Machine Vise Jaw Inversion to Prevent Lifting
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Solution Overview
Problem
Conventional machine-tool vises experience jaw lifting and positional misalignment issues due to the slanted interface location between the jaw nut and bit, leading to uncertain workpiece location and reduced gripping ability, especially when clamping complex or thin workpieces.
Innovation Solution
The machine-tool vise employs an articulated two-piece movable jaw with a slanted interface located at the top of the jaw bit, eliminating secondary effects like deflection and lifting by stabilizing the jaw assembly with a bracket affixed to the bit, ensuring consistent clamping pressure without misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the slanted interface between jaw nut and bit is located below the jaw bit to make the solution more compact, then the device complexity is reduced, but the workpiece experiences undesired deflection and lifting
Solution Approach 1:
The patent inverts the conventional location of the slanted interface from below the jaw bit to above the jaw bit. This inversion changes the force transmission path so that the vertical component of the clamping force acts through the top of the bit, preventing the workpiece from lifting and deflecting while maintaining compact dimensions.
2Force
If clamping pressure is increased to firmly grip the workpiece, then the gripping ability is improved, but the movable jaw rises and tilts away from the workpiece causing positional misalignment
Solution Approach 1:
By inverting the slanted interface location to the top of the bit, the patent reverses the direction of the vertical force component. Instead of the jaw tilting upward as pressure increases, the force vector now acts downward through the bit, maintaining both high clamping pressure and precise workpiece positioning.
Data Source
AI summary
A machine-tool vise is described that employs an articulated two-piece movable jaw including a jaw nut that engages the lead screw and a jaw bit coupled to the jaw nut through a slanted interface wherein the slanted interface between the nut and the bit is located at the top of the bit to eliminate the secondary effects found in the prior art.