HOLE DRILLING DEVICE, AND METHOD

摘要

A hole drilling device and method provided with a drilling head (61), a plurality of hole drilling tools (63) detachably attached to the drilling head (61), a driving device (64) for allowing the drilling head (61) to move in the radial direction and axial direction of attachment holes (60) to be formed on a tube sheet (45), and a control device (65) for driving the driving device (64), wherein: the hole drilling tools (63) are disposed, in relation to the drilling head (61), along the arrangement direction of the attachment holes (60) and at an equal interval from one another, said interval being an integer multiple equal to or greater than double the pitch of the attachment holes (60); and the control device (65) drives the driving device (64) such that holes are drilled by means of the hole drilling tools (63) as the drilling head (61) moves with respect to each pitch of the attachment holes (60) in the arrangement direction of the hole drilling tools (63). As a consequence, it is possible to drill a plurality of holes at once and to improve the performance of the drilling operation.