Deburring Knife Holder with Segmented Bolts
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Solution Overview
Problem
Conventional deburring tools require complex and costly assembly processes, with a single transverse bolt serving both to mount and swivel the knife holder, making it difficult to replace bar blades and weakening the blade due to the need for a transverse hole in hardened steel, resulting in high production costs.
Innovation Solution
The deburring tool features a knife holder with two shorter transverse bolts for swiveling and a mounting hole with a positioning bolt and stop edge, along with a pullout safety device, allowing for easier and more stable bar blade insertion and securement, eliminating the need for a costly transverse hole and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transverse bolt is used to both mount and swivel the knife holder, then the device complexity is reduced, but the ease of operation deteriorates because bar blade replacement becomes difficult
Solution Approach 1:
The single transverse bolt is segmented into two separate functions: two shorter transverse bolts handle swiveling, while a separate mounting bolt with pullout safety device handles bar blade retention. This segmentation allows independent optimization of each function, enabling easy blade replacement without affecting the swiveling mechanism.
2Ease of manufacture
If a transverse hole is made in highly hardened steel bar blade, then the mounting is enabled, but the manufacturing precision deteriorates due to costly erosion process
Solution Approach 1:
The mounting hole requirement is extracted from the bar blade and transferred to the mounting bolt itself. The bar blade remains solid without holes, while the mounting bolt incorporates the hole and threading needed for attachment. This eliminates the need for costly erosion processes on hardened steel blades.
3Ease of manufacture
If a transverse hole is made in the bar blade, then the mounting is enabled, but the strength deteriorates because the blade can no longer transfer torsion and bending moments
Solution Approach 1:
The mounting hole is extracted from the bar blade and relocated to the mounting bolt. The bar blade remains as a solid, continuous piece capable of withstanding torsion and bending moments, while the mounting bolt absorbs the hole and threading requirements through its own structure.
Solution Approach 2:
The mounting bolt acts as an intermediary element between the bar blade and the knife holder. It provides the mounting hole and threading functionality without compromising the bar blade's structural integrity, serving as a mediator that separates the mounting function from the load-bearing function.
4Reliability
If three separate parts are used to secure the bar blade, then the reliability improves, but the device complexity increases
Solution Approach 1:
The mounting hole, positioning features, and retention mechanism are merged into a single mounting bolt component. The pullout safety device is integrated into this same component, creating a unified mounting assembly that provides reliable bar blade securing without requiring three separate parts.
Data Source
AI summary
Deburring knife for deburring straight or nonround hole edges with a base body driven rotationally around its longitudinal axis, in which one or more bar blades are replaceably accepted into a swivel-mounted knife holder in a base body, by which the knife holder has at least one control recess located on its circumference, in which a spring component engages, which guides the rotation of the knife holder in the base body, characterized by the fact that for pivot bearing of the knife holder in the base body of the knife holder there are two drilled holes located across from one another vertically to the mounting hole of the bar blade, into each of which the end of a bearing bolt engages, whose other end goes into a transverse hole in the base body and serves to rotate the knife holder in the base body that one or more bar blades are thereby easily and replaceably mounted in the radial mounting hole in the knife holder, that at least one stop preventing axial displacement and one pullout safety device for security in the axial direction are in place for the bar blade.