Timber Sawing Support Rollers With Dynamic Width Adjustment
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Solution Overview
Problem
Existing timber body dividing machines face issues with timber pieces tilting and transverse movement at the end of the operation, leading to dimensional deviations and increased risk of saw band breakage due to lateral forces.
Innovation Solution
The pair of second support rollers are configured to adjust their mutual distance during the timber body dividing operation, starting from the real width of the timber body at the beginning to the real width minus the total thickness of the first saw band at the end, ensuring precise guidance and preventing tilting and transverse movement of the timber pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed support rollers are used throughout the timber body dividing operation, then the structure is simple and easy to operate, but the timber pieces tilt and move transversally at the end of the operation causing dimensional deviations
Solution Approach 1:
The support roller system is made dynamic by allowing the mutual distance between the pair of second support rollers to change during the timber body dividing operation. The distance is adjusted from an initial value correlating to the real width of the timber body to a final value correlating to the real width minus the total thickness of the first saw band, enabling the system to adapt to different stages of the cutting process and prevent tilting of timber pieces.
Solution Approach 2:
The key parameter being changed is the mutual distance between the second support rollers. This parameter is dynamically adjusted during the operation to maintain proper engagement with the timber body at different cutting stages, thereby preventing dimensional deviations and tilting without requiring a completely complex restructuring of the support system.
2Reliability
If the mutual distance between second support rollers remains constant, then the device is easier to control, but lateral forces increase the risk of saw band breakage
Solution Approach 1:
The system dynamically adjusts the mutual distance between second support rollers during operation to maintain optimal engagement. This dynamic adjustment prevents excessive lateral forces on the saw bands by ensuring the support rollers remain properly positioned relative to the timber body as it is being cut, thereby reducing the risk of saw band breakage while maintaining automated control.
Solution Approach 2:
The system incorporates feedback mechanisms to automatically adjust the mutual distance between support rollers based on the actual width of the timber body and the cutting progress. This feedback control ensures that the support rollers maintain proper engagement without requiring manual intervention, thus reducing lateral forces on saw bands while preserving ease of operation through automated adjustment.
3Manufacturing precision
If support rollers engage the timber body at fixed positions, then the setup is simpler, but dimensional variations in timber pieces increase
Solution Approach 1:
The mutual distance between the second support rollers is changed as a controllable parameter during the timber body dividing operation. By adjusting this parameter from an initial distance correlating to the real width of the timber body to a final distance correlating to the real width minus the total thickness of the first saw band, the system maintains consistent dimensional accuracy throughout the cutting process without requiring overly complex adjustment mechanisms.
Solution Approach 2:
The support roller system transitions from a static configuration to a dynamic one where the mutual distance between rollers can change during operation. This dynamic capability allows the system to compensate for the removal of material by saw bands, maintaining proper support and guidance of timber pieces to ensure dimensional consistency without excessive mechanical complexity.
Data Source
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AI summary
The present invention relates to a machine and to a method for controlling such a machine (1) that comprises a feeder unit (4) and a sawing station (5), the feeder unit (4) being located upstream the sawing station (5), and wherein the sawing station (5 comprises a first sawing unit (6) comprising a set of first saw band(s) (8) and a pair of first support rollers (9), and a second sawing unit (7) comprising a set of second saw band(s) (10) and a pair of second support rollers (11), wherein the location of each support roller (9, 11) is adjustable in the transverse direction and wherein the support rollers (9, 11) are configured to engage the timber body (2). The method is characterized by the steps of feeding the timber body (2) by means of the feeder unit (4) into the sawing station (5) during the timber body dividing operation, wherein the pair of first support rollers (9) engage the timber body (2), positioning the pair of second support rollers (11) at an initial mutual distance correlating to the real width of the timber body (2), and decreasing the mutual distance between the pair of second support rollers (11) during the timber body dividing operation until reaching, at the end of the timber body dividing operation, a final mutual distance between the pair of second support rollers (11) correlating to the real width of the timber body (2) minus the total thickness of the set of first saw band(s) (8).