Segmented Tie Bolt Assembly for Long Shank Manufacturing
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Solution Overview
Problem
Current manufacturing processes for tie bolts, especially those made of high mechanical strength materials like titanium alloys, face challenges in producing long shanks due to limitations in standard automatic molding machines and the need for specialized equipment, leading to inefficiencies and increased costs.
Innovation Solution
A process involving a shank and nut combination, where both are made of high mechanical strength materials, with self-locking threads that allow for secure locking and pre-load force generation, enabling the production of tie bolts with extended lengths using standard machinery, reducing production time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If standard automatic molding machines are used to manufacture tie bolts, then production efficiency is maintained, but the shank length is insufficient for automotive applications requiring lengths greater than 150 mm
Solution Approach 1:
The tie bolt is divided into two separate components: a shank and a head, which are manufactured independently and then assembled together. This segmentation allows the shank to be produced to the required length using standard machinery, while the head is separately formed and attached, resolving the limitation of standard molding machines unable to produce sufficiently long monolithic tie bolts
2Length of moving object
If specialized molding machines or semi-automatic presses are used to manufacture long tie bolts, then sufficient shank length is achieved, but production cost increases and production speed decreases
Solution Approach 1:
By segmenting the tie bolt into separately manufacturable shank and head components, the invention enables the use of standard high-speed molding machines for both parts, followed by rapid assembly. This approach maintains high production speed while achieving the required shank length, avoiding the need for slow specialized or semi-automatic equipment
3Length of moving object
If specialized equipment is used to manufacture tie bolts with sufficient length, then manufacturing capability is improved, but device complexity and cost increase
Solution Approach 1:
The segmentation of the tie bolt into shank and head allows both components to be manufactured using standard molding machines already present in typical production facilities. The assembly process uses conventional fastening techniques, eliminating the need for complex specialized equipment while achieving the required shank length
4Length of moving object
If monolithic tie bolts are manufactured to achieve sufficient length, then structural integrity is maintained, but manufacturing flexibility and adaptability are reduced
Solution Approach 1:
Segmenting the tie bolt into separate shank and head components provides manufacturing flexibility, allowing independent optimization of each part's dimensions and properties. The shank can be produced to any required length, and the head can be separately designed and attached, enabling easy adaptation to different automotive applications without retooling entire manufacturing processes
Data Source
AI summary
Tie bolt and process for making such tie bolt having a shank and a nut, in particular a dead nut; wherein the nut is tightened and locked around a respective end of the shank, so as to form an indivisible body.