Threaded Grinding Stone Phasing via Elastic Wave Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional phasing methods for threaded grinding wheels face challenges in precisely detecting contact or non-contact with workpieces and dressers due to the instantaneous nature of detection, leading to imprecise phasing and reduced grinding wheel life.
Innovation Solution
A method and device that utilize elastic wave detection to determine precise contact points between the threaded grinding wheel and dresser, adjusting dresser rotations to exceed a predetermined value, and storing phases to position the grinding wheel for feasible engagement, ensuring high-precision phasing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If elastic wave detection is used to detect contact between threaded grinding wheel and dresser, then measurement precision is improved, but device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent replaces conventional mechanical contact detection methods with elastic wave detection. An elastic wave sensor detects contact between the threaded grinding wheel and dresser by sensing elastic waves generated during contact, eliminating the need for complex mechanical detection mechanisms while achieving high measurement precision.
Solution Approach 2:
The patent introduces elastic waves as an intermediary to detect contact. Instead of directly measuring mechanical contact forces or positions, the system uses elastic wave propagation as a mediator to indirectly detect contact events, providing precise detection with simpler sensing equipment.
2Measurement precision
If the dresser rotation speed is increased to ensure contact detection, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent implements a feedback control mechanism where the elastic wave sensor continuously monitors contact between the grinding wheel and dresser. The detection results are fed back to the control unit, which adjusts the dresser rotation speed accordingly - increasing speed only when contact is detected or suspected, and maintaining or reducing speed when contact is confirmed or absent, thereby optimizing energy consumption while ensuring detection precision.
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 precise detection of contact or non-contact, allowing for accurate phasing of the threaded grinding wheel with the dresser, thereby improving the precision and longevity of the grinding process.
Implementation Method 1
detecting elastic waves generated when one of thread surfaces of the threaded grinding wheel comes into contact with a corresponding one of blade surfaces of the dresser
Data Source
AI summary
Provided is a method of phasing a threaded grinding stone, as well as a device therefor, the aforementioned method and device being such that contact or non-contact of a threaded grinding stone with a disk dresser can be detected with high accuracy, with the result that the phasing of the threaded grinding stone can be accurately performed. For the purpose of achieving the above, a threaded grinding stone (14) is phased with respect to a disk dresser (32) prior to the engagement of the threaded grinding stone (14) with the disk dresser (32) during dressing. In performing this phasing, it is determined whether or not the threaded grinding stone (14) contacted the disk dresser (32), on the basis of a voltage (V) which is commensurate with the amplitude of the elastic wave generated in the threaded grinding stone (14) at the time when the threaded grinding stone (14) contacted the disk dresser (32). In a case where the voltage (V) does not exceed a threshold value (Vo) even if the threaded grinding stone (14) contacts the disk dresser (32), then the rotational speed of the disk dresser (32) is increased, with the result that there is forcibly created a situation where it is determined that contact occurred. Subsequently, the threaded grinding stone (14) is positioned, on the basis of the resulting phase thereof, in an intermediate phase where the aforementioned engagement is feasible.