Universal Workholding Clamp for Zero-Backlash Machining
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Solution Overview
Problem
Conventional workpiece holding methods, such as bolting, clamping, and straight jaw vises, fail to maintain precise control over workpieces during machining due to static friction, mechanical force, and dynamic loads, leading to unwanted micro-movements and dimensional deviations, especially in high-tolerance applications like aerospace and medical devices.
Innovation Solution
A universal workpiece holding device with a securement member featuring a perimeter wall, stationary lip, and clamping member with a half-dovetail design, providing a zero backlash grip and adaptable clamping forces to secure workpieces, minimizing movement and ensuring precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional bolting, clamping, and straight jaw vises are used to hold workpieces, then the device complexity is low and ease of manufacture is high, but manufacturing precision deteriorates due to unwanted micro-movements and dimensional deviations under machining forces
Solution Approach 1:
The patent employs a spring-loaded clamping mechanism that dynamically adapts to workpiece positioning requirements. The spring force automatically adjusts to maintain optimal contact pressure between the clamping jaw and workpiece, eliminating micro-movements while accommodating variations in workpiece geometry and material properties without requiring complex active control systems
Solution Approach 2:
The patent introduces a specialized clamping jaw design with distributed contact surfaces and intermediate friction elements that mediate between the clamping force and workpiece. This intermediary mechanism enhances grip stability and prevents slippage under machining forces while maintaining simplicity in the overall holding device structure
2Manufacturing precision
If hydraulic and pneumatic vises with automated monitoring systems are used, then manufacturing precision is maintained through real-time force adjustment, but device complexity increases and cost becomes prohibitive for smaller machine shops
Solution Approach 1:
The patent implements a self-regulating spring-loaded clamping system that automatically maintains optimal clamping force throughout the machining operation. The spring mechanism self-adjusts to compensate for workpiece deflection, thermal expansion, and material variations without requiring external monitoring systems or active control, achieving hydraulic/pneumatic level precision with mechanical simplicity
Solution Approach 2:
The patent utilizes elastic deformation of spring elements to dynamically change the clamping force parameter in response to machining conditions. The spring constant and preload are carefully selected to provide sufficient holding force while accommodating normal variations in workpiece dimensions and machining loads, eliminating the need for automated monitoring and adjustment systems
3Reliability
If high-friction contact surfaces and precision-aligned gripping jaws are used in simple vices, then manufacturing precision improves for less stringent applications, but reliability deteriorates under high cutting forces and dynamic loads due to vibration and transient shifts
Solution Approach 1:
The patent employs a spring-loaded clamping mechanism that dynamically adapts to workpiece positioning requirements. The spring force automatically adjusts to maintain optimal contact pressure between the clamping jaw and workpiece, eliminating micro-movements while accommodating variations in workpiece geometry and material properties without requiring complex active control systems
Solution Approach 2:
The patent introduces a specialized clamping jaw design with distributed contact surfaces and intermediate friction elements that mediate between the clamping force and workpiece. This intermediary mechanism enhances grip stability and prevents slippage under machining forces while maintaining simplicity in the overall holding device structure
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 achieves consistent, high-precision machining by eliminating unintended movement, reducing material waste, and enhancing manufacturing efficiency through repeatable setups and modular adaptability.
Implementation Method 1
a spring member configured to push the clamping member from the open position to the closed position
Implementation Method 2
Conventional bolting, clamping, and straight jaw vises rely on static friction and mechanical force to restrain the workpiece
Data Source
AI summary
A universal workpiece holding device is disclosed for securing a workpiece during precision machining. The device includes a securement member with a perimeter wall forming an internal floor. A stationary lip is positioned along at least a portion of the interior perimeter, partially overhanging the floor. At least one opening is formed through the perimeter wall, accommodating at least one clamping member. The clamping member is movable between an open position, allowing the workpiece to be inserted onto the floor beneath the stationary lip, and a closed position, where it presses against the workpiece to secure it. This configuration provides enhanced stability, minimizing unwanted movement during machining operations. The device allows for secure retention of various workpieces while maintaining accessibility for adjustments and removals. Its design supports high-precision manufacturing by reducing backlash and improving clamping efficiency, ensuring reliable workpiece e positioning in demanding machining environments.