Automated Vehicle-Component Sanding With Constant-Pressure Control
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Solution Overview
Problem
Current methods for sanding vehicle component surfaces, whether manual or robotic, fail to achieve a class A auto high sheen surface finish efficiently, are time-consuming, and require additional costly preparation steps, including the use of additives like LPAs, and often introduce further irregularities.
Innovation Solution
An automated sanding process using a sanding mechanism with a gimbal-mounted pressure sensor and air logic controller maintains constant pressure, allowing a sanding disk to conform to surface contours and achieve a class A finish without additives, reducing sanding time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual sanding is performed by human technicians, then the process is simple and flexible, but constant pressure cannot be maintained leading to surface irregularities and increased preparation time
Solution Approach 1:
The patent replaces manual sanding operations with an automated robotic sanding system that uses sensors and control systems to maintain constant pressure on the sanding mechanism, eliminating the pressure variability inherent in manual sanding and achieving uniform surface finish without increasing preparation time
Solution Approach 2:
The patent incorporates pressure sensors that continuously monitor the force applied by the sanding mechanism and provide feedback to a control system, which automatically adjusts the sanding pressure to maintain constant contact force on the vehicle component surface, ensuring uniform material removal and surface finish
2Extent of automation
If robotic sanding mechanisms are used, then automation is improved, but sanding time is not significantly reduced and class A finish is not achieved
Solution Approach 1:
The patent employs a dynamically adjustable robotic sanding system where the sanding mechanism can automatically adapt its position, pressure, and motion path in real-time based on surface topography feedback, enabling both high automation and efficient material removal to achieve class A finish within reduced timeframes
Solution Approach 2:
The patent utilizes programmable control systems that can dynamically change sanding parameters such as speed, pressure, orbital diameter, and pass patterns optimized for different surface conditions and material types, maximizing productivity while maintaining automation and achieving class A surface finish
3Manufacturing precision
If additives like LPAs are added to SMC formulations, then surface finish is improved, but manufacturing costs increase
Solution Approach 1:
The patent converts the inherent surface imperfections from SMC molding (caused by fiber and filler alignment issues) into a controlled sanding process where automated pressure control and adaptive motion transform the rough molded surface into a uniform class A finish, eliminating the need for costly LPAs while improving surface quality
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
The process achieves a uniform class A auto high sheen surface finish in less time than current methods, improving paint adhesion and eliminating the need for additives, thus reducing costs and time.
Implementation Method 1
a sanding disk is movably applied with constant maintained pressure to a thermoplastic or SMC vehicle component surface
Data Source
Figure 1~2
AI summary
A process for automated sanding of a vehicle component surface is provided and includes providing a sanding mechanism having a sanding head engaged with a housing, a rotary motor contained within the housing, the rotary motor having a drive shaft rotatable about an axis and extending outwardly therefrom, a radial plate attached to a first end of the drive shaft, and a sanding disk having an abrasive surface releasably attached to the radial plate; attaching the sanding head to a gimbal having a pressure sensor; powering the rotary motor driving rotation of the drive shaft, the radial plate and the sanding disk in at least one of a clockwise or counterclockwise direction; movably applying the sanding disk to the surface at a maintained constant pressure; and achieving a desired finish on the surface prepared to be primed and painted to a class A auto high sheen surface finish.