Firewood Processor End Stopper for Log Length Control
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Solution Overview
Problem
Firewood processors face challenges in controlling log length due to manual operation, leading to irregularities and reduced efficiency, and produce unnecessary wood chip waste, especially when cutting logs of varying lengths, which affects air circulation and burning quality in fireplaces.
Innovation Solution
The firewood processor incorporates an adjustable end stopper with an actuator to define log length, minimizes pressure plate movement by adjusting its position based on the end stopper, and optimizes splitting by moving the pressure plate in the opposite direction of wood feed, while a control unit adjusts the splitting wedge position based on log thickness to maximize high-quality firewood production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control is used to move wood to the saw, then the process can be operated, but the productivity is reduced and log length precision deteriorates
Solution Approach 1:
The system uses sensors to detect the position of the log and automatically controls the conveyor and end stopper to achieve precise cutting length without manual intervention. The firewood processor autonomously adjusts its operation based on detected log characteristics.
2Adaptability or versatility
If the pressure plate position is set for the longest possible log, then all log lengths can be processed, but unnecessary empty movements increase and productivity decreases
Solution Approach 1:
The pressure plate position is dynamically adjusted based on the actual log length detected by sensors. Instead of being fixed for the maximum possible length, the system automatically repositions the pressure plate to match each specific log, eliminating unnecessary movements while maintaining versatility.
3Adaptability or versatility
If logs are cut to varying lengths, then flexibility is improved, but manufacturing precision of log length deteriorates
Solution Approach 1:
Sensors detect the actual log position and length, providing feedback to the control system. The end stopper and pressure plate are automatically adjusted based on this feedback to ensure precise and consistent cutting lengths, even when processing logs of different initial sizes.
4Device complexity
If logs are split without optimizing wedge position, then the process is simple, but loss of substance increases due to wood chip waste
Solution Approach 1:
The splitting wedge position is optimized by adjusting parameters such as wedge angle and position based on the detected log characteristics. This optimization reduces wood chip waste by ensuring efficient splitting, while the system maintains relatively simple operation through automated control.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2a~2c
AI summary
A firewood processor (100), comprising a saw (210), a splitting chute (310), a splitting wedge (320) arranged to split the log (910) into pieces (920), a pressure plate (330), and means (340) for moving the pressure (330) plate and/or the splitting wedge (320) towards each other in such a way that the log (910) is configured to be split by said movement. The firewood processor comprises an end stopper (220) arranged at a distance (L0, L0+ΔL) from the saw (210) and configured to support an end (900a) of the wood (900) and to define the length (Lo) of the cut log (910). The pressure plate (330) is configured to push the log (910) towards the splitting wedge (320) in a negative longitudinal direction (-Sx) that is reverse to the positive longitudinal direction (+Sx), and the firewood processor (100) is configured to adjust the position of the pressure plate (330) based on the position of the end stopper (220).