Stranding process
1. The diameter of single wire shall be checked before online production, and the diameter deviation of single wire must be within the range specified by the process;
2. Check the appearance quality of the single wire, which should be smooth and clean, free of oil stain, serious mechanical damage, and copper wire free of serious oxidation;
3. Check whether the selected pressing wheel, wood mold and steel mold meet the process requirements;
4. Check the number, arrangement, stranding pitch and stranding direction of stranded single wires, which shall comply with the process regulations;
5. Check the geometric dimensions of the stranded compression core, which shall comply with the process regulations;
6. Check the appearance quality of the wire core, which shall be compact and round, without damage to the burrs and sharp edges of the insulation layer, and without raised and broken single wires;
7. Check the single line joints, which must be welded, and the distance between two joints shall not be less than 300mm;
8. Check the quality of cable arrangement, and ensure that it is flat without crossing or stacking.
Insulation process
1. Check whether the selected mold meets the process requirements;
2. Check the thickness of the insulation layer. The average value of six points and the thinnest point shall comply with the process regulations;
3. Check the identification mark of insulated wire core, and the colored mark shall be clear in color; The digital signs are clear and wear-resistant; The identification of finished cable shall be clear and continuous, and the content shall meet the requirements of process and plan;
4. Check the quality of the insulation layer. It is required that the insulation layer should be plasticized well, the appearance should be smooth, and there should be no visible bubbles, impurities, and cracks;
5. Check the extrusion quality. The insulation layer shall be tightly extruded on the conductor, and no flattening, bruise, bulge, loose sleeve, or crease is allowed;
6. Check the implementation of spark test. It is required that all insulated wire cores must pass spark test and the applied test voltage should comply with the process regulations;
7. Insulated wire cores that have been broken down by spark test must be rewound, repaired, and spark tested again, or they are not allowed to flow down.
8. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Cross linking process
1. Check whether the selected mold meets the process requirements;
2. Check the thickness of the inner and outer semiconductors, and the thinnest point shall comply with the process regulations;
3. Check the insulation thickness. It is required to check each axle of cable, and its average value and thinnest point shall comply with the process regulations;
4. Each axle of cable shall be subject to cross-linking test, and the test results shall comply with the process regulations;
5. Check the appearance quality of the insulation layer. The surface shall be flat, free of bamboo knots, bubbles and impurities;
6. Check the surface quality of external semiconductor, which shall be smooth and flat without impurities, wrinkles and scratches.
7. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Shielding process
1. Check the number, direction and overlap rate of copper tape wrapping layers, which should conform to the process regulations;
2. Check the quality of wrapping, which shall be flat and tight, without wrinkles, curling, missing wrapping and bumping defects;
3. Check the copper strip welding quality, and the copper strip joint must be welded;
4. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Cabling process
1. Check the arrangement, pitch and direction of insulated cable cores, which shall comply with the process regulations;
2. Check the specification, size, number of layers and wrapping method of wrapping tape, which should conform to the process regulations;
3. Check the appearance quality after cabling, and ensure that the wrapping tape is tight and free of any discount, damage or missing wrapping; The filling shall be full, the cable appearance shall be round, and the out of roundness shall meet the process requirements.
4. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Spacer sleeve
1. Check whether the selected mold meets the process requirements;
2. Check the thickness of the isolation sleeve, and the thinnest point shall comply with the process regulations;
3. Check the appearance quality of the isolation sleeve, which shall be round and free of loose sleeve, bulge and leakage;
4. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Kaining process
1. Check the specifications, dimensions, layers, wrapping direction and wrapping clearance of the steel strip, which shall comply with the process regulations;
2. Check the welding quality of the steel strip. It is required that the steel strip joints must be welded, and the joints should be flat and firm, without burrs, warping edges, and holes;
3. Check the wrapping quality, which shall be round and tight, and there shall be no missing wrapping;
4. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
Outer sheath
1. Check whether the selected mold meets the process requirements;
2. Check the sheath thickness, and the thinnest point shall meet the process regulations;
3. Check the quality of the protective layer, and there shall be no poor plasticization, scorching, bubbles and impurities;
4. Check the appearance of the sheath. It is required that the sheath shall be tightly squeezed and wrapped on the cable core, and the surface shall be round and smooth without flattening, loose sleeve, bulge, missing package or scratch;
5. Check the cable identification marks, which shall be clear and continuous, and the contents shall meet the requirements of the process and plan;
6. Check the implementation of spark test. It is required that the outer sheath of armored cable must pass the spark test, and the test voltage shall comply with the process regulations;
7. Check the quality of cable arrangement, which shall be flat and free from cross and stacking.
