Automatic Fixture Replacement Mechanism for Faster CNC Batch Machining
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Solution Overview
Problem
Manual installation of fixtures in CNC machining centers is inefficient, particularly for batch processing of similar workpieces, leading to significant manpower wastage and reduced production efficiency.
Innovation Solution
An automatic fixture replacement mechanism featuring a movable manipulator with pins and pin holes, integrated with a two-dimensional moving mechanism, allows for automated clamping and unloading of fixtures, utilizing a pin plate with gourd-shaped holes and a tool turret for efficient installation and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual installation of fixtures is used in CNC machining centers, then the structure is simple and easy to operate, but production efficiency is reduced and manpower is wasted
Solution Approach 1:
The system uses the existing tool turret to perform dual functions: holding cutting tools and holding the manipulator for fixture installation. The manipulator automatically grabs fixtures from the rack and installs them on the workbench, enabling the system to serve itself without external manual intervention for fixture changes
Solution Approach 2:
The tool turret is designed to universally hold both cutting tools and the manipulator. The same rotational mechanism and holding structure that accommodates various cutting tools is also used to accommodate the manipulator, allowing one component to perform multiple functions and reducing overall system complexity
2Loss of time
If manual fixture installation is used, then the device complexity is low, but time is lost during fixture installation and unloading
Solution Approach 1:
The manipulator automatically performs the complete fixture installation and unloading sequence without human intervention. It grabs fixtures from the rack, positions them on the workbench, secures them with pins, and later removes them after processing, making the system self-servicing for all fixture handling operations
Solution Approach 2:
Fixtures are pre-positioned on the rack in the correct orientation before processing begins. The manipulator simply needs to grab and transfer them, eliminating the time-consuming manual alignment and positioning that would otherwise be required during installation
Data Source
AI summary
Automatic fixture replacement mechanism for machine tool, wherein includes multiple sets of fixtures for installing work pieces to be processed and a movable manipulator for loading fixture; the movable manipulator is installed on a two-dimensional movable mechanism; the movable manipulator is provided with a pull nail that is fastened to the clamp and the fixture is provided with a pin hole matching with the pin. For batch processing of a large number of work pieces with multiple fixtures, the use of movable manipulator to automatically install and unload fixtures can greatly improve the efficiency of processing. The structure of the mechanism and the operation are simple so that it is reliable and easy to be implemented. Hence, it can be widely used in various types of CNC machining centers.