Swiveling Switch for Drum Shear Scrap Channel

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Solution Overview

Problem

Existing drum shears cannot simultaneously cut short pieces and longer chopped pieces from moving metal strips at high speeds without compromising the ability to transfer the new material head for continuous operation, especially with thin strips that bend and cannot be guided over long scrap channel openings.

Innovation Solution

A swiveling switch behind the flying scissors dynamically adjusts the scrap channel opening based on the cutting process, allowing for a combination of cutting methods to guide the new material head over the scrap channel during short cuts and enlarge the opening for chopped pieces, controlled by an automation system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If drum shears are used to cut longer chopped pieces from moving metal strips at high speeds, then the scrap channel opening must be enlarged to accommodate the longer pieces, but the new material head cannot be reliably guided over the long opening, especially with thin strips that bend downwards

Engineering Contradiction:

Improvelength of chopped piecesVSAvoidreliability of material head transfer

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The scrap channel opening is made dynamically adjustable through a swivelable guide device that can change the opening size based on the cutting mode. During chopping operations, the opening is enlarged to accommodate long pieces, while during head transfer, the opening is reduced to ensure reliable guidance of the material head, thus resolving the contradiction between piece length and transfer reliability

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The geometric parameter of the scrap channel opening is changed dynamically to match different operational requirements. The opening size is adjusted as a controllable parameter: enlarged for chopping long pieces and reduced for transferring material heads, allowing the system to optimize both cutting capability and transfer reliability

Inventive Principle:

Principle #35Parameter changes

2Reliability

If drum shears are used to cut short pieces from moving metal strips, then the scrap channel opening can be kept short for thin strips to pass through, but the device cannot simultaneously cut longer chopped pieces

Engineering Contradiction:

Improvereliability of material head transferVSAvoidcutting mode flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The scrap channel system is designed to perform multiple functions: it can accommodate both short pieces and long chopped pieces, and reliably transfer material heads. The swivelable guide device enables the same scrap channel to adapt to different operational requirements, making the system universal and versatile

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If a single drum shear is used for both mulching and chopping operations, then device complexity is reduced, but it cannot simultaneously perform both functions without compromising operation continuity

Engineering Contradiction:

Improvenumber of cutting devicesVSAvoidoperation continuity

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The swivelable guide device dynamically adjusts the scrap channel opening based on the cutting mode being performed. This allows a single drum shear to switch between mulching and chopping operations without physical reconfiguration, maintaining operation continuity while reducing device complexity

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The operational parameters of the scrap channel (opening size) are changed dynamically to enable a single drum shear to perform both mulching and chopping functions. The controllable opening allows the system to adapt to different cutting modes, maintaining productivity and operation continuity with simplified equipment

Inventive Principle:

Principle #35Parameter changes

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

Enables reliable transfer of the new material head over the scrap channel after cutting, allowing for continuous operation and extending the use of a single device to cut short and long pieces, minimizing production waste and preventing interruptions in rolling operations.

Implementation Method 1

The scrap piece falls into this channel by gravity and is collected by a scrap system

Methodology Applied

Scientific EffectGravity: Gravitation

Data Source

PatentEP3307466B1Method for cutting workpieces comprising a switch point after a drum mounted with blades

Publication Date: 2019.05.22 SMS GROUP GMBH

Figure 1
Figure 1a~1c
Figure 2a~2c

AI summary

The invention relates to an arrangement and to a method for separating individual pieces from a metal strip coming from a rolling mill, said metal strip having flying shears, in particular drum shears, and evacuation lines arranged downstream thereof for the separated metal strip pieces. A separator, which can pivot in the plane or from the plane of the metal strip, is provided on the outlet of the metal strip of the shears; in accordance with the type of metal strip piece which is to be separated, the pivot angle of the separator can be controlled on channels used for the evacuation of scrap pieces, cut pieces or cropped pieces or is used for passing the pieces through the head piece of the metal strip.