论文部分内容阅读
气流纺机框架结构件是某大型纺机厂自行设计的重要零部件且用量较大,该部件由左右两块350×400mm厚3mm激光切割成型A3板之间有一个斜拉连接件三个垂直连接件焊接而成。该框架结构件上装有高速运转纱筒和其他机件,设计要求框架不但有足够的强度而且有较高的尺寸精度和平面度。作者通过对气流纺机框架结合件结构特点和焊接过程热变形温度场、应力场的分析、与原设计焊接方案的焊接结果比较,对原设计焊接方案进行了更改,采取了榫孔焊接方式、选择最佳焊接顺序、预除氧化层和氩气保护措施,用5000WCO2激光器在3000W功率下进行激光连续热传导焊接.在焊接过程中不需要施加任何外力定位,无预应力的影响,因而焊接变形微小,工艺具有较高的稳定性、可靠性。工艺实验在西门子数控五轴四联动激光焊接机床上进行,程序自动化、工作效率高,产品一致性好。激光焊接后的框架结构件平面最大变形小于0.2mm,与原设计焊接方案的实验结果比较,平整度提高5倍以上,焊缝均匀平整、焊缝熔深0.9-1mm,宽度1.75mm,强度达到设计要求。
Aero-spinning machine frame structure is a large-scale textile machinery factory design of the important components and a large amount of use, the components from left and right two 350 × 400mm thick 3mm laser cutting A3 plate between a cable-stayed connection three vertical Connection made of welded. The frame structure is equipped with high-speed operation of the bobbins and other parts, the design requirements of the framework not only have sufficient strength and high dimensional accuracy and flatness. Based on the structural characteristics of the frame fastener and the analysis of the thermal field and stress field during the welding process, the author compared the welding results with those of the original designed welding scheme. The original design welding scheme was modified and the dowel hole welding method was adopted. Select the best welding sequence, pre-oxide and argon protection measures, with 5000WCO2 laser power at 3000W laser continuous heat conduction welding in the welding process does not require any external force positioning, no prestressing, and thus welding deformation is small , Process has high stability, reliability. Process experiments in Siemens CNC five-axis quadruple laser welding machine, the program automation, high efficiency, good product consistency. The maximum deformation of the frame structure after laser welding is less than 0.2mm. Compared with the experimental results of the original design welding scheme, the flatness is improved by more than 5 times. The welding seam is even and smooth. The weld penetration is 0.9-1mm and the width is 1.75mm. Design requirements.