Energization cycle counter for induction heating tool

• US 6,815,650 B1
• Filed: 01/02/2004
• Issued: 11/09/2004
• Est. Priority Date: 01/02/2004
• Status: Active Grant

• Current Assignee: Ajax Tocco Magnethermic Corporation (Park-Ohio Holdings Corporation)
• Original Assignee: Kathleen M. Bartz
• Inventors: Bartz, Kathleen M.
• Primary Examiner(s): Leung, Philip H.
• Application Number:
  US10/750,640
• Time in Patent Office: 312 Days
• Field of Search: 219/660-668, 377/15, 377/16
• US Class Current: 219/663
• CPC Class Codes: H05B 6/06 Control, e.g. of temperature, of power

Abstract

An induction heat treating process with a sensor for counting the amount of cycles attributable to an inductor coil. The sensor is preferably a counting mechanism attached to or embedded within the induction coil and is preferably triggered by and responds to the change in voltage generated as the coil is energized. Alternative means of measuring a cycle may be implemented. The output data from the sensor provides useful information for determining the lifespan of an induction coil. Predicting the lifespan of a coil optimizes production by anticipating failure and replacement of a coil during a predetermined down time, limiting on-site inventory, and revolutionizing the billing cycle based on a per cycle cost while decreasing overall production costs and improving inductor coil quality.

Claims

1. A method of monitoring the amount of cycles attributable to an induction heating coil comprising the steps of:

providing an induction heating coil with a counting sensor,

generating a magnetic field about said induction heating coil; and

triggering said counting sensor to increase the count in response to said magnetic field.

2. The method of claim 1, wherein said counting sensor comprises a sensor for receiving and outputting counting data.

3. The method of claim 2, wherein said counting sensor is removably attached to said induction heating coil.

4. The method of claim 2, wherein said counting sensor is embedded within said induction heating coil.

5. The method of claim 2, and further comprising the step of:

said counting sensor consecutively counting each time said sensor is triggered.

6. The method of claim 2, and further comprising the step of:

reading said counting data from said counting sensor.

7. The method of claim 5, and further comprising the step of:

reading said counting data from said counting sensor.

8. The method of claim 1, wherein said counting sensor is an identifier of said induction heating coil, and further comprising the step of:

said identifier triggering an external data source to consecutively count each time said induction heating coil is cycled.

9. The method of claim 8, wherein said counting sensor is removably attached to said induction heating coil.

10. The method of claim 8, wherein said counting sensor is embedded within said induction heating coil.

11. The method of claim 8, and further comprising the step of:

reading said counting data from said external source.

12. A method of monitoring the amount of cycles attributable to an induction coil of an induction coil assembly, said assembly comprising a power supply and an induction coil subassembly including said induction coil and a bus bar connecting said coil to said power supply, the method comprising the steps of:

providing an induction coil subassembly with a counting sensor, wherein said counting sensor comprises a sensor for receiving and outputting counting data;

generating a magnetic field about said coil;

triggering said counter when said magnetic field is generated, wherein said counting sensor consecutively counts a cycle each time said magnetic field is generated about said coil;

maintaining said coil within said induction coil subassembly and continuing to consecutively count said cycles until said coil fails,

reading said output data of said counting sensor, wherein said output data comprises the total amount of consecutive cycles sustained by said coil; and

establishing a baseline lifespan for said coil based on said output data.

13. The method of claim 12, and further comprising the steps of:

providing a series of like induction coil subassemblies each with said counting sensor;

generating a magnetic field about each coil of said induction coil subassemblies;

triggering each of said counting sensors when said magnetic field is generated;

maintaining each of said coils within said induction coil subassemblies and continuing to consecutively count said cycles until each of said coil fails;

reading said output data of each said counting sensors;

wherein said output data comprises the total amount of consecutive cycles sustained by each of said coils; and

establishing an average baseline lifespan for said like coils based on said output data.

14. The method of claim 12, and further comprising the step of:

replacing said coil with a new coil upon said failure.

15. The method of claim 13, and further comprising the steps of:

once said average baseline lifespan is established for said like coils, replacing at least one of said coils with a new like coil upon said failure, wherein said new coil comprises a counting sensor including a sensor for receiving and outputting counting data;

monitoring said consecutive cycles sustained by said replaced coil by reading said output data; and

recommending replacing said replaced coil prior to failure of said coil if said cycles are within a pre-determined range of said average baseline lifespan for said like coils.

16. The method of claim 12, wherein said counting sensor is removably attached to said bus bar.

17. The method of claim 12, wherein said counting sensor is embedded within said induction coil subassembly.

18. The method of claim 15, further comprising the step of:

replacing said replaced coil with a new coil having a counting sensor including a sensor for receiving and outputting counting data.

19. A method of monitoring the amount of cycles attributable to an induction coil of an induction coil assembly comprising a power supply and an induction coil subassembly comprising said induction coil and a bus bar connecting said induction coil to said power supply, wherein an average baseline lifespan for said induction coil has been established, the method comprising the steps of:

providing said induction coil subassembly with a counting sensor, wherein said counting mechanism comprises a sensor for receiving and outputting counting data;

generating a magnetic field about said coil;

triggering said counting sensor when said magnetic field is generated, wherein said counting sensor consecutively counts a cycle each time said magnetic field is generated about said coil;

reading said output data of said counting sensor, wherein said output data comprises the total amount of consecutive cycles sustained by said coil;

monitoring said consecutive cycles sustained by said coil by reading said output data; and

recommending replacing said coil prior to failure of said coil if said cycles are within a pre-determined range of said average baseline lifespan for the like coils.

20. The method of claim 19, wherein said counting sensor is removably attached to said bus bar.

21. The method of claim 19, wherein said counting sensor is embedded within said induction coil subassembly.

22. The method of claim 19, wherein said counting sensor is triggered by a change in voltage across said induction coil subassembly when said power supply is activated.

23. The method of claim 19, wherein said counting sensor is triggered by any one of the following events when said magnetic field is generated about said induction coil:

a temperature differential, a current flow differential, a frequency differential, or a magnetic field differential causing a Hall effect.

24. The method of claim 19, further comprising the step of:

replacing said replaced coil with a new coil having a counting sensor including a sensor for receiving and outputting counting data.