Variable Die Cam Adjustment for Springback Compensation
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Solution Overview
Problem
In the automobile industry, predicting and correcting springback in material bending processing is challenging due to variations in material properties and internal stresses, leading to inefficiencies and defective products, especially with high-strength coiled steel sheets.
Innovation Solution
A variable die and pressing apparatus are designed with an upper and lower die portion, including cams and actuators that allow for adjustable molding conditions to correct springback errors by moving and rotating a cam block in response to material variations, enabling precise shaping despite varying springback degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a separate die is manufactured for each material property to compensate for springback, then springback correction precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The die is designed with movable and adjustable components including a movable die portion that can shift in the vertical direction, and adjustable die portions that can be repositioned horizontally. This dynamic structure allows a single die to adapt to different material properties and springback characteristics, eliminating the need for multiple fixed dies for different materials.
Solution Approach 2:
The die structure incorporates adjustable parameters such as the position of the movable die portion, the angle and position of adjustable die portions, and the depth of groove formation. These parameters can be modified based on material properties and springback measurements, enabling one die to compensate for springback across various material types rather than requiring dedicated dies for each material.
2Device complexity
If the die structure is made fixed and simple, then device complexity is reduced, but adaptability to different material properties and springback conditions deteriorates
Solution Approach 1:
The die incorporates a movable die portion that can dynamically adjust its position in the vertical direction, and adjustable die portions that can be repositioned. This dynamic capability allows the relatively simple die structure to adapt to different material properties and springback conditions without requiring complex multi-component systems.
Solution Approach 2:
The die is designed as a universal tool that can handle multiple material types and springback conditions through its movable and adjustable components. A single die structure performs multiple functions by adjusting its configuration, rather than requiring separate specialized dies for each material or condition.
3Productivity
If molding conditions are fixed, then processing efficiency is improved, but ability to correct springback variations deteriorates
Solution Approach 1:
The die structure enables dynamic adjustment of molding conditions during the process. The movable die portion can be repositioned vertically, and adjustable die portions can be moved horizontally based on springback measurements, allowing the system to maintain both efficiency and precision by making targeted adjustments rather than requiring complete re-molding.
Solution Approach 2:
The system incorporates a feedback mechanism where springback is measured after initial molding, and the die parameters are adjusted based on this measurement. The movable and adjustable die portions respond to the measured springback conditions, enabling correction while maintaining processing efficiency through targeted, measurement-based adjustments.
Data Source
AI summary
The present invention provides a variable die comprising an upper part and a lower part. The upper part comprises an upper cam. The lower part comprises: a lower body; a mounting portion connected to the lower body and having an object to be formed mounted thereon; and a forming portion connected to the lower body, disposed on one side of the mounting portion, and comprising a lower cam corresponding to the upper cam to linearly move in a first direction toward the mounting portion by means of the upper cam and the lower cam. The forming portion comprises: a lower cam; a base plate having the lower cam connected thereto, and formed to be movable in the first direction; actuators having one part fixed to the base plate; and a cam block connected to the actuators.