This standard specifies the representation of splines. This standard is applicable to the representation of rectangular splines and involute splines and their connections in mechanical drawings. GB/T 4459.3-2000 Representation of splines in mechanical drawings GB/T4459.3-2000 Standard download decompression password: www.bzxz.net

GB/T4459.3—2000
This standard is compiled based on ISO6413:1988 "Technical drawing representation of spline connection and fine tooth connection", and is equivalent to this international standard in terms of technical content.
This revised standard replaces GB/T4459.3—1984 "Method of drawing splines in mechanical drawings", making the spline representation method consistent with the international standard to meet the needs of international trade, technology and economic exchanges. The spline representation method is a special representation method in mechanical drawings. According to the needs, this standard has the following differences from the international standard: 1. ISO6413 stipulates that the end of the spline working length is drawn with a thick solid line; this standard stipulates that the end of the spline working length and the end of the tail length are drawn with a thin solid line. 2. This standard adds the dimensioning of splines. Appendix A of this standard is the standard appendix.
This standard was proposed by the State Machinery Industry Bureau. This standard is under the jurisdiction of the National Technical Committee for Standardization of Technical Product Documents (CSBTS/TC146). The drafting units of this standard are: Mechanical Science Research Institute, Shaanxi Standard Metrology Information Institute, China Institute of Atomic Energy, and National Technical Committee for Standardization of Machine Shafts and Accessories.
The main drafters of this standard are: Yang Dongbai, Hou Weiya, Qiang Yi, Zhang Xiangyang, Ming Cuixin, and Huang Ju. 1
GB/T4459.3—2000
ISO Foreword
ISO (International Organization for Standardization) is a worldwide federation of national standardization bodies (ISO member bodies). The work of formulating international standards is usually done by ISO's technical committees. If each member body is interested in a project established by a technical committee, it has the right to participate in the work of the committee. International organizations (official or unofficial) that maintain contact with ISO may also participate in the relevant work. In terms of electrotechnical standardization, ISO maintains a close cooperative relationship with the International Electrotechnical Commission (IEC). The draft international standard proposed by the technical committee is circulated to the member organizations for voting by the member organizations. At least 75% of the votes in favor are required for publication as an international standard. ISO6413 was drafted by Technical Committee ISO/TC10, which is responsible for the "technical product document". 1 Scope
National Standard of the People's Republic of China
Mechanical drawings
Spline representation
Mechanical drawings-Representation of splinesThis standard specifies the representation of splines.
GB/T4459.3—2000
eqvIso6413:1988
Replaces GB/T4459.3—1984
This standard applies to the representation of rectangular splines and involute splines and their connections in mechanical drawings. 2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1144—1987 Rectangular splines Dimensions, tolerances and inspection of rectangular splines (negISO14:1982) GB/T3478.1—1995 Basic profile tolerances of cylindrical spur involute splines (eqvISO4156:1981) GB/T14691-—1993 Technical drawing fonts (eqvISO3098-1:1974) GB/T15758—1995 Basic terminology of splines (neqISO4156:1981) 3 Definitions
For the terms involved in this standard, see GB/T15758. 4 Drawing and dimensioning of splines
4.1 Drawing and dimensioning of rectangular splines 4.1.1 In parallel with the spline axis In the view of the projection surface, the major diameter of the external spline is drawn with a thick solid line, and the minor diameter is drawn with a thin solid line, and part or all of the tooth shape is drawn in the cross-sectional view (Figure 1). 44
4.1.2 In the cross-sectional view of the projection surface parallel to the spline axis, the major diameter and minor diameter of the internal spline are drawn with thick solid lines, and part or all of the tooth shape is drawn in the partial view (Figure 2). Approved by the State Administration of Quality and Technical Supervision on July 24, 2000, implemented on December 1, 2000
GB/T4459.3—2000
4.1.3 The terminal end of the working length of the external spline and the end of the tail length are drawn with a thin solid line and are perpendicular to the axis. The tail is drawn as an oblique line, and its inclination is The angle of inclination is generally 30° to the axis (Figure 1). If necessary, it can be drawn according to the actual situation. 4.1.4 The drawing method of the partial section of the external spline is shown in Figure 3, and the view of the projection plane perpendicular to the spline axis is drawn according to Figure 4. AI
4.1.5 The dimensioning of the spline is as follows:
a) When the major diameter, minor diameter and key width are marked with general dimensions, the notation method is shown in Figure 1 and Figure 2. When the spline mark specified in the relevant standards is used for marking, the notation method is shown in Chapter 6.
b) The spline length should be marked in one of the following three forms: marking the working length (Figure 1, Figure 2, Figure 5); marking the working length and tail length (Figure 6); - marking the working length and full length (Figure 7).
4.2 The drawing method and dimensioning of involute splines GB/T4459.3—2000
4.2.1 The drawing method of involute splines is shown in Figure 8. Except that the pitch circle and pitch line are drawn with fine dotted lines, the rest of the drawing is the same as that of rectangular splines, see 4.1.1 to 4.1.4.
4.2.2 The dimensioning of involute splines is the same as that of rectangular splines, see 4.1.5. AI
5 Drawing of spline connections
In assembly drawings, when spline connections are represented by sectional views, the connection parts are drawn as external splines. The drawing of rectangular spline connections is shown in Figure 9, and the drawing of involute spline connections is shown in Figure 10.
6 Method of marking splines
6.1 Graphic symbols
The type of spline is indicated by graphic symbols. The graphic symbol for rectangular splines (see GBT1144) is shown in Figure 11, and the graphic symbol for involute splines (see GB/T3478.1) is shown in Figure 12. The scale and size of graphic symbols are shown in Appendix A (Standard Appendix). 3
6.2 Marking method
GB/T4459.3—2000
The marking of the spline should be written on the reference line of the guide line. The marking method is shown in Figures 13 to 16. When the spline markings cannot meet all the requirements, the necessary data can be listed in the figure or explained in other relevant documents. LX23H7X26HLDX6H11
GB/T 1144-1987
A6×23H7/f7X26H10/a/1XH1/10GB/T[144-198TFigure 15
AEXT24Z ×2.5mX30RX56GB/T3478.1-1995Figure 14
ATNT/EXT21ZX2.5mX3QRX5/5h
GB/T 34T8-1 -1995
A1 Basic requirements
GB/T4459.3—2000
Appendix A
(Standard Appendix)
Proportions and sizes of spline type graphic symbols The size of spline type graphic symbols shall be coordinated with other dimensions and symbols on the drawing. A1.1 The line width (a') of the spline type graphic symbol is equal to 1/10 of the height (h) of the dimension numerals indicated on the corresponding drawing. A1.2 The numbers and capital letters in the spline marking shall be selected in accordance with the provisions of GB/T14691 and shall be consistent with the font type, font width (d) and font height (h) on the corresponding drawing.
The graphic symbols are drawn in the proportions shown in Figures A1 and A2. Figure Alwww.bzxz.net
The size parameters related to the spline type graphic symbols are shown in Table A1. Table A1
Number and capital letter height
Symbol line width a
Font line width d
Symbol height code
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