Apparatus for making numerous holes in a tube
OwnerMichael F. Sicainventor
Life of this patent
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Abstract
Apparatus for making numerous spaced-apart, radial holes in a tube includes a rotary index table that rotates intermittently through predetermined index angles of rotation and dwells between each rotation. A mandrel affixed to the index table receives the tube telescopically and holds the tube in a fixed position relative to the mandrel. A pair of self-feed drilling units mounted on opposite sides of the mandrel have output shafts that are driven intermittently in reciprocating motion along axes lying in a common plane with the longitudinal axis of the tube, the axis of each output shaft being perpendicular to the longitudinal axis of the tube. Each output shaft carries a multiple-spindle head, and each spindle of the multiple-spindle head receives a drill bit.
Claims15
Apparatus for making numerous spaced-apart radially extending holes in a tube comprising
- a rotary index table that is adapted to be rotated intermittently through predetermined index angles of rotation about a table axis and to dwell between each rotation;
- a mandrel affixed to the index table and adapted to be received telescopically within an end portion of the tube and hold the tube in a fixed position relative to the mandrel with the axis of the tube coaxial with the table axis;
- a pair of self-feed drilling units mounted symmetrically on opposite sides of the mandrel, each in a fixed position relative to the index table, and having output shafts driven intermittently in reciprocating motion along axes lying in a common plane with the axis of the tube, the axis of each output shaft being perpendicular to the axis of the tube;
- and
- a multiple-spindle head carried by each of the output shafts of the drilling units, each spindle of the multiple-spindle head carrying a drill bit.
Apparatus for making numerous spaced-apart holes in a tube comprising
- rotary index table that is adapted to rotate intermittently through equal index angles of rotation about a table axis and to dwell between each rotation;
- a mandrel affixed to the index table for rotation therewith, the mandrel being adapted to be received telescopically within an end portion of the tube, to hold the tube against movement relative to the mandrel by means of a resilient O-ring that is received in a ring-groove on the mandrel and forms an interference fit with the inner surface of the tube, and to position the tube longitudinally by means of a stop shoulder that is engaged by the end of the tube;
- a pair of self-feed drilling units mounted symmetrically on opposite sides of the mandrel and having output shafts driven intermittently in reciprocating motion along a common axis lying perpendicular to the longitudinal axis of the tube, each drilling unit being set up to move the output shaft thereof through a cycle toward and away from the tube during each dwell of the index table;
- and
- a multiple-spindle head carried by each of the output shafts of the drilling units, each spindle of the multiple-spindle head carrying a drill bit.
Dependencies are inferred from the claim text.