Manual of Engineering Drawing
Technical Product Specification and Documentation to British and International Standards
Colin H. Simmons, Dennis E. Maguire
- 336 pages
- English
- ePUB (mobile friendly)
- Available on iOS & Android
Manual of Engineering Drawing
Technical Product Specification and Documentation to British and International Standards
Colin H. Simmons, Dennis E. Maguire
About This Book
The Manual of Engineering Drawing has long been the recognised as a guide for practicing and student engineers to producing engineering drawings and annotated 3D models that comply with the latest British and ISO Standards of Technical Product Specifications and Documentation.This new edition has been updated to include the requirements of BS8888 2008 and the relevant ISO Standards, and is ideal for International readership; it includes a guide to the fundamental differences between the ISO and ASME Standards relating to Technical Product Specification and Documentation. Equally applicable to CAD and manual drawing it includes the latest development in 3D annotation and the specification of surface texture. The Duality Principle is introduced as this important concept is still very relevant in the new world of 3D Technical Product Specification.Written by members of BSI and ISO committees and a former college lecturer, the Manual of Engineering Drawing combines up to the minute technical information with clear, readable explanations and numerous diagrams and traditional geometrical construction techniques rarely taught in schools and colleges. This approach makes this manual an ideal companion for students studying vocational courses in Technical Product Specification, undergraduates studying engineering or product design and any budding engineer beginning a career in design.The comprehensive scope of this new edition encompasses topics such as orthographic and pictorial projections, dimensional, geometrical and surface tolerancing, 3D annotation and the duality principle, along with numerous examples of electrical and hydraulic diagrams with symbols and applications of cams, bearings, welding and adhesives.
- The definitive guide to draughting to the latest ISO and ASME standards
- An essential reference for engineers, and students, involved in design engineering and product design
- Written by two ISO committee members and practising engineers
Frequently asked questions
Information
Chapter 1. Drawing office management and organization
- Conception
- Design and analysis
- Manufacture
- Verification
- In-service (maintenance)
- Disposal.
- Sizes of drawings and tracings, and widths of tracing cloth and paper
- Position of drawing number, date and name
- Indication of scale
- Method of projection
- Types of line and writing
- Colour of lines
- Dimension figures
- Relative importance of dimensions
- Indication of materials on drawings
- Various degrees of finish
- Screw threads
- Flats and squares
- Tapers
- Abbreviations for drawings.
- Method of projection
- Types of line
- Views and sections
- Screw threads
- Tapers.
- The drawing shows the dimensions for the component in three planes. Dimensions of the manufactured component need to be verified because some variation of size in each of the three planes (length, breadth, and thickness) will be unavoidable. The designer's contribution is to provide a Characteristics Specification, which in current jargon is defined as the âDesign Intent Measurandâ.
- The metrologist produces a âCharacteristics Evaluationâ which is simply the Measured Value.
- the types of lines used must be of uniform thickness and density;
- eliminate fancy printing, shading and associated artistry;
- include on the drawing only the information which is required to ensure accurate clear communication;
- use only standard symbols and where no other method of specification exist, appropriate abbreviations;
- ensure that the drawing is correctly dimensioned (adequately but not over-dimensioned) with no unnecessary details.
- Company communications Most companies have their own systems which have been developed over a period of time for the following:
- internal paperwork;
- numbering of drawings and contracts;
- coding of parts and assemblies;
- production planning for component manufacture;
- quality control and inspection;
- updating, modification, and reissuing of drawings.
- Company standards Many drawing offices use their own standard methods which arise from satisfactory past experience of a particular product or process. Also, particular styles may be retained for easy identification, e.g., certain prestige cars can be recognized easily since some individual details, in principle, are common to all models.
- Standards for dimensioning Interchangeability and quality are controlled by the application of practical limits, fits and geometrical tolerances.
- Material standards Physical and chemical properties and non-destructive testing methods must be borne in mind. Note must also be taken of preferred sizes, stock sizes, and availability of rod, bar, tube, plate, sheet, nuts, bolts, rivets, etc., and other bought-out items.
- Draughting standards and codes of practice Drawings must conform to accepted standards, but components are sometimes required which in addition must conform to certain local requirements or specific regulations, for example relating to safety when operating in certain environments or conditions. Assemblies may be required to be flameproof, gastight, waterproof, or resistant to corrosive attack, and detailed specifications from the user may be applicable.
- Standard parts are sometimes manufactured in quantity by a company, and are used in several different assemblies. The use of standard parts reduces an unnecessary variety of materials and basically similar components.
- Standards for costs The draughtsman is often required to compare costs where different methods of manufacture are available. A component could possibly be made by forging, by casting, or by fabricating and welding, and a decision as to which method to use must be made. The draughtsman must obviously be well aware of the manufacturing facilities and capacity offered by his own company, the costs involved when different techniques of production are employed, and also an idea of the likely costs when work is sub-contracted to specialist manufacturers, since this alternative often proves an economic proposition.
- Data sheets Tables of sizes, performance graphs, and conversion charts are of considerable assistance to the design draughtsman.
- Engineering The engineering departments are engaged in:
- current production;
- development;
- research;
- manufacturing techniques, which may include a study of metallurgy, heat-treatment, strength of materials and manufacturing processes;
- advanced project planning;
- field testing of products.
- Sales This department covers all aspects of marketing existing products and market research for future products. The drawing office may receive work in connection with: (a) general arrangement and outline drawings for prospective customers; (b) illustrations, charts and graphs for technical publications; (c) modifications to production units to suit customersâ particular requirements; (d) application and installation diagrams; (e) feasibility investigations.
- Service The service department provides a reliable, prompt and efficient after-sales service to the customer. The drawing office receives work associated with (a) maintenance tools and equipment; (b) service kits for overhauls; (c) modifications to production parts resulting from field experience; (d) service manuals.
- Manufacturing units Briefly, these cover all departments invo...