This standard specifies the technical requirements, test methods, test rules, etc. of cylindrical helical compression springs with round cross-section materials (material diameter not greater than 10mm) and equal pitch with both ends tightened for hydraulic parts. This standard is applicable to springs for hydraulic parts. JB/T 3338.1-1993 Technical conditions for cylindrical helical compression springs for hydraulic parts JB/T3338.1-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Hydraulic cylindrical helical compression springs
Technical conditions
1 Subject content and scope of application
JB/T 3338. 1--93
Replaces JB333883
This standard specifies the technical requirements, test methods, inspection rules, etc. of circular cross-section materials (material diameter not greater than 10mm) and equidistant cylindrical helical compression springs with both ends tightened together for hydraulic parts (referred to as hydraulic parts springs). This standard applies to springs for hydraulic parts.
Referenced standards
GB224 Microscopic determination of the depth of decarburization layer of steel Metal Rockwell hardness test method
GB 1239.2
GB 1239.5
GB 1239.6
GB2271
GB3123
GB4357
GB4358
GB4361
GB5218
GB5219
Technical conditions for cold-rolled cylindrical helical compression springsSampling inspection of cylindrical helical springs
Calculation of cylindrical helical springs
Oil-fired and tempered chrome-vanadium alloy spring steel wire for valvesSilicon bronze wire
Carbon spring steel wire
Cui steel wire
Oil-fired and tempered silicon-manganese alloy spring steel wire
Silicon-manganese spring steel wire
Chrome vanadium spring steel wire
YB(T)11 Stainless steel wire for spring
3 Parameters, codes and units of springs
Parameters, codes and units of springs are shown in Table 1, Reference
Material diameter
Spring inner diameter
Spring middle diameter
Spring outer diameter
Increase in outer diameter when pressed
Free height
Working height
Installation height of inner spring
Height under test load
Approved by the Ministry of Machinery Industry of the People's Republic of China on 1993-05-07 Reference
Compression height ( Theoretical value)
Maximum compression height
Effective number of turns
Total number of turns
Number of bearings
Helix angle
Twist ratio
Implementation on 1994-01-01
Slenderness ratio (height-to-diameter ratio
Curvature coefficient
Working load
Installation load of Class C spring
Test load
Compression load (theoretical value)
Deformation under working load
Deformation under installation load of Class C spring
Deformation under test load
Deformation under compression load Quantity
Spring stiffness
4Typical working conditions
Typical working conditions are shown in Table 2.
Typical working conditions
F, F2
Known conditions
JB/T3338.1-93
Continued Table 1
Spring single cabinet stiffness
Shear modulus
Allowable shear stress
Working shear stress
Class C spring installation shear stress
Test shear stress (test stress)
Combined shear stress (theoretical value)
Tensile strength limit
Single piece weight
Note; ts-[
Structure examples
Applications
Pressure regulating springs for valve cores with conical
Pressure regulating springs for valve cores with round
cylindrical
Main valve return springs for pilot-operated pressure valves,
differential pressure valve springs for speed regulating valves and check valve springs
Plunger return springs for reversing valves and plunger
pumps
Load characteristics
Working load P, to
PP, is zero.
Load properties
Working load is usually
P, to a value less than
P, P:
is the
maximum load that may occur.
Load property
Working load is not
, it is
, all are fixed values.
Load property
Typical working conditions
Known conditions
JB/T3338.1—93
Continued Table 2
Structure example
Note: The definitions of Class 1, Class 2, and Class 3 loads are shown in GB1239.6. 5 Technical requirements
Application occasions
Proportional reversing valves and
Sliding valves supported by static pressure
Feedback mechanisms for the center spring
Load characteristics
The load is between greater than
P and less than P, and P
is the installation load. The linearity of the spring characteristics is required to be good.
Load properties belong to Class "
or Class 1
5.1 The product shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. See Appendix A (reference) for working drawings.
5.2 Materials
5.2.1 Commonly used materials for springs are shown in Table 3. If other materials are required, it can be agreed upon by the supplier and the buyer. Table 3
Carbon spring steel wire
Piano wire
Oil quenched and tempered chrome vanadium alloy spring steel wire for valves Oil quenched and tempered silicon manganese alloy spring steel wire
Chrome vanadium spring steel wire
Silicon manganese spring steel wire
Stainless spring steel wire for springs
Silicon bronze wire
Material brand or material grade, Group
Grade B, Grade C, Grade D
Group G1, Group G2, Group F
50CrVA
60Si2MnA
50CrVA
60Si2MnA
1Ct18Ni9Ti
QSi3-1
Standard No.
GB4357
GB4358
GB2271
GB4361
GB5219
GB5218
GB3123
5.2.2 Spring materials must have a certificate of conformity issued by the material manufacturer and can only be used after being re-inspected and qualified by the spring manufacturer. 5.3 Heat treatment
5.3.1 Springs made of spring steel wire that does not require quenching and hard silicon bronze wire must be subjected to stress relief annealing, and their hardness will not be assessed.
5.3.2 For springs that require quenching and tempering, the hardness value shall be selected within the range of 44 to 52HRC, and the hardness difference shall not exceed 5 units. 5.3.3 The metallographic structure of springs that require quenching and tempering shall comply with the provisions of relevant standards. 5.3.4 For cold-rolled springs that have been quenched and tempered, the depth of the single-sided decarburization layer (ferrite + transition layer) is allowed to increase by 0.25% of the material diameter compared to the depth of the decarburization layer specified in the raw material standard. 5.4 Permanent deformation
After the finished spring is compressed three times with the test load or the load specified in the drawing , no permanent deformation is allowed. 5.5 Spring characteristics and dimensional limit deviations
5.5.1 The limit deviations of spring characteristics (load or stiffness) are shown in Table 4.555
Note: The load of Class A spring refers to the load under deformation. 5.5.2 Dimensional limit deviations
JB/T3338.1-93
±0.12P:
5.5.2.1 The limit deviations of the outer diameter (or inner diameter) of the spring are shown in Table 5. Table 5
Effective number of turns
Difference, N or N/mm
Winding ratio
Minimum deviation value
Note: () According to user needs, the limit deviation of the outer diameter (or inner diameter) of the spring can be used in one direction, and its tolerance value should comply with the provisions of this table. Where unidirectional deviation is used, half of the basic size plus (or minus) the tolerance value shall be used as the calculation data when calculating the deformation disk and shear stress. (②) When there are special requirements for the outer diameter (or inner diameter) of Class B springs, they can be manufactured according to ±0.01D. 5.5.2.2 The limit deviation of the free height of the spring is shown in Table 6. Table 6
Height H.
>60~120
Not assessed
Note: According to user needs, the limit deviation of the free height of Class B springs can be used asymmetrically, but the tolerance value shall comply with the provisions of this table. 5.5.2.3
The limit deviation of the total number of coils of the spring is shown in Table?. 556
Minimum deviation value
5.5.3 Spring support ring
20～50
JB/T3338.1-93
5.5.3.1 The difference between the total number of spring rings and the effective number of rings is the number of support rings, which shall not be less than 2 rings. Generally, the total number of rings is not an integer. The tail of the total number of spring rings for Class A Group 1 working conditions is 0.5.
The end of the support ring should fit with the adjacent ring. When it cannot fit, the limit value of the gap is shown in Table 8. Table 8
>6.3～20
Force, N/mm
5.5.3.3 The end face of the support ring should be ground, and the ground part should not be less than 3/4 of the circumference of the end ring. Burrs and sharp edges are not allowed, and the thickness of the end should not be less than 1/8 of the diameter of the steel wire. The surface roughness parameter R of the ground surface is 6.3μm. When the wire diameter is less than or equal to 0.3mm. and the winding ratio C does not exceed 10, it is allowed not to grind the two end faces. 5.5.3.4 The spring can be chamfered internally (or externally) when necessary, but it must be indicated on the drawing. 5.5.4 For springs with ground end faces, the perpendicularity tolerance of the spring axis to the two end faces in the free state is shown in Table 9. Table 9
0.017H.
Minimum tolerance value 0.5
Force N/mm
>6.3～20
0.012H.
Minimum tolerance value 0.4
Note: When 6>5～10, only the spring is required to be able to stand upright
甲、乙、芮
Minimum tolerance value 0.3
0.0171.
Minimum tolerance value 0.5
5.5.5 When the spring is to be tested for compression height, the value calculated by formula (1) shall be taken as the maximum value and must be indicated on the drawing, Hbnax
Where: dhax
Maximum material diameter (material diameter minus the maximum limit deviation)..
...(1)
5.5.6 The requirements for spring surface treatment shall be indicated in the product drawing as required. When the coating is zinc, chromium and pin, the electroplating layer shall be dehydrogenated.
5.5.7 Other requirements
JB/T3338.1--93
As required, the supply and demand parties may choose the following requirements through negotiation. Strong pressure treatment or heating and strong pressure treatment;
b. Shot peening;
c. Flaw detection;
d. Others.
5.5.8 Other technical requirements not specified in this standard shall be in accordance with the provisions of GB1239.2. 6 Inspection and test methods
6.1 Permanent deformation
The finished spring is compressed three times with the test load or the load specified in the drawing. The difference between the free height after the second and third compressions is not greater than 0.25% of the free height, which is considered to be no permanent deformation. 6.2 Spring characteristics
The spring characteristics should be measured on the corresponding testing machine. Before measurement, it must be compressed once with the test load or the load specified in the drawing. 6.3 Spring diameter
Measure with a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm, and measure the outer diameter or inner diameter according to the drawing. 6.4 Spring free height
Measure the highest point of the spring with a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm. 6.5 The verticality of the spring axis to the support surface at both ends is measured with a flat plate and a wide seat angle ruler. After rotating the spring on the wide seat angle ruler for one circle, rotate it again with another bearing surface sample for one circle for inspection (the second circle adjacent to the end to the 1/2 circle), and use a feeler gauge to measure the maximum deviation between the outer circle of the spring and the angle ruler, which is the verticality. 6.6 The hardness inspection of the spring shall be in accordance with the provisions of GB230. 6.7 The inspection of the depth of the decarburized layer of the spring shall be in accordance with the provisions of GB224. 6.8 The surface quality and shot peening coverage of the spring shall be inspected with a 5-10 times magnifying glass. 7 Inspection rules
7.1 The acceptance sampling inspection of products shall be in accordance with the provisions of GB1239.5. In case of special requirements, it shall be agreed upon by the supply and demand parties. 7.2 The inspection items and defect classification of springs are shown in Table 10. Table 10
A Defect Item
Decarburization, Hardness
B Defect Item
Verticality, Permanent Deformation, Outer (Inner) Diameter, End Ring Gap, Burr 2 Decarburization, Hardness Outer (Inner) Diameter, Permanent Deformation, Burr Decarburization, Hardness
Decarburization, Hardness
Decarburization, Hardness
Load, Outer (Inner) Diameter, Burr
Load, Outer (Inner) Diameter, Press Height, Burr Stiffness, Outer (Inner) Diameter , burr
C Defect Items
Load, free height, end surface roughness, surface defect Load, free height, verticality, end ring gap, end surface roughness, surface defect
Verticality, end surface roughness, surface defect Surface defect, verticality, end surface roughness Free height, verticality, end ring gap, surface defect Note: When there are special requirements, the fatigue test of Class B and Class C springs can be checked as A defect items after consultation between the supply and demand parties. 8 Packaging, marking, transportation, storage
According to the provisions of Chapter 7 of GB1239.2.
A1 Class A spring working drawing, see Figure A1. (P)
JB/T3338.1—93
Appendix A
Hydraulic spring working drawing
(reference part)
Class A group spring working conditions and design calculation data serial number
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns n1.
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Both ends are chamfered inside (outside), and burrs are removed
6. Verticality tolerance mm.
7. Surface anti-corrosion treatment.
8. The rest is in accordance with JB/T3338.1--93.
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Title bar
A2 Class B spring T. Make a drawing, see Figure A2. (P)
JB/T3338.1-93
Class B group spring working conditions and design calculation data serial number
Technical requirements
1: Direction of rotation.
2. Number of valid drawings n.
3. Total number n
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Inside (outside) corners of both ends, remove burrs. 6. Verticality tolerance mm.
? . Surface anti-corrosion treatment.
8. The rest is in accordance with JB/3338.1-93.
Title bar
A3 Class C spring working drawing, see Figure A3. (P.)
JB/T 3338.1—93
Other academic
Working conditions and design calculation data of spring group
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns m.
4. Tighten and grind the two ends, with the grinding surface not less than 270°. 5. Invert the inside (outside) of the two end surfaces and remove burrs. 6. Verticality tolerance mm.
7. Stiffness P\.
8. Surface anti-corrosion treatment.
9. Others are in accordance with JB/T3338.1-93.
1fa mx
Title bar
Additional instructions:
JB/T3338.1-93
This standard is proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry and Hangzhou Spring Factory. The main drafters of this standard are Yu Lixian, Jiang Ying, Lu Peigen, Qin Xinping and Zhou Qingxiong. 3626 The requirements for the surface treatment of the spring shall be indicated in the product drawings as required. When the coating is zinc, chromium and pin, the electroplating layer shall be dehydrogenated.
5.5.7 Other requirements
JB/T3338.1--93
As required, the supply and demand parties may choose the following requirements through negotiation. a. Strong pressure treatment or heating strong pressure treatment;
b. Shot peening;
c. Flaw detection inspection;
d. Others.
5.5.8 Other technical requirements not specified in this standard shall be in accordance with the provisions of GB1239.2. 6 Inspection and test methods
6.1 Permanent deformation
The finished spring shall be compressed three times with the test load or the load specified in the drawing. Measure the free height after the second and third compressions. If the difference is not greater than 0.25% of the free height, it is considered that there is no permanent deformation. 6.2 Spring characteristics
The measurement of spring characteristics should be carried out on the corresponding testing machine. Before measurement, it must be compressed once with the test load or the load specified in the drawing. 6.3 Spring diameter
Use a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm to measure the outer diameter or inner diameter according to the drawing. 6.4 Spring free height
Use a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm to measure the highest point of the spring. 6.5 The verticality of the spring axis to the supporting surfaces at both ends is measured with a flat plate and a wide seat angle ruler. After rotating the spring on the wide seat angle ruler for one week, use another supporting surface sample to rotate one week for inspection (the second circle adjacent to the end to the 1/2 circle), and use a feeler gauge to measure the maximum deviation between the outer circle of the spring and the angle ruler, which is the verticality. 6.6 Spring hardness inspection shall comply with the provisions of GB230. 6.7 Spring decarburization layer depth inspection shall comply with the provisions of GB224. 6.8 The surface quality and shot peening coverage of the spring shall be inspected with a 5-10 times magnifying glass. 7 Inspection rules
7.1 The acceptance sampling inspection of products shall be in accordance with the provisions of GB1239.5. Special requirements shall be agreed upon by the supply and demand parties. 7.2 Spring inspection items and defect classification are shown in Table 10. Table 10
A Defect items
Decarburization, hardness
B Defect items
Verticality, permanent deformation, outer (inner) diameter, end ring clearance, burr 2 Decarburization, hardness outer (inner) diameter, permanent deformation, burr Decarburization, hardness
Decarburization, hardness
Decarburization, hardness
Load, outer (inner) diameter, burr
Load, outer (inner) diameter, press height, burr stiffness, outer (inner) diameter , burr
C Defect Items
Load, free height, end surface roughness, surface defect Load, free height, verticality, end ring gap, end surface roughness, surface defect
Verticality, end surface roughness, surface defect Surface defect, verticality, end surface roughness Free height, verticality, end ring gap, surface defect Note: When there are special requirements, the fatigue test of Class B and Class C springs can be checked as A defect items after consultation between the supply and demand parties. 8 Packaging, marking, transportation, storage
According to the provisions of Chapter 7 of GB1239.2.
A1 Class A spring working drawing, see Figure A1. (P)
JB/T3338.1—93
Appendix A
Hydraulic spring working drawing
(reference part)
Class A group spring working conditions and design calculation data serial number
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns n1.
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Both ends are chamfered inside (outside), and burrs are removed
6. Verticality tolerance mm.
7. Surface anti-corrosion treatment.
8. The rest is in accordance with JB/T3338.1--93.
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Title bar
A2 Class B spring T. Make a drawing, see Figure A2. (P)
JB/T3338.1-93
Class B group spring working conditions and design calculation data serial number
Technical requirements
1: Direction of rotation.
2. Number of valid drawings n.
3. Total number n
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Inside (outside) corners of both ends, remove burrs. 6. Verticality tolerance mm.
? . Surface anti-corrosion treatment.
8. The rest is in accordance with JB/3338.1-93.
Title bar
A3 Class C spring working drawing, see Figure A3. (P.)
JB/T 3338.1—93
Other academic
Working conditions and design calculation data of spring group
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns m.
4. Tighten and grind the two ends, with the grinding surface not less than 270°. 5. Invert the inside (outside) of the two end surfaces and remove burrs. 6. Verticality tolerance mm.
7. Stiffness P\.
8. Surface anti-corrosion treatment.
9. Others are in accordance with JB/T3338.1-93.
1fa mx
Title bar
Additional instructions:
JB/T3338.1-93
This standard is proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry and Hangzhou Spring Factory. The main drafters of this standard are Yu Lixian, Jiang Ying, Lu Peigen, Qin Xinping and Zhou Qingxiong. 3626 The requirements for the surface treatment of the spring shall be indicated in the product drawings as required. When the coating is zinc, chromium and pin, the electroplating layer shall be dehydrogenated.
5.5.7 Other requirements
JB/T3338.1--93
As required, the supply and demand parties may choose the following requirements through negotiation. a. Strong pressure treatment or heating strong pressure treatment;
b. Shot peening;
c. Flaw detection inspection;
d. Others.
5.5.8 Other technical requirements not specified in this standard shall be in accordance with the provisions of GB1239.2. 6 Inspection and test methods
6.1 Permanent deformation
The finished spring shall be compressed three times with the test load or the load specified in the drawing. Measure the free height after the second and third compressions. If the difference is not greater than 0.25% of the free height, it is considered that there is no permanent deformation. 6.2 Spring characteristics
The measurement of spring characteristics should be carried out on the corresponding testing machine. Before measurement, it must be compressed once with the test load or the load specified in the drawing. 6.3 Spring diameter
Use a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm to measure the outer diameter or inner diameter according to the drawing. 6.4 Spring free height
Use a vernier caliper or special measuring tool with a graduation value of not less than 0.02mm to measure the highest point of the spring. 6.5 The verticality of the spring axis to the supporting surfaces at both ends is measured with a flat plate and a wide seat angle ruler. After rotating the spring on the wide seat angle ruler for one week, use another supporting surface sample to rotate one week for inspection (the second circle adjacent to the end to the 1/2 circle), and use a feeler gauge to measure the maximum deviation between the outer circle of the spring and the angle ruler, which is the verticality. 6.6 Spring hardness inspection shall comply with the provisions of GB230. 6.7 Spring decarburization layer depth inspection shall comply with the provisions of GB224. 6.8 The surface quality and shot peening coverage of the spring shall be inspected with a 5-10 times magnifying glass. 7 Inspection rules
7.1 The acceptance sampling inspection of products shall be in accordance with the provisions of GB1239.5. Special requirements shall be agreed upon by the supply and demand parties. 7.2 Spring inspection items and defect classification are shown in Table 10. Table 10
A Defect items
Decarburization, hardness
B Defect items
Verticality, permanent deformation, outer (inner) diameter, end ring clearance, burr 2 Decarburization, hardness outer (inner) diameter, permanent deformation, burr Decarburization, hardness
Decarburization, hardness
Decarburization, hardness
Load, outer (inner) diameter, burr
Load, outer (inner) diameter, press height, burr stiffness, outer (inner) diameter , burr
C Defect Items
Load, free height, end surface roughness, surface defect Load, free height, verticality, end ring gap, end surface roughness, surface defect
Verticality, end surface roughness, surface defect Surface defect, verticality, end surface roughness Free height, verticality, end ring gap, surface defect Note: When there are special requirements, the fatigue test of Class B and Class C springs can be checked as A defect items after consultation between the supply and demand parties. 8 Packaging, marking, transportation, storage
According to the provisions of Chapter 7 of GB1239.2.
A1 Class A spring working drawing, see Figure A1. (P)
JB/T3338.1—93
Appendix A
Hydraulic spring working drawing
(reference part)
Class A group spring working conditions and design calculation data serial number
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns n1.
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Both ends are chamfered inside (outside), and burrs are removed
6. Verticality tolerance mm.
7. Surface anti-corrosion treatment.
8. The rest is in accordance with JB/T3338.1--93.
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Title bar
A2 Class B spring T. Make a drawing, see Figure A2. (P)
JB/T3338.1-93
Class B group spring working conditions and design calculation data serial number
Technical requirements
1: Direction of rotation.
2. Number of valid drawings n.
3. Total number n
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Inside (outside) corners of both ends, remove burrs. 6. Verticality tolerance mm.
? . Surface anti-corrosion treatment.
8. The rest is in accordance with JB/3338.1-93.
Title bar
A3 Class C spring working drawing, see Figure A3. (P.)
JB/T 3338.1—93
Other academic
Working conditions and design calculation data of spring group
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns m.
4. Tighten and grind the two ends, with the grinding surface not less than 270°. 5. Invert the inside (outside) of the two end surfaces and remove burrs. 6. Verticality tolerance mm.
7. Stiffness P\.
8. Surface anti-corrosion treatment.
9. Others are in accordance with JB/T3338.1-93.
1fa mx
Title barbzxz.net
Additional instructions:
JB/T3338.1-93
This standard is proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry and Hangzhou Spring Factory. The main drafters of this standard are Yu Lixian, Jiang Ying, Lu Peigen, Qin Xinping and Zhou Qingxiong. 3621—93
Appendix A
Hydraulic spring working drawing
(reference part)
Class A group spring working conditions and design calculation data serial number
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns n1.
4. Both ends are tightened and ground flat, the grinding surface is not less than 270°5. Both ends are chamfered inside (outside), deburred
6. Verticality tolerance mm.
7. Surface anti-corrosion treatment.
8. The rest is in accordance with JB/T3338.1--93.
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Title bar
A2 Class B spring T. Make a drawing, see Figure A2. (P)
JB/T3338.1-93
Class B group spring working conditions and design calculation data serial number
Technical requirements
1: Direction of rotation.
2. Number of valid drawings n.
3. Total number n
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Inside (outside) corners of both ends, remove burrs. 6. Verticality tolerance mm.
? . Surface anti-corrosion treatment.
8. The rest is in accordance with JB/3338.1-93.
Title bar
A3 Class C spring working drawing, see Figure A3. (P.)
JB/T 3338.1—93
Other academic
Working conditions and design calculation data of spring group
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns m.
4. Tighten and grind the two ends, with the grinding surface not less than 270°. 5. Invert the inside (outside) of the two end surfaces and remove burrs. 6. Verticality tolerance mm.
7. Stiffness P\.
8. Surface anti-corrosion treatment.
9. Others are in accordance with JB/T3338.1-93.
1fa mx
Title bar
Additional instructions:
JB/T3338.1-93
This standard is proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry and Hangzhou Spring Factory. The main drafters of this standard are Yu Lixian, Jiang Ying, Lu Peigen, Qin Xinping and Zhou Qingxiong. 3621—93
Appendix A
Hydraulic spring working drawing
(reference part)
Class A group spring working conditions and design calculation data serial number
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns n1.
4. Both ends are tightened and ground flat, the grinding surface is not less than 270°5. Both ends are chamfered inside (outside), deburred
6. Verticality tolerance mm.
7. Surface anti-corrosion treatment.
8. The rest is in accordance with JB/T3338.1--93.
Hi max
Title bar
A2 Class B spring T. Make a drawing, see Figure A2. (P)
JB/T3338.1-93
Class B group spring working conditions and design calculation data serial number
Technical requirements
1: Direction of rotation.
2. Number of valid drawings n.
3. Total number n
4. Both ends are tightened and ground flat, and the grinding surface is not less than 270°5. Inside (outside) corners of both ends, remove burrs. 6. Verticality tolerance mm.
? . Surface anti-corrosion treatment.
8. The rest is in accordance with JB/3338.1-93.
Title bar
A3 Class C spring working drawing, see Figure A3. (P.)
JB/T 3338.1—93
Other academic
Working conditions and design calculation data of spring group
Technical requirements
1. Direction of rotation.
2. Effective number of turns n.
3. Total number of turns m.
4. Tighten and grind the two ends, with the grinding surface not less than 270°. 5. Invert the inside (outside) of the two end surfaces and remove burrs. 6. Verticality tolerance mm.
7. Stiffness P\.
8. Surface anti-corrosion treatment.
9. Others are in accordance with JB/T3338.1-93.
1fa mx
Title bar
Additional instructions:
JB/T3338.1-93
This standard is proposed and managed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry and Hangzhou Spring Factory. The main drafters of this standard are Yu Lixian, Jiang Ying, Lu Peigen, Qin Xinping and Zhou Qingxiong. 362
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