Machining Program Read Control and Fan Speed for Precision CNC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Machine tools face challenges in maintaining machining accuracy and productivity due to vibration from cooling fan rotation and heat generation during high-precision and high-speed operations, as existing control devices cannot effectively manage these factors.
Innovation Solution
A control device and method that adjust the number of blocks to read from a machining program and the fan rotational speed based on allowable machining error or feed rate input by the operator, using a storage unit and fan control unit to optimize cooling and reduce vibration and heat-related delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the cooling fan rotates at high speed to cool the control device during high-speed machining, then the cooling effect is improved, but vibration is generated that transmits to the workpiece and deteriorates machining accuracy
Solution Approach 1:
The fan rotational speed is dynamically adjusted based on the machining mode. During high-speed machining, the fan rotates at higher speed to provide sufficient cooling. During high-precision machining, the fan rotational speed is reduced to minimize vibration transmission to the workpiece, thus resolving the contradiction between cooling effectiveness and machining accuracy.
Solution Approach 2:
The control device changes the operational parameters of the cooling fan based on the machining requirements. By adjusting the fan rotational speed parameter according to the selected machining mode (high-speed or high-precision), the system optimizes both cooling performance and vibration control to maintain productivity.
2Productivity
If the number of blocks to be read is increased to improve processing speed during high-speed machining, then machining speed is improved, but the processing load on the control device increases causing heat generation
Solution Approach 1:
The system dynamically adjusts both the number of blocks to be read and the fan rotational speed based on the machining mode. During high-speed machining, more blocks are read per unit time to maintain productivity, and the fan speed is simultaneously increased to handle the additional heat generation from the increased processing load.
3Manufacturing precision
If the fan rotational speed is reduced to minimize vibration during high-precision machining, then machining accuracy is improved, but the cooling power is insufficient when processing load increases
Solution Approach 1:
The control device adjusts the fan rotational speed parameter according to the machining mode. During high-precision machining, the fan speed is reduced to minimize vibration and improve accuracy. The system monitors the machining conditions and can increase cooling power when processing load increases, thus resolving the contradiction between vibration control and cooling effectiveness.
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
This approach prevents deterioration of machining accuracy and lengthening of machining time, thereby maintaining productivity by adapting to the required machining conditions.
Implementation Method 1
a fan motor (M5) that rotates the cooling fan (32)
Data Source
AI summary
A processing executing unit of a control device is configured to set the number of blocks to be read indicating the number of blocks to be read from a storage unit per unit time and a fan rotational speed of a fan motor in accordance with the amount of allowable machining error or a feed rate of a table that is inputted by an operator, and further configured to read a machining program from the storage unit block by block at the set number of blocks to be read and cause a fan control unit to perform a process to drive the fan motor at the set fan rotational speed.