Fluid-Actuated Tool Bit Transfer for Robotic Tool Changes
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Solution Overview
Problem
Current tool bit replacement methods in robotic devices are time-consuming and require the device to be powered down, reducing efficiency and safety due to manual operation.
Innovation Solution
A tool changing system with a tool mount adapter and tool holder that uses fluid ports to move between locked and unlocked positions, allowing for automated and rapid tool bit changes without concurrent locking, utilizing a piston with a tapered section and ball bearing mechanism for secure engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual tool bit replacement is used, then the device can be operated safely with user control, but the replacement process is time-consuming and reduces productivity
Solution Approach 1:
The system enables automated tool bit replacement without requiring user intervention. The robotic device performs the entire replacement sequence autonomously using programmable control, eliminating the need for manual operation and allowing continuous operation without safety shutdowns.
Solution Approach 2:
The manual mechanical operation of moving the collet and replacing tool bits is replaced with an automated system using fluid pressure (pneumatics or hydraulics) to move the collet and a programmable controller to sequence the replacement operations, significantly increasing speed and consistency.
2Ease of operation
If manual tool bit replacement is used, then the user can control the process, but the device must be powered down during replacement which extends the time period
Solution Approach 1:
The automated system performs all replacement operations without requiring the device to be powered down. The programmable controller manages the entire sequence autonomously, eliminating idle time and allowing the device to remain energized throughout the replacement process.
Solution Approach 2:
Multiple tool bits are pre-loaded into the device in advance. The system is programmed with the sequence of tool bit changes before operation begins, allowing immediate replacement without waiting for initialization sequences or power cycles.
3Productivity
If automated fluid pressure system is used, then rapid tool bit changes are enabled, but the system complexity increases with multiple pistons and fluid ports
Solution Approach 1:
The fluid pressure system serves multiple functions: it moves the collet for releasing tool bits, positions the tool holder for receiving new tool bits, and secures tool bits in place. This multi-functional approach consolidates what would otherwise require separate mechanisms into a single integrated system.
Solution Approach 2:
The tool holder and tool mounting adapter are combined into an integrated assembly that works together with the collet mechanism. The fluid pressure system controls both the collet and tool holder movements through coordinated piston actions, reducing the need for separate control systems.
4Reliability
If concurrent locking mechanism is used, then tool bit security is maintained during replacement, but the risk of accidental contact increases
Solution Approach 1:
The system uses programmable control to monitor and coordinate the positions and locking states of both the tool holder and tool mounting adapter. This feedback mechanism ensures that only one component is locked to the tool bit at any given time, preventing simultaneous engagement that could cause accidental contact or mechanical interference.
Solution Approach 2:
The locking mechanism transitions dynamically between states, with the system programmatically controlling which component (tool holder or tool mounting adapter) is locked at any moment. This dynamic control allows seamless transfer of tool bit custody between components without maintaining concurrent locks, reducing safety risks while preserving security.
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
Enables quick and safe tool bit changes without powering down the robotic device, improving operational efficiency and reducing the time required for tool bit replacements.
Implementation Method 1
Each of the tool mount adapter and the tool holder are configured to move between a locked position to lock to the tool bit when fluid is introduced through the first port and an unlocked position to unlock from the tool bit when fluid is introduced through the second port
Implementation Method 2
a channel that extends through the first piston and is sized to receive the rod with the channel comprising a tapered section with a tapered width that extends along the rod
Data Source
AI summary
A tool changing system that includes a tool mount adapter and a tool holder. The tool mount adapter is configured to be attached to a tool and selectively engage and disengage a tool bit. The tool provides movement to the engaged tool bit to perform work on a workpiece. The tool holder is positioned in proximity to hold the tool bit when the tool bit is not engaged by the tool. The tool holder can also selectively engage and disengage the tool bit.