| 摘要 |
A friction stir welding machine (20) includes a table (26) for supporting parts (28, 30) to be welded and a frame (22) extending over the table. A first drive (65) is supported by a first element (44) of the frame and is operatively connected to a spindle (62) having a tool (94). The first drive moves the tool in a first direction, and the first drive disengages from the spindle after the tool contacts the material. A second drive (78) is supported by a second element (46) of the frame and is operatively connected to the spindle for moving the tool into the parts at a joint (32), thereby initiating friction stir welding process. The friction stir welding machine has a pair of rollers (97) mounted in a roller support (100) with an axis of rotation substantially perpendicular to an axis of rotation of the tool. The rollers contact a surface of the material in response to the tool penetrating the material to a desired depth. The roller support is pivotally mounted to the spindle and has a pivot axis substantially perpendicular to both an axis of rotation of the rollers and the axis of rotation of the tool. The work supporting table of the friction stir welding machine has a vacuum hold down system (123) for securing the parts to the table. |
