A method for reducing the unqualified rate of crimping of large-section wire tension clamps

Abstract

The invention relates to a method for reducing crimping reject ratio of large-section lead strain clamp, comprising steps of (1) preparing a clamp, (2) getting off the lead, (3) cleaning the clamp,(4) wearing the lead into a tube, (5) crimping a steel core, (6) crimping the clamp, and (7) measuring date, the crimping sign is marked on the clamp during the clamp preparation process in step (1), after wearing the lead into the tube instep (4) and before crimping the steel core in step (5), a locating post for crimping the clamp is manufactured, multiple clamp locating posts are fixedly fixed at the position of the lead in interval, and the clamp locating posts have the same height. The crimping mark is marked on the clamp beforehand in the invention, so that the construction crew can control the distance accurately when pushing the clamp to be crimped. The construction method is simple and convenient for the operation of site construction crew, and the construction period is not affected. After the improvement, the reject ratio of the construction quality caused by greater distance between the adjacent models and different control distances is reduced, and the efficiency of construction is improved.

Description

technical field [0001] The invention belongs to the construction field of substations, in particular to a method for reducing the unqualified rate of crimping clamps of large cross-section conductors. Background technique [0002] In the electrical installation construction, it is often necessary to crimp the tension clamp. Ensuring the crimping pass rate of the tension clamp is an important issue to ensure the overall construction progress. The current construction process is: wire clip preparation → wire off-line → wire clip cleaning → wire threading → steel core crimping → wire clip crimping → data measurement. According to the 2012 edition of "Standard Technology for Power Transmission and Transformation Engineering of State Grid Corporation", the main criteria for crimping of clamps are as follows: 1) The bending degree of the aluminum tube is less than 2%. 2) There are no broken strands or scattered strands in the wire. 3) The overlap between two adjacent molds is no...

AI Technical Summary

Problems solved by technology

[0005] 1) Improper crimping method: the sequence of the crimping process and the number of crimping meet the construction requirements, but the distance between the two adjacent dies is quite different due to the difference in distance control when the construction personnel push the wire clamp for crimping, and the maximum error is 40mm

[0006] 2) The levelness of the steel-reinforced aluminum wire is not enough: the weight of the large cross-sectional area wire is affected by its own weight during the crimping process, and the simple construction measures cannot meet the levelness requirements of the crimping process of the strain clamp, resulting in a bending degree of the crimped aluminum tube greater than 2 %, at the same time there is also the phenomenon of scattered stocks, so that the unqualified rate is 10%

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