The Boeing Company

Mcdonnell Douglas Corporation

Daniel C King

Thomas O Blankenship

David L Fritsche

James Morrison

Brian Joseph Martinek

An apparatus having a controllable dwell for drilling and or countersinking a hole in a workpiece is provided which generally comprises a feed mechanism, a retraction mechanism, and a dwell mechanism. The feed mechanism is configured to feed a spindle from a starting position to a predetermined feed limit during a feed cycle. The retraction mechanism is configured to retract the spindle from the feed limit to the starting position to complete the feed cycle. The dwell mechanism is in communication with the retraction mechanism and comprises a mechanical bias member that stores energy during at least a portion of the feed cycle, wherein the mechanical bias member releases at least a portion of the energy once the spindle reaches the feed limit. The retraction mechanism is only actuated once the spindle reaches the feed limit and the mechanical bias member releases at least a portion of the energy. A predetermined dwell period is thereby provided between the spindle reaching the feed limit and the retraction mechanism being actuated. An associated method is also provided.

Apparatus having a controllable dwell and associated method

An axial feed apparatus having an adjustable feed stop is provided. The axial feed apparatus generally comprises a power feed module having an adjustable stop mechanism engaged therewith, wherein the adjustable stop mechanism may comprise a spindle threadedly engaging the power feed module. An adjustable depth-controlling device is further included intermediate the spindle and the power feed module, which uses a series of calibrated graduations in communication with the spindle such that a rotational change in the engagement of the graduations moves the spindle by a predetermined axial distance and thereby adjust the position of the feed stop for the power feed module. Such a power feed module may be combined with a drill motor to produce a device capable of drilling/countersinking holes in a workpiece. A drilling/countersinking device is thus facilitated that is capable of providing a readily adjustable feed stop for positively controlling the depth of the drilled/countersunk hole in a consistent, accurate, and repeatable manner. An associated method is also provided.

Axial feed apparatus having an adjustable feed stop and associated method

A tool fixture,includes a body,and a plurality of attachment devices,connected to the body,. A passageway,is connected to the body,and in communication with at least two of the attachment devices,. A connector is in communication with the passageway,and the body,and is for attachment to a vacuum system such that when the vacuum system draws a vacuum the attachment devices,are urged against a work surface to hold the tool fixture,in place.

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Ballwin, MO, United States of America

Daniel C King