Magnetic Pre-Clamping for Non-Magnetizable Workpiece Positioning
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Solution Overview
Problem
Existing work clamping devices face challenges in securely clamping non-magnetizable materials and maintaining accurate positioning, especially when the workpiece tilts due to variations in size, weight, and center of gravity, leading to gaps and reduced processing accuracy.
Innovation Solution
A work clamping device featuring a receiving member with a V-shaped receiver and a pre-clamping positioning member made of ferromagnetic material, which is attracted by a magnet to temporarily hold the workpiece, ensuring stable clamping regardless of posture and allowing for adjustable attraction force to prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a magnet is used to clamp the workpiece, then clamping force is improved, but non-magnetizable materials cannot be clamped
Solution Approach 1:
A ferromagnetic intermediary member is introduced between the magnet and the workpiece. The magnet attracts the ferromagnetic intermediary member, which in turn contacts and clamps the workpiece. This intermediary approach enables clamping of non-magnetizable materials while maintaining magnetic attraction force.
2Device complexity
If the workpiece is positioned without temporary holding, then device complexity is reduced, but positioning accuracy deteriorates due to tilting
Solution Approach 1:
The ferromagnetic intermediary member is attached to the workpiece in advance, creating a temporary magnetic bond that pre-holds the workpiece in the correct position. This preliminary action prevents tilting during the clamping process and ensures accurate positioning without requiring complex positioning mechanisms.
3Reliability
If strong magnetic force is applied, then clamping stability is improved, but workpiece deformation increases
Solution Approach 1:
The ferromagnetic intermediary member acts as a buffer between the magnetic force and the workpiece. It distributes the clamping force over a larger area and provides a mechanical interface that prevents concentrated stress, thereby maintaining clamping stability while avoiding workpiece deformation.
4Measurement precision
If reference pins are inserted for positioning, then horizontal positioning accuracy is improved, but device complexity and operation time increase
Solution Approach 1:
The mechanical reference pin positioning system is replaced with a magnetic positioning system. The ferromagnetic intermediary member is attracted to the magnet at a predetermined location, achieving horizontal positioning through magnetic force rather than mechanical insertion. This substitution reduces device complexity and operation time while maintaining positioning accuracy.
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 device provides stable clamping and flexibility in positioning, preventing tilting and maintaining accurate processing by maintaining contact between the workpiece and the receiving member, even with non-magnetizable materials, and allows for easy adjustment of the attraction force.
Implementation Method 1
a pre-clamping positioning member which is to be attached to the columnar portion and which temporarily hold the columnar portion to the receiving member by being attracted to the attraction member by magnetic force
Data Source
AI summary
This work clamping device including a receiving member which has a first contacting surface which comes into contact with a first circumference position of an outer circumference surface of a columnar portion of a work and a second contacting surface which comes into contact with a second circumference position of the outer circumference surface of the columnar portion, an attraction member which is provided in the receiving member and which is made of a ferromagnetic material or a magnet, a pre-clamping positioning member which is attached to the columnar portion and which temporarily hold the columnar portion to the receiving member by being attracted to the attraction member by magnetic force, and a clamp mechanism which presses the columnar portion temporarily positioned by the pre-clamping positioning member toward the receiving member.