Some standard content:
JB/T9526.-1999
This standard is a revision of ZBJ64001--1986 "Technical Conditions for TIG Welding Torches". In addition to making editorial revisions to ZBJ64001---1988 in accordance with the requirements of GB/T1.1-1993 and GB/T1.3-1997, this standard also makes the following revisions to the relevant technical contents: 1. Added the "reference standard" clause.
2 Change Article 2.5 of ZBJ64001--1986 "The wind speed in the place where the welding torch is used should be less than 2m/s, otherwise a windproof device should be added" to "The wind speed in the place where the welding torch is used should be less than 1m/s, otherwise a windproof device should be added", so that this standard is consistent with JB/T8747-1998 "Technical Conditions for Manual Tungsten Inert Gas Shielded Arc Welding Machine (TIG Welding Machine)". 3 Change the working cycle of the manual welding torch in Article 4.1 from 5minnin to 10min, the working cycle of the automatic welding torch is changed from 20min to continuous, so as to be consistent with GB15579-1995 and other standards. The temperature rise of the handheld part of the welding torch in Article 45.4.1 should not exceed 25K. Change it to the temperature rise of no more than 30K. 5 The temperature rise test method in Article 6.6.1 is changed from "When the temperature rise does not exceed 1℃ within 20min, it is considered to have reached a thermally stable state..." to "When the temperature rise does not exceed 2K/h, it is considered to have reached a thermally stable state...". The temperature rise test of the welding torch can be carried out together with the temperature rise test of the welding machine.
From the date of implementation, this standard will replace ZBJ64001--1986. This standard is proposed and managed by the National Electric Welding Machine Standardization Technical Committee. The drafting unit of this standard: Chengdu Electric Welding Machine Research Institute. The main drafter of this standard: Pan Ying.
1 Scope
Standard of the Machinery Industry of the People's Republic of China
TIG Welding Torch
Technical Conditions
The specification of welding torches for TIG weldingJB/T9526--1999
Replaces ZB J64 001 -1986
This standard specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation, storage, etc. of TIG welding (tungsten inert gas shielded welding) torches.
This standard applies to manual and general automatic TIG welding torches (hereinafter referred to as welding torches) under general use conditions. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions 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/T2423.3-1993 Basic environmental test procedures for electric and electronic products Test Ca: Steady-state damp heat test method (eqv IEC 60068-2-3:1984)
3 Conditions of use
The welding torch should be able to work normally under the following conditions of use. 3.1 Ambient air temperature range
During welding: Gas-cooled welding torch
10-+40℃
+5～+40℃
Water-cooled welding torch
25～+55℃
During transportation and storage
3.2 Relative air humidity
At 40℃
At 20℃
≤50%
≤90%
+5~+30℃.
3.3 Cooling water inlet temperature
3.4 The wind speed in the place where the welding torch is used should be less than 1m/s, otherwise a windproof device should be added. 3.5 The dust, acid, corrosive gas or substance in the surrounding air should not exceed the normal content, except for those generated during the welding process. There should be no severe vibration and bumps in the place of use.
3.6 The altitude should not exceed 1000m.
4 Marking
4.1 The model and rated current of the welding torch should be engraved at an appropriate position on its outer surface, and the handwriting should ensure that it is not easy to wear during the entire use period. 4.2 The attached welding torch accessories should be marked with their main specifications in a certain way. 5 Rated value
5.1 Rated welding current level
Rated welding current level below 100A is recommended to be divided into R5 priority number system, and above 100A is recommended to be divided into R10 priority number system. The National Machinery Industry Bureau approved 196 on August 6, 1999
2000-01-01 implementation
Rated welding current (A) is divided into the following levels:
JB/T9526-1999
25,40,63,100,125,160,200,250,315,400,500A. 5.2 Rated duty cycle (%)
35,60,100.
5.3 Working cycle
10min for manual welding torch;
continuous for automatic welding torch.
6 Technical requirements
The welding torch shall be processed according to the designed drawings to achieve the specified size and accuracy. 6.2 Insulation performance of welding torch
6.2.1 The insulation resistance of welding torch shall not be less than 5MQ. 6.2.2 The surface of the welding torch insulation and the conductor shall be able to withstand 2500V power frequency AC voltage for 1min without flashover or breakdown.
6.3 Sealing performance of welding torch
6.3.1 The gas circuit of welding torch shall work normally under the inlet pressure of 1×105Pa without leakage. 6.3.2 The water-cooled welding torch shall work normally under the inlet pressure of 2×10°Pa without leakage. 6.4 Heat resistance of welding torch
6.4.1 The temperature rise of the handheld part of the manually operated welding torch shall not exceed 30K. 6.4.2 The temperature rise of the rest of the manual welding torch and the automatic welding torch shall not exceed the specified operating temperature of the material itself. 6.4.3 After the running test specified in 7.6.2, no part of the welding torch should have any damage, such as local melting, carbonization, bubbles, cracks or cracks.
6.5 Surface quality
6.5.1 The surface of all molded parts and metal processing parts of the welding torch shall be clean and smooth, without burrs, pores, slag inclusions, peeling and other defects. Except for the necessary edge angles, the edges shall be rounded.
6.5.2 The surface roughness of the welding torch insulator shall not be less than, and the roughness of the inner surface of the nozzle shall not be less than the change. 6.5,3 All electroplated parts shall comply with the provisions of relevant standards. 6.6 Accuracy
6.6.1 After the welding torch is assembled, the center of the electrode chuck shall be coaxial with the nozzle when measured according to the method of 7.2, and the coaxiality error shall not be greater than 5% of the nozzle diameter.
6.6.2 All torch parts manufactured according to the same drawings shall be interchangeable without any modification. 6.6.3 All contact surfaces shall be in close contact, and no obvious misalignment is allowed. 6.7 Connection
6.7.1 The torch cable shall be connected to the dedicated power supply or control box by threaded connection, and the connection dimensions are: air or water cable connector, M16×1.5, thread length 15mm; water outlet connector M12×1.25, thread length 10mm; protective air pipe connector M10×1.0, thread length 8mm. The connector dimensions are shown in Figure 1.
Thread size
JB/T9526--1999
6.7.2 The following permanent text marks shall be engraved on the joint nut: G for protective gas joint;
- for ventilation cable joint:
W for cooling water outlet joint;
WC——for water cable joint.
6.7.3 The thread of the welding torch nozzle shall be selected from the following sizes: M8×1.0
(M18× 1.5) M20X×1.5
The number of threads shall be not less than 5.
Note: The values in brackets are not recommended values. 6.8 Cables and Pipes
M24 X 2.0
(M14 X 1.25)
6.8.1 The cables and pipes of the welding nozzle shall be collectively covered with an insulating sheath (collectively referred to as a cable bundle), and the length of the insulating sheath shall be 0.5mm shorter than the cable. 6.8.2 When the welding torch cable bundle is wound once, when the bending diameter is 5 times the diameter of the cable bundle, the flow rate change of the gas and cooling water specified in 7.7.3 shall not exceed 10%.
6.8.3 The length of the welding torch cable bundle shall not be less than 5m. 6.8.4 The welding torch cable bundle shall be soft, durable, and resistant to damage caused by grease and solvents. 6.9 Performance in Use
6.9.1 Arc Ignition Performance
When the welding torch and the corresponding matching welding machine are tested according to 7.7.1, it shall be ensured that the arc is ignited within three seconds after the arc ignition device is started. 6.9.2 Gas shielding performance
The welding torch should have good gas shielding performance. When tested according to 7.7.2, the welding spot should be silvery white or golden yellow. 6.9.3 The gas and water channels of the welding torch should be kept unobstructed. 6.10 Mechanical impact resistance
When the welding torch is tested in accordance with 7.8, there should be no surface peeling, cracking or other damage except scratches. Table 1 Available tungsten electrodes and nozzles for welding torches
Rated current of welding torches
Diameter of tungsten electrode
1.0;1.6,2.0
1. 0;1. 6;2. 0;2. 5
1. 6;2.0,2.5;3.0
1. 6;2.0;2.5:3.0;4. 0
1.6+2.02.5;3.014.0;5.0
2.0,2.5,3.0,4.0;5.0,6.0
Note: For welding torches with rated current levels not listed in the table, the specifications of available tungsten electrodes and nozzles are specified by enterprise standards. 6.11 Wet heat performance
Nozzle inner diameter
8,10,12
10;12;14
10;12:14;16
10:12:14;16
10;12;14;16;18
12;14:16;18;20;22
After the wet heat treatment in 7.9, the insulation resistance and dielectric strength of the welding torch shall not be less than 70% of the values specified in 6.2. 198
6.12 Spare parts
JB/T 9526—1999
6.12.1 The specifications of the matching tungsten electrodes and nozzles that can be supplied with the welding torch shall comply with the requirements of Table 1. 6.12.2 The welding torch shall be equipped with spare parts such as electrode chuck, tungsten electrode, nozzle, gas lens and various sealing rings, with no less than two pieces of each specification. 6.13 Life
Except for the nozzle, tungsten electrode, electrode chuck, sealing ring and other wearing parts, the average trouble-free working time of the welding torch shall be no less than 500h. Note: This clause is a recommended indicator.
7 Inspection methodbZxz.net
7.1 Appearance inspection
The external dimensions, structure and roughness shall be measured by visual inspection and general measuring tools. 7.2 Measurement of the coaxiality of the nozzle and electrode chuck
Measurement shall be carried out with a standard mandrel instead of the tungsten electrode, and the measuring point shall be located at the nozzle outlet. 7.3 Insulation resistance determination
The insulation resistance shall be measured before the dielectric strength test. Wrap the surface of the welding torch cable and the handle or clamping part of the welding torch with metal foil, apply a 500V DC voltage between the metal foil and the cable or the welding torch conductor, and read the value after stabilization. 7.4 Dielectric strength test
Apply a 2500V actual sinusoidal waveform voltage with a frequency of 50Hz between the metal foil wrapped on the cable surface and the handle or clamping part of the welding torch and the cable or welding torch conductor. The voltage applied at the beginning shall not exceed half of the specified value, then rise to the full value within 10s, last for 1min, and quickly reduce the voltage before cutting off. During factory inspection, full voltage is used, and the duration is not less than 5s. The leakage current is set at 5mA, and observe whether there is flashover and breakdown.
7.5 Sealing test
7.5.1 Airtight test
Connect the welding torch to a gas source with an inlet pressure of 1×10°Pa, block the outlet and immerse it in water for 10s, and no bubbles should escape. 7.5.2 Watertightness test
Connect the water-cooled welding torch to a water source with an inlet pressure of 2×105Pa, block the water outlet, and test for 1 minute. There should be no water leakage or seepage. The test can also be carried out with gas of the same pressure.
7.6 Heat resistance test
7.6.1 Temperature rise test
Clamp the welding torch on a bracket with negligible heat dissipation, with a water inlet pressure of 1×10°Pa. According to the rated duty cycle and rated current of the welding torch (which can also be converted into a current with a 100% duty cycle), the arc gap specified in 7.7.1, and the gas flow specified in Table 2, ignite the arc on a water-cooled copper plate with good cooling performance. Use a thermocouple or a spot thermometer to measure the temperature rise of the handheld part every 10 minutes. The measuring points shall not be less than 5 points, with the hottest point as the standard. When the change in temperature rise does not exceed 2K/h, it is considered to have reached a thermally stable state. The temperature rise measurement shall be carried out during the half time of the heating period in the last cycle, and the flow rate of cooling water shall be measured. 7.6.2 Operation test
The welding torch shall be operated continuously for 8 hours on a water-cooled copper plate at the rated current and rated duty cycle (current that can be converted into 100% duty cycle) with the arc gap specified in 7.7.1.
7.7 Performance test
7.7.1 Arc striking performance test
The test adopts gas protection. The arc gap of a welding torch of 40A or less is 2mm, and the arc gap of a welding torch of more than 40A is 3mm. The arc striking shall be carried out with the rated current of the welding torch and the minimum current of the corresponding supporting power supply. When striking the arc, the welding torch cable shall be in contact with the ground conductor. Each arc striking shall be carried out after the tungsten electrode has cooled down. The success rate shall not be less than 90% after 30 arc strikings. 7.7.2 Gas shielding performance test
According to the specifications shown in Table 2, the tungsten electrode shall extend from the nozzle outlet to the inner diameter of the nozzle, and spot welding tests shall be carried out on stainless steel plates. The number of spot weldings for each 199
specification torch shall not be less than 5.
7.7.3 Gas and water passage smoothing test
JB/T9526—1999
Under the water and gas inlet pressure of 1×10'Pa, the gas flow rate shall be adjustable to the values listed in Table 2, and the water flow rate shall be able to reach the water flow rate measured during the temperature rise test.
Rated current of welding torch
Tungsten electrode diameter
Gas shielding performance test specifications
Nozzle diameter
Spot welding current
Note: For welding torches with rated current levels not listed in the table, the specifications for gas shielding performance tests shall be specified by enterprise standards. 7.8 Mechanical impact test
Maximum fluorine gas flow
Minimum true diameter of welding point
Remove the ceramic nozzle and the long electrode cap, connect the welding torch to the cable, and hang it according to the dimensions specified in Figure 2. Then release the welding torch at an initial velocity of zero, so that it impacts a pine block with a size of 500mm×500mm×20mm. Repeat the test 10 times for each welding torch. 7.9 Wet heat
The environmental conditions and methods of heat treatment shall be carried out in accordance with GB/T2423.3. The temperature in the effective space of the test chamber shall be maintained at 40±2℃, and the relative humidity shall be maintained within the range of 93+3%. The welding torch shall be preheated at 40℃ first, and then humidified when its temperature stabilizes to prevent condensation on the welding torch during the test. The insulation resistance and insulation dielectric strength tests after 48h wet heat treatment shall be carried out in accordance with Article 6.11. The welding torch subjected to wet heat test is not required to be tested in accordance with Article 6.2 before the wet heat test. 45″
7.10 Welding test
Use a current close to the rated current of the welding torch to weld at least three 200mm long stainless steel or aluminum butt welds. The appearance and shape of the weld should be good without visible defects.
Inspection rules
JB/T9526—1999
The welding torch must be inspected and qualified by the technical inspection department of the manufacturer before it can leave the factory.8.2
Each welding torch should be inspected and the inspection items are shown in Table 3. Table 3 Inspection items
Inspection items| |tt||Appearance and packaging inspection
Insulation performance inspection
Sealing inspection
Waterway and road patency test
8.3 Welding torches should be subject to type inspection in the following cases: a) Regular sampling inspection of batch products (not less than once a year); to
comply with 6.1, 6.56.6, 6.7, 6.8, 6.12, 9.1, 9.2, 9.3, comply with 6.2
comply with 6.3
comply with 7.7.3
b) The design, process or There are major changes in the materials used, which are sufficient to affect certain characteristics and parameters; () When the factory inspection results of the welding torch are not allowed to deviate from the previous type inspection results; d) New trial-produced welding torches.
8.4 In addition to all factory inspection items, the type inspection shall also inspect all other items in accordance with this standard. 8.5 Each item of the type inspection shall comply with the requirements of this standard. At least two welding torches of each specification shall be inspected. If the initial inspection fails, double the number of welding torches shall be re-inspected. If all the re-inspections are qualified, the batch of products is considered qualified; if the re-inspection fails If there are still unqualified items, the batch of welding torches will be judged as unqualified.
9 Packaging, transportation and storage
9.1 Each welding torch and its accessories should be packed in a bag and then put into a wooden or paper packaging box, and the welding torch should be fixed in the box. 9.2 The outer wall of the packaging box should be marked with the manufacturer's name and address, welding torch model, name, packing year and month, net weight, and gross weight. The words will not be blurred due to sun and rain.
9.3 The technical data packed with the welding torch and accessories should include the instruction manual, nozzle and electrode chuck parts drawings and product certificates. 9.4 The welding torch should be protected from rain and snow during long-term storage and transportation. The welding torch should be stored in a warehouse with relative humidity not exceeding 85%, good ventilation and temperature not exceeding 40°C.
10 Warranty period
If the user complies with the storage, transportation, storage and use conditions specified in the manual, the manufacturer shall be responsible for free repair or replacement of the welding torch for 6 months from the date of use, but within 12 months from the date of shipment from the manufacturer, if the welding torch is damaged or malfunctions due to poor manufacturing. 201
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