Modular Workholding Clamp Layout for Complex Machined Parts
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Solution Overview
Problem
Conventional work holding systems for machine tools are limited in their ability to securely hold a wide variety of shapes and sizes, particularly complex and delicate workpieces, leading to inefficiencies and increased costs due to the need for custom solutions and potential damage from clamping forces.
Innovation Solution
A modular work holding system with a base plate featuring multiple T-slots aligned along multiple axes, combined with various clamping devices such as wedge clamps and pivot clamps, allowing for secure holding of workpieces from multiple angles and preventing distortion, along with zero-point clamping for repeatable positioning and chip guards to prevent debris entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional T-slot tables with 3-5 grooves are used, then the system is simple and easy to operate, but it cannot securely hold complex and varied workpiece geometries
Solution Approach 1:
The base plate is segmented into multiple regions with different T-slot configurations (parallel slots, radial slots, concentric circular slots) to accommodate different workpiece types. Each slot pattern can be independently selected and combined based on the specific machining requirements, allowing the system to adapt to various geometries without requiring a completely different fixture for each application.
Solution Approach 2:
The base plate integrates multiple T-slot patterns (parallel, radial, concentric) into a single component, making it universally applicable to different workpiece geometries. The clamps can be positioned and oriented in multiple directions along different slot patterns, enabling one base plate to serve multiple functions that would traditionally require several different fixtures.
2Reliability
If custom work holding solutions are created for specific applications, then the workpiece can be securely held, but the solution is only useful for that specific application and increases costs
Solution Approach 1:
The clamp positions and orientations are made dynamic rather than fixed. Clamps can be moved along T-slots and rotated to different angles, allowing the same base plate and clamp set to be reconfigured for different workpieces. This dynamic adjustability maintains reliable workpiece holding while enabling reuse across multiple applications.
Solution Approach 2:
The system allows changing of geometric parameters (clamp positions, orientations, spacing) without changing the fundamental fixture structure. By adjusting these parameters, the same base plate can be optimized for different workpiece sizes, shapes, and machining operations, maintaining secure holding while increasing versatility.
3Ease of operation
If traditional clamping methods are used on T-slot tables, then the setup is simple, but delicate workpieces may be distorted by clamping forces
Solution Approach 1:
The T-slots are strategically positioned and oriented to allow clamps to apply forces at optimal locations on the workpiece. By selecting appropriate slot positions and orientations, clamping forces can be distributed to strengthen the workpiece structure rather than create distortion, maintaining both ease of setup and manufacturing precision.
Solution Approach 2:
The base plate and T-slot configuration are designed in advance to accommodate delicate workpieces. The pre-planned slot locations and orientations enable proper clamp placement that prevents distortion before machining begins, while still allowing quick setup through the standardized T-slot interface.
4Adaptability or versatility
If more T-slots are added to the base plate to increase versatility, then more workpiece configurations are possible, but the base plate becomes more complex and difficult to manufacture
Solution Approach 1:
The T-slot configuration uses asymmetric arrangements (radial slots emanating from center, concentric circular slots) that provide maximum versatility with minimal slot numbers. These asymmetric patterns are strategically designed to cover all necessary clamp positions and orientations for different workpiece geometries without requiring a symmetric grid pattern that would need many more slots.
Solution Approach 2:
The base plate incorporates T-slots in multiple dimensions and orientations (parallel linear slots, radial slots at different angles, concentric circular slots). By adding dimensional variety rather than simply increasing the number of slots in one pattern, the system achieves high versatility with a manufacturable base plate design.
Data Source
AI summary
A work holding clamp system for securing a workpiece to a work surface having a work surface T-slot arranged along an ‘X’ axis, comprised of a base plate secured to the work surface and having a plurality of T-slots, each of the plurality of T-slots are aligned with one of a plurality of axis including at least the ‘X’ axis and a ‘Y’ axis that is transverse to the ‘X’ axis. The work holding clamp system includes a workholding element selected from the group consisting of wedge clamps, pivot clamps and workstops, that may be secured within a T-slot of the plurality of T-slots provided in the base plate.