Locating Device for Precision Blank Centring
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Solution Overview
Problem
Traditional stamping and blanking tools face challenges in achieving high precision and optimal centring of blanks due to mechanical interference and deformation, leading to low accuracy positioning, especially at final working stations.
Innovation Solution
The process involves using a locating device with an engaging portion that fits the contour of a previously blanked portion's centring hole, allowing for high-accuracy centring and minimizing undesired movements, while the stripper element engages only after fine centring is completed to prevent deformation and ensure precise separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stripper element engages the blank before the locating device completes centring, then the blank is secured early in the process, but mechanical interference and deformation occur that reduce positioning accuracy
Solution Approach 1:
The locating device is designed to engage the blank and complete fine centring before the stripper element engages. This preliminary action ensures that the blank is precisely positioned on the die before any securing forces are applied, eliminating mechanical interference that would otherwise degrade positioning accuracy.
Solution Approach 2:
The tool is divided into distinct functional elements - the locating device for precision positioning and the stripper element for securing - that operate in a specific sequence. This segmentation allows each element to perform its function optimally without interfering with the other, maintaining both reliability and manufacturing precision.
2Manufacturing precision
If the locating device engages the blank early in the process, then positioning accuracy is maximized, but mechanical interference occurs that causes deformation
Solution Approach 1:
The locating device engages the blank in advance to establish precise centring before the blanking operation begins. By completing the positioning action beforehand, the system maximizes centring accuracy while avoiding subsequent mechanical interference that would cause deformation during the blanking process.
Solution Approach 2:
The locating device is designed with dynamic engagement characteristics that allow it to establish precise positioning initially, then maintain that position without causing harmful interference. The device adapts its interaction with the blank to provide stability during positioning while preventing deformation during subsequent operations.
3Productivity
If the stripper element operates simultaneously with the locating device, then the process cycle time is reduced, but positioning precision deteriorates due to competing mechanical actions
Solution Approach 1:
The locating device completes its centring action before the stripper element engages the blank. This sequential arrangement, while adding a small time element, ensures that positioning precision is not compromised by simultaneous competing mechanical actions. The brief additional time is necessary to maintain the high positioning precision required for quality blanking.
Solution Approach 2:
The tool employs periodic, sequential engagement of different elements - first the locating device for positioning, then the stripper element for securing. This periodic action pattern ensures that each element performs its function without interference, maintaining positioning precision while keeping the overall cycle time efficient.
Data Source
AI summary
The present invention concerns a process and an apparatus for positioning blanks in a tool provided with at least one die, at least one locating device for centring the lamination and at least one stripper element for separating the blank from the locating device. The locating device has an engaging portion having shape and dimensions so as to engage the contour of a centring hole placed inside the profile of the lamination obtained as final product and having the shape of a portion previously blanked.