Simplification and Conventions on Assembly Drawing

It is allowed not to show on an assembly drawing:

А) chamfers, fillets, grooves, collars, cuts and other small elements;

B) clearances between a bar and an opening;

C) covers, fly-wheels, handles, hoods, if it is necessary to show the parts of an article closed by them. Thus the proper record, for example, «Fly-wheel ref.6 is not shown» is done above the depiction;

D) visible component parts of articles or their elements, are located behind a spring.

Part Number

All component parts of an article are numbered in accordance with the part number (item number, reference character), indicated in the parts list of this assembly unit. The part number is pointed out on those representations on which a part is designed as visible, giving advantage to basic views or to sectional views.

The part number is marked on the shelves of lines of foot-notes which are drawn by thin lines. The part number is put on a drawing once as a rule and is placed parallell to the title block.

Parts List

A parts list is a document, which determines the composition of an assembly unit, complex or an assembly, necessary for making designer documents (fig.7.2).

A parts list is done on separate sheets A4.

In general case a parts list consists of the followings sections:

1.Documents. 2.Complexes. 3.Assembly units. 4.Parts. 5.Standard articles. 6.Other products. 7.Materials. 8.Assemblies.

The presence of those or other sections is determined by the composition of an article. The name of every section is pointed out as a title in the column «Name» and it is underlined.

The section «Documents» consists of documents which make the basic complete set of designer documents.

The section «Assembly units» consists of assembly units which directly belong to a part construction.

Non-standard parts are put down in the section «Parts» which are included in an article. They are put down according to the increasing of part numbers.

The section «Standard articles» consists of standard articles (bolts, studs, nuts), made in accordance with State Standards.

The section «Materials» consists of materials which are directly included in an article.

The vertical columns of parts list are filled in that way:

– The column «Format» contains denotations of format where the drawing of a part is done;

– The column «Area» is filled in only for drawings, divided into areas;

– The column «Part Number» points the numbers of parts in the sequence of recording them to the parts list. For sections «Documentation» and «Assemblies» this column is not filled in;

– The column «Denotations» consists of denotations of designer documents on all documents and articles, put down to the parts list;

– Additional information, which belong to articles, documents, materials, brought to the parts list is indicated in the column «Note».