Grinding Disc Edge Abrasive Design for Handlebar Tool Control
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Solution Overview
Problem
Conventional grinding discs are difficult to guide in grinding machines with a handle bar, particularly ceiling and wall grinding machines, due to the large distance between the grip area and the working surface, leading to challenging force conditions for the operator.
Innovation Solution
The grinding disc design features a higher peripheral speed at the edge area with increased contact pressure, where the abrasive is primarily active, and a central area with reduced or no contact to minimize forces on the tool holder, allowing for smoother operation and easier handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the grinding disc has a large diameter to cover a larger working area, then the peripheral speed increases and material removal rate improves, but the distance between the grip area and working surface increases making the tool difficult to control
Solution Approach 1:
The grinding disc is designed with non-uniform abrasive distribution where the edge region has higher abrasive concentration and the central region has reduced or no abrasive. This local differentiation allows the edge to perform effective grinding while the center acts as a counterweight that reduces moments and improves handling without sacrificing overall productivity
2Area of stationary object
If the abrasive is distributed uniformly across the entire grinding surface, then the working area is maximized, but forces are transmitted from the central area to the tool holder creating difficult handling conditions
Solution Approach 1:
The harmful abrasive action is extracted from the central region of the grinding disc, leaving only the edge region with active abrasive. This removal of central abrasive eliminates the transmission of forces from the center to the tool holder, while the edge region maintains sufficient working area for effective grinding operations
3Productivity
If the grinding disc contacts the workpiece over the entire surface, then maximum abrasive performance is achieved, but the central area transmits forces to the handle making the tool difficult to guide
Solution Approach 1:
The grinding disc features localized abrasive performance concentrated at the edge region where it contacts the workpiece, while the central region has reduced or no abrasive contact. This creates a local quality distribution where the edge provides high abrasive performance and the center provides force balancing, resolving the contradiction between productivity and guidability
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 design enables the grinding disc to be guided smoothly and evenly over the workpiece surface, reducing operator strain and improving machining efficiency by concentrating abrasive action at the edge while minimizing central area interaction.
Implementation Method 1
the abrasive for machining the workpiece... with which the workpiece can be abraded
Implementation Method 2
the abrasive in the central area is either not in contact with the workpiece or only in light, frictional contact
Data Source
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AI summary
The invention relates to a grinding disc (10, 110, 210) for a grinding machine (90), wherein the grinding disc has a machine side (11) associated with the grinding machine (90) and a processing surface (12, 112, 212) associated with a processing of a work piece (V), wherein a tool holder retaining means (15) for securing to a tool holder (92) of the grinding machine (90) is arranged on the machine side (11), and a grinding means (50) for processing a work piece (V) or retaining means (33) for detachably retaining a grinding means (50) of this type are arranged on the processing surface (12, 112, 212). According to the invention, the processing surface (12, 112, 212) of the grinding disc (10, 110, 210) has a ring-shaped edge region (44, 144, 244) for forming a flat contact surface of the grinding means (50) on the work piece (V), and a central region (45, 145, 245) surrounded by the ring-shaped edge region (44, 144, 244), wherein the ring-shaped edge region (44, 144, 244) projects in front of the central region (45, 145, 245) towards the work piece (V) and/or wherein the grinding disc (10, 110, 210) has a smaller bulk modulus in the central region (45, 145, 245) than in the edge region (44, 144, 244), such that, when a contact pressure (P) is applied to the tool holder retaining means (15) in the direction of the processing surface (12, 112, 212), substantially the edge region (44, 144, 244) is loaded in the direction of the work piece (V), or same is in contact with the work piece (V), for abrasive processing of the work piece (V).