Load Handling Clamp Control System for Adaptive Clamping Force
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Solution Overview
Problem
Fluid power load-clamping systems with automatically variable maximum clamping force control face limitations in speed and versatility when handling diverse load types and configurations, particularly in complex scenarios involving both load geometries and characteristics, leading to reduced productivity.
Innovation Solution
A control system for load-handling clamps that utilizes an electronic code reader, load geometry sensors, and a controller to determine the optimal maximum clamping force by reading coded labels and measuring load geometry, adjusting hydraulic pressure dynamically to ensure proper clamping without damaging or slipping loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If automatically variable maximum clamping force control is implemented, then load handling versatility is improved, but clamping speed is reduced
Solution Approach 1:
The control system pre-determines the optimal maximum clamping force by reading coded labels and measuring load geometry before the clamping operation begins. This preliminary identification and calculation of clamping parameters eliminates delays during the actual clamping process, allowing the system to apply the correct force immediately upon load contact.
Solution Approach 2:
The system dynamically adjusts the maximum fluid pressure limit based on the specific load characteristics and geometry detected. The controller modifies pressure parameters in real-time according to the load type, weight, and configuration, enabling optimal clamping force adaptation without sacrificing speed through static pre-programming.
2Speed
If higher maximum fluid closing pressures are used during initial closure, then clamping speed is improved, but load damage risk increases
Solution Approach 1:
The system changes the pressure parameter dynamically during the clamping process. Initially, higher fluid closing pressures are permitted to achieve rapid closure. When load contact is detected, the controller immediately reduces the maximum fluid pressure limit to the optimal level for that specific load, thereby preventing damage while maintaining speed.
Solution Approach 2:
The pressure control operates in distinct phases: a high-pressure phase for rapid initial closure, followed by a pressure reduction phase upon load contact detection. This periodic pressure adjustment allows the system to achieve both high closing speed and load protection by timing pressure application appropriately.
3Device complexity
If manual clamping force adjustment is used, then system simplicity is maintained, but productivity is reduced
Solution Approach 1:
The clamp system performs self-identification and self-adjustment of clamping parameters. The electronic code reader automatically reads load identifiers, the geometry sensors measure load dimensions, and the controller autonomously determines optimal clamping force without operator intervention. This automation eliminates manual adjustment time while keeping the overall system relatively simple through integration of compact sensors and readers.
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 adaptive and efficient clamping of various load types and configurations, enhancing productivity by ensuring the optimal maximum hydraulic clamping pressure is applied based on real-time load characteristics and geometry, thereby improving handling speed and reducing the risk of damage or slippage.
Implementation Method 1
a hydraulic system having a source of hydraulic power and a valve manifold assembly for controlling flow of hydraulic fluid to and from the hydraulic cylinders
Implementation Method 2
load geometry sensors adapted for determining the physical characteristics of a load to be clamped by the clamp
Data Source
Figure 1A
Figure 1B
Figure 2~2A
AI summary
A control system for a load-handling clamp (10) includes first and second load- engaging surfaces (20, 22) for selectively gripping and releasing a load (12) disposed between said surfaces. At least one of said surfaces is selectively movable toward the other by a hydraulic actuator (26, 28). At least one fluid valve assembly (70) variably regulates a maximum hydraulic clamping pressure capable of causing the actuator to move one of the surfaces toward the other in a load clamping movement. Preferably, a load geometry sensor (50) produces an electrical effect that varies as a function of the geometric profile of the load. A data receiver (32) preferably also obtains load identification information related to at least one characteristic of the load, other than the load's geometry. A controller (40), in response to the data receiver and load geometry sensor, operates to control the valve assembly' s regulation of the maximum hydraulic clamping pressure. In order to prepare for the load clamping movement, the controller is preferably also capable of enabling the actuator to move one of said surfaces toward the other in an initial clamp closing movement at a maximum hydraulic closing pressure greater than the maximum hydraulic clamping pressure. Thereafter the controller enables the load clamping movement at a pressure level substantially no greater than the maximum hydraulic clamping pressure.