Cutting by use of rotating axially moving tool – Machine including plural tools – Plural – simultaneously operational tools
Patent
1978-04-24
1980-01-29
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
Machine including plural tools
Plural, simultaneously operational tools
408 12, B23B 3916
Patent
active
041859430
ABSTRACT:
Disclosed herein is a machine tool which is particularly adapted for drilling and tapping holes in electric motor pole pieces with a center drill, drill and tap which are sequentially applied to the same hole. The spindle for each tool is provided with its own feed motor and drive motor, and each spindle moves vertically independently of the other for the successive machining operations. The drill and tap spindle frames are connected to horizontal lead screws so they can be moved laterally with respect to the center drill for variable hole spacing. Proportionate spacing is provided so that the drill is always intermediate and equally spaced from the center drill and tap to easily accommodate different size pole pieces which have different spacing requirements of the mounting holes. Feed control of each of the spindles is provided by a work surface probe which has a rod slideably supported on each spindle frame so that engagement of the probe with the surface of the pole piece will cause the probe rod to shift through mounting slides and actuate limit switches which change the feed from rapid feed to machining feed. Limit switches are also actuated to stop feed when the selected machining depth has occurred and initiate reverse feed to withdraw the tool from the work material. The arrangement for feeding and driving the spindles affords compact positioning of the spindles so that the center distance of each of the tools can be as close as three inches.
REFERENCES:
patent: 1835539 (1931-12-01), Thomas
patent: 1977202 (1934-10-01), Palkowski et al.
patent: 3127661 (1964-04-01), McConnell
patent: 3529496 (1970-05-01), Haley
Ameco Corporation
Weidenfeld Gil
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