Mechanical Scraping Device for Zinc Coating Removal
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Solution Overview
Problem
Existing methods for removing zinc coatings from metal plates, such as strip galvanizing, are costly and generate toxic fumes, and fail to efficiently handle complex contours and large areas.
Innovation Solution
A device comprising a die and punch with a protruding blade and a roller, allowing for relative movement and compression to remove coatings efficiently, capable of handling various contours and sizes, and includes a suction system to manage waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser beam is used to remove material, then coating removal effectiveness is improved, but equipment cost and toxic fume production increase
Solution Approach 1:
The patent replaces the laser beam (optical/thermal system) with a mechanical scraping system consisting of a die with protruding blade and a punch with roller. The mechanical scraping action effectively removes the zinc coating without the high equipment costs and toxic fume generation associated with laser technology, while maintaining coating removal effectiveness.
2Device complexity
If mechanical scraping is used to remove coating, then equipment cost is reduced, but ability to handle complex contours and large areas is limited
Solution Approach 1:
The patent employs dynamic elements including the roller that can rotate and adapt to the workpiece surface, and the coordinated motion between the die and punch that allows the scraping system to follow complex contours. This dynamic capability enables the simple mechanical system to handle varied geometries and large areas effectively.
Solution Approach 2:
The scraping device with its adjustable die and punch configuration can perform multiple functions: removing coating from flat surfaces, following curved contours, and adapting to different workpiece sizes. This universal applicability allows a single mechanical system to replace multiple specialized tools.
3Loss of substance
If zinc coating is removed by vaporization, then coating is completely removed, but toxic fumes are generated
Solution Approach 1:
The patent converts the potentially harmful vaporization process into a beneficial mechanical scraping process. Instead of vaporizing the zinc coating and generating toxic fumes, the mechanical blade scrapes the coating off as solid particles, which can be contained and managed. The harmful thermal process is replaced with a cold mechanical process that eliminates fume generation while achieving complete coating removal.
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
Enables efficient removal of zinc coatings with minimal environmental impact, allowing for reliable welding processes without the need for costly laser technology, and low investment costs.
Implementation Method 1
A punch (2) carries a roller (5) that rolls on the surface of the metal plate (3) opposite the blade (6)
Implementation Method 2
A pressure device for pressing the die and the punch together
Implementation Method 3
the cutting edge of which points in the opposite direction of movement of the metal plate... a strip of material equal to the width of the blade is removed from the coating
Data Source
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AI summary
The invention relates to a device for partially removing the coating of a metal plate, having the following features: - a die and a punch which together form a gap through which the metal plate is fed; - a drive for generating a movement of the die and the punch relative to the metal plate; wherein - the die has a protruding blade on the die surface facing the metal plate, the cutting edge of said blade pointing in the direction opposite to the movement direction of the metal plate; and - a pressing device for pressing together the die and the punch; - said punch having a roller which rolls on the metal plate surface opposite the blade.