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Method for cutting 3mm stainless steel by laser

A laser cutting and stainless steel technology, applied in laser welding equipment, welding/welding/cutting items, manufacturing tools, etc., can solve the problems of work hardening affecting the smooth progress of subsequent processes, lack of cutting process window, large linear expansion coefficient, etc. The effect of low cost, fast cutting speed and long life of cutting nozzle

Inactive Publication Date: 2021-05-07
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The work hardening phenomenon caused by the previous feed or the previous process seriously affects the smooth progress of the subsequent process
[0004] The traditional method of cutting stainless steel has many disadvantages: large cutting force, high cutting temperature, not easy to break chips, easy wear of tools, large linear expansion coefficient
Based on the above reasons, it is of great significance and practical value to use other cutting methods to obtain high-quality slits. At present, there is no optimal cutting process window for stainless steel with this plate thickness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0016] Purchase 3mm 304 stainless steel plate, remove oil and dust on the surface, position the plate, debug laser related equipment, check whether the cutting head lens needs to be replaced, whether the cutting nozzle is damaged, adjust the defocus, set the manipulator parameters, prepare nitrogen, and the cutting process parameters are : Cutting speed is 3m / min; laser power is 3.5kW; gas pressure is 1.4MPa; defocus is -2mm; working distance is 0.8mm; cutting nozzle diameter is 2.5mm; cutting gas is nitrogen. Prevent the cutting head from hitting obstacles during the cutting process, and keep away from flammable objects during the cutting process to ensure equipment and personal safety.

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Abstract

The invention relates to a method for cutting 3mm stainless steel by laser. The method comprises the following steps: removing greasy dirt and dust on the surface of the stainless steel, and keeping the surface of the stainless steel smooth; cutting stainless steel plate of 3 mm by adopting a ProCutter laser cutting gun, wherein the technological parameters are as follows: the cutting speed is 2-5 m / min, the laser power is 2.5 to 4 kW, the gas pressure is 1.2 to 1.8 MPa, the defocusing amount is -2 to 0 mm, the working distance is 0.6 to 1.0 mm, the diameter of a cutting nozzle is 2-3mm, and the cutting gas is nitrogen. When the method is used for cutting the stainless steel, the cutting process window which is free of adhering slag on the back face of a cutting seam and good in cutting seam quality and the optimal cutting process parameters are obtained by changing all the process parameters, the process stability is guaranteed, and repeatability is achieved.

Description

technical field [0001] The invention relates to a method for laser cutting 3mm stainless steel, in particular to a cutting method of laser cutting+3mm stainless steel plate+nitrogen gas. Background technique [0002] 304 stainless steel is the most widely used chromium-nickel stainless steel. As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; it has good hot workability such as stamping and bending, and has no heat treatment. Hardening phenomenon (use temperature -196 ° C ~ 800 ° C). Corrosion-resistant in the atmosphere, if it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion. Suitable for food processing, storage and transportation. Has good processability and weldability. Plate heat exchangers, corrugated pipes, household goods (category 1 and 2 tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshiel...

Claims

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Application Information

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IPC IPC(8): B23K26/38B23K26/60B23K103/04
CPCB23K26/38B23K26/60B23K2103/05
Inventor 王吉孝
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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