BS EN ISO 128-3 pdf free download

BS EN ISO 128-3 pdf free download. Technical product documentation – General principles of representation.
3.1 cut sectional view section (3.2) showing, in addition, outlines beyond the cutting plane Note 1 to entry: While “cut” is generally used in the construction field, “section” is generally used in the mechanical engineering field, regardless of the definitions in 3.1 or 3.2. [SOURCE: ISO 10209:2012, 3.11, modified – Note 1 to entry added.] 3.2 section representation showing only the outlines of an object lying in one or more cutting planes Note 1 to entry: While“cut” is generally used in the construction field, “section” is generally used in the mechanical engineering field, regardless of the definitions in 3.1 or 3.2. [SOURCE: ISO 10209:2012, 3.61, modified一Note 1 to entry added] 3.3 technical drawing drawing showing a technical installation, process or product with a view to clarifying its structure and enabling its construction Note 1 to entry: For the purpose of this document, the term“technical drawing” is interpreted in the broadest possible sense, encompassing the total package of documentation specifying the product (work piece, subassembly, assembly). [SOURCE: ISO 5127:2017, 3.4.7.54, modified一Note 1 to entry added.]4 Basic conventions for views 4.1 General information on views The most informative view of an object shall be used as the principle view, taking into consideration, for example, its functioning position, position of manufacturing or mounting. Each view, with the exception of the front or principal figure (view, plan, principal figure), shall be given clear identification with a capital letter, repeated near the reference arrow needed to indicate the direction of viewing for the relevant view. Whatever the direction of viewing, the capital letter shall always be positioned in normal relation to the direction of reading and be indicated either above or on the right side of the reference arrow. The reference arrow is defined in Annex A (for the former practice of arc arrow, see Annex B), as is the lettering height of the identification. The designated views may be located irrespective of the principal figure. The capital letters identifying the referenced views shall be placed immediately above the relevant views (see Figure 1). 4.11 Other projection methods Refer to ISO 5456-2 for information on other projection methods such as mirrored orthographic projections. 4.12 Enlarged features When the scale of a technical drawing does not allow all features to be clearly shown or dimensioned, the unclear features shall be enclosed or encircled by a continuous narrow line [type 01.1), with the area thus enclosed identified by a capital letter. The features in the area shall also be shown on an enlarged scale, in a view that is broken with a continuous narrow freehand/free formed curve line (type 01.1). This shall be accompanied by the identification letter and an indication of the scale beside it between parentheses, as shown in Figure 8. The rules for lettering height are discussed in Annex A. The position of the cutting plane(s) shall be indicated by means of a cutting line represented with a dashed dotted wide line (type 10.2) according to ISO 128-2:- -, Annex E and Annex G. A straight cutting plane shall be drawn (see Figure 12]. If the cutting plane changes its direction, the cutting line should only be drawn at the ends of the cutting plane, where the cutting plane changes direction (see Figure 13). If necessary for its legibility, the cutting line may be connected with a long dashed dotted narrow line of the type 04.1 according to ISO 128-2:- -, Annex D or 04.1 according to ISO 128-2:- , Annex F). The direction of viewing for the relevant cut and section is indicated by the reference arrows as defined in Annex A. The designated cut and section can be located irrespective of the view in which the cutting plane is taken.BS EN ISO 128-3 pdf download.