This standard specifies the structural type and size series of riveted silver-copper composite contacts (hereinafter referred to as contacts). This standard applies to composite contacts selected for protection relays and control relays in secondary circuits of power systems. JB/T 4310-1999 Structural type and size series of riveted silver-copper composite contacts JB/T4310-1999 Standard download decompression password: www.bzxz.net

JB/T4310-1999
JB/T 4310-1999
In order to save precious metal silver, riveted silver-copper composite contacts have been widely used in the electrical field. According to the needs of protection relays and control relays in the secondary circuit of the power system for silver-copper composite contacts, JB4310-86 riveted silver-copper composite contact structure type and size series (first edition) is specially formulated
This standard is a revision of JB4310-86. During the revision, it was edited in the format according to the requirements of GB/T1.1--1993, and the basic content remained unchanged. Appendix A (supplement) of the original standard is taken from GB/T2828-1981. Since GB/T2828-1981 has been replaced by GB/T2828-1987, this revision cancels the appendix and directly quotes GB/T2828-1987 in the relevant sampling method clauses. This standard is a recommended standard. This standard replaces JB4310-86 from the date of implementation. This standard is proposed and coordinated by the National Technical Committee for Standardization of Measuring Relays and Protection Equipment, and is drafted by Xu Weiwei Electric Appliance Research Institute. The main drafters of this standard are Tian Xin and Yang Wei. 10
Mechanical Industry Standard of the People's Republic of China
Riveted silver-copper composite contacts
Structure type and dimension series for silver contact based on copper of riveting
JB/T4310-1999
Replaces JB4310-86
20002268
This standard specifies the structural type and size series of riveted silver-copper composite contacts (hereinafter referred to as contacts). This standard applies to composite contacts selected for protection relays and control relays in secondary circuits of power systems. 2
Cited 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 use of the latest versions of the following standards Possibility. GB/T2828-1987 Batch inspection counting sampling procedure and sampling table 3
Contact structure type and size series
Spherical circular contact structure type and size series are shown in Figure 1 and Table 1. Figure 1
Approved by the State Machinery Industry Bureau on August 6, 1999 and implemented on January 1, 2000
JB/T4310-1999
(reference value)
) When the L dimension is less than 1.5mm, the tolerance value is ±0.15; when the L dimension is greater than 1.5mm, the tolerance value is ±0.20. 3.2
Spherical cylindrical contact structure type and size series are shown in Figure 2 and Table 2. Ag
Note: The size restrictions in brackets are used, the same below. L
JB/T4310—1999
(reference value)
1) When the L dimension is less than 1.5mm, the tolerance value is ±0.15; when the L dimension is greater than 1.5mm. The tolerance value is ±0.20. The structural type and size series of the flat frustum cone contact are shown in Figure 3 and Table 3.3
JB/T43101999
1) When the L dimension is less than 1.5mm. The tolerance value is ±0.15; when the L dimension is greater than 1.5mm, the tolerance set is ±0.200.1
JB/T4310-1999
The structural type and size series of the composite spherical cylindrical contact are shown in Figure 4 and Table 4. Ag
When the contacts of the size series listed in Tables 1 to 4 are not used, the supply and demand parties shall negotiate to resolve. 4 Technical requirements
The surface roughness Ra of the silver layer of the contact head is 3.2Hm, and the surface roughness Ra of the rest is 6.3um. The diameter d of the contact tail is generally not less than D.
The coaxiality tolerance of the contact head diameter D and the contact tail diameter d is +0.1mm. The thickness t of the silver composite layer on the contact working surface is 0.1D≤t≤0.6T. The length L of the contact tail is generally: L=d, and the minimum value is L=d
The contact should be free of cracks, folds and bubbles, and the surface should be free of convex marks, missing edges, missing corners and other defects. The bonding strength of the bonding surface should be no less than 10kg/mm2. The bonding area should be greater than 80%, and there should be no concentrated and visible defects. The contact material silver is 99.9%, and the impurities do not exceed 0.1%: copper is No. 1 copper or No. 2 copper. 15
JB/T4310-1999
1) Due to the different riveting processes of each factory, the size of the special one shall be negotiated by the supply and demand parties; 2) .t is the thickness of the silver layer at the other end of the three-composite, and this standard recommends 0.3~1.5mm; 0
(reference value)
3) When the L size is less than 1.5mm, the tolerance value is ±0.15; when the L size is greater than 1.5mm, the tolerance value is ±0.2016
5.1 Composite contact marking method
JB/1-4310--1999
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A×A+Ax2TP.a
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Contact composite layer thickness
Contact head diameter D×height T+tail diameter d×tail length TContact shape (expressed in Chinese phonetic symbols)Contact material name (expressed in chemical symbols), C represents contact threeComposite contact marking method
·CA/A/A
A×A+A×A
Contact composite layer thickness t/13
Contact head diameter D×height T+tail diameter d×tail length LContact shape (expressed in Chinese phonetic symbols)Contact material name (expressed in chemical symbols), C represents contact 5.3Contact shape marking adopts Chinese phonetic letter symbol representation method, as shown in Table 5. 5.4Contact material representation method adopts chemical symbols. a) Material representation example of silver-copper composite contact is: Ag/Cu; b) Material representation example of silver-copper-three composite contact is: Ag/Cu/Ag. For contact marking examples, see Table 6.
Reference ball column·
Contact material
Ag/Cu/Ag
Contact shape
Symbol
Marking method
CAg/CuQY2×0.7+1×1.20.4
CAg/CuQZ3×1+2×2~0.8
CAg/CuPT 5×1+2.5×2-0.8
CAg/Cu/AgSQZ4×1+2×20.7/1.417
6 Inspection method
JB/T4310-1999
6.1 For dimensional inspection, the manufacturer may take samples according to the quantity specified in Table 3 of GB/2828-1987. 6.2 Check the diameter D of the head and the diameter d of the tail, the height T and the length L of the silver-copper composite contact with a vernier caliper with a groove of 0.02mm and an outside micrometer or a sample mold with an accuracy of 0.01mm. 6.3 The radius of the spherical surface and arc surface of the silver-copper composite contact is tested with a radius gauge, a ball diameter gauge or a projector. 6.4 Check the thickness t of the composite layer on the working surface of the silver-copper composite contact, and take the average value of the measured values ​​of the center line of the longitudinal section and the three points outside the two edges: use a metallographic microscope with a measuring scale, a tool microscope or a projector for testing. The specific measurement position is shown in Figure 5. Xie Measuring point
6.5 Check the coaxiality deviation of the silver-copper composite contact with a sample mold, a projector or a center surface cut perpendicular to the working surface, which is polished by grinding, and then checked with a metallographic microscope with a measuring scale and a tool microscope. 6.6 The surface roughness inspection of silver-copper composite contacts shall be carried out by comparison with sample blocks or by microscope inspection of surface roughness (smoothness). 6.7 The surface defect inspection of silver-copper composite contacts shall be carried out under normal lighting and visual conditions. 7 Acceptance
7.1 The acceptance specified in this standard mainly refers to some specific requirements for the acceptance of contact products by contact units. 7.2 The head diameter D, tail diameter d, length L and height T of silver-copper composite contacts shall be inspected in batches according to the requirements of GB/T2828-1987. Sampling shall be carried out according to the secondary normal inspection sampling plan and the general inspection level of Level II. 7.3 The head diameter D and length L of silver-copper composite contacts shall have a qualified quality level of 4.0, and the qualified quality level of thickness T shall be 2.Level 5. When the number of unqualified samples in the first random inspection is not greater than the first qualified judgment number (A,), the batch of contacts can be accepted; if the number of unqualified samples in the random inspection reaches or exceeds the first unqualified judgment number (R.), the batch of contacts should be rejected. If the number of unqualified samples in the random inspection is greater than the first qualified judgment number, but less than the first unqualified judgment number, a second sampling is conducted. When the total number of unqualified samples in the first and second samplings is less than or equal to the second qualified judgment number (A.) (i.e. 2×A.), the batch of products can be accepted; if the total number of unqualified samples in the first and second samplings reaches or exceeds the second unqualified judgment number (R.) (i.e. 2×A), the batch of contact products is rejected. The rejected contacts can be checked one by one, and the size qualified contacts are accepted: 7.4 The spherical surface, arc surface mountain radius, composite layer thickness, contact coaxiality deviation and contact surface roughness of the silver-copper composite contacts are regularly inspected, and each inspection shall not be less than 5.
7.5 Regular inspection is once a month. The inspection results serve as the basis for process planning and quality assessment.
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