Automated LSP process equipment system for aero-engine blade

Patent metadata

Field	Value
Publication number	US-12311468-B2
Application number	US-202117550836-A
Country	US
Kind code	B2
Filing date	Dec 14, 2021
Priority date	Aug 16, 2021
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

An automated laser shock peening (LSP) process equipment system for an aero-engine blade, including: a base, where a loading and unloading manipulator, working manipulator, reverse engineering mechanism, coating apparatus, and LSP apparatus are disposed; the loading and unloading manipulator is configured to grab a blade and place it on the reverse engineering mechanism, which includes a reverse engineering instrument and controller that are connected, the instrument can generate three-dimensional digital data of the blade, and the controller generates a working path for coating and LSP according to the data, and transmits the path to the working manipulator; the loading and unloading manipulator places the blade into the pallet, and the working manipulator drives the blade to a corresponding position according to the path. Independent locating and clamping systems of the pallet and the blade and the pallet and the manipulator fix a position of the blade relative to the manipulator.

First claim

What is claimed is:

1. An automated laser shock peening (LSP) process equipment system for an aero-engine blade, the automated LSP process equipment system comprising: a base, wherein a loading-unloading manipulator, a working manipulator, a reverse engineering mechanism, a coating apparatus, and an LSP apparatus are disposed on the base; wherein
the loading-unloading manipulator is configured to grab a blade to be processed and place the blade to be processed on the reverse engineering mechanism;
wherein the reverse engineering mechanism comprises:
at least one scanning device, used to scan a surface contour of the blade to be processed and generate and transmit three-dimensional (3D) surface contour data information to a controller,
wherein the controller is connected to the at least one scanning device, used to process the transmitted 3D surface contour data information and generate a working path of the working manipulator for performing an absorption layer coating operation and a LSP operation on the blade to be processed by using a reverse engineering, and used to transmit the working path to the working manipulator;

a detachable fixture, removably mounted on the working manipulator and used to receive and clamp the blade to be processed from the loading-unloading manipulator;
wherein the loading-unloading manipulator places the blade to be processed into the detachable fixture, and the working manipulator holds the blade to be processed clamped in the detachable fixture to a corresponding position to implement the absorption layer coating operation and the LSP operation through the working path generated according to the reverse engineering; and
a fixture standby station disposed on the base for holding the detachable fixture, and the fixture standby station takes the detachable fixture with a processed blade to a drying position for drying by using an axial flow ventilator,
wherein the fixture standby station comprises an unlocking block, and the unlocking block is used to release the detachable fixture from the working manipulator by pressing a locking apparatus disposed on the detachable fixture,
wherein the fixture standby station further comprises:
a servo motor, connected to a main shaft of the fixture standby station through a coupling, wherein a fixed ratchet and a movable ratchet are mounted on the main shaft, and the servo motor is configured to drive the fixed ratchet or the movable ratchet to rotate clockwise and counterclockwise; and
a plurality of cylinders, uniformly arranged on a base of the fixture standby station and used to pull the movable ratchet to detach from the fixed ratchet through limiting rods, wherein an annular T-shaped groove is provided on a lower end surface of the movable ratchet, a T-shaped head end of each of the limiting rods is slidably connected to the annular T-shaped groove, and an tail end of the each of the limiting rods is connected to a cylinder rod of corresponding one of the plurality of the cylinders, a disc spring is mounted under the lower end surface of the movable ratchet and is used to restore the movable ratchet to a state of being attached to the fixed ratchet;
wherein, under a state that the movable ratchet is detached from the fixed ratchet, as the fixed ratchet rotates clockwise, a clamping part of the fixture standby station is in a loosening state for placing in or removing the detachable fixture by the working manipulator,
as the fixed ratchet rotates counterclockwise, the clamping part of the fixture standby station clamps the detachable fixture, and the detachable fixture is released from the working manipulator simultaneously; and
under the state that the movable ratchet is attached to the fixed ratchet, the movable ratchet rotates 180° counterclockwise to bring the fixed ratchet with the detachable fixture from an initial position to the drying position for drying, after the drying, the movable ratchet rotates 180° counterclockwise again to bring the fixed ratchet with the detachable fixture to return to the initial position,
wherein a relationship between a rotation angle θ of a cam of the clamping part for clamping or loosening the detachable fixture and quantity of ratchet teeth is

θ
=

k
⁢

360
⁢
°

quantity
⁢

of
⁢

ratchet
⁢

teeth

 where, k is an integer;
through obtaining a length of a first rod, a second rod, and a third rod of the clamping part and an angle α between the cam and a horizontal direction in a clamping state, then obtaining:

θ
2

=

arctan
⁡
(

d
4

-

d
1

d
2

-

d
1

)

,

θ
1

=

arcsin
[

d
2

(

cos
⁢

θ
2

-
1

)

+

d
1

d
4

]

,

where θ 1 and θ 2 denote a rotation angle of the first rod and the second rod from the clamping state to a loosening state, respectively;
then a displacement Δx of a slider of the clamping part moving between the clamping state and the loosening state is:
Δ x=d 4 sin θ 1 +d 5 cos θ 2 −d 5 ,

a distance between the slider and a rotation point A of the fixed ratchet in the clamping state is: l SA =d 6 sin α+d 7 cos α,
and a distance between the slider and the rotation point A in the loosening state is: l′ SA =l SA −Δx=d 6 sin(α−θ)+d 7 cos(α−θ);
where, d 1 is a length of the third rod, d 2 and d 5 is a total length of the second rod, d 4 is

Assignees

• Univ Qingdao Technology
• Sichuan Future Aerospace Ind Llc

Inventors

• Li Changhe
• Zhang Zechen
• Liu Bo
• Zhang Shun
• Wang Binwei
• Yao Jiazhi
• Li Ang
• Gao Wei
• Zhang Yu
• Lu Bingheng
• Zhang Yanbin
• Liu Mingzheng

Classifications

• B24B19/14

  for grinding turbine blades, propeller blades or the like (using grinding belts B24B21/16) · CPC title

• F01D5/286

  Particular treatment of blades, e.g. to increase durability or resistance against corrosion or erosion (F01D5/288 takes precedence) · CPC title

• C21D10/005 Primary

  by laser shock processing · CPC title

• B23K26/352 Primary

  for surface treatment · CPC title

• B25J9/0084 Primary

  comprising a plurality of manipulators · CPC title