This standard specifies the technical requirements, inspection methods, inspection rules and marking, packaging, transportation, storage, etc. of cylinders. This standard applies to double-acting, piston-type ordinary cylinders (referred to as cylinders) with a bore of 6 to 400 mm that use compressed air as the working medium and are used in pneumatic transmission systems. JB/T 5923-1997 Technical conditions of pneumatic cylinder JB/T5923-1997 Standard download and decompression password: www.bzxz.net

J20 | |tt | | JB | | tt | tt||Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1998-01-01
JB/T5923-1997
Previous
Words|| tt||This standard is not equivalent to the Japanese standard JISB8377-1991 Cylinder, and is merged and revised with JB/T5923-91 & Cylinder Test Methods.
This standard will replace JB/T5923 from the date of entry into force. 91. This standard is proposed and administered by the National Wave Pressure and Pneumatic Standards Committee. The main drafting unit of this standard: Guangdong Caoqing Fangqi Dynamics Co., Ltd. The organization participating in the drafting of this standard: Yantai Pneumatic Components Factory. The main drafters of this standard: Wu Enquan and Mou Wenlong. 1 Scope
Machinery Industry Standard of the People's Republic of China
Pneumatic cylinder technical conditions
JB/T 59231997
Deputy Police JB/T5923-91
This standard It stipulates the technical requirements, inspection methods, inspection rules and marking, packaging, transportation, storage, etc. of the cylinder. This standard applies to double-acting, piston-type ordinary cylinders (referred to as cylinders) with a bore of 6 to 400 mm that use compressed air as the working medium and are used in pneumatic transmission systems.
2Definitions
This standard adopts the following definitions.
2.1 Starting Yuli
The pressure that causes the cylinder piston to start and continue its full stroke operation. 2.2 Minimum working pressure
can ensure the minimum pressure required for the normal operation of the cylinder. 2.3 No-load state
The working state when the cylinder does not carry any external load. 2.4 Internal leakage in the piston
Leakage between the cylinder inner surface and the piston outer surface. 2.5 External leakage from the piston rod
Leakage lag between the piston rod and the cylinder end cover guide bushing. 2.6 Steady-state conditions
allows recording the variation range of test parameter measurement values. 3 Technical requirements
3.1 Working conditions
3.1.1 Nominal pressure 0.63, (0.8), 1.0MPa. 3.1.2 See Table 1 for the minimum working pressure.
Table 1 Minimum working pressure
Rainbow diameter
Minimum working pressure
mm
MPa
6~100
0. 15
3.1.3 Working medium: Compressed air filtered by water removal (oil supply type may contain oil mist). 3.1.4 Ambient temperature and medium temperature are 5~60℃. When the temperature is below 5C, the moisture in the medium requires special treatment. 3.1.5 Piston movement speed v≤500mm/s. 3.2 Technical performance
3.2.1 Starting pressure
Approved by the Ministry of Machinery Industry on 1997-10-05
125~400
0.1
1998-01- 01Implementation
1
JB/T 5923—1997
When the cylinder is in no-load state, its starting pressure should not be higher than that specified in Table 2. Table 2 Starting pressure
RedwwW.bzxz.Net
Diameter
Starting pressure
3.2.2 Load performance
mm
MPa
6~16
0.1
20~25
0. 08
32~100
0.06
125400
0. 05
Add corresponding resistance load to the axial direction of the cylinder piston rod. Its value is equivalent to the percentage of the maximum theoretical output force of the cylinder specified in Table 3. When the piston running speed is about 150mm/s, the piston runs It should be stable and there should be no abnormality in each component. Table 3 Percentage of maximum theoretical output force
cylinder
mm
625
diameter
32~400
maximum theory of cylinder Output force calculation formula:
In the formula: F, the maximum theoretical output force of the rod end without active cold, N; F: the maximum theoretical output force of the piston rod end, N; force
nominal pressure, MPa;
D---cylinder inner diameter, mm (the same below);
d---piston rod diameter, mm (the same below)
3.2.3 Pressure resistance performance||tt| |yuan
D
(Dd)
Percentage of the maximum theoretical output force
%
70
80||tt ||The cylinder is supplied with 1.5 times the nominal pressure, and the pressure is maintained for 1 minute. All components must not be loose, permanently deformed, or have other abnormal phenomena. 3.2.4 Sealing performance
When the cylinder is supplied with nominal pressure and minimum working pressure respectively, the internal leakage of the piston shall not be greater than (3 + 0.15D) cm*/min, and the external leakage of the piston support shall not be greater than (3 + 0.15D) cm*/min. It shall not be greater than (3 + 0.15d) cm\/min, and leakage is not allowed in other parts. 3.2.5 Durability
The durability of the cylinder should comply with the requirements in Table 4.
Table 4 Durability
Stroke
Durability
3.2.6 Appearance
mm
≤60
> 2.5 million times
The appearance of the cylinder should be smooth, flat, even in color, and the surface should be free of defects such as chips, scratches, and bruises. The bare surface of the cylinder should be treated to prevent corrosion (except for corrosion-resistant materials). 2
>60
>300km
4 test
4.1 Test conditions
4.1.1 Quality
JB/T 59231997| |tt||After filtration, the compressed air containing oil mist is removed. The filtration precision is 25~50μm, and the water separation efficiency is not less than 80%. 4.1.2 Environmental conditions
Ambient temperature 5~35℃;
Ambient relative humidity ≤85%,
4.1.3 Measuring instruments and steady-state conditions
4.1. 3.1 The type inspection of measuring instruments
should not be lower than the B-level measurement accuracy level, and the factory inspection should not be lower than the C-level measurement accuracy level. Refer to Table 5. Table 5 Measurement accuracy level
Measuring instrument parameters
Force
Pressure
Temperature
4.1.3.2 Steady-state conditions
%| |tt||%
c
B
±5
±2
±2
Egg measurement accuracy level|| tt||c
±8
±3
When the average indicated value of the controlled parameter changes within the range specified in Table 6, the measured value of the test parameter is allowed to be recorded. Table 6 Temperature and pressure average indication value range
Measurement accuracy level
Change range of theft indication value
Pressure indication change range
4.2 Test method||tt| |4.2.1 Starting pressure
C
%
B
±2
±2
c
± 3
±4
The test circuit can refer to Figure 1. The throttle is fully opened and the cylinder is placed horizontally. After several reciprocating movements, in the no-load state, the pressure is slowly increased from zero pressure until the piston starts to move and can run to the full stroke. This reciprocating test is performed three times, and the given pressure is the starting pressure, and its value should meet the requirements of 3.2.1.
4.2.2 Load performance
The test circuit can refer to Figure 2. Apply the load specified in Table 3 in the axial direction of the piston rod, alternately apply nominal pressure to the air ports at both ends of the cylinder, adjust the exhaust volume so that the average piston speed is about 150mm/s, reciprocate more than three times along the full stroke, and check the operation of the cylinder. Should comply with the provisions of 3.2.2.
3
JB/T5923-1997
1-Air source, 2-Triple piece, 3-way valve, 4-One-way throttle valve; 5-Tested cylinder diagram 1 Principle diagram of the test device system
1-Air source: 2-triple unit; 3-Reversing reading: 4 One-way throttle width, 5-Technical test cylinder; 6-Loading device Figure 2 Test device system Schematic diagram
4.2.3 Pressure resistance performance
The test is conducted under no-load conditions. | |tt |
4.2.4Sealing performance
is carried out under no-load condition after the pressure test. During the test, keep the cylinder in a static state, alternately supply the minimum working pressure and nominal pressure to the air ports at both ends of the cylinder, and check the internal leakage of the piston part and the external leakage of the active cold rod part and other parts respectively. The leakage conditions should comply with 3.2.4 According to regulations,
4.2.5 Durability
Please refer to Figure 2 for the test route.
Apply 50% of the maximum theoretical output force of the cylinder in the axial direction of the piston rod Load, alternately apply nominal pressure to the air ports at both ends of the cylinder under test, adjust the exhaust port flow, so that the average piston speed reaches 200mm/s, and the moving case will reciprocate along the full stroke. The test can be performed continuously or intermittently, and the cumulative stroke After reaching the requirements of 3.2.5, repeat the test of 4.2.1~4.2.4 and the requirements should still be met. 4.2.6 Appearance
The inspection method for the appearance of the cylinder shall be carried out by visual inspection and hand feeling method, and shall comply with the provisions of 3.2.6. 5 Inspection Rules
5.1 Factory Inspection
5.1.1 Each product must pass the inspection by the quality inspection department of the manufacturer before it can be shipped out. 5.1.2 Factory inspection is divided into mandatory inspection items and random inspection items. Required factory inspection items; 3.2.1, 3.2.4, 3.2.6 Factory sampling inspection items: 3.2.3
5.1.3 The sampling quantity of cylinder products shall be 2% of the production volume of each production shift, but shall not be less than Three sets. 5.1.4 Judgment Rules
If there are unqualified items among the randomly inspected products, the items shall be inspected twice. If there are still unqualified items, the items of the batch of products shall be inspected one by one.
5.2 Type test
5.2.1 Cylinder products must pass type inspection before they can be put into mass production. 5.2.2 Type inspection should be carried out for any of the following situations: a) New products under trial production (including old products transferred to factories); b) When its performance may be affected due to improved design, process or change of materials; c ) After one year of suspension of production, when production is resumed.
5.2.3 Sampling and Judgment
The number of sampling inspections for cylinder type inspection is three units (pieces), of which one (piece) is subject to full item inspection, and the remaining two units are only inspected except for durability items. Performance inspection. During the inspection, if there are any unqualified products, the sampling inspection should be doubled. If all are qualified, the hatch type inspection will still be judged as qualified. If there are still unqualified products, the product will be judged as unqualified. 6 Product Marking, Packaging and Storage
6.1 Product Marking
Fix the nameplate at an appropriate position on the product surface. The nameplate should be clear, beautiful, upright and generous. The nameplate should be marked with: a) product name and model;
b) nominal pressure:
c) manufacturer name;
5
d) manufacturing date.
6.2 Packaging
JB/T59231997
The packaging method and method of cylinder products can be determined by the manufacturer in accordance with the regulations of the transportation department or in consultation with the ordering unit, but the product should be ensured in the original package No damage during transportation.
should be marked on the outer surface of the package:
a) manufacturer name;
b) product name and model;
e) quantity:
d) Gross weight and dimensions;
e) Receiving unit and address:
() indicate "Beware of light models", "moisture-proof" and "anti-pressure" and other signs; g) Packing date.
6.3 Random documents
a) Product instruction manual;
b) Factory certificate of conformity.
6.4 Busy Storage
Cylinder products should be stored in a ventilated, dry, and non-corrosive room. 6
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