Closed-loop CNC machine system and method

• US 8,136,432 B2
• Filed: 03/18/2011
• Issued: 03/20/2012
• Est. Priority Date: 06/10/2005
• Status: Active Grant

• Current Assignee: Olati, LLC
• Original Assignee: Prototype Productions Incorporated (Prototype Productions)
• Inventors: Travez, Joe V., Binette, John, Travez, Jose M., Feldman, Ben, McLaughlin, Don, Travez, Italo D.
• Primary Examiner(s): FRIDIE JR, WILLMON
• Application Number:
  US13/051,362
• Publication Number:
  US 20110264257A1
• Time in Patent Office: 368 Days
• Field of Search: 82/11.1, 821/17, 821/18, 483/11, 451/9, 700/159, 700/160, 702/179
• US Class Current: 82/117
• CPC Class Codes: B23Q 15/12 Adaptive control, i.e. adjusting itself to have a performance which is optimum according to a preassigned criterion
• CPC Class Codes: B23Q 17/0971 by measuring mechanical vibrations of parts of the machine arrangements for measuring vibrations B23Q17/12
• CPC Class Codes: G05B 2219/33099 Computer numerical control [CNC]; Software control [SWC]
• CPC Class Codes: G05B 2219/37084 Display tool parameters
• CPC Class Codes: G05B 2219/37533 Real time processing of data acquisition, monitoring
• CPC Class Codes: G05B 2219/42038 Real time adaptive control
• CPC Class Codes: Y10T 82/10 Process of turning
• CPC Class Codes: Y10T 82/25 Lathe
• CPC Class Codes: Y10T 82/2502 with program control

Abstract

A closed-loop feedback system and method for performing a machining operation. A tool'"'"'s operational properties are measured in real-time. The operating parameters of the machining process are adjusted in real-time based on the measured properties.

Claims

1. A closed-loop feedback control machining system, the system comprising:

a machine comprising;

a workpiece holder;

a tool holder;

a spindle drive system for providing relative rotation between a workpiece and a tool; and

a feed drive system for providing relative translational movement between a workpiece and a tool;

a tool;

at least one sensor operatively associated with the tool;

at least one signal converter operatively associated with the at least one sensor;

at least one signal analyzer operatively associated with the at least one signal converter; and

at least one controller operatively associated with the at least one signal analyzer and operatively associated with the spindle drive system and the feed drive system, wherein the at least one sensor receives a signal from the tool and transmits the signal to the at least one signal converter, wherein the at least one signal converter converts the received signal to a set of digital parameters and transmits the digital parameters to the at least one signal analyzer, wherein the at least one signal analyzer determines in real-time at least one of the elements selected from the group consisting of;

the force on the tool, the deflection of the tool, and the vibration of the tool, and wherein the at least one controller adjusts the power exerted by at least one of the spindle drive system and the feed drive system in real-time based on the real-time determinations.

2. The closed-loop feedback control machining system of claim 1, wherein the machine is a lathe.

3. The closed-loop feedback control machining system of claim 1, wherein the tool is a boring bar.

4. The closed-loop feedback control machining system of claim 1, wherein the at least one sensor is selected from the group consisting of:

fiber optic sensors, magnetic sensors, and analog electronic strain gauges.

5. The closed-loop feedback control machining system of claim 2, wherein the signal received from the tool is an optical signal.

6. The closed-loop feedback control machining system of claim 1, wherein the at least one controller is a CNC controller.

7. The closed-loop feedback control machining system of claim 1, further comprising a portable display device operatively associated with the at least one controller such that the portable display device can inform a user of the adjustments made by the controller.

8. The closed-loop feedback control machining system of claim 7, wherein the portable display device is selected from the group consisting of a cellular phone, a PDA, and a tablet PC.