Adapter-Based Gripper Module for Fast Collet Size Change
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Solution Overview
Problem
Existing gripper modules for machining are inflexible and require multiple replacements of clamping heads and tubes to accommodate workpieces of different sizes, leading to increased costs and reduced precision due to the need for calibration.
Innovation Solution
A gripper module comprising a base, adapter holder, collet holder, and actuator, where the collet is detachably inserted into an axial hole, allowing for easy replacement and alignment of adapters and collets of various sizes, utilizing conical surfaces for precise positioning without manual calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If clamping heads and clamping tubes are replaced to accommodate workpieces of different sizes, then adaptability to various workpiece sizes is improved, but device complexity and calibration requirements increase
Solution Approach 1:
The gripper module employs a universal clamping tube that can accommodate multiple collet sizes through a standardized interface system. The adapter mechanism allows different collets to be mounted on the same clamping tube, eliminating the need for multiple clamping tubes and reducing device complexity while maintaining adaptability to various workpiece sizes
Solution Approach 2:
The design implements a nested structure where multiple collets of different sizes can be stored within the gripper module assembly when not in use. The adapter and collet mechanism allows smaller collets to be nested within or alongside larger components, optimizing space utilization and simplifying the overall device structure
2Adaptability or versatility
If clamping tubes are replaced, then adaptability to various workpiece sizes is improved, but manufacturing precision is reduced due to calibration needs
Solution Approach 1:
The adapter and collet interface is pre-calibrated during manufacturing with precise positioning features such as keyed interfaces, tapered surfaces, or定位 holes that ensure automatic alignment. This preliminary precision work eliminates the need for field calibration when replacing collets, maintaining manufacturing precision while enabling adaptability
Solution Approach 2:
The gripper module incorporates self-aligning features in the adapter-collet interface, such as self-centering mechanisms or automatic positioning elements, that ensure precise positioning without requiring external calibration tools or procedures. The system serves itself by automatically maintaining precision during collet replacement
3Adaptability or versatility
If multiple clamping heads and tubes are maintained for different workpiece sizes, then adaptability is improved, but loss of time and productivity decrease due to replacement and calibration requirements
Solution Approach 1:
The system segments the clamping function into modular components: a universal clamping tube, interchangeable adapters, and size-specific collets. This segmentation allows rapid replacement of only the necessary component (collet or adapter) without replacing the entire clamping assembly, significantly reducing changeover time and maintaining productivity
Solution Approach 2:
The gripper module incorporates quick-release mechanisms and spring-loaded locking systems that enable dynamic, tool-free replacement of collets and adapters. The mechanical design allows operators to rapidly swap components without manual calibration, reducing downtime and maintaining high productivity across different workpiece sizes
Data Source
AI summary
The present disclosure provides a gripper module, including a base, an adapter holder, a collet holder, and an actuator. The base is adapted for an adapter to be detachably disposed thereon. The adapter holder is able to engage and to buckle the adapter. The collet holder is able to engage and to buckle a collet which is installed in the adapter. The actuator is connected to the collet holder. The actuator can pull the collet holder and the collet to move, causing pressing and retraction of the collet by the conical surface between the collet and the adapter. Therefore, sizes of collets may apply to the gripper module with the adapter. By sheathing the adapter, replacement and size alternation of the collets are made easier, and precisions of allocations of the collet and the gripped workpiece are improved.