Incremental Sheet Forming Toolpath Control for Springback Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Incremental sheet forming (ISF) is limited by geometric inaccuracy due to in-process springback, which is a major obstacle for its widespread adoption in industry, as existing methods require iterative processes and increased manufacturing times and costs to compensate for material elasticity.
Innovation Solution
A simulation-based in-situ springback compensation system that continuously modifies the toolpath in real-time based on in-situ forming forces and a meta-model predicting springback errors, using a forming tool, force sensor, and processor to calculate and apply in-situ compensation, reducing geometric errors by modifying the toolpath depth based on measured forming forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If iterative processes are used to compensate for material springback, then geometric accuracy is improved, but manufacturing time and cost increase
Solution Approach 1:
The system performs preliminary springback compensation calculations using a meta-model before the actual forming operation. The meta-model predicts springback errors based on process parameters, allowing the toolpath to be pre-adjusted to compensate for expected springback, thereby achieving geometric accuracy without iterative corrections during manufacturing
Solution Approach 2:
The system implements real-time feedback by continuously measuring forming forces with sensors during the incremental sheet forming process. These force measurements are fed back to the control system, which uses the meta-model to calculate springback errors and dynamically adjust the toolpath, enabling closed-loop compensation that improves geometric accuracy while maintaining efficient single-pass production
2Manufacturing precision
If traditional springback compensation methods are used, then geometric errors are reduced, but process complexity and setup cost increase
Solution Approach 1:
The system introduces a meta-model as an intermediary between the physical forming process and the control system. This meta-model, established offline from simplified simulations, translates forming force measurements into springback error predictions, simplifying the real-time compensation process while maintaining high geometric accuracy without requiring complex real-time simulation capabilities
Solution Approach 2:
The system replaces complex mechanical iterative adjustment mechanisms with a computational approach. Instead of physically retrying forming operations or using complex mechanical feedback systems, the invention uses a meta-model-based computational system that calculates springback compensation in real-time based on force sensor data, significantly reducing process complexity while maintaining precision
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 effectively reduces geometric errors by almost three times, achieving accurate shape formation in the first trial for complex geometries, eliminating the need for iterative processes and minimizing time and costs associated with prior art techniques.
Implementation Method 1
a force sensor that may be configured to measure a forming force of the forming tool
Implementation Method 2
a forming tool that may be configured to deform a material in an incremental forming process
Implementation Method 3
predict material springback error induced geometries
Data Source
AI summary
Novel systems and methods for an incremental forming process to manufacture a product are disclosed herein. The system and method generally involves continuously modifying the toolpath in real-time based upon the forming force of the forming tool compared to a predicted springback error established offline from a series of simplified simulations. The system and method disclosed herein are effective to form products with complex geometries and minimizes the costs and time requirements associated with prior art techniques.