河南科技大学学报（自然科学版）2025，Vol.46Issue(6)：20-26,7.DOI:10.15926/j.cnki.issn1672-6871.2025.06.003
鸭嘴型端子弹臂长度对插拔循环力学特性及接触电阻的影响
Effects of Spring Arm Length on Mechanical Properties and Contact Resistance of Duckbill Terminals after Multiple Insertion-Extraction Cycles
摘要
Abstract
Duckbill terminals often degrade after multiple mating cycles.Key issues include significant wear,enlarged blade gap,higher contact resistance,and elevated temperature rise.This study combines theoretical analysis with indoor single-factor tests to examine how terminal spring arm(TSA)length(L)affects mechanical and electrical performance over multiple mating cycles.Results show that reducing the L amplifies changes in plug force,minimum gap of the spring arm,and surface roughness under different cycles.However,it also significantly reduces contact resistance(p<0.05).Terminals with L≤3.3 mm showed a noticeable resistance increase after 100 cycles.Still,their resistance remained much lower than those with L≥4.3 mm.After 500 cycles,terminals with L≥3.8 mm exhibited increased contact resistance.A longer TSA led to a slower rise in resistance over cycles.Although longer TSAs reduced wear and spring arm gap,contact resistance was higher.This indicates that TSA length affects contact resistance more than spring arm gap or surface roughness.To enhance plug force and maintain low contact resistance after multiple mating cycles of duckbill terminals,it is advisable to use a shorter TSA length—preferably L≤3.3 mm.关键词
鸭嘴型端子/弹臂长度/多次插拔循环/力学特性/接触电阻Key words
duckbill terminal/spring arm length/multiple mating cycles/mechanical properties/contact resistance分类
交通工程引用本文复制引用
王学振,赵平堂,王武军,王志广,李强,姬江涛..鸭嘴型端子弹臂长度对插拔循环力学特性及接触电阻的影响[J].河南科技大学学报（自然科学版）,2025,46(6):20-26,7.基金项目
国家自然科学基金项目(32401718) （32401718）
河南科技大学博士科研启动基金项目(13480042) （13480042）
河南天海电器有限公司博士后科研项目(K-810-017-2024) （K-810-017-2024）
