Metal Strip Edge Parallelism via Plastic Deformation
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Solution Overview
Problem
Existing methods for producing metal strips with parallel edges often result in arcuate or undulating edges due to machining at a single point, leading to warping and deviations from parallel alignment, which can cause issues in maintaining the required width and surface quality.
Innovation Solution
A method involving a straightening machine with multiple rollers that applies plastic deformation to correct edge deviations, using a serpentine path to bend the metal strip within its yield point, and an endless strip processing system to ensure uniform tension and prevent warping, allowing for precise correction of arches, saber shapes, and corrugations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the metal strip is machined at a single point to trim edges, then the strip width can be brought to a predetermined dimension, but the strip edges become arcuate or undulating and deviate from parallel alignment
Solution Approach 1:
The single-point machining process is segmented into multiple machining points arranged along the strip path. The trimming device includes several trimming tools positioned at different locations, allowing the strip to be trimmed at multiple points simultaneously or sequentially, which corrects both width and edge parallelism
Solution Approach 2:
A tensioning device is introduced as an intermediary element between the strip and the trimming tools. This tensioning device applies controlled tension to the strip during machining, preventing warping and ensuring the strip maintains a straight, parallel path through the machining zone, thereby achieving both precise width control and parallel edge alignment
2Stability of the object's composition
If warping in the metal strip is pressed together at the processing point by rollers, then the strip can be constrained during machining, but the strip edges deviate from parallel alignment and required dimensions are not maintained
Solution Approach 1:
The tensioning device serves as an intermediary that applies uniform tension along the strip length rather than localized pressing. This distributed tensioning approach stabilizes the strip during machining while maintaining its natural flatness and parallelism, avoiding the distortion caused by localized roller pressure
Solution Approach 2:
The tension force applied by the tensioning device is carefully controlled within an optimal range. By adjusting the tension parameter, the strip is stabilized enough to maintain parallel edges and precise width dimensions during machining, without excessive tension that would cause warping or dimensional deviations
3Manufacturing precision
If multiple trimming tools are used to correct edge deviations, then the strip can be brought to predetermined width, but the device complexity increases
Solution Approach 1:
The trimming tools are designed with universal functionality to handle both width trimming and edge straightening operations. The same trimming tools that cut the strip to predetermined width also correct edge parallelism when positioned and synchronized properly, eliminating the need for separate dedicated tools for each function
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
This approach ensures metal strips are produced with largely parallel edges, maintaining a predetermined width with high accuracy and surface quality, reducing waste and operational costs by efficiently using the metal material, and preventing damage from excessive tension or warping.
Implementation Method 1
the metal strip passes through a straightening machine with several straightening rollers arranged one behind the other and is plastically deformed
Implementation Method 2
the deflection is set so that a straight sheet reaches the yield point in both bending directions, but does not exceed it
Implementation Method 3
Straight sections in the metal strip are therefore only deformed for a short time, but spring back into their original position after passing through the straightening machine
Implementation Method 4
An arched or corrugated metal strip can also be plastically elongated during the straightening process by applying a tensile load in the longitudinal direction of the metal strip
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a method for producing a metal strip (2) with substantially parallel strip edges (20, 21), in which the metal strip (2) is edged, in that at least a part of the strip edges (20, 21) of the metal strip (2) is removed. In addition, the metal strip (2) is plastically reshaped during a straightening process. In order to carry out the method, a device (101..106) is provided, which comprises a trimming tool (10, 11) and a drive (3..6, 15..18) for generating a relative movement between the trimming tool (10, 11) and the metal strip (2) in the direction of the longitudinal axis of the metal strip (2). The device (101..106) also comprises a unit (7, 22..25) for plastic reshaping of the metal strip (2).