Machine Tool Center of Gravity Calculation
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Solution Overview
Problem
Conventional methods for determining the position of a machine tool's center of gravity during transport are inefficient, often requiring repeated corrections and potentially straining mechanical components, especially when the predicted center of gravity differs significantly from the true position.
Innovation Solution
A numeric control device for machine tools that calculates and displays the center of gravity position based on stored weights and positions of fixed and movable units, allowing for accurate estimation and stable posture during transport, even when the load's weight is unknown, using input units, load weight estimation, and reference marks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position of the center of gravity is predicted and the lift is raised at a temporary position with repeated corrections, then the center of gravity position can be determined, but the number of steps increases and mechanical components are subjected to repeated stress
Solution Approach 1:
The numeric control device performs preliminary calculation of the center of gravity position using stored weight and position data of fixed and movable units before the actual lifting operation. This preliminary action provides an accurate initial position prediction, eliminating the need for repeated trial-and-error corrections during the lifting process.
Solution Approach 2:
The numeric control device acts as an intermediary that integrates weight and position information from various components (fixed unit, movable unit, and load) to calculate and provide the accurate center of gravity position. This intermediary calculation function replaces the need for manual trial-and-error positioning methods.
2Measurement precision
If the position of the center of gravity is predicted and repeated corrections are made, then the center of gravity position can be determined, but stress is given to the mechanical components due to repeated raising and lowering
Solution Approach 1:
The center of gravity position is calculated in advance using the numeric control device before the lifting operation begins. This preliminary calculation ensures that the lift is positioned correctly from the start, preventing repeated raising and lowering that would subject mechanical components to unnecessary stress and potential damage.
3Adaptability or versatility
If the insertion position of the lift is not determined and the position of movable unit and load weight vary, then the machine tool can be moved flexibly, but it becomes necessary to determine the lift position in accordance with the center of gravity position
Solution Approach 1:
The numeric control device automatically calculates the center of gravity position by integrating weight and position information from the fixed unit, movable unit, and load. This self-service calculation function eliminates the need for manual determination methods and provides accurate center of gravity information regardless of how the load distribution varies, maintaining flexibility while managing complexity.
Data Source
AI summary
A machine tool having a numeric control device is configured such that a storage unit of the numeric control device stores a weight and a position of a center of gravity of a fixed unit and a movable unit of the machine tool, and the position of the center of gravity of the entire set including the machine tool and the load is calculated using the weights and the positions of the center of gravity, the weight and the position of the center of gravity of the load, and a relative position of the movable unit of the machine tool.