Machine Tool Vibration Cutting Control for Feed-Synced Return Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vibration cutting, it is challenging to accurately perform cutting with vibration during the return movement of the cutting tool to a predetermined position corresponding to a specific feed amount.
Innovation Solution
A control device that sets a pulse-like signal for both the forward and return movements of the cutting tool, allowing for automatic vibration adjustment based on the predetermined feed amount by combining forward feed and return movements, enabling precise vibration cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cutting tool performs reciprocal movement including return movement in counter-machining direction, then the cutting tool can be fed with vibration, but it is not easy to perform cutting with vibration considering the return of the cutting tool to a predetermined position
Solution Approach 1:
The return position is calculated in advance based on the relationship between forward feed amount and return feed amount. The control device pre-determines the return position before the return movement begins, allowing the cutting tool to automatically return to the correct position without complex real-time control during the return movement.
Solution Approach 2:
The control device automatically calculates and adjusts the return position based on the predetermined relationship between forward and return feed amounts. The system serves itself by using the forward feed information to automatically determine the appropriate return position, eliminating the need for manual intervention or complex external control mechanisms.
2Manufacturing precision
If the cutting tool vibrates during reciprocal movement, then chip segmentation is improved, but precise positioning during return movement becomes difficult
Solution Approach 1:
The return position is calculated in advance based on the relationship between forward feed amount and return feed amount. The control device pre-determines the return position before the return movement begins, allowing the cutting tool to automatically return to the correct position without complex real-time control during the return movement.
Solution Approach 2:
The control device uses feedback from the forward feed amount to automatically adjust the return position. By monitoring the forward feed and applying the predetermined relationship, the system continuously adjusts the return position to maintain precision despite vibrations during the cutting process.
3Ease of operation
If automatic vibration setting is implemented, then ease of operation is improved, but control system complexity increases
Solution Approach 1:
The return position is calculated in advance based on the relationship between forward feed amount and return feed amount. The control device pre-determines the return position before the return movement begins, allowing the cutting tool to automatically return to the correct position without complex real-time control during the return movement.
Solution Approach 2:
The control device automatically calculates and adjusts the return position based on the predetermined relationship between forward and return feed amounts. The system serves itself by using the forward feed information to automatically determine the appropriate return position, eliminating the need for manual intervention or complex external control mechanisms.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A control device for a machine tool and a machine tool capable of easily performing cutting with vibration according to the amount of feed is provided. A control device (180) for a machine tool comprises a control means (181) for controlling the relative rotation and feeding of a cutting tool and a material, the control means performing control such that cutting is performed with vibrating the cutting tool relative to the material by combining a forward feed movement in the machining direction, in which the cutting tool machines the material, and a return movement in the counter-machining direction. A return position calculation section (191) for calculating a return position of the cutting tool at time when one vibration is completed on the basis of the number of vibrations and an amount of feed that are predetermined for one rotation of the cutting tool or the material, a forward feed setting section (192) for setting the forward feed movement on the basis of one or more change point setting values that determine a change point from the machining direction to the counter-machining direction, and making the cutting tool reach the determined change point, and a return movement setting means (193) for setting a pulse-like signal that is output as a command for the return movement so that the cutting tool reaches the calculated return position at time when one vibration is completed are included.