Multi-Sensor Hot Forming Control for Stable Aluminum Stamping
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Solution Overview
Problem
Existing aluminum alloy hot stamping production lines lack sensors to collect real-time parameters during the hot stamping process, leading to poor process stability and high rejection rates due to inadequate control over temperature, stamping rate, and other critical factors.
Innovation Solution
A multi-sensor-based hot forming production system is introduced, which includes a control system based on a multi-physical quantity model, environmental heating furnaces, automated transfer and positioning devices, hot stamping and forming devices, and in-die aging devices. This system employs a variety of sensors to collect real-time data on temperature, displacement, speed, and pressure, enabling closed-loop control and adaptive production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If hot stamping-quenching integrated process is used to achieve high forming precision, then forming precision is improved, but production cycle increases due to long aging time
Solution Approach 1:
The patent applies preliminary action by performing stress relaxation treatment before the main forming process. The aluminum alloy sheet is heated to 100-200℃ and held for 5-30 minutes to relax internal stresses and reduce springback tendency before hot stamping, which improves final forming precision without requiring extended aging time afterward
Solution Approach 2:
The patent changes temperature parameters dynamically during the process. The sheet temperature is controlled at 100-200℃ for stress relaxation, then increased to 300-500℃ for hot stamping, and finally rapidly cooled. This parameter optimization reduces the time needed for subsequent aging treatment
2Speed
If cold die quenching is used to achieve rapid cooling, then cooling speed is improved, but springback increases due to severe thermal stress
Solution Approach 1:
The patent applies preliminary stress relaxation treatment by heating the aluminum alloy sheet to 100-200℃ and holding it for 5-30 minutes before hot stamping. This preliminary heating relaxes internal stresses and reduces the material's susceptibility to springback during subsequent rapid cooling
Solution Approach 2:
The patent uses beforehand cushioning by introducing a intermediate temperature stage (100-200℃) before the main hot stamping process. This intermediate stage acts as a buffer that prepares the material for rapid cooling by reducing thermal gradients and internal stresses, thereby cushioning against springback
3Adaptability or versatility
If multiple separate devices are used for solution treatment, hot stamping, and aging, then process flexibility is improved, but system complexity increases
Solution Approach 1:
The patent merges the hot stamping device and aging device into a single integrated unit. The hot stamping press includes both the forming capability and the aging chamber, allowing continuous processing without transferring the workpiece between separate devices, thereby reducing system complexity while maintaining process flexibility
Solution Approach 2:
The hot stamping device is designed with multi-functionality, serving both as a forming press and an aging treatment chamber. This universal device can perform hot stamping, in-die quenching, and post-forming aging treatment, eliminating the need for separate dedicated devices for each process step
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 system achieves high stability and yield in aluminum alloy product formation by ensuring precise control over the hot forming process, reducing rejection rates, and improving the precision and mechanical properties of the final products.
Implementation Method 1
a heating furnace is configured to heat the aluminum alloy slab to a desired temperature
Implementation Method 2
The heating furnace is configured to heat the aluminum alloy slab to a desired temperature
Implementation Method 3
the billet is quickly transferred to a cold die, which is rapidly closed to simultaneously achieve hot stamping and forming
Implementation Method 4
the billet is quickly transferred to a cold die, which is rapidly closed to simultaneously achieve hot stamping and forming and quenching thermal treatment of the workpiece
Implementation Method 5
A plurality of first temperature sensors in the heating furnace are configured to collect temperature information of the billet at different positions
Data Source
AI summary
The present disclosure discloses a multi-sensor-based hot forming production system for an aluminum alloy sheet metal part and a control method thereof, and belongs to the field of aluminum alloy sheet metal forming manufacturing technology. A plurality of sensors are disposed in the hot forming production system, and closed-loop control of a whole process and adaptive production can be realized based on deformation properties, a microstructure evolution law, and a mechanical property change law of the aluminum alloy sheet metal part. The hot forming production system comprises a control system based on a multi-physical quantity model, an environmental heating furnace, an automated transfer and positioning device, a hot stamping and forming device, and an in-die aging device. By using the hot forming production system and the control method thereof, the product quality and the stability of the forming process can be effectively improved, and the adaptability of the process to form different types of alloys can be enhanced.