U-Shaped Scarfing Machine with Pivoting Burner Beam
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Solution Overview
Problem
Conventional scarfing machines for steel workpieces require multiple operations and rearrangements to scarf all sides, leading to increased time, transport costs, and high maintenance expenses due to bulky and complex equipment.
Innovation Solution
A compact scarfing machine with a U-shaped burner beam and distributor strip scarfing unit, adjustable in height and pivoting mechanism, allows for efficient scarfing of all six sides without external turning devices, using a single station on a roller conveyor, with angled burner lips to prevent contamination and optimize scarfing angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional scarfing machines use multiple operations with external turning devices to scarf all sides of workpieces, then all sides can be scarfed, but the equipment becomes bulky, heavy, and complex with high maintenance costs
Solution Approach 1:
Instead of moving the heavy workpiece externally between multiple fixed scarfing stations using bulky turning devices, the invention inverts the approach by bringing the scarfing burners to the workpiece. The burner beam with scarfing units is positioned over the workpiece on the roller conveyor and can pivot to access all six sides, eliminating the need for external turning mechanisms and multiple rearrangement operations.
Solution Approach 2:
The burner beam assembly serves multiple functions: it can scarf all six sides of the workpiece (top, bottom, four longitudinal sides), adjust its position vertically via lifting cylinders, and pivot horizontally to access different faces. This multi-functional design replaces the need for separate scarfing units for each side and eliminates bulky turning devices.
2Adaptability or versatility
If multiple operations and rearrangements are performed to scarf all sides of the workpiece, then complete scarfing is achieved, but time consumption and transport costs increase
Solution Approach 1:
The burner beam remains positioned over the workpiece throughout the entire scarfing process, continuously scarving different sides by pivoting and moving along the workpiece length. The workpiece is moved back and forth once on the roller conveyor while the burner beam pivots to access all six sides, eliminating multiple rearrangement operations and reducing total processing time.
Solution Approach 2:
The burner beam is designed with dynamic capabilities: it can pivot horizontally to access different faces of the workpiece, adjust vertically via lifting cylinders, and move along the workpiece length. This dynamic positioning allows all six sides to be scarfed in a single continuous operation without multiple rearrangements.
3Adaptability or versatility
If a rigid vertically erected scarfing burner frame with multiple burners is used to enclose the workpiece, then all sides can be scarfed, but manufacturing and maintenance costs become very high
Solution Approach 1:
Instead of a single rigid enclosing frame with burners on all four sides, the invention segments the scarfing function into a movable burner beam with distributor strips. The burner beam can be positioned and pivoted to access all sides sequentially, replacing the need for a complex rigid frame structure with multiple burners mounted on all faces.
Solution Approach 2:
The burner beam acts as an intermediary mechanism between the fixed support structure and the workpiece. It provides the scarfing function without requiring a rigid enclosing frame, using instead a pivoting beam with distributor strips that can access all sides of the workpiece through controlled movement rather than structural enclosure.
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 solution reduces media consumption, maintenance costs, and eliminates the need for bulky turning devices, enabling safer, more economical, and efficient scarfing of all sides with reduced operational complexity.
Implementation Method 1
A flow of scarfing oxygen is then blown onto the preheated strip
Implementation Method 2
heating an edge or a strip on the workpiece surface to iron ignition temperature
Implementation Method 3
A flow of scarfing oxygen is then blown onto the preheated strip and there is a relative movement between the flow of scarfing oxygen and the workpiece
Data Source
Figure 1
Figure 2~4
AI summary
The invention relates to a scarfing machine (1) for scarfing hot and cold workpieces (2) made of steel, such as slabs, blocks and billets, in and downstream of continuous casting systems with a roller conveyor (3) located in the transport direction of the workpiece (2), on which conveyor the workpiece (2) to be scarfed can be moved forwards and backwards. The scarfing machine (1) is further characterized in that it is set up in a gap (4) formed in the roller conveyor (3), which gap has a U-shaped burner beam (7) that is arranged transversely to the roller conveyor (3) and has a scarfing unit (10) formed as a distributor strip. The burner beam (7) is height-adjustable and can be pivoted by means of a pivot drive (6) by approximately 180? about a horizontal axis (8) around the top, bottom and sides of the workpiece (2) to be scarfed as the workpiece (2) moves forwards and backwards.