Torch for electric arc welding or plasma cutting system

Patent metadata

Field	Value
Publication number	US-10144080-B2
Application number	US-201514627731-A
Country	US
Kind code	B2
Filing date	Feb 20, 2015
Priority date	Aug 25, 2005
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A cutting system including a plasma arc torch having an electrode, nozzle, and a gas conduit through which gas is transferred to a torch tip. The torch includes at least one of a sensor and a set circuit, where the set circuit stores a parameter related to the torch. The system also includes a power supply outputting a cutting waveform to the electrode via an electrical connector to initiate a working arc. The working arc creates a plasma arc using the gas. The system further includes a controller that controls an output of the power supply and a feeding of the gas through the gas conduit based upon input from a user input device positioned on at least one of the torch and the power supply. The controller monitors at least one usage parameter. The system additionally includes a memory device that is coupled to the controller. The memory device stores data related to the at least one usage parameter.

First claim

What is claimed is:

1. A cutting system comprising:
a plasma arc torch having an electrode, nozzle, and a gas conduit through which gas is transferred to a torch tip, the torch including a sensor and a set circuit, where the set circuit stores a parameter related to the torch;
a power supply outputting a cutting waveform to the electrode via an electrical connector to initiate a working arc, the working arc creating a plasma arc using the gas;
a controller which controls an output of the power supply and a feeding of the gas through the gas conduit based upon input from a user input device positioned on at least one of the torch and the power supply, wherein the controller is configured to monitor usage parameters; and
a memory device, coupled to the controller, to store data related to the usage parameters,
wherein the usage parameters include a cutting amperage, a number of torch pierces, and an operating anomaly event,
wherein the controller utilizes a first wear threshold value for the torch and a second wear threshold value for a component of the torch, wherein the first wear threshold value is different from the second wear threshold value,
wherein the controller uses the data related to the usage parameters to determine information related to an operating life of both of the torch and a component of the torch, and
wherein the controller determines whether the first wear threshold level for the torch and the second wear threshold level for the component of the torch have been exceeded based on the information related to the operating life.

2. The system of claim 1 , wherein the memory device stores data related to the operating anomaly event, and the operating anomaly event relates to one of a force delivered to the torch on an impact, an output voltage of the power supply, an output current of the power supply, and a temperature of the torch.

3. The system of claim 1 , wherein the controller records and updates the data related to the usage parameters during cutting operations.

4. The system of claim 1 , wherein the plasma arc torch further includes a swirl ring, a retaining cap, and a shield cap, and
wherein the controller uses the data related to the usage parameters to determine information related to an operating life of at least one of the electrode, the nozzle, the swirl ring, the retaining cap, and the shield cap.

5. The system of claim 1 , wherein the information related to the operating life includes at least one of information that an end of operating life has been reached, information that an end of operating life will be reached, information relating to an amount of useful operating life that is remaining, wear indication of at least one of the torch or the component of the torch, and information concerning a predicted failure.

6. The system of claim 5 , wherein the controller performs predicative analysis to determine the information related to the operating life based on at least one of a look-up table, a state table, and an algorithm that is stored in the memory device.

7. The system of claim 1 , wherein the memory device is physically located in the controller,
wherein the parameter stored in the set circuit uniquely identifies the torch, and
wherein the stored data in the memory device is updated when the torch is attached to the power supply and the controller identifies the torch based on the parameter stored in the set circuit.

8. The system of claim 1 , wherein the memory device is physically located in the torch and the stored data is updated when the torch is attached to the power supply.

9. The system of claim 1 , wherein the sensor is an accelerometer to measure a force of impact of the torch, and
wherein the controller determines whether the torch impacted an external object based on the measurement.

10. The system of claim 9 , wherein the controller determines whether to inspect or replace the torch or a component of the torch based on a magnitude of the measurement.

11. The system of claim 1 , wherein the sensor is a temperature sensor that measures at least one of a temperature of the torch and a temperature of a component of the torch.

12. The system of claim 11 , wherein the controller uses the measured temperature to calculate data related to an operational life of at least one of the torch and the component of the torch.

13. The system of claim 1 , wherein the controller determines whether a plasma jet anomaly has occurred based on at least one of a cutting voltage and a cutting current.

14. The system of claim 13 , wherein the controller determines whether to inspect or replace the torch or a component of the torch based on the plasma jet anomaly.

15. The system of claim 14 , wherein the plasma jet anomaly is at least one of a burn back and a plasma jet short.

16. The system of claim 1 , wherein the set circuit includes information that allows the controller to identify at least one of a torch type, an electrode type, a nozzle type, and a shield type.

17. The system of claim 1 , wherein the data related to the usage parameters is reset to a value indicating a new condition if the torch has been replaced or refurbished.

18. The system of claim 1 , further comprising a user display, wherein the user display provides a status of the torch, the status including at least one of an indication that the torch is ready to use, an indication that the torch or the component of the torch is nearing an end of useful life, and an indication that the torch or the component of the torch needs to be replaced.

19. A cutting method comprising:
creating a working arc using a plasma arc torch having an electrode, nozzle, and a gas conduit through which gas is transferred to a torch tip, the torch including a sensor and a set circuit, where the set circuit stores a parameter related to the torch;
providing a cutting waveform from a power source to the electrode via an electrical connector to initiate the working arc using the gas;
inputting user preferences on at least one of the torch and the power supply;
controlling the cutting waveform and a feeding of the gas through the gas conduit based upon the user preferences;
monitoring usage parameters; and
storing data related to the usage parameters on a memory device,
wherein the usage parameters include a cutting amperage, a number of torch pierces, and an operating anomaly event
using the data related to the usage parameters to determine information related to an operating life of both of the torch and a component of the torch,
determining whether a first wear threshold value for the torch has been exceeded based on the information related to the operating life;
determining whether a second wear threshold value for the component of the torch has been exceeded based on the information related to the operating life, wherein the first wear threshold value for the torch is different from the second wear threshold value for the component of the torch.

20. The method of claim 19 , further comprising recording and updating the data related to the usage parameters during cutting operations.

21. The method of claim 19 , wherein the information related to the operating life includes at least one of information that an end of operating life has been reached, information that an end of operating life will be reached, information relating to an amount of useful operating life that is remaining, wear indication of at least one of the torch or the component of the torch, and information concerning a predicted failure.

Assignees

• Lincoln Global Inc

Inventors

• Chantry Bruce
• Kachline Jeffrey L

Classifications

• B23K9/173

  and of a consumable electrode · CPC title

• B23K9/28

  Supporting devices for electrodes · CPC title

• B23K9/0953

  using computing means · CPC title

• B23K9/291

  the shielding means being a gas · CPC title

• B23K9/1056

  by using digital means (B23K9/1068 takes precedence) · CPC title