Socket Marking via Indentation and Electroplating Contrast
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Solution Overview
Problem
Existing methods for marking sockets on socket wrenches, such as using plastic collars, indented marks, manganese phosphate, or black dye, fail to provide clear and durable markings due to blurring, damage, or lack of contrast, especially when coated or exposed to dirt and grease.
Innovation Solution
A method involving pressing to create an indented mark, followed by thermal treatment to increase hardness, coloring to form a printed layer, vibrating and grinding to remove excess color, and electroplating to create a coating that leaves the mark in strong contrast, ensuring the mark remains clear and durable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If plastic collars of different colors are provided on sockets of different sizes, then the sockets are marked with color codes, but the plastic collars can be blurred, damaged or detached from the sockets
Solution Approach 1:
The patent replaces the mechanical plastic collar system with a direct surface coloring system applied to the socket metal itself. The coloring layer is applied directly to the socket surface and then selectively removed by grinding in the indented mark areas, creating a permanent marking that cannot detach or blur like plastic collars.
Solution Approach 2:
The patent employs electroplating to deposit a metallic coating layer on the socket surface, followed by selective removal through mechanical grinding. This phase transition from coating application to selective removal creates a durable contrast marking that is integral to the socket structure.
2Loss of information
If indented marks are made in the sockets by pressing, then the sockets are marked with size indicators, but the indented marks are unclear on the sockets especially when filled with dirt and grease
Solution Approach 1:
The patent applies a coloring layer to the socket surface and selectively removes it from the indented mark areas through grinding. This creates a high-contrast visual marking where the colored areas indicate socket size, providing clear visibility that is not obscured by dirt or grease accumulation.
3Reliability
If a coating is provided on the socket by electroplating, then the socket is protected from rust, but the color of the socket within the indented mark is identical to the color outside making marks unclear
Solution Approach 1:
The patent applies the coloring layer uniformly across the socket surface, then selectively removes it only from the indented mark areas through grinding. This creates local differentiation where the marking areas have different visual properties (exposed metal) compared to the surrounding areas (colored surface), providing clear contrast while maintaining uniform rust protection through the electroplating coating.
4Loss of information
If black dye is provided on the socket near the indented mark to form a black mark, then the indented mark is filled with black dye, but the contrast of the black mark against the socket is not sharp and black is sometimes undesired for a trademark
Solution Approach 1:
The patent uses a multi-color system with colored powder applied to the socket surface, then selectively removed from indented mark areas. This creates sharp contrast markings in the exposed metal areas, providing clear visibility and allowing for trademark colors other than black, thereby improving both marking clarity and manufacturing precision.
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 method results in a clear, colorful, and durable mark that maintains contrast with the coating, preventing wear and ensuring the socket size is always obvious, even after exposure to dirt and grease.
Implementation Method 1
executing thermal treatment on the socket to increase hardness of the socket
Implementation Method 2
electroplating the socket to form a coating on an external side and an internal side of the socket
Data Source
AI summary
A method is disclosed for marking a socket. The method includes the steps of providing a socket, pressing the socket to make an indented mark, executing thermal treatment on the socket, coloring a portion of the socket near the indented mark to form a printed layer, vibrating and grinding the socket to remove the printed layer from the socket except the indented mark, and electroplating the socket to form a coating on an external side and an internal side of the socket.