Machining Tool Path Connecting Segments
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Solution Overview
Problem
Existing machining methods for producing finished parts using machine tools result in high machine load and inefficient machining times due to abrupt direction changes and geometrically calculated connecting segments that do not consider forward feed relationships or machine-specific dynamics, leading to excessive wear and increased costs.
Innovation Solution
The method involves determining the shape of connecting segments in the machining path based on the forward feed rates at the end of the first and start of the second machining segments, adapting the connecting segment's shape to match the higher forward feed, and considering machine-specific characteristics like anisotropic axis acceleration profiles to optimize the machining process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If connecting segments are calculated using only geometric relationships, then the machining path is simple to determine, but the machine load increases and machining efficiency decreases due to abrupt direction changes
Solution Approach 1:
The patent transforms the connecting segment calculation from a purely geometric problem to a physics-based problem by introducing dynamic parameters (acceleration, velocity, mass, moment of inertia). The shape of connecting segments is determined by optimizing these physical parameters to reduce machine load and improve machining efficiency, rather than simply connecting endpoints geometrically.
Solution Approach 2:
The patent applies dynamic principles by considering the time-varying characteristics of machine tool motion. The connecting segments are designed to account for acceleration and velocity changes, making the machining process dynamic rather than static. This allows for smoother transitions and reduced abrupt direction changes.
2Reliability
If connecting segments are designed to reduce machine load and acceleration, then machine wear decreases, but machining time increases
Solution Approach 1:
The patent applies partial action by optimizing only the connecting segments (the non-machining portions) rather than the entire toolpath. The machining segments maintain their original efficient paths, while only the connecting portions are modified to reduce machine load. This selective optimization balances machine durability with machining time.
Solution Approach 2:
The patent changes the parameters of connecting segments (shape, length, curvature) based on dynamic calculations that optimize the balance between machine load reduction and time consumption. By adjusting these parameters, the system achieves a compromise that protects the machine while maintaining acceptable machining speeds.
3Productivity
If high forward feeds and strong accelerations are used in high-speed machining, then productivity increases, but machine load effects and wear increase
Solution Approach 1:
The patent converts the harmful effect of high accelerations and machine load into a beneficial optimization process. By explicitly calculating and optimizing connecting segments based on acceleration and load characteristics, the system transforms what would be harmful abrupt changes into controlled, optimized transitions that protect the machine while maintaining high-speed machining capabilities.
4Reliability
If the tool is retracted to clearance distance during connecting segments, then material engagement is avoided, but machining time increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the optimal shape and length of connecting segments before machining begins. This allows the system to plan the most efficient path that minimizes retraction distance and connecting time while still protecting the tool, rather than using fixed or conservative retraction strategies.
Data Source
AI summary
The present invention relates to a method for machining a blank (10) by means of a tool (12) for producing a finished part, wherein the tool (12) is moved during the machining on a guide path (14) comprising at least three successive path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′) in the form of two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) and one connecting segment (18; 18-1; 18-2; 18′), which connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2) to one another, and wherein the connecting segment (18; 18-1; 18-2; 18′) of the path segments (16, 18, 20; 16-1, 18-1, 20-1; 16-2, 18-2, 20-2; 18′), which connecting segment connects the two machining segments (16, 20; 16-1, 20-1; 16-2, 20-2), is determined in terms of its shape by the forward feed (F1) of the tool (12) at the end (24) of the first machining segment (16) and by the forward feed (F2) of the tool (12) at the start (30) of the second machining segment (20).