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Quality standards of the beam line, stranding
Publisher：admin Time：2012/4/26 8:17:49 Browse：925
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1, the quality standards of the beam line
l) Appearance
Stranded after the beam line, in-line surface should be smooth, no obvious mechanical damage, no oxidation discoloration, not loose shares back shares. Tinned wire core surface requires a uniform color, smooth, and can not have dark spots, uniform tin coating should not be tainted plated.
2) Size
Single line should be round, there should be no obvious pull fine, pull the fine must be within the limits prescribed in the standard, the outside diameter of the beam line should be within the technological requirements.
3) The structure and composition
The beam line may not have the lack of roots, root pruning, pine shares, ride shares, beam line surface if slightly rub the hair, you can still make a qualified product. The structure and composition must meet the technical requirements.
4) The pitch of the beam line and beam system direction should be specified.
5) Welding
Beam co-conductor, does not allow the entire core welding, but the singlet allow welding, the welding head distance of not less than 300mm, foreign economic relations of the welding head no more than 2 times the tolerance of the absolute value of complex stranded with strands allows the welding, the welding head distance not less than 1m, the welding head light repair, round file, the welding head diameter must not exceed the nominal diameter of 0.2mm and the following six kinds of single-line of the beam line allow the twist, but not a feather, wire core should smooth.
6) transfer to a plate
Into conductive wire core cable tidy, flat, no drum-type and line core pressure each other overlapping phenomena.
2, wire quality standards
l), appearance
Stranded appearance should be smooth, without triangular mouth, cracks, spots, scars and inclusion, the pitch is uniform and neat, not obvious mechanical damage, copper stranded conductor shall not oxidative discoloration and dark spots. Tinned wire core requirements, uniform color, bright, not dark spots and uncoated.
2), size
Composed of stranded single-earn the fine amount must be within prescribed limits, stranded outside diameter shall meet the technical requirements.
3), the structure and composition
The structure and composition of the strands and finished DC resistance should be consistent with the provisions of GB/T3956- 1997 cable conductor). Lack of roots, and fewer shares off shares, pressure stack, and the eccentricity of the fan-shaped wire core pressure can not exceed 10%.
4), pitch and twist should be consistent with the process requirements.
5), the state, in addition to the overhead insulated wire with the hard copper conductor, and the remaining copper conductor must be annealed condition.
6) multi-layer stranded from the inside to the outside pitch gradually reduced, and the same layer pitch consistent, stranded layers should be the opposite.
7) two kinds of sections 5, 6 kinds of conductors does not allow the entire core welding, simply wire or strands allows welding, weld diameter should be not more than 2 times the deviation of the absolute value is not greater than the outer diameter of the beam line welding head The nominal diameter of 0.2mm, the distance of the same layer or adjacent layers of the welding head is not less than 300mm.
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