Extracting Information

Sources of information Before starting any Assembly activity you will need to collect all sources of relevant information. These could be: Relevant up to date drawings Manuals/procedures/tables/charts Technical specifications Component settings

Drawings (BS8888 2006) Often contained in the workshop manuals, Manufacturers web sites and the Drawing Office There are many different types of drawings available all with their own particular Importance In order to maintain consistency in engineering, a system of standardisation has been Adopted – The British standards institute (BSI) International Organisation for standardisation (ISO) Often contained in the workshop manuals, Manufacturers web site and the Drawing Office

Component drawings These are working diagrams of individual components and are usually orthographic drawings in either first or third angle projection Pictorial drawings are also used and can be either Isometric or Oblique. Component drawings may include - sizes tolerances, material type, weight and part number

Orthographic In simple terms, orthographic drawings are views (front, side, top, and so on) of an object. An orthographic view is only one side. It takes several views to show all the object. They are used for individual components included on the drawing will be: Dimensions- lengths, widths , heights, thread types, Hole sizes etc Tolerances Material Type View Drawing number Title/part number Views Plan or top Front End / side Auxiliary - a view taken from an angle that is not one of the primary views

Views There are two ways of drawing in orthographic - First Angle and Third Angle. First angle projection is the ISO standard and is primarily used in Europe. The 3D object is projected into 2D "paper" space as if you were looking at an X-ray of the object: the top view is under the front view, the right view is at the left of the front view. Third angle projection is primarily used in the United States and Canada, where it is the default projection system according to BS 8888:2006, the left view is placed on the left and the top view on the top.

Pictorial drawings Pictorial drawings show several sides at the same time.  Many people find pictorial drawings easier to understand.  They do not provide as much information as orthographic views. Pictorial drawings are also used and can be either Isometric or Oblique. Component drawings may include - sizes tolerances, material type, weight and part number

Section Drawings Many objects have complicated interior details which cannot be clearly shown by means of front, top, side, or pictorial views. Section views enable the engineer to show the interior detail in such cases. Features of section drawings are cutting-plane symbols, which show where imaginary cutting planes are passed to produce the sections, and section-lining (sometimes called cross-hatching), which appears in the section view on all portions that have been in contact with the cutting plane.

Assembly and Sub Assembly drawings The assembly /sub-assembly drawings are drawings showing in some detail how the component items fit together.  Exploded view is a representative picture or diagram that shows the components of an object slightly separated by distance Exploded diagrams are common in descriptive manuals showing parts placement, or parts contained in an assembly or sub-assembly. Usually such diagrams have the part identification number and a label indicating which part fills the particular position in the diagram.

Layout Drawings A set of working drawings which usually includes detail drawings of all parts and assembly drawing of the complete unit

Other Sources of Information

Procedures Are a sequence of tasks, steps, decisions, calculations and processes, that when undertaken in the sequence laid down produces the described result, Workshop manuals may include Procedures for Assembly, Strip down Installation etc

Technical Specifications the term specification is used in connection with a data sheet (or spec sheet). A data sheet is usually used for technical communication to describe technical characteristics (weights, dimensions, power etc) of an item or product. It can be published by a manufacturer to help people choose products or to help use the products.

Component Settings