Standard No.:	QJ 978A-2005
English Name:	Simplified Method for Assembling Drawing of Aerospace Electronic Products
Chinese Name:	航天电子产品装配图简化画法
Chinese Classification:	V19
Professional Classification:	QJ    Professional Standard - Aerospace
ICS Classification:	01.100.25 01.100.25    Electrical and electronics engineering drawings 01.100.25
Issued on:	2005-12-12
Implemented on:	2006-5-1
Status:	valid
Superseding:	QJ 978-1986
Target Language:	English
File Format:	PDF
Word Count:	19000 words
Translation Price(USD):	570.0
Delivery:	via email in 1 business day

Simplified method for assembling drawing of aerospace electronic products 1 Scope This standard specifies the simplification principle of assembling drawing of aerospace electronic products as well as the simplified drawing of structural elements, assembly relationship, standard products, general products and purchased components. This standard is applicable to simplified method for assembling drawing of aerospace electronic products. 2 Principle of simplification 2.1 When drawing the assembling drawing in a simplified way, it shall be ensured that the assembly relationship and installation position of products are clear and accurate, with the features prominent, the image easy to understand, the drawing simple and convenient for use. 2.2 The simplification of assembling drawing mainly depends on the simplification of each component of the assembling drawing, and the figure of the simplified part shall be drawn according to the proportional relationship of the whole assembly drawing. 2.3 Unnecessary views and repeated projections may be omitted under the condition of clearly expressing product features and ensuring reasonable organization of production; simplified outline may be used instead of drawing a complete view of the product. If it is unnecessary to reflect the size, shape and connecting part of the real object, the unified schematic diagram or graphic symbol may be used for expression. 2.4 Several types (pieces, kinds and groups) of the same structural elements, when concentrated on one projection drawing, may be simplified if they can be clearly distinguished without misunderstanding. 2.5 The parts that have been clearly indicated in one assembling drawing may be simplified or omitted if they appear in another assembling drawing, but the parts that still need to be processed shall be clearly indicated. 2.6 On the premise of meeting the requirements of production and use, in order to simplify the drawing of assembling drawings, it is allowed to draw the relevant charts separately and explain them in necessary words. 3 Simplification of structural elements in assembling drawings 3.1 When several identical structural elements or parts (such as various holes, louvers, teeth, slots, welding lugs and binding posts) are distributed regularly on one projection drawing, only a few representative structural figures (such as the first and the last or the outermost one) may be drawn as shown in Figures 1 and 2, and the rest may be connected with thin solid lines or only be shown by their central positions.

Foreword i 1 Scope 2 Principle of simplification 3 Simplification of structural elements in assembling drawings 4 Simplification of assembly relationship 5 Simplification of standard products, general products and purchased components 6 Simplification of integrated circuits with simple assembly relationship in assembling drawings 7 Simplification of item list of assembling drawing 8 Simplification of tabular assembling drawing 9 Simplification of assembling drawing of printed board assembly 10 Simplification of assembling drawings of panel, back panel and side panel 11 Simplification of assembling drawings of cabinet and plug-in box 12 Simplification of cable assembling drawing 13 Simplification of assembling drawings of packing boxes used for packing and storing products Annex A (Normative) Simplified outline graphics Annex B (Informative) Simplified assembly drawing examples