Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1977-03-04
1978-05-09
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
Processes
Bit detachable
408 43, 408 46, 408 52, 408137, 408240, 408234, B23B 3500, B23B 3916, B23B 4718
Patent
active
040884171
ABSTRACT:
A drill may be fed into a workpiece at a rate where the angle descent is less than the primary relief angle of the drill and wherein the extruding action takes place in 1/3 or less of the drill diameter. Unachieved rates of drill feed speed with high precision may be achieved without punching or crushing the material of the workpiece. In order to accomplish such drilling rates an improved feed mechanism, utilizing a positively driven lead screw is employed. In addition, in order to utilize the high drilling rate, a multiple bank of spindles is devised having an X-Y adjustable configuration used in combination with a worktable translated by a lead screw and nut combination. The lead screw of the worktable is disposed within the worktable in the proximity of the axis of symmetry to the worktable in order to minimize twisting moments to the worktable. An automated collet is utilized in each of the spindles together with tool holders to provide for automatic changing of the drill bits without operator intervention.
REFERENCES:
patent: 2796767 (1957-06-01), Carpenter
patent: 3246544 (1966-04-01), Cooper
Advanced Controls Corp.
Weidenfeld Gil
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