Down Cut Billet Orientation Control for Clean Flash-Welded Joints
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Solution Overview
Problem
The existing flash welding process for steel billets with 'Down Cut' ends fails to produce a clean, deburred joint due to the random orientation of the billets, leading to surface imperfections in the final rolled products as the shaving cutters cannot access the excess weld material effectively.
Innovation Solution
A method and apparatus that determine the orientation of 'Down Cut' billet ends and rotate them to align the deformations, allowing for successful flash welding and subsequent deburring by shaving cutters, ensuring the excess weld material is removed from the joint, thereby preventing surface imperfections in the rolled products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flash welding is performed on down cut billet ends with random orientation, then the welding process can be completed, but the excess weld material cannot be properly removed by shaving cutters resulting in surface imperfections
Solution Approach 1:
The system determines the orientation of down cut billet ends before welding and rotates them to a predetermined alignment. This preliminary action ensures that the deformations are properly oriented so that shaving cutters can access and remove excess weld material effectively after welding, resolving the contradiction between maintaining welding productivity and achieving clean joints.
2Ease of operation
If billet orientation is randomized during feeding, then the feeding process is simple and fast, but the shaving cutters cannot access excess weld material in down cut joints
Solution Approach 1:
The system uses sensors or vision systems to detect the orientation of down cut billet ends in real-time, provides feedback to the control system, which then automatically rotates the billets to the correct orientation before welding. This closed-loop feedback mechanism maintains feeding simplicity while ensuring proper alignment to prevent surface imperfections.
3Device complexity
If no rotation mechanism is used, then the device complexity is low, but clean shaved joints cannot be achieved with down cut billets
Solution Approach 1:
The system introduces a rotation mechanism as an intermediary device between the billet feeding system and the welding apparatus. This intermediary component enables precise orientation control of down cut billet ends without significantly increasing overall system complexity, allowing clean shaved joints to be achieved while maintaining reasonable device simplicity.
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 removal of excess weld material from 'Down Cut' billets, preventing surface imperfections in rolled products like rebar and steel plates, and allowing for the production of endless bars from billets of any cut type without end losses.
Implementation Method 1
the tail end of the first billet and the front end of the second billet are heated by passing a high electrical current to partially melt these ends
Implementation Method 2
the electric arc melting of the billets
Data Source
AI summary
The present disclosure is directed to methods and apparatuses for welding together steel billets for forming endless bar for continuously rolling into a rolled product. In particular, the apparatuses and methods disclosed herein are for use in welding together steel billets having down cut ends.