RFID Grinding Cup Control for Stable Rock Bit Tip Grinding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing grinding systems for rock drill bits and cutters face issues such as vibration, noise, wear, and inefficiencies due to high rotational speeds, large compressor requirements, and long grinding times, with a lack of data management and performance monitoring.
Innovation Solution
The development of a grinding apparatus equipped with a control system that includes a programmable operator control panel, a microprocessor or microcontroller, and an RFID system for monitoring and controlling operational parameters, such as grinding time, rotational speed, and coolant flow, while also tracking the usage and performance of grinding cups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high rotational speeds are used in grinding machines, then grinding efficiency is improved, but vibration and noise increase
Solution Approach 1:
The patent applies ultrasonic vibration to the grinding cup at frequencies between 20-100 kHz, creating high-frequency oscillations that enhance material removal rates while allowing the main spindle to operate at lower speeds. This reduces the harmful vibrations and noise associated with conventional high-speed grinding while maintaining or improving grinding efficiency.
2Ease of operation
If conventional grinding machines are used, then grinding function is provided, but large compressors are required for pneumatic systems
Solution Approach 1:
The patent replaces the conventional pneumatic system with a large compressor with an electric motor-driven ultrasonic generator. This substitution eliminates the need for large compressors while providing the necessary grinding function through electromagnetic field conversion to mechanical vibration.
3Productivity
If conventional grinding machines are used, then grinding is performed, but grinding times per button are long
Solution Approach 1:
The ultrasonic vibration applied to the grinding cup creates micro-impacts that significantly accelerate the material removal process. This reduces grinding times from several minutes to seconds per button, dramatically improving productivity while maintaining precise dimensional control.
Solution Approach 2:
The ultrasonic generator produces periodic high-frequency vibrations that create repeated micro-fractures and material removal events. This periodic action at 20-100 kHz frequencies enables rapid stock removal while maintaining surface integrity, reducing overall grinding time.
4Productivity
If conventional grinding cups are used, then grinding is performed, but wear occurs reducing cup life
Solution Approach 1:
The ultrasonic vibration reduces direct contact pressure and thermal loading between the grinding cup and workpiece. This minimizes wear mechanisms while maintaining effective material removal, significantly extending grinding cup life compared to conventional continuous contact grinding.
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
This solution enhances operational stability, reduces wear, and improves efficiency by allowing precise control of grinding parameters, while also providing valuable data for managing the performance and life of grinding cups and machines.
Implementation Method 1
In a further embodiment the grinding cup is provided with an ultrasonic generator producing high frequency vibrations (20-100 kHz)
Implementation Method 2
Water and/or air, optionally with some form of cutting oil, is provided to the grinding surface to flush and cool the surface of the button during grinding
Data Source
AI summary
A grinding apparatus for grinding working tips of hard metal inserts of rock drill bits, including a grinding machine, means for holding a rock drill bit to be ground and a support system. The grinding apparatus is equipped with a spindle assembly having an output drive shaft. One of a plurality of grinding tool cups is detachably connected to the output drive shaft for grinding the working tips. The grinding apparatus further includes a control system having a programmable operator control panel capable of monitoring and adjusting one or more operational parameters An RFID reader is provided within operator control panel such that when the free end of a grinding cup equipped with an RFID tag is inserted into the RFID reader a proximity sensor detects and scans the RFID tag, to obtain data including a specific ID identifier for the particular grinding cup and the number of grinding cycles used.