Cutting Tool Contact Plug Layout for Clean Start Position Sensing
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Solution Overview
Problem
Existing cutting machining devices face challenges in reducing contamination of screws during the machining process, particularly due to foreign matter accumulation on contact surfaces, which can lead to infectious disease risks and compromised machining accuracy.
Innovation Solution
A cutting machining device is designed with a head, a holding unit, and a controller. The holding unit includes a workpiece holding portion, a contact plug, a cover with a box shape, and a touch sensor. The controller calculates the machining start position based on the initial position of the head and the contact position detected by the touch sensor, ensuring accurate machining and minimizing contamination by allowing for the replacement of the contact plug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a contact touch sensor is disposed in the machining region to measure tool length and achieve high machining accuracy, then machining precision is improved, but foreign matter accumulates on the contact surface leading to workpiece contamination
Solution Approach 1:
The patent introduces a contact plug as an intermediary component between the tool tip and the touch sensor. The contact plug is disposed on the workpiece surface and serves as a mediator for the tool length measurement process. This allows the touch sensor to function accurately while preventing direct contact between the tool and workpiece that would cause contamination. The contact plug acts as a temporary, disposable interface that eliminates the harmful effect of foreign matter accumulation.
Solution Approach 2:
The contact plug is designed as a disposable component that is attached to the workpiece surface temporarily during the measurement process. After use, it can be removed and discarded, preventing the accumulation of foreign matter on the workpiece. This disposable approach allows repeated use of the expensive touch sensor while minimizing contamination risks to the actual workpiece.
2Productivity
If the touch sensor is exposed in the machining region for continuous use, then measurement functionality is maintained, but foreign matter accumulates on the contact surface
Solution Approach 1:
The contact plug serves as a mediator that enables continuous measurement operations without direct tool-workpiece contact. Each new contact plug provides a clean contact surface for the touch sensor, allowing continuous productivity while preventing foreign matter accumulation on the actual workpiece.
Solution Approach 2:
The system employs a discard-and-replace strategy for contact plugs. After each measurement cycle or when contamination occurs, the contact plug is removed and discarded, and a fresh one is attached. This maintains continuous operational capability while preventing accumulation of harmful foreign matter on the workpiece.
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 device effectively suppresses contamination of the workpiece while achieving high machining accuracy, as the calculated machining start position ensures precise tool positioning and the detachable contact plug prevents foreign matter accumulation.
Implementation Method 1
a touch sensor that detects contact of a tip portion of the first tool with the contact plug
Data Source
AI summary
A cutting machining device includes a head, a holding unit, and a controller. The holding unit includes a workpiece holding portion, a contact plug-that a tool fixed to the head is contactable, a cover having a box shape and having a first opening in which the contact plug-is detachably held in a position separated from a fixed section of the workpiece holding portion in a surrounding wall, and a touch sensor that detects contact of a tip portion of the tool with the contact plug. The controller includes a calculator that calculates a machining start position by the tool, based on an initial position of the head and a contact position of the head which is detected by using the touch sensor, when the tip portion of the tool comes into contact with the contact plug.