Machine Tool Control for Vibration-Safe Parallel Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Machine tools with multiple machining portions face challenges in maintaining machining accuracy and productivity due to vibrations affecting other operations, leading to increased cycle times when performing operations in parallel.
Innovation Solution
A machine tool configuration with multiple workpiece holders, working portions, and a control system that restricts the parallel execution of operations affected by vibrations, allowing other operations to proceed, thereby preventing vibration-induced inaccuracies and cycle time increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If machining is performed in parallel in multiple machining portions, then productivity is improved, but machining accuracy deteriorates due to vibration interference
Solution Approach 1:
The control portion segments the machining operations by identifying and separating vibration-prone operations from other operations. It divides the machining portions into groups where only operations that do not generate harmful vibrations are executed during active machining in other portions, thereby preventing vibration interference while maintaining parallel execution capability
Solution Approach 2:
The control system applies different execution rules to different machining portions based on their vibration characteristics. Machining portions prone to generating vibrations are restricted during their operation, while other portions continue operating. This localized control approach allows parallel execution in non-interfering portions while maintaining accuracy in vibration-sensitive portions
2Manufacturing precision
If machining in one portion is restricted during another portion's operation, then machining accuracy is maintained, but cycle time increases
Solution Approach 1:
The control portion applies partial restriction rather than complete shutdown. Instead of stopping all machining operations when one portion is machining, it selectively restricts only those operations that would generate harmful vibrations. Other non-interfering operations continue in parallel, reducing the time loss while still protecting machining accuracy
Solution Approach 2:
The system maintains continuous useful action by allowing non-vibration-prone operations to continue executing in parallel during machining operations. This ensures that the machining capacity is not completely idle during restricted periods, thereby minimizing cycle time extension while maintaining machining accuracy
3Manufacturing precision
If all operations in a machining portion are stopped during another portion's machining, then vibration interference is prevented, but productivity decreases
Solution Approach 1:
The control system segments operations into vibration-generating and non-vibration-generating categories. During machining in one portion, only the vibration-prone operations are restricted while non-vibration operations continue in parallel in other portions, preventing complete shutdown and maintaining productivity
Solution Approach 2:
The control portion dynamically changes the operational parameters of different machining portions based on real-time machining status. When one portion is machining, the system adjusts the execution state of other portions by changing their operational parameters (from active to restricted or vice versa), enabling flexible parallel execution that maintains both accuracy and productivity
Data Source
AI summary
The machine tool includes modules and a control portion. Each of the modules includes a main spindle for holding a workpiece and a tool post for holding a tool. The tool is used to machine the workpiece held by the main spindle. The control portion is configured to control to restrict a parallel execution of predetermined machining for the workpiece and machining affected by the predetermined machining and to permit an execution of machining other than the restricted machining.