Static CNC Edge Finder With Plunger Tool Height Gauging
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Solution Overview
Problem
Existing CNC machines face challenges in efficiently locating the edges of workpieces and determining the height of tools due to the need for door closure during operations, which complicates the processes and requires expensive or delicate electronic devices.
Innovation Solution
A static edge finder and tool height gauge that can be used with the spindle stationary, allowing operations with the work enclosure door open, utilizing a plunger mechanism with a spring and retaining pin to detect edges and tool heights without spinning the spindle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a conventional edge finder is used with the spindle rotating, then edge detection function is achieved, but visibility is poor and operation becomes slow and inconvenient due to door closure requirement
Solution Approach 1:
The patent replaces the traditional rotating mechanical edge finder with a static mechanical edge finder that uses a plunger mechanism. Instead of relying on rotational motion and visual observation through a spinning indicator, the invention uses a stationary plunger that moves linearly to detect edges, eliminating the need for spindle rotation and improving visibility and operational convenience
Solution Approach 2:
The invention inverts the traditional approach by making the edge finder static rather than rotating. Instead of rotating the indicator and observing its motion, the plunger remains stationary in orientation but moves in position to detect edges, fundamentally changing the operational mode from rotational to linear translation
2Measurement precision
If expensive electronic spindle probes are used, then edge detection precision is improved, but device cost increases and device complexity increases
Solution Approach 1:
The patent employs a simple, inexpensive mechanical plunger mechanism instead of expensive electronic probes. The plunger is a basic mechanical component that can be easily manufactured and replaced if needed, eliminating the need for costly electronic sensors, batteries, and complex electronic circuitry while maintaining adequate measurement precision
Solution Approach 2:
The invention extracts the essential measurement function from complex electronic systems and implements it through a simple mechanical plunger. By taking out only the necessary edge detection capability and implementing it mechanically, the patent eliminates unnecessary electronic complexity and cost
3Reliability
If the door is closed during edge detection, then safety is maintained, but visibility and operational efficiency deteriorate
Solution Approach 1:
By replacing the rotating edge finder with a static plunger mechanism, the invention enables edge detection with the door open, improving visibility and operational efficiency while maintaining safety through the stationary nature of the device and controlled spindle movement
4Measurement precision
If traditional tool height measurement methods are used, then tool height can be determined, but the process becomes tedious and time-consuming
Solution Approach 1:
The static plunger mechanism serves multiple functions: it can be used for both edge detection and tool height measurement. By positioning the plunger appropriately, the same device performs both measurement tasks, eliminating the need for separate measurement tools and procedures, thereby reducing time and operational 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
Enables efficient and convenient edge detection and tool height measurement with improved visibility and reduced operational complexity, eliminating the need for expensive electronic devices and minimizing tedious processes.
Implementation Method 1
a spring-biased plunger
Data Source
AI summary
A static edge finder for finding an edge of a workpiece loaded in a CNC machine, and tool height gauge for finding the height of a tool loaded in a CNC machine.