| 摘要 |
Apparatus for reboring a damaged portion in the first of first and second bores (14,15) in a counterbored workpiece (12) contemplates a first pilot (35) for extending through the second bore and engaging the first bore interiorly of the damaged portion, a cylinder (41) for supporting and axially driving the first pilot and the workpiece, a second pilot (55) for engaging the first bore exteriorly of the damaged portion, a cylinder and motor (52) for supporting and axially driving the second pilot in opposed relation to the cylinder for supporting and axially driving the first pilot, whereby the first bore is concentrically aligned, and a boring device (53) mounted on the cylinder and motor for supporting and axially driving the second pilot for reboring a portion of the first bore in the workpiece. The method for repairing the bore of the workpiece includes the steps of mounting the workpiece on the first pilot engaging the first bore interiorly of the damaged portion, positioning the second pilot for engaging the first bore exteriorly of the damaged portion, driving the first and second pilots into closer positioning to effect concentric alignment of the first bore in the workpiece with the first and second pilots, simultaneously moving the first and second pilots to clamp the workpiece against a fixed plate while maintaining the concentric alignment of the first bore with the first and second pilots, disengaging the second pilot from the extremity of the first bore of the workpiece, and inserting a boring device into the extremity of the first bore for reboring the damaged portion thereof.
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