45results about How to "Avoid rework situations" patented technology

The invention provides a device and method for quickly coupling a large divergence angle laser to a single-mode optical fiber with a simple structure, small volume, and suitable for coupling a large divergence angle laser. The invention comprises a laser chip, a collimating mirror, a beam splitter, a corner cube, an industrial camera, a coupling objective lens and a fiber optic circulator; the method for optical fiber coupling is as follows: light the laser chip, pass through the beam splitter and the corner cube, and place it in the industrial camera A reference spot is formed on the upper surface of the fiber laser, and the fiber laser is turned on. The laser beam emitted by the fiber laser is incident from port 1 of the fiber circulator, and then exits from port 2 of the fiber circulator. Imaging in the industrial camera to form a coupling spot; finally, the reference spot and the coupling spot in the industrial camera image coincide, indicating that the laser chip (1) is in the same alignment as the coupling end face of the single-mode fiber to be coupled, and the coupling is completed. The invention can be applied to the field of optical fibers.

The invention discloses a method for removing fluorescent liquid in an aero-engine compressor casing. The method is used for carrying out fluorescent flaw detection on blades of the 3-7-stage compressor casing and cleaning away penetrating liquid. Cold air and a water vapor spraying gun are adopted for purging a blade installation groove in the upper end face of the 4-7-stage part of the compressor casing and a stopping block installation site in the 3-stage part of the compressor casing so that the penetrating liquid can flow out from a casing gap or the other stopping block installation site; hot water is adopted for cleaning in winter, redundant penetrating liquid on the surface is cleaned away, and to prevent excessive cleaning, only the water vapor spraying gun and hot water can be adopted for cleaning rather than cold air is directly adopted for purging; the casing is placed in a developing tank for development after being dried. Post-cleaning is carried out on the casing after a flaw detection result shows that the casing is up to standard, and because a small amount of penetrating liquid which does not influence flaw detection quality remains in the gap, cleaning after flaw detection is necessary. The casing is placed in the hot water to be soaked, compressed air and the water vapor spraying gun are adopted for purging the blade installation groove in the upper end face of the 4-7-stage part of the compressor casing and the stopping block installation site in the 3-stage part of the compressor casing till no penetrating liquid flows out of the gap, and the casing is dried through a fan or an oven. By means of the method, the cost is lowered, the production cycle is shortened, and the production quality is improved.