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Method for automatically repairing crack, and apparatus therefor

An automatic repair and crack technology, applied in the field of cracks in components, can solve the problems of taking into account the situation of no branch cracks, the depth of cracks cannot be determined, the path of cracks cannot be judged, etc.

Inactive Publication Date: 2003-05-28
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] However, in the above technique, the situation of the branched cracks is not taken into consideration, and the depth of the cracks cannot be determined when projected in a wide field of view, and the path of the cracks cannot be judged when projected in a narrow field of view
As a result, the accuracy of crack determination is reduced

Method used

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  • Method for automatically repairing crack, and apparatus therefor
  • Method for automatically repairing crack, and apparatus therefor
  • Method for automatically repairing crack, and apparatus therefor

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Embodiment Construction

[0023] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. However, unless otherwise specified, dimensions, materials, relative positions, etc., of constituent parts in the embodiments are illustrative only and are not to be considered as limiting the scope of the present invention.

[0024] Hereinafter, the present invention will be described by taking the repair of a crack generated on a turbine blade as an example, but the present invention can also be used for repairing parts other than turbine blades (parts to be repaired).

[0025] see figure 1 , The automatic crack repair equipment is provided with a remote camera 11, a laser slit light emitting part (laser slit sensor) 12, a CCD camera 13, a camera controller 14, a servo motor controller 15, and an image processing device 16 , master controller 17, input device 17a, memory 18, welder 19, grinder controller 20. When grinding, the general control...

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Abstract

The invention provides a method and apparatus for automatically repairing the cracks produced in the member to be repaired. A wide field image is obtained by photographing the whole surface of a blade 31 or the like in a wide field view by a remote camera 11 and the position of cracks on the surface of the blade is obtained as a rough position information of the cracks by processing the image of wide field view. Then, the cracks are photographed in a narrow field view at the predetermined spacing along the cracks based on the rough position information by light section method. The narrow field images are processed to obtain the position, width, and depth of the crack at each predetermined spacing, which compose crack data at the series of points, and the cracks are repaired based on the crack data at the series of points.

Description

technical field [0001] The present invention relates to a method of automatically repairing cracks in a part to be repaired and a device for this method, in particular a method of automatically repairing cracks produced in blades etc. in rotating machines and to a device for this method device of. Background technique [0002] Generally, cracks are prone to occur on blades of rotating machines (eg, blades of turbines) due to the harsh working environment. Therefore, it is necessary to periodically check whether cracks are generated during the operation of the turbine or the like. Specifically, the blades are inspected after the turbine is in operation and, if cracks are found, the blades are repaired. [0003] Recently, automatic welding equipment has been developed. Welding can be automatically performed by using such automatic welding equipment. However, in the case of repairing cracks, the states of cracks vary, and it is difficult to repair cracks with automatic weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/00B23P6/00F01D5/00G01N21/94
CPCF01D5/005G01N21/94B23P6/007B23P6/045
Inventor 北川朋亮藤田宪纲谷俊彦妻鹿雅彦竹内康
Owner MITSUBISHI HEAVY IND LTD
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