Pre-forming Electrical Bar Conductors with Coating Protection
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Solution Overview
Problem
Existing methods for pre-forming electrical bar conductors struggle to achieve a balance between speed, forming accuracy, and preserving the integrity of the insulating coating, often resulting in damaged coatings and high scrap rates.
Innovation Solution
A pre-forming apparatus comprising a punch with a moving arm and a pre-forming head shaped as a fork, which hooks and bends the conductor, combined with rotating rollers to prevent abrasion, ensures precise and controlled bending while maintaining the coating's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional bending tools are used to pre-form electrical bar conductors, then forming speed can be increased, but the insulating coating becomes damaged due to abrasion
Solution Approach 1:
A coating transfer element is introduced as an intermediary between the bending tool and the conductor coating. This element mediates the bending process by preventing direct contact between the tool and coating, thereby eliminating abrasion damage while maintaining forming speed. The coating transfer element temporarily holds the coating during bending and transfers it to the final position without damage.
2Productivity
If conventional bending tools are used to pre-form electrical bar conductors, then forming speed can be increased, but geometric tolerance accuracy deteriorates
Solution Approach 1:
The conventional direct mechanical bending system is replaced with a coating transfer-based bending system. This substitution allows the bending process to be decoupled from coating contact, enabling independent optimization of forming speed and geometric precision. The coating transfer element provides a stable reference for precise bending while eliminating the variability caused by coating friction and damage.
3Productivity
If conventional bending tools are used to pre-form electrical bar conductors, then forming speed can be increased, but the rate of rejected conductors increases due to coating damage
Solution Approach 1:
The coating transfer element serves as a protective intermediary that eliminates direct abrasion between bending tools and conductor coating. By preventing coating damage, this intermediary ensures that conductors meet quality standards and are not rejected, thereby reducing scrap rate while maintaining high forming speed.
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 enables quick and accurate pre-forming of electrical bar conductors with minimal coating damage, reducing production scrap and ensuring the integrity of the insulating layer through controlled deformation and rolling friction.
Implementation Method 1
rotating rollers to prevent abrasion
Data Source
Figure 1
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AI summary
A pre-forming apparatus (4) for an electrical bar conductor (8), comprising a punch (12) provided with moving members for exerting a thrust on the conductor (8) during the relative pre-forming, the punch (12) being axially sliding along a pre-forming direction (X-X) and being provided with a cursor (20) and with a pre-forming head (24) suitable for engaging with the conductor (8). The apparatus (4) comprises a first pre-forming chamber (44) suitable for being crossed by the conductor (8) and by the punch (12) during the forward movement of the punch (12) for the pre-forming operation.