Rebar Separation Edge for Automated Counting
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Solution Overview
Problem
Existing systems for automatically dividing metal bars, such as those used in reinforced concrete, are complex, costly, and time-consuming, with a high risk of entanglement and require complex adjustments for varying bar thicknesses, leading to inefficiencies in operation and production.
Innovation Solution
A method and apparatus that uses a surface scanner and computer system to count and divide metal bars into subgroups by determining the relative positions and spaces between them, employing a movable separation edge to separate the bars into two subgroups, which are then transferred or stored, utilizing an electromagnet and shuttles for efficient handling without the need for grabbers or complex tracking tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a tracked tool with adjustable teeth is used to separate bars, then the desired number of bars can be released onto shuttles, but the system becomes complex and expensive to produce
Solution Approach 1:
The patent extracts the separation function from a complex tracked tool and implements it through a simple, stationary separation edge. The separation edge is a fixed structural element that passively divides bars based on their position, eliminating the need for complex adjustable mechanisms while maintaining automated separation capability
Solution Approach 2:
The patent replaces the mechanical tracked tool with adjustable teeth with a static separation edge combined with a laser-based detection system. The laser scanner optically identifies bar positions and spaces, allowing the simple separation edge to achieve the same functional result without mechanical complexity
2Measurement precision
If bars are dropped one by one from the counter onto shuttles, then counting can be performed, but the risk of entanglement increases
Solution Approach 1:
The patent performs preliminary identification of bar positions and spaces using a laser scanner before the separation action occurs. This allows the system to pre-determine the correct separation point and ensure bars are properly oriented and spaced before they are divided, preventing entanglement during the transfer process
Solution Approach 2:
The patent introduces a laser scanner as an intermediary detection system that measures bar positions and spaces without physical contact. This optical intermediary provides precise counting and positioning information that guides the separation process, enabling accurate counting while maintaining bar integrity and preventing entanglement
3Reliability
If a grabber is added to fix bars at the central position during shuttle transport, then entanglement is prevented, but the system becomes additionally complicated
Solution Approach 1:
The patent designs the separation edge and shuttle system so that bars are naturally guided and positioned by the geometry of the separation edge itself. The bars self-align and maintain proper position during transfer without requiring additional active control mechanisms like grabbers, achieving position stability through passive geometric constraints
Solution Approach 2:
Instead of using an active grabber to hold bars in position, the patent inverts the approach by designing the separation edge geometry to naturally guide and constrain bar positions. The passive geometric design of the separation edge performs the positioning function that would otherwise require an active mechanical grabber
4Manufacturing precision
If teeth are made movable to release only the desired number of bars, then precise separation is achieved, but the system requires complex adjustments for various bar thicknesses
Solution Approach 1:
The patent replaces the mechanical system of movable teeth with adjustable positions with a stationary separation edge combined with optical measurement. The laser scanner adaptively measures the actual positions and thicknesses of individual bars, allowing the fixed separation edge to achieve precise separation for bars of varying thicknesses through intelligent control based on real-time optical data
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 simplifies the process, reduces operation time, lowers production costs, and ensures safe and reliable counting and transfer of metal bars, achieving high-speed and flexible isolation of the desired number of bars with quality control capabilities.
Implementation Method 1
an electromagnet (10) which is arranged for collecting a group of metal bars (2) from the store (3) and lifting the group free from the store to a lifting level
Implementation Method 2
a counter which comprises a surface scanner and a computer system; the scanner being configured for scanning the surface of the group of metal bars while moving the surface scanner along a line across the group of metal bars
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
For feeding machines for rebars, a group of metal bars are collected in a single layer, for example on an electromagnet, counted by a scanner, and the group is divided into a first and second subgroup. This is accomplished by moving a separation edge (14) to an adjacent position near a space between the two subgroups and separating the first subgroup (2a) from a second subgroup (2b) by providing only the first subgroup of bars (2a) on the first side of the separation edge (14) and the second subgroup (2b) only on the second side of the separation edge (14). For example, the first subgroup (2a) falls onto a separation arm (13) that is located only on the first side of the separation edge (14) and the second subgroup (2b) passes the second side of the separation edge (14) for discharge back into the store (3).