Laser Hole Cutting Path Correction for Scrap Drop and Burn Control
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Solution Overview
Problem
Laser processing machines face defects such as burning and scrap non-removal when cutting large holes in sheet metal, leading to processing inefficiencies due to small connection angles between dividing lines and hole processing lines.
Innovation Solution
The method involves setting a dividing line with a smaller initial connection angle to a predetermined angle, correcting it by offsetting inward along an auxiliary line, and adjusting the connection angle to prevent burning by ensuring the corrected dividing line has a larger angle, thereby preventing excessive metal melting and ensuring scrap removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dividing line is set with a small connection angle to the hole processing line, then the hole forming region can be divided into small scraps, but burning occurs and the scrap does not fall
Solution Approach 1:
The patent changes the geometric parameter of the dividing line by introducing a curvature radius R at the connection point with the hole processing line. This parameter modification ensures that the connection angle is maintained at a sufficient magnitude, preventing burning while still achieving effective division of the hole forming region into removable scraps
Solution Approach 2:
The patent applies curvature to the dividing line at its connection point with the hole processing line by defining a curvature radius R. This curved transition replaces a sharp angular connection, distributing the thermal load and preventing excessive metal melting (burning) while maintaining the dividing function
2Device complexity
If the connection angle between the dividing line and hole processing line is small, then the dividing line can be set, but excessive metal melting occurs at the connecting point
Solution Approach 1:
The patent modifies the geometric parameters of the dividing line by introducing a curvature radius R at the connection point. This parameter change transforms the dividing line from a straight angular connection to a curved transition, distributing thermal energy and preventing excessive metal melting at the connecting point
Solution Approach 2:
The patent preemptively addresses the burning problem by designing the dividing line with a curved connection (curvature radius R) before processing occurs. This preliminary geometric configuration prevents excessive heat concentration at the connection point, counteracting the harmful thermal effects before they can cause burning
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 approach effectively suppresses processing defects by ensuring the scrap falls correctly, improving the accuracy and efficiency of cutting large holes in sheet metal.
Implementation Method 1
The laser processing machine irradiates, with a laser beam, a sheet metal mounted on a table
Implementation Method 2
a phenomenon referred to as burning, in which a metal is excessively molten in a vicinity of the connecting point
Implementation Method 3
the excessively molten metal spreads due to an assist gas
Data Source
AI summary
At least one dividing line formed of a straight line is set in a hole forming region surrounded by a hole processing line. It is determined whether or not a smaller one of connection angles at a first connecting point at which the dividing line is connected to a hole processing line is smaller than a predetermined angle. When the connection angle is smaller than the predetermined angle, a line segment between an auxiliary line and the hole processing line is replaced with corrected dividing line. A corrected connection angle at a second connecting point at which the corrected dividing line is connected to the hole processing line is set so as to be larger than a connection angle before correction.