This standard specifies the technical requirements, test methods, inspection rules and dimension series of flat steel wire cylindrical helical compression springs. JB/T 6653-1993 Flat steel wire cylindrical helical compression springs JB/T6653-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Flat Steel Wire Cylindrical Helical Compression Spring
Subject Content and Scope of Application
JB/T 6653--93
This standard specifies the technical requirements, test methods, inspection rules and dimension series of flat steel wire cylindrical helical compression springs. This standard applies to cold-rolled steel wire cylindrical helical compression springs (hereinafter referred to as springs). Reference Standards
Metal Rockwell Hardness Test Method
Spring Steel
GB1222
Technical Conditions for Cold-rolled Cylindrical Helical Compression Springs G3 1239.2
GB1805
GB2271
GB4358
GB4362
Sampling inspection of cylindrical helical springs
Spring terminology
Oil quenched and tempered chrome-vanadium alloy spring steel wire for valves Music wire
Oil quenched and tempered chrome-silicon alloy spring steel wire for valves GB4459.4
GB5219
GB5220
3 Product classification
Mechanical drawing spring drawing method
Chrome vanadium spring steel wire
Chrome vanadium spring steel wire for valves
Springs are classified according to the type of load they bear as specified in Table 1. Table 1
Load type
Super heavy
Shape, size, parameters and code of spring Code
Shape, size, parameters and code of spring shall be as specified in Figure 1 and Table 2. Approved by the Ministry of Machinery Industry of the People's Republic of China on May 7, 1993
Implementation on January 1, 1994
Parameter name
Socket diameter
Arbour diameter
Spring outer diameter
Spring inner diameter
5 Technical requirements
JB/T665393
Parameter name
White height
Spring stiffness
Deformation base
5.1 Products shall comply with the requirements of this standard and be manufactured according to product drawings and technical documents approved by the prescribed procedures. 5.2 Materials
Spring materials shall be adopted in accordance with the provisions of Table 3. If other materials are used, it can be agreed upon by both the supplier and the buyer. Table 3
50CrVA
55CrSi
Standard No.
GB2271
GB5220
GIB 4362
GB1222
GB4358
Oil quenched-tempered chrome-vanadium alloy spring steel wire for valves Chrome-vanadium spring steel wire for valves
Oil quenched-tempered chrome-silicon alloy spring steel wire for valves Spring steel
Piano wire
5.2.2 The materials shall have the inspection quality certificate of the manufacturer and can only be used after being re-inspected and qualified by the spring manufacturer. 5.2.3 The quality base of the materials shall comply with the relevant provisions of the corresponding material standards. 5.3 Free height
The free height of the spring is the height of the spring when it is not under load. The limit deviation is in accordance with the provisions of Table 4. Table 4
H. Range
75~115
125~250
Limit deviation
5.4 Hardness
The hardness of the spring shall not be less than 42HRC.
5.5 Pitch
JB/T6653-93
When the spring is compressed to 80% of the maximum deformation, its normal pitch ring shall not touch. 5.6 Spring characteristics
When the deformation is in accordance with the values ​​specified in Tables 5 to 8, it shall comply with the corresponding load, and its limit deviation shall be within the range of ±10%. 5.7 Permanent deformation
The permanent deformation of the spring shall not be greater than 1% of the free height H. 5.8 Appearance
The surface of the spring should be smooth and free of harmful defects that can be seen by the eye. 5.9 Spring outer diameter and inner diameter
The limit deviation of the outer diameter of the spring is D2.8.., and the limit deviation of the inner diameter is D,t81. 5.10 Straightness
In the free state, the perpendicularity of the spring axis to the two end surfaces shall not exceed 0.05H. (2°52'). 6 Dimension series
6.1 Light sizes are shown in Table 5.
6.2 Medium sizes are shown in Table 6.
6.3 Heavy sizes are shown in Table 7.
6.4 See Table 8 for super heavy sizes.
Installation size
Diameter from hole
Spindle diameter
Spring size
Degree of freedom
Spring stiffness
Specified value
Deformation
Maximum
Deformation
Installation size
Holes diameter
Spindle diameter
Spring size
JB/T 665393
Continued Table 5
Spring stiffness
Free height
Specified value
Deformation
Maximum value
Deformation
Installation size
Socket diameter
Spindle diameter
Spring ruler
JB/T6653—93
Continued Table 5
Spring stiffness|| tt||Free height
Specified value
Deformation
Maximum value
Deformation
Installation dimensions
Socket diameter Mandrel diameter
Spring dimensions
JB/T6653-93
Continued Table 5
Spring stiffness
Free height
Specified value
Note: The lower right corner of F in the table The number is the percentage of H. The same number is also marked on the lower right of its corresponding P. Table 6
Installation size
Corrosion hole diameter
Spindle diameter
Spring size
Free height
Spring stiffness
Specified value
Deformation
Maximum value
Deformation
Maximum value
Deformation
Installation dimensions
Window hole diameter
Spindle diameter
Spring dimensions
JB/T6653--93
Continued Table 6
Spring stiffness
Free height
Specified value
Deformation
Maximum value
Deformation
Installation dimensions
Window hole diameter
Spindle diameter
d tmer
Spring size
JB/T6653--93
Continued Table 6
Spring stiffness
Free height
Specified value
Deformation
Maximum value
Deformation
Installation size
Socket diameter Mandrel diameter
Spring size
JB/T6653-93
Continued Table 6
Spring stiffness
Free height
Specified value
Deformation
Note: Table The number on the lower right of F is the percentage of H. The same number is also marked on the lower right of its corresponding P. Table 7
Installation dimensions
Socket diameter Mandrel diameter
Spring dimensions
Spring stiffness
Free height
Specified value
Deformation
Maximum value
Deformation
Installation dimensions
Socket diameter Mandrel diameter
Spring dimensions
JB/T6653---93
Continued table?
Spring stiffness
Free height
Specified value
Deformation load
Maximum value
Deformation
Installation dimensions
Socket diameter
Spindle diameter
Spring dimensions
JB/T 6653—93
Continued table?
Spring stiffness
Free height
Specified value
Deformation
Maximum value
Deformation
Installation size
Socket diameter
Spindle diameter
Spring size
JB/T6653--93
Continued Table 7
Spring stiffness
Free height
Specified value
Deformation
Note: The number on the lower right of F in the table is the percentage of I., and the same number is also marked on the lower right of its corresponding P. Table 8
Installation dimensions
Socket diameter Mandrel diameter
Spring dimensions
Free height
Spring stiffness
Specified value
Deformation
Maximum valuebZxz.net
Deformation base
Maximum value
Deformation
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.