TABLE OF CONTENTS In the previous chapter, a comparison was made between engineering drawing and the rules of sentence construction and grammar of a written language. Chapter 2 was concerned with the definition of the artefact shape and form and the ISO rules which define how a 3D artefact is to be drawn on a 2D drawing sheet. In this chapter, information is given on how to specify the manufacturing requirements. It covers such things as size, shape, dimensions, tolerances, surface finish and assembly specifications.
A common artefact in any workshop is a small vice. Such a small engineering vice is shown in Figure 3.1. The main body of the vice is a stubby U shape in which a movable jaw is positioned between the two uprights. The movable jaw is actuated by a screw which is rotated by a small bar. Although the drawing is busy , the different lines help to make the artefact jump out from the page. This has been done by the use of different types of line thicknesses (thick and thin) and different types of line styles (continuous, discontinuous, dash, chain dotted). This is an assembly drawing and is not meant to provide any manufacturing details. The individual components making up the vice are numbered using a balloon reference system, i.e., small circles with the part numbers in them. The assembly drawing is of little use on its own because it needs a list to identify each individual...
