Cylindrical Grinding Dynamic Roughing Switch
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Solution Overview
Problem
The existing cylindrical grinding methods often result in unnecessarily long finish grinding times due to predetermined switching diameters, which do not account for the changing grinding performance and clogging state of the grinding wheel, leading to inefficient processing.
Innovation Solution
A method where the rough-grinding setting value is dynamically adjusted based on the necessary time and total required time for finish grinding, allowing for optimal timing of the switch from rough grinding to finish grinding, thereby reducing the overall grinding time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a predetermined switching diameter is used for transitioning from rough grinding to finish grinding, then the grinding process is simple to control, but the finish grinding time becomes unnecessarily long due to not accounting for grinding wheel performance degradation
Solution Approach 1:
The patent applies dynamics by making the switching diameter variable rather than fixed. The switching diameter is dynamically adjusted based on the number of workpieces ground since the last grinding wheel truing. Immediately after truing, the switching diameter is set to a larger value (D1), and after grinding many workpieces, it is set to a smaller value (D2), allowing the system to adapt to grinding wheel performance changes over time
Solution Approach 2:
The patent implements feedback by using information about the number of workpieces ground since the last truing to determine the appropriate switching diameter. This feedback mechanism allows the control system to adjust the rough grinding termination point based on the actual state of the grinding wheel, preventing unnecessary finish grinding time while maintaining quality standards
2Manufacturing precision
If the switching diameter is set to accommodate grinding wheel degradation after many workpieces, then quality is maintained, but finish grinding is performed for unnecessarily long time in cases where the grinding wheel performance is still good
Solution Approach 1:
The patent makes the switching diameter dynamic based on grinding wheel age. When the grinding wheel is fresh (few workpieces ground since truing), a larger switching diameter D1 is used, allowing rough grinding to proceed longer and reducing finish grinding time. When the grinding wheel is worn (many workpieces ground), a smaller switching diameter D2 is used to ensure quality. This dynamic adjustment resolves the contradiction between maintaining quality and reducing time
Solution Approach 2:
The patent changes the parameter of switching diameter based on the condition of the grinding wheel. By varying this critical parameter according to the number of workpieces ground, the system optimizes the balance between manufacturing precision and time efficiency for each specific grinding wheel state
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 ensures that the finish grinding time is necessary and sufficient, reducing the total grinding time for multiple workpieces by aligning the switching timing with the grinding wheel's performance characteristics.
Implementation Method 1
performing rough grinding until a diameter of the workpiece reaches a rough-grinding setting value, and performing finish grinding subsequently to the rough grinding
Data Source
AI summary
In a cylindrical grinding method, rough grinding is performed until a diameter of a workpiece reaches a rough-grinding setting value, and then, first finish grinding is performed until the diameter of the workpiece reaches a first finish setting value while measuring a shape deviation amount of an outer peripheral surface of the workpiece from a perfect round shape. The rough-grinding setting value in the next-time rough grinding step is changed based on a necessary time of the first finish grinding step to time at which the shape deviation amount reaches a first threshold or smaller in the first finish grinding step, and based on a total required time for the first finish grinding step.