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A Combined Fixture for Laser Shock Strengthening Steam Turbine Blades

A technology of laser shock strengthening and steam turbine blades, which is applied in the field of mechanical engineering, can solve the problems of blade positioning and clamping difficulties, and achieve the effects of easy clamping operation, low production cost and improved efficiency

Inactive Publication Date: 2018-06-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At this stage, when laser shock strengthening is performed on steam turbine blades, the fixture cannot touch the working area of ​​the blade, and it is difficult for the laser to achieve vertical impact on the surface of the blade, so the positioning and clamping of the blade has always been a technical difficulty

Method used

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  • A Combined Fixture for Laser Shock Strengthening Steam Turbine Blades
  • A Combined Fixture for Laser Shock Strengthening Steam Turbine Blades
  • A Combined Fixture for Laser Shock Strengthening Steam Turbine Blades

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited thereto.

[0041] As shown in the figure, the present invention includes clamping body 1, left clamping body 2 for fir tree-shaped blade root, right clamping body 3 for fir tree-shaped blade root, hexagon socket bolt 4, screw clamping mechanism 7, connection Flange 9, left clamping body 10 for outsourcing shoulder double T-shaped blade root, right clamping body 11 for outsourcing shoulder double T-shaped blade root, left clamping body 12 for fork-shaped blade root, for The right folder 13 and the collimator 17 of the fork-shaped blade root.

[0042]Threaded holes are evenly distributed on the opposite sides of the clamping surfaces of the three left clamping bodies 2, 10, 12, and the hexagonal bolt 5 passes through the left wall of the clamping body 1 to clamp the left clamping body 1. An anti-loosening wa...

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Abstract

The invention discloses a combined fixture used for laser shock strengthening of a turbine blade. The combined fixture comprises a fixture body, left clamping bodies, right clamping bodies, inner hexagon bolts, spiral clamping mechanisms, a connecting flange and a focusing device. According to the type of a blade root, the corresponding clamping bodies are selected and then combined to be the fixture. The left clamping bodies are used for locating. The spiral clamping mechanisms are rotated to drive the right clamping bodies to clamp the blade root, and inner hexagon nuts are rotated to fix the right clamping bodies to finish clamping. The position of the fixture is adjusted through a mechanical arm. An indicating light passes through two round holes of the focusing device and emits vertically on the starting point of the edge of the blade, and a locating standard is provided for the laser shock strengthening process of the blade. The invention belongs to the field of mechanical engineering. The combined fixture is suitable for clamping and locating of the blade with a fir-type blade root, the blade with an external and shrouded double T-shaped blade root and the blade with a fork-type blade root. The locating precision of the turbine blade and the working efficiency of laser shock strengthening are improved.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering, in particular to a combined fixture for laser shock strengthening of steam turbine blades, which is suitable for blades with fir tree-shaped blade roots, blades with double T-shaped blade roots with shoulders and fork-shaped blade roots Clamping and positioning of the blades. Background technique [0002] The principle of laser shock peening technology is that when short pulses with high power density pass through the confinement layer and act on the absorbing layer on the metal surface, the absorbing layer is rapidly vaporized and plasma gas is formed at the same time. The plasma gas expands rapidly, introducing residual compressive stress on the metal surface. Laser shock strengthening is a high-tech technology that can improve the fatigue resistance, wear resistance and corrosion resistance of metal materials. [0003] The blade is an important part of the steam turbine. The b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/356B23K26/70
CPCB23K26/356B23K26/702
Inventor 鲁金忠邵亦锴张圣洋罗开玉
Owner JIANGSU UNIV
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