Knotted Fence Mesh Cam Assembly for Smoother High-Speed Forming
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Solution Overview
Problem
Conventional cam-driven knotted fence mesh forming machines suffer from speed limitations and vibrations due to non-simultaneous tool movements, requiring manual calibration and alignment adjustments.
Innovation Solution
A cam drive system with synchronized pairs of formers that simultaneously accelerate and decelerate, utilizing a front and rear cam assembly with specific cam profiles to optimize energy transfer and reduce vibrations, allowing for smoother operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional cam-driven machines operate with non-simultaneous tool movements, then the machine structure is simpler, but the operating speed is limited and vibrations increase
Solution Approach 1:
The patent combines multiple cam assemblies (front and rear) into a synchronized drive system where all formers move simultaneously. This merging of drive functions eliminates the sequential operation of conventional machines, enabling higher operating speeds while maintaining structural coherence through unified cam synchronization.
Solution Approach 2:
The cam profiles are designed with dynamic characteristics that allow simultaneous acceleration and deceleration of multiple formers. This dynamic cam design enables coordinated motion of all tools during each beat, increasing operating rate from conventional 80 bpm to over 100 bpm while reducing vibrations through balanced motion patterns.
2Stability of the object's composition
If conventional machines use non-simultaneous tool movements, then the cam drive system is simpler, but vibrations increase and components move out of alignment
Solution Approach 1:
The front and rear cam assemblies are merged into a synchronized drive system where all formers move simultaneously. This unified approach maintains consistent relative positions of all components throughout the knitting cycle, preventing alignment drift and eliminating the need for frequent calibration adjustments.
Solution Approach 2:
The dynamic cam profiles coordinate the simultaneous acceleration and deceleration of all formers, creating balanced vibrational forces that cancel each other out. This dynamic synchronization maintains component alignment stability while reducing overall machine vibrations compared to sequential operation.
3Productivity
If conventional machines operate at lower speeds, then energy consumption is lower per beat, but the overall productivity is reduced
Solution Approach 1:
The dynamic cam profiles optimize energy transfer by coordinating simultaneous acceleration and deceleration of multiple formers. This dynamic motion pattern reduces peak torque requirements and distributes energy consumption more efficiently across the drive system, enabling higher operating speeds (over 100 bpm) without proportionally increasing total energy consumption.
Solution Approach 2:
The synchronized cam drive system creates periodic motion patterns where all formers accelerate and decelerate in unison during each beat. This periodic coordination improves energy efficiency by creating balanced load cycles, allowing the machine to operate at higher speeds with reduced overall energy consumption compared to conventional sequential operation.
Data Source
AI summary
A machine for forming knotted fence mesh has a plurality of side by side knot boxes. Each knot box is for forming a knot at an intersection between a line-wire and a stay-wire. Each of the knot boxes has a first pair of formers configured to move towards the line-wire-stay-wire intersection from a front side forming a knot at the line-wire-stay-wire intersection at each operation of the knot box, and a second pair of formers configured to move towards the line-wire-stay-wire intersection from a rear side at each operation of the knot box. The machine has a cam drive system configured to move a plurality of the first pair of formers and the second pair of formers at each operation of the knot boxes. The cam drive system has a front cam assembly having a front pair of cams associated with the first pair of formers and a rear cam assembly having a rear pair of cams associated with the second pair of formers, wherein each of the cams has a respective profile. The profiles of each of the front pair of cams associated are configured such that during a sector of a rotation of the front pair of cams associated, one of the first pair of formers accelerates while the other of the first pair of formers simultaneously decelerates.