Plunge Force Measurement and Analysis of 6061-T6 Aluminum Alloy Refill Friction Stir Spot Welding

Jinbiao ZHANG; Rui WANG; Weilu ZHOU; Baode LI; Tao LIANG; Li ZHOU

doi:10.7512/j.issn.1001-2303.2022.07.15

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Plunge Force Measurement and Analysis of 6061-T6 Aluminum Alloy Refill Friction Stir Spot Welding
Vol. 52, Issue 7, Pages: 105-109(2022)
Received：16 October 2021，

Revised：2022-01-10，

Published：25 July 2022
DOI： 10.7512/j.issn.1001-2303.2022.07.15
稿件说明：

移动端阅览

张锦标，王瑞，周炜璐，等.6061-T6铝合金回填式搅拌摩擦点焊扎入力测量分析［J］.电焊机，2022，52（7）：105-109. DOI： 10.7512/j.issn.1001-2303.2022.07.15.

ZHANG Jinbiao, WANG Rui, ZHOU Weilu, et al.Plunge Force Measurement and Analysis of 6061-T6 Aluminum Alloy Refill Friction Stir Spot Welding[J].Electric Welding Machine, 2022, 52(7): 105-109. DOI： 10.7512/j.issn.1001-2303.2022.07.15.

摘要

通过实验对6061-T6铝合金回填式搅拌摩擦点焊下扎阶段的扎入力进行了测量，研究了焊接过程中扎入力的变化规律以及不同工艺参数对扎入力的影响规律。实验结果表明，下扎过程中扎入力呈先增大后减小的趋势。扎入力与扎入阶段摩擦产生的热量有密切关系，搅拌头转速越高，扎入速度越小，摩擦产热越多，被焊材料的热塑性程度越高，所需的扎入力越小。在所选工艺参数范围内，使用低转速（900 r/min）、大扎入速度（100 mm/min）的“冷态条件”，扎入力峰值最大，为12.63 kN；使用高转速（1 700 r/min）、小扎入速度（20 mm/min）的“热态条件”，扎入力峰值最，小为3.2 kN。扎入深度对扎入力的影响不大。

Abstract

The plunge force of 6061-T6 aluminum alloy refill friction stir spot welding was measured through experiments. The variation law of plunge force during welding and the effect of different process parameters on plunge force was studied. The experimental results show that the plunge force first increases and then decreases during the plunging process. The plunge force is closely related to the frictional heat generated in the welding process. The higher the rotation speed of the stirring head

the smaller the plunge speed

the more friction heat production

the higher the thermoplastic degree of the welded material

and the smaller the plunge force required. Within the range of selected process parameters

the "cold condition" of low speed (900 r/min) and large plunge speed (100 mm/min) is used

and the maximum plunge force is 12.63 kN; Use the "hot condition" of high speed (1 700 r/min) and small plunge speed (20 mm/min)

the maximum plunge force is 3.2 kN.The plunge depth has little effect on the maximum plunge force .

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