Servomotor Pressing Roller Sheet Joining Control
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Solution Overview
Problem
Existing sheet supply devices face challenges in accurately joining sheets from one roll to another due to poor control over the moving distance and pressure force of the pressure contact roller, leading to inconsistent sheet joining.
Innovation Solution
A sheet supply device with a servomotor-driven pressing roller that performs torque and position control to accurately press the sheet from one roll against the second roll, ensuring precise timing and pressure force during the joining process, utilizing a controller to manage the shaft drive and motor operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an air cylinder is used to drive the pressure contact roller, then the structure is simple and easy to implement, but the response is slow and pressure fluctuation occurs making accurate control difficult
Solution Approach 1:
The patent replaces the air cylinder (pneumatic system) with a servomotor (electrical system) to drive the pressure contact roller. This substitution eliminates the response delays and pressure fluctuations inherent in pneumatic systems, enabling precise control of the roller's position and pressing force through electrical signal control, while maintaining structural simplicity through integrated motor-control unit design.
2Reliability
If the pressure contact roller is pressed against the second roll, then sheet joining can be achieved, but accurate control of moving distance and pressing force becomes difficult
Solution Approach 1:
The patent incorporates feedback control through the controller that receives position information from a sensor detecting the location of the pressure contact roller and adjusts the servomotor's output accordingly. This closed-loop control system ensures the roller reaches the precise position and applies the exact pressing force required for reliable sheet joining, overcoming the open-loop control limitations of conventional air cylinder systems.
Solution Approach 2:
The patent employs dynamic control by using a servomotor that can precisely adjust its output torque and speed in real-time based on control signals. This allows the pressure contact roller to be pressed against the second roll with accurately controlled moving distance and pressing force, ensuring consistent and reliable sheet joining while maintaining the ability to adapt to varying operational conditions.
3Manufacturing precision
If the pressure contact roller is pressed against the adhesive tape at the appropriate timing, then accurate sheet joining is achieved, but control over pressing timing becomes difficult with air cylinders
Solution Approach 1:
The patent replaces the air cylinder with a servomotor that responds immediately to electrical control signals without the compression delays and pressure stabilization time characteristic of pneumatic systems. This enables precise timing control of when the pressure contact roller is pressed against the adhesive tape, achieving accurate sheet joining while reducing overall response time through direct electrical actuation.
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
The solution enables accurate and reliable joining of sheets by maintaining precise control over the pressing roller's position and force, ensuring consistent sheet supply without interruptions.
Implementation Method 1
a servomotor that drives the pressing roller so as to press the sheet of the first roll against an outer peripheral surface of the second roll
Implementation Method 2
press the sheet of the first roll against an outer peripheral surface of the second roll
Implementation Method 3
the sheet of the second roll is joined to the sheet of the first roll via an adhesive tape provided on the outer peripheral surface of the second roll
Data Source
AI summary
A controller includes a shaft control unit that controls driving of a shaft drive source such that a standby side roll is rotated, and a unit control unit that presses a pressing roller against an outer peripheral surface of the standby side roll via a sheet of a supply side roll by performing torque control on a unit drive source in a state in which the pressing roller is positioned in an area from a control switching position to the outer peripheral surface of the standby side roll together with performing position control on the unit drive source in a state in which the pressing roller is positioned in an area farther away from the standby side roll than the control switching position away from the outer peripheral surface of the standby side roll by a preset distance while the standby side roll is rotated by the shaft control unit.