Grinding Robot with Embedded Conductor Strands for Wear Monitoring
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Solution Overview
Problem
Conventional grinding robots face challenges in achieving accurate grinding results due to difficulty in measuring the position and force of the grinding wheel, and the wear of the grinding wheel during operation, which reduces accuracy and makes it hard to maintain the desired surface contour of electrically conductive workpieces.
Innovation Solution
A grinding robot that controls the grinding process exclusively by measuring electrical values using a grinding wheel with an undulated tool receptacle, a rotationally symmetrical head containing abrasive material, a measuring and transmission unit, and conductor strand pairs that create a closed electrical circuit to measure resistance, allowing for real-time monitoring of wear and adjustment of the grinding process to achieve the desired surface contour.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional grinding robots measure position and force of the grinding wheel, then grinding control is possible, but measurement is difficult in practice and accuracy decreases due to wheel wear
Solution Approach 1:
The patent replaces mechanical measurement methods (position and force sensors) with an electrical measurement system. Conductor strands are embedded in the grinding wheel to create an electrical circuit that measures wear through resistance changes, eliminating the need for complex mechanical sensing of wheel position and force.
Solution Approach 2:
The patent introduces conductor strands as an intermediary element embedded in the grinding wheel. These strands serve as a mediator that translates physical wear into measurable electrical resistance changes, providing an indirect but accurate measurement of wheel condition without direct mechanical sensing.
2Manufacturing precision
If grinding wheel wear is not monitored, then device complexity is reduced, but manufacturing precision deteriorates due to unrecognized wear
Solution Approach 1:
The grinding wheel monitors its own wear condition through embedded conductor strands. The wear measurement system is integrated directly into the wheel structure, allowing the wheel to self-report its condition without requiring external sensors or complex monitoring equipment.
Solution Approach 2:
The patent utilizes changes in electrical resistance as a parameter to indicate grinding wheel wear. As the wheel wears and conductor strands become exposed or their length changes, the resistance changes provide a direct measurement of wear extent, enabling precision control through a simple electrical parameter.
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 enables precise control of the grinding process, allowing the robot to accurately determine when contact is made with the workpiece and continuously monitor wear, ensuring the desired surface contour is achieved within specified tolerances, thereby improving the accuracy and reliability of the grinding results.
Implementation Method 1
a closed electrical circuit is created for measuring a resistance value, wherein the electric circuit progresses from the measuring and transmission unit via one conductor strand, the workpiece, and the other conductor strand back to the measuring and transmission unit
Data Source
AI summary
A grinding robot for grinding an electrically conducting workpiece. The grinding robot includes a grinding wheel, an actuation device for actuating grinding wheel, and a control system. The grinding wheel including an undulated tool receptacle which defines an axis of rotation about which the grinding wheel can rotate during grinding, and a head which is rotationally symmetrical with respect to the axis of rotation, and which contains abrasive material and has a grinding surface which is in contact with workpiece during grinding. The grinding wheel also includes a measuring and transmission unit and at least one conductor strand pair with two conductor strands which are electrically insulated from one another. The conductor strands are embedded in the rotationally symmetrical head and extend from the grinding surface of the head into the interior of the head and are electrically connected with measuring and transmission unit.