Sheet Metal Straightening Feed Control Without Looping Pits
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Solution Overview
Problem
Existing methods for processing plastically deformable workpieces, such as sheet metal, require significant installation space and manufacturing effort due to the formation of loops during processing, which necessitate the use of voluminous storage facilities.
Innovation Solution
A method and mechanical arrangement that utilize a straightening device to plastically deform the workpiece into the intended shape, controlling the advancement speed and feeding speed to manage the intermediate length of the workpiece between the straightening device and the feeding drive, thereby avoiding the need for extensive storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conveying device continuously conveys sheet metal strip through a roller straightening machine, then the sheet metal strip can be processed without interruption, but an open sheet metal strip loop forms upstream of the stopped conveying device that grows as processing time increases, requiring a considerable looping pit and installation space
Solution Approach 1:
The patent applies dynamics by making the conveying device stoppable and controllable. The conveying device can be stopped during laser cutting operations while the roller straightening machine continues to operate, creating a controlled stationary state rather than continuous motion. This dynamic control allows the sheet metal strip to be held in position without requiring a large looping pit, as the conveying device can be precisely controlled to stop and start as needed.
Solution Approach 2:
The patent applies preliminary action by having the roller straightening machine continuously prepare and straighten the sheet metal strip in advance before it reaches the laser cutting zone. This ensures that when the conveying device stops for cutting operations, the strip is already in the correct shape and position, eliminating the need for a large looping pit to accommodate unprocessed material.
2Manufacturing precision
If the conveying device is stopped during processing to allow laser cutting, then the sheet metal strip can be processed with precision, but the continuous conveyance creates a growing loop that requires a looping pit with considerable manufacturing effort
Solution Approach 1:
The patent applies dynamics by implementing a conveying device with precise stop-and-start capability. The device can be stopped during laser cutting to ensure precision, and restarted immediately after cutting is complete. This dynamic control eliminates the need for a permanently installed looping pit, reducing manufacturing effort while maintaining cutting precision.
Solution Approach 2:
The patent applies the extraction principle by removing the need for a permanent looping pit structure. Instead of building a fixed storage space for the sheet metal loop, the system extracts the looping function into the controllable motion of the conveying device itself, which can create and release the loop as needed without permanent infrastructure.
3Ease of operation
If the advancement speed of the workpiece is not controlled, then the processing can proceed without speed adjustments, but the intermediate length of the workpiece may exceed the maximum intermediate length, causing tautening or delays
Solution Approach 1:
The patent applies feedback by continuously monitoring the intermediate length of the workpiece between the roller straightening machine and the conveying device. The control system adjusts the advancement speed of the roller straightening machine based on this feedback, ensuring the intermediate length never exceeds the maximum allowed length. This prevents workpiece tautening and maintains reliable operation.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the advancement speed parameter of the roller straightening machine. When the intermediate length approaches the maximum limit, the system reduces the advancement speed to maintain proper tension and length control. This parameter adjustment ensures reliable operation while maintaining ease of operation through automated control.
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 reduces the size and manufacturing effort required for the mechanical arrangement, minimizes the formation of straightening marks, and avoids undesirable tautening or delays in the processing of the workpiece.
Implementation Method 1
plastically deforming the workpiece using at least one forming element of a straightening device, thereby changing the workpiece into the intended shape for processing
Data Source
AI summary
A method for processing a plastically deformable workpiece includes driving the workpiece using a workpiece drive so that the workpiece is moved to a feeding drive. driving the workpiece using a feeding drive so that a partial length of the workpiece is conveyed to a working region to be processed, driving the workpiece using the workpiece drive while the feeding drive has been stopped so that an intermediate length of the workpiece is arranged between the workpiece drive and the feeding drive. An advancement speed is adjusted such that the intermediate length is shorter than or equal to a maximum intermediate length. While the workpiece is being conveyed into the working region, a feeding speed of the workpiece generated by the feeding drive and the advancement speed generated by the workpiece drive are adjusted such that the intermediate length is shorter than or equal to the maximum intermediate length.