本文選題：材料 + 光纖激光��； 參考：《中國激光》2015年09期

【摘要】：利用光纖激光研究了環(huán)形激光束的形成原理,并利用環(huán)形激光束實現了高分子材料的超高速焊接。試驗結果表明,隨著準直鏡焦距的增加,環(huán)形激光束的外徑不變,內徑減小,環(huán)形激光束的光環(huán)寬度增加;隨著第一枚圓錐透鏡和第二枚圓錐透鏡的間距L12增加,環(huán)形激光束的內徑和外徑同時增加,而環(huán)形激光束的光環(huán)寬度幾乎不變;通過準直鏡、第一枚圓錐透鏡及第二枚圓錐透鏡的同軸性調節(jié),可獲得能量密度分布均勻的環(huán)形激光束;利用外部直徑為54 mm、內部直徑為47 mm及寬度為3.5 mm的環(huán)形激光束,對厚度為(2+1)mm的高分子材料搭接接頭實現了超高速焊接。當試驗壓力為100 N,激光輸出功率為800 W,焊接時間為0.6 s時,高分子材料焊接接頭拉伸剪切性能與母材相同,其拉伸剪切斷口位于母材(TPV-彈性體)上。
[Abstract]:The forming principle of ring laser beam is studied by using fiber laser, and the super high speed welding of polymer material is realized by using ring laser beam. The experimental results show that with the increase of the focal length of the collimating mirror, the outer diameter of the ring laser beam remains the same, the inner diameter decreases, and the ring width of the ring laser beam increases, and with the increase of the distance between the first conical lens and the second conical lens, The inner and outer diameter of the ring laser beam increases simultaneously, while the ring width of the ring laser beam is almost unchanged; the coaxiality of the first conical lens and the second conical lens is adjusted by collimating mirror, The ring laser beam with uniform energy density distribution can be obtained. Using the annular laser beam with the outer diameter of 54 mm, the inner diameter of 47 mm and the width of 3.5 mm, the superhigh speed welding of the lap joint of polymer material with thickness of 2 1)mm is realized by using the ring laser beam with the outer diameter of 54 mm, the inner diameter of 47 mm and the width of 3.5 mm. When the test pressure is 100N, the laser output power is 800W and the welding time is 0.6 s, the tensile shear properties of the welded joints are the same as that of the base metal, and the tensile shear fracture is located on the base metal TPV-elastomer.
【作者單位】： 沈陽工業(yè)大學材料科學與工程學院;鞍山煜宸科技有限公司;
【基金】：遼寧省科技創(chuàng)新重大專項計劃(201411004)
【分類號】：TG665;TG456.7

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