Work position adjusting apparatus and adjusting method

A method of adjusting a position of a work set in machine tool between a tool head and a work table, the method comprising:

• a. providing a base in the work table;
• b. supporting a mounting member on the base with a support structure;
• c. mounting the work on the mounting member;
• d. detecting first coordinate values related to an inclination of a first surface of the work relative to a plane containing mutually perpendicular first and second axes of the machine tool;
• e. correcting the inclination of the first surface with the support structure, based upon the detected first coordinate values;
• f. detecting second coordinate values related to an inclination of a second surface of the work in a plane crossing a plane of the first surface, relative to the first axis;
• and
• g. rotating the mounting member around an axis parallel to a third axis of the machine tool, with the support structure, based upon the detected second coordinates, so as to correct the inclination of the second surface, the third axis being perpendicular to both the first axis and the second axis;
• at least one of said steps e and g including driving the mounting member in one of two opposite directions relative to the base with one of two driving elements disposed in a frame on opposite sides of a moveable member connected to the mounting member, the moveable member interposed between the two driving members in a space defined by the frame so that the one driving member drives the moveable member relative to the frame so as to drive the mounting member therewith.

A work position adjusting apparatus for adjusting a position of a work having first in second surfaces in crossing planes, based upon mutually perpendicular first, second and third axes of a machine tool, the adjusting with respect to a relative motion between a tool head and a work table, the apparatus comprising:

• a base;
• a mounting member on which the work is mounted;
• support means, interposed between the base and the mounting member, for supporting the mounting member, the supporting means comprising first correcting means for correcting the inclination of the first surface relative to a plane including the first and second axes by driving the mounting member in a direction parallel to the third axis, and second correcting means for correcting the inclination of the second surface relative to the first axis by rotating the mounting member around an axis parallel to the third axis;
• a frame defining a space;
• a moveable member connected between the mounting member and the base, moveable relative to the frame in the space, wherein at least one of the first and second correcting means includes a driving element and an elastic member for driving the mounting member in respective opposite directions, the driving element and the elastic member disposed in the frame on opposite sides of the moveable member so that the moveable member is interposed therebetween, the driving element and the elastic member displacing the frame relative to the moveable member so as to displace the mounting member relative to the base;
• coordinate value detecting means for detecting coordinate values related to an inclination of the first surface relative to a plane including the first and second axes and an inclination of the second surface relative to the first axis;
• and
• controlling means for controlling an operation of each of the correcting means in response to a signal from the coordinate value detecting means.

A work position adjusting apparatus for adjusting a position of a work having first in second surfaces in crossing planes, based upon mutually perpendicular first, second and third axes of a machine tool, the adjusting with respect to a relative motion between a tool head and a work table, the apparatus comprising:

• a base;
• a mounting member on which the work is mounted;
• supporting means, interposed between the base and the mounting member, for supporting the mounting member, the supporting means comprising first correcting means for correcting the inclination of the first surface relative to a plane including the first and second axes by driving the mounting member in a direction parallel to the third axis, and second correcting means for correcting the inclination of the second surface relative to the first axis by rotating the mounting member around an axis parallel to the third axis, at least one of the first and second correcting means including a pair of driving elements for driving the mounting member in opposite directions, the pair of driving elements opposing each other on opposite sides of a portion of the mounting member interposed therebetween, the driving elements including a pair of piezoelectric displacement elements, further comprising means supplying to each of the piezoelectric displacement elements an overdrive voltage having a bias voltage increased or decreased in proportion to the amount of a displacement of each of the pair of piezoelectric displacement elements, wherein the bias voltage is zero when the displacement of the piezoelectric elements is zero, the bias voltage correcting a residual displacement of each piezoelectric displacement element;
• coordinate value detecting means for detecting coordinate values related to an inclination of the first surface relative to a plane including the first and second axes and an inclination of the second surface relative to the first axis;
• and
• controlling means for controlling an operation of each of the correcting means in response to a signal from the coordinate value detecting means.

A work position adjusting apparatus for adjusting a position of a work having first in second surfaces in crossing planes, based upon mutually perpendicular first, second and third axes of a machine tool, the adjusting with respect to a relative motion between a tool head and a work table, the apparatus comprising:

• a base;
• a mounting member on which the work is mounted;
• means supporting the mounting member on the base, the supporting means comprising first correcting means for correcting the inclination of the first surface, and second correcting means for rotating the mounting member around a predetermined axis to correcting the inclination of the second surface;
• a frame defining a space;
• and
• a moveable member connected to the mounting member, moveable relative to the frame in the space, wherein at least one of the first and second correcting means includes a pair of driving elements for driving the mounting member in opposite directions, the pair of driving elements disposed in the frame on opposite sides of the moveable member so that the moveable member is interposed therebetween, the driving elements displacing the frame relative to the moveable member so as to displace the mounting member relative to the base.