Fracture Powder Removal Using Perpendicular Vibration
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Solution Overview
Problem
Existing fracture surface treatment methods for ductile metal parts, such as connecting rods, often leave behind adherent fracture powder, which interferes with the face fitting operation, either due to vibration direction alignment or repeated loading and unloading processes.
Innovation Solution
A method and apparatus that apply a specified vibration to fracture surfaces in a direction intersecting the fracture direction, while maintaining a space between them, to effectively remove fracture powder, and optionally use air blowing to enhance removal, followed by pressing the surfaces together to ensure proper fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If vibration is applied in the direction of fracture to remove fracture powder, then some fracture powder is stripped off, but the remaining fracture powder becomes firmly stuck onto the fracture surface
Solution Approach 1:
The patent changes the vibration direction from parallel to the fracture surface (conventional method) to perpendicular to the fracture surface. This dimensional change allows the vibration to dislodge fracture powder particles without causing them to adhere to the surface, effectively resolving the contradiction between powder removal and surface cleanliness.
Solution Approach 2:
Instead of applying vibration in the conventional direction (parallel to fracture surface), the patent inverts the approach by applying vibration perpendicular to the fracture surface. This inverted direction enables effective powder removal while preventing adhesion, thereby improving both ease of manufacture and manufacturing precision.
2Ease of operation
If fracture surfaces are pressed against each other to fit them together, then face fitting operation is performed, but fracture powder adheres firmly to the fracture surface
Solution Approach 1:
The patent applies vibration perpendicular to the fracture surface before the face fitting operation. This preliminary action removes fracture powder from the surfaces in advance, preventing subsequent adhesion during pressing, and ensures clean fracture surfaces for optimal fitting.
Solution Approach 2:
By applying vibration perpendicular to the fracture surface rather than parallel, the patent effectively removes fracture powder without causing it to adhere during the pressing operation, thereby maintaining both ease of operation and manufacturing precision.
3Ease of manufacture
If the cap reciprocates during fracture surface treatment, then fracture powder is partially removed, but the treatment process becomes complex
Solution Approach 1:
Instead of reciprocating the cap parallel to the fracture surface (conventional method), the patent inverts the approach by applying vibration perpendicular to the fracture surface. This simplified inverted approach achieves effective powder removal without requiring complex reciprocation mechanisms.
Solution Approach 2:
The patent employs mechanical vibration applied perpendicular to the fracture surface as a simpler alternative to cap reciprocation. This vibration method achieves fracture powder removal with a less complex device configuration, resolving the contradiction between manufacturing ease and device complexity.
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 approach securely removes fracture powder without re-contacting the surfaces, improving the face fitting operation and making the final assembly of ductile metal parts easier by ensuring clean and fitting fracture surfaces.
Implementation Method 1
applying a specified vibration to at least one of said fractured ductile metal part portions in a direction intersecting the direction of fracture
Implementation Method 2
blowing air to the fracture surfaces of the fractured ductile metal part at the time of applying said specified vibration
Data Source
AI summary
A fracture surface treatment method of a fractured ductile metal part for treating fracture surfaces 51a and 52a of the ductile metal part 50, said fracture surfaces 51a and 52a being fracture surfaces obtained by a fracturing operation of fitting halved mandrel portions into a penetrative bore of the ductile metal part having the penetrative bore and driving a wedge in between the halved mandrel portions, said fracture surface treatment method holding said fractured ductile metal part 50 in a state where said fracture surfaces 51a and 52a are separated from each other so as to keep a certain space between them, applying a specified vibration to at least one of said fractured ductile metal part portions in a direction intersecting the direction of fracture and removing fracture powder 59 stuck on said fracture surfaces 51a and 52a, and thereby enabling the optimum face fitting operation in case of fitting again the fracture surfaces of the fractured ductile metal part to each other.