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Finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method

A quality control method, ultra-fast laser technology, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve problems such as deformation, achieve broad application prospects, reduce unevenness of parts, and improve cutting quality

Active Publication Date: 2019-02-22
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a quality control method for picosecond ultrafast laser cutting of fingertip sealant sheet to solve the deformation problem caused by picosecond ultrashort pulse laser cutting of large-sized parts with a pulse width greater than 10 ps, ​​and realize no deformation and small remelting layer Ultrashort Pulse Laser Cutting of Thin Sheet Parts

Method used

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  • Finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method
  • Finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method
  • Finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method

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Embodiment Construction

[0029] A quality control method for picosecond ultrafast laser cutting of fingertip sealant sheet of the present invention comprises the following steps:

[0030] Step 1: Clamp the plate on the fixture of the picosecond ultrashort pulse laser machine tool, the flatness of the clamping surface is less than 0.06mm; the laser output wavelength of the picosecond ultrashort pulse laser machine tool is 532nm, the repetition frequency is 200KHz, and the output average power for 20W.

[0031] Step 2: Use picosecond ultrashort pulse laser machine cutting to form fingertip seams and positioning holes. When cutting, cut in layers according to the thickness of the plate, and use different cutting speeds for each layer;

[0032] Step 3: Cut the outer circle and the inner circle by means of arc segment cutting, the cutting sequence is: outer circle, inner circle, inner circle, outer circle, that is, the outer circle is cut with a symmetrical staggered cutting method to form multiple interva...

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Abstract

The invention discloses a finger tip tight sealing sheet picosecond ultra-fast laser cutting quality control method. The deformation problem caused by local heat stress introduced during picosecond laser cutting can be solved. According to the method, a manner of segmented cutting is adopted, a part is divided into symmetrical areas on the macro level according to the structural characteristic tobe cut, a ring is divided into small arc segments, and an outer circle and an inner circle are cut in a staggered manner; and when each small arc segment is cut, the cutting trajectory is layered, thecutting speed at different layer numbers changes according to a certain rule, the chip breaking falling behavior of each small arc segment material is controlled, and therefore a cutting effect of stress balance in each cutting area is achieved as a whole.

Description

technical field [0001] The invention belongs to the technical field of picosecond ultrafast laser cutting technology, and in particular relates to a quality control method for picosecond ultrafast laser cutting of fingertip sealing sheet. Background technique [0002] Due to the significant thermal effect of long-pulse laser cutting, when cutting metal sheets with a thickness of less than 0.5mm, thermal deformation will occur in the processed parts, so it is impossible to achieve micron-scale cutting. Using an ultrashort pulse laser with a pulse width of more than 10 ps as the light source, and cutting the metal sheet according to the long pulse cutting method, thermal stress will still be introduced in the cutting area, and the fingertip of the sealing sheet will be deformed and warped macroscopically. Fingertip seals for aero-engines need to cooperate with the rotary shaft, so they have the characteristics of large size and high precision, and put forward high requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/00B23K26/38
CPCB23K26/38B23K31/003
Inventor 孙珅李伟剑于武桓恒赵辞
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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