Roundness measuring apparatus

Patent metadata

Field	Value
Publication number	US-10323921-B2
Application number	US-201715664273-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Aug 31, 2016
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A roundness measuring device including: an angle detector detecting a current rotation angle of a table relative to an X axis direction; a joystick (external operator) issuing an instruction for an operation amount of a rotation axis line of the table; a centering controller calculating a CX axis displacement amount and a CY axis displacement amount from the operation amount and the rotation angle, and displacing a CX axis displacement mechanism and CY axis displacement mechanism based on the calculated CX axis displacement amount and CY axis displacement amount; and a centering controller calculating an LX axis tilt amount and an LY axis tilt amount from the operation amount and the rotation angle, and displacing an LX axis tilt mechanism and LY axis tilt mechanism based on the calculated LX axis tilt amount and LY axis tilt amount.

First claim

What is claimed is:

1. A roundness measuring device comprising:
a table provided with a placement plate on which a work piece is to be placed, the table configured to rotate around a rotation axis line and cause the work piece placed on the placement plate to rotate;
a detector provided with a stylus brought into contact with the work piece placed on the placement plate, the detector configured to detect a change in position of the stylus, wherein:
the stylus is brought into contact with a peripheral surface of the work piece when the table is rotated, and
a measurement is made of a circular shape of the work piece from the change in position of the stylus detected by the detector;

a first displacer and a second displacer installed on the table, the first displacer and second displacer configured to respectively displace the placement plate in a first displacement axis direction and a second displacement axis direction orthogonal to the rotation axis line;
an angle detector configured to detect a current rotation angle of the table;
an external operator configured to issue an instruction for an operation amount of the work piece placed on the placement plate, the operation amount occurring in an operation direction orthogonal to the rotation axis line; and
a centering controller configured to calculate a first displacement amount in the first displacement axis direction and a second displacement amount in the second displacement axis direction from the operation amount and the rotation angle, the centering controller further configured to drive the first and second displacers based on the respective calculated first and second displacement amounts.

2. The roundness measuring device according to claim 1 , wherein a first tilter and a second tilter are further installed on the table, the first and second tilters respectively adjusting a tilt of the placement plate relative to a first tilt axis direction and a second tilt axis direction orthogonal to the rotation axis line, and
a leveling controller is further provided calculating a first tilt amount relative to the first tilt axis direction and a second tilt amount relative to the second tilt axis direction from the operation amount and the rotation angle θ, and driving the first and second tilters based on the respective calculated first and second tilt amounts.

3. A roundness measuring device comprising:
a table provided with a placement plate on which a work piece is to be placed, the table configured to rotate around a rotation axis line and cause the work piece placed on the placement plate to rotate; and
a detector provided with a stylus brought into contact with the work piece placed on the placement plate, the detector configured to detect a change in position of the stylus, wherein:
the stylus is brought into contact with a peripheral surface of the work piece when the table is rotated, and
a measurement is made of a circular shape of the work piece from the change in position of the stylus detected by the detector;

a first tilter and a second tilter installed on the table, the first tilter and second tilter configured to respectively adjust a tilt of the placement plate relative to the first tilt axis direction and the second tilt axis direction;
an angle detector configured to detect a current rotation angle of the table;
an external operator configured to issue an instruction for an operation amount of the work piece placed on the placement plate, the operation amount occurring in an operation direction orthogonal to the rotation axis line; and
a leveling controller configured to calculate a first tilt amount relative to the first tilt axis direction and a second tilt amount relative to the second tilt axis direction from the operation amount and the rotation angle, and further configured to drive the first and second tilters based on the respective calculated first and second tilt amounts.

4. The roundness measuring device according to claim 1 , wherein the first and second displacement amounts are values in which a distance corresponding to the instructed operation amount in the operation direction is distributed into components in the first and second displacement axis directions in accordance with the rotation angle, such that a displacement amount combining the first and second displacement amounts is equal to a distance corresponding to the operation amount in the operation direction.

5. The roundness measuring device according to claim 2 , wherein the first and second displacement amounts are values in which a distance corresponding to the instructed operation amount in the operation direction is distributed into components in the first and second displacement axis directions in accordance with the rotation angle, such that a displacement amount combining the first and second displacement amounts is equal to a distance corresponding to the operation amount in the operation direction.

6. The roundness measuring device according to claim 2 , wherein:
the first and second tilt amounts are displacement amounts in the operation direction at a rotation axis line direction position of the stylus, and
the first and second tilt amounts are values distributed into components in the first and second tilt axis directions in accordance with the rotation angle, such that a tilt amount combining the first and second tilt amounts is equal to a distance corresponding to the instructed operation amount in the operation direction at a position of the stylus in the rotation axis line direction.

7. The roundness measuring device according to claim 3 , wherein:
the first and second tilt amounts are displacement amounts in the operation direction at a rotation axis line direction position of the stylus, and
the first and second tilt amounts are values distributed into components in the first and second tilt axis directions in accordance with the rotation angle, such that a tilt amount combining the first and second tilt amounts is equal to a distance corresponding to the instructed operation amount in the operation direction at a position of the stylus in the rotation axis line direction.

Assignees

• Mitutoyo Corp

Inventors

• Nakayama Tatsuki
• Ishibashi Kazushige

Classifications

• G01B5/201 Primary

  for measuring roundness · CPC title

• G01B21/20 Primary

  for measuring contours or curvatures, e.g. determining profile · CPC title