Oscillating Shear Cutting Geometry for Low-Vibration Sheet Metal
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Solution Overview
Problem
Existing cutting devices for oscillating multifunction machine tools face challenges in achieving efficient and precise cutting of sheet metal workpieces while minimizing vibration and manufacturing complexity.
Innovation Solution
The cutting device features a shearing unit with a base body and a blade, where the cutting edge and backing edge are rigidly disposed relative to each other, and an angular bisector of the cutting opening angle is oriented between 70° and 110° to the radial axis, facilitating a low-vibration shear operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting edge and backing edge are rigidly disposed relative to each other with specific angular orientation, then cutting precision and vibration reduction are improved, but manufacturing complexity increases
Solution Approach 1:
The cutting edge and backing edge are merged into a single rigid shearing unit structure, eliminating the need for separate positioning mechanisms. This integration maintains precise angular orientation (70°-110°) while simplifying manufacturing by reducing the number of components and assembly steps.
Solution Approach 2:
The cutting device employs asymmetric angular orientation of the cutting edge relative to the radial axis (70°-110° range) to optimize cutting performance. This asymmetric configuration reduces vibration during oscillating cutting operations while maintaining structural simplicity through the rigid monolithic design.
2Strength
If the shearing unit is made entirely of metal material, then mechanical strength is improved, but manufacturing cost increases
Solution Approach 1:
The patent specifies metal materials with particular property ranges (density 7.8-8.5 g/cm³, elongation 5-15%) to optimize the balance between mechanical strength and manufacturability. These parameter specifications enable cost-effective material selection while ensuring adequate strength for oscillating cutting operations.
3Object-affected harmful factors
If the cutting device is designed for low-vibration operation, then cutting quality is improved, but device complexity increases
Solution Approach 1:
The cutting device utilizes periodic oscillating motion with controlled amplitude (0.5-5 mm) and frequency (50-500 Hz) to achieve low-vibration cutting. This periodic action allows simple structural design while maintaining cutting quality through optimized motion parameters rather than complex vibration damping mechanisms.
Data Source
AI summary
A cutting device for an oscillating multifunction machine tool includes at least one shearing unit with at least one base body, a cutting edge and a backing edge. The cutting edge and the backing edge bound a cutting opening for inserting a workpiece. The cutting device further includes a tool interface for attaching the shearing unit to a tool holder of the multifunction machine tool. The cutting edge and the backing edge are disposed rigidly relative to one another and an angular bisector of a cutting opening angle of the cutting opening is disposed in a plane perpendicular to an oscillation axis of the tool interface, at an angle between 70° and 110° to a radial axis of the tool interface, which is perpendicular to the oscillation axis and passes through an intersection point of the cutting edge and the backing edge.