Fiber-Reinforced Drawing Die for Lightweight Dent Correction
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Solution Overview
Problem
Conventional drawing dies for sheet-metal components, particularly in motor vehicles, are heavy, leading to user fatigue and increased risk of damaging the component due to excessive force application, resulting in extended working times and additional costs.
Innovation Solution
A drawing die with a load-bearing structure made from fiber-reinforced plastic, which reduces weight and enhances manageability, incorporating reinforcing fibers like carbon or glass for increased strength and a honeycomb structure for rigidity, along with a moving device and supporting portions designed for optimal force distribution and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the load-bearing structure is made of metal (steel or aluminum), then the drawing die has sufficient strength to absorb forces during working, but the weight increases significantly making handling difficult and causing user fatigue
Solution Approach 1:
The patent applies composite materials by using fiber-reinforced plastic instead of traditional metal for the load-bearing structure. The fiber reinforcement provides the necessary strength to absorb forces during sheet-metal working, while the plastic matrix reduces the overall weight, resolving the contradiction between strength and weight.
Solution Approach 2:
The patent changes the material parameters by transitioning from dense metal to fiber-reinforced plastic composite. This parameter change maintains structural integrity through fiber reinforcement while significantly reducing density and weight, allowing the drawing die to remain strong but lighter for easier handling.
2Reliability
If the drawing die is heavy, then it has sufficient structural integrity, but the user experiences rapid fatigue requiring regular breaks and extending working times
Solution Approach 1:
The fiber-reinforced plastic composite maintains structural integrity comparable to metal while reducing weight, enabling users to handle the drawing die for longer periods without fatigue, thus improving productivity without sacrificing reliability.
Solution Approach 2:
By changing the material parameters to fiber-reinforced plastic, the drawing die achieves an optimal balance between structural integrity and weight, allowing sustained use without user fatigue and extending productive working time.
3Productivity
If the drawing die is placed on the sheet-metal component with great force due to user fatigue, then the depression can be worked, but the sheet-metal component may be damaged or scratched
Solution Approach 1:
The reduced weight of the fiber-reinforced plastic drawing die allows users to maintain better control and apply force more evenly, reducing the risk of excessive force application that could damage the sheet-metal component, while still enabling effective depression working.
Solution Approach 2:
The material parameter change to fiber-reinforced plastic reduces the drawing die's weight, improving user control and reducing harmful excessive force application, thereby preventing damage to the sheet-metal component while maintaining productivity.
4Weight of moving object
If the drawing die weight is reduced for better manageability, then user fatigue decreases, but the strength to absorb forces during working may be compromised
Solution Approach 1:
The fiber-reinforced plastic composite compensates for the weight reduction by incorporating high-strength fibers that provide the necessary force absorption capacity, ensuring that the lighter drawing die can still handle the forces encountered during sheet-metal working operations.
Solution Approach 2:
The patent changes the material composition to fiber-reinforced plastic, where the fiber reinforcement maintains force absorption capacity despite the reduced overall weight, resolving the contradiction between weight reduction and strength maintenance.
Data Source
AI summary
The present invention relates to a drawing die (10) for working depressions(76) of a sheet-metal component (26), in particular of a motor vehicle, comprising a load-bearing structure (12), at least one supporting portion (16), which is fastened or can be fastened on the load-bearing structure (12) and with which the drawing die (10) can be placed on the sheet-metal component (26), characterized by a drawing means (28) which can be connected to the sheet-metal component (26) and is mounted on the load-bearing structure (12), and a moving device (36), which is mounted on the load-bearing structure (12) and by means of which the drawing means (28) can be moved in relation to the sheet-metal component (26), wherein at least the load-bearing structure (12) is formed from a fiber-reinforced plastic (52).