Rotational Blade With Concentric Bends For Vibration Control
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Solution Overview
Problem
Automatic industrial slicing machines face challenges in achieving higher productivity and precision due to limitations in blade strength, rigidity, and vibration, which affect the uniformity and thickness of sliced products.
Innovation Solution
A rotationally actuatable blade with a blade body featuring a central region for spindle fixation and a perimetric region with concentric circumferential bends that decrease in breadth, providing increased rigidity and reducing vibrations through a wave-like structure, and optionally reinforced with a thicker central region via welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade rotation speed is increased to achieve higher productivity, then the productivity increases, but the blade vibrations and bending moments increase, reducing cutting precision
Solution Approach 1:
The blade incorporates concentric circumferential bends (undulations) in the transition region between the central and perimetric areas. These curved structural features increase the moment of inertia of the blade cross-section, thereby enhancing rigidity and reducing vibrations at high rotation speeds while maintaining the ability to achieve high productivity
2Strength
If the blade thickness is increased to improve strength and rigidity, then the strength and rigidity increase, but the blade weight increases, affecting machine dynamics
Solution Approach 1:
Instead of uniformly increasing blade thickness, the invention uses concentric circumferential bends that strategically increase the moment of inertia where needed (in the transition region) without adding excessive weight. This curved geometry provides enhanced strength and rigidity while maintaining optimal blade dynamics
Solution Approach 2:
The blade features localized structural modifications in the transition region with concentric bends, while the central and perimetric regions maintain their original thickness characteristics. This local quality approach enhances strength where most needed without unnecessarily increasing overall blade weight
3Ease of manufacture
If conventional blade designs are used to maintain simplicity, then the manufacturing cost is low, but the rigidity and vibration resistance are insufficient for high-speed cutting
Solution Approach 1:
The concentric circumferential bends are integrated into the blade body as a continuous geometric feature that can be manufactured using conventional forming processes. This approach enhances rigidity through curved geometry without requiring complex assembly procedures or specialized manufacturing techniques, maintaining ease of manufacture while improving strength
Data Source
Figure 1~2
Figure 3
AI summary
A rotationally actuatable blade, particularly for automatic industrial slicing machines, the blade comprising a blade body (2) which extends around a main axis (3) and has a central region (4) for fixing a spindle for actuating the blade with a rotary motion about the main axis (3) and a perimetric region (5) which ends toward the outside with a sharp edge (6), the transition region (7), comprised between the central region (4) and the perimetric region (5), having a plurality of concentric circumferential bends (8-14) which follow each other with alternating bending directions and with extensions, parallel to the main axis (3), which decrease from the central region (4) in the direction of the perimetric region (5).