Cutting tool compensator for stationary machine tool
First Claim
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1. A machine tool holder circumscribing a longitudinal axis of rotation and adapted for having coupled thereto at least one cutting tool which is adjustable radially of said axis, said machine tool being of the type wherein said at least one cutting tool cuts a rotating workpiece and comprising:
- a housing circumscribing said axis;
a block member having a cavity therein, circumscribing said axis and being coupled to said housing for radial movement relative to said axis, said block member being adapted for having coupled thereto said at least one cutting tool;
a drawbar which extends along said axis and is reciprocatably mounted within said housing and said cavity;
a roller screw mounted within said housing, said screw including a leadscrew spindle extending along said axis and at least one nut body operatively coupled thereto;
means coupling said drawbar to said leadscrew spindle for reciprocating said drawbar along said axis when said leadscrew spindle moves along said axis;
means operatively coupling said drawbar and said block member for causing said radial movement of said block member when said leadscrew spindle moves along said axis; and
,means coupled to said at least one nut body for controllably rotating said at least one nut body to allow for the selective longitudinal movement along said axis of said leadscrew spindle and drawbar coupled thereto so that fine adjustments can be made in radially positioning said block member during a cutting operation.
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Abstract
A machine tool of the type wherein a non-rotating cutting tool cuts a workpiece which rotates about a longitudinal axis of rotation. The machine tool includes a block member having the cutting tool attached thereto, the block member being coupled to a housing for radial movement of the block member and cutting tool in response to axial movement of a roller screw spindle internal of the housing.
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Citations
20 Claims
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1. A machine tool holder circumscribing a longitudinal axis of rotation and adapted for having coupled thereto at least one cutting tool which is adjustable radially of said axis, said machine tool being of the type wherein said at least one cutting tool cuts a rotating workpiece and comprising:
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a housing circumscribing said axis; a block member having a cavity therein, circumscribing said axis and being coupled to said housing for radial movement relative to said axis, said block member being adapted for having coupled thereto said at least one cutting tool; a drawbar which extends along said axis and is reciprocatably mounted within said housing and said cavity; a roller screw mounted within said housing, said screw including a leadscrew spindle extending along said axis and at least one nut body operatively coupled thereto; means coupling said drawbar to said leadscrew spindle for reciprocating said drawbar along said axis when said leadscrew spindle moves along said axis; means operatively coupling said drawbar and said block member for causing said radial movement of said block member when said leadscrew spindle moves along said axis; and
,means coupled to said at least one nut body for controllably rotating said at least one nut body to allow for the selective longitudinal movement along said axis of said leadscrew spindle and drawbar coupled thereto so that fine adjustments can be made in radially positioning said block member during a cutting operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18)
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14. A cutting machine comprising:
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a workpiece holder; means attached to said holder for rotating said holder about a longitudinal axis of rotation; a machine tool holder circumscribing said axis and adapted for having coupled thereto at least one cutting tool which is adjustable radially of said axis such that a cutting edge of said cutting tool is caused to engage and disengage said workpiece, said machine tool comprising; a housing circumscribing said axis; a block member having a cavity therein, circumscribing said axis and being coupled to said housing for radial movement relative to said axis, said block member being adapted for having coupled thereto said at least one cutting tool; a drawbar which extends along said axis and is reciprocatably mounted within said housing and said cavity; a roller screw mounted within said housing, said screw including a leadscrew spindle extending along said axis and at least one nut body operatively coupled thereto; means coupling said drawbar to said leadscrew spindle for reciprocating said drawbar along said axis when said leadscrew spindle moves along said axis; means operatively coupling said drawbar and said block member for causing said radial movement of said block member when said leadscrew spindle moves along said axis; and
,means coupled to said at least one nut body for controllably rotating said at least one nut body to allow for the selective longitudinal movement along said axis of said leadscrew spindle and drawbar coupled thereto so that fine adjustments can be made in radially positioning said block member during a cutting operation.
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19. A machine tool circumscribing a longitudinal axis of rotation and adapted for having coupled thereto at least one cutting tool which is adjustable radially of said axis, said machine tool being of the type wherein said at least one cutting tool cuts a rotating workpiece and comprising:
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a housing circumscribing said axis; a block member having a cavity therein, circumscribing said axis and being coupled to said housing for radial movement relative to said axis, said block member being adapted for having coupled thereto said at least one cutting tool; a drawbar which extends along said axis and is reciprocatably mounted within said housing and said cavity; a roller screw mounted within said housing, said screw including a landscrew spindle extending along said axis and at least one nut body operatively coupled thereto, said roller screw being so mounted that rotary motion of said at least one nut body about said axis causes movement of said leadscrew spindle along said axis; means coupled to said at least one nut body for controllably rotating said at least one nut body; means coupling said drawbar to said leadscrew spindle for reciprocating said drawbar along said axis in response to movement of said leadscrew spindle along said axis; and
,means operatively coupling said drawbar and said block member for causing said radial movement of said block member in response to reciprocation of said drawbar, said operatively coupling means including a camming surface on a portion of said drawbar extending into said cavity and a cam follower extending between said block member and said camming surface, and further including a slecve internal of and extending between said housing and said cavity, and wherein said drawbar reciprocates within said sleeve, said sleeve including an aperture therethrough adjacent said camming surface, and further wherein said cam follower includes a ball extending from said block member through said aperture and engaging said camming surface.
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20. A cutting machine comprising;
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a workpiece holder; means attached to said holder for rotating said holder about a longitudinal axis of rotation; a machine tool circumscribing said axis and adapted for having coupled thereto at least one cutting tool which is adjustable radially of said axis such that a cutting edge of said cutting tool is caused to engage and disengage said workpiece, said machine tool comprising; a housing circumscribing said axis; a block member having a cavity therein, circumscribing said axis and being coupled to said housing for radial movement relative to said axis, said block member being adapted for having coupled thereto said at least one cutting tool; a drawbar which extends along said axis and is reciprocatably mounted within said housing and said cavity; a roller screw mounted within said housing, said screw including a leadscrew spindle extending along said axis and at least one nut body operatively coupled thereto, said roller screw being so mounted that rotary motion of said at least one nut body about said axis causes movement of said leadscrew spindle along said axis; means coupled to said at least one nut body for controllably rotating said at least one nut body; means coupling said drawbar to said leadscrew spindle for reciprocating said drawbar along said axis in response to movement of said leadscrew spindle along said axis; and
,means operatively coupling said drawbar and said block member for causing said radial movement of said block member in response to reciprocation of said drawbar, said operatively coupling means including a camming surface on a portion of said drawbar extending into said cavity and a cam follower extending between said block member and said camming surface, and further including a sleeve internal of and extending between said housing and said cavity, and wherein said drawbar reciprocates within said sleeve, said sleeve including an aperture therethrough adjacent said camming surface, and further wherein said cam follower includes a ball extending from said block member through said aperture and engaging said camming surface.
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Specification