Electrode Plate Shearing Clearance Control Using Pressure Feedback
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Solution Overview
Problem
Conventional measurement equipment is unable to accurately measure the clearance of a shear mold used in manufacturing electrode plates for rechargeable batteries, leading to potential burrs and defective products due to changes in clearance during repetitive shearing processes.
Innovation Solution
An electrode plate processing apparatus that includes a punch, a die, a pressure measurement member, a clearance adjustment unit, and a control unit, which measures pressure applied during the shearing process and adjusts the clearance between the punch and die to maintain optimal conditions, preventing burrs and ensuring product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement equipment is used to measure the clearance of the shear mold, then the measurement process is simple, but the measurement precision is insufficient to detect clearance changes during repetitive shearing processes
Solution Approach 1:
The patent replaces conventional mechanical measurement equipment with a pressure-based measurement system. A pressure measurement member (pressure sensor) is installed on the punch or die to measure pressure changes during the shearing process. Since pressure and clearance are correlated (clearance changes affect contact pressure), this substitution enables precise indirect measurement of clearance without requiring complex mechanical measurement devices capable of sub-micrometer resolution.
Solution Approach 2:
The patent introduces pressure as an intermediary parameter to measure clearance indirectly. Instead of directly measuring the physical gap between punch and die, the system measures the pressure exerted during shearing, which varies with clearance changes. This intermediary approach allows clearance monitoring using simpler pressure sensors while achieving the required measurement precision.
2Reliability
If the clearance is set precisely at the beginning of operation, then the initial product quality is high, but the clearance changes during repetitive shearing process leading to defective products
Solution Approach 1:
The patent implements a feedback control system where the pressure measurement member continuously monitors pressure during shearing operations. The control unit receives this pressure data and compares it against reference values to detect clearance changes. When clearance deviation is detected, the system automatically triggers the clearance adjustment unit to restore the optimal clearance, thereby maintaining consistent product quality throughout the shearing process.
Solution Approach 2:
The patent transforms the static clearance setting into a dynamic, adjustable system. The clearance adjustment unit (comprising pressing members, elastic members, and power generating members) enables real-time modification of the clearance between punch and die based on actual process conditions. This dynamic capability allows the system to adapt to clearance changes caused by wear, thermal expansion, or other factors during repetitive operation.
3Manufacturing precision
If the clearance is reduced to avoid burrs on the electrode, then the manufacturing precision improves, but the device complexity increases due to precise clearance control requirements
Solution Approach 1:
The feedback mechanism continuously monitors pressure during shearing and automatically adjusts clearance to maintain optimal values. This eliminates the need for manual precision setting and complex mechanical stop mechanisms, as the system self-regulates clearance based on real-time pressure feedback, thereby achieving high manufacturing precision with manageable device complexity.
Solution Approach 2:
The system performs self-adjustment of clearance based on pressure feedback without requiring external intervention or complex positioning mechanisms. The control unit automatically commands the clearance adjustment unit to maintain optimal clearance, enabling the system to self-correct for wear or drift, thus achieving precise shear surfaces with a relatively simple control architecture.
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 apparatus effectively measures and adjusts the clearance in real-time, minimizing burr formation and reducing the likelihood of defective products, thereby enhancing the quality and reliability of electrode plates produced.
Implementation Method 1
a pressure measurement member installed on at least one of the punch or the die, and measuring a pressure applied to the punch or the die in a process in which the punch is lowered
Data Source
AI summary
An electrode plate processing apparatus includes: a punch configured to cut an electrode plate; a die configured to seat the electrode plate thereon and accommodating the punch; a pressure measurement member on at least one of the punch or the die, and configured to measure a pressure applied to the punch or the die in a process in which the punch is lowered; a clearance adjustment unit on the die, and configured to adjust a clearance between the punch and the die by pressing the punch; and a control unit configured to control an operation of the clearance adjustment unit based on the pressure measured by the pressure measurement member.