Single-Press Hot Stamping for Faster Vehicle Part Production
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Solution Overview
Problem
Current hot stamping processes for manufacturing vehicle parts are time-consuming and require multiple machines and steps, including an oven for heating, a separate press for forming, and laser machines for trimming and piercing, leading to increased duration and cost.
Innovation Solution
A process that stamps, trims, and pierces steel in a single transfer press before heating, using induction heating and quenching in the same press to form vehicle parts, eliminating the need for an oven and laser machines, with rapid quenching to reduce cycle time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional hot stamping process is used with separate oven, press, and laser machines, then manufacturing precision is maintained, but productivity is reduced and cycle time is increased
Solution Approach 1:
The patent combines multiple separate machines (oven, press, laser trimming/piercing machines) into a single integrated hot stamping press. The heating zone, forming zone, and trimming/piercing zone are all contained within one press, eliminating the need for separate machines and transfers between them. This merging directly improves productivity by reducing cycle time and eliminates the complexity of coordinating multiple separate devices.
Solution Approach 2:
The hot stamping press is designed to perform multiple functions within a single device: heating the steel blank, forming the part, trimming excess material, and piercing holes. This multi-functionality eliminates the need for separate specialized machines for each operation, thereby improving productivity while managing device complexity through integrated design.
2Duration of action of moving object
If conventional hot stamping process with multiple machines is used, then manufacturing precision is achieved, but duration of process is increased
Solution Approach 1:
The patent performs trimming and piercing operations on the steel blank before heating and forming. By completing these operations while the material is still in its original state and more easily workable, the process reduces the overall cycle time. The preliminary action of trimming and piercing before heating allows these operations to be done more efficiently, and the integrated press maintains precision through controlled sequencing of operations.
Solution Approach 2:
The integrated press enables continuous operation where heating, forming, trimming, and piercing occur in a continuous sequence within a single device. The steel blank moves through different zones of the press in a continuous flow without interruption or transfer to separate machines. This continuity eliminates idle time and transfer time, reducing overall cycle time while maintaining precision through controlled, sequential operations.
3Area of stationary object
If separate laser machines are used for trimming and piercing, then manufacturing precision is maintained, but space requirements and cost increase
Solution Approach 1:
The patent merges the trimming and piercing functions into the hot stamping press itself, eliminating the need for separate laser machines. The trimmer and piercer are integrated components within the press, allowing all operations to occur in one location. This significantly reduces space requirements by consolidating equipment that would otherwise be distributed across multiple separate machines.
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
This process increases productivity by conducting all steps in a single press, reducing cycle time and space requirements, and forming high-quality vehicle parts with austenite and martensite microstructures.
Implementation Method 1
induction heating the stamped steel material in the press
Implementation Method 2
quenching the stamped steel material in the press after the induction heating
Data Source
AI summary
A process for manufacturing a vehicle part from steel material, such as Mn22B5 steel material, using a single transfer press is provided. The process includes stamping, trimming, and piercing the steel material in the transfer press at room temperature, before the steel material is heated. The process then includes induction heating of the stamped steel material in the same press to form austenite in the steel material. After the induction heating, the process includes rapid quenching of the steel material in the same press to form martensite in the steel material. The process does not require an oven to heat the steel material prior to stamping and does not require laser machines for the trimming and piercing. The steel material does not need to be transferred to multiple different locations, which contributes to the improved productivity of the process compared to conventional hot stamping processes.