This standard specifies the general structure and content of the "CAD Standard Parts Graphics File" series of standards, data structure and content, characteristic data, comparison table of graphics files and drawing programs, supplementary provisions for graphic symbols in graphics files, and syntax of characteristic files and comparison table files. This standard is applicable to the compilation of the "CAD Standard Parts Graphics File" series of standards and the establishment of CAD parts libraries. GB/T 15049.1-1994 General Principles for the Compilation of CAD Standard Parts Graphics Files GB/T15049.1-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
General Principles for Preparing the Geometry Files of CAD Standard Parts
General Principles for Preparing the Geometry Files of CAD Standard Parts1 Subject Content and Applicable Scope
GB/T 15D49. 7--94
This standard specifies the general structure and content, data structure and content, characteristic data, comparison table of graphic files and drawing programs, supplementary provisions for graphic symbols in graphic files, and syntax of characteristic files and comparison table files, etc. of the series of standards of "CAD Standard Parts Graphic Files" and the establishment of CAD parts library. This standard is applicable to the preparation of the series of standards of "CAD Standard Parts Geometry Files" and the establishment of CAD parts library. 2 Reference standards
GB10091.1 Definition and principle of table of characteristics of objectsGB4457.1 Mechanical drawing
GB4457.2 Mechanical drawing
GB4457.3 Mechanical drawing
GB4457.4 Mechanical drawing
GB 4457.5 Mechanical drawing
GB4458.1 Mechanical drawing
Mechanical drawing
GB 4458. 2
GB 4458.3
Mechanical drawing
GB 4458. 4
Mechanical drawing
GB 4458. 5
Mechanical drawing
Mechanical drawing
GB 4459. 1
GB4459.2 Mechanical drawing
Mechanical drawing
Drawing surface and format
Surface symbol
Drawing method
Assembly drawing part number and its arrangement method Axonometric drawing
Dimension annotation
Dimension tolerance and fit annotation
Drawing method of thread and threaded fastener
Gear method
Drawing method of spline
GB4459.4 Mechanical drawing
Drawing method of spring
GB4459.5 Representation of center hole in mechanical drawing GB/T14665 Rules for computer exchange of information in mechanical drawing GB123 Priority number system and priority number
GB3057 FORTRAN language
Part I CAD General structure and content of standard parts graphic files 1. Processed dimensions and (thief) product standards
List the standard code and number, standard name and main specifications of the processed standard. See Example 1. Example 1: Product standard processed
National Technical Supervision Island 1994-05-05 approved 1994-12-01 implementation
GB5780-86 Hexagon head bolts C grade
GB/T 15049. 1-94
GB5782-86 Hexagon head bolts A and B grades
GB5783--86 Hexagon head bolts full thread A and B grades GB5785-86 Hexagon head bolts fine pitch A and B grades GB578G-86 Hexagon head bolts fine pitch full thread A and B grades GB/T1228+-91 Steel structure high strength large hexagon head screw 2 Characteristics
Determining properties of an object from a group of objects. The characteristic group of standardized objects is expressed through the characteristics of things. The characteristic data describing the different displays of standardized objects are expressed with numerical values ​​and letters. Characteristics include those selected from GB 10091 "Table of Thing Characteristics" and those necessary for generating geometric figures. 2.1 Types of Characteristics Types of Characteristics of Things Types of Characteristics GB 10091 This standard is derived from: the three letters 1, 0, Q are not used. Explanation: Thing characteristics Geometric characteristics, supplementary characteristics, functional characteristics, algorithm characteristics, classification characteristics, attribute characteristics, predefined attributes, attribute characteristics, address of graphic symbols, geometric characteristics, and characteristics used to generate geometric figures.
Characteristic code
AI—19
A01—J09
A11-I99
AAA—AZZ
RAA-BZZ
CAACZZ
DAADZ2
EAA—EZZ
FA1—FZ9
FAA-FZZ
AA—AZ
K1—29
GAAZZZ
BA--ZZ
Supplementary characteristicsCharacteristic value does not appear in the dimension and/or product standard, but is necessary to determine the geometry (the existing initial value is shown in the value table). This characteristic may also be cited from the referenced standard. GB/T15049.1—94
Functional characteristics are characteristics that are not determined until assembly (the existing initial values ​​are shown in the value table), and algorithmic characteristics are characteristics that are calculated by combining the above characteristics with algorithms (characteristic algorithms). Classification characteristics are used to form characteristics composed of different characteristic data. Attribute characteristics are used to explain the characteristics of the representation method and state of characteristic data. Such as defining priority, implicit or color and state characteristics. Dominant characteristics are a subset of the characteristic classification, used to identify standardized objects, and are also characteristics that are necessary for using other standard contents. Dominant characteristics are not shown in Table 1.
2.1.1 Nominal value/characteristic value (also called dominant characteristic) In addition to the characteristics required to generate geometric figures, the above characteristics must also have the necessary characteristics (nominal value/characteristic value) to identify variant figures. The nominal value and characteristic value are shown in the drawing frame marked with the size and (or) product standard code. They are different from the geometric and the characteristics in the GB10091 "Object Characteristics Table" and must be shown with a supplementary characteristic code. See Example 2, only the nominal value (dominant value) indicated by the mark is shown. Example 2: See Figure 1
Quoted from arch spring coil\standard
Carrying A
GB/T15049.1-94
Nominal value
GR10091 semicolon standard arch spring coil display diagram-2
K2A, B, C, AAA)
Characteristics to size and (or) product standard size letter and the whole piece to size and product standard comparison arrangement belongs to the rate of physical characteristics: GB 10091 Arch spring gasket size and characteristics of the standard code
size and)
product standard
arch spring tube
gasket figure A type
figure related standard
nominal K2
thing characteristics
figure number in the table
above characteristics = product standard arch spring gasket nominal value corresponding GB10091 arch spring gasket figure semicolon standard characteristics EAA method: 1) the standard code and number should be listed here. Figure 1 Nominal value of arch spring gasket
2.1.2 Dimensions and (confused) characteristics in product standards GB/F 15049. 1 --94
This characteristic is a necessary characteristic of the selected standard object. The adoption principle is as follows: all the characteristics A~J in the existing GB10091 & thing characteristics table" are adopted without change to the corresponding standards in this series of standards. Characteristics K~ZK1~Z9 and 1~999 are reserved for enterprise expansion. Do not mix the above characteristics with the shape parameters (P1, P2.P3.·) in Section 1.8.2 of Box 2. h. Combination and multiple object characteristics
The corresponding characteristics in the "Table of long object characteristics" in GB10091 can be decomposed into combination and multiple characteristics. The following takes the screw as an example to illustrate its corresponding combination and multiple characteristics. Example 3: See Table 2
Table 2 Combination and multiple processing of object characteristics
Object characteristics table GB191.×
Character code
Object characteristics name
GB10U91.X
Character A Technical change
Character E is changed to 1 and E2.
To meet the needs of geometric display,
further decompose the characteristics A and E2 in the graphic text standard
.
Type dial code
Gland pull type
Thread direct change
Cup true scripture station
Tolerance
Tube outer diameter or end gauge
Tube outer diameter
Honey type dial code
Thread type
Thread diameter
In order to distinguish it from the normal letter code representation when decomposing the combined characteristics (GB 10091 uses A~J, A1~J9),Combined characteristics are added by adding two digits after the characteristic letter code, starting from 01, 02, and 03. The first 0 indicates that the decomposed characteristic does not belong to multiple characteristics.
2.2 Characteristic Name
List all the characteristic codes and characteristic names of each component geometry. The characteristic name of the bolt is shown in Example 4. Example 4: See Table 3
Table 3 Bolt Characteristics Name
Type Letter Code
Thread Type
Nominal Thread Size
2.3 Characteristics Arrangement
GB/T 15049.1-94
Continued Table 3
Thread Length
Wrench Width
Order Accessories
Spring Height
All characteristics of the dimension and (or) product standard cited from GB10091 and "CAD Standard Part Graphic File" standards must be listed, the corresponding value symbol of the dimension letter code and the whole piece number, etc. At the same time, the GB10091 "Object Characteristics Table" of the dimension and (or) product standard is indicated. See Example 5 CAD Graphic Property Table.
2.3.1 Structure of characteristic table
Mark the code of the GB10091 object characteristic to be interpreted in the header at the top (see Example 5). If there is no corresponding object characteristic table, mark "omitted".wwW.bzxz.Net
a. Header "Characteristic" row
List the following characteristics in the characteristic row in the above order: (1) Object characteristics (single, multiple, combined characteristics) cited from GB10091, arranged in alphabetical order (such as: A, B1, B2, 3, C01, C02, D11, D12, D13, D2, D3, E, F) (2) Geometric characteristics cited from dimension and (or) product standards, arranged in alphabetical order (such as: AAA, AAB, AAC). (3) Supplementary characteristics, arranged in alphabetical order (such as: BAA, BAB, BAC). (4) Functional characteristics, arranged in alphabetical order (e.g. CAA, CAB, CAC). 5) Algorithmic characteristics, indicated in the characteristic file (e.g. DAA, DAB, DAC). Indicate all characteristics and the corresponding characteristics in each standard code line (marked with quantity symbols). For the characteristics used for geometric description or identification proposed in accordance with the "CAD Standard Part Graphic File" standard, mark "" under the corresponding character code in the header characteristic line.
b. The arrangement of the characteristics of the dimensions and (or) product standards listed in the first column of the table is shown in Table 4.
..com Dimensions and (or)
Product Standards
GB 999993
Part 1
GB999991
Part 2
GB 8888813
Type AC
GB8888813
Centre distance of holes of isosceles angle steel
Centre distance of holes of isosceles angle steel
Slotted round head screw
Open pan head screw
Slotted flat head screw
Open fan head screw
Hexagonal screw
Round head for aerospace use
Cross slot screw
GB/T 15049.1—94
Table 4 CAD graphic characteristics table
Belonging to the object characteristics table:
GB10091 series standard number
Characteristics and letter codes
(*: graphic related characteristics)
Note, 1) CB99999 and GB88888 are both assumed. c
The geometric structure type of standard parts depends on each standard and has different representations as shown in Figure 2. AAB
Circle number in the object characteristics
table
: Structural type
GB/T 15049. 1---94
Standard code (e.g. Hexagonal screw part 1, through hole) Type
Type E
Figure 2 Different structural types of standard parts
The above-mentioned characteristic table can have the following filling contents: (1) Standard code:
(2) Standard code, model code;
(3) Standard code, model code, value range; Type
Type 1
(4) Standard code, value range.
In order to clearly indicate the structural type, other necessary data should also be marked, especially the standard code, series, description, etc. (see the center distance of isosceles angle steel in Example 5). Reference the dimension letter code in the scale and (or) product standard. For each standard, the following are selectively indicated in the relevant characteristic field: (1) The dimension letter or the value symbol with the same function in the product or dimension standard; (2) "\ indicates that the characteristic is not available or necessary in the standard; (3) "=\ indicates that the characteristic value in the standard is a constant. Use "-" instead of the dimension letter and fill it directly in the table (see Example 5, GB88888 type D characteristic F)
(4) "+" and use text as the characteristic position number in the standard where the dimension letter is not marked. For example, the characteristics of the thread type (see bolt drawing file standard characteristic A01).
Usually only the nominal value is included in the table without considering the tolerance value in the scale and (or) product standard. When the tolerance value has a maximum and minimum value, it is necessary to distinguish and mark it. Required values ​​(see dwmin and dwmax in Example 5). Characteristics that are only used for calculations in the characteristic algorithm must also be shown in the table. Characteristics that are necessary for drawing but are missing in the size and (or) product standards must still be listed in the characteristic table. Their values ​​can be supplied later (for example; manufacturer, user).
d. Compile "entire parts and components" into the table
Fill in the names of the entire part and component in the entire part box (fill in "entire part and component" when both exist). Entire parts and components are explained in Chapter 4 of Part 5 "What are the graphic rules".
Each row corresponds to a structural type, and the code of the entire part and component should be clearly filled in accordingly. e. Fill in the drawing number of the dependent drawing in the table
Fill in the drawing number of the dependent drawing in the object characteristics table of this standard series into the table. When there are several dependent drawings, the drawing numbers are separated by "\". 2.4 Characteristics and values ​​of referenced standards shall be included in this document and described in the following clauses. GB/T 15049.1-94 2.4.1 If there is no series standard of this standard, it can be compiled directly on a one-to-one basis. The values ​​of referenced standards can be compiled directly on a one-to-one basis into the document currently being compiled. Example 6 shows the incorporation of characteristics when the dominant characteristic is applied. See Table 5
Table 5 Comparison table of dimension letters referenced in standard and incorporated characteristics Characteristics of current standards being compiled
Referenced standard
Medium and heavy threaded pipe
Whitworth pipe thread
Nominal width
Nominal width
2. 4. 2 There is no series standard of this standard, and the referenced standard cannot be incorporated one-to-one. The dimension letters and characteristics incorporated in the compiled standard BAA
When there is no series standard of this standard, and the values ​​in the standard cannot be incorporated one-to-one into the dominant characteristics of the document of the compiled standard, the range of characteristic values ​​can be incorporated and the individual values ​​can be expressed as shown in Section 2.5 of this part. The standard number and characteristic code related to this section are shown in Example 8. 2.4.3 There are series standards of this standard that can be incorporated into the referenced standard on a one-to-one basis. There are series standards of this standard, so that each of its characteristics can be directly adopted. This Article 7 indicates that in this case and with the help of the one-to-one incorporation of the dominant characteristics, the name of the referenced standard has only a notification meaning, for example: to facilitate the modification of services. Example 7: See Table 6
Characteristics of referenced standards and incorporated characteristics
Characteristics of the referenced standard before being incorporated
Dimensional standards cited
Medium and heavy threaded pipes
Lin's pipe thread
Series of this standard cited
Series No. 4711
Series No. 4712
Dominant characteristics
2.4.4 Existing series standards of this standard cannot be incorporated into A3 one-to-one
Incorporated characteristics
Although the referenced standard has a series standard of this standard, it cannot be incorporated one-to-one. For example, as shown in Article 2.5 of this article, the range of incorporated characteristic values ​​and the single value in it are shown.
Example 8 shows the standard number and the name of the relevant characteristics. The name of the referenced standard has only informational significance, for example: for change service, Example 8: See Table 7
-Referenced dimensional standards
GB 193--GR 196
GR 88888
Series of this standard cited
9001 Series number
6004 Series number
2.5 Table of characteristic values ​​of supplementary characteristics
GB/T 15049.1-94
Characteristics of referenced standards and incorporated characteristics
Characteristics of standards currently under preparation
In order to fully show other characteristics required for geometric display but not yet included in the size and (or) product specifications, it is stipulated that this supplementary characteristic (see Example 36 characteristic P4 and Example 30 characteristic BAA) lists the characteristic value range and specific value of the standard under preparation in a characteristic table (see Example 9). Supplementary characteristics can also be cited from the values ​​in the referenced standards. In addition to the values ​​in "cited from referenced standards" in Section 2.4 of this part, they can be incorporated together with the scale letter and characteristic code in the referenced standards, as shown in Examples 6 and 7, where each display in the standard currently under preparation clearly quotes the value in the referenced standard. In this case, there is no need to repeat these values ​​and codes. However, it needs to be processed according to the "3AE" column in Example 7. Example 9; See Table 8
Table 8 Characteristic values ​​of supplementary characteristics
Supplementary characteristics
2.6 Characteristic value table of functional characteristics
Functional characteristics are characteristics that are given values ​​only during assembly and are included in the specification
Hexagonal screw with thread to the head M1.6~10Hexagonal screw with thread to the head M12~~50Hexagonal screw with thread to the head M1.6~4.0Hexagonal screw with thread to the head M42~52See Technical Section 2.4.3 Table 5
If the functional characteristic has a certain initial value or boundary value, it should be given in the table. Note: The geometry generation procedure can only work within the valid value range (for example, between the initial value and the boundary value). Example 10: See Table 9
Table 9 Table of characteristic values ​​of functional characteristics
Functional characteristics
Initial value
Boundary value
Basic assembly value
Explanation of Example 10:
Functional characteristics
The meaning of the value is given in the meaning column.
GB/T15049.1—94
Continued Table 9
[0 12. 5]
(0 : 12.5)
[3·10/22
［8: 20/R10]
[3: $AAR. ]
[MII SAaF.]
F'A?E」
1: Functional characteristic CAA can accept the series of 3.5 and 7. 2 and 3: Functional characteristics CAB and CAC can accept the series of 1, 2, and 3. Meaning
Initial value
Boundary position
No top
Conical end
Small semicircular countersunk head
Initial value
Real value of AAA
Real value of AAB
Real value of AAC
4; Functional characteristic CAG can accept any value within the range of 0~12.5. The angle value is already included. 5 Functional characteristic CAH can accept any value within the range of α~～12.5. However, the boundary values ​​(0 and 12.5) are not included. 6: The function characteristic CAT can accept the arithmetic progression of 3.5 and 79 in the numerical range of 3 to 10, and the difference is 2. 7: The function characteristic CAK can accept the sequence of 8, 10, 12.5, 16.20 in the R10 number system of GB123. 8: The numerical range with boundary values ​​is determined by other characteristics. For AAB, the effective value is set only when it is necessary. GB/T 15049.1-. 94
9: The numerical range with boundary values ​​is determined by other characteristics and according to the minimum value that can be displayed by the electronic data processing (EDV) system. If necessary, the maximum value that can be displayed can also be set according to the MAX data. 10: The function characteristic CBA can accept A and G in the character sequence r. 11: The function characteristic CRB can accept Ko, K and L in the characters. 12: The function characteristic CBC can accept A, B, C, D and E in the character sequence. 13: The 3-bit character Shen. You can choose to start with A or A., ​​and replace % with the character you want to represent. 14; To indicate any character string, you can choose to start with A or G. 15: Characteristic name string defined as characteristic data. To distinguish it from other character strings, the characteristic name string must be marked with boundary symbols "$" and "," .
2. Characteristic value table of classified characteristics
Characteristic data can often distinguish a variety of different conditions: such as type (for example, type A, B, C); series (for example, very light, light, heavy); plus (for example, fine, medium, coarse), etc. In order for a characteristic to cover as many conditions as possible, the characteristic types of classified characteristics are specified.
Example 11: See Table 10
Table 10 Characteristic Value Table of Classification Characteristics
Classification Characteristics
2.8 Predefined Attribute Characteristics
Type A
Type C
Form E
Countersunk Screw
Countersunk Screw
Countersunk Screw
In order to ensure that the characteristic items can be expressed as uniformly and clearly as possible, an attribute characteristic data item can be added. The attribute characteristics are predefined as follows:
Predefined Attribute Characteristics
Attribute Characteristic Name
Release Status
Use Status
2.8.1 Release Status
Performance Code
The release status can be divided into the characteristics in brackets, the characteristics of different product types and the characteristics preferred by the enterprise, which are the labels of a certain status in the life cycle of the marking object. The property code is FA2. Table 12 Release status compiled
Attribute generation
Release status
"Release of related products"
Priority application"
"Not for new design"
"Not used"
"Under development"
"Study and stimulate
'Add T maturity'
Release status code
1 (default value)The difference is 2. 7: The function characteristic CAK can accept 8, 10, 12.5, 16.20 in the R10 number series of GB123. 8: The numerical range with boundary values ​​is determined by other characteristics. For AAB, the effective value is set only when it is necessary. GB/T 15049.1-. 94
9: The numerical range with boundary values ​​is determined by other characteristics and according to the minimum value that can be displayed by the electronic data processing (EDV) system. If necessary, the maximum value that can be displayed can also be set according to the MAX data. 10: The function characteristic CBA can accept A and G in the character column r. 11: The function characteristic CRB can accept Ko, K and L in the character column. 12: The function characteristic CBC can accept A, B, C, D and E in the character column. 13: The 3-digit character string can be selected to start from A or A., ​​and replace % with the character to be represented. 14; To indicate any digit string, it can be selected to start from A or G. 15: Characteristic name string defined as characteristic data. To distinguish it from other character strings, the characteristic name string must be marked with boundary symbols "$" and ","".
2. Characteristic value table of classified characteristics
Characteristic data can often distinguish a variety of different conditions: such as type (for example, type A, B, C); series (for example, very light, light, heavy); plus (for example, fine, medium, coarse), etc. In order for a characteristic to cover as many conditions as possible, the characteristic types of classified characteristics are specified.
Example 11: See Table 10
Table 10 Characteristic Value Table of Classification Characteristics
Classification Characteristics
2.8 Predefined Attribute Characteristics
Type A
Type C
Form E
Countersunk Screw
Countersunk Screw
Countersunk Screw
In order to ensure that the characteristic items can be expressed as uniformly and clearly as possible, an attribute characteristic data item can be added. The attribute characteristics are predefined as follows:
Predefined Attribute Characteristics
Attribute Characteristic Name
Release Status
Use Status
2.8.1 Release Status
Performance Code
The release status can be divided into the characteristics in brackets, the characteristics of different product types and the characteristics preferred by the enterprise, which are the labels of a certain status in the life cycle of the marking object. The property code is FA2. Table 12 Release status compiled
Attribute generation
Release status
"Release of related products"
Priority application"
"Not for new design"
"Not used"
"Under development"
"Study and stimulate
'Add T maturity'
Release status code
1 (default value)The difference is 2. 7: The function characteristic CAK can accept 8, 10, 12.5, 16.20 in the R10 number series of GB123. 8: The numerical range with boundary values ​​is determined by other characteristics. For AAB, the effective value is set only when it is necessary. GB/T 15049.1-. 94
9: The numerical range with boundary values ​​is determined by other characteristics and according to the minimum value that can be displayed by the electronic data processing (EDV) system. If necessary, the maximum value that can be displayed can also be set according to the MAX data. 10: The function characteristic CBA can accept A and G in the character column r. 11: The function characteristic CRB can accept Ko, K and L in the character column. 12: The function characteristic CBC can accept A, B, C, D and E in the character column. 13: The 3-digit character string can be selected to start from A or A., ​​and replace % with the character to be represented. 14; To indicate any digit string, it can be selected to start from A or G. 15: Characteristic name string defined as characteristic data. To distinguish it from other character strings, the characteristic name string must be marked with boundary symbols "$" and ","".
2. Characteristic value table of classified characteristics
Characteristic data can often distinguish a variety of different conditions: such as type (for example, type A, B, C); series (for example, very light, light, heavy); plus (for example, fine, medium, coarse), etc. In order for a characteristic to cover as many conditions as possible, the characteristic types of classified characteristics are specified.
Example 11: See Table 10
Table 10 Characteristic Value Table of Classification Characteristics
Classification Characteristics
2.8 Predefined Attribute Characteristics
Type A
Type C
Form E
Countersunk Screw
Countersunk Screw
Countersunk Screw
In order to ensure that the characteristic items can be expressed as uniformly and clearly as possible, an attribute characteristic data item can be added. The attribute characteristics are predefined as follows:
Predefined Attribute Characteristics
Attribute Characteristic Name
Release Status
Use Status
2.8.1 Release Status
Performance Code
The release status can be divided into the characteristics in brackets, the characteristics of different product types and the characteristics preferred by the enterprise, which are the labels of a certain status in the life cycle of the marking object. The property code is FA2. Table 12 Release status compiled
Attribute generation
Release status
"Release of related products"
Priority application"
"Not for new design"
"Not used"
"Under development"
"Study and stimulate
'Add T maturity'
Release status code
1 (default value)
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