Replaceable Evaluation Dies for Quantifying Press-Forming Damage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for evaluating die damage in press-forming are insufficient for quantitatively assessing die life during mass production, as they are limited to a few hundred press-forming cycles, failing to account for the thousands to tens of thousands of cycles encountered in actual production, and do not provide effective criteria for selecting die steel materials and coating treatments.
Innovation Solution
A damage evaluation device and method that includes evaluation dies with replaceable die steel materials and surface coatings, capable of forming and shearing metal components into specific shapes, allowing for observation of damage behavior after repeated press-forming, enabling quantitative evaluation of die damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If existing evaluation methods (sliding test or press-forming test) are used, then die damage can be observed, but the number of press-forming cycles is limited to several tens to several hundred times, which is insufficient for evaluating die damages occurring in several thousands to several tens of thousands of times of actual mass production press-forming
Solution Approach 1:
The evaluation die is divided into multiple replaceable die sections (first die, second die, third die) that can be independently replaced. This segmentation allows the evaluation system to simulate extended press-forming cycles by swapping worn dies with fresh ones, thereby achieving cumulative cycle counts that match actual mass production conditions without requiring the entire evaluation system to endure all cycles.
Solution Approach 2:
The invention changes the parameter of die cycle count by implementing a modular die replacement mechanism. Instead of using a single die for all cycles, the system uses multiple dies that are rotated and replaced, allowing the evaluation to cover tens of thousands of cycles while maintaining measurement accuracy throughout the extended duration.
2Adaptability or versatility
If multiple die steel materials and coating treatments are available from various manufacturers, then selection options increase, but it becomes difficult to select which die steel material and coating treatment are effective
Solution Approach 1:
The evaluation die is designed with a universal structure that can accommodate and evaluate multiple different die steel materials and coating treatments. The standardized evaluation platform allows systematic comparison of various materials under identical press-forming conditions, transforming the complexity of material selection into a structured evaluation process that provides clear selection criteria.
Solution Approach 2:
The invention implements a feedback mechanism where the evaluation die provides quantitative data on die damage occurrence for each material and coating combination. This feedback loop enables users to identify which materials perform best under specific conditions, transforming the difficulty of material selection into an evidence-based decision-making process.
3Productivity
If press-forming is continued in a state where the die is damaged, then production continues, but not only the appearance of the press-formed product is impaired, but also the quality of the sheared surface is deteriorated, which may greatly affect the formability in a next press-forming step, hydrogen embrittlement resistance after the product is formed
Solution Approach 1:
The evaluation die enables preliminary detection of die damage before it significantly impacts product quality. By continuously monitoring die condition through the evaluation system, damage can be detected early, allowing for preventive die replacement before the damage propagates to affect product appearance, sheared surface quality, formability, or hydrogen embrittlement resistance.
Data Source
Figure 1
Figure 2(a)~2(c)
Figure 3(a)~3(f)
AI summary
A damage evaluation device for a press-forming die according to the present invention includes: evaluation dies installed in a pressing device for press-forming a metal material; and an observation device that observes damage behavior of a die steel material and surface coating constituting the evaluation dies, in which the evaluation dies include: a perforating unit that forms a hole in the metal material; a first shearing unit that shears the metal material in which the hole is formed into a predetermined metal component shape; and a second shearing unit that separates a metal component from the metal material, and dies of the perforating unit, the first shearing unit, and the second shearing unit are formed of the die steel material and have a structure that enables replacement with another die made of predetermined material and applied with predetermined surface coating treatment.