Movable Pallet Hook Prevents Interference in Machine Tools
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Solution Overview
Problem
Conventional pallet devices in machine tools often have hooks that interfere with workpieces or tools, leading to inefficiencies and potential damage during machining processes.
Innovation Solution
A pallet device with a movable replacement hook that can be retracted or projected using a fluid-driven mechanism, allowing for secure clamping and positioning to prevent interference with workpieces or tools, and a position maintaining system to ensure accurate hook placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hooks are fixed to pallets for gripping by machines, then pallet replacement is enabled, but hooks interfere with workpieces or tools during machining
Solution Approach 1:
The hook is changed from a fixed structure to a movable structure that can extend and retract. The movable hook extends when gripped by the robot for pallet replacement, and retracts during machining to avoid interfering with workpieces or tools. This dynamic configuration resolves the contradiction between enabling pallet replacement and preventing interference during machining operations.
2Object-affected harmful factors
If hooks are retracted to avoid interference, then workpiece machining is improved, but pallet gripping and replacement becomes difficult
Solution Approach 1:
The hook dynamically changes its position based on operational requirements. It extends to a projection position when the robot needs to grip the pallet for replacement, and retracts to a retraction position during machining to avoid interference. This dynamic positioning enables both functions to be performed effectively without compromise.
3Adaptability or versatility
If different hook positions are used for different pallet types, then specific pallet requirements are met, but robot hand adjustments are required frequently
Solution Approach 1:
The movable hook configuration enables a single robot hand to grip all types of pallets universally. The hook extends to engage with the robot hand during replacement operations regardless of pallet type, eliminating the need for frequent robot hand adjustments. This universal gripping capability reduces downtime and improves overall system efficiency.
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 solution enhances the efficiency of pallet handling and machining by preventing hook interference, allowing for common hook positions across various pallet types and reducing the need for frequent robot hand adjustments, thereby improving work efficiency and shortening cycle times.
Implementation Method 1
a cylinder configured to movably receive the replacement hook and move the replacement hook to the projection position by a pressure of a fluid supplied thereinto from a fluid supply section
Implementation Method 2
a biasing section configured to bias the replacement hook toward the retraction position
Implementation Method 3
a second cylinder configured to move the engagement section to the second retraction position by a pressure of a fluid supplied thereinto from the fluid supply section
Data Source
AI summary
A pallet device which can prevent a hook fixed to a pallet from interfering with a workpiece or a tool for a machine tool. The pallet device includes a pallet including a pallet main body which clamps a workpiece, and a replacement hook movably provided in the pallet main body, the replacement hook being movable between a projection position at which the replacement hook projects outside the pallet main body and a retraction position to which the replacement hook is retracted from the projection position to the pallet main body, and a jig to and from which the pallet is attached and detached.