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GB/T 17852-2018 English PDF

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GB/T 17852-2018: Geometrical product specifications (GPS) -- Geometrical tolerancing -- Profile tolerancing
Status: Valid

GB/T 17852: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 17852-2018759 Add to Cart 6 days Geometrical product specifications (GPS) -- Geometrical tolerancing -- Profile tolerancing Valid
GB/T 17852-1999279 Add to Cart 3 days Geometrical tolerancing. Tolerancing of profile Obsolete

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GB/T 16892   GB/T 17851   GB/T 18851.1   GB/T 19799.3   

Basic data

Standard ID: GB/T 17852-2018 (GB/T17852-2018)
Description (Translated English): Geometrical product specifications (GPS) -- Geometrical tolerancing -- Profile tolerancing
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 01.100.20
Word Count Estimation: 38,330
Date of Issue: 2018-09-17
Date of Implementation: 2019-04-01
Older Standard (superseded by this standard): GB/T 17852-1999
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 17852-2018: Geometrical product specifications (GPS) -- Geometrical tolerancing -- Profile tolerancing


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Geometrical product specifications(GPS) - Geometrical tolerancing - Profile tolerancing ICS 01.100.20 J04 National Standards of People's Republic of China Replace GB/T 17852-1999 Product Geometric Specifications (GPS) Geometric Tolerance Profile tolerance label (ISO 1660.2017, MOD) Published on.2018-09-17 Implementation of.2019-04-01 State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 symbol 2 5 Rules for contour tolerance labeling 3 Appendix A (informative) Combination element 8 Appendix B (informative appendix) Rule illustration 10 Appendix C (informative appendix) Abolished labeling method 29 Appendix D (informative) Position 31 in the GPS matrix Reference 32

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 17852-1999 "Dimensions and Tolerances for Shape and Position Tolerance Profiles", and GB/T 17852- The main technical changes in.1999 are as follows. --- Increase the application range and interpretation of the outline symbol; ---Increase the description of some symbols in GB/T 1182-2018 and explain the details of these symbols in the contour tolerance Labeling rules; --- Increase the default rules for contour tolerance labels; --- Add Appendix A to explain the definition rules of the combined elements; --- Add Appendix B, including application examples for 16 profile specifications. This standard uses the redrafting method to modify the ISO 1660.2017 Product Geometric Specification (GPS) geometric tolerance profile Tolerance labeling. There are technical differences between this standard and ISO 1660.2017, and the terms involved in these differences have been passed through the margins on the outer side of the page. The vertical single line (—) is marked. The corresponding technical differences and their reasons are as follows. ---About the normative reference documents, this standard has made technical adjustments to adapt to China's technical conditions, adjustments The situation is reflected in Chapter 2, “Regulatory References”, and the specific adjustments are as follows. ● Replace ISO 1101.2017 with GB/T 1182-2018 modified to international standards; ● Replace ISO 8015.2011 with GB/T 4249-2018 modified to adopt international standards; ● Replace ISO 5459.2011 with GB/T 17851 modified to adopt international standards; ● Replace ISO 17450-1 with GB /Z 24637.1 equivalent to the international standard; ● Replace ISO 16792 with GB/T 24734, which is not equivalent to the international standard. This standard also made the following editorial changes. --- Deleted Table 1 in the introduction of ISO 1660.2017, and changed "Table 2 to Table 4" in ISO 1660.2017 to "Table 1 to Table 3." This standard is proposed and managed by the National Technical Committee for Standardization of Geometrical Specifications (SAC/TC240). This standard was drafted. Shanghai Automotive Group Co., Ltd. Technology Center, China Machine Productivity Promotion Center, Dai Keyi (Beijing) Technology Co., Ltd., Carl Zeiss (Shanghai) Management Co., Ltd., Zhengzhou University, Beijing Automobile Co., Ltd., Xi'an Jiaotong University, Qoros Auto Co., Ltd., Pan Asia Automotive Technology Center Co., Ltd., Hexagon Measurement Technology (Qingdao) Co., Ltd., Omnex (Shanghai) Consulting Co., Ltd. Division, SAIC-GM-Wuling Automobile Co., Ltd. The main drafters of this standard. Ming Cuixin, Shen Yujun, Wang Xili, Long Dongfei, Han Dingzhong, Zheng Peng, Teng Lijing, Yu Jichang, Jing Weizhen, Qiu Chenxi, Hu Min, Zhao Fengxia, Xu Mingyang, Wang Huizhen, Zhou Jiangqi, Zhu Yue. The previous versions of the standards replaced by this standard are. ---GB/T 17852-1999. Product Geometric Specifications (GPS) Geometric Tolerance Profile tolerance label

1 Scope

This standard specifies the geometric tolerance labeling rules for component and derived features. This standard applies to the line profile and face profile feature symbols defined in GB/T 1182-2018.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 1182-2018 Geometrical Product Specification (GPS) Geometric Tolerance Shape, Orientation, Position and Runout Tolerance (ISO ) 1101.2017, MOD) GB/T 4249-2018 Product Geometry Technical Specification (GPS) Fundamental Principles, Principles and Rules (ISO 8015.2011, MOD) GB/T 17851 Product Geometrical Specification (GPS) Geometric Tolerance Benchmark and Benchmark System (GB/T 17851-2010, ISO 5459.1981, MOD) GB /Z 24637.1 Geometrical Product Specifications (GPS) Generic Concepts Part 1. Geometric specification and verification mode (GB /Z 24637.1-2009, ISO /T S17450-1.2005, IDT) GB/T 24734 Product Technical Documents Digital Product Definition Data Regulations (GB/T 24734-2009, ISO 16792.2006, NEQ) ISO 17450-3 Geometrical Product Specifications (GPS) General Concepts Part 3. Measured Elements [Geometricalproduct Specifications(GPS)-Generalconcepts-Part 3.Tolerancedfeatures] ISO 22432 Product Geometry Specification (GPS) Elements used in specification and verification [Geometricalproductspecifica- Tions(GPS)-Featuresutilizedinspecificationandverification]

3 Terms and definitions

GB/T 1182-2018, GB/T 4249-2018, GB/T 17851, GB /Z 24637.1, ISO 17450-3, ISO 22432 And the following terms and definitions apply to this document. 3.1 Profile tolerance label profiletolerancing Geometric tolerance labels using line profile symbols or face profile symbols. 3.2 Line profile lineprofile The attributes of the line features. 3.3 Surface profile The properties of polygon features. 3.4 Unconstrained degrees of freedom non-redundantdegreeoffreedom The tolerance cannot be determined with a degree of freedom.

4 symbol

The symbols of the geometric features are shown in Table 1. Table 1 Symbols of geometric features Line profile symbol Circular outline symbol These symbols should be used in the symbol portion of the tolerance box, see 8.2 of GB/T 1182-2018. Table 2 gives the nominal elements that can be used for each symbol. Table 2 Combination of allowed geometric feature symbols and nominal measured elements Measured element Component (straight line) √ Export features (straight lines) √ Component (curve) √ Export features (curves) √ Component (flat surface) √ Export features (flat surface) √ Component (surface) √ Export features (surfaces) √ For lines and planes, other feature symbols can be used to directly give shape information of the measured elements. For example, the plane can be flattened. Straightness can be used for straight lines. Profile features can be used for lines and planes. However, at this time, to determine the nominal shape of the measured element The shape must be confirmed in the drawing or CAD model (if applicable) that the nominal shape of the measured feature has no surface or curve. Note. The nominal surface of the nominal flat surface and the large radius in the pattern are displayed as straight lines and the contour feature symbols can be used for both surface features. However, right For surfaces, non-planar, labeled in the pattern, or given in the CAD model with explicit or default TED. For flat surfaces, in the pattern Can not be marked in the middle. At this point, the nominal shape of the feature can be determined in the drawing based on whether or not the label is present. In CAD models, model data can be used Determine the nominal shape of the feature. Other symbols used in this standard and their reference documents are given in Table 3. Table 3 Additional symbols used in this document Description symbol reference Combined tolerance zone CZ ISO 1101. 8.2.2.1.2 in.2017 Independent tolerance zone SZ ISO 1101. 8.2.2.1.2 in.2017 Table 3 (continued) Description symbol reference Linear offset tolerance band (without specified offset) DZ ISO 1101. 8.2.2.1.4.1 in.2017 Linear offset tolerance (with specified offset) UZ ISO 1101. 8.2.2.1.3 in.2017 Joint element UF ISO 1101. 3.9 in.2017 Interval ISO 1101. 9.14 in.2017 Angle offset tolerance (without specified offset) VA ISO 1101. 8.2.2.1.4.2 in.2017 Full week (contour) ISO 1101. 9.12 in.2017 Full surface (contour) ISO 1101. 9.12 in.2017 Combined plane grid ISO 1101. Chapter 16 of.2017 Intersecting plane sash ISO 1101. Chapter 13 in.2017 Directional element grid ISO 1101. Chapter 15 of.2017 Direction only>< ISO 5459.2011 7.4.2.8

5 Rules for contour tolerance labeling

5.1 Overview See GB/T 1182-2018 for the outline tolerance tolerance section in Basic Geometric Tolerance Labeling. When the pattern is used in conjunction with the CAD model, the CAD model reference information should be marked in the pattern and the CAD model should be Combined with GB/T 24734. According to the principle of elements (see 5.4 of GB/T 4249-2018), the profile specification applies by default to a definition according to ISO 22432. Complete single element. It is the responsibility of the designer to specify the elements or parts of the specification that apply to the specification, and the appropriate symbols can be used on the 2D drawings. Note or defined in the CAD model. According to the independent principle (see GB/T 4249-2018, 5.5), when a profile specification is applied to multiple ISO 22432 When a complete single element is defined, the specification applies to these elements independently by default. When the profile specification applies to multiple features, if you want When these elements are considered as a whole or the tolerances of these elements are bound, the designer is responsible for using the appropriate two-dimensional pattern. The symbology is defined or defined in the CAD model. When using the "Full Surface" and "Full Week" labels in geometric tolerance labels, they should be combined with UF, CZ or SZ to Clarify whether the specification applies to a composite element, either by defining a combined tolerance band or by defining a set of independent tolerance bands, unless All non-redundant degrees of freedom with tolerance bands are locked by the reference referenced. Note 1. When the specification defines a set of tolerance bands, and all its unconstrained degrees of freedom have been locked with reference to the reference, CZ has the same meaning as SZ. Note 2. In the previous version of this standard, no other mark was used when using the “full week” specification. This will make its meaning vague and cannot be clearly identified. Whether a semantic specification applies to multiple features independently or as a combined tolerance. The "full week" specification should be used together with UF, CZ or SZ. A more secure method of labeling. 5.2 Default rules for profile tolerance labels 5.2.1 Rule A. Definition of the theoretical corrective element (TEF) The theoretical correct size (TED) can be used to define the theoretical correctness factor (TEF) of the measured feature or to integrate it into the CAD model. For size elements, the nominal shape of the TEF should be defined, but the nominal size of the TEF may not be defined, see Figure 4b). These TEDs can include. --- Clear TED; ---Default TED; --- a table of numerical and interpolation algorithms; --- Mathematical functions containing splines and other formulas; --- Refer to the CAD model query. If the TEF is displayed as a nominal line or a nominal plane on the drawing and is not labeled to define it as another nominal shape, by default TED definitions can be considered as nominal or nominal planes. The nominal shape of the TEF can be defined by default as a circle, a cylinder, a sphere, or a cone. When the baseline size has a defined TED definition, the nominal shape of the TEF can be defined as a ring. The size of a dimension feature is considered undefined unless there is a clear TED definition, so its size is also variable. Unless there is a clear The exact TED definition, otherwise the busbar dimensions of the ring are considered undefined. See also rule F and rule G. Note. The diameter of the center plane of the tolerance zone is fixed at the nominal size. Figure 1 defines the nominal profile of the ball (given by TED) If the TEF of a feature is defined using a table containing multiple sets of coordinates, a defined imputation should be given for the defined point between the given points. algorithm. Note 1. The method of labeling the interpolation algorithm has not been standardized. Note 2. The non-exhaustive interpolation algorithm table can include. ---Linear interpolation; ---Cubic spline interpolation (periodic or aperiodic); ---NURBS. Example. All points are connected to each other in a straight line. When TEF is integrated in the CAD model, it should comply with GB/T 24734. 5.2.2 Rule B. Type of the measured element Chapter 6 of GB/T 1182-2018 gives an labeling rule that distinguishes whether the measured feature is a component or an exported feature. When the feature symbol in the tolerance sash is a polygon profile symbol, the measured feature is a component or derived feature. When the feature symbol in the tolerance sash is a line profile symbol, the measured feature is. ---Export elements (see B.15); --- Any line element in a specified direction on the identified composition or export face (see B.14); or --- A specified line feature on the identified component or export face. If the feature being measured is a line feature identified on a polygon feature, the location of the line feature should be identified using TED. If the measured feature is an arbitrary line feature in a specified direction on the identified polygon feature, the direction of the line feature should be intersected. The plane sash is used to identify it, see Chapter 13 of GB/T 1182-2018. 5.2.3 Rule C. Definition of tolerance zone See Figure 2. Unless otherwise specified, for surface profile features, the tolerance band shall be limited to a series of balls with a diameter equal to the tolerance value and the center of the sphere on the TEF. See Rule E, Rule F, and Rule H between the two isometric envelopes. Unless otherwise specified, for line profile features, when the tolerance value is constant and the front is not marked with φ, the tolerance band shall be limited to the diameter, etc. For the tolerance value, the center of the circle is located between the two equidistant coplanar lines of a series of circles on the TEF, see rule E, rule F and rule H. Unless otherwise specified, for line profile features, when the measured feature is the derived line and the tolerance value is marked φ, the tolerance band shall be limited to The diameter is equal to the tolerance value, and the center of the sphere is located inside the envelope of a series of balls on the TEF, see rule H. Note. See also 8.2.2.1.1 of GB/T 1182-2018. Description. 1---TEF; 2---two balls or circles to represent the infinite number of balls or circles defining the tolerance band along the TEF; 3---tolerance band boundary; t---tolerance value. Figure 2 Definition of tolerance zone For the line profile feature of the component, the intersecting plane sash fully defines the direction of the intersecting plane containing the tolerance band, for example, Set it parallel to the reference plane or perpendicular to the reference axis. In other cases, such as being defined perpendicular to the reference plane or parallel to the reference axis, one of the directional angles may be unlocked. at this time, If the rule perpendicular to the face feature defines a uniform direction for each contour, then the intersection plane should be perpendicular to the face feature, see image 3. If the specification perpendicular to the polygon feature is that the direction defined by each contour is not uniform, such as a complex surface that is distorted along the contour, The angle of one direction of the intersecting plane is not locked, and the direction element grid should be used to define the angle of the second direction of the intersecting plane. a) Specification b) Direction of the intersecting plane containing the tolerance zone Description. 1---the intersection plane is perpendicular to the reference plane B; The 2---intersection plane is perpendicular to the measured element at each position. Figure 3 The direction of the intersecting plane, including the tolerance band of the line profile feature 5.3 Profile Tolerance Rule with Additional Specification Elements 5.3.1 Rule D. Measured element specification element If the measured element is not a complete single element, it should be marked with the tool given in GB/T 1182-2018, such as SZ, CZ, UF, “full surface”, “full week” and “interval”, or query CAD model (see B.5, Note 2). To prevent ambiguity, in the geometric specification, "all The "surface" and "full circumference" shall be used together with one of the SZ, CZ or UF unless all unconstrained degrees of freedom of the tolerance band have been locked by the reference system. SZ, independent tolerance band, modifier treats a single set of features as independent features with tolerances independent of each other. Because there are multiple measurements to be tested Therefore, it should also be specified using the same number of features. CZ, combined tolerance band, modifier treats a single set of features as separate features, but combines their tolerance bands. Because the measured elements are built Collection, so if there are no exported features in a single feature, you cannot define an exported feature. Therefore, when the functions of the measured elements are independent, but mutual When there is a relationship, it is appropriate to use the CZ modifier. The CZ modifier defines only one specified feature. UF, federated features, modifiers build a composite feature based on multiple single features. Even if there are no exported features in a single feature, You can define this composite feature as an export feature. Therefore, when a function is associated with a component that is considered to be a single element, or UF modifiers are appropriate when exporting features. A specification of a union feature or its derived features creates a tolerance band for the composite feature or its derived features. Because there is only one combination Elements, so there is only one stipulated feature. In the profile tolerance tolerance of the component, the application difference between UF and CZ is very small, and it is limited to the transition zone between the features in the tolerance zone. The shape difference of the domain. 5.3.2 Rule E. Asymmetric tolerance zone For the constituent elements, UZ should be used if the tolerance band is not symmetrically arranged according to rule C. This rule is in GB/T 1182- Given in 8.22.1.3 of.2018. 5.3.3 Rule F. Linear Offset Tolerance Band If the offset of the tolerance band relative to the TEF is not specified, but the offset should be a constant value, OZ should be marked in the tolerance box. This rule is given in 8.2.2.1.4.1 of GB/T 1182-2018. When the tolerance band does not take into account the nominal size, the OZ modifier should be......
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