Height-Offset Support for Multi-Piece Centreless Grinding
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Solution Overview
Problem
Simultaneous centreless cylindrical grinding of multiple workpieces often results in variable roundness and precision due to inconsistent bearing angles against the regulating wheel during plunge grinding, leading to inconsistent quality in multiple production processes.
Innovation Solution
The method involves arranging workpieces with a height offset relative to each other, corresponding to at least a quarter of the angle of inclination of the regulating wheel's axis of rotation, to ensure consistent bearing angles against the regulating wheel, and using a height-adjustable support apparatus to maintain precise positioning and dressing of the grinding and regulating wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple workpieces are arranged in a line on the support apparatus for simultaneous plunge grinding, then productivity is improved through multiple production, but manufacturing precision deteriorates due to variable bearing angles and inconsistent roundness
Solution Approach 1:
The support apparatus is designed with individually height-adjustable support points that can be independently positioned to provide optimal local support for each workpiece. This allows each workpiece to be supported at its specific required height to achieve the correct bearing angle, while other support points can be adjusted independently to suit their respective workpieces, thereby maintaining consistent roundness across multiple workpieces ground simultaneously
Solution Approach 2:
The support apparatus incorporates height-adjustable support points that can be dynamically positioned during setup and potentially during operation. This dynamic adjustability allows the system to adapt to different workpiece configurations and maintain optimal bearing angles for each workpiece, ensuring consistent manufacturing precision while processing multiple workpieces in parallel
2Measurement precision
If the regulating wheel axis is inclined for plunge grinding to press workpieces against limit stops, then axial positioning is improved, but bearing angle consistency deteriorates leading to variable roundness
Solution Approach 1:
The support apparatus provides localized height adjustment at each support point to compensate for the regulating wheel inclination. Each support point can be independently positioned to ensure that workpieces at different locations achieve the correct bearing angle despite the inclined regulating wheel axis, thereby maintaining bearing angle consistency across all workpieces while preserving the axial positioning benefit of the inclined regulating wheel
Solution Approach 2:
The system changes the height parameter of individual support points to compensate for the fixed inclination angle of the regulating wheel. By adjusting the vertical position of each support point, the system maintains the correct bearing angle for each workpiece while allowing the regulating wheel to maintain its inclined configuration for effective axial positioning and thrust generation
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 achieves consistent and optimal roundness of workpieces by ensuring uniform bearing angles, enhancing the precision and quality of simultaneous grinding in a single cycle, thereby improving the overall precision and concentricity of the grinding process.
Implementation Method 1
the workpiece is driven by the slowly rotating regulating wheel and machined by the grinding wheel
Implementation Method 2
The grinding and regulating wheels rotate in the same direction but at different speeds. During the grinding process, the workpiece is driven by the slowly rotating regulating wheel
Data Source
AI summary
A method and device for simultaneous centerless cylindrical grinding of multiple workpieces (11, 12, 13, 14), at least sections of which are rotationally symmetrical, the workpieces are arranged on a support apparatus (200) one behind the other between at least one grinding wheel (110) and at least one regulating wheel (120), and wherein the axis of rotation of the regulating wheel is inclined with respect to a horizontal plane extending parallel to the workpiece axes of rotation and the grinding wheel axis of rotation by an inclination angle (α). During grinding the workpieces are arranged with a height offset relative to each other corresponding to at least a quarter of the inclination angle (α) of the axis of rotation of the regulating wheel with respect to the parallel plane to render the respective bearing angles (γ) of the workpieces on the inclined regulating wheel consistent.