This standard specifies the dimensions and tolerances of smooth right circular cones. This standard applies to technical drawings and related technical documents. GB/T 15754-1995 Technical Drawing Dimensions and Tolerances of Circular Cones GB/T15754-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T 15754—1995
Technical drawings
Dimensioning and tolerancing of conesPublished on 1995-11-23
Implemented on 1996-07-01
Published by the State Administration of Technical Supervision
National Standard of the People's Republic of China
Dimensioning and tolerancing of conesWww.bzxZ.net
Technical drawings
Dimensioning and tolerancing of cones cosesCD/T15754—7995
This standard is equivalent to the international standard SC3040—19904 Technical drawings-dimensioning and tolerance annotation-cone 3.1 Main content and scope of application
This standard specifies the dimension and tolerance annotation of smooth straight cone (hereinafter referred to as cone). This standard is applicable to technical drawings and related technical documents. 2 Reference standards
GB 15? Dimensions and tolerances of cone angles
GB1113T Dimensions and tolerances of self-stirring cones with handles GB7093.2 Shape symbols for material representation, shape symbols for product technical documents CB11334
Cone specifications
GB12361)
3 Terminology
Cone fit
The basic terms and definitions of related international cones shall be in accordance with the provisions of B157. 4.4.1. Feature number According to the functional requirements of the drawing (such as connection, assembly, centering, sealing and adjustment, etc.), the feature parameters in Table 1 should be selected and combined for marking. 4.2. ... 9951123 Approved marking example
Option method
Optional method
1996-07-01
Measurement of large circular diameter
Minimum four-dimensional diameter
Circular diameter at the initial loss surface
Measurement of body length
Length of initial transverse surface
4.3 Dimension marking
4.3.1 Functional symbol indicating dimension
CB/T15754- 1995
Continued Table 1
Character Symbols
Standards
Optimal Methods
The graphic symbol shown in Figure 5 should be used on the drawing. The symbol should be placed on the base line (Figure 5). The national shape symbol and the degree of measurement should be close to the wheel rate mark. The base line should be connected to the wheel separation standard through the lead-out line. The base line should be parallel to the axis of the circle. The direction of the national shape symbol should be consistent with the measurement direction. Graphic symbol degree GB70 93.2 solidification, 4.3.2 marking method
CB/T15754—1995
Graphic symbols
Guideline
Font height
The marking of the cone demon on the drawing is shown in Figure 9. When the marked degree is one of the standard drawing series (especially the Morse degree is metric degree + see GD1443), it can be represented by the standard series letter and the corresponding mark (Figure 10)
Morse Na.3
5 Method of marking tolerances of drawings
5.1 General
CB/T15754—3995
For the internal and external drawings of structures that meet the requirements, the tolerances of drawings shall be marked according to the surface tolerances specified in 5.2.1~5.2.6. The tolerances of drawings shall also be marked by the standard method specified in the Appendix (reference part). When the requirements are met, the tolerance standard method specified in the Appendix (reference part) may be used to mark the same tolerances. 5.2 Marking examples
5.2.1 Medical cone with a given cone angle Tolerance annotation (Figure 11)
5.2.2 Tolerance annotation of cone of given dimension (Figure 12)
5.2.3 Tolerance annotation of axial position of given cone (Figure 13)
GH/F15754—1995
Guohua Tolerance
5.2. Tolerance annotation of cone of given axial position (Figure 11)
5.2.5 Tolerance annotation of cone related to datum line (while confirming the same auxiliary relationship, Figure 15) G8/T 157541995
National standard
52.6 Method for matching circles (16,172 Note
According to the requirements of GB1236, the matching circle should ensure the radial (or) directional position of each assembly. When marking the dimensions and specifications of two matching circles, it should be determined that the basic dimensions of the drawing with the same minimum and maximum dimensions and the marked dimension tolerances are consistent, and the theoretical correct dimensions of the diameter (Figure 16) and the position (Figure 17) are related to the reference plane of the two assembly parts. 5
6 Limit rate
GB/T15754-1995
When necessary, limiting conditions can be given to ensure that the actual factors do not exceed the given tolerances. These limiting conditions can be specified in the technical requirements on the drawings:
) Additional tolerance requirements, as shown in Figure 1B, A3, and B1. h) In the technical requirements, such as:
Color coating inspection + contact test 80%. The marked properties of the sample, the material tolerance (including the cumulative straightness) is found in the wheel pressure tolerance zone, Figure 18 A1 General Principles GB/T15754-1995 Appendix A Basic Method (Consistent with the method of GB/T15754-1995) (Reference) This taper method is usually used for structural types with matching requirements. The basic method is a method of marking a tolerance zone that indicates that the required dimensions of the cone and its geometric characteristics have a mutual subordinate relationship, that is, two tolerance zones with ideal shapes are formed by two axial surfaces (the minimum and minimum physical dimensions of the required items), and the actual dimension shall not exceed these two envelopes. Therefore, this tolerance zone controls the size of the tooth diameter and the size of the tooth cone angle, and also controls the shape of the surface of the cutting cone. If there are steps, the cone angle tolerance and related geometric specifications can be given for further refinement. A2 marking example
A2.1 Given the dimension A light tolerance Tn (Figure A1)
marked on the drawing
A2.2 Given the cross-sectional tank diameter tolerance TL (Figure A2) Figure Al
marked on the drawing
GB/T15754--1995
A2.3 Given the male shape specification (Figure A3) marked on the drawing
: Material specification (including the actual straightness> within the wheel tolerance specification. Figure A3
A2.4 Matching tolerance annotation method (Figure A4, A5)
B1 total drama
L nine ± 0.2
1·1995
GE/T15754
Figure 4
Appendix B
Tolerance taper method
(consistent with two other tolerance adjustment methods such as GE1133A) (Part)
The tolerance taper method is only applicable to the circular dimension and sealing and non-matching tapers with high requirements for a certain diameter. The tolerance taper method is to directly give the tolerance of the relevant circular elements, that is, to give the cone diameter tolerance and the circumference angle tolerance at the same time (Figure B1, B2), and not to form a marking method for the tolerance zone of two coaxial circles. At this time, the given surface diameter tolerance only controls the surface diameter deviation, and no longer controls the rounding adjustment. T and 4T are set separately and adjusted to meet the requirements respectively, so the problem can be solved by separate text. If necessary, the relevant geometric tolerance requirements can be attached for further control (B1). H2 marking example
CB/T15754-1995
The marking example of the diameter tolerance T of the mother circle and the dimension angle tolerance AT is shown in Figure B1. Given the diameter tolerance T of the surface perimeter and the dimension angle tolerance AT, the marking method is shown in the national 2 standard.
25°±30
Explanation: The maximum dimension diameter of the perimeter should be D+T/2 and +DT. /2 is determined to vary between 2430° and 2530°. The national standard straightness requirements for the dimension are as follows. These requirements should be considered independently. 25\±AT8/2
Note: The given diameter of the dimension in this country should be determined by 4+T/2 and -s/2. However, it should vary between 25-AT8/2 and 25+4T8/2. These requirements should be considered independently. Additional notes:
This standard is issued by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard is funded by the Machinery Standardization Research Institute of the Ministry of Machinery Industry, Huazhong University of Science and Technology and other units. The main drafters of this standard are Qiang Shu, Ting Xiaopei, Jiang Tianyi and Zhou Zhong. This standard replaces the chain length symbol in Figure 31b in Article 3.7 of GB4458.4-81 Mechanical Drawing Dimension Note 3 and the corresponding standard example in Table 1.
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