1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards LINE CONVENTIONS Do Not Use on New Programs. Being Replaced by Global Design Standards EDS-A-1011 ISSUED DATE: 1996. 03. 19 REVISED DATE: 2008. 05. 31 VERSION: 4 (Superceded) EDS-A-1011LINE CONVENTIONS PAGE: 1/4 ISSUE
2、D DATE: 1996. 03. 19 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project drawings generated by CATIA. It is Superceded for all future projects and replaced by Global Design Standards. 1. PURPOSE This standard specifies lines u
3、sed in drawings in drafting. 2. SCOPE This standard applies to lines on drawings prepared and used by the GM DAEWOO Auto & Technology Company (hereinafter referred to as the “GMDAT“). 3. TYPE OF LINE 3.1. Classification of lines by discontinuity 3.1.1. Continuous line - Continuous line 3.1.2. Dashed
4、 line Regular repetition of short lines 3.1.3. Chain line - Alternate lines and short dashes 3.1.4. Chain double dashed line - Alternate lines and short dashes in order of line, dash, dash, line, dash, dash. 3.2. Classification of lines by thickness ratio Type of line by thickness ratio Thickness ra
5、tio Thickness (mm) Thin line Thick line Very thick line 1 2 4 0.2 or below 0.2 0.5 0.5 2.0 4. HOW TO USE LINES 4.1. Use of lines by types The main use of lines by types shall conform to Table 1. When using lines not specified in this standard or other designated specifications, their use shall be no
6、ted in drawings. EDS-A-1011LINE CONVENTIONS PAGE: 2/4 ISSUED DATE: 1996. 03. 19 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Table 1 Type Size of line Designation by use Use Indication Visible line - Indicate all visible edges of an object Note 1) Thick line 0.2 0.5 Cutting-plan
7、e line - Designate where an imaginary cutting took place Dimension line - Used to enter dimensions Extension line - Drawn to enter dimensions Leader - Indicate notes or symbols Rotating section line - Indicate cross-section of a cut part by rotating it 90g Plane indication line - Indicate a plane of
8、 an object Break line - Indicate broken boundary of object Water level line - Indicate water or liquid level Hatching - Indicate cutting plane of sectional view Thin line 0.2 max Extension line - Indicate extended portion of outline and hidden line Con- tinu- ous line Very thick line 0.5 2.0 Special
9、 use line - Indicate single line delineation of thin part EDS-A-1011LINE CONVENTIONS PAGE: 3/4 ISSUED DATE: 1996. 03. 19 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Type Size of line Designation by use Use Indication Dashed line Thick & thin line 0.2 0.5 Hidden line - Indicate
10、hidden part of an object Thick line 0.2 0.5 Special designation line - Indicate special working and processing Center line - Indicate the center of a view Trace line - Indicate trace of center Pitch line - Reference line of pitch in repentant shape Cutting line - Indicate cutting position of section
11、 view Specific position line - Indicate part that serves as the basis of positioning Chain line Thin line 0.2 max Datum line - Indicate datum line of object Gravity center line - Indicate center of gravity of section - Indicate adjacent part for reference - Indicate position of tools and jigs for re
12、ference - Indicate shape before or after processing - Indicate repetition Chain double dashed line Thin line 0.2 max Phantom line - Indicate specific position or movement limit EDS-A-1011LINE CONVENTIONS PAGE: 4/4 ISSUED DATE: 1996. 03. 19 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Techn
13、ology 4.2. Priority order of overlapping lines When two or more types of lines overlap in a drawing, the following order of priority shall be observed. 4.2.1. Outline 4.2.2. Hidden line 4.2.3. Cutting line 4.2.4. Center line 4.2.5. Gravity center line 4.2.6. Extension line 5. RELATED STANDARDS EDS-A-1001 General Code of drawing practice KS A 0005 Technical drawing - General code of drawing practice KS A 0109 Technical drawing - Line conversions
