| 摘要 |
An orbital welder includes a weld tip (618), a rotational controller (902), and a translational controller (620). The rotational controller (902) causes the weld tip (618) to rotate about an axis (622) passing through the tube (610) to be welded. As the weld tip (618) rotates about the axis (622), the translational controller (620) causes the weld tip (618) to move longitudinally with respect to the axis (622), forming non-planar orbital welds. In one embodiment, the translational controller (620) includes a roto r (614) disposed to rotate about the axis (622). The translational controller further includes a carrier (616) that is slidably attached to the rotor (614 ), and the weld tip (618) is fixed to the carrier (616). As the rotor (614) rotates about the axis (622), the carrier (616) moves longitudinally with respect to the axis (622), such that the weld tip (618) follows a non-planar orbital weld pattern. In a particular embodiment, a portion (808) of the carrier (616) is biased against a surface (626) of a cam block (620). The surface (626) of the cam block (620) is contoured to displace the carrier (616) longitudinally with respect to the axis of rotation as the rotor as th e rotor rotates about the axis (622).
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