sketch of the provided part. This sketch is to contain an isometric view. There are approx 20 parts students can choose from to make their sketch, these parts are not overly complicated.The format is as follows:

Isometric View

Details

(A4 Size, Landscape) For a complete template refer to the handout examples Assessment for this task is based on clarity, realism and neatness. It is very important to be able to sketch components clearly so that colleagues can interpret and analyse the sketch. With the development of CAD packages the need to be able to sketch is becoming less of qualification, nonetheless all designs which end up in a CAD package begin with a simple (or for that matter complex) sketch.

Measurement, Sketching and Technical Drawing AERO1600 Workshop Technology

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Technical Drawing

(Task 3)

Now that students are familiar with the part from the previous task, students are require to generate a full technical drawing of the part, including full dimensions, students can choose to use metric or imperial when conducting measurements. Using the example handouts students are required to produce a professional drawing of the part that could be presented to an employer or colleague. With the skills learnt during task one students can accurately measure and define the part before completing the drawing. Students will be assessed on the accuracy of the drawing, clarity and completion.

This sketch is to contain an isometric, front, top and side views. The format is as follows:

Front view Isometric View

Top View

Side View

Details

(A4 Size, Landscape)

Technical Drawing Interpretation (Task 4)

For this task students are provided with a Technical Drawing of a mechanism or component. Students are required to analyse and interpret the drawing. Students must then write a short report on what they believe the part to be, there will be a number of different technical drawings taken from the Jabiru SP aircraft. The short report should include the following aspects (the report is to be no longer then ¾ of a page): a. What is the mechanism/part. b. How is it assembled.

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Measurement, Sketching and Technical Drawing

c. How does it work. d. Why was it designed like it was. e. Are there any other possible designs

Engineers are required to read and interpret drawings every day, how each person can interpret a drawing can often be different. All drawings should clearly convey the purpose of the part, how it can be installed/assembled, what it is and what materials are used. Students need to develop these skills to be able to correctly interpret drawings to be able utilize them

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