Motor Vehicle Subframe Cold-Extruded Sleeve Head Segmentation
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Solution Overview
Problem
Existing subframes for motor vehicles lack improved connection or articulation points and mounting sleeves with advanced manufacturing and component technologies, limiting their adaptability and performance.
Innovation Solution
The subframe features a frame body made of shell components with separate sleeve bodies and sleeve heads, where the sleeve heads are cold-extruded and integrated with the sleeve bodies, providing enhanced connection points and adaptability through complex shapes and materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mounting sleeves are designed as single-piece components formed by cold heading technology, then manufacturing simplicity is improved, but adaptability and connection performance deteriorate
Solution Approach 1:
The mounting sleeve is divided into two separate components: a sleeve body and a sleeve head. The sleeve body can be produced by cold heading technology for manufacturing simplicity, while the sleeve head can be manufactured separately with optimized geometry and material properties. This segmentation allows each component to be specialized for its specific function, improving overall adaptability and connection performance while maintaining ease of manufacture for the sleeve body.
2Device complexity
If mounting sleeves are designed as single-piece components, then component count is reduced, but connection performance and stability deteriorate
Solution Approach 1:
Dividing the mounting sleeve into sleeve body and sleeve head components allows each part to be optimized for its specific mechanical requirements. The sleeve body can be designed for insertion and positioning, while the sleeve head can be designed for enhanced load-bearing and connection stability. This segmentation improves connection performance without significantly increasing overall device complexity.
Solution Approach 2:
The sleeve body and sleeve head can be made from different materials or material treatments optimized for their specific functions. The sleeve body may use a material suitable for cold heading and insertion, while the sleeve head may use a material with superior strength or wear resistance properties, thereby improving overall connection performance and reliability.
3Ease of manufacture
If sleeve heads are integrated with sleeve bodies as single pieces, then assembly simplicity is improved, but manufacturing flexibility and adaptability deteriorate
Solution Approach 1:
By separating the sleeve head from the sleeve body, each component can be manufactured using the most appropriate process for its specific requirements. The sleeve body can be produced by cold heading, while the sleeve head can be manufactured by different processes such as casting, forging, or additive manufacturing, providing manufacturing flexibility and adaptability for different application requirements.
Solution Approach 2:
The separate sleeve head can be designed as a universal component that can be paired with different sleeve body types, or the sleeve head geometry can be varied to accommodate different connection requirements. This modularity provides manufacturing flexibility while maintaining relatively simple assembly through standardized interfaces.
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 enhances the subframe's connection points and adaptability, allowing for efficient integration into various motor vehicle chassis systems and improved stability and load-bearing capacity.
Implementation Method 1
The sleeve head is a cold-extruded part, wherein the passage opening in the sleeve head is created during cold extrusion in the sleeve head
Implementation Method 2
In the contact region with the wall, the mounting sleeves and the frame body are joined together in a material manner
Data Source
AI summary
A subframe for a motor vehicle has a frame body made of shell components and at least one mounting sleeve. Each mounting sleeve has a sleeve body with a longitudinal passage and a sleeve head with a passage opening. According to the present disclosure, the sleeve head is a cold extruded part, wherein the passage opening in the sleeve head is produced in the sleeve head during cold extrusion. The sleeve head is positioned on the front side on the sleeve body.