Medical Instrument Deburring Faces for Precise Burr Removal
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Solution Overview
Problem
Existing medical instruments with pivotable body parts suffer from form and dimensional fluctuations due to hand-guided machining processes, and undefined heat input during burr removal by belt grinding.
Innovation Solution
The production method involves machine milling to create deburring faces perpendicular to a common machining plane, using a deburring longitudinal axis, and removing burrs while maintaining the alignment of the milling tool relative to this axis, allowing for precise and reproducible formation of medical instruments like scissors, pliers, and clamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hand-guided belt grinding is used to remove burrs, then burr removal is achieved, but form and dimensional fluctuations occur and undefined heat input is introduced
Solution Approach 1:
The patent replaces the mechanical hand-guided belt grinding system with a controlled machine milling system. The milling process uses a rotating milling tool guided by a template or programmable path to remove burrs, substituting the manual mechanical grinding process with a more precise machine-based system that eliminates human variability and provides controlled material removal.
Solution Approach 2:
The patent changes the machining parameters by using milling instead of grinding, and by controlling the depth of cut, feed rate, and tool path. The template-guided milling process allows for precise control of removal parameters, ensuring consistent burr removal without the dimensional fluctuations and heat input problems associated with hand-guided belt grinding.
2Ease of manufacture
If hand-guided belt grinding is used to remove burrs, then burr removal is achieved, but excessive heat input occurs
Solution Approach 1:
The patent replaces the mechanical hand-guided belt grinding system with a controlled machine milling system. The milling process uses a rotating milling tool guided by a template or programmable path to remove burrs, substituting the manual mechanical grinding process with a more precise machine-based system that eliminates human variability and provides controlled material removal.
Solution Approach 2:
The milling process uses periodic cutting action with the rotating milling tool, allowing for intermittent contact and heat dissipation. The controlled feed rate and tool rotation create periodic removal cycles that prevent excessive heat buildup compared to continuous hand-guided grinding.
3Manufacturing precision
If machine milling is used with template guidance, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a template as an intermediary element between the milling tool and the instrument body part. The template serves as a guide that defines the precise path and depth for burr removal, acting as a mediator that translates the complex milling operation into a simple follow-the-template process, thereby achieving high precision without requiring complex programmable equipment.
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 method reduces process fluctuations, prevents excessive heating, and ensures high-quality, reproducible medical instruments with clearly defined deburring faces, enhancing precision and stability.
Implementation Method 1
The at least one deburring face is formed by milling, in particular by machine milling
Data Source
AI summary
A medical instrument and method for producing a medical instrument with at least one instrument body part made from an instrument body part blank by forming. The at least one instrument body part has at least one deburring face formed by milling. The at least one deburring face includes one or more portions. Each portion extends perpendicularly to a machining plane. A normal to the machining plane defines a deburring longitudinal axis.