Thread Forming Power Tool With Clamping and Kickback Feedback
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Solution Overview
Problem
Existing pipe threading and cutting devices lack ergonomic balance and secure clamping mechanisms, leading to reduced user control and enhanced operational safety, and fail to effectively manage kickback during the threading or cutting process.
Innovation Solution
A powered thread forming system with a clamping device, reaction arm, and biasing mechanism that secures the workpiece, inhibits tool rotation, and applies axial force to the cutting head, combined with a motor control system that senses and responds to rotational motion to prevent kickback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handheld pipe threading device is used, then portability and ease of operation are improved, but user control and operational safety deteriorate due to lack of ergonomic balance and secure clamping
Solution Approach 1:
The patent introduces a separate support device with clamping mechanism as an intermediary between the handheld threading device and the workpiece. This support device provides stable positioning and secure clamping, while the handheld device maintains its portability and ease of operation. The reaction arm acts as a mediator to transfer and stabilize forces during threading operations.
Solution Approach 2:
The system is divided into two independent components: a handheld threading device for portability and ease of operation, and a separate support device with clamping mechanism for stability and safety. This segmentation allows each component to optimize its specific function without compromising the other.
2Manufacturing precision
If a secure clamping mechanism is added to improve workpiece positioning accuracy, then manufacturing precision and operational safety are improved, but device complexity increases
Solution Approach 1:
The reaction arm functions as a counterbalancing element that opposes and stabilizes the forces generated during threading. By providing a reaction force through the abutment surface, it counteracts the tendency of the handheld device to rotate or move, thereby maintaining positioning accuracy without requiring complex active control systems.
3Stability of the object's composition
If a reaction arm is added to inhibit tool rotation, then stability and threading accuracy are improved, but device complexity increases
Solution Approach 1:
The reaction arm provides self-stabilizing functionality by automatically opposing rotational forces through its abutment surface. The mechanism uses passive mechanical feedback where the reaction force naturally counteracts tool rotation without requiring active control systems, sensors, or complex actuation mechanisms.
4Reliability
If motor control with kickback detection is implemented, then operational safety is improved, but device complexity and cost increase
Solution Approach 1:
The control system implements feedback by detecting rotational motion (kickback) and responding by ceasing motor operation. This closed-loop control enhances safety by automatically responding to hazardous conditions without requiring complex predictive algorithms or multiple sensors.
Data Source
AI summary
A power tool for forming threads includes a tool housing with a motor housing portion having a first handle, a battery receptacle configured to receive a battery, a motor housing portion with a motor, a transmission housing portion with a transmission, and an operating head portion arranged along a tool axis. A cutting head is at least partially received in the operating head portion and rotates about a rotational axis transverse to the tool axis to form threads in a workpiece. A second handle is coupled to the operating head or the tool housing adjacent the operating head. When power is applied to the motor, the motor rotates and the transmission transmits torque from the motor to rotate the cutting head. A center of gravity of the power tool is positioned at a portion of the tool housing substantially aligned with the second handle.