# US 5,356,247 A · Curvilinear profile parts machining method

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- Number: US 5,356,247 A
- Document ID: US5356247A
- Status: Granted
- Kind: A
- Application number: 08/088,743
- Filed: 1993-07-08
- Granted: 1994-10-18
- Earliest claimed: 1993-07-08
- Assignees: DCD, Ltd.
- Inventors: Alexandr A. Barsov; Anatoly A. Vdovin; Sergei L. Gavrilov; Valery A. Gorelov; Sergei N. Dolgih; Azkady A. Merkushev; Eugene D. Mokzonosov
- Web page: https://patentgrep.com/patent/US5356247A

## CPC

- B23Q 15/08: Control or regulation of cutting velocity (B23Q15/12 takes precedence)
- G05B 2219/43132: Rotation speed as function of minimum wave energy, toolwear, first learn for different speeds
- G05B 2219/45136: Turning, lathe
- Y10T 82/10: Process of turning
- Y10T 409/303752: Process
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A method for producing machined parts with curvilinear profiles allows for selection of the optimum rotational frequency of a part to be machined by analyzing wave process energy created by interaction of the machining instrument and the machined part while creating the curvilinear profile. During preliminary machining at several rotational frequencies, integral values of the wave process energy are determined and the relationship between these values and the rotational frequencies are identified. The optimum rotational frequency is then selected according to the minimum value of the aforementioned relationship. Increased accuracy in selecting the proper rotational frequency reduces wear of the machining (or cutting) instrument and produces higher quality machined parts in a reduced amount of time.

## Claims

### Claim 1

A curvilinear profile part machining method which comprises:
(a) conducting a plurality of rotations of a spindle during preliminary machining of a part at various preselected rotational frequencies;
(b) determining the integral value of wave process energies for the preselected frequencies;
(c) correlating the integral values of the wave process energies to the rotational frequencies;
(d) selecting the rotational frequency corresponding to the minimum ratio of wave process energy to rotational frequency;
(e) rotating the part at or about the selected rotational frequency.

### Claim 2 (depends on 1)

A method of claim 1, wherein the integral value of the wave process energy is calculated by the following equation: ##EQU6## where: A=wave parameter amplitude;
N=wave parameter intensity;
D=current part diameter;
t=current machining time;
n=rotation frequency.

### Claim 3 (depends on 1)

A method of claim 1, wherein acoustic emission parameters are used as wave parameters.

### Claim 4 (depends on 1)

A method of claim 1, wherein electromagnetic emission parameters are used as wave parameters.