Multi-blade Cutting Strip for Wood Planing Noise Reduction
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Solution Overview
Problem
Conventional wood planing machine cutters face high energy consumption and noise due to large contact areas between cutting strips and workpieces, leading to reduced efficiency and frequent damage, while spiral blade designs are costly and difficult to manufacture.
Innovation Solution
A multi-blade cutting strip with staggered and aligned cutting blades on a rotary shaft, reducing contact area and noise, and allowing for easy replacement and lower manufacturing costs by eliminating the need for complex shaft processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the contact area between cutting strip and workpiece is large, then the cutting force is sufficient, but the energy consumption increases and noise is generated
Solution Approach 1:
The cutting strip is divided into multiple cutting blades (at least two) with cutting edges distributed along the longitudinal direction. Each cutting blade independently contacts and planes the workpiece surface, segmenting the originally large contact area into multiple smaller contact points, thereby reducing total contact area and energy consumption while maintaining sufficient cutting force through distributed blades
2Force
If the contact area between cutting strip and workpiece is large, then the cutting force is sufficient, but noise is produced
Solution Approach 1:
The cutting strip is divided into multiple cutting blades (at least two) with cutting edges distributed along the longitudinal direction. Each cutting blade independently contacts and planes the workpiece surface, segmenting the originally large contact area into multiple smaller contact points, thereby reducing total contact area and noise generation while maintaining sufficient cutting force through distributed blades
3Shape
If spiral side surfaces are processed on the shaft, then the cutting blades can be disposed in spiral manner, but the manufacturing cost and processing difficulty increase
Solution Approach 1:
Instead of processing spiral side surfaces on the shaft to achieve spiral blade arrangement, the invention inverts the approach by directly disposing cutting blades along the longitudinal direction of a simple cylindrical shaft. This eliminates the need for complex spiral processing of the shaft while achieving effective cutting through multiple distributed blades
Solution Approach 2:
The cutting function is segmented into multiple independent cutting blades distributed along the longitudinal direction of a simple cylindrical shaft. This segmentation allows each blade to perform cutting independently without requiring the shaft itself to have complex spiral geometry, simplifying shaft manufacturing while maintaining effective cutting capability
Data Source
AI summary
A cutter includes a rotary shaft having a longitudinal axis and a plurality of circumferentially spaced-apart multi-blade cutting strips each of which includes a plurality of cutting blades spacedly provided at at least one longitudinal side edge of a cutting strip body thereof. Each cutting blade of each cutting strip has a portion (P1) staggered with respect to an adjacent cutting blade of an adjacent cutting strip along a circumferential direction around the longitudinal axis, and a remaining portion (P2) aligned with the adjacent cutting blade of the adjacent cutting strip along the circumferential direction. The portion (P1) has an offset length (D) measured along the longitudinal direction.