JB/T 8457-1996 General requirements and test methods for cold extrusion crimping pliers
Some standard content:
Mechanical Industry Standard of the People's Republic of China
General requirements and test methods for cold extrusion crimping pliers 1 Subject content and scope of application
This standard specifies the general requirements and test methods for cold extrusion crimping pliers (hereinafter referred to as crimping pliers). JB/T8457--1996
This standard applies to the crimping pliers used for cold extrusion connection of copper conductors and copper terminals (including bare terminals and pre-insulated terminals) in electrical equipment.
Note: Copper terminals refer to TO type, TU type, TUL type, TC type, TJ type, TZ type, TL type terminals in JB/T2436.1 and JB/T2436.2 standards: TT type and TP type terminals in JB4418; TG type terminals in JB/T6330 standard: and other related terminals. 2 Reference standards
GB1497
GB2828
GB2829
JB2836
JB4261
JB4418
Metal Rockwell hardness test method
Basic standards for low-voltage electrical appliances
Batch inspection, counting sampling procedures and sampling tables, periodic inspection, counting sampling procedures and sampling tables, Basic test methods for electromechanical components for electronic equipment Part 2: General inspection, electrical continuity method, contact resistance test, insulation test and electrical stress test
Electrical engineering The electroplating and chemical covering layers of the product Accessories of switchgear and control equipment Terminology Fan-shaped quick-connect terminals
JB/T2436.1 Copper crimping terminals for wires3
Part 1: Copper crimping terminals for wires with a diameter of 0.5 to 6.0 mm* JB/T2436.2 Copper crimping terminals for wires
JB/T6330
3 Terms
TG1 type tubular terminals
Part 2: Copper crimping terminals for wires with a diameter of 10 to 300 mm2 The terms and definitions used in this standard conform to the provisions of JB4261 standard. 4 Product classification
4.1 Model and meaning
Characteristic code (see Table 1)
Crimp tab width (mm)
Crimping wire cross-section range (mm)
Design serial number
Crimping pliers code
Japanese import
Product standard
Varieties and specifications
Pneumatic
Hydraulic
Electric
For pre-insulated terminals
For tubular terminals
JB/T8457—1996
Manual (or foot-operated) type
The varieties, specifications and extrusion die crimping forms of crimping pliers for flat quick-connect (including sleeves and tabs) terminals refer to Table 2 and are specified by each product standard. Table 2
Manual one-handed crimping pliers
Manual two-handed crimping pliers
Pneumatic crimping pliers
Manual (or foot-operated) hydraulic crimping pliers
Electric mechanical crimping pliers
Electric hydraulic crimping pliers
Technical requirements
Extrusion die
Die form
Replaceable or
Fixed
Crimp form
Pit-press type
Circular press type
Roll press type
Pit-press type
Circular press type
Pit-press type
Circular press type
Roll press type
Pit-press type
Circular press type
Pit-press type
Circular press type
Pit-press type
Circular press type
Width of insert for crimping quick-connect terminals
5.1 Crimping pliers shall be manufactured in accordance with product drawings and design documents approved through prescribed procedures. 5.2 General requirements
5.2.1 All parts of the crimping pliers shall be free from harmful damage, cracks, rust spots and other defects. 5.2.2 The operation of the crimping pliers shall be simple, and the replacement extrusion die shall be easy and reliable to load and unload. 4.8
Crimping wire cross-section range
10~300
The upper and lower extrusion dies of the crimping pliers should be aligned and not misaligned when closed. There should be no obvious shaking between the replaceable extrusion die and the pressure head part, the handle and the pliers body part, and the operation should be stable. When the crimping connection is completed, the jaws should be closed. The jaws of the extrusion die should be finely processed, and no damage or cracks should be caused on the wiring components during the wiring operation. 5.2.4
The crimping pliers that use hydraulic hoses to connect the pressure cylinder part and the pressure head should have connection joints that are easy to load and unload and reliable to connect. 5.2.5
5.2.6The pressure cylinder, pressure head, hydraulic hose and connection joints of the hydraulic crimping pliers should be very reliable to the hydraulic pressure. Electric crimping pliers can use AC power or battery power. When using battery power, they should be equipped with appropriate research electrical appliances. 5.2.7
5.2.8 The crimping pliers shall be provided with a mechanism to confirm the completion of crimping according to the following corresponding clauses:72
JB/T8457—1996
a) Manual one-handed crimping pliers, manual two-handed crimping pliers and electric mechanical crimping pliers shall be provided with a ratchet or similar mechanism. When the extrusion die has not reached the position where the normal crimping connection is completed, the extrusion die cannot be opened and the wiring device cannot be removed from the crimping pliers; b) Hydraulic crimping pliers shall be provided with a pressure limiting mechanism to limit the pressure applied by the extrusion die. When the pressure applied by the extrusion die reaches the required value for the normal crimping connection, the automatic pressure relief valve (safety valve) etc. will be activated and the pressure applied to the extrusion die will be released. Alternatively, a piston rod position indicating mechanism indicating that the crimping connection has been completed is provided on the pressure head; c) Pneumatic crimping pliers, when the pressure applied by the extrusion die reaches the required value for the normal crimping connection, the automatic pressure relief valve (safety valve) etc. will be activated and the pressure applied to the extrusion die will be released. For crimping pliers that are clearly marked as not to be used at pressures higher than the set pressure, the restriction mechanism may not be provided.
5.2.9 The crimping pliers shall be marked with durable and clear model, manufacturer name or trademark. For hydraulic, pneumatic and electric crimping pliers, the set pressure or rated voltage, power consumption and other marks shall also be marked. The extrusion die shall be marked with the mark of the crimping terminal specification. The extrusion die for crimping terminals of 10mm and above shall have a die that can extrude the terminal specification on the terminal.
5.3 Hardness of the extrusion die
The hardness of the jaws of the crimping die of the crimping pliers shall be above Rockwell hardness HRC38. 5.4 Maximum pressure of the handle (or pedal) part During the crimping operation of the manual (or pedal) crimping pliers, the maximum pressure applied to the operating handle (or pedal) part shall not exceed the provisions of Table 3.
Types of crimping pliers
Manual one-handed crimping pliers
Manual two-handed crimping pliers
Manual (or foot-operated) hydraulic crimping pliers
Note: (1) Refers to crimping pliers that are supported by both hands for crimping operations. (2) Refers to crimping pliers that are placed on the floor for crimping operations. 5.5 Pressure of pressure cylinder
Maximum pressure
340(1)
245(1)
490(2)
When measuring the pressure of the pressure cylinder of pneumatic crimping pliers and hydraulic crimping pliers, the error must be within ±5% of the set pressure value. 5.6 Durability
The crimping pliers shall be subjected to a durability test as specified in Table 4. After the test, the parts of the crimping pliers shall not have any damage that would endanger their use. Table 4
Type of crimping pliers
Manual one-handed crimping pliers
Manual two-handed crimping pliers
Manual (or foot-operated) hydraulic crimping pliers
Pneumatic crimping pliers
Electric crimping pliers
Test time for one time3
≤100
Test conditions
Maximum load applied to the extrusion die (3)
80%~100%
Load applied to the test extrusion die (4) Number of continuous tests
Note, (3) The maximum load applied to the extrusion die is the following value: Install the tool on the test device shown in Figure 4. Before installing the cylinder on the handle part, manually operate the handle to adjust the tension of the pressure head part until the measured value of the maximum pressure test of the handle (or foot follower) part in Article 6.4 is reached. At this time, the pressure gauge indication value is the maximum load value applied to the extrusion die. (4) Starting from the contact state of the extrusion die part, further operate the crimping pliers to make the pressure limiting mechanism actuate or the position of the piston rod and the indicating mechanism in place to design the extrusion die for the test. 73
JB/T8457—1996
5.6.1 The maximum pressure value on the handle of manual single-handed, manual double-handed, and manual (or foot-operated) hydraulic crimping pliers should be measured before and after the durability test. The ratio of the maximum pressure value after the test to the maximum pressure value before the test should be greater than the provisions of Table 5. Manual (or foot-operated) hydraulic crimping pliers can also be measured according to 5.6.2. Table 5
Types of crimping pliers
Manual one-handed crimping pliers
Manual two-handed crimping pliers
Pneumatic crimping pliers
Manual (or foot-operated) hydraulic crimping pliers
Electric (hydraulic) crimping pliers
5.6.2 The pressure value of the pressure cylinder of pneumatic crimping pliers and hydraulic crimping pliers shall be measured before and after the durability test. The ratio of the pressure value after the test to the pressure value before the test shall be greater than the provisions of Table 5. 5.6.3 The maximum current consumption value of electric mechanical crimping pliers shall be measured during the durability test. The ratio of the maximum current consumption value after the end of the durability test to the value before the test must be greater than 90%. 5.7 Temperature rise
The temperature rise of electric crimping pliers must be less than the provisions of Table 6. Table 6
Coils of motors
Handles of switches, etc.
Housings that are easily touched by people (including transmission devices and bearing parts)Handles operated by people during use
5.8 Dielectric properties
Class A insulation
Class E insulation
Class B insulation
Class F insulation
Made of metal, ceramics and glass and other materials
Made of metal, ceramics and glass and other materials
Made of metal, ceramics and glass and other materials
Temperature rise K
Electric (excluding battery-powered) crimping pliers should be able to withstand the dielectric properties test of AC 50Hz and lasting 1min. The test voltage value shall be specified by the product standard in accordance with the provisions of Article 7.2.2 of CB1497. During the test, there should be no breakdown or surface flashover. 5.9 Crimping connection performance
The connection performance when crimping the wiring devices (such as wires, terminals, etc.) specified in the crimping pliers product standards shall comply with the following relevant provisions.
a) Copper crimping terminals for 0.5~6mm wires shall comply with the performance requirements specified in Articles 5.4 to 5.11 of JB/T2436.1;
Crimping terminals for 10~~300mm* wires shall comply with the performance requirements specified in Articles 5.3 to 5.7 of JB/T2436.2;
Fan-shaped quick-connect terminals shall comply with the performance requirements specified in Articles 4.2, 4.3, 4.4 and 4.6 of JB4418; TG1 tubular terminals shall comply with the performance requirements specified in Articles 4.2.1, 4.2.2 and 4.2.3 of JB/T6330. 6 Test methods
6.1 Test conditions:
Temperature 1535℃,
Relative humidity 45%~75%
Air pressure 86~106kPa.
6.2 General inspection
JB/T8457—1996
6.2.1 Appearance and dimension inspection shall be carried out in accordance with the provisions of test 1a (visual method) and 1b in GB5095.2. The inspection results shall comply with the provisions of Articles 5.1 and 5.2.
6.2.2 The thickness of the metal parts covered shall be inspected in accordance with the method specified in JB2836. The inspection results shall comply with the requirements of the drawings. 6.3 Hardness test of extrusion die
Carry out hardness test on the side near the jaws of the extrusion die in accordance with the method of GB230 hardness C scale: the test results shall comply with the provisions of Article 5.3.
6.4 Maximum pressure test of the handle (or pedal) part The test method is shown in Figure 1. Install a pressure gauge 40mm away from the end of the handle (or pedal), and perform crimping operation with the maximum applicable end of the crimping pliers and the maximum applicable wire of this end until the pressure limiting mechanism is activated, and measure the maximum pressure value applied to the handle (or pedal) part. The measurement result must comply with the provisions of Article 5.4.
After the durability test is completed, the pressure test of the handle (or pedal) part is still carried out according to this method. The test result must comply with the provisions of Article 5.6.
Pressure gauge
6.5 Pressure test of pressure cylinder
-Pressure
6.5.1 When there is a pressure limiting mechanism, the test method is shown in Figure 2. A pressure gauge is installed on the pipeline connected to the pressure pump part, and the pressure is slowly increased to measure the pressure when the pressure limiting mechanism is activated. The measurement result must comply with the provisions of Article 5.5. After the durability test is completed, the pressure test of the pressure cylinder is still carried out according to this method. The test results must comply with the provisions of Article 5.6. 6.5.2 When there is no pressure limiting mechanism, use crimping pliers to perform actual crimping. Use the crimping pliers' largest applicable end and the largest applicable wire for this end to perform crimping operations. When the pressure of the hydraulic pump or air pump reaches 95% of the set value, the extrusion die of the crimping pliers must be in place. Alternatively, install a suitable pressure gauge on the crimping pliers and use the method of measuring the pressure value on the test extrusion die to obtain its pressure for testing, as shown in Figure 3. The measurement results must comply with the provisions of Article 5.5.
Pressure gauge
JB/T8457—1996
Pressure cylinder
After the durability test is completed, the pressure test of the pressure cylinder shall still be carried out according to the method of this article. The test results must comply with the provisions of Article 5.6. Pressure gauge
Test extrusion die
6.6 Durability test
6.6.1 The durability test method of manual one-handed crimping pliers and manual two-handed crimping pliers is shown in Figure 4. The test is carried out continuously according to the test conditions specified in Table 4. The test results must comply with the provisions of Article 5.6. Before and after this test, the handle (or foot pedal) pressure test should be carried out according to Article 6.4. The test results must comply with the provisions of Article 5.4. Spring
Tensiometer
Adjuster
Counter
(Roller
Multi-spring
Tensiometer
Adjuster
JB/T8457-1996
6.6.2 The endurance test method of pneumatic crimping pliers and hydraulic crimping pliers is shown in Figure 5(a), Figure 5(b), Figure 5(c), Figure 5(d), and Figure 5(e). The crimping pliers are installed on the test device. The extrusion die starts from the contact state, and then the handle (or foot pedal) part or the switch is operated to activate the pressure limiting mechanism, or the piston rod position indication mechanism is in place, and the extrusion die returns (separates). This is counted as one test. Press The test conditions specified in Table 4 are to be tested continuously. The test results must comply with the provisions of Article 5.6. During the test, it is allowed to replace the packing or sealing ring or replace the appropriate oil pressure oil, and it is also allowed to replace the battery, etc.
Before and after this test, the pressure test of the pressure cylinder should also be carried out in accordance with Article 6.5. The test results must comply with the provisions of Article 5.5. Cylinder
Limit switch
Counter
Electromagnetic gate
Distributor
Pneumatic crimping pliers
Figure 5 (a)
Air source or
Oil pressure source
Counter
Electromagnetic valve
Tide counter
Handle part|| tt||Test extrusion die
Figure 5(b)
Reducer
Air or gas (such as nitrogen, etc.)
Cylinder or
Limit switch
Manual hydraulic crimping pliers
Pressure head
Extrusion die
Action direction
Test extrusion die
Foot pedal part
Figure 5(c)
Manual (or foot) hydraulic crimping pliers
Limit switch
JB/T8457-1996
Test extrusion die power supply
Timer
Counter
Figure 5(d) Electric hydraulic crimping pliers
Direction of extrusion die movement
Test extrusion die
Power supply.
Timer
Figure 5(e) Electric hydraulic crimping pliers
6.6.3 The durability test of electric mechanical crimping pliers can be selected as follows: Oil
External battery
O Mains power supply
a) Use the largest applicable terminal of the crimping pliers and the largest applicable wire of this terminal to perform crimping operation, and measure the maximum current consumption when the pressure limiting mechanism is activated or the indication mechanism of crimping completion is in place; b) Install the crimping pliers on the test device as shown in Figure 6 and conduct continuous tests according to the test conditions specified in Table 4. The so-called "maximum load applied to the extrusion die" in Table 4 means that the value indicated on the pressure gauge when the tension applied by the pressure head is adjusted until the maximum current consumption value determined by method 6.6.3a is reached is regarded as the maximum load applied to the extrusion die. After this test is completed, the test in 6.6.3a shall be carried out. During the test, appropriate refueling or battery replacement is allowed. The test results shall comply with the provisions of 5.6.3. 78
6.7 Temperature rise test
Tensiometer
Tensiometer
JB/T8457-1996
Transmission part
Digital timer
External battery
Mains power supply
Amperemeter
Install the electric hydraulic crimping pliers on the test device as shown in Figure 5(d) or Figure 5(e), and the electric mechanical crimping pliers on the test device as shown in Figure 6 to carry out temperature rise test. After continuous test under the test conditions specified in Table 7, measure the temperature rise of each part according to the measurement method in Table 8. The test results must comply with the provisions of Article 5.7.
Electric mechanical crimping pliers
Electric hydraulic
Crimping pliers
Wire circumference of motor
70mm and below
Above 70mm
Handle of switch, etc.
Number of continuous tests
Housing that can be easily touched by magnets (including transmission device and bearing parts)Handle operated by people during use
6.8 Dielectric property test
80%~100% of the maximum load (3) applied to the extrusion die
Negative load applied to the test extrusion die (4)
Thermoelectric thermometer method
Test according to the provisions of Article 8.2.2.3 of GB1497. After the test, it should meet the requirements of Article 5.8. 6.9 Crimping connection performance test
Test time for one time
After crimping the wiring devices (such as wires, terminals, etc.) specified in the crimping pliers product standard, the crimping connection performance test shall be carried out. The test method shall be carried out in accordance with the provisions of the following relevant articles. a) According to the provisions of 6.4 (temperature rise test), 6.5 (thermal cycle test), 6.6 (crimping resistance test), 6.7 (salt spray test), 6.8 (short-time withstand current test), 6.9 (tensile resistance test), 6.10 (tensile torsion test), 6.11 (dielectric strength test) in JB/T2436.1 standard. The test results shall comply with the provisions of Article 5.9a; b) According to the provisions of Article 6.3 (crimping resistance test), Article 6.4 (cyclic test), Article 6.5 (salt spray resistance test), Article 6.6 (short-time withstand current test), and Article 6.7 (tensile test) in the JB/T2436.2 standard. The test results shall comply with the provisions of Article 5.9b; c) According to the provisions of Article 5.3.3 (contact resistance test), Article 5.3.4 (temperature rise test), Article 5.3.5 (resistive electrical overload test), and Article 5.3.7 (tensile test) in the JB4418 standard. The test results shall comply with the provisions of Article 5.9c. d) According to the provisions of Article 5.3.1 (tensile test), Article 5.3.2 (temperature rise test), and Article 5.3.3 (voltage drop measurement) in the JB/T6330 standard. The test results shall comply with the provisions of Article 5.9d. 7 Inspection rules
7.1 Inspection classification
It is divided into type inspection, periodic inspection and factory inspection. 7.2 Type inspection
The purpose of type inspection is to verify whether the design and performance of the crimping pliers meet the requirements of the standard. Type inspection must be carried out in the following cases; a) newly completed trial samples;
b) when the design performance or product quality is affected by changes in process, materials or structure; when the national quality supervision agency proposes a requirement for type inspection. e)
Type inspection rules
Type inspection is considered qualified only when all samples are qualified in sequential inspection. Only products that pass the type inspection can be identified. 7.2.2 Type inspection items
Type inspection items and sample quantity are shown in Table 9. In the wire and terminal crimping connection performance test, the total number of terminals used is 3·m·n, and the number of terminals of the corresponding specifications for each jaw of the crimping pliers is 3m, where: 3 is the number of crimping pliers, m is the number of terminals required by the test items in the relevant standards in Article 6.9; n is the number of jaws of the crimping pliers extrusion die. The specific number of terminals is specified by the crimping pliers product standard. Table 9
General inspection
Inspection of coating thickness of gold plaque
Hardness test of extrusion die
Before durability test
Durability test
After durability test
Temperature rise test
Dielectric property test
Crimp connection performance test
7.3 Periodic inspection
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Inspection basis
Number of tests
(pieces)
JB/T8457—1996
Periodic inspection is to verify whether the performance of the finalized product can be maintained stable during the production process. After the finalization, the product should be inspected periodically every 3 to 5 years.
7.3.1 Rules for periodic inspection
Products for periodic inspection must be randomly selected from batches of products that have passed the factory inspection. Periodic inspection shall be carried out in accordance with the provisions of GB2829 and a single sampling plan shall be adopted.
During the periodic inspection, if one inspection group fails, it shall be judged as unqualified. 7.3.2 Periodic inspection items
The periodic inspection items are shown in Table 9. The discrimination level is Ⅱ, RQL is 65, the sample size is 3, and the judgment array is [01]. 7.4 Factory inspection
Products must be inspected by the inspection department before they are shipped out, and can only be shipped after they pass the inspection. Factory inspection is divided into routine inspection and factory sampling inspection. 7.4.1 Routine inspection must be carried out on each unit. The inspection content is to check for defects caused by manual assembly. Products that fail the routine inspection must be repaired one by one until they fully meet the requirements. If they cannot be repaired, they should be scrapped. 7.4.2 Factory sampling inspection shall be carried out in accordance with the provisions of GB2828, using a single or double sampling plan. The inspection items and other contents shall comply with the provisions of Table 10.
When the crimping pliers are judged as unqualified, screening is allowed, and then the unqualified items are re-checked according to the stricter sampling plan. If they are still unqualified, they are judged as unqualified for factory inspection. Table 10
General inspection
Inspection of metal coating thickness
Hardness test of extrusion die
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) part Pressure test of pressure cylinder
Dielectric property test
8 Packaging, transportation and storage
8.1 Packaging
Inspection basis
Unqualified category
Inspection level
Inspection before pre-assembly
8.1.1 The packaging of the product must be able to prevent damage during transportation and have the function of rainproof or moistureproof. The packaging box should generally contain a packing list, certificate of conformity and instruction manual. bzxZ.net
8.1.2 The packaging mark should be clear and neat, and ensure that the mold shed is not unclear due to long-term transportation or storage. Its mark should generally include the following content. Manufacturer name or trademark:
b) Product name, model and quantity;
Box size (length × width × height):
d) Net weight and gross weight;
Destination station (port) and consignee;
f) Departure station (port) and consignor;
g) Mark with "Handle with care", "Keep away from moisture", "Upward" and packaging year and month. 8.2 Transportation and storage
Environmental conditions for transportation and storage:9 Crimping connection performance test
Test time for one time
After crimping the wiring devices (such as wires, terminals, etc.) specified in the crimping pliers product standard, the crimping connection performance test shall be carried out. The test method shall be carried out in accordance with the provisions of the following relevant articles. a) According to the provisions of 6.4 (temperature rise test), 6.5 (thermal cycle test), 6.6 (crimping resistance test), 6.7 (salt spray test), 6.8 (short-time withstand current test), 6.9 (tensile resistance test), 6.10 (tensile torsion test), 6.11 79
JB/T8457-1996
(dielectric strength test) in the JB/T2436.1 standard. The test results shall comply with the provisions of Article 5.9a; b) According to the provisions of Article 6.3 (crimping resistance test), Article 6.4 (cyclic test), Article 6.5 (salt spray resistance test), Article 6.6 (short-time withstand current test), and Article 6.7 (tensile test) in the JB/T2436.2 standard. The test results shall comply with the provisions of Article 5.9b; c) According to the provisions of Article 5.3.3 (contact resistance test), Article 5.3.4 (temperature rise test), Article 5.3.5 (resistive electrical overload test), and Article 5.3.7 (tensile test) in the JB4418 standard. The test results shall comply with the provisions of Article 5.9c. d) According to the provisions of Article 5.3.1 (tensile test), Article 5.3.2 (temperature rise test), and Article 5.3.3 (voltage drop measurement) in the JB/T6330 standard. The test results shall comply with the provisions of Article 5.9d. 7 Inspection rules
7.1 Inspection classification
It is divided into type inspection, periodic inspection and factory inspection. 7.2 Type inspection
The purpose of type inspection is to verify whether the design and performance of the crimping pliers meet the requirements of the standard. Type inspection must be carried out in the following cases; a) newly completed trial samples;
b) when the design performance or product quality is affected by changes in process, materials or structure; when the national quality supervision agency proposes a requirement for type inspection. e)
Type inspection rules
Type inspection is considered qualified only when all samples are qualified in sequential inspection. Only products that pass the type inspection can be identified. 7.2.2 Type inspection items
Type inspection items and sample quantity are shown in Table 9. In the wire and terminal crimping connection performance test, the total number of terminals used is 3·m·n, and the number of terminals of the corresponding specifications for each jaw of the crimping pliers is 3m, where: 3 is the number of crimping pliers, m is the number of terminals required by the test items in the relevant standards in Article 6.9; n is the number of jaws of the crimping pliers extrusion die. The specific number of terminals is specified by the crimping pliers product standard. Table 9
General inspection
Inspection of coating thickness of gold plaque
Hardness test of extrusion die
Before durability test
Durability test
After durability test
Temperature rise test
Dielectric property test
Crimp connection performance test
7.3 Periodic inspection
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Inspection basis
Number of tests
(pieces)
JB/T8457—1996
Periodic inspection is to verify whether the performance of the finalized product can be maintained stable during the production process. After the finalization, the product should be inspected periodically every 3 to 5 years.
7.3.1 Rules for periodic inspection
Products for periodic inspection must be randomly selected from batches of products that have passed the factory inspection. Periodic inspection shall be carried out in accordance with the provisions of GB2829 and a single sampling plan shall be adopted.
During the periodic inspection, if one inspection group fails, it shall be judged as unqualified. 7.3.2 Periodic inspection items
The periodic inspection items are shown in Table 9. The discrimination level is Ⅱ, RQL is 65, the sample size is 3, and the judgment array is [01]. 7.4 Factory inspection
Products must be inspected by the inspection department before they are shipped out, and can only be shipped after they pass the inspection. Factory inspection is divided into routine inspection and factory sampling inspection. 7.4.1 Routine inspection must be carried out on each unit. The inspection content is to check for defects caused by manual assembly. Products that fail the routine inspection must be repaired one by one until they fully meet the requirements. If they cannot be repaired, they should be scrapped. 7.4.2 Factory sampling inspection shall be carried out in accordance with the provisions of GB2828, using a single or double sampling plan. The inspection items and other contents shall comply with the provisions of Table 10.
When the crimping pliers are judged as unqualified, screening is allowed, and then the unqualified items are re-checked according to the stricter sampling plan. If they are still unqualified, they are judged as unqualified for factory inspection. Table 10
General inspection
Inspection of metal coating thickness
Hardness test of extrusion die
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) part Pressure test of pressure cylinder
Dielectric property test
8 Packaging, transportation and storage
8.1 Packaging
Inspection basis
Unqualified category
Inspection level
Inspection before pre-assembly
8.1.1 The packaging of the product must be able to prevent damage during transportation and have the function of rainproof or moistureproof. The packaging box should generally contain a packing list, certificate of conformity and instruction manual.
8.1.2 The packaging mark should be clear and neat, and ensure that the mold shed is not unclear due to long-term transportation or storage. Its mark should generally include the following content. Manufacturer name or trademark:
b) Product name, model and quantity;
Box size (length × width × height):
d) Net weight and gross weight;
Destination station (port) and consignee;
f) Departure station (port) and consignor;
g) Mark with "Handle with care", "Keep away from moisture", "Upward" and packaging year and month. 8.2 Transportation and storage
Environmental conditions for transportation and storage:9 Crimping connection performance test
Test time for one time
After crimping the wiring devices (such as wires, terminals, etc.) specified in the crimping pliers product standard, the crimping connection performance test shall be carried out. The test method shall be carried out in accordance with the provisions of the following relevant articles. a) According to the provisions of 6.4 (temperature rise test), 6.5 (thermal cycle test), 6.6 (crimping resistance test), 6.7 (salt spray test), 6.8 (short-time withstand current test), 6.9 (tensile resistance test), 6.10 (tensile torsion test), 6.11 79
JB/T8457-1996
(dielectric strength test) in the JB/T2436.1 standard. The test results shall comply with the provisions of Article 5.9a; b) According to the provisions of Article 6.3 (crimping resistance test), Article 6.4 (cyclic test), Article 6.5 (salt spray resistance test), Article 6.6 (short-time withstand current test), and Article 6.7 (tensile test) in the JB/T2436.2 standard. The test results shall comply with the provisions of Article 5.9b; c) According to the provisions of Article 5.3.3 (contact resistance test), Article 5.3.4 (temperature rise test), Article 5.3.5 (resistive electrical overload test), and Article 5.3.7 (tensile test) in the JB4418 standard. The test results shall comply with the provisions of Article 5.9c. d) According to the provisions of Article 5.3.1 (tensile test), Article 5.3.2 (temperature rise test), and Article 5.3.3 (voltage drop measurement) in the JB/T6330 standard. The test results shall comply with the provisions of Article 5.9d. 7 Inspection rules
7.1 Inspection classification
It is divided into type inspection, periodic inspection and factory inspection. 7.2 Type inspection
The purpose of type inspection is to verify whether the design and performance of the crimping pliers meet the requirements of the standard. Type inspection must be carried out in the following cases; a) newly completed trial samples;
b) when the design performance or product quality is affected by changes in process, materials or structure; when the national quality supervision agency proposes a requirement for type inspection. e)
Type inspection rules
Type inspection is considered qualified only when all samples are qualified in sequential inspection. Only products that pass the type inspection can be identified. 7.2.2 Type inspection items
Type inspection items and sample quantity are shown in Table 9. In the wire and terminal crimping connection performance test, the total number of terminals used is 3·m·n, and the number of terminals of the corresponding specifications for each jaw of the crimping pliers is 3m, where: 3 is the number of crimping pliers, m is the number of terminals required by the test items in the relevant standards in Article 6.9; n is the number of jaws of the crimping pliers extrusion die. The specific number of terminals is specified by the crimping pliers product standard. Table 9
General inspection
Inspection of coating thickness of gold plaque
Hardness test of extrusion die
Before durability test
Durability test
After durability test
Temperature rise test
Dielectric property test
Crimp connection performance test
7.3 Periodic inspection
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Inspection basis
Number of tests
(pieces)
JB/T8457—1996
Periodic inspection is to verify whether the performance of the finalized product can be maintained stable during the production process. After the finalization, the product should be inspected periodically every 3 to 5 years.
7.3.1 Rules for periodic inspection
Products for periodic inspection must be randomly selected from batches of products that have passed the factory inspection. Periodic inspection shall be carried out in accordance with the provisions of GB2829 and a single sampling plan shall be adopted.
During the periodic inspection, if one inspection group fails, it shall be judged as unqualified. 7.3.2 Periodic inspection items
The periodic inspection items are shown in Table 9. The discrimination level is Ⅱ, RQL is 65, the sample size is 3, and the judgment array is [01]. 7.4 Factory inspection
Products must be inspected by the inspection department before they are shipped out, and can only be shipped after they pass the inspection. Factory inspection is divided into routine inspection and factory sampling inspection. 7.4.1 Routine inspection must be carried out on each unit. The inspection content is to check for defects caused by manual assembly. Products that fail the routine inspection must be repaired one by one until they fully meet the requirements. If they cannot be repaired, they should be scrapped. 7.4.2 Factory sampling inspection shall be carried out in accordance with the provisions of GB2828, using a single or double sampling plan. The inspection items and other contents shall comply with the provisions of Table 10.
When the crimping pliers are judged as unqualified, screening is allowed, and then the unqualified items are re-checked according to the stricter sampling plan. If they are still unqualified, they are judged as unqualified for factory inspection. Table 10
General inspection
Inspection of metal coating thickness
Hardness test of extrusion die
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) part Pressure test of pressure cylinder
Dielectric property test
8 Packaging, transportation and storage
8.1 Packaging
Inspection basis
Unqualified category
Inspection level
Inspection before pre-assembly
8.1.1 The packaging of the product must be able to prevent damage during transportation and have the function of rainproof or moistureproof. The packaging box should generally contain a packing list, certificate of conformity and instruction manual.
8.1.2 The packaging mark should be clear and neat, and ensure that the mold shed is not unclear due to long-term transportation or storage. Its mark should generally include the following content. Manufacturer name or trademark:
b) Product name, model and quantity;
Box size (length × width × height):
d) Net weight and gross weight;
Destination station (port) and consignee;
f) Departure station (port) and consignor;
g) Mark with "Handle with care", "Keep away from moisture", "Upward" and packaging year and month. 8.2 Transportation and storage
Environmental conditions for transportation and storage:The number of terminals required by the test items in the 9 relevant standards; n is the number of jaws of the crimping pliers extrusion die. The specific number of terminals is specified by the crimping pliers product standard. Table 9
General inspection
Inspection of coating thickness of gold plaque
Hardness test of extrusion die
Before durability test
Durability test
After durability test
Temperature rise test
Dielectric property test
Crimp connection performance test
7.3 Periodic inspection
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Inspection basis
Number of tests
(pieces)
JB/T8457—1996
Periodic inspection is to verify whether the performance of the finalized product can be maintained stable during the production process. After the finalization, the product should be inspected periodically every 3 to 5 years.
7.3.1 Rules for periodic inspection
Products for periodic inspection must be randomly selected from batches of products that have passed the factory inspection. Periodic inspection shall be carried out in accordance with the provisions of GB2829 and a single sampling plan shall be adopted.
During the periodic inspection, if one inspection group fails, it shall be judged as unqualified. 7.3.2 Periodic inspection items
The periodic inspection items are shown in Table 9. The discrimination level is Ⅱ, RQL is 65, the sample size is 3, and the judgment array is [01]. 7.4 Factory inspection
Products must be inspected by the inspection department before they are shipped out, and can only be shipped after they pass the inspection. Factory inspection is divided into routine inspection and factory sampling inspection. 7.4.1 Routine inspection must be carried out on each unit. The inspection content is to check for defects caused by manual assembly. Products that fail the routine inspection must be repaired one by one until they fully meet the requirements. If they cannot be repaired, they should be scrapped. 7.4.2 Factory sampling inspection shall be carried out in accordance with the provisions of GB2828, using a single or double sampling plan. The inspection items and other contents shall comply with the provisions of Table 10.
When the crimping pliers are judged as unqualified, screening is allowed, and then the unqualified items are re-checked according to the stricter sampling plan. If they are still unqualified, they are judged as unqualified for factory inspection. Table 10
General inspection
Inspection of metal coating thickness
Hardness test of extrusion die
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) part Pressure test of pressure cylinder
Dielectric property test
8 Packaging, transportation and storage
8.1 Packaging
Inspection basis
Unqualified category
Inspection level
Inspection before pre-assembly
8.1.1 The packaging of the product must be able to prevent damage during transportation and have the function of rainproof or moistureproof. The packaging box should generally contain a packing list, certificate of conformity and instruction manual.
8.1.2 The packaging mark should be clear and neat, and ensure that the mold shed is not unclear due to long-term transportation or storage. Its mark should generally include the following content. Manufacturer name or trademark:
b) Product name, model and quantity;
Box size (length × width × height):
d) Net weight and gross weight;
Destination station (port) and consignee;
f) Departure station (port) and consignor;
g) Mark with "Handle with care", "Keep away from moisture", "Upward" and packaging year and month. 8.2 Transportation and storage
Environmental conditions for transportation and storage:The number of terminals required by the test items in the 9 relevant standards; n is the number of jaws of the crimping pliers extrusion die. The specific number of terminals is specified by the crimping pliers product standard. Table 9
General inspection
Inspection of coating thickness of gold plaque
Hardness test of extrusion die
Before durability test
Durability test
After durability test
Temperature rise test
Dielectric property test
Crimp connection performance test
7.3 Periodic inspection
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Maximum pressure test of handle (or pedal) Pressure test of pressure cylinder
Inspection basis
Number of tests
(pieces)
JB/T8457—1996
Periodic inspection is to verify whether the performance of the finalized product can be maintained stable during the production process. After the finalization, the product should be inspected periodically every 3 to 5 years.
7.3.1 Rules for periodic inspection
Products for periodic inspection must be randomly selected from batches of products that have passed the factory inspection. Periodic inspection shall be carried out in accordance with the provisions of GB2829 and a single sampling plan shall be adopted.
During the periodic inspection, if one inspection group fails, it shall be judged as unqualified. 7.3.2 Periodic inspection items
The periodic inspection items are shown in Table 9. The discrimination level is Ⅱ, RQL is 65, the sample size is 3, and the judgment array is [01]. 7.4 Factory inspection
Products must be inspected by the inspection department before they are shipped out, and can only be shipped after they pass the inspection. Factory inspection is divided into routine inspection and factory sampling inspection. 7.4.1 Routine inspection must be carried out on each unit. The inspection content is to check for defects caused by manual assembly. Products that fail the routine inspection must be repaired one by one until they fully meet the requirements. If they cannot be repaired, they should be scrapped. 7.4.2 Factory sampling inspection shall be carried out in accordance with the provisions of GB2828, using a single or double sampling plan. The inspection items and other contents shall comply with the provisions of Table 10.
When the crimping pliers are judged as unqualified, screening is allowed, and then the unqualified items are re-checked according to the stricter sampling plan. If they are still unqualified, they are judged as unqualified for factory inspection. Table 10
General inspection
Inspection of metal coating thickness
Hardness test of extrusion die
Dimension inspection
Appearance inspection
Maximum pressure test of handle (or pedal) part Pressure test of pressure cylinder
Dielectric property test
8 Packaging, transportation and storage
8.1 Packaging
Inspection basis
Unqualified category
Inspection level
Inspection before pre-assembly
8.1.1 The packaging of the product must be able to prevent damage during transportation and have the function of rainproof or moistureproof. The packaging box should generally contain a packing list, certificate of conformity and instruction manual.
8.1.2 The packaging mark should be clear and neat, and ensure that the mold shed is not unclear due to long-term transportation or storage. Its mark should generally include the following content. Manufacturer name or trademark:
b) Product name, model and quantity;
Box size (length × width × height):
d) Net weight and gross weight;
Destination station (port) and consignee;
f) Departure station (port) and consignor;
g) Mark with "Handle with care", "Keep away from moisture", "Upward" and packaging year and month. 8.2 Transportation and storage
Environmental conditions for transportation and storage:
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