超薄焊道宽高比对搭接平整度的影响
|
摘要
针对不同的宽高比焊道所对应的搭接率进行研究,通过采用二项式拟合得出焊道宽高比与搭接率的变化规律并找出对应的最佳搭接率。研究发现当采用大的宽高比进行搭接时,整体的焊道搭接误差比较小。同时还针对在同一搭接率的条件下,第一道焊道与第二道焊道,第二道焊道与后续焊道之间产生的焊丝与焊道中心不重合现象进行了理论分析,得出大的宽高比条件下,前一道熔化的焊道对后一道熔滴产生的作用力P_A相对小的宽高比条件来说要更小。
The overlap ratio of different ratio of welding beads width to height was studied. The variation law of the width to height ratio and the overlap rate was found out by using binomial fitting and the corresponding optimal lap rate was found.It is found that the overall weld overlap error is small when the large ratio of welding beads width to height is used. At the same time, under the same overlap rate, the phenomenon of non-coincidence between welding wire and weld bead center of the first and second beads and the second and subsequent beads was analyzed theoretically. It is concluded the force P_A of the previous melted weld on the latter droplet is smaller when the width to height ratio is larger than that when the width to height ratio is smaller.
The overlap ratio of different ratio of welding beads width to height was studied. The variation law of the width to height ratio and the overlap rate was found out by using binomial fitting and the corresponding optimal lap rate was found.It is found that the overall weld overlap error is small when the large ratio of welding beads width to height is used. At the same time, under the same overlap rate, the phenomenon of non-coincidence between welding wire and weld bead center of the first and second beads and the second and subsequent beads was analyzed theoretically. It is concluded the force P_A of the previous melted weld on the latter droplet is smaller when the width to height ratio is larger than that when the width to height ratio is smaller.
引文
[1]许可可,陈克选,仇文杰,等.等离子弧增材制造设备与其工艺研究[J].热加工工艺,2017,46(23):221-224.
[2]江祥胜,许燕,周建平,等.基于GMAW堆焊成形的堆焊层焊道搭接量及力学性能研究[J].热加工工艺,2017,46(11):28-31.
[3]Li Y,Sun Y,Han Q,et al.Enhanced beads overlapping model for wire and arc additive manufacturing of multi-layer multi-bead metallic parts[J].Journal of Materials Processing Technology,2018,252:838-848.
[2]江祥胜,许燕,周建平,等.基于GMAW堆焊成形的堆焊层焊道搭接量及力学性能研究[J].热加工工艺,2017,46(11):28-31.
[3]Li Y,Sun Y,Han Q,et al.Enhanced beads overlapping model for wire and arc additive manufacturing of multi-layer multi-bead metallic parts[J].Journal of Materials Processing Technology,2018,252:838-848.