Laser Cutting Path Control for Scrap Drop Between Skids
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Solution Overview
Problem
Conventional laser processing machines fail to effectively remove scrap metal from between skids, leading to welding or abrasion issues due to improper setting of dividing lines relative to skid positions, resulting in reduced scrap falling off and increased skid wear.
Innovation Solution
A laser processing machine and method that includes a control device to set dividing lines in laser processing machines, positioning them at a distance from interfering skids to prevent welding and ensure scrap falls off, by calculating the gravity center and determining skid interference, thereby optimizing scrap removal and reducing skid abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the dividing line is set without considering skid position, then the opening forming area can be divided into equal parts, but the cut scrap may be welded to the skid and fail to fall off
Solution Approach 1:
The control device calculates the gravity center of the opening forming area and determines skid interference positions before setting the dividing line. This preliminary analysis allows the dividing line to be positioned at an optimal distance from the skid, preventing weld contamination while ensuring scrap falls off reliably.
Solution Approach 2:
The patent changes the parameter of dividing line position from a fixed equal division approach to a dynamic position based on calculated distance from the skid. By adjusting the position parameter according to gravity center and skid interference data, the system optimizes both manufacturability and scrap removal reliability.
2Productivity
If the dividing line is set proximate to the skid, then the scrap can be divided, but the skid is fused and abraded
Solution Approach 1:
The control device acts as an intermediary that calculates the optimal distance between the dividing line and the skid based on gravity center analysis. This intermediary calculation prevents the dividing line from being set too close to the skid, thereby avoiding weld contamination and skid damage while maintaining effective scrap division.
Solution Approach 2:
Before cutting the dividing line, the control device preliminarily determines the skid interference position and calculates the safe distance to set the dividing line. This preliminary action prevents harmful weld contamination and skid abrasion before they can occur.
3Shape
If the gravity center of the cut scrap is proximate to the skid, then the scrap can be positioned, but the scrap remains on the skid and does not fall off
Solution Approach 1:
The control device preliminarily calculates the gravity center of the opening forming area and determines the skid interference position before setting the dividing line. This preliminary gravity center analysis ensures that the resulting scrap pieces have their gravity centers positioned away from the skid, enabling reliable scrap fall-off.
Solution Approach 2:
The patent changes the parameter of scrap gravity center position from an uncontrolled variable to a controlled parameter by adjusting the dividing line position. By calculating the optimal distance from the skid based on gravity center analysis, the system ensures scrap pieces are positioned for reliable removal.
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 solution significantly increases the likelihood of scrap falling off between skids and reduces skid abrasion, addressing the limitations of conventional methods by strategically setting dividing lines based on skid positions and gravity centers.
Implementation Method 1
cut a material by irradiating the material placed on the skids with a laser beam
Implementation Method 2
cut a material by irradiating the material placed on the skids with a laser beam
Implementation Method 3
cut a material by irradiating the material placed on the skids with a laser beam
Implementation Method 4
the scrap is caused to be fallen off downward from between the skids
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
An NC device (20) controls a processing machine body (80) so as to form an opening by cutting the periphery of an opening forming area in a material (a sheet metal W). In a case where a skid (13) interferes with the opening forming area and the interfering skid (13) is positioned within a margin from a first gravity center of the opening forming area in an alignment direction of the skid (13), the NC device (20) controls the processing machine body (80) so as to cut the opening forming area with a dividing line set at a position that is apart by a predetermined distance from the skid (13) in the alignment direction of the skid (13). The predetermined distance is a distance in which the material is not welded to the skid (13) in a case where the opening forming area is cut with the dividing line and is a distance in which, among a plurality of scraps formed by cutting the opening forming area with the dividing line and by cutting the periphery of the opening forming area, a second gravity center of a scrap interfering with the skid (13) is positioned at a distance longer than the margin from the skid (13).