Reverse-Operation Roll Bending for Compact Deflection Correction
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Solution Overview
Problem
Conventional roll press machines with bending mechanisms to correct roll deflection require increased cylinder size and cost when higher linear pressure is needed, due to the conventional operation direction of piston and piston rod.
Innovation Solution
A roll press machine with upper and lower reverse operation bending mechanisms that utilize hydraulic oil to apply bending loads in opposite directions, allowing for deflection correction without increasing machine size or cost, by using a pair of press rolls supported by main bearings and bending bearings with reverse operation mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the bending load is increased to correct greater roll deflection, then the deflection correction effectiveness is improved, but the cylinder size increases leading to increased machine size and cost
Solution Approach 1:
The patent inverts the conventional bending mechanism operation by making the piston rod move in the opposite direction to the bending bearing movement. When hydraulic oil is supplied, the piston moves to extend the piston rod in the direction opposite to the bending bearing movement, allowing the bending bearing to move upward (for deflection correction) while the piston rod extends downward. This inversion eliminates the need for large cylinder stroke space and allows compact cylinder design while maintaining effective deflection correction capability.
Solution Approach 2:
The patent changes the operational dimension by decoupling the piston movement direction from the bending bearing movement direction. Instead of moving in the same dimension (both upward), the piston moves downward while the bending bearing moves upward, utilizing opposite directions in the vertical dimension. This dimensional change allows the cylinder to be positioned lower in the machine structure and reduces the overall machine height requirement.
2Force
If the cylinder size is increased to provide higher bending load, then the deflection correction capability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent inverts the conventional bending mechanism operation by making the piston rod move in the opposite direction to the bending bearing movement. When hydraulic oil is supplied, the piston moves to extend the piston rod in the direction opposite to the bending bearing movement, allowing the bending bearing to move upward (for deflection correction) while the piston rod extends downward. This inversion eliminates the need for large cylinder stroke space and allows compact cylinder design while maintaining effective deflection correction capability.
3Reliability
If the machine size is increased to accommodate larger cylinder, then the bending mechanism capability is improved, but the space requirement and cost increase
Solution Approach 1:
The patent inverts the conventional bending mechanism operation by making the piston rod move in the direction opposite to the bending bearing movement. This allows the cylinder to be positioned lower in the machine structure, utilizing space more efficiently and reducing the overall machine footprint while maintaining full bending mechanism capability.
Solution Approach 2:
The patent changes the operational dimension by decoupling the piston movement direction from the bending bearing movement direction. Instead of moving in the same dimension (both upward), the piston moves downward while the bending bearing moves upward, utilizing opposite directions in the vertical dimension. This dimensional change allows the cylinder to be positioned lower in the machine structure and reduces the overall machine height requirement.
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 effective deflection correction of rolls without enlarging the machine or increasing costs, by optimizing the use of hydraulic pressure to generate bending loads that move the bending bearings in opposite directions, thus maintaining machine size and cost efficiency.
Implementation Method 1
operated with hydraulic oil
Implementation Method 2
by hydraulic pressure of the hydraulic oil
Data Source
AI summary
A roll press rolls each including an upper roll and a lower roll that are supported by a main bearing at both ends and rotate at a predetermined speed, upper and lower bending bearings that are disposed outside each of the main bearings and correct deflection of the press rolls by receiving a bending load, an upper reverse operation bending mechanism provided in the upper roll that operates with hydraulic oil, a lower reverse operation bending mechanism provided in the lower roll, and two upper reverse operation bending mechanisms and two lower reverse operation bending mechanisms being installed in the upper and lower bending bearings, respectively. Deflection occurring in the upper roll and the lower roll is corrected by causing the upper reverse operation bending mechanism or the lower reverse operation bending mechanism to generate downward power or upward power, respectively.