Crankshaft Grinding Machine Adaptive Contour Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grinding technologies fail to precisely measure and correct shape deviations, such as circularity defects, during the grinding process, especially for high-precision components like crankshafts, as measurements are typically taken at the center of the grinding disc, limiting adaptive control and precision.
Innovation Solution
A method and grinding machine that use a measurement device to detect dimensions and shape in multiple planes along the grinding disc, allowing for continuous in-process measurement and adaptive correction of the workpiece contour via CNC control, enabling precise measurement and correction of shape deviations like circularity, conicity, and concavity during grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement is taken at the center of the grinding disc, then the measurement process is simple, but the measurement precision and ability to detect shape deviations is insufficient
Solution Approach 1:
The measurement process is segmented into multiple measurement planes along the grinding disc width, with each plane providing localized measurement data. This segmentation allows comprehensive detection of shape deviations across the entire workpiece surface while maintaining manageable system complexity through modular measurement approach
Solution Approach 2:
The measurement system transitions from single-point center measurement to multi-plane measurement along the grinding disc width (Z-axis direction). This dimensional expansion enables detection of shape deviations such as circularity defects that cannot be detected by center-only measurement, thereby improving measurement precision without excessive complexity increase
2Manufacturing precision
If adaptive control is implemented based on real-time measurement, then the manufacturing precision is improved, but the device complexity and control system complexity increase
Solution Approach 1:
The system implements continuous feedback by measuring the actual workpiece contour in multiple planes during grinding and comparing it with the target contour. The CNC control system automatically adjusts grinding parameters based on this feedback, achieving high manufacturing precision through closed-loop control while managing complexity through integrated measurement and control architecture
Solution Approach 2:
The measurement system serves the grinding process directly by providing real-time data that automatically controls the grinding operation. The system is self-regulating, where measurement results immediately influence subsequent grinding actions without requiring external intervention, thereby improving precision while keeping the control system streamlined
3Measurement precision
If multiple measurement planes are used to detect shape deviations, then the measurement precision is improved, but the measurement time and productivity are reduced
Solution Approach 1:
The measurement process is integrated continuously into the grinding operation, with measurements taken in multiple planes without interrupting the grinding flow. The system performs useful measurement actions continuously throughout the grinding process, achieving high measurement precision while maintaining productivity through seamless integration rather than sequential measurement steps
Data Source
AI summary
A grinding machine and a method for measuring and producing a target outer contour is disclosed, particularly for a pin-bearing journal of a crankshaft. First, a measurement device acquires measurement values for the dimensions and shape of a workpiece in at least two measurement planes that are spaced apart and extend transversely to a longitudinal extension of a workpiece region. The measurement planes are produced by a relative movement of the workpiece region and the measurement device in a Z axis direction, relative to the movement of a grinding disc in the direction of the Z-axis thereof. These measurement values are transmitted to a CNC system for advancing a grinding disc, such that any deviations from the target contour that may be present are corrected, and the target contour of the workpiece region in question is ground adaptively on the basis of the measurement values.