Centerless Grinding Workpiece Ejection via Fluid Flow
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Solution Overview
Problem
Centerless grinding machines face challenges in efficiently loading and unloading small workpieces due to their design, leading to high workpiece change times and increased operational costs, especially when the ratio of grinding or regulating wheel diameter to workpiece diameter is large, resulting in complex and expensive handling systems and machine downtimes.
Innovation Solution
The method involves using a temporary, directed fluid flow to lift and transport workpieces off the support ruler, with controlled fluid parameters and protective elements to facilitate faster and more precise workpiece handling, reducing the need for complex gantry loaders and minimizing machine downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional gantry loaders or gripping systems are used to load and unload small workpieces, then the workpieces can be handled, but the workpiece change times are long and the systems become complex and expensive
Solution Approach 1:
The patent uses a fluid jet (pneumatic or hydraulic) to rapidly eject workpieces from the grinding zone. A nozzle directs a high-speed fluid stream onto the workpiece, generating sufficient force to overcome friction and quickly remove the workpiece from the support ruler, dramatically reducing workpiece change time compared to mechanical gripping systems
Solution Approach 2:
The patent replaces complex mechanical gantry loaders and gripping systems with a simpler fluid jet ejection system. Instead of using mechanical arms, grippers, and positioning mechanisms, the invention uses a directed fluid stream to accomplish workpiece removal, reducing system complexity while improving speed
2Manufacturing precision
If the ratio of grinding wheel diameter to workpiece diameter is large, then the grinding process can be maintained, but the handling systems become more complex and expensive
Solution Approach 1:
The fluid jet ejection system provides a simple yet effective method to handle workpieces regardless of the grinding wheel to workpiece diameter ratio. By adjusting the fluid pressure, flow rate, and nozzle positioning, the system can efficiently eject various sized workpieces without requiring complex mechanical adjustments or specialized handling mechanisms
Solution Approach 2:
The patent utilizes parameter changes in the fluid jet (pressure, flow rate, duration) to adapt to different workpiece sizes and grinding configurations. This allows the same simple ejection mechanism to handle a wide range of workpiece dimensions without increasing system complexity
3Ease of operation
If complex gantry loaders are used to handle small workpieces, then the workpieces can be transported, but the operational costs increase
Solution Approach 1:
The fluid jet ejection system consumes significantly less energy than complex mechanical gantry loaders. The fluid stream delivers the necessary force for workpiece ejection with minimal energy input, eliminating the need for powerful motors, heavy mechanical structures, and complex control systems that consume substantial energy
4Productivity
If traditional loading/unloading methods are used, then workpieces can be processed, but machine downtimes increase
Solution Approach 1:
The rapid fluid jet ejection dramatically reduces the time required to remove workpieces from the grinding zone, minimizing machine downtime between processing cycles. The system can quickly eject workpieces and prepare for the next loading operation, maintaining higher productivity compared to slower mechanical handling systems
Solution Approach 2:
The fluid jet ejection system enables more continuous operation by rapidly clearing the grinding zone, allowing the next workpiece to be loaded and processed with minimal interruption. This reduces idle time and maintains a more continuous productive action
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 approach significantly shortens workpiece change times, increases operational safety, and reduces the need for delicate adjustments, resulting in higher productivity and lower workpiece damage, while maintaining the precision of the grinding process.
Implementation Method 1
the processed workpieces are lifted off the support ruler and transported away by means of a temporary, directed fluid flow
Data Source
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AI summary
The centerless grinding machine has a loading and unloading device and at least one processing unit, each with a grinding disk (28), a control disk (30) and a supporting straightedge (24) for the workpieces (22). The processed workpieces are lifted and transported away from the supporting straightedge using a temporary, controlled fluid flow. Independent claims are also included for the following: (A) a centerless grinding (B) and a loading/unloading device.