Steel Bar Cutting System for Mass Customization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for producing steel bars result in significant end losses due to standard lengths and bundle weights, which are not customizable to specific customer orders, leading to inefficiencies and waste in construction projects.
Innovation Solution
A method and apparatus that enable continuous production of steel bars cut to arbitrary specific lengths in-line, using a rolling mill with a flying shear, in-line cold shears, and a CPU to manage cutting and bundling, allowing for production of customer-ordered lengths without interrupting the rolling operation and minimizing end losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard lengths of 12m, 15m, or 18m are used for steel bars, then shipping and handling efficiency is improved, but end losses increase when cutting to specific customer lengths
Solution Approach 1:
The patent implements dynamic cutting length adjustment where the cutting system can adaptively change cut lengths based on customer orders and remaining bar length. The system dynamically optimizes cutting patterns to minimize waste while maintaining standard shipping bundle weights, resolving the contradiction between fixed standard lengths and customized customer requirements
Solution Approach 2:
The system changes the parameter of cutting length from fixed standard values to variable values based on customer specifications. By allowing cutting lengths to vary while maintaining bundle weight standards, the system reduces end losses without compromising shipping efficiency
2Loss of substance
If flash welding is used to create continuous billets, then end losses in rolling are reduced, but necking occurs at weld joints reducing cross-sectional area
Solution Approach 1:
The patent applies parameter changes by adjusting rolling conditions specifically at weld joints. The system modifies rolling parameters (such as roll speed, temperature, or pressure) when detecting weld joint locations to compensate for the necking effect, maintaining uniform cross-sectional area throughout the continuous billet
Solution Approach 2:
The system implements feedback control by monitoring the position of weld joints in continuous billets and adjusting rolling parameters in real-time. This feedback mechanism ensures that cross-sectional uniformity is maintained at weld joints while preserving the benefits of continuous rolling
3Productivity
If flying shear is used for in-line cutting, then production continuity is maintained, but cutting precision for arbitrary lengths is difficult to achieve
Solution Approach 1:
The patent replaces the traditional mechanical flying shear system with a cold shear cutting system that operates on stationary or slowly moving material. This substitution allows for programmable precision cutting of arbitrary lengths while maintaining production continuity through coordinated material feed and cutting cycles
4Productivity
If mass production of standard lengths is used, then manufacturing efficiency is improved, but adaptability to customer-specific lengths is reduced
Solution Approach 1:
The patent implements a dynamic cutting system that can rapidly adjust cutting lengths based on customer orders while maintaining continuous production. The system dynamically reconfigures cutting patterns and bundling arrangements to accommodate varying length requirements without sacrificing manufacturing efficiency
Solution Approach 2:
The system achieves universality by designing a multi-functional cutting and bundling apparatus that can handle both standard and custom lengths using the same production line. The apparatus can adapt its cutting patterns, bundle configurations, and shipping arrangements to serve diverse customer requirements within a single manufacturing process
Data Source
Figure 1
Figure 2
AI summary
A method and apparatus for producing steel bars (14) that are cut to length in response to a customer order. The method includes producing a continuous length of steel bar (12) from a rolling mill (11), cutting the continuous length of steel bar into successive segments (14), each representing a multiple of the length of the bar of the customer order, cutting the segments (14) in in-line cold shears (19,20) first into two times the length of the bar of the customer order and then in half into lengths equal to the length of the bar of the customer order while maintaining the production of the continuous length of steel bar (12) produced by the rolling mill (11), and bundling the bars of the length of the customer order for discharge from the mill.