Main causes of flame cutting quality defects
In the actual production process, the CNC flame cutting machine usually produces one or the other quality problems, mainly including the following defects: edge defects, cutting section defects, dross, cracks, etc. There are many reasons for the quality accident. If the oxygen purity is guaranteed to be normal... In the actual production process, the CNC flame cutting machine usually produces one or the other quality problems, mainly including the following defects: edge defects, cutting section defects, Hanging slag, cracks, etc. There are many reasons for quality accidents. If the oxygen purity is normal and the equipment is operating normally, the causes of flame cutting quality defects are mainly reflected in the following aspects: torch, cutting nozzle, steel itself quality, steel plate material.
PVC Internal Lubricant TL-60 /60A is based on neutral dicarboxylic acid ester of saturated fatty alcohols. It is a white or slight yellow debris or free-flowing powder, odourless. It can not be dissolved in water but dissolved in tributyl phosphate (TBP) and trichloromethane. Its melting point is 42-48,flash point >225°C,volatiles (96 hour/90°C) <1%.
1. The upper edge cuts the quality defect which is a quality defect due to melting.
(1) Collapse of the upper edge: the edge melts too fast, causing the rounded corner to collapse.
the reason:
1 The cutting speed is too slow and the preheating flame is too strong;
2 The height between the cutting tip and the workpiece is too high or too low; the cutting nozzle number used is too large and the oxygen in the flame is excessive.
(2) Droplet-like melted bean string phenomenon: a string of droplet-shaped melted beans is formed on the upper edge of the cut.
the reason:
1 The surface of the steel plate is rusted or oxidized;
2 The height between the cutting nozzle and the steel plate is too small, and the preheating flame is too strong;
3 The height between the cutting tip and the steel plate is too large.
(3) The upper edge collapses and presents an eaves-like phenomenon: at the upper edge of the incision, an eaves-like convex collapse is formed.
the reason:
1 preheating flame is too strong;
2 the height between the cutting tip and the steel plate is too low;
3 The cutting speed is too slow; the height between the cutting tip and the workpiece is too large, the cutting nozzle number used is too large, and the oxygen in the preheating flame is excessive.
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Internal Lubricant, High Efficiency PVC Internal Lubricant, Internal Lubricant Loxiol G16, Internal Lubricant Loxiol G60
Shandong Novista Chemicals Co.,Ltd (Novista Group) , http://www.novistachem.com