Automated Robotic Welding of Drill Bit Plugs
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Solution Overview
Problem
Conventional welding techniques for attaching plugs to milled-tooth or TCI roller cone drill bits are labor-intensive, skill-dependent, and result in inconsistent weld quality due to reliance on manual welding, which is time-consuming and expensive, and limited by the availability of qualified welders.
Innovation Solution
An automated robotic system using a multi-axis robotic arm to manipulate welding torches, such as arc welding, oxyacetylene welding, or plasma transfer arc torches, for precise and consistent welding of plugs to drill bit legs, incorporating sensors for position determination and program-controlled movement to ensure high-quality welds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual welding techniques are used to attach plugs to drill bit legs, then welding flexibility and adaptability are maintained, but weld consistency and quality are poor due to skill dependency
Solution Approach 1:
The patent replaces manual welding operations with an automated robotic welding system that uses programmable motion control and automated torch manipulation. The robotic arm with welding torch assembly eliminates skill-dependent manual operations while maintaining precise control over welding parameters, directly resolving the contradiction between weld consistency and automation level.
Solution Approach 2:
The system implements automated control of welding parameters including torch speed, arc voltage, wire feed rate, and travel distance through programmable logic. These parameter changes from manual to automated control ensure consistent weld quality by eliminating human variability while maintaining process flexibility through programmable adjustments.
2Productivity
If manual welding is used for attaching plugs to drill bit legs, then equipment complexity is low, but production time and labor costs are high
Solution Approach 1:
The robotic welding system is designed as a multi-functional platform that can weld different components (plugs, roller cones, bearing races) on various drill bit types through programmable operations. This universal system handles multiple welding tasks that would otherwise require separate manual operations, improving productivity while the modular design keeps system complexity manageable.
Solution Approach 2:
The system incorporates automated positioning fixtures and programmable motion control that enable the welding process to proceed without continuous human intervention. The robotic arm autonomously positions the torch, controls welding parameters, and manages the welding sequence, reducing the need for skilled operators while increasing production speed.
3Reliability
If manual welding operations are performed, then equipment cost is low, but skill dependency and labor costs increase
Solution Approach 1:
The robotic welding system incorporates sensors and control systems that monitor welding parameters in real-time and provide feedback to maintain consistent weld quality. This feedback mechanism ensures reliable weld outcomes by automatically adjusting parameters to compensate for variations, reducing skill dependency while the programmable control manages system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The automated system enhances the consistency and quality of welds, reduces reliance on skilled labor, decreases production time, and facilitates data collection for process improvements, leading to cost-efficient and reliable drill bit manufacturing.
Implementation Method 1
a robotic system used to manipulate a welding torch, such as an arc welding torch
Implementation Method 2
plasma transfer arc torches
Data Source
AI summary
A system and method for the welding of drill bits using an automated robot or robots.