Eccentric Disc Sanders for Uniform Workpiece Grinding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing through-feed grinding machines using disc sanders struggle to cover the entire width of flat workpieces efficiently due to the need for multiple sanders arranged at a distance, leading to unsatisfactory grinding results and high costs, as well as potential damage from centrifugal force and inhomogeneous sanding patterns.
Innovation Solution
A through-feed grinding machine design where adjacent disc sanders are attached eccentrically to their spindles, allowing their cutting circles to overlap and be driven by a single motor, eliminating the need for oscillating movements and additional rows, and incorporating an additional staggered row of grinding tools for comprehensive coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple disc sanders are arranged close together, then the workpiece can be ground more comprehensively, but the abrasive flaps collide and damage each other due to centrifugal force
Solution Approach 1:
The disc sanders are mounted on an oscillating mechanism that moves them transversely during operation. This dynamic positioning allows the sanders to cover a wider area without requiring permanent close spacing, preventing abrasive flap collision while maintaining comprehensive grinding coverage.
Solution Approach 2:
The invention adds a transverse oscillation dimension to the traditional linear arrangement of disc sanders. By oscillating the sanders back and forth perpendicular to the feed direction, the system achieves broader coverage without increasing the number of sanders or reducing spacing, thus avoiding centrifugal force conflicts.
2Manufacturing precision
If disc sanders are arranged in two rows or with oscillating movement, then the workpiece surface is better covered, but the device becomes very expensive and complex
Solution Approach 1:
A single oscillating mechanism serves multiple functions: it positions all disc sanders simultaneously, creates the sanding pattern, and replaces the need for multiple independent positioning systems. This multi-functionality reduces overall device complexity while achieving uniform sanding coverage.
Solution Approach 2:
The invention combines multiple disc sanders into a single oscillating assembly rather than using separate mounting mechanisms for each sander. This merging of functions reduces the number of individual components and simplifies the overall structure while maintaining comprehensive surface coverage.
3Area of stationary object
If oscillating movement is used to improve coverage, then the grinding result suffers because the relative speed approaches zero in the oscillation area
Solution Approach 1:
The oscillating mechanism performs periodic back-and-forth movements that continuously bring fresh abrasive flaps into contact with the workpiece surface. This periodic action ensures that even though the oscillation speed is low, the continuous renewal of abrasive contact maintains grinding quality while expanding processed area.
Solution Approach 2:
The system uses controlled oscillation dynamics where the amplitude and frequency are optimized to maintain sufficient relative speed between abrasive and workpiece. The oscillating motion creates dynamic grinding paths that cover more area without reducing grinding effectiveness, as the motion is designed to maintain productive contact speeds.
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 ensures uniform grinding over the entire width of the workpiece with improved results and reduced manufacturing costs, avoiding collisions and ensuring every area is ground with consistent intensity.
Implementation Method 1
disc sanders (20) attached eccentrically to said spindles (18) and with said spindles (18) and disc sanders (20) rotating around a vertical axis (24)
Implementation Method 2
disc sanders (20) attached eccentrically to said spindles (18)... by attaching the disk sander off-center on the spindle, the circle of motion of the disk sander can be enlarged
Implementation Method 3
adjacent grinding tools are driven by a belt, in particular a toothed belt
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The grinding machine has at least two rotating grinding tool is, rotating about a vertical axis (24), a spindle (18) rotating round the same axis, and the plate grinder (20) on the spindle. The grinding tools are arranged in a row transversely to the feed direction of the workpiece (10, 12). At least one plate grinder is fitted eccentrically to its spindle.