Systems and devices for performing powered threading operations
AssigneeEmerson Electric Co.
InventorsRichard M. Kundracik, Paul W. Gress, James E. Hamm, Glen R. Chartier
Life of this patent
Estimating the term…
Abstract
A device and associated system for threading, cutting, and reaming pipe ends are described. The device and system utilizes a brushless DC electric motor. The devices also include on-board electronics and operator interface(s) to provide sophisticated control and information as to the various operations. Also described are methods of operating the devices and several different modes for performing various operations.
Claims20
A powered threader device comprising:
- a frame assembly;
- a selectively releasable chuck assembly adapted for retaining and rotating a workpiece about a workpiece central axis;
- a selectively positionable die assembly for forming threads in the workpiece;
- and
- a brushless DC electric motor supported by the frame assembly, the motor providing a powered rotary output in selectable engagement with the chuck assembly to thereby selectively rotate the workpiece.
A powered threader device comprising:
- a frame assembly;
- a brushless DC electric motor supported on the frame assembly, the motor providing a powered rotary output;
- a selectively releasable chuck assembly supported on the frame assembly adapted for retaining and rotating a workpiece about a workpiece central axis;
- a drive train for transmitting rotary motion from the rotary output of the brushless electric motor to the chuck assembly;
- a selectively positionable die assembly supported on the frame assembly for forming threads in the workpiece;
- and
- control provisions for controlling rotation of the workpiece and position of the die assembly while forming threads in the workpiece.
A method of forming a thread in a workpiece, the method comprising:
- releasably securing a workpiece in a chuck assembly adapted for retaining and rotating the workpiece about a workpiece central axis;
- contacting a selectively positionable thread forming die with the workpiece;
- and
- rotating the workpiece by use of a brushless DC electric motor, whereby upon rotation of the workpiece about the workpiece central axis, the thread forming die is contacted with the workpiece to thereby form a thread in the workpiece.
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A method for performing a threading operation on a workpiece using a powered threader device, the method comprising:
- securing the workpiece in the threader device;
- obtaining parameters for the desired threading operation;
- determining the target thread length;
- confirming existence of appropriate conditions thereby enabling the threading operation;
- rotating the workpiece while secured in the threader device;
- contacting and engaging a threading die or tool with the workpiece;
- linearly displacing the threading die or tool alongside the workpiece to thereby form a helical thread;
- monitoring the distance of linear displacement of the threading die or tool;
- comparing the distance of linear displacement of the threading die or tool to the target thread length;
- concluding the threading operation upon the distance of linear displacement of the threading die or tool being equal to or greater than the target thread length.
A method for performing a threading operation on a workpiece using a powered threader device including a brushless DC electric motor, the method comprising:
- securing the workpiece in the threader device;
- obtaining parameters for the desired threading operation;
- determining the target thread revolutions;
- confirming existence of appropriate conditions thereby enabling the threading operation;
- rotating the workpiece while secured in the threader device by activating the brushless DC electric motor;
- contacting and engaging a threading die or tool with the workpiece;
- linearly displacing the threading die or tool alongside the workpiece to thereby form a helical thread;
- monitoring the angular displacement of the brushless DC electric motor;
- comparing the angular displacement of the brushless DC electric motor to the target thread revolutions;
- concluding the threading operation upon the angular displacement of the brushless DC electric motor being equal to or greater than, the target thread revolutions.
Dependencies are inferred from the claim text.