Hot Stamping Component Timing Control for Phase and Shape Stability
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Solution Overview
Problem
Existing hot stamping processes lack effective control over heating time, air cooling time, and mold cooling time, which affects the quality and consistency of manufactured components, particularly in consideration of material type and thickness.
Innovation Solution
A method for manufacturing hot stamping components that involves controlling heating, air cooling, and mold cooling times using specific equations and parameters, including step-heating and soaking stages, air cooling at room temperature, and mold cooling with controlled refrigerant circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If heating time, air cooling time, and mold cooling time are not controlled properly, then manufacturing process is simple, but component quality and consistency deteriorate
Solution Approach 1:
The patent applies parameter changes by establishing specific mathematical relationships between heating time, air cooling time, and mold cooling time based on blank thickness and heating temperature. Equation (1) defines heating time as a function of these parameters, while Equation (2) defines air cooling time and Equation (3) defines mold cooling time. By controlling these time parameters within specific ranges, the patent achieves consistent component quality and proper phase transformation without excessive process complexity.
Solution Approach 2:
The patent implements feedback control by using the measured or specified blank thickness and heating temperature as input parameters to calculate the optimal heating time, air cooling time, and mold cooling time. The control unit receives information about material properties and process conditions, then adjusts the time parameters accordingly to maintain quality consistency across different blank specifications.
2Manufacturing precision
If heating temperature and time are increased to ensure proper phase transformation, then microstructure quality improves, but energy consumption increases
Solution Approach 1:
The patent optimizes the balance between heating parameters and energy consumption by establishing Equation (1) that calculates heating time as a function of blank thickness and heating temperature. This equation allows determination of the minimum necessary heating time to achieve proper phase transformation (austenite formation) at any given temperature, avoiding excessive heating that would waste energy. Similarly, Equations (2) and (3) optimize cooling times to ensure proper microstructure development while minimizing total process time and energy consumption.
3Manufacturing precision
If air cooling time is extended to prevent defects, then component quality improves, but manufacturing productivity decreases
Solution Approach 1:
The patent resolves this contradiction by establishing Equation (2) that defines air cooling time as a precise function of heating furnace discharge temperature, atmospheric temperature, blank thickness, and material properties. This equation determines the minimum air cooling time needed to prevent defects such as wrinkles and warpage while avoiding excessive cooling time that would reduce productivity. The control unit uses this calculated time to optimize the air cooling phase efficiently.
Solution Approach 2:
The patent maintains continuity of useful action by seamlessly transitioning between heating, air cooling, and mold cooling phases without unnecessary interruptions. The calculated air cooling time ensures continuous monitoring and control throughout the process, maintaining optimal conditions for defect prevention while keeping the manufacturing flow continuous and efficient.
4Manufacturing precision
If mold cooling time is increased to ensure proper cooling, then component quality improves, but cycle time increases
Solution Approach 1:
The patent optimizes mold cooling time by establishing Equation (3) that defines it as a function of mold cooling medium temperature, blank thickness, and material hardenability. This equation calculates the precise minimum cooling time needed to achieve proper microstructure transformation and component quality while minimizing the cycle time. The control unit adjusts the cooling medium temperature and duration based on these calculations to achieve optimal results.
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
Improves the quality and consistency of hot stamping components by ensuring proper phase transformation and microstructure development, preventing defects like wrinkles and warpage, while allowing for flexible process design and quality control.
Implementation Method 1
A hot stamping process generally includes heating/forming/cooling/trimming, and may utilize a phase transformation and microstructure change of a material during the process
Implementation Method 2
the heated blank may be air-cooled at room temperature
Implementation Method 3
a cooling process is a process of cooling a hot-stamped molded body in a mold
Data Source
AI summary
The present disclosure provides a method of manufacturing a hot stamping component, the method includes inserting a blank into a heating furnace, heating the blank, and transferring the heated blank from the heating furnace to a mold, wherein an air cooling time of the blank in the transferring of the blank satisfies Equation 1.