Vehicle Door Frame Anti-Corrosion Sealer Design
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Solution Overview
Problem
Vehicle door frames with three-stage superimposed steel plate layers face corrosion issues due to inadequate sealing, leading to high costs and reduced economic efficiency when using sealers or high-corrosion resistant steel plates.
Innovation Solution
A door frame design incorporating a sealer between steel plate layers and a curved portion to prevent sealer exposure, applied during the roll forming process to ensure effective sealing and subsequent electrodeposition coating, maintaining anti-corrosive performance while preserving external appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealer is applied outside the superimposed portion to prevent corrosion, then anti-corrosive performance is improved, but manufacturing cost increases
Solution Approach 1:
The curved portion is formed during the roll forming process before final assembly, creating a built-in seal retention structure that prevents sealer exposure without requiring additional manufacturing steps or expensive materials
Solution Approach 2:
The door frame structure itself, through the curved portion, provides the sealing function by containing the sealer within the superimposed portion, eliminating the need for separate sealing components or high-cost corrosion-resistant steel plates
2Reliability
If deviation plating steel plate is used as high corrosion resistant steel plate, then anti-corrosive performance is improved, but manufacturing cost increases excessively
Solution Approach 1:
The patent uses ordinary steel plates combined with a simple curved portion structure and sealer application, replacing expensive deviation plating steel plates with a cost-effective alternative that achieves the same protective function
Solution Approach 2:
The solution combines ordinary steel plates with a sealer material in a composite structure, where the curved portion contains the sealer between steel layers, creating a corrosion-resistant system without using expensive corrosion-resistant steel alloys
3Reliability
If electrodeposition coating is performed after roll forming, then anti-corrosive performance is improved, but the coating does not flow into the three-stage superimposed portion effectively
Solution Approach 1:
The curved portion is formed during roll forming before electrodeposition, creating a pre-configured structure that guides and contains the electrodeposition coating liquid, ensuring it flows into and covers the superimposed portion effectively
Solution Approach 2:
The curved portion acts as an intermediary structure that facilitates the flow and distribution of electrodeposition coating liquid into the superimposed portion, ensuring uniform and complete coating coverage
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 solution effectively prevents sealer exposure and enhances anti-corrosive performance of vehicle door frames, reducing costs and maintaining external quality by ensuring the sealer is compressed and coated within the frame structure.
Implementation Method 1
a roll forming process for manufacturing the door frame for a vehicle
Implementation Method 2
electrodeposition coating is performed after completion of a roll forming process
Data Source
AI summary
A door frame for a vehicle having improved anti-corrosive performance, and a method of manufacturing the door frame may includes: a three-stage superimposed portion which has a structure in which an upper steel plate layer, an intermediate steel plate layer, and a lower steel plate layer are superimposed, and in which a sealer for anti-corrosive performance is applied between the upper steel plate layer and the intermediate steel plate layer; and a curved portion which is formed at an upper side of the intermediate steel plate layer at a first end of the three-stage superimposed portion to prevent the applied sealer from being exposed to the outside, thereby improving anti-corrosive performance, and a method of manufacturing the door frame.