This standard specifies the types, drawing methods and use requirements of mechanical processing positioning support symbols (referred to as positioning symbols), auxiliary support symbols, clamping symbols and common positioning and clamping device symbols (referred to as device symbols). JB/T 5061-1991 Mechanical processing positioning and clamping symbols JB/T5061-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5061-91
Mechanical Processing Positioning and Clamping Symbols
Published on May 17, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of ChinawwW.bzxz.Net
Implemented on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Mechanical Processing Positioning and Clamping Symbols
Subject Content and Scope of Application
JB/T 5061-·91
Replaces JB/Z17482
This standard specifies the types, drawing methods and use requirements of mechanical processing positioning support symbols (referred to as positioning symbols), auxiliary support symbols, clamping symbols and commonly used positioning and clamping device symbols (referred to as installation and symbols). This standard is applicable to the mechanical manufacturing industry when designing product fog and component machining process regulations and compiling process equipment design task books.
2 Reference standards
GB4457.4 Mechanical drawing lines
GB 4863
GB10008
3 Terms
Basic terms for mechanical manufacturing technology
Basic terms for mechanical processing equipment
The terms used in this standard shall comply with the provisions of GB4863 and GB【0008. 4 Special numbers
4.1 Locating support symbols
Locating support symbols shall comply with the provisions of Table !
Locating support
Bearing type
Fixed
Movable
Marked on the view rotation line
Marked on the front of the specification drawing\
Note: 1) The front of the specification drawing refers to the projection surface facing the designer. 4.2 Auxiliary support symbols
Auxiliary support symbols shall comply with the provisions of Table 2.
Approval number of the Ministry of Machinery and Electronics Industry on 1991-05-17
Joint positioning
Marked on the view wheel rate line
Marked on the front of the drawing
Implementation on 1992-07-01
Independent support
Marked on the specification drawing wheel rate line
4.3 Clamping symbol
Marked on the front of the view
JB/T501-91
Joint support
Marked on the specification drawing wheel rate line
Clamping symbols shall be in accordance with the provisions of Table 3. The letter codes in the table are uppercase Chinese pinyin letters. Table 3
Clamp power source
Manual clamp
Hydraulic clamp
Pneumatic clamp
Electromagnetic clamp
Marked on the wheel rate line of the specification drawing
4.4·Common device symbols
Common device symbols are in accordance with the provisions of Table 4,
Marked on the front of the specification letter
Marked on the wheel money of the specification drawing
Marked on the front of the specification drawing
Marked on the front of the specification drawing
Marked on the front of the specification drawing| |tt||JB/T5061--91
(This symbol is also used for spline core pins)
(Including material mandrels)
Inner drawing top
Floating page
JB/T5061-91
Continued Table 4
5 How to draw various symbols
5.1 How to draw locating support symbols and auxiliary support symbols JB/T5061—91
5.1.1 The dimensions of locating support symbols and auxiliary support symbols shall be as specified in the figure below. y 11-8
5.1.2 The basic graphic dimensions of the combined locating and auxiliary support symbols shall comply with the provisions of Article 8.1. The length of the connecting line between the basic symbols can be determined based on the position in the process diagram. The connecting line is allowed to form a broken line, as shown in Appendix A (reference) No. 29. 5.1.3 The shape of the corrugations in the movable locating support symbols and auxiliary support symbols are not specifically specified. 5.1.4 The lines of the positioning support symbol and the auxiliary support symbol shall be in accordance with the line width/3 specified in GB4457.4, and the height of the symbol shall be 1 to 1.5 times the height of the number in the process drawing.
5.1.5 The positioning support symbol and the auxiliary support symbol may be marked on the extension line of the wheel seat of the specification drawing, or on the lead-out line of the projection surface, as shown in numbers 19 and 29 in Appendix A and numbers 3 and 4 in Appendix B (reference). 5.1.6 The lead-out line of the uncut center hole shall start from the intersection of the axis and the end face, as shown in numbers 1 and 2 in Appendix A. 5.1.7 When more than two positioning points are arranged on a positioning surface of a workpiece and there is no specific requirement for the position of each point, it is allowed to express them by adding numbers to the right of the positioning symbol. It is not necessary to draw the symbol of each positioning point. The height of the number on the right of the symbol should be consistent with the height of the symbol 4. For marking examples, see Appendix A and Appendix B.5.2 Drawing method of clamping special number
5.2.1 The size of the clamping symbol shall be determined according to the size and position of the process drawing. 5.2.2 The line of the clamping symbol shall be 6/3 of the line width specified in GB4457.4. 5.2.3 The length of the connecting line of the linkage clamping symbol shall be determined according to the position in the process drawing. The connecting line is allowed to be drawn as a broken line, as shown in No. 28 in Appendix A,
5.3 Drawing method of device symbol
The size of the device symbol shall be determined according to the position in the process drawing, and its line width shall be 3/3 of the line width specified in GB4457.4. 6 Use of positioning, clamping and loading symbols 6.1 Positioning symbols, clamping symbols and device symbols can be used separately or in combination. 6.2 When the symbols alone are not clear, additional explanations may be provided in words. 7 Examples of the application of various symbols
7.1 For examples of the marking of positioning, clamping symbols and mounting symbols, see Appendix A. 7.2 For examples of the application of positioning and clamping symbols and the corresponding fixture structures, see Appendix B. 5
Headside fixed center, tail end fixed tip positioning lever support
Headside fixed center, tail end movable tip positioning lever sample
Headside internal tip, bed
Ny rotary tip positioning clamp recommendation
Headside external tip, bed
Tail rotary tip positioning clamp continuation
Headside spring-loaded head positioning
clamp case, with axial
positioning in the chuck, tail end internal center
spring-loaded chuck positioning clamp case
JB/T5061—91
Appendix A
Example of comprehensive marking of positioning, clamping symbols and installation symbols (reference)
Positioning and clamping case symbol marking is in accordance with the national
installation symbol marking or with positioning.
Schematic diagram of clamping symbol joint marking
Hydraulic spring head positioning
Clamp, with shaft in the chuck
Directional positioning
Elastic spindle positioning clamp
Pneumatic elastic spindle positioning
Clamping, with end face positioning
Dimensional spindle positioning clamp
Column center positioning clamp
With elastic face positioning
Three-gu chuck positioning clamp
JB/T5061—91
Continued table A1
Schematic diagram of positioning and solid purple symbol marking
Research symbol marking or joint marking with positioning and
Selling purple symbol marking diagram
Spinning three-gu chuck positioning
Clamping, with end face positioning||t Four-gourd chuck positioning solution, with axial positioning Four-gourd chuck positioning clamp, with end face positioning Head fixed item, tail moving item tip positioning, with tool rest auxiliary support in the middle, wire rod support (long axis parts) Head three-gourd chuck with axial positioning clamp, tail center frame support positioning Stop plate positioning bolt pressure plate clamp JB/T5061~91 Continued Table A1 Positioning and clamping symbol marking schematic diagram Device symbol marking or combined marking schematic diagram with positioning and clamping symbols
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