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Exam 2 Notes

Exam 2 Notes - ENGR 111 A Exam 2(Graphics Linear...

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ENGR 111 A – Exam 2 (Graphics) Linear Engineering Design Process Steps 1. Problem Definition 2. Exploration of Ideas 3. Design 4. Analysis 5. Refinement and Optimization 6. Implementation All steps of the Linear Engineering Design Process involve the use of technical graphics. Importance of Engineering Graphics Communicating Technical Information Quickly and Accurately Visualizing Objects Solving Problems Conducting Analysis Standards and Conventions Standard -Formal document that institutes a uniform method to perform an action or defines a criterion for a product. Standards are defined by organizations such as ANSI (American National Standards Institute) responsible for regulating many engineering standards used in the US. Convention -Methods and criteria used so extensively that they become dominant and generally accepted and adopted by the public. They are also known as “industry standards” or “de facto standards”. There are no organizations or formal documents that define conventions. These conventions can differ between industries or even firms within the same industry. In the United States, the Y series of the ANSI standards regulate engineering drawings Lettering The style of engineering lettering we will use in this course is Single Stroke Gothic Lettering. Each letter should be 1/8” in height. Numerals Numerals should also be 1/8” in height.
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Fractions should be twice normal letter height, but each numeral (numerator and denominator) should be shorter than 1/8” to allow space for the vinculum (horizontal line which separates the numerals). Engineering Sketching Engineering sketches are black and white line drawings with notations expressing design intent. They should always be signed and dated to verify ownership. First and foremost, sketching is a form of COMMUNICATION . Technical Drawings COMMUNICATE technical information, capturing details necessary for production or modification. Medium grade pencils work best for sketching. Pure sketching does not require the use of any drawing instruments. Sketching should be the first step of any design. Sketching Techniques -Use very light construction lines. -“Box in” the rough outline of the object. -Darken only the lines you wish to keep. -Clean up the edges and rough spots. *** Go to Chapter 2 in the graphics textbook for more sketching techniques*** Uses of Sketching -Some sketching is to illustrate definite concepts. -Some sketching is done as an aid to clearer thinking. -Some sketching is done to illustrate actual objects. Line Type Weights -Visible (0.5 mm) -Hidden (0.25 mm) -Center (0.25 mm) Albrecht Dürer (1471-1528) German artist known for engravings. Authored, “The Four Books on Human Proportions” which used orthogonal multiview
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Exam 2 Notes - ENGR 111 A Exam 2(Graphics Linear...

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