Hob Peeling Tool Measurement Using Virtual Contact Points
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Solution Overview
Problem
Conventional measuring methods for hob peeling tools are not capable of accurately measuring the complex cutting edge geometry, particularly the rounded cutting edge, leading to inaccuracies in machining due to the skew arrangement of tool and workpiece axes, and require time-consuming re-clamping and are prone to errors.
Innovation Solution
A method involving a virtual cutting edge is calculated to determine the relative orientation and position of the tool and measuring device, allowing for precise measurement of the real cutting edge at specific virtual contact points along its curved surface, using a cylindrical sensing means such as a laser beam to detect deviations from the desired geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measuring machines are used to measure hob peeling tools, then the measurement process is simple, but the measurement precision is insufficient due to inability to account for space curve of contact points
Solution Approach 1:
The patent applies preliminary action by pre-calculating the space curve of contact points based on tool and workpiece geometry before measurement. The measuring device is pre-positioned and pre-oriented according to calculated parameters, enabling accurate measurement of the rounded cutting edge without requiring complex real-time adjustments during measurement.
2Measurement precision
If the tool is re-clamped between machining machine and measuring machine, then measurement can be performed, but time is lost and clamping errors occur
Solution Approach 1:
The patent merges the measuring function directly into the machining machine by enabling measurement of the rounded cutting edge in-situ without removing the tool. This integration eliminates the time-consuming re-clamping process and prevents clamping errors while maintaining measurement precision through proper positioning and orientation of the measuring device.
3Measurement precision
If conventional measuring methods are used, then the measurement process is straightforward, but measurement accuracy is compromised due to skew arrangement of axes
Solution Approach 1:
The patent applies parameter changes by calculating and adjusting the positioning and orientation parameters of the measuring device based on the skew arrangement of the tool and workpiece axes. The measuring device is positioned and oriented with specific parameters derived from the geometry of the rounded cutting edge and the space curve of contact points, enabling accurate measurement despite the complex skew configuration.
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 high-precision, automated, and cost-efficient measurement of hob peeling tools, reducing measurement errors and the need for re-clamping, while allowing for real-time adjustment of tool settings to compensate for wear and ensure accurate machining.
Implementation Method 1
using a cylindrical sensing means such as a laser beam to detect deviations from the desired geometry
Data Source
AI summary
The invention relates to a method for measuring a tool (1) for roll machining toothed workpieces, wherein a virtual contact points is calculator on a rounded virtual blade of a virtual tool. The relative orientation between the tool axis (B) and the measuring device (11) as well as a translational relative position between the tool and the measuring device are then calculated and adjusted on the basis of the calculated virtual contact point. The measurement is taken on the real blade in the adjusted relative orientation and relative position, and the measurement can be taken in particular using a cylindrical scanning means in the form of a laser beam, wherein the cylindrical scanning means tangentially contacts the virtual blade in the virtual contact point.