Terminal Fitting Escaping Portion for Mold Interference
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Solution Overview
Problem
In the process of crimping terminal fittings onto wires, the plastic deformation of the crimping portion leads to a backward projecting distance of the link, causing interference and leakage between adjacent wires, especially when the link is cut behind the rear end of the crimping portion.
Innovation Solution
The crimping portion is designed with an escaping portion at its rear end, allowing the cutting mold to be positioned ahead of the crimping portion's rear end, thereby reducing the backward projecting distance of the link and preventing interference between the cutting mold and crimping pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the link is cut behind the rear end of the crimping portion, then the cutting mold can be positioned to avoid interference with the crimping portion, but the backward projecting distance of the link increases causing interference between adjacent wires
Solution Approach 1:
The crimping portion is divided into two segments: a front crimping piece and a rear crimping piece, with an escaping portion formed between them. This segmentation allows the cutting mold to be positioned in the escaping portion, enabling the link to be cut before the rear end of the crimping portion while avoiding interference with the crimping pieces during crimping operation.
2Strength
If the crimping portion is deformed plastically with high compression rate, then the crimping connection strength is improved, but the backward projecting distance of the link increases
Solution Approach 1:
The escaping portion is formed in advance on the crimping portion before the crimping operation. This preliminary action allows the cutting mold to be positioned correctly, enabling the link to be cut at the optimal location that prevents excessive backward projection even when high compression rate plastic deformation is applied during crimping to ensure strong connection.
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
This design effectively suppresses the backward projecting distance of the link, preventing interference and leakage between adjacent wires, while maintaining the structural integrity of the crimping pieces and allowing for efficient crimping and cutting operations.
Implementation Method 1
At least one serration preferably is formed in a surface to be held in contact with a core of the wire and can bite in the core. Thus, a film with reduced electric conductivity on the core is scraped off by opening edges of the serration.
Implementation Method 2
The crimping portion 5 is deformed plastically to extend in forward and backward directions when a high compression rate is set for compressing the core.
Data Source
AI summary
A wire with a terminal fitting (10) formed by crimping and cutting a terminal fitting with a carrier in which a terminal fitting (12) projecting forward is coupled to a carrier (C). The wire with the terminal fitting (10) is provided with a crimping portion (30) to be crimped into connection with an end portion of an insulated wire 40 formed by covering a core (42) with a coating (43), a link (13) coupling the crimping portion (30) and the carrier (C), and an escaping portion (35) formed by partly cutting off a rear end part of the crimping portion (30) and enabling a cutting mold (53) for cutting the link portion (13) to be arranged at a position where a front end (53A) of the cutting mold (53) is located before the rear end of the crimping portion (30).