Cutting by use of rotating axially moving tool – Including means to cause tool to progressively vibrate...
Patent
1976-05-05
1978-10-31
Simpson, Othell M.
Cutting by use of rotating axially moving tool
Including means to cause tool to progressively vibrate...
408137, B23B 2722, B23B 4718
Patent
active
041231872
ABSTRACT:
A peck-drilling apparatus for quill feed units of the type having a frame member and a tool quill of the type adapted for reciprocative movement with respect to said frame member, together with the usual means to rapidly advance a tool toward a workpiece preparatory to performing a machining operation thereon, means to slowly advance the tool while said machining operation is taking place, and means to rapidly retract said tool at the conclusion of said machining operation, wherein a peck-drilling operation is accomplished by providing a plurality of cam mounting bars fixedly mounted to the tool quill parallel to the axis of reciprocation and having various cams mounted thereon, said cams adapted to operate limit switches fixedly mounted to frame member as they pass thereby. The limit switches, together with a timer, are connected to the various operating means to rapidly advance the tool quill to the workpiece, feed the tool quill at a slow rate of speed for a time interval preset on the timer, and then to rapidly retract the tool quill to its original starting position and there-upon to return it to where the tool just finished cutting previously and again feed the tool for the preset time interval, and to repeat this cycle until the desired depth of cut is reached.
REFERENCES:
patent: 2178915 (1939-11-01), McKee et al.
patent: 2483712 (1949-10-01), Schafer
patent: 2776584 (1957-01-01), Burg
patent: 3129613 (1964-04-01), Burg
patent: 3637318 (1972-01-01), Hayes
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