Swirl ring and contact element for a plasma arc torch cartridge

• US 10,335,888 B2
• Filed: 02/09/2018
• Issued: 07/02/2019
• Est. Priority Date: 02/12/2016
• Status: Active Grant

• Current Assignee: Hypertherm Incorporated
• Original Assignee: Hypertherm Incorporated
• Inventors: Zhang, Yu, Roberts, Jesse A., Duan, Zheng, Scheller, Michael, Agan, David, Moody, Steven, Eickhoff, Stephen T., Quillia, Garrett K.
• Primary Examiner(s): Paschall, Mark H
• Application Number:
  US15/892,678
• Publication Number:
  US 20180257164A1
• Time in Patent Office: 508 Days
• Field of Search: 21912144, 21912139, 21912148, 2191215, 21912151, 21912152, 219 75
• CPC Class Codes: B23K 10/00 Welding or cutting by means of a plasma
• CPC Class Codes: B23K 10/003 Scarfing, desurfacing or deburring by applying flames B23K7/06
• CPC Class Codes: H05H 1/34 Details, e.g. electrodes, nozzles
• CPC Class Codes: H05H 1/3421 Transferred arc or pilot arc mode
• CPC Class Codes: H05H 1/3468 Vortex generators
• CPC Class Codes: H05H 1/3473 Safety means
• CPC Class Codes: H05H 1/3489 Means for contact starting
• CPC Class Codes: H05H 1/38 Guiding or centering of electrodes

Abstract

A swirl ring for a plasma arc torch includes a body configured to at least partially surround and slidingly engage an electrode of the plasma arc torch. The body includes a first end and a second end opposite the first end, the first and second ends defining a longitudinal axis, and at least one protuberance extending from the second end in a direction of the longitudinal axis. The at least one protuberance is configured to engage a switch of the plasma arc torch for sensing a presence of a swirl ring in the plasma arc torch.

Claims

1. A cartridge frame for mating with a plasma arc torch having a cartridge sensing switch and one or more consumables seated in the frame of the plasma arc torch during operation, the cartridge frame comprising:

a body configured to at least partially surround and slidingly engage an electrode of the plasma arc torch, the body including a first end and a second end nearest the torch and opposite the first end, the first and second ends defining a longitudinal axis, and at least one discrete protuberance extending from the second end of the body in a direction of the longitudinal axis,

wherein the at least one protuberance is configured to mechanically engage the cartridge sensing switch of the plasma arc torch during operation of the plasma arc torch.

2. The swirl ring of claim 1 further including a set of molded swirl holes integrally formed within the body of the cartridge frame.

3. The cartridge frame of claim 1 further including a crimped on, unitary nozzle.

4. The cartridge frame of claim 1 further including an electrically conductive contact element confined within the at least one protuberance, wherein the at least one protuberance includes a set of guide tracks configured to engage a set of guide channels on a contact element that is complementary to the set of guide tracks.

5. The cartridge frame of claim 4 wherein the at least one protuberance includes at least one retaining feature to confine a contact element.

6. The cartridge frame of claim 1 wherein the at least one protuberance includes a guide track for interfacing with a contact element.

7. The cartridge frame of claim 1 wherein the at least one protuberance includes one or more axial stops.

8. The cartridge frame of claim 1 further including an electrode disposed within the swirl ring, the electrode including a spring configured to bias a contact element toward a cathode of the plasma arc torch.

9. The cartridge frame of claim 1 wherein the at least one protuberance is shaped to matingly engage a contact element and to define a translation path of the contact element within the cartridge frame.

10. The frame cartridge of claim 1 wherein the one or more protuberances has a linear height of between approximately 5 and 7 millimeters.

11. The frame cartridge of claim 1 wherein the one or more protuberances has a linear width of between approximately 1 and 3 millimeters.

13. The consumable cartridge of claim 10 wherein the means for engaging the consumable sense feature of the plasma arc torch during operation of the plasma arc torch includes one or more protuberances.

14. The consumable cartridge of claim 13 wherein the one or more protuberances includes a guide track for interfacing with a contact element configured to be held within the consumable cartridge.

15. The consumable cartridge of claim 13 wherein the one or more protuberances includes an axial stop.

16. The consumable cartridge of claim 13 further including an electrode disposed within the consumable cartridge, the electrode interacting with a spring configured to bias a contact element toward a cathode of the plasma arc torch.

17. The consumable cartridge of claim 13 wherein the one or more protuberances is shaped to matingly engage a contact element and to define a translation path of the contact element within the consumable cartridge.

18. The consumable cartridge of claim 13 wherein the one or more protuberances has a linear height of between approximately 5 and 7 millimeters.

19. The consumable cartridge of claim 13 wherein the one or more protuberances has a linear width of between approximately 1 and 3 millimeters.

12. A consumable cartridge for mechanically engaging with a consumable sense feature of a plasma arc torch having one or more consumables seated in the frame of the plasma arc torch during operation, the consumable cartridge including a cartridge frame comprising:

means for engaging the consumable sense feature of the plasma arc torch during operation of the plasma arc torch, the means extending in a direction of a longitudinal axis of the consumable cartridge.

20. A consumable cartridge for mechanically engaging with a consumable sense feature of a plasma arc torch having one or more consumables seated in the frame of the plasma arc torch during operation, the consumable cartridge comprising:

a body configured to at least partially surround and slidingly engage an electrode of the plasma arc torch, the body including a distal first end and a proximal second end opposite the first end, the first and second ends defining a longitudinal axis; and

an intermediate component configured to be positioned between the body and a safety switch of the plasma arc torch, the intermediate component including at least one discrete protuberance affixed to a proximal end of the intermediate component, the discrete protuberance extending from the proximal end of the intermediate component in a direction of the longitudinal axis,

wherein the at least one discrete protuberance is configured to enable an operation of the plasma arc torch by the plasma arc torch sensing a presence of a consumable of the plasma arc torch by the safety switch.

21. The consumable cartridge of claim 20 wherein the one or more protuberances has a linear height of between approximately 5 and 7 millimeters.

22. The consumable cartridge of claim 20 wherein the one or more protuberances has a linear width of between approximately 1 and 3 millimeters.

23. A method of enabling an operation of a plasma arc torch having a safety switch and one or more consumables seated in the frame of the plasma arc torch during operation, the method comprising:

providing a plasma arc torch cartridge having a protuberance on a body of the plasma arc torch cartridge, the protuberance extending from the plasma arc torch cartridge; and

installing the plasma arc torch cartridge in a plasma arc torch, the protuberance mechanically activating a safety switch for sensing a presence of the torch cartridge of the plasma arc torch during operation of the plasma arc torch.