Some standard content:
ICS91.220
Construction Industry Standard of the People's Republic of China JG/T 145—2002
Sleeve squeezing machine for rebars
Sleeve squeezing machine for rebars2002-11-09 Issued
Issued by the Ministry of Construction of the People's Republic of China
Implemented on 2003-01-01
JG/T145
Since 1987, the sleeve squeezing connection technology of ribbed steel bars has been widely promoted and applied in domestic civil engineering, bridges, water conservancy, power and other projects. In order to better promote the development of this technology and ensure production quality and operation safety, this standard is specially formulated. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Beijing Construction Machinery Research Institute, the technical unit responsible for mechanical equipment and vehicle standards of the Ministry of Construction. The responsible drafting unit of this standard: China Academy of Building Research Building Mechanization Research Branch The participating drafting units of this standard: Dezhou Zhouli Hydraulic Machinery Co., Ltd., Metallurgical Ministry Building Research Institute, Gaobeidian Dongliang Industrial Co., Ltd.
The main drafters of this standard: Liu Zijin, Zhao Hongxue, Xiao Fei, Wang Aijun, Qian Guanlong, Lu Zheng. This standard is interpreted by the China Academy of Building Research Building Mechanization Research Branch. I
1 Scope
Construction Industry Standard of the People's Republic of China Steel Sleeve Squeezing Machine
Sleeve squeezing machinefor rebarsJG/T145—2002
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, storage and transportation of steel sleeve squeezing machines (hereinafter referred to as squeezing machines).
This standard applies to steel sleeve squeezing machines used for cold extrusion connection of ribbed steel sleeves. Cited standards
The clauses contained in the following standards constitute the clauses 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/T1499—1998
GB/T3766—2001
GB/T7935—1987bzxz.net
Hot-rolled ribbed steel bars for reinforced concrete (neqISO6935-2:1991)General technical conditions for hydraulic systems
General technical conditions for hydraulic components
Residual heat treated steel bars for reinforced concrete
GB/T13014—1991
GB/T14048.1—1993General principles for low-voltage switchgear and controlgear (eqvIEC947:1988)JG/T5011.12—19 923
General technical conditions for painting of construction machinery and equipment JG/T5012—1992
JG/T5050—1994
General technical conditions for packaging of construction machinery and equipment General rules for reliability assessment of construction machinery and equipment JG/T5079.2—1996
JG/T5082.1—1996
Methods for measuring noise of construction machinery and equipment
General technical conditions for welded parts of construction machinery and equipment JGJ108—1996
Technical specification for sleeve extrusion connection of ribbed steel bars 3 Definitions
This standard adopts the following definitions.
3.1 Sleeve queezing machine for rebars Special equipment used to extrude and deform special steel sleeves to make the steel bars and steel sleeves bite and connect into one. 2Radial steel sleeve extrusion machine sleeveradialsqueezingmachineforrebars3.2
Extrusion machine for radial extrusion of sleeve.
3.3Axial steel sleeve extrusion machine sleeveaxial squeezingmachineforrebarsExtrusion machine for axial extrusion of sleeve.
3.4Sleeve queezed couplersforrebarsThe joint formed by plastic deformation of connecting steel sleeve and tight engagement with ribbed steel bars through extrusion force. 3.5
Pumping station pumpingstation
The power source of the extrusion machine is generally composed of an electric motor, a hydraulic pump, a valve, an oil tank, etc. Crimper
squeezer
Approved by the Ministry of Construction of the People's Republic of China on November 9, 2002 and implemented on January 1, 2003
JG/T145—2002
Actuator of an extruder, used for crimping steel sleeves. 3.7 Squeezedies
Special dies installed on the crimper for extruding steel sleeves. 3.8 Maximum diameter of rebars for machine
MaximaldiameterofrebarsformachineThe nominal diameter of the largest rebar that can be squeezed and connected by the extruder. 4 Classification
4.1 Main parameters
The main parameter of the extruder is the maximum diameter of the rebar. The main parameter series is 25, 32, 40, 50mm. 2 Model and marking
The model of the extruder consists of the type group code, characteristic code, main parameter code and update and variant code, OOAD
Update and variant code: In uppercase printed Chinese phonetic alphabetical order Main parameter code: Maximum processed steel bar diameter, mm Characteristic code: J—Radial
Z—Axial
Type group code: GJ—Rebar extruder
4.3 Marking example:
a) The maximum processed steel bar diameter that can be extruded and connected is 32mm radial The steel sleeve extruder is marked as: extruder GJJ32JG/T145
b) The second variant of the axial steel sleeve extruder with a maximum processing steel bar diameter of 40mm that can be extruded and connected is marked as:
Extruder GJZ40BJG/T145
5 Technical requirements
General requirements
5.1.1 The working ground should be solid and flat, and the ground should not sink during the operation; the power supply should meet the requirements of the whole machine for the power supply, and the voltage fluctuation should not exceed ±10%.
5.1.2 The extruder should be manufactured according to the product drawings and technical documents approved by the prescribed procedures. 5.1.3
All standard parts, purchased parts, and outsourced parts should have certificates of conformity, and random inspections should be carried out when necessary. They can only be used after they are confirmed to be qualified. All parts and components should be inspected and used after they are confirmed to be qualified. The connection of parts and components should be reliable.
Parts of the same model of products from the same manufacturer should be interchangeable. The quality of the main welds should meet the requirements of JG/T5082.1. The length, width and height dimensional errors of the extruder shape should not be greater than 2% of the design value. The overall mass error of the extruder should not be greater than 5% of the design value. 5.1.10 The operating device should be convenient, flexible and reliable. 5.2 Electrical system
The motor should comply with the provisions of the current national standards. The performance of electrical components should comply with the relevant provisions of GB/T14048.1. Electrical components should be arranged neatly and connected firmly. JG/T145—2002
5.2.4 The insulation resistance between the live parts of the extruder and the protective grounding circuit should not be less than 1M25.2.5 All non-conductor metals should be grounded, and the grounding resistance should not be greater than 42. When the wire passes through a metal hole, there should be an insulating protective sleeve or other protective measures.
5.2.6 The electrical system should have waterproof measures. 5.3 Working performance
5.3.1 Each mechanism should work smoothly, and there should be no pump station suction, oil cylinder creeping and abnormal noise. 5.3.2 The extruder should comply with the relevant provisions of JGJ108. 5.3.3 The ear noise of the extruder should not be greater than 71dB (A) when it is unloaded, and the ear noise should not be greater than 80dB (A) when it is working. 5.4 Hydraulic system
5.4.1 The hydraulic system should comply with the relevant requirements of GB/T3766. 5.4.2 The set pressure of the hydraulic system overflow valve should not exceed 1.1 times the rated working pressure of the system, and the rated working pressure of the system should not be greater than the rated working pressure of the pump station.
5.4.3 The hydraulic pipelines should be arranged neatly, and there should be no seepage or oil leakage in the system. 5.4.4 The hydraulic components of the hydraulic system should comply with the relevant requirements of GB/T7935. 5.4.5 The flow error at the rated working pressure of the pump station shall not exceed 10% of the rated flow. 5.4.6 When the pump station stops for 30 seconds at the rated working pressure of the system, the pressure drop value shall not exceed 20%. 5.5 Safety performance
5.5.1 The hydraulic system shall be equipped with an overflow valve. 5.5.2 The mold shall be equipped with a protective device to prevent popping out and falling. 5.6 Reliability
Reliability assessment shall comply with the provisions of JG/T5050. 5.6.1 The reliability test time of the extruder shall not be less than 200h. 5.6.2 The average trouble-free working time of the extruder shall not be less than 60h. 5.6.3 The reliability of the extruder shall not be less than 90%. 5.7 Appearance quality of the whole machine
5.7.1 Painting shall comply with the requirements of JG/T5011.12 5.7.2 The metal surface shall have necessary anti-rust treatment; the surface of the casting shall be smooth and flat. 5.7.3 The product label shall have clear handwriting, without scratches or paint peeling; the installation shall be firm and correct. 6 Test method
6.1 Test conditions
6.1.1 The test environment temperature shall be between (-20~+40)℃, and the relative humidity of the air shall not exceed 90% (temperature is 20℃). 6.1.2 The power supply for the test shall meet the requirements of the whole machine for the power supply. 6.1.3 The steel bars for the test shall meet the requirements of GB/T1499 or GB/T13014. 6.1.4 The accuracy of the instruments, meters, measuring tools, etc. used in the test shall be within the calibration period, and the same instruments and tools shall be used during the test. 6.2 Measurement of whole machine parameters and appearance quality inspection 6.2.1 Measure the appearance and quality of the whole machine, and record the results in Appendix A (Appendix to the standard) Table A1. 6.2.2 Visually inspect the appearance quality of the whole machine, and record the results in Table A1. 6.3 Electrical system safety test
6.3.1 Insulation resistance measurement: Use a 500V megohmmeter to measure the insulation resistance between the live part and the protective grounding circuit 6.3.2 Grounding resistance measurement: Cut off the power supply and randomly select measuring points on the accessible metal parts. Connect the measuring points and grounding terminals to the regulated current power supply (JWL-30 or equivalent power supply) with wires (resistance R) respectively. Turn on the regulated current power supply, adjust the current to 25A and read the voltage value V. Calculate the grounding resistance value according to formula (1) and record the result in Table A2.3
Where: R—grounding resistance value, 2;
JG/T145—2002
R=V/25-R
V——voltage value read when the current is adjusted to 25A, V; R1—connecting wire resistance value, 2.
6.4 Hydraulic system test
6.4.1 Measure the flow rate of the pump station at the rated working pressure of the pump station for three times and record the results in Table A3. .(1)
6.4.2 Install the oil plug at the pump station end at the interface between the pump station and the high-pressure hose, then start the machine, close the unloading valve, stop the machine for 30 seconds at the system rated working pressure, observe the pressure drop, measure three times, and record the measurement results in Table A3.6.4.3 Connect the crimper to the pump station firmly, and after starting the machine, increase the pressure to 1.1 times the system rated working pressure, repeat 10 times, observe whether there is seepage or oil leakage at all places, and record the results in Table A3.6.5 No-load test
Measure the input voltage, current, power, motor output speed and other parameters of the extruder in the no-load state, and record the results in Table A4.6.6 Load test
Measure the input voltage, current, power, motor output speed and other parameters of the extruder at the system rated working pressure, and record the results in Table A5.
6.7 Noise test
6.7.1 Measurement requirements:
a) There shall be no large vibration and interference within 10m around the prototype; b) The measuring point shall be 1.5m above the ground and 1.0m from the prototype in the horizontal direction; c) No less than 4 points shall be selected around the prototype for measurement; d) Others shall be in accordance with JG/T5079.2.
6.7.2 Measurement conditions: no load, rated working pressure of the system 6.7.3 The measurement results shall be recorded in Table A6.
6.8 Reliability test
6.8.1 The reliability test of the extruder can be assessed at the construction site, that is, the reliability assessment test can be conducted on site under the supervision of a dedicated person under specified conditions, or it can be assessed under laboratory conditions. 6.8.2 During the reliability test, it is allowed to replace wearing parts such as high-pressure hoses according to normal maintenance regulations, and no faults are listed. However, the maintenance situation must be recorded in detail, and the faults must be eliminated immediately. The fault situation and elimination time must be recorded. It is not allowed to test with faults and adjust the whole machine without reason.
6.8.3 When the extruder performs extrusion operation, the processing quantity per hour shall not be less than 10, and each timing period shall not be less than 1 hour; the reliability assessment time is the cumulative total of 200 hours in the timing period.
6.8.4 According to the degree of impact on personal safety, the degree of damage to parts and components, the degree of impact on the performance of the whole machine, and the difficulty of repair, the faults are divided into:
a) Fatal fault: Under normal operation, the structure or components are damaged, which may cause casualties, b) Serious fault: Under normal operation, the structure or components are damaged, resulting in serious damage to the equipment. c) General faults: Under normal operating conditions, the performance of the whole machine has been affected and the machine must be shut down for inspection and maintenance. Generally, only the tools provided with the machine are used for replacement or repair, and the repair time does not exceed 2 hours. d) Minor faults: Faults caused by loose fasteners and pipe joints, improper adjustments, and insufficient maintenance, etc., and the repair time does not exceed 30 minutes.
6.8.5 According to the fault classification, the fault criticality coefficient is used to count the number of faults. The fault criticality coefficient is shown in Table 1. 4
Fault category
Fault name
Fatal fault
Serious fault
General fault
Minor fault
JG/T145—2002
Table 1 Examples of fault criticality coefficients for steel sleeve extruders
Loss of insulation performance of the electrical system, deformation of the machine body, cracking of the crimper, burning of the motor, crushing of the die, damage to the pump station, burning of electrical components that are difficult to repair, insufficient pressure or flow of the pump station, loosening of general connectors that are easy to repair, seepage and oil leakage of joints The mean trouble-free working time is calculated according to formula (2): MTBF=to
Where: MTBF
Mean trouble-free working time, h;
Cumulative working time, h.
Failure criticality coefficient.
.····..··.·(2)
For the convenience of calculation, the cumulative working time is counted according to the number of joints processed by the extruder, and calculated according to formula (3): to
Wherein: m
The number of steel bar specifications used in the test;
Cn:/p:
The total number of joints connected for each specification of steel bar, pieces; The number of joints required to be connected per hour for each specification of steel bar, pieces; See Table 2. Table 2
Main parameter series/mm
Number of joints connected per hour by the extruder
Steel bar diameter/mm
The equivalent number of failures occurring during the specified reliability test should be calculated according to formula (4): rh
Wherein k;
The number of times the i-th type of failure occurs;
The criticality coefficient of the i-th type of failure.
When r<1, let r=1.
The reliability of the extruder is calculated according to formula (5): R=
Where: R
Reliability;
The total time for the extruder to repair the fault, h. to and tl do not include normal maintenance time. The test results are recorded in Table A7.
Inspection rules
Inspection classification
Inspection is divided into type inspection and factory inspection.
（3）
...........(4)
（5）
7.2 Type inspection
JG/T145—2002
7.2.1 Type inspection shall be carried out in any of the following cases: a) Finalization and identification of new products;
b) After formal production, if there are major changes in structure, materials, and processes that affect product performance; c) When the product is discontinued for more than two years and production is resumed; d) When the national quality supervision department makes a request. 7.2.2 Type inspection items are shown in Table 3.
7.2.3 The random single sampling method is adopted, the number of samples is two, and the sampling base is not limited. 7.2.4 The judgment rules are as follows:
a) The appearance inspection in Table 3 allows for trimming;
b) If one item in the reliability test is unqualified, it is judged as unqualified; c) If one of the remaining inspection items is unqualified, it is allowed to double the sampling of the item. If it is still unqualified, it is judged as unqualified. : Factory inspection
Before leaving the factory, the extruder shall be inspected by the product quality inspection department according to the factory inspection requirements one by one, and the extruder shall be shipped only after the inspection is qualified and the certificate of conformity is issued. The factory inspection items are shown in Table 3.
Factory inspection allows adjustment of the inspection items, and the extruder shall be shipped only after all items are qualified. Table 3 Inspection items
Inspection items
Measurement of machine parameters and appearance quality inspection
Electrical system safety test
Hydraulic system test
No-load test
Load test
Noise test
Reliability test
Inspection method
Judgment basis
5.1.8, 5.1.9, 5.7
5.2.4, 5.2.5
Note: During factory inspection, only the appearance quality of the whole machine and the insulation resistance of the protective grounding circuit are inspected. 8
Marking, packaging, storage and transportation
8.1 Marking
Type inspection
The label and trademark of the extruder should be clear and permanently fixed in a conspicuous position. The label should record the following contents: a) Manufacturer name;
b) Product name and model;
c) Product main parameters;
d) Whole machine quality;
e) Factory number;
f) Factory date.
8.2 Packaging
The packaging should comply with the provisions of JG/T5012.
8.3 Storage and transportation
8.3.1 The extruder should be stored in an environment without rain and corrosion. 2 After long-term out of use (more than six months), it should be inspected, repaired and maintained according to the instruction manual before use. 8.3.2
3 When transported out of the factory, it should be placed horizontally.
Factory inspection
Test location
Test personnel
Appearance quality
Test location
Test personnel
Test location
Test personnel
Conclusion:
Pressure drop value
Seepage and oil leakage
JG/T145—2002
(Appendix of the standard)
Extrusion press test record sheet
Machine parameter measurement and appearance quality inspection record sheet Factory number
Recording personnel
Measured value
Design value
Table A2 Electrical system safety test
Factory number
Recording person Personnel
Insulation resistance
Wire resistance R1
Voltage value V at 25A
Ground resistance R
Hydraulic system test record
Factory number
Recording personnel
Measured value
Test date
Test instrument
Test date
Test instrument
Test date
Test instrument
No oil filling
Average value
Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed||tt| |Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed
JG/T145—2002
No-load test record sheet
Factory number
Recording personnel
Load test record sheet
Factory number
Recording personnel
Measured value
Measured value
Test date
Test instrument
Average value
Test date
Test instrument
Average value
Test location
Test personnel
Background noise
Maximum value
Average value
Conclusion:
Test location
Test personnel
Fault content
Conclusion:
Fault nature
JG/T145—2002
Noise test record sheet
Factory number
Recording personnel
Fault criticality coefficient
Repair time/h
Test date
Test instrument
Test date
Test instrument
Operation time/h2
3When transported out of the factory, it should be placed horizontally.
Factory inspection
Test location
Test personnel
Appearance quality
Test location
Test personnel
Test location
Test personnel
Conclusion:
Pressure drop value
Seepage and oil leakage
JG/T145—2002
(Appendix of the standard)
Extrusion press test record sheet
Complete machine parameter measurement and appearance quality inspection record sheet Factory number
Recording personnel
Measured value
Design value
Table A2 Electrical system safety test
Factory number
Recording person Personnel
Insulation resistance
Wire resistance R1
Voltage value V at 25A
Ground resistance R
Hydraulic system test record
Factory number
Recording personnel
Measured value
Test date
Test instrument
Test date
Test instrument
Test date
Test instrument
No oil filling
Average value
Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed||tt| |Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed
JG/T145—2002
No-load test record sheet
Factory number
Recording personnel
Load test record sheet
Factory number
Recording personnel
Measured value
Measured value
Test date
Test instrument
Average value
Test date
Test instrument
Average value
Test location
Test personnel
Background noise
Maximum value
Average value
Conclusion:
Test location
Test personnel
Fault content
Conclusion:
Fault nature
JG/T145—2002
Noise test record sheet
Factory number
Recording personnel
Fault criticality coefficient
Repair time/h
Test date
Test instrument
Test date
Test instrument
Operation time/h2
3When transported out of the factory, it should be placed horizontally.
Factory inspection
Test location
Test personnel
Appearance quality
Test location
Test personnel
Test location
Test personnel
Conclusion:
Pressure drop value
Seepage and oil leakage
JG/T145—2002
(Appendix of the standard)
Extrusion press test record sheet
Complete machine parameter measurement and appearance quality inspection record sheet Factory number
Recording personnel
Measured value
Design value
Table A2 Electrical system safety test
Factory number
Recording person Personnel
Insulation resistance
Wire resistance R1
Voltage value V at 25A
Ground resistance R
Hydraulic system test record
Factory number
Recording personnel
Measured value
Test date
Test instrument
Test date
Test instrument
Test date
Test instrument
No oil filling
Average value
Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed||tt| |Test location
Test personnel
Test items
Input voltage
Input current
Input power
Motor output speed
JG/T145—2002
No-load test record sheet
Factory number
Recording personnel
Load test record sheet
Factory number
Recording personnel
Measured value
Measured value
Test date
Test instrument
Average value
Test date
Test instrument
Average value
Test location
Test personnel
Background noise
Maximum value
Average value
Conclusion:
Test location
Test personnel
Fault content
Conclusion:
Fault nature
JG/T145—2002
Noise test record sheet
Factory number
Recording personnel
Fault criticality coefficient
Repair time/h
Test date
Test instrument
Test date
Test instrument
Operation time/h
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