Gripper Arm Lumber Positioning for Sawing Accuracy
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Solution Overview
Problem
Current methods for positioning lumber prior to sawing are not sufficiently accurate and reliable, leading to suboptimal cutting orientations and reduced lumber yield.
Innovation Solution
A lumber handling apparatus with gripper arm support platforms, skewing assemblies, and hold-down mechanisms that allow for precise positioning and orientation of lumber using gripper arms and image-based calculations to ensure optimal cutting alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional conveyance systems with side rollers are used to position lumber, then the system structure is simple, but the positioning accuracy and reliability are insufficient
Solution Approach 1:
The patent replaces the conventional mechanical side-roller positioning system with an active gripper arm system that uses controlled mechanical engagement to achieve precise positioning. The gripper arms provide direct physical contact and control over the lumber, enabling accurate orientation without relying on passive roller mechanisms that lack precision.
Solution Approach 2:
The gripper arms are equipped with sensors and control systems that enable them to automatically detect lumber characteristics, calculate optimal cutting orientations, and self-adjust their positioning without external intervention. This self-service capability achieves high positioning accuracy while reducing the need for complex external positioning mechanisms.
2Measurement precision
If optical or mechanical measuring systems are used to sense wanes and calculate optimal orientation, then measurement capability is improved, but the system complexity and cost increase
Solution Approach 1:
The gripper arms serve multiple functions: they grip the lumber for transport, measures its dimensions through integrated sensors, calculate optimal cutting orientations using onboard processors, and physically position the lumber accordingly. This multi-functionality eliminates the need for separate dedicated measurement and positioning systems, reducing overall complexity while maintaining high measurement precision.
Solution Approach 2:
The patent merges the measurement, calculation, and positioning functions into a single integrated gripper arm system. The sensors, processors, and actuation mechanisms are combined in one unit that directly interacts with the lumber, eliminating the need for separate optical measuring systems and complex control architectures.
3Adaptability or versatility
If side rollers are independently adjustable to impart specific orientations, then positioning flexibility is improved, but the reliability and consistency of positioning deteriorate
Solution Approach 1:
The gripper arms incorporate sensors that continuously monitor the lumber's position, orientation, and dimensions. This feedback is processed in real-time to calculate the optimal cutting orientation, and the gripper arms automatically adjust their grip and positioning accordingly. This closed-loop feedback system ensures both flexibility in adapting to different lumber characteristics and reliability in achieving consistent accurate positioning.
Solution Approach 2:
The gripper arms provide dynamic, active control of lumber positioning rather than static mechanical adjustment. The system can continuously adapt its grip force, position, and orientation based on real-time measurements and calculated optimal cutting angles, ensuring reliable and consistent positioning across varying lumber types and conditions.
Data Source
AI summary
A method of positioning lumber in a given orientation in a handling apparatus having a base frame, a longitudinal transport assembly, and at least two gripper arm support platforms with a pair of gripper arms positioned on each of the support platforms. A work piece is gripped with the gripper arms without the work piece engaging the longitudinal transport assembly. The gripper arms are adjusted on at least one of the support platforms in a direction generally perpendicular to the longitudinal transport assembly in order to selectively position the work piece. The work piece is then brought into engagement with the transport assembly and the gripper arms are released from the work piece.