Grinding Disc Speed Detection via Non-Contact Wave Reflection
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Solution Overview
Problem
Conventional grinding machine tools fail to accurately detect the speed of random eccentric orbital motion of grinding discs, leading to inaccurate control of mechanical arms in precision industrial grinding operations.
Innovation Solution
A grinding machine tool with a grinding disc equipped with detected members defining a detection area greater than or equal to twice the eccentric distance, and an active detection member that emits and receives waves to output a detection signal, allowing for precise measurement of the random eccentric orbital motion speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the grinding disc is driven by inertial centrifugal force without direct linkage to the driving shaft, then the grinding disc can perform random eccentric orbital motion, but the rotational speed of the grinding disc cannot be accurately detected
Solution Approach 1:
A non-contact detection member is introduced as an intermediary between the grinding disc and the detection system. This detection member, positioned on the grinding disc, interacts with a stationary sensor to enable speed detection without mechanical linkage, thus preserving the random eccentric orbital motion capability while enabling accurate measurement
Solution Approach 2:
The patent replaces mechanical connection-based speed detection with a non-contact detection system using optical or electromagnetic fields. The detection member on the grinding disc interacts with a stationary sensor through field interaction rather than mechanical contact, eliminating the need for direct linkage while enabling speed measurement
2Device complexity
If the rotational speed of the driving shaft is used as the rotational speed of the grinding disc, then the control system is simple, but the actual rotational speed of the grinding disc cannot be reliably known
Solution Approach 1:
The patent implements a feedback mechanism where the actual speed of the grinding disc is continuously detected by the non-contact detection system and fed back to the control system. This allows the control system to adjust based on actual grinding disc speed rather than assuming it matches the driving shaft speed, improving reliability while maintaining reasonable system complexity
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
Enables accurate control of automated equipment in precision industrial grinding by reliably detecting the speed of the grinding disc's random eccentric orbital motion, enhancing the precision and efficiency of grinding operations.
Implementation Method 1
an active detection member that emits and receives waves to output a detection signal
Data Source
AI summary
A grinding machine tool with random eccentric orbital motion speed detection, the grinding machine tool comprises a body and a grinding disc, the body comprises a driving shaft and a tool holder connecting the grinding disc and having an eccentric distance relative to the driving shaft, and the grinding disc performs grinding in a random eccentric orbital motion when the driving shaft rotates. The grinding disc comprises at least one detected member on a side of the grinding disc facing the body for detecting a speed of the random eccentric orbital motion, and the at least one detected member defines a detection area with a range greater than or equal to twice the eccentric distance. Thereby, an accurate speed of the grinding disc performing the random eccentric orbital motion is obtained, so that the grinding operation of precision grinding which is gradually performed by automation is more precisely controlled.