Grinding Machine Offset Detection and Axial Adjustment
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Solution Overview
Problem
Grinding machines, particularly spring end grinding machines, face challenges in efficiently and safely transferring workpieces between loading and grinding units due to height offsets between the loading table and grinding wheels, leading to jamming, suboptimal grinding positions, and potential damage to springs and grinding wheels.
Innovation Solution
An adjusting device with a rotatable turntable and height-adjustable loading plates, equipped with an offset detection unit using image detection or sensors, allows for precise alignment of workpieces with the grinding wheels, enabling automatic adjustment of grinding wheel positions to minimize offsets and ensure smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the loading table and grinding wheel are positioned with a height offset to allow workpiece insertion, then workpiece handling is simplified, but jamming and tilting occur disrupting operation
Solution Approach 1:
The grinding wheel is designed with dynamic height adjustability through an actuator system. The height of the grinding wheel relative to the loading table can be dynamically changed based on workpiece characteristics and process requirements. This dynamic adjustment capability allows the system to optimize the height offset to prevent jamming while maintaining reliable operation, resolving the contradiction between ease of insertion and operational continuity.
2Reliability
If a large safety distance is maintained between spring ends and grinding wheels during insertion, then damage is prevented, but optimal grinding position is not achieved requiring additional adjustment time
Solution Approach 1:
The system performs preliminary height adjustment of the grinding wheel before the workpiece insertion process begins. The actuator positions the grinding wheel at the optimal height relative to the loading table based on pre-stored reference values or workpiece measurements. This preliminary action ensures that when the workpiece is inserted, the optimal grinding position is already achieved, eliminating the need for additional adjustment time while maintaining appropriate safety distances to prevent damage.
Solution Approach 2:
The system incorporates feedback mechanisms through offset detection units that measure the actual position and height relationships between the loading table and grinding wheel. This feedback information is used to automatically adjust the grinding wheel height via the actuator, ensuring optimal positioning while maintaining safe clearance. The closed-loop control resolves the contradiction by continuously optimizing the position based on real-time measurements.
3Measurement precision
If manual adjustment using measuring devices is used, then positioning can be achieved, but operator safety is compromised and adjustment time increases
Solution Approach 1:
The system replaces manual mechanical measurement and adjustment operations with automated sensor-based measurement and actuator-based adjustment. Offset detection units (optical sensors, laser sensors, or cameras) automatically measure the height offset between the loading table and grinding wheel, eliminating the need for operators to use rulers or calipers. The control unit processes this measurement data and automatically commands the actuator to adjust the grinding wheel height, achieving both precise measurement and rapid adjustment while improving operator safety.
Solution Approach 2:
The system performs self-adjustment through automated measurement and control. The offset detection units continuously monitor the height relationship, and the control unit automatically commands the actuator to maintain optimal positioning without requiring operator intervention. This self-service capability eliminates manual adjustment time while maintaining measurement precision, directly resolving the productivity concern while preserving measurement accuracy.
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
The solution enhances the reliability and economy of the grinding process by reducing errors and safety risks, allowing for faster and more efficient processing with optimized grinding wheel positions, thereby preventing damage and improving workpiece handling.
Implementation Method 1
An adjusting device with a rotatable turntable and height-adjustable loading plates, equipped with an offset detection unit using image detection or sensors
Data Source
Figure 1a~1b
Figure 1c
Figure 2
AI summary
Adjustment device for a grinding machine (1), in particular a spring end grinding machine, wherein the adjustment device (2) comprises a loading unit (3), a grinding unit (4), and an offset detection unit (5). The loading unit (3) has at least one loading plate (31) rotatably mounted about a rotary axis (B) and has a plurality of receiving openings (32) for receiving workpieces (6), in particular coil springs, wherein the receiving openings (32) are arranged eccentrically to the rotary axis (B). The grinding unit (4) has at least one grinding wheel (41, 42) rotatably mounted about a rotary axis (C) that is substantially parallel to the rotary axis (B) of the loading plate (31), and an actuating drive (43, 44) by which the grinding wheel (41, 42) is axially movable.A radial overlap area of the loading plate (31) with the grinding wheel (41, 42) defines a grinding area (7) into which at least one workpiece (6) can be inserted for grinding by rotating the loading plate (31). At least one offset detection unit (5) is designed to detect an offset between a grinding surface (411, 421) of the grinding wheel (41, 42) and a workpiece end plane (61, 62) in which a workpiece end (63, 64), in particular a spring end, of a workpiece (6) held in the loading plate (31) moves outside the grinding area (7) when the loading plate (31) is rotated.