Impact Cutoff Vibration Damping for Cold Former
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Solution Overview
Problem
Prior art impact blank cutoff devices for progressive cold forming machines are complex, require high maintenance, and suffer from early wear and loss of cutoff accuracy due to impact-induced vibration and fatigue failure.
Innovation Solution
A simple, reliable, and durable impact cutoff device with a low mass rigid cutter carriage, torsion spring for carriage return, and an articulated, oil-lubricated and dampened carriage drive block on a pivoting drive lever, which reduces vibration and wear, ensuring consistent cutoff quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior art impact blank cutoff devices are used, then cutting function is achieved, but device complexity increases and maintenance requirements increase
Solution Approach 1:
The cutter assembly is divided into modular components including a cutter carriage, cutter blades, and a drive mechanism. This segmentation allows for simplified individual components that are easier to manufacture and maintain, while collectively achieving the required cutoff function without excessive complexity
Solution Approach 2:
The impact mechanism is extracted as a separate functional element within the drive system, allowing the main cutter carriage to remain simple while the impact function is achieved through a dedicated articulated drive block with damping features, reducing overall device complexity
2Reliability
If prior art impact blank cutoff devices are used, then cutting function is achieved, but wear increases and service life decreases
Solution Approach 1:
A damping feature is incorporated into the articulated drive block to absorb and reduce impact-induced vibrations before they can cause fatigue failure and wear of the cutter parts. This beforehand cushioning prevents vibration-related damage, extending the service life of the device while maintaining cutoff accuracy
Solution Approach 2:
The impact force necessary for high-speed cutting is converted into a controlled beneficial effect through the articulated drive block with oil lubrication and damping. The harmful vibrations are transformed into controlled motion with reduced wear, allowing high-speed operation without premature failure
3Productivity
If high velocity cutter mechanisms are used, then cutting speed increases, but impact induced vibration increases causing fatigue failure
Solution Approach 1:
The drive mechanism uses an articulated drive block that can dynamically adjust its motion characteristics during the cutting cycle. The pivoting action and oil lubrication system allow the mechanism to absorb shocks and reduce vibrations at high speeds, maintaining both productivity and reliability through dynamic adaptation
Solution Approach 2:
Oil lubrication and dampening is incorporated into the articulated drive block to hydraulically absorb impact-induced vibrations. This allows the cutter to operate at high velocities necessary for productivity while the hydraulic damping prevents fatigue failure by reducing vibrational stresses
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a robust and accurate blank cutoff mechanism with reduced wear and fatigue, maintaining high-speed cutting performance and improving the overall reliability and longevity of the device.
Implementation Method 1
a torsion spring for carriage return
Implementation Method 2
oil lubricated and dampened carriage drive block
Implementation Method 3
oil lubricated and dampened carriage drive block
Data Source
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AI summary
An impact cutoff device for a progressive high speed cold former having a low mass rigid cutter carriage, a torsion spring for carriage return, and an articulated, oil lubricated and dampened carriage drive block on a pivoting drive lever serving to reduce impact induced vibration otherwise leading to fatigue failure and wear of the various cutter parts and consequent loss of cutoff accuracy and quality.