Automatic Tool Head Balancing Checks for Spindle Vibration Control
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Solution Overview
Problem
Machine tools experience unbalance issues due to unbalanced tool heads, leading to vibrations that affect processing quality and can cause spindle damage, with current balancing processes being costly and often omitted, resulting in unexpected unbalances and downtime.
Innovation Solution
A machine tool system with a balancing device that stores and compares balancing data for tool heads, allowing for pre-operational checks and adjustments to ensure balance matches processing parameters, thereby preventing unbalance-induced damage and prolonging spindle life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tool heads are balanced after assembly or before first service, then vibration and processing quality improve, but the balancing process is costly and time-consuming
Solution Approach 1:
The system performs preliminary balancing checks and stores balancing data in a balancing log during tool head assembly or before first service. This preliminary action allows the system to detect unbalance conditions before actual machining operations begin, avoiding costly downtime and re-balancing during production.
Solution Approach 2:
The patent replaces the traditional mechanical balancing process with an automated detection system using sensors (acceleration sensors) that measure vibrations and automatically compare measured values against stored balancing data. This substitution eliminates manual balancing operations and enables continuous automated monitoring.
2Reliability
If vibration monitoring is implemented during operation, then spindle damage is prevented, but processing must be stopped when vibrations exceed limits causing downtime
Solution Approach 1:
The system performs preliminary detection of unbalance conditions using stored balancing data before machining operations begin. By checking the balancing log in advance, the system can identify potentially problematic tool heads and take preventive measures, avoiding mid-operation stoppages and maintaining productivity.
Solution Approach 2:
The system continuously monitors vibrations during operation and compares real-time measurements against stored balancing data and threshold values. When deviations are detected, the control system provides feedback to adjust processing parameters or alert operators, enabling proactive management of unbalance conditions without immediate shutdowns.
3Loss of time
If balancing data is stored and compared before tool head coupling, then unbalance issues are detected early, but the system complexity increases
Solution Approach 1:
The system performs self-diagnosis by automatically reading and evaluating balancing data from stored logs when tool heads are coupled to the spindle. The control system autonomously compares measured vibrations against stored reference values and takes appropriate actions without requiring external intervention, reducing the need for complex external monitoring equipment.
Solution Approach 2:
The control system serves multiple functions: it controls machining operations, stores balancing data, performs vibration analysis, and manages tool head coupling. By integrating these functions into a single universal control system, the patent avoids the need for separate dedicated systems for each function, thereby reducing overall system complexity.
Data Source
AI summary
The invention relates to a machine tool system (1) comprising a machine tool (2) comprising a spindle (3) that can be rotatably driven for machining workpieces, with a plurality of tools each clamped in chucks (5), in the form of so-called tool heads (4), that can be coupled to the spindle (3), and a balancing device (8) for balancing the tool heads (4), the machine tool system (1) comprising a data memory (11) in which the balancing protocol associated with each system-associated tool head (4) is stored, and a controller (12) that reads balancing data from the balancing protocol, for a tool head (4) coupled to the spindle (3), and compares it with at least one parameter of the machining for which said tool head (4) is provided, or with at least one general balancing parameter, the machine tool system (1) preferably being designed such that it rejects a tool head (4) when there is no available balancing data for said tool head (4).