Common problems in laser cutting processing-Eason
Frequently asked questions during laser cutting:
“Stainless Steel category”: (the amount of defocus according to the thickness of the plate adjustment)
①: The more focus it is on the brighter the cutting surface.
②: The lower surface of the hard slag is: The focus is too high, the speed is too slow, the pressure is too small.
③: The more focus is on the rougher the cutting surface.
④: The bottom surface hangs the soft slag is: the focal point is too, the speed is too fast, the pressure is too big, the power is too high.
⑤: The focus is not right, the power is too low, the speed is too fast.
“Carbon Steel”: (Defocus according to the thickness of the plate adjustment)
The following surface hanging hard slag is:
①: The focus is too low; ②: The pressure is too small; ③: power is too small; ④: too fast.
Rough cutting surface is:
①: The focus is too high; ②: too much pressure; ③: too much power; ④: Material problem.
Selection of cutting nozzles and lenses: (Cutting parameters)
One: the choice of nozzle and lens when cutting carbon steel:
①: Choice of Lenses:
Use (5-inch) lenses for cutting 1-8mm carbon steel.
Use (7.5-inch) lenses for cutting 8-10mm carbon steel.
②: Nozzle Selection:
Use (φ1.4) nozzles when cutting 1-6mm carbon steels.
Use (φ2.0) nozzles when cutting 6-10mm carbon steels.
Two: the choice of nozzle and lens when cutting stainless steel:
①: Choice of Lenses:
Use (5 inch) lenses for cutting 1-4mm stainless steel.
Use (7.5 inch) lenses for cutting 4-6mm stainless steel.
②: Nozzle Selection:
When cutting 1-3mm stainless steel, select (φ1.5) nozzle. 10㎏-13㎏ when cutting (nitrogen pressure)
When cutting 3-4mm stainless steel, select (φ2.0) nozzle. 13㎏-15㎏ when cutting (nitrogen pressure)
When cutting 5-6mm stainless steel, select (φ2.5) nozzle. 14㎏-16㎏ when cutting (nitrogen pressure)
Types and effects of gases used:
Air: ①: Used as a cutting gas ②: Use ③ as a cooling cutting head: Use as a light path for internal dust removal (protect lenses to prolong the use of lenses)
General oxygen: As a carbon steel cutting gas (combustion-supporting) purity 99.5%
Pure nitrogen: As a stainless steel cutting gas (cooling) purity 99.9% (cut carbon steel speed of 3/4)
High Purity Nitrogen: the use of gas as a laser 99.999%
High purity Helium: the use of gas as a laser 99.999%
High-purity carbon dioxide: the use of gas as a laser purity 99.999%
Size of the cutting hole: (distinguish between material and thickness)
① cutting 8㎜ within the carbon steel plate, the aperture can not be less than the thickness of the plate, cutting 10㎜ within the plate, the aperture can not be less than 1.2 times times the thickness of the plate.
② cutting 4㎜ within the stainless steel plate, the aperture can not be less than the thickness of the plate, cutting 4㎜ above the plate, the aperture can not be less than 1.2 times times the thickness of the plate.
③ if the aperture exceeds the above range, the pulse cutting or marking process is used.
Pulse Cutting: (relative to continuous wave cutting)
The ① velocity is a continuous wave of $number.
The ② power is larger than the continuous wave.
The ③ pressure is about twice times larger than the continuous wave. Perforation using continuous wave
Perforation Mode: (applicable to cut carbon steel)
① normal perforation: Suitable for use when cutting 5㎜ carbon steel below.
② progressive perforation: used when cutting 6-8㎜ carbon steel. (must revise the corresponding parameter P990012)
③ powerful perforation: used when cutting 10-12㎜ carbon steel (burst hole mode).
Perforation height is not less than the height of cutting, perforation pressure is not less than 1.0.
Parameters of the introduction line (suitable for cutting stainless steel)
① cutting 1-3㎜ stainless steel using a single (cut small round or deceleration) way.
② cutting 3-6㎜ stainless steel with two (cut small round or deceleration) way.
The pressure of the ③ is 1.5 times times larger than that of the cut.
The cause of “burst hole”:
① perforation time is not enough
② pressure is too big
③ the focus is wrong.
④ perforation height is too low
⑤ Pulse Frequency inconsistency
⑥ Power is too large