GB/T 4457.2-2003 Basic provisions for drawing guide lines and reference lines for technical drawings

This standard applies to technical product drawings, and other relevant drawings can also be used as a reference. GB/T 4457.2-2003 Basic provisions for drawing guide lines and reference lines for technical drawings GB/T4457.2-2003 standard download decompression password: www.bzxz.net

GX/4457.2—2003/SO128-22:1999 adopts 150125-2.190 in the general practice and the basic provisions of the English version of the reference drawing. In order to facilitate the use, the following abbreviations are made in all parts; 2) "This standard" is changed to this part; 6 volumes except the first part of the international standard:
) In order to be consistent with the existing system standards, the standard name is changed, and the international catalog A and the attached data are required.
This part is issued by the National Technical Product Document Standardization Committee of Shandong Enterprises. The main units in this part are the Mechanical and Lock Science Research Institute, Hefei University, Dalian University, and Lingxi Provincial Standard Design and Construction Research Institute.
The main drafters of this part are Tang Dongfang, Qu Wenwo, Shang Jingwei, Li Xuejing, Zou Qiutang, Ding Tongzi, Hou Weiya, Ying Wan Su Cemei. 1 Scope
GR/T 4457.2-2$3/1S 128-22:1999 Technical product drawing drawing method
Basic provisions for guide lines and reference lines
This substandard specifies the general principles for the expression of technical drawings, guide lines, reference lines and their components in drawing method, as well as the expression method of guide lines in various technical documents. This part is applicable to technical product drawings, and other relevant specifications may also be used accordingly. 2 Normative references
The following references shall apply to the provisions of this part of GB/4457 as they are incorporated by reference in this part: For dated references, all subsequent amendments (excluding those with a date indication) or revisions shall not apply to this part. However, for the purpose of obtaining an agreement based on this part, the latest version of this document shall apply to all undated references.
GB/117450 Technical Drawings (idtIS0128-20) 3 Terms and Definitions
The following terms and definitions shall apply to this part. 3.1
Leader line
A thin solid line that establishes in an unambiguous manner the connection between a graphic element and an accompanying word or textual description: general information, technical requirements, reference, etc.
Baseline Ifne
and the horizontal straight solid line connected with the lead is connected, it is noted above or beside the tree that the rate of guidance reaches
and the type of virtual child heart B, T17450 must always be given to the system, and it must form a certain angle with the object to be expressed. In the drawn structure, it cannot be parallel to the adjacent lines (such as cross-sections), and the angle formed with the corresponding line should be 15: as shown in Figure 13, the
guide line is folded into a sharp single line as shown in 5 ), two guides can have a common starting point (such as 25, as shown in Figure 11), the guide cannot pass through other guides, the base and the terminal of the guide such as the number of graphic scales have the following forms: solid, if the guide line is used to express the order or rotation of the work, the internal receiving parts and the system line, when the line is also invited to the line, you can use a solid lead, the full head can pass through these graphics and their positions (such as the symmetry center end) as shown in Figure 1. If there are several parallel lines, it is allowed to use a material line instead of a flow head, as shown in the rate. - a point, if the end of the guide is in the wheel library of an object, it can be a point, as shown in Figure 11, there is a termination symbol. If the line is not on the line of the month: such as the hole line, the symmetry line, etc. as shown in Figure 17 and Figure 13. GB/T4457.2—2003/ISO 128-22:1999 Figure 1
5 Expression of datum line
. GB/T4457.2—2023/1S0128-22:1999 Figure 12
Depth drawing or continuous drawing, each guide line can be added with a datum line, the datum line should be drawn in the horizontal or vertical direction, the datum line can be called
It has a fixed length, which should be 6, as shown in Figure 15, or the same length as the French light description grid, as shown in Figures 11, 17, 2! and 2. GD... MO2LI-6.]
In special use, the blood drawing of the reference line: as shown in Figure 1, Figure 15
If the music finger is drawn in the direction of the water half or vertical direction, the explanation of the explanation of the note and the direction of the guide line is effective, as shown in Figure 18. GB/T4457.2-2003/I50128-22:1999 In the case of the monthly reference line, the reference line can be omitted as shown in Figure 2. Figure 13, Figure 21, 60.37.5
6 Notes Yue Ming
Figure 19
The explanation of the note associated with the guide line is as follows: above the reference line, as shown in Figure 14, Figure 27. Figure 21 and 22. Figure 20
The note should be written behind the guide line or base line, and the top of the character should be aligned with the guide line or base line, as shown in Figure 1 and Figure 18:
The note should be written beside, inside or behind the corresponding graphic symbol, as shown in Figure 1 and the legend in Appendix A. Considering the requirements of microfilm, if the note is above or below the reference line, it should be written at the maximum width of the reference section. It can be written inside the technical guide line and cannot be avoided. 567-300
60x10109
I24u-B94U
Appendix 4
(Informative Appendix)
G8/T4957.2—2003/15028-22,1999 Instructions for the application of guides and references
A.1 List of instructions for non-standard instruments and reference lines A. Table 1. T (coast)
Marking instructions
Indicates the following characteristics
Indicates the length of the length bzxz.net
(Material density attached)
GA/I44S7.2—2003/ISO 128-221999 Meaning and application of the annotation and additional "surface" on the guide If a part is related to other parts, the surface or rotation rate has special requirements, then only the annotation can be used. The annotation method is to add a surface (8 guide line width) at the contact point between the guide line and the reference line, as shown in Figure E to Figure B.
In this case, do not use "national" etc. The registration number may cause misunderstanding.
Use "display\ symbol involving a part with a surface or corner. 1
Figure 8,3
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