振动摩擦焊接的工艺条件对增强尼龙焊接头结构和力学性能的影响

The influence of Vibration Welding Technological Conditions on the Structure and Mechanical Properties of Reinforced Nylon Welding Head

将30％玻璃纤维与尼龙66共混改性树脂（增强尼龙，PA66＋30％GF）在一定注塑工艺条件下制备成用于焊接用的拉伸制件，经过振动摩擦焊接形成拉伸样条，通过二次元影像和万能试验机，研究振动摩擦焊接的工艺条件对增强尼龙焊接接头结构和力学性能的影响。结果表明，振动摩擦焊接时的振幅、压力、深度和时间对焊接接头结构和力学性能有着明显的影响，保持时间与保持压力对焊接接头结构和力学性能几乎没有影响。在适当的焊接条件下，振动摩擦焊接振幅为0．6mm，压力为4．5MPa，深度为1．2mm，焊接时间为5—6s，保持时间2s，保持压力3．0MPa时，得到的焊接样条焊缝质量较好，其拉伸强度为56．0MPa，达到增强尼龙基材拉伸强度的32．9％（增强尼龙拉伸强度170MPa），达到母体尼龙基材拉伸强度的68．3％（尼龙基材拉伸强度为82MPa）。

The welding tensile parts made from reinforced nylon 66 with 30% glass fiber were prepared by injection molding, and they were formed tensile samples by vibration friction welding. The influence of vibration welding technological conditions on the structure and mechanical properties of the reinforced nylon welded joint were studied by two dimensional image and universal testing machine. Results show that the amplitude of vibration, pressure, penetration and time have obvious effects on the structure and mechanical properties of the welded joint, while the holding time and maintaining pressure have little impact on the structure and mechanical properties of the welded joint. With appropriate welding conditions as follows： the amplitude of vibration of 0.6 ram, pressure of 4.5 MPa, penetration of 1.2 ram, welding time of 5 - 6 s, holding time of 2 s and maintaining pressure of 3.0 MPa, the joint of welding seam quality is good, the tensile strength is 56.0 MPa-32.9% of the tensile strength of reinforced nylon material （170 MPa）, and 68.3%of the tensile strength of raw nylon （82 MPa）.