Computer-controlled modular power supply for precision welding

• US 5,837,968 A
• Filed: 07/15/1996
• Issued: 11/17/1998
• Est. Priority Date: 07/15/1996
• Status: Expired due to Fees

• Current Assignee: Creative Pathways Incorporated
• Original Assignee: Creative Pathways Incorporated
• Inventors: Yung, Eugene S., Nourrcier, Charles E., Rohrberg, Timothy K., Rohrberg, Roderick G.
• Primary Examiner(s): Shaw, Clifford C.
• Application Number:
  US08/680,764
• Time in Patent Office: 855 Days
• Field of Search: 219/130.1, 219/130.21, 219/130.31, 219/130.33, 219/130.32, 219/130.5, 219/130.51, 219/132, 219/137 PS
• US Class Current: 219/130.1
• CPC Class Codes: B23K 9/1062 with computing means
• CPC Class Codes: B23K 9/1075 Parallel power supply, i.e. multiple power supplies or multiple inverters supplying a single arc or welding current

Abstract

A Computer Controlled Modular Power Supply for Precision Welding (10) that overcomes the problems encountered by previous power supplies is disclosed. A preferred embodiment of the invention includes an enclosure (100) which holds a Computer Control Module (400), a Welding Power Module (500) and an Electrical Power Module (600). These modules are removable, interchangeable and may be used in any combination. The Computer Control Module (400) includes a microprocessor (406) which is programmed using a color LCD display with a touch screen (300) mounted on one side of the enclosure. In a preferred embodiment of the invention, an 80486 chip is used to run a Microsoft™ Windows™ Operating System and proprietary, user-friendly software developed by Creative Pathways, Inc. of Torrance, Calif. that controls welding operations. The Welding Power Module (500) includes four removable drawers (502) which each contain an individual power unit. The Power Supply is lightweight, portable, and dissipates heat without vents or fans.

Claims

1. An apparatus for providing electrical power comprising:

an enclosure (100);

said enclosure (100) having an interior (106);

said interior (106) being partitioned into a plurality of bays (110);

a Computer Control Module (400) which is inserted into one of said plurality of bays (110);

said Computer Control Module (400) including a programmable micro-processor (406) and a non-volatile memory (408);

a Welding Power Module (500) which is inserted into one of said plurality of bays (110);

said Welding Power Module (500) including a plurality of drawers (504) containing individual power units;

each of said drawers (502) having a plurality of heat-dissipating fins (504) for cooling said drawers (502) without vents or fans to keep said interior (106) free from outside contamination;

an Electrical Power Module (600) which is inserted into one of said plurality of bays (110); and

a display (300) mounted on said enclosure (100) for monitoring the operation of said Computer Control Module (400) and said Welding Power Module (500).

2. An apparatus as recited in claim 1, in which:

each of said modules (400, 500,

     600) may each separately be removed from said enclosure 100.

3. An apparatus as recited in claim 1, in which:

each of said drawers (502) may each separately be removed from said Welding Power Module (500).

4. An apparatus as recited in claim 1, in which:

each of said modules (400, 500,

     600) may each be interchanged to provide a variety of said modules (400, 500,

     600) within said enclosure (100).

5. An apparatus as recited in claim 1, in which:

said display (300), which is located in said front panel (200) of said enclosure (100), is a liquid crystal display with a touch screen (300) that allows the operator of the Power Supply to monitor its functions.

6. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) is loaded with an operating system that includes a graphical user interface.

7. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) includes an embedded real-time processor (410) which controls said Welding Power Module (500).

8. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) includes a watch dog timer (412) to maintain safe welding operations by turning off said Power Module (500) if a software routine running in said Computer Control Module is not executed.

9. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) generates a graphical user interface on said display (300) that allows the operator of the Power Supply to monitor its functions.

10. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) stores calibration points in said non-volatile memory after said calibration points are entered on said display (300);

said calibration points being used to compare stored data concerning welding cycles to actual measurements to verify the quality of welding operations.

11. An apparatus as recited in claim 1, in which:

said Welding Power Module (500) operates more than one welding arc simultaneously by drawing separately controllable electrical currents from said drawers (502).

12. An apparatus as recited in claim 1, in which:

said Welding Power Module (500) is used for multi-axes welding by using separately controllable electrical currents from said drawers (502).

13. An apparatus as recited in claim 1, in which:

said Electrical Power (600) includes a low emission Arc Starter Circuit (450) which discharges a large spike of current to initiate an arc.

14. An apparatus as recited in claim 13, in which:

said Arc Starter Circuit (450) includes a voltage double and rectifier (452) and a Hyman Trigger transformer (454);

said voltage double and rectifier (452) and a Hyman Trigger transformer (454) being coupled together to generate a high voltage in excess of 4,000 volts.

15. An apparatus as recited in claim 1, in which:

said Welding Power Module (500) is connected to an induction heater and is used for induction heating tasks.

16. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) is connected to a CNC system and is used to control CNC operations.

17. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) is connected to an X-Y table and is used to control an X-Y table.

18. An apparatus as recited in claim 1, in which:

said Computer Control Module (400) is connected to an induction heater and is used to control induction heating.