Adjustable Welding Cradle With Flexible Support for Stable Rotation
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Solution Overview
Problem
Conventional robotic welding systems require manual adjustment of workpiece cradles, which is time-consuming and hazardous, and often fail to maintain workpieces in a stable orientation during rotation, leading to instability and movement issues.
Innovation Solution
An adjustable workpiece cradle with a flexible member and a powered adjustment module, including a powertrain and linear drive, allows for automatic adjustment of the concave receptacle size to accommodate varying workpiece diameters, and a grounding module ensures electrical contact as the workpiece rotates, using rollers and biasing elements for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual adjustment of workpiece cradles is used, then device complexity is reduced, but productivity decreases and safety worsens due to time-consuming adjustments and operator hazard
Solution Approach 1:
The workpiece cradle employs an adjustable support structure that can dynamically change its configuration to accommodate different workpiece diameters. The support arms are positioned by a positioning mechanism that allows the cradle to adapt its geometry, transforming a static structure into a dynamic one that can be reconfigured for different welding tasks, thereby improving productivity without permanently increasing device complexity.
Solution Approach 2:
The positioning mechanism is configured to automatically position the support arms at appropriate locations based on workpiece dimensions. This self-positioning capability eliminates the need for manual intervention, allowing the system to adjust itself for different workpiece sizes, thus improving productivity and safety while keeping the control system relatively simple.
2Adaptability or versatility
If conventional fixed-size cradles are used, then device complexity is minimized, but adaptability decreases for varying workpiece diameters
Solution Approach 1:
The cradle structure incorporates movable support arms that can change their position and orientation to accommodate different workpiece diameters. This dynamic configuration allows the same cradle to handle multiple workpiece sizes, significantly improving adaptability without requiring multiple fixed-size cradles.
Solution Approach 2:
The positioning mechanism is designed to serve multiple functions: it positions support arms for different diameters, maintains appropriate clearance distances, and ensures proper workpiece support geometry. This multi-functionality allows a single mechanism to handle various workpiece configurations, enhancing adaptability while controlling overall device complexity.
3Manufacturing precision
If manual positioning of support arms is used, then ease of manufacture is improved, but manufacturing precision decreases for consistent workpiece support
Solution Approach 1:
The positioning mechanism replaces manual mechanical positioning with an automated system that uses sensors and controlled motion to achieve precise support arm positioning. This substitution of manual operation with an automated control system ensures consistent positioning accuracy across different workpieces while maintaining reasonable ease of manufacture through standardized components.
Solution Approach 2:
The system incorporates sensing capabilities that detect workpiece dimensions and provide feedback to the positioning mechanism. This feedback loop allows the support arms to be automatically positioned at the correct locations with high precision, ensuring consistent workpiece support regardless of diameter variations, while the feedback mechanism itself remains relatively simple to implement.
4Reliability
If workpiece rotation during welding is not stabilized, then device complexity is reduced, but reliability worsens due to workpiece instability and movement
Solution Approach 1:
The cradle structure is designed with support arms positioned to provide counterbalancing forces that stabilize the workpiece during rotation. By strategically locating the support points, the system creates a stable rotational axis that minimizes workpiece wobble and movement, improving reliability without requiring complex active stabilization mechanisms.
Solution Approach 2:
The support arms are dynamically positioned to maintain optimal contact with the workpiece surface during rotation. The positioning mechanism adjusts the support arm locations to account for workpiece diameter and ensure stable rotational support, creating a dynamic stabilization system that adapts to different workpiece geometries while maintaining reliability.
Data Source
AI summary
An adjustable workpiece cradle for a welding system includes a support frame, an elongate flexible member coupled to the support frame and extending along a pathway that forms a concave receptacle configured to laterally receive an elongate workpiece for the welding system, and an adjustment module coupled to the flexible member, wherein the adjustment module includes a powertrain configured to selectably adjust the size of the concave receptacle formed by the pathway of the flexible member.