Electrode Plate Notching Die Parallelism Correction for Burr Control
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Solution Overview
Problem
The inconsistent parallelism of shear dies in secondary battery electrode plate manufacturing leads to issues such as inconsistent clearance, burrs, and damage to the punch and die, affecting product quality and die lifespan.
Innovation Solution
A secondary battery electrode plate manufacturing apparatus with a die parallelism maintaining device that includes an upper die, a lower die, and a parallelism correction block to maintain die parallelism by applying pressure to the upper die, using an upper slide, floating bars, and a load support portion to ensure vertical movement and lateral fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the die parallelism is determined based on the parallelism of press equipment, then the die can be installed and operated, but the parallelism becomes inconsistent and changes at random during use
Solution Approach 1:
A parallelism correction block is introduced as an intermediary component between the press equipment and the die. This correction block actively compensates for parallelism deviations by applying corrective forces, thereby maintaining consistent die parallelism despite variations in press equipment parallelism during operation
Solution Approach 2:
The system dynamically adjusts the parallelism parameter of the die by using the correction block to apply varying corrective forces. This allows the die parallelism to be maintained within specified tolerances even when press equipment parallelism changes during the notching process
2Manufacturing precision
If the parallelism of a die changes, then the punch verticality changes, but this makes it difficult to maintain consistent clearance and generates burrs
Solution Approach 1:
The parallelism correction block serves as a mediator that prevents punch verticality changes by compensating for die parallelism deviations. This ensures consistent clearance between the punch and electrode plate, eliminating the root cause of burr formation
Solution Approach 2:
The correction block applies preliminary corrective forces to maintain die parallelism before the notching operation occurs. By preventing parallelism deviations in advance, the system avoids punch verticality changes and subsequent burr generation
3Strength
If the parallelism of a die changes, then the punch and die are damaged, but this reduces die lifespan
Solution Approach 1:
The parallelism correction block provides beforehand cushioning by continuously maintaining proper die parallelism. This prevents excessive forces and misalignment damage that would otherwise occur during operation, thereby extending the service life of the punch and die
Solution Approach 2:
The correction block acts as a protective intermediary that absorbs and corrects parallelism deviations, preventing these deviations from transmitting damaging forces to the punch and die components
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
Maintains consistent die parallelism, reduces burr formation, and extends the lifespan of the punch and die, improving product quality and reducing maintenance frequency and investment costs.
Implementation Method 1
a parallelism correction block configured to apply pressure to the upper die such that the upper die is lowered while maintaining parallelism with respect to the lower die
Implementation Method 2
a floating bar connecting the upper slide and the upper die, fastened to the upper slide, and inserted into the upper die to be vertically movable and to be laterally fixed
Data Source
AI summary
A secondary battery electrode plate manufacturing apparatus includes: a coating unit configured to coat a substrate with an electrode material; a rolling unit configured to roll the coated substrate; and a notching unit configured to notch the rolled substrate to manufacture an electrode plate having a tab. The notching unit includes a die including: an upper die; a lower die; and a parallelism correction block configured to apply pressure to the upper die such that the upper die is lowered while maintaining parallelism with respect to the lower die.