Mini-Coax Connector Sleeve Forming for Thin-Wall Precision
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Solution Overview
Problem
It is challenging to produce sleeves for mini-coax automotive connectors with correspondingly thin wall thicknesses that meet the stringent requirements of the automotive industry, such as those defined by FAKRA standards.
Innovation Solution
A method involving rolling and forming a starting workpiece into a sleeve shape with a predetermined wall thickness and outer diameter, followed by cutting and embossing to achieve the desired dimensions, using a non-magnetic austenitic metal alloy with a chromium content of at least 18% to ensure precise and efficient production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce sleeves for mini-coax automotive connectors, then production can proceed with standard processes, but the thin wall thickness required by FAKRA standards cannot be reliably achieved
Solution Approach 1:
The production process is divided into two distinct stages: first forming a pre-form with thicker walls, then drawing it to achieve the final thin-wall dimensions. This segmentation allows each stage to be optimized independently, ensuring both reliability and precision in the final product.
Solution Approach 2:
The method performs preliminary forming of a pre-form sleeve before final drawing. This preliminary action creates an intermediate structure that facilitates controlled material flow during the subsequent drawing operation, enabling reliable production of thin-walled sleeves with precise dimensions.
2Volume of moving object
If the wall thickness is reduced to meet mini-coax requirements, then the connector size is minimized, but production becomes increasingly challenging and less reliable
Solution Approach 1:
By splitting the forming process into two stages (pre-forming and drawing), the method makes thin-walled sleeve production more manageable. The pre-forming stage prepares the material in a controlled manner, while the drawing stage achieves the final thin dimensions, collectively improving manufacturing ease for small-volume components.
Solution Approach 2:
The preliminary pre-forming step creates an optimized intermediate structure that facilitates the subsequent drawing operation. This preliminary action ensures proper material distribution and flow, making the final thin-wall formation more reliable and easier to manufacture.
3Manufacturing precision
If a multi-step process is used to achieve precise thin wall thickness, then production reliability improves, but the number of manufacturing steps increases
Solution Approach 1:
The method combines pre-forming and drawing operations into an integrated two-stage process where the output of the first stage directly feeds into the second. This merging approach achieves precise wall thickness control while minimizing the number of separate manufacturing steps and tooling changes required.
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 method allows for the reliable and efficient production of sleeves with the required thin wall thickness and outer diameter, enabling the manufacture of high-quality mini-coax automotive connectors that meet industry standards, while minimizing material waste and optimizing production efficiency.
Implementation Method 1
rolling the starting workpiece to provide a first shape of the starting workpiece having a predetermined material thickness and size
Implementation Method 2
forming the rolled starting workpiece having the first shape into a second shape, wherein the second shape is substantially sleeve-shaped and has a first predetermined wall thickness and a first predetermined outer diameter
Data Source
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AI summary
One aspect concerns a method for manufacturing a sleeve for a coaxial connector, in particular a mini-coaxial automotive connector, comprising the following steps: - providing a starting workpiece for manufacturing the sleeve;- Rolling the initial workpiece to provide a first shape of the initial workpiece having a predetermined material thickness and size, - Forming the rolled initial workpiece having the first shape into a second shape, wherein the second shape is substantially sleeve-shaped and has a first predetermined wall thickness and a first predetermined outside diameter, and - Drawing the initial workpiece having the second shape into a third sleeve-shaped shape, wherein the third shape has a second predetermined wall thickness and a second predetermined outside diameter, and wherein the second predetermined wall thickness and the second predetermined outside diameter correspond to the wall thickness and outside diameter of a nominal sleeve.;