Apparatus for detecting and indicating the balance of a rotary body in a machine tool

Patent 4817003 Issued on March 28, 1989. Estimated Expiration Date:

December 22, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3811327

3911751

Numerically controlled machine tool
Patent #: 4027245
Issued on: 05/31/1977
Inventor: Bourrat , et al.

Read-out system for wheel balancer
Patent #: 4155255
Issued on: 05/22/1979
Inventor: Sherman , et al.

Vector display scope
Patent #: 4249171
Issued on: 02/03/1981
Inventor: Batcher

Digital electronic balancing apparatus
Patent #: 4357832
Issued on: 11/09/1982
Inventor: Blackburn , et al.

System of analysis by visual display of the vibratory movements of a rotary machine
Patent #: 4423635
Issued on: 01/03/1984
Inventor: Senicourt , et al.

Dynamic vehicle tire and wheel balancing system
Patent #: 4489607
Issued on: 12/25/1984
Inventor: Park

Free spinning electronic wheel balancer
Patent #: 4502328
Issued on: 03/05/1985
Inventor: Wood , et al.

Imbalance measuring system and method Patent #: 4608650
Issued on: 08/26/1986
Inventor: Kapadia

Inventors

Assignee

Nagase Iron Works Co., Ltd.

Application

No. 07/136516 filed on 12/22/1987

US Classes:

701/124, Determining balance or center of gravity (e.g., load distribution of vehicle)700/164, Grinding700/279, Balancing or alignment702/101, Weight702/56, Vibration detection702/94, Position measurement73/462, With electrical sensor and indicator73/465Oscilloscope (cathode ray)

Examiners

Primary: Lastova, John R.

Attorney, Agent or Firm

Jordan and Hamburg

International Classes

B24B 41/00 (20060101)
B24B 41/04 (20060101)
G01M 1/00 (20060101)
G01M 1/08 (20060101)
G01M 1/22 (20060101)

Foreign Application Priority Data

1984-10-09 JP

Abstract

The present invention relates to an apparatus for detecting and indicating the balance of a rotating body such as a grinding wheel, a spindle or the like in a machine tool such as a grinding machine. The apparatus comprises an original-point detecting means for detecting an original point on the rotating body, a vibration detecting means for detecting vibration caused by an unbalanced condition of the rotating body, an arithmetic means for computing, from the detected vibration, a deviation of said rotating body in each of a plurality of index positions on the rotating body which are angularly spaced from said original point as a reference, a deviation display means for displaying the maximum value of the deviations, and an unbalanced position indicating means for indicating one of the index positions based on the computed deviations.