Adjustable Sander Pad Assembly with Radial Support Fingers
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Solution Overview
Problem
The existing rotary floor sanders require time-consuming and complicated processes to switch between stiff and flexible sander pads for different sanding steps, as the pads need to be manually removed and replaced.
Innovation Solution
An adjustable sander pad assembly with a backer flange, support fingers, adjustment supports, and an adjustment ring that allows for quick and easy adjustment between rigid and flexible positions by rotating the adjustment ring to extend or retract the support fingers and adjustment supports, enabling the same tool to achieve varying levels of stiffness without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rigid sander pad is used for aggressive sanding, then material removal efficiency is improved, but the device cannot perform fine detail sanding
Solution Approach 1:
The sander pad assembly incorporates support fingers that can dynamically change their rigidity state between extended and retracted positions. When extended, they provide rigid support for aggressive sanding; when retracted, they allow the pad to flex for fine detail work. This dynamic adjustment mechanism resolves the contradiction by enabling the same pad to adapt its mechanical properties based on operational requirements.
Solution Approach 2:
The system changes the physical parameter of pad rigidity through mechanical adjustment of the support fingers. By altering the position of support fingers relative to the pad, the effective stiffness of the assembly is modified without changing the pad material itself, allowing transition between aggressive and fine sanding modes.
2Adaptability or versatility
If the sander pad is made more flexible for fine detail sanding, then adaptability is improved, but material removal efficiency decreases
Solution Approach 1:
The support fingers provide dynamic rigidity control, allowing the operator to switch between flexible and rigid states as needed. This eliminates the need to choose between pad types and enables optimal performance for each sanding phase using the same hardware.
3Manufacturing precision
If different sander pads are used for different sanding steps, then sanding quality is improved, but the process becomes time-consuming and complicated
Solution Approach 1:
The sander pad assembly is designed as a universal system that can perform multiple sanding functions (aggressive removal and fine detailing) through a single adjustable mechanism. The support fingers can be repositioned to provide different rigidity levels, eliminating the need for multiple specialized pads and the time-consuming process of swapping between them.
Solution Approach 2:
The ability to dynamically adjust support finger position allows one pad assembly to replace multiple static pads, reducing tooling changes and associated time losses while maintaining the quality benefits of having different pad characteristics available.
4Productivity
If the sander pad is made rigid for aggressive sanding, then productivity is improved, but ease of operation for fine details worsens
Solution Approach 1:
The adjustable support fingers enable the operator to optimize the pad characteristics for each specific task. For fast material removal, the fingers are extended to maximize rigidity and sanding speed. For fine detail work, the fingers are retracted to allow pad flexibility, improving control and ease of operation on intricate surfaces.
Data Source
AI summary
An adjustable sander pad assembly comprising a backer flange, multiple support fingers, multiple adjustment supports, a sander plate, and an adjustment ring; wherein the multiple support fingers each has a first and a second attachment point, wherein the first attachment point is attached to the adjustment support, wherein the second attachment point is attached to the adjustment ring, wherein the support fingers, the adjustment supports, the sander plate, and the adjustment ring are mounted on the backer flange, and wherein the adjustment ring is rotated to move the support fingers and adjustment supports radially from a retracted position to an extended position.