US 4,400,859 AGranted

Machining centers for machining tubular workpieces

AssigneeKearney & Trecker Corporation

InventorsRobert T. Woythal, Philip J. Finet

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Abstract

A machining center for machining the interior of an elongate tubular workpiece includes a bed on which a rotatably indexable member is slidably mounted for movement on the bed along a first axis. Removably fastened on the indexable member in spaced parallelism are a first and second hollow bore spindles each engaging the exterior surface of a tubular workpiece whose interior is to be machined. The first spindle is rotatably driven to rotate the tubular workpiece about its axis responsive to machine tool control system commands slidably mounted on the bed for movement thereon along a path perpendicular to the path of member movement in an upright. Extending from the upright parallel to the axis of upright movement for insertion into the workpiece bore is an arm which is movable along the upright along a vertical direction. At the distal end of the arm is a right angle, high speed rotary driven cutting tool carrying spindle. By manipulating rotational movement of the tubular workpiece and by manipulating the translational movement of the arm, the upright and the bed, interior machining of the workpiece can easily be facilitated.

Claims4

Dependent claims

A machine tool for machining the interior surfaces of workpieces comprising:

a base;
a member movably supported on said base for movement along two mutually transverse paths;
an elongated arm extending forwardly from said movable member;
a spindle head supported by the extending end of said arm;
a cutter carrying spindle rotatably mounted in said spindle head with its axis disposed at an angle to the axis of said arm;
power means connected to rotate said cutter for performing a work operation on a workpiece;
a worktable movably supported on said base for movement along a path orthogonal to each of said two transverse paths of member movement;
a first plate fastened to said worktable;
a second plate overlying said first plate and being journaled on said first plate for rotation about an axis perpendicular to the axis of worktable movement;
a pair of guards, each extending outwardly opposite from one of the edges of said second plate to prevent human appendages from being scissored between said first and second plates when said second plate is rotated relative to said first plate;
a spring loaded pin disposed vertically through said first and second plates for releasably locking said first and second plates together to prevent rotation of said second plate relative to said first plate;
and
a first and second pair of spaced apart spindles rotatably mounted on said second plate for supporting the workpiece with its axis parallel to the axis of the arm to allow insertion of said spindle head into the workpiece so that said cutter can perform a work operation on the interior of the workpiece.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/219,529Filed 23 Dec 1980
Granted: 30 Aug 1983
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B23Q 1/4857
A single sliding pair followed perpendicularly by a single rotating pair: followed perpendicularly by a single rotating pair
B23Q 1/621
With perpendicular axes, e.g. cross-slides: a single sliding pair followed perpendicularly by a single sliding pair
B23Q 1/763
Steadies; Rests: rotating steadies or rests
B23Q 3/105
Auxiliary devices, e.g. bolsters, extension members: auxiliary supporting devices independent of the machine tool