Extrusion Press Shearing Layout for Lower Height and Energy Use
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Solution Overview
Problem
Conventional shearing devices in extrusion presses require a high overall height due to the series arrangement of hydraulically driven shearing cylinders and slides, leading to increased building height requirements and inefficient energy use, as they need continuous hydraulic fluid supply for operations beyond the cutting process.
Innovation Solution
The shearing device employs a parallel arrangement of a ball screw for linear motion and hydraulic cylinders, allowing the shearing blade to be guided effectively during cutting while reducing the overall height and energy consumption by using inverter or servo motors to control hydraulic fluid supply only during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a hydraulically driven shearing cylinder is used to cut off the discard, then a large cutting force can be generated, but the overall height of the shearing device becomes higher due to the series arrangement of components
Solution Approach 1:
The patent transitions from a vertical series arrangement to a horizontal parallel arrangement of the ball screw and hydraulic cylinder. The ball screw is positioned horizontally above the hydraulic cylinder, both connecting to the shearing slide. This dimensional reconfiguration allows the cutting force to be generated horizontally rather than vertically, reducing the overall height requirement while maintaining cutting capability
Solution Approach 2:
The shearing device is segmented into two independent driving systems: a ball screw mechanism for precise positioning and a hydraulic cylinder for force generation. These segmented systems work in parallel rather than series, allowing each to perform its function independently and simultaneously, thereby reducing the cumulative height while maintaining both positioning accuracy and cutting force
2Productivity
If continuous hydraulic fluid supply is used for motor operation, then the motor can operate continuously, but energy consumption increases
Solution Approach 1:
The hydraulic cylinder operates periodically only during the shearing cutting phase rather than continuously. The inverter or servo motor controls the ball screw to position the shearing blade, and the hydraulic cylinder provides force only when cutting is required. This periodic operation eliminates unnecessary energy consumption during positioning and idle periods while maintaining continuous productivity through coordinated cyclic operation of both systems
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 configuration significantly lowers the height of the shearing device and the extrusion press, enabling energy savings by minimizing hydraulic fluid usage and optimizing motor operation during the shearing process.
Implementation Method 1
a converting means for converting rotational motion of a ball screw to linear motion of a shearing slide driving frame
Implementation Method 2
a hydraulic cylinder attached to the shearing slide driving frame... the shearing blade is acted on by force in various directions act due to the cutting resistance
Data Source
AI summary
An extrusion press shearing device includes: a converter that converts rotational motion of a ball screw into linear motion of a shearing slide drive frame; a shearing slide attached to the leading end of the shearing slide drive frame; and hydraulic cylinders attached to the shearing slide drive frame, wherein the ball screw of the converter and the hydraulic cylinders are arranged in parallel, and the ball screw is rotated to move the shearing slide vertically so that a discard is cut off by the hydraulic cylinders.