Link Part Hole Reinforcement During O-Bending and Welding
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Solution Overview
Problem
Conventional manufacturing methods for link parts do not ensure high dimensional accuracy of connecting holes, as the processes of press forming and welding can affect the dimensional accuracy of the cylindrical bush holding part without proper consideration.
Innovation Solution
A manufacturing method and device that includes a reinforcing process using a metal core inserted into pilot holes, followed by O-bending and axial bending processes, to maintain the shape and accuracy of the pilot holes and connecting holes, ensuring high dimensional accuracy of the link part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If press forming and welding processes are performed after forming the cylindrical bush holding part, then the link part can be manufactured with integrated structure, but the dimensional accuracy of the connecting hole deteriorates due to deformation during processing
Solution Approach 1:
The patent applies preliminary action by inserting a metal core into the pilot hole before performing press forming and welding processes. This preliminary insertion of the metal core prevents deformation of the connecting hole during subsequent processing steps, thereby maintaining dimensional accuracy while still allowing integrated structure manufacturing.
Solution Approach 2:
The metal core acts as an intermediary element inserted into the pilot hole. It serves as a support structure during press forming and welding operations, preventing the hole walls from deforming. The metal core is removed after processing, leaving a precisely formed connecting hole with maintained dimensional accuracy.
2Device complexity
If no metal core is inserted into the pilot hole, then the processing steps are simpler, but the pilot hole deforms during O-bending and axial bending processes
Solution Approach 1:
The metal core is inserted into the pilot hole as a preliminary action before O-bending and axial bending processes. This preliminary insertion provides internal support to the hole walls, preventing them from deforming during the subsequent bending operations that would otherwise cause significant shape changes.
3Manufacturing precision
If metal core is inserted into the pilot hole before O-bending and axial bending, then the dimensional accuracy of connecting hole is improved, but the processing time and complexity increase
Solution Approach 1:
The metal core insertion is performed as a preliminary action before the main forming processes. Although this adds a step to the process, it prevents the need for subsequent corrective operations and ensures high dimensional accuracy is maintained throughout, ultimately improving overall process efficiency and productivity.
Solution Approach 2:
The metal core serves as a temporary intermediary support structure that enables the main forming processes to proceed without damaging the connecting hole. Its presence during critical operations prevents deformation, and its removal is straightforward, making the overall time penalty minimal compared to the cost of rework or scrap from inaccurate holes.
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 method effectively curbs deformation of pilot holes during processing, resulting in link parts with higher dimensional accuracy and improved productivity.
Implementation Method 1
a reinforcing process of inserting a metal core into the pilot hole
Implementation Method 2
an O-bending process of O-bending the first side wall and the second side wall so that the other side edge of the first side wall and the other side edge of the second side wall are brought into contact with each other
Implementation Method 3
A fourth process of welding (w1) the arcuate surfaces 2r, 3r, and 2sr of the pair of winding and bending parts 2 and 3 and the polymerization connecting piece 2s to the outer circumferential surface Hr of the bush holding part H
Data Source
AI summary
This manufacturing method for a link part is a method of manufacturing a link part having one end portion having a connecting hole and provided on one side in one direction from an intermediate part which is long in the one direction and has a first side wall and a second side wall each having a pilot hole at least at one end portion and disposed to face each other and a connecting wall connecting one side edge of the first side wall and one side edge of the second side wall, and the other end portion provided on the other side therefrom in the one direction. The method includes a reinforcing process of inserting a metal core into the pilot hole, and an O-bending process of O-bending the first side wall and the second side wall so that the other side edge of the first side wall and the other side edge of the second side wall are brought into contact with each other after the reinforcing process.